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application Dock material conveying rubber hose Dock material conveying rubber hose The application field of industrial hose covers various industrial production, manufacturing and circulation fields, and is widely used in petroleum, chemical industry, ship, dock, tank car, agriculture, food, beverage, medicine and other industries, as well as cold and hot water, steam, ventilation, cooling, fire protection, hydraulic pressure, and media such as gas, water, fog, muddy water, sand, iron particles and so on. Industrial grade rubber hose, whether the medium is water, gas, oil, chemicals or other, usually consists of inner rubber, outer rubber and intermediate layer. The intermediate layer is usually composed of braided components, which plays a role in strengthening the strength of the hose. Industrial hose with steel wire Industrial hose with steel wire In addition, steel wire is often embedded between the inner and outer rubber, which is suitable for vacuum negative pressure operation. Industrial hose with conductive wire Industrial hose with conductive wire There is also conductive wire, which is applicable to the working environment where sparks are prohibited, such as fuel classification In order to adapt to the physical and chemical conditions of operations in various industries, industrial hoses usually have very strict standards for the chemical raw materials and processes of internal and external colloids. According to the classification of working conditions, the common ones are: Cooling water insulation pipe Cooling water insulation pipe Water delivery hose. It is used for irrigation, gardening, construction, fire protection, equipment and tank car cleaning, agricultural fertilizer, manure, industrial sewage drainage, etc. PVC and EPDM are the majority of inner glue materials. High pressure steam pipe High pressure steam pipe Hot water and steam hoses. It is used for cooling water of refrigeration equipment, cold and hot water of engine, food processing, especially hot water and saturated steam of dairy plants. EPDM is the main internal adhesive material. Drinking water supply pipe Drinking water supply pipe Beverage and food hoses. It is used for non fat products such as milk, carbonic acid, orange juice, beer, animal and vegetable oils, drinking water, etc. The majority of inner rubber materials are NR or synthetic rubber. Generally, food level FDA, DVGWA, KTW or CE certification is required. Heavy air compression pipe Heavy air compression pipe Air hose. For compressors, pneumatic devices, mining, construction and other aspects. NBR, PVC composite, PU and SBR are the main internal adhesive materials. There are usually strict requirements for the applicable pressure. Double welded hose Double welded hose Weld the hose. For gas welding, cutting, etc. The inner rubber material is mainly NBR or synthetic rubber, and the outer rubber is usually made into red, blue, yellow and other colors to show special gases. Smoke and dust exhaust pipe Smoke and dust exhaust pipe Vent hose. It is used for hot gas, dust, smoke, chemical gas emission, etc. The inner glue is mainly made of thermoplastic materials and PVC. Generally, the pipe body has a telescopic design. Special pipe for road cleaner Special pipe for road cleaner Material suction and delivery hose. It is used to transport solid particles such as gas, fog, powder, particle, fiber, gravel, cement, fertilizer, coal dust, quicksand, concrete, gypsum, etc. NR, NBR, SBR and PU are the most common internal adhesive materials. Generally, the abrasion resistance of the outer glue is high. Petrochemical oil transportation composite suction pipe Petrochemical oil transportation composite suction pipe Fuel transfer hose. It is used for fuel, diesel, kerosene, petroleum, etc. NBR, PVC composite and SBR are the main internal adhesive materials. Generally, there are conductive steel wires between the inner and outer rubber to prevent sparks. Suction pipe for high concentration chemicals Suction pipe for high concentration chemicals Chemical hoses. For acid and chemical solutions. EPDM is the main internal adhesive material. Usually this type requires customized materials and designs.

As a flexible pressure resistant pipe fitting, the stainless steel metal hose is installed in the liquid transportation system to compensate the mutual displacement of the pipe or the connecting end of the machine and equipment, absorb the vibration energy, and play a role in vibration reduction and noise reduction. It has many advantages, such as good flexibility, light weight, corrosion resistance, fatigue resistance, high and low temperature resistance. Stainless steel metal hose is made of imported SUS304 (0Cr18Ni9) SUS316 (0Cr17Ni12Mo2) and SUS316L (00Cr17Ni14Mo2) materials. Among them, stainless steel wire braided hose, metal corrugated pipe for fluid transmission, stainless steel pump connected vibration damping hose, stainless steel fire hose, stainless steel corrugated compensator, and stainless steel corrugated pipe for gas machinery. The product has the advantages of good flexibility, corrosion resistance, fatigue resistance, high and low temperature resistance, shock absorption and noise reduction, strong sealing, long service life, etc. It is widely used in textile, chemical fiber, printing and dyeing, petroleum, chemical industry, steel, gas, air conditioning, automobile, fire protection, urban water supply, construction, metallurgy, petrochemical and other fields.

Vibrating screen is the key equipment in the solid control system, and also the first stage treatment equipment of the solid control system. Its work quality directly affects the control effect of the whole solid control system. During the drilling process, drilling fluid with a large amount of drilling cuttings is returned from the well. The role of the shale shaker is to separate the rock cuttings from the drilling fluid, so that cleaner drilling fluid can enter the next several stages of separation equipment. Drilling fluid shale shaker 1. Process characteristics of drilling fluid shale shaker The technical level of vibrating screen is mainly reflected in the processing capacity (processing capacity and separation particle size), stability of work, length of service life and flexibility of operation. The processing capacity of the vibrating screen is related to its structure, motion track, vibration frequency, vibration intensity, screen area and screen size. Modern vibrating screen is generally high-speed, linear (or nonlinear), fine and multi-layer vibrating screen, which plays a vital role in solid control system. 2. Working principle of drilling fluid shale shaker Traveling screen is mainly composed of screen box, screen vibration isolation spring and exciter, meter feeding drilling fluid tray, base and support. The working principle is that the rotation of the vibration exciter drives the screen box and screen mesh to move together, forming a reasonable movement track. The drilling fluid flows through the drilling fluid box to the screen screen of the screen box The solid phase is pushed out from the front of the screen box, and the liquid phase containing the solid phase smaller than the screen hole flows into the drilling fluid tank through the screen to complete the separation. When selecting the shale shaker, first select the appropriate screen according to the size and particle size of the solid particles in the drilling fluid, and the size of the holes on the screen is represented by "mesh". The so-called mesh number of the screen refers to the number of holes opened per inch (inn) of side length of the screen. The larger the mesh, the smaller the hole. For example, there are 12 holes per inch for a square hole starting screen, which is called 12 mesh screen and is represented as 12x12 by API standard. A very important parameter of vibrating screen is its processing capacity. In addition to the selection and determination of its own motion parameters, it is also affected by such factors as the type, density, viscosity, size and number of solid particles, and size of two holes of drilling fluid. Therefore, it should be comprehensively considered and reasonably selected in actual use.

The high-pressure hose has the special performance of oil resistance and high pressure, so what are the main basis for the selection of materials? 1. Function 2. The working environment of the product 3. Economic indicators 4. Safety factors 5. Production process Judging from the performance of the high-pressure hose, the main function of the tubing is oil resistance, so the oil-resistant material of the material components is the key point. Quality must be grasped. In the oil pipe, there are also high-pressure oil pipe series, which is the high-pressure hose we often say. There are requirements for pressure, so as the bearing layer of pressure - steel wire reinforcement layer. The steel wire material must be selected. From the working environment of the oil pipe, such as in the open air environment, on the mechanical equipment, on the ground, etc., taking into account these factors, the selection of materials should take into account the characteristics of anti-aging and wear resistance. Judging from the economic indicators of oil pipelines, to be economical is to use less money and produce more output value. Be sure to consider the stability of the material, the rationality of the formula, and the cost-effectiveness of the formula material. Considering the safety factor of the oil pipe, the requirements of the normal working environment of the oil pipe should be considered, and the anti-static, flame retardant and normal pressure resistance should be considered. The materials involved in this aspect should be selected well, and some important materials that are involved in various requirements are even more important. From the perspective of the manufacturing process of the tubing, the main consideration is the manufacturing economy, product stability and the feasibility of continuous production work. The material should meet the production requirements as much as possible.

1. The hose can only be used to transport the designed medium. 2. The hose is strictly prohibited to exceed the design working pressure. 3. The temperature of the medium conveyed by the hose should not exceed the factory requirements, oil -40℃~120℃, air -30℃~50℃, water emulsion below 80℃. 4. The hose should be kept clean and the inside should be rinsed clean. Prevent foreign objects from entering the lumen, obstructing the delivery of fluid, and damaging the device. 5. The arrangement of the hose should be kept away from the heat source as far as possible. If necessary, a device such as a casing or a heat insulation board can be used to prevent the hose from being heated and deteriorated. 6. Where the hose crosses or rubs against the mechanical surface, protective measures should be taken to prevent the hose from bursting due to wear. 7. The hose should be kept as straight as possible for on-site use. When it must be bent, sharp bends should be avoided. The bending radius should not be too small, and should be greater than 9 times the outer diameter. There should be a straight line section greater than 2 times the outer diameter of the tube at the connection between the hose and the joint. 8. Do not twist the hose during installation. Slight twisting of the hose can reduce its strength and loosen the fitting. Assembly should be done with the fitting tightened on the hose, not the hose on the fitting. 9. When installing the hose, avoid being in a tight state, and have a certain length allowance to keep the hose loose. 10. Protect the hose during daily use to prevent the hose from being squeezed, smashed, etc. 11. Be gentle when operating the control valve to reduce the pressure impact on the hose and prevent the hose from bursting. 12. The hose must use the matching regular "U" card, sealing ring, two-way, three-way, etc. It is strictly forbidden to use other substitutes. 13. The hose must be replaced immediately if there is leakage, rupture, bulge, corrosion of the joint card, broken wire, aging crack of the rubber layer, etc. 14. During daily use, inspection and replacement must be strengthened.

For safety and convenient operation and many other issues, the vulcanization method of rubber hoses is mostly vulcanized by vulcanization. , the vulcanization temperature is generally 145~153 degrees Celsius. According to the different pressurization methods of the hose, it can be divided into bare vulcanization, water-cloth vulcanization and water vulcanization. Bare Vulcanization Weaving, winding, knitting rubber hoses with small inner diameters, and knitting rubber hoses and coreless cloth-covered hoses are mostly bare vulcanization. This method is simple in process, low in labor intensity and high in production efficiency. It is difficult to control, and it is easy to produce quality problems such as air bubbles, delamination, and deformation. The operation process is to seal the two ends of the tube blank covered with the outer rubber to avoid delamination caused by steam rushing in during vulcanization. Bandaging water cloth vulcanization Generally suitable for the hard core method of forming the hose, wrap the water cloth tube blank on the three-roll forming machine or the water cloth wrapping machine, lay it flat on the vulcanization frame, and use a soft pillow as a backing (to prevent the rubber tube from pressing during the vulcanization process). ), and then sent to the vulcanization tank for vulcanization. For the hose with special structure and thick wall, in addition to the water-wrapped cloth, it is also necessary to use a rope or wire to pressurize it. water vulcanization It is generally suitable for coreless cloth sandwiched hose. The method is to seal the ends of the tube blank covered with the outer rubber, place it straight in the water tank, and pour cold water one by one, so that the tube body is completely submerged in the water. In order to maintain the balance of internal and external pressure, it is then sent to the vulcanization tank for vulcanization. Because this method needs to heat the water in the water tank into superheated water (generally the steam pressure is 0.4~0.5MPa), the vulcanization time is long and takes 2~3h. The production efficiency of this method of vulcanization is lower than that of bare vulcanization, but the quality of the hose is relatively stable.

1 Common faults of hydraulic pipeline parts of construction machinery The common failures of hydraulic pipeline parts in construction machinery mainly include hydraulic hose assembly failure and hydraulic steel pipe assembly failure! 3 kinds of pipe joint failure "Hydraulic hose assembly is a hydraulic hose (wire winding! Braided hose, cotton hose, etc.) and pipe joints (core! Jacket! Nut or flange core) are crimped and connected by special equipment to form an assembly, which can be directly connected. Assembly and connection with other components in the hydraulic pipeline "The hydraulic steel pipe assembly is generally made of seamless steel pipes and pipe joints welded, and there are also ferrules! The ferrule type assembly with the nut directly assembled on the steel pipe". 1.1 Types of hydraulic hose assembly failures! Cause and Solution For the hydraulic hose assembly, the crimping part is the weakest part of the whole assembly, and the quality problems that occur are mostly concentrated here. "In addition, due to the aging problem of the rubber, when it exceeds a certain period, the crimping part will also leak." Therefore, the hydraulic hose assembly is a wearing part and should be replaced regularly to avoid accidents. "The types of failures that often occur in hydraulic hose assemblies are as follows: Leakage at the crimping part! Hose burst! Hose sand holes leak oil! Hose assembly Oil leakage at the joint! Cracks on the outer rubber of the hose! Cleanliness of the inner wall of the hose". 1.1.1 Leakage at the crimping part Due to the poor control of the crimping size, the aging of the rubber will cause the leakage of the crimping part. In actual operation, the selection of the matching size of the rubber tube and the core and the selection of the crimping amount are very important. The expansion and deformation of the rubber itself makes it difficult to control its size. Currently domestic! There is no way to control its tolerance in a smaller range, such as the 19 pipe produced by Shenyang ISR Company, the nominal diameter of the inner hole is 19? 0.5mm, the outer diameter of the two-layer steel wire braided reinforcement layer is 27.5? 0.8mm" and According to the national standard or ministry standard, the outer diameter of the core selected is 19?0.1mm, the inner hole of the jacket is 28.5?0.1mm, and the outer diameter is 37?0.1mm." To assemble the die together, the cumulative tolerance is?1.4mm , and the optimal compression ratio of rubber is 0.42~0.5mm. If you consider the shrinkage and deformation of the core and the outer jacket after crimping, it is difficult to achieve the optimal compression ratio by controlling the crimping amount alone. In theory, it is easy to control, but it is more difficult in actual operation of mass production. The main reasons are: The reason for the rubber tube The dimensional accuracy of rubber hoses is not uniform. Even in the same batch of rubber hoses, different parts have different inner hole sizes. This is determined by the current production process of rubber hoses. "The current production process of rubber hoses includes core braiding and coreless braiding. All can only control the size within the tolerance range and cannot maintain uniform consistency; the inner rubber formulation and production cannot maintain the consistency of its hardness and forming shrinkage ratio. 2) Core! The effect of coat size The outer diameter of the core and the inner diameter of the outer jacket are the key dimensions that affect the amount of crimping. At present, the domestic production process controls the amount of crimping according to the shrinkage of the outer jacket. "The error of crimping amount introduced by the dimensional tolerance of the core and the outer jacket is 0.3mm. ". Core! The effect of shrinkage and deformation of the jacket! Core! The material of the jacket is different, and the amount of deformation and shrinkage after crimping caused by the difference in its mechanical properties is also different. If the jacket hardness is low, the internal stress of plastic deformation after withholding is small, and the locking force is small; The reinforcement layer is buckled, and the inner hole shrinks to a polygonal shape after crimping (currently, the multi-lobed Huff crimping machine is used for crimping), which results in uneven locking force, which is extremely unfavorable for sealing. If the hardness of the core is inconsistent, it will also cause crimping. Afterwards, the amount of shrinkage and deformation is different, the hardness is high, and the deformation is small, which is easy to cause the steel wire to break; the hardness is low, the deformation is large, the end of the core and the hose are in a saddle shape, and the actual compression of the rubber is small, which is easy to cause leakage. Core! The eccentricity of the inner and outer diameters of the jacket will also cause uneven deformation during crimping, which is also extremely detrimental to the sealing performance." Therefore, improve the production process of the hose! Measures such as effective control of the material and the amount of crimping of the core and jacket can effectively control the leakage of the crimped part." 1.1.2 Hose burst There are two phenomena when the hose bursts. The first is the position of the frying port: one is that the frying port is located within 25cm of the two ends of the hose from the jacket, the other is that the frying port is 25cm away from the jacket; the second is the shape of the frying port: one is that there is no frying port Regular shape; Second, the frying mouth is more regular and linear. "According to the distance and shape of the frying mouth of the hose, it can be judged that the failure of the hose assembly is the reason for the manufacture of the hose assembly! There are two types of reasons for the hose itself. If the hose bursts within 25cm from the jacket, this is due to the manufacture of the hose assembly. "The amount of crimping is too large, which will cause the steel wire to be buckled; the system pressure is too high, and the jacket is the weakest link of the assembly, which will also cause Explosion; the working conditions of the hose are relatively bad, the frequency of expansion and contraction is fast during operation, and there are both expansion and deformation stress and twisting stress during operation, which will affect the service life of the rubber hose. Therefore, controlling the amount of withholding and system pressure, changing the working conditions, etc. can better weaken the damage caused by the manufacture of the hose assembly." During operation, the oil pipe not only has to bear bending stress, but also torsional stress, so its failure frequency is high. After technical improvement, the length of the hose is lengthened to 1252mm, which reduces the influence of bending and torsional stress and reduces the frequency of failures. , to a certain extent, the probability of failure is reduced. "But to completely solve the problem, it is necessary to improve the working conditions and change the spatial position of the connecting steel pipe to improve the working conditions of the hose." The reasons for itself are "one is the reason for the manufacture of the hose, and the other is the unreasonable design and installation position of the hose." If the burst opening is in a regular line, it is the quality of the hose, such as the joints or the mechanical strength of the steel wire when the steel wire is braided. Some are caused by improper selection of the hose. "For example, the burst opening is irregular, which may be caused by the small bending radius or bending and twisting fatigue of the hose assembly after installation, or the hose is caused by external mechanical damage." For example, type 30F. When the loader system is improved, a 25/2S-1500C=45F hose assembly is used to replace the original 25 pipes (25 two-layer steel wire braided rubber hose, working pressure is 14Mpa; 25/2S two-layer steel wire winding pipe, working pressure is 18Mpa), the 25/2S tube appeared to burst after working for a month, and the explosion occurred in two places: one was at 20~30cm away from the jacket, and the other was in the middle position. "In a straight line" because the working pressure of the 25 two-layer steel wire braided hose cannot reach the design pressure, the 25/2S two-layer steel wire wound pipe is selected, but the designer does not understand the actual performance and use requirements of the 25/2S two-layer steel wire wound pipe: work It cannot be less than the minimum bending radius of 360mm, and cannot be used under dynamic pressure. "Therefore, the design only considers whether its working pressure meets the requirements of use." Moreover, the 25/2S two-layer steel wire winding pipe is limited in its structure, and the two-layer steel wire is wound. , The binding force between the layers is small, and it can only be used when the static pressure and the hose are basically stationary. "So the failure of the hose assembly is unavoidable." Finally, a 25 second-layer steel wire braided hose was re-produced. The problem was finally solved by increasing the strength of the steel wire layer and increasing the working pressure to 21Mpa." 1.1.3 Hose sand hole oil leakage The phenomenon of trachoma and oil leakage is generally manifested as leakage or linear injection after the outer rubber of the rubber tube is bubbling. "The oil leakage of the rubber tube trachoma is mostly caused by the quality of the rubber tube." If the inner rubber contains impurities, there will be local damage or defects when it is demolded. "But sometimes the outer rubber bubbling is not necessarily a trachoma, and only anatomical analysis can draw the correct conclusion." For example, when the inner rubber is ruptured due to fatigue, the hydraulic oil will seep out from the rupture, penetrate and diffuse along the reinforcing steel wire layer, and the outer rubber will leak out. The weak part of the glue forms oil bubbles, forming the same phenomenon as trachoma oil leakage." This needs to be solved by improving the quality of the rubber hose. 1.1.4 Oil leakage at the joint of the hose assembly The leakage at the joint is mainly caused by the inconsistency of the dimensional accuracy of the transition joint between the hose assembly joint and other parts of the hydraulic system. "For example, the connection between the ferrule type rubber hose assembly and the 24b inner taper pipe joint is often due to poor assembly of the ferrule or internal The quality problem of the taper pipe joint causes leakage at the fitting. For example, when the C-type rubber hose assembly is mated with the flared pipe joint, the assembly joint is a 60b cone, and the flared pipe joint is a 60b outer cone, and the angle tolerance of both is the same ? 30c, assuming that the dimensions of the two are just at the upper and lower limits, it is actually a wire-sealed fit. If the tightening force during assembly is not enough or the vibration during operation is too large, it is easy to cause leakage. Therefore, rationally design the connection assembly size! It is very necessary to improve the assembly accuracy." 1.1.5 Cracks on the outer rubber of the hose The inner rubber of the hose is an oil-resistant sealing layer, the middle is a steel wire reinforcement layer, and the outer rubber layer is just a protective layer. It seems that its role is insignificant, but it protects! Aesthetic effect "There are many outdoor operations of construction machinery, and the outer rubber of the hose should have the ability to resist ultraviolet rays. Otherwise, the outer rubber of the rubber hose will age and crack under the sun and rain, which will affect the appearance and make the user mistakenly believe that the rubber hose is damaged." For special purposes The rubber hose should use different rubber formulations to meet the needs." For example, Longyan Construction Machinery Co., Ltd. sent a batch of loader to the Qinghai-Tibet Plateau, and specially added a layer of tin foil to protect the outer surface of the rubber hose to resist the ultraviolet rays of the plateau, which is a good solution. solve this problem". 1.1.6 Cleanliness of the inner wall of the hose After the hose is cut off, a large amount of rubber powder will accumulate at the fracture, and the inner wall of the core-braided hose will have residual silicone oil and talc powder for demoulding, and it is difficult to remove the silicone oil and rubber powder mixed together. If burrs, iron filings or other dirt enter the hydraulic system, it will contaminate the hydraulic oil and cause serious failure of other parts of the system. "Adopt the newly developed sponge! The method of compressed air can solve the above problems well, and at the same time, it is necessary to prevent other secondary pollution in the production process, such as the cleaning of the workshop environment and the cleaning of the test liquid. 1.2 Common fault types of hydraulic steel pipe assembly! Cause and Solution Due to the small degree of bending of the steel pipe during installation, the positional accuracy of the steel pipe assembly is required to be high. Therefore, the common failure of the steel pipe assembly is that the spatial position accuracy does not match, and it cannot be installed and connected. "The harsh working conditions of construction machinery, such as vibration, welding, etc. The welding seam and the rubber hose assembly! The connection seals such as pipe joints are easy to loosen and cause leakage" 1.2.1 Spatial position accuracy does not match Such problems can generally be found during assembly and connection, and can be corrected in time without much impact on the quality of the entire construction machinery. "Surveying and mapping design of steel pipe assembly! Bending of steel pipes! Fixtures and fixtures during welding are required. Put forward higher requirements to ensure the spatial position accuracy of the product. "If there is an error in the size, the forced borrowing during installation will cause internal stress to the steel pipe assembly. When the machine is working, its vibration will cause leakage at the weld or joint seal. ". 1.2.2 Leakage of steel pipe assembly The leakage problem of the steel pipe assembly mostly occurs at the weld and joints. "General steel pipe or joint blisters! Leakage caused by cracks can be found during product testing, and some will also occur after a period of use." Steel pipe assembly Leakage occurs at the weld. The main reason for the leakage at the welding part of the steel pipe assembly is caused by the welding quality problem. "The material of seamless steel pipe is generally 20# steel, and the material of pipe joints is mostly 35# or 45# steel, and the two materials with inconsistent carbon content are welded. Together, the welding stress is large, the two materials are difficult to fuse, and it is easy to produce pores! Trachoma or de-soldering phenomenon "The main welding method currently used is manual arc welding! Carbon dioxide gas shielded welding and brazing, therefore, the most important thing to improve the leakage problem is to derust the welded part before welding! Degreasing, opening welding grooves and other processing links, and preheating can also be carried out if conditions permit." The leakage of the steel pipe assembly occurs at the joint, and the sealing of the steel pipe assembly and other parts is often done with a ferrule type! Flare! There are several reasons for leakage at the pipe joint, such as the looseness of the threaded connection, the failure of the seal, the mechanical damage of the sealing joint, or the matching accuracy of the assembly and other parts. "For example, the groove of the /O0 ring is too deep, the aging of the sealing ring, the loosening of the fitting caused by mechanical vibration, and the bumping of the flared conical sealing surface will cause sealing failure." Therefore, the steel pipe assembly must be protected. Match the sealing surface well to avoid mechanical damage to the sealing surface during production, transportation and assembly. 1.2.3 Cleanliness of steel pipe assembly Just like the hose assembly, the hydraulic system also has high requirements on the cleanliness of the steel pipe assembly. "The cleanliness of the steel pipe assembly is more difficult to meet the requirements than the hose assembly". The main factor that affects the cleanliness of the steel pipe assembly is the burr! Iron filings and rust "The most difficult thing to deal with is the rust problem" For the surface of the steel pipe, it can generally be treated by galvanizing or phosphating on the surface, or spraying paint according to the requirements, which can meet the requirements" but the inner wall of the steel pipe is rougher than the outside. , it is also easier to rust, even if it is coated with anti-rust oil, the oil will evaporate over a long time and it will also rust. The method that can be taken is: for steel pipes with an inner diameter of 19mm, use sandblasting to remove rust; 19mm steel pipe, first pickle with dilute acid, then clean the steel pipe, apply anti-rust oil after drying, and seal the port to maintain the cleanliness. 1.3 Common faults of pipe joints The common faults of pipe joints, in addition to the problems mentioned in the above-mentioned rubber hose assembly and steel pipe assembly, there are also two faults in pipe joint cracking and leakage caused by matching accuracy. 1.3.1 Cracking of pipe joints The cracking of pipe joints is the most common problem. "Sand inclusion! Impurities and other material defects, as well as the strength of the blank! The microstructure and so on will cause material cracking." The pores of the casting blank itself! The trachoma is serious, which will directly affect the performance of the pipe joint. "When the material is not selected properly, it is easy to cause the pipe joint to crack." For example, cold-drawn blanks are used for thin-walled parts. The metallographic structure is elongated along the axis, and the radial bearing strength is weak. It is easy to cause cracking when assembling and tightening. For example, the Z14 ferrule type welding end straight pipe joint produced by a certain factory is made of cold-drawn hexagonal steel. Longitudinal axial cracks "The number of cracks is not large, one or two occur occasionally, less than 1%, but rework, cutting, and reassembly are time-consuming and laborious" and the material was tested for flaws and no cracks were found in the material. After the stock of more than 1,200 joints All of them were extruded with a specially designed inner cone indenter (without damaging the mating surface), and it was found that 8 cracks were found. The reason for the cracks was found that the radial strength of the joints was not enough, and then the forging blanks were used to improve their metallographic properties. The organization, the problem was solved, and the cracking phenomenon never happened again. 1.3.2 Leakage caused by matching accuracy The dimensional accuracy of the pipe joint can easily lead to oil leakage at the connection and fitting. Even if the dimensional accuracy of the pipe joint meets the requirements and the matching accuracy with the steel pipe assembly, rubber hose assembly or other components is ignored, problems will occur. !Produce and strictly control its dimensional accuracy to reduce and prevent leakage.

For the application of rubber hose, the supply is in short supply in the industry. The high-pressure rubber hose with steel wire is the most commonly used. In view of its good pressure and oil resistance, it is used in equipment connection, construction machinery, hydraulic props, etc. The maximum pressure reaches 70Mpa. For the rubber tube with cloth, the water supply range is wider. Industrial water, mud, hydraulic oil, emulsified oil, hot water and tail steam can all use large-diameter rubber tubes. Six layers of cords sandwich a layer of spiral steel wire. Under the condition of applying negative pressure, the most widely used products are steel braided hoses, ordinary hoses, etc., and there are fewer exports of automotive hoses with higher technical content. The proportion of chemical fiber winding tube, braided tube, knitted tube, steel wire braided tube, winding tube and resin hose in the hose is more than 60%, which is also close to the international advanced level. Because the product structure is in line with international standards, it is beneficial to the export of my country's rubber pipe products. The production capacity of main rubber tube products ranks among the best in the world. Although my country's rubber tube products have the basic conditions for a large number of exports, the actual export volume is still small. According to statistics from the National Bureau of Statistics, the annual export value of rubber pipes in recent years only accounts for less than 1% of the total annual export value of rubber products, 9.5% of the annual export value of tires, and 1.4% of the annual export value of rubber shoes. In addition, it is estimated that the export value of my country's rubber pipe products accounts for about 10% of the total output value.

security A cross screwdriver can be used, which is not easy to slip and is very safe. Attach a safety cover to prevent damage to the front end of the hose clamp. The inner side of the hose clamp is very smooth and not easily damaged. Improve work efficiency As long as it is gently twisted, it can have good sealing performance. Usage: Various hose clamps for hose assembly Material rubber hose clamp: stainless steel SUS430 Shell: stainless steel SUS430 Bolt: Iron (galvanized) Safety cover: PE Rubber hose clamp specification table ※ Width of hose clamp: 9mm for FS-12~FS-22, 13mm for FS-25~FS-320 Distance between the opposite sides of the hexagonal part: 7 mm

Speaking of rubber products, they are almost ubiquitous and involve all fields. In daily life, we often encounter various types of rubber tires, such as car tires, truck tires, and new types of tires for shared bicycles. Among tire brands, Bridgestone, Michelin, Goodyear Tire and Rubber Company, German Horse, and so on are familiar. Of course, they are also among the top ten tire brands in the world. 2017 Tire Enterprise Ranking There are two tire companies in China that rank in the top ten, namely Zhengxin International and Hangzhou Zhongce. However, strictly speaking, Pirelli, ranking fifth, is also a Chinese company. ChemChina acquired the Italian company in 2015. Although two Chinese companies have squeezed into the top ten, there is a significant gap in sales compared to the size of tire giants. 2017 ranking of non tire rubber products Let's take a look at the top 10 global non tire rubber products in 2017 Non tire rubber products are mainly divided into the automotive industry and others (including conveyor belts, transmission belts, rubber hoses, sealing products, molded products, rubber metal bonding products, rubber rollers, and shoe sole materials, etc.). ContiTech, a subsidiary of Continental Germany, continued to rank first in non tire rubber product sales with $5.61 billion. Elmar Degenhart, Chairman of Continental Germany, stated that Continental Germany will continue to maintain its industry leading position through investment and acquisitions. In the next five years, ContiTech is expected to increase its sales to 10 billion euros. ContiTech has restructured the conveyor belt industry with a new strategy of shifting the focus of growth to industrial conveyor belts and placing greater emphasis on providing high-quality digital services to end users. analysis By comparing the two rankings, it can be found that many names appear repeatedly, such as Continental AG, Sumitomo, Bridgestone, etc., and some other enterprises are not listed one by one. In fact, tires and non tire rubber products are interconnected, both of which are rubber products. The key technology lies in the rubber performance formula and rubber material production process. Compared to tires, non tire rubber products have a wide range of applications, requiring more performance of rubber and higher comprehensive technology research and development capabilities for enterprises. Among the top 10 non tire rubber products, Bridgestone and Sumitomo Rubber Industries are mainly engaged in tires and also produce non tire rubber products; Mainland China and Treburg focus on the development of both tire and non tire rubber products; Enterprises mainly engaged in industrial rubber products, sealing, transmission, and rubber hoses include four companies: Friedenberg, NOK, Gates, and Parker; There are two companies specializing in automotive rubber parts, namely Hutchinson and Cooper Standard Automotive Parts. Rubber hose If further subdivided into the rubber hose business, then Hutchinson, Friedenberg, and Cooper's standard automotive parts mainly focus on the automotive rubber hose business; Sumitomo and Bridgestone mainly use hydraulic hose; Continent ContiTech, Gates Group, Treburg, and Parker Hannifin are highly comprehensive rubber hose product enterprises, with products covering automotive hose, hydraulic hose, industrial hose, marine hose, and so on. I believe everyone already has an answer in their minds on how to choose a rubber hose brand. Among the top 10 global non tire rubber products in 2017,

With the advancement of science and technology, the application range of new materials continues to increase. While the fine chemical industry is thriving, domestic production processes are also constantly improving rapidly. However, no matter how the process is improved, it is inseparable from the use of hydrochloric acid, sodium hydroxide, hydrogen peroxide solution, ethanol, acetone and other high-purity chemicals. These chemicals typically have hazards such as strong corrosiveness, flammability, explosiveness, and high toxicity. Therefore, there is a high requirement for the corrosion resistance of pipelines to prevent leakage of chemical pipelines during transportation and cause safety accidents. Taking common hydrochloric acid as an example, hydrochloric acid is not suitable for direct transportation through metal pipelines. Because: Therefore, the traditional construction plan for hard pipe pipelines uses double sleeves, which are pipes made of PP or PVDF material inside PVC pipes. And most of the soft connections are made of PP material pipe joints PP is the abbreviation of Polypropylene, and its Chinese name is polypropylene. Polypropylene has good chemical stability. It is relatively stable to other chemical reagents except for being eroded by concentrated sulfuric acid and nitric acid. However, low molecular weight aliphatic hydrocarbons, Aromatic hydrocarbon and chlorinated hydrocarbons can soften and swell polypropylene. At the same time, its chemical stability increases with the increase of crystallinity, so polypropylene is suitable for making various chemical pipes and accessories, The anti-corrosion effect is good. But its drawbacks are also quite obvious, such as temperature resistance, low low-temperature impact strength, and fragility; Aging due to exposure to light, heat, and oxygen. It is more suitable for making double set inner pipes, but it is often easily damaged when used at pipeline connections. Therefore, there is an urgent demand for high-quality corrosion-resistant products in the market. Teflon is highly favored by the fluid industry due to its excellent corrosion resistance, chemical stability, and other characteristics, and is considered an ideal material for chemical transportation systems. However, how to successfully introduce Teflon into joints is a major challenge in the industry. With its own knowledge and experience, Shanghai Weilan has successfully developed a generation of fluorine lined joints after years of research and development. The first generation fluorine lined joint is formed by sintering (melting and recasting) Teflon (PFA, FEP) particles on the surface of stainless steel under high temperature heating, and then finishing to obtain the joint product. The first generation fluorine lined joints have strong corrosion resistance and smooth inner walls, providing high-quality pipe joints specifically for the transportation of clean media, chemicals, and highly corrosive fluid media, meeting the vast majority of market demand. Upgraded version - fluorine lined joint However, the first generation fluorine lined joints have certain shortcomings due to process reasons, such as small diameter, affecting flow rate, etc., which cannot adapt to high demand applications. In this context, Shanghai Weilan has successfully developed the second generation fluorine lined joints. Compared to the first generation fluorine lined joints, they have the following advantages: Smooth surface Larger diameter and smaller flow loss Excellent conductivity Lightweight Yan Zhigao Hebei Yuanbai provides various connection forms of fluorine lined joints, such as TC, flange, CAMLOCK, conversion head, etc., to meet different needs. If you need more information about fluorine lined joints, you are welcome to consult Yuanbai Sales Engineer.

1. Environmental protection and hygiene: It eliminates the problems of red water, blue-green water, and hidden water. It has no odor, no harmful substances, and maintains the purity of water quality. Lead-free is harmless to human health. 2. Wear resistance: The surface is beautiful, clean, shiny, long-lasting, scratch free, and never rusts or breaks. 3. Low temperature resistance: Stainless steel water pipes and faucet angle valves for kitchen and bathroom never break. 4. Excellent thermal expansion performance and thermal insulation performance: stainless steel pipe has slow Thermal expansion, and good thermal insulation performance. 5. Authoritative certification: The precipitation amount of stainless steel metal elements is lower than 5% of the standard value specified by WHO and European drinking water regulations.

Pneumatic components are components that perform work by converting the elastic energy of compressed air into kinetic energy through the force generated by gas pressure or expansion. Such as cylinder, Pneumatic motor, Steam engine, etc. Pneumatic components are a form of power transmission, also known as energy conversion devices, that use gas pressure to transmit energy. Advantages of pneumatic components: 1. The pneumatic device has a simple and lightweight structure, and is easy to install and maintain. The medium is air, which is less flammable than hydraulic medium, so it is safe to use. 2. The working medium is inexhaustible air, and the air itself does not cost money. The exhaust treatment is simple, does not pollute the environment, and has low cost. 3. The adjustment of output force and working speed is very easy. The action speed of the cylinder is generally less than 1M/S, which is faster than the action speed of hydraulic and electrical methods. 4. High reliability and long service life. The effective action frequency of electrical components is about one million times, while the lifespan of general solenoid valves is more than 30 million times, and some high-quality valves exceed 200 million times. 5. Utilize the Compressibility of air to store energy and realize centralized gas supply. It can release energy in a short period of time to achieve high-speed response during intermittent movements. Can achieve buffering. Strong adaptability to shock loads and overloads. Under certain conditions, the pneumatic device can have self holding ability. 6. Pneumatic control has the ability to prevent fire, explosion, and moisture. Compared to hydraulic methods, pneumatic methods can be used in high-temperature situations. 7. Compressed air can be supplied centrally and transported over long distances.

Hydraulic quick connector is a necessary accessory designed for the connection of hydraulic pipelines between various Fluid power components. The application of hydraulic quick connector can provide leakage proof seals and system interfaces for the pipelines connected to the hydraulic system. To adapt to different working conditions and applications, hydraulic quick connectors have derived various types and shapes of products. The use of hydraulic quick connectors provides assistance for the normal operation of the hydraulic system. Adopting standardized usage methods can improve the service life of hydraulic connectors and provide guarantee for the operation of the hydraulic system. So, what are the factors that affect the performance of hydraulic quick couplings? 1. It is recommended to select a hydraulic quick connector with pressure greater than the system pressure. Pulse pressure greater than the maximum operating pressure will shorten the service life of the connector. 2. In order to ensure the airtightness of hydraulic quick connectors, components need to have good machining accuracy. Due to inadequate processing technology and insufficient assembly accuracy, hydraulic quick connectors may experience oscillation during use, reducing the flexibility of the connectors. 3. Components that work in long-term oily environments also need to have excellent oil resistance. 4. Temperature personnel need to pay attention to ensuring that static and transient fluid and environmental temperatures do not exceed the performance limits of hydraulic quick connectors. 5. Environmental care should be taken to ensure that hydraulic quick couplings are compatible with or protected from the environment they come into contact with. Environmental conditions such as ultraviolet radiation, ozone, saline water, chemicals, and air pollution can all cause premature failure of workpieces, so they must be taken into consideration. 6. Mechanical loads include excessive bending, twisting, twisting, stretching or lateral loads, bending radius, and vibration.

Not easy to rust Made of 100% stainless steel, resistant to rusting. security A cross screwdriver can be used, which is not easy to slip and is very safe. Attach a safety cover to prevent damage to the front end of the hose clamp. The inner side of the hose clamp is very smooth and not easily damaged. Improve work efficiency As long as it is gently twisted, it can have good sealing performance. Usage: Various hose clamps for hose assembly Material rubber hose clamp: stainless steel SUS304 Shell: stainless steel SUS304 Bolt: stainless steel SUS304 Safety cover: PE Rubber hose clamp specification table ※ Width of rubber hose clamp: 9mm for SB-12~SB-22, and 13mm for SB-25~SB-120 Distance between the opposite sides of the hexagonal part: 7 mm

Hebei Yuanbai Technology Co., Ltd. is a private enterprise specializing in the production of stainless steel metal hoses, corrugated metal hoses, stainless steel corrugated compensators, high-pressure rubber pipes, high-pressure steel wire woven rubber pipes, cloth clamping rubber pipes, large diameter rubber pipes, rubber seals, and other products. The company is a licensed manufacturer of special equipment pressure vessels, located in the "China (Jingzhou) Rubber and Plastic Pipe Industry Base" (Jingxian, Hebei Province). The company was established in 1990, with 300 employees and 100 professional technicians, including 30 senior technicians. For many years, the company has adopted advanced standards for design and production, with products such as stainless steel metal hoses, metal corrugated compensators, non-metallic compensators, cloth clamping hoses, high-pressure hoses, large-diameter hoses, fan coils, food hoses, oil delivery hoses, sandblasting hoses, armored hoses, etc. Our company's products are widely used in various industries such as steel, food production, petroleum, chemical, power, docks, construction, mining, cement, transportation, and other passenger roads and equipment, and have been applied in key national projects. Our company will continue to uphold the principle of "quality first, dedication to society". Actively promote the business philosophy of "only producing high-quality products" and strive to provide users with high-quality products and services. Our company is willing to work hand in hand with friends from all walks of life to create brilliance together

1. Structure: The fabric conveying hose is composed of an inner rubber layer, a multi-layer fabric wrapping layer, and an outer rubber layer. The cloth suction hose is composed of an inner adhesive layer, a multi-layer cloth winding layer, a spiral steel wire reinforcement layer, and an outer adhesive layer. 2. Features: The rubber hose has the advantages of small outer diameter tolerance, excellent oil resistance, heat resistance, lightweight, soft and durable pipe body, etc; The minimum bursting pressure of the rubber hose is four times the working pressure. 3. Usage: Various types of cloth clamping steel wire conveying (or suction) rubber pipes are made of corresponding materials according to different conveying media. The product has a reasonable structural design, excellent quality, and is sturdy and durable. It is a flexible rubber pipe used for conveying and suction (under negative pressure conditions) of various liquid viscous fluids, powder solids, and other material media.

1. Product structure: High pressure steel wire braided hose structure is composed of liquid resistant synthetic rubber inner rubber layer, Mesoglea, I or II or III steel wire braided reinforcement layer, and weather resistant synthetic rubber outer rubber layer. 2. Product Usage: Steel wire reinforced hydraulic rubber hoses are mainly used for hydraulic supports in mines and oil field exploitation. They are suitable for conveying petroleum based liquids (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) with certain pressure and temperature in engineering construction, lifting and transportation, metallurgical forging and pressing, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and various industrial departments' mechanized and automated hydraulic systems Water based liquid (such as emulsion, oil-water Emulsion, water), gas, etc. and liquid transmission equipment. 3. Working temperature: Oil: -40 ℃ -+100 ℃, air: -30 ℃ -+50 ℃, water lotion: below+80 ℃. If the temperature is higher than 80 ℃, please use our products. 4. Product features: 1. The rubber hose is made of special synthetic rubber, which has excellent oil resistance, heat resistance, and aging resistance. 2. The rubber hose has high pressure bearing capacity and superior pulse performance. 3. The pipe body is tightly bonded, soft to use, and has little deformation under pressure. 4. The rubber hose has excellent resistance to bending and fatigue. 5. The length of steel wire braided hose is large, φ A fixed length of over 32 is 20 meters, φ Below 25, it can reach up to ten meters or even more. 5. Technical performance indicators (diameter) of steel wire braided hydraulic hose φ 5-51, φ 51-127)Note: The steel wire braided hose of our company is designed and manufactured according to the GB/T3683-1992 standard, and ISO/DIS1436-1985, DIN2002, SAE100RIAT, SAE100R2AT standard hose can be manufactured according to the requirements. This standard is not suitable for Castor oil based and fat based liquids. 6. Precautions: 1. The bending radius should not be less than the given bending radius to prevent damage to the rubber tube skeleton or premature damage due to excessive stretching. 2. According to the usage conditions, choose the correct type and specification of the rubber hose, and do not misuse or substitute it. When using the rubber hose, the pressure should be evenly and slowly adjusted to avoid sudden pressure increase and damage to the pipe body. When the workplace changes, it should be moved off the ground and not dragged to avoid scratching the outer glue and corroding the skeleton layer. 5. When transporting corrosive liquids, the interior should be cleaned after use to prevent residues from corroding the pipe body for a long time, or corresponding series of products should be selected. The above parameters refer to the national standard GB/T3683-92 standard. For specifications that are not covered, please call for consultation.

The inspection requirements for rubber hoses have also been improved compared to before The continuous updating of technology has led to the development of products in the process of continuous updates and upgrades. At present, the inspection requirements for rubber hoses have also been improved compared to before. Inspection indicators for ultra-high pressure rubber hoses According to the safety regulations for high-pressure water jet cleaning operations, high-pressure hoses should meet the following indicators: 1) The blasting pressure should reach more than 2.5 times the working pressure. 2) The test pressure should reach 1.5 times the working pressure and be maintained for more than 2 minutes without damage. 3) Pulse pressure shall be within the range from zero to working pressure, and 50000 pressure pulses shall be free of damage; The pulse frequency with a working pressure of 1000-2800bar is 15 times/min, and above 2800bar, it is 110 times/min. Due to the widespread application of high-pressure cleaning machines in various industries, and the relatively worst working conditions of high-pressure hoses, we must pay attention to quality when purchasing high-pressure hoses to avoid unnecessary safety accidents.

At present, high-pressure cleaning machines have gradually been promoted and applied in various industrial fields in China, and are gradually expanding. The high-pressure hose in the high-pressure washer assembly is a necessary component to connect the nozzle and high-pressure water pump, and the high-pressure hose is a connection assembly between the pump and the jet unit. The following mainly introduces the joint forms and precautions of high-pressure rubber hoses. 1. The joint forms of high-pressure rubber hoses can be generally divided into internal thread forms and external thread forms 1) Internal thread form This structural form is generally suitable for situations with low working pressure and high flow rate. This connection method allows for an appropriate increase in the diameter of high-pressure pipes, and its sealing mainly relies on sealing rings. 2) External thread form This structural form is mainly used in high pressure situations, and this connection method is mostly used when the working pressure exceeds 1800bar. This connection method is achieved by compressing the locking nut with an external threaded connector, thereby tightly fitting the conical sealing surface of the pipe section with the sealing surface of the connected part, playing a sealing role. The connected parts can also be jet attachments, such as high-pressure spray guns, flat cleaning nozzles, three-dimensional rotating nozzles, etc., or other high-pressure rubber hoses. This connection method can effectively prevent loose connections under complex construction conditions. 2. Precautions for using conical sealing for high-pressure rubber hoses 1) This connection adopts a cone angle of 60 degrees, requiring the pipe end cone angle to be generally less than the hole cone angle by 1 degree; 2) The position of the pipe end must be sharp and not blunt; 3) The direction of thread rotation between the pipe end and the locking nut should be opposite to that of the external threaded connector; 4) When processing connecting parts, small holes should be reserved at the sealing area to prevent high-pressure water from leaking out when the conical surface is not tightly sealed. This can not only serve as a safety warning, but also facilitate observation and judgment, thus better protecting the sealing surface from damage