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Characteristics and uses of hydraulic hoses. Precautions for using hydraulic hoses



Hydraulic hose equipment medium temperature oil -40 C to 100 C; Air temperature range from -30 C to 50 C,; Water -0 degrees to 80 degrees. Hydraulic hose media is used for hydraulic power transmission or transportation of high-pressure media such as water, gas, and oil to ensure the circulation and transfer of liquid energy.

Hydraulic hoses are commonly used in domestic and foreign trade standards, including DIN, SAE, ISO, and GB/T standards; The standards for steel wire braided hydraulic hoses are: DIN EN 853, SAE J517, GB/T 3683-2011, ISO1436; The standards for wire wound hydraulic hoses are DIN EN 856, SAE J517, GB/T 10544-2003, and ISO3862. Hydraulic hose models and specifications 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 32, 34, 40, 42... are matched with their fittings and connected with metric fine thread or British pipe thread, which can be divided into sealed thread and unsealed thread. Characteristics and Applications of Hydraulic Hoses 1. The rubber hose is made of special synthetic rubber, which has excellent oil resistance, heat resistance, and aging resistance. 2. The pipe body is tightly bonded, soft to use, and has minimal deformation under pressure. 3. Rubber hoses have excellent resistance to bending and fatigue. 4. The rubber hose has high pressure bearing capacity and superior pulse performance.

Hydraulic hose products are mainly used for mine hydraulic supports and oilfield exploitation, suitable for engineering construction, lifting and transportation, metallurgical forging, mining equipment, ships, injection molding machinery, agricultural machinery, various machine tools, and various industrial sectors in mechanized and automated hydraulic systems to transport petroleum based liquids (such as mineral oil, soluble oil, hydraulic oil, fuel oil, lubricating oil) and water-based liquids (such as emulsions, oil-water emulsions, water) with a certain pressure (higher pressure) and temperature, as well as liquid transmission. The maximum working pressure resistance can reach 60MPa. Hydraulic hose precautions 1. Pipe inner diameter: The inner diameter of the hose. 2 The following precautions should be taken in the use and design of rubber hoses: 1. The bending radius of the hose should not be too small, and generally should not be less than the value specified in the Technical Characteristics of Hydraulic hose assemblies. The connection between the hose assembly and the pipe joint should have a straight section, and the length of this section should not be less than twice the outer diameter of the pipe. 2. The length of the hose assembly should take into account that the hose will undergo shrinkage deformation after being filled with pressure oil, with a general shrinkage amount of 3-4% of the pipe length. Therefore, when installing the hose assembly, it is not allowed to be in a tensioned state. 3. The rubber hose assembly should be installed without torsional deformation. The joint axis of the hose should be placed as much as possible in the moving plane to avoid damage to the hose when both ends move together. 4. Rubber hoses should avoid contact and friction with sharp mechanical parts to prevent damage to the pipes. Hydraulic hose safety measures: To ensure the safe and reliable use of the hose assembly, special attention should be paid to the following matters. 1. Pressure: The working pressure specified for the hose should generally not be less than the maximum system pressure. Only in infrequent use can it be increased by 20%; For those who use it frequently and frequently bend, it should be reduced by 40%. If the impact pressure of the system exceeds the specified working pressure of the hose, it not only reduces the service life of the hydraulic hose, but may also lead to personal and equipment accidents. 2. Temperature: The fluid temperature and ambient temperature, whether stable or instantaneous, must not exceed the temperature resistance limit of the hose. If the temperature is lower or higher than the recommended temperature of the hose, it can reduce the performance of the hose, cause damage, and lead to leakage. 3. Fluid compatibility: The fluid in the hose should comply with the specifications specified in the product sample for its intended use. Using it beyond the specifications cannot guarantee the service life and safety of the hose. 4. Appropriate end connection: Nut connection is widely used due to its convenience and low cost, but in cases of high vibration, the problem of nut loosening should be fully considered and flange connection should be adopted. Hydraulic hose connection method 1. Clamp joint connection - pressure range: 250-800 Bar; Applicable steel pipe size range: 4-42 mm; Applicable materials: carbon steel and stainless steel.




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