High-pressure steel wire braided hoseIt is a component of the hydraulic system that can withstand corresponding hydraulic pressure and has corresponding fatigue strength to ensure the sealing requirements of pipelines. Here we will introduce its production and quality inspection.

1、 Production process

1. Mix the inner layer, middle layer, and outer layer of the high-pressure steel wire braided rubber hose according to the formula using an internal mixer. At the same time, use an extrusion device to extrude the inner layer and cover it with a soft rubber coated with release agent.

2. Use a rolling mill to press the intermediate layer of adhesive into sheets, then add release agent and roll it up. Cut it into the specified width according to the manufacturing process requirements.

3. Next, weave the inner tube containing the core with copper plated steel wire or copper plated steel wire rope on the weaving machine. At the same time, it should be noted that on the weaving machine, the middle layer of rubber sheet should be woven synchronously between every two layers of copper plated steel wire rope and copper plated steel wire, and the ends of the steel wire should also be tied carefully.

4. Then wrap the outer layer of glue around the extruder, and then wrap it with lead wrap or vulcanized protective layer.

5. Put the high-pressure steel wire braided rubber hose into a vulcanization tank or salt bath for corresponding vulcanization.

6. Remove the sulfurized protective layer, then pull out the bracket and tighten the pipe joint.

2、 Quality inspection precautions

1. Size and actual error

Due to the fluctuation of the inner and outer diameters of the high-pressure hose and the outer diameter of the skeleton layer, if the fluctuation range exceeds the allowable limit, it is impossible to ensure the balance of the crimping amount of the hose joint, which affects the quality of the hose assembly. Therefore, for the production of rubber hose assemblies, the inner and outer diameters of the skeleton layer will be strictly checked to ensure compliance with requirements, and the requirements for outer diameter errors can be appropriately relaxed.

2. Wall thickness error

Due to the eccentricity of the adhesive layer inside the high-pressure hose and the influence of the overlapping width of the adhesive layer between the skeleton layers, the wall thickness error of the hose may be too large. If the wall thickness error exceeds the allowable range, it will affect the sealing performance and anti pull ability of the joint, and may even cause corresponding deflection (head tilt) of the hose assembly joint.

3. Interlayer adhesion force

High pressure rubber hoses should have good integrity, that is, there should be high adhesion between each structural layer, and the bonding between each adhesive layer should form a whole. Only in this way can we adapt to various technical requirements during the installation and crimping process of the joint, ensuring the functionality of the hose assembly. Therefore, it is necessary to control the adhesion between the layers of the rubber hose to not be lower than the technical standard, and try to choose rubber hoses with high adhesion to produce the rubber hose assembly.

4. Appearance quality

It not only affects the appearance quality of the hose assembly, but also affects the quality of use. If there are bubbles, pores or mechanical damage in the outer rubber layer, it will expose the skeleton layer, cause corrosion of the skeleton layer, reduce the compressive strength of the hose, directly affect the service life of the hose assembly, and even cause accidents during use. Therefore, attention should be paid to the appearance quality of the hose and any appearance defects that may affect its overall performance should be eliminated.

The above are the production and testing precautions for high-pressure steel wire braided rubber hoses. When replacing high-pressure rubber hoses, the length, number of steel wire layers, joint shape and size of the selected hose should be reasonable, and bending should be minimized as much as possible; When tightening the joint nut, do not cause the hose to twist, excessive bending and twisting will greatly reduce its service life; Protective measures should be taken for parts that are prone to friction to prevent bursting due to wear and tear.