Hose products are one of the most commonly used accessories in daily industry, but there will also be various problems during use, especially under high pressure working conditions of high pressure hoses. After many years of work experience and user feedback to understand the reasons
 

1. The reinforced layer of the hose is not rusted, but the wire breaks irregularly. If the hose is cracked, the outer layer is stripped and the reinforcement layer is not found to be rusty, but irregular broken wires appear in the length direction of the reinforcement layer. The main reason is that the hose is subject to high-frequency impact.
 

2. Due to the external force (shraps, crush breaks) or the system overload caused the high-pressure hose breakage to be large or about to break, the bone connection method can be adopted: wipe the hose breakage clean and cut off the breakaway area; Steel "bone joint" is inserted into the cut off hose (when the situation is particularly urgent, a steel pipe with the same outer diameter as the hose bone diameter can also be used as "bone joint"); the homemade steel plate clamp is used to clamp the hose and "bone joint" Tight (in special emergency situations, you can replace the self-made steel clamps with 8 # iron wire); clean the connected hose and use it
 

3. The hose is broken, and the braided steel wire near the break is rusted. If the high-pressure oil pipe is cracked, the outer rubber layer is stripped and inspected to find that the braided and wound steel wire near the breach has rust. This is mainly due to the effect of the wet or corrosive material on the outer rubber layer, which weakens the strength of the hose and causes it to rupture at high pressure.
 

When this happens, the outer layer is usually accompanied by fracture, abrasion or severe deterioration, which causes the outer layer to lose its protective effect on the reinforcing layer. At this time, the mechanical damage, chemical corrosion and high temperature baking of the outer rubber layer must be checked and eliminated before replacing the rubber tube. However, there is also a case where the outer rubber layer is maintained well but the layered embroidery is broken and the rupture is usually within 200 mm from the hose joint. The reason is mostly that the hydraulic joint is unqualified. Because moisture enters the inner edge of the jacket, The reinforcement layer absorbs moisture, which causes the compressive strength of the hose to decrease and rupture due to rust.
 

Note: The hose arrangement should be as far as possible from heat sources and away from the manifestation of the engine exhaust pipe. If necessary, equipment such as casings or maintenance screens can be used to prevent the hose from being deformed by heat. Hose equipment should be kept under tension. Even if the two ends of the hose are not relatively moved, the hose must be loose. The tensioned hose will swell under pressure and the strength will decrease. Do not misunderstand the hose during the equipment process. Slim changes to the hose can reduce its strength and loosen the joint. When drilling high pressure hose equipment for oil drilling, the joint should be tightened to the hose instead of the joint. If the hose is equipped on a vital part, it is advisable to check or replace it on time. Where hoses need to be inserted or can be in conflict with the appearance of machinery during operation, maintenance equipment such as hose clamps or springs are used to prevent damage to the outer layer of the hose. When it is necessary to bend the hose, the zigzag radius should not be too small, it should be greater than 9 times the outer diameter. There should be a straight section at the joint between the hose and the joint that is greater than 2 times the outer diameter of the pipe. Also recommended specifications for high pressure hoses commonly used in coal mines