Emergency method for hydraulic hoses in pressurized openings

The mechanical components of hydraulic hoses include connected circuits, pumps, valves, filters, hoses, metal hoses, and other suitable parts. The variety and structure of rubber hoses are complex, and the usage conditions vary. Therefore, the service life of rubber hoses is not only determined by the quality, but also by proper use and maintenance. So even if the product has extremely high quality, if it cannot be used and maintained correctly, it will seriously affect its quality of use and lifespan.

In high-pressure drilling projects, if there is oil leakage or seepage in the high-pressure rubber hose used, the following emergency methods can be used:

1. Reform Law

Due to the differences in the pipe joints of various rubber hoses in hydraulic systems, and the unsuitability of using "adhesive repair method", "bundling method" or "bone joining method" for high-pressure or ultra-high pressure ruptured hoses, a modification method can be adopted: sawing off the pipe joints of the ruptured hose; Find a replacement hose with similar pressure capacity and length to the ruptured hose, and saw off its pipe joint; Weld the angle of the broken hose joint onto the replacement hose; After cleaning the welded hose, it can be used.

2. Bone setting method

When the rubber hose ruptures or is about to break due to external forces (such as shrapnel breakdown or compression rupture) or system overload, the bone joining method can be used: wipe the ruptured part of the hose clean and cut off the ruptured part; Insert the homemade steel "bone connector" into the cut hose and clamp the hose and "bone connector" tightly with a homemade steel plate clip (in case of special emergency, an 8-gauge iron wire can be used instead of the homemade steel plate clip); After cleaning the connected hose, it can be used.

3. Binding method

The bundling method is applicable for emergency repair of rubber hose rupture with a pressure below 16MPa. The specific method is to apply one of the commonly used adhesives for construction machinery on the ruptured part of the hose; Wrap 2-3 layers of oil resistant rubber with a width 2-3 times the length of the ruptured area (each layer should be coated with adhesive); Tie the wrapped oil resistant rubber with a No. 12 iron wire; Wait for it to solidify.

4. Circuit breaking method

In hydraulic systems of construction machinery, some oil circuits play a role in protecting system safety. When the rubber hoses in these oil circuits rupture, a circuit breaker method can be used; Abandon the protective devices (such as "safety valves") in the oil circuit; Block the oil circuit leading to the ruptured hose, causing the circuit to break. When using the circuit breaker method, the system load should be controlled between 85% and 95% of the rated load.

5. Adhesive repair method

When a rubber hose with a pressure between 25-8.0 MPa in the hydraulic system ruptures, the adhesive repair method can be used: wipe the area around the hose rupture clean; Apply one of "anaerobic" adhesive, "epoxy resin" adhesive, "801" adhesive, or "502" adhesive to the ruptured part of the hose (the length of the adhesive applied is about 2-3 times the length of the ruptured part); Wrap 4-5 layers of adhesive tape or canvas strips in a stacked manner around the adhesive coated area (each layer should be coated with adhesive); Tie the two ends of the sail cloth strip wrapped with adhesive tape into a knot; After it solidifies for 15-20 minutes, it can be used.

6. Transposition method

In hydraulic systems, rubber hoses of the same oil circuit have the same specifications but can withstand different oil pressures. Most ruptured hoses are hoses that withstand high oil pressure. Based on this, the transposition method can be adopted: simple adhesive repair or binding can be applied to the ruptured rubber hose; Swap the oil pipes at the inlet and outlet for use.

In short, the above methods are all emergency measures in case of emergencies. High pressure rubber hoses will inevitably lose their original performance indicators. Therefore, they should be replaced after drilling to keep the equipment in good condition. In practical applications, it is necessary to avoid the situation of hose rupture and to conduct frequent inspections and maintenance.