Emergency repair of the hottest hydraulic hose

2022-09-20
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Emergency repair of hydraulic hose

during construction, when the rubber hose of the hydraulic system of construction machinery breaks, the following emergency repair methods can be adopted

sticking method

when the pressure of the hydraulic system is When the rubber hose between 0mpa breaks, the sticking method can be adopted: the closed-loop control is really realized at the broken part of the hose, and the surrounding is wiped clean at the bottom of the system; Apply one of "anaerobic" glue, "epoxy" glue, "801" glue or "502" glue on the broken part of the hose (the length of the glue is about times the length of the broken part); Wrap the glue coating layer with adhesive tape or canvas strip in a superimposed manner (each layer should be coated with glue); Tie both ends of the winding tape and the sail tape into a knot; It can be used after it solidifies for min

bundling method

bundling method is applicable to the emergency repair of rubber hose rupture with a pressure of 16m, especially for the elderly below PA. The specific method is as follows: apply one of the commonly used adhesives for construction machinery on the broken part of the hose; Wrap the coating layer with oil resistant rubber whose width is times the length of the broken part (each layer should be coated with glue); Use No. 12 iron wire to bind the oil-resistant rubber with good square arrow during winding inspection; Let it solidify

bone joining method

when the broken part of the rubber hose is large or about to break due to the action of external force (fragment breakdown, extrusion fracture) or system overload, bone joining method can be adopted: wipe the broken part of the hose and remove the broken part; Insert the self-made steel "bone connector" into the cut-off hose ("bone connector" parts are shown in the attached figure. In case of special emergency, steel pipes with the same outer diameter as the hose bone diameter can also be used as "bone connector"); Use the self-made steel plate clip to clamp the hose and "connector" (in case of special emergency, No. 8 iron wire can be used to replace the self-made steel plate clip); Clean the connected hose and then use it

transposition method

in the hydraulic system, the rubber hoses of the same oil circuit have the same specifications, but bear different oil pressures. Most of the broken hoses are those that bear high oil pressure. For example, among the two oil pipes with the same specification on the boom cylinder of W-type excavator and ZL series loader, the oil pipe connected to the large cavity of the boom cylinder always bears a large oil pressure. Therefore, the transposition method can be adopted: simply stick or bind the broken rubber hose; Poor contact between the large chamber of the boom cylinder and the sensing line: the oil pipes in the small chamber of the sensor line after pulling out the controller can be used interchangeably (that is, the unbroken oil pipe can bear high pressure, and the damaged oil pipe that has been simply bonded or bundled can bear low pressure)

restructuring method

because the pipe joints of each rubber hose in the hydraulic system are different, and at the same time, the high-pressure or ultra-high-pressure broken hose should not adopt the "sticking method", "binding method" or "bone connecting method". Therefore, the restructuring method can be adopted: saw off the pipe joints of the broken hose; Find a replacement hose with a pressure bearing capacity and length similar to the broken hose, and saw off its pipe joint; Weld the angle of the pipe joint of the broken hose to the replacement hose; After cleaning the welded hose, it can be used

open circuit method

in the hydraulic system of construction machinery, some oil circuits play a role in protecting the safety of the system. For example, the oil circuit from the main oil circuit to the oil tank through the overflow valve in the steering system of W-type excavator and ZL series loader; The safety valve, overload valve, overflow valve and other oil circuits in the hydraulic system of ty120 bulldozer working device. When the rubber hose in these oil circuits breaks, the open circuit method can be adopted; Abandon the protective devices (such as "safety valves") in the oil circuit; Block the oil circuit leading to the broken hose and make the oil circuit open. When adopting the open circuit method, the system load should be controlled between 85%-95% of the rated load

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