Cantilever crane motion hydraulic system and tunnel lagging jack operating vehicle

Abstract

The invention discloses a cantilever crane motion hydraulic system. The cantilever crane motion hydraulic system is used for controlling the motion of a cantilever crane and comprises a driving oil cylinder, a throttle valve, a switch valve, a reversing valve, an oil pump and an oil tank, wherein the driving oil cylinder is connected with a to-be-controlled cantilever crane; the throttle valve is communicated to a rodless cavity of the driving oil cylinder; the switch valve is communicated to the throttle valve; a main oil inlet P, a main oil return hole T, a working oil inlet A and a working oil return hole B are formed in the reversing valve, the reversing valve has a middle-position oil return function, the working oil inlet A and the working oil return hole B of the reversing valve are respectively communicated with a rod cavity of the driving oil cylinder and the switch valve, and the reversing valve is used for carrying out communication, cut-off, reversing, pressure release and sequential motion control of an oil path in the cantilever crane motion hydraulic system; the oil pump is communicated to the main oil inlet P of the reversing valve; and the oil tank is communicated to the oil pump and the main oil return hole T of the reversing valve. The invention further provides a tunnel lagging jack operating vehicle. According to the cantilever crane motion hydraulic system and the tunnel lagging jack operating vehicle, the power consumption can be effectively reduced, the control is convenient, furthermore, the structure is simple, and the failure rate is low.

Description

technical field [0001] The present invention relates to the field of engineering machinery, and more specifically relates to a hydraulic system for actuating a boom and a tunnel arch operating vehicle. Background technique [0002] The tunnel arch operation vehicle is generally controlled by a hydraulic or electric system with multiple hydraulic cylinders. A work platform is set on the hydraulic cylinder, and the hydraulic cylinder drives the work platform to lift up and down. The operator stands on the work platform for tunnel arch construction or other high-altitude operations. a vehicle. The tunnel arch operation vehicle is a relatively advanced construction machinery and equipment in contemporary times. With the help of the tunnel arch operation vehicle, the operator can be lifted to a certain height, so as to conveniently realize the problem of high-altitude production operations. With the development of modern science and technology, the research and development of tu...

AI Technical Summary

Problems solved by technology

Under normal circumstances, the boom 2 can be retracted by means of the main power device. However, once the main power device loses power, the boom 2 cannot be driven normally, which greatly affects the normal operation of the tunnel arch truck.

In order to enable the boom 2 to be lowered or retracted when the main power device loses power, in the prior art, an emergency boom operation hydraulic system is generally added to the tunnel arch work vehicle, but the existing emergency boom movement The power consumption of the hydraulic system is relatively large, and it is necessary to install a large number of batteries on the tunnel arch operation vehicle or to find an external power supply, which is not conducive to the control of the lowering or retraction of the tunnel arch operation vehicle boom; at the same time, the existing emergency boom operation hydraulic system Many hydraulic components are used, and the structure is complex, which is easy to cause failure

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