Hydraulic control system for folding arm-type overhead working truck

Abstract

The invention discloses a hydraulic control system for a folding arm-type overhead working truck. The hydraulic control system for the folding arm-type overhead working truck comprises a pump group, an upper truck control multi-way valve, a lower truck control multi-way valve and a bypass throttle valve group; the lower truck control multi-way valve comprises a two-position three-way valve, a liquid-controlled overflow valve and a supporting leg control valve; a pilot oil way of the liquid-controlled overflow valve is communicated with the upper truck control multi-way valve; the supporting leg control valve distributes hydraulic power which is provided by the pump group to different lower truck actuating components. The hydraulic control system for the folding arm-type overhead working truck has the beneficial effects that: 1, the overall system is divided into two parts, i.e., an upper truck control system and a lower truck control system through a two-position three-way reversing valve, so that the lower truck control system and the upper truck control system realize an interlocking function, when an upper truck works, a lower truck cannot work, and when the lower truck works, the upper truck cannot work either; 2, a bypass throttle valve is arranged at each of a turntable and a working platform by utilizing a bypass throttling control mode, so that a worker can control the speed of an upper truck system conveniently when the turntable and the working platform operate, and the control cost of the system is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-altitude operation vehicles, and in particular relates to a hydraulic control system of a folding-arm type high-altitude operation vehicle, and is particularly suitable for a hydraulic control system of a low-cost folding-arm type high-altitude operation vehicle. Background technique [0002] Aerial work vehicle refers to a special vehicle for transporting staff and equipment to the scene and performing aerial functions. In order to facilitate the use of the staff, control devices are usually installed on the working platform of the aerial work vehicle and when the vehicle is dismounted. [0003] The patent CN87215075 is a control oil circuit of an aerial work vehicle, which provides a hydraulic control system that can be operated on and off the aerial vehicle. The manual multi-way valve used in this system has a simple structure and poor speed regulation. , The unloading oil circuit returns to the ...

AI Technical Summary

Problems solved by technology

However, because the three-way electric proportional speed regulation needs to be controlled by an electric control handle and a controller or an amplifier board, the cost is relatively high

Images