Handle pilot valve capable of improving excavator inching operation

Abstract

The invention relates to a handle pilot valve capable of improving excavator inching operation. The handle pilot valve comprises an operating handle, and a pressure plate is connected on the operating handle and is simultaneously arranged on a universal joint. The handle pilot valve is characterized by further comprising two-stage linear pressure reducing valves, the operating handle controls open or close of the two-stage linear pressure reducing valves through the pressure plate, and a connector board is connected on the two-stage linear pressure reducing valves. The handle pilot valve has the advantages that mechanical handling performance is improved, the labor intensity of handlers is relieved, main power elements are piloted, the excavator inching operation is improved, and the handle pilot valve is convenient to mount, use and maintain, wide in application and the like. The two-stage linear pressure reducing valves are integrated in a valve body, the valve body is connected with the connector board, and the two-stage linear pressure reducing valves are connected with a high-pressure oil inlet cavity, a pressure reducing oil cavity and an oil return cavity.

Description

technical field [0001] The invention relates to a handle pilot valve capable of improving the inching operation of an excavator, belonging to the technical field of control valves. Background technique [0002] The handle pilot valve is mainly used to control the oil circuit of the pilot control system in the hydraulic system of construction machinery such as excavators. The oil source valve provides the working pressure of the oil circuit of the pilot system, controls the direction of the oil circuit of the entire pilot system, and controls the main valve to realize the corresponding distribution of the actuators. Action or combined action is an important part of the pilot control system. On walking construction machinery or high-pressure, large-flow hydraulic control machinery, in order to improve the maneuverability of the machinery and reduce the labor intensity of the operator, the main power element adopts pilot control, thereby improving the micro-operation of the exc...

AI Technical Summary

Problems solved by technology

On walking construction machinery or high-pressure, high-flow hydraulic control machinery, in order to improve the maneuverability of the machinery and reduce the labor intensity of the operator, the main power element adopts pilot control, thereby improving the micro-operation of the excavator. The output pressure of the handle pilot valve is proportional to a straight line, the control accuracy of the assembly is low, the micro-operation performance is poor, and the operator's labor intensity is high

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