multi-way valve

Abstract

The invention relates to a multi-way reserving valve, and aims to solve the problem that an energy saving effect of the existing multi-way reversing valve in a hydraulic system is not obvious. The invention provides the multi-way reserving valve; a P1 oil port is connected with a first reversing module and a first oil cavity of a hydraulic control one-way valve; a P2 oil port is connected with a second reversing module and a second oil cavity of the hydraulic control one-way valve; a spring cavity of the hydraulic control one-way valve is connected with three oil ways which are respectively connected with a second oil inlet of a three-position four-way valve, is in linkage with a first switching valve through a reversing valve of the first reversing module, is in linkage with a second switching valve through a reversing valve of a second reversing module, and is connected with a loop of an oil tank; the first oil cavity of the hydraulic control one-way valve is connected with a control port and an oil inlet of the two-position two-way reversing valve; an oil outlet of the two-position two-way reversing valve is connected with a loop of the oil tank through a first damping hole; a third control port of the three-position four-way valve is connected with an outlet of the two-position two-way reversing valve; a P2 oil port is connected with a second control port and is simultaneously connected with the first oil inlet; the first oil inlet and the second oil outlet are simultaneously connected with the loop of the oil tank.

Description

technical field [0001] The present invention relates to a hydraulic valve, more specifically, to a multi-way reversing valve. Background technique [0002] At present, the multi-way valves commonly used in construction machinery, especially loaders, include open center multi-way valves and closed center multi-way valves. Among them, the open center multi-way valves are throttling and speed-regulating types, with mature technology and simple structure. Its technical characteristics, its energy consumption is relatively high, and its controllability is poor; in addition, the closed center multi-way reversing valve changes the throttling and speed regulation characteristics of the open center system, and realizes the flow on demand through the displacement change of the variable pump. supply, reducing the throttling loss. At the same time, in order to achieve good control performance, the method of pressure compensation is currently used to realize the action coordination of mu...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a multi-way reversing valve with obvious energy-saving effect and good controllability in the hydraulic system for the problem that the existing multi-way reversing valve has no obvious energy-saving effect or poor controllability in the hydraulic system. Directional valve

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