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Load-sensitive electro-hydraulic proportional multi-way valve

A load-sensing, electro-hydraulic proportional technology, applied in the field of multi-way valves, can solve problems that are difficult to realize, and achieve the effects of reducing pollution, reducing pipeline connections, and improving control accuracy

Inactive Publication Date: 2013-04-17
XUZHOU CONSTR MACHINERY INST XUZHOU CONSTR MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the advancement of science and technology and people's higher and higher requirements, manual valves and electromagnetic reversing valves can no longer meet people's requirements; in addition, when the actuator has precise micro-movement requirements, the above scheme is obviously difficult to achieve

Method used

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  • Load-sensitive electro-hydraulic proportional multi-way valve

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with accompanying drawing.

[0011] Such as figure 1 As shown, a load-sensitive electro-hydraulic proportional multi-way valve includes a safety valve 1, a first pilot electro-hydraulic proportional pressure reducing valve 2, a second pilot electro-hydraulic proportional pressure reducing valve 5, and a first load-sensitive pressure compensation valve 3 , the first joint composed of the first hydraulically controlled reversing main valve 4 and the overload oil supplement valve 14, the third pilot electro-hydraulic proportional pressure reducing valve 6, the fourth pilot electro-hydraulic proportional pressure reducing valve 9, and the second load-sensitive pressure compensation Valve 7, internal pilot oil inlet valve 8, float control solenoid valve 10, second hydraulic control reversing main valve 11, float valve 12 and LS shuttle valve 13; the oil inlet of safety valve 1, the first The load-sensing p...

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Abstract

The invention discloses a load-sensitive electro-hydraulic proportional multi-way valve and belongs to the technical field of multi-way valves. The load-sensitive electro-hydraulic proportional multi-way valve comprises a first tandem and a second tandem. The first tandem is composed of a safety valve (1), a first pilot electro-hydraulic proportional relief valve (2), a second pilot electro-hydraulic proportional relief valve (5), a first load-sensitive pressure compensation valve (3), a first hydraulic reversing master valve (4) and an overload makeup valve (14). The second tandem is composed of a third pilot electro-hydraulic proportional relief valve (6), a fourth pilot electro-hydraulic proportional relief valve (9), a second hydraulic reversing master valve (11), a floating valve (12) and an LS (load-sensitive) shuttle valve (13). The load-sensitive electro-hydraulic proportional multi-way valve is capable of simultaneously receiving single or multiple control command signals to respectively control output oil circuits of the multi-way valve and is easy for remote control and complex compound action of multiple actuators, energy resources are saved, and environment pollution is reduced.

Description

technical field [0001] The invention relates to a multi-way valve, in particular to a load-sensitive electro-hydraulic proportional multi-way valve. Background technique [0002] The multi-way reversing valve is a combined valve with two or more reversing slide valves as the main body. This product can be widely used in various construction machinery, agricultural machinery and mining machinery, such as in loaders, to control its boom lifting and bucket flipping and other actions. There are at least two actuators to be controlled by the multi-way reversing valve. Since the loads of the actuators are different, and the oil source is configured according to the sum of these load powers, when only one actuator acts or the actuator speed is low , the excess oil can only be unloaded under high pressure, resulting in a large power loss and a large amount of heat, which is extremely unfavorable to the life of the system and components. In recent years, people have higher and high...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 肖刚王钦刘莹莹
Owner XUZHOU CONSTR MACHINERY INST XUZHOU CONSTR MACHINERY GRP
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