Plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group

Abstract

The invention discloses a plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group. The plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group comprises a valve block, a one-way valve, two electromagnetic valves and four hydraulic control one-way valves. The valve block is provided with a port P, a port T, a port A and a port B. The inlet of the one-way valve communicates with the port P. A first electromagnetic valve is provided with a first port, a second port and a third port, the third port communicates with the port P, and the first port communicates with the port T. A second electromagnetic valve has the same structure as the first electromagnetic valve and is provided with a fourth port, a fifth port and a sixth port. The inlets of a first hydraulic control one-way valve and a second hydraulic control one-way valve respectively communicate with the port A and the port B, the outlets communicate with the outlet of the one-way valve, and pilot ports respectively communicate with the fifth port and the second port. The inlets of a third hydraulic control one-way valve and a fourth hydraulic control one-way valve communicate with the port T, the outlets respectively communicate with the port A and the port B, and the pilot ports respectively communicate with the second port and the fifth port. According to the plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group, the valve group can realize the three-position four-way reversing function with zero leakage and small volume.

Description

technical field [0001] The invention relates to a plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group. Background technique [0002] The hydraulic solenoid directional control valve is the most common directional control element in both the industrial field and the construction machinery industry. So far, the electromagnetic directional control valve has been developed for decades, and its functions are also all-encompassing. The working conditions can be satisfied, what's more, after long-term development and revision, the electromagnetic reversing valve has already been standardized and serialized, and has been widely used in the hydraulic industry. However, the development of any component has its limitations. The conventional electromagnetic reversing valve mainly has two limiting factors. One is affected by its own structure, mainly because the valve core generally adopts a slide valve structure, which makes the internal leakage of t...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that the electromagnetic reversing valve in the prior art is difficult to take into account both zero leakage and small volume, and to provide a plate-mounted zero-leakage three-position four-way electromagnetic reversing valve group that can solve the above problems

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