Quick restart parking valve assembly

Abstract

A shutdown valve assembly capable of being restarted fast comprises a shutdown valve body, a guide valve body, a regulating valve plate set, a solenoid valve and a wave-shaped spring. The shutdown valve assembly is characterized in that the regulating valve plate set is composed of an operating valve plate, a planar spring, a balance valve plate, a connecting sleeve and a sealing gasket. The shutdown valve assembly has the advantages that the mass and the size can be effectively reduced, the movement flexibility of the control part can be improved, the control part can stably work for a long time, and the service life can be prolonged.

Description

technical field [0001] The invention relates to a parking valve, in particular to a quick restart parking valve assembly. Background technique [0002] In the prior art, a relatively common quick restart stop valve assembly structure is as follows: figure 1 As shown, its main components include parking valve body, pilot valve body, regulating valve group (the regulating valve group consists of multiple valves), solenoid valve and wave spring. The working principle of the quick restart parking valve assembly is: When the solenoid valve is not energized, the regulating valve plate group is still at the maximum stroke position to the left under the elastic force of the wave spring. At this time, the oil outlet chamber and the oil inlet chamber are isolated from each other. Down, the regulating valve plate group moves to the right against the elastic force of the spring, and the oil outlet chamber and the oil inlet chamber communicate with each other. [0003] The problem with...

AI Technical Summary

Problems solved by technology

[0003] The problem with the aforementioned structure is that since the regulating valve group needs to rely on the guide valve body to realize the guidance when it moves, a small gap must be used between the outer periphery of the regulating valve group and the inner wall of the guiding valve, which has a negative effect on the regulating valve group and the inner wall of the guiding valve. The processing accuracy of the pilot valve body puts forward higher requirements, and the processing is more difficult; in addition, because the gap between the regulating valve plate group and the pilot valve body is very small, it is very sensitive to the cleanliness of the environment, and the quick restart of the parking valve is long-term. After work, the impurities in the fuel and the impurities formed by the long-term wear of the moving parts will be deposited inside the quick restart parking valve, which will cause the regulating valve group to move poorly and easily get stuck, and indirectly shorten the quick restart valve. Service life of start stop valve

Images