Sequence valve

Abstract

The invention discloses a sequence valve, and belongs to the field of hydraulic machinery. The sequence valve comprises a valve body with a first cavity in an axial direction, springs which are arranged in the first cavity in sequence from top to bottom and abutted against one another, a plunger used for connecting and disconnecting, a first opening plunger and a second opening plunger. The left side wall of the valve body and the right side wall of the valve body are each provided with a first oil passing opening and a second oil passing opening which are communicated with the first cavity. The springs are always in a compression state. The plunger used for connecting and disconnecting can slide along the inner wall of the first cavity in a sealing mode, and is used for blocking and communicating the first oil passing opening and the second oil passing opening. A first annular groove is arranged in the outer wall of the lower end of the first opening plunger, the first annular grooveis communicated with the first oil passing opening through a first passage arranged on the valve body. A second annular groove is arranged in the outer wall of the lower end of the second opening plunger, and the second annular groove is communicated with the second oil passing opening through a second passage arranged on the valve body. The first opening plunger and the second opening plunger canslide along the inner wall of the first cavity in a sealing mode.

Description

technical field [0001] The invention relates to the field of hydraulic machinery, in particular to a sequence valve. Background technique [0002] The sequence valve is a kind of pressure control valve. Its main function is to use the pressure as the control signal to automatically connect or cut off a certain oil circuit under the action of a certain control pressure. With the rapid development of science and technology, petroleum machinery, petroleum equipment and other industries use hydraulic control technology to carry out difficult and high-precision operations. Among them, the hydraulic cylinder is an essential device for implementing hydraulic control technology. When hydraulic control technology is used to carry out a job, usually multiple hydraulic cylinders are required to cooperate with each other, wherein each hydraulic cylinder is assigned a different task and operates in a certain sequence. At present, pipelines are usually connected between adjacent hydraul...

AI Technical Summary

Problems solved by technology

[0005] Since the one-way sequence valve has the characteristics of smooth reverse and no pressure difference, when controlling multiple hydraulic cylinders to lift and reset in sequence, one-way sequence valves need to be connected in series in the forward and reverse directions of the pipeline, which not only increases the The risk of pipeline leakage, but also increased operating time and labor intensity

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