Constant-specific-pressure large-flow safety valve

Abstract

The invention discloses a constant-specific-pressure large-flow safety valve. The constant-specific-pressure large-flow safety valve comprises a valve body, a floating valve seat and a valve element assembly; a valve cavity is formed in the valve body, a liquid inlet communicating with the valve cavity is formed in a first end of the valve body, a liquid passing hole communicating with the valve cavity is formed in the peripheral wall of the valve body, and a first boss is arranged on the inner peripheral face of the valve body; the floating valve seat is arranged in the valve cavity in a matched mode and can move in the axial direction of the valve body, the floating valve seat is provided with a floating cavity, one end of the floating cavity communicates with the valve cavity, and the other end of the floating cavity can be disconnected from and communicate with the valve cavity; and the valve element assembly is arranged in the valve cavity in a matched mode and located between thefloating valve seat and a second end of the valve body, and the valve element assembly can move in the axial direction of the valve body so as to achieve disconnection and communication of the otherend of the floating cavity and the valve cavity. According to the constant-specific-pressure large-flow safety valve, the problem that sealing force fluctuates along with fluctuation of liquid pressure can be solved, stability is good, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of safety valves, in particular to a constant pressure and large flow safety valve. Background technique [0002] The safety valve is an automatic pressure relief device driven by medium pressure. It is mostly used in the lower chamber of the column, the upper and lower chambers of the balance jack, the piston chamber or piston rod chamber of the push jack, etc. [0003] With the large-scale implementation and development of fully mechanized hydraulic supports in coal mines, the performance of the safety valve directly affects the normal operation of the hydraulic support and the safety of personnel, especially for the service life and reliability of the safety valve. When the pressure from the top of the hydraulic support causes a passive force, the safety valve needs to unload in a short time in a timely, sufficient and stable manner under high pressure to ensure the service life of the support and the saf...

AI Technical Summary

Problems solved by technology

[0007] For this reason, the embodiments of the present invention propose a constant specific pressure and large flow safety valve, which can reduce the problem of fluctuations in sealing force caused by liquid pressure fluctuations, and can improve the constant specific pressure and large flow rate. Stability and reliability of the flow safety valve at work

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