Ultrahigh-pressure release valve

Abstract

The invention relates to a pressure release valve, in particular an ultrahigh-pressure release valve with an aim to overcome defects and problems of complicated structure, leakage of pressure medium, high use and maintenance cost and difficulty in maintenance. The ultrahigh-pressure release vale comprises an ultrahigh-pressure one-way valve and a hydraulic cylinder used for driving opening and closing of the ultrahigh-pressure one-way valve, a flange cover plate is fixed on a cylinder barrel of the hydraulic cylinder, the flange cover plate and valve blocks on the ultrahigh-pressure one-way valve are fixed through bolts, and a piston rod of the hydraulic cylinder and the one-way valve are sealed by a pressure plate and sealing rings. A valve seat and a valve spool are additionally arranged on the ultrahigh-pressure one-way valve. By modifying the connecting structure between the ultrahigh-pressure one-way valve and the hydraulic cylinder, the sealing structure among the piston rod of the hydraulic cylinder and control holes, and the structure of the ultrahigh-pressure one-way valve, the defects and problems existing in products of the prior art are overcome, and the pressure release valve is reasonable and unique in the modified structure, modified products are compact in structure, excellent in performance and more reliable in use and service lives are prolonged.

Description

technical field [0001] The invention relates to a pressure relief valve, in particular to an ultra-high pressure pressure relief valve. Background technique [0002] The ultra-high pressure relief valve is a crucial component in the ultra-high pressure equipment container, and it is also a component with a high failure rate. The ultra-high pressure relief valve includes an ultra-high pressure check valve and a hydraulic cylinder for driving the ultra-high pressure check valve to open and close. The ultra-high pressure check valve includes an upper valve block and a lower valve block. The upper valve block and the lower valve block are sealed and fastened together by locking bolts to form a valve body. The upper valve block and the lower valve block are respectively opened with valves communicating with each other. Usually, one end of the valve hole on the upper valve block is used as the pressure fluid inlet, and one end of the valve hole on the lower valve block is used as...

AI Technical Summary

Problems solved by technology

[0003] The existing ultra-high pressure pressure relief valve has the following defects and problems: 1. The connection structure between the hydraulic cylinder and the ultra-high pressure check valve is not reasonable, resulting in a complex structure

2. The sealing structure between the control hole and the piston rod is unreasonable, which may easily cause leakage of the pressure medium

3. Due to the vulnerability of the return spring of the ultra-high pressure check valve, the check valve often fails to work normally, which affects the service life of the check valve and the pressure relief valve

The sealing ball directly forms a sealing pair with the valve hole port on the lower valve block. Once the sealing pair is damaged, the entire valve body of the ultra-high pressure check valve is generally damaged, which is equivalent to the scrapping of the entire check valve or pressure relief valve. Such use and maintenance High cost and maintenance difficulty

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