Ultrahigh pressure check valve

Abstract

The invention discloses an ultrahigh pressure check valve which comprises a reset spring and a steel ball, the reset spring and the steel ball are arranged in a valve body hole fluid channel and connected with a valve element, wherein the reset spring (2) is clamped on a step hole of an assembly channel of the valve body (1), one end of the valve element (3) jacks to the reset spring (2), a spherical groove in one end presses the steel ball (4), a step threaded hole of a threaded connection inlet connector (6) is formed in the valve body at the rear end of the steel ball (4), a medium flow pass stop block (5) which protrudes out of an end surface is arranged at a shaft end of the inlet connector (6), and the steel ball (4) presses into a groove in a front end outlet of the medium flow pass stop block (5). According to the ultrahigh pressure check valve, the steel ball presses a conical cushion groove so as to realize a one-way sealing effect. The ultrahigh pressure check valve can be mounted on an ultrahigh pressure pipeline alone, and the problems that the size is larger and the reliability, the maintainability, the safety and the sealing performance are poor and universal in integrated valve groups are solved.

Description

technical field [0001] The invention relates to an ultra-high pressure oil-water one-way valve whose working pressure can reach 2MPa-300MPa. Background technique [0002] The function of the one-way valve is to only allow the oil to flow in one direction, and to stop in the reverse direction. The ultra-high pressure check valve is one of the most commonly used components in the ultra-high pressure hydraulic system. Its function is to check the fluid and protect the hydraulic circuit. The ultra-high pressure check valve is normally closed. Due to the pressure of the medium at the inlet end of the pipeline, the valve is opened by overcoming the resistance of the spring. When the medium pressure at the inlet end is lower than that at the outlet end, the spring presses the valve core against the steel ball to close the valve, preventing the medium from flowing backward and acting as a check. Ultra-high pressure check valve oil field special valve is generally installed vertic...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, there is no separate structure on the ultra-high pressure check valve, because the ultra-high pressure design is usually inserted in the domestic structure, and the valve body is an integrated structure. The layout of the ultra-high pressure oil system is extremely complicated, the processing of the valve body is difficult, the manufacturing cost is high, and the maintenance is difficult

In the prior art, in order to ensure usability, the volume of the valve body is often designed too large

This kind of ultra-high pressure check valve with integrated design seems simple, but it is actually complicated, and the installation is troublesome, and the processing requirements are relatively high.

Moreover, the integrated structure of the valve body is easy to cause the return spring to break, the gas or liquid to flow in reverse, the valve core is easily stuck in the fully open position due to dirt, gas or liquid leakage, low reliability, and prone to safety hazards

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