High-pressure slide valve type check valve

Abstract

The invention belongs to the technical field of one-way hydraulic valves, and particularly relates to a high-pressure slide valve type check valve. According to the technical scheme, the high-pressureslide valve type check valve includes a valve body (3), a valve core (4), a spring (6), a left valve cover (1) and a right valve cover (8); the left valve cover (1) and the right valve cover (8) areinstalled on the corresponding left end and the corresponding right end of the valve body (3) through bolts (16), the valve body (3) is internally provided with the valve core (4) and the spring (6),one end of the spring (6) is in contact with the right valve cover (8), the other end of the spring (6) is in contact with the right end of the valve core (4); a first combined seal ring (11) is installed on the right cylindrical surface of the valve core (4), a second combined seal ring (13) is installed at the position, close to the right, of the middle part of the inner wall of the valve body (3), and a third combined seal ring (14) is installed on the left cylindrical surface of the valve core (4); and a left seal ring (2) and a right seal ring (7) are correspondingly installed on the leftend surface and the right end surface of the valve body (3). The high-pressure slide valve type check valve has the characteristics of no hydraulic and mechanical impact, tight sealing, good stability and long service life.

Description

technical field [0001] The invention belongs to the technical field of one-way hydraulic valves. In particular, it relates to a high-pressure slide valve type check valve. Background technique [0002] At present, check valves are commonly used in hydraulic systems, and their spool structures are mostly conical or spherical. Most of the existing check valve spools and valve seats are in line contact, which is prone to spool misalignment, and Due to frequent opening and closing and vibration, the joints are easy to wear and tear, resulting in grooves, which affect the sealing performance, make the one-way valve work unstable, and reduce the service life. And because the hydraulic system is in high-frequency vibration, the check valve is also in high-frequency vibration at this time, which makes the valve core and the valve seat produce impact, thereby increasing the vibration and noise of the hydraulic system and affecting the working performance of the hydraulic system. To...

AI Technical Summary

Problems solved by technology

[0002] At present, check valves are commonly used in hydraulic systems, and their spool structures are mostly conical or spherical. Most of the existing check valve spools and valve seats are in line contact, which is prone to spool misalignment, and Due to frequent opening and closing and vibration, the joints are easy to wear and tear, resulting in grooves, affecting the sealing performance, making the one-way valve unstable and reducing the service life

And because the hydraulic system is in high-frequency vibration, the one-way valve is also in high-frequency vibration at this time, which makes the valve core and the valve seat produce impact, thereby increasing the vibration and noise of the hydraulic system and affecting the working performance of the hydraulic system.

To open the high-pressure check valve, a small unloading valve needs to be added, which makes the structure of the high-pressure check valve more complicated.

[0003] From the current research situation, it is found that many scholars use software such as fluent to simulate the flow of the check valve, and make some improvements to the structure, which effectively solves the shortcomings of loud noise, easy jamming, and poor opening speed. However, the valve core structure Most are still spherical or conical

"A hydraulically controlled one-way valve (CN209725330)" discloses a hydraulically controlled one-way valve with an improved structure, which improves the contact performance between the spherical surface and the through hole, but the sealing performance still needs to be improved; "Ultra-high pressure hydraulically controlled one-way valve Directional valve (CN209469836U) " discloses a kind of one-way valve that works under ultra-high pressure, is provided with a kind of piston that can be driven by liquid, can assist ball core motion; " a kind of high-pressure one-way valve ( CN209761891U)" discloses a check valve controlled by an electromagnet, which improves the automatic control level of the check valve, and has the characteristics of not being affected by oil return back pressure, fast response speed and no need to control the oil circuit

However, in the above-mentioned technologies, the valve core is a spherical or conical structure, and the connection between the valve core and the valve seat is still in line contact. Under mechanical impact and hydraulic impact, it is easy to cause wear on the contact surface, poor sealing performance, and shorten the service life.

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