CN-122014884-A - Resonance eliminating structure for gas one-way valve

Abstract

The invention provides a resonance elimination structure of a one-way valve of a gas pipeline in the field of valves of gas conveying systems, which comprises a one-way valve parent body, a one-way valve body, an inner sealing ring, a lifting head stop block, a lifting head, a gas guide block, an outer sealing ring and a spring. The check valve parent body and the child body are internally provided with an air guide block and a lifting head stop block, and the air guide block and the lifting head are internally provided with a lifting head and a spring. And the lifting head baffle block jointly form an inner seal, the outer sealing part is positioned between the lifting head baffle block and the air guide block, and forms an outer seal together with the check valve body and the check valve parent body, so that gas leakage is prevented, and a plurality of air guide grooves are uniformly distributed on the air guide block. According to the invention, under the action of the air guide block with the air guide groove inside the one-way valve, the air flow stably passes through the one-way valve by changing the displacement of the lifting head when the air flow passes through the one-way valve, so that the occurrence of resonance condition is prevented.

Inventors

• XU JIANHONG
• ZHU MINGJING

Assignees

• 上海图勃气体设备有限公司

Dates

Publication Date

20260512

Application Date

20241109

Claims (4)

1. 1. The resonance elimination structure of the gas check valve is characterized by comprising a check valve parent body (1), a check valve body (2), an inner sealing ring (3), a lifting head stop block (4), a lifting head (5), a gas guide block (6), an outer sealing ring (7) and a spring (8); The one-way valve is characterized in that an independent sealing ring (4), a lifting head (5), a lifting head stop block (4), an air guide block (6), an inner sealing ring (3) and an outer sealing ring (7) are arranged in the one-way valve parent body (1) and the one-way valve child body (2), the air guide ring (6) is positioned between the lifting head (5) and the child body (2), the lifting head (5) is connected with the inner sealing ring (3) for one section, a spring (8) is arranged in the lifting head (5), and an air guide channel is arranged on the air guide block (6).
2. 2. The one-way valve resonance elimination structure according to claim 1, wherein a limit boss is arranged on the air guide block (6), and a diversion trench is arranged on the diversion ring.
3. 3. The resonance elimination structure of the one-way valve according to claim 2, wherein the diversion grooves on the air guide block (6) are uniformly distributed.
4. 4. The one-way valve resonance elimination structure according to claim 3, wherein two ends of the guide groove on the air guide block (6) are of circular arc structures, the middle width of the guide groove is 2-5 mm, and the guide grooves are of uniform distribution structures.

Description

Resonance eliminating structure for gas one-way valve Technical Field The invention relates to the technical field of valves of gas conveying systems, in particular to a resonance elimination structure of a one-way valve of a gas pipeline system. Background The gas one-way valve is an important component of a gas conveying system and is mainly used for conveying high-pressure gas and low-pressure gas through a pipeline, and is automatically closed and kept sealed under the action of inlet and outlet pressure difference and a spring when carrier gas is replaced between a gas source and gas equipment. The gas check valve is generally composed of a check valve parent body, a check valve body, a poppet, a spring and a sealing element. The clearance fit between the lifting head and the check valve body realizes the guiding effect, nitrogen flows down under certain air, the check valve can generate resonance phenomenon, namely, the lifting head overview moves under the interaction of air flow and a spring, howling is generated, high-frequency unstable air flow occurs, even the lifting head can be heated, and the spontaneous combustion of air in a pipeline, the sealing failure and the influence on experimental equipment, laboratories and the safety of related personnel can be possibly caused. The existing solution to the resonance phenomenon of the check valve is to replace a spring which generates resonance under the corresponding air flow so as to change the corresponding resonance frequency to realize the vibration-proof effect. However, the above method still has problems, such as that the spring is easy to replace in real conditions, resonance phenomenon cannot be avoided even if the spring is replaced in a micro-pressure and small flow, and the labor cost is greatly increased when the spring is replaced. Disclosure of Invention Aiming at the defects of the existing products, the invention aims to provide a resonance elimination structure of a gas one-way valve. The invention provides a resonance elimination structure of a gas check valve, which comprises a check valve parent body, a check valve body, a lifting head stop block, an air guide block, a spring, an inner sealing ring and an outer sealing ring, wherein the check valve parent body is provided with a plurality of check valves; The check valve parent body and the check valve body are internally provided with a lifting head, a lifting head stop block, a spring, an air guide block, an inner sealing ring and an outer sealing ring, and the air guide block is positioned between the lifting head and the check valve body. And the strip-shaped air guide grooves are uniformly distributed around the air guide block, and the air outlet end of the air guide block is provided with a limiting boss. In some embodiments, the two ends or the air inlet end of the air guide groove are designed to be arc structures. In some embodiments, the air inlet end of the air guide groove is designed into a V-shaped structure, In some embodiments, the limit boss may be designed as a separate piece that fits inside the air guide block. Compared with the prior art, the invention has the following beneficial effects: According to the invention, the air guide block structure is added between the valve core of the one-way valve and the sub-body of the one-way valve, so that the original air flow is changed into an outer flow channel from the valve core passing mode, and the air flow is dispersed between the valve core and the sub-body, thereby achieving the purpose of inhibiting resonance; When gases with different flows pass through the one-way valve, the valve core is displaced differently due to the combined action of the springs and the vent holes of the outer flow channel, and the initial opening position of the valve core is provided with an arc or V-shaped structure, so that the gases can stably pass through the one-way valve without resonance; meanwhile, the limiting boss is arranged on the air guide block, the boss can inhibit excessive displacement of the valve core, so that the valve core reaches an optimal position, and at the moment, the gas flows through the check valve to the maximum, so that the influence of overlarge opening of the valve core on the normal operation of the check valve is avoided, and the reliability of the check valve is ensured. Drawings The invention is further described below with reference to the accompanying drawings. Fig. 1 is a schematic sectional view of a resonance elimination structure of a gas check valve according to the present invention, and fig. 2 is a schematic sectional view of a gas guide block. Reference numerals: Check valve matrix 1 Check valve body 2 Inner seal ring 3 and outer seal ring 7 The lifting head baffle 4 lifts the head 5 Air guide block 6 spring 8 Detailed Description The present invention will be described in detail with reference to specific embodiments. The following embodiments will assist those skilled in the art in