Search

CN-224229338-U - Axial flow type check valve

CN224229338UCN 224229338 UCN224229338 UCN 224229338UCN-224229338-U

Abstract

The utility model relates to an axial flow check valve, which relates to the technical field of axial flow check valves and comprises a valve body, a valve cover, a valve seat, a valve core and an elastic component, wherein a water outlet is formed in the valve body, a water inlet and a connecting port are formed in the valve cover, one end of the valve cover is in threaded connection with the inner wall of the valve body, the valve seat is arranged at one end of the valve cover, which is close to the valve body, the valve core is arranged in the valve body, a guide cylinder is arranged at one end of the valve core, which is close to the valve cover, and is abutted to the valve seat to form a seal, the guide cylinder penetrates through the valve seat and penetrates through the connecting port, the outer peripheral surface of the guide cylinder is in sliding connection with the valve seat and the inner wall of the valve cover, a plurality of through holes are formed in the guide cylinder, and the elastic component is arranged in the valve body and is used for applying force to the valve core, which is close to the valve seat and allowing the valve seat to move in a direction away from the valve core. The valve can be opened after the flow passage between the valve core and the valve seat reaches a certain size, so that the valve core is prevented from being damaged by cavitation caused by the narrow flow passage.

Inventors

  • CHEN GUOYONG
  • QI YONGDONG
  • LI XIANCHANG

Assignees

  • 威腾阀门有限公司

Dates

Publication Date
20260512
Application Date
20250510

Claims (8)

  1. 1. The axial flow check valve is characterized by comprising a valve body (1), a valve cover (2), a valve seat (3), a valve core (4) and an elastic component, wherein a water outlet (11) is formed in the valve body (1), a water inlet (21) and a connecting port (22) are formed in the valve cover (2), one end of the valve cover (2) is inserted into the valve body (1) and is in threaded connection with the inner wall of the valve body (1), the valve seat (3) is arranged at one end, close to the valve body (1), of the valve cover (2), the valve core (4) is arranged in the valve body (1), one end, close to the valve cover (2), of the valve core (4) is abutted to the valve seat (3) to form a seal, the guide cylinder (41) penetrates through the valve seat (3) and is arranged in the connecting port (22), the outer peripheral surface of the guide cylinder (41) is in sliding connection with the inner wall of the valve seat (3) and the valve cover (2), a plurality of through holes (41) are formed in the guide cylinder (41), the elastic component is arranged in the valve body (1), for applying a force to the valve element (4) to bring it closer to the valve seat (3) and allowing the valve seat (3) to move in a direction away from the valve element (4).
  2. 2. The axial flow check valve according to claim 1, wherein the elastic component comprises a spring (51) and a spring seat (52), the spring seat (52) is fixedly arranged inside the valve body (1), the spring (51) is arranged inside the valve body (1), and two ends of the spring (51) are respectively abutted with one end, away from the valve cover (2), of the valve core (4) and the spring seat (52).
  3. 3. The axial flow check valve of claim 2, wherein the end of the valve core (4) close to the spring seat (52) and the surface of the spring seat (52) close to the valve core (4) are fixedly provided with limit posts (6), and two ends of the spring (51) are respectively sleeved on the two limit posts (6).
  4. 4. The axial flow check valve of claim 1, wherein the guide cylinder (41) and the valve core (4) are integrally formed, a first mounting groove (23) is formed in one end, close to the valve core (4), of the valve cover (2), the valve seat (3) is slidably arranged in the first mounting groove (23), a sealing cushion (24) is further arranged in the first mounting groove (23), one surface of the sealing cushion (24) is abutted to one surface, far away from the valve core (4), of the valve seat (3), and the other surface of the sealing cushion is abutted to the valve cover (2).
  5. 5. The axial flow check valve according to claim 4, wherein the outer circumferential surface of the valve seat (3) is provided with a limit groove (31), the inner circumferential surface of the valve cover (2) is fixedly provided with a limit ring (25), and the limit ring (25) is positioned in the limit groove (31).
  6. 6. The axial flow check valve according to claim 1, wherein a second mounting groove (42) is formed in the outer peripheral surface of the valve core (4), a first sealing ring (43) is sleeved in the second mounting groove (42), and the first sealing ring (43) is abutted against the valve seat (3).
  7. 7. The axial flow check valve according to claim 1, wherein a sealing groove (26) is formed in the outer peripheral surface of the valve cover (2), a second sealing ring (27) is sleeved in the sealing groove (26), and the second sealing ring (27) is abutted against the inner peripheral surface of the valve body (1).
  8. 8. An axial flow check valve according to claim 1, wherein a hexagonal body (12) is provided on the outer peripheral surface of the valve body (1), the hexagonal body (12) being integrally formed with the valve body (1).

Description

Axial flow type check valve Technical Field The application relates to the technical field of axial flow check valves, in particular to an axial flow check valve. Background The axial flow check valve is a specially designed check valve, and is mainly used for preventing medium from flowing backwards in a pipeline system and protecting equipment safety. Compared with the traditional check valve (such as a lifting type check valve and a swing type check valve), the novel check valve has the core characteristics of optimization of flow passage design and axial movement of the valve clack, and has lower flow resistance, faster response speed and smaller water hammer effect. At present, the publication number CN108561599B is published on the date 2024 and 01 month 02, and the chinese patent invention provides an axial-flow check valve, which comprises a valve body, a valve clack assembly arranged in the valve body and used for opening and closing the valve body, and a first elastic element arranged in the valve body and used for providing elastic restoring force for the valve clack assembly, the axial-flow check valve also comprises a damping valve shaft, one end of the valve clack assembly and one end of the damping valve shaft are sleeved with the damping valve shaft, a part of the damping valve shaft positioned in the valve clack assembly has a preset gap between the radial direction of the damping valve shaft and the valve clack assembly, the density of the valve clack assembly is equal to that of a medium to be flowed into the valve body, the other end of the damping valve shaft is sleeved with a bushing relatively fixed with the valve body, one end of the bushing, which is away from the valve clack assembly, is provided with a damping hole, and the bushing is internally provided with a second elastic element used for providing elastic restoring force for the damping valve shaft. The axial flow check valve can slowly open the valve clack and can completely close the valve clack in the closing process of the valve clack. In the axial flow check valve in the related art, when the valve circulates high-pressure liquid inside, the valve clack and the sealing ring are separated to generate small opening circulation when the valve is opened and closed, at the moment, a flow passage between the valve clack and the sealing ring is narrow, the flow speed of the liquid at the position is increased, the pressure intensity is reduced, the valve is caused to generate cavitation phenomenon by sudden pressure drop of the liquid, the sealing surface of the valve is damaged, and the valve is easy to leak after long-term use. Disclosure of utility model The embodiment of the application provides an axial flow check valve, which can solve the technical problem that a valve clack is easily damaged by liquid cavitation when the valve in the related technology circulates at a small opening. The embodiment of the application provides an axial flow check valve, which comprises a valve body, a valve cover, a valve seat, a valve core and an elastic component, wherein a water outlet is formed in the valve body, a water inlet and a connecting port are formed in the valve cover, one end of the valve cover is inserted into the valve body and is in threaded connection with the inner wall of the valve body, the valve seat is arranged at one end of the valve cover, which is close to the valve body, the valve core is arranged in the valve body, one end of the valve core, which is close to the valve cover, is provided with a guide cylinder, one end of the valve core, which is close to the valve cover, is abutted to the valve seat to form a seal, the guide cylinder penetrates through the valve seat and penetrates through the connecting port, the outer peripheral surface of the guide cylinder is in sliding connection with the valve seat and the inner wall of the valve cover, a plurality of through holes are formed in the guide cylinder, and the elastic component is arranged in the valve body and is used for exerting force for enabling the valve core to be close to the valve seat to move towards a direction away from the valve core. The valve core is pressed on the valve seat under the action of the liquid pressure in the elastic component and the valve body in the initial state, the valve is in the closed state, after the valve is connected, when the pressure of liquid at the water inlet is larger than the pressure of liquid at the water outlet by a certain degree, the liquid at the water inlet pushes the valve core to be separated from the valve seat, the guide cylinder slides in the connecting port, the valve is still in the closed state because the through hole is at a certain distance from the sealing surface of the valve seat, the sealing surface of the valve core is gradually far away from the sealing surface of the valve seat along with the continuous movement of the valve core and the guide cylinder, after the through hole moves to th