Combined check valve

Abstract

The utility model provides a combined check valve, and belongs to the technical field of check valves. The check valve solves the problems that an existing check valve is complex in assembly and inconvenient to replace. The combined check valve comprises a valve body with a water inlet and a water outlet and a valve element arranged in the valve body and connected with the valve body in a matched mode, an abutting ring protruding inwards in the radial direction and abutting against the valve element is arranged on the inner wall, located at the water inlet, of the valve body, and an abutting ring matched with the abutting ring in a clamped mode is arranged on the inner wall, located at the water outlet, of the valve body. The abutting unit is matched with the valve element and facilitates replacement of the valve element. The utility model has the advantage of convenience in assembly and replacement.

Description

Technical Field

[0001] The utility model belongs to the technical field of check valves and relates to a combined check valve. Background Art

[0002] A check valve is a valve that blocks the backflow of media, and is therefore widely used in different occasions. Existing check valves are generally composed of a valve body, a ring frame, a valve stem, a spring, and a valve disc arranged on the valve stem. Therefore, its assembly is relatively cumbersome, which affects the assembly efficiency. At the same time, it is relatively inconvenient to replace it after it is damaged, and thus does not meet the use requirements. Summary of the invention

[0003] The utility model aims to provide a check valve which can be quickly assembled and easily replaced in view of the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved through the following technical solutions: a combined check valve, including a valve body with a water inlet and a water outlet, and a valve core arranged in the valve body and matched with the valve core, characterized in that a resistance ring that protrudes radially inward and interferes with the valve core is provided on the inner wall of the valve body at the water inlet, and a resistance unit that is snap-fitted with the valve core and cooperates with the valve core and facilitates replacement of the valve core is provided on the inner wall of the valve body at the water outlet.

[0005] In the above-mentioned combined check valve, the valve core is composed of a valve disc and a return spring, the end face of the valve disc that contacts the resistance ring is a stepped face, the two ends of the return spring respectively contact the resistance unit and the valve disc, and the end face of the valve disc that contacts the return spring is provided with a convex ring portion that protrudes axially outward and is used to limit the position of the return spring.

[0006] In the above-mentioned combined check valve, the resistance unit is a resistance plate frame, which is composed of a U-shaped shell for one end of the reset spring to extend into and install, and a plurality of connecting plates connected to the U-shaped shell. The inner wall of the valve body is provided with a plurality of mounting blocks connected to it, and the number is the same as the number of connecting plates, and the corresponding connecting plates are installed. A recessed groove which is recessed in the axial line and for the sliding installation of the connecting plate is provided on one side wall of the mounting block. A magnetic attraction unit can be provided between the connecting plate and the mounting block to make the connection more stable, and a through hole is provided on the end face of the U-shaped shell.

[0007] Compared with the prior art, this combined check valve has the following advantages:

[0008] 1. A resistance ring which protrudes radially inward and resists the valve core is arranged on the inner wall of the valve body at the water inlet, and a resistance unit which is engaged with the valve core and cooperates with the valve core and is convenient for replacing the valve core is arranged on the inner wall of the valve body at the water outlet. The arrangement of the above structure facilitates the rapid replacement of the whole valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the cross-sectional structure of the combined check valve.

[0010] In the figure, 1, valve body; 2, resistance ring; 3, valve disc; 4, return spring; 5, convex ring; 6, resistance plate frame; 7, U-shaped shell; 8, connecting plate; 9, mounting block. DETAILED DESCRIPTION

[0011] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0012] like Figure 1 As shown, the combined check valve comprises a valve body 1 with a water inlet and a water outlet, and a valve core arranged in the valve body 1 and connected thereto. A radially inwardly protruding conflicting ring 2 which conflicts with the valve core is provided on the inner wall of the valve body 1 at the water inlet. A conflicting unit which is snap-fitted with the conflicting ring and matches the valve core and is convenient for replacing the valve core is provided on the inner wall of the valve body 1 at the water outlet. The valve core is composed of a valve flap 3 and a reset spring 4. The end surface of the valve flap 3 which conflicts with the conflicting ring 2 is a stepped surface. The valve flap 3 is located on the stepped surface and may be sleeved with a sealing ring. The two ends of the reset spring 4 conflict with the conflicting unit and the valve flap 3 respectively. The end surface of the valve flap 3 which conflicts with the reset spring 4 is provided with an axially outwardly protruding portion which is used to limit the reset. The convex ring portion 5 at the position of the spring 4, the resistance unit is a resistance plate frame 6, which is composed of a U-shaped shell 7 for one end of the reset spring 4 to extend into and install, and a plurality of connecting plates 8 connected to the U-shaped shell 7. The plurality of connecting plates 8 are arranged at intervals along the circumferential direction of the U-shaped shell 7. The inner wall of the valve body 1 is provided with a plurality of mounting blocks 9 connected to it, and the number is the same as the number of the connecting plates 8, and the corresponding connecting plates 8 are installed. A recessed groove that is recessed in the axial line and for the connecting plate 8 to be slidably installed is provided on one side wall of the mounting block 9. A magnetic attraction unit that makes the connection more stable can be provided on the connecting plate 8 and between the mounting block 9. The magnetic attraction unit is composed of two magnetic blocks, and the two magnetic blocks are respectively embedded in the connecting plate 8 and the mounting block 9. A through hole is provided on the end surface of the U-shaped shell 7.

[0013] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0014] Although the term ", " and " are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A combined check valve, comprising a valve body (1) having a water inlet and a water outlet, and a valve core arranged in the valve body (1) and connected thereto, characterized in that: The inner wall of the valve body (1) at the water inlet is provided with a resistance ring (2) which protrudes radially inward and contacts the valve core. The inner wall of the valve body (1) at the water outlet is provided with a resistance unit which is engaged with the valve core and cooperates with the valve core and is convenient for replacing the valve core. The valve core is composed of a valve flap (3) and a return spring (4). The end surface of the valve flap (3) contacting the resistance ring (2) is a stepped surface. The two ends of the return spring (4) are respectively in contact with the resistance unit and the valve flap (3). The end surface of the valve flap (3) contacting the return spring (4) is provided with a convex ring portion (5) which protrudes axially outward and is used to limit the position of the return spring (4). The abutment unit is a abutment plate frame (6), which is composed of a U-shaped shell (7) into which one end of a return spring (4) is inserted and installed, and a plurality of connecting plates (8) connected to the U-shaped shell (7). The inner wall of the valve body (1) is provided with a plurality of mounting blocks (9) connected to the valve body (1), the number of which is the same as the number of connecting plates (8) and for mounting corresponding connecting plates (8). A recessed groove which is recessed inwardly in the axial line and for sliding installation of the connecting plate (8) is provided on one side wall of the mounting block (9). A magnetic attraction unit which makes the connection more stable can be provided between the connecting plate (8) and the mounting block (9). A through hole is provided on the end surface of the U-shaped shell (7).

Images