Check valve with built-in valve plate

Abstract

The utility model relates to the field of check valves, in particular to a check valve with a built-in valve plate, which comprises a valve body and a sealing component arranged at an inlet of an inner cavity of the valve body, the sealing component comprises a valve seat, a rocker frame, a valve clack and a pin shaft, the valve seat is positioned at the inlet of the inner cavity of the valve body, one end of the valve seat is fixed with the inner wall of the valve body, and the other end of the valve seat is fixed with the rocker frame; the valve clack is rotationally connected with the rocker frame through a pin shaft and can rotate around the pin shaft under the action of media to be matched with the valve seat, and opening and closing of the valve are achieved. A supporting plate or a fixing block in the prior art can be omitted, the height of the valve body is reduced, the structure is more compact, cost is saved, the structure that the pin shaft penetrates through the valve clack can be used for replacing a rocker, the design of the rocker is omitted, cost is reduced, the gravity center of the valve clack is closer to the pin shaft, the force arm is reduced, and the opening force of the valve clack is reduced. And the matching concentricity between the valve clack and the sealing surface of the valve seat is improved.

Description

Technical Field

[0001] This utility model relates to the field of check valves, specifically a valve plate-mounted check valve. Background Technology

[0002] Swing check valves are used to prevent backflow of media in pipelines. They are generally installed horizontally in pipelines. In existing technology, swing check valves are divided into two types: external rocker arm swing valves and internal rocker arm swing valves. In the internal rocker arm swing valve, all opening and closing parts are installed inside the valve body and do not penetrate the valve body. Except for the sealing gasket and sealing ring at the middle flange, there are no external leakage points. Therefore, the existing forged high-pressure swing check valves in China mainly adopt the internal rocker arm swing valve structure.

[0003] Currently, there are two main structures for internal rocker arm swing check valves. One type has a fixed block welded to the valve body cavity to suspend the rocker arm and rocker arm bracket of the swing check valve. The other type has a support plate installed in the valve body cavity to suspend the rocker arm of the swing check valve and is clamped with four open rings. Both of these structures increase the overall height of the valve body. During assembly, the valve seat is first fixedly installed in the valve body channel, and the rocker arm needs to be fixedly installed in the pin hole on the rocker arm bracket with a pin shaft in the valve body cavity. Therefore, it is necessary to adjust the concentricity of the fit between the valve disc and the valve seat sealing surface in the valve body, which increases the difficulty of adjustment.

[0004] Based on this, this application proposes a valve plate-mounted check valve. Utility Model Content

[0005] The purpose of this utility model is to provide a valve plate-integrated check valve. By fixing the rocker arm to the valve seat and rotating the valve disc to the rocker arm via a pin, this design not only eliminates the need for support plates or fixing blocks in existing technologies, reducing the height of the valve body and making the structure more compact and cost-effective, but also replaces the rocker arm with a structure where the pin passes through the valve disc, eliminating the rocker arm design and reducing costs. Furthermore, this design brings the center of gravity of the valve disc closer to the pin, reducing the lever arm, lowering the valve disc opening force, and improving the concentricity between the valve disc and the valve seat sealing surface.

[0006] To solve the above-mentioned technical problems, this utility model provides a valve plate internal check valve, including a valve body and a sealing assembly disposed at the inlet of the valve body cavity. The sealing assembly includes a valve seat, a rocker arm, a valve disc, and a pin. The valve seat is located at the inlet of the valve body cavity, with one end fixed to the inner wall of the valve body and the other end fixed to the rocker arm. The valve disc is rotatably connected to the rocker arm via the pin. The valve disc can rotate around the pin under the action of the medium to cooperate with the valve seat, thereby realizing the opening and closing of the valve.

[0007] Furthermore, the inner wall of the valve body extends inward to form a positioning platform, and the valve seat is located below the positioning platform. The positioning platform is provided with a positioning hole one, and the valve seat is provided with a positioning hole two. Positioning pins are inserted into the positioning hole one and the positioning hole two.

[0008] Furthermore, the valve body and the valve seat are fixed together by welding.

[0009] Furthermore, the inner cavity of the valve body is provided with an installation groove, and a positioning platform is formed on one side wall of the installation groove. One end of the valve seat extends into the installation groove and abuts against the bottom wall of the installation groove. A welding joint is provided in the installation groove, and the valve seat and the valve body are connected by circumferential welding for sealing.

[0010] Furthermore, the weld joint is frustum-shaped.

[0011] Furthermore, the rocker arm has two symmetrically arranged rocker arms, and the valve disc is provided with a shaft hole. The valve disc is located between the two rocker arms and is rotatably connected to the two rocker arms through the shaft hole via the pin.

[0012] Furthermore, an adjusting shim is provided between the valve disc and the two rocker arms, and the adjusting shim is sleeved on the pin.

[0013] Furthermore, each of the rocker arm holders includes an integrally formed connecting section one and connecting section two. The connecting section one is in the shape of a straight line and is fixed to the valve seat. The connecting section two is in the shape of an annulus and has a through hole. The pin is inserted through the through hole and the two ends of the pin extend out of the corresponding through hole.

[0014] Furthermore, the rocker arm and the valve seat are an integral structure, or the rocker arm is welded to the valve seat.

[0015] Furthermore, the valve seat is provided with a sealing surface that cooperates with the valve disc, and the sealing surface is inclined from top to bottom toward the outlet of the valve body cavity.

[0016] The beneficial effects of this utility model are:

[0017] 1. The valve plate internal check valve of this utility model, by fixing the rocker arm to the valve seat and rotating the valve disc to the rocker arm through the pin, not only eliminates the support plate or fixing block in the prior art, reduces the height of the valve body, makes the structure more compact, and saves costs, but also uses the structure of the pin passing through the valve disc to replace the rocker arm, eliminating the rocker arm design and reducing costs. Moreover, this design makes the center of gravity of the valve disc closer to the pin, reduces the lever arm, reduces the valve disc opening force, and improves the concentricity between the valve disc and the valve seat sealing surface.

[0018] 2. The valve plate internal check valve of this utility model, through the design of the positioning platform and positioning pin, allows the sealing component to be installed and adjusted outside the valve body and then placed into the inlet of the valve body cavity. It can be connected and welded after being installed and tightened according to the position shown in the figure by the positioning pin. The positioning pin ensures that there will be no jamming during the opening and closing of the valve disc, thus improving the performance of the valve.

[0019] 3. The valve plate internal check valve of this utility model, through the design of two rocker arms, can improve the concentricity of the valve disc and valve seat sealing surfaces, ensure concentricity, and make the valve seal reliable;

[0020] 4. The valve plate internal check valve of this utility model, through the design of the adjusting shim, can avoid the valve disc and valve seat sealing surface from being misaligned due to processing errors, thus enhancing the valve sealing performance. Furthermore, by replacing the adjusting shims of different thicknesses, the gap can be calibrated, thereby improving maintenance efficiency.

[0021] 5. The valve plate internal check valve of this utility model has an inclined sealing surface on the valve seat that is inclined from top to bottom toward the outlet of the valve body cavity, which can ensure that the valve disc can be closed by gravity.

[0022] 6. The valve plate internal check valve of this utility model does not require adjusting the concentricity of the valve disc and valve seat sealing surface within the valve body. The sealing component can be assembled outside the valve body and the concentricity of the valve disc and valve seat sealing surface can be adjusted. Then, the assembled and adjusted sealing component can be installed at the inlet of the valve body cavity, which can facilitate adjustment and rework, ensure concentricity, and improve the ease of operation. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the valve plate-mounted check valve of Embodiment 1 of this utility model;

[0025] Figure 2 This is a top view of the valve plate-mounted check valve of Embodiment 1 of this utility model;

[0026] Figure 3 This is a schematic diagram of the valve seat and rocker arm frame of Embodiment 1 of this utility model;

[0027] In the diagram: 1-valve body, 2-sealing assembly, 3-positioning pin, 4-adjusting shim, 11-positioning platform, 12-welding joint, 21-valve seat, 22-rocker bracket, 221-connecting section one, 222-connecting section two, 2221-through hole, 23-valve disc, 24-pin, 211-positioning hole two, 212-sealing surface. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Example 1

[0030] like Figure 1-3 As shown, a valve plate-mounted check valve includes a valve body 1 and a sealing assembly 2 disposed at the inlet of the inner cavity of the valve body 1. The sealing assembly 2 includes a valve seat 21, a rocker arm 22, a valve disc 23, and a pin 24. The valve seat 21 is located at the inlet of the inner cavity of the valve body 1, with one end fixed to the inner wall of the valve body 1 and the other end fixed to the rocker arm 22. The valve disc 23 is rotatably connected to the rocker arm 22 through the pin 24. The valve disc 23 can rotate around the pin 24 under the action of the medium to cooperate with the valve seat 21, thereby realizing the opening and closing of the valve.

[0031] This utility model's valve plate-embedded check valve, by fixing the rocker arm to the valve seat and rotating the valve disc to the rocker arm via a pin, not only eliminates the need for support plates or fixing blocks in existing technologies, reducing the height of the valve body and making the structure more compact and cost-effective, but also utilizes a structure where the pin passes through the valve disc to replace the rocker arm, eliminating the rocker arm design and reducing costs. Furthermore, this design brings the center of gravity of the valve disc closer to the pin, reducing the lever arm, lowering the valve disc opening force, and improving the concentricity of the valve disc and valve seat sealing surfaces.

[0032] Specifically, in this embodiment, a positioning platform 11 extends inward from the inner wall of the valve body 1, and the valve seat 21 is located below the positioning platform 11. The positioning platform 11 is provided with a positioning hole 1, and the valve seat 21 is provided with a positioning hole 211. Positioning pins 3 are inserted into the positioning holes 1 and 211. The valve body 1 and the valve seat 21 are fixed together by welding. Here, through the design of the positioning platform and positioning pins, after the sealing assembly is assembled and adjusted outside the valve body, it is placed into the inlet of the valve body cavity. It can be connected and welded after being installed and pressed by the positioning pins 3 in the position shown in the figure. The positioning pins are used to ensure that there will be no jamming during the opening and closing of the valve disc, thus improving the performance of the valve.

[0033] Of course, this embodiment can also be understood as follows: the inner cavity of the valve body 1 is provided with a mounting groove, and a positioning platform 11 is formed on one side wall of the mounting groove. One end of the valve seat 21 extends into the mounting groove and abuts against the bottom wall of the mounting groove. A welding port 12 is provided in the mounting groove. The valve seat 21 and the valve body 1 are connected by a ring weld. The welding port 12 is shaped like a frustum. This arrangement facilitates the welding rod to be inserted into the welding port 12 for welding operations. Here, the inner cavity of the valve body 1 adopts a self-sealing structure.

[0034] like Figure 3 As shown, in this embodiment, there are two rocker arms 22 arranged symmetrically. The valve disc 23 is provided with a shaft hole. The valve disc 23 is located between the two rocker arms 22 and is rotatably connected to the two rocker arms 22 through the shaft hole via a pin 24. The design of the two rocker arms can improve the concentricity of the fit between the valve disc and the valve seat sealing surface, ensure concentricity, and make the valve sealing reliable.

[0035] like Figure 2 As shown, adjusting shims 4 are respectively provided between the valve disc 23 and the two rocker arms 22, and the adjusting shims 4 are sleeved on the pin 24. Here, the design of the adjusting shims can avoid the valve disc and valve seat sealing surface from being misaligned due to machining errors, thus enhancing the valve sealing performance. Furthermore, by replacing adjusting shims of different thicknesses, the gap can be calibrated, thereby improving maintenance efficiency.

[0036] In this embodiment, as Figure 3 As shown, each rocker arm 22 includes an integrally formed connecting section one 221 and connecting section two 222. Connecting section one 221 is in the shape of a straight line and is fixed to the valve seat 21. Connecting section two 222 is in the shape of a ring and has a through hole 2221. A pin 24 passes through the through hole 2221 and both ends of the pin 24 extend out of the corresponding through hole 2221. The rocker arm has a simple structure and can reduce manufacturing costs.

[0037] Specifically, in this embodiment, the connecting section 221 and the valve seat 21 are integral structures formed by casting, or the connecting section 221 and the valve seat 21 are welded, which is processed according to actual needs.

[0038] Specifically, such as Figure 3 As shown, the valve seat 21 is provided with a sealing surface 212 that cooperates with the valve disc 23. The sealing surface 212 is inclined from top to bottom toward the outlet of the valve body cavity. The design of the sealing surface being inclined at a certain angle here can ensure that the valve disc can be closed by gravity.

[0039] The installation process of this utility model is as follows:

[0040] On the outside of the valve body 1, the valve seat 21, rocker arm 22, valve disc 23, and pin 24 are assembled into a sealing assembly 2. The sealing assembly 2 is then placed at the inlet of the valve body 1's inner cavity, with one end of the valve seat 21 abutting against the bottom wall of the mounting groove. At this point, the first positioning hole on the positioning platform 11 and the second positioning hole 211 on the valve seat 21 are concentric. After inserting the positioning pin 3 and tightening it, a connection weld is performed to complete the valve installation. This sealing assembly can be assembled and adjusted outside the valve body before being placed at the inlet of the valve body 1, improving the concentricity between the sealing surfaces of the valve disc 23 and the valve seat 21. Furthermore, assembling the valve disc and valve seat outside the valve body 1 facilitates adjustment and rework, ensuring concentricity and reliable sealing.

[0041] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A valve plate-embedded check valve, characterized in that, The valve includes a valve body (1) and a sealing assembly (2) disposed at the inlet of the inner cavity of the valve body (1). The sealing assembly (2) includes a valve seat (21), a rocker arm (22), a valve disc (23), and a pin (24). The valve seat (21) is located at the inlet of the inner cavity of the valve body (1) and one end is fixed to the inner wall of the valve body (1), and the other end is fixed to the rocker arm (22). The valve disc (23) is rotatably connected to the rocker arm (22) through the pin (24). The valve disc (23) can rotate around the pin (24) under the action of the medium to cooperate with the valve seat (21) and realize the opening and closing of the valve.

2. The valve plate-embedded check valve according to claim 1, characterized in that, The inner wall of the valve body (1) extends inward to form a positioning platform (11). The valve seat (21) is located below the positioning platform (11). The positioning platform (11) is provided with a positioning hole one, and the valve seat (21) is provided with a positioning hole two (211). Positioning pins (3) are inserted into the positioning hole one and the positioning hole two (211).

3. A valve plate-embedded check valve according to claim 2, characterized in that, The valve body (1) and the valve seat (21) are fixed together by welding.

4. A valve plate-embedded check valve according to claim 3, characterized in that, The inner cavity of the valve body (1) is provided with an installation groove, and a positioning platform (11) is formed on one side wall of the installation groove. One end of the valve seat (21) extends into the installation groove and abuts against the bottom wall of the installation groove. The bottom wall of the installation groove is provided with a welding port (12). The valve seat (21) and the valve body (1) are connected by a ring weld seal.

5. A valve plate-embedded check valve according to claim 4, characterized in that, The weld joint (12) is frustum-shaped.

6. A valve plate-embedded check valve according to claim 1, characterized in that, The rocker arm (22) has two and is symmetrically arranged. The valve disc (23) is provided with a shaft hole. The valve disc (23) is located between the two rocker arms (22) and is rotatably connected to the two rocker arms (22) through the shaft hole via the pin (24).

7. A valve plate-embedded check valve according to claim 6, characterized in that, Adjusting shims (4) are provided between the valve disc (23) and the two rocker arms (22), and the adjusting shims (4) are sleeved on the pin (24).

8. A valve plate-embedded check valve according to claim 6, characterized in that, Each rocker arm (22) includes an integrally formed connecting section one (221) and connecting section two (222). The connecting section one (221) is in the shape of a straight line and is fixed to the valve seat (21). The connecting section two (222) is in the shape of a ring and has a through hole (2221). The pin (24) passes through the through hole (2221) and both ends of the pin (24) extend out of the corresponding through hole (2221).

9. A valve plate-mounted check valve according to any one of claims 1-8, characterized in that, The rocker arm (22) and the valve seat (21) are an integral structure, or the rocker arm (22) is welded to the valve seat (21).

10. A valve plate-embedded check valve according to claim 1, characterized in that, The valve seat (21) is provided with a sealing surface (212) that cooperates with the valve disc (23), and the sealing surface (212) is inclined from top to bottom toward the outlet of the inner cavity of the valve body (1).

Images