A swing check valve

Abstract

This utility model relates to a swing check valve, comprising a valve body, a valve cover, and a valve disc. The valve body has an inwardly formed valve cavity and a valve port. One end of the valve body has an inlet, and the other end has an outlet. The inlet and outlet are connected to the valve cavity. An opening is formed at the top of the valve body, communicating with the valve cavity. The valve cover is placed on the opening and threadedly connected to the inner wall of the opening. The valve disc is located in the valve cavity and is rotatably connected to the valve body. The valve disc can block the valve port and can open the valve port under the action of the medium introduced from the inlet. The valve cover is recessed inward to form an operating cavity, and the cavity wall of the operating cavity has a protrusion forming a convex part. The swing check valve provided by this utility model is easy to process, saves valve cover material, achieves energy saving and consumption reduction, and lowers production costs.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a swing check valve. Background Technology

[0002] Swing check valves are a type of check valve, also known as non-return valves or backflow valves. Their function is to prevent the backflow of media in a pipeline. Swing check valves are generally installed in places that prevent the backflow of media when the valve is not closed. They rely on the flow of the media in the pipeline to open or close the valve. Check valves have only one flow direction; if the media flows backward, the valve disc closes to prevent backflow.

[0003] In the traditional swing check valve structure, the valve cover is usually designed as a hexagonal structure. However, the traditional hexagonal valve cover structure requires machining processes such as turning and broaching. The machining process is complex and often requires a large material thickness and volume, resulting in high production costs. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to provide a swing check valve.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A swing check valve, comprising:

[0007] The valve body has an inwardly formed valve cavity and valve port. One end of the valve body has an inlet and the other end has an outlet. The inlet and the outlet are respectively connected through the valve cavity. The top of the valve body has an opening that is connected to the valve cavity.

[0008] A valve cover is disposed on the opening and threadedly connected to the inner wall of the opening;

[0009] A valve disc is disposed within the valve cavity and is rotatably connected to the valve body. The valve disc can block the valve port and can open the valve port under the action of the medium introduced from the inlet.

[0010] The valve cover is recessed inward to form an operating cavity, and the cavity wall of the operating cavity is raised to form a protrusion.

[0011] Understandably, by setting a protrusion on the valve cover, which serves as a tightening structure and is used to tighten or loosen the valve cover in conjunction with a tightening tool, the valve cover only needs to be machined by turning its outer shape during machining, saving the broaching process. By opening an operating cavity, the valve cover forms a concave structure, reducing its volume, saving valve cover material, achieving energy saving and consumption reduction, and lowering production costs.

[0012] In one embodiment, the number of protrusions is two, and the two protrusions are arranged at intervals along the circumferential direction of the operating cavity.

[0013] In one embodiment, a limiting boss is formed on the valve cover, which can abut against the edge of the opening to limit the displacement of the valve cover toward the valve cavity.

[0014] In one embodiment, the protrusion is symmetrically arranged about the central axis of the valve cover.

[0015] In one embodiment, a mounting platform is provided inside the valve body, the mounting platform is located above and close to the valve port, and a rocker arm is provided on the valve disc, the valve disc is suspended and mounted on the mounting platform by the rocker arm.

[0016] In one embodiment, the mounting platform has a limiting portion that can abut against the rocker arm to limit the valve disc along the thickness direction of the valve disc.

[0017] In one embodiment, the valve disc and the rocker arm are configured as a single unit.

[0018] In one embodiment, the valve port protrudes along one side edge of the valve disc and forms a sealing ring, which can seal with the valve disc.

[0019] In one embodiment, the thickness of the sealing ring gradually decreases toward the valve disc along the radial direction of the valve port.

[0020] In one embodiment, the inner wall of the inlet is provided with internal threads, and the inner wall of the outlet is provided with internal threads.

[0021] The advantages of this utility model:

[0022] This utility model claims a swing check valve, which features a protrusion on the valve cover. The protrusion serves as a tightening structure, used in conjunction with a tightening tool to tighten or loosen the valve cover. The valve cover only requires external turning during machining, saving the broaching process. The valve cover also has an operating cavity, forming a concave structure, which reduces its volume, saves valve cover material, achieves energy saving and consumption reduction, and lowers production costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the conventional technology, the drawings used in the description of the embodiments or the conventional technology 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 A perspective view of a swing check valve provided in an embodiment of the present invention;

[0025] Figure 2 A schematic diagram of a swing check valve provided in an embodiment of the present invention from one perspective;

[0026] Figure 3 for Figure 2 Sectional view at point AA;

[0027] Figure 4 This is a schematic diagram of the valve body and valve disc provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the valve cover provided in one embodiment of the present utility model;

[0029] Figure 6 This is a schematic diagram of the valve disc provided in one embodiment of the present invention.

[0030] Reference numerals: 100, swing check valve; 10, valve body; 11, valve chamber; 12, valve port; 13, inlet; 14, outlet; 15, opening; 16, mounting platform; 161, limiting part; 17, sealing ring; 20, valve cover; 21, operating chamber; 22, protrusion; 23, limiting boss; 30, valve disc; 31, rocker arm. Detailed Implementation

[0031] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figures 1 to 3 This utility model provides a swing check valve 100, which includes a valve body 10, a valve cover 20, and a valve disc 30. The valve body 10 has an inwardly formed valve cavity 11 and a valve port 12, with the valve cavity 11 extending through the valve body 10 in the transverse direction. One end of the valve body 10 has an inlet 13, and the other end has an outlet 14. The inlet 13 and outlet 14 are located at opposite ends of the valve body 10 and communicate through the valve cavity 11. The top of the valve body 10 has an opening 15, which communicates with the valve cavity 11. The valve cover 20 covers the opening 15 and is threaded to the inner wall of the opening 15. The valve disc 30 is located within the valve cavity 11 and is rotatably connected to the valve body 10. The valve disc 30 can block the valve port 12 and can open the valve port 12 under the action of the medium introduced from the inlet 13. When no more medium enters the inlet 13, the valve disc 30 falls down under its own gravity and blocks the valve port 12. When there is backflow of medium at the outlet 14, the valve disc 30 can tightly close the valve port 12 under the action of the backflowing medium, so that the medium at the outlet 14 cannot flow through the valve port 12 to the inlet 13, thus preventing backflow.

[0037] Among them, such as Figure 1 , Figure 3 and Figure 5 As shown, the valve cover 20 is recessed inward to form an operating cavity 21, and the cavity wall of the operating cavity 21 has a protrusion 22. By providing the protrusion 22 on the valve cover 20, the protrusion 22 serves as a tightening structure, used to cooperate with a tightening tool to tighten or loosen the valve cover 20. During machining, the valve cover 20 only needs to be turned in shape, saving the broaching process. By opening the operating cavity 21, the valve cover 20 forms an inward concave structure, reducing its volume, saving valve cover 20 material, achieving energy saving and consumption reduction, and lowering production costs.

[0038] In this embodiment, there are two protrusions 22, which are arranged at intervals along the circumferential direction of the operating cavity 21, so that the operation stability is better when the valve cover 20 is turned.

[0039] Of course, the convex part 22 can be one or three, etc., and there is no restriction here.

[0040] Specifically, the protrusion 22 is symmetrically arranged about the central axis of the valve cover 20.

[0041] like Figure 3 As shown, in one embodiment, a limiting boss 23 is formed on the valve cover 20. The limiting boss 23 is annular and is arranged around the circumference of the valve cover 20. The limiting boss 23 can abut against the edge of the opening 15 to limit the displacement of the valve cover 20 toward the valve cavity 11.

[0042] like Figure 4 As shown, in one embodiment, a mounting platform 16 is provided inside the valve body 10. The mounting platform 16 is located above and close to the valve port 12. A rocker arm 31 is provided on the valve disc 30. The valve disc 30 is suspended and mounted on the mounting platform 16 via the rocker arm 31, so as to realize the rotatable connection of the valve disc 30 on the valve body 10. The installation structure between the mounting platform 16 and the valve disc 30 is simple and easy to process, which is conducive to improving production efficiency.

[0043] like Figure 4 As shown, in one embodiment, the mounting platform 16 has a limiting portion 161, which is formed by the mounting platform 16 protruding towards the valve cover 20. The limiting portion 161 can abut against the rocker arm 31 to limit the valve disc 30 along the thickness direction of the valve disc 30.

[0044] like Figure 6 As shown, in this embodiment, the valve disc 30 and the rocker arm 31 are integrated, resulting in a simple structure that is easy to manufacture. Of course, in other embodiments, the valve disc 30 and the rocker arm 31 can also be separate components.

[0045] In one embodiment, the valve port 12 protrudes along one side edge of the valve disc 30 and forms a sealing ring 17, which can seal with the valve disc 30.

[0046] Furthermore, along the radial direction of the valve port 12, the thickness of the sealing ring 17 gradually decreases towards the valve disc 30. This results in a smaller contact area between the sealing ring 17 and the valve disc 30, which helps improve the sealing effect.

[0047] In this embodiment, the inner wall of the inlet 13 is provided with internal threads, and the inner wall of the outlet 14 is provided with internal threads, which can be used to connect with the external pipeline thread respectively.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the patent protection scope of this utility model should be determined by the appended claims.

Claims

1. A swing check valve, characterized in that, include: The valve body (10) has a valve cavity (11) and a valve port (12) formed inward. One end of the valve body (10) has an inlet (13) and the other end of the valve body (10) has an outlet (14). The inlet (13) and the outlet (14) are connected through the valve cavity (11). The top of the valve body (10) has an opening (15) that is connected to the valve cavity (11). A valve cover (20) is provided over the opening (15) and threaded to the inner wall of the opening (15); A valve disc (30) is located in the valve cavity (11). The valve disc (30) is rotatably connected to the valve body (10). The valve disc (30) can block the valve port (12) and can open the valve port (12) under the action of the medium introduced from the inlet (13). The valve cover (20) is recessed inward to form an operating cavity (21), and the cavity wall of the operating cavity (21) is raised to form a protrusion (22).

2. The swing check valve according to claim 1, characterized in that, The number of protrusions (22) is two, and the two protrusions (22) are arranged at intervals along the circumferential direction of the operating cavity (21).

3. A swing check valve according to claim 1, characterized in that, A limiting boss (23) is formed on the valve cover (20), which can abut against the edge of the opening (15) to limit the displacement of the valve cover (20) toward the valve cavity (11).

4. A swing check valve according to claim 1, characterized in that, The protrusion (22) is symmetrically arranged about the central axis of the valve cover (20).

5. A swing check valve according to claim 1, characterized in that, The valve body (10) is provided with a mounting platform (16), which is located above and close to the valve port (12). The valve disc (30) is provided with a rocker arm (31), which is suspended on the mounting platform (16) by the rocker arm (31).

6. A swing check valve according to claim 5, characterized in that, The mounting platform (16) has a limiting part (161) that can abut against the rocker arm (31) to limit the valve disc (30) along the thickness direction of the valve disc (30).

7. A swing check valve according to claim 6, characterized in that, The valve disc (30) and the rocker arm (31) are integrated.

8. A swing check valve according to claim 1, characterized in that, The valve port (12) protrudes along one side of the valve disc (30) and forms a sealing ring (17), which can seal with the valve disc (30).

9. A swing check valve according to claim 8, characterized in that, Along the radial direction of the valve port (12), the thickness of the sealing ring (17) gradually decreases toward the valve disc (30).

10. A swing check valve according to claim 1, characterized in that, The inner wall of the inlet (13) is provided with internal threads, and the inner wall of the outlet (14) is provided with internal threads.

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