Swing check valve

Abstract

The utility model relates to the technical field of check valves, in particular to a swing check valve which comprises a valve body, a water inlet and a water outlet, a valve seat is arranged at the end, close to the water inlet, of the valve body, an opening and closing mechanism is arranged in the valve body, and the opening and closing mechanism comprises a valve clack used for controlling opening and closing of the water inlet; the side, close to the water inlet of the valve body, of the valve clack is arranged to be the semi-spherical extending piece, the sealing piece on the valve clack is arranged to be in the ball cap shape, when the valve clack is closed, the sealing piece on the outer side of the valve clack blocks the water inlet of the valve body, and meanwhile the brim-shaped extending piece of the sealing piece covers the valve seat; compared with the prior art, the contact area between the sealing piece on the valve clack and the water inlet of the valve body is increased, a gap is prevented from being reserved between the valve clack and the water inlet of the valve body when particle impurities are reserved at the water inlet of the valve body, the possibility of medium backflow is further reduced, meanwhile, the water inlet of the valve body cannot interfere with movement of the valve clack, and the structural design is reasonable and effective.

Description

Technical Field

[0001] The present application relates to the technical field of swing check valves, and in particular to a swing check valve. Background Art

[0002] Check valves are also called non-return valves. Their function is to prevent the backflow of media in the pipeline. The valve that opens or closes automatically by the flow and force of the medium to prevent the backflow of the medium is called a check valve. Check valves belong to the automatic valve category. They are mainly used in pipelines where the medium flows in one direction. They only allow the medium to flow in one direction to prevent accidents. This type of valve should generally be installed horizontally in the pipeline;

[0003] Referring to the existing Chinese patent application with publication number CN215635166U, a swing check valve is disclosed. During the assembly process, the connection block is inserted into the slot, and the valve cover is fixed to the valve body. The connection block is limited by the valve cover to fix the connection block in the slot, so that the connection block does not need to be fixed with an additional fixing mechanism, thereby realizing convenient disassembly and assembly between the fork-shaped member and the valve body. In combination with the detachable plug-in component, the assembly between the valve disc and the rocker arm does not need bidirectional locking, thereby reducing the manual workload and improving the production efficiency of the check valve.

[0004] However, in the prior art, after the liquid stops flowing in the swing check valve, the water flow rate at the water inlet of the valve body decreases. At this time, particulate impurities will remain on the sealing ring on the valve disc and the water inlet of the valve body, resulting in a gap between the valve disc and the water inlet of the valve body. In severe cases, it may cause the medium to flow back and cause economic losses. For this reason, we have designed a new hopper cleaning machine and its use method; for this reason, we have designed a swing check valve. Summary of the invention

[0005] A swing check valve provided in an embodiment of the present application can increase the contact area between the seal on the valve flap and the water inlet of the valve body, thereby preventing the technical problem of the possibility of medium backflow caused by a gap between the valve flap and the water inlet of the valve body when particulate impurities remain in the water inlet of the valve body.

[0006] The embodiment of the present application provides a swing check valve, comprising: a valve body, a water inlet and a water outlet, wherein a valve seat is provided at one end of the valve body close to the water inlet, an opening and closing mechanism is provided in the valve body, and the opening and closing mechanism comprises a valve flap for controlling the opening and closing of the water inlet;

[0007] In actual use, the two ends of the valve body are installed with the pipeline through the flange connection plate. When the fluid in the pipeline enters the valve body from the water inlet of the valve body, the valve disc rotates toward the sealing cover under the impact of the fluid at the water inlet. When the fluid in the pipeline stops entering the valve body, when the external force and the self-gravity of the valve disc near the water outlet end are greater than the external force near the water inlet end, the valve disc closes, and the valve disc opens or closes automatically by the flow and force of the medium to prevent the medium from flowing back.

[0008] The above technical solutions in the embodiments of the present application have at least the following technical effects:

[0009] 1. In the present application, a side of the valve disc close to the water inlet of the valve body is set as a hemispherical extension piece, and the sealing member on the valve disc is set as a spherical cap. When the valve disc is closed, the sealing member on the outside of the valve disc blocks the water inlet of the valve body, and at the same time, the brim-shaped extension piece of the sealing member covers the valve seat. Compared with the prior art, the contact area between the sealing member on the valve disc and the water inlet of the valve body is increased, and a gap is prevented between the valve disc and the water inlet of the valve body when particulate impurities are left at the water inlet of the valve body, thereby reducing the possibility of medium backflow.

[0010] 2. In the present application, since the side of the valve disc close to the water inlet of the valve body is set as a hemispherical extension piece, and the inner side of the valve seat is a cylindrical cavity, when the rocker arm rotates with the pin shaft, the water inlet of the valve body will not interfere with the movement of the valve disc, and the structural design is reasonable and effective.

[0011] In this embodiment, a clamping groove is provided at one end of the valve flap close to the water inlet, a hemispherical convex block is provided on the valve flap, and the clamping groove is coaxially arranged on the valve flap in an annular shape;

[0012] By adopting the above technical solution, since the side of the valve disc close to the water inlet of the valve body is set as a hemispherical extension piece, and the inner side of the valve seat is a cylindrical cavity, when the rocker arm rotates with the pin shaft, the water inlet of the valve body will not interfere with the movement of the valve disc, and the structural design is reasonable and effective.

[0013] In this embodiment, the opening and closing mechanism further includes a pin shaft, a rocker and a fixing bolt, wherein both ends of the pin shaft are rotatably connected to the valve body, one end of the rocker shaft is fixedly connected to the pin shaft, and the other end is fixedly connected to the valve disc through the fixing bolt;

[0014] Here, when the valve disc is impacted by the fluid at the water inlet, the valve disc rotates in the valve body with the pin as the center and leaves the valve seat because the two ends of the pin are rotatably connected to the valve body.

[0015] The opening and closing mechanism further comprises a sealing member, which is arranged in the clamping groove, covers the hemispherical protrusion on the valve disc, and has an extension piece extending outward from the sealing member, which is a protruding structure horizontally arranged on the side wall of the valve disc;

[0016] By adopting the above technical solution, a hemispherical protrusion is provided on the valve disc, and the sealing member on the valve disc is arranged in a spherical cap shape. When the valve disc is closed, the sealing member on the outside of the valve disc blocks the water inlet of the valve body, and at the same time, the brim-shaped extension piece of the sealing member covers the valve seat. Compared with the prior art, the contact area between the sealing member on the valve disc and the water inlet of the valve body is increased, and a gap is prevented between the valve disc and the water inlet of the valve body when particulate impurities are left at the water inlet of the valve body, thereby reducing the possibility of medium backflow.

[0017] Optionally, a mounting opening is provided at the top of the valve body, a sealing cover is provided at the top of the valve body, and the sealing cover is fixedly connected to the mounting opening at the top of the valve body by mounting bolts;

[0018] The effect of such arrangement is that the sealing cover can be installed and removed by twisting the mounting bolts on the sealing cover, making it convenient for the staff to disassemble and repair the various components inside the valve.

[0019] Optionally, flange connection plates are coaxially provided on the water inlet and the water outlet of the valve body;

[0020] The effect of such a setting is to facilitate installation of both ends of the valve body with the pipeline through the flange connection plate.

[0021] Optionally, an end cover is provided at the bottom of the valve body;

[0022] By adopting the above technical solution, the valve body can be supported and installed, and the cleaning of the valve body can be facilitated.

[0023] Furthermore, a first sealing gasket is provided between the sealing cover and the mounting opening at the top of the valve body, and a second sealing gasket is provided between the pin shaft and the end portion and the valve body;

[0024] Such an arrangement can increase the sealing performance of the valve body and prevent fluid from entering the valve body and causing leakage of the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0026] Figure 1 A structural schematic diagram of a swing check valve provided in an embodiment of the present application;

[0027] Figure 2 A side view of a swing check valve provided in an embodiment of the present application;

[0028] Figure 3 for Figure 2 A cross-sectional view of

[0029] Figure 4 for Figure 1 A left and right isometric diagram of the

[0030] Figure 5 A schematic diagram of the installation structure of a valve disc and a seal of a swing check valve provided in an embodiment of the present application.

[0031] Among them, the reference numerals in the figure are:

[0032] 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Flange connection plate; 5. Pin shaft; 6. Rocker; 7. Valve disc; 8. Clamping groove; 9. Seal; 10. Valve seat; 11. Sealing cover; 12. Mounting bolts; 13. End cover; 14. Extension piece; 15. Fixing bolts. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0039] It should be noted that, in the present application, words such as "in the present embodiment", "exemplarily", "for example", etc. are used to indicate examples, illustrations or explanations. Any embodiment or design described in the present application as "in the present embodiment", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in the present embodiment", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] Check valves are also called non-return valves. Their function is to prevent the medium in the pipeline from flowing back. The valve that opens or closes automatically by the flow and force of the medium to prevent the medium from flowing back is called a check valve. Check valves belong to the automatic valve category and are mainly used in pipelines where the medium flows in one direction, allowing the medium to flow in only one direction.

[0041] In the swing check valve in the related technology, the water flow velocity decreases at the water inlet of the valve body. At this time, particulate impurities will be left between the sealing ring on the valve disc and the water inlet of the valve body, resulting in a gap between the valve disc and the water inlet of the valve body. In severe cases, it may cause the medium to flow back, resulting in economic losses.

[0042] Based on this, in order to improve the problem of the swing check valve in the related technology that after the liquid stops flowing, the water flow velocity at the water inlet of the valve body decreases, and at this time, particulate impurities will be left on the sealing ring on the valve disc and the water inlet of the valve body, resulting in a gap between the valve disc and the water inlet of the valve body, which may cause the backflow of the medium in severe cases. The embodiment of the present application provides the following solution.

[0043] See also Figures 1 to 5A swing check valve comprises: a valve body 1, a water inlet 2 and a water outlet 3, a valve seat 10 is provided at one end of the valve body 1 close to the water inlet 2, an opening and closing mechanism is provided in the valve body 1, and the opening and closing mechanism is used to control the opening and closing of the water inlet 2 to prevent the medium from flowing back;

[0044] The opening and closing mechanism includes a valve flap 7 for controlling the opening and closing of the water inlet 2, and the opening and closing mechanism also includes a pin shaft 5, a rocker 6 and a fixing bolt 15. Both ends of the pin shaft 5 are rotatably connected to the valve body 1, one end of the rocker 6 is fixedly connected to the pin shaft 5, and the other end is fixedly connected to the valve flap 7 through the fixing bolt 15;

[0045] With such arrangement, when the valve disc 7 is impacted by the fluid at the water inlet 2, since both ends of the pin shaft 5 are rotatably connected to the valve body 1, the valve disc 7 rotates in the valve body 1 with the pin shaft 5 as the center of the circle and separates from the valve seat 10. Since one end of the rocker 6 is fixedly connected to the pin shaft 5 and the other end is fixedly connected to the valve disc 7 by the fixing bolt 15, when the fluid in the pipeline enters the valve body 1 from the water inlet 2 of the valve body 1, the valve disc 7 rotates toward the sealing cover 11 under the impact of the fluid at the water inlet 2.

[0046] The opening and closing mechanism further includes a sealing member 9, which is disposed in the clamping groove 8, and covers the hemispherical protrusion on the valve flap 7. The sealing member 9 has an extension piece 14 extending outward, and the extension piece 14 is a protruding structure horizontally disposed on the side wall of the valve flap 7;

[0047] The effect of such arrangement is that, by providing a hemispherical protrusion on the valve flap 7, and setting the sealing member 9 on the valve flap 7 to be in a spherical cap shape, and the sealing member 9 covers the protrusion, when the valve flap 7 is closed, the sealing member 9 on the outside of the valve flap 7 blocks the water inlet 2 of the valve body 1, and at the same time, the brim-shaped extension piece 14 of the sealing member 9 covers the valve seat 10, thereby increasing the contact area between the sealing member 9 on the valve flap 7 and the water inlet 2 of the valve body 1 compared with the prior art, thereby preventing a gap from being left between the valve flap 7 and the water inlet 2 of the valve body 1 when particulate impurities are left at the water inlet 2 of the valve body 1, thereby reducing the possibility of medium backflow.

[0048] See also Figure 3 and Figure 5 A clamping groove 8 is provided at one end of the valve flap 7 close to the water inlet 2, and a hemispherical convex block is provided on the valve flap 7. The clamping groove 8 is coaxially arranged on the valve flap 7 in an annular shape;

[0049] The effect of such arrangement is that the sealing cover 11 can be installed and removed by twisting the installation bolts 12 on the sealing cover 11 , which makes it convenient for the staff to disassemble and repair the components in the valve body 1 .

[0050] See also Figure 1 and Figure 3A mounting opening is provided on the top of the valve body 1, a sealing cover 11 is provided on the top of the valve body 1, and the sealing cover 11 is fixedly connected to the mounting opening on the top of the valve body 1 by mounting bolts 12;

[0051] The effect of such a configuration is to facilitate installation of both ends of the valve body 1 with the pipeline via the flange connection plate 4 .

[0052] See also Figure 1 and Figure 2 , a flange connection plate 4 is coaxially provided on the water inlet 2 and the water outlet 3 of the valve body 1, and an end cover 13 is provided at the bottom of the valve body 1;

[0053] The effect of such a configuration is that it is convenient to install the two ends of the valve body 1 with the pipeline through the flange connection plate 4. At the same time, an end cover 13 is provided at the bottom of the valve body 1 for supporting and installing the valve body 1 and facilitating cleaning of the inside of the valve body 1.

[0054] See also Figure 1 and Figure 3 A first sealing gasket is provided between the sealing cover 11 and the top mounting opening of the valve body 1, and a second sealing gasket is provided between the pin shaft 5 and the end portion and the valve body 1;

[0055] Such an arrangement can increase the sealing performance of the valve body 1 and prevent the fluid from entering the valve body 1 and causing leakage of the fluid.

[0056] From the above, we can see that the working principle of this application is as follows:

[0057] The water inlet 2 and the water outlet 3 at both ends of the valve body 1 are connected to two sections of pipelines respectively. When the fluid in the pipeline enters the valve body 1 from the water inlet 2 of the valve body 1, the pin 5 drives the rocker 6 and the valve disc 7 to rotate under the impact of the fluid. Since the side of the valve disc 7 close to the valve seat 10 is provided with a hemispherical extension piece 14, and the valve seat 10 is a cylindrical cavity, when the rocker 6 rotates with the pin 5, the water inlet 2 of the valve body 1 will not interfere with the movement of the valve disc 7;

[0058] And the side of the valve flap 7 close to the water inlet 2 of the valve body 1 is set to a hemispherical extension piece 14, and the sealing piece 9 on the valve flap 7 is set to a spherical cap shape. When the fluid stops entering the valve body 1, when the external force and the self-gravity of the valve flap 7 close to the water outlet 3 are greater than the external force of the valve flap 7 close to the water inlet 2, the valve flap 7 is closed. At this time, the sealing piece 9 on the outside of the valve flap 7 cooperates with the valve seat 10 to block the water inlet 2 of the valve body 1. At the same time, the brim extension piece 14 of the sealing piece 9 covers the end of the valve seat 10. Compared with the prior art, the contact area between the sealing piece 9 on the valve flap 7 and the water inlet 2 of the valve body 1 is increased, and the hemispherical extension piece 14 will push away the granular impurities in the cylindrical cavity of the water inlet 2 of the valve body 1 to a certain extent.

[0059] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A swing check valve, comprising: A valve body (1), a water inlet (2) and a water outlet (3), characterized in that a valve seat (10) is provided at one end of the valve body (1) close to the water inlet (2), an opening and closing mechanism is provided inside the valve body (1), and the opening and closing mechanism includes a valve flap (7) for controlling the opening and closing of the water inlet (2).

2. A swing check valve according to claim 1, characterized in that: A clamping groove (8) is provided at one end of the valve flap (7) close to the water inlet (2), a hemispherical convex block is provided on the valve flap (7), and the clamping groove (8) is coaxially arranged on the valve flap (7) in an annular shape.

3. A swing check valve according to claim 2, characterized in that: The opening and closing mechanism also includes: A pin shaft (5), a rocker arm (6) and a fixing bolt (15), wherein both ends of the pin shaft (5) are rotatably connected to the valve body (1), one end of the rocker arm (6) is fixedly connected to the pin shaft (5), and the other end is fixedly connected to the valve disc (7) via the fixing bolt (15); A sealing member (9), wherein the sealing member (9) is arranged in the clamping groove (8), the sealing member (9) covers the hemispherical protrusion on the valve flap (7), and the sealing member (9) has an extension piece (14) extending outward, and the extension piece (14) is a protruding structure horizontally arranged on the side wall of the valve flap (7).

4. A swing check valve according to claim 3, characterized in that: The top of the valve body (1) is provided with a mounting opening, the top of the valve body (1) is provided with a sealing cover (11), and the sealing cover (11) is fixedly connected to the mounting opening at the top of the valve body (1) via mounting bolts (12).

5. A swing check valve according to claim 1, characterized in that: A flange connection plate (4) is coaxially provided on the water inlet (2) and the water outlet (3) of the valve body (1).

6. A swing check valve according to claim 1, characterized in that: An end cover (13) is provided at the bottom of the valve body (1).

7. A swing check valve according to claim 4, characterized in that: A first sealing gasket is provided between the sealing cover (11) and the top mounting opening of the valve body (1), and a second sealing gasket is provided between the end of the pin shaft (5) and the valve body (1).

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