Swing check valve

Abstract

The utility model discloses a swing check valve, which relates to the technical field of valves, and comprises a valve body, one side of the inner wall of the valve body is fixedly connected with a feed port, the inside of the valve body is also rotatably connected with a valve cover, the valve cover is fixedly connected with a first sealing ring, and the first sealing ring is provided with a buffer unit; the buffer unit comprises a corrugated sleeve fixedly connected to the first sealing ring, the other end of the corrugated sleeve is fixedly connected with a second sealing ring, and the side wall of the first sealing ring is fixedly connected with a first butt joint ring. According to the utility model, the problems that the valve is opened for the second time and the backflow is easily caused due to the fact that a reset structure of a spring is adopted for buffering and damping in the prior art and the spring is stressed to rebound when the valve is closed are effectively solved, and the purposes of buffering and sealing the valve when the valve is opened and closed are achieved. Secondary opening of the valve caused by springback is avoided, and the sealing effect of the check valve is guaranteed.

Description

Technical Field

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

[0002] A check valve is an automatic valve used to prevent the backflow of media in a pipeline. When the media in the pipeline flows forward, the valve disc opens under the action of the media force; when the input of the media stops, the valve disc automatically closes due to its own gravity and other factors to prevent the backflow of the media. When the valve disc rotates and falls, it often hits the valve seat. In the long run, it will damage the valve body and valve disc, resulting in a reduction in the service life of the valve.

[0003] For example, a Chinese patent with publication number CN219796321U, a swing check valve, including a valve body, a valve cover, a rocker, a valve disc and a valve seat; a buffer mechanism is provided on the valve seat, the buffer mechanism includes a mounting ring, a buffer ring and a plurality of reset components arranged between the mounting ring and the buffer ring, the mounting ring is mounted on the valve seat, the buffer ring is axially slidably arranged inside the valve seat, the reset component includes a guide rod and a reset spring, a plurality of screw holes equivalent to the number of the guide rod are provided at one end of the mounting ring close to the buffer ring, a plurality of guide holes are provided at one end of the buffer ring close to the mounting ring, a threaded portion is provided at one end of the guide rod, the threaded portion is threadedly connected to the corresponding screw hole, the other end of the guide rod is inserted into the corresponding guide hole, the reset spring is sleeved on the outer periphery of the guide rod, and the two ends of the reset spring are respectively against the mounting ring and the buffer ring. The utility model realizes the slow closing effect of the valve disc by arranging a buffer mechanism on the valve seat, thereby protecting the valve seat and the valve disc, thereby improving the service life of the valve.

[0004] There are certain defects when using the above method. During the use of the above method, a spring reset structure is used to buffer and reduce shock. However, when the valve is closed, the spring will rebound under force, causing the valve to open again, which may easily lead to backflow and affect the use of the check valve. Therefore, the present application provides a swing check valve to meet the needs. Utility Model Content

[0005] The purpose of the present application is to provide a swing check valve, which solves the problem that the prior art uses a spring reset structure to provide buffering and shock absorption, but when the valve is closed, the spring will be forced to rebound, causing the valve to open again, which is easy to cause backflow. The present application achieves the purpose of being able to buffer during opening and closing, and to seal it, to avoid rebound causing the valve to open again, thereby ensuring the sealing effect of the check valve.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solution: a swing check valve, comprising a valve body, a feed port is fixedly connected to one side of the inner wall of the valve body, a valve cover is rotatably connected to the inside of the valve body, a first sealing ring is fixedly connected to the valve cover, and a buffer unit is arranged on the first sealing ring;

[0007] The buffer unit includes a bellows sleeve fixedly connected to the first sealing ring, the other end of the bellows sleeve is fixedly connected to the second sealing ring, and a first docking ring is fixedly connected to the side wall of the first sealing ring, and one end of the second sealing ring is fixedly connected to the second docking ring, and a spring is arranged inside the bellows sleeve.

[0008] Preferably, two ends of the spring respectively contact with inner walls of the first sealing ring and the second sealing ring.

[0009] Preferably, the second sealing ring is slidably connected to the inner ring of the first docking ring.

[0010] Preferably, a sealing block is fixedly connected to the inner wall of the feed port, and a sealing head is provided on the side wall of the sealing block, and the sealing head is in contact with the second sealing ring.

[0011] Preferably, a rotating shaft is fixedly connected to the interior of the valve body, and the valve cover is rotatably connected to the rotating shaft.

[0012] Preferably, a rubber sleeve is also sleeved on the second sealing ring.

[0013] Preferably, a plurality of sealing grooves are provided on the sealing head.

[0014] In summary, the technical effects and advantages of the utility model are:

[0015] The utility model has a reasonable structure. Through the buffer unit provided, the second sealing ring on the valve cover will first collide with the sealing block, and then the second sealing ring will transmit the force to the spring. The spring will expand and contract, and the second sealing ring will slide inside the first docking ring for guidance. At the same time, the bellows will expand and contract synchronously for buffering release. The force is released, and the first sealing ring on the valve cover continues to be inserted into the interior of the feed port, so as to close the feed port, avoiding the risk of the valve cover being opened a second time due to the reaction force of the spring, and the sealing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, 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 those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partially cutaway three-dimensional structural schematic diagram of the valve body in the utility model;

[0019] Figure 3 It is an enlarged three-dimensional structural schematic diagram of the feed port in the utility model;

[0020] Figure 4 It is an enlarged three-dimensional structural schematic diagram of the valve cover in the utility model.

[0021] In the figure: 1. valve body; 2. feed inlet; 3. sealing block; 4. sealing head; 5. valve cover; 6. first sealing ring; 7. bellows; 8. second sealing ring; 9. first docking ring; 10. second docking ring; 11. spring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the embodiments of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms are not directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0027] Example: Reference Figure 1-4 The swing check valve shown comprises a valve body 1, a feed port 2 is fixedly connected to one side of the inner wall of the valve body 1, a valve cover 5 is rotatably connected to the inside of the valve body 1, a rotating shaft is fixedly connected to the inside of the valve body 1, and the valve cover 5 is rotatably connected to the rotating shaft, a first sealing ring 6 is fixedly connected to the valve cover 5, and a buffer unit is provided on the first sealing ring 6;

[0028] The buffer unit includes a corrugated sleeve 7 fixedly connected to the first sealing ring 6, the other end of the corrugated sleeve 7 is fixedly connected to the second sealing ring 8, the second sealing ring 8 is also sleeved with a rubber sleeve, the rubber sleeve arranged on the second sealing ring 8 can improve the sealing effect, and the side wall of the first sealing ring 6 is fixedly connected to the first docking ring 9, and one end of the second sealing ring 8 is fixedly connected to the second docking ring 10, a spring 11 is arranged inside the corrugated sleeve 7, the two ends of the spring 11 are respectively in conflict with the inner walls of the first sealing ring 6 and the second sealing ring 8, the second sealing ring 8 is slidably connected to the inner ring of the first docking ring 9, the inner wall of the feed port 2 is fixedly connected to the sealing block 3, and the side wall of the sealing block 3 is provided with a sealing head 4, and the sealing head 4 is in contact with the second sealing ring 8, and a plurality of sealing grooves are provided on the sealing head 4, and the opening of the sealing groove If the sealing effect is better, it can be sealed multiple times. When the valve body 1 is conveyed, the water flow will lift up the valve cover 5, and the valve cover 5 will rotate upward along the rotating shaft to open, and then conveying will be carried out. When the conveying stops, the valve cover 5 loses the resisting force and naturally falls and rotates downward to dock with the feed port 2. The second sealing ring 8 on the valve cover 5 will first collide with the sealing block 3, and then the second sealing ring 8 will transfer the force to the spring 11, the spring 11 will expand and contract, and the second sealing ring 8 will slide inside the first docking ring 9 for guidance. At the same time, the bellows sleeve 7 will synchronously expand and contract for buffering release. The force is released, and the first sealing ring 6 on the valve cover 5 continues to be inserted into the interior of the feed port 2, so as to close the feed port 2, avoiding the risk of the valve cover 5 opening twice due to the reaction force of the spring 11, and the sealing effect is good.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A swing check valve, comprising a valve body (1), characterized in that: A feed port (2) is fixedly connected to one side of the inner wall of the valve body (1), a valve cover (5) is rotatably connected to the interior of the valve body (1), a first sealing ring (6) is fixedly connected to the valve cover (5), and a buffer unit is provided on the first sealing ring (6); The buffer unit comprises a bellows sleeve (7) fixedly connected to the first sealing ring (6), the other end of the bellows sleeve (7) being fixedly connected to a second sealing ring (8), a first docking ring (9) being fixedly connected to the side wall of the first sealing ring (6), and a second docking ring (10) being fixedly connected to one end of the second sealing ring (8), and a spring (11) being arranged inside the bellows sleeve (7).

2. The swing check valve according to claim 1, characterized in that: The two ends of the spring (11) respectively contact the inner walls of the first sealing ring (6) and the second sealing ring (8).

3. The swing check valve according to claim 1, characterized in that: The second sealing ring (8) is slidably connected to the inner ring of the first docking ring (9).

4. The swing check valve according to claim 1, characterized in that: A sealing block (3) is fixedly connected to the inner wall of the feed port (2), and a sealing head (4) is provided on the side wall of the sealing block (3), and the sealing head (4) is in contact with the second sealing ring (8).

5. The swing check valve according to claim 1, characterized in that: A rotating shaft is fixedly connected inside the valve body (1), and the valve cover (5) is rotatably connected to the rotating shaft.

6. The swing check valve according to claim 1, characterized in that: The second sealing ring (8) is also sleeved with a rubber sleeve.

7. The swing check valve according to claim 4, characterized in that: The sealing head (4) is provided with a plurality of sealing grooves.

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