Large-diameter check valve

Abstract

The check valve comprises a valve body, a blocking table is arranged in the valve body, a sliding groove is formed in the inner wall of the valve body and located in the left side of the blocking table, a valve clack is arranged in the valve body, a sliding rod is fixedly connected to the outer wall of the valve clack, the sliding rod is located in the sliding groove, and the sliding rod is fixedly connected to the outer wall of the valve clack and located in the sliding groove. Flange pieces are welded to the two ends of the valve body. The check valve has the advantage of being good in check effect.

Description

Technical Field

[0001] This invention relates to the field of check valves, and in particular to a large-diameter check valve. Background Technology

[0002] Check valves are fundamental components in fluid control engineering and have a wide range of applications. They protect other fluid machinery and pipelines by preventing backflow. However, the backflow prevention effect of existing check valves is not ideal.

[0003] Therefore, it is essential to design a large-diameter check valve with good backflow prevention performance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing check valves do not have a very ideal check function.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a large-diameter check valve, the check valve including a valve body, a baffle provided inside the valve body, a slide groove provided on the inner wall of the valve body, the slide groove being located on the left side of the baffle, a valve disc provided inside the valve body, a slide rod fixedly connected to the outer wall of the valve disc, the slide rod being located inside the slide groove, and flanges welded to both ends of the valve body.

[0006] The bottom of the slide bar is provided with a groove, and a ball is rotatably connected inside the groove, with the ball in contact with the groove.

[0007] The baffle has an air chamber inside, which is connected to the slide groove. A push plate is installed inside the air chamber. A push rod is fixedly connected to the left side of the push plate. The other end of the push rod is fixedly connected to the side wall of the slide rod. A bladder groove is opened on the left side of the baffle. An air bladder is fixed inside the bladder groove. The right end of the air chamber is connected to the air bladder.

[0008] The baffle has a micro-control cavity inside, which is connected between the air cavity and the airbag. Two through holes are opened on the left side of the micro-control cavity, referred to as the large through hole and the small through hole. A plug ball is installed inside the micro-control cavity, which is located to the right of the large through hole. Both ends of the plug ball are fixedly connected to elastic bands, and the other end of the elastic bands is fixedly connected to the inner wall of the micro-control cavity.

[0009] A spring is installed inside the slide groove. One end of the spring abuts against the right wall of the slide groove, and the other end of the spring is fixedly connected to the right side of the slide rod.

[0010] The right side of the barrier has an arc-shaped design.

[0011] The beneficial effects of this invention are as follows:

[0012] The flange is fixed to the pipeline by means of a sliding rod, an air bladder, and a ball stopper. The medium flows from right to left in the valve body. When the medium flows from right to left, the valve disc is pushed open, allowing normal flow. When the medium flows from left to right (causing backflow), the valve disc is pushed against the baffle, thus fitting against the left side of the baffle to block the medium and prevent backflow. When the valve disc needs to move left or right, the sliding rod moves accordingly within the sliding groove. The rolling of the ball reduces sliding friction, making the valve disc move more smoothly. When the valve disc is pushed to the right, it drives the push rod to move accordingly, at which point the push plate... This pushes the gas in the air chamber into the airbag, causing the airbag to inflate and providing a seal when the valve needs to cooperate with the baffle for check valve operation. The elastic band always pulls the stopper ball to the left, blocking the large through hole. When the valve moves to the left, the push plate moves to the left as well, and the stopper ball is blown open. The gas in the airbag enters the micro-control chamber through both the small and large through holes, and then enters the air chamber. When the valve moves to the right (when the check valve is closed), the gas in the air chamber enters the micro-control chamber and can only enter the airbag through the small through hole. This makes the valve open quickly and close slowly, preventing damage to the valve from rapid closure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the side-section three-dimensional structure of the present invention;

[0015] Figure 3 This is a partially enlarged structural diagram of region A of the present invention;

[0016] Figure 4 This is a partially enlarged structural diagram of region B of the present invention;

[0017] Figure 5 This is a schematic diagram of the internal structure of the micro-controlled cavity of the present invention.

[0018] In the diagram: 1. Valve body; 2. Baffle; 3. Slide groove; 4. Valve disc; 5. Slide rod; 6. Flange; 7. Roller groove; 8. Ball bearing; 9. Air chamber; 10. Push plate; 11. Push rod; 12. Sac groove; 13. Micro-control chamber; 14. Plug ball; 15. Elastic band; 16. Spring. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0020] Please see Figure 1-5The check valve includes a valve body 1, with a baffle 2 inside the valve body 1. A groove 3 is formed on the inner wall of the valve body 1, located on the left side of the baffle 2. A valve disc 4 is also inside the valve body 1, with a sliding rod 5 fixedly connected to the outer wall of the valve disc 4, located inside the groove 3. Flanges 6 are welded to both ends of the valve body 1. The flanges 6 are fixed to the pipeline. The flow direction of the medium in the valve body 1 is from right to left. When the medium flows from right to left, the valve disc 4 is pushed open, and the medium flows normally. When the medium flows from left to right (causing backflow), the valve disc 4 is pushed against the baffle 2, thus fitting against the left side of the baffle 2 to block the medium and prevent backflow.

[0021] The bottom of the slide rod 5 is provided with a groove 7, and a ball bearing 8 is rotatably connected inside the groove 7. The ball bearing 8 is in contact with the slide groove 3. When the valve disc 4 needs to move left and right, the slide rod 5 will move accordingly in the slide groove 3. The rolling of the ball bearing 8 can reduce the sliding friction and make the valve disc 4 move more smoothly.

[0022] The baffle 2 has an air chamber 9 inside, which is connected to the slide groove 3. The air chamber 9 has a push plate 10 inside, and a push rod 11 is fixedly connected to the left side of the push plate 10. The other end of the push rod 11 is fixedly connected to the side wall of the slide rod 5. The baffle 2 has a bladder groove 12 on the left side, and an air bladder is fixed inside the bladder groove 12. The right end of the air chamber 9 is connected to the air bladder. When the valve disc 4 is pushed to the right, it drives the push rod 11 to move accordingly. At this time, the push plate 10 will push the gas in the air chamber 9 into the air bladder, causing the air bladder to expand. This will play a sealing role when the valve disc 4 needs to cooperate with the baffle 2 to perform a check valve.

[0023] The baffle 2 has a micro-control chamber 13 inside, which connects the air chamber 9 and the airbag. The left side of the micro-control chamber 13 has two through holes, referred to as the large through hole and the small through hole. The micro-control chamber 13 has a stop ball 14 inside, which is located to the right of the large through hole. The two ends of the stop ball 14 are fixedly connected to the elastic band 15, and the other end of the elastic band 15 is fixedly connected to the inner wall of the micro-control chamber 13. The elastic band 15 always pulls the stop ball 14 to the left, so that it blocks the large through hole. When the valve disc 4 moves to the left, the push plate 10 moves to the left as well. At this time, the stop ball 14 will be blown open, and the gas in the airbag will enter the micro-control chamber 13 along the small through hole and the large through hole, and then enter the air chamber 9. When the valve disc 4 moves to the right (when the check valve is closed), the gas in the air chamber 9 enters the micro-control chamber 13 and can only enter the airbag through the small through hole, so that the valve disc 4 opens quickly and closes slowly, preventing damage to the valve disc 4 by rapid closure.

[0024] A spring 16 is installed inside the slide groove 3. One end of the spring 16 abuts against the right wall of the slide groove 3, and the other end of the spring 16 is fixedly connected to the right side of the slide rod 5. The spring 16 always pulls the slide rod 5 to the right, so that the valve disc 4 is in the closed state in the initial state, and the valve disc 4 will not open when the pressure is insufficient.

[0025] The right side of the baffle 2 is arc-shaped; if the right side of the baffle 2 were a right angle, it would block part of the medium. The arc-shaped design of the right side of the baffle 2 allows the medium to pass through the baffle 2 after entering the valve body 1.

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A large bore check valve characterized by: The check valve includes a valve body (1), a baffle (2) is provided inside the valve body (1), a slide groove (3) is provided on the inner wall of the valve body (1), the slide groove (3) is located on the left side of the baffle (2), a valve disc (4) is provided inside the valve body (1), a slide rod (5) is fixedly connected to the outer wall of the valve disc (4), the slide rod (5) is located inside the slide groove (3), and flanges (6) are welded to both ends of the valve body (1).

2. The large bore check valve of claim 1, wherein: The bottom of the slide bar (5) is provided with a roller groove (7), and a ball (8) is rotatably connected inside the roller groove (7), and the ball (8) is in contact with the slide groove (3).

3. The large bore check valve of claim 1, wherein: The baffle (2) has an air chamber (9) inside, which is connected to the slide groove (3). The air chamber (9) has a push plate (10) inside, and a push rod (11) is fixedly connected to the left side of the push plate (10). The other end of the push rod (11) is fixedly connected to the side wall of the slide rod (5). The baffle (2) has a bladder groove (12) on the left side, and an air bladder is fixed inside the bladder groove (12). The right end of the air chamber (9) is connected to the air bladder.

4. The large orifice check valve of claim 1, wherein: The baffle (2) is provided with a micro-control cavity (13), which is connected between the air cavity (9) and the airbag. Two kinds of through holes are opened on the left side of the micro-control cavity (13), referred to as the large through hole and the small through hole. A plug ball (14) is provided inside the micro-control cavity (13). The plug ball (14) is located on the right side of the large through hole. The two ends of the plug ball (14) are fixedly connected to elastic bands (15), and the other end of the elastic bands (15) is fixedly connected to the inner wall of the micro-control cavity (13).

5. The large orifice check valve of claim 1, wherein: A spring (16) is provided inside the slide groove (3). One end of the spring (16) abuts against the right wall of the slide groove (3), and the other end of the spring (16) is fixedly connected to the right side of the slide rod (5).

6. The large orifice check valve of claim 1, wherein: The right side of the baffle (2) is arc-shaped.

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