Micro check valve safety shut down linkage

Abstract

The utility model discloses a kind of micro-resistance return valve safety closing linkage device, belong to micro-resistance return valve technical field, including valve body, the inner wall of valve body is provided with valve passage, the top of valve body is provided with avoidance box, one end of the valve passage is fixedly connected with two rotating bases, two rotating bases are fixedly sleeved with rotating base shaft. In the utility model, when there is fluid flow in valve body, the fluid in valve passage inner cavity is used to push valve flap to overturn upwards, while the arc piston rod of valve flap side portion slides in arc tube, so that the air in arc tube inner cavity is pushed into air bag, so that air bag is expanded, while fluid pushes push plate to move, using push plate to drive telescopic rod, support column moves, so that support column moves to the below of valve flap and sealing gasket contact, so as to support valve flap and sealing gasket, guarantee the stability of valve flap opening.

Description

Technical Field

[0001] This utility model relates to the field of micro anti-return valve technology, and more specifically, to a micro anti-return valve safety closing linkage device. Background Technology

[0002] A check valve, also known as a non-return valve, is used to prevent backflow of media in pipelines. As an automatic valve, it is primarily used in pipelines where media flow in one direction only, preventing accidents. The working principle of a check valve is quite unique; its opening and closing are not manually operated, but rather achieved through the flow and pressure of the media itself. When the media flows in the preset direction, the check valve automatically opens, allowing the media to pass smoothly. However, if the pressure or flow rate in the pipeline changes, causing the media to attempt backflow, the check valve immediately closes, preventing this abnormal backflow. As an automatic valve, check valves are widely used in pipeline systems requiring unidirectional media flow, such as preventing steam backflow and liquid backflow, to ensure the safe operation of the pipeline system and avoid equipment damage or accidents caused by backflow. Therefore, check valves play a crucial role in industrial production, ensuring the continuity and stability of processes.

[0003] However, existing micro anti-return valves are not easy to close safely when the medium is not flowing. Therefore, we propose a micro anti-return valve safety closing linkage device. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a micro-blocking return valve safety shut-off linkage device.

[0005] To solve the above problems, this utility model adopts the following technical solution: a micro-blocking return valve safety closing linkage device, including a valve body, a valve channel provided on the inner wall of the valve body, a clearance box provided on the top of the valve body, two rotating bases fixedly connected to one end of the valve channel, rotating base shafts fixedly sleeved on the two rotating bases, a rotating seat rotatably connected to the outer side of the rotating base shafts, a valve disc fixedly connected to the bottom end of the rotating seat, a sealing gasket fixedly connected to the side of the valve disc, the side of the sealing gasket fitting against the end face of the valve channel, an air storage tank fixedly connected to the top of the valve body, an arc-shaped tube fixedly connected to the side of the air storage tank, the end of the arc-shaped tube fixedly sleeved into the inner cavity of the clearance box, an air bladder provided in the inner cavity of the air storage tank, the end of the air bladder connected to the other end of the arc-shaped tube, an arc-shaped piston rod fixedly connected to the side of the valve disc, the end of the arc-shaped piston rod movably sleeved into the inner cavity of the arc-shaped tube, a support mechanism provided on the valve channel, and a slow-closing mechanism provided on the valve channel.

[0006] As a preferred embodiment of this utility model, the support mechanism includes a telescopic groove formed at one end of the valve channel, a spring fixedly connected to one end of the inner cavity of the telescopic groove, a support column fixedly connected to the end of the spring, the side of the support column fitting against the inner wall of the telescopic groove, a telescopic rod fixedly connected to one end of the support column, and a push plate fixedly connected to the end of the telescopic rod movably sleeved to the outside of the valve channel.

[0007] As a preferred embodiment of this utility model, the slow-closing mechanism includes a receiving groove at the end of the valve channel and a fluid push groove inside the valve channel. One end of the inner cavity of the fluid push groove has an inlet hole, the end of which is connected to the other end of the valve channel. The other end of the inner cavity of the fluid push groove has a vent hole, the end of which is connected to the inner cavity of the receiving groove. A piston block is slidably connected to the inner cavity of the fluid push groove. A connecting rod is fixedly connected to the end of the piston block. The end of the connecting rod is movably sleeved into the inner cavity of the receiving groove and fixedly connected to a rubber block.

[0008] As a preferred embodiment of this utility model, the valve body is fixedly sleeved with connecting flanges at both ends, and the gas storage box is hinged with a box door on the outside.

[0009] In a preferred embodiment of this invention, the inner diameter of the arc-shaped tube and the outer diameter of the arc-shaped piston rod are equal.

[0010] In a preferred embodiment of this invention, the side of the piston block is in contact with the inner wall of the fluid push groove.

[0011] The advantages of this utility model are: (1) In this utility model, when there is fluid flowing in the valve body, the fluid in the inner cavity of the valve channel pushes the valve disc to flip upward, and at the same time, the arc-shaped piston rod on the side of the valve disc slides in the arc-shaped tube, thereby pushing the air in the inner cavity of the arc-shaped tube into the air bag, causing the air bag to expand. At the same time, the fluid pushes the push plate to move, and the push plate drives the telescopic rod and support column to move, so that the support column moves to the bottom of the valve disc and contacts the sealing gasket, thereby supporting the valve disc and the sealing gasket and ensuring the stability of the valve disc opening.

[0012] (2) In this utility model, when the fluid stops flowing, the push plate is no longer impacted by the fluid. The restoring force of the spring drives the support column to return to the inner cavity of the telescopic groove, so that the valve disc is no longer supported. In addition, the gas that expands in the inner cavity of the airbag re-enters the inner cavity of the arc tube, thereby pushing the arc piston rod to move outward, which in turn drives the valve disc to flip downward. At the same time, with the return of some fluid, the valve disc flips downward and returns to its original position, ensuring that the valve disc closes the valve passage in the inner cavity of the valve body. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0014] Figure 2 is a schematic cross-sectional view of the present invention.

[0015] Figure 3 is a schematic diagram of the valve body of this utility model.

[0016] Figure 4 is a schematic diagram of the valve disc of this utility model.

[0017] Figure 5 is an enlarged schematic diagram of point A in Figure 2 of this utility model.

[0018] Figure 6 is an enlarged schematic diagram of section B in Figure 2 of this utility model.

[0019] The following are the labels in the diagram: 1. Valve body; 2. Valve passage; 3. Clearance box; 4. Rotating base; 5. Rotating base shaft; 6. Rotating seat; 7. Valve disc; 8. Air tank; 9. Arc-shaped tube; 10. Air bladder; 11. Arc-shaped piston rod; 12. Sealing gasket; 13. Door; 14. Support mechanism; 15. Slow-closing mechanism; 16. Connecting flange; 17. Telescopic groove; 18. Spring; 19. Support column; 20. Telescopic rod; 21. Push plate; 22. Fluid push groove; 23. Collection groove; 24. Inlet hole; 25. Piston block; 26. Connecting rod; 27. Vent hole; 28. Rubber block. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0023] Please refer to Figures 1-6. A micro-blocking return valve safety closing linkage device includes a valve body 1. A valve channel 2 is provided on the inner wall of the valve body 1. A clearance box 3 is provided on the top of the valve body 1. Two rotating bases 4 are fixedly connected to one end of the valve channel 2. A rotating base shaft 5 is fixedly sleeved on the two rotating bases 4. A rotating seat 6 is rotatably connected to the outer side of the rotating base shaft 5. A valve disc 7 is fixedly connected to the bottom end of the rotating seat 6. A sealing gasket 12 is fixedly connected to the side of the valve disc 7. The side of the sealing gasket 12 is in contact with the end face of the valve channel 2. An air storage tank 8 is fixedly connected to the top of the valve body 1. An arc-shaped tube 9 is fixedly connected to the side of the air storage tank 8. The end of the arc-shaped tube 9 is fixedly sleeved into the inner cavity of the clearance box 3. An air bladder 10 is provided in the inner cavity of the air storage tank 8. The end of the air bladder 10 is connected to the other end of the arc-shaped tube 9. An arc-shaped piston rod 11 is fixedly connected to the side of the valve disc 7. The end of the valve is movably sleeved into the inner cavity of the arc-shaped tube 9. A support mechanism 14 is provided on the valve channel 2, and a slow-closing mechanism 15 is provided on the valve channel 2.

[0024] In this embodiment, the upward-flipping valve disc 7 is placed using the clearance box 3.

[0025] Specifically, please refer to Figure 5. The support mechanism 14 includes a telescopic groove 17 opened at one end of the valve channel 2. A spring 18 is fixedly connected to one end of the inner cavity of the telescopic groove 17. A support column 19 is fixedly connected to the end of the spring 18. The side of the support column 19 fits against the inner wall of the telescopic groove 17. A telescopic rod 20 is fixedly connected to one end of the support column 19. The end of the telescopic rod 20 is movably sleeved to the outside of the valve channel 2 and fixedly connected to a push plate 21.

[0026] Specifically, please refer to Figure 6. The slow-closing mechanism 15 includes a receiving groove 23 opened at the end of the valve channel 2 and a fluid push groove 22 disposed inside the valve channel 2. One end of the inner cavity of the fluid push groove 22 is provided with an inlet hole 24, the end of the inlet hole 24 is connected to the other end of the valve channel 2, and the other end of the inner cavity of the fluid push groove 22 is provided with a vent hole 27, the end of the vent hole 27 is connected to the inner cavity of the receiving groove 23. A piston block 25 is slidably connected to the inner cavity of the fluid push groove 22, and a connecting rod 26 is fixedly connected to the end of the piston block 25. The end of the connecting rod 26 is movably sleeved into the inner cavity of the receiving groove 23 and fixedly connected with a rubber block 28.

[0027] In this embodiment, the inner diameter of the inlet hole 24 is smaller than the inner diameter of the fluid pusher 22, ensuring that the fluid filled into the inner cavity of the fluid pusher 22 can only be slowly discharged from the inlet hole 24.

[0028] Specifically, please refer to Figure 1. Connecting flanges 16 are fixedly sleeved at both ends of the valve body 1, and a door 13 is hinged to the outside of the gas storage tank 8.

[0029] In this embodiment, the valve body 1 is installed via the connecting flange 16, and the airbag 10 can be repaired or replaced by opening the box door 13.

[0030] Specifically, please refer to Figure 2. The inner diameter of the arc-shaped tube 9 is equal to the outer diameter of the arc-shaped piston rod 11.

[0031] In this embodiment, the arc-shaped piston rod 11 is guaranteed to seal the inner cavity of the arc-shaped tube 9.

[0032] Specifically, please refer to Figure 6, where the side of the piston block 25 is in contact with the inner wall of the fluid push groove 22.

[0033] In this embodiment, the piston block 25 is designed to seal and separate the inner cavity of the fluid push groove 22.

[0034] Working principle: In use, fluid first enters from one end of valve body 1, flowing through valve passage 2, which pushes valve disc 7 upward. Simultaneously, the arc-shaped piston rod 11 on the side of valve disc 7 slides in arc-shaped tube 9, pushing air from the inner cavity of arc-shaped tube 9 into air bladder 10, causing air bladder 10 to inflate. Then, the fluid pushes push plate 21 to move, which in turn moves telescopic rod 20 and support column 19, causing support column 19 to move below valve disc 7 and contact sealing gasket 12, thus supporting valve disc 7 and sealing gasket 12. At the same time, spring 18 is stretched. Another portion of fluid enters the inner cavity of fluid push groove 22 from inlet hole 24, pushing piston block 25 to move within fluid push groove 22. Piston block 25 then moves connecting rod 26 and rubber block 28 into the inner cavity of valve body 1. Finally, when the fluid stops flowing, push plate 21... No longer impacted by the fluid, the restoring force of the spring 18 drives the support column 19 to return to the inner cavity of the telescopic groove 17, thus no longer supporting the valve disc 7. In addition, the gas that expands in the inner cavity of the airbag 10 re-enters the inner cavity of the arc-shaped tube 9, thereby pushing the arc-shaped piston rod 11 to move outward, which in turn drives the valve disc 7 to flip downward. At the same time, with the return of some fluid, the valve disc 7 flips downward until it contacts the end of the rubber block 28. Finally, the return fluid continues to push the side of the valve disc 7, thereby pushing the rubber block 28 and the connecting rod 26 to return to their original positions. At the same time, the piston block 25 pushes the fluid in the inner cavity of the fluid push groove 22 to slowly discharge from the inlet hole 24 until the sealing gasket 12 on the side of the valve disc 7 contacts the end face of the valve channel 2, thereby closing the check valve.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A micro-resistance valve safety closing linkage device, comprising a valve body (1), characterized in that: The valve body (1) has a valve channel (2) on its inner wall and a clearance box (3) on its top. Two rotating bases (4) are fixedly connected to one end of the valve channel (2). Rotating base shafts (5) are fixedly sleeved on the two rotating bases (4). A rotating seat (6) is rotatably connected to the outer side of the rotating base shaft (5). A valve disc (7) is fixedly connected to the bottom end of the rotating seat (6). A sealing gasket (12) is fixedly connected to the side of the valve disc (7). The side of the sealing gasket (12) fits against the end face of the valve channel (2). The top of the valve body (1) is fixedly connected to... An air storage box (8) is connected to the side of the air storage box (8), and an arc-shaped tube (9) is fixedly connected to the side of the air storage box (8). The end of the arc-shaped tube (9) is fixedly sleeved to the inner cavity of the clearance box (3). An air bag (10) is provided in the inner cavity of the air storage box (8). The end of the air bag (10) is connected to the other end of the arc-shaped tube (9). An arc-shaped piston rod (11) is fixedly connected to the side of the valve disc (7). The end of the arc-shaped piston rod (11) is movably sleeved to the inner cavity of the arc-shaped tube (9). A support mechanism (14) is provided on the valve channel (2). A slow-closing mechanism (15) is provided on the valve channel (2). The support mechanism (14) includes a telescopic groove (17) opened at one end of the valve channel (2). A spring (18) is fixedly connected to one end of the inner cavity of the telescopic groove (17). A support column (19) is fixedly connected to the end of the spring (18). The side of the support column (19) is in contact with the inner wall of the telescopic groove (17). A telescopic rod (20) is fixedly connected to one end of the support column (19). The end of the telescopic rod (20) is movably sleeved to the outside of the valve channel (2) and fixedly connected to a push plate (21). The slow-closing mechanism (15) includes a receiving groove (23) opened at the end of the valve channel (2) and a fluid push groove (22) set inside the valve channel (2). One end of the inner cavity of the fluid push groove (22) is provided with an inlet hole (24), the end of the inlet hole (24) is connected to the other end of the valve channel (2), and the other end of the inner cavity of the fluid push groove (22) is provided with a vent hole (27), the end of the vent hole (27) is connected to the inner cavity of the receiving groove (23). A piston block (25) is slidably connected to the inner cavity of the fluid push groove (22), and a connecting rod (26) is fixedly connected to the end of the piston block (25). The end of the connecting rod (26) is movably sleeved into the inner cavity of the receiving groove (23) and fixedly connected with a rubber block (28).

2. The micro-resistance valve safety shut-off linkage device according to claim 1, characterized in that: The valve body (1) is fixedly fitted with connecting flanges (16) at both ends, and the gas storage box (8) is hinged with a box door (13) on the outside.

3. The micro-resistance valve safety shut-off linkage device according to claim 1, characterized in that: The inner diameter of the arc-shaped tube (9) is equal to the outer diameter of the arc-shaped piston rod (11).

4. The micro-resistance valve safety shut-off linkage device according to claim 1, characterized in that: The side of the piston block (25) is in contact with the inner wall of the fluid push groove (22).

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