Switch type pneumatic butterfly valve

Abstract

The utility model relates to the technical field of pneumatic butterfly valves, and discloses a switch type pneumatic butterfly valve which comprises a pipeline, a plurality of fixing blocks are fixedly connected to the left end and the right end of the inner wall of the pipeline, a plurality of connecting blocks are fixedly connected to the inner walls of the left end and the right end of the pipeline, and sliding rods are slidably connected to the inner walls of the fixing blocks. Sliding rods are slidably connected to the inner walls of the connecting blocks, strong springs are arranged outside the sliding rods and the sliding rods in a sleeving mode, circular plates are fixedly connected to the far sides of the multiple sliding rods and the far sides of the multiple sliding rods, two convex plates are fixedly connected to the close sides of the multiple sliding rods, and the two convex plates are fixedly connected to the two ends of each convex plate. Two concave rings are fixedly connected to the close sides of the multiple sliding rods. According to the utility model, the convex plates and the concave rings can be automatically pushed to act through the circular plate, so that the two convex plates and the two concave rings are respectively closed, the backflow prevention condition is avoided, and the use safety is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic butterfly valves, in particular to a switching pneumatic butterfly valve. Background Technique

[0002] The switching pneumatic butterfly valve is mainly used in a pipeline system to quickly open and close a fluid passage. In industrial production, it is used to control the flow of various liquid and gas media. In a chemical plant, it is used to control the conveying paths of chemical raw materials and finished products, and determine whether materials enter a reaction kettle or a storage tank.

[0003] In the prior art, when most switching pneumatic butterfly valves are in use, if the downstream equipment suddenly stops operating or the pipeline is blocked, the pressure will be transmitted in the reverse direction. This will disrupt the mixing sequence of the materials undergoing the reaction, and some incompletely reacted materials will flow back to the upstream raw material storage area and mix with the newly added raw materials, resulting in out-of-control chemical reactions, which not only affect the product quality but also may cause safety accidents. Therefore, in view of the above deficiencies, a switching pneumatic butterfly valve is proposed to solve the above problems. Content of the Utility Model

[0004] In order to make up for the above deficiencies, the utility model provides a switching pneumatic butterfly valve, aiming to improve the situation that in the prior art, when some switching pneumatic butterfly valves are in use, due to the downstream stop or blockage, the materials will flow back, resulting in safety accidents.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A switching pneumatic butterfly valve, including a pipeline. Both the left and right ends of the inner wall of the pipeline are fixedly connected with a plurality of fixing blocks. Both the left and right ends of the inner wall of the pipeline are fixedly connected with a plurality of connecting blocks. A sliding rod is slidably connected to the inner wall of the fixing block, and a sliding rod is slidably connected to the inner wall of the connecting block. A strong spring is sleeved outside both the sliding rod and the sliding rod. The far sides of the plurality of sliding rods are fixedly connected with circular plates, and the near sides of the plurality of sliding rods are fixedly connected with two convex plates. The near sides of the plurality of sliding rods are fixedly connected with two concave rings. A rotating component for transmitting power is rotatably connected to the inside of the pipeline, and a switch plate is fixedly connected to the bottom end of the rotating component;

[0007] As a further description of the above technical solution:

[0008] A disc is fixedly connected to the top side of the rotating assembly. Two opening blocks are fixedly connected to the outer side wall of the disc. A rotating plate is rotatably connected inside the opening block. Connecting plates are rotatably connected to the far ends of the two rotating plates. Concave blocks are rotatably connected to the far ends of the two connecting plates. Sliding plates are fixedly connected to the far sides of the two concave blocks. A plurality of first springs are fixedly connected to the far sides of the two sliding plates. Two support plates are fixedly connected to the top side of the pipeline. A pneumatic chamber is fixedly connected to the top sides of the two support plates. An air inlet frame is fixedly connected to the top end of the pneumatic chamber. An air inlet column is threadedly connected to the inner wall of the air inlet frame. An air inlet pipe is fixedly connected to the top end of the air inlet column. A plurality of second springs are fixedly connected to the bottom side of the inner wall of the air inlet frame. A sliding ring is fixedly connected to the top sides of the plurality of second springs;

[0009] As a further description of the above technical solution:

[0010] The rotating assembly includes a rotating rod, the outside of the rotating rod is rotatably connected inside the pipeline, and a limiting ring is fixedly connected to the top end of the rotating rod;

[0011] As a further description of the above technical solution:

[0012] The bottom end of the rotating rod is fixedly connected inside the switch board, and the top side of the rotating rod is fixedly connected to the bottom side of the disc;

[0013] As a further description of the above technical solution:

[0014] The top end of the rotating rod is rotatably connected inside the pneumatic chamber, and the outside of the limiting ring is rotatably connected to the inner wall of the bottom end of the pneumatic chamber;

[0015] As a further description of the above technical solution:

[0016] The outer parts of the two sliding plates are respectively slidably connected to the left and right inner walls of the pneumatic chamber, and the far ends of the plurality of first springs are respectively fixedly connected to the left and right sides of the inner wall of the pneumatic chamber;

[0017] As a further description of the above technical solution:

[0018] The inner wall of the concave ring is slidably connected to the outside of the convex plate, and the outer parts of the two convex plates and the two concave rings are respectively slidably connected to the left and right inner walls of the pipeline;

[0019] As a further description of the above technical solution:

[0020] The outside of the sliding ring is slidably connected to the inner wall of the air inlet frame. The top side of the sliding ring is in contact with the bottom side of the air inlet column. An annular opening is provided inside the air inlet frame.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by applying a force in the opposite direction to the convex plate and the concave ring, if the pressure in the downstream of the pipeline is higher than that in the upstream, resulting in backflow, the pressure of the backflow material will cause the circular plate to automatically push the convex plate and the concave ring to act, so that the two convex plates are respectively closed with the two concave rings, thus avoiding the occurrence of backflow prevention, and then improving the safety during use.

[0023] 2. In the utility model, by sliding the sliding ring and squeezing a plurality of second springs, the second springs can store elastic potential energy, and then apply a force in the opposite direction to the sliding ring to fit with the air inlet column. At this time, gas can be blown into the pneumatic chamber through the air inlet pipe, thus avoiding the phenomenon of air leakage and improving the sealing performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of a switch-type pneumatic butterfly valve proposed by the utility model;

[0025] Figure 2 is a schematic structural diagram of a limit ring of a switch-type pneumatic butterfly valve proposed by the utility model;

[0026] Figure 3 is Figure 2 an enlarged view at A in

[0027] Figure 4 is a schematic structural diagram of a concave ring of a switch-type pneumatic butterfly valve proposed by the utility model;

[0028] Figure 5 is Figure 2 an enlarged view at B in

[0029] Figure 6 is a schematic structural diagram of a sliding ring of a switch-type pneumatic butterfly valve proposed by the utility model.

[0030] Legend Explanation:

[0031] 1. Pipeline; 2. Fixed block; 3. Connecting block; 4. Sliding ring; 5. Sliding rod; 6. Sliding bar; 7. Strong spring; 8. Circular plate; 9. Convex plate; 10. Concave ring; 11. Support plate; 12. Pneumatic chamber; 13. Rotating rod; 14. Switch plate; 15. Limit ring; 16. Disc; 17. Opening block; 18. Rotating plate; 19. Connecting plate; 20. Second spring; 21. Concave block; 22. Sliding plate; 23. First spring; 24. Air inlet frame; 25. Air inlet column; 26. Air inlet pipe; 27. Annular opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] Referring to Figures 2 to 4 , an embodiment provided by the present utility model: a switching pneumatic butterfly valve, including a pipeline 1 for transporting materials. A plurality of fixing blocks 2 are fixedly connected to both the left and right ends of the inner wall of the pipeline 1, and a plurality of connecting blocks 3 are fixedly connected to both the left and right ends of the inner wall of the pipeline 1. Different subsequent components are supported by the fixing blocks 2 and the connecting blocks 3 respectively. A sliding rod 5 is slidably connected to the inner wall of the fixing block 2. Due to the limitation of the fixing block 2, the sliding rod 5 can slide stably. A sliding rod 6 is slidably connected to the inner wall of the connecting block 3. Due to the limitation of the connecting block 3, the sliding rod 6 can slide stably. A strong spring 7 is sleeved outside both the sliding rod 5 and the sliding rod 6. Due to the limitation of the strong spring 7, the strong spring 7 can be evenly stressed;

[0034] Circular plates 8 are fixedly connected to the far sides of a plurality of sliding rods 5 and the far sides of a plurality of sliding rods 6, which are used to limit the sliding rods 5 and the sliding rods 6 to prevent the sliding rods 5 and the sliding rods 6 from slipping. Two convex plates 9 are fixedly connected to the adjacent sides of a plurality of sliding rods 5, providing a supporting force for the convex plates 9 so that the convex plates 9 can slide after being impacted. Two concave rings 10 are fixedly connected to the adjacent sides of a plurality of sliding rods 6, providing support for the concave rings 10 so that the concave rings 10 can slide stably after being impacted by a force. The inner wall of the concave ring 10 is slidably connected to the outside of the convex plate 9, and the anti-backflow effect is completed by the closing of the convex plate 9 and the concave ring 10. The outer parts of the two convex plates 9 and the two concave rings 10 are respectively slidably connected to the left and right ends of the inner wall of the pipeline 1. Due to the limitation of the pipeline 1, the convex plates 9 and the concave rings 10 can slide stably left and right.

[0035] Referring to Figure 1 , Figure 2 and Figure 5, a rotating component for transmitting power is rotatably connected inside the pipeline 1. A switch plate 14 is fixedly connected to the bottom end of the rotating component for controlling the transportation of materials. The rotating component includes a rotating rod 13. The top end of the rotating rod 13 is rotatably connected inside the pneumatic chamber 12. Due to the restriction of the pneumatic chamber 12, the rotating rod 13 can rotate stably. The bottom end of the rotating rod 13 is fixedly connected inside the switch plate 14. The switch plate 14 is rotated by driving the rotating rod 13 to complete opening and closing. The outside of the rotating rod 13 is rotatably connected inside the pipeline 1. A limiting ring 15 is fixedly connected to the top end of the rotating rod 13. The outside of the limiting ring 15 is rotatably connected to the inner wall of the bottom end of the pneumatic chamber 12. Due to the restriction of the pneumatic chamber 12, the limiting ring 15 is prevented from slipping, thereby restricting the rotating rod 13. A disc 16 is fixedly connected to the top side of the rotating component. The top side of the rotating rod 13 is fixedly connected to the bottom side of the disc 16. The rotating force is transmitted to the rotating rod 13 through the disc 16;

[0036] Two opening blocks 17 are fixedly connected to the outer side wall of the disc 16 to provide a supporting force for the opening blocks 17. A rotating plate 18 is rotatably connected inside the opening blocks 17. The opening blocks 17 are rotated around the rotating rod 13 by the rotating plate 18 after being stressed. Connecting plates 19 are rotatably connected to the far ends of the two rotating plates 18. The rotating force is transmitted to the rotating plates 18 through the connecting plates 19 after being stressed. Concave blocks 21 are rotatably connected to the far ends of the two connecting plates 19. The force is transmitted to the connecting plates 19 through the concave blocks 21 after being stressed. Sliding plates 22 are fixedly connected to the far sides of the two concave blocks 21. The sliding plates 22 slide after being subjected to the force of gas compression. The outsides of the two sliding plates 22 are respectively slidably connected to the left and right inner walls of the pneumatic chamber 12. After the gas is introduced into the inside of the pneumatic chamber 12, the two sliding plates 22 are pushed to slide away from each other. A plurality of first springs 23 are fixedly connected to the far sides of the two sliding plates 22 to provide a restoring force for the sliding plates 22 after losing the force of gas compression. The far ends of the plurality of first springs 23 are respectively fixedly connected to the left and right sides of the inner wall of the pneumatic chamber 12 to fix the first springs 23 so that the first springs 23 can be evenly stressed.

[0037] Refer to Figure 1 and Figure 6, two support plates 11 are fixedly connected to the top side of the pipeline 1 to provide support force for the support plates 11. The top sides of the two support plates 11 are fixedly connected with a pneumatic chamber 12 to provide support force for the pneumatic chamber 12, so that the pneumatic chamber 12 can be stably supported. The top end of the pneumatic chamber 12 is fixedly connected with an air inlet frame 24 for introducing gas into the interior of the pneumatic chamber 12. The outer part of the sliding ring 4 is slidably connected to the inner wall of the air inlet frame 24. Due to the restriction of the air inlet frame 24, the air inlet frame 24 can slide vertically. The inner wall of the air inlet frame 24 is threadedly connected with an air inlet column 25 for installing the air inlet column 25. The top side of the sliding ring 4 is in contact with the bottom side of the air inlet column 25. An annular opening 27 is formed in the interior of the air inlet frame 24. The top end of the air inlet column 25 is fixedly connected with an air inlet pipe 26 for sealing treatment. A plurality of second springs 20 are fixedly connected to the bottom side of the inner wall of the air inlet frame 24, and the top sides of the plurality of second springs 20 are fixedly connected with the sliding ring 4 to fix both ends of the second springs 20, so that the second springs 20 can be evenly stressed.

[0038] Working principle: First, hold the air inlet column 25 and rotate it threadedly into the interior of the air inlet frame 24. As the air inlet column 25 rotates, it slowly moves downward. As the air inlet column 25 moves, it will press against the sliding ring 4, causing the sliding ring 4 to slide and compress a plurality of second springs 20, so that the second springs 20 can store elastic potential energy, and then give the sliding ring 4 a reaction force to fit with the air inlet column 25. At this time, gas can be blown into the interior of the pneumatic chamber 12 through the air inlet pipe 26, thereby avoiding air leakage and improving the sealing performance of the device; as the gas enters, the two sliding plates 22 slide away from each other and respectively compress a plurality of first springs 23, so that the first springs 23 can store elastic potential energy, and then give the sliding plates 22 a reaction force to reset. And as the sliding plates 22 slide, they will drive the concave blocks 21 to slide, and then drive the connecting plate 19 to rotate, thereby driving the connecting plate 19 to rotate and pull the rotating plate 18, thereby driving the opening block 17 to drive the disc 16 and rotate around the center of the disc 16, thereby driving the rotating rod 13 to rotate, and then driving the switch plate 14 to rotate. At this time, the material can flow through the interior of the pipeline 1;

[0039] During the normal material transportation process, if there is a situation of backflow caused by the pressure downstream of pipeline 1 being higher than that upstream, whether it is forward transportation or reverse transportation, the left concave ring 10 and the right convex plate 9 will be pushed to slide to the right when transporting from left to right. Conversely, it is the left convex plate 9 and the right concave ring 10. As the convex plate 9 and the concave ring 10 slide, the convex plate 9 will push the sliding rod 5 to slide, and the concave ring 10 will push the sliding rod 6 to slide. Then, during the sliding process, the convex plate 9 and the concave ring 10 will no longer contact the concave ring 10 and the convex plate 9 respectively. At this time, the material will flow smoothly. At the same time, the convex plate 9 and the concave ring 10 will respectively compress multiple strong springs 7, enabling the strong springs 7 to store elastic potential energy, and then giving the convex plate 9 and the concave ring 10 a force in the opposite direction. If there is a situation of backflow caused by the pressure downstream of pipeline 1 being higher than that upstream, for the pressure of the backflow material, the circular plate 8 will automatically push the convex plate 9 and the concave ring 10 to act, causing the two convex plates 9 to be respectively closed with the two concave rings 10, thus avoiding the situation of backflow prevention and then improving the safety during use.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A switch-type pneumatic butterfly valve, comprising a pipeline (1), characterized in that: On both the left and right ends of the inner wall of the pipeline (1), a plurality of fixing blocks (2) are fixedly connected. On both the left and right ends of the inner wall of the pipeline (1), a plurality of connecting blocks (3) are fixedly connected. A sliding rod (5) is slidably connected to the inner wall of the fixing block (2), and a sliding rod (6) is slidably connected to the inner wall of the connecting block (3). A powerful spring (7) is sleeved on the outer parts of both the sliding rod (5) and the sliding rod (6). On the far sides of the plurality of sliding rods (5), circular plates (8) are fixedly connected to the far sides of the plurality of sliding rods (6). On the near sides of the plurality of sliding rods (5), two convex plates (9) are fixedly connected. On the near sides of the plurality of sliding rods (6), two concave rings (10) are fixedly connected. A rotating component for transmitting power is rotatably connected inside the pipeline (1), and a switch plate (14) is fixedly connected to the bottom end of the rotating component.

2. The on-off pneumatic butterfly valve according to claim 1, characterized in that: On the top side of the rotating component, a disc (16) is fixedly connected. On the outer side wall of the disc (16), two opening blocks (17) are fixedly connected. A rotating plate (18) is rotatably connected inside the opening block (17). On the far ends of the two rotating plates (18), connecting plates (19) are rotatably connected. On the far ends of the two connecting plates (19), concave blocks (21) are rotatably connected. On the far sides of the two concave blocks (21), sliding plates (22) are fixedly connected. On the far sides of the two sliding plates (22), a plurality of springs one (23) are fixedly connected. On the top side of the pipeline (1), two support plates (11) are fixedly connected. On the top sides of the two support plates (11), a pneumatic chamber (12) is fixedly connected. On the top end of the pneumatic chamber (12), an air intake frame (24) is fixedly connected. An air intake column (25) is threadedly connected to the inner wall of the air intake frame (24). On the top end of the air intake column (25), an air intake pipe (26) is fixedly connected. On the bottom side of the inner wall of the air intake frame (24), a plurality of springs two (20) are fixedly connected. On the top sides of the plurality of springs two (20), a sliding ring (4) is fixedly connected.

3. The on-off pneumatic butterfly valve according to claim 2, characterized in that: The rotating component includes a rotating rod (13), and the outer part of the rotating rod (13) is rotatably connected inside the pipeline (1), and a limiting ring (15) is fixedly connected to the top end of the rotating rod (13).

4. The switch-type pneumatic butterfly valve according to claim 3, characterized in that: The bottom end of the rotating rod (13) is fixedly connected to the inside of the switch plate (14), and the top side of the rotating rod (13) is fixedly connected to the bottom side of the disc (16).

5. The on-off pneumatic butterfly valve according to claim 4, characterized in that: The top end of the rotating rod (13) is rotatably connected inside the pneumatic chamber (12), and the outer part of the limiting ring (15) is rotatably connected to the inner wall of the bottom end of the pneumatic chamber (12).

6. The switch-type pneumatic butterfly valve according to claim 2, characterized in that: The outer parts of the two sliding plates (22) are respectively slidably connected to the inner walls of the left and right ends of the pneumatic chamber (12), and the far ends of the plurality of springs one (23) are respectively fixedly connected to the left and right sides of the inner wall of the pneumatic chamber (12).

7. The on-off pneumatic butterfly valve according to claim 1, characterized in that: The inner wall of the concave ring (10) is slidably connected to the outside of the convex plate (9), and the two convex plates (9) and the outsides of the two concave rings (10) are respectively slidably connected to the inner walls of the left and right ends of the pipe (1).

8. The switch-type pneumatic butterfly valve according to claim 2, characterized in that: The outside of the sliding ring (4) is slidably connected to the inner wall of the air inlet frame (24). The top side of the sliding ring (4) is in contact with the bottom side of the air inlet column (25). An annular opening (27) is formed inside the air inlet frame (24).

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