Large-diameter butterfly valve

Abstract

The utility model discloses a large-diameter butterfly valve which comprises a butterfly valve body, fixing pipes are arranged on the two sides of the butterfly valve body, external connecting pipes are arranged on the inner sides of the fixing pipes, control sleeves are arranged on the outer sides of the fixing pipes, circular plates are arranged on the outer sides of the fixing pipes, arc-shaped grooves and circular holes are formed in the circular plates, positioning sleeves are arranged on the outer sides of the fixing pipes in a sleeved mode, and moving rods are arranged on one sides of the positioning sleeves and provided with moving plates. A linkage block is arranged on one side of the circular plate, a connecting block is arranged on the outer side of the fixing pipe, a linkage spring is arranged on the outer side of the fixing pipe, a movable groove is formed in the inner side of the control sleeve, a movable plate is arranged in the movable groove, a positioning frame is arranged on one side of the control sleeve, a positioning rod is arranged in the positioning frame, a positioning spring sleeves the positioning rod, and a positioning plate is arranged at the other end of the positioning rod. An inserting groove is formed in the outer side of the outer connecting pipe, an inserting rod is arranged on one side of the movable plate, a rubber sleeve is arranged in the fixed pipe, a sliding groove is formed in the outer side of the fixed pipe, and positioning grooves are formed in the two ends of the sliding groove. According to the pipeline connector, pipelines can be conveniently connected and disconnected, and meanwhile the stability and the sealing performance of pipeline connection are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and more specifically, to large-diameter butterfly valves. Background Technology

[0002] With the rapid development of the industrial sector, large-diameter butterfly valves, as key components in fluid control systems, directly affect the operational safety and efficiency of the entire pipeline system through their installation and connection efficiency and stability. However, existing large-diameter butterfly valve technology faces many technical challenges in connecting with external pipelines, which severely restricts the efficient operation of industrial production and pipeline systems.

[0003] Firstly, in traditional large-diameter butterfly valve applications, the connection between the butterfly valve and the external pipeline is usually achieved using traditional connection methods such as flange connection, threaded connection, or welding. While these connection methods ensure the sealing and stability of the connection to some extent, they have significant technical drawbacks: the connection operation process is cumbersome and complex, usually requiring the use of various professional tools such as wrenches, torque wrenches, and hydraulic tools, making it difficult to achieve quick and convenient connection and disconnection; moreover, there are many connection points, and the connection process is time-consuming, especially for large-diameter butterfly valves. These problems are particularly prominent in situations requiring frequent pipeline system maintenance, repair, or emergencies, not only reducing work efficiency but also prolonging system downtime, seriously affecting production continuity and emergency response capabilities.

[0004] Secondly, although some improved large-diameter butterfly valves have appeared on the market, superficially achieving convenient connection and disconnection between the butterfly valve and external pipelines through the cooperation of some components, these quick connection structures have significant shortcomings in technical implementation. Typical problems include: the connection mechanism often lacks effective multiple safety and anti-loosening designs. These design defects mean that in practical applications, especially in high-pressure or strongly vibrating environments, the connection structure between the butterfly valve and the external pipeline is easily affected by various dynamic factors such as internal pipeline pressure fluctuations, water hammer effects, and external vibrations, causing the connection to gradually loosen, reduce sealing performance, and in severe cases, even lead to complete connection failure. More dangerously, this loosening or failure often occurs gradually without the operator's knowledge. Once it suddenly disconnects during system operation, it can not only lead to leakage of the working medium and equipment damage, but also potentially cause major safety accidents and economic losses. This lack of connection stability seriously affects the reliability and safety of large-diameter butterfly valves in critical industrial applications, ultimately limiting the operational efficiency and management level of the entire fluid control system. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the problems existing in the prior art, this utility model provides a large-diameter butterfly valve to solve the technical problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a large-diameter butterfly valve, comprising a butterfly valve, with fixed pipes fixedly connected to both sides of the butterfly valve, an outer connecting pipe detachably provided inside the fixed pipe, a control sleeve rotatably mounted on the outer side of the fixed pipe, and a circular plate rotatably mounted on the outer side of the fixed pipe. The circular plate has an arc-shaped groove and a circular hole, with the circular hole located at one end of the arc-shaped groove. A positioning sleeve is slidably fitted on the outer side of the fixed pipe, a moving rod is fixedly connected to one side of the positioning sleeve, and a moving plate is fixedly mounted on the moving rod. The moving plate has two locations, a linkage block is fixedly connected to one side of the circular plate, a connecting block is fixedly mounted on the outer side of the fixed pipe, and a linkage spring is provided on the outer side of the fixed pipe. The two ends of the linkage spring are respectively connected to a connecting block... The control sleeve is connected to the connecting block and the linkage block. The inner side of the control sleeve has a variable diameter movable groove, in which a movable plate is movably installed. A positioning frame is fixedly connected to one side of the control sleeve. A positioning rod is slidably installed in the positioning frame. A positioning spring is movably fitted on the outer side of the positioning rod. A positioning plate is connected to the other end of the positioning rod. The two ends of the positioning spring are connected to the positioning plate and the positioning frame, respectively. A insertion groove is opened on the outer side of the outer tube. A insertion rod is fixedly connected to one side of the movable plate. One end of the insertion rod is inserted into the insertion groove. One side of the inner wall of the insertion groove and one end of the insertion rod are both designed with a chamfer structure. A rubber sleeve is detachably installed on the inner side of the fixed tube. A sliding groove is opened on the outer side of the fixed tube. Positioning grooves are opened at both ends of the sliding groove.

[0009] The present invention is further provided that anti-slip strips are fixedly connected to the outer sides of the control sleeve and the circular plate. This humanized design significantly improves the stability and accuracy of the operator's operation during the connection and disconnection process. In particular, it can effectively prevent fingers from slipping in humid or oily environments, reduce operational errors and safety hazards, and at the same time improve the comfort and efficiency of operation.

[0010] The present invention is further configured such that a movable spring is movably sleeved on the outside of the movable rod, one end of the movable spring is connected to one side of the positioning sleeve, and the other end of the movable spring abuts against one side of the circular plate. This elastic connection design provides an automatic reset function for the entire locking mechanism, so that the positioning sleeve can automatically return to the initial position under the push of the movable spring after the unlocking operation is completed, without the need for manual reset by the operator, which greatly simplifies the operation process and steps.

[0011] The present invention is further configured such that a sliding groove is provided on the outer side of the fixed tube, and a slider is provided in the sliding groove. The slider is fixedly installed on the inner wall of the positioning sleeve. This track-type guide design ensures that the positioning sleeve always slides smoothly along the preset path during the movement, effectively preventing the positioning sleeve from deflecting and jamming, ensuring the smoothness and reliability of locking and unlocking operations. At the same time, the precise cooperation between the slider and the sliding groove also constitutes a second layer of limiting protection for the positioning sleeve.

[0012] The present invention is further configured such that a linkage hole is provided in the connecting block, and a linkage rod is fixedly connected to one side of the linkage block. One end of the linkage rod slides into the linkage hole. This sliding linkage mechanism design allows the linkage rod to perform precise axial sliding and rotational movements in the linkage hole, and ensures the stable use of the linkage spring.

[0013] The present invention is further configured such that multiple rubber rings are fixedly provided on the outer side of the outer pipe, and multiple grooves are provided on the inner side of the fixed pipe. The rubber rings are inserted into the grooves. This multi-seal structure design forms a "multi-line defense" sealing system. The precise fit between each rubber ring and the corresponding groove can independently provide an effective seal, which greatly improves the overall sealing reliability of the system.

[0014] The present invention is further configured such that the connection between the positioning groove and the sliding groove adopts a rounded corner structure design, and one end of the positioning rod adopts a rounded corner structure design. This streamlined transition structure design allows the positioning rod to slide along the smooth rounded corner surface during the process of entering and exiting the positioning groove, which significantly reduces the frictional resistance and impact stress between the positioning rod and the groove wall.

[0015] The present invention is further configured such that the depth of the sliding groove is shallower than the depth of the positioning groove.

[0016] (III) Beneficial Effects

[0017] Compared with the prior art, this utility model provides a large-diameter butterfly valve, which has the following beneficial effects:

[0018] 1. By designing a quick-connect mechanism including components such as a fixed pipe, an external pipe, a control sleeve, a movable groove, a movable plate, a plug rod, and a plug groove, convenient connection and disconnection of the fixed pipe and the external pipe are achieved. This connection system adopts a sophisticated linkage design. During connection, simply insert the external pipe into the fixed pipe and rotate the control sleeve in the opposite direction. The movable groove drives the movable plate to slide inward, allowing the plug rod on the movable plate to insert into the plug groove of the external pipe and lock it in place. During disconnection, rotate the control sleeve in the forward direction. The control sleeve drives the movable groove to rotate in the forward direction, and the movable plate drives the plug rod to slide out of the plug groove, easily separating the external pipe from the fixed pipe. The entire connection and disconnection process does not require any professional tools, making operation simple and quick. This greatly reduces the number of connection points and significantly shortens connection and disconnection time. Especially in situations requiring frequent pipeline system maintenance, repair, or emergencies, it greatly improves work efficiency and system response speed, providing a more convenient and efficient technical solution for the installation and maintenance of large-diameter butterfly valves.

[0019] 2. By designing a multi-layered locking mechanism including components such as a positioning sleeve, moving rod, moving plate, circular plate, arc groove, circular hole, linkage block, linkage spring, positioning frame, positioning rod, positioning spring, positioning plate, slider, and slide groove, high stability is ensured after connection. This overcomes the problems of insufficient connection structure stability in existing technologies, and the ease with which connections can loosen or even fail due to fluctuations in internal pipeline pressure and external forces. This locking system adopts a multi-level linkage safety design. First, the cooperation of the moving plate and circular plate forms the first layer of locking. When the circular plate rotates and resets, the circular hole and moving rod no longer correspond, and the moving plate is limited to one side of the circular plate. Second, the moving rod and moving plate cooperate to support the positioning sleeve to a fixed position, and the slider and slide groove form the second layer of locking for the positioning sleeve. Third, ... The inner wall of the positioning sleeve limits the outer wall of the positioning plate, preventing the positioning plate and positioning rod from moving outward, thus forming the third locking mechanism. Finally, the cooperation between the positioning rod and the positioning groove forms the final lock on the positioning frame and the control sleeve, ensuring that the control sleeve cannot rotate accidentally, forming the fourth safety mechanism. At the same time, the multi-layer sealing structure formed by the rubber ring and the groove, as well as the compression design of the rubber sleeve, ensures high sealing performance at the connection. This carefully designed multi-locking structure effectively prevents the loosening and failure of the connection structure under high pressure or strong vibration conditions. Even under harsh environments of long-term use and vibration, the connection between the butterfly valve and the external pipe remains firm and reliable, fundamentally improving the stability of the connection and the safety of system operation, providing reliable and stable technical support for large-diameter butterfly valves in key industrial applications. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the large-diameter butterfly valve in this utility model;

[0021] Figure 2This is a structural schematic diagram of the inner and outer connecting pipes, control sleeve, positioning sleeve, circular plate and fixing pipe of this utility model;

[0022] Figure 3 This is a cross-sectional structural diagram of the inner and outer connecting pipes, control sleeve, positioning sleeve, circular plate and fixing pipe of this utility model;

[0023] Figure 4 This is a schematic diagram of the dispersed structure of the inner and outer connecting pipes, control sleeve, positioning sleeve, circular plate and fixing pipe in this utility model;

[0024] Figure 5 This is a structural schematic diagram of the control sleeve, positioning sleeve, circular plate, and fixing tube in this utility model.

[0025] In the diagram: 1. Butterfly valve; 2. Fixed pipe; 3. External pipe; 4. Control sleeve; 5. Round plate; 6. Arc groove; 7. Round hole; 8. Positioning sleeve; 9. Moving rod; 10. Moving plate; 11. Linkage block; 12. Connecting block; 13. Linkage spring; 14. Movable groove; 15. Movable plate; 16. Positioning frame; 17. Positioning rod; 18. Positioning spring; 19. Positioning plate; 20. Insertion groove; 21. Insertion rod; 22. Rubber sleeve; 23. Sliding groove; 24. Positioning groove; 25. Anti-slip strip; 26. Moving spring; 27. Sliding groove; 28. Sliding block; 29. ​​Linkage hole; 30. Linkage rod; 31. Rubber ring; 32. Groove. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5A large-diameter butterfly valve includes a butterfly valve 1. Fixed pipes 2 are fixedly connected to both sides of the butterfly valve 1. An outer connecting pipe 3 is detachably installed inside the fixed pipe 2. A control sleeve 4 is rotatably installed on the outside of the fixed pipe 2. A circular plate 5 is rotatably installed on the outside of the fixed pipe 2. The circular plate 5 has an arc-shaped groove 6 and a circular hole 7. The circular hole 7 is located at one end of the arc-shaped groove 6. A positioning sleeve 8 is slidably fitted on the outside of the fixed pipe 2. A moving rod 9 is fixedly connected to one side of the positioning sleeve 8. A moving plate 10 is fixedly installed on the moving rod 9. The moving plate 10 has two locations. A linkage block 11 is fixedly connected to one side of the circular plate 5. A connecting block 12 is fixedly installed on the outside of the fixed pipe 2. A linkage spring 13 is installed on the outside of the fixed pipe 2. The two ends of the linkage spring 13 are connected to the connecting block 12 and the linkage block 11, respectively. The control sleeve 4 has a variable diameter design inside. A movable slot 14 is provided, in which a movable plate 15 is movably mounted. A positioning frame 16 is fixedly connected to one side of the control sleeve 4. A positioning rod 17 is slidably mounted in the positioning frame 16. A positioning spring 18 is movably mounted on the outside of the positioning rod 17. A positioning plate 19 is connected to the other end of the positioning rod 17. The two ends of the positioning spring 18 are connected to the positioning plate 19 and the positioning frame 16, respectively. An insertion slot 20 is provided on the outside of the outer pipe 3. An insertion rod 21 is fixedly connected to one side of the movable plate 15. One end of the insertion rod 21 is inserted into the insertion slot 20. One side of the inner wall of the insertion slot 20 and one end of the insertion rod 21 are both designed with a chamfered structure. A rubber sleeve 22 is detachably installed on the inside of the fixed pipe 2. A sliding slot 23 is provided on the outside of the fixed pipe 2. Positioning slots 24 are provided at both ends of the sliding slot 23.

[0030] In this embodiment, when it is necessary to disconnect the outer pipe 3 from the fixed pipe 2, the circular plate 5 is first rotated forward. The circular plate 5 will drive the circular hole 7 and the arc groove 6 to rotate forward, and the circular plate 5 will drive the linkage block 11 on one side to rotate forward, so that the linkage block 11 drives the linkage rod 30 on one side to rotate forward along the linkage hole 29. The linkage block 11 and the connecting block 12 will cooperate to compress the linkage spring 13. When the linkage spring 13 is compressed to its limit, the circular hole 7 will just rotate to a position concentric with the moving plate 10. Then, the positioning sleeve 8 is pushed, so that the positioning sleeve 8 drives the inner slider 28 to slide along the slide groove 27, and the positioning sleeve 8 will drive the moving rod on one side. 9 and the movable plate 10 slide through the circular hole 7, and the positioning sleeve 8 cooperates with the circular plate 5 to compress the movable spring 26. When the movable spring 26 is compressed to its limit, the movable plate 10 on the side closer to the positioning sleeve 8 just slides through the circular hole 7 and moves to the other side of the circular plate 5. Then the circular plate 5 is released, and the linkage spring 13 pushes the linkage block 11, causing the linkage block 11 to drive one side of the linkage rod 30 to rotate in the opposite direction along the linkage hole 29. Then the linkage block 11 will drive the circular hole 7 and the arc groove 6 to rotate in the opposite direction through the circular plate 5. Then the movable rod 9 will enter the arc groove 6, and the outer wall of the movable rod 9 will be in contact with one end of the inner wall of the arc groove 6. At this time, the movable rod 9 and the side closer to the positioning sleeve 8... A movable plate 10 limits the positioning sleeve 8 to one side of the circular plate 5, so that the inner wall of the positioning sleeve 8 no longer limits the positioning plate 19. Then, the control sleeve 4 is rotated in the forward direction. The control sleeve 4 will drive the positioning frame 16 on one side to rotate in the forward direction. The positioning frame 16 will drive the positioning rod 17, the positioning spring 18, and the positioning plate 19 to rotate in the forward direction. Then, the inner wall of the positioning groove 24 will press one end of the positioning rod 17. Then, one end of the positioning rod 17 will slide out of the positioning groove 24 and enter the sliding groove 23 for sliding. The other end of the positioning rod 17 will drive the positioning spring 18 to stretch outward through the positioning plate 19. At the same time, the control sleeve 4 will drive the inner variable diameter movable groove 14 to move. Rotating forward causes the movable plate 15 to slide outward along the movable groove 14, and the movable plate 15 will drive one side of the plug rod 21 to slide out of the plug groove 20. When the plug rod 21 has completely slid out of the plug groove 20, the movable plate 15 is at the other end inside the movable groove 14. At this time, the positioning frame 16 drives the positioning rod 17 and other components to rotate to the positioning groove 24 connected to the other end of the sliding groove 23. Then the positioning spring 18 resets and pulls the positioning plate 19, causing the positioning plate 19 to drive the positioning rod 17 to slide inward, so that one end of the positioning rod 17 is inserted into the positioning groove 24. Then the outer tube 3 is pulled outward, so that the outer tube 3 can be removed from the fixed tube 2.

[0031] Please see Figures 1-5 As a further implementation of the overall equipment: anti-slip strips 25 are fixedly connected to the outer sides of both the control sleeve 4 and the circular plate 5.

[0032] A movable spring 26 is movably sleeved on the outside of the movable rod 9. One end of the movable spring 26 is connected to one side of the positioning sleeve 8, and the other end of the movable spring 26 abuts against one side of the circular plate 5.

[0033] A groove 27 is provided on the outside of the fixed tube 2, and a slider 28 is provided in the groove 27. The slider 28 is fixedly installed on the inner wall of the positioning sleeve 8.

[0034] A linkage hole 29 is provided in the connecting block 12, and a linkage rod 30 is fixedly connected to one side of the linkage block 11. One end of the linkage rod 30 slides into the linkage hole 29.

[0035] Multiple rubber rings 31 are fixedly provided on the outer side of the outer tube 3, and multiple grooves 32 are provided on the inner side of the fixed tube 2, with the rubber rings 31 inserted into the grooves 32.

[0036] The connection between the positioning groove 24 and the sliding groove 23 is designed with rounded corners, and one end of the positioning rod 17 is also designed with rounded corners.

[0037] The depth of sliding groove 23 is shallower than the depth of positioning groove 24.

[0038] More specifically, when it is necessary to connect the outer pipe 3 to the butterfly valve 1, first insert one end of the outer pipe 3 into the fixed pipe 2, so that the outer pipe 3 abuts against the rubber sleeve 22 set on the inner side of the fixed pipe 2. Then, rotate the control sleeve 4 in the opposite direction. The control sleeve 4 will drive the positioning rod 17, the positioning plate 19 and the positioning spring 18 to rotate in the opposite direction through the positioning bracket 16 on one side. Then, the positioning groove 24 will squeeze one end of the positioning rod 17. Then, one end of the positioning rod 17 will slide out from the positioning groove 24 and enter the sliding groove 23 to slide in the opposite direction. At the same time, the control sleeve 4 will drive the inner variable diameter movable groove 14 to rotate in the opposite direction. The movable plate 15 will slide inward in the movable groove 14, so that the movable plate 15 will drive the plug rod 21 fixedly connected on one side to re-insert into the plug groove. In step 20, due to the chamfered structure design of one end of the insertion rod 21 and one side of the inner wall of the insertion groove 20, the insertion rod 21 will drive the outer tube 3 to slide inward through the insertion groove 20, so that the outer tube 3 presses the rubber sleeve 22 tightly, ensuring the sealing effect at the connection between the outer tube 3 and the fixed tube 2. At the same time, multiple rubber rings 31 set on the outer side of the outer tube 3 will be inserted into the groove 32 simultaneously, forming a multi-layer sealing structure, thereby further ensuring the sealing performance between the outer tube 3 and the fixed tube 2. At this time, the insertion rod 21 is fully inserted into the insertion groove 20, and at this time, the positioning frame 16 drives the positioning rod 17 and other components to rotate in the opposite direction to the position corresponding to the original positioning groove 24. Then, the positioning spring 18 resets and pulls the positioning plate 19, and the positioning plate 19 drives one side of the positioning rod 17 to slide inward. The movement causes one end of the positioning rod 17 to insert into the original positioning groove 24. Then, the circular plate 5 is rotated forward again. The circular plate 5 will drive the circular hole 7 and the arc groove 6 to rotate forward again. The circular plate 5 will also drive the linkage block 11 on one side to rotate forward again. Then, the linkage block 11 will drive the linkage rod 30 to rotate forward along the linkage hole 29. This causes the linkage block 11 and the connecting block 12 to press the linkage spring 13 again. When the circular hole 7 rotates to the position concentric with the moving plate 10, the moving spring 26 pushes the positioning sleeve 8 to slide back to its original position. This causes the positioning sleeve 8 to drive the inner slider 28 to slide back to its original position along the slide groove 27. The positioning sleeve 8 will also drive the moving rod 9 on one side and the two moving plates 10 to slide back to their original positions. After the moving spring 26 is fully reset, the top of the moving rod 9 is set with... The movable plate 10 slides back to its original position on the circular plate 5. Then, the circular plate 5 is released, and the linkage spring 13 resets, pushing the linkage block 11 to rotate and reset. The linkage block 11 then drives the linkage rod 30 on one side to rotate and reset along the linkage hole 29. At the same time, the linkage block 11 drives the circular hole 7 and the arc groove 6 to rotate and reset through the circular plate 5, so that the circular hole 7 and the arc groove 6 rotate and reset to a position that does not correspond to the movable rod 9 and the movable plate 10. Then, the movable rod 9 and the movable plate 10 at its top cooperate to support the positioning sleeve 8 on one side of the circular plate 5. With the help of the slider 28 and the slide groove 27, the positioning sleeve 8 is limited, so that the positioning sleeve 8 will not move. Then, the inner wall of the positioning sleeve 8 limits the outer wall of the positioning plate 19, so that the positioning plate 19 and the positioning rod 17 cannot move outward.Then, the positioning rod 17 and the positioning groove 24 cooperate to limit and lock the positioning frame 16, preventing the positioning frame 16 and the control sleeve 4 from rotating, thereby ensuring the stability of the pipeline connection and ensuring the stable use of the pipeline system.

[0039] In summary, during the use or operation of the overall equipment: when it is necessary to disconnect the outer pipe 3 from the fixed pipe 2, firstly, rotate the circular plate 5 in the forward direction. The circular plate 5 will drive the circular hole 7 and the arc groove 6 to rotate in the forward direction, and the circular plate 5 will drive the linkage block 11 on one side to rotate in the forward direction. This causes the linkage block 11 to drive the linkage rod 30 on one side to rotate in the forward direction along the linkage hole 29. The linkage block 11 will cooperate with the connecting block 12 to compress the linkage spring 13. When the linkage spring 13 is compressed to its limit, the circular hole 7 will rotate to a position concentric with the moving plate 10. Then, push the positioning sleeve 8, causing the positioning sleeve 8 to drive the inner slider 28 to slide along the slide groove 27. The positioning sleeve 8 will... The moving rod 9 and the moving plate 10 slide through the circular hole 7, and the positioning sleeve 8 cooperates with the circular plate 5 to compress the moving spring 26. When the moving spring 26 is compressed to its limit, the moving plate 10 on the side closer to the positioning sleeve 8 just slides through the circular hole 7 and moves to the other side of the circular plate 5. Then the circular plate 5 is released, and the linkage spring 13 pushes the linkage block 11, causing the linkage block 11 to drive the linkage rod 30 on one side to rotate in the opposite direction along the linkage hole 29. Then the linkage block 11 will drive the circular hole 7 and the arc groove 6 to rotate in the opposite direction through the circular plate 5. Then the moving rod 9 will enter the arc groove 6, and the outer wall of the moving rod 9 will be in contact with one end of the inner wall of the arc groove 6. At this time, the moving rod 9 and the side closer to the positioning sleeve 8 will slide through the circular hole 7 and move to the other side of the circular plate 5. A movable plate 10 of the positioning sleeve 8 limits the positioning sleeve 8 to one side of the circular plate 5, so that the inner wall of the positioning sleeve 8 no longer limits the positioning plate 19. Then, the control sleeve 4 is rotated in the forward direction. The control sleeve 4 will drive the positioning frame 16 on one side to rotate in the forward direction. The positioning frame 16 will drive the positioning rod 17, the positioning spring 18, and the positioning plate 19 to rotate in the forward direction. Then, the inner wall of the positioning groove 24 presses against one end of the positioning rod 17. Then, one end of the positioning rod 17 will slide out of the positioning groove 24 and enter the sliding groove 23 for sliding. The other end of the positioning rod 17 will drive the positioning spring 18 to stretch outward through the positioning plate 19. At the same time, the control sleeve 4 will drive the inner variable diameter movable groove 1 to rotate. 4. Rotate forward so that the movable plate 15 slides outward along the movable groove 14, and the movable plate 15 will drive the plug rod 21 on one side to slide out of the plug groove 20. When the plug rod 21 has completely slid out of the plug groove 20, the movable plate 15 is at the other end inside the movable groove 14. At this time, the positioning frame 16 drives the positioning rod 17 and other components to rotate to the positioning groove 24 connected to the other end of the sliding groove 23. Then the positioning spring 18 resets and pulls the positioning plate 19, so that the positioning plate 19 drives the positioning rod 17 to slide inward, so that one end of the positioning rod 17 is inserted into the positioning groove 24. Then the outer pipe 3 is pulled outward, so that the outer pipe 3 can be removed from the fixed pipe 2.

[0040] When connecting the outer pipe 3 to the butterfly valve 1, first insert one end of the outer pipe 3 into the fixed pipe 2, so that the outer pipe 3 abuts against the rubber sleeve 22 set on the inner side of the fixed pipe 2. Then, rotate the control sleeve 4 in the opposite direction. The control sleeve 4 will drive the positioning rod 17, the positioning plate 19 and the positioning spring 18 to rotate in the opposite direction through the positioning bracket 16 on one side. Then, the positioning groove 24 will squeeze one end of the positioning rod 17. Then, one end of the positioning rod 17 will slide out of the positioning groove 24 and enter the sliding groove 23 for reverse sliding. At the same time, the control sleeve 4 will drive the inner variable diameter movable groove 14 to rotate in the opposite direction. The movable plate 15 will slide inward in the movable groove 14, so that the movable plate 15 will drive the plug rod 21 fixedly connected on one side to re-insert into the plug groove 20. Due to the chamfered design of one end of the insertion rod 21 and one side of the inner wall of the insertion groove 20, the insertion rod 21 will drive the outer tube 3 to slide inward through the insertion groove 20, so that the outer tube 3 presses the rubber sleeve 22 tightly, ensuring the sealing effect at the connection between the outer tube 3 and the fixed tube 2. At the same time, multiple rubber rings 31 set on the outer side of the outer tube 3 will be inserted into the groove 32 simultaneously, forming a multi-layer sealing structure, thereby further ensuring the sealing performance between the outer tube 3 and the fixed tube 2. At this time, the insertion rod 21 is fully inserted into the insertion groove 20, and at this time, the positioning frame 16 drives the positioning rod 17 and other components to rotate in the opposite direction to the position corresponding to the original positioning groove 24. Then, the positioning spring 18 resets and pulls the positioning plate 19. The positioning plate 19 drives one side of the positioning rod 17 to slide inward, so that... One end of the positioning rod 17 is inserted into the original positioning groove 24. Then, the circular plate 5 is rotated forward again. The circular plate 5 will drive the circular hole 7 and the arc groove 6 to rotate forward again. The circular plate 5 will also drive the linkage block 11 on one side to rotate forward again. Then, the linkage block 11 will drive the linkage rod 30 to rotate forward along the linkage hole 29. This will cause the linkage block 11 and the connecting block 12 to press the linkage spring 13 again. When the circular hole 7 rotates to the position concentric with the moving plate 10, the moving spring 26 pushes the positioning sleeve 8 to slide back to its original position. This will cause the positioning sleeve 8 to drive the inner slider 28 to slide back to its original position along the slide groove 27. The positioning sleeve 8 will also drive the moving rod 9 on one side and the two moving plates 10 to slide back to their original positions. After the moving spring 26 has fully reset, the top of the moving rod 9 is set with... The movable plate 10 slides back to its original position on the circular plate 5. Then, the circular plate 5 is released, and the linkage spring 13 resets, pushing the linkage block 11 to rotate and reset. The linkage block 11 then drives the linkage rod 30 on one side to rotate and reset along the linkage hole 29. At the same time, the linkage block 11 drives the circular hole 7 and the arc groove 6 to rotate and reset through the circular plate 5, so that the circular hole 7 and the arc groove 6 rotate and reset to a position that does not correspond to the movable rod 9 and the movable plate 10. Then, the movable rod 9 and the movable plate 10 at its top cooperate to support the positioning sleeve 8 on one side of the circular plate 5. With the help of the slider 28 and the slide groove 27, the positioning sleeve 8 is limited, so that the positioning sleeve 8 will not move. Then, the inner wall of the positioning sleeve 8 limits the outer wall of the positioning plate 19, so that the positioning plate 19 and the positioning rod 17 cannot move outward.Then, the positioning rod 17 and the positioning groove 24 cooperate to limit and lock the positioning frame 16, preventing the positioning frame 16 and the control sleeve 4 from rotating, thereby ensuring the stability of the pipeline connection and ensuring the stable use of the pipeline system.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A large-diameter butterfly valve, including a butterfly valve (1), characterized in that: The butterfly valve (1) has fixed pipes (2) on both sides. The inner side of the fixed pipe (2) has an outer pipe (3). The outer side of the fixed pipe (2) has a control sleeve (4) that rotates. The outer side of the fixed pipe (2) has a circular plate (5) that rotates. The circular plate (5) has an arc groove (6) and a circular hole (7). The circular hole (7) is located at one end of the arc groove (6). The outer side of the fixed pipe (2) is fitted with a positioning sleeve (8). The positioning sleeve (8) has a moving rod (9) on one side. The moving rod (9) has a moving plate (10). The circular plate (5) has a linkage block (11) on one side. The outer side of the fixed pipe (2) has a connecting block (12). The outer side of the fixed pipe (2) has a linkage spring (13). The inner side of the control sleeve (4) has a variable diameter opening. The movable slot (14) is provided with a movable plate (15). The control sleeve (4) is provided with a positioning frame (16) on one side. The positioning frame (16) is provided with a positioning rod (17). The positioning rod (17) is fitted with a positioning spring (18) on the outside. The other end of the positioning rod (17) is provided with a positioning plate (19). The outer pipe (3) is provided with a plug groove (20). The movable plate (15) is provided with a plug rod (21) on one side. The inner wall of the plug groove (20) and the plug rod (21) are both designed with a chamfered structure. The inner side of the fixed pipe (2) is provided with a rubber sleeve (22). The outer side of the fixed pipe (2) is provided with a sliding groove (23). The two ends of the sliding groove (23) are provided with positioning grooves (24).

2. The large-diameter butterfly valve according to claim 1, characterized in that: The control sleeve (4) and the outer side of the circular plate (5) are both fixedly connected with anti-slip strips (25).

3. The large-diameter butterfly valve according to claim 1, characterized in that: A movable spring (26) is movably sleeved on the outside of the movable rod (9). One end of the movable spring (26) is connected to one side of the positioning sleeve (8), and the other end of the movable spring (26) abuts against one side of the circular plate (5).

4. The large-diameter butterfly valve according to claim 3, characterized in that: The fixed tube (2) has a groove (27) on its outer side, and a slider (28) is provided in the groove (27). The slider (28) is fixedly installed on the inner wall of the positioning sleeve (8).

5. The large-diameter butterfly valve according to claim 4, characterized in that: The connecting block (12) has a linkage hole (29), and a linkage rod (30) is fixedly connected to one side of the linkage block (11). One end of the linkage rod (30) slides into the linkage hole (29).

6. The large-diameter butterfly valve according to any one of claims 1-5, characterized in that: Multiple rubber rings (31) are fixedly provided on the outer side of the outer tube (3), and multiple grooves (32) are provided on the inner side of the fixed tube (2), with the rubber rings (31) inserted into the grooves (32).

7. The large-diameter butterfly valve according to claim 5, characterized in that: The connection between the positioning groove (24) and the sliding groove (23) is designed with rounded corners, and one end of the positioning rod (17) is designed with rounded corners.

8. The large-diameter butterfly valve according to claim 7, characterized in that: The depth of the sliding groove (23) is shallower than the depth of the positioning groove (24).

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