Butterfly valve with locking structure

Abstract

The invention relates to the technical field of butterfly valves, in particular to a butterfly valve with a locking structure, which comprises a valve body, a butterfly plate, a valve shaft and a rotating rod. According to the scheme, the pushing cylinder is arranged, the end, pushing the pushing cylinder to rotate, of the pushing cylinder is attached to the outer side wall of the control device, when the butterfly valve needs to be controlled, a rotating cylinder can move by rotating the pushing cylinder, and therefore a first gear is driven to move to the position where the first gear is meshed with a second gear; by arranging a plurality of limiting shafts and a limiting groove formed in the valve body, the stability when the valve body is closed can be improved, when a rotating cylinder moves in the process that the valve body needs to be controlled, a locking gear is driven to rotate through a locking rack, and then the rotating rod is controlled to control opening and closing of the butterfly valve. And then, the lifting plate moves downwards, so that the multiple limiting shafts are driven to retract into the inserting cavity, and follow-up rotation of the butterfly plate is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a butterfly valve with a locking structure. Background Art

[0002] A butterfly valve is a valve used to control the flow of fluid in a pipeline. Its main features are simple structure, small size, light weight, easy operation and rapid opening and closing. It opens or closes by rotating a disc, which is mounted on a shaft perpendicular to the pipeline axis. When the disc is parallel to the pipeline, the valve is in a fully open state; when the disc is perpendicular to the pipeline, the valve is in a fully closed state.

[0003] Conventional butterfly valves are usually opened or closed by turning the handle directly, and operator errors may lead to serious consequences. For example, in the petrochemical industry, an incorrect operation may cause an explosion, fire or leakage of toxic substances.

[0004] Therefore, it is necessary to design a butterfly valve with a fool-proof effect. For this purpose, a butterfly valve with a locking structure is proposed. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a butterfly valve with a locking structure to solve the problems raised in the above background technology.

[0006] A butterfly valve with a locking structure comprises a valve body, a butterfly plate, a valve shaft and a rotating rod, wherein the butterfly plate controls the opening and closing of the valve body by rotating the valve shaft; The valve shaft in the valve body is controlled to rotate by a control device. The rotating rod is arranged in the control device. A transmission mechanism is arranged in the control device. The transmission mechanism includes a first gear for driving arranged on the outside of the rotating rod. The valve shaft rotates through the meshing action of the first gear. A locking mechanism is also arranged in the control device. The locking mechanism is used to release the meshing action of the first gear on the valve shaft when the valve body is closed.

[0007] Preferably, the locking mechanism comprises a locking shaft arranged at the center of the valve shaft, the locking shaft is slidably connected to the valve shaft, a locking chamber is arranged in the butterfly plate, and an insertion cavity is arranged at the edge, a limiting shaft is inserted and connected in the insertion cavity, and a plurality of limiting grooves corresponding to the limiting shaft are arranged in the valve body; The inner wall of the locking chamber is connected to a push block through a reset spring, and the push block is connected to the limit shaft through a connecting rod. When the first gear disengages from the valve shaft, the locking shaft will move downward, and the side of the push block opposite to the locking shaft is arranged in an inclined manner.

[0008] Preferably, the locking mechanism further comprises a locking gear rotatably connected to the control device, a locking disc is fixedly connected to a surface of the locking gear opposite to the locking shaft, and a fixed shaft is fixedly connected to the locking disc; A lifting plate is slidably connected in the control device, and a sliding frame is fixedly connected to the lifting plate. The fixed shaft is slidably connected to the inner wall of the sliding frame. The lifting plate moves up or down under the rotation of the locking disk. The end of the lifting plate away from the locking disk is directly above the locking shaft. When the lifting plate moves downward, it can drive the locking shaft to move downward.

[0009] Preferably, a rotating cylinder is slidably connected to the outer side of the rotating rod in the control device, the sliding direction of the rotating cylinder is consistent with the setting direction of the rotating rod, and a locking rack is connected to the rotating cylinder, and the locking rack and the locking gear are meshed with each other; The inner side wall of the control device is slidably connected with a push rod, and the control device is rotatably connected with a push cylinder, an arc-shaped push groove is provided on the push cylinder, and the inner side wall of the push groove is slidably connected with a push shaft, and the push shaft is slidably connected to the push rod, and the positive rotation of the push cylinder can drive the push rod to slide along the setting direction of the rotating rod through the push groove; The pushing rod is connected to the rotating cylinder, and the two can rotate relatively.

[0010] Preferably, the end of the pushing cylinder outside the control device is connected to a limit plate, the limit plate is fixedly connected to a limit block, and a torsion spring for resetting the pushing cylinder is connected to the outer wall of the pushing cylinder and the control device; A fixed block is connected to the outer wall of the control device through a telescopic rod. The fixed block is used to limit the rotation of the limit block. In the positive rotation direction of the push cylinder, the side opposite to the limit block and the fixed block is arranged in an inclined manner.

[0011] Preferably, the first gear is fixedly connected to the outer side wall of the rotating cylinder, and the first gear can move in the setting direction of the rotating rod as the rotating cylinder moves; Two symmetrically arranged mounting shafts are rotatably connected on one side of the rotating rod setting direction, a second gear is fixedly connected to the mounting shaft close to the rotating rod, a same transmission chain is arranged between the two mounting shafts, and a plurality of pushing teeth are arranged on one side of the transmission chain close to the valve shaft; An opening and closing gear is fixedly connected to the outer wall at the top of the valve shaft. The opening and closing gear is located on the side of the transmission chain parallel to the bottom position in the control device. When the transmission chain is transmitting, the opening and closing gear can be driven to rotate by pushing the teeth. The rotation of the opening and closing gear is used to drive the rotation of the valve shaft.

[0012] Preferably, a first seal and a second seal are provided between the control device and the valve body, and the first seal and the second seal are connected by a plurality of bolts.

[0013] Preferably, a rotating handle is fixedly connected to one end of the rotating rod outside the control device.

[0014] Preferably, the rotating rod is located in the pushing cylinder, the rotating rod and the pushing cylinder are rotationally connected, and the pushing cylinder and the rotating rod can rotate independently of each other.

[0015] The beneficial effects of the present invention are: 1. This scheme uses a pushing cylinder to push one end of the pushing cylinder to stick to the outer wall of the control device. When the butterfly valve needs to be controlled, the rotating cylinder can be moved by rotating the pushing cylinder, thereby driving the first gear to move to a position where it meshes with the second gear, and then the rotating rod can be controlled to open and close the butterfly valve.

[0016] 2. By setting up multiple limit shafts and limit grooves in the valve body, the stability of the valve body when it is closed can be increased. When the valve body needs to be controlled, when the rotating cylinder moves, the locking gear will be driven to rotate through the locking rack, and then the lifting plate will move down, thereby driving the multiple limit shafts to retract into the insertion cavity, facilitating the subsequent rotation of the butterfly plate. Through multiple steps, the operator can be prevented from operating the valve incorrectly.

[0017] 3. When the first gear moves to a position where it meshes with the second gear, the transmission chain is caused to transmit during the process of driving the first gear to rotate. The valve shaft is caused to rotate through the multiple push teeth, thereby driving the butterfly plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional view of the control device and the butterfly plate in the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 It is a schematic diagram of the positions of the locking shaft and the pushing block in the present invention; Figure 5 It is a rear view of the butterfly plate in the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 It is a structural schematic diagram of the pushing cylinder and the pushing groove of the present invention; Figure 8 It is a structural schematic diagram of the sliding frame and the lifting plate of the present invention; Fig. 9 It is a schematic diagram of the position of the limiting groove in the present invention.

[0019] In the figure: The invention discloses a valve body; 2. a butterfly plate; 3. a first sealing member; 4. a second sealing member; 5. a control device; 6. a valve shaft; 7. a locking chamber; 8. an inserting chamber; 9. a limiting shaft; 10. a connecting rod; 11. a pushing block; 12. a locking shaft; 13. a rotating handle; 14. a pushing cylinder; 15. a limiting disk; 16. a limiting block; 17. a fixing block; 18. a torsion spring; 19. a rotating rod; 20. a pushing groove; 21. a pushing rod; 22. a rotating cylinder; 23. a locking gear; 24. a locking rack; 25. a locking disc; 26. a sliding frame; 27. a lifting plate; 28. a first gear; 29. ​​a mounting shaft; 30. a second gear; 31. a transmission chain; 32. an opening and closing gear; 33. a limiting groove. DETAILED DESCRIPTION

[0020] The following will refer to the attached Figures 1 to 9 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0021] As attached Figure 1 -Attached Fig. 9 , a butterfly valve with a locking structure, comprising a valve body 1, a butterfly plate 2, a valve shaft 6 and a rotating rod 19, wherein the butterfly plate 2 controls the opening and closing of the valve body 1 by the rotation of the valve shaft 6; The valve shaft 6 in the valve body 1 is controlled to rotate by the control device 5. The rotating rod 19 is arranged in the control device 5. The control device 5 is provided with a transmission mechanism. The transmission mechanism includes a first gear 28 for driving arranged outside the rotating rod 19. The valve shaft 6 rotates through the meshing action of the first gear 28. It should be noted that there is no direct meshing between the valve shaft 6 and the first gear 28, but the power is transmitted through the meshing connection of multiple structures. See attached Figure 1 During normal operation, when the rotating rod 19 rotates, the valve shaft 6 rotates, and then drives the butterfly plate 2 to rotate, so as to control the opening and closing of the valve body 1.

[0022] A first seal 3 and a second seal 4 are provided between the control device 5 and the valve body 1, and the first seal 3 and the second seal 4 are connected by a plurality of bolts. A rotating handle 13 is fixedly connected to one end of the rotating rod 19 outside the control device 5. The first seal 3 and the second seal 4 are used to ensure the airtightness of the transmission during the opening and closing process of the valve body 1, which is an existing conventional setting. The rotating handle 13 is provided to facilitate the operator to rotate the rotating rod 19.

[0023] Embodiment 2: Since the valve body 1 has a limit when closed, this embodiment illustrates the process of releasing the limit before the valve is opened.

[0024] The control device 5 is also provided with a locking mechanism, which is used to release the meshing action of the first gear 28 on the valve shaft 6 when the valve body 1 is closed.

[0025] The specific method is: the locking mechanism includes a locking shaft 12 arranged at the center of the valve shaft 6, the locking shaft 12 is slidably connected to the valve shaft 6, the butterfly plate 2 is provided with a locking chamber 7, and an insertion cavity 8 is provided at the edge, a limit shaft 9 is inserted and connected in the insertion cavity 8, and a plurality of limit grooves 33 corresponding to the limit shaft 9 are provided in the valve body 1. Figure 2 And attached Fig. 9 When the butterfly plate 2 closes the valve body 1, the plurality of limit shafts 9 will enter into the plurality of limit grooves 33, thereby increasing the stability of the butterfly plate 2 when hindering the flow of liquid.

[0026] The inner wall of the locking chamber 7 is connected to a push block 11 through a reset spring, and the push block 11 is connected to the limiting shaft 9 through a connecting rod 10. When the first gear 28 disengages the valve shaft 6, the locking shaft 12 moves downward, and the opposite side of the push block 11 to the locking shaft 12 is set in an inclined manner. When the limiting shaft 9 is in the limiting groove 33, the locking shaft 12 is in a position close to the push block 11. At this time, the push block 11 is close to the inner wall of the locking chamber 7 under the action of the locking shaft 12, and the push block 11 pushes the limiting shaft 9 out of the insertion cavity 8 through the connecting rod 10, so that the limiting shaft 9 is in the limiting groove 33 at this time.

[0027] The locking mechanism also includes a locking gear 23 rotatably connected to the control device 5, a locking disc 25 is fixedly connected to the surface of the locking gear 23 opposite to the locking shaft 12, and a fixed shaft is fixedly connected to the locking disc 25; A lifting plate 27 is slidably connected inside the control device 5, and a sliding frame 26 is fixedly connected to the lifting plate 27. The fixed shaft and the inner wall of the sliding frame 26 are slidably connected. The lifting plate 27 moves up or down under the rotation of the locking disk 25. The end of the lifting plate 27 away from the locking disk 25 is directly above the locking shaft 12. When the lifting plate 27 moves downward, it can drive the locking shaft 12 to move downward.

[0028] When the locking gear 23 rotates, the locking gear 23 drives the locking disc 25 to rotate synchronously. Figure 3 and attached Figure 8When the fixed shaft rotates with the rotation of the locking disc 25, the sliding frame 26 will be driven to move. Because the sliding frame 26 is connected to the lifting plate 27, the lifting plate 27 can only slide in the moving direction of the locking shaft 12, thereby limiting the moving direction of the sliding frame 26, so that the sliding frame 26 and the lifting plate 27 can be driven to move in the up and down directions. When the lifting plate 27 moves down to the lowest position, the limit shaft 9 is in the limit groove 33, which corresponds to the above. When the butterfly plate 2 needs to be rotated to open the valve body 1, and when the lifting plate 27 moves up to the top position, the locking shaft 12 will not push the push block 11 toward the inner side wall of the locking chamber 7, and the push block 11 will move under the action of the reset spring, so that the multiple limit shafts 9 are reset to the insertion cavity 8, so as to contact the limit of the limit shaft 9 on the butterfly plate 2. Then the butterfly plate 2 is rotated through the valve shaft 6, so that the valve body 1 is opened.

[0029] A rotating cylinder 22 is slidably connected to the outer side of the rotating rod 19 located in the control device 5, and the sliding direction of the rotating cylinder 22 is consistent with the setting direction of the rotating rod 19. A locking rack 24 is connected to the rotating cylinder 22, and the locking rack 24 and the locking gear 23 are meshed with each other; it should be noted that the rotating cylinder 22 will rotate with the rotation of the rotating rod 19, but in the setting direction of the rotating rod 19, the rotating rod 19 does not restrict the rotating cylinder 22.

[0030] See attached Figure 7 The inner side wall of the control device 5 is slidably connected with a push rod 21, and the control device 5 is rotatably connected with a push cylinder 14, and an arc-shaped push groove 20 is provided on the push cylinder 14. The inner side wall of the push groove 20 is slidably connected with a push shaft, and the push shaft and the push rod 21 are slidably connected. The positive rotation of the push cylinder 14 can drive the push rod 21 to slide along the setting direction of the rotating rod 19 through the push groove 20; The pushing rod 21 is connected to the rotating cylinder 22, and the two can rotate relative to each other.

[0031] When the valve body 1 needs to be opened, the operator first rotates the push cylinder 14. The push groove 20 provided on the push cylinder 14 will move the push rod 21 during the rotation of the push cylinder 14. The push rod 21 will drive the rotating cylinder 22 to move. When the rotating cylinder 22 moves, the locking rack 24 moves. When the locking rack 24 moves, the locking gear 23 rotates, thereby moving the lifting plate 27 upward, and the limit shaft 9 will move into the insertion cavity 8 under the action of the reset spring, releasing the limit on the rotation of the butterfly plate 2. This facilitates the operator to open the valve body 1 in subsequent operations.

[0032] The end of the pushing cylinder 14 outside the control device 5 is connected to a limit plate 15, and the limit plate 15 is fixedly connected to a limit block 16. The pushing cylinder 14 and the outer wall of the control device 5 are connected to a torsion spring 18 for resetting the pushing cylinder 14.

[0033] A fixed block 17 is connected to the outer wall of the control device 5 through a telescopic rod. The fixed block 17 is used to limit the limit block 16 after rotation. In the positive rotation direction of the pushing cylinder 14, the side of the limit block 16 opposite to the fixed block 17 is set in an inclined manner. When the pushing cylinder 14 is rotated, the operator can push the limit plate 15 to rotate the pushing cylinder 14. During the rotation of the limit plate 15, every time the limit block 16 rotates to the position of the fixed block 17, the fixed block 17 will move up, and then the fixed block 17 will move down under the action of gravity after moving up. After the limit plate 15 is rotated a certain number of times, there is no need to rotate the limit plate 15. At this time, the limit plate 15 has a tendency to reset under the action of the torsion spring 18, and the fixed block 17 can block this tendency to ensure that the state of the pushing cylinder 14 will not change.

[0034] Embodiment 3: This embodiment illustrates the opening process of the valve body 1.

[0035] The first gear 28 is fixedly connected to the outer wall of the rotating cylinder 22, and the first gear 28 can move in the setting direction of the rotating rod 19 along with the movement of the rotating cylinder 22; Two symmetrically arranged mounting shafts 29 are rotatably connected on one side of the rotating rod 19, and a second gear 30 is fixedly connected to the mounting shaft 29 close to the rotating rod 19. A transmission chain 31 is arranged between the two mounting shafts 29, and a plurality of driving teeth are arranged on one side of the transmission chain 31 close to the valve shaft 6; An opening and closing gear 32 is fixedly connected to the outer wall at the top of the valve shaft 6. The opening and closing gear 32 is located on the side of the transmission chain 31 parallel to the bottom position inside the control device 5. When the transmission chain 31 is transmitting, the opening and closing gear 32 can be driven to rotate by pushing the teeth. The rotation of the opening and closing gear 32 is used to drive the rotation of the valve shaft 6.

[0036] The rotating rod 19 is located in the pushing cylinder 14 , and the rotating rod 19 is rotationally connected to the pushing cylinder 14 , and the pushing cylinder 14 and the rotating rod 19 can rotate independently of each other.

[0037] In the process of releasing the limit of the butterfly plate 2 by locking the rack 24 when the rotating cylinder 22 moves, the first gear 28 will also move with the movement of the rotating cylinder 22. After the limit shaft 9 is reset, the first gear 28 will also move to the position meshing with the second gear 30. At this time, the operator drives the rotating rod 19 to rotate, and the rotating rod 19 can drive the rotating cylinder 22 and the first gear 28 connected to the surface of the rotating cylinder 22 to rotate, thereby making the second gear 30 rotate synchronously. Figure 2 The second gear 30 drives the transmission chain 31 through the mounting shaft 29 to transmit. The stable section at the lower end of the transmission chain 31 is at the same height as the opening and closing gear 32. When the transmission chain 31 is transmitted, it drives the opening and closing gear 32 to rotate, thereby driving the valve shaft 6 and the butterfly plate 2 to rotate synchronously to control the opening of the valve body 1.

[0038] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A butterfly valve with a locking structure, characterized in that: It comprises a valve body (1), a butterfly plate (2), a valve shaft (6) and a rotating rod (19), wherein the butterfly plate (2) controls the opening and closing of the valve body (1) through the rotation of the valve shaft (6); The valve shaft (6) in the valve body (1) is controlled to rotate by a control device (5). The rotating rod (19) is arranged in the control device (5). A transmission mechanism is arranged in the control device (5). The transmission mechanism includes a first gear (28) for driving and arranged on the outside of the rotating rod (19). The valve shaft (6) is rotated by the meshing action of the first gear (28). A locking mechanism is also arranged in the control device (5). The locking mechanism is used to release the meshing action of the first gear (28) on the valve shaft (6) when the valve body (1) is closed.

2. A butterfly valve with a locking structure according to claim 1, characterized in that: The locking mechanism comprises a locking shaft (12) arranged at the center of the valve shaft (6), the locking shaft (12) being slidably connected to the valve shaft (6), a locking chamber (7) being provided in the butterfly plate (2), and an insertion cavity (8) being provided at the edge, a limit shaft (9) being inserted and connected in the insertion cavity (8), and a plurality of limit grooves (33) corresponding to the limit shaft (9) being provided in the valve body (1); The inner wall of the locking chamber (7) is connected to a push block (11) via a return spring, and the push block (11) is connected to the limit shaft (9) via a connecting rod (10). When the first gear (28) is disengaged from the valve shaft (6), the locking shaft (12) moves downward, and the side of the push block (11) opposite to the locking shaft (12) is arranged in an inclined manner.

3. A butterfly valve with a locking structure according to claim 2, characterized in that: The locking mechanism further comprises a locking gear (23) rotatably connected to the control device (5); a locking disc (25) is fixedly connected to a surface of the locking gear (23) opposite to the locking shaft (12); and a fixed shaft is fixedly connected to the locking disc (25); A lifting plate (27) is slidably connected inside the control device (5), a sliding frame (26) is fixedly connected to the lifting plate (27), and a fixed shaft is slidably connected to an inner side wall of the sliding frame (26). The lifting plate (27) moves upward or downward under the rotation of the locking disc (25), and one end of the lifting plate (27) away from the locking disc (25) is located directly above the locking shaft (12). When the lifting plate (27) moves downward, it can drive the locking shaft (12) to move downward.

4. A butterfly valve with a locking structure according to claim 3, characterized in that: A rotating cylinder (22) is slidably connected to the outer side of the rotating rod (19) located in the control device (5); the sliding direction of the rotating cylinder (22) is consistent with the setting direction of the rotating rod (19); a locking rack (24) is connected to the rotating cylinder (22); the locking rack (24) and the locking gear (23) are meshed with each other; The inner side wall of the control device (5) is slidably connected to a pushing rod (21), the control device (5) is rotatably connected to a pushing cylinder (14), the pushing cylinder (14) is provided with an arc-shaped pushing groove (20), the inner side wall of the pushing groove (20) is slidably connected to a pushing shaft, the pushing shaft and the pushing rod (21) are slidably connected, and the positive rotation of the pushing cylinder (14) can drive the pushing rod (21) to slide along the setting direction of the rotating rod (19) through the pushing groove (20); The pushing rod (21) is connected to the rotating cylinder (22), and the two can rotate relative to each other.

5. A butterfly valve with a locking structure according to claim 4, characterized in that: The pushing cylinder (14) is connected to a limit plate (15) at one end outside the control device (5), the limit plate (15) is fixedly connected to a limit block (16), and a torsion spring (18) for resetting the pushing cylinder (14) is connected to the outer wall of the pushing cylinder (14) and the control device (5); A fixing block (17) is connected to the outer wall of the control device (5) via a telescopic rod. The fixing block (17) is used to limit the position of the limit block (16) after rotation. In the positive rotation direction of the pushing cylinder (14), the side of the limit block (16) opposite to the fixing block (17) is arranged in an inclined manner.

6. A butterfly valve with a locking structure according to claim 4, characterized in that: The first gear (28) is fixedly connected to the outer wall of the rotating cylinder (22), and the first gear (28) can move in the setting direction of the rotating rod (19) as the rotating cylinder (22) moves; Two symmetrically arranged mounting shafts (29) are rotatably connected on one side of the setting direction of the rotating rod (19) and on the inner side wall of the control device (5); a second gear (30) is fixedly connected to the mounting shaft (29) close to the rotating rod (19); a common transmission chain (31) is arranged between the two mounting shafts (29); and a plurality of driving teeth are arranged on one side of the transmission chain (31) close to the valve shaft (6); An opening and closing gear (32) is fixedly connected to the outer wall at the top end of the valve shaft (6). The opening and closing gear (32) is located on the side of the transmission chain (31) parallel to the bottom position inside the control device (5). When the transmission chain (31) is transmitting, the opening and closing gear (32) can be driven to rotate by the pushing tooth. The rotation of the opening and closing gear (32) is used to drive the rotation of the valve shaft (6).

7. The butterfly valve with a locking structure according to claim 1, characterized in that: A first sealing member (3) and a second sealing member (4) are provided between the control device (5) and the valve body (1), and the first sealing member (3) and the second sealing member (4) are connected via a plurality of bolts.

8. The butterfly valve with a locking structure according to claim 1, characterized in that: A rotating handle (13) is fixedly connected to one end of the rotating rod (19) outside the control device (5).

9. The butterfly valve with a locking structure according to claim 4, characterized in that: The rotating rod (19) is located in the pushing cylinder (14), and the rotating rod (19) is rotatably connected to the pushing cylinder (14). The pushing cylinder (14) and the rotating rod (19) can rotate independently of each other.

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