A butterfly valve with high sealing performance

Abstract

The present application relates to the technical field of butterfly valves, and in particular to a butterfly valve with high sealing performance, comprising a valve body, wherein the valve body is provided with a valve stem, a valve plate, a sealing ring, and a pressure plate in sequence along the axial direction, a mounting seat being fixedly installed between the stem of the valve stem and the valve plate, an electric actuator being provided on the top side of the valve body, one end of the valve stem being rotatably inserted into the inner bottom wall of the valve body, the other end of the valve stem being rotatably inserted through the top side of the valve body and connected to the electric actuator, the sealing ring being fixedly installed on the valve plate, the pressure plate being slidably installed inside the valve body, a pull rope being fixedly installed on the side of the pressure plate close to the valve plate, the end of the pull rope away from the valve plate slidingly passing through the valve plate and the mounting seat and then fixedly connected to the inner bottom wall of the valve body. The present application has the effect of improving the sealing performance of the butterfly valve.

Description

Technical Field

[0001] The present application relates to the technical field of butterfly valves, and in particular to a butterfly valve with high sealing performance. Background Art

[0002] Butterfly valves, as a common fluid control device, are widely used in industries such as industry and agriculture. They play a vital role in pipeline systems due to their advantages such as fast opening and closing speeds, low operating torque, and compact installation space. Their structural design enables them to quickly open and close fluid passages, thereby improving production efficiency and system stability while reducing equipment maintenance costs.

[0003] At present, in order to solve the problem of poor sealing performance of butterfly valves, the industry usually adopts the following methods: First, the sealing effect is improved by increasing the thickness of the sealing material or replacing high-performance sealing materials; second, the shape of the contact surface between the valve plate and the valve seat is optimized, such as using a conical sealing surface or a spherical sealing surface; third, by adding an auxiliary clamping device, mechanical force is used to tightly fit the valve plate and the valve seat.

[0004] However, during the opening and closing of the butterfly valve, the sealing ring presses against the inner wall of the valve body and moves, which is prone to wear due to friction, thereby reducing the sealing performance. This wear not only shortens the service life of the butterfly valve, but may also cause problems such as fluid leakage. Summary of the Invention

[0005] In order to improve the sealing performance of a butterfly valve, the present application provides a butterfly valve with high sealing performance.

[0006] This application provides a high sealing performance butterfly valve, which adopts the following technical solutions:

[0007] A butterfly valve with high sealing performance includes a valve body, on which a valve stem, a valve plate, a sealing ring and a pressure plate are sequentially arranged axially. A mounting seat is fixedly installed between the stem of the valve stem and the valve plate. An electric actuator is provided on the top side of the valve body. One end of the valve stem is rotatably inserted into the inner bottom wall of the valve body, and the other end of the valve stem is rotatably passed through the top side of the valve body and is connected to the electric actuator. The sealing ring is fixedly installed on the valve plate, and the pressure plate is slidably installed inside the valve body. A pull rope is fixedly installed on the side of the pressure plate close to the valve plate, and the end of the pull rope away from the valve plate slides through the valve plate and the mounting seat and is fixedly connected to the inner bottom wall of the valve body.

[0008] By adopting this technical solution, when the electric actuator closes the butterfly valve, the pull cord tightens, causing the pressure plate to press against the sealing ring. The sealing ring expands and presses against the inner wall of the valve body, thereby improving the sealing performance of the butterfly valve. When the electric actuator opens the butterfly valve, the pull cord loosens, the sealing ring returns to its original position, and the pressure plate moves away from the valve plate. This reduces the pressure of the sealing ring on the inner wall of the valve body, thereby reducing wear on the sealing ring and improving the sealing performance of the butterfly valve.

[0009] Optionally, the mounting seat is provided with a sliding opening, a sliding rod is rotatably installed inside the sliding opening, a slider is provided inside the sliding opening, the sliding rod thread passes through the slider, and the pull rope slides through the slider.

[0010] By adopting the above technical solution, the threaded connection structure between the slide rod and the slider can achieve precise displacement of the slider on the slide rod, thereby ensuring that the tension of the pull rope is adjustable and improving the stability of the sealing performance.

[0011] Optionally, ratchets are fixedly sleeved at both ends of the sliding rod, and the ratchet is provided with a lifting rod. The mounting seat is provided with a lifting port for the lifting rod to lift and slide, and the lifting port is connected to the sliding port. The lifting rod is elastically hinged with a pawl, and the lifting rod is installed with a driving mechanism, and the driving mechanism is used to drive the lifting rod to lift and lower, and the lifting rods located at both ends of the sliding rod descend to drive the ratchets to rotate in the opposite direction.

[0012] By adopting this technical solution, the ratchets fixed at both ends of the slide bar cooperate with the lifting rods to achieve precise control of the slide bar's rotation. When the lifting rod descends, the hinged pawls drive the ratchets to rotate. The lifting rods at both ends of the slide bar rotate in opposite directions when they descend, thus ensuring the slide bar's bidirectional adjustment capability.

[0013] Optionally, the driving mechanism includes a driving block and an electromagnet, the driving block is fixedly mounted on the bottom end of the lifting rod, the electromagnet is arranged on the outer bottom wall of the valve body, the electromagnet is used to attract the driving block, the driving block and the lifting rod both have buoyancy, and the electric actuator has a built-in control module, and the control module is used to open and close the electromagnet.

[0014] By employing this technical solution, the attraction between the electromagnet and the drive block precisely controls the lifting and lowering of the lift rod, thereby adjusting the engagement between the pawl and ratchet. This design not only improves the stability of the ratchet drive but also utilizes buoyancy to assist in resetting the lift rod without the need for additional mechanical power, effectively reducing energy consumption. Furthermore, the electric actuator's built-in control module activates and closes the electromagnet, achieving automated control and further enhancing the convenience and reliability of butterfly valve operation.

[0015] Optionally, a mounting port is provided in the portion of the valve body located below the driving block, a shielding film is fixedly installed on the top edge of the mounting port, the electromagnet is located inside the mounting port, a connecting rod is fixedly installed on the circumference of the electromagnet, and the inner wall of the mounting port is provided with a first connecting groove and a second connecting groove for sliding of the connecting rod, the first connecting groove is arranged along the axial direction of the mounting port, the second connecting groove is arranged along the circumferential direction of the inner wall of the mounting port, and one end of the first connecting groove is connected to the top end of the second connecting groove.

[0016] By adopting this technical solution, the shielding film can effectively prevent fluid from entering the interior of the mounting opening, protecting components such as the electromagnet from fluid erosion, thereby improving the reliability of the device. The provision of the first and second connecting grooves allows the connecting rod to slide axially and circumferentially within the mounting opening, facilitating the securement of the electromagnet within the mounting opening.

[0017] Optionally, a partition block is fixedly installed on the bottom side of the electromagnet, a pressure sensor is fixedly installed on the bottom side of the partition block, the connecting rod is fixedly installed on the peripheral side of the pressure sensor, the pressure sensor generates a pressure signal according to the pressure exerted on the electromagnet, and the control module controls the magnetic force of the electromagnet according to the pressure signal.

[0018] By employing this technical solution, precise control of the electromagnet's magnetic force is achieved. A pressure sensor monitors the pressure acting on the electromagnet in real time and transmits the pressure signal to the control module. The control module adjusts the electromagnet's magnetic force based on the pressure signal, ensuring the electromagnet's attraction to the driver block remains optimal.

[0019] Optionally, absorbent cotton is fixedly installed on the top side of the driving block, and a water-absorbing rope is connected to the peripheral side of the absorbent cotton. A guide groove body is hinged on the peripheral side of the driving block, and a limiting rod is fixedly installed between the two inner walls of the guide groove body. A floating block is fixedly installed on the end of the guide groove body away from the driving block, and the water-absorbing rope is arranged along the guide groove body and fixedly connected to the floating block. The floating block rotates downward and abuts against the inner bottom wall of the valve body, and the floating block floats upward to damp the insertion slide.

[0020] By adopting this technical solution, when the butterfly valve is opened, the driver block floats upward and presses against the absorbent cotton, reducing its water absorption. Simultaneously, the floating block floats upward and acts as a damper within the slide. When the butterfly valve is closed, water drains from the side of the valve plate away from the pressure plate, causing the driver block to descend under gravity. Simultaneously, the driver block lowers the guide trough, allowing the floating block to be removed from the slide. After the floating block is removed from the slide, the guide trough rotates downward, forcing the floating block to rest against the inner bottom wall of the valve body. If the butterfly valve leaks, the absorbent rope will direct water to the absorbent cotton, increasing its weight and reducing the suction force required by the electromagnet to lower the driver block.

[0021] Optionally, a guide rod is fixedly mounted on one side of the valve plate close to the pressure plate, the guide rod slides through the pressure plate, and a limit block is fixedly mounted on one end of the guide rod away from the valve plate.

[0022] By adopting the above technical solution, the guide rod can guide the sliding of the pressure plate, ensuring stable axial movement of the pressure plate within the valve body. The limit block effectively prevents the pressure plate from separating from the guide rod, thereby ensuring the reliability and stability of the entire butterfly valve structure.

[0023] Optionally, a first elastic tube is provided on a side of the valve plate away from the pressure plate, a peripheral side of the first elastic tube is fixedly connected to the valve plate, and the pull rope is fixedly passed through the first elastic tube.

[0024] By adopting the above technical solution, the provision of the first elastic tube can effectively prevent the fluid from leaking from the gap between the valve plate and the pull rope, thereby improving the overall sealing performance of the butterfly valve.

[0025] Optionally, a second elastic tube is fixedly installed between the valve plate and the pressure plate, and the sealing ring is sleeved on the second elastic tube.

[0026] By adopting the above technical solution, the provision of the second elastic tube improves the sealing between the valve plate and the pressure plate, thereby reducing the ingress of water between the valve plate and the pressure plate.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] The electric actuator drives the valve stem to rotate, which drives the valve plate to rotate to realize the opening and closing operation of the butterfly valve. At the same time, when the butterfly valve is closed, the pull rope is tightened, and the pull rope drives the pressure plate to press the sealing ring, thereby effectively improving the sealing performance of the butterfly valve. When the butterfly valve is opened, the pull rope is loosened, which makes it easier for the pressure plate to loosen the sealing ring, reducing the pressing force of the sealing ring on the inside of the valve body, thereby reducing the friction loss between the sealing ring and the inside of the valve body;

[0029] By rotating the slide rod to adjust the position of the slider inside the slide, it is convenient to adjust the tightness of the pull rope when the sticker butterfly valve is closed, and then it is convenient to adjust the pressing force of the pressure plate on the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the present application from a first perspective;

[0031] Figure 2 yes Figure 1 Cross-sectional view at AA;

[0032] Figure 3 yes Figure 2 Enlarged view at point A;

[0033] Figure 4 This is an exploded view of the guide rod of an embodiment of the present application;

[0034] Figure 5 This is a schematic diagram of the structure inside the valve body of an embodiment of the present application;

[0035] Figure 6 This is a schematic structural diagram of the mounting base according to an embodiment of the present application;

[0036] Figure 7 This is a schematic diagram of the overall structure of the embodiment of the present application from a second perspective;

[0037] Figure 8 yes Figure 7 Enlarged view at point B;

[0038] Figure 9 yes Figure 1 Enlarged view at point C;

[0039] Figure 10 It is a structural schematic diagram of the guide groove body and the floating block of an embodiment of the present application.

[0040] Explanation of the accompanying symbols: 1. Valve body; 2. Valve stem; 3. Electric actuator; 4. Valve plate; 5. Mounting seat; 6. Sealing ring; 7. Pressure plate; 8. Guide rod; 9. Limit block; 10. Slide; 11. Slide rod; 12. Slider; 13. Pull rope; 14. Ratchet; 15. Pawl; 16. Lifting rod; 17. Lifting port; 18. Mounting groove; 19. Elastic rope; 20. Driving mechanism; 201. Driving block; 202. Electromagnet; 21. Mounting port; 22. Shielding film; 23. Partition block; 24. Pressure sensor; 25. Connecting rod; 26. First connecting groove; 27. Second connecting groove; 28. Absorbent cotton; 29. Absorbent rope; 30. Guide groove body; 31. Limiting rod; 32. Floating block; 33. First elastic tube; 34. Second elastic tube. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-10 This application is described in further detail.

[0042] The embodiment of the present application discloses a butterfly valve with high sealing performance.

[0043] Reference Figure 1 A high-sealing butterfly valve comprises a valve body 1, which is provided with a valve stem 2. An electric actuator 3 is provided on the top side of the valve body 1. One end of the valve stem 2 is fixedly connected to the electric actuator 3. The other end of the valve stem 2 rotates through the top side of the valve body 1 and then rotates to insert into the inner bottom wall of the valve body 1. The hole formed by the valve body 1 passing through the valve body 1 is sealed with packing. The electric actuator 3 is used to drive the valve stem 2 to rotate.

[0044] Reference Figure 2 、 Figure 3 A valve plate 4 is provided inside the valve body 1, and a mounting seat 5 is fixedly mounted between the stem of the valve stem 2 and one side of the valve plate 4. A sealing ring 6 is fixedly mounted along the edge of the side of the valve plate 4 away from the valve stem 2. A pressure plate 7 is placed against the side of the sealing ring 6 away from the valve plate 4.

[0045] Reference Figure 3 、 Figure 4A guide rod 8 is fixedly mounted on the side of the valve plate 4 near the pressure plate 7. The guide rod 8 slides through the pressure plate 7. The guide rod 8 guides the pressure plate 7 as it slides axially along the valve body 1, thereby improving the stability of the pressure plate 7's movement. A limit block 9 is fixedly mounted on the end of the guide rod 8 away from the valve plate 4. The limit block 9 limits the position of the pressure plate 7, thereby preventing the pressure plate 7 from falling off the guide rod 8.

[0046] Reference Figure 5 、 Figure 6 The mounting seat 5 is provided with a sliding opening 10, within which a sliding rod 11 is rotatably mounted. A slider 12 is disposed within the sliding opening 10, and the sliding rod 11 is threadedly inserted through the slider 12. Rotating the sliding rod 11 causes the slider 12 to slide within the sliding opening 10. A pull cord 13 is fixedly mounted on the side of the pressure plate 7 closest to the valve plate 4. The end of the pull cord 13, facing away from the valve plate 4, slides through the valve plate 4 and the slider 12, and is then fixedly connected to the inner bottom wall of the valve body 1.

[0047] When the butterfly valve is opened, the pull rope 13 is loosened, thereby restoring the sealing ring 6 and reducing the pressing force of the sealing ring 6 on the inner wall of the valve body 1, thereby reducing the friction loss between the sealing ring 6 and the inner wall of the valve body 1, and further improving the sealing performance of the butterfly valve.

[0048] When the butterfly valve is closed, the pull rope 13 is tightened, and the pull rope 13 drives the pressure plate 7 to press the sealing ring 6. After the sealing ring 6 expands, it presses the inner wall of the valve body 1, thereby improving the sealing performance of the butterfly valve.

[0049] Reference Figure 3 、 Figure 6 Both ends of the slide bar 11 are fixedly sleeved with ratchets 14, and the ratchet 14 is provided with a lifting rod 16. The mounting seat 5 is provided with a lifting opening 17 for the lifting rod 16 to slide up and down, and the lifting opening 17 is connected to the sliding opening 10. The lifting rod 16 is provided with a mounting slot 18, and a pawl 15 is hingedly connected to the inner wall of the mounting slot 18. The pawl 15 rotates upward and abuts against the inner top wall of the mounting slot 18, thereby acting as a limiter. The top side of the pawl 15 is connected to an elastic rope 19, and the end of the elastic rope 19 away from the pawl 15 is fixedly connected to the lifting rod 16. The elastic rope 19 is used to drive the pawl 15 to rotate upward, thereby realizing an elastic hinge between the pawl 15 and the lifting rod 16.

[0050] Reference Figure 3 The lifting rod 16 is equipped with a drive mechanism 20 for driving the lifting rod 16 upward and downward. When the lifting rods 16 at either end of the slide bar 11 descend, the ratchet wheels 14 rotate in opposite directions. When the drive mechanism 20 drives the lifting rod 16 downward, the pawl 15 shifts the ratchet wheels 14, thereby rotating the slide bar 11, thereby facilitating adjustment of the position of the slider 12 within the slide 10. By adjusting the position of the slider 12 within the slide 10, the tension exerted by the pull rope 13 on the pressure plate 7 can be easily adjusted after the butterfly valve is closed.

[0051] Reference Figure 3 The drive mechanism 20 includes a drive block 201 and an electromagnet 202. The drive block 201 is fixedly mounted to the bottom end of the lifting rod 16. The electromagnet 202 is located on the outer bottom wall of the valve body 1 and is used to attract the drive block 201. Both the drive block 201 and the lifting rod 16 have buoyancy. The electric actuator 3 has a built-in control module that is used to turn the electromagnet 202 on and off.

[0052] When the butterfly valve is open, water flows through it, causing the driver block 201 to float upward. When the butterfly valve is closed, water drains from the side of the valve plate 4 away from the pressure plate 7, causing the driver block 201 to move downward under gravity, forcing the pawl 15 to abut against the ratchet 14. The control module then activates the electromagnet 202, which attracts the driver block 201, causing it to descend further, thereby causing the pawl 15 to rotate the ratchet 14. By activating the electromagnets 202 under different lifting rods 16, the sliding movement of the slider 12 within the sliding port 10 is controlled, thereby facilitating adjustment of the tension of the pull rope 13 on the pressure plate 7.

[0053] Reference Figure 3 、 Figure 7 、 Figure 8 The portion of the valve body 1 located below the drive block 201 is provided with an installation opening 21, and a shielding film 22 is fixedly installed on the top edge of the installation opening 21. The electromagnet 202 is located inside the installation opening 21 and abuts against the shielding film 22. A partition block 23 is fixedly installed on the bottom side of the electromagnet 202, and a pressure sensor 24 is fixedly installed on the bottom side of the partition block 23. A connecting rod 25 is fixedly installed on the circumferential side of the pressure sensor 24. The inner wall of the installation opening 21 is provided with a first connecting groove 26 and a second connecting groove 27 for the sliding movement of the connecting rod 25. The first connecting groove 26 is arranged along the axial direction of the installation opening 21, and the second connecting groove 27 is arranged along the circumferential direction of the inner wall of the installation opening 21. One end of the first connecting groove 26 is connected to the top end of the second connecting groove 27.

[0054] The connecting rod 25 enters the second connecting groove 27 from the first connecting groove 26, thereby facilitating the installation of the electromagnet 202 on the valve body 1. At the same time, the installation opening 21 reduces the distance between the electromagnet 202 and the driving block 201, thereby facilitating the electromagnet 202 to attract the driving block 201.

[0055] Each time the electromagnet 202 attracts the driver block 201, causing the ratchet 14 to rotate, the driver block 201 strikes the electromagnet 202, increasing the pressure detected by the pressure sensor 24. Based on the pressure, the pressure sensor 24 generates a pressure signal and transmits it to the control module. Each time the pawl 15 turns the ratchet 14, the slider 12 slides. Based on the pressure signal, the control module counts the number of times the two driver blocks 201 strike the electromagnet 202, thereby facilitating the calculation of the number of times the pawl 15 turns the ratchet 14.

[0056] The number of rotations of one ratchet wheel 14 is positive, while the number of rotations of the other is negative. The control module adds the rotation numbers of the two ratchet wheels 14 to obtain an offset value. The control module has pre-loaded an offset comparison table that maps offset values to the required attractive force of the electromagnet 202. Based on the offset value and the offset comparison table, the control module adjusts the attractive force of the electromagnet 202 on the driving block 201, thereby facilitating the electromagnet 202 to attract the driving block 201 downward.

[0057] Reference Figure 9 、 Figure 10 A water-absorbing sponge 28 is fixedly mounted on the top side of the driving block 201, and a water-absorbing rope 29 is connected to the circumference of the water-absorbing sponge 28. A guide trough 30 is hingedly connected to the circumference of the driving block 201, and a limit rod 31 is fixedly mounted between the two inner side walls of the guide trough 30. A floating block 32 is fixedly mounted on the end of the guide trough 30 away from the driving block 201. The water-absorbing rope 29 is arranged along the guide trough 30 and fixedly connected to the floating block 32.

[0058] When the butterfly valve opens, the driver block 201 floats and squeezes the absorbent sponge 28, reducing the amount of water absorbed by the sponge 28. The float 32, driven by the buoyancy force, moves upward and, with a damping force, inserts into the interior of the slide 10. After the butterfly valve closes, the water on the side of the valve plate 4 away from the pressure plate 7 gradually drains. The driver block 201 descends, releasing the absorbent sponge 28. After the driver block 201 descends, the pawl 15 abuts against the ratchet 14, and the driver block 201 stops descending. Simultaneously, the float 32 is pulled out of the slide 10. Then, under the force of gravity, the float 32 rotates downward and abuts against the inner bottom wall of the valve body 1.

[0059] After the float 32 abuts against the inner bottom wall of the valve body 1, if the butterfly valve is leaking, the absorbent cotton 28 does not absorb water and its weight is light. The electromagnet 202, which tightens the pull rope 13, opens to attract the drive block 201 after the butterfly valve has been closed for a period of time. However, the attraction of the electromagnet 202 is weak, and the drive block 201 cannot descend.

[0060] If the butterfly valve leaks, the absorbent sponge 28 will direct water toward it, increasing its weight. After the butterfly valve has been closed for a period of time, the electromagnet 202, which has tightened the pull cord 13, turns on and attracts the drive block 201. The attraction of the electromagnet 202 to the drive block 201 and the weight of the absorbent sponge 28 cause the drive block 201 to descend. After the drive block 201 descends, the pawl 15 shifts the ratchet wheel 14, causing the pull cord 13 to further tighten the pressure plate 7, thereby stopping the leakage in the butterfly valve.

[0061] Reference Figure 2 、 Figure 3A first elastic tube 33 is installed on the side of the valve plate 4 facing away from the pressure plate 7. The circumference of the first elastic tube 33 is fixedly connected to the valve plate 4, and the pull rope 13 is fixedly inserted through the first elastic tube 33. A second elastic tube 34 is fixedly installed between the valve plate 4 and the pressure plate 7, and the sealing ring 6 is mounted on the second elastic tube 34. Both the first elastic tube 33 and the second elastic tube 34 provide a seal, thereby reducing the risk of water entering the space between the pressure plate 7 and the valve plate 4. The second elastic tube 34 also supports the sealing ring 6, thereby improving the sealing performance of the butterfly valve.

[0062] The high-sealing performance butterfly valve of this embodiment is implemented as follows: When the butterfly valve is closed, the pull rope 13 pulls the pressure plate 7, causing the pressure plate 7 to press against the sealing ring 6. The sealing ring 6 is squeezed by the pressure plate 7 and expands to press against the inner wall of the valve body 1, thereby improving the sealing performance of the butterfly valve.

[0063] When the butterfly valve is opened, the pull rope 13 is loosened, so that the pressure plate 7 releases the sealing ring 6. The sealing ring 6 recovers, thereby reducing the pressing force of the sealing ring 6 on the inner wall of the valve body 1, thereby reducing the friction loss between the sealing ring 6 and the valve body 1, and improving the sealing performance of the butterfly valve.

[0064] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A high sealing performance butterfly valve, characterized by: The valve body (1) comprises a valve stem (2), a valve plate (4), a sealing ring (6) and a pressure plate (7) arranged in sequence along the axial direction of the valve body (1); a mounting seat (5) is fixedly installed between the stem of the valve stem (2) and the valve plate (4); an electric actuator (3) is arranged on the top side of the valve body (1); one end of the valve stem (2) is rotatably inserted into the inner bottom wall of the valve body (1); the other end of the valve stem (2) is rotatably penetrated through the top side of the valve body (1) and connected to the electric actuator (3); the sealing ring (6) is fixedly installed on the valve plate (4); the pressure plate (7) is slidably installed inside the valve body (1); a pull rope (13) is fixedly installed on the side of the pressure plate (7) close to the valve plate (4); the pull rope (13) is fixedly connected to the inner bottom wall of the valve body (1) after the end away from the valve plate (4) slides through the valve plate (4) and the mounting seat (5); The mounting seat (5) is provided with a sliding opening (10), a sliding rod (11) is rotatably installed inside the sliding opening (10), a slider (12) is provided inside the sliding opening (10), the sliding rod (11) is threadedly passed through the slider (12), and the pull rope (13) is slidably passed through the slider (12); Both ends of the slide bar (11) are fixedly sleeved with ratchets (14), and the ratchet (14) is provided with a lifting rod (16). The mounting seat (5) is provided with a lifting port (17) for the lifting rod (16) to slide up and down, and the lifting port (17) is communicated with the sliding port (10). The lifting rod (16) is elastically hinged with a ratchet (15). The lifting rod (16) is installed with a driving mechanism (20), and the driving mechanism (20) is used to drive the lifting rod (16) to move up and down. When the lifting rods (16) at both ends of the slide bar (11) descend, the rotation direction of the ratchet (14) is opposite. The driving mechanism (20) comprises a driving block (201) and an electromagnet (202), wherein the driving block (201) is fixedly mounted on the bottom end of the lifting rod (16), and the electromagnet (202) is arranged on the outer bottom wall of the valve body (1), and the electromagnet (202) is used to attract the driving block (201). Both the driving block (201) and the lifting rod (16) have buoyancy, and the electric actuator (3) is equipped with a built-in control module, and the control module is used to open and close the electromagnet (202).

2. A high sealing performance butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with a mounting opening (21) at a portion located below the driving block (201), a shielding film (22) is fixedly installed on the top edge of the mounting opening (21), the electromagnet (202) is located inside the mounting opening (21), a connecting rod (25) is fixedly installed on the circumference of the electromagnet (202), and the inner wall of the mounting opening (21) is provided with a first connecting groove (26) and a second connecting groove (27) for the connecting rod (25) to slide, the first connecting groove (26) is arranged along the axial direction of the mounting opening (21), and the second connecting groove (27) is arranged along the circumference of the inner wall of the mounting opening (21), and one end of the first connecting groove (26) is connected to the top end of the second connecting groove (27).

3. A high sealing performance butterfly valve according to claim 2, characterized in that: A partition block (23) is fixedly mounted on the bottom side of the electromagnet (202), a pressure sensor (24) is fixedly mounted on the bottom side of the partition block (23), the connecting rod (25) is fixedly mounted on the peripheral side of the pressure sensor (24), the pressure sensor (24) generates a pressure signal according to the pressure applied to the electromagnet (202), and the control module controls the magnetic force of the electromagnet (202) according to the pressure signal.

4. The high sealing performance butterfly valve according to claim 1, characterized in that: A water-absorbing cotton (28) is fixedly installed on the top side of the driving block (201), and a water-absorbing rope (29) is connected to the peripheral side of the water-absorbing cotton (28). A guide groove body (30) is hingedly connected to the peripheral side of the driving block (201). A limiting rod (31) is fixedly installed between the two inner side walls of the guide groove body (30). A floating block (32) is fixedly installed at one end of the guide groove body (30) away from the driving block (201). The water-absorbing rope (29) is arranged along the guide groove body (30) and is fixedly connected to the floating block (32). The floating block (32) rotates downward to abut against the inner bottom wall of the valve body (1), and the floating block (32) floats upward to damp and insert into the sliding port (10).

5. The high sealing performance butterfly valve according to claim 1, characterized in that: A guide rod (8) is fixedly mounted on one side of the valve plate (4) close to the pressure plate (7), the guide rod (8) slides through the pressure plate (7), and a limit block (9) is fixedly mounted on one end of the guide rod (8) away from the valve plate (4).

6. The high sealing performance butterfly valve according to claim 1, characterized in that: A first elastic tube (33) is provided on a side of the valve plate (4) away from the pressure plate (7), the circumference of the first elastic tube (33) is fixedly connected to the valve plate (4), and the pull rope (13) is fixedly passed through the first elastic tube (33).

7. The high sealing performance butterfly valve according to claim 1, characterized in that: A second elastic tube (34) is fixedly installed between the valve plate (4) and the pressure plate (7), and the sealing ring (6) is sleeved on the second elastic tube (34).

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