High-temperature-resistant light-weight butterfly valve executing mechanism

Abstract

The invention relates to the technical field of valves, in particular to a high-temperature-resistant light-weight butterfly valve executing mechanism which is used for solving the problems that sealing fails, equipment is heavy and heat dissipation and maintenance are difficult in a high-temperature environment. The mechanism comprises two connecting pipes with connecting flanges and a valve body arranged between the connecting pipes, and communicated annular cavities are formed in the connecting pipes, the connecting flanges and the valve body. The top of the valve body is connected with a supporting circular plate and an execution box through a sealing cylinder. The bottom of the valve body is rotationally connected with a hollow valve rod through a fixing sleeve rod. A sliding driving assembly with a worm and gear is arranged in the execution box, a sealing top plate and a fixed annular plate are installed on the top, and replaceable arc-shaped filter screens are arranged on the two sides of the annular plate. Air flow is guided into the valve rod through the air inlet fan after being filtered by the arc-shaped filter screen, flows to the cavity of the valve clack for primary heat exchange, then enters the annular cavity for secondary heat exchange, and finally returns to the execution box through the gap between the sealing cylinder and the valve rod to be discharged. When the arc-shaped filter screen is replaced, the rotating cover plate is overturned to trigger the fan-shaped baffle to automatically close the air duct.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a high-temperature resistant lightweight butterfly valve actuator. Background Art

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on-off control of low-pressure pipeline media. A butterfly valve is a valve whose closing member (valve disc or disc) is a disc that rotates around the valve shaft to open and close. In the field of industrial fluid control, butterfly valves, as key actuators, must operate in high-temperature and high-pressure environments for long periods of time. Traditional butterfly valve actuators have the following technical bottlenecks: Insufficient high-temperature resistance: Conventional metal structures are prone to seal failure due to thermal expansion in high-temperature fluid environments, and continuous high temperatures will accelerate the aging of drive components such as motors; Conflict between lightweight and strength: To ensure structural strength, traditional designs generally use solid castings, which results in bulky equipment and high installation and maintenance costs; Low reliability of the cooling system: The external cooling device is easily clogged by environmental dust and cannot guarantee basic heat exchange function when the servo motor fails; Poor maintenance convenience: Filter replacement requires shutdown and disassembly, and the air outlet is difficult to clean, affecting the equipment's ability to continue operating. Summary of the Invention

[0003] The purpose of the present invention is to solve the following technical bottlenecks of traditional butterfly valve actuators in the prior art: insufficient high temperature resistance: conventional metal structures are prone to sealing failure due to thermal expansion in high temperature fluid environments, and continuous high temperatures will accelerate the aging of driving components such as motors; contradiction between lightweight and strength: in order to ensure structural strength, traditional designs generally use solid castings, which makes the equipment bulky and has high installation and maintenance costs; low reliability of the heat dissipation system: the external heat dissipation device is easily clogged by environmental dust, and the basic heat exchange function cannot be guaranteed when the servo motor fails; poor maintenance convenience: the filter replacement requires shutdown and disassembly, and the air outlet is difficult to clean, which affects the equipment's ability to continue operating. A high-temperature resistant and lightweight butterfly valve actuator is proposed.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A high-temperature resistant lightweight butterfly valve actuator comprises two connecting pipes and a valve body. The outer walls of the two connecting pipes are fixedly sleeved with connecting flanges. The valve body is located between the two connecting pipes. The two connecting pipes and the valve body have a common annular cavity formed therein. A plurality of connecting bolts are threadedly passed through the two connecting flanges. The outer walls of the connecting bolts are threadedly sleeved with fixing nuts. The top of the valve body is fixedly connected to a sealing cylinder. The top of the sealing cylinder is fixedly connected to a supporting circular plate. The top of the supporting circular plate is fixedly connected to an actuator box. The inner wall of the bottom of the valve body is rotatably connected to a fixed sleeve rod. The interior of the fixed sleeve rod is fixedly penetrated by the valve stem. A drive assembly is provided inside the actuator box. A sealing top plate is fixed to the top of the execution box by installing screws, a mounting circular hole is provided on the top of the sealing top plate, and a cooling component is arranged inside the mounting circular hole; a fixed annular plate is fixed to the top of the sealing top plate, air inlet holes are provided on both sides of the fixed annular plate, a fixed partition is fixed to the middle of the fixed annular plate, arc filters are slid through both sides of the fixed annular plate, and limit components are arranged on both sides of the top of the fixed partition; The airflow flows through the arc filter, the inside of the valve stem, the first cavity of the valve disc, the annular cavity and then returns to the execution box to realize forced convection heat exchange.

[0005] In one possible design, the drive assembly includes a U-shaped plate slidably connected to the interior of the actuator box, a servo motor is fixedly mounted on the inner wall of one side of the U-shaped plate, a worm is fixedly sleeved on the output shaft of the servo motor, a worm wheel is fixedly sleeved on the outer wall of the valve stem, and the worm wheel and the worm are meshed; When the U-shaped plate moves laterally, the worm is disengaged from the worm wheel and switches to manual drive mode.

[0006] In one possible design, the cooling assembly includes an air intake fan fixed inside the mounting circular hole; the bottom of the sealing top plate is fixedly connected to a hollow truncated cone, the bottom of the hollow truncated cone is fixedly connected to a connecting sleeve, and the connecting sleeve is sleeved on the outside of the valve stem; the valve stem is a hollow structure and has two rectangular holes on its outer wall; the outer wall of the fixed sleeve is fixedly connected to two hollow boxes, one side of the two hollow boxes is fixedly connected to the valve disc, and a first cavity is defined inside the valve disc, the first cavity is communicated with the hollow box; the hollow box is communicated with the rectangular hole; The air flow enters the interior of the valve stem through the connecting sleeve and enters the first cavity through the rectangular hole.

[0007] In one possible design, the limit assembly includes two fixed annular sleeves fixed to the top of the fixed partition, an arc-shaped hole is provided on one side of the fixed annular sleeve, and the two fixed annular sleeves rotate inside and penetrate the rotating shaft; one side of the rotating shaft is fixedly connected to two connecting rectangular plates, and one side of the connecting rectangular plates is fixedly connected to the rotating cover plate; the top of the fixed partition is rotatably connected to the rotating shaft, the top of the rotating shaft is fixedly connected to the limit horizontal bar, and one side of the limit horizontal bar is fixedly connected to the strip plate; The limit on the curved filter is released when the cover is turned over.

[0008] In one possible design, a strip groove is opened on one side of the U-shaped plate, and two connecting rods are slidably connected inside the strip groove. The top of the connecting rod is fixedly connected to the rack; the bottom of the rack is fixedly connected to the U-shaped limit block, and the inner wall of the bottom of the actuator box is fixedly connected to the fixed bar. The U-shaped limit block is slidably sleeved on the top of the fixed bar; the outer wall of the valve stem is fixedly sleeved with a spur gear; When the rack is pushed manually, the rack drives the spur gear to rotate the valve stem.

[0009] In a possible design, the bottom of the sealing top plate is fixedly connected to the sealing protrusion, and both sides of the bottom of the sealing protrusion are fixedly connected to the U-shaped pressure plates, and the U-shaped pressure plates cooperate with the U-shaped plate to limit position.

[0010] In a possible design, vertical slots are opened on both sides of the top of the execution box, air outlet filters are inserted into the vertical slots, air outlet holes are opened on both sides of the execution box, and the air outlet filters cover the air outlet holes.

[0011] In one possible design, the bottom of the rotating cover is fixedly connected to the arc-shaped semicircular plate, the two sides of the fixed partition are slidably connected to two sliding plates, a tension spring is provided between the sliding plates on the same side, and the bottom of the sliding plate is fixedly connected to the fan-shaped baffle; When the cover plate is turned over, the arc-shaped semicircular plate is separated from the sliding plate, and the two fan-shaped baffles are closed and blocked by the installation circular hole under the action of the tension spring.

[0012] In one possible design, the bottom of the valve stem extends into the annular cavity, and the bottom of the sealing cylinder is in communication with the annular cavity; After the airflow exchanges heat in the annular cavity, it returns to the actuator box through the gap between the sealing cylinder and the valve stem.

[0013] In the present application, when in use, the two connecting pipes are connected to each other through two connecting flanges, and the two connecting flanges are fixedly connected together by multiple connecting bolts and multiple fixing nuts, thereby realizing the circulation of the fluid. When it is necessary to control the opening and closing state of the valve disc, the servo motor can be started, and the worm driven by the output shaft of the servo motor rotates, the worm drives the worm gear to rotate, the worm gear drives the valve stem to rotate, the valve stem drives the fixed sleeve rod to rotate, and the fixed sleeve rod drives the valve disc to rotate, thereby changing the on-off state of the device; During normal use, by starting the air intake fan, the air intake fan filters the external air through two arc-shaped filters, and then enters the interior of the fixed annular plate, and sends air in through the exposed parts on both sides of the fixed partition. After the air is concentrated by the hollow cone and the connecting sleeve, it is sent in through the internal cavity of the valve stem, and is discharged through two hollow boxes and sent into the interior of the first cavity. It directly exchanges heat with the temperature of the internal fluid through the valve disc, and then enters the interior of the annular cavity from below, goes around a circle, and after heat exchange again, it is sent back to the interior of the execution box through the gap between the sealing cylinder and the supporting circular plate and the valve stem, and is filtered again through the air outlet filters on both sides and discharged. Not only the hollow setting of the execution box and the valve disc can achieve a lightweight effect, but also the high temperature resistance effect can be achieved through air circulation. When the cam is in a closed position, the two plates are moved back and forth, and the two plates are brought into contact with each other, and the two plates are brought into contact with each other, and the two plates are brought back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved back and forth, and the two plates are moved When the servo motor fails and cannot open and close the valve normally, multiple mounting screws can be unscrewed to release the braking state of the sealing top plate, and the sealing top plate and the sealing protrusion can be taken out as a whole. The sealing protrusion drives the U-shaped pressure plate below to move up, and the U-shaped pressure plate can release the braking state of the U-shaped plate. At the same time, the connecting sleeve, the hollow cone and the fixed annular plate above are lifted together, and the space on the top of the actuator box is completely exposed; At this time, the U-shaped plate can be moved laterally, and the U-shaped plate drives the connecting rods on both sides to move laterally, and the connecting rod drives the rack to move laterally, and the rack drives the U-shaped limit block below to move laterally, and the U-shaped limit block slides on the fixed bar, and the worm and the worm gear are disengaged. At the same time, the rack is engaged with the spur gear. At this time, the U-shaped limit block is separated from the fixed bar, and the rack can be moved laterally. The rack drives the connecting rod to move laterally, and the connecting rod drives the spur gear to rotate. The spur gear drives the valve stem to rotate. One end of the connecting rod slides inside the strip groove to prevent the connecting rod from falling off. The valve can be opened and closed manually. At this time, the air outlet filters on both sides can also be leaked out. The air outlet filters can be slid upward from the inside of the vertical slot and can be disassembled and replaced. It is easy to use.

[0014] Beneficial effects: The closed heat exchange system composed of double annular cavities and hollow valve stems reduces the valve disc temperature through forced air convection, thus extending the service life of the seal. The hollow cone and the connecting sleeve form a Venturi effect, which enhances the efficiency of cold air introduction. Combined with the annular cavity spiral flow channel design, the heat exchange area is increased.

[0015] The valve body and actuator box adopt a composite structure of aluminum alloy frame and engineering plastics, which reduces the overall weight, and at the same time ensures the pressure bearing capacity through annular reinforcement ribs.

[0016] Curved filter dual-station redundant design: when replacing the filter on one side, the fan-shaped baffle on the other side automatically closes and seals to ensure continuous heat exchange; Quick disassembly and assembly structure: The limit bar is linked with the rotating cover to achieve quick replacement of the filter on one side without tools.

[0017] When the servo motor fails, the worm gear and rack and pinion transmission are switched by the U-shaped plate translation; The rack limit mechanism integrates a dual-mode locking function to prevent transmission failure caused by misoperation.

[0018] The air outlet filter adopts a magnetic quick-release structure and is equipped with a double-layer HEPA filter element to improve filtration efficiency; The curved filter is equipped with a self-cleaning coating to reduce dust adhesion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a high-temperature resistant and lightweight butterfly valve actuator proposed by the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention from a second perspective; Figure 3 This is an exploded view of the fixed sleeve rod and valve disc in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of a valve body in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 5 This is a three-dimensional structural diagram of the actuator box and valve stem in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 6 This is a three-dimensional structural diagram of a fixed ring and a rotating cover plate in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 7 This is an exploded view of the fixed ring and the rotating cover plate in the high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 8 This is an exploded view of the sealing top plate and the fixed partition plate in the high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 9 This is a schematic diagram of the three-dimensional cross-sectional structure of the sealing top plate and the air intake fan in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 10 This is an exploded view of the air outlet filter and the actuator box in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention; Figure 11 This is an exploded view of the rack and U-shaped plate in a high-temperature resistant lightweight butterfly valve actuator proposed by the present invention.

[0020] In the figure: 1. actuator box; 2. connecting flange; 3. connecting pipe; 4. fixing nut; 5. connecting bolt; 6. fixing sleeve rod; 7. valve disc; 8. supporting circular plate; 9. air outlet filter; 10. valve stem; 11. first cavity; 12. hollow box; 13. sealing cylinder; 14. annular cavity; 15. rectangular hole; 16. sealing top plate; 17. fixed annular plate; 18. rotating shaft; 19. fixed annular sleeve; 20. limiting horizontal bar; 21. curved filter; 22. rotating cover; 23. curved semicircular plate; 24. connecting rectangular plate; 25. mounting screw; 26. Fixed partition; 27. Mounting circular hole; 28. Air inlet; 29. ​​Sealing protrusion; 30. Air inlet fan; 31. U-shaped pressure plate; 32. Fan-shaped baffle; 33. Strip plate; 34. Arc-shaped hole; 35. Rotating shaft; 36. Sliding plate; 37. Tension spring; 38. Hollow cone; 39. Connecting sleeve; 40. Air outlet; 41. Vertical groove; 42. U-shaped plate; 43. Rack; 44. Connecting rod; 45. Worm; 46. Worm gear; 47. Servo motor; 48. Strip groove; 49. Spur gear; 50. Fixing strip; 51. U-shaped limit block; 52. Valve body. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In one embodiment; Figure 1-11 , a high-temperature resistant and lightweight butterfly valve actuator, the specific implementation method is as follows: the outer walls of the two connecting pipes 3 are fixedly installed with connecting flanges 2, and the valve body 52 is located between the two connecting pipes 3, and a continuous annular cavity 14 is jointly opened inside the three. A plurality of connecting bolts 5 pass through the two connecting flanges 2 and are locked and fixed by fixing nuts 4 to form the connection basis of the fluid channel. The top of the valve body 52 is fixedly connected to the sealing cylinder 13, and the top of the sealing cylinder 13 is fixedly connected to the supporting circular plate 8, and the top of the supporting circular plate 8 is fixedly connected to the actuator box 1. The inner wall of the bottom of the valve body 52 is rotatably installed with a fixed sleeve rod 6, and the inside of the fixed sleeve rod 6 is fixed and passes through the hollow valve stem 10. A drive assembly is set inside the actuator box 1, which includes a sliding U-shaped plate 42, a servo motor 47 is fixed on the inner wall of one side of the U-shaped plate 42, the output shaft of the servo motor 47 is fixedly sleeved with a worm 45, and the outer wall of the valve stem 10 is fixedly sleeved with a worm gear 46, and the worm gear 46 and the worm gear 45 remain in a meshing state. When the servo motor 47 is started, the worm 45 drives the worm wheel 46 to rotate the valve stem 10, and the valve stem 10 drives the valve disc 7 to rotate through the fixed sleeve rod 6 to achieve pipeline on-off control.

[0023] The sealing top plate 16 is fixedly installed on the top of the execution box 1 by installing screws 25. A mounting circular hole 27 is provided on the top of the sealing top plate 16, and an air intake fan 30 is fixedly installed inside to form a cooling component. The bottom of the sealing top plate 16 is fixedly connected to a hollow cone 38, and the bottom of the hollow cone 38 is fixed to a connecting sleeve 39, which is sleeved on the outside of the valve stem 10. Two rectangular holes 15 are provided on the outer wall of the valve stem 10, and the outer wall of the fixed sleeve rod 6 is fixedly connected to two hollow boxes 12. One side of the hollow box 12 is fixedly connected to the valve flap 7 with a first cavity 11 provided inside. The first cavity 11 is connected to the hollow box 12, and the hollow box 12 is connected to the rectangular hole 15 of the valve stem 10. A fixed annular plate 17 is fixedly installed on the top of the sealing top plate 16, and air intake holes 28 are provided on both sides of the fixed annular plate 17. A fixed partition 26 is fixedly installed in the middle, and an arc-shaped filter 21 is slid through on both sides. When the air intake fan 30 is started, the external air is filtered by the arc filter 21, enters through the space on both sides of the fixed partition 26, and is concentratedly introduced into the internal cavity of the valve stem 10 through the hollow cone 38 and the connecting sleeve 39. The airflow enters the hollow box 12 through the rectangular hole 15 and flows into the first cavity 11 of the valve disc 7, directly exchanging heat with the high-temperature fluid. The bottom of the valve stem 10 extends to the inside of the annular cavity 14, and the bottom of the sealing cylinder 13 is connected to the annular cavity 14. The airflow that completes the first heat exchange enters the annular cavity 14 and flows around it for secondary heat exchange, and then returns to the execution box 1 through the gap between the sealing cylinder 13 and the valve stem 10. Vertical grooves 41 are opened on both sides of the top of the execution box 1, and the air outlet filter 9 is inserted into the vertical groove 41. Air outlet holes 40 are opened on both sides of the execution box 1. The air outlet filter 9 covers the air outlet hole 40. Finally, the airflow is filtered by the air outlet filter 9 and discharged. This air circulation path runs through the core high-temperature area of ​​the valve disc 7 and the main structure of the valve body 52, significantly reducing the temperature of key components through forced convection. At the same time, the cavity design of components such as the valve disc 7 and valve stem 10 greatly reduces the overall weight while ensuring strength.

[0024] A limiting assembly is provided at the top of the fixed partition 26: two fixed annular sleeves 19 are fixed to the top of the fixed partition 26, and an arc-shaped hole 34 is provided on one side of the fixed annular sleeve 19. The rotating shaft 18 rotates and passes through the fixed annular sleeve 19. One side of the rotating shaft 18 is fixedly connected to the two connecting rectangular plates 24, and one side of the connecting rectangular plates 24 is fixedly connected to the rotating cover 22. An arc-shaped semicircular plate 23 is fixed to the bottom of the rotating cover 22. A rotating shaft 35 is rotatably installed on the top of the fixed partition 26, and a limiting horizontal bar 20 is fixed on the top of the rotating shaft 35. A strip plate 33 is fixed on one side of the limiting horizontal bar 20. Two sliding plates 36 are slidably connected on both sides of the fixed partition 26. A tension spring 37 is provided between the sliding plates 36 on the same side, and a fan-shaped baffle 32 is fixed to the bottom of the sliding plate 36. When the arc-shaped filter 21 needs to be replaced, the limiting horizontal bar 20 is rotated to disengage it from the target rotating cover 22 and move it to the top of the other rotating cover 22 and lock it. Flip the target and rotate the cover plate 22, causing the connecting rectangular plate 24 to move along the arc-shaped hole 34, and the rotating shaft 18 to rotate within the fixed annular sleeve 19. The arc-shaped semicircular plate 23 is now free from the restraint of the sliding plate 36. The two sliding plates 36, under the tension of the tension spring 37, move toward each other, driving the fan-shaped baffle 32 to close and seal the mounting hole 27. The arc-shaped filter 21 can now be withdrawn vertically and removed for replacement or cleaning. The fan-shaped baffle 32 automatically closes the air duct to maintain basic heat dissipation, preventing maintenance downtime from affecting continuous operation of the equipment.

[0025] The present application can be used in the valve field, and can also be used in other fields applicable to the present application.

[0026] In another embodiment; Figure 1-11 A high-temperature resistant and lightweight butterfly valve actuator is used in the valve field. A sealing protrusion 29 is fixed at the bottom of the sealing top plate 16. U-shaped pressure plates 31 are fixed on both sides of the bottom of the sealing protrusion 29. The U-shaped pressure plates 31 cooperate with the U-shaped plate 42 to limit the position. A strip groove 48 is opened on one side of the U-shaped plate 42. Two connecting rods 44 are slidably connected inside the strip groove 48. A rack 43 is fixed on the top of the connecting rod 44, and a U-shaped limit block 51 is fixed at the bottom of the rack 43. A fixing bar 50 is fixed to the inner wall of the bottom of the actuator box 1, and the U-shaped limit block 51 is slidably mounted on the top of the fixing bar 50. A spur gear 49 is fixed to the outer wall of the valve stem 10. When the servo motor 47 fails, the mounting screw 25 is unscrewed and the sealing top plate 16 assembly is vertically removed. The sealing protrusion 29 drives the U-shaped pressure plate 31 to move upward to release the lock on the U-shaped plate 42. The U-shaped plate 42 is moved laterally to disengage the worm 45 from the worm gear 46, and the rack 43 is engaged with the spur gear 49. After the U-shaped stopper 51 slides along the fixed bar 50 to the disengaged position, the rack 43 is manually pushed to drive the spur gear 49 to rotate the valve stem 10, achieving emergency valve opening and closing. This operation simultaneously exposes the vertical slots 41 on both sides, allowing the air filter 9 to be directly slid upward for cleaning or replacement, ensuring that the cooling system remains reliable in emergency conditions.

[0027] However, as is well known to those skilled in the art, the working principle and wiring method of the servo motor 47 are commonplace, and are conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any selection according to their needs or convenience.

[0028] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A high temperature resistant lightweight butterfly valve actuator, characterized in that: include: Two connecting pipes (3) and a valve body (52), the outer walls of the two connecting pipes (3) are fixedly mounted with connecting flanges (2), the valve body (52) is located between the two connecting pipes (3), a communicating annular cavity (14) is provided inside the two connecting pipes (3) and the valve body (52), a plurality of connecting bolts (5) are passed through the two connecting flanges (2), the outer walls of the connecting bolts (5) are threadedly mounted with fixing nuts (4), the top of the valve body (52) is fixedly connected to a sealing cylinder (13), the top of the sealing cylinder (13) is fixedly connected to a supporting circular plate (8), the top of the supporting circular plate (8) is fixedly connected to an execution box (1), the inner wall of the bottom of the valve body (52) is rotatably connected to a fixed sleeve rod (6), the interior of the fixed sleeve rod (6) is fixedly passed through a valve stem (10), and a driving assembly is provided inside the execution box (1); The top of the execution box (1) is fixedly mounted with a sealing top plate (16) by a plurality of mounting screws (25), a mounting circular hole (27) is provided on the top of the sealing top plate (16), a cooling component is provided inside the mounting circular hole (27), a fixed annular plate (17) is fixedly mounted on the top of the sealing top plate (16), air inlet holes (28) are provided on both sides of the fixed annular plate (17), a fixed partition (26) is fixedly mounted in the middle of the fixed annular plate (17), arc-shaped filters (21) are slidably passed through both sides of the fixed annular plate (17), and limit components are provided on both sides of the top of the fixed partition (26); The airflow is filtered by the arc filter (21) and then enters the interior of the valve stem (10), flows to the first cavity (11) of the valve disc (7) for heat exchange, and then enters the annular cavity (14) for secondary heat exchange, and then returns to the execution box (1) through the gap between the inner wall of the sealing cylinder (13) and the outer wall of the valve stem (10) for discharge, thereby achieving forced convection heat dissipation and lightweighting.

2. The high-temperature resistant and lightweight butterfly valve actuator according to claim 1, characterized in that: The drive assembly includes a U-shaped plate (42) slidably connected to the inside of the execution box (1), a servo motor (47) is fixedly installed on the inner wall of one side of the U-shaped plate (42), a worm (45) is fixedly installed on the output shaft of the servo motor (47), and a worm wheel (46) is fixedly installed on the outer wall of the valve stem (10). The worm wheel (46) is engaged with the worm (45). When the U-shaped plate (42) moves laterally, the worm (45) disengages from the worm wheel (46) and switches to a manual drive mode.

3. The high temperature resistant lightweight butterfly valve actuator according to claim 1, characterized in that: The cooling component includes an air intake fan (30) fixedly mounted inside the mounting circular hole (27), a hollow cone (38) fixedly connected to the bottom of the sealing top plate (16), a connecting sleeve (39) fixedly mounted on the bottom of the hollow cone (38), the connecting sleeve (39) being sleeved on the outside of the valve stem (10), the valve stem (10) being a hollow structure and having two rectangular holes (15) formed on the outer wall, the outer wall of the fixed sleeve rod (6) being fixedly connected to two hollow boxes (12), one side of the two hollow boxes (12) being fixedly connected to the valve flap (7), a first cavity (11) being formed inside the valve flap (7), the first cavity (11) being communicated with the hollow box (12), the hollow box (12) being communicated with the rectangular hole (15), the air flow being introduced into the interior of the valve stem (10) through the connecting sleeve (39), and entering the first cavity (11) through the rectangular hole (15).

4. The high-temperature resistant and lightweight butterfly valve actuator according to claim 1, characterized in that: The limiting assembly comprises two fixed annular sleeves (19) fixedly mounted on the top of the fixed partition (26), an arc-shaped hole (34) is provided on one side of the fixed annular sleeves (19), a rotating shaft (18) is rotatably mounted inside the two fixed annular sleeves (19), one side of the rotating shaft (18) is fixedly connected to two connecting rectangular plates (24), one side of the connecting rectangular plates (24) is fixedly connected to the rotating cover (22), the top of the fixed partition (26) is rotatably connected to the rotating shaft (35), the top of the rotating shaft (35) is fixedly connected to the limiting horizontal bar (20), one side of the limiting horizontal bar (20) is fixedly connected to the strip plate (33), and when the rotating cover (22) is turned over, the limiting of the arc filter (21) is released.

5. The high temperature resistant lightweight butterfly valve actuator according to claim 2, characterized in that: A strip groove (48) is provided on one side of the U-shaped plate (42), and two connecting rods (44) are slidably connected inside the strip groove (48). The top of the connecting rod (44) is fixedly connected to the rack (43), and the bottom of the rack (43) is fixedly connected to the U-shaped limit block (51). The inner wall of the bottom of the execution box (1) is fixedly connected to the fixed bar (50), and the U-shaped limit block (51) is slidably sleeved on the top of the fixed bar (50). A spur gear (49) is fixedly installed on the outer wall of the valve stem (10). When the rack (43) is manually pushed, the rack (43) drives the spur gear (49) to drive the valve stem (10) to rotate, and the connecting rod (44) slides and limits in the strip groove (48).

6. The high temperature resistant lightweight butterfly valve actuator according to claim 1, characterized in that: The bottom of the sealing top plate (16) is fixedly connected to the sealing protrusion (29), and both sides of the bottom of the sealing protrusion (29) are fixedly connected to the U-shaped pressure plate (31), and the U-shaped pressure plate (31) cooperates with the U-shaped plate (42) to limit.

7. The high temperature resistant lightweight butterfly valve actuator according to any one of claims 1 to 3, characterized in that: Vertical slots (41) are provided on both sides of the top of the execution box (1), and air outlet filters (9) are inserted into the vertical slots (41). Air outlet holes (40) are provided on both sides of the execution box (1), and the air outlet filters (9) cover the air outlet holes (40).

8. The high temperature resistant lightweight butterfly valve actuator according to claim 4, characterized in that: The bottom of the rotating cover plate (22) is fixedly connected to the arc-shaped semicircular plate (23), and the two sides of the fixed partition plate (26) are slidably connected to the two sliding plates (36). A tension spring (37) is provided between the sliding plates (36) on the same side. The bottom of the sliding plate (36) is fixedly connected to the fan-shaped baffle (32). When the rotating cover plate (22) is turned over, the arc-shaped semicircular plate (23) is separated from the sliding plate (36), and the two fan-shaped baffles (32) are closed and blocked by the installation circular hole (27) under the action of the tension spring (37) to maintain air circulation.

9. The high temperature resistant lightweight butterfly valve actuator according to claim 3, characterized in that: The bottom of the valve stem (10) extends into the annular cavity (14), and the bottom of the sealing cylinder (13) is connected to the annular cavity (14). After the airflow exchanges heat in the annular cavity (14), it returns to the actuator box (1) through the gap between the inner wall of the sealing cylinder (13) and the outer wall of the valve stem (10).

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