High-temperature protection butterfly valve

Abstract

The invention discloses a high-temperature protection butterfly valve, belongs to the technical field of butterfly valves, and solves the problem that a sealing surface of a valve plate cannot be cleaned when a high-temperature butterfly valve allows a high-temperature fluid medium to circulate at present. Comprising a valve body, an upper valve seat, a lower valve seat, an upper rotating shaft, a lower rotating shaft and a valve plate, wherein the upper valve seat and the lower valve seat are fixedly connected to the top and the bottom of an outer ring of the valve body respectively and communicated with the interior of the valve body; the upper rotating shaft and the lower rotating shaft are rotationally connected into the upper valve seat and the lower valve seat respectively; an inner ring of the valve body is fixedly connected with an annular sliding seat, and an annular sliding cavity is formed between the annular sliding seat and the inner wall of the valve body. During application, the servo motor and the air pump are controlled through the control module, and high-temperature fluid is blocked or conducted through the butterfly valve. During blocking, the movable valve seat abuts against the valve plate, and sealing is ensured; during conduction, the valve plate rotates, the scraper cleans the sealing surface, particle attachment damage is avoided, and normal operation of the butterfly valve is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of butterfly valves, and in particular to a high-temperature protection butterfly valve. Background Art

[0002] The butterfly valve is a type of valve with a simple structure, convenient operation and wide application. It is mainly composed of valve body, butterfly plate, valve stem and sealing ring. The butterfly plate is installed in the center of the valve body and is opened and closed by the rotation of the valve stem. The working principle of the butterfly valve is to control the flow and cutoff of the fluid by the rotation of the butterfly plate. When the butterfly plate is completely perpendicular to the flow channel, the valve is in a closed state; when the butterfly plate is parallel to the flow channel, the valve is fully open. The butterfly valve has the characteristics of small size and light weight, and is very convenient to install and maintain. It can achieve good sealing performance at low pressure, especially suitable for large-diameter pipeline systems. The sealing form of the butterfly valve is diverse, including soft seal and hard seal. Soft-sealed butterfly valves usually use rubber sealing rings, which have better sealing performance and are suitable for water, air and other media; while hard-sealed butterfly valves use metal sealing surfaces, which can withstand higher temperatures and pressures and are suitable for steam, oil and other media. The butterfly valve has a wide range of applications and can be used in water supply and drainage, HVAC, chemical industry, food and other fields. In water supply and drainage systems, butterfly valves are often used to control the on and off of water flow and adjust flow; in the chemical industry, it can be used to transport corrosive media. In addition, butterfly valves have a long service life and can be kept in good working condition as long as they are maintained regularly.

[0003] At present, in the process of transporting high-temperature fluid medium, in the flue gas recovery system, the high-temperature butterfly valve is used to control the pressure of the regenerator and adjust the on-off and flow rate of the flue gas turbine inlet pipeline. Since the normal operating temperature of the system is as high as several hundred degrees Celsius, and the medium transported is the regenerated flue gas containing a large amount of catalyst particles, during the operation of the high-temperature butterfly valve, since the sealing surface of the valve plate is set directly in the direction of the flue gas flow, the catalyst particles in the flue gas are easily attached to the sealing surface of the valve plate. Under high temperature conditions, the material properties of the valve plate sealing surface will decrease, and the surface hardness will decrease, making it easier for the catalyst particles to embed in the sealing surface. The attached particles will destroy the sealing between the valve plate and the valve seat, causing the high-temperature butterfly valve to leak when closed. The attachment of particles will increase the friction between the valve plate and the valve seat, so that the high-temperature butterfly valve requires a larger operating torque during the opening and closing process, resulting in the valve not moving smoothly, and may even be stuck, affecting the pressure control of the system. In severe cases, the smoke machine cannot operate normally. However, there is currently no way to clean the sealing surface of the valve plate during the high-temperature butterfly valve for the circulation of high-temperature fluid medium.

[0004] Therefore, a high temperature protection butterfly valve is proposed to solve or alleviate the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high temperature protection butterfly valve.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The camming mechanism is a kind of high temperature protection butterfly valve, comprises a valve body, an upper valve seat and a lower valve seat respectively fixedly connected to the top and bottom of the outer ring of the valve body and communicated with the interior of the valve body, an upper rotating shaft and a lower rotating shaft respectively rotatably connected in the upper valve seat and the lower valve seat, and a valve plate fixedly connected between the upper rotating shaft and the lower rotating shaft and located in the valve body, the inner ring of the valve body is fixedly connected with an annular sliding seat, an annular sliding cavity is formed between the annular sliding seat and the inner wall of the valve body, a movable valve seat is slidably connected in the annular sliding cavity, which can move back and forth along the central axis direction of the valve body and can contact the valve plate, a driving mechanism coaxially arranged with the central axis of the valve plate is rotatably connected on the end surface of the valve plate, and a rotatable cleaning structure is arranged at both ends of the driving mechanism, when the valve plate closes the valve body, the driving mechanism is stationary and the cleaning structure is arranged away from the valve plate, when the valve plate releases the sealing of the valve body, the valve plate intermittently reciprocates 180° and the cleaning structure fits the outer ring of the valve plate, and the driving mechanism intermittently reciprocates and deflects.

[0007] Preferably, a driver is disposed at the upper end of the upper valve seat, the driver is transmission-connected to the upper rotating shaft, and the upper end of the upper rotating shaft penetrates the driver.

[0008] Preferably, the driving mechanism includes a connecting shaft rotatably connected to the valve plate, a connecting sleeve fixedly connected to the end of the connecting shaft, and two connecting rods centrally symmetrically arranged on the outer ring of the connecting sleeve, the cleaning structure is arranged at the end of the connecting rod away from the connecting sleeve, a accommodating cavity is provided on the valve plate, the end of the connecting shaft away from the connecting sleeve passes through the valve plate into the accommodating cavity, the end of the connecting shaft located in the accommodating cavity is fixedly connected with a detection gear, an upper channel connected to the accommodating cavity is provided at the upper end of the upper rotating shaft, a jumping rod is slidably connected in the upper channel, the lower end of the jumping rod is fixedly connected with a cone meshing with the tooth groove in the detection gear, and also includes an electronic control system, the electronic control system includes a displacement sensor fixedly connected to the top of the driver and located above the upper end of the jumping rod, a data processing module coupled to the displacement sensor, and a control module coupled to the data processing module, the control module is coupled to the driver.

[0009] Preferably, the driver includes a casing fixedly connected to the upper end of the upper valve seat, a driven bevel gear fixedly connected to the outer ring of the upper rotating shaft and located in the casing, a servo motor fixedly connected to the casing, and a driving bevel gear, the rotor shaft of the servo motor passes through the casing, and the driving bevel gear is fixedly connected to the rotor shaft of the servo motor, and the driving bevel gear is meshed with the driven bevel gear, and the servo motor is coupled to the control module.

[0010] Preferably, the cleaning structure includes a mounting head fixedly connected to an end of the connecting rod away from the connecting sleeve, a scraper, and a transmission shaft, a side wall of the mounting head is provided with an exhaust hole, the exhaust hole is connected to an air sliding cavity located in the mounting head, a piston is slidably connected in the air sliding cavity, an end of the piston away from the exhaust hole is fixedly connected to a rack, a mounting shaft is rotatably connected to the inner wall of the air sliding cavity, a transmission gear and a first bevel gear are coaxially fixedly connected to the mounting shaft, the rack is meshed with the transmission bevel gear, a transmission shaft that can penetrate the mounting head to the air sliding cavity and is rotatably arranged is fixedly connected to the scraper, a second bevel gear is fixedly connected to the transmission shaft, and the The second bevel gear is meshed and connected with the first bevel gear, and an extension air duct is provided in the connecting rod and is connected with the exhaust hole and passes through two ends of the connecting rod. A connecting air hole connected with the extension air duct is provided on the connecting sleeve, and an air duct is provided in the connecting shaft. An outer ring of the connecting shaft is provided with an air outlet hole connected with the connecting air hole, and a plurality of air inlet holes connected with the accommodating chamber. A lower air duct is provided in the lower rotating shaft, and the lower end of the lower air duct passes through the lower end of the lower rotating shaft, and the upper end of the lower air duct is connected with the accommodating chamber. The lower end of the lower rotating shaft is fixedly connected with a rotating pipe joint connected with the lower air duct, and the rotating pipe joint is connected with a first air pump coupled to the control module through a first air pipe.

[0011] Preferably, the air pressure in the annular sliding cavity is adjustable. When the valve plate closes the valve body, the air pressure in the annular sliding cavity increases and guides the movable valve seat to move and contact the valve plate. When the valve plate releases the sealing of the valve body, the air pressure in the annular sliding cavity decreases and guides the movable valve seat to move into the annular sliding cavity.

[0012] Preferably, the outer ring of the valve body is provided with a plurality of external air holes connected with the annular sliding cavity, the outer ring of the valve body is fixedly connected with a connecting air pipe connected with the external air holes, the plurality of connecting air pipes are connected with a main air pipe, and the main air pipe is connected with a second air pump coupled with the control module through a second air pipe.

[0013] Preferably, the data processing module includes a processor, and the control module includes a controller.

[0014] The present invention has the following beneficial effects: When the present invention is actually applied, if it is necessary to make the butterfly valve block the high-temperature fluid, the servo motor can be controlled by the control module, and the servo motor drives the upper rotating shaft and the valve plate to seal the valve body. At the same time, the control module can also control the second air pump to increase the air pressure in the annular sliding cavity, so that the movable valve seat can be displaced and contact with the valve plate, thereby ensuring the sealing effect of the valve plate when closing the valve body; If the butterfly valve no longer blocks the high-temperature fluid, but allows the high-temperature fluid to be transported smoothly in the valve body, the control module is used to control the second air pump to adjust the air pressure in the annular sliding cavity so that the movable valve seat can be displaced toward the annular sliding cavity. As the movable valve seat moves away from the valve plate, the rotation of the valve plate will not be hindered by the movable valve seat. At this time, since the sealing surface of the valve plate is facing the openings at both ends of the valve body, the sealing surface on one side will inevitably face the feeding direction of the high-temperature fluid. At this time, the high-temperature fluid will impact the connecting rod and the mounting head, thereby causing the connecting sleeve to deflect on the valve plate through the connecting shaft, keeping one of the two connecting rods set downward and the other set upward. After a period of time, the control module will control the servo The servo motor drives the valve plate to rotate 180°, so that the driving mechanism and the cleaning structure can move from the left side of the valve plate to the right side along with the valve plate. At this time, the control module controls the first air pump to inflate the driving mechanism and the cleaning structure, so that the scraper can be deflected until the scraper fits the sealing surface of the valve plate. When the high-temperature fluid impacts the connecting rod and the mounting head, the connecting rod at the upper end and the connecting rod at the lower end can be deflected. The connecting rod originally at the upper end will go to the lowest end, and vice versa, the connecting rod originally at the lower end will go to the highest end. In this process, the scraper will scrape off the solid medium particles attached to the sealing surface of the valve plate, thereby avoiding damage to the valve plate, the movable valve seat, and the valve body seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 for Figure 1 The enlarged view of point B in the middle; Figure 4 for Figure 1 Enlarged view of point C in the middle; Figure 5 It is a structural block diagram of the electronic control system in the present invention.

[0017] 1. Valve body; 2. Upper valve seat; 3. Lower valve seat; 4. Lower rotating shaft; 5. Lower airway; 6. Rotating pipe joint; 7. Valve plate; 8. Upper rotating shaft; 9. Upper channel; 10. Accommodating chamber; 11. Jumping rod; 12. Cone; 13. Detection gear; 14. Connecting shaft; 15. Airway; 16. Air inlet; 17. Air outlet; 18. Connecting sleeve; 19. Connecting air hole; 20. Connecting rod; 21. Extended airway; 22. Mounting head; 23. Exhaust hole; 24. Air slide cavity; 25, piston; 26, rack; 27, mounting shaft; 28, transmission gear; 29, first bevel gear; 30, second bevel gear; 31, transmission shaft; 32, scraper; 33, annular sliding cavity; 34, external air hole; 35, connecting air pipe; 36, movable valve seat; 37, driven bevel gear; 38, displacement sensor; 39, data processing module; 40, control module; 41, servo motor; 42, first air pump; 43, second air pump; 44, annular slide. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the invention is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] A high temperature protection butterfly valve, such as Figure 1 He Ru Figure 5 As shown, it includes a valve body 1, an upper valve seat 2 and a lower valve seat 3 respectively fixedly connected to the top and bottom of the outer ring of the valve body 1 and communicated with the inside of the valve body 1, an upper rotating shaft 8 and a lower rotating shaft 4 respectively rotatably connected in the upper valve seat 2 and the lower valve seat 3, and a valve plate 7 fixedly connected between the upper rotating shaft 8 and the lower rotating shaft 4 and located in the valve body 1, the inner ring of the valve body 1 is fixedly connected with an annular sliding seat 44, an annular sliding cavity 33 is formed between the annular sliding seat 44 and the inner wall of the valve body 1, and a A movable valve seat 36 can be reciprocated and displaced along the central axis of the valve body 1 and can contact the valve plate 7. A driving mechanism coaxially arranged with the central axis of the valve plate 7 is rotatably connected to the end surface of the valve plate 7. Rotatable cleaning structures are arranged at both ends of the driving mechanism. When the valve plate 7 closes the valve body 1, the driving mechanism is stationary and the cleaning structure is arranged away from the valve plate 7. When the valve plate 7 releases the sealing of the valve body 1, the valve plate 7 intermittently reciprocates 180° and the cleaning structure fits the outer ring of the valve plate 7, and the driving mechanism intermittently reciprocates.

[0025] It also includes an electronic control system, which includes a displacement sensor 38 fixedly connected to the top of the driver and located above the upper end of the jumping rod 11, a data processing module 39 coupled to the displacement sensor 38, and a control module 40 coupled to the data processing module 39, the control module 40 is coupled to the driver, the data processing module 39 includes a processor, and the control module 40 includes a controller.

[0026] In the practical application of the present invention, the butterfly valve can block the high-temperature fluid through the control of the control module 40. When the fluid needs to be blocked, the control module 40 first sends a command to the driver, and the driver then drives the upper shaft 8 and the valve plate 7 to rotate, so that the valve plate 7 quickly enters the pre-sealed position inside the valve body 1. At this time, the valve plate 7 has initially achieved the blocking of the fluid, but in order to ensure the sealing effect, the control module 40 further starts the second air pump 43 to inject gas into the annular sliding cavity 33 to increase its internal air pressure. As the air pressure increases, the movable valve seat 36 moves under the action of the air pressure and tightly contacts the valve plate 7 to form a sealing structure. This process not only ensures the sealing between the valve plate 7 and the valve seat, but also effectively blocks the passage of the high-temperature fluid medium, so that the valve plate 7, the movable valve seat 36 and the valve body 1 together constitute a reliable sealing system. During the entire operation process, the sealing performance is always in the best state and is not prone to leakage problems, thereby providing a solid foundation for the reliable blocking of high-temperature fluids.

[0027] When the butterfly valve switches from blocking the high-temperature fluid to allowing the high-temperature fluid to flow smoothly in the valve body 1, the control module 40 will perform the following operations: First, the control module 40 sends a command to the second air pump 43 to adjust the air pressure in the annular sliding cavity 33. As the air pressure changes, the air pressure becomes smaller, and the movable valve seat 36 gradually moves into the annular sliding cavity 33 and separates from the valve plate 7. This action eliminates the restriction of the movable valve seat 36 on the rotation of the valve plate 7, allowing the valve plate 7 to rotate freely. During the rotation process, the valve plate 7 will eventually reach a specific position, that is, the sealing surface of the valve plate 7 is opposite to the two end openings of the valve body 1. At this time, the sealing surface on one side of the valve plate 7 will directly face the feed direction of the high-temperature fluid.

[0028] When the high-temperature fluid passes through the valve body 1, it will impact the connecting rod 20 and the mounting head 22. This impact force will cause the connecting sleeve 18 to deflect on the valve plate 7 through the connecting shaft 14, thereby keeping the two connecting rods 20 in a balanced state: one connecting rod 20 deflects downward to the lowest end, and the other deflects upward to the highest end. This deflection state not only adapts to the impact of the fluid, but also prepares for subsequent operations.

[0029] After a period of time, the control module 40 will start the servo motor 41 to drive the valve plate 7 to rotate 180°. This rotation action causes the driving mechanism and the cleaning structure to move from the left side of the valve plate 7 to the right side. At the same time, the control module 40 will also control the first air pump 42 to inflate the driving mechanism and the cleaning structure. After inflation, the scraper 32 will be deflected under the action of air pressure until it is tightly fitted against the sealing surface of the valve plate 7.

[0030] When the high-temperature fluid continues to impact the connecting rod 20 and the mounting head 22, the connecting rod 20 will undergo further dynamic changes: the connecting rod 20 originally located at the upper end will move to the lower end, and the connecting rod 20 originally located at the lower end will move up to the uppermost end. In this process, the scraper 32 will scrape off the solid medium particles attached to the sealing surface of the valve plate 7 as the connecting rod 20 moves. This scraping action can effectively clean the sealing surface and prevent solid particles from accumulating on the sealing surface, thereby avoiding damage caused by particle adhesion when the valve plate 7, the movable valve seat 36 and the valve body 1 are sealed, ensuring that the butterfly valve always maintains good sealing performance and operating status during the transportation of high-temperature fluids.

[0031] Preferably, if Figure 1 As shown, a driver is provided at the upper end of the upper valve seat 2, and the driver is transmission-connected to the upper rotating shaft 8, and the upper end of the upper rotating shaft 8 passes through the driver setting, and the driver includes a casing fixedly connected to the upper end of the upper valve seat 2, a driven bevel gear 37 fixedly connected to the outer ring of the upper rotating shaft 8 and located in the casing, a servo motor 41 fixedly connected to the casing, and a driving bevel gear, the rotor shaft of the servo motor 41 passes through the casing, and the driving bevel gear is fixedly connected to the rotor shaft of the servo motor 41, and the driving bevel gear is meshed with the driven bevel gear 37, and the servo motor 41 is coupled to the control module 40.

[0032] When the driver needs to be controlled by the control module 40 to drive the upper rotating shaft 8 and the valve plate 7 to rotate, it is mainly the servo motor 41 that is controlled by the control module 40, and then the servo motor 41 drives the active bevel gear to drive the driven bevel gear 37 meshing with it to rotate, so that the upper rotating shaft 8 with the driven bevel gear 37 can rotate smoothly in the upper valve seat 2.

[0033] Preferably, if Figure 2 As shown, the driving mechanism includes a connecting shaft 14 rotatably connected to the valve plate 7, a connecting sleeve 18 fixedly connected to the end of the connecting shaft 14, and two connecting rods 20 centrally symmetrically arranged on the outer ring of the connecting sleeve 18, the cleaning structure is arranged at the end of the connecting rod 20 away from the connecting sleeve 18, the valve plate 7 is provided with a accommodating cavity 10, the end of the connecting shaft 14 away from the connecting sleeve 18 passes through the valve plate 7 to the accommodating cavity 10, the end of the connecting shaft 14 located in the accommodating cavity 10 is fixedly connected with a detection gear 13, the upper end of the upper rotating shaft 8 is provided with an upper channel 9 connected to the accommodating cavity 10, a jumping rod 11 is slidably connected in the upper channel 9, and the lower end of the jumping rod 11 is fixedly connected with a cone 12 meshing with the tooth groove in the detection gear 13.

[0034] When the driving mechanism needs to drive the cleaning structure to deflect, the cleaning structure mainly follows the connecting rod 20 to deflect. The connecting rod 20 rotates on the valve body 1 through the connecting sleeve 18 and the connecting shaft 14. In the process of rotation of the driving mechanism, the detection gear 13 on the connecting shaft 14 will also rotate synchronously. Normally, the teeth of the detection gear 13 are evenly distributed. The cone 12 meshing in the teeth of the detection gear 13 will evenly drive the jumping rod 11 to jump up and down. Then, when the displacement signal detected by the displacement sensor 38 is fed back to the data processing module 39, the displacement signal obtained by the data processing module 39 should also be regular. However, if there is a seal attached to the sealing surface of the valve plate 7, When solid particles cause the deflection of the driving mechanism to be hindered, it means that during the period when the butterfly valve is opened, solid particles have begun to accumulate on the sealing surface of the valve plate 7. Then the displacement signal obtained by the data processing module 39 is no longer regular, and the data processing module 39 can count how long it takes for solid particles to accumulate on the sealing surface on one side. After this time is reached, it is necessary to control the servo motor 41 through the control module 40 to drive the valve plate 7 to complete a 180° rotation. This can not only complete the removal of solid particles accumulated on the sealing surface on one side, but also enable the sealing surfaces on both sides to work, thereby extending the service life of the valve plate 7.

[0035] Preferably, if Figure 3 As shown, the cleaning structure includes a mounting head 22 fixedly connected to the end of the connecting rod 20 away from the connecting sleeve 18, a scraper 32, and a transmission shaft 31. An exhaust hole 23 is opened on the side wall of the mounting head 22. The exhaust hole 23 is connected to an air sliding cavity 24 located in the mounting head 22. A piston 25 is slidably connected in the air sliding cavity 24. A rack 26 is fixedly connected to the end of the piston 25 away from the exhaust hole 23. A mounting shaft 27 is rotatably connected to the inner wall of the air sliding cavity 24. A transmission gear 28 and a first bevel gear 29 are coaxially fixedly connected to the mounting shaft 27. The rack 26 is meshed with the transmission bevel gear. A transmission shaft 31 that can penetrate the mounting head 22 to the air sliding cavity 24 and is rotatably arranged is fixedly connected to the scraper 32. The transmission shaft 31 is fixedly connected to the second bevel gear 30. The second bevel gear 30 is meshedly connected with the first bevel gear 29, an extension air duct 21 connected with the exhaust hole 23 and passing through both ends of the connecting rod 20 is opened in the connecting rod 20, a connecting air hole 19 connected with the extension air duct 21 is opened on the connecting sleeve 18, an air duct 15 is opened in the connecting shaft 14, an air outlet hole 17 connected with the connecting air hole 19 and a plurality of air inlet holes 16 connected with the accommodating chamber 10 are opened on the outer ring of the connecting shaft 14, a lower air duct 5 is opened in the lower rotating shaft 4, the lower end of the lower air duct 5 passes through the lower end of the lower rotating shaft 4, the upper end of the lower air duct 5 is connected with the accommodating chamber 10, the lower end of the lower rotating shaft 4 is fixedly connected with a rotating pipe joint 6 connected with the lower air duct 5, and the rotating pipe joint 6 is connected with a first air pump 42 coupled to the control module 40 through a first air pipe.

[0036] When the cleaning structure needs to work, it is necessary to control the first air pump 42 to perform the inflation work through the control module 40. The gas passes through the first air pipe, the rotating pipe joint 6, the lower air duct 5, and the accommodating chamber 10 in this order, and enters the air duct 15 of the connecting shaft 14 through the air inlet 16, and then enters the tail gas hole 23 of the mounting head 22 through the air outlet 17, the connecting air hole, and the extension air duct 21 in this order, and then increases the air pressure in the air sliding chamber 24, so that the piston 25 is displaced. When the piston 25 is displaced, it will drive the rack 26 to move together, and the rack 26 drives the transmission gear 28 meshing therewith to rotate, and the transmission gear 28 is coaxial with the mounting shaft 27 and the first bevel gear 29 coaxially connected thereto to rotate. In this way, the first bevel gear 29 can drive and drive the second bevel gear 30 to rotate, and the second bevel gear 30 drives the scraper 32 to deflect at an angle through the transmission shaft 31, so that the scraper 32 can fit on the sealing surface of the valve plate 7, thereby starting to clean the accumulation of solid particles.

[0037] Preferably, if Figure 4 As shown, the air pressure in the annular sliding cavity 33 is adjustable. When the valve plate 7 closes the valve body 1, the air pressure in the annular sliding cavity 33 increases and guides the movable valve seat 36 to move and contact the valve plate 7. When the valve plate 7 releases the valve body 1, the air pressure in the annular sliding cavity 33 is reduced and guides the movable valve seat 36 to move into the annular sliding cavity 33. The outer ring of the valve body 1 is provided with a plurality of external air holes 34 connected to the annular sliding cavity 33. The outer ring of the valve body 1 is fixedly connected with a connecting air pipe 35 connected to the external air holes 34. The plurality of connecting air pipes 35 are connected to a main air pipe together. The main air pipe is connected to a second air pump 43 coupled to the control module 40 through a second air pipe.

[0038] If the air pressure in the annular sliding cavity 33 needs to be adjusted, the control module 40 controls the second air pump 43 to inflate and exhaust air. When inflating, the air pressure in the annular sliding cavity 33 increases, thereby enabling the movable valve seat 36 to move outward. Conversely, when exhausting air, the air pressure in the annular sliding cavity 33 is small, and under the influence of the air pressure, the movable valve seat 36 moves into the annular sliding cavity 33.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high temperature protection butterfly valve, characterized in that: The valve body (1) comprises an upper valve seat (2) and a lower valve seat (3) respectively fixedly connected to the top and bottom of the outer ring of the valve body (1) and communicated with the interior of the valve body (1), an upper rotating shaft (8) and a lower rotating shaft (4) respectively rotatably connected to the interior of the upper valve seat (2) and the interior of the lower valve seat (3), and a valve plate (7) fixedly connected between the upper rotating shaft (8) and the lower rotating shaft (4) and located in the valve body (1), wherein the inner ring of the valve body (1) is fixedly connected to an annular sliding seat (44), an annular sliding cavity (33) is formed between the annular sliding seat (44) and the inner wall of the valve body (1), and a sliding groove (33) is formed in the annular sliding cavity (33). A movable valve seat (36) is connected which can be reciprocated and moved along the central axis of the valve body (1) and can contact the valve plate (7). A driving mechanism which is coaxially arranged with the central axis of the valve plate (7) is rotatably connected to the end surface of the valve plate (7). Rotatable cleaning structures are arranged at both ends of the driving mechanism. When the valve plate (7) closes the valve body (1), the driving mechanism is stationary and the cleaning structure is arranged away from the valve plate (7). When the valve plate (7) releases the sealing of the valve body (1), the valve plate (7) intermittently reciprocates 180 degrees and the cleaning structure fits the outer ring of the valve plate (7), and the driving mechanism intermittently reciprocates.

2. A high temperature protection butterfly valve according to claim 1, characterized in that: A driver is arranged at the upper end of the upper valve seat (2), the driver is in transmission connection with the upper rotating shaft (8), and the upper end of the upper rotating shaft (8) passes through the driver.

3. A high temperature protection butterfly valve according to claim 2, characterized in that: The driving mechanism comprises a connecting shaft (14) rotatably connected to the valve plate (7), a connecting sleeve (18) fixedly connected to the end of the connecting shaft (14), and two connecting rods (20) centrally symmetrically arranged on the outer ring of the connecting sleeve (18); the cleaning structure is arranged at one end of the connecting rod (20) away from the connecting sleeve (18); a receiving cavity (10) is provided on the valve plate (7); one end of the connecting shaft (14) away from the connecting sleeve (18) passes through the valve plate (7) to the receiving cavity (10); one end of the connecting shaft (14) located in the receiving cavity (10) is fixedly connected to a detection gear (13); the upper rotating shaft (14) is provided with a detection gear (13) fixedly connected to the detection gear (13); and the cleaning structure is arranged at one end of the connecting rod (20) away from the connecting sleeve (18). An upper channel (9) communicating with the accommodating chamber (10) is provided at the upper end of the shaft (8); a jumping rod (11) is slidably connected in the upper channel (9); a cone (12) meshing with a tooth groove in a detection gear (13) is fixedly connected at the lower end of the jumping rod (11); and an electric control system is also included. The electric control system includes a displacement sensor (38) fixedly connected to the top of the driver and located above the upper end of the jumping rod (11); a data processing module (39) coupled to the displacement sensor (38); and a control module (40) coupled to the data processing module (39); and the control module (40) is coupled to the driver.

4. A high temperature protection butterfly valve according to claim 3, characterized in that: The driver comprises a casing fixedly connected to the upper end of the upper valve seat (2), a driven bevel gear (37) fixedly connected to the outer ring of the upper rotating shaft (8) and located in the casing, a servo motor (41) fixedly connected to the casing, and a driving bevel gear, wherein the rotor shaft of the servo motor (41) passes through the casing, the driving bevel gear is fixedly connected to the rotor shaft of the servo motor (41), the driving bevel gear is meshedly connected to the driven bevel gear (37), and the servo motor (41) is coupled to a control module (40).

5. A high temperature protection butterfly valve according to claim 4, characterized in that: The cleaning structure comprises a mounting head (22) fixedly connected to an end of the connecting rod (20) away from the connecting sleeve (18), a scraper (32), and a transmission shaft (31); an exhaust hole (23) is provided on a side wall of the mounting head (22); the exhaust hole (23) is connected to an air sliding cavity (24) located in the mounting head (22); a piston (25) is slidably connected to the air sliding cavity (24); and an end of the piston (25) away from the exhaust hole (23) is fixedly connected to a rack. (26), a mounting shaft (27) is rotatably connected to the inner wall of the air sliding cavity (24), a transmission gear (28) and a first bevel gear (29) are coaxially fixedly connected to the mounting shaft (27), the rack (26) is meshingly connected to the transmission bevel gear, a transmission shaft (31) that can penetrate the mounting head (22) and is rotatably arranged in the air sliding cavity (24) is fixedly connected to the scraper (32), a second bevel gear (30) is fixedly connected to the transmission shaft (31), the The second bevel gear (30) is meshedly connected with the first bevel gear (29); the connecting rod (20) is provided with an extension air passage (21) which is connected to the exhaust hole (23) and passes through both ends of the connecting rod (20); the connecting sleeve (18) is provided with a connecting air hole (19) which is connected to the extension air passage (21); the connecting shaft (14) is provided with an air passage (15); the outer ring of the connecting shaft (14) is provided with an air outlet hole (17) which is connected to the connecting air hole (19); and the connecting sleeve (18) is provided with a connecting air hole (19) which is connected to the extension air passage (21). A plurality of air inlet holes (16) are connected to the accommodating chamber (10); a lower air duct (5) is provided in the lower rotating shaft (4); the lower end of the lower air duct (5) passes through the lower end of the lower rotating shaft (4); the upper end of the lower air duct (5) is connected to the accommodating chamber (10); the lower end of the lower rotating shaft (4) is fixedly connected to a rotating pipe joint (6) connected to the lower air duct (5); the rotating pipe joint (6) is connected to a first air pump (42) coupled to the control module (40) through a first air pipe.

6. A high temperature protection butterfly valve according to claim 3, characterized in that: The air pressure in the annular sliding cavity (33) is adjustable. When the valve plate (7) closes the valve body (1), the air pressure in the annular sliding cavity (33) increases and guides the movable valve seat (36) to move and contact the valve plate (7). When the valve plate (7) releases the sealing of the valve body (1), the air pressure in the annular sliding cavity (33) decreases and guides the movable valve seat (36) to move into the annular sliding cavity (33).

7. A high temperature protection butterfly valve according to claim 6, characterized in that: The outer ring of the valve body (1) is provided with a plurality of external air holes (34) in communication with the annular sliding cavity (33); the outer ring of the valve body (1) is fixedly connected with a connecting air pipe (35) in communication with the external air holes (34); the plurality of connecting air pipes (35) are connected together with a main air pipe; the main air pipe is connected to a second air pump (43) coupled to the control module (40) via a second air pipe.

8. A high temperature protection butterfly valve according to claim 3, characterized in that: The data processing module (39) includes a processor, and the control module (40) includes a controller.

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