Modularized high-temperature butterfly valve

Abstract

The invention relates to the technical field of valves, and discloses a modular high-temperature butterfly valve which comprises a valve body and a valve seat arranged on the inner wall of the valve body, an adjusting bin is fixedly connected to the top of the valve body, a butterfly plate is rotationally connected to the middle of the valve body, and a worm gear shaft fixedly connected with the butterfly plate is rotationally connected into the adjusting bin; the right portion of the adjusting bin is rotationally connected with a hand wheel worm meshed with the worm gear shaft, core pipes are clamped to the left side and the right side of the inner wall of the valve body in a sliding and sealing mode, and first slopes are arranged at the inner ends of the core pipes. When the valve is closed, the abutting pipes on the two sides drive the end face sealing rings to extrude and limit the edge of the butterfly valve, so that sealing is enhanced, the deformation effect of pressure on the edge of the butterfly plate is reduced, the service life of the butterfly plate is prolonged, and before the valve is opened, the core pipes on the two sides and the abutting pipes move outwards to avoid positions and are matched with each other at the inner ends to form slopes. In addition, adjustment and maintenance of any opening degree of the valve can be achieved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and specifically to a modular high-temperature butterfly valve. Background Technology

[0002] Butterfly valves are among the simplest types of common valves. Also known as flap valves, they control the flow and interruption of liquid flow by changing the rotation angle of a butterfly plate. The overall structure of a butterfly valve can be disassembled into multiple modules, facilitating individual design, manufacturing, and maintenance. The butterfly valve structure provides bidirectional sealing; even when fully open, the relatively small thickness of the butterfly plate does not affect liquid flow. Therefore, butterfly valves are widely used in general industrial fields such as petroleum, chemical, gas, and water treatment, and can also be used in cooling water systems of thermal power plants.

[0003] Chinese patent application CN118309802A discloses a high-temperature wear-resistant butterfly valve. It includes a valve seat, a rotating ball sealed and rotatably connected to the center of the valve seat, a channel in the center of the rotating ball, and a seal made of wear-resistant material fixed to the inner wall of the channel. A first connecting shaft is rotatably connected to one side of the rotating ball, and a second connecting shaft is rotatably connected to the other side. The first connecting shaft passes through the first connecting shaft and the two are rotatably connected. A butterfly plate, which seals against the seal, is fixed between the opposite ends of the second connecting shaft and the first connecting shaft. A support frame and a limiting plate pass through and are fixed to the first connecting shaft. A driving mechanism is provided between the valve seat and the second connecting shaft.

[0004] In the high-temperature wear-resistant butterfly valve described in the aforementioned patent, the butterfly plate is located inside the rotating ball. By adjusting the rotation angle of the rotating ball, the port of the rotating ball is misaligned with the valve passage to reduce the impact force of high-pressure liquid on the butterfly plate and prevent sudden increases in liquid pressure from impacting the butterfly plate, which could cause deformation and reduce sealing performance. However, the rotation of the rotating ball is driven by an elastic diaphragm located in the flow channel. Since the pressure is instantaneous, the rotating ball cannot protect the butterfly plate in advance. Furthermore, when the pipeline pressure fluctuates subsequently, the rotating ball also cannot protect the butterfly plate in advance, resulting in low protection effect for the butterfly plate. In addition, the concentrated stress value at the edge of the butterfly plate is high, making it more prone to deformation and resulting in a short service life. When adjusting the deflection of the butterfly plate, locking the butterfly plate relies on fixed-position teeth and limiting through holes, making it difficult to achieve arbitrary opening adjustment of the valve. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of poor protection of the butterfly plate and inability to adjust the valve opening degree arbitrarily in general high-temperature butterfly valves during use. This invention provides a modular high-temperature butterfly valve.

[0006] To achieve the above objectives, the present invention specifically adopts the following technical solution: A modular high-temperature butterfly valve includes a valve body and a valve seat disposed on the inner wall of the valve body. An adjustment chamber is fixedly connected to the top of the valve body, a butterfly plate is rotatably connected to the middle of the valve body, a worm gear shaft fixedly connected to the butterfly plate is rotatably connected to the adjustment chamber, and a handwheel worm gear meshing with the worm gear shaft is rotatably connected to the right side of the adjustment chamber. Core tubes are slidably sealed and snapped onto both sides of the inner wall of the valve body. An inclined surface is provided at the inner end of the core tube. A stop tube is slidably sealed and connected between the inner wall of the core tube and the valve body. An end face sealing ring is fixedly connected to the inner end of the stop tube, and an inclined surface is provided at the outer end. The cross section of the end face sealing ring is wedge-shaped with an inclined surface three in its natural state. An adjustment component is provided between the valve body and the worm gear shaft to drive the core tubes and the stop tubes on both sides to move outwards respectively. The handwheel worm gear is rotatably connected to a handle at its front edge, and a pressure cap is slidably engaged at the front end of the handle. A limiting component for locking the handwheel worm gear at any angle is provided on the front side of the adjustment chamber.

[0007] Furthermore, a sealing ring one is movably engaged with the outer wall and inner wall of the inner end of the core tube, a sealing ring two is movably engaged with the outer wall of the outer end of the abutment tube, and the abutment tube is slidably engaged with the inner wall of the core tube.

[0008] Furthermore, the outer wall of the core tube is provided with guide grooves on the upper and lower sides of the circumference. The guide grooves are composed of inclined grooves and annular grooves connected together in the inward direction of the valve body. The outer wall of the abutment tube is provided with guide grooves on the upper and lower sides of the circumference. The guide grooves are inclined in the inward direction of the valve body. The vertical distance between the left and right ends of the guide grooves is greater than the vertical distance between the left and right ends of the guide grooves. The guide grooves are connected to the inclined grooves inside and out.

[0009] Furthermore, the adjusting assembly includes an adjusting ring rotatably connected to the outer wall of the valve body. The inner wall of the adjusting ring is fixedly connected with pins that are movably engaged with guide groove one and guide groove two, respectively. A handwheel screw is rotatably connected to the top of the worm gear shaft. A threaded tube that movably passes through the worm gear shaft and the butterfly plate is threaded onto the bottom of the handwheel screw. A sleeve is provided on the lower wall of the valve body. An elastic shaft ring that is rotatably connected to the bottom of the threaded tube is slidably engaged inside the sleeve. A hinge rod is movably connected between the elastic shaft ring and the adjusting ring. A limiting plate that is slidably engaged with the side wall of the worm gear shaft is provided on the right wall of the threaded tube.

[0010] Furthermore, the bottom of the regulating chamber has a tubular surround that is movably sleeved around the worm gear shaft. The inner wall of the tubular surround is provided with sealing packing. Movable grooves are respectively opened on the upper and lower sides of the middle part of the regulating ring. Sliding grooves corresponding to the pin are opened on the upper and lower walls of the valve body. A sealing cover with a central outward protrusion is installed around the valve body. The sealing cover is sealed and sleeved around the tubular surround at the bottom of the regulating chamber and the outside of the lower wall sleeve of the valve body.

[0011] Furthermore, a limiting post is fixedly connected to the lower wall of the inner cavity of the regulating chamber, and the toothed portion at the top of the worm gear shaft is provided with an arc groove that is movably engaged with the limiting post, and the central angle corresponding to the arc groove is ninety degrees.

[0012] Furthermore, a limiting block is provided on the lower wall of the regulating chamber, and a fan cavity is provided on the right side of the limiting block, which is tubularly enclosed by the bottom of the regulating chamber. A rectangular groove adapted to the limiting plate is provided on the top of the fan cavity, and the width of the limiting plate is adapted to the width of the fan cavity.

[0013] Furthermore, the limiting component includes a worm gear tube rotatably connected to the front end of the adjusting chamber, the worm gear tube being sleeved on the handwheel worm, and a plurality of limiting holes being opened around the outer circumference of the worm gear tube. A fine-tuning worm gear meshing with the worm gear tube is rotatably connected to the right wall of the adjusting chamber.

[0014] Furthermore, the limiting assembly also includes a wedge pin rotatably connected to the rear end of the pressure cap, and a spring pin slidably connected to the inner wall of the front part of the handwheel worm gear and movably engaged with the limiting hole. The bottom of the spring pin is provided with a wedge groove, and the wedge pin and the wedge groove are respectively provided with mutually abutting inclined surfaces. The wedge pin is slidably engaged with the inner wall of the handwheel worm gear.

[0015] The beneficial effects of the present invention are as follows: 1. When the valve is closed, the abutment tubes on both sides drive the end face sealing rings to squeeze and limit the edge of the butterfly valve, thereby strengthening the seal in conjunction with the valve seat. When the medium pressure increases, it reduces the deformation effect of the pressure on the edge of the butterfly plate. Compared with the butterfly plate protection mechanism in a general butterfly valve that operates with the medium pressure, it can automatically protect the butterfly plate after the valve is closed, thereby extending the service life of the butterfly plate. Before the valve is opened, the control and adjustment component drives the core tubes and abutment tubes on both sides to move outward to avoid being in a different position. The inclined surface one at the inner end of the core tube is aligned with the inclined surface three on the end face sealing ring after deformation recovery, and then cooperates with the inclined surface two at the outer end of the abutment tube, thereby optimizing the flow channel shape, reducing local resistance and energy loss, and thus reducing the impact on the medium transportation.

[0016] 2. When the valve is opened, pressing the cap unlocks the handwheel worm gear. The handle controls the handwheel worm gear to drive the worm gear shaft, causing the butterfly plate to deflect. With the help of the control and adjustment limit component, the handwheel worm gear can be locked at any angle after the cap is released, thereby achieving the adjustment and maintenance of any opening degree of the valve. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the butterfly valve of the present invention; Figure 2 This is a three-dimensional sectional view of the butterfly valve body and regulating chamber of the present invention; Figure 3 This is a three-dimensional sectional view of the butterfly valve and regulating ring of the present invention; Figure 4This is a three-dimensional sectional view of the butterfly valve body and the abutment portion of the present invention; Figure 5 This is a three-dimensional sectional view of the butterfly valve and the butt pipe portion of the present invention; Figure 6 This is a three-dimensional exploded cross-sectional view of the butterfly valve core tube and the butt tube portion of the present invention; Figure 7 This is a three-dimensional sectional view of the butterfly valve limiting block and regulating chamber of the present invention; Figure 8 This is a three-dimensional sectional view of the butterfly valve regulating chamber and the handwheel worm gear portion of the present invention; Figure 9 This is a three-dimensional cross-sectional view of the sealing ring portion of the butterfly valve in the open state of the present invention.

[0018] Reference numerals: 1. Valve body; 11. Sealing cover; 12. Limiting block; 13. Adjusting chamber; 14. Limiting post; 2. Butterfly plate; 21. Worm gear shaft; 22. Arc groove; 3. Core tube; 31. Sealing ring one; 32. Guide groove one; 33. Abutment tube; 34. Sealing ring two; 35. End face sealing ring; 36. Guide groove two; 37. Adjusting ring; 38. Pin; 4. Handwheel screw; 41. Screw; 42. Elastic shaft ring; 43. Hinge rod; 44. Limiting plate; 5. Handwheel worm gear; 51. Handle; 52. Pressure cap; 53. Wedge post; 54. Worm gear tube; 55. Limiting hole; 56. Fine-tuning worm gear; 57. Elastic post; 58. Wedge groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1, as Figures 1-9 As shown, a modular high-temperature butterfly valve includes a valve body 1 and a valve seat disposed on the inner wall of the valve body 1. An adjustment chamber 13 is fixedly connected to the top of the valve body 1. A butterfly plate 2 is rotatably connected to the middle of the valve body 1. A worm gear shaft 21 fixedly connected to the butterfly plate 2 is rotatably connected to the adjustment chamber 13. A handwheel worm 5 meshing with the worm gear shaft 21 is rotatably connected to the right side of the adjustment chamber 13. Core tubes 3 are slidably sealed and snapped onto the left and right sides of the inner wall of the valve body 1. A slope is provided at the inner end of the core tube 3. A stop tube 33 is slidably sealed and snapped onto the inner wall of the core tube 3. An end face sealing ring 35 is fixedly connected to the inner end of the stop tube 33, and a slope is provided at the outer end. The cross section of the end face sealing ring 35 is wedge-shaped with a slope three in its natural state. An adjustment component is provided between the valve body 1 and the worm gear shaft 21 to drive the core tubes 3 and the stop tubes 33 on both sides to move outwards respectively. The front edge of the handwheel worm gear 5 is rotatably connected to a handle 51, and the front end of the handle 51 is slidably engaged with a pressure cap 52. A limit component for locking the handwheel worm gear 5 at any angle is provided on the front side of the adjustment chamber 13.

[0021] Initially, the valve is closed, with the butterfly plate 2 sealing against the valve seat. The abutment tubes 33 on both sides drive the end face sealing rings 35 to squeeze and limit the edge of the butterfly plate 2. This reduces the deformation effect of the pressure on the edge of the butterfly plate 2 when the medium pressure increases. Compared with the protection mechanism of the butterfly plate 2 in a general butterfly valve, which operates with the medium pressure, this mechanism can always protect the butterfly plate 2 in the later stage of valve closure, avoiding protection of the butterfly plate 2 when the medium pressure increases, thus extending the service life of the butterfly plate 2. When it is necessary to control the valve to open, the control adjustment component drives the core tubes 3 and abutment tubes 33 on both sides to move outward respectively, and the outward movement distance of the abutment tubes 33 is controlled to be greater than the outward movement distance of the core tubes 3. After the end face sealing rings 35 move away from the butterfly plate 2, they automatically deform and return to a wedge shape. The inclined surface of the inner end of the core tube 3 and the deformed end face sealing rings 35 are then engaged. The three inclined surfaces on 5 are aligned and then aligned with the second inclined surface at the outer end of the abutment tube 33, thereby optimizing the flow path when the valve is opened. When the medium passes through the two ends of the core tube 3 and the abutment tube 33, the local resistance and energy loss of the medium are reduced, thereby reducing the impact on the medium delivery. After the core tube 3 and the abutment tube 33 are positioned, the pressure cap 52 is pressed to unlock the handwheel worm gear 5. The handwheel worm gear 5 drives the worm gear shaft 21 to deflect the butterfly plate 2, thereby adjusting the valve opening. With the control adjustment limit component, the handwheel worm gear 5 can be locked at any angle after the pressure cap 52 is released, thereby achieving the adjustment and maintenance of any valve opening. When the valve is closed, the handwheel worm gear 5 is used to adjust the butterfly plate 2 smoothly, which can reduce the pressure impact of the medium on the butterfly plate 2 when the valve is closed and reduce the pressure deformation effect on the butterfly plate 2.

[0022] In Example 2, based on the above example, the outer wall of the core tube 3 is provided with guide groove 1 32 on the upper and lower sides of the outer circumference. The guide groove 1 32 is composed of a combination of inclined groove and annular groove connected inward along the valve body 1. The outer wall of the abutment tube 33 is provided with guide groove 2 36 on the upper and lower sides of the outer circumference. The guide groove 2 36 is inclined inward along the valve body 1. The vertical distance between the left and right ends of the guide groove 2 36 is greater than the vertical distance between the left and right ends of the guide groove 1 32. The guide groove 2 36 is connected to the inclined groove inside and out.

[0023] The adjustment assembly includes an adjustment ring 37 rotatably connected to the outer wall of the valve body 1. The inner wall of the adjustment ring 37 is fixedly connected to a pin 38 that is movably engaged with guide groove 1 32 and guide groove 2 36 respectively. A handwheel screw 4 is rotatably connected to the top of the worm gear shaft 21. A threaded tube 41 that movably passes through the worm gear shaft 21 and the butterfly plate 2 is threaded onto the bottom of the handwheel screw 4. A sleeve is provided on the lower wall of the valve body 1. A spring shaft ring 42 that is rotatably connected to the bottom of the threaded tube 41 is slidably engaged inside the sleeve. A hinge rod 43 is movably connected between the spring shaft ring 42 and the adjustment ring 37. A limiting plate 44 that is slidably engaged with the side wall of the worm gear shaft 21 is provided on the right wall of the threaded tube 41.

[0024] Initially, the valve is closed. By rotating the handwheel screw 4, the solenoid 41 is driven to move the elastic ring 42 downward. The elastic ring 42 then pulls the hinge rod 43, causing the adjusting ring 37 to deflect. The adjusting ring 37 uses the pin 38 to press the inclined groove and the second guide groove 36 respectively, thereby driving the core tube 3 and the abutment tube 33 on both sides to move outward synchronously. Subsequently, when the pin 38 rotates along the ring groove, the core tube 3 stops moving, while the pin 38 continues to press the second guide groove 36, driving the abutment tube 33 to move outward slightly. This causes the core tube 3 and the abutment tube 33 to move away from the butterfly plate 2, facilitating the subsequent opening of the butterfly plate 2. It also causes the end face sealing ring 35 to combine with the inner end of the core tube 3 to form a slope, optimizing the flow channel shape, reducing the local resistance and energy loss of the medium, thereby reducing the impact on the transport of the medium. Subsequently, when the worm gear shaft 21 is controlled to deflect the butterfly plate 2, since the solenoid 41 can rotate relative to the elastic ring 42, it does not affect the separation of the core tube 3 and the abutment tube 33.

[0025] Furthermore, when the valve is closed, the elastic ring 42 is in a compressed state. When the pressure fluctuation of the pipeline medium and the vibration of the working conditions cause the handwheel screw 4 to tend to drive the solenoid 41 downward, the elasticity of the elastic ring 42 can generate a reaction force to ensure that the handwheel screw 4 is difficult to deflect automatically.

[0026] In embodiment three, based on the above embodiments, the bottom of the regulating chamber 13 has a tubular surround that is movably sleeved around the worm gear shaft 21. The inner wall of the tubular surround is provided with sealing packing. The upper and lower sides of the regulating ring 37 are respectively provided with movable grooves. The upper and lower walls of the valve body 1 are provided with sliding grooves corresponding to the pin 38. A sealing cover 11 with a central outward protrusion is installed around the valve body 1. The sealing cover 11 is sealed and sleeved around the tubular surround at the bottom of the regulating chamber 13 and the outside of the lower wall sleeve of the valve body 1.

[0027] The inner end of the core tube 3 is movably connected to the outer wall and the inner wall with a sealing ring 31, and the outer end of the abutment tube 33 is movably connected to the outer wall with a sealing ring 34.

[0028] By setting sealing ring 31 and sealing ring 34, sufficient seal can be formed before and after the core tube 3 and the abutment tube 33 move, preventing the medium from leaking between the core tube 3 and the abutment tube 33, as well as from leaking outward from the groove. In conjunction with the sealing cover 11, external sealing is performed, thereby fully preventing medium leakage.

[0029] In Example 4, based on the above examples, a limiting post 14 is fixedly connected to the lower wall of the inner cavity of the regulating chamber 13, and an arc groove 22 is provided on the top toothed part of the worm gear shaft 21 to be movably engaged with the limiting post 14. The central angle corresponding to the arc groove 22 is ninety degrees.

[0030] The maximum rotation range of the butterfly plate 2 driven by the worm gear shaft 21 is limited by the cooperation between the arc groove 22 and the limiting post 14.

[0031] In Example 5, based on the above examples, a limiting block 12 is provided on the lower wall of the regulating chamber 13. A fan cavity is provided on the right side of the limiting block 12, which is tubularly surrounded by the bottom of the regulating chamber 13. A rectangular groove adapted to the limiting plate 44 is provided on the top of the fan cavity. The width of the limiting plate 44 is adapted to the width of the fan cavity.

[0032] The initial limiting block 12 is engaged in the rectangular groove. Before the core tubes 3 and abutment tubes 33 on both sides are adjusted away from the butterfly plate 2, the butterfly plate 2 cannot be deflected by the handwheel worm gear 5. This avoids the core tubes 3 and abutment tubes 33 from not moving away from the butterfly plate 2 in time when the valve is opened, thus preventing them from interfering with each other. After the core tubes 3 and abutment tubes 33 on both sides are adjusted away from the butterfly plate 2 to the maximum distance, the screw tube 41 just drives the limiting plate 44 to move down into the fan cavity. At that time, the worm gear shaft 21 can be adjusted to drive the butterfly plate 2 to deflect. The corresponding limiting plate 44 can deflect and move in the fan cavity. When closing the valve, it is also necessary to adjust in sequence to ensure that the core tubes 3 and abutment tubes 33 squeeze and limit the edge of the butterfly plate 2, making the adjustment safe and reliable.

[0033] In Example 6, based on the above examples, the limiting component includes a worm gear tube 54 rotatably connected to the front end of the adjusting chamber 13. The worm gear tube 54 is sleeved on the handwheel worm 5. Several limiting holes 55 are opened on the outer circumference of the worm gear tube 54. A fine-tuning worm 56 that meshes with the worm gear tube 54 is rotatably connected to the right wall of the adjusting chamber 13.

[0034] The limiting assembly also includes a wedge 53 rotatably connected to the rear end of the pressure cap 52, and a spring column 57 slidably connected to the inner wall of the front part of the handwheel worm gear 5, which is movably engaged with the limiting hole 55. A wedge groove 58 is provided at the bottom of the spring column 57, and there are inclined surfaces that abut against each other between the wedge 53 and the wedge groove 58. The wedge 53 is slidably engaged with the inner wall of the handwheel worm gear 5.

[0035] By pressing the cap 52, the wedge 53 is driven to squeeze the wedge groove 58, thereby causing the elastic column 57 to disengage from the limiting hole 55. The handle 51 is then controlled to rotate the handwheel worm gear 5, thus adjusting the deflection of the butterfly plate 2. During this process, the handle 51 rotates for easy gripping. After releasing the cap 52, the elastic column 57 automatically resets. This, combined with rotating the fine-tuning worm gear 56, prevents the fine-tuning worm gear 56 from rotating when the elastic column 57 is just inserted into the limiting hole 55. When the elastic column 57 is misaligned with the limiting hole 55... When in position, the fine-tuning worm 56 can rotate, and when it rotates to the limit hole 55 and engages with the elastic column 57, the elastic column 57 automatically engages with the limit hole 55, thereby locking the handwheel worm 5 at any angle, ensuring the adjustment and maintenance of any valve opening. In addition, by using the mutual restriction between the elastic column 57 and the limit hole 55, the handwheel worm 5 and the fine-tuning worm 56 can be locked in both directions, avoiding accidental deflection of the two due to pipeline medium pressure fluctuations and operating vibrations.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular high-temperature butterfly valve, comprising a valve body (1) and a valve seat disposed on the inner wall of the valve body (1), characterized in that, The valve body (1) is fixedly connected to the top of the regulating chamber (13), the valve body (1) is rotatably connected to the middle of the valve body (1), the regulating chamber (13) is rotatably connected to the worm gear shaft (21) fixedly connected to the worm gear shaft (21), the right side of the regulating chamber (13) is rotatably connected to the handwheel worm gear (5) meshing with the worm gear shaft (21), the valve body (1) is slidably sealed and clamped to the left and right sides of the inner wall of the valve body (1), the inner end of the core tube (3) is provided with a first inclined surface, the inner wall of the core tube (3) and the valve body (1) are slidably sealed and connected to a stop tube (33), the inner end of the stop tube (33) is fixedly connected to an end face sealing ring (35), and the outer end is provided with a second inclined surface, the end face sealing ring (35) in its natural state has a wedge-shaped cross section with a third inclined surface, and an regulating component is provided between the valve body (1) and the worm gear shaft (21) to drive the two sides of the core tube (3) and the stop tube (33) to move outwards respectively; The handwheel worm (5) is rotatably connected to a handle (51) at its front end edge. A pressure cap (52) is slidably engaged at the front end of the handle (51). A limiting component for locking the handwheel worm (5) at any angle is provided on the front side of the adjustment chamber (13).

2. The modular high-temperature butterfly valve according to claim 1, characterized in that, The outer wall of the inner end of the core tube (3) is movably engaged with the inner wall and the outer wall of the core tube (3), and the outer wall of the outer end of the abutment tube (33) is movably engaged with the second sealing ring (34). The abutment tube (33) is slidably engaged with the inner wall of the core tube (3).

3. A modular high-temperature butterfly valve according to claim 2, characterized in that, The outer wall of the core tube (3) is provided with guide groove 1 (32) on the upper and lower sides respectively. The guide groove 1 (32) is composed of inclined groove and annular groove connected together in the direction of inward along the valve body (1). The outer wall of the abutment tube (33) is provided with guide groove 2 (36) on the upper and lower sides respectively. The guide groove 2 (36) is inclined in the direction of inward along the valve body (1). The vertical distance between the left and right ends of the guide groove 2 (36) is greater than the vertical distance between the left and right ends of the guide groove 1 (32). The guide groove 2 (36) is connected to the inclined groove inside and out.

4. A modular high-temperature butterfly valve according to claim 3, characterized in that, The adjustment assembly includes an adjustment ring (37) rotatably connected to the outer wall of the valve body (1). The inner wall of the adjustment ring (37) is fixedly connected with a pin (38) that is movably engaged with guide groove one (32) and guide groove two (36). The top of the worm gear shaft (21) is rotatably connected with a handwheel screw (4). The bottom of the handwheel screw (4) is threaded with a threaded tube (41) that movably passes through the worm gear shaft (21) and the butterfly plate (2). The lower wall of the valve body (1) is provided with a sleeve. The sleeve is slidably engaged with a spring shaft ring (42) that is rotatably connected to the bottom of the threaded tube (41). A hinge rod (43) is movably connected between the spring shaft ring (42) and the adjustment ring (37). The right wall of the threaded tube (41) is provided with a limiting plate (44) that is slidably engaged with the side wall of the worm gear shaft (21).

5. A modular high-temperature butterfly valve according to claim 4, characterized in that, The bottom of the regulating chamber (13) has a tubular surround that is movably sleeved around the worm gear shaft (21). The inner wall of the tubular surround is provided with sealing packing. The regulating ring (37) has movable grooves on the upper and lower sides of the middle. The upper and lower walls of the valve body (1) are provided with sliding grooves corresponding to the pin (38). The valve body (1) is equipped with a sealing cover (11) that protrudes outward in the middle. The sealing cover (11) is sealed around the tubular surround at the bottom of the regulating chamber (13) and the outside of the lower wall sleeve of the valve body (1).

6. A modular high-temperature butterfly valve according to claim 5, characterized in that, The lower wall of the inner cavity of the regulating chamber (13) is fixedly connected to a limiting post (14), and the top toothed part of the worm gear shaft (21) is provided with an arc groove (22) that is movably engaged with the limiting post (14). The central angle corresponding to the arc groove (22) is ninety degrees.

7. A modular high-temperature butterfly valve according to claim 6, characterized in that, The lower wall of the regulating chamber (13) is provided with a limiting block (12). The right side of the limiting block (12) is provided with a fan cavity that extends through the bottom of the regulating chamber (13) and is surrounded by a tubular structure. The top of the fan cavity is provided with a rectangular groove that matches the limiting plate (44). The width of the limiting plate (44) matches the width of the fan cavity.

8. A modular high-temperature butterfly valve according to claim 7, characterized in that, The limiting component includes a worm gear tube (54) rotatably connected to the front end of the adjusting chamber (13). The worm gear tube (54) is sleeved on the handwheel worm (5). Several limiting holes (55) are opened on the outer circumference of the worm gear tube (54). A fine-tuning worm (56) that meshes with the worm gear tube (54) is rotatably connected to the right wall of the adjusting chamber (13).

9. A modular high-temperature butterfly valve according to claim 8, characterized in that, The limiting assembly also includes a wedge (53) rotatably connected to the rear end of the pressure cap (52). The inner wall of the front part of the handwheel worm (5) is slidably connected to a spring column (57) that is movably engaged with the limiting hole (55). A wedge groove (58) is provided at the bottom of the spring column (57). The wedge column (53) and the wedge groove (58) have mutually abutting inclined surfaces. The wedge column (53) is slidably engaged with the inner wall of the handwheel worm (5).

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