A butterfly valve with easy adjustment

Abstract

The present application relates to butterfly valve technical field, specifically disclose a kind of butterfly valve of being convenient for adjustment, comprising: valve seat, the inner wall of the valve seat is fixedly connected with sealing ring, the valve seat is rotatably connected with rotating tube one and rotating tube two, rotating tube one and the rotating tube two between fixedly connected with valve plate, the valve plate with the sealing ring abuts;Spherical shell, embedded in the middle of the valve plate, the spherical shell is rotatably connected with spherical valve core, rotating tube one and rotating tube two are rotatably connected with rotating rod one and rotating rod two respectively, rotating rod one and rotating rod two are all fixedly connected with the spherical valve core and pass through the valve plate. By controlling the rotation number of worm, the stepless adjustment of valve plate angle can be realized, which overcomes the technical defects that the traditional limit disc gear groove is discrete distributed, so that the valve plate can only be locked at several fixed inclination angles, and the flow is conveniently fine adjusted.

Description

Technical Field

[0001] This invention relates to the field of butterfly valve technology, and more specifically, to a butterfly valve that is easy to adjust. Background Technology

[0002] A butterfly valve is a shut-off valve that controls the flow of media in a pipeline by rotating a valve plate. Due to its simple structure, small size, light weight, convenient operation, and low cost, it has been widely used in pipeline systems in many industrial fields such as petroleum, chemical, metallurgy, hydropower, and municipal water supply. Butterfly valves can be used as both shut-off valves and regulating valves to adjust and control the flow rate of media in pipelines.

[0003] Existing butterfly valves rely on the rotation of the valve plate to change the flow cross-sectional area and regulate the flow rate. The valve plate angle is locked by engaging the limit handle with the spaced grooves on the limit disc. Because the grooves are discretely distributed, the valve plate can only remain at a few fixed angles corresponding to the grooves, and cannot be locked at any continuous angle. This makes it difficult for operators to precisely adjust the valve plate to the ideal opening degree. When fine flow rate adjustment is required, it cannot meet the accuracy requirements and is extremely inconvenient to use.

[0004] In view of this, the present invention proposes a butterfly valve that is easy to adjust. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides an easily adjustable butterfly valve to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a butterfly valve that is easy to adjust, comprising: a valve seat, a sealing ring fixedly connected to the inner wall of the valve seat, a rotating tube one and a rotating tube two rotatably connected to the valve seat, a valve plate fixedly connected between the rotating tube one and the rotating tube two, and the valve plate abutting against the sealing ring; A spherical shell is embedded in the middle of the valve plate. A spherical valve core is rotatably connected inside the spherical shell. Rotating rod one and rotating rod two are rotatably connected inside rotating tube one and rotating tube two, respectively. Rotating rod one and rotating rod two both pass through the valve plate and are fixedly connected to the spherical valve core. An adjustment structure is provided on the valve seat, and the adjustment structure is used to adjust the opening and closing angle of the valve plate and the ball valve core.

[0007] Furthermore, the adjustment structure includes: A connector is fixedly connected to the first rotating tube, and the first rotating rod passes through the connector and the two are rotatably connected. A fixing component is rotatably connected to the connecting component. The valve seat is fixedly connected to a limiting disc, and the fixing component is fixedly connected to a limiting handle. The limiting disc limits the limiting handle.

[0008] Furthermore, the connector is fixedly connected to a worm gear, the fixing member is rotatably connected to a worm, the worm and the worm gear mesh, and the worm is fixedly connected to a rotating wheel.

[0009] Furthermore, the fixing member is fixedly connected with a stop bar, the worm wheel has an arc-shaped groove, the stop bar is located in the arc-shaped groove of the worm wheel, and the stop bar limits the movement of the worm wheel.

[0010] Furthermore, the worm gear is fixedly connected to a pointer, and the fixing member is provided with a scale indicator line.

[0011] Furthermore, the connecting piece is fixedly connected to the second limiting disc, the first rotating rod is fixedly connected to the second limiting handle, and the second limiting disc limits the second limiting handle.

[0012] Furthermore, it also includes a limiting component, which is disposed on the valve seat and limits the rotation tube two and the rotation rod two. The limiting component includes: Friction wheel one is fixedly connected to the rotating tube two, and friction wheel two is fixedly connected to the rotating rod two; A fixed plate is fixedly connected to the valve seat, and the rotating tube passes through the fixed plate.

[0013] Furthermore, the fixing plate is fixedly connected to two fixing columns, and the fixing columns are rotatably connected to two limiting members, one end of which abuts against the outer ring surface of the first friction wheel and the second friction wheel, respectively.

[0014] Furthermore, the fixed plate is fixedly connected to a support plate, the support plate is threadedly connected to a threaded rod, the threaded rod is rotatably connected to a rotating component, the rotating component and the limiting component are hinged together by a hinge, and the threaded rod is fixedly connected to a rotating wheel.

[0015] Furthermore, the limiting components on both sides are arranged in a figure-eight pattern.

[0016] Compared with the prior art, the present invention provides a butterfly valve that is easy to adjust, and has the following beneficial effects: This invention utilizes a rotating wheel to drive a worm gear. Since the limiting handle and limiting disc re-engage, the relative positions of the worm gear and the fixing component remain unchanged. The worm gear drives the worm wheel to rotate, which in turn drives the connecting component and rotating rod to rotate synchronously. The worm wheel also drives a pointer to rotate, allowing the operator to read the scale on the fixing component to determine the valve plate's rotation angle. By controlling the number of rotations of the worm gear, stepless adjustment of the valve plate angle can be achieved. This overcomes the technical defect of traditional limiting discs with discrete tooth groove distribution, which limits the valve plate to only a few fixed angles, facilitating precise flow rate adjustment.

[0017] When the valve plate cannot meet the fine adjustment requirements, the present invention allows for the pressing of the limit handle two, which stops the limit plate two from limiting the limit handle two. Rotating the limit handle two causes the rotating rod one to rotate, which in turn causes the spherical valve core to rotate within the spherical shell. The spherical valve core then causes the rotating rod two to rotate within the rotating tube two. In cases where the valve plate cannot meet the fine flow adjustment requirements, the spherical valve core is used to achieve fine compensation adjustment of the flow rate, thereby expanding the flow adjustment range and accuracy of the butterfly valve.

[0018] This invention uses limiting components to limit and fix friction wheel one and friction wheel two, thereby improving the stability of the valve plate and the spherical valve core, and preventing accidental contact with limiting handle one and limiting handle two, which could cause the valve plate and the spherical valve core to rotate and change the flow rate of the medium in the pipeline. This effectively ensures the stability of the flow rate of the medium in the pipeline and the safety of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a butterfly valve that is easy to adjust according to the present invention; Figure 2 This is a schematic diagram of the valve plate and spherical shell in this invention; Figure 3 This is a cross-sectional view of the valve plate and spherical shell in this invention. Figure 4 This is a schematic diagram of the structure of the limiting disk and the limiting handle in this invention; Figure 5 This is a schematic diagram of the structure of the connector and the fastener in this invention; Figure 6 This is a schematic diagram of the structure of the friction wheel 2 and the limiting member in this invention; Figure 7 This is a cross-sectional view of friction wheel one and friction wheel two in this invention; Figure 8 This is a schematic diagram of the structure of the fixing column and the limiting component in this invention; Figure 9 This is a schematic diagram of the rotating component and the hinge component in this invention.

[0020] In the diagram: 1. Valve seat; 2. Sealing ring; 3. Rotating tube one; 4. Rotating tube two; 5. Valve plate; 6. Spherical shell; 7. Spherical valve core; 8. Rotating rod one; 9. Rotating rod two; 10. Connecting part; 11. Fixing part; 12. Limiting disc one; 13. Limiting handle one; 14. Worm gear; 15. Worm; 16. Rotating wheel one; 17. Stop bar; 18. Pointer; 19. Limiting disc two; 20. Limiting handle two; 21. Friction wheel one; 22. Friction wheel two; 23. Fixing plate; 24. Fixing column; 25. Limiting part; 26. Support plate; 27. Threaded rod; 28. Rotating part; 29. ​​Hinge part; 30. Rotating wheel two. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0024] This invention provides a butterfly valve that is easy to adjust, such as... Figures 1-5 As shown, it includes: valve seat 1, sealing ring 2, rotating tube one 3, rotating tube two 4, valve plate 5, spherical shell 6, spherical valve core 7, rotating rod one 8, rotating rod two 9, connecting piece 10, fixing piece 11, limiting plate one 12, limiting handle one 13, worm gear 14, worm 15, rotating wheel one 16, stop bar 17, pointer 18, limiting plate two 19 and limiting handle two 20; A sealing ring 2 is fixedly connected to the inner wall of the valve seat 1. The valve seat 1 is rotatably connected to a rotating tube 3 and a rotating tube 4. A valve plate 5 is fixedly connected between the rotating tube 3 and the rotating tube 4. The valve plate 5 abuts against the sealing ring 2. A spherical shell 6 is embedded in the middle of the valve plate 5. A spherical valve core 7 is rotatably connected inside the spherical shell 6. A rotating rod 8 and a rotating rod 9 are rotatably connected inside the rotating tube 3 and the rotating tube 4, respectively. Both the rotating rod 8 and the rotating rod 9 pass through the valve plate 5 and are fixedly connected to the spherical valve core 7. Connector 10 is fixed to rotating tube 3, and rotating rod 8 passes through connector 10 and the two are rotatably connected; fixing member 11 is rotatably connected to connector 10, valve seat 1 is fixed to limit plate 12, fixing member 11 is fixed to limit handle 13, and limit plate 12 limits limit handle 13; connector 10 is fixed to worm gear 14, fixing member 11 is rotatably connected to worm 15, worm 15 and worm gear 14 mesh, worm 15 is fixed to wheel 16; fixing member 11 is fixed to stop rod 17, worm gear 14 has an arc-shaped groove, stop rod 17 is located in the arc-shaped groove of worm gear 14, stop rod 17 limits worm gear 14; worm gear 14 is fixed to pointer 18, fixing member 11 is provided with scale indicator line; connector 10 is fixed to limit plate 29, rotating rod 8 is fixed to limit handle 20, limit plate 29 limits limit handle 20.

[0025] In use, valve seat 1 is installed on the conveying pipeline. When it needs to be opened, press the limit handle 13 to remove the limit plate 12 from limiting the limit handle 13. Then rotate the limit handle 13, which drives the fixing member 11 to rotate. When the fixing member 11 rotates, the worm 15 rotates circumferentially with the fixing member 11. Since the worm 15 and worm wheel 14 have a self-locking function, the worm 15 and worm wheel 14 remain relatively stationary, which in turn causes the worm wheel 14 to drive the connecting member 10 to rotate. The connecting member 10 drives the rotating tube 3 to rotate. At the same time, during the above process, the limit plate 19 always limits the limit handle 13. When the connector 10 rotates circumferentially, the limiting disc 19 and the limiting handle 20 rotate together with the connector 10. At this time, the rotating rod 8 and the rotating tube 3 are in a relatively stationary state. The rotating tube 3 and the rotating rod 8 drive the valve plate 5 and the ball valve core 7 to rotate respectively. The valve plate 5 separates from the sealing ring 2. The valve plate 5 drives the rotating tube 4 to rotate along the valve seat 1. Then the conveying medium passes through the gap between the valve plate 5 and the sealing ring 2. The flow rate of the medium is adjusted by adjusting the tilt angle of the valve plate 5. The limiting handle 13 is released so that the limiting handle 13 and the limiting disc 12 re-engage.

[0026] When fine-tuning of the flow rate is required, rotate the rotating wheel 16. The rotating wheel 16 drives the worm gear 15 to rotate. Since the limit handle 13 and the limit plate 12 re-engage, the relative position of the worm gear 15 and the fixing part 11 remains unchanged. The worm gear 15 drives the worm wheel 14 to rotate. The worm wheel 14 drives the connecting part 10 and the rotating rod 8 to rotate synchronously. The worm wheel 14 loses contact with the stop rod 17. At the same time, the worm wheel 14 drives the pointer 18 to rotate. The operator can read the scale on the fixing part 11 to know the angle of rotation of the valve plate 5.

[0027] Once valve plate 5 reaches the designated angle, stop rotating wheel 16 to complete the adjustment of valve plate 5's position. Through the above operations, fine regulation of flow rate is achieved. When valve plate 5 needs to be reset, first rotate wheel 16, worm gear 15 drives worm wheel 14 to rotate, causing worm wheel 14 to contact stop rod 17 again. Then press and rotate limit handle 13 to reset limit handle 13. At this time, fixing part 11 drives connecting part 10 and rotating tube 3 to reset through worm wheel 14 and worm gear 15, and valve plate 5 resets. Finally, release limit handle 13, and limit plate 12 limits limit handle 13, completing the valve closure.

[0028] When valve plate 5 cannot meet the requirements for fine adjustment, and valve plate 5 is in the closed state, pressing limit handle 20 will cause limit disc 19 to no longer limit limit handle 20. At this time, rotating limit handle 20 will cause rotating rod 8 to rotate. Rotating rod 8 rotates within rotating tube 3, causing spherical valve core 7 to rotate within spherical shell 6. Spherical valve core 7 then causes rotating rod 9 to rotate within rotating tube 4. When valve plate 5 cannot meet the requirements for fine flow adjustment, spherical valve core 7 is used to achieve fine flow adjustment. After the position of spherical valve core 7 is adjusted, releasing limit handle 20 will cause limit handle 20 to engage with limit disc 19, thus fixing spherical valve core 7 and bringing spherical valve core 7 and valve plate 5 into a relatively stationary state. When it is necessary to reset the spherical valve core 7, simply press the limit handle 20 and rotate it to reset. The limit handle 20 drives the spherical valve core 7 to rotate and reset via the rotating rod 8. The spherical shell 6 seals the spherical valve core 7 to complete the closing operation. Then release the limit handle 20.

[0029] like Figures 6-9 As shown, it also includes a limiting component, which is disposed on the valve seat 1. The limiting component limits the rotating tube 4 and the rotating rod 9. The limiting component includes: friction wheel 21, friction wheel 22, fixing plate 23, fixing column 24, limiting member 25, support plate 26, threaded rod 27, rotating member 28, hinge member 29 and rotating wheel 30. Friction wheel 21 is fixed to rotating tube 4, and rotating rod 9 is fixed to friction wheel 22; fixed plate 23 is fixed to valve seat 1, and rotating tube 4 passes through fixed plate 23; fixed plate 23 is fixed to two fixed posts 24, and fixed posts 24 are rotatably connected to two limiting members 25, one end of the two limiting members 25 abutting against the outer ring surface of friction wheel 21 and friction wheel 22 respectively; fixed plate 23 is fixed to support plate 26, support plate 26 is threaded to threaded rod 27, threaded rod 27 is rotatably connected to rotating member 28, and hinge member 29 is hinged between rotating member 28 and limiting member 25; rotating wheel 30 is fixed to threaded rod 27; the limiting members 25 on both sides are distributed in a figure-eight pattern.

[0030] When it is necessary to adjust the valve plate 5 and the ball valve core 7, firstly, the rotating wheel 30 needs to be rotated. The rotating wheel 30 drives the threaded rod 27 to rotate along the support plate 26. The threaded rod 27 moves laterally along the support plate 26. The threaded rod 27 drives the rotating part 28 to move closer to the support plate 26. The rotating part 28 pulls the limiting part 25 through the hinge part 29. The limiting part 25 rotates along the fixed column 24. The limiting part 25 loses contact with the friction wheel 21 and the friction wheel 22. The limiting part 25 no longer limits the two friction wheels. Then the position of the valve plate 5 and the ball valve core 7 can be adjusted.

[0031] After the positions of valve plate 5 and valve core are adjusted, the second rotating wheel 30 is rotated in the opposite direction. The second rotating wheel 30 drives the threaded rod 27 to rotate, and the rotating part 28 moves away from the support plate 26. The rotating part 28 pushes the outer end of the limiting part 25 through the hinge 29. The limiting part 25 rotates along the fixed column 24, and the inner end of the limiting part 25 presses against the outer ring surface of the first friction wheel 21 and the second friction wheel 22, limiting and fixing the first friction wheel 21 and the second friction wheel 22. By limiting and fixing the first friction wheel 21 and the second friction wheel 22 through the limiting part 25, the stability of valve plate 5 and ball valve core 7 is improved, and accidental contact with the first limiting handle 13 and the second limiting handle 20 is prevented, which would cause valve plate 5 and ball valve core 7 to rotate, resulting in a change in the flow rate of the medium in the pipeline.

[0032] Working principle of the invention: Securely install valve seat 1 onto the delivery pipeline, ensuring sealing ring 2 is properly fitted with the pipeline flange. Before making any angular adjustments to valve plate 5 or ball valve core 7, the locking mechanism on rotating tube 4 and rotating rod 9 must be released. The specific operation is as follows: Rotating the second rotating wheel 30 causes the threaded rod 27 to rotate on the support plate 26. Since the support plate 26 and the threaded rod 27 are threadedly engaged, the threaded rod 27 moves axially towards the support plate 26. The threaded rod 27 drives the rotating component 28 to move synchronously. The rotating component 28 pulls the outer ends of the two limiting components 25 through the hinge 29, causing the limiting components 25 to rotate around the fixed column 24. The inner ends of the limiting components 25 swing outward, disengaging from the outer ring surfaces of the first friction wheel 21 and the second friction wheel 22, thereby releasing the circumferential locking of the second rotating tube 4 and the second rotating rod 9. At this time, the first limiting handle 13 or the second limiting handle 20 can be freely operated to perform the aforementioned adjustments.

[0033] When the valve needs to be opened or routine flow adjustment is required, the operator presses the limit handle 13 to disengage it from the limit groove of the limit plate 12, releasing the circumferential constraint on the fixing component 11. Then, the limit handle 13 is rotated, causing the fixing component 11 to rotate circumferentially around the axis of the rotating tube 3. At this time, because the worm gear 15 and worm wheel 14 are engaged and have a self-locking function, the worm gear 15 and worm wheel 14 remain relatively stationary, and the fixing component 11 drives the connecting component 10 to rotate synchronously through the worm gear 15 and worm wheel 14. The connecting component 10 drives the rotating tube 3 to rotate, which in turn drives the valve plate 5 to rotate. Simultaneously, the valve plate 5 drives the rotating tube 4 to rotate along the valve seat 1, causing the valve plate 5 to gradually separate from the sealing ring 2, forming a flow gap.

[0034] During the above process, the limiting disc 19 and the limiting handle 20 rotate circumferentially together with the connecting piece 10. Because the limiting handle 20 and the limiting disc 19 mutually limit each other, the rotating rod 8 and the rotating tube 3 remain relatively stationary, so the spherical valve core 7 does not rotate relative to the valve plate 5. By controlling the rotation angle of the limiting handle 13, the tilt angle of the valve plate 5 can be adjusted, thereby changing the cross-sectional area of ​​the medium passing through the gap and achieving flow regulation. After adjustment, the limiting handle 13 is released, and the limiting handle 13 re-engages with the limiting disc 12, locking the fixing piece 11 and maintaining the position of the valve plate 5.

[0035] When coarse adjustment fails to meet flow accuracy requirements, with limit handle 13 locked, the operator rotates wheel 16. Wheel 16 drives worm 15 to rotate around its own axis. Because the fixing part 11 is locked by limit handle 13, the axial position of worm 15 is fixed. The rotation of worm 15 drives worm wheel 14 to rotate around the axis of rotating tube 3. When worm wheel 14 rotates, its arc-shaped groove disengages from the stop rod 17, and worm wheel 14 causes a slight angular displacement in connecting part 10 and rotating tube 3.

[0036] During the above process, the pointer 18 fixed to the worm gear 14 deflects accordingly. The operator can then determine the angle at which the valve plate 5 rotates by reading the scale indicator on the fixing component 11. By controlling the number of rotations of the worm gear 15, stepless adjustment of the valve plate 5's angle can be achieved. When the valve plate 5 reaches the desired angle, the rotation of the first rotating wheel 16 stops. Utilizing the self-locking characteristic of the worm gear 14 and worm gear 15, the valve plate 5 is held in that position, completing the fine adjustment of the flow rate. When the valve needs to be closed, first rotate the rotating wheel 16 in the reverse direction, causing the worm gear 15 to drive the worm wheel 14 in reverse until the end of the arc-shaped groove on the worm wheel 14 contacts the stop rod 17 again. At this time, the worm wheel 14 and the connecting piece 10 return to their initial positions. Then, press and rotate the limit handle 13, causing it to drive the fixing piece 11 to rotate in the reverse direction. The fixing piece 11 drives the connecting piece 10, the rotating tube 3, and the valve plate 5 to rotate in the reverse direction through the worm wheel 14 and the worm gear 15. The valve plate 5 gradually presses the sealing ring 2, while the rotating tube 4 rotates back to its original position along the valve seat 1. Release the limit handle 13, and the limit handle 13 will re-engage with the limit plate 12, completing the valve closing operation.

[0037] When valve plate 5 cannot meet the fine adjustment, the adjustment function of ball valve core 7 is activated. After valve plate 5 is adjusted (including the closed state), the operator presses limit handle 20, which disengages from the limit plate 19. Then, limit handle 20 is rotated, which drives rotating rod 8 to rotate in rotating tube 3. Rotating rod 8 drives ball valve core 7 to rotate in spherical shell 6. At the same time, ball valve core 7 drives rotating rod 9 to rotate in rotating tube 4.

[0038] The rotation of the spherical valve core 7 changes the orientation of its flow orifice, superimposing an additional throttling effect on the flow cross-section formed by the valve plate 5, achieving fine compensation and regulation of the flow rate. After adjustment, release the limit handle 20, and the limit handle 20 re-engages with the limit disc 19, locking the rotating rod 8, so that the spherical valve core 7 and the valve plate 5 remain relatively stationary. When it is necessary to reset the spherical valve core 7, press and rotate the limit handle 20 in the opposite direction again, so that the spherical valve core 7 rotates back to the initial fully open or fully closed position. The inner spherical surface of the spherical shell 6 and the outer spherical surface of the spherical valve core 7 form a sealing fit, completing the reset, and then release the limit handle 20.

[0039] After adjusting the valve plate 5 and the spherical valve core 7, the rotating wheel 30 is rotated in the opposite direction, causing the threaded rod 27 to move away from the support plate 26. The rotating component 28 pushes the outer end of the limiting component 25 through the hinge 29. The limiting component 25 rotates in the opposite direction around the fixed column 24, and its inner end presses against the outer ring surfaces of the friction wheel 21 and the friction wheel 22 again, using friction to lock and fix the rotating tube 4 and the rotating rod 9. This locking operation not only improves the stability of the valve plate 5 and the spherical valve core 7 in the working state, but also effectively prevents the valve plate 5 or the spherical valve core 7 from being accidentally rotated due to accidental contact with the limiting handle 13 or the limiting handle 20, thereby avoiding changes in the flow rate of the medium in the pipeline.

[0040] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A butterfly valve that is easy to adjust, characterized in that, include: A valve seat (1) is provided with a sealing ring (2) fixedly connected to its inner wall. The valve seat (1) is rotatably connected to a rotating tube one (3) and a rotating tube two (4). A valve plate (5) is fixedly connected between the rotating tube one (3) and the rotating tube two (4). The valve plate (5) abuts against the sealing ring (2). A spherical shell (6) is embedded in the middle of the valve plate (5). A spherical valve core (7) is rotatably connected inside the spherical shell (6). Rotating rod one (8) and rotating rod two (9) are rotatably connected inside the rotating tube one (3) and the rotating tube two (4), respectively. Both the rotating rod one (8) and the rotating rod two (9) pass through the valve plate (5) and are fixedly connected to the spherical valve core (7). An adjustment structure is provided on the valve seat (1), and the adjustment structure is used to adjust the opening and closing angle of the valve plate (5) and the ball valve core (7).

2. The butterfly valve for easy adjustment according to claim 1, characterized in that, The adjustment structure includes: A connector (10) is fixed to the first rotating tube (3), and the first rotating rod (8) passes through the connector (10) and the two are rotatably connected. The fixing member (11) is rotatably connected to the connecting member (10). The valve seat (1) is fixedly connected to the limiting plate (12). The fixing member (11) is fixedly connected to the limiting handle (13). The limiting plate (12) limits the limiting handle (13).

3. The butterfly valve for easy adjustment according to claim 2, characterized in that, The connector (10) is fixedly connected to a worm gear (14), and the fixing member (11) is rotatably connected to a worm (15). The worm (15) and the worm gear (14) mesh with each other, and the worm (15) is fixedly connected to a rotating wheel (16).

4. The easily adjustable butterfly valve according to claim 3, characterized in that, The fixing member (11) is fixedly connected to a stop bar (17), the worm wheel (14) has an arc-shaped groove, the stop bar (17) is located in the arc-shaped groove of the worm wheel (14), and the stop bar (17) limits the worm wheel (14).

5. The butterfly valve for easy adjustment according to claim 4, characterized in that, The worm gear (14) is fixedly connected to a pointer (18), and the fixing member (11) is provided with a scale indicator line.

6. The butterfly valve for easy adjustment according to claim 2, characterized in that, The connector (10) is fixed to the second limiting disk (19), the first rotating rod (8) is fixed to the second limiting handle (20), and the second limiting disk (19) limits the second limiting handle (20).

7. The butterfly valve for easy adjustment according to claim 1, characterized in that, It also includes a limiting component, which is disposed on the valve seat (1) and limits the rotation tube (4) and the rotation rod (9). The limiting component includes: Friction wheel one (21) is fixedly connected to the rotating tube two (4), and friction wheel two (22) is fixedly connected to the rotating rod two (9). The fixed plate (23) is fixed to the valve seat (1), and the rotating tube (4) passes through the fixed plate (23).

8. The butterfly valve for easy adjustment according to claim 7, characterized in that, The fixed plate (23) is fixedly connected to two fixed posts (24), and the fixed posts (24) are rotatably connected to two limiting members (25). One end of the two limiting members (25) abuts against the outer ring surface of the first friction wheel (21) and the second friction wheel (22), respectively.

9. The easily adjustable butterfly valve according to claim 8, characterized in that, The fixed plate (23) is fixedly connected to the support plate (26), the support plate (26) is threadedly connected to the threaded rod (27), the threaded rod (27) is rotatably connected to the rotating part (28), the rotating part (28) and the limiting part (25) are hinged to the hinge (29), and the threaded rod (27) is fixedly connected to the rotating wheel (30).

10. A butterfly valve that is easy to adjust according to claim 9, characterized in that, The limiting members (25) on both sides are arranged in a figure-eight pattern.

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