A fan valve with multiple concentrically distributed valve cores and synchronously linked switching.

Abstract

This invention discloses a sector valve with multiple concentrically distributed and synchronously linked valve cores, belonging to the field of valve technology. It includes a valve body, a flange, and valve cores; it also includes an annular linkage disc concentrically arranged on the outside of the valve body and rotatably mounted on the lower flange; multiple bushings circumferentially distributed on the outside of the valve body and connected and fixed to the inside of the valve body; multiple sector valve cores circumferentially distributed and rotatably mounted in each bushing; and a linkage mechanism movably connecting each sector valve core to the same annular linkage disc. Clockwise rotation of the annular linkage disc drives all sector valve cores to rotate around the bushing to open the valve body; counterclockwise rotation of the annular linkage disc drives all sector valve cores to rotate around the bushing to close the valve body. This sector valve employs a multi-sector valve core synchronous linkage design, reducing opening and closing resistance; its concentric distribution structure makes the flow rate and rotation angle more linear, improving control accuracy.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a fan valve with multiple valve cores concentrically distributed and synchronously linked for switching. Background Technology

[0002] Traditional butterfly valves are valves that achieve on / off switching or flow regulation by rotating a single circular valve plate (butterfly plate) around the valve stem. Although their structure is simple, they have the following inherent defects in practical applications:

[0003] High opening and closing resistance: The area of ​​a single butterfly plate is relatively large. When rotating, it is necessary to overcome the impact force of the fluid on the butterfly plate and the friction force between the butterfly plate and the sealing surface of the valve body, resulting in high resistance during opening and closing, especially in high pressure or high viscosity fluid scenarios.

[0004] Low flow control accuracy: The rotation angle of a single butterfly plate has a non-linear relationship with the flow rate (especially at small openings, the flow rate changes drastically), making it difficult to achieve fine adjustment (such as accuracy within ±2%).

[0005] Insufficient synchronization: If a multi-butterfly plate structure (such as a double eccentric butterfly valve) is used, each butterfly plate needs to be driven independently. Due to machining errors or delays in the drive system, the actions are not synchronized, which aggravates flow fluctuations.

[0006] Limited application scenarios: After a traditional butterfly valve is opened, the fluid flows symmetrically along the center of the butterfly plate, which cannot achieve eccentric flow (such as special scenarios requiring eccentric shearing), thus limiting its applicability. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a fan valve with multiple concentrically distributed valve cores that are synchronously linked and switched. It is a novel fan valve with a compact structure, high synchronization and precise flow control. It adopts a multi-fan-shaped valve core synchronous linkage design to reduce opening and closing resistance. Its concentric distribution structure makes the flow rate and rotation angle more linear, thereby improving control accuracy.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A sector valve with multiple concentrically distributed and synchronously linked valve cores includes a valve body, flanges (upper flange and lower flange) mounted (by bolts or welding) at the upper and lower ends of the valve body, and valve cores installed within the valve body. Its core improvements include: an annular linkage disc concentrically set (welded) to the outside of the valve body and rotatably mounted on the lower flange (to achieve rotational movement around the center of the valve body); multiple bushings (the number matching the number of sector valve cores, such as 5 or 6) circumferentially distributed on the outside of the valve body and connected and fixed to the inside of the valve body (providing support and guidance for the sector valve cores); and valve cores divided equally (each sector valve core has a central angle of 360° / number of cores, such as 72° for 5 cores). Multiple circumferentially distributed sector valve cores (serving as the switching elements of the valve body) are rotatably mounted in each bushing via bearings, and a linkage mechanism movably connects each sector valve core to the same annular linkage disc (ensuring that all sector valve cores rotate synchronously when the annular linkage disc rotates); each pair of adjacent sector valve cores and the sector valve cores are tightly fitted to the inner wall of the valve body (gaps are compensated by precision machining or elastic seals); rotating the annular linkage disc clockwise drives all sector valve cores to rotate around the bushing to open the valve body (the flow channel cross-sectional area gradually increases from 0), and rotating the annular linkage disc counterclockwise drives all sector valve cores to rotate around the bushing to close the valve body (the flow channel cross-sectional area gradually decreases from the maximum to 0).

[0010] By adopting the above scheme, the multiple sector valve cores of this valve are synchronously driven to rotate (without the large-area rotational inertia of a single butterfly plate), and the contact area between the outer arc surface of a single sector valve core and the inner wall of the valve body is only 1 / 5 of that of a traditional butterfly plate (taking 5 sector valve cores as an example). During rotation, the fluid resistance is reduced by 40%-60% (in actual high-pressure water scenarios, the opening and closing torque is reduced from 120 N·m of the traditional butterfly valve to 70 N·m). The sector valve cores are concentrically distributed around the center of the valve body, and when opened, the flow channel is a regular sector combination (cross-sectional area = θ / 360° × maximum cross-sectional area of ​​the valve body, where θ is the rotation angle). The flow rate and the rotation angle are almost linearly related (taking 5 sector valve cores as an example, the linearity is ≥0.98, while that of a traditional single butterfly valve is only 0.82), which can improve the accuracy of flow regulation.

[0011] As a preferred embodiment of a sector valve with multiple valve cores concentrically distributed and synchronously linked, the linkage mechanism includes a fixed rocker arm fixedly connected (by bolts or welding) to the outer end of the sector valve core shaft, a fixed connecting rod fixedly connected (integral with the annular linkage disc or fixed by bolts) above the annular linkage disc, and a telescopic rocker assembly that rotatably connects the fixed rocker arm and the fixed connecting rod. This allows the telescopic rocker assembly to transmit rotational force even when the sector valve core moves slightly radially, thus solving the problem of radial displacement of the sector valve core caused by machining errors or thermal expansion.

[0012] As a preferred embodiment of a sector valve with multiple valve cores concentrically distributed and synchronously linked, the telescopic rocker assembly includes two sets of telescopic sleeves arranged back-to-back and coaxially (length adjustable range 0-50mm), a universal ball that is always limited to rotating within the end of the telescopic sleeve (allowing local angular deviation ±5°), and a lead screw (pitch 5mm, the total length can be adjusted by rotating the lead screw to compensate for the radial displacement of the sector valve core).

[0013] As a preferred embodiment of a fan valve with multiple valve cores concentrically distributed and synchronously linked, an assembly hole is provided at the center of the universal ball; the ends of the two sets of telescopic sleeves are connected to a fixed rocker arm and a fixed connecting rod respectively through positioning screws that extend into the assembly hole and positioning nuts installed on the positioning screws, ensuring that the universal ball can swing around the positioning screws at a small angle, while limiting the radial displacement of the telescopic sleeves.

[0014] As a preferred embodiment of a sector valve with multiple valve cores concentrically distributed and synchronously linked, it further includes a handle connected (by bolts or welding) to an annular linkage disc and extending outward, a guide shaft fixed (integrated with the handle or by bolts) to the inner end of the handle, and a guide groove concentrically formed on the lower flange. The guide shaft is always located within the guide groove, and the shaft body and the groove wall are interference-fitted to restrict the annular linkage disc to rotate only along the arc trajectory of the guide groove, thus preventing deviation. The guide groove has evenly distributed angle scale lines along the edge of the groove opening, from the beginning of the guide groove (fully open position, corresponding to the sector valve core being fully open) to the end of the guide groove (fully closed position, corresponding to the sector valve core being fully closed). The range of the angle scale lines is 0-90° (accuracy 0.5°). By observing the angle scale lines, the user can intuitively control the valve opening angle (e.g., when the arrow points to the 45° scale line, the valve is 50% open).

[0015] In a preferred embodiment of a sector valve with multiple valve cores concentrically distributed and synchronously linked, a plurality of circumferentially arrayed limit guide wheels with limit grooves are rotatably installed at the edge of the lower flange. The inner ring of the annular linkage disc is simultaneously limited within the limit grooves (arc-shaped limit grooves) of all the limit guide wheels. When the annular linkage disc rotates, its inner ring rolls along the limit grooves, limiting the radial runout to ≤0.2mm and avoiding collision with the valve body or the lower flange.

[0016] The second technical problem to be solved by the present invention is to provide a fan valve with multiple valve cores concentrically distributed and synchronously linked on / off. This novel fan valve has a compact structure, high synchronization, precise flow control, and the ability to achieve eccentric flow. By disconnecting the linkage mechanism from one or more fan-shaped valve cores, the disconnected fan-shaped valve core is always kept in a normally closed state. At this time, eccentric flow can be achieved when the valve body is opened / closed. It is suitable for special scenarios such as those requiring eccentric shearing and has a wider range of applications.

[0017] To achieve the above objectives, the present invention adopts the following technical solution:

[0018] Based on the above scheme, it also includes normally closed insert groups connected to the outside of the valve body and distributed near each bushing; the normally closed insert groups can self-lock individual sector valve cores to keep the valve body normally closed. The normally closed insert group includes normally closed sleeves (round tubular structure, fixed to the valve body by welding) parallel to the bushings and connected to the outside of the valve body, and normally closed pins (ordinary steel pins) that pass through the fixed rocker arm and are inserted into the normally closed sleeves, at which time the individual sector is in a fully closed state (rotation angle 0°).

[0019] By adopting the above solution, the valve disconnects the linkage mechanism from one or more sector valve cores, keeping the disconnected sector valve core in a normally closed state. At this time, eccentric flow can be achieved when the valve body is opened / closed, which is suitable for special scenarios that require eccentric shearing (such as when a bend with a 180° angle is connected after the valve), and its application scenarios are wider.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. Low opening and closing resistance: Multiple sector valve cores rotate synchronously (without the large area rotational inertia of a single butterfly plate), and the contact area between the outer arc surface of the sector valve core and the inner wall of the valve body is only 1 / 5 of that of a traditional butterfly plate (taking 5 sector valve cores as an example). The fluid resistance is reduced by 40%-60% during rotation (in actual high-pressure water scenarios, the opening and closing torque is reduced from 120 N·m of the traditional butterfly valve to 70 N·m).

[0022] 2. High flow control accuracy: The fan-shaped valve cores are concentrically distributed around the center of the valve body. When open, the flow channel is a regular fan-shaped combination (cross-sectional area = θ / 360° × maximum cross-sectional area of ​​the valve body, where θ is the rotation angle). The flow rate and rotation angle are more linearly related (linearity ≥ 0.98, while traditional butterfly valves are only 0.82), achieving a flow regulation accuracy within ±2% (traditional butterfly valve error ±5%).

[0023] 3. Excellent synchronization: The annular linkage disc is rigidly connected to all sector valve cores through a telescopic rocker assembly, eliminating the asynchrony problem caused by driving error or thermal expansion in traditional multi-valve cores (synchronization error ≤0.5°, valve error of traditional multi-valve cores ≥3°), and reducing flow fluctuation amplitude by more than 70%.

[0024] 4. Convenient operation: The combination of the throttle and the guide groove provides intuitive operation guidance (through the angular scale lines) to avoid misoperation.

[0025] 5. Expanded application scenarios: By adjusting the number and central angle of the sector valve cores (e.g., 6 sector valve cores, each with a central angle of 60°), it can flexibly adapt to fluid pipelines of different diameters; at the same time, the coordinated action of multiple sector valve cores can reduce fluid eddies (compared to the single eddies of traditional butterfly plates, the eddy intensity of this structure is reduced by 50%), making it suitable for scenarios with high requirements for fluid stability (such as precision instrument liquid supply systems).

[0026] 6. Special application scenarios: By disconnecting the linkage mechanism from one or more sector valve cores, the disconnected sector valve core will always remain in a normally closed state. At this time, eccentric flow can be achieved when the valve body is opened / closed. It is suitable for special scenarios that require eccentric shearing (such as when a bend with a 180° angle is connected after the sector valve), and its application scenarios are wider. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A three-dimensional structure of a sector valve with multiple concentrically distributed valve cores that switch synchronously. Figure 1 ;

[0029] Figure 2 A three-dimensional structure of a sector valve with multiple concentrically distributed valve cores that switch synchronously. Figure 2 ;

[0030] Figure 3 A front view of a sector valve with multiple valve cores concentrically distributed and synchronously linked for switching;

[0031] Figure 4 A top view of a sector valve with multiple valve cores concentrically distributed and synchronously linked for switching;

[0032] Figure 5 for Figure 1 A three-dimensional structural diagram of the valve cores in the middle when all the sector valve cores are synchronized.

[0033] Figure 6 for Figure 5 A magnified view of the area within the dashed line region;

[0034] Figure 7 for Figure 6 3D structural diagram of the telescopic joystick assembly;

[0035] Figure 8 for Figure 1 A three-dimensional structural diagram of the central sector valve core when it is self-locked;

[0036] Figure 9 for Figure 8 A magnified view of the area within the dashed line region;

[0037] Figure 10 for Figure 1 A schematic diagram of the main structure showing the self-locking of the central sector valve core and its application in eccentric flow.

[0038] Figure 11 for Figure 1 A top view of the structure where the central sector valve core is self-locked and applied to eccentric flow;

[0039] The markings in the diagram are: 1-Valve body; 2-Flange; 3-Annular linkage disc; 4-Sleeve; 5-Sector valve core; 6-Linkage mechanism; 61-Fixed rocker arm; 62-Fixed connecting rod; 63-Telescopic rocker arm assembly; 631-Telescopic sleeve; 632-Universal ball; 633-Screw; 64-Positioning screw; 65-Positioning nut; 7-Turner; 8-Guide shaft; 9-Guide groove; 10-Limiting guide wheel; 11-Normally closed insert assembly; 111-Normally closed socket; 112-Normally closed pin; 12-180° bend. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1, as Figures 1 to 5As shown, a sector valve with multiple concentrically distributed and synchronously linked valve cores is provided. As a valve for switching or flow regulation, it specifically includes a valve body 1 (cylindrical cavity), flanges 2 (upper flange and lower flange) mounted (welded) to the upper and lower ends of the valve body 1, and valve cores installed inside the valve body 1. Its core improvements are as follows: it also includes an annular linkage disc 3 (for rotation around the center of the valve body 1) concentrically set (welded) to the outside of the valve body 1 and rotatably mounted on the lower flange 2; five bushings 4 (the number matching the number of five sector valve cores) circumferentially distributed on the outside of the valve body 1 and connected and fixed to the inside of the valve body 1 (providing support and guidance for the sector valve cores 5); and multiple circumferentially distributed valve cores (each sector valve core 5 with a central angle of 72°) divided into five equal parts, each rotatably mounted on a bearing. The sleeve 4 contains a sector valve core 5 (which serves as the switching element of the valve body 1) and a linkage mechanism 6 that movably connects each sector valve core 5 to the same annular linkage disc 3 (ensuring that all sector valve cores 5 rotate synchronously when the annular linkage disc 3 rotates); each pair of adjacent sector valve cores 5 and the sector valve core 5 and the inner wall of the valve body 1 are tightly fitted (a 0.1mm gap is reserved during processing to achieve a sealing fit with a nitrile rubber ring), ensuring zero leakage in the fully closed state (leakage ≤ 0.01mL / min); rotating the annular linkage disc 3 clockwise can drive all sector valve cores 5 to rotate around the sleeve 4 to open the valve body 1 (the flow channel cross-sectional area gradually increases from 0), and rotating the annular linkage disc 3 counterclockwise can drive all sector valve cores 5 to rotate around the sleeve 4 to close the valve body 1 (the flow channel cross-sectional area gradually decreases from the maximum to 0). The five sector valve cores 5 of this valve are driven to rotate synchronously (without the large rotational inertia of a single butterfly valve), and the contact area between the outer arc surface of a single sector valve core 5 and the inner wall of the valve body 1 is only 1 / 5 of that of a traditional butterfly valve. When rotating, the fluid resistance is reduced by 40%-60% (in actual high-pressure water scenarios, the opening and closing torque is reduced from 120 N·m of the traditional butterfly valve to 70 N·m). The sector valve cores 5 are concentrically distributed with the center of the valve body 1 as the axis. When open, the flow channel is a regular sector combination (cross-sectional area = θ / 360° × maximum cross-sectional area of ​​valve body 1, where θ is the rotation angle). The flow rate and the rotation angle are almost linearly related (taking five sector valve cores 5 as an example, the linearity is ≥0.98, while that of a traditional single butterfly valve is only 0.82), which can improve the accuracy of flow regulation.

[0042] like Figure 6 As shown, the linkage mechanism 6 includes a fixed rocker arm 61 fixedly connected (by bolts) to the outer end of the rotating shaft of the sector valve core 5, a fixed connecting rod 62 fixedly connected (by bolts) to the top of the annular linkage disc 3, and a telescopic rocker assembly 63 that rotatably connects the fixed rocker arm 61 and the fixed connecting rod 62. The telescopic rocker assembly 63 can still transmit rotational force when the sector valve core 5 moves slightly radially, so as to solve the problem of radial displacement of the sector valve core 5 caused by machining errors or thermal expansion.

[0043] like Figure 7 As shown, the telescopic rocker assembly includes two sets of telescopic sleeves 631 arranged in opposite directions and coaxially (length adjustable range 0-50mm), a universal ball 632 that is always limited to rotating within the end of the telescopic sleeve 631 (allowing local angular deviation ±5°), and a lead screw 633 (pitch 5mm, the total length can be adjusted by rotating the lead screw 633 to compensate for the radial displacement of the sector valve core 5).

[0044] like Figures 6 to 7 As shown, an assembly hole is provided at the center of the universal ball 632; the ends of the two sets of telescopic sleeves 631 are connected to the fixed rocker arm 61 and the fixed connecting rod 62 respectively through the positioning screws 64 that extend into the assembly hole and the positioning nuts 65 installed on the positioning screws 64, so as to ensure that the universal ball 632 can swing around the positioning screws 64 at a small angle, while limiting the radial displacement of the telescopic sleeves 631.

[0045] like Figures 3 to 4 As shown, it also includes a handle 7 connected (fixed by bolts) to the annular linkage disc 3 and extending outward, a guide shaft 8 fixed (fixed by bolts) to the inner end of the handle 7, and a guide groove 9 concentrically opened on the lower flange 2. The guide shaft 8 is always located in the guide groove 9, and the shaft body of the guide shaft 8 and the groove wall of the guide groove 9 are interference fit to restrict the annular linkage disc 3 to rotate only along the arc trajectory of the guide groove 9 and avoid deviation. The guide groove 9 has a rotation angle scale line evenly distributed from the beginning of the guide groove 9 (fully open position, corresponding to the sector valve core 5 being fully open) to the end of the guide groove 9 (fully closed position, corresponding to the sector valve core 5 being fully closed) along the edge of the groove opening. The range of the rotation angle scale line is 0-90° (accuracy 0.5°). By observing the angle scale line, the user can intuitively control the valve opening angle (e.g., when the arrow points to the 45° scale line, the valve is 50% open).

[0046] Continue as Figures 3 to 4 As shown, multiple circumferentially arrayed guide wheels 10 with limiting grooves are rotatably installed at the edge of the lower flange 2. The inner ring of the annular linkage disc 3 is simultaneously limited within the limiting grooves (arc-shaped limiting grooves) of all the guide wheels 10. When the annular linkage disc 3 rotates, its inner ring rolls along the limiting grooves, limiting the radial runout to ≤0.2mm, thus avoiding collision with the valve body 1 or the lower flange 2.

[0047] The working process of a sector valve with multiple concentrically distributed valve cores and synchronously linked switching:

[0048] Opening the valve (fully open): Rotate the handle 7 clockwise. The handle 7 moves along the guide groove 9 from 0° to 90° via the guide shaft 8, causing the annular linkage disc 3 to rotate clockwise synchronously. The annular linkage disc 3 pulls all the fixed rocker arms 61 to rotate clockwise synchronously via the fixed connecting rod 62 and the telescopic rocker assembly 63, thereby driving the sector valve core 5 to rotate clockwise around the bushing 4. The gap between adjacent sector valve cores 5 gradually increases (the larger the rotation angle θ, the larger the total gap), and the valve opens. When the arrow on the handle 7 aligns with the 90° scale line of the guide groove 9, the sector valve core 5 rotates to the maximum opening position (fully open).

[0049] To close the valve (fully closed): Rotate the handle 7 counterclockwise. Similarly, the annular linkage disc 3 drives the sector valve to rotate counterclockwise, gradually reducing the gap until it is closed (fully closed). When the arrow on the handle 7 aligns with the 0° scale line of the guide groove 9, the sector valve core 5 rotates to the closed position (fully closed).

[0050] Intermediate state adjustment (e.g., half-open): If it is necessary to maintain 50% opening (rotation angle 45°), when the arrow on the rotating handle 7 is aligned with the 45° scale line of the guide groove 9, the sector valve core 5 is at 50% opening (half-open).

[0051] Example 2, as Figures 8 to 11 As shown, the difference between this embodiment and Embodiment 1 is that, based on Embodiment 1, it also includes a normally closed insert group 11 connected to the outside of the valve body 1 and distributed near each bushing 4; the normally closed insert group 11 can self-lock a single sector valve core 5 to keep the valve body 1 normally closed. The normally closed insert group 11 includes a normally closed sleeve 111 (a cylindrical structure, fixed to the valve body 1 by welding) parallel to the bushing 4 and connected to the outside of the valve body 1, and a normally closed pin 112 (ordinary steel pin) inserted into the normally closed sleeve 111 through the fixed rocker arm 61. At this time, the single sector is in a completely closed state (rotation angle 0°). By disconnecting the linkage mechanism 6 from one or more sector valve cores 5, the disconnected sector valve core 5 is always kept in a normally closed state. At this time, eccentric flow can be achieved when opening / closing the valve body 1, which is suitable for special scenarios that require eccentric shearing (a bend with a 180° angle is connected after the sector valve), and its application scenarios are wider.

[0052] continue Figures 10 to 11As shown, multiple sector valves with concentrically distributed and synchronously linked valve cores are concentrically installed on a 180° bend 12. Two sector valve cores 5 near the outer ring (right side) of the bend are normally closed (disconnected from the linkage mechanism 6 and self-locked by the normally closed plug group 11), while three sector valve cores 5 near the inner ring (left side) of the bend are in normal linked state (connected to the linkage mechanism 6). During use, the eccentric flow method utilizes the linkage mechanism 6 to simultaneously open the three sector valve cores 5 (left side). At this time, the centrifugal force of the fluid decreases, and its shear impact force on the 180° bend 12 is reduced, which can extend the service life of the 180° bend 12.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fan valve with multiple valve discs concentrically distributed and synchronously linked, comprising a valve body, flanges installed on the upper and lower ends of the valve body, and valve discs installed in the valve body; characterized in that Further comprising a ring-shaped linkage disc concentrically arranged on the outside of the valve body and rotatably installed on the lower flange, multiple shaft sleeves distributed circumferentially on the outside of the valve body and fixedly connected with the inside of the valve body, fan-shaped valve discs equally divided from the valve discs and rotatably installed in each shaft sleeve, and linkage mechanisms movably connecting each fan-shaped valve disc with the same ring-shaped linkage disc; Each adjacent two fan-shaped valve discs are tightly fitted with each other and with the inner wall of the valve body; Clockwise rotation of the ring-shaped linkage disc can drive all fan-shaped valve discs to rotate around the shaft sleeve to open the valve body, and counterclockwise rotation of the ring-shaped linkage disc can drive all fan-shaped valve discs to rotate around the shaft sleeve to close the valve body; The linkage mechanism comprises a fixed rocker arm fixedly connected with the outer end of the rotating shaft of the fan-shaped valve disc, a fixed connecting rod fixedly connected above the ring-shaped linkage disc, and a telescopic rocker assembly rotatably connecting the fixed rocker arm with the fixed connecting rod; The telescopic rocker assembly comprises two groups of telescopic sleeves arranged coaxially and oppositely, a universal ball always positioned and rotated in the end of the telescopic sleeve, and a lead screw coaxially connecting the two groups of telescopic sleeves.

2. Sector valve with multiple spool concentric distribution and synchronized gang switch according to claim 1, characterized in that: A mounting hole is formed in the center of the universal ball; the ends of the two groups of telescopic sleeves are connected with the fixed rocker arm and the fixed connecting rod respectively through positioning screws inserted into the mounting hole and positioning nuts installed on the positioning screws.

3. The fan valve of claim 1, wherein: Further comprising a handle connected with the ring-shaped linkage disc and extending outward, a guide shaft fixedly installed in the inner end of the handle, and a guide groove concentrically formed in the lower flange; wherein the guide shaft is always located in the guide groove.

4. Sector valve with multiple spool concentric distribution and synchronized gang switch according to claim 3, characterized in that: The guide shaft body is in interference fit with the guide groove wall.

5. The fan valve of claim 3, wherein: The guide groove is provided with corner scale lines evenly distributed from the beginning to the end of the guide groove along the edge of the groove opening, and the range of the corner scale lines is 0-90°.

6. The fan valve of claim 1, wherein: The lower flange is rotatably installed with multiple limit guide wheels distributed in an array and provided with limit grooves, and the inner ring of the ring-shaped linkage disc is simultaneously limited in the limit grooves of all limit guide wheels.

7. Sector valve with multiple spool concentric distribution and synchronized gang switch according to any of claims 1-6, characterized in that: Further comprising a normally closed plug-in assembly connected with the outside of the valve body and distributed near each shaft sleeve; through the normally closed plug-in assembly, a single fan-shaped valve disc can be self-locked to keep the valve body normally closed.

8. Sector valve with multiple spool concentric distribution and synchronized gang switch according to claim 7, characterized in that: The normally closed plug-in assembly comprises a normally closed plug sleeve parallel to the shaft sleeve and connected with the outside of the valve body, and a normally closed plug pin inserted into the normally closed plug sleeve through the fixed rocker arm; at this time, a single fan-shaped valve disc is in a completely closed state.

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