Fan valve with multiple valve elements distributed concentrically and opened and closed synchronously in linkage mode

Abstract

The invention discloses a fan valve with multiple concentrically-distributed valve cores and synchronously linked opening and closing, which belongs to the technical field of valves and comprises a valve body, a flange plate and the valve cores. The annular linkage disc is concentrically arranged on the outer side of the valve body and rotationally mounted on the lower flange plate; the shaft sleeves are circumferentially distributed on the outer side of the valve body and are communicated and fixed with the inner side of the valve body in the outer side of the valve body; the valve element is equally divided into a plurality of fan-shaped valve elements which are distributed in the circumferential direction and rotationally installed in the shaft sleeves respectively, and the linkage mechanisms movably connect the fan-shaped valve elements with the same annular linkage disc. The annular linkage disc is rotated clockwise to drive all the fan-shaped valve elements to rotate with the shaft sleeve as the center to open the valve body, and the annular linkage disc is rotated anticlockwise to drive all the fan-shaped valve elements to rotate with the shaft sleeve as the center to close the valve body. The fan valve adopts a multi-fan-shaped valve core synchronous linkage design, so that the opening and closing resistance is reduced; a concentric distribution structure is utilized, so that the flow and the rotation angle tend to be linear, and the control precision is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valves, in particular to a fan valve with multiple valve cores in concentric distribution and synchronous linkage. BACKGROUND

[0002] A traditional butterfly valve is a valve for realizing opening and closing or flow regulation by rotating a single circular valve plate (butterfly plate) around a valve rod, and the structure is simple, but the following inherent defects exist in actual application.

[0003] Large opening and closing resistance: the single butterfly plate has a large area, and when rotating, 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 need to be overcome, resulting in large resistance in the opening and closing process, especially in high-pressure or high-viscosity fluid scenes;

[0004] Low flow control precision: the rotation angle of the single butterfly plate has a nonlinear relationship with the flow (especially at small opening degrees, the flow changes dramatically), and it is difficult to achieve fine adjustment (such as an accuracy within ±2%);

[0005] Insufficient synchronization: if a multiple butterfly plate structure (such as a double eccentric butterfly valve) is used, each butterfly plate needs to be independently driven, and mechanical processing errors or driving system delays can easily cause asynchronous operation, aggravating flow fluctuations;

[0006] Single application scene: after the traditional butterfly valve is opened, the fluid flows symmetrically along the center of the butterfly plate, and eccentric flow (such as special scenes requiring eccentric shear) cannot be realized, and the applicability is limited. SUMMARY

[0007] The first technical problem to be solved by the application is to provide a fan valve with multiple valve cores in concentric distribution and synchronous linkage, which is a new type of fan valve with compact structure, high synchronization and precise flow control. The fan valve adopts a synchronous linkage design of multiple fan-shaped valve cores, reduces the opening and closing resistance, and utilizes the concentric distribution structure to make the flow and the rotation angle more linear, thereby improving the control precision.

[0008] To achieve the above-mentioned purposes, the application adopts the following technical solutions:

[0009] The fan valve of the multi-valve core concentric distribution and synchronous linkage switch comprises a valve body, flanges (upper flange and lower flange) mounted (by bolts or welding) on the upper and lower ends of the valve body and valve cores installed in the valve body. The core improvement points are as follows: it further comprises an annular linkage disc (realizing the rotary motion around the center of the valve body) concentrically arranged (welded) on the outer side of the valve body and rotatably mounted on the lower flange, a plurality of (the number is consistent with the number of fan-shaped valve core pieces, such as 5 or 6) shaft sleeves (which support and guide the fan-shaped valve core) circumferentially distributed on the outer side of the valve body and fixedly connected by the inner side of the valve body, the valve core is equally divided (the central angle of each fan-shaped valve core is 360° / number of pieces, such as 72° for each piece when there are 5 pieces) into a plurality of circumferentially distributed fan-shaped valve cores (as the switching part of the valve body) rotatably mounted in each shaft sleeve through a bearing, and a linkage mechanism (which ensures that all fan-shaped valve cores rotate synchronously when the annular linkage disc rotates) movably connecting each fan-shaped valve core and the same annular linkage disc. Each adjacent two pieces of fan-shaped valve core and the inner wall of the valve body are tightly fitted (the gap is compensated by precise machining or elastic sealing elements). Clockwise rotation of the annular linkage disc can drive all fan-shaped valve cores to rotate around the shaft sleeve to open the valve body (the flow passage cross-sectional area gradually increases from 0), and counterclockwise rotation of the annular linkage disc can drive all fan-shaped valve cores to rotate around the shaft sleeve to close the valve body (the flow passage cross-sectional area gradually decreases from the maximum to 0).

[0010] By adopting the above scheme, the plurality of fan-shaped valve cores of the fan valve are synchronously driven to rotate (without the large-area rotary inertia of a single butterfly plate), and the contact area between the outer arc surface of a single fan-shaped valve core and the inner wall of the valve body is only 1 / 5 of that of a traditional butterfly plate (for example, 5 fan-shaped valve cores). The fluid resistance is reduced by 40%-60% during rotation (in a high-pressure water scene, the opening and closing torque is reduced from 120 N·m of a traditional butterfly valve to 70 N·m). The fan-shaped valve cores are concentrically distributed with the center of the valve body as the axis, the flow passage is regularly combined in a fan shape when opened (the cross-sectional area = θ / 360°×the maximum cross-sectional area of the valve body, θ is the rotation angle), the flow rate and the rotation angle almost tend to be linear (for example, 5 fan-shaped valve cores, the linearity is ≥0.98, and the linearity of a traditional single butterfly valve is only 0.82), and the flow regulation accuracy can be improved.

[0011] As a preferred embodiment of the fan valve of the multi-valve core concentric distribution and synchronous linkage switch, the linkage mechanism comprises a fixed rocker connected (by bolts or welding) to the outer end of the fan-shaped valve core rotating shaft, a fixed connecting rod connected (integrally formed with the annular linkage disc or fixed by bolts) to the upper part of the annular linkage disc, and a telescopic rocker assembly rotatably connected between the fixed rocker and the fixed connecting rod, which allows the telescopic rocker assembly to still transmit rotary force when the fan-shaped valve core moves slightly radially, so as to solve the problem of radial displacement of the fan-shaped valve core caused by machining error or thermal expansion.

[0012] As a preferred embodiment of a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch, the telescopic rocker assembly includes two groups of telescopic sleeves (adjustable range 0-50mm) arranged back to back and coaxially, a universal ball always limited in the end of the telescopic sleeve (allowing local angle deviation ±5°) and a lead screw (pitch 5mm, adjusting the total length by rotating the lead screw, compensating the radial displacement of the fan-shaped valve core).

[0013] As a preferred embodiment of a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch, a mounting hole is provided at 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 the positioning screw inserted into the mounting hole and the positioning nut mounted on the positioning screw, ensuring that the universal ball can swing a small angle around the positioning screw, while limiting the radial deviation of the telescopic sleeve.

[0014] As a preferred embodiment of a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch, it also includes a handle connected to the annular linkage disc and extending outward (fixed by bolts or welded), a guide shaft fixed to the inner end of the handle (integrally formed with the handle or fixed by bolts), and a guide groove concentrically provided on the lower flange plate, wherein the guide shaft is always located in the guide groove, and the shaft body of the guide shaft and the groove wall of the guide groove are in interference fit to limit the rotation of the annular linkage disc along the circular arc track of the guide groove, avoiding deviation; the edge of the guide groove is provided with angle scale lines uniformly distributed from the starting point of the guide groove (fully open position, corresponding to the complete opening of the fan-shaped valve core) to the end of the guide groove (fully closed position, corresponding to the complete closing of the fan-shaped valve core), the range of the angle scale lines is 0-90° (accuracy 0.5°), and the user can directly control the opening angle of the valve by observing the angle scale lines (for example, when the arrow points to the 45° scale line, the valve is opened by 50%).

[0015] As a preferred embodiment of a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch, a plurality of limit guide wheels are installed at the edge of the lower flange plate, which are arranged in a circumferential array and provided with limiting grooves, and the inner circle of the annular linkage disc is simultaneously limited in the limiting grooves (circular arc limiting grooves) of all the limit guide wheels, when the annular linkage disc rotates, the inner circle rolls along the limiting grooves, limiting the radial runout ≤0.2mm, avoiding collision with the valve body or the lower flange plate.

[0016] The second technical problem to be solved by the present application is to provide a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch, which has a compact structure, high synchronization, precise flow control and can realize eccentric flow, and a new type of fan valve, which can always keep one or several fan-shaped valve cores in a closed state by disconnecting the linkage mechanism, realizing eccentric flow when opening / closing the valve body, suitable for special scenes such as eccentric shear, and has a wider application scenario.

[0017] To achieve the above object, the application adopts the following technical scheme:

[0018] On the basis of the above scheme, it further comprises a normally closed plug-in set connected to the outside of the valve body and distributed near each shaft sleeve; through the normally closed plug-in set, a single sector valve core can be self-locked to keep the valve body normally closed. The normally closed plug-in set comprises a normally closed plug sleeve (circular tube structure, fixed on the valve body by welding) parallel to the shaft sleeve and connected to the outside of the valve body, and a normally closed plug pin (ordinary steel plug pin) inserted into the normally closed plug sleeve through the fixed rocker arm, at this time the single sector is in a completely closed state (rotation angle 0°).

[0019] By adopting the above scheme, the fan valve is disconnected from one or several sector valve cores through the disconnection of the linkage mechanism, and the disconnected sector valve core is always kept in a normally closed state, at this time the opening / closing valve body can realize eccentric flow, which is suitable for special scenes requiring eccentric shear (such as a 180° elbow connected after the fan valve), and has a wider application scene.

[0020] The application has the following beneficial effects:

[0021] 1. Small opening / closing resistance: multiple sector valve cores rotate synchronously (without the large-area moment of 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 the traditional butterfly plate (taking 5 sector valve cores as an example), so that the fluid resistance is reduced by 40%-60% (in the actual test of high-pressure water scene, the opening / closing torque is reduced from 120N·m of the traditional butterfly valve to 70N·m).

[0022] 2. High flow control accuracy: the sector valve cores are concentrically distributed with the valve body center as the axis, the flow passage is a regular sector combination when opened (cross-sectional area = θ / 360°×maximum cross-sectional area of the valve body, θ is the rotation angle), and the flow and rotation angle tend to be more linear (linearity ≥0.98, traditional butterfly valve only 0.82), so that the flow regulation accuracy can be realized within ±2% (traditional butterfly valve error ±5%).

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

[0024] 4. Multiple operation convenience: the cooperation of the handle and the guide groove provides intuitive operation guidance (through the rotation angle scale line), avoiding misoperation.

[0025] 5. Expansion of application scenarios: By adjusting the number and central angle of the fan-shaped valve core (such as 6 fan-shaped valve cores, each with a central angle of 60°), it can be flexibly adapted to fluid pipelines of different diameters; at the same time, the coordinated action of multiple fan-shaped valve cores can reduce fluid vortexes (compared with the single vortex of the traditional butterfly plate, the vortex intensity of this structure is reduced by 50%), which is suitable for scenarios with high requirements for fluid stability (such as precision instrument liquid supply systems).

[0026] 6. Application in special scenarios: By disconnecting the linkage mechanism from one or more fan-shaped valve cores, the disconnected fan-shaped valve core will always remain in a normally closed state. At this time, eccentric flow can be achieved when opening / closing the valve body. It is suitable for special scenarios that require eccentric shearing (such as a 180° elbow connected to the fan valve), and its application scenarios are wider. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a three-dimensional structure of a fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close. Figure 1 ;

[0029] Figure 2 It is a three-dimensional structure of a fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close. Figure 2 ;

[0030] Figure 3 This is the main view of a fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close;

[0031] Figure 4 A top view of a fan valve with multiple valve cores concentrically distributed and switched synchronously;

[0032] Figure 5 for Figure 1 A three-dimensional structural diagram of all the fan-shaped valve cores being synchronously linked;

[0033] Figure 6 for Figure 5 A local enlarged view of the area within the middle dashed line;

[0034] Figure 7 for Figure 6 A three-dimensional structural diagram of the telescopic rocker assembly;

[0035] Figure 8 for Figure 1 The three-dimensional structure diagram of the central sector valve core when it is self-locking;

[0036] Figure 9 For Figure 8 local enlarged view in the area of the dashed line;

[0037] Figure 10 For Figure 1 schematic diagram of the front view structure of the partial fan-shaped valve core being self-locked and applied to eccentric flow;

[0038] Figure 11 For Figure 1 schematic diagram of the top view structure of the partial fan-shaped valve core being self-locked and applied to eccentric flow;

[0039] In the figure, the marks are as follows: 1-valve body; 2-flange plate; 3-ring linkage plate; 4-shaft sleeve; 5-fan-shaped valve core; 6-linkage mechanism; 61-fixed rocker arm; 62-fixed connecting rod; 63-telescopic rocker assembly; 631-telescopic sleeve; 632-gimbal ball; 633-screw rod; 64-positioning screw; 65-positioning nut; 7-rotary handle; 8-guide shaft; 9-guide groove; 10-limiting guide wheel; 11-constant-off plug-in set; 111-constant-off plug-in sleeve; 112-constant-off plug pin; 12-180° elbow. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0041] Embodiment one, as Figures 1 to 5As shown, a fan valve with multiple valve cores concentrically distributed and synchronous linkage switch is provided as a valve for realizing switch or flow regulation, which specifically comprises a valve body 1 (cylindrical cavity), flanges 2 (upper flange, lower flange) mounted (welded) on the upper and lower ends of the valve body 1, and valve cores installed in the valve body 1; the core improvement points are as follows: it further comprises an annular linkage disc 3 (realizing rotational motion around the center of the valve body 1) concentrically arranged (welded) on the outer side of the valve body 1 and rotationally mounted on the lower flange 2, five (the number is consistent with the number of fan-shaped valve cores 5) shaft sleeves 4 (supporting and guiding the fan-shaped valve cores 5) circumferentially distributed on the outer side of the valve body 1 and fixedly connected by the inner side of the valve body 1, five fan-shaped valve cores 5 (as the switch part of the valve body 1) equally divided by the valve core five (each fan-shaped valve core 5 has a central angle of 72°) and rotationally mounted in each shaft sleeve 4 through a bearing, and a linkage mechanism 6 (ensuring that when the annular linkage disc 3 rotates, all fan-shaped valve cores 5 rotate synchronously) movably connecting each fan-shaped valve core 5 and the same annular linkage disc 3; each two adjacent fan-shaped valve cores 5 and the inner wall of the valve body 1 are tightly fitted (0.1mm gap is reserved during processing, and sealing is realized by cooperating with a nitrile rubber ring), ensuring zero leakage (leakage ≤0.01mL / min) in full-closed state; clockwise rotation of the annular linkage disc 3 can drive all fan-shaped valve cores 5 to rotate around the shaft sleeve 4 to open the valve body 1 (the flow passage cross-sectional area gradually increases from 0), and counterclockwise rotation of the annular linkage disc 3 can drive all fan-shaped valve cores 5 to rotate around the shaft sleeve 4 to close the valve body 1 (the flow passage cross-sectional area gradually decreases from the maximum to 0). The five fan-shaped valve cores 5 of the fan valve are synchronously driven to rotate (without large-area rotational inertia of a single butterfly plate), and the contact area between the outer arc surface of a single fan-shaped valve core 5 and the inner wall of the valve body 1 is only 1 / 5 of that of a traditional butterfly plate, and the fluid resistance is reduced by 40%-60% during rotation (in a high-pressure water scene, the opening and closing torque is reduced from 120N·m of a traditional butterfly valve to 70N·m); the fan-shaped valve cores 5 are concentrically distributed with the center of the valve body 1 as the axis, the flow passage is regularly combined in the open state (cross-sectional area = θ / 360° × maximum cross-sectional area of the valve body 1, θ is the rotation angle), and the flow rate and the rotation angle almost tend to be linear (for example, the linearity of five fan-shaped valve cores 5 is ≥0.98, and that of a traditional single butterfly valve is only 0.82), which can improve the flow regulation accuracy.

[0042] As shown in Figure 6 The linkage mechanism 6 comprises a fixed rocker arm 61 fixedly connected (by bolts) to the outer end of the rotating shaft of the fan-shaped valve core 5, a fixed connecting rod 62 fixedly connected (by bolts) above the annular linkage disc 3, and a telescopic rocker assembly 63 rotationally connecting the fixed rocker arm 61 and the fixed connecting rod 62, allowing the telescopic rocker assembly 63 to still transmit rotary force when the fan-shaped valve core 5 moves radially slightly, so as to solve the problem of radial displacement of the fan-shaped valve core 5 caused by machining error or thermal expansion.

[0043] AsFigure 7 As shown, the telescopic rocker assembly includes two groups of telescopic sleeves 631 (adjustable range of 0-50mm in length) arranged coaxially and oppositely, universal balls 632 (allowing partial angular deviation of ±5°) always limited in the end of the telescopic sleeves 631, and a lead screw 633 (screw pitch of 5mm) coaxially connecting the two groups of telescopic sleeves 631, which can adjust the total length by rotating the lead screw 633 to compensate for the radial displacement of the sector valve core 5.

[0044] As shown, Figures 6 to 7 The center of the universal ball 632 is provided with a mounting hole; the ends of the two groups of telescopic sleeves 631 are connected with the fixed rocker arm 61 and the fixed connecting rod 62 respectively through the positioning screw 64 inserted into the mounting hole and the positioning nut 65 mounted on the positioning screw 64, which ensures that the universal ball 632 can swing by a small angle around the positioning screw 64, while limiting the radial deviation of the telescopic sleeve 631.

[0045] As shown, Figures 3 to 4 It also includes a steering handle 7 connected (by bolt) to the annular linkage disc 3 and extending outward, a guide shaft 8 fixed (by bolt) to the inner end of the steering handle 7, and a guide groove 9 concentrically provided on the lower flange plate 2, wherein 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 in interference fit to limit the annular linkage disc 3 to rotate only along the circular arc track of the guide groove 9, avoiding deviation; the edge of the guide groove 9 is provided with evenly distributed corner scale lines from the starting point of the guide groove 9 (fully open position, corresponding to the sector valve core 5 fully open) to the end of the guide groove 9 (fully closed position, corresponding to the sector valve core 5 fully closed), the range of the corner scale lines is 0-90° (accuracy 0.5°), and the user can directly control the valve opening angle by observing the angle scale lines (for example, when the arrow points to the 45° scale line, the valve is opened by 50%).

[0046] As shown, Figures 3 to 4 The edge of the lower flange plate 2 is rotatably installed with multiple circumferentially arrayed limiting guide wheels 10 provided with limiting grooves, and the inner circle of the annular linkage disc 3 is simultaneously limited in the limiting grooves (circular arc limiting grooves) of all the limiting guide wheels 10, when the annular linkage disc 3 rotates, its inner circle rolls along the limiting grooves, limiting the radial runout ≤0.2mm, avoiding collision with the valve body 1 or the lower flange plate 2.

[0047] Working process of the sector valve with multiple valve cores concentrically distributed and synchronously linked:

[0048] Open the valve (fully open): Rotate the handle 7 clockwise, and the handle 7 moves along the 0°→90° direction of the guide groove 9 through the guide shaft 8, driving the annular linkage disk 3 to rotate synchronously clockwise. The annular linkage disk 3 pulls all the fixed rocker arms 61 to rotate synchronously clockwise through the fixed connecting rod 62 and the telescopic rocker assembly 63, thereby driving the fan-shaped valve core 5 to rotate clockwise around the shaft sleeve 4. The gap between adjacent fan-shaped 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 is aligned with the 90° scale line of the guide groove 9, the fan-shaped valve core 5 rotates to the maximum open position (fully open).

[0049] Close the valve (fully closed): rotate the handle 7 counterclockwise. Similarly, the annular linkage disk 3 drives the fan-shaped valve to rotate counterclockwise, and the gap gradually decreases until it is closed (fully closed). When the arrow on the handle 7 is aligned with the 0° scale line of the guide groove 9, the fan-shaped valve core 5 rotates to the closed position (fully closed).

[0050] Intermediate state adjustment (such as half-open): If you need to maintain a 50% opening (rotation angle of 45°), when the arrow on the rotating handle 7 is aligned with the 45° scale line of the guide groove 9, the fan-shaped valve core 5 is at a 50% opening (half-open).

[0051] Example 2, as Figures 8 to 11 As shown, the only difference between this embodiment and the first embodiment is that, based on the first embodiment, it also includes a normally closed plug-in group 11 connected to the outside of the valve body 1 and distributed near each sleeve 4; the normally closed plug-in group 11 can self-lock the single fan-shaped valve core 5 to keep the valve body 1 normally closed. The normally closed plug-in group 11 includes a normally closed plug-in sleeve 111 (a circular tubular structure, fixed to the valve body 1 by welding) parallel to the sleeve 4 and connected to the outside of the valve body 1, and a normally closed latch 112 (ordinary steel latch) inserted into the normally closed plug-in sleeve 111 through the fixed rocker arm 61. At this time, the single fan-shaped valve core is in a fully closed state (rotation angle 0°). By disconnecting the linkage mechanism 6 from one or more fan-shaped valve cores 5, the disconnected fan-shaped 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. It is suitable for special scenarios where eccentric shearing is required (a bend with a 180° angle is connected after the fan valve), and its application scenarios are wider.

[0052] continue Figures 10 to 11As shown, the multi-valve core concentric distribution and synchronous linkage switch fan valve concentric installation on 180 ° elbow 12, where close to the elbow outer ring (right) 2 fan-shaped valve core 5 in the normal closed state (with linkage mechanism 6 disconnected, and using the normal closed plug-in set 11 to self-lock), where close to the elbow inner ring (left) 3 fan-shaped valve core 5 in the normal linkage state (with linkage mechanism 6 remains connected), in use, eccentric flow mode, using linkage mechanism 6 at the same time 3 fan-shaped valve core 5 (left) open, the centrifugal force of the fluid at this time is small, its shear impact on 180 ° elbow 12 is reduced, can prolong the service life of 180 ° elbow 12.

[0053] The above is only the preferred embodiment of the present application, and is not intended to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close, comprising a valve body, flanges mounted on the upper and lower ends of the valve body, and a valve core mounted within the valve body; Its characteristics are: The valve body is provided with an annular linkage disk concentrically arranged on the outside of the valve body and rotatably mounted on the lower flange, a plurality of shaft sleeves circumferentially distributed on the outside of the valve body and connected and fixed from the outside of the valve body to the inside of the valve body, a valve core is divided into a plurality of circumferentially distributed sector valve cores rotatably mounted in each of the shaft sleeves, and a linkage mechanism movably connecting each sector valve core to the same annular linkage disk; Each adjacent two fan-shaped valve cores and the fan-shaped valve core and the inner wall of the valve body are tightly fitted; Rotating the annular linkage disk clockwise can drive all the fan-shaped valve cores to rotate around the shaft sleeve to open the valve body, and rotating the annular linkage disk counterclockwise can drive all the fan-shaped valve cores to rotate around the shaft sleeve to close the valve body.

2. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 1 is characterized by: The linkage mechanism includes a fixed rocker arm fixedly connected to the outer end of the fan-shaped valve core shaft, a fixed connecting rod fixedly connected above the annular linkage disk, and a telescopic rocker assembly that rotatably connects the fixed rocker arm and the fixed connecting rod.

3. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 2 is characterized by: The telescopic rocker assembly includes two sets of telescopic sleeves that are arranged coaxially and facing each other, a universal ball that is always limited and rotated in the end of the telescopic sleeve, and a screw rod that coaxially connects the two sets of telescopic sleeves.

4. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 3 is characterized by: An assembly hole is provided at the center of the universal ball; the ends of the two sets of telescopic sleeves are connected to the fixed rocker arm and the fixed connecting rod respectively through positioning screws inserted into the assembly holes and positioning nuts installed on the positioning screws.

5. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 1 is characterized in that: It also includes a handle connected to the annular linkage disk and extending outward, a guide shaft fixed to the inner end of the handle, and a guide groove coaxially opened on the lower flange; wherein the guide shaft is always located on the guide groove.

6. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 5 is characterized by: There is interference fit between the guide shaft body and the guide groove wall.

7. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 5 is characterized by: The guide groove is provided with angle scale lines evenly distributed from the starting point of the guide groove to the end point of the guide groove along the edge of the groove, and the range of the angle scale lines is 0-90 degrees.

8. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 1 is characterized by: A plurality of limiting guide wheels distributed in a circumferential array and having limiting grooves are rotatably installed on the edge of the lower flange, and the inner ring of the annular linkage disk is simultaneously limited in the limiting grooves of all the limiting guide wheels.

9. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to any one of claims 1 to 8, characterized in that: It also includes a normally closed plug-in group connected to the outside of the valve body and distributed near each shaft sleeve; the normally closed plug-in group can self-lock a single fan-shaped valve core to keep the valve body normally closed.

10. The fan valve with multiple valve cores concentrically distributed and synchronously linked to open and close according to claim 9, characterized in that: The normally closed plug-in assembly includes a normally closed plug-in sleeve parallel to the shaft sleeve and connected to the outside of the valve body, and a normally closed latch passing through the fixed rocker arm and inserted into the normally closed plug-in sleeve. At this time, a single sector is in a fully closed state.

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