Isolation valve

Abstract

The isolating valve comprises a frame structure, a driving rotating shaft, a blade structure, a transmission structure and a driving portion, the frame structure is provided with a valve port, the driving rotating shaft drives the blade structure to rotate, the blade structure is used for opening and closing the valve port, and a driving shaft of the driving portion, an input end of the transmission structure, an output end of the transmission structure and the driving rotating shaft are sequentially connected. Due to the fact that the transmission ratio of the input end to the output end is smaller than 1, the rotation angle of the driving shaft is larger than the original rotation angle after the rotation angle of the driving shaft is transmitted through the transmission structure, that is, the movement of the driving shaft is amplified through the transmission structure, and the blade structure can rotate when finally moving to the valve opening opening position. Deviation caused by error accumulation can be eliminated, so that it is ensured that the blade structure can accurately rotate to the opening position for opening the valve port, and the phenomenon that the blade structure does not rotate in place and generates resistance to flowing of wind is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve technical field, specifically, relate to a kind of isolation valves. BACKGROUND

[0002] The rotation angle of the drive part matched with the isolation valve (also called electrically operated air valve) used in nuclear power plant is fixed, the fixed angle is rotated by the driving shaft of the drive part, and the angular displacement is generated by the blade structure through transmission assembly, and then the valve port is opened or closed.

[0003] In actual production, the valve port of the isolation valve needs to be well sealed when closing, so the position of the driving shaft when the blade structure completely closes the valve port is taken as the starting position of the driving shaft rotation during design and installation, so that the valve port is completely closed when the driving shaft is in the starting position.

[0004] In design, the blade structure should also rotate the fixed angle and reach the position of the valve port completely opening after the driving shaft rotates the fixed angle from the starting position. However, there are inevitable errors in the machining and assembly of each part in the transmission assembly, and greater cumulative errors will be generated, which leads to that the actual rotation angle of the blade structure is smaller after the driving shaft of the drive part rotates the fixed angle, that is, the blade structure fails to rotate to the position of the valve port completely opening, so that the blade structure will generate resistance to the flow of wind, and then reduce economic benefits. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of isolation valve to solve the problem that the blade structure of isolation valve in prior art is not rotated to position when opening valve port.

[0006] In order to solve the above problems, the utility model provides an isolation valve, comprising a frame structure, a driving shaft, a blade structure, a transmission structure and a drive part, the frame structure has a valve port, the driving shaft drives the blade structure to rotate, the blade structure has a closing position for closing the valve port and an opening position for opening the valve port; the driving shaft of the drive part, the input end of the transmission structure, the output end of the transmission structure and the driving shaft are connected in sequence, and the transmission ratio of the input end and the output end is less than 1; the blade structure is located at the closing position under the condition that the driving shaft is located at the set starting position, and the isolation valve eliminates cumulative error through the transmission structure, so that the blade structure rotates to the opening position under the condition that the driving shaft rotates from the starting position to the set rotation position.

[0007] Further, the transmission structure is a connecting rod mechanism, the input end of the transmission structure is connected with the driving shaft, and the output end of the transmission structure is connected with the driving shaft.

[0008] Further, the transmission structure comprises a first connecting rod, a second connecting rod and a third connecting rod, one end of the first connecting rod is fixedly connected with the driving shaft, the other end of the first connecting rod is hingedly connected with one end of the second connecting rod at point A, the other end of the second connecting rod is hingedly connected with one end of the third connecting rod at point B, and the other end of the third connecting rod is fixedly connected with the driving shaft; wherein the distance between the rotation center line of the driving shaft and point A is L1, the distance between the rotation center line of the driving shaft and point B is L2, and L1>L2.

[0009] Further, the transmission structure comprises a driving gear and a driven gear, the driving gear is installed on the driving shaft, the driven gear is installed on the driving shaft, the driving gear and the driven gear are engaged, and the number of teeth of the driving gear is greater than that of the driven gear.

[0010] Or, the transmission structure comprises a synchronous belt, a driving synchronous wheel and a driven synchronous wheel, the driving synchronous wheel is installed on the driving shaft, the driven synchronous wheel is installed on the driving shaft, the driving synchronous wheel and the driven synchronous wheel are engaged with the synchronous belt, and the number of teeth of the driving synchronous wheel is greater than that of the driven synchronous wheel.

[0011] Or, the transmission structure comprises a chain, a driving sprocket and a driven sprocket, the driving sprocket is installed on the driving shaft, the driven sprocket is installed on the driving shaft, the driving sprocket and the driven sprocket are engaged with the chain, and the number of teeth of the driving sprocket is greater than that of the driven sprocket.

[0012] Further, the driving part is an angular stroke actuator, and when the driving shaft rotates from the starting position to the rotating position, the rotation angle of the driving shaft is 90 degrees, and the rotation angle of the driving shaft is 95 degrees to 100 degrees.

[0013] Further, the blade structure comprises N sub-blades, the valve port comprises N sub-openings, N≥2, and each sub-blade is used for opening and closing one sub-opening; the isolation valve further comprises a linkage structure, the driving shaft and the linkage structure cooperate, and the driving shaft and the linkage structure drive the N sub-blades to rotate synchronously to synchronously open and close the N sub-openings.

[0014] Further, the N sub-blades comprise one driving blade and N-1 driven blades, the linkage structure comprises a transmission assembly and N-1 driven shafts, and the driven shafts are rotationally arranged in the frame structure; wherein the driving blade is installed on the driving shaft, each driven blade is installed on one driven shaft, the driving shaft is drivingly connected with the transmission assembly, the transmission assembly is drivingly connected with the N-1 driven shafts, and the driving shaft drives the N-1 driven shafts to rotate synchronously through the transmission assembly.

[0015] Further, the transmission assembly comprises a transmission rod and N rotation arms arranged in parallel, the driving shaft is fixedly connected with a first end of one rotation arm, each driven shaft is fixedly connected with a first end of one rotation arm, and second ends of the N rotation arms are hingedly connected with the transmission rod.

[0016] Further, the isolation valve further comprises a sealing structure, the sealing structure is arranged on the frame structure and / or the blade structure, and when the blade structure is in the closed position, the sealing structure is clamped between the periphery of the valve port and the periphery of the blade structure.

[0017] Further, the blade structure comprises N sub-blades arranged side by side, the valve port comprises N sub-openings, N≥2, each sub-blade is used for opening and closing one sub-opening respectively; the frame structure comprises an outer frame and N-1 beams, N sub-openings are formed between the outer frame and the N-1 beams, and the sealing structure comprises sealing rubber strips arranged on the outer frame and the beams, and when the blade structure is in the closed position, the periphery of each sub-blade abuts against the corresponding sealing rubber strip.

[0018] The technical scheme of the utility model, through the driving shaft of the driving part, the input end of the transmission structure, the output end of the transmission structure and the driving shaft are connected in turn, because the transmission ratio of the input end and the output end is less than 1, the rotation angle of the driving shaft is transmitted through the transmission structure, so that the rotation angle of the driving shaft is greater than the original rotation angle, that is, the movement of the driving shaft is amplified through the transmission structure, so that the blade structure can eliminate the deviation caused by error accumulation when moving to the open position of the valve port, so as to ensure that the blade structure can be accurately rotated to the open position of the valve port. Due to the amplification effect of the transmission structure, the angle change of the blade structure is adjusted after a certain adjustment, so that the blade structure can be accurately rotated to the predetermined position each time, and the opening of the valve port can be executed according to the requirements. Moreover, by eliminating the cumulative error, the loss caused by error accumulation is reduced, the burden of each transmission component is reduced, the service life of each component can be prolonged, and the stability of the entire isolation valve can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application, serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0020] Figure 1 A structure schematic view of the isolation valve provided by the embodiment of the present application is shown;

[0021] Figure 2 A structure schematic view of the transmission structure in the isolation valve provided by the embodiment of the present application is shown;

[0022] Figure 3 A structure schematic view of the linkage structure in the isolation valve provided by the embodiment of the present application is shown;

[0023] Figure 4A structure schematic view of the blade structure in the isolation valve provided by the embodiment of the utility model is shown in the opening position;

[0024] Figure 5 A structure schematic view of the blade structure in the isolation valve provided by the embodiment of the utility model is shown in the closing position.

[0025] Among them, the above-mentioned drawing includes the following figure marks:

[0026] 10, frame structure;

[0027] 11, valve port; 111, sub opening;

[0028] 20, driving shaft;

[0029] 30, blade structure;

[0030] 31, sub blade; 311, driving blade; 312, driven blade;

[0031] 40, transmission structure;

[0032] 41, first connecting rod; 42, second connecting rod; 43, third connecting rod;

[0033] 50, driving part;

[0034] 51, driving shaft;

[0035] 60, linkage structure;

[0036] 61, transmission rod; 62, rotating arm; 63, driven shaft;

[0037] 70, sealing structure;

[0038] 71, sealing rubber strip. DETAILED DESCRIPTION

[0039] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0040] As Figures 1 to 5The utility model discloses an embodiment provides a kind of isolation valves, including frame structure 10, driving shaft 20, blade structure 30, transmission structure 40 and drive part 50, frame structure 10 has valve port 11, driving shaft 20 drives blade structure 30 rotation, blade structure 30 has the closing position of closing valve port 11 and the opening position of opening valve port 11;The input end of drive shaft 51 of drive part 50, transmission structure 40, the output end of transmission structure 40 and driving shaft 20 are sequentially connected, and the transmission ratio of input end and output end is less than 1;Blade structure 30 is located in the closing position in the case where driving shaft 51 is located in the set starting position, and the isolation valve eliminates accumulated error by transmission structure 40, so that blade structure 30 rotates to the opening position in the case where driving shaft 51 rotates from starting position to the set rotating position.

[0041] In the embodiment, the input shaft of drive shaft 51 of drive part 50, transmission structure 40, the output shaft of transmission structure 40 and driving shaft 20 are sequentially connected, and since the transmission ratio of input end and output end is less than 1, the rotation angle of driving shaft 51 is transmitted after the transmission of transmission structure 40, so that the rotation angle of driving shaft 20 is greater than the original rotation angle, i.e. the movement of driving shaft 51 is amplified by transmission structure, so that blade structure 30 can eliminate the deviation caused by the error accumulation of production and assembly when finally moving to the opening position of valve port 11, so as to ensure that blade structure 30 can accurately rotate to the opening position of opening valve port. Due to the amplification effect of transmission structure 40, the angle change of blade structure 30 can ensure that blade structure 30 can accurately rotate to the predetermined position each time, and ensure that the opening of valve port 11 can be executed according to the requirements. Moreover, by eliminating the accumulated error in transmission process, the loss caused by error accumulation is reduced, the burden of each transmission component is reduced, the service life of each component can be prolonged, and the stability of the whole isolation valve can be improved.

[0042] Specifically, the designed rotation angle of blade structure 30 from the closing position of closing valve port 11 to the opening position of opening valve port 11 is θ;In the case where driving shaft 51 rotates from starting position to rotating position, the rotation angle of driving shaft 51 is also θ, and after the transmission of transmission structure 40, due to the amplification effect of transmission structure 40, the rotation angle of driving shaft 20 is greater than θ, and the increased rotation angle of driving shaft 20 offsets the reduced rotation angle of blade structure 30 due to accumulated error, so that blade structure 30 can rotate θ, i.e. blade structure 30 can rotate to the opening position of completely opening valve port 11.

[0043] The reduction in the rotation angle of the blade structure 30 due to the cumulative error in the transmission process when the valve port 11 is opened can be obtained by test; the specific angle by which the rotation angle of the active shaft 20 increases relative to θ after being transmitted by the transmission structure 40 can also be obtained, so that the specific transmission ratio of the transmission structure 40 can be designed.

[0044] like Figure 2 As shown, the transmission structure 40 is a linkage mechanism. The input end of the transmission structure 40 is connected to the drive shaft 51, and the output end of the transmission structure 40 is connected to the drive shaft 20.

[0045] In this embodiment, a linkage mechanism is used for transmission, which is simple in structure and easy to manufacture and assemble. Specifically, when the transmission ratio between the input and output ends is less than 1, although the angle at the input end is small, the angle at the output end is amplified. This means that when the input end rotates a fixed angle, the output end can rotate a larger angle than the input end.

[0046] In the transmission structure 40, a transmission ratio less than 1 means that when the drive shaft 51 rotates one revolution, the rotation angle of the active shaft 20 is greater than the rotation angle of the drive shaft 51. This amplifies the rotation angle of the active shaft 20, ensuring that the blade structure 30 can be in the open or closed position as required. Moreover, the linkage mechanism is usually compact, which can optimize the spatial layout and make the overall design of the isolation valve more compact, effectively saving space and reducing the complexity of the isolation valve.

[0047] Specifically, the transmission structure 40 includes a first connecting rod 41, a second connecting rod 42, and a third connecting rod 43. One end of the first connecting rod 41 is fixedly connected to the drive shaft 51. The other end of the first connecting rod 41 and one end of the second connecting rod 42 are hinged at point A. The other end of the second connecting rod 42 and one end of the third connecting rod 43 are hinged at point B. The other end of the third connecting rod 43 is fixedly connected to the drive shaft 20. The distance between the rotation center line of the drive shaft 51 and point A is L1, and the distance between the rotation center line of the drive shaft 20 and point B is L2, where L1 > L2.

[0048] In this embodiment, the distance between the rotation center line of the drive shaft 51 and point A is L1, and the distance between the rotation center line of the active shaft 20 and point B is L2. When L1 > L2, the rotation angle of the active shaft 20 is amplified during the transmission process. Specifically, the rotation of the drive shaft 51 amplifies the rotation angle of the active shaft 20 through the transmission structure 40, effectively reducing the situation where the blade structure 30 does not rotate in place due to error accumulation, and ensuring that the valve port 11 can be fully opened.

[0049] Furthermore, in an example not shown, the transmission structure 40 includes a driving gear and a driven gear. The driving gear is mounted on the drive shaft 51, and the driven gear is mounted on the driving shaft 20. The driving gear and the driven gear mesh, and the number of teeth on the driving gear is greater than the number of teeth on the driven gear.

[0050] The transmission structure 40 includes a driving gear and a driven gear. Since the number of teeth of the driving gear is greater than the number of teeth of the driven gear, when the drive shaft 51 rotates at a fixed angle, the transmission is transmitted to the driving shaft 20 through the gear. The angle of rotation of the driving shaft 20 will be greater than the angle of rotation of the drive shaft 51. This can prevent the blade structure 30 from not rotating into place and can also make the movement of the drive shaft 51 more flexible and efficient.

[0051] Alternatively, in an example not shown, the transmission structure 40 includes a timing belt, a driving timing pulley, and a driven timing pulley. The driving timing pulley is mounted on the drive shaft 51, and the driven timing pulley is mounted on the driving shaft 20. Both the driving and driven timing pulleys mesh with the timing belt, and the number of teeth on the driving timing pulley is greater than the number of teeth on the driven timing pulley.

[0052] The transmission structure 40 includes a synchronous belt, a driving synchronous pulley, and a driven synchronous pulley. The driving synchronous pulley has more teeth than the driven synchronous pulley. This ensures that for every revolution of the driving synchronous pulley, the driven synchronous pulley rotates at a greater angle than the driving synchronous pulley, preventing the blade structure 30 from not rotating into its correct position. Furthermore, the synchronous belt transmission features high precision and no slippage, ensuring accurate meshing between the synchronous pulley and the synchronous belt, thus avoiding the accumulation of errors that may occur during transmission.

[0053] Alternatively, in an example not shown, the transmission structure 40 includes a chain, a driving sprocket, and a driven sprocket. The driving sprocket is mounted on the drive shaft 51, and the driven sprocket is mounted on the driving shaft 20. Both the driving sprocket and the driven sprocket mesh with the chain, and the number of teeth on the driving sprocket is greater than the number of teeth on the driven sprocket.

[0054] The transmission structure 40 includes a chain, a driving sprocket, and a driven sprocket. When the number of teeth on the driving sprocket is greater than the number of teeth on the driven sprocket, when the driving sprocket rotates at a fixed angle, the driven sprocket will rotate at an angle greater than the driving sprocket. This can prevent the blade structure 30 from not rotating to its correct position. Moreover, the chain drive has high transmission efficiency, and the meshing between the chain and the sprocket is relatively stable under heavy loads.

[0055] like Figure 1 As shown, the drive unit 50 specifically adopts an angular stroke actuator. When the drive shaft 51 rotates from the starting position to the rotating position, the rotation angle of the drive shaft 51 is 90 degrees, and the rotation angle of the drive shaft 20 is 95 to 100 degrees.

[0056] In the embodiment, when the driving shaft 51 rotates from the starting position to the rotating position, the driving shaft 51 rotates 90 degrees, but the accumulated error in the transmission process in the prior structure can cause the actual rotating angle of the blade structure 30 to be 5-10 degrees smaller, thus, through the amplification of the transmission structure 40, the rotating angle of the driving rotating shaft 20 reaches 95-100 degrees, which can eliminate the accumulated error and ensure that the blade structure 30 can reach the correct movement position.

[0057] As shown in Figure 3 and Figure 4 , the blade structure 30 includes N sub-blades 31, the valve port 11 includes N sub-openings 111, N≥2, each sub-blade 31 is used to open and close one sub-opening 111; the isolation valve further includes a linkage structure 60, the driving rotating shaft 20 cooperates with the linkage structure 60, and the driving rotating shaft 20 and the linkage structure 60 drive the N sub-blades 31 to rotate synchronously to open and close the N sub-openings 111 synchronously.

[0058] In the embodiment, since the valve port 11 includes multiple sub-openings 111, and each sub-blade 31 can open and close one sub-opening 111 through the cooperation of the linkage structure 60 and the driving rotating shaft 20, all the sub-openings 111 can be opened and closed synchronously, which ensures that the opening and closing degrees of each sub-opening 111 are consistent and effectively avoids the unevenness of each sub-opening 111 when opening or closing.

[0059] As shown in Figure 3 , the N sub-blades 31 include one driving blade 311 and N-1 driven blades 312, the linkage structure 60 includes a transmission assembly and N-1 driven rotating shafts 63, and the driven rotating shaft 63 is rotatably arranged in the frame structure 10; wherein the driving blade 311 is installed on the driving rotating shaft 20, each driven blade 312 is installed on one driven rotating shaft 63, the driving rotating shaft 20 is drivingly connected with the transmission assembly, the transmission assembly is drivingly connected with the N-1 driven rotating shafts 63, and the driving rotating shaft 20 drives the N-1 driven rotating shafts 63 to rotate synchronously through the transmission assembly.

[0060] In the embodiment, by arranging the driving blade 311 and the multiple driven blades 312 and realizing the synchronous rotation of the driving blade 311 and the driven blades 312 through the transmission assembly and the driven rotating shaft 63, the opening and closing actions of the multiple sub-blades 31 can be ensured to be completely consistent, thereby ensuring the accuracy of the valve port 11 control.

[0061] As shown in Figure 4 and Figure 5 , the transmission assembly includes a transmission rod 61 and N parallelly arranged rotating arms 62, the driving rotating shaft 20 and a first end of one rotating arm 62 are fixedly connected, each driven rotating shaft 63 is fixedly connected with a first end of one rotating arm 62, and second ends of the N rotating arms 62 are hingedly connected with the transmission rod 61.

[0062] In the embodiment, by using the plurality of parallel arranged rotating arms 62 and transmission rods 61, it can ensure that the rotation of the driving shaft 20 can be effectively transmitted to each driven shaft 63 through the transmission assembly, and then make all the sub-blades 31 rotate synchronously, ensure that the opening and closing actions of all the sub-blades 31 are completely consistent, and can open and close all the sub-openings 111. Moreover, using the plurality of rotating arms 62 makes the transmission process more stable and the synchronization stronger.

[0063] As shown in Figure 5 , the isolation valve further comprises a sealing structure 70, which is arranged on the frame structure 10 and / or the blade structure 30, and when the blade structure 30 is in the closed position, the sealing structure 70 is clamped between the periphery of the valve port 11 and the periphery of the blade structure 30.

[0064] In the embodiment, by clamping between the periphery of the valve port 11 and the periphery of the blade structure 30, the sealing structure 70 can ensure that a seal is formed between the valve port 11 and the blade structure 30, and when the blade structure 30 is in the closed position, the sealing structure 70 can completely seal the valve port 11 to prevent gas leakage, thereby achieving a zero-leakage sealing effect. Moreover, the sealing structure 70 can also reduce the friction between the blade structure 30 and the valve port 11, prolonging the service life.

[0065] As shown in Figure 5 , the blade structure 30 comprises N sub-blades 31 arranged side by side, the valve port 11 comprises N sub-openings 111, N≥2, each sub-blade 31 is used to open and close one sub-opening 111; the frame structure 10 comprises an outer frame and N-1 cross beams, and N-1 sub-openings 111 are formed between the outer frame and the N-1 cross beams; the sealing structure 70 comprises sealing rubber strips 71 arranged on the outer frame and the cross beams, and when the blade structure 30 is in the closed position, the periphery of each sub-blade 31 abuts against the corresponding sealing rubber strip 71.

[0066] In the embodiment, the sealing rubber strip 71 as an elastic sealing element can provide sufficient pressure to ensure that a firm seal is formed between the blade structure 30 and the frame structure 10, preventing gas from leaking through the sub-openings 111 of the valve port 11, and the close contact between the periphery of each sub-blade 31 and the sealing rubber strip 71 can effectively avoid leakage when the valve port 11 is closed. Moreover, the sealing contact between the sealing rubber strip 71 and the periphery of the sub-blade 31 when the blade structure 30 is closed can also effectively reduce the noise and vibration of the isolation valve.

[0067] The isolation valve provided by the application, through the design of the transmission structure 40, increases the rotation angle of the driving shaft 20, thereby effectively eliminating accumulated errors, ensuring that the blade structure 30 is accurately positioned during the closing process, and improving the reliability of the isolation valve. In addition, by adopting different types of transmission structures 40, such as gear transmission, synchronous belt transmission or chain transmission, different working environments and requirements can be adapted to, improving the applicability and reliability of the isolation valve.

[0068] The above only describes optional embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0069] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0070] Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments are not meant to limit the scope of the present application. It should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of description. Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification when appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0071] In the description of this solution, it needs to be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the solution and simplifying the description, and do not indicate and imply that the devices or elements indicated must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the protection scope of the solution; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself. For the convenience of description, spatial relative terms such as "on", "above", "upper surface", "upper" and the like can be used here to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "on" other devices or structures will be positioned "below" or "under" other devices or structures. Therefore, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0072] In addition, it needs to be pointed out that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore cannot be understood as a limitation on the protection scope of the solution.

Claims

1. An isolating valve, characterized in that The isolation valve comprises a frame structure (10), a driving shaft (20), a vane structure (30), a transmission structure (40) and a driving part (50), the frame structure (10) has a valve port (11), the driving shaft (20) drives the vane structure (30) to rotate, the vane structure (30) has a closed position for closing the valve port (11) and an open position for opening the valve port (11); the driving shaft (51) of the driving part (50), the input end of the transmission structure (40), the output end of the transmission structure (40) and the driving shaft (20) are sequentially connected, and the transmission ratio of the input end and the output end is less than 1; In the case that the driving shaft (51) is located at a set starting position, the vane structure (30) is located at the closed position, and the isolation valve eliminates accumulated errors through the transmission structure (40) so that, in the case that the driving shaft (51) rotates from the starting position to a set rotating position, the vane structure (30) rotates to the open position.

2. The isolating valve according to claim 1, characterized in that The transmission structure (40) is a connecting rod mechanism, the input end of the transmission structure (40) is connected with the driving shaft (51), and the output end of the transmission structure (40) is connected with the driving shaft (20).

3. The isolating valve according to claim 2, characterized in that The transmission structure (40) comprises a first connecting rod (41), a second connecting rod (42) and a third connecting rod (43), one end of the first connecting rod (41) is fixedly connected with the driving shaft (51), the other end of the first connecting rod (41) is hingedly connected with one end of the second connecting rod (42) at point A, the other end of the second connecting rod (42) is hingedly connected with one end of the third connecting rod (43) at point B, and the other end of the third connecting rod (43) is fixedly connected with the driving shaft (20); wherein the distance between the rotating center line of the driving shaft (51) and point A is L1, the distance between the rotating center line of the driving shaft (20) and point B is L2, and L1>L2.

4. The isolation valve according to claim 1, wherein The transmission structure (40) comprises a driving gear and a driven gear, the driving gear is installed on the driving shaft (51), the driven gear is installed on the driving shaft (20), the driving gear and the driven gear are in engagement, and the number of teeth of the driving gear is greater than that of the driven gear; Or, the transmission structure (40) comprises a synchronous belt, a driving synchronous wheel and a driven synchronous wheel, the driving synchronous wheel is installed on the driving shaft (51), the driven synchronous wheel is installed on the driving shaft (20), the driving synchronous wheel and the driven synchronous wheel are in engagement with the synchronous belt, and the number of teeth of the driving synchronous wheel is greater than that of the driven synchronous wheel; Or, the transmission structure (40) comprises a chain, a driving sprocket and a driven sprocket, the driving sprocket is installed on the driving shaft (51), the driven sprocket is installed on the driving shaft (20), the driving sprocket and the driven sprocket are in engagement with the chain, and the number of teeth of the driving sprocket is greater than that of the driven sprocket.

5. The isolating valve of claim 1, wherein, The driving part (50) is an angular stroke actuator, when the driving shaft (51) rotates from the starting position to the rotating position, the rotating angle of the driving shaft (51) is 90 degrees, and the rotating angle of the driving shaft (20) is 95-100 degrees.

6. The isolating valve of claim 1, wherein, The leaf structure (30) comprises N sub-leaf blades (31), the valve port (11) comprises N sub-openings (111), N≥2, each sub-leaf blade (31) is used for opening and closing one sub-opening (111); the isolation valve further comprises a linkage structure (60), the driving shaft (20) and the linkage structure (60) are matched, the driving shaft (20) and the linkage structure (60) drive N sub-leaf blades (31) to rotate synchronously, so that N sub-openings (111) are opened and closed synchronously.

7. The isolating valve according to claim 6, characterized in that N sub-leaf blades (31) comprise one driving leaf blade (311) and N-1 driven leaf blades (312), the linkage structure (60) comprises a transmission assembly and N-1 driven shafts (63), the driven shaft (63) is rotatably arranged on the frame structure (10); wherein the driving leaf blade (311) is installed on the driving shaft (20), each driven leaf blade (312) is respectively installed on one driven shaft (63), the driving shaft (20) is drivingly connected with the transmission assembly, the transmission assembly is drivingly connected with N-1 driven shafts (63), and the driving shaft (20) drives N-1 driven shafts (63) to rotate synchronously through the transmission assembly.

8. The isolating valve according to claim 7, characterized in that The transmission assembly comprises a transmission rod (61) and N parallel rotary arms (62), the driving shaft (20) and a first end of one rotary arm (62) are fixedly connected, each driven shaft (63) is respectively fixedly connected with a first end of one rotary arm (62), and second ends of N rotary arms (62) are hingedly connected with the transmission rod (61).

9. The isolating valve of claim 1, wherein, The isolation valve further comprises a sealing structure (70), the sealing structure (70) is arranged on the frame structure (10) and / or the leaf structure (30), and when the leaf structure (30) is in the closed position, the sealing structure (70) is clamped between the periphery of the valve port (11) and the periphery of the leaf structure (30).

10. The isolating valve according to claim 9, characterized in that The leaf structure (30) comprises N side-by-side sub-leaf blades (31), the valve port (11) comprises N sub-openings (111), N≥2, each sub-leaf blade (31) is used for opening and closing one sub-opening (111); the frame structure (10) comprises an outer frame and N-1 cross beams, N sub-openings (111) are formed between the outer frame and N-1 cross beams, and the sealing structure (70) comprises sealing rubber strips (71) arranged on the outer frame and the cross beams; when the leaf structure (30) is in the closed position, the periphery of each sub-leaf blade (31) abuts against the corresponding sealing rubber strip (71).

Images