Electrically-adjusted cut-off butterfly valve

Abstract

The invention relates to the technical field of valve bodies, in particular to an electrically-adjusted cut-off butterfly valve which comprises a valve body, two butterfly valve rollers arranged oppositely and an electric driving assembly. A rotating wheel cavity is formed in the valve body, the two butterfly valve rollers are rotationally installed on the inner side of the rotating wheel cavity, the ends of the butterfly valve rollers form a synchronous reverse transmission structure through a driving fluted disc and a driven fluted disc respectively, a motor drives the driving fluted disc to rotate through a speed reduction tooth set, and therefore the two butterfly valve rollers are driven to synchronously and reversely rotate. Flow channel grooves are formed in the surface of the butterfly valve roller in the axial direction and combined to form opposite V-shaped flow channels in the opening state, fluid forms beam flow in the axial direction of a valve body to pass through, and the flow dividing phenomenon of a traditional single-disc type butterfly valve is avoided. The grating holes are formed in the driving fluted disc and the driven fluted disc and matched with the grating sensor to detect the rotating angle of the butterfly valve roller, and the opening degree of the valve is accurately controlled. By means of the structure, stable opening and closing and accurate adjustment of the valve can be achieved, fluid scouring and abrasion are reduced, the service life of the valve body is prolonged, and operation reliability is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve body, in particular to an electrically adjusted cut-off butterfly valve. BACKGROUND

[0002] As a commonly used fluid control valve, the butterfly valve is widely used in water supply and drainage, chemical industry, energy and industrial pipeline system due to its compact structure, fast opening and closing speed, low manufacturing cost and other advantages. In the prior art, the most widely used is the single disc butterfly valve structure, which usually sets a circular or approximately circular butterfly plate in the valve body. By rotating the butterfly plate around the valve rod axis, the pipeline is opened, adjusted or cut off.

[0003] In the open state of the single disc butterfly valve, the butterfly plate is located in the center area of the pipeline flow passage, and the fluid entering the valve body from the inlet end is divided into two streams by the butterfly plate, which flows around the two sides of the butterfly plate. Although this structure can realize the basic on-off and adjustment function, the fluid flow form is essentially a double-sided split flow structure.

[0004] Due to the split flow of fluid on both sides of the butterfly plate, the flow velocity distribution in the flow passage is uneven, and obvious turbulent flow, vortex and local high-speed scouring area are easily formed in the butterfly plate's upstream and downstream areas. On the one hand, the split flow structure causes the fluid to produce asymmetric scouring on the edge of the butterfly plate and the inner wall of the valve body, which can easily cause the butterfly plate, sealing ring and local valve body to wear out, affecting the service life and sealing reliability of the valve; on the other hand, the generation of turbulent flow and vortex can also cause the fluid noise to increase and the pressure loss to rise, reducing the overall operating efficiency of the pipeline system.

[0005] In addition, in the partial opening or throttling state of the single disc butterfly valve, the butterfly plate is inclinedly arranged in the flow passage, and the split flow phenomenon is more obvious. The fluid often concentrates on one side of the butterfly plate, and a low-speed area or even a stagnant flow area is formed on the other side, further intensifying the instability of the flow field. Such unstable flow not only affects the linearity and accuracy of valve adjustment, but also can accelerate the wear and failure of the sealing structure under high flow rate or solid particle medium working conditions.

[0006] To solve the above problems, some existing technologies try to guide the fluid by changing the shape of the butterfly plate or adding guide ribs, but due to the structure of the single disc butterfly valve, the fluid still needs to bypass the single butterfly plate, and the split flow characteristics are difficult to eliminate fundamentally. The overall flow passage still presents a clear horizontal split flow state, and it is difficult to realize axial concentrated flow.

[0007] Therefore, the existing single disc butterfly valve generally has the problems of concentrated fluid scouring, flow field turbulence, sealing life reduction and insufficient adjustment stability caused by the split flow structure, and a new type of butterfly valve structure that can change the traditional split flow mode, concentrate the fluid along the axial direction of the valve body, and consider precise adjustment and reliable cut-off is needed to overcome the above shortcomings of the prior art. SUMMARY

[0008] The present application aims to solve the problems of the prior art, such as obvious fluid diversion, flow field disorder, serious local scouring, fast wear of the sealing member and the valve body, limited valve regulating accuracy and service life, etc. The present application provides an electrically-regulated cut-off butterfly valve, which changes the flow channel structure of the traditional butterfly valve single butterfly plate diversion, combines synchronous transmission and precise electric control detection structure, realizes axial concentrated flow guiding of the fluid along the valve body, accurate controllable valve opening degree, and stable and reliable opening and closing process, thereby overcoming the shortcomings of the prior art.

[0009] The present application provides an electrically-regulated cut-off butterfly valve, which comprises a valve body, butterfly rollers and an electric drive assembly. The valve body is internally provided with a rotating wheel cavity, and two butterfly rollers are oppositely arranged and rotatably installed on the inner side of the rotating wheel cavity. The end of the butterfly roller is formed into a synchronous reverse transmission structure through a driving gear disc and a driven gear disc, and the driving gear disc is driven to rotate by a motor through a speed reduction gear set, thereby driving the two butterfly rollers to synchronously and reversely rotate. The surface of the butterfly roller is provided with a flow channel groove, which forms a V-shaped flow channel in opposition in the open state, so that the fluid forms a beam flow along the axial direction of the valve body. At the same time, the rotating angle of the butterfly roller is detected in real time through a grating detection structure, thereby realizing accurate control of the valve opening degree.

[0010] In a preferred example, the valve body is internally provided with a rotating wheel cavity, and the two butterfly rollers are oppositely arranged and rotatably installed in the rotating wheel cavity. The upper and lower surfaces of the valve body are respectively provided with a liquid inlet port and a liquid outlet port, and the liquid inlet port and the liquid outlet port are located on both sides of the rotating wheel cavity and are aligned along the axial direction. Specifically, through this structure, the fluid passes linearly along the axial direction of the valve body in the open state of the valve, thereby reducing the energy loss and scouring caused by fluid deflection.

[0011] In a preferred example, the butterfly roller is a cylindrical roller structure, and a U-shaped flow channel groove is formed on the outer peripheral surface of the cylindrical roller structure along the axial direction. In the synchronous reverse rotation process of the two butterfly rollers, the flow channel grooves of the two butterfly rollers are mutually opposed to form a V-shaped flow channel structure. Specifically, the V-shaped flow channel plays a role in concentrating and guiding the fluid, avoids the two-side diversion phenomenon of the traditional butterfly valve, reduces the turbulence and local high-speed scouring, and improves the service life of the valve body and the sealing structure.

[0012] In a preferred example, the valve body is provided with a transmission box on both sides, and the end of the butterfly roller is fixedly installed with a driving gear disc and a driven gear disc. The driving gear disc and the driven gear disc are mutually engaged through gear teeth to form an equal-angle synchronous reverse transmission structure. Specifically, this synchronous transmission mode ensures that the two butterfly rollers always maintain symmetrical motion in the opening and closing and regulating process, so as to stabilize the flow channel form and improve the stability of the valve opening and closing and the linearity of the regulation.

[0013] In a preferred embodiment, the electric drive assembly includes a motor and a reduction gear set, with the motor output engaging with a gear ring fixed to the drive gear plate via the reduction gear set. Specifically, a multi-stage reduction structure enables precise control of the butterfly valve roller rotation angle, allowing the valve to remain stably in open, closed, and any intermediate opening position, thus meeting the requirements for precise flow regulation.

[0014] In a preferred embodiment, the configuration is further as follows: grating holes are set at equal angles along the circumferential direction on the surfaces of the driving and driven gear disks, and corresponding grating sensors are set inside the transmission box. Specifically, through the cooperation of the grating holes and the grating sensors, the rotation angle of the gear disks is detected in real time, thereby obtaining the actual opening information of the butterfly valve roller, providing reliable position feedback for the valve's electronic control system, and realizing closed-loop control.

[0015] In a preferred embodiment, a sealing strip is further configured such that it slides against the outer surface of the butterfly valve roller. Specifically, a dynamic seal is formed during the rotation of the butterfly valve roller, ensuring the sealing reliability of the valve in the off state while also ensuring smooth rotation during opening and closing.

[0016] The beneficial effects achieved by this invention are as follows: 1. In this invention, by setting two butterfly valve rollers that are arranged oppositely and rotate synchronously in opposite directions, the flow channel grooves on their surfaces combine to form opposing V-shaped flow channels when the valve is open. Compared with the lateral flow-dividing structure of traditional single butterfly plates or diverting butterfly valves, this can effectively guide the fluid to pass stably along the valve body axis, reduce fluid scouring and turbulence, thereby reducing the wear of the valve body and sealing structure, and improving the service life and operational reliability of the butterfly valve.

[0017] 2. In this invention, a synchronous transmission structure in which the active and driven toothed discs mesh is adopted, and a precise deceleration drive link is formed with the motor through the toothed ring sleeve, the reduction gear group, and the motor, so as to realize the synchronous reverse rotation of the two butterfly valve rollers at equal angles. This not only ensures the symmetry and stability during the valve opening and closing process, but also enables the valve opening degree to be continuously adjustable, which is beneficial to fine flow control and improves the accuracy and response consistency of electric regulation.

[0018] 3. In this invention, grating holes distributed in a circular pattern are provided on the active and driven gear discs, and the grating sensor in the transmission box is used to detect the rotation state of the butterfly valve roller in real time, so that the valve has the ability to provide opening position feedback, which facilitates the realization of closed-loop control and status monitoring of the electronic control system, thereby improving the controllability, automation and operational safety of valve adjustment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2This is a schematic diagram of the valve body and its internal butterfly valve roller structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the transmission box according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of two butterfly valve rollers according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the valve body according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the valve body structure according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the transmission box and its internal driving and driven gear disks according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the motor and reduction gear assembly structure according to an embodiment of the present invention.

[0020] Figure label: 100. Valve body; 110. Inlet port; 120. Drain port; 130. Transmission box; 131. Grating sensor; 140. Rotor chamber; 141. Sealing strip; 200. Butterfly valve roller; 201. Flow channel groove; 210. Driven gear disc; 220. Driven gear disc; 230. Gear ring sleeve; 221. Gear tooth; 222. Grating hole; 300. Electric drive assembly; 310. Motor; 311. Bearing ring; 320. Reduction gear set. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of an electrically adjustable shut-off butterfly valve provided by the present invention.

[0024] Combination Figures 1-8 As shown, the present invention provides an electrically adjustable shut-off butterfly valve, comprising a valve body 100, a butterfly valve roller 200, and an electric drive assembly 300.

[0025] The inner side of the valve body 100 is integrally formed to form a rotating cavity 140, which is used to accommodate and install two butterfly valve rollers 200. The two butterfly valve rollers 200 are arranged opposite to each other and are rotatably mounted on the inner side of the rotating cavity 140, so that the two butterfly valve rollers 200 can rotate relative to each other around their respective axes.

[0026] A transmission box 130 is fixedly installed on both sides of the valve body 100, and each transmission box 130 is respectively located at the end of the butterfly valve roller 200. A drive gear plate 210 and a driven gear plate 220 are fixedly installed inside the transmission box 130, respectively. The drive gear plate 210 is fixedly connected to the end of one of the butterfly valve rollers 200, and the driven gear plate 220 is fixedly connected to the end of the other butterfly valve roller 200.

[0027] Both the driving gear disk 210 and the driven gear disk 220 have gear teeth 221 on their outer peripheral surfaces. The two gear disks are driven by meshing gear teeth 221, so that when the driving gear disk 210 rotates, it synchronously drives the driven gear disk 220 to rotate in opposite directions.

[0028] The outer circumferential surface of the butterfly valve roller 200 is provided with a flow channel groove 201 along the axial direction. A gear ring sleeve 230 is fixedly installed on one side of the drive gear disc 210. The electric drive assembly 300 includes a motor 310 and a reduction gear set 320. The motor 310 is rotatably sleeved on the inner side of the gear ring sleeve 230, and its output end is driven by meshing with the surface of the gear ring sleeve 230 through the reduction gear set 320 to drive the drive gear disc 210 to rotate.

[0029] In addition, the surfaces of both the driving gear disk 210 and the driven gear disk 220 are provided with a number of grating holes 222 arranged in a circumferential direction. A grating sensor 131 is fixedly installed on the inner side of the transmission box 130. The grating sensor 131 is arranged opposite to the grating holes 222 and is used to detect the rotation state of the gear disk.

[0030] In this embodiment, the butterfly valve roller 200 is a cylindrical roller structure, and the axes of the two butterfly valve rollers 200 are arranged parallel to each other. Each butterfly valve roller 200 has a flow channel groove 201 axially formed on its outer peripheral surface. The flow channel groove 201 is a U-shaped groove structure extending along the axial direction of the butterfly valve roller to ensure the formation of a continuous and stable fluid channel during rotation.

[0031] In this embodiment, a sealing strip 141 is fixedly installed inside the rotor cavity 140. The sealing strip 141 is arranged vertically along the inner wall of the rotor cavity 140 and forms a sliding contact with the outer circumferential surface of the butterfly valve roller 200. During the rotation of the butterfly valve roller 200, the sealing strip 141 is used to dynamically seal the gap between the butterfly valve roller 200 and the rotor cavity 140, thereby effectively preventing fluid leakage during valve closing or adjustment.

[0032] In this embodiment, during the relative rotation of the two butterfly valve rollers 200, the flow channel grooves 201 on their respective surfaces can be combined to form a V-shaped flow channel structure arranged in opposite directions.

[0033] When the butterfly valve is in the open state, the two flow channels 201 engage with each other, forming an axially extending flow guide channel inside the valve body 100, which concentrates the fluid flow along the central axis of the valve body, avoiding the uneven scouring problem caused by the flow splitting on both sides of the traditional butterfly valve.

[0034] In this embodiment, the driving gear disk 210 and the driven gear disk 220 are coaxially fixed to the ends of the corresponding butterfly valve roller 200, and the two are directly meshed by the gear teeth 221.

[0035] This structure forms an equal-angle synchronous reverse transmission relationship, that is, when the active toothed disc 210 rotates, the driven toothed disc 220 rotates at the same angular velocity but in the opposite direction, thereby ensuring that the two butterfly valve rollers 200 maintain synchronous reverse rotation throughout the entire working process, ensuring the symmetry and sealing consistency of the V-shaped flow channel.

[0036] In this embodiment, the toothed ring sleeve 230 is an annular external tooth structure and is fixedly installed on one side of the drive gear disk 210. The reduction gear assembly 320 is a multi-stage gear reduction structure, which is located between the output end of the motor 310 and the toothed ring sleeve 230. It is used to convert the high-speed output of the motor 310 into a low-speed, high-torque output and accurately transmit it to the drive gear disk 210 to achieve precise angle control of the butterfly valve roller 200.

[0037] In this embodiment, the grating holes 222 are arranged at equal angular intervals along the circumference of the driving gear disk 210 and the driven gear disk 220. The grating sensor 131 is fixed inside the transmission box 130. During the rotation of the gear disk, the grating holes 222 pass through the grating sensor 131 in sequence. The grating sensor 131 is used to detect the passing state of the grating holes 222, thereby obtaining the rotation angle information of the gear disk and indirectly reflecting the rotation position of the butterfly valve roller 200, realizing real-time monitoring of the valve opening.

[0038] In this embodiment, the upper and lower surfaces of the valve body 100 are respectively provided with an inlet port 110 and a drain port 120, which are distributed on both sides of the impeller cavity 140. The axial direction of the inlet port 110 and the drain port 120 is consistent with the centerline direction of the V-shaped flow channel formed by the combination of two butterfly valve rollers 200, so that the fluid flows in a straight axial direction when the valve is open, thereby reducing flow resistance and improving the overall service life of the valve body.

[0039] Working principle and usage process of this invention: This invention is based on the working mechanism of synchronous reverse rotation of double butterfly valve rollers + V-shaped beam guidance + electric drive precision control and position feedback, to realize the opening, adjustment and cut-off of valve body flow channel.

[0040] In operation, the motor 310 in the electric drive assembly 300 starts, and its output rotation is reduced in speed and amplified in torque by the reduction gear set 320 before being transmitted to the gear ring sleeve 230, thereby driving the drive gear disk 210, which is fixedly connected to it, to rotate. The drive gear disk 210 meshes with the driven gear disk 220 through the gear teeth 221, so that the driven gear disk 220 rotates synchronously with the drive gear disk 210 at the same angle but in the opposite direction.

[0041] Since the driving gear disk 210 and the driven gear disk 220 are respectively fixed to the ends of the two butterfly valve rollers 200, the synchronous reverse rotation of the gear disks directly drives the two butterfly valve rollers 200 to rotate synchronously in opposite directions around their respective axes. Through this synchronous transmission structure, it is ensured that the two butterfly valve rollers 200 maintain a symmetrical motion state throughout the entire opening, closing and adjustment process.

[0042] When the butterfly valve roller 200 rotates to the open position, the flow channel grooves 201 on the surfaces of the two butterfly valve rollers 200 engage with each other, forming an opposing V-shaped flow channel structure. This V-shaped flow channel is used to guide the fluid to concentrate along the axial direction of the valve body 100, so that the fluid flows in a bundle state, thereby avoiding the turbulence and local scouring caused by the flow splitting on both sides of the traditional butterfly valve.

[0043] When the butterfly valve roller 200 continues to rotate to the closed position, the outer circular surface of the butterfly valve roller 200 gradually closes the flow channel inside the rotor cavity 140 with the cooperation of the sealing strip 141, thereby achieving reliable cut-off between the liquid inlet port 110 and the liquid outlet port 120.

[0044] During the rotation of the butterfly valve roller 200, the grating holes 222 on the surfaces of the driving gear disk 210 and the driven gear disk 220 pass sequentially through the grating sensor 131. The grating sensor 131 detects the passing state of the grating holes 222, thereby obtaining the rotation angle information of the gear disk and indirectly reflecting the real-time opening position of the butterfly valve roller 200, providing feedback for the precise electric adjustment and status monitoring of the valve.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrically actuated regulating cut-off butterfly valve, characterized in that The utility model relates to a butterfly valve, including valve body (100), butterfly valve roller (200) and electric drive assembly (300), the inside of valve body (100) is equipped with runner cavity (140), two butterfly valve roller (200) are opposite and rotate installation in the inside of runner cavity (140), both sides of valve body (100) are all fixedly installed with transmission box (130), The inside of transmission box (130) is equipped with driving gear disc (210) and driven gear disc (220) fixed in the end of two butterfly valve roller (200), and the surface of driving gear disc (210) and driven gear disc (220) is all equipped with gear (221), and is driven through gear (221) intermeshing, the surface of butterfly valve roller (200) is equipped with flow channel groove (201), the surface of driving gear disc (210) is fixedly installed with gear ring sleeve (230).

2. A motor-operated regulating cut-off butterfly valve according to claim 1, characterized in that Butterfly valve roller (200) is cylindrical roller body structure, the axis of two butterfly valve roller (200) is parallelly arranged, and the flow channel groove (201) is U-shaped groove structure extending along the axis of butterfly valve roller (200).

3. A motor-operated regulating cut-off butterfly valve according to claim 1, characterized in that The inside of runner cavity (140) is fixedly installed with sealing strip (141), the outer circle surface of butterfly valve roller (200) is slidably contacted with sealing strip (141), which is used for forming dynamic sealing during the rotation of butterfly valve roller (200).

4. The electrically actuated regulating cut-off butterfly valve according to claim 1, characterized in that The flow channel groove (201) of two butterfly valve roller (200) is combined to form the V-shaped flow channel structure of opposite arrangement during relative rotation, so that the fluid in the valve body (100) forms a beam guiding channel in the axial direction in the open state.

5. The electrically actuated regulating cut-off butterfly valve according to claim 1, characterized in that Driving gear disc (210) and driven gear disc (220) are coaxially arranged at the end of corresponding butterfly valve roller (200), and they form an equal-angle synchronous transmission structure through gear (221), which is used for ensuring the synchronous reverse rotation of two butterfly valve roller (200) during rotation.

6. A motor-operated regulating cut-off butterfly valve according to claim 1, characterized in that The upper and lower surfaces of valve body (100) are provided with liquid inlet port (110) and liquid outlet port (120), and are arranged on both sides of runner cavity (140), and the liquid inlet port (110), the liquid outlet port (120) and the V-shaped flow channel center line formed by two butterfly valve roller (200) are consistent.

7. The electrically actuated control valve according to claim 1, wherein The electric drive assembly (300) includes a motor (310) and a reduction gear set (320), the motor (310) is rotatably connected to the inside of the gear ring sleeve (230), and the output end is connected to the surface of the gear ring sleeve (230) through the reduction gear set (320); the surface of the driving gear disc (210) and the driven gear disc (220) is provided with a plurality of grating holes (222) arranged in the circumferential direction, and the inside of the transmission box (130) is fixedly installed with a grating sensor (131), and the grating sensor (131) is arranged opposite to the surface of the grating hole (222).

8. An electrically actuated regulating cut-off butterfly valve according to claim 7, characterized in that The grating holes (222) are arranged at equal angles along the circumferential direction of the driving gear disc (210) and the driven gear disc (220), and the grating sensor (131) is used for detecting the passing state of the grating hole (222) to obtain the rotation angle information of the butterfly valve roller (200).

9. An electrically actuated regulating cut-off butterfly valve according to claim 8, characterized in that The tooth ring sleeve (230) is an annular external tooth structure, fixed on one side of the driving tooth disc (210), and the reduction gear set (320) is a multi-stage gear reduction structure, used for reducing the output rotating speed of the motor (310) and amplifying the torque to be transmitted to the tooth ring sleeve (230).

Images