Triple-eccentric structure of variable-frequency electric vacuum butterfly valve

Abstract

The utility model discloses a three-eccentric structure of a variable-frequency electric vacuum butterfly valve, which comprises a valve body, a fixing part and a driving motor, the fixing part is arranged at the top of the valve body, the fixing part is further provided with a connecting frame arranged at the top of the valve body, a driving rod is transversely and rotatably arranged in the connecting frame, a clamping plate is transversely and slidably arranged in the connecting frame, and the driving rod is connected with the clamping plate. The driving rod penetrates through the clamping plate and is in threaded connection with the clamping plate, the driving rod rotates to drive the clamping plate to move transversely, the driving motor is arranged on the side face of the connecting frame, and a butt joint block is arranged on the side face of the driving motor and is connected with the clamping plate in a clamped mode. By arranging the fixing part and the driving motor, the driving motor can be quickly disassembled, assembled and maintained, when the driving motor needs to be replaced or overhauled, the driving motor can be fixed only by rotating the driving rod to enable the clamping plate to move transversely, the whole valve structure does not need to be disassembled, the maintenance efficiency is improved, and the maintenance cost is reduced. And meanwhile, the mounting stability and accuracy of the driving motor are ensured.

Description

Technical Field

[0001] This utility model relates to the field of triple-eccentric butterfly valve technology, specifically a triple-eccentric structure for a frequency conversion electric vacuum butterfly valve. Background Technology

[0002] A vacuum butterfly valve is a type of valve used in vacuum systems, primarily for opening or cutting off airflow under vacuum conditions. Its working principle involves rotating a butterfly plate fixed to a rotating shaft by 90° to open and close the valve. A triple-eccentric butterfly valve is a type of vacuum butterfly valve that achieves zero-friction opening and closing and high-pressure sealing through a design that incorporates the valve stem axis offset from the butterfly plate center (first eccentricity), the sealing surface cone angle offset (second eccentricity), and the inclined surface geometric asymmetry (third eccentricity).

[0003] Existing variable frequency electric triple eccentric vacuum butterfly valves use a motor as the power source for opening and closing the butterfly valve. The motor is usually directly fixed to the top of the butterfly valve body by flange bolts. In addition, the integrated design of the motor shaft seal and valve stem seal makes the maintenance and replacement of the motor cumbersome and slow in disassembly and maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a triple-eccentric structure for a variable frequency electric vacuum butterfly valve, in order to solve the problem mentioned in the background art that the existing variable frequency electric triple-eccentric vacuum butterfly valve uses a motor as the power source for opening and closing the butterfly valve. Usually, the motor is directly fixed to the top of the butterfly valve body by flange bolts. In addition, the motor shaft seal and valve stem seal are integrated into one design, which makes the maintenance and replacement of the motor cumbersome and the disassembly and maintenance efficiency slow.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a triple-eccentric structure for a variable frequency electric vacuum butterfly valve, comprising a valve body, a fixing part, and a drive motor:

[0006] The valve body has a valve plate rotatably mounted inside, and a worm gear rotatably mounted on the top of the valve body. The worm gear meshes with the valve plate. A fixing part is located on the top of the valve body, and the fixing part also has a connecting frame located on the top of the valve body. A drive rod is rotatably mounted inside the connecting frame, and a clamping plate is slidably mounted inside the connecting frame. The drive rod passes through the clamping plate and is threadedly connected to the clamping plate. The drive rod rotates to drive the clamping plate to move laterally. A drive motor is located on the side of the connecting frame, and a mating block is located on the side of the drive motor. The mating block engages with the clamping plate, and the clamping plate moves laterally to engage and fix the position of the drive motor.

[0007] By adopting the above technical solution, the drive motor can be quickly disassembled and maintained. When the drive motor needs to be replaced or repaired, simply rotate the drive rod to move the clamp laterally to release the drive motor from its fixation. There is no need to disassemble the entire valve structure, which improves maintenance efficiency and ensures the stability and accuracy of the drive motor installation.

[0008] Preferably, the valve body also has a transmission box disposed on the top of the valve body, and the side of the rotating shaft of the valve plate is provided with transmission teeth, which are meshed with the worm gear. The transmission teeth are located inside the transmission box, and the worm gear is laterally rotatable inside the transmission box.

[0009] By adopting the above technical solution, the rotational motion of the drive motor can be efficiently converted into the rotational motion of the valve plate through the meshing transmission of the worm gear and the transmission gear, thereby realizing precise opening and closing control of the valve.

[0010] Preferably, one end of the worm extends to the outside of the transmission box, and a recessed groove is provided at one end of the worm. A ring of teeth is arranged around the inside of the groove, and the groove is engaged with the output shaft.

[0011] By adopting the above technical solution, the drive motor and worm can be quickly connected and power transmitted. The slot of the toothed structure can ensure the precise fit between the output shaft and the worm, avoiding slippage during transmission. At the same time, this quick-separation connection method facilitates the individual maintenance and replacement of the drive motor.

[0012] Preferably, the fixing part also has a groove laterally opened inside the connecting frame, and the clamp is embedded in the groove and slidably connected to the connecting frame laterally.

[0013] By adopting the above technical solution, it can be ensured that the clamping plate maintains a stable movement trajectory during movement. The slide provides precise guidance for the clamping plate, preventing it from shifting or jamming during movement and ensuring the accuracy of the drive motor installation and positioning.

[0014] Preferably, there are two clamps, which are arranged in a mirror-symmetrical manner along the central axis of the connecting frame.

[0015] By adopting the above technical solution, the drive motor can be balanced by two symmetrically arranged clamping plates, ensuring that the drive motor is subjected to uniform force, avoiding installation deviation or vibration problems caused by unilateral force, and improving the stability and service life of the entire transmission system.

[0016] Preferably, the fixing part also has a threaded groove opened inside the clamping plate, the drive rod passes laterally through the threaded groove and is threadedly connected to the clamping plate, and the drive rod extends to the outside of the connecting frame and is provided with a hexagonal bolt.

[0017] By adopting the above technical solution, the movement distance of the clamp can be precisely controlled by rotating the drive rod. The threaded transmission method has self-locking and precise position control capabilities, and the design of the hexagonal bolt facilitates operation using standard tools.

[0018] Preferably, the fixing part also has a slide rod arranged laterally inside the connecting frame, and the inside of the clamping plate has a sliding hole, through which the slide rod passes and is slidably connected to the clamping plate.

[0019] By adopting the above technical solution, the stability and guiding accuracy of the clamping plate movement can be further enhanced. The cooperation between the slide rod and the slide hole can effectively prevent the clamping plate from rotating or shifting during the movement, ensuring that the clamping plate always maintains linear movement and improving the repeatability of the drive motor installation.

[0020] Preferably, the fixing part also has a locking block disposed on the side of the clamp plate, which engages with the docking block.

[0021] By adopting the above technical solution, the drive motor can be quickly positioned and fixed through the precise cooperation of the locking block and the docking block.

[0022] Compared with the prior art, the beneficial effects of this utility model are: by setting a fixing part and a drive motor, the drive motor can be quickly disassembled and maintained. When it is necessary to replace or repair the drive motor, simply rotate the drive rod to move the clamp laterally to release the fixation of the drive motor. There is no need to disassemble the entire valve structure, which improves maintenance efficiency and ensures the stability and accuracy of the drive motor installation. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this application;

[0024] Figure 2 This is a schematic diagram of the overall cross-sectional structure of this application;

[0025] Figure 3 This is a schematic diagram of the valve body structure of this application;

[0026] Figure 4 This is a schematic diagram of the connection structure between the fixing part and the drive motor in this application;

[0027] Figure 5 This is an exploded structural diagram of the fixed part of this application.

[0028] In the diagram: 1. Valve body; 101. Valve plate; 102. Transmission gear; 103. Transmission box; 104. Worm gear; 105. Slot; 2. Fixing part; 201. Connecting frame; 202. Slide groove; 203. Drive rod; 204. Slide rod; 205. Clamping plate; 206. Threaded groove; 207. Slide hole; 208. Locking block; 3. Drive motor; 301. Connecting block; 302. Output shaft. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Example 1

[0031] Please see Figure 1 , Figure 2 and Figure 3 This embodiment provides a technical solution: a triple-eccentric structure for a variable frequency electric vacuum butterfly valve, comprising a valve body 1, a fixing part 2, and a drive motor 3.

[0032] A valve plate 101 is rotatably mounted inside the valve body 1, and a worm gear 104 is rotatably mounted on the top of the valve body 1. The worm gear 104 is meshed with the valve plate 101.

[0033] The fixing part 2 is located on the top of the valve body 1. The fixing part 2 also has a connecting bracket 201 fixedly mounted on the top of the valve body 1. This fixing method is an existing detachable fixing method, such as bolt connection or snap-fit ​​connection. A drive rod 203 is laterally rotatably mounted inside the connecting bracket 201, and a clamping plate 205 is laterally slidably mounted inside the connecting bracket 201. The drive rod 203 passes through the clamping plate 205 and is threadedly connected to it. The drive rod 203 rotates to drive the clamping plate 205 to move laterally. The drive motor 3 is located on the side of the connecting bracket 201, and a mating block 301 is provided on the side of the drive motor 3. The mating block 301 engages with the clamping plate 205. The clamping plate 205 moves laterally to engage and fix the position of the drive motor 3. The drive motor 3 is specifically... The stepper motor is a type of motor that converts electrical pulse signals into angular or linear displacement. Its working principle is based on the interaction of electromagnetic induction and magnetic fields. Precise position and speed control is achieved by controlling the number and frequency of electrical pulses. The above is existing technology and will not be elaborated further below. When selecting a model, its power should be selected to suit the needs of the device to ensure that the object to be driven is driven. The drive motor 3 can be quickly disassembled and maintained. When it is necessary to replace or repair the drive motor 3, simply rotate the drive rod 203 to move the clamp 205 laterally to release the fixation of the drive motor 3 without disassembling the entire valve structure, which improves maintenance efficiency and ensures the stability and accuracy of the drive motor 3 installation.

[0034] Example 2

[0035] Please see Figure 3 , Figure 4and Figure 5 This embodiment provides a technical solution: a triple-eccentric structure for a variable frequency electric vacuum butterfly valve, comprising a valve body 1, a fixing part 2, and a drive motor 3.

[0036] A transmission box 103 is fixedly installed on the top of the valve body 1. The fixing method is an existing detachable fixing, such as bolt connection, snap connection, etc. A transmission gear 102 is provided on the side of the rotating shaft of the valve plate 101. The transmission gear 102 is meshed with the worm gear 104. The transmission gear 102 is located inside the transmission box 103. The worm gear 104 is rotatably arranged inside the transmission box 103. The rotational motion of the drive motor 3 can be efficiently converted into the rotational motion of the valve plate 101 through the meshing of the worm gear 104 and the transmission gear 102, so as to realize the precise opening and closing control of the valve.

[0037] One end of the worm gear 104 extends to the outside of the transmission box 103. A recessed groove 105 is provided at one end of the worm gear 104. A ring of teeth is arranged around the inside of the groove 105. The groove 105 engages with the output shaft 302, which can realize the quick docking and power transmission between the drive motor 3 and the worm gear 104. The toothed groove 105 can ensure the precise fit between the output shaft 302 and the worm gear 104 and avoid slippage during the transmission process. At the same time, this quick-disconnect connection method facilitates the individual maintenance and replacement of the drive motor 3.

[0038] A sliding groove 202 is provided inside the connecting frame 201. The clamping plate 205 is embedded in the sliding groove 202 and is laterally slidably connected to the connecting frame 201. This ensures that the clamping plate 205 maintains a stable movement trajectory during movement. The sliding groove 202 provides precise guidance for the clamping plate 205, preventing the clamping plate 205 from shifting or jamming during movement, and ensuring the accuracy of the installation and positioning of the drive motor 3.

[0039] There are two clamping plates 205, which are mirror-symmetrically arranged along the central axis of the connecting frame 201. The two symmetrically arranged clamping plates 205 can achieve balanced clamping of the drive motor 3, ensuring that the drive motor 3 is subjected to uniform force, avoiding installation deviation or vibration problems caused by unilateral force, and improving the stability and service life of the entire transmission system.

[0040] A threaded groove 206 is provided inside the clamping plate 205. The drive rod 203 passes laterally through the threaded groove 206 and is threadedly nested with the clamping plate 205. The drive rod 203 extends to the outside of the connecting frame 201 and is provided with a hexagonal bolt. The drive rod 203 is a two-way lead screw. A two-way lead screw is a special lead screw structure. Its core feature is that it can achieve two opposite movements on the same lead screw. The above is the prior art and will not be described in detail below. The movement distance of the clamping plate 205 can be precisely controlled by rotating the drive rod 203. The threaded transmission method has self-locking and precise position control capabilities. The design of the hexagonal bolt facilitates operation using standard tools.

[0041] A slide rod 204 is horizontally arranged inside the connecting frame 201, and a sliding hole 207 is horizontally opened inside the clamping plate 205. The slide rod 204 passes through the sliding hole 207 and slides in connection with the clamping plate 205, which can further enhance the stability and guiding accuracy of the movement of the clamping plate 205. The cooperation between the slide rod 204 and the sliding hole 207 can effectively prevent the clamping plate 205 from rotating or shifting during the movement, ensuring that the clamping plate 205 always maintains linear movement and improving the repeatability of the drive motor 3 installation.

[0042] A locking block 208 is integrally provided on the side of the clamping plate 205. The locking block 208 is engaged with the docking block 301. The precise cooperation between the locking block 208 and the docking block 301 can realize the rapid positioning and fixation of the drive motor 3.

[0043] Working principle: First, the drive motor 3 moves so that the spline of the output shaft 302 is inserted into the slot 105. Then, the drive rod 203 is rotated with a wrench. By rotating the drive rod 203, the movement distance of the clamping plate 205 is precisely controlled, so that the two clamping plates 205 move synchronously towards the center along the slide rod 204. The cooperation between the slide rod 204 and the slide hole 207 can effectively prevent the clamping plate 205 from rotating or shifting during the movement, ensuring that the clamping plate 205 always maintains a straight line movement. The locking block 208 set on the side of the clamping plate 205 is displaced and locks the docking block 301, thereby fixing the position of the drive motor 3. When the drive motor 3 is working, the drive motor 3 drives the worm gear 104 to rotate and drive the valve plate 101 to rotate, completing the opening and closing operation of the valve body 1. It should be noted that the valve body 1 is a triple eccentric valve. Specifically, the valve stem axis is offset from the center of the valve plate 101. Secondly, the sealing surface cone angle offset and the inclined surface geometric asymmetry design of the valve body 1 achieve a high-performance valve with zero friction opening and closing and high pressure sealing.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A triple-eccentric structure for a variable frequency electric vacuum butterfly valve, characterized in that, include: A valve body (1) is provided with a valve plate (101) inside the valve body (1) and a worm gear (104) is provided with a lateral rotation on the top of the valve body (1) and the worm gear (104) is engaged with the valve plate (101). The fixing part (2) is provided on the top of the valve body (1). The fixing part (2) also has a connecting frame (201) provided on the top of the valve body (1). The connecting frame (201) has a drive rod (203) rotatably arranged inside, and a clamping plate (205) is slidably arranged inside. The drive rod (203) passes through the clamping plate (205) and is threadedly connected to the clamping plate (205). The drive rod (203) rotates to drive the clamping plate (205) to move laterally. A drive motor (3) is provided on the side of the connecting frame (201). A docking block (301) is provided on the side of the drive motor (3). The docking block (301) is engaged with the clamping plate (205). The clamping plate (205) moves laterally to engage and fix the position of the drive motor (3).

2. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: The valve body (1) also has a transmission box (103) disposed on the top of the valve body (1). The side of the rotating shaft of the valve plate (101) is provided with a transmission tooth (102). The transmission tooth (102) meshes with the worm (104). The transmission tooth (102) is located inside the transmission box (103). The worm (104) is laterally rotatably disposed inside the transmission box (103).

3. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 2, characterized in that: One end of the worm (104) extends to the outside of the transmission box (103). A recessed groove (105) is provided at one end of the worm (104). A ring of teeth is arranged around the inside of the groove (105). The groove (105) is engaged with the output shaft (302).

4. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: The fixing part (2) also has a groove (202) that is laterally opened inside the connecting frame (201), and the clamp (205) is embedded in the groove (202) and slidably connected to the connecting frame (201).

5. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: There are two clamps (205), which are mirror-symmetrically arranged along the central axis of the connecting frame (201).

6. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: The fixing part (2) also has a threaded groove (206) opened inside the clamp (205), the drive rod (203) passes through the threaded groove (206) laterally and is threadedly nested with the clamp (205), and the drive rod (203) extends to the outside of the connecting frame (201) and is provided with a hexagonal bolt.

7. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: The fixing part (2) also has a slide rod (204) arranged laterally inside the connecting frame (201). The clamping plate (205) has a sliding hole (207) opened laterally inside. The slide rod (204) passes through the sliding hole (207) and is slidably connected to the clamping plate (205).

8. The triple-eccentric structure of a variable frequency electric vacuum butterfly valve according to claim 1, characterized in that: The fixing part (2) also has a locking block (208) provided on the side of the clamp (205), which engages with the docking block (301).

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