Electric auxiliary valve opening and closing tool

Abstract

The utility model discloses an electric auxiliary valve opening and closing tool, and belongs to the technical field of valves. The electric auxiliary valve opening and closing tool comprises a connecting assembly, a driving assembly and a connector assembly, the driving assembly is arranged above the connecting assembly, the connector assembly is arranged below the connecting assembly, the driving assembly is used for driving a driving shaft in the connecting assembly to rotate, the connector assembly is used for being connected with a valve, and the connector assembly comprises a mounting cylinder; four first sliding grooves are formed in each of the top end and the bottom end of the interior of the mounting cylinder, a convex block is slidably connected between a pair of first sliding grooves, one end of the convex block penetrates through the mounting cylinder and extends to the outside, the outer wall of one end of the convex block is in sliding fit with the inner wall of the through hole of the mounting cylinder, a groove is formed in one end of the convex block, and a polyurethane non-slip mat is arranged in the groove; a wedge-shaped block is mounted at the end, away from the groove, of the protruding block, a hydraulic rod is mounted at the center of the bottom end in the mounting cylinder, and the movable end of the hydraulic rod is connected with a push block.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an electric auxiliary valve switching tool. Background Technology

[0002] Many systems in a power plant require precise control of fluid flow. For example, in the feedwater system, valves are opened and closed to regulate the amount of water entering the boiler, ensuring a stable water level and thus guaranteeing the output and quality of steam to meet power generation needs. Additionally, power plants have multiple operating modes and backup systems. During equipment maintenance, fault switching, or when different operating conditions require different systems, valves need to be opened and closed to switch between them. This includes switching operating equipment from one pipeline to a backup pipeline, or switching from one water supply source to another.

[0003] Based on the above, the inventors have discovered the following problems: In the daily operation of power plants, valve switching is a high-frequency operation. Currently, it relies on iron and brass F-type wrenches and hex wrenches. Manual operation not only consumes a lot of manpower, but also requires operators to devote a lot of energy each time they open or close a valve, resulting in very low work efficiency. Especially when dealing with large valves that require greater operating force, or when encountering corroded valves, even if operators exert all their strength, they often find it difficult to complete the opening and closing action smoothly, seriously affecting the normal maintenance process of power plant equipment and potentially delaying equipment fault diagnosis and repair work.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an electric auxiliary valve switching tooling in order to achieve a more practical value. Utility Model Content

[0005] The purpose of this utility model is to provide an electric auxiliary valve switching tool to solve the problems mentioned in the background art.

[0006] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0007] An electric auxiliary valve switching fixture includes a connecting assembly, a driving assembly, and a connector assembly. The driving assembly is positioned above the connecting assembly, and the connector assembly is positioned below the connecting assembly. The driving assembly drives a drive shaft within the connecting assembly to rotate. The connector assembly is used to connect to a valve. The connector assembly includes a mounting cylinder. Four first sliding grooves are formed at both the top and bottom of the mounting cylinder. A protrusion is slidably connected between a pair of first sliding grooves. One end of the protrusion extends through the mounting cylinder to the outside, and the outer wall of one end of the protrusion slidably engages with the inner wall of a through hole in the mounting cylinder. A groove is formed at one end of the protrusion, and a polyurethane anti-slip pad is provided within the groove. A wedge-shaped block is installed at the end of the protrusion away from the groove. A hydraulic rod is installed at the center of the bottom of the mounting cylinder, and a push block is connected to the movable end of the hydraulic rod.

[0008] Furthermore, the four sides of the outer wall of the push block are inclined, and the four sides of the outer wall of the push block are respectively attached to one side of the wedge block.

[0009] The beneficial effect of adopting the above-mentioned further solution is that, by setting a hydraulic rod, when the hydraulic rod pushes the push block to move upward, since the four sides of the outer wall of the push block are inclined and fit against one side of the wedge block, the push block will generate an outward pushing force on the wedge block, thereby driving the protrusion to slide outward along the first slide groove, so that the polyurethane anti-slip pad at one end of the protrusion can tightly contact the inner wall of the valve handwheel and lock the valve handwheel, thus realizing a firm connection between the connector assembly and the valve.

[0010] Furthermore, the connecting assembly includes a hollow cylinder, with a drive shaft rotatably connected inside the hollow cylinder. The bottom end of the drive shaft extends through the hollow cylinder to the outside and has a slot. The connecting assembly also includes a socket, with the outer wall of the socket near the top end fitting with the inner wall of the slot with a clearance, and the bottom end of the socket being fixedly connected to the top end of the mounting cylinder.

[0011] The beneficial effect of adopting the above-mentioned further solution is that, since the drive shaft is rotated inside the hollow cylinder and the slot and socket at the bottom of the drive shaft cooperate, the connection of the connecting component and the connector component is realized. The socket is fixedly connected to the mounting cylinder. When the drive component drives the drive shaft to rotate, the power can be stably transmitted to the connector component, thereby driving the valve to open or close.

[0012] Furthermore, square grooves are provided on both sides of the inner wall of the slot, and a pair of first cavities are provided inside the socket. A second sliding groove is provided at the top and bottom of the first cavity. A block is slidably connected between the pair of second sliding grooves. A first spring is connected to one end of the block. The first spring is fixedly connected to one side of the inner wall of the first cavity at the end away from the block. The block extends through the socket to the outside at the end away from the first spring and slides with the through hole of the socket. The block extends into the square groove at the end away from the first spring.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the square groove on the inner wall of the slot and the square block inside the socket are fitted with a gap. When the socket is inserted into the slot, the square block can automatically be locked into the square groove under the action of the first spring, preventing relative sliding between the socket and the slot and ensuring the reliability of the connecting components when transmitting power.

[0014] Furthermore, the drive shaft has a second cavity on both sides near the bottom end, and adjacent second cavities are connected to square grooves. The top and bottom of the second cavity are both provided with third sliding grooves. A circular plate is slidably connected between a pair of third sliding grooves. A circular hole is provided inside the circular plate, and a circular rod is installed inside the circular hole. One end of the circular rod abuts against the block. A second spring is sleeved on the outside of the end of the circular rod near the block. The two ends of the second spring are fixedly connected to one side of the circular plate and one side of the inner wall of the second cavity, respectively. The end of the circular rod away from the block passes through the drive shaft and slides in cooperation with the through hole of the drive shaft.

[0015] The beneficial effect of adopting the above-mentioned further solution is that when the end of the round rod away from the block is squeezed into the second cavity, the round plate slides in the third groove in the second cavity, the end of the round rod abuts against the block and is fitted with a second spring, thereby causing the round plate to compress the second spring. At the same time, the round rod squeezes the block to separate it from the square groove, causing the block to retract back into the socket. The connector assembly can be disassembled and replaced according to the valve handwheel of different sizes. The connector assembly has various specifications.

[0016] Furthermore, the drive assembly includes a drive base, the bottom end of which is fixedly connected to the top end of the hollow cylinder. An internal gear ring is installed inside the drive base, and a retainer is provided inside the internal gear ring. The top and bottom ends of the retainer are fixedly connected to the top and bottom ends of the drive base, respectively. A first rotating shaft is rotatably connected to the center of the retainer. The bottom end of the first rotating shaft is connected to the top end of the drive shaft. A sun gear is sleeved on the outside of the first rotating shaft. Three second rotating shafts are rotatably connected inside the retainer, and planetary gears are sleeved on the outside of the three second rotating shafts. The sun gears and planetary gears mesh with each other, and the planetary gears mesh with the internal gear ring. A brushless DC motor is installed at the upper end of the drive base, and the output end of the brushless DC motor is connected to the first rotating shaft.

[0017] The beneficial effect of adopting the above-mentioned further solution is that by setting a brushless DC motor and using a planetary gear transmission structure for the drive component, the brushless DC motor drives the sun gear to rotate through the first rotating shaft. The sun gear meshes with the planetary gears and the planetary gears with the internal gear ring, achieving a larger transmission ratio. This enables a larger output torque to be obtained with a smaller motor power, ensuring a powerful and stable drive of the valve.

[0018] Furthermore, a pressure sensor, a position sensor, and an angle sensor are sequentially mounted on the outside of the drive shaft from top to bottom.

[0019] The beneficial effects of adopting the above-mentioned further solution are that, through the combined use of pressure sensors, position sensors, and angle sensors, a control panel is installed on the front of the hollow cylinder. The brushless DC motor, pressure sensor, position sensor, and angle sensor are electrically connected to the control panel via wires. The pressure sensor can monitor the pressure on the drive shaft in real time during rotation, thereby judging the resistance during valve opening and closing, so as to adjust the output power of the drive component in time to prevent overload damage. The position sensor can accurately detect the position of the drive shaft, which helps to accurately control the opening and closing state of the valve and ensure that the valve can be accurately opened or closed to the designated position. The angle sensor can measure the rotation angle of the drive shaft, providing the operator with accurate valve opening information, which facilitates precise control and adjustment of the valve.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: This electric auxiliary valve switching fixture, by setting a hydraulic rod, when the hydraulic rod pushes the push block upward, since the four sides of the outer wall of the push block are inclined and fit against one side of the wedge block, the push block will generate an outward pushing force on the wedge block, thereby driving the protrusion to slide outward along the first sliding groove, so that the polyurethane anti-slip pad at one end of the protrusion can tightly contact the inner wall of the valve handwheel and lock the valve handwheel, ensuring a tight fit during operation and preventing slippage. This achieves a firm connection between the connector assembly and the valve. The brushless DC motor is started, which drives the sun gear to rotate through the first rotating shaft. The sun gear meshes with the planetary gears, and the planetary gears mesh with the internal gear ring to achieve a large transmission ratio, which can obtain a large output torque with a small motor power. This allows the drive shaft to rotate inside the hollow cylinder. Due to the cooperation between the slot and the socket at the bottom of the drive shaft, and the fixed connection between the socket and the mounting cylinder, the valve is driven powerfully and stably. Attached Figure Description

[0021] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0022] Figure 1 A three-dimensional structural schematic diagram of an electric auxiliary valve switching fixture provided by this utility model;

[0023] Figure 2 An exploded three-dimensional cross-sectional view of the drive shaft of an electric auxiliary valve switching fixture provided by this utility model.

[0024] Figure 3 An exploded three-dimensional structural diagram of the connecting assembly of an electric auxiliary valve switching tooling provided by this utility model;

[0025] Figure 4 A front cross-sectional view of the mounting cylinder of an electric auxiliary valve switching tool provided by this utility model;

[0026] Figure 5 This is a partial front cross-sectional view of the drive shaft and socket of an electric auxiliary valve switching fixture provided by this utility model.

[0027] In the diagram: 1. Connecting assembly; 11. Hollow cylinder; 12. Drive shaft; 13. Pressure sensor; 14. Position sensor; 15. Angle sensor; 16. Slot; 17. Socket; 18. Square groove; 19. Block; 110. First spring; 111. Round plate; 112. Round rod; 113. Second spring; 2. Drive assembly; 21. Drive base; 22. Brushless DC motor; 23. Internal gear ring; 24. Cage; 25. First rotating shaft; 26. Sun gear; 27. Planetary gear; 3. Connector assembly; 31. Mounting cylinder; 32. Protrusion; 33. Groove; 34. Wedge block; 35. Hydraulic rod; 36. Push block. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0030] Example 1

[0031] Please see Figures 1-5This utility model provides a technical solution: an electric auxiliary valve switching fixture, including a connecting assembly 1, a driving assembly 2, and a connecting head assembly 3. The driving assembly 2 is disposed above the connecting assembly 1, and the connecting head assembly 3 is disposed below the connecting assembly 1. The driving assembly 2 is used to drive the driving shaft 12 inside the connecting assembly 1 to rotate. The connecting head assembly 3 is used to connect with the valve. The connecting head assembly 3 includes a mounting cylinder 31. The top and bottom ends of the mounting cylinder 31 are provided with four first sliding grooves. A protrusion 32 is slidably connected between a pair of first sliding grooves. One end of the protrusion 32 extends through the mounting cylinder 31 to the outside, and the outer wall of one end of the protrusion 32 slides against the inner wall of the through hole of the mounting cylinder 31. One end of the protrusion 32 is provided with a groove 33, and a polyurethane anti-slip pad is provided in the groove 33. The protrusion 32 is located away from the groove 33. A wedge block 34 is installed at one end, and a hydraulic rod 35 is installed at the center of the bottom of the inner end of the mounting cylinder 31. The movable end of the hydraulic rod 35 is connected to a push block 36. The four sides of the outer wall of the push block 36 are inclined, and the four sides of the outer wall of the push block 36 are respectively in contact with one side of the wedge block 34. By setting the hydraulic rod 35, when the hydraulic rod 35 pushes the push block 36 upward, since the four sides of the outer wall of the push block 36 are inclined and in contact with one side of the wedge block 34, the push block 36 will generate an outward pushing force on the wedge block 34, thereby driving the protrusion 32 to slide outward along the first sliding groove, so that the polyurethane anti-slip pad at one end of the protrusion 32 can tightly contact the inner wall of the valve handwheel and lock the valve handwheel, ensuring a tight fit during operation and preventing slippage, thus achieving a firm connection between the connector assembly 3 and the valve.

[0032] 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.

[0033] Please see Figures 1-5This utility model provides a technical solution: the connecting component 1 includes a hollow cylinder 11, a drive shaft 12 is rotatably connected inside the hollow cylinder 11, the bottom end of the drive shaft 12 extends through the hollow cylinder 11 to the outside and has a slot 16. The connecting component 1 also includes a socket 17, the outer wall of the socket 17 near the top end is clearance-fitted with the inner wall of the slot 16, and the bottom end of the socket 17 is fixedly connected to the top end of the mounting cylinder 31. Square grooves 18 are provided on both sides of the inner wall of the slot 16. A pair of first cavities are provided inside the socket 17, the top and bottom of the first cavities are connected. Each end of the drive shaft 12 has a second sliding groove, and a block 19 is slidably connected between a pair of second sliding grooves. One end of the block 19 is connected to a first spring 110. The first spring 110 is fixedly connected to the inner wall of the first cavity at the end away from the block 19. The block 19 extends through the socket 17 to the outside at the end away from the first spring 110 and slides with the through hole of the socket 17. The block 19 extends into the interior of the square groove 18 at the end away from the first spring 110. The drive shaft 12 has a second cavity on both sides near the bottom end. The adjacent second cavities are connected to the square grooves. The second cavity is connected to the first cavity. A third sliding groove is provided at both the top and bottom of the cavity. A circular plate 111 is slidably connected between the two third sliding grooves. A circular hole is provided inside the circular plate 111, and a circular rod 112 is installed inside the hole. One end of the circular rod 112 abuts against the block 19. A second spring 113 is sleeved on the outside of the end of the circular rod 112 closest to the block 19. The two ends of the second spring 113 are fixedly connected to one side of the circular plate 111 and one side of the inner wall of the second cavity, respectively. The end of the circular rod 112 away from the block 19 passes through the drive shaft 12 and is connected to the drive shaft 12. The through hole of shaft 12 is slidably fitted. When the connector assembly 3 needs to be disassembled and replaced according to the valve handwheel of different sizes, when one end of the round rod 112 away from the square block 19 is pressed into the second cavity, the round plate 111 slides in the third groove in the second cavity. One end of the round rod 112 abuts against the square block 19 and is fitted with the second spring 113, so that the round plate 111 compresses the second spring 113. At the same time, the round rod 112 presses the square block 19 to separate it from the square groove 18, so that the square block 19 retracts back into the socket 17, and the connector assembly 3 is disassembled.

[0034] 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.

[0035] Please see Figures 1-5This utility model provides a technical solution: the drive assembly 2 includes a drive seat 21, the bottom end of which is fixedly connected to the top end of the hollow cylinder 11. An internal gear ring 23 is installed inside the drive seat 21, and a retainer 24 is provided inside the internal gear ring 23. The top and bottom ends of the retainer 24 are fixedly connected to the top and bottom ends of the drive seat 21, respectively. A first rotating shaft 25 is rotatably connected to the center of the retainer 24. The bottom end of the first rotating shaft 25 is connected to the top end of the drive shaft 12. A sun gear 26 is sleeved on the outside of the first rotating shaft 25. Three gears are rotatably connected inside the retainer 24. The second rotating shaft, and the three second rotating shafts are fitted with planetary gears 27. The sun gear 26 meshes with the planetary gears 27, and the planetary gears 27 mesh with the internal gear ring 23. A brushless DC motor 22 is mounted on the upper end of the drive base 21. The output end of the brushless DC motor 22 is connected to the first rotating shaft 25. A pressure sensor 13, a position sensor 14, and an angle sensor 15 are installed on the outside of the drive shaft 12 from top to bottom. When the brushless DC motor 22 is started, it drives the sun gear 26 to rotate through the first rotating shaft 25. The sun gear 26 meshes with the planetary gears 27 and the planetary gear ring 23. The gear 27 meshes with the internal gear ring 23 to achieve a large transmission ratio, enabling a large output torque with a small motor power. This allows the drive shaft 12 to rotate inside the hollow cylinder 11. The slot 16 at the bottom of the drive shaft 12 engages with the socket 17, and the socket 17 is fixedly connected to the mounting cylinder 31, ensuring a powerful and stable drive of the valve. Through the coordinated use of the pressure sensor 13, position sensor 14, and angle sensor 15, a control panel is mounted on the front of the hollow cylinder 11. The brushless DC motor 22, pressure sensor 13, position sensor 14, and angle sensor 15 are respectively connected to... The pressure sensor 13 is connected to the control panel via wires. It can monitor the pressure on the drive shaft 12 in real time during rotation, thereby judging the resistance during valve opening and closing. This allows for timely adjustment of the output power of the drive assembly 2 to prevent overload damage. The position sensor 14 can accurately detect the position of the drive shaft 12, which helps to precisely control the valve's opening and closing status and ensure that the valve can be accurately opened or closed to the designated position. The angle sensor 15 can measure the rotation angle of the drive shaft 12, providing operators with accurate valve opening information, which facilitates precise control and adjustment of the valve.

[0036] Specifically, the working principle of this electric auxiliary valve switching fixture is as follows: During use, the hydraulic rod 35 is activated, causing its movable end to push the push block 36 upwards. Since the four sides of the outer wall of the push block 36 are inclined and fit against one side of the wedge block 34, the push block 36 exerts an outward pushing force on the wedge block 34, thereby causing the protrusion 32 to slide outwards along the first groove. This allows the polyurethane anti-slip pad at one end of the protrusion 32 to tightly contact and lock the valve handwheel, ensuring a tight fit during operation and preventing slippage. This achieves a secure connection between the connector assembly 3 and the valve. The brushless DC motor 22 is then activated, driving the sun gear 26 to rotate via the first rotating shaft 25. The sun gear 26 meshes with the planetary gear 27, and the planetary gear 27 meshes with the internal gear ring 23, achieving a large transmission capacity. Compared to other methods, it can obtain a larger output torque with a smaller motor power, allowing the drive shaft 12 to rotate inside the hollow cylinder 11. Due to the cooperation between the slot 16 at the bottom of the drive shaft 12 and the socket 17, and the fixed connection between the socket 17 and the mounting cylinder 31, the valve is driven powerfully and stably. When the connector assembly 3 needs to be disassembled and replaced according to the valve handwheel of different sizes, when the end of the round rod 112 away from the square block 19 is pressed into the second cavity, the round plate 111 slides in the third groove in the second cavity. One end of the round rod 112 abuts against the square block 19 and is fitted with a second spring 113, thereby compressing the second spring 113 by the round plate 111. At the same time, the round rod 112 presses the square block 19 to separate it from the square groove 18, causing the square block 19 to retract back into the socket 17, and the connector assembly 3 can be disassembled.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. An electric auxiliary valve switching fixture, characterized in that, The assembly includes a connecting component (1), a driving component (2), and a connector assembly (3). The driving component (2) is positioned above the connecting component (1), and the connector assembly (3) is positioned below the connecting component (1). The driving component (2) is used to drive the driving shaft (12) inside the connecting component (1) to rotate. The connector assembly (3) is used to connect with a valve. The connector assembly (3) includes a mounting cylinder (31). The top and bottom ends of the mounting cylinder (31) are provided with four first sliding grooves, and a pair of first sliding grooves are slidably connected. A protrusion (32) is provided, one end of which extends through the mounting cylinder (31) to the outside, and the outer wall of one end of the protrusion (32) slides in cooperation with the inner wall of the through hole of the mounting cylinder (31). A groove (33) is provided at one end of the protrusion (32), and a polyurethane anti-slip pad is provided in the groove (33). A wedge block (34) is installed at the end of the protrusion (32) away from the groove (33). A hydraulic rod (35) is installed at the center of the bottom of the mounting cylinder (31), and a push block (36) is connected to the movable end of the hydraulic rod (35).

2. The electric auxiliary valve switching fixture according to claim 1, characterized in that, The four sides of the outer wall of the push block (36) are inclined, and the four sides of the outer wall of the push block (36) are respectively attached to one side of the wedge block (34).

3. The electric auxiliary valve switching fixture according to claim 2, characterized in that, The connecting assembly (1) includes a hollow cylinder (11), and a drive shaft (12) is rotatably connected inside the hollow cylinder (11). The bottom end of the drive shaft (12) extends through the hollow cylinder (11) to the outside and has a slot (16). The connecting assembly (1) also includes a socket (17). The outer wall of the socket (17) near the top end is clearance-fitted with the inner wall of the slot (16), and the bottom end of the socket (17) is fixedly connected to the top end of the mounting cylinder (31).

4. The electric auxiliary valve switching fixture according to claim 3, characterized in that, The inner wall of the slot (16) is provided with square grooves (18) on both sides. The socket (17) is provided with a pair of first cavities. The top and bottom of the first cavity are provided with second sliding grooves. A block (19) is slidably connected between the pair of second sliding grooves. One end of the block (19) is connected to a first spring (110). The first spring (110) is fixedly connected to one side of the inner wall of the first cavity at the end away from the block (19). The block (19) extends through the socket (17) to the outside at the end away from the first spring (110) and slides with the through hole of the socket (17). The block (19) extends into the square groove (18) at the end away from the first spring (110).

5. The electric auxiliary valve switching fixture according to claim 4, characterized in that, The drive shaft (12) has a second cavity on both sides near the bottom. The adjacent second cavities are connected to the square groove (18). The top and bottom of the second cavity are provided with a third sliding groove. A circular plate (111) is slidably connected between a pair of third sliding grooves. A circular hole is provided inside the circular plate (111). A circular rod (112) is installed inside the circular hole. One end of the circular rod (112) abuts against the block (19). A second spring (113) is sleeved on the outside of the end of the circular rod (112) near the block (19). The two ends of the second spring (113) are fixedly connected to one side of the circular plate (111) and one side of the inner wall of the second cavity, respectively. The end of the circular rod (112) away from the block (19) passes through the drive shaft (12) and slides with the through hole of the drive shaft (12).

6. The electric auxiliary valve switching fixture according to claim 1, characterized in that, The drive assembly (2) includes a drive base (21), the bottom end of which is fixedly connected to the top end of the hollow cylinder (11). An internal gear ring (23) is installed inside the drive base (21), and a retainer (24) is provided inside the internal gear ring (23). The top and bottom ends of the retainer (24) are fixedly connected to the top and bottom ends of the drive base (21) respectively. A first rotating shaft (25) is rotatably connected to the center of the retainer (24), and the bottom end of the first rotating shaft (25) is connected to the top end of the drive shaft (12). The first rotating shaft (25) is connected to the outside of which a sun gear (26) is fitted. The cage (24) is internally connected to three second rotating shafts. The three second rotating shafts are externally fitted with planetary gears (27). The sun gear (26) and the planetary gears (27) mesh with each other. The planetary gears (27) mesh with the internal gear ring (23). The upper end of the drive seat (21) is equipped with a brushless DC motor (22). The output end of the brushless DC motor (22) is connected to the first rotating shaft (25) for transmission.

7. The electric auxiliary valve switching fixture according to claim 3, characterized in that, A pressure sensor (13), a position sensor (14), and an angle sensor (15) are installed on the outside of the drive shaft (12) from top to bottom.

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