Automatic cleaning control equipment for heat exchanger of power plant

Abstract

The utility model discloses automatic cleaning control equipment for a heat exchanger of a power plant, and belongs to the technical field of automatic cleaning control equipment for heat exchangers. Comprising a bottom plate and a rack, the rack is installed at the top end of the bottom plate, a disc is arranged outside the bottom plate, three sets of first circular frames are installed at the top end of the disc at equal intervals, and second circular frames are installed at the positions, on one sides of the first circular frames, of the top end of the disc. The angle of the automatic cleaning control equipment for the heat exchanger can be conveniently adjusted for cleaning, the cleaning range of the automatic cleaning control equipment for the heat exchanger is enlarged, multiple groups of heat exchangers can be conveniently and conveniently cleaned in sequence through rotation, the clamping and positioning convenience of the automatic cleaning control equipment for the heat exchanger is improved, and the cleaning efficiency is improved. And the cleaning efficiency of the heat exchanger automatic cleaning control equipment is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of automatic cleaning control equipment for heat exchangers, specifically an automatic cleaning control equipment for heat exchangers in power plants. Background Technology

[0002] During long-term operation, heat exchangers are prone to fouling and clogging, which can seriously affect heat exchange efficiency. Automatic cleaning control equipment can automatically clean during operation, effectively preventing fouling and keeping the heat exchange surface clean, thereby improving thermal efficiency. Traditional heat exchangers require regular manual cleaning, which is not only time-consuming and labor-intensive, but also increases maintenance costs. Automatic cleaning control equipment can automatically complete the cleaning work, reducing the frequency and cost of manual cleaning.

[0003] As disclosed in the authorization announcement number CN221037064U, an automatic cleaning device for heat exchangers in power plants includes a heat exchanger body, a base frame, a control device, and a rotary drive device. The base frame is generally square in shape and is made of corrosion-resistant stainless steel. The square base frame has a hollow design to facilitate the flow of water during cleaning. The stainless steel base frame has high strength and will not rust or corrode under long-term cleaning work. A lifting drive device is provided on the top of the base frame.

[0004] Although it enables the heat exchanger body to rotate through the active and driven rollers in the rotary drive device, and the scanning imaging device to scan the core of the heat exchanger body to be cleaned to obtain a three-dimensional image of the core of the heat exchanger body to be cleaned, the control device controls the lifting drive device, horizontal drive device, and axial drive device to adjust the position of the nozzle up, down, left, right, forward and backward, so as to achieve fast, accurate and efficient cleaning of the heat exchanger body, reducing the requirements for the operator's skill level and improving safety and cleaning efficiency.

[0005] However, this does not solve the problem that existing automatic cleaning control equipment for heat exchangers generally does not allow for convenient angle adjustment during cleaning, which affects the cleaning range of the automatic cleaning control equipment. It is also not convenient to rotate the equipment to clean multiple heat exchangers sequentially, which greatly affects the convenience of clamping and positioning of the automatic cleaning control equipment and the cleaning efficiency of the automatic cleaning control equipment. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic cleaning control device for heat exchangers in power plants, in order to solve the problems mentioned in the background art, such as the inconvenience of adjusting the angle for cleaning, which affects the cleaning range of the automatic cleaning control device, the inconvenience of rotating to clean multiple heat exchangers sequentially, the inconvenience of clamping and positioning of the automatic cleaning control device, and the impact on the cleaning efficiency of the automatic cleaning control device.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] An automatic cleaning control device for heat exchangers in a power plant includes a base plate and a frame. A frame is mounted on the top of the base plate. A disc is disposed on the outside of the base plate. Three sets of first circular frames are mounted at equal intervals on the top of the disc. A second circular frame is mounted on the top of the disc on one side of each of the first circular frames. An X-axis lead screw moving assembly is mounted on the top of the frame. A support frame is mounted on the top of the X-axis lead screw moving assembly. A Y-axis lead screw moving assembly is mounted on the side wall of the support frame. A Z-axis lead screw moving assembly is mounted on the side wall of the Y-axis lead screw moving assembly. A side plate is mounted on the side wall of the Z-axis lead screw moving assembly. A flip plate is disposed on the outside of the side plate. An L-shaped plate is mounted on the side wall of the flip plate. A nozzle is movably mounted inside the L-shaped plate and extends through the L-shaped plate to its outside. A first cylinder is movably mounted on the side wall of the side plate. A first shaft is movably mounted on the output end of the first cylinder. The first cylinder is movably connected to the flip plate via the first shaft.

[0009] Optionally, a second axis is movably mounted on the side of the flip plate away from the first axis, and the flip plate is movably connected to the side plate through the second axis.

[0010] Optionally, a servo motor is installed at the top of the L-shaped plate, and the output end of the servo motor is connected to the nozzle.

[0011] Optionally, three sets of second cylinders with equal spacing are installed on the side walls of both the first and second circular frames.

[0012] Optionally, the output ends of the second cylinders all pass through the first circular frame and the second circular frame and extend to their outside, and the output ends of the second cylinders are all equipped with U-shaped frames.

[0013] Optionally, each end of the U-shaped frame away from the second cylinder is movably equipped with an electric roller, and a heat exchanger body is movably installed between multiple sets of electric rollers.

[0014] Optionally, a rotating shaft is installed at the center of the bottom end of the disk, the rotating shaft extends to the top of the base plate and is movably connected thereto, and a large gear is fitted on the surface of the rotating shaft.

[0015] Optionally, a stepper motor is installed on the top side of the base plate away from the rotation axis, and a pinion is installed at the output end of the stepper motor.

[0016] Optionally, the pinion meshes with the gear, and the bottom end of the outer disk of the gear is provided with an annular groove.

[0017] Optionally, two sets of support slides are installed at the top of the outer base plate of the stepper motor, and the support slides are slidably connected to the annular groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the automatic cleaning control equipment for heat exchangers not only realizes the convenient adjustment of the cleaning angle, increases the cleaning range, and facilitates the sequential cleaning of multiple heat exchangers by rotation, but also improves the convenience of clamping and positioning, and increases the cleaning efficiency.

[0019] The X-axis lead screw moving assembly drives the support frame, Y-axis lead screw moving assembly, Z-axis lead screw moving assembly, side plate, tilting plate, L-shaped plate, and nozzle to move along the X-axis. The Y-axis lead screw moving assembly drives the Z-axis lead screw moving assembly, side plate, tilting plate, L-shaped plate, and nozzle to move along the Y-axis. The Z-axis lead screw moving assembly drives the side plate, tilting plate, L-shaped plate, and nozzle to move along the Z-axis, causing the nozzle to move to the surface of the heat exchanger to be cleaned. When cleaning of the inside of the heat exchanger is required, the first cylinder drives the first shaft to move, and the first shaft drives the tilting plate to rotate around the second axis. The rotating plate drives the L-shaped plate and nozzle to rotate at a certain angle, allowing the nozzle to enter the interior of the heat exchanger for spray cleaning. When a certain angle needs to be rotated, the servo motor drives the nozzle to rotate. When a certain angle needs to be rotated in the heat exchanger, the electric roller drives the heat exchanger to rotate, allowing the nozzle to clean multiple positions inside the heat exchanger. This enables convenient angle adjustment for cleaning in the automatic heat exchanger cleaning control equipment, increases the cleaning range of the automatic heat exchanger cleaning control equipment, and improves the convenience of cleaning.

[0020] The second cylinder drives the electric rollers and U-shaped frame to retract and insert the heat exchanger. The second cylinder is then opened in the reverse direction, allowing multiple sets of electric rollers to center-position and clamp the heat exchanger. This facilitates convenient center-positioning and clamping of the heat exchanger, improving the ease of clamping and positioning in the automatic heat exchanger cleaning control equipment.

[0021] When multiple heat exchangers need to be cleaned, the heat exchangers to be cleaned are placed on the surface of the U-shaped frame and clamped. A stepper motor drives a small gear to rotate, which in turn drives a large gear to rotate. The large gear drives a rotating shaft, a disc, a first circular frame, a second circular frame, an electric roller, the U-shaped frame, and the heat exchangers to rotate. This causes the cleaned heat exchangers to rotate to one side, and the heat exchangers to be cleaned to rotate to the cleaning area. This facilitates the sequential cleaning of multiple heat exchangers and improves the cleaning efficiency of the automatic heat exchanger cleaning control equipment. Attached Figure Description

[0022] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a front view structural diagram of the present utility model;

[0025] Figure 3 This is a front view structural diagram of the L-shaped plate of this utility model;

[0026] Figure 4 This is a three-dimensional structural diagram of the base plate of this utility model;

[0027] Figure 5 This is a schematic diagram of the three-dimensional structure of the disk of this utility model;

[0028] Figure 6 This is a three-dimensional structural diagram of the first circular frame of this utility model.

[0029] Figure label:

[0030] 1. Base plate; 2. Frame; 3. Disc; 4. X-axis lead screw moving assembly; 5. Support frame; 6. Y-axis lead screw moving assembly; 7. Z-axis lead screw moving assembly; 8. Side plate; 9. Flip plate; 10. L-shaped plate; 11. Nozzle; 12. First cylinder; 13. First shaft; 14. Second shaft; 15. Servo motor; 16. Stepper motor; 17. Pinion; 18. Rotary shaft; 19. Large gear; 20. Annular groove; 21. Support slide head; 22. First circular frame; 23. Second circular frame; 24. Second cylinder; 25. Electric roller; 26. Heat exchanger body; 27. U-shaped frame.

[0031] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0032] The automatic cleaning control device for heat exchangers in power plants provided by this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0033] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0034] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0035] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0036] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0037] like Figures 1 to 6 As shown, an automatic cleaning control device for heat exchangers in a power plant includes a base plate 1 and a frame 2. The frame 2 is mounted on the top of the base plate 1. A disc 3 is arranged on the outside of the base plate 1. Three sets of first circular frames 22 with equal spacing are mounted on the top of the disc 3. A second circular frame 23 is mounted on the top of the disc 3 on one side of each first circular frame 22. An X-axis lead screw moving assembly 4 is mounted on the top of the frame 2. A support frame 5 is mounted on the top of the X-axis lead screw moving assembly 4. A Y-axis lead screw moving assembly 6 is mounted on the side wall of the support frame 5. A Z-axis lead screw moving assembly 7 is mounted on the side wall of the Y-axis lead screw moving assembly 6. A side plate 8 is mounted on the side wall of the Z-axis lead screw moving assembly 7. A flip plate 9 is provided on the outside of the side plate 8. An L-shaped plate 10 is installed on the side wall of the flip plate 9. A nozzle 11 is movably installed inside the L-shaped plate 10 and extends through the L-shaped plate 10 to its outside. A first cylinder 12 is movably installed on the side wall of the side plate 8. A first shaft 13 is movably installed at the output end of the first cylinder 12. The first cylinder 12 is movably connected to the flip plate 9 through the first shaft 13. A second shaft 14 is movably installed on the side of the flip plate 9 away from the first shaft 13. The flip plate 9 is movably connected to the side plate 8 through the second shaft 14. A servo motor 15 is installed at the top of the L-shaped plate 10. The output end of the servo motor 15 is connected to the nozzle 11.

[0038] When using the automatic heat exchanger cleaning control equipment, open the X-axis lead screw moving assembly 4. Supported by the frame 2, the X-axis lead screw moving assembly 4 drives the support frame 5, Y-axis lead screw moving assembly 6, Z-axis lead screw moving assembly 7, side plate 8, tilting plate 9, L-shaped plate 10, and nozzle 11 to move along the X-axis. Open the Y-axis lead screw moving assembly 6. Supported by the support frame 5, the Y-axis lead screw moving assembly 6 drives the Z-axis lead screw moving assembly 7, side plate 8, tilting plate 9, L-shaped plate 10, and nozzle 11 to move along the Y-axis. Open the Z-axis lead screw moving assembly 7. Supported by the Y-axis lead screw moving assembly 6, the Z-axis lead screw moving assembly 7 drives the side plate 8, tilting plate 9, L-shaped plate 10, and nozzle 11 to move along the Z-axis, causing the nozzle 11 to move to the surface of the heat exchanger to be cleaned. When cleaning the inside of the heat exchanger is required, open the first cylinder 12. With the support of the first cylinder 12, the first shaft 13 is moved. The first shaft 13 drives the tilting plate 9 to rotate around the second shaft 14. The tilting plate 9 drives the L-shaped plate 10 and the nozzle 11 to rotate at a certain angle, so that the nozzle 11 enters the interior of the heat exchanger for spray cleaning. When a certain angle needs to be rotated, the servo motor 15 is turned on. With the support of the L-shaped plate 10, the servo motor 15 drives the nozzle 11 to rotate. When a certain angle needs to be rotated in the heat exchanger, multiple sets of electric rollers 25 are turned on. With the support of the U-shaped frame 27, the electric rollers 25 drive the heat exchanger to rotate, so that the nozzle 11 cleans the interior of the heat exchanger at multiple positions. This realizes the convenient adjustment of the angle for cleaning in the automatic heat exchanger cleaning control equipment, increases the cleaning range of the automatic heat exchanger cleaning control equipment, and improves the convenience of cleaning in the automatic heat exchanger cleaning control equipment.

[0039] Three sets of second cylinders 24 with equal spacing are installed on the side walls of the first circular frame 22 and the second circular frame 23. The output ends of the second cylinders 24 extend through the first circular frame 22 and the second circular frame 23 to their outside. The output ends of the second cylinders 24 are all equipped with U-shaped frames 27.

[0040] Electric rollers 25 are movably mounted on the end of the U-shaped frame 27 away from the second cylinder 24, and heat exchanger bodies 26 are movably mounted between multiple sets of electric rollers 25.

[0041] When the heat exchanger needs to be clamped, multiple sets of second cylinders 24 are opened. Supported by the first circular frame 22 and the second circular frame 23, the second cylinders 24 drive the electric rollers 25 and the U-shaped frame 27 to retract and place the heat exchanger in. The second cylinders 24 are then opened in the opposite direction, so that the multiple sets of electric rollers 25 can perform center positioning and clamping of the heat exchanger. This facilitates convenient center positioning and clamping of the heat exchanger, and improves the convenience of clamping and positioning of the automatic heat exchanger cleaning control equipment.

[0042] A rotating shaft 18 is installed at the center of the bottom end of the disc 3. The rotating shaft 18 extends to the top of the base plate 1 and is movably connected thereto. A large gear 19 is fitted on the surface of the rotating shaft 18. A stepper motor 16 is installed on the top of the base plate 1 away from the rotating shaft 18. A small gear 17 is installed at the output end of the stepper motor 16. The small gear 17 meshes with the large gear 19. An annular groove 20 is provided at the bottom end of the outer disc 3 of the large gear 19.

[0043] Two sets of support slides 21 are installed on the top of the outer base plate 1 of the stepper motor 16, and the support slides 21 are slidably connected to the annular groove 20.

[0044] When multiple heat exchangers need to be cleaned, the heat exchangers to be cleaned are placed on the surface of the U-shaped frame 27 and clamped. The stepper motor 16 is turned on, and with the support of the base plate 1, the stepper motor 16 drives the pinion 17 to rotate. With the meshing of the pinion 17 and the large gear 19, the pinion 17 drives the large gear 19 to rotate. Under the sliding support of the annular groove 20 and the support slide head 21, the large gear 19 drives the rotating shaft 18, the disc 3, the first circular frame 22, the second circular frame 23, the electric roller 25, the U-shaped frame 27, and the heat exchangers to rotate. This allows the cleaned heat exchangers to rotate to one side, and the heat exchangers to be cleaned to rotate to the cleaning area. This facilitates the sequential cleaning of multiple heat exchangers and enables the automatic heat exchanger cleaning control equipment to conveniently rotate and clean multiple heat exchangers sequentially, improving the cleaning efficiency of the automatic heat exchanger cleaning control equipment.

[0045] The working principle of the technical solution provided by this utility model is as follows: When using the automatic cleaning control equipment for heat exchangers, the X-axis lead screw moving assembly 4 drives the support frame 5, Y-axis lead screw moving assembly 6, Z-axis lead screw moving assembly 7, side plate 8, flip plate 9, L-shaped plate 10, and nozzle 11 to move along the X-axis; the Y-axis lead screw moving assembly 6 drives the Z-axis lead screw moving assembly 7, side plate 8, flip plate 9, L-shaped plate 10, and nozzle 11 to move along the Y-axis; and the Z-axis lead screw moving assembly 7 drives the side plate 8, flip plate 9, and L-shaped plate 10... The nozzle 11 moves along the Z-axis to the surface of the heat exchanger to be cleaned. When cleaning the inside of the heat exchanger is required, the first cylinder 12 drives the first shaft 13 to move. The first shaft 13 drives the tilting plate 9 to rotate around the second shaft 14. The tilting plate 9 drives the L-shaped plate 10 and the nozzle 11 to rotate at a certain angle, allowing the nozzle 11 to enter the interior of the heat exchanger for spray cleaning. When a certain angle needs to be rotated, the servo motor 15 drives the nozzle 11 to rotate. When the heat exchanger rotates at a certain angle, the electric rollers 25 drive it to rotate, allowing the nozzles 11 to clean the interior of the heat exchanger from multiple positions. When the heat exchanger needs to be clamped, the second cylinder 24 retracts the electric rollers 25 and the U-shaped frame 27 to place the heat exchanger inside. Reversing the direction of the second cylinder 24 allows multiple sets of electric rollers 25 to center-position and clamp the heat exchanger, facilitating convenient center-positioning and clamping. When multiple heat exchangers need cleaning, the heat exchangers to be cleaned are placed separately... The heat exchanger is clamped on the surface of the U-shaped frame 27. The stepper motor 16 drives the pinion 17 to rotate, which in turn drives the large gear 19 to rotate. The large gear 19 drives the rotating shaft 18, the disc 3, the first circular frame 22, the second circular frame 23, the electric roller 25, the U-shaped frame 27, and the heat exchanger to rotate. This causes the cleaned heat exchanger to rotate to one side, and the heat exchanger to be cleaned to rotate to the cleaning area. This facilitates the sequential cleaning of multiple heat exchangers, thus completing the use of the automatic heat exchanger cleaning control equipment.

[0046] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An automatic cleaning control device for heat exchangers in power plants, characterized in that: The system includes a base plate (1) and a frame (2). The frame (2) is mounted on the top of the base plate (1). A disc (3) is provided on the outside of the base plate (1). Three sets of first circular frames (22) with equal spacing are mounted on the top of the disc (3). A second circular frame (23) is mounted on the top of the disc (3) on one side of each of the first circular frames (22). An X-axis lead screw moving assembly (4) is mounted on the top of the frame (2). A support frame (5) is mounted on the top of the X-axis lead screw moving assembly (4). A Y-axis lead screw moving assembly (6) is mounted on the side wall of the support frame (5). A Y-axis lead screw moving assembly (6) is mounted on the side wall of the Y-axis lead screw moving assembly (6). The assembly is equipped with a Z-axis lead screw moving component (7), and a side plate (8) is installed on the side wall of the Z-axis lead screw moving component (7). A flip plate (9) is provided on the outside of the side plate (8). An L-shaped plate (10) is installed on the side wall of the flip plate (9). A nozzle (11) is movably installed inside the L-shaped plate (10) and extends through the L-shaped plate (10) to its outside. A first cylinder (12) is movably installed on the side wall of the side plate (8). A first shaft (13) is movably installed at the output end of the first cylinder (12). The first cylinder (12) is movably connected to the flip plate (9) through the first shaft (13).

2. The automatic cleaning control equipment for power plant heat exchangers according to claim 1, characterized in that: The flip plate (9) is movably mounted with a second shaft (14) on the side away from the first shaft (13), and the flip plate (9) is movably connected to the side plate (8) through the second shaft (14).

3. The automatic cleaning control equipment for power plant heat exchangers according to claim 1, characterized in that: A servo motor (15) is installed at the top of the L-shaped plate (10), and the output end of the servo motor (15) is connected to the nozzle (11).

4. The automatic cleaning control equipment for power plant heat exchangers according to claim 1, characterized in that: Three sets of second cylinders (24) with equal spacing are installed on the side walls of the first circular frame (22) and the second circular frame (23).

5. The automatic cleaning control equipment for power plant heat exchangers according to claim 4, characterized in that: The output ends of the second cylinder (24) all extend through the first circular frame (22) and the second circular frame (23) to their outside, and the output ends of the second cylinder (24) are all equipped with U-shaped frames (27).

6. The automatic cleaning control equipment for power plant heat exchangers according to claim 5, characterized in that: Electric rollers (25) are movably mounted on the end of the U-shaped frame (27) away from the second cylinder (24), and heat exchanger bodies (26) are movably mounted between multiple sets of electric rollers (25).

7. The automatic cleaning control equipment for power plant heat exchangers according to claim 1, characterized in that: A rotating shaft (18) is installed at the center of the bottom end of the disk (3). The rotating shaft (18) extends to the top of the base plate (1) and is movably connected thereto. A large gear (19) is fitted on the surface of the rotating shaft (18).

8. The automatic cleaning control equipment for power plant heat exchangers according to claim 7, characterized in that: A stepper motor (16) is installed on the top of the base plate (1) away from the rotating shaft (18), and a pinion (17) is installed at the output end of the stepper motor (16).

9. The automatic cleaning control equipment for power plant heat exchangers according to claim 8, characterized in that: The small gear (17) meshes with the large gear (19), and the bottom end of the outer disk (3) of the large gear (19) is provided with an annular groove (20).

10. The automatic cleaning control equipment for power plant heat exchangers according to claim 8, characterized in that: Two sets of support slides (21) are installed on the top of the outer base plate (1) of the stepper motor (16), and the support slides (21) are slidably connected to the annular groove (20).

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