Aero-engine blade thermal imaging inspection device

Abstract

This utility model discloses a thermal imaging detection device for aero-engine blades, belonging to the field of thermal imaging detection. It includes a support frame; a detection component mounted on the support frame; and a cleaning component mounted on a first movable module. The cleaning component includes a first cleaning section mounted on the first movable module for preliminary brushing and cleaning of impurities on the carbon fiber plate surface, and a second cleaning section for removing any remaining fine impurities from the carbon fiber plate surface. This aero-engine blade thermal imaging detection device, by using a support frame with a cleaning component containing cleaning sections one and two, can specifically solve the problem of contaminants adhering to the surface of carbon fiber plates: cleaning section one initially brushes away impurities, and cleaning section two removes fine residues, preventing contaminants from altering the thermophysical properties of the plate surface and interfering with heat wave conduction. Pulse heating is applied evenly to the plate surface to prevent localized abnormal heat conduction and ensure uniform heat wave propagation inwards.

Description

Technical Field

[0001] This utility model relates to the field of thermal imaging detection technology, and in particular to a thermal imaging detection device for aero-engine blades. Background Technology

[0002] Carbon fiber reinforced resin matrix composites have become the mainstream material for modern aero-engine fan / low-pressure compressor blades. They all use carbon fiber sheets as the substrate and are made into complex structures adapted to the curved surface of the blade through layup design and molding process. At the same time, in order to improve the impact resistance of the leading edge, titanium alloy is laminated to the leading edge of the blade. In the manufacturing process of aero-engine blades, carbon fiber sheet substrates are prone to defects such as interlayer debonding, porosity, fiber wrinkles and resin cracking due to uneven layup tension, insufficient resin impregnation and improper molding temperature and pressure control. Therefore, it is necessary to perform infrared thermal non-destructive testing on carbon fiber sheet substrates and molded blades. Infrared thermal non-destructive testing devices include portable and benchtop types.

[0003] When using a desktop infrared thermal non-destructive testing (NDT) device to inspect aerospace carbon fiber sheet components, the testing process involves manually placing the carbon fiber sheet onto the testing platform. A lifting module then moves the testing probe up and down to adjust the distance between the probe and the component. High-intensity pulsed heat is released onto the surface of the carbon fiber sheet, causing it to heat up rapidly. The heat is then conducted into the material in the form of thermal waves. Defects in aerospace carbon fiber sheets, such as delamination, debonding, and voids, can hinder normal heat wave conduction. During heat wave propagation, the heat conduction rate differs between defective and normal areas, creating a temperature difference on the material surface. This difference allows for the identification of defects.

[0004] However, during manual placement and pre-processing, the surface of carbon fiber sheets is easily contaminated with dust, oil, release agent residue, fingerprints, and other pollutants. This affects the surface thermophysical properties of the carbon fiber sheets, such as thermal emissivity and thermal conductivity. Under pulsed heating excitation, the contaminants and the carbon fiber sheet itself exhibit different absorption, reflection, and conduction behaviors of heat waves, causing deviations in the detected heat wave signals and interfering with the judgment of internal defects in the carbon fiber sheets. Furthermore, pulsed heating needs to be applied uniformly to the surface of the carbon fiber sheets to ensure uniform propagation of heat waves into the material. Surface contaminants may form localized areas of abnormal thermal conductivity, disrupting the uniformity of heat wave propagation. Therefore, the surface of the carbon fiber sheets needs to be treated before inspection. Thus, a thermal imaging inspection device for aero-engine blades needs to be designed.

[0005] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Utility Model Content

[0006] This utility model provides a thermal imaging detection device for aero-engine blades to solve the problem that manual placement and pre-processing can easily cause contaminants to adhere to carbon fiber plates, affecting their thermophysical properties and causing deviations in thermal wave signals and uneven heat conduction. Therefore, surface treatment is required before detection.

[0007] This utility model embodiment adopts the following technical solution: a thermal imaging detection device for aero-engine blades. It mainly includes a support frame, on which a detection platform is fixed, and the detection platform has a raised placement platform; a detection component, which is disposed on the support frame, the moving part including a first moving module fixed on the support frame and capable of horizontal movement, a first lifting module for lifting movement, a second lifting module for adjusting the vertical position relative to the object being detected to meet different detection requirements, and a detection probe on the second lifting module; and a cleaning component, disposed on the first moving module, the cleaning component including a first cleaning part for initial brushing and cleaning of impurities on the surface of the carbon fiber plate, and a second cleaning part for removing fine impurities not completely removed from the surface of the carbon fiber plate.

[0008] Furthermore, the cleaning component includes a cleaning section 1 disposed on the first moving module. The cleaning section 1 includes two sets of brackets fixed on the first moving module. Angle plates are fixed to one end of the two sets of brackets. A connecting rod is fixed between the two sets of angle plates by fasteners. A cleaning brush is fixed on the connecting rod. The cleaning brush is in contact with the surface of the carbon fiber plate.

[0009] Furthermore, the second cleaning unit includes corner pieces fixedly sleeved on the connecting rod near both ends. The side of each corner piece has a concave part. Two sets of the concave parts are arranged opposite each other. A concave frame is slidably arranged between the two sets of the concave parts. Bolts are connected to the concave parts and are fixedly connected to the concave frames through the concave parts.

[0010] Furthermore, two sets of sliding blocks are slidably arranged on the horizontal end of the concave frame. The sliding blocks can slide on the horizontal end of the concave frame. The sliding blocks are fixed on the horizontal end of the concave frame by fasteners. The fasteners ensure that the position of the sliding blocks is fixed. A cylindrical body is fixed between the two sets of sliding blocks. The cylindrical body contains a roll and a lint-free cloth. The cylindrical body is composed of a hollow cylindrical body and a cover threadedly connected to both ends of the cylindrical body.

[0011] Furthermore, the cylinder has a movable roller, with both ends of the roller being movably connected to end caps. The roller rotates to release the cleanroom cloth, and a cleanroom cloth is wound on the roller. The side of the cylinder has an opening, and one end of the cleanroom cloth is adapted to pass through the opening.

[0012] Furthermore, a second cylinder is connected to the lower end of the first cylinder. The second cylinder has a similar structure to the first cylinder. A protruding rod is fixed to the bottom of the second cylinder, and one end of the cleanroom cloth is adapted to pass through the opening and attach to the surface of the protruding rod.

[0013] Furthermore, the roller inside the cylinder is defined as roller two. One end of the lint-free cloth is adapted to pass through the opening, attach to the surface of the protruding rod, and then adhere to roller two. A motor three is fixed on the cover at one end of the cylinder two. One end of the motor three is connected to roller two. A timer switch is provided on the support frame. The timer switch is electrically connected to motor three.

[0014] Furthermore, the first mobile module includes a hollow base mounted on the support frame. A motor is fixed to one end of the hollow base, and a lead screw is fixed to one end of the hollow base via a coupling. The lead screw is located inside the hollow base, and one end of the lead screw is connected to a bearing on one end of the inner wall of the hollow base. A sliding seat is threaded onto the lead screw, and the sliding seat is mounted on the hollow base in a sliding sleeve manner. A guide rail is fixed on the support frame near the other side, and a guide slider is slidably mounted on the guide rail. A support frame is connected to the sliding seat and the guide slider.

[0015] The above-mentioned technical solutions adopted in the embodiments of this utility model can achieve the following beneficial effects:

[0016] The thermal imaging inspection device for aero-engine blades, with a cleaning assembly consisting of a first cleaning section and a second cleaning section mounted on a support frame, effectively addresses the problem of dust, oil, and other contaminants easily adhering to the surface of carbon fiber plates during benchtop infrared thermal non-destructive testing. The first cleaning section performs preliminary brushing of impurities on the carbon fiber plate surface, while the second cleaning section further removes residual fine impurities, effectively preventing contaminants from altering the thermophysical properties of the carbon fiber plate surface and interfering with the absorption, reflection, and conduction of heat waves. Simultaneously, the cleaning assembly, in conjunction with the first moving module, the first lifting module, and the second lifting module of the inspection assembly, allows the inspection probe to move flexibly in three-dimensional space, adjusting its position relative to the inspection object to adapt to different inspection needs. Furthermore, the cleaning assembly ensures that pulse heating is applied uniformly to the surface of the carbon fiber plate, preventing contaminants from forming localized areas of abnormal thermal conductivity and ensuring that heat waves propagate evenly into the material. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0018] In the attached diagram:

[0019] Figure 1This is an overall schematic diagram of the thermal imaging detection device for aero-engine blades in this application.

[0020] Figure 2 for Figure 1 A partial structural diagram;

[0021] Figure 3 for Figure 2 A partial structural diagram;

[0022] Figure 4 for Figure 3 Enlarged view of point A;

[0023] Figure 5 for Figure 4 The left view;

[0024] Figure label:

[0025] 1. Support assembly; 11. Support frame; 12. Detection platform; 13. Placement platform; 14. Cover plate; 2. Detection assembly; 21. Hollow base one; 22. Motor one; 23. Sliding seat one; 24. Support frame; 25. Cross frame; 26. Lifting module one; 27. Sliding seat two; 28. Hollow base two; 29. ​​Motor two; 210. Lead screw two; 211. Sliding seat three; 212. Detection probe; 3. Cleaning assembly; 31. Bracket; 33. Angle plate; 34. Connecting rod; 35. Cleaning brush; 36. Angle piece; 361. Concave piece; 37. Concave frame; 38. Sliding block; 39. Cylinder one; 310. Cylinder two; 311. Motor three; 312. Protruding rod; 313. Dust-free cloth. Detailed Implementation

[0026] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0027] The technical solutions provided by the various embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1-2As shown, the aero-engine blade thermal imaging detection device provided in this embodiment of the present invention includes a support component 1, which includes a support frame 11 and a detection platform 12 fixed on the support frame 11. The detection platform 12 provides a planar carrier for the detection operation. The detection platform 12 has a raised placement platform 13, which is suitable for placing a carbon fiber plate. The carbon fiber plate can be used to simulate or support the object to be detected, such as an aero-engine blade, and provides a detection carrier for thermal imaging detection. The placement platform 13 is symmetrically arranged on both sides and has a spaced cover plate 14. The cover plate 14 has a concave structure. The concave cover plate 14 can play a certain protective and limiting role for the detection area on the placement platform 13 during detection, preventing external factors from interfering with the accuracy of thermal imaging detection.

[0029] Continue to refer to Figure 2 As shown, a detection component 2 is provided on the support frame 11. The detection component 2 is used to perform detection operations on objects such as carbon fiber plates placed on the placement platform 13. The detection component 2 includes a movable part provided on the support frame 11, which can drive the detection component to move in different directions to achieve comprehensive detection. The movable part includes a first movable module fixed on the support frame 11, which provides horizontal movement power to the detection component 2.

[0030] The first moving module includes a hollow base 21 mounted on a support frame 11 near one side. A motor 22 is fixed to one end of the hollow base 21, and a lead screw is fixed to one end of the hollow base 21 via a coupling. The lead screw is located inside the hollow base 21, and one end of the lead screw is connected to a bearing on the inner wall of the hollow base 21. A sliding seat 23 is threaded onto the lead screw, and the sliding seat 23 is mounted on the hollow base 21 as a sliding sleeve. When the lead screw rotates, the sliding seat 23 can move linearly along the hollow base 21. A guide rail is fixed on the support frame 11 near the other side, and a guide slider is slidably mounted on the guide rail. The guide slider cooperates with the sliding seat 23 to enhance the stability of the movement.

[0031] Meanwhile, a support frame 24 is connected to the sliding seat 23 and the guide slider. A lifting module 26 is fixed to the side of the support frame 24. The lifting module 26 is used to realize the vertical lifting movement of the detection component. The lifting module 26 and the first moving module have similar structures. Here, the sliding seat of the lifting module 26 is defined as the sliding seat 27. A horizontally arranged crossbeam 25 is fixed on the sliding seat 27. The crossbeam 25 is used to install the lifting module 2. A T-shaped block is fixed on the upper side of the crossbeam 25 near the support frame 24. At the same time, a sliding groove (not shown in the figure) is opened on the support frame 24 for the T-shaped block to slide and adapt. The cooperation between the T-shaped block and the sliding groove makes the crossbeam 25 move more smoothly under the action of the lifting module 26.

[0032] Furthermore, a vertically positioned lifting module two is provided on the cross frame 25. The lifting module two is used to further adjust the vertical position of the detection probe 212 to adapt to different detection requirements. The lifting module two has a similar structure to the first moving module. The lifting module two includes a hollow base two 28 fixed on the cross frame 25, and a motor two 29 is fixed to one end of the inner wall of the hollow base two 28. One end of the motor two 29 is fixed to a lead screw two 210 through a coupling. The lead screw two 210 is connected to a bearing at one end of the inner wall of the hollow base two 28, and a sliding seat three 211 is threaded onto the lead screw two 210. The detection probe 212 is fixed to the side of the sliding seat three 211.

[0033] The detection probe 212 is a prior art component that directly performs the detection work. During detection, the probe first releases high-intensity pulse heat to the surface of the carbon fiber plate through the built-in heating module, causing the surface to heat up rapidly. The heat is conducted into the interior in the form of heat waves. When encountering defects such as delamination, debonding, or holes, the heat wave conduction is blocked. Due to the difference in heat conduction rate between the defect and the normal area, a temperature difference is formed. The infrared imaging component on the probe captures this temperature field change in real time and converts it into an electrical signal, which is then transmitted to the system to identify the location and shape of the defect. Under the action of the first moving module (horizontal lateral movement), the lifting module 1 (horizontal longitudinal movement), and the lifting module 2 (vertical lifting), the detection probe 212 can move flexibly in three-dimensional space to perform full-area scanning detection of the object on the placement platform 13.

[0034] like Figures 4-5 As shown, a cleaning component 3 is connected to the side of the support frame 24. The cleaning component 3 is used to clean the surface of the carbon fiber plate on the placement platform 13 to ensure that there are no impurities on the surface that would affect the test results during testing. The cleaning component 3 is located on the side of the test probe 212 near the placement platform 13 by default, which facilitates cleaning operations before, during, or after testing. The cleaning component 3 includes a cleaning section 1 located on the side of the support frame 24. The cleaning section 1 provides a basis for preliminary cleaning. The cleaning section 1 includes two sets of brackets 31 fixed to the side of the support frame 24, and corner plates 33 are fixed to one end of the two sets of brackets 31. A connecting rod 34 is fixed between the two sets of corner plates 33 by fasteners. A cleaning brush 35 is fixed on the connecting rod 34. The cleaning brush 35 is suitable for contacting the surface of the carbon fiber plate and can perform preliminary brushing and cleaning of the dust on the surface of the carbon fiber plate.

[0035] A second cleaning section is provided on the connecting rod 34 near both ends. The second cleaning section includes corner pieces 36 that are fixedly sleeved on the connecting rod 34 near both ends. The side of the corner piece 36 has concave pieces 361. The two sets of concave pieces 361 are arranged opposite to each other, and a concave frame 37 is slidably arranged between the two sets of concave pieces 361. At the same time, a bolt (not shown in the figure) is connected to the concave piece 361. The bolt passes through the concave piece 361 and is fixedly connected to the concave frame 37. The concave frame 37 can be fixed in place by the bolt.

[0036] Meanwhile, two sets of sliding blocks 38 are slidably arranged on the horizontal end of the concave frame 37. The sliding blocks 38 can slide on the horizontal end of the concave frame 37 for further fine-tuning of their position. The sliding blocks 38 are fixed to the horizontal end of the concave frame 37 by fasteners, which ensure that the position of the sliding blocks 38 is fixed. A cylindrical body 39 is fixed between the two sets of sliding blocks 38. The cylindrical body 39 contains a roller and a lint-free cloth 313. The cylindrical body 39 is composed of a hollow cylindrical body and shielding covers threaded to both ends of the cylindrical body 39. This structure facilitates subsequent maintenance of the roller or replacement of the lint-free cloth 313. The cylindrical body 39 has a movable roller. The two ends of the roller are movably connected to the shielding covers at both ends, so that the roller can be rotated to release the lint-free cloth 313. The lint-free cloth 313 is wound on the roller and is used for fine wiping the surface of the carbon fiber plate. Meanwhile, there is an opening on the side of the cylinder 39, and one end of the cleanroom cloth 313 is adapted to pass through the opening;

[0037] A second cylinder 310 is connected to the lower end of the first cylinder 39. The second cylinder 310 is used to wind up the used lint-free cloth 313. The second cylinder 310 has a similar structure to the first cylinder 39, which is also convenient for maintenance and replacement of parts. The second cylinder 310 is suitable for winding the used lint-free cloth 313 to maintain the orderliness of the cleaning process. A protruding rod 312 is fixed at the bottom of the second cylinder 310. The protruding rod 312 is used to help the lint-free cloth 313 better fit with the surface of the carbon fiber plate. One end of the lint-free cloth 313 is adapted to pass through the opening and attach to the surface of the protruding rod 312, so as to wipe the surface of the carbon fiber plate placed on the placement platform 13. The cleaning properties of the lint-free cloth 313 are used to remove the fine impurities that the cleaning brush 35 did not clean.

[0038] Here, the first roller inside the second cylinder 310 is defined as the second roller. One end of the cleanroom cloth 313 is adapted to pass through the opening, attach to the surface of the protrusion 312, and then adhere to the second roller, providing a connection base for the second roller to wind up the cleanroom cloth 313. Furthermore, a third motor 311 is fixed to a cover at one end of the second cylinder 310. One end of the third motor 311 is connected to the second roller, and the third motor 311 provides power for the rotation of the second roller. Meanwhile, a timer switch (not shown in the figure) is provided on the support frame 11. The timer switch is electrically connected to the motor 311. The timer switch can control the start and stop of the motor 311 so that the clean cloth 313 in contact with the carbon fiber plate is gradually rolled up by the roller 2 at certain intervals, avoiding the reuse of a certain piece of clean cloth 313 and ensuring that a clean part of the clean cloth 313 is used for each wiping, thereby improving the cleaning effect. The cleaning component 3, through the cooperation of the cleaning brush 35 and the clean cloth 313, can effectively remove impurities from the surface of the carbon fiber plate, providing a guarantee for subsequent testing.

[0039] Working Principle: The carbon fiber plate to be tested is placed on the placement platform 13, and the cleaning component 3 begins operation. The cleaning brush 35 of the first cleaning section first contacts the surface of the carbon fiber plate to initially brush away larger particles of impurities such as dust. At the same time, the lint-free cloth 313 of the second cleaning section passes through the opening of the cylinder 39 and adheres to the surface of the protrusion 312, contacting the carbon fiber plate and wiping away fine impurities using its cleaning properties. The timer switch on the support frame 11 controls the motor 311 to start at regular intervals. The motor 311 drives the roller 2 to rotate, gradually winding up the used lint-free cloth 313, ensuring that only the clean part is used for each wipe, completing a thorough cleaning of the carbon fiber plate surface and removing impurities that may interfere with subsequent testing.

[0040] Secondly, the inspection process. After cleaning, motor 22 of the first moving module starts, driving screw 1 to rotate via coupling, causing sliding seat 23 to move linearly along hollow base 21. Simultaneously, the guide slider slides on the guide rail, enhancing movement stability. Sliding seat 23 drives support frame 24 to move, and lifting module 26 on the side of support frame 24 operates, driving sliding seat 27 and crossbeam 25 to move. Lifting module 2 on crossbeam 25 also starts, and motor 29 drives screw 210 to rotate, causing sliding seat 211 and inspection probe 212 to rise and fall vertically. Under the action of the first moving module (horizontal) and the lifting module, inspection probe 212 moves flexibly in three-dimensional space, reaching the inspection area of ​​the carbon fiber plate. The built-in heating module of the detection probe 212 releases high-intensity pulsed heat, which rapidly heats the surface of the carbon fiber plate. The heat is conducted into the interior in the form of heat waves. If there are defects such as delamination, debonding, or holes, the heat wave conduction is blocked, and a temperature difference is formed between the defective area and the normal area. The infrared imaging component of the probe captures the temperature field changes and converts them into electrical signals that are transmitted to the system to achieve defect identification and location.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An apparatus for thermographic inspection of an aeroengine blade, characterized in that: include A support frame (11) on which a testing platform (12) is fixed, and a protruding placement platform (13) is provided on the testing platform (12); The detection component (2) is mounted on the support frame (11). The moving part includes a first moving module fixed on the support frame (11) and capable of horizontal movement. The first moving module is provided with a lifting module one (26) for lifting movement. The lifting module one (26) is provided with a lifting module two for adjusting the vertical position with the object to be detected to meet different detection requirements. The lifting module two has a detection probe (212). A cleaning component (3) is disposed on the first moving module. The cleaning component (3) includes a first cleaning part disposed on the first moving module for initial brushing and cleaning of impurities on the surface of the carbon fiber plate, and a second cleaning part disposed on the first cleaning part for removing fine impurities that have not been cleaned from the surface of the carbon fiber plate.

2. The aeroengine blade thermographic inspection apparatus of claim 1, wherein: The cleaning component (3) includes a cleaning section 1 disposed on the first moving module. The cleaning section 1 includes two sets of brackets (31) fixed on the first moving module. Angle plates (33) are fixed at one end of the two sets of brackets (31). A connecting rod (34) is fixed between the two sets of angle plates (33) by fasteners. A cleaning brush (35) is fixed on the connecting rod (34). The cleaning brush (35) is in contact with the surface of the carbon fiber plate.

3. The aero-engine blade thermal imaging detection device according to claim 2, characterized in that: The second cleaning unit includes corner pieces (36) fixedly sleeved on the connecting rod (34) near both ends. The corner pieces (36) have concave parts (361) on their sides. Two sets of concave parts (361) are arranged opposite to each other. A concave frame (37) is slidably arranged between the two sets of concave parts (361). Bolts are connected to the concave parts (361), and the bolts pass through the concave parts (361) and are fixedly connected to the concave frame (37).

4. The aero-engine blade thermal imaging detection device according to claim 3, characterized in that: Two sets of sliding blocks (38) are slidably arranged on the horizontal end of the concave frame (37). The sliding blocks (38) can slide on the horizontal end of the concave frame (37). The sliding blocks (38) are fixed on the horizontal end of the concave frame (37) by fasteners. The fasteners ensure that the position of the sliding blocks (38) is fixed. A cylindrical body (39) is fixed between the two sets of sliding blocks (38). The cylindrical body (39) contains a roll and a dust-free cloth (313). The cylindrical body (39) is composed of a hollow cylindrical body and a cover threadedly connected to both ends of the cylindrical body (39).

5. The aero-engine blade thermal imaging detection device according to claim 4, characterized in that: The cylinder (39) has a movable roller, and the two ends of the roller are movably connected to the end covers. The roller rotates to release the clean cloth (313). The clean cloth (313) is wound on the roller. The side of the cylinder (39) has an opening, and one end of the clean cloth (313) is adapted to pass through the opening.

6. The aero-engine blade thermal imaging detection device according to claim 5, characterized in that: The lower end of the first cylinder (39) is connected to the second cylinder (310), which has a similar structure to the first cylinder (39). The bottom of the second cylinder (310) is fixed with a protruding rod (312), and one end of the dust-free cloth (313) is adapted to pass through the opening and attach to the surface of the protruding rod (312).

7. The aero-engine blade thermal imaging detection device according to claim 6, characterized in that: The first roller inside the second cylinder (310) is defined as the second roller. One end of the clean cloth (313) is adapted to pass through the opening and attach to the surface of the protruding rod (312) and then be bonded to the second roller. A motor (311) is fixed on a cover at one end of the second cylinder (310). One end of the motor (311) is connected to the second roller. A timer switch is provided on the support frame (11). The timer switch is electrically connected to the motor (311).

8. The aero-engine blade thermal imaging detection device according to claim 1, characterized in that: The first moving module includes a hollow base (21) mounted on the support frame (11). A motor (22) is fixed to one end of the hollow base (21). A lead screw is fixed to one end of the hollow base (21) via a coupling. The lead screw is located inside the hollow base (21). One end of the lead screw is connected to a bearing on one end of the inner wall of the hollow base (21). A sliding seat (23) is threaded onto the lead screw. The sliding seat (23) is mounted on the hollow base (21) in a sliding sleeve manner. A guide rail is fixed on the support frame (11) near the other side. A guide slider is slidably mounted on the guide rail. A support frame (24) is connected to the sliding seat (23) and the guide slider.

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