A current transformer appearance detection device

Abstract

The application relates to the technical field of detection devices, and discloses a current transformer appearance detection device which comprises a detection table; a visual detection unit which is used for visually detecting the appearance of the current transformer; and a grabbing unit which is used for grabbing and detecting the current transformer to be detected; the grabbing unit comprises a movable frame, a second air cylinder is installed on the movable frame, a fixing frame is installed at the telescopic end of the second air cylinder, a rotating table is arranged on the side, away from the second air cylinder, of the fixing frame, and a grabbing assembly is arranged on the rotating table. The working mode of the two groups of opposite clamping plates and clamping blocks is alternately folded and unfolded; when the initial clamping surface needs to be detected, the two groups of clamping plates in the unfolded state are driven by the third air cylinder, are folded upwards around the first connecting shaft through the swing arm, and the originally clamped surface is completely exposed, so that the detection blind area caused by the fixed clamping surface is avoided, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection devices, more particularly, it relates to a current transformer appearance detection device. BACKGROUND

[0002] As the core element of power system current measurement and protection, the appearance quality of the current transformer is closely related to the safety of equipment operation. If there are scratches, depressions, cracks and other defects on the surface of the transformer shell, it may lead to a decrease in insulation performance, such as local electric field distortion causing corona discharge, and even insulation breakdown after long-term operation. Size deviation will affect the sealing performance of assembly, causing moisture to enter the interior and shortening the service life of the equipment. Therefore, appearance detection needs to achieve full-surface no-dead-angle coverage of the transformer, especially for the key areas of complex structures such as tetrahedrons.

[0003] The clamping surface in contact with the workpiece is completely covered by the clamping jaw body of the traditional detection device when clamping the transformer, and the visual detection unit cannot image this area. For example, taking a tetrahedral transformer as an example, when the clamping jaw clamps the A and C surfaces, the area in contact with the clamping jaw accounts for about 20%-30% of the total area of the surface, which becomes a detection blind area. If there are cracks, pits and other defects in this area, it will cause missed detection,

[0004] Among them, the clamping jaw structure of the existing device is fixed, and once the clamping surface is determined, it cannot be changed. The clamped surface of the same workpiece is always in a shielded state. For transformers that need to detect all surfaces, if a surface is selected as the clamping surface, the appearance quality of the surface cannot be determined through detection, resulting in quality problems in the product. When the clamping surface needs to be re-detected, the transformer needs to be loosened by the clamping jaw to re-determine the position and clamp, thereby reducing the work efficiency. SUMMARY

[0005] The present application provides a current transformer appearance detection device, which solves the technical problem that the clamping jaw of the traditional detection device completely covers the clamping surface in contact with the workpiece when clamping the transformer, and the visual detection unit cannot image this area.

[0006] The application provides a current transformer appearance detection device, which comprises a detection table, a visual detection unit located on the detection table, the visual detection unit being used for visually detecting the appearance of a current transformer, and a grabbing unit located on the detection table and used for grabbing and detecting the current transformer to be detected. The grabbing unit comprises a movable frame, a second air cylinder is installed on the movable frame, a fixed frame is installed at the telescopic end of the second air cylinder, a rotating table is arranged on the side of the fixed frame away from the second air cylinder, a grabbing assembly is arranged on the rotating table, and a rotating assembly is arranged between the fixed frame and the rotating table. The grabbing assembly comprises a control bin installed on the rotating table, four groups of moving blocks are arranged on the side of the control bin away from the rotating table, a support is installed on the moving blocks, a clamping plate is arranged on the support, clamping blocks are arranged on the clamping plate, and the support and the clamping plate are connected through an unfolding part.

[0007] As a further optimization scheme of the application, the four groups of moving blocks are symmetrically distributed in pairs and form a cross-shaped structure.

[0008] As a further optimization scheme of the application, the unfolding part comprises a first connecting shaft connected to the support through a bearing, the first connecting shaft is fixedly connected with the clamping plate, an oscillating arm is installed on the first connecting shaft, a third air cylinder is installed on the support, and the third air cylinder is used for controlling the oscillating arm to oscillate.

[0009] As a further optimization scheme of the application, a sliding groove is formed in the oscillating arm, a sliding rod is slidably connected to the sliding groove, and the telescopic end of the third air cylinder is fixedly connected with the sliding rod.

[0010] As a further optimization scheme of the application, the two groups of clamping plates and the clamping blocks that are symmetrically arranged are connected through a turnover part, and the other two groups of clamping plates and the clamping blocks are fixedly connected.

[0011] As a further optimization scheme of the application, the turnover part comprises a second connecting shaft connected to the two groups of clamping plates through a bearing, the second connecting shaft is fixedly connected with the clamping blocks, a fourth air cylinder is installed on the two groups of clamping plates, a first rack plate is installed at the telescopic end of the fourth air cylinder, a first gear is meshingly connected to the first rack plate, and the first gear is fixedly connected with the second connecting shaft.

[0012] As a further optimization scheme of the application, the control bin and the moving blocks are connected through a clamping part, the clamping part comprises a third connecting shaft connected to the control bin through a bearing, a second gear is installed on the third connecting shaft, a second rack plate is meshingly connected around the second gear, the support is controlled to move synchronously through the second rack plate, a first motor is installed on the rotating table, and the output shaft of the first motor is fixedly connected with the third connecting shaft.

[0013] As a further optimization of the present invention, each of the second rack plates is equipped with a connecting frame, and the connecting frame passes through the control compartment and is fixedly connected to the corresponding moving block. The control compartment is provided with a slot adapted to the connecting frame.

[0014] As a further optimization of the present invention, the actuating assembly includes a second motor mounted on a fixed frame, and an incomplete gear is mounted on the output shaft of the second motor. A third gear is meshed with the incomplete gear, and a worm is mounted on the third gear. A worm wheel is meshed with the worm, and a rotating shaft is mounted on the worm wheel. The rotating shaft is fixedly connected to the rotary table.

[0015] As a further optimization of the present invention, the arc range of the incomplete gear tooth block region is 90°, accounting for one-quarter of the total circumference of the incomplete gear.

[0016] The beneficial effects of this invention are as follows: By adopting a working mode of alternating folding and unfolding of two sets of opposing clamping plates and clamping blocks, when it is necessary to detect the initial clamping surface, the two sets of clamping plates that were originally in the unfolded state are folded upward by the swing arm around the first connecting axis under the drive of the third cylinder, completely detaching from the contact with the current transformer, so that the originally clamped surface is fully exposed, avoiding the detection blind zone caused by the fixed clamping surface, so that defects on each surface can be detected in time, and improving the detection efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a partial three-dimensional structural schematic diagram of the present invention;

[0019] Figure 3 This is a three-dimensional structural diagram of the gripping unit of the present invention;

[0020] Figure 4 This is a partial three-dimensional structural diagram of the gripping unit of the present invention;

[0021] Figure 5 This is a three-dimensional structural diagram of the gripping component of the present invention;

[0022] Figure 6 This is a partial three-dimensional structural diagram of the gripping component, unfolding part, and flipping part of the present invention;

[0023] Figure 7 This is a partial three-dimensional structural diagram of the unfolded part of the present invention;

[0024] Figure 8 This is a partial three-dimensional structural diagram of the gripping component and clamping part of the present invention;

[0025] Figure 9 This is a three-dimensional structural diagram of the toggle component of the present invention.

[0026] In the diagram: 100, Inspection table; 200, Feeding conveyor; 300, Inspection conveyor; 400, Picking unit; 500, Vision inspection unit; 600, Lateral movement control unit; 700, Gripping unit; 710, Fixed base plate; 720, Guide column; 730, Movable frame; 740, First cylinder; 750, Second cylinder; 760, Fixed frame; 770, Rotary table; 780, Gripping assembly; 781, Control compartment; 782, Moving block; 783, Support; 784, Clamping plate; 785, Clamping block; 786, Deployment section; 7861, First connecting shaft; 7862, Swing arm; 78 63. Slide groove; 7864. Slide rod; 7865. Third cylinder; 787. Tilting part; 7871. Second connecting shaft; 7872. Fourth cylinder; 7873. First rack plate; 7874. First gear; 788. Clamping part; 7881. Third connecting shaft; 7882. Second gear; 7883. Second rack plate; 7884. Slide rail; 7885. Connecting frame; 7886. First motor; 790. Actuating assembly; 791. Second motor; 792. Incomplete gear; 793. Third gear; 794. Worm gear; 795. Worm wheel; 796. Rotating shaft; 800. Cross frame. Detailed Implementation

[0027] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0028] According to the appendix Figure 1 As shown, a current transformer appearance inspection device includes an inspection platform 100, on which a feeding conveyor 200, an inspection conveyor 300, and a material handling unit 400 are provided; wherein, the material handling unit 400 includes a material handling gripper and a material handling platform.

[0029] Specifically, the feeding conveyor 200 is used to transport the current transformers to be tested.

[0030] The testing conveyor 300 is equipped with two conveyor belts. One conveyor belt is used to transport qualified products, and the other conveyor belt is used to transport unqualified products. The two conveyor belts are used to divert and transport the tested current transformers.

[0031] The material handling unit 400 is used to transfer and move the current transformer to be tested on the feeding conveyor 200 and transfer the current transformer to be tested to the material handling platform.

[0032] According to the appendix Figure 2 As shown, a vision inspection unit 500 is installed on the inspection conveyor 300. The vision inspection unit 500 is used to visually inspect the appearance of the current transformer. A lateral movement control unit 600 is installed on the inspection table 100, and a crossbeam 800 is provided on the lateral movement control unit 600. A gripping unit 700 is provided on the crossbeam 800.

[0033] Furthermore, the lateral movement control unit 600 is used to control the horizontal frame 800 to move laterally. When the horizontal frame 800 moves laterally, it controls the gripping unit 700 to move synchronously, thereby facilitating the gripping and testing of the current transformer to be tested.

[0034] It should be understood that the current transformer to be tested is transported to the picking station by the feeding conveyor 200 according to the preset path to ensure continuous and orderly supply of materials.

[0035] During operation, the material handling unit 400 starts its handling gripper to pick up the current transformer to be tested from the material handling station and place it on the material handling platform; the material handling platform serves as a transition carrier, providing a stable positioning reference for subsequent handling.

[0036] Subsequently, the lateral movement control unit 600 drives the crossbeam 800 to move laterally, causing the gripping unit 700 to move above the material handling platform; after the gripping unit 700 grips the current transformer to be tested, the lateral movement control unit 600 drives the crossbeam 800 to move again, moving the current transformer to the detection start position of the detection conveyor 300, so that the visual inspection unit 500 corresponds one-to-one with the current transformer to be tested.

[0037] It should be noted that the grasping unit 700 drives the current transformer into the detection area of ​​the visual inspection unit 500, and the visual inspection unit 500 completes the determination of appearance defects through image acquisition, feature comparison and other algorithms.

[0038] After the inspection is completed, based on the judgment result of the vision inspection unit 500, the gripping unit 700 moves back and forth to switch the transport path of the current transformer, diverting qualified and unqualified products to different channels, thereby realizing the automated classification of materials after inspection.

[0039] In one embodiment, according to the appendix Figure 3 As shown, the core function of the gripping unit 700 is to realize the precise transfer of the current transformer from the material handling platform to the inspection conveyor 300, and to divert it to the qualified or unqualified product conveyor belt according to the inspection results.

[0040] Specifically, the gripping unit 700 includes two sets of fixed base plates 710 mounted on the crossbeam 800, and two sets of guide posts 720 are symmetrically mounted between the fixed base plates 710. A movable frame 730 is provided between the two sets of fixed base plates 710, and the movable frame 730 and the guide posts 720 are slidably connected.

[0041] Furthermore, according to the appendix Figure 3 and attached Figure 4 As shown, a first cylinder 740 is mounted on a set of fixed base plates 710, and the telescopic end of the first cylinder 740 is fixedly connected to the movable frame 730. A second cylinder 750 is mounted on the movable frame 730, and a fixed frame 760 is mounted on the telescopic end of the second cylinder 750. A rotating table 770 is provided on the side of the fixed frame 760 away from the second cylinder 750, and a gripping component 780 is provided on the rotating table 770.

[0042] During operation, the lateral movement control unit 600 drives the crossbeam 800 to move above the material handling platform, the second cylinder 750 extends, and pushes the fixed frame 760, the rotary table 770 and the gripping assembly 780 downward to the current transformer to be gripped; the rotary table 770 rotates to the appropriate angle according to the placement posture of the current transformer, such as through a visual pre-positioning signal, and the gripping assembly 780 closes to complete the material gripping.

[0043] In this process, the second cylinder 750 retracts, causing the gripping component 780 and the current transformer to lift upwards and detach from the material handling platform; the lateral movement control unit 600 drives the crossbeam 800 to move above the inspection conveyor 300, waiting for the inspection result signal from the vision inspection unit 500 to determine whether it is a qualified or unqualified product.

[0044] Upon receiving the test results, cylinder 740 of the first cylinder is activated.

[0045] If the product is qualified, the first cylinder 740 drives the movable frame 730 to move forward or backward along the guide column 720 to directly above the qualified product conveyor belt;

[0046] If it is a defective product, move it directly above the defective product conveyor belt.

[0047] After the test is completed, the second cylinder 750 extends again to lower the current transformer onto the corresponding conveyor belt; the gripping component 780 releases, completing the material placement; then the second cylinder 750 retracts and resets, and the first cylinder 740 drives the movable frame 730 back to the initial position, waiting for the next gripping command.

[0048] In one embodiment, according to the appendix Figure 4 To be continued Figure 8As shown, the gripping assembly 780 includes a control compartment 781 mounted on a rotary table 770. Four sets of moving blocks 782 are provided on the side of the control compartment 781 away from the rotary table 770. A bracket 783 is mounted on the moving blocks 782. A clamping plate 784 is provided on the bracket 783. A clamping block 785 is provided on the clamping plate 784. The bracket 783 and the clamping plate 784 are connected by an unfolding part 786.

[0049] Furthermore, the four groups of moving blocks 782 are symmetrically distributed in pairs and form a cross-shaped structure.

[0050] It should be noted that when it is necessary to clamp the current transformer, the control chamber 781 drives four sets of moving blocks 782 to move radially along the cross axis and adjust them to a position that matches the size of the current transformer.

[0051] At the same time, the two sets of opposing unfolding parts 786 are in the unfolded state, the clamping block 785 contacts the two sides of the transformer and applies clamping force; the other two sets of opposing unfolding parts 786 are in the folded state.

[0052] At this time, the current transformer is stably clamped by two sets of horizontal clamps 785, and the other two sides are completely exposed, which makes it easy for the visual inspection unit 500 to perform appearance inspection on the exposed surfaces.

[0053] In this embodiment, by alternately folding and unfolding two sets of clamping plates 784 and clamping blocks 785, unobstructed detection of the four surfaces of the tetrahedral current transformer is achieved, avoiding missed detections caused by clamping obstruction, such as surface scratches, dents and other defects.

[0054] Specifically, the unfolding part 786 includes a first connecting shaft 7861 that is connected to the bracket 783 by a bearing. The first connecting shaft 7861 is fixedly connected to the clamping plate 784. A swing arm 7862 is mounted on the first connecting shaft 7861. A sliding groove 7863 is provided on the swing arm 7862. A sliding rod 7864 is slidably connected to the sliding groove 7863. The telescopic end of the third cylinder 7865 is fixedly connected to the sliding rod 7864. The third cylinder 7865 is mounted on the bracket 783 and is used to control the swing arm 7862 to swing.

[0055] It should be noted that when it is necessary to detect the other two sides that are blocked by the initial clamping group, firstly, the third cylinder 7865 that drives the two sets of unfolded parts 786 in the original folded state retracts, the swing arm 7862 drives the clamping plate 784 to swing upward, and the clamping block 785 contacts and clamps the other two sides of the current transformer. At this time, the current transformer is stably clamped by the new two sets of grippers.

[0056] Subsequently, the third cylinder 7865 of the two sets of unfolding parts 786 that were originally in the unfolded state is extended, the slide rod 7864 slides in the slide groove 7863, driving the swing arm 7862 to swing downward around the first connecting shaft 7861, and the clamping plate 784 folds upward simultaneously, disengaging from the contact with the current transformer, thereby making the two originally blocked sides completely exposed, and the visual inspection unit 500 can inspect them.

[0057] In yet another embodiment, according to the appendix Figure 6 As shown, the two sets of symmetrical clamping plates 784 and clamping blocks 785 are connected by a flipping part 787, and the two sets of symmetrical clamping plates 784 and clamping blocks 785 are fixedly connected.

[0058] Specifically, the flipping part 787 includes a second connecting shaft 7871 that is connected to two sets of clamping plates 784 by bearings, and the second connecting shaft 7871 is fixedly connected to the clamping block 785. A fourth cylinder 7872 is installed on the corresponding two sets of clamping plates 784, and a first rack plate 7873 is installed on the telescopic end of the fourth cylinder 7872. A first gear 7874 is meshed on the first rack plate 7873, and the first gear 7874 is fixedly connected to the second connecting shaft 7871.

[0059] It is important to understand that when the gripping component 780 holds the current transformer, the two sets of clamping blocks 785 with the flipping part 787 drive the current transformer to flip. The first rack plate 7873 meshes with the first gear 7874, driving the second connecting shaft 7871 to rotate. According to the testing requirements, the rotation angle of the first gear 7874 can be precisely controlled, such as 90° or 180°, and transmitted to the clamping blocks 785 through the second connecting shaft 7871, thereby driving the current transformer to flip synchronously.

[0060] When rotated 90°, the front and rear faces of the current transformer change from a vertical state to a horizontal state, exposing them to the vertical field of view of the vision detection unit 500; when rotated 180°, alternating detection of the front and rear faces can be achieved, ensuring that neither face is obstructed.

[0061] After the current transformer's first and last faces are inspected, the fourth cylinder 7872 reverses its action, driving the second connecting shaft 7871 to reset via the first rack plate 7873 and the first gear 7874. The current transformer returns to its initial position, and the clamp 785 releases.

[0062] In yet another embodiment, according to the appendix Figure 5 Appendix Figure 6 and attached Figure 8As shown, the control chamber 781 and the moving block 782 are connected by a clamping part 788. The clamping part 788 includes a bearing connected to a third connecting shaft 7881 on the control chamber 781. A second gear 7882 is mounted on the third connecting shaft 7881. A second rack plate 7883 is meshed around the second gear 7882. The bracket 783 is controlled to move synchronously through the second rack plate 7883. A first motor 7886 is mounted on the rotary table 770, and the output shaft of the first motor 7886 is fixedly connected to the third connecting shaft 7881.

[0063] Furthermore, according to the appendix Figure 8 As shown, the interior of the second rack plate 7883 is slidably connected with a slide rail 7884, the slide rail 7884 is fixedly connected to the rotary table 770, and a connecting frame 7885 is installed on the second rack plate 7883. The connecting frame 7885 passes through the control compartment 781 and is fixedly connected to the corresponding moving block 782. The control compartment 781 has a slot adapted to the connecting frame 7885.

[0064] It should be noted that when the current transformer to be tested needs to be clamped and fixed, the first motor 7886 drives the output shaft to rotate the third connecting shaft 7881, which in turn drives the second gear 7882 fixed on the shaft to rotate synchronously. Since the second gear 7882 meshes with four sets of second rack plates 7883, the rotational motion of the gear is converted into the linear motion of the rack plates along the slide rail 7884. If the gear rotates clockwise, the two opposite sets of rack plates extend outward synchronously, and the other two sets also extend outward synchronously, with the four sets in a symmetrical open state; if the gear rotates counterclockwise, the four sets of rack plates retract inward synchronously.

[0065] The linear motion of the second rack plate 7883 is transmitted to the moving block 782 through the connecting frame 7885, causing the four sets of moving blocks 782 to move closer or further away synchronously along the cross axis, ultimately achieving precise adjustment of the spacing between the clamping blocks 785. During the adjustment process, the slide rail 7884 and the slot of the control compartment 781 jointly constrain the motion trajectory, ensuring that the center of the four sets of clamping blocks 785 is always aligned with the center of the current transformer, avoiding unstable clamping due to eccentricity.

[0066] When the spacing between the clamping blocks 785 reaches the preset value, that is, when it matches the size of the current transformer, the first motor 7886 confirms that it is in place through the servo feedback system, and the output shaft self-locks. The clamping blocks 785, in cooperation with the subsequent unfolding part 786 and the flipping part 787, complete the stable clamping of the current transformer.

[0067] In one embodiment, according to the appendix Figure 9As shown, an actuating assembly 790 is provided between the fixed frame 760 and the rotary table 770. The actuating assembly 790 includes a second motor 791 mounted on the fixed frame 760, and an incomplete gear 792 is mounted on the output shaft of the second motor 791. A third gear 793 is meshed on the incomplete gear 792, and a worm 794 is mounted on the third gear 793. Both ends of the worm 794 are rotatably connected to the fixed frame 760 through bearings. A worm wheel 795 is meshed on the worm 794, and a rotating shaft 796 is mounted on the worm wheel 795. One end of the rotating shaft 796 is rotatably connected to the fixed frame 760 through a bearing, and the other end of the rotating shaft 796 is fixedly connected to the rotary table 770.

[0068] The arc range of the tooth block region of the incomplete gear 792 is 90°, accounting for one-quarter of the total circumference of the incomplete gear 792.

[0069] When the toothless region of the incomplete gear 792 is opposite to the third gear 793, the meshing is interrupted, and the third gear 793, worm 794, worm wheel 795 and rotating shaft 796 are all stationary, and the rotating table 770 remains stationary.

[0070] When the angle of the rotary table 770 needs to be adjusted, the second motor 791 starts, driving the incomplete gear 792 to rotate. As the 90° tooth block area of ​​the incomplete gear 792 gradually meshes with the third gear 793, the third gear 793 is driven to rotate, causing the worm 794 to rotate synchronously. The worm 794 meshes with the worm wheel 795 for transmission, and the rotation of the worm wheel 795 is transmitted to the rotary table 770 through the rotating shaft 796, driving it to rotate synchronously.

[0071] When the incomplete gear 792 rotates 90°, its tooth block area completely disengages from the third gear 793, while the toothless area faces the third gear 793, thus interrupting meshing and stopping the transmission chain. At this time, the worm gear 795 remains stationary under the self-locking action of the worm 794, and the rotary table 770 is precisely stopped at the 90° position.

[0072] If further rotation is required, such as 180°, the second motor 791 continues to drive the incomplete gear 792 to rotate, and each step enables the rotary table 770 to rotate precisely by 90° until the target angle is reached.

[0073] The worm gear 794 and worm wheel 795 transmission have a reliable reverse self-locking function. Even if a load is applied to the rotary table 770, the worm wheel 795 cannot drive the worm gear 794 to reverse, ensuring that the rotary table 770 has no angular drift during the stopping phase.

[0074] The embodiments of this specific implementation have been described above, but this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A device for inspecting the appearance of a current transformer, characterized in that, include: Testing station; The system includes a visual inspection unit and a gripping unit, both located on the inspection platform. The visual inspection unit is used to visually inspect the appearance of the current transformer, and the gripping unit is used to grip and inspect the current transformer to be inspected. The gripping unit includes a movable frame, on which a second cylinder is mounted, and a fixed frame is mounted on the telescopic end of the second cylinder. A rotating platform is provided on the side of the fixed frame away from the second cylinder, and a gripping component is provided on the rotating platform. A toggle component is provided between the fixed frame and the rotating platform. The gripping assembly includes a control compartment mounted on a rotating platform. Four sets of moving blocks are arranged on the side of the control compartment away from the rotating platform, and a bracket is mounted on the moving blocks. A clamping plate is arranged on the bracket, and a clamping block is arranged on the clamping plate. The bracket and the clamping plate are connected by an unfolding part. Two sets of symmetrical clamping plates are connected to the clamping blocks via a flipping part, and two other sets of symmetrical clamping plates are fixedly connected to the clamping blocks. The flipping part includes a second connecting shaft that is connected to two sets of clamping plates by bearings, and the second connecting shaft is fixedly connected to the clamping block. A fourth cylinder is installed on the corresponding two sets of clamping plates, and the clamping block is controlled to flip by the fourth cylinder. The unfolding part includes a first connecting shaft connected to the bracket by a bearing. The first connecting shaft is fixedly connected to the clamping plate. A swing arm is installed on the first connecting shaft. A third cylinder is installed on the bracket, and the third cylinder is used to control the swing arm to swing. The swing arm is provided with a sliding groove, and a sliding rod is slidably connected to the sliding groove. The telescopic end of the third cylinder is fixedly connected to the sliding rod. When it is necessary to clamp the current transformer, the control chamber drives four sets of moving blocks to move radially along the cross axis and adjust them to a position that matches the size of the current transformer. At the same time, the two sets of opposing unfolding parts are in the unfolded state, the clamping blocks contact the two sides of the transformer and apply clamping force; the other two sets of opposing unfolding parts are in the folded state. At this time, the current transformer is stably clamped by two sets of horizontal clamps, and the other two sides are completely exposed, which makes it easy for the visual inspection unit to perform appearance inspection on the exposed surfaces.

2. The current transformer appearance inspection device according to claim 1, characterized in that, The four groups of moving blocks are symmetrically distributed in pairs and form a cross-shaped structure.

3. The current transformer appearance inspection device according to claim 1, characterized in that, The control compartment and the moving block are connected by a clamping part. The clamping part includes a bearing connected to a third connecting shaft on the control compartment, and a second gear is installed on the third connecting shaft. The second gear is meshed with a second rack plate on all four sides, and the bracket is controlled to move synchronously through the second rack plate.

4. The current transformer appearance inspection device according to claim 3, characterized in that, Each of the second rack plates is equipped with a connecting frame, and the connecting frame passes through the control compartment and is fixedly connected to the corresponding moving block. The control compartment is provided with a slot that is compatible with the connecting frame.

5. The current transformer appearance inspection device according to claim 1, characterized in that, The actuating assembly includes a second motor mounted on a fixed frame, and an incomplete gear is mounted on the output shaft of the second motor. A third gear is meshed with the incomplete gear, and a worm is mounted on the third gear. A worm wheel is meshed with the worm, and a rotating shaft is mounted on the worm wheel. The rotating shaft is fixedly connected to the rotary table.

6. The current transformer appearance inspection device according to claim 5, characterized in that, The arc range of the incomplete gear tooth block region is 90°, accounting for one-quarter of the total circumference of the incomplete gear.

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