Current transformer appearance detection device

Abstract

The invention relates to the technical field of detection devices, and discloses a current transformer appearance detection device which comprises a detection table. The visual detection unit is used for performing visual detection on the appearance of the current transformer; the grabbing unit is used for carrying out grabbing detection on 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, away from the second air cylinder, of the fixed frame, and a grabbing assembly is arranged on the rotating table. By adopting a working mode that two groups of opposite clamping plates and clamping blocks are alternately folded and unfolded, when an initial clamping surface needs to be detected, the two groups of clamping plates which are originally in an unfolded state are upwards folded around a first connecting shaft through a swing arm under the driving of a third cylinder, so that the originally clamped surface is completely exposed; a detection blind area caused by fixation of the clamping surface is avoided, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and more particularly to an appearance detection device for a current transformer. Background Art

[0002] As a core component for current measurement and protection in power systems, the appearance quality of current transformers is closely linked to their operational safety. Defects such as scratches, dents, and cracks on the transformer housing can degrade insulation performance. This can lead to corona discharge caused by localized electric field distortion, and even insulation breakdown after long-term operation. Dimensional deviations can also affect assembly sealing, allowing moisture to enter the interior and shortening equipment life. Therefore, appearance inspection must thoroughly cover the entire transformer surface, especially critical areas within complex structures such as tetrahedrons.

[0003] When the jaws of a traditional inspection device clamp a mutual inductor, the clamping surface in contact with the workpiece is completely covered by the jaw body, and the visual inspection unit cannot image this area. For example, taking a tetrahedral mutual inductor as an example, when the jaws clamp surfaces A and C, the area where surfaces A and C contact the jaws accounts for about 20%-30% of the total area of ​​the surface, becoming a blind spot for inspection. If there are defects such as cracks or pitting in this area, it will result in missed inspections. The existing device's clamping jaws have a fixed structure, and once the clamping surface is determined, it cannot be changed. This means that the clamped surface of the same workpiece remains obscured. For transformers requiring inspection on all surfaces, if a specific surface is selected as the clamping surface, the appearance quality of that surface cannot be determined through inspection, leading to potential product quality risks. When the clamping surface needs to be re-inspected, the clamping jaws must release the transformer to reposition and re-clamp it, reducing work efficiency. Summary of the Invention

[0004] The present invention provides a current transformer appearance inspection device, which solves the technical problem in the related art that when the clamping jaws of the traditional inspection device clamp the transformer, the clamping surface in contact with the workpiece is completely covered by the clamping jaw body, and the visual inspection unit cannot image the area.

[0005] The present invention provides a current transformer appearance inspection device, comprising an inspection platform; a visual inspection unit, located on the inspection platform, and used to perform visual inspection on the appearance of the current transformer; a grabbing unit, located on the inspection platform, and used to grab and inspect the current transformer to be inspected; the grabbing unit comprises a movable frame, on which a second cylinder is mounted, and a fixed frame is mounted at the telescopic end of the second cylinder, a rotating table is provided on the side of the fixed frame away from the second cylinder, and a grabbing assembly is provided on the rotating table, and a toggle assembly is provided between the fixed frame and the rotating table; the grabbing assembly comprises a control compartment mounted on the rotating table, four groups of moving blocks are provided on the side of the control compartment away from the rotating table, and a bracket is mounted on the moving block, a clamping plate is provided on the bracket, and a clamping block is provided on the clamping plate, and the bracket and the clamping plate are connected by an expansion portion.

[0006] As a further optimization solution of the present invention, the four groups of moving blocks are symmetrically distributed in pairs and form a cross-shaped structure.

[0007] As a further optimization scheme of the present invention, the unfolding part includes a first connecting shaft connected to the bracket by a bearing, the first connecting shaft and the splint are fixedly connected, 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.

[0008] As a further optimization solution of the present invention, a sliding groove is provided on the swing arm, a sliding rod is slidably connected to the sliding groove, and the telescopic end of the third cylinder is fixedly connected to the sliding rod.

[0009] As a further optimization solution of the present invention, the two symmetrical groups of the clamping plates and the clamping block are connected via a flip portion, and the two symmetrical groups of the clamping plates and the clamping block are fixedly connected.

[0010] As a further optimization scheme of the present invention, the flipping part includes a second connecting shaft connected to two groups of the clamping plates by a bearing, and the second connecting shaft is fixedly connected to the clamping block, and the corresponding two groups of the clamping plates are installed with a fourth cylinder, and the telescopic end of the fourth cylinder is installed with a first rack plate, and the first rack plate is meshed with a first gear, and the first gear is fixedly connected to the second connecting shaft.

[0011] As a further optimization scheme of the present invention, the control warehouse and the moving block are connected by a clamping part, the clamping part includes a bearing connected to the third connecting shaft on the control warehouse, and a second gear is installed on the third connecting shaft, and the second gear is meshed and connected with a second rack plate on all four sides, and the bracket is controlled to move synchronously by the second rack plate. A first motor is installed on the rotating table, and the output shaft of the first motor is fixedly connected to the third connecting shaft.

[0012] As a further optimization scheme of the present application, the second rack plate is provided with a connecting frame, and the connecting frame is fixedly connected with the corresponding moving block through the control bin.

[0013] As a further optimization scheme of the present application, the dialing assembly comprises a second motor mounted on the fixed frame, an incomplete gear is mounted on the output shaft of the second motor, a third gear is engagedly connected to the incomplete gear, a worm is mounted on the third gear, a worm wheel is engagedly connected to the worm, and a rotating shaft is mounted on the worm wheel and fixedly connected with the rotating table.

[0014] As a further optimization scheme of the present application, the range of the arc of the incomplete gear tooth block region is 90°, accounting for one fourth of the total circumference of the incomplete gear.

[0015] The present application has the beneficial effects that: the present application adopts the working mode of alternating folding and unfolding of the two groups of opposite clamping plates and clamping blocks, when the initial clamping surface needs to be detected, the two groups of clamping plates in the unfolded state are folded upward around the first connecting shaft by the swing arm under the driving of the third cylinder, completely separating from the contact with the mutual inductor, so that the originally clamped surface is completely exposed, avoiding the detection blind area caused by the fixed clamping surface, so that each surface defect can be found in time, improving the detection efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic diagram of the three-dimensional structure of the present application; Figure 2 is a schematic diagram of the local three-dimensional structure of the present application; Figure 3 is a schematic diagram of the three-dimensional structure of the present application; Figure 4 is a schematic diagram of the local three-dimensional structure of the present application; Figure 5 is a schematic diagram of the three-dimensional structure of the present application; Figure 6 is a schematic diagram of the local three-dimensional structure of the present application; Figure 7 is a schematic diagram of the local three-dimensional structure of the present application; Figure 8 is a schematic diagram of the local three-dimensional structure of the present application; Figure 9 is a schematic diagram of the three-dimensional structure of the present application.

[0017] In the figure: 100, inspection table; 200, feeding conveyor; 300, inspection conveyor; 400, material picking unit; 500, visual 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, rotating table; 780, gripping assembly; 781, control chamber; 782, moving block; 783, bracket; 784, clamping plate; 785, clamping block; 786, unfolding part; 7861, first connecting shaft; 7862, swing arm; 78 63. Slide groove; 7864. Slide rod; 7865. Third cylinder; 787. Flipping 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. Toggle assembly; 791. Second motor; 792. Incomplete gear; 793. Third gear; 794. Worm; 795. Worm wheel; 796. Rotating axis; 800. Horizontal frame. DETAILED DESCRIPTION

[0018] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed solely to enable those skilled in the art to better understand and implement the subject matter described herein, and that the functions and arrangements of the elements discussed may be varied without departing from the scope of this specification. Various examples may omit, substitute, or add various processes or components as needed. In addition, features described with respect to some examples may also be combined in other examples.

[0019] According to the attached Figure 1 As shown, a current transformer appearance inspection device includes a testing platform 100, on which a loading conveyor 200, a testing conveyor 300 and a picking unit 400 are provided; wherein the picking unit 400 includes a picking gripper and a picking platform.

[0020] Specifically, the loading conveyor 200 is used to transport the current transformer to be tested.

[0021] The detection conveyor 300 is provided 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 shunt and transport the current transformers after detection.

[0022] The material taking unit 400 is used to transfer and transport the current transformer to be tested on the loading conveyor 200, and transfer the current transformer to be tested to the material taking platform.

[0023] According to the attached Figure 2 As shown, a visual inspection unit 500 is installed on the inspection conveyor 300, and the visual inspection unit 500 is used to perform visual inspection on the appearance of the current transformer. A lateral movement control unit 600 is installed on the inspection table 100, and a horizontal frame 800 is provided on the lateral movement control unit 600, and a grabbing unit 700 is provided on the horizontal frame 800.

[0024] Furthermore, the lateral movement control unit 600 is used to control the lateral frame 800 to move lateral. When the lateral frame 800 moves lateral, the grabbing unit 700 is controlled to move synchronously, thereby facilitating the grabbing and testing of the current transformer to be tested.

[0025] It should be understood that the current transformer to be tested is transported by the loading conveyor 200 to the material taking station along a preset path to ensure continuous and orderly supply of materials.

[0026] During operation, the picking gripper of the picking unit 400 is activated to pick up the current transformer to be tested from the picking station and place it on the picking platform; wherein the picking platform serves as a transition carrier to provide a stable positioning reference for subsequent picking.

[0027] Subsequently, the lateral movement control unit 600 drives the horizontal frame 800 to move horizontally, driving the grabbing unit 700 to move above the material picking platform; after the grabbing unit 700 grabs the current transformer to be tested, the lateral movement control unit 600 drives the horizontal frame 800 to move again, moving the current transformer to the detection starting position of the detection conveyor 300, so that the visual inspection unit 500 corresponds one-to-one with the current transformer to be tested.

[0028] It should be noted that the grabbing 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 algorithms such as image acquisition and feature comparison.

[0029] After the inspection is completed, according to the judgment result of the visual inspection unit 500, the grasping unit 700 moves back and forth, switches the transportation path of the current transformer, and diverts qualified and unqualified products to different channels, thereby realizing automatic classification of materials after inspection.

[0030] In one embodiment, according to the attached Figure 3 As shown, the core function of the grabbing unit 700 is to realize the accurate transfer of the current transformer from the material taking platform to the detection conveyor 300, and to divert it to the qualified product or unqualified product conveyor belt according to the detection results.

[0031] Specifically, the grabbing unit 700 includes two sets of fixed base plates 710 mounted on the horizontal frame 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.

[0032] Furthermore, according to the attached Figure 3 and attached Figure 4 As shown, a first cylinder 740 is installed on one group 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 installed on the movable frame 730, and a fixed frame 760 is installed on the telescopic end of the second cylinder 750, a rotating platform 770 is provided on the side of the fixed frame 760 away from the second cylinder 750, and a grabbing assembly 780 is provided on the rotating platform 770.

[0033] During operation, the lateral movement control unit 600 drives the horizontal frame 800 to move above the material picking platform, and the second cylinder 750 extends, pushing the fixed frame 760, the rotating table 770 and the grabbing assembly 780 to move downward to the transformer to be grabbed; the rotating table 770 rotates to an adaptive angle according to the placement posture of the transformer, such as through visual pre-positioning signals, and the grabbing assembly 780 closes to complete the material grabbing.

[0034] Among them, the second cylinder 750 contracts, driving the grabbing assembly 780 and the mutual inductor to lift upward and separate from the material picking platform; the horizontal movement control unit 600 drives the horizontal frame 800 to move above the inspection conveyor 300, waiting for the inspection result signal of the visual inspection unit 500 to determine whether it is a qualified product or a failed product.

[0035] After receiving the detection result, the first cylinder 740 is started.

[0036] 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 the top of the qualified product conveyor belt; If it is a defective product, it will be moved to the top of the defective product conveyor belt.

[0037] After the detection is completed, the second cylinder 750 extends again to lower the mutual inductor to the corresponding conveyor belt; the grabbing assembly 780 is released to complete the material placement; then the second cylinder 750 contracts and resets, and the first cylinder 740 drives the movable frame 730 back to the initial position, waiting for the next grabbing instruction.

[0038] In one embodiment, according to the attached Figure 4 To the attached Figure 8As shown, the grabbing assembly 780 includes a control bin 781 mounted on a rotating table 770, four groups of moving blocks 782 are provided on the side of the control bin 781 away from the rotating table 770, and a bracket 783 is installed on the moving block 782, a splint 784 is provided on the bracket 783, and a clamping block 785 is provided on the splint 784, and the bracket 783 and the splint 784 are connected by an unfolding portion 786.

[0039] Furthermore, the four groups of moving blocks 782 are symmetrically distributed in pairs and form a cross-shaped structure.

[0040] It should be noted that when the transformer needs to be clamped, the control compartment 781 drives the four groups of moving blocks 782 to move radially along the cross axis and adjust to a position that is adapted to the size of the transformer.

[0041] At the same time, the two sets of opposite unfolding parts 786 are driven to be in the unfolded state, and the clamping blocks 785 contact the two side surfaces of the mutual inductor and apply a clamping force; the other two sets of opposite unfolding parts 786 are in the folded state.

[0042] At this time, the mutual inductor is stably clamped by the two sets of horizontal clamping blocks 785, and the other two sides are completely exposed, which facilitates the visual inspection unit 500 to perform appearance inspection on the exposed surfaces.

[0043] In this embodiment, by alternately folding and unfolding two sets of clamps 784 and clamping blocks 785, unobstructed detection of the four surfaces of the tetrahedron mutual inductor is achieved, avoiding missed detection due to clamping obstruction, such as surface scratches, dents and other defects.

[0044] Specifically, the unfolding portion 786 includes a first connecting shaft 7861 connected to the bracket 783 by a bearing, the first connecting shaft 7861 and the splint 784 are fixedly connected, a swing arm 7862 is installed on the first connecting shaft 7861, a slide groove 7863 is provided on the swing arm 7862, a slide rod 7864 is slidably connected to the slide groove 7863, the telescopic end of the third cylinder 7865 is fixedly connected to the slide rod 7864, the third cylinder 7865 is installed on the bracket 783, and the third cylinder 7865 is used to control the swing arm 7862 to swing.

[0045] It's important to note that when testing the other two sides blocked by the initial clamping group, the third cylinder 7865 of the two previously folded expansion sections 786 is first driven to retract. The swing arm 7862 drives the clamping plate 784 upward, and the clamping block 785 contacts and clamps the other two sides of the transformer. At this point, the transformer is stably clamped by the new two sets of clamping jaws.

[0046] Subsequently, the third cylinder 7865 of the two sets of unfolding parts 786 that were originally in the unfolded state is extended, and the slide rod 7864 slides in the slide groove 7863, driving the swing arm 7862 to swing downward around the first connecting axis 7861, and the splint 784 is synchronously folded upward to break away from the contact with the mutual inductor, so that the two sides that were originally blocked are completely exposed, and the visual inspection unit 500 can detect them.

[0047] In yet another embodiment, according to the attached Figure 6 As shown, two symmetrical groups of clamps 784 and clamping blocks 785 are connected via a flip portion 787 , and two symmetrical groups of clamps 784 and clamping blocks 785 are fixedly connected.

[0048] Specifically, the flipping part 787 includes a second connecting shaft 7871 connected to two sets of clamps 784 by a bearing, and the second connecting shaft 7871 is fixedly connected to the clamping block 785. The corresponding two sets of clamps 784 are equipped with a fourth cylinder 7872, and the telescopic end of the fourth cylinder 7872 is equipped with a first rack plate 7873. The first rack plate 7873 is meshed with a first gear 7874, and the first gear 7874 is fixedly connected to the second connecting shaft 7871.

[0049] It should be understood that when the gripping assembly 780 grips the transformer, the two sets of clamping blocks 785 with flipping portions 787 drive the transformer to flip. The first rack plate 7873 engages with the first gear 7874, driving the second connecting shaft 7871 to rotate. Depending on 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 via the second connecting shaft 7871, thereby driving the transformer to flip synchronously.

[0050] When flipped 90°, the front and rear surfaces of the transformer change from a vertical state to a horizontal state, and are exposed to the vertical field of view of the visual detection unit 500; when flipped 180°, alternating detection of the front and rear surfaces can be achieved to ensure that both sides are unobstructed.

[0051] After the front and rear surface inspection of the transformer is completed, the fourth cylinder 7872 moves in the reverse direction, and drives the second connecting shaft 7871 to reset through the first rack plate 7873 and the first gear 7874. The transformer returns to its initial posture, and the clamp 785 is loosened to complete the release.

[0052] In yet another embodiment, according to the attached Figure 5 , Attachment Figure 6 and attached Figure 8As shown, the control chamber 781 and the moving block 782 are connected by a clamping portion 788, and the clamping portion 788 includes a bearing connected to a third connecting shaft 7881 on the control chamber 781, and a second gear 7882 is installed on the third connecting shaft 7881, and the second gear 7882 is meshed and connected with a second rack plate 7883 on all four sides. The bracket 783 is controlled by the second rack plate 7883 to move synchronously, and a first motor 7886 is installed on the rotating table 770, and the output shaft of the first motor 7886 is fixedly connected to the third connecting shaft 7881.

[0053] Furthermore, according to the attached Figure 8 As shown, the interior of the second rack plate 7883 is slidably connected to a slide rail 7884, and the slide rail 7884 is fixedly connected to the rotating table 770. The second rack plate 7883 is installed with a connecting frame 7885, and the connecting frame 7885 passes through the control compartment 781 and is fixedly connected to the corresponding moving block 782 respectively. The control compartment 781 is provided with a slot that is compatible with the connecting frame 7885.

[0054] It should be noted that when the current transformer to be tested needs to be clamped and fixed, the first motor 7886 is driven to operate, so that its output shaft drives the third connecting shaft 7881 to rotate, thereby driving the second gear 7882 fixed to the shaft to rotate synchronously. Because the second gear 7882 is engaged with the four sets of second rack plates 7883, the rotational motion of the gear is converted into linear motion of the rack plates along the slide rail 7884. If the gear rotates clockwise, the two opposing sets of rack plates extend outward synchronously, and the other two sets also extend outward synchronously, with all four sets in a symmetrically open state. If the gear rotates counterclockwise, the four sets of rack plates simultaneously retract inward.

[0055] The linear motion of the second rack plate 7883 is transmitted to the moving blocks 782 via the connecting frame 7885, driving the four sets of moving blocks 782 to move synchronously closer or farther along the cross axis, ultimately achieving precise adjustment of the spacing between the clamping blocks 785. During adjustment, the slide rails 7884 and the notches in the control compartment 781 work together to constrain the motion trajectory, ensuring that the centers of the four sets of clamping blocks 785 are always aligned with the center of the transformer, preventing unstable clamping due to eccentricity.

[0056] When the spacing between the clamps 785 reaches the preset value, that is, matches the size of the transformer, the first motor 7886 is confirmed to be in place through the servo feedback system, the output shaft is self-locked, and the clamps 785 complete the stable clamping of the transformer with the cooperation of the subsequent expansion part 786 and the flipping part 787.

[0057] In one embodiment, according to the attached Figure 9As shown, a toggle assembly 790 is provided between the fixed frame 760 and the rotating table 770. The toggle 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 with 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 with 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 rotating table 770.

[0058] The arc range of the tooth block area of ​​the incomplete gear 792 is 90°, accounting for one quarter of the total circumference of the incomplete gear 792.

[0059] When the toothless area of ​​the incomplete gear 792 faces the third gear 793 , the meshing is interrupted, the third gear 793 , the worm 794 , the worm wheel 795 and the rotating shaft 796 are all in a stationary state, and the rotating platform 770 remains stationary.

[0060] When the angle of the rotating platform 770 needs to be adjusted, the second motor 791 is activated, driving the incomplete gear 792 to rotate. When the 90-degree tooth area of ​​the incomplete gear 792 gradually meshes with the third gear 793, the third gear 793 is driven to rotate, driving the worm 794 to rotate synchronously. The worm 794 meshes with the worm wheel 795, and the rotation of the worm wheel 795 is transmitted to the rotating platform 770 through the rotating shaft 796, driving the rotating platform 770 to rotate synchronously.

[0061] When incomplete gear 792 rotates 90°, its toothed area completely disengages from third gear 793, leaving the toothless area facing third gear 793, interrupting meshing and halting the transmission chain. At this point, worm gear 795 remains stationary due to the self-locking action of worm 794, and rotating platform 770 remains precisely at the 90° position.

[0062] If further rotation, such as 180°, is required, the second motor 791 continues to drive the incomplete gear 792 to rotate, and each step enables the rotary table 770 to rotate precisely 90° until the target angle is reached.

[0063] The worm 794 and worm wheel 795 have a reliable reverse self-locking function. Even if a load acts on the rotating table 770, the worm wheel 795 cannot drive the worm 794 to reverse, ensuring that the rotating table 770 has no angular drift during the stop phase.

[0064] The above describes an embodiment of this specific implementation method, but this embodiment is not limited to the above specific implementation method. The above specific implementation method is merely illustrative and not restrictive. Ordinary technicians in this field can also make many forms based on the inspiration of this embodiment, all of which are protected by this embodiment.

Claims

1. A current transformer appearance detection device, characterized in that: include: Testing bench; A visual inspection unit and a grabbing unit, both of which are located on the inspection platform, the visual inspection unit is used to perform visual inspection on the appearance of the current transformer, and the grabbing unit is used to perform grabbing inspection on the current transformer to be inspected; The grabbing unit includes a movable frame, a second cylinder is mounted on the movable frame, 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 grabbing assembly is provided on the rotating platform, and a toggle assembly is provided between the fixed frame and the rotating platform; The grabbing assembly includes a control chamber mounted on a rotating platform, four sets of moving blocks are provided on a side of the control chamber away from the rotating platform, and brackets are installed on the moving blocks, clamping plates are provided on the brackets, and clamping blocks are provided on the clamping plates, and the brackets and the clamping plates are connected by an expansion portion; Two symmetrical groups of the clamping plates are connected to the clamping block via a flip portion, and two other symmetrical groups of the clamping plates are fixedly connected to the clamping block; The flipping part includes a second connecting shaft connected to two groups of the clamping plates by a bearing, and the second connecting shaft is fixedly connected to the clamping block. The corresponding two groups of the clamping plates are equipped with a fourth cylinder, and the clamping block is controlled by the fourth cylinder to perform flipping movement.

2. A current transformer appearance detection 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 detection device according to claim 1, characterized in that: The unfolding part includes a first connecting shaft connected to the bracket by a bearing, the first connecting shaft and the splint are fixedly connected, 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.

4. A current transformer appearance detection device according to claim 3, characterized in that: A sliding groove is provided on the swing arm, a sliding rod is slidably connected to the sliding groove, and the telescopic end of the third cylinder is fixedly connected to the sliding rod.

5. The current transformer appearance detection device according to claim 1, characterized in that: The control bin and the moving block are connected by a clamping portion, and the clamping portion includes a bearing connected to a third connecting shaft on the control bin, 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 by the second rack plate.

6. The current transformer appearance detection device according to claim 5, characterized in that: The second rack plates are all equipped with connecting frames, and the connecting frames pass through the control compartment and are fixedly connected to the corresponding moving blocks respectively. The control compartment is provided with a notch adapted to the connecting frame.

7. The current transformer appearance detection device according to claim 1, characterized in that: The toggle 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 meshedly connected to the incomplete gear, and a worm is mounted on the third gear, the worm is meshedly connected to a worm wheel, and a rotating shaft is mounted on the worm wheel, and the rotating shaft is fixedly connected to the rotating table.

8. The current transformer appearance detection device according to claim 7, characterized in that: The arc range of the tooth block area of ​​the incomplete gear is 90°, accounting for one quarter of the total circumference of the incomplete gear.

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