Post insulator flaw detection device

Abstract

The invention relates to a post insulator flaw detection device which comprises a base, a lifting seat, a detection assembly and a detection probe, and the lifting seat is installed on the base and can move in the height direction of the base; the detection assembly is installed on the lifting base and comprises a first detection base and a second detection base, the first detection base is located above the second detection base, the first detection base and the second detection base can get close to each other or get away from each other in the preset direction, and when the first detection base and the second detection base move to the up-down coaxial position, the first detection base and the second detection base are separated from each other. The inner wall of the first detection seat is abutted against one side of the upper section of the post insulator to be detected, and the inner wall of the second detection seat is abutted against the other side of the lower section of the surface of the post insulator to be detected; the detection probes are respectively arranged on the first detection seat and the second detection seat, and perform flaw detection on the outer surface of the post insulator to be detected by circumferentially moving around the central axis of the first detection seat or the second detection seat. According to the invention, coverage detection of the whole outer surface of the post insulator can be realized.

Description

Technical Field

[0001] This application relates to the field of power equipment testing technology, and in particular to a flaw detection device for post insulators. Background Technology

[0002] Post insulators are core insulation devices in power systems, primarily used to support and secure conductors and provide insulation between conductors and towers. Their performance stability directly affects the safe operation of the power grid. Due to long-term exposure to harsh natural environments such as wind, rain, snow, and ultraviolet radiation, post insulators are prone to defects such as cracks, breakage, and aging. If these defects are not detected and addressed in a timely manner, they may lead to a decline in insulation performance, causing power accidents such as short circuits and flashovers, resulting in large-scale power outages and causing serious economic losses and social impacts.

[0003] Currently, there are many shortcomings in the flaw detection methods for post insulators. Traditional testing equipment can usually only inspect a single side of the insulator at a time, resulting in low testing efficiency and making it difficult to meet the needs of large-scale, high-frequency testing. At the same time, the test results are easily affected by subjective factors such as the operator's experience level, operational standardization, and fatigue level, leading to poor accuracy and stability, and making it difficult to ensure the consistency and reliability of the test data. Summary of the Invention

[0004] This application provides a flaw detection device for post insulators to solve the problem of low detection efficiency in the prior art, which can only detect one side of the insulator at a time.

[0005] This application provides a flaw detection device for post insulators, comprising: Base; The lifting seat is installed on the base and can move along the height direction of the base; The detection assembly is mounted on the lifting platform and includes a first detection seat and a second detection seat. The first detection seat is located above the second detection seat. The first and second detection seats can move closer to or further away from each other in a preset direction. When the first and second detection seats move to a position where they are coaxial, the inner wall of the first detection seat abuts against one side of the upper section of the post insulator to be tested, and the inner wall of the second detection seat abuts against the other side of the lower section of the surface of the post insulator to be tested. The detection probes are respectively set on the first detection seat and the second detection seat. The detection probes move circumferentially around the central axis of the first detection seat or the second detection seat to perform flaw detection on the outer surface of the post insulator to be tested.

[0006] In one possible design, the first detection seat and the second detection seat have the same structure, each including: The limiting sleeve is semi-circular, and its inner wall can abut against the surface of the post insulator to be tested. A guide sleeve is coaxially arranged with a limiting sleeve and is connected to the limiting sleeve via a vertical plate. The guide sleeve has a notch. A toothed ring with a notch is fitted into a groove on the outer wall of a guide sleeve and can rotate around the central axis of the guide sleeve. A detection probe is mounted on the toothed ring and can rotate around the central axis of the guide sleeve under the drive of the toothed ring.

[0007] In one possible design, the first detection seat and the second detection seat also include a first gear and a second gear, respectively. The first gear and the second gear mesh with the gear ring, the point where the first gear meshes with the gear ring is the first meshing point, and the point where the second gear meshes with the gear ring is the second meshing point. The arc length between the first meshing point and the second meshing point on the gear ring is greater than the arc length of the notch position on the gear ring.

[0008] In one possible design, the first gear and the second gear are connected to the third motor via pulleys and a drive belt.

[0009] In one possible design, a symmetrically distributed transmission mechanism is also included, which is connected to the first and second detection seats. The transmission mechanism includes: The base plate is installed on the lifting seat, and a guide hole is provided on the base plate; The connecting arm passes through the guide hole and is mounted on the base plate via a horizontal plate. It can move along the guide hole and one end is connected to the limiting sleeve. A support frame is mounted on the base plate, and a slider is mounted on the support frame. The slider is connected to the other end of the connecting arm. A spring is mounted on a support frame, with one end abutting against the support frame and the other end connected to one side of the slider. The movable block is located on the other side of the slider. The side of the movable block closest to the slider is curved. When the movable block moves in a direction perpendicular to the spring, the spring pushes the slider to move along the length of the spring, which in turn drives the connecting arm to move along the guide hole.

[0010] In one possible design, a roller is provided on the side of the slider near the moving block.

[0011] In one possible design, the transmission mechanism also includes a lead screw, which is located at the end of the support frame. The lead screw is connected to the second motor via a pulley and a transmission belt. A slide is threaded onto the lead screw, and the slide is slidably engaged with the end of the support frame. The slide is connected to the moving block via a connecting rod.

[0012] In one possible design, the base is provided with a side plate, and the movable block is connected to a vacuum adsorption plate via a push-pull rod. The vacuum adsorption plate can approach the side plate under the action of the movable block and adsorb onto the side plate through negative pressure.

[0013] In one possible design, the base is provided with a transmission screw and a guide rod extending along its height direction. The lifting seat is threadedly connected to the transmission screw, and the lifting seat is slidably engaged with the guide rod. The transmission screw is connected to the first motor via a pulley and a transmission belt.

[0014] In one possible design, the base is equipped with casters.

[0015] The beneficial effects of this application are as follows: The flaw detection device for post insulators disclosed in this application can adapt to post insulators of different heights through the height adjustment of the lifting base. A toothed ring drives the detection probe in a 360° circular motion, combined with the staggered clamping of the upper and lower detection seats, achieving full coverage detection of the entire outer surface of the post insulator. This effectively avoids the missed detection problems caused by traditional single-side detection, significantly improving the comprehensiveness of the detection. The clamping and positioning by the semi-annular limiting sleeve and the adsorption and fixation by the vacuum adsorption plate provide double protection for the relative stability of the device and the insulator during the detection process, avoiding detection errors caused by equipment shaking and improving detection accuracy.

[0016] By cleverly utilizing the gap between adjacent insulating covers of the post insulator, and through the notch in the guide sleeve and the toothed ring, as well as the double meshing of the first and second gears, the toothed ring can be continuously rotated, avoiding interruption of the toothed ring rotation and ensuring the continuity of the testing process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main three-dimensional structure of this application; Figure 2 This is a schematic diagram of the three-dimensional separation structure of the main body of this application; Figure 3 This is a three-dimensional structural diagram of the detection control components and detection mechanism of this application; Figure 4 This is a schematic diagram of the three-dimensional separation structure of the detection control component and the detection mechanism in this application; Figure 5 This is a three-dimensional structural diagram of the lifting control seat of this application; Figure 6 This is a three-dimensional structural diagram of the detection and control component of this application; Figure 7 This is a schematic diagram of the three-dimensional separation structure of the expansion and contraction control component of this application; Figure 8 For the purposes of this application Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a three-dimensional structural diagram of the testing institution in this application; Figure 10 This is a schematic diagram of the three-dimensional separation structure of a single testing unit in this application; Figure 11 This is a schematic diagram of the structure of a post insulator.

[0019] Figure label: 1. Base; 11. Side plate; 12. Transmission screw; 13. Guide rod; 14. First motor; 15. Caster wheel; 2. Lifting seat; 31. First detection seat; 311. Limit sleeve; 312. Guide sleeve; 313. Vertical plate; 314. Gear ring; 315. First gear; 316. Second gear; 317. Third motor; 32. Second detection seat; 4. Detection probe; 51. Base plate; 511. Guide elongated hole; 52. Connecting arm; 53. Horizontal plate; 61. Support frame; 62. Slider; 63. Spring; 64. Moving block; 65. Roller; 66. Lead screw; 67. Slide seat; 68. Connecting rod; 69. Second motor; 71. Vacuum adsorption plate; 72. Push-pull rod. Detailed Implementation

[0020] The technical solutions of this application will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] The following is combined with Figures 1-11 This describes the flaw detection device for post insulators provided in the embodiments of this application.

[0022] The flaw detection device for post insulators provided in this application includes a base 1, a lifting seat 2, a detection component, and a detection probe 4.

[0023] The base 1 provides a supporting foundation for the entire device, and is equipped with casters 15 at the bottom to facilitate flexible movement of the device at the testing site and quick adjustment to the corresponding position of the post insulator to be tested. A transmission screw 12 and a guide rod 13 extending along its height are fixedly installed on the base 1.

[0024] The lifting seat 2 is mounted on the base 1 via a transmission screw 12 and a guide rod 13. The middle part of the lifting seat 2 is threadedly connected to the transmission screw 12 through a threaded hole, and both ends are slidably engaged with the guide rod 13 through through holes. Pulleys are respectively fitted onto the transmission screw 12 and the output shaft of the first motor. A transmission belt is fitted onto both pulleys, connecting the transmission screw to the first motor 14. After the first motor 14 starts, it drives the transmission screw 12 to rotate. Under the limiting and guiding action of the guide rod 13, the lifting seat 2 smoothly rises and falls along the height direction of the base 1, thereby adjusting the detection component to a detection height suitable for the post insulator to be tested, meeting the detection requirements of post insulators of different heights.

[0025] The detection assembly is mounted on the lifting base 2. The assembly includes a first detection seat 31 and a second detection seat 32. The first detection seat 31 is located above the second detection seat 32. Both have identical structures and can move closer or further apart along a preset direction. During detection, the first detection seat 31 is located on the right side of the post insulator, and the second detection seat 32 is located on the left side of the post insulator, with the preset direction being along the radial direction of the post insulator. When the first detection seat 31 and the second detection seat 32 move to a coaxial position, the inner wall of the first detection seat 31 abuts against one side of the upper section of the post insulator to be tested, and the inner wall of the second detection seat 32 abuts against the other side of the lower section of the post insulator to be tested, achieving stable clamping and positioning of the post insulator.

[0026] In some specific embodiments, the first detection seat 31 and the second detection seat 32 respectively include a limiting sleeve 311, a guide sleeve 312, a gear ring 314, a first gear 315, and a second gear 316.

[0027] The limiting sleeve 311 is semi-annular. This semi-annular sleeve can be fitted radially onto the outer surface of the post insulator under test. The inner diameter of the limiting sleeve 311 matches the maximum outer diameter of the post insulator, ensuring a tight fit between the inner wall of the limiting sleeve 311 and the surface of the post insulator. Since post insulators are typically composed of multiple stacked insulating covers, there are gaps between adjacent insulating covers. The maximum outer diameter of the post insulator is also the maximum outer diameter of the insulating cover. Thus, the two semi-annular limiting sleeves 311 can respectively fit against the upper right outer wall and the lower left outer wall of the post insulator, ensuring the testing base is properly installed and preventing relative displacement during testing.

[0028] The guide sleeve 312 and the limiting sleeve 311 are coaxially arranged vertically. The guide sleeve 312 is fixedly connected to the limiting sleeve 311 through the vertical plate 313. The guide sleeve 312 has a notch. The central angle corresponding to this notch is 60°-120°, which can pass through the gap between two adjacent insulating covers of the post insulator, ensuring that the detection seat can be installed in place while the toothed ring 314 can rotate smoothly and continuously on the guide sleeve 312.

[0029] The toothed ring 314 has a notch that matches the notch of the guide sleeve 312. The toothed ring 314 is fitted into a groove on the outer wall of the guide sleeve 312 and can rotate freely around the central axis of the guide sleeve 312. The detection probe 4 is fixedly mounted on the toothed ring 314 via a connecting post. The detection probe 4 is an ultrasonic flaw detection probe used to transmit and receive ultrasonic signals to achieve defect detection. When the toothed ring 314 rotates, it drives the detection probe 4 to make a circular motion around the central axis of the guide sleeve 312, achieving 360° full coverage flaw detection on the outer surface of the post insulator to be tested.

[0030] The first gear 315 and the second gear 316 are the same size and are located on the outside of the gear ring 314, respectively, and mesh with the gear ring 314. The meshing point of the first gear 315 with the gear ring 314 is the first meshing point, and the meshing point of the second gear 316 with the gear ring 314 is the second meshing point. The arc length between the first and second meshing points on the gear ring 314 is greater than the arc length of the notch position on the gear ring 314. This ensures that the gear ring 314 maintains meshing with at least one of the first gear 315 and the second gear 316 during rotation, preventing the notch on the gear ring 314 from losing power when rotating between the two gears, thus ensuring the continuity of the detection process.

[0031] The first gear 315 and the second gear 316 are connected to the third motor 317 via pulleys and a transmission belt. Specifically, a flat plate is fixed on the upright plate, and the axles of the first gear 315 and the second gear 316 are rotatably mounted on the flat plate. Each axle is fitted with a pulley, and the two pulleys are connected by a transmission belt. One of the axles is connected to the third motor. After the third motor 317 is started, it drives the first gear 315 and the second gear 316 to rotate synchronously through the pulleys and the transmission belt, thereby driving the gear ring 314 to rotate around the central axis of the guide sleeve 312, realizing the circular motion detection of the detection probe 4.

[0032] In some specific embodiments, the device further includes two symmetrically distributed transmission mechanisms. One set of transmission mechanisms is connected to the first detection seat 31, and the other set is connected to the second detection seat 32. These mechanisms drive the first and second detection seats 31 to move closer or further apart, achieving clamping or releasing actions. The transmission mechanism includes a base plate 51, a connecting arm 52, a support frame 61, a spring 63, a moving block 64, and a lead screw 66. The base plate 51 is fixedly mounted on the lifting seat 2, and a guide hole 511 extending horizontally is provided on the base plate 51. The connecting arm 52 passes through the guide hole 511 and is supported on the base plate 51 by a horizontal plate 53. It can move horizontally along the guide hole 511. One end of the connecting arm 52 is fixedly connected to the limiting sleeve 311, which drives the limiting sleeve 311 to move synchronously. A support frame 61 is fixedly mounted on a base plate 51. A slider 62 is mounted on the support frame 61, and one end of the slider 62 is fixedly connected to the other end of a connecting arm 52 via a connecting rod. The slider 62 can slide along the length of the support frame 61. One end of a spring 63 abuts against the support frame 61, and the other end of the spring 63 is connected to one side of the slider 62. The length of the spring 63 is aligned with the extension direction of the guide hole 511, providing an elastic restoring force for the movement of the slider 62. A moving block 64 is located on the other side of the slider 62. The side of the moving block 64 closest to the slider 62 is a cylindrical curved surface. A roller 65 is mounted on the side of the slider 62 closest to the moving block 64. The roller 65 makes rolling contact with the cylindrical curved surface of the moving block 64, reducing frictional resistance. The lead screw 66 is located at the end of the support frame 61. The end of the lead screw and the output shaft of the second motor are respectively fitted with pulleys. The two pulleys are connected by a transmission belt. Thus, the lead screw 66 is connected to the second motor 69 through the pulleys and the transmission belt. The lead screw 66 is threaded with a slide block 67. The two sides of the slide block 67 are slidably engaged with the end of the support frame 61. The slide block 67 is also fixedly connected to the moving block 64 through the connecting rod 68.

[0033] After the second motor 69 starts, it drives the lead screw 66 to rotate via pulleys and a transmission belt, driving the slide block 67 to move axially along the lead screw 66. This, in turn, drives the moving block 64 to move in a direction perpendicular to the spring 63 via the connecting rod 68. When the moving block 64 moves, its curved surface generates a lateral thrust on the slider 62 through the roller 65. Under this thrust, the spring 63 is compressed or stretched, pushing the slider 62 to move along the length of the spring 63. This, in turn, drives the connecting arm 52 to move along the guide hole 511, ultimately allowing the first detection seat 31 and the second detection seat 32 to move closer or further apart, thus completing the clamping or releasing of the post insulator.

[0034] In some specific embodiments, a side plate 11 is provided on one side of the base 1, and a vacuum adsorption plate 71 is connected to the movable block 64 via a push-pull rod 72. The vacuum adsorption plate 71 adopts an electromagnetic vacuum adsorption structure, which generates a negative pressure adsorption force after being energized. The side plate 11 is used to cooperate with the vacuum adsorption plate 71 to achieve stable fixation of the device.

[0035] When the moving block 64 moves, the push-pull rod 72 drives the vacuum adsorption plate 71 to approach the side plate 11 on the base 1. After the detection seat completes the clamping and positioning of the post insulator, the vacuum adsorption plate 71 is attached to the side plate 11 and is tightly adsorbed onto the side plate 11 by the negative pressure adsorption, providing stable support for the entire detection assembly, preventing inaccurate detection results due to equipment shaking during the detection process, and further improving detection accuracy.

[0036] The working process of the flaw detection and testing device for post insulators in this application is as follows: The device is moved around the post insulator to be tested by using the casters 15 at the bottom of the base 1, so that the first test seat 31 and the second test seat 32 are respectively aligned with the upper and lower sections of the post insulator.

[0037] Start the first motor 14. The first motor 14 drives the transmission screw 12 to rotate through the pulley and transmission belt. Under the limiting action of the guide rod 13, the lifting seat 2 rises and falls smoothly in the height direction. Adjust the detection components to a suitable detection height so that the first detection seat 31 and the second detection seat 32 correspond to the upper and lower sections of the post insulator, respectively.

[0038] The second motor 69 is started, which drives the lead screw 66 to rotate via pulleys and a transmission belt, thereby moving the slide block 67, connecting rod 68, and moving block 64. The curved surface of the moving block 64 pushes the slider 62 to move via roller 65. The slider 62 drives the connecting arm 52 and the limiting sleeve 311 to move along the guide hole 511, so that the semi-annular limiting sleeve 311 of the first detection seat 31 abuts against the right outer wall of the upper section of the post insulator, and the semi-annular limiting sleeve 311 of the second detection seat 32 abuts against the left outer wall of the lower section of the post insulator, achieving stable clamping of the post insulator. At the same time, the moving block 64 drives the vacuum adsorption plate 7 to approach and adhere to the side plate 11 of the base 1 via the push-pull rod. The vacuum adsorption plate 7 activates negative pressure adsorption to stabilize and fix the device, preventing shaking during the detection process.

[0039] The third motor 317 is started, which drives the first gear 315 and the second gear 316 to rotate via pulleys and a transmission belt. Since the gears mesh with the gear ring 314, the gear ring 314 rotates around the central axis of the guide sleeve 312. As the gear ring 314 rotates, it drives the detection probe 4 to perform 360° all-around flaw detection on the outer surface of the post insulator to be tested. During the detection process, the notch in the gear ring 314 passes through the gap between adjacent insulating covers of the post insulator. Because the arc length between the first and second meshing points is greater than the arc length of the notch in the gear ring 314, it ensures that the gear ring 314 rotates continuously, and the detection is uninterrupted.

[0040] After the test is completed, turn off the third motor 317 to stop the movement of the test probe 4; turn off the negative pressure adsorption of the vacuum adsorption plate 7, start the second motor 69 to reverse, drive the first test seat 31 and the second test seat 32 to move away from each other, and release the support insulator; start the first motor 14 to adjust the lifting seat 2 to the initial height, and move the device to the next test position or storage position through the universal wheels 15.

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A flaw detection device for post insulators, characterized in that, include: Base; A lifting seat, which is mounted on the base and can move along the height direction of the base; The detection component is mounted on the lifting seat and includes a first detection seat and a second detection seat. The first detection seat is located above the second detection seat. The first detection seat and the second detection seat can move closer to or further away from each other in a preset direction. When the first detection seat and the second detection seat move to a position where they are coaxial, the inner wall of the first detection seat abuts against one side of the upper section of the post insulator to be tested, and the inner wall of the second detection seat abuts against the other side of the lower section of the surface of the post insulator to be tested. The detection probe is respectively disposed on the first detection seat and the second detection seat. The detection probe performs flaw detection on the outer surface of the post insulator to be tested by moving circumferentially around the central axis of the first detection seat or the second detection seat.

2. The flaw detection device for post insulators according to claim 1, characterized in that, The first detection seat and the second detection seat have the same structure, and each includes: A limiting sleeve, which is semi-circular, and whose inner wall can abut against the surface of the post insulator to be tested; A guide sleeve is provided, which is coaxially arranged with the limiting sleeve and connected to the limiting sleeve through a vertical plate. The guide sleeve has a notch. A toothed ring, having a notch, is fitted into a groove on the outer wall of the guide sleeve and can rotate around the central axis of the guide sleeve. A detection probe is mounted on the toothed ring and can rotate around the central axis of the guide sleeve under the drive of the toothed ring.

3. The flaw detection device for post insulators according to claim 2, characterized in that, The first detection seat and the second detection seat also include a first gear and a second gear, respectively. The first gear and the second gear mesh with the gear ring, the point where the first gear meshes with the gear ring is the first meshing point, and the point where the second gear meshes with the gear ring is the second meshing point. The arc length between the first meshing point and the second meshing point on the gear ring is greater than the arc length of the notch position on the gear ring.

4. The flaw detection device for post insulators according to claim 3, characterized in that, The first gear and the second gear are connected to the third motor via pulleys and a transmission belt.

5. The flaw detection device for post insulators according to any one of claims 2-4, characterized in that, It also includes symmetrically distributed transmission mechanisms, which are correspondingly connected to the first detection seat and the second detection seat. The transmission mechanisms include: A base plate is installed on the lifting seat, and a guide elongated hole is provided on the base plate; A connecting arm is inserted into the guide hole and mounted on the base plate via a horizontal plate. It can move along the guide hole and one end is connected to the limiting sleeve. A support frame is mounted on the base plate, and a slider is provided on the support frame. The slider is connected to the other end of the connecting arm. A spring is mounted on the support frame, with one end abutting against the support frame and the other end connected to one side of the slider; A movable block is disposed on the other side of the slider. The side of the movable block closest to the slider is curved. When the movable block moves in a direction perpendicular to the spring, the spring pushes the slider to move along the length of the spring, thereby driving the connecting arm to move along the guide hole.

6. The flaw detection device for post insulators according to claim 5, characterized in that, The slider is provided with a roller on the side near the moving block.

7. The flaw detection device for post insulators according to claim 6, characterized in that, The transmission mechanism also includes a lead screw, which is disposed at the end of the support frame. The lead screw is connected to the second motor via a pulley and a transmission belt. A slide block is threaded onto the lead screw, and the slide block is slidably engaged with the end of the support frame. The slide block is connected to the moving block via a connecting rod.

8. The flaw detection device for post insulators according to claim 5, characterized in that, The base is provided with a side plate, and the movable block is connected to a vacuum adsorption plate via a push-pull rod. The vacuum adsorption plate can approach the side plate under the action of the movable block and adsorb onto the side plate by negative pressure.

9. The flaw detection device for post insulators according to claim 1, characterized in that, The base is provided with a transmission screw and a guide rod extending along its height direction. The lifting seat is threadedly connected to the transmission screw, and the lifting seat is slidably engaged with the guide rod. The transmission screw is connected to the first motor via a pulley and a transmission belt.

10. The flaw detection device for post insulators according to claim 1, characterized in that, The base is equipped with casters.

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