A porcelain post insulator detection device

Abstract

This invention discloses a testing device for porcelain post insulators, comprising a vertically telescopic rod and a support plate rotatably mounted on the telescopic end of the rod. A contact probe and a C-shaped support frame are mounted on the upper side of the support plate. The contact probe is mounted on a C-shaped gear frame, which is supported and limited by multiple sets of limiting wheels evenly distributed on the support frame. A drive motor is fixedly mounted on the support frame, and the output shaft of the drive motor is connected to a drive gear. The drive gear meshes with teeth on the outer periphery of the gear frame to drive the contact probe to rotate and scan around the insulator post. A damping rod is fixedly mounted on the telescopic end of the rod, and deflection plates are symmetrically fixedly connected to both ends of the damping rod. A connecting plate is hinged between the outer edge of the deflection plate and the edge of the support plate. The deflection plate, connecting plate, and damping rod cooperate to form an adaptive locking structure. This invention addresses the problem that conventional acoustic flaw detection methods are not effective in detecting damage at the connection between porcelain post insulators and their supports.

Description

Technical Field

[0001] This invention relates to the field of power equipment maintenance technology, specifically to a testing device for porcelain post insulators. Background Technology

[0002] In power plant electrical systems, porcelain post insulators serve as core support and insulation components, and their operational reliability directly determines the safety, stability, and economic continuity of the power system. These components are exposed to complex outdoor environments for extended periods, continuously enduring external factors such as alternating high and low temperatures, rain and snow erosion, wind and sand abrasion, and strong wind loads. Simultaneously, they are affected by internal factors such as manufacturing processes and installation stress impacts, making them highly susceptible to damage such as internal micro-cracks, pores, and impurities, which gradually expand over time. The connection between the porcelain post insulator and its support is a high-risk area for damage: this area is composed of three materials with significantly different coefficients of thermal expansion: porcelain, cement adhesive, and metal flanges. Under the thermal expansion and contraction caused by sudden temperature changes, significant shear stress is easily generated. If there is a lack of an effective buffer layer or defects in the adhesive bonding process, long-term stress accumulation can lead to the initiation of micro-cracks at the connection. Furthermore, the expansion of frozen moisture after intrusion further exacerbates the defect propagation, potentially leading to fracture failure and causing significant safety hazards and economic losses.

[0003] To mitigate the aforementioned risks, regular and accurate inspection of in-service porcelain post insulators has become a core aspect of power system operation and maintenance. Ultrasonic testing technology, with its high sensitivity in identifying internal defects, has become the mainstream testing method in the industry. By emitting pulsed sound waves and receiving reflected echoes, it can quantitatively determine the location and size of defects. Typical applications include integrated processes such as creeping wave testing and small-angle longitudinal wave testing. However, existing acoustic testing equipment faces a key technical bottleneck in practical applications: the connection between the porcelain post insulator and its support structure is physically obstructed by the supporting structure, creating a blind zone. This results in weakened, distorted, or even unreceived reflected echoes, making it difficult to accurately identify defects such as microcracks and cement adhesive detachment in this area. This blind zone and the high probability of damage at the connection point create a sharp contradiction: as the core area with the highest risk of damage, the inspection quality is significantly reduced due to the obstruction problem, not only failing to meet operation and maintenance needs but also potentially leaving hidden dangers due to missed or false detections. This causes great inconvenience to operators and hinders the improvement of power system operation and maintenance reliability. The purpose of this invention is to solve the problem that the commonly used acoustic flaw detection method in the prior art is not easy to detect the damage at the connection between the porcelain post insulator and the support with high quality, and to provide a porcelain post insulator detection device.

[0004] To address the shortcomings of the aforementioned technical problems, the present invention provides a porcelain post insulator testing device, comprising a vertically telescopic rod and a support plate rotatably mounted on the telescopic end of the rod. A contact probe and a C-shaped support frame are provided on the upper side of the support plate. The contact probe is mounted on a C-shaped gear frame, which is supported and limited by multiple sets of limiting wheels evenly distributed on the support frame. A drive motor is fixedly mounted on the support frame, and the output shaft of the drive motor is connected to a drive gear. The drive gear meshes with the teeth on the outer periphery of the gear frame to drive the contact probe to rotate and scan around the insulator post. The telescopic rod is fixedly equipped with a damping rod at its telescopic end. Deflection plates are symmetrically fixedly connected to both ends of the damping rod. A connecting plate is hinged between the outer edge of the deflection plate and the edge of the bearing plate. The deflection plate, the connecting plate, and the damping rod cooperate to form an adaptive locking structure. When the contact probe contacts the insulating column and the vertical displacement of the telescopic rod is used to adjust the angle of the contact probe, the adaptive locking structure can maintain the tilt detection posture of the bearing plate and the contact probe.

[0005] As a further optimization of the porcelain post insulator testing device of the present invention: the support frame is connected to the support plate through the adjustment frame. The adjustment frame consists of a lateral displacement frame and a longitudinal displacement frame. The adjustment frame can drive the support frame, the toothed frame and the contact probe to achieve bidirectional lateral and longitudinal displacement adjustment.

[0006] As a further optimization of the porcelain post insulator detection device of the present invention: sliding plates are symmetrically mounted on both the upper and lower sides of the contact probe. Several evenly distributed balls are rotatably embedded on the side of the sliding plate away from the contact probe. The balls are used to roll and contact the surface of the insulator, reducing the frictional resistance of the circumferential rotation of the contact probe, and at the same time assisting in pressing and limiting the insulator.

[0007] As a further optimization of the porcelain post insulator detection device of the present invention: the damping rod includes a damping sleeve fixed to the telescopic end of the telescopic rod, the damping sleeve is filled with damping fluid, a connecting rod is rotatably assembled inside the damping sleeve, and the two ends of the connecting rod pass through the damping sleeve and are fixedly connected to the deflection plate.

[0008] As a further optimization of the porcelain post insulator testing device of the present invention: both ends of the connecting rod passing through the damping sleeve are equipped with sealing discs, and several expansion plates immersed in damping fluid are uniformly fixed on the outer periphery of the connecting rod.

[0009] As a further optimization of the porcelain post insulator testing device of the present invention: a battery is fixedly installed at the bottom of the telescopic rod, and a triangular pyramid-shaped auxiliary frame is installed at the bottom end of the telescopic rod. The auxiliary frame and the battery work together to maintain the vertical state of the telescopic rod, and rollers are installed at the three apex corners of the bottom of the auxiliary frame.

[0010] As a further optimization of the porcelain post insulator testing device of the present invention: a positioning clamp is fixedly mounted on the telescopic rod body. The positioning clamp includes an extension rod fixed to the telescopic rod, and a docking clamp is fixed at the end of the extension rod. The docking clamp is used to snap the fixing rod and cooperate with the bottom auxiliary frame to limit the position of the telescopic rod.

[0011] As a further optimization of the porcelain post insulator detection device of the present invention: a positioning unit is provided at the connection between the support frame and the control frame, and the positioning unit is electrically connected to the control unit provided on the support plate.

[0012] As a further optimization of the porcelain post insulator detection device of the present invention: a monitoring unit is installed on both the support plate and the support frame, and the monitoring unit is signal-connected to the control unit.

[0013] As a further optimization of the porcelain post insulator detection device of the present invention: the telescopic rod is an electric telescopic rod, which can extend and retract vertically so that the contact probe can detect the insulator at different height positions.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting the contact probe to a tiltable and adjustable structure, allows for flexible adjustment of the acoustic wave incident angle based on the connection structure and obstruction position of the insulating column and the docking sleeve. This constructs a tilted acoustic wave detection path, effectively avoiding the obstruction and interference of the docking sleeve, fixing rod, and other supporting structures on the acoustic waves. It also solves the problem that traditional equipment can only detect vertically and cannot cover hidden damage at the connection point. Specifically, through the rolling contact and limiting of the sliding plates on both sides of the probe with the insulating column, combined with the vertical height adjustment of the telescopic column, the probe can adaptively adapt to the surface curvature and installation tilt angle of the insulating column during tilt detection and circumferential scanning, reducing frictional resistance and avoiding probe offset and tilt angle deviation caused by rigid contact. Simultaneously, a hinged structure of the deflection plate and connecting plate, combined with the damping buffer characteristics of the damping rod, constructs a stable tilt angle adjustment base. When the bearing plate tilts or the contact probe deflects to the detection angle, the relative rotation of the deflection plate and connecting plate creates a certain mechanical dead angle, achieving a certain passive mechanical locking. Combined with the damping limiting effect of the damping rod, this effectively locks the tilt posture of the equipment, preventing arbitrary swaying and rebound offset. Meanwhile, the device can rely on the contact limiting effect of the sliding plate and the surface of the insulating column, combined with the vertical displacement of the telescopic rod, to achieve adaptive angle fine adjustment of the contact probe. That is, it can adapt the tilt detection angle according to the outer contour curvature of the insulator, the installation tilt angle, and the connection structure of the mating sleeve, which not only ensures the flexibility and adaptability of the probe tilt angle adjustment, but also realizes the angle constraint of the contact probe. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the axial structure of the present invention; Figure 2This is an enlarged structural diagram of point A in the present invention; Figure 3 This is a schematic diagram of the first state structure when the present invention is used; Figure 4 This is a schematic diagram of the second state structure when the present invention is used; Figure 5 This is a schematic diagram of the third state structure when the present invention is used; Figure 6 This is a cross-sectional structural diagram of the second state of the present invention; Figure 7 This is a cross-sectional structural diagram of the third state of the present invention; Figure 8 This is a partial cross-sectional structural diagram of the present invention; The diagram shows the following components: 1. Roller; 2. Auxiliary frame; 3. Battery; 4. Telescopic rod; 5. Positioning clamp; 501. Extension rod; 502. Docking clamp; 6. Connecting plate; 7. Deflection plate; 8. Damping rod; 801. Connecting rod; 802. Damping sleeve; 803. Sealing disc; 804. Expansion plate; 805. Damping fluid; 9. Control unit; 10. Monitoring unit; 11. Bearing plate; 12. Control frame; 13. Drive motor; 14. Positioning unit; 15. Contact probe; 16. Gear frame; 17. Limiting wheel; 18. Sliding plate; 19. Bearing frame; 20. Fixing rod; 21. Docking sleeve; 22. Insulating column; 23. Sound wave path. Detailed Implementation

[0016] To better understand the present invention, the following embodiments further illustrate the content of the present invention, but the content of the present invention is not limited to the following embodiments.

[0017] like Figure 6 and Figure 7 As shown, a porcelain post insulator testing device is available, suitable for on-site non-destructive testing of porcelain post insulators in power plants. It includes a contact probe 15, which employs ultrasonic testing principles. The probe can be attached to the outer surface of the insulator post 22 to transmit and receive ultrasonic signals and has multi-angle tilt adjustment capabilities. By adjusting the probe's tilt, an inclined acoustic wave path 23 can be constructed, avoiding the drawback of the traditional vertical testing mode where the acoustic wave first penetrates the mating sleeve 21 before detecting the connection between the insulator post 22. This effectively avoids the problems of the mating sleeve 21 blocking, interfering with, and attenuating the acoustic wave signal, eliminating blind spots caused by the supporting structure, and significantly improving the detection accuracy and quality of hidden damage such as micro-cracks, adhesive layer peeling, and loosening at the critical connection points between the insulator post 22 and the mating sleeve 21.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, to achieve omnidirectional, blind-spot-free circumferential inspection of the insulator, the contact probe 15 is fixedly mounted inside the C-shaped toothed frame 16. The toothed frame 16 provides stable support and circumferential movement for the contact probe 15. The toothed frame 16 adopts a C-shaped open structure, accommodating lateral docking between the toothed frame 16 and the insulating post 22. This means the toothed frame 16 can be directly snapped into place from the outside of the insulating post 22 without disassembling the insulator equipment, adapting to various testing conditions, including live and de-energized environments. The bottom and outer side of the toothed frame 16 are supported and limited by multiple sets of evenly arranged limiting wheels 17. All limiting wheels 17 are fixedly installed inside the C-shaped support frame 19. The multiple sets of limiting wheels 17 are evenly distributed in a ring, providing balanced circumferential support for the toothed frame 16, effectively limiting radial and axial displacement, ensuring coaxiality and stability during rotation, and reducing the impact of shaking on testing accuracy. Meanwhile, a drive motor 13 is fixedly mounted on the outer side of the C-shaped support frame 19. The output shaft of the drive motor 13 is coaxially fixedly connected to a drive gear, which precisely meshes with the annular teeth on the outer circumference of the gear frame 16 for transmission. During operation, the drive motor 13 outputs power to drive the drive gear to rotate, which in turn drives the gear frame 16 to rotate as a whole through the gear meshing transmission principle. This, in turn, drives the contact probe 15 mounted on the inner side to synchronously move around the insulating column 22 at a uniform circumference. The C-shaped notch structure matched between the support frame 19 and the gear frame 16 can quickly adapt to the radial insertion of the insulating column 22, so that the insulating column 22 automatically occupies the center detection position between the support frame 19 and the gear frame 16. Through the continuous circumferential rotation of the gear frame 16, the contact probe 15 is driven to traverse the entire outer circumference of the insulating column 22, realizing a full-coverage scanning detection of the insulator column. This avoids, to a certain extent, the problem of incomplete detection in traditional fixed-point detection and local detection, and ensures the integrity of the overall damage detection of the insulator.

[0019] To adapt to the testing needs of porcelain post insulators of different specifications and installation positions, and to ensure precise contact between the contact probe 15 and the insulator, an adjustable control frame 12 is mounted on the outside of the support frame 19. This control frame 12 is composed of a horizontal displacement frame and a vertical displacement frame, providing precise two-way horizontal and vertical displacement adjustment. Through coordinated control of horizontal and vertical displacement, the support frame 19, the toothed frame 16, and the contact probe 15 can be moved as a whole, quickly calibrating the C-shaped notch position of the support frame 19 and the toothed frame 16, ensuring precise alignment between the notch and the insulator post 22 under test. Ultimately, the insulator post 22 is precisely positioned at the center detection reference position of the support frame 19 and the toothed frame 16, adapting to the testing conditions of insulators with different diameters and installation deviations. To further improve the accuracy and intelligence of the position adjustment, a positioning unit 14 is set at the connection and fixing position between the support frame 19 and the control frame 12. The positioning unit 14 preferably uses an infrared detector as its core positioning component. The infrared detector can collect the position coordinates, central axis and outer contour data of the insulating column 22 in real time, and transmit the detection signal to the control unit 9 in real time to assist the control frame 12 in completing precise displacement fine adjustment. On the one hand, it ensures that the contact probe 15 is in close contact with the outer surface of the insulating column 22 and maintains a stable detection contact state; on the other hand, it ensures that the insulating column 22 is always in the equipment detection center reference, and ensures that the distance between the contact probe 15 and the surface of the insulator is uniform and the pressure is constant during the rotation of the contact probe 15. From the structural alignment level, it ensures the overall detection accuracy and detection stability of the insulator damage detection.

[0020] The control frame 12 is fixedly installed on the upper surface of the support plate 11, serving as the support base for the entire detection execution structure and ensuring the integrity and stability of the assembly of each moving part. A control unit 9 is fixedly installed on one side of the bottom of the support plate 11. The control unit 9 is the core control hub of this device, electrically connected to the positioning unit 14, contact probe 15, drive motor 13, and various functional components. It enables integrated automatic control of equipment start-up and shutdown, position calibration, ultrasonic detection, circumferential scanning, and data acquisition, automating the entire process of detecting damage to the insulating column 22 and reducing human error. The center of the support plate 11 is rotatably connected to the telescopic end of the telescopic rod 4. A damping rod 8 is fixedly installed at the telescopic end of the telescopic rod 4. Deflection plates 7 are symmetrically fixedly installed at both ends of the damping rod 8. The outer edges of the two deflection plates 7 and the two ends of the support plate 11 opposite to the telescopic rod 4 are connected by a hinged connecting plate 6 to form a linkage structure, constructing a support base structure that can adaptively level and damped limit. Meanwhile, sliding plates 18 are symmetrically mounted on the upper and lower sides of the contact probe 15. Each sliding plate 18 has several evenly arranged balls rotatably embedded on its end face away from the contact probe 15. During the inspection process, the balls can directly roll into contact with the outer surface of the insulating post 22, replacing the traditional sliding friction contact method. While ensuring probe contact inspection, this significantly reduces the sliding friction between the contact probe 15, the sliding plate 18, and the surface of the insulating post 22, reducing the problems of jamming and offset when the probe rotates circumferentially. This protects the surface of the insulator porcelain body from wear and ensures the smoothness and stability of the probe's circumferential scanning.

[0021] like Figure 4 and Figure 5 As shown, under the telescopic driving action of the telescopic rod 4, the sliding plate 18 and the ball bearings can moderately press against the surface of the insulating column 22 to achieve temporary limiting and fixing of the equipment and the insulator, thus preventing equipment displacement during the testing process. Based on the ball bearing pressing and limiting, the tilt angle of the bearing plate 11 can be finely adjusted according to the curvature of the insulator surface and the installation tilt angle. During the tilting process of the bearing plate 11, the hinged connecting plate 6 will pull the deflection plates 7 on both sides to rotate synchronously. After the connecting plate 6 and the deflection plates 7 rotate relative to each other, a certain limiting triangular dead angle structure is formed, which can form a certain mechanical locking limit on the tilted bearing plate 11, effectively maintaining the tilted testing posture of the bearing plate 11, and adapting to the testing conditions of insulators with tilted installation and installation deviation. Meanwhile, during the rotation of the deflection plate 7, the damping and buffering characteristics of the damping rod 8 can flexibly limit the deflection amplitude and the tilt angle of the bearing plate 11, avoiding the problem of excessive probe pressure and insulator damage caused by rigid top pressure. This allows for the control of the top pressure between the sliding plate 18 and the insulating column 22, achieving flexible bonding detection. While ensuring the positioning stability of the equipment, it maintains the optimal ultrasonic detection bonding state and steadily improves the quality of damage detection of the insulating column 22.

[0022] To enable remote operation and intelligent testing of the equipment, monitoring units 10 are installed in the corresponding testing areas of the support plate 11 and the support frame 19. The monitoring unit 10 can collect real-time on-site testing images, equipment operating status, and probe testing parameters, and establish signal transmission linkage with the control unit 9. Operators can remotely monitor the entire testing process in real time through the back-end terminal, and can also remotely issue control commands to complete operations such as equipment adjustment, testing start / stop, and data retrieval, significantly reducing the risks of high-altitude and high-risk operations on site, and improving the convenience and safety of testing operations. To meet the requirements of mobile operation without external power supply, a battery 3 is fixedly installed at the bottom of the telescopic pole 4 to provide a stable power supply for the motor, probe, positioning unit 14, monitoring unit 10, and control unit 9 of the entire equipment, enabling the equipment to work independently without an external power supply, facilitating personnel to carry and transfer it, and adapting to on-site testing operations of insulators in different locations in substations and factory areas. The bottom of the telescopic pole 4 is equipped with a triangular pyramid-shaped auxiliary frame 2. The auxiliary frame 2 adopts a triangular stabilizing structure, which can cooperate with the bottom circular battery 3 structure to effectively limit the lateral swaying and radial displacement of the telescopic pole 4, ensuring the stability of the overall vertical installation posture of the telescopic pole 4. At the same time, each of the three apex positions of the bottom of the auxiliary frame 2 is equipped with a moving roller 1. Through the three-point roller 1 support structure, the entire set of equipment can be flexibly moved, which facilitates the quick transfer of equipment by operators and completes the batch inspection of porcelain post insulators in different locations in the factory area, greatly improving the efficiency of the inspection operation.

[0023] The telescopic rod 4 is preferably an electric telescopic rod 4, which has a vertical telescopic adjustment function, and can flexibly adjust the overall equipment height according to the installation height of the porcelain post insulator to be tested and the obstruction position of the fixed rod 20. On the one hand, through height adjustment, the contact probe 15 can smoothly cross the obstruction structure such as the fixed rod 20 at the bottom of the insulator, and fit into the area to be tested on the insulator, avoiding the detection blind spot caused by the obstruction of the fixed rod 20; on the other hand, it can realize multi-point height adjustment of the contact probe 15 in the vertical direction of the insulator, and can perform layered scanning detection on different height areas such as the upper, middle, and lower sections of the insulator post and the connection of the connecting sleeve 21, so as to realize the detection of the insulator at all heights and all areas, and further improve the comprehensiveness and applicability of the equipment detection.

[0024] like Figure 8As shown, the damping rod 8 adopts a flexible damping structure with built-in damping fluid 805. Specifically, it includes a damping sleeve 802 fixedly mounted on the telescopic end of the telescopic rod 4. The damping sleeve 802 is hollow and filled with damping fluid 805. A connecting rod 801 is rotatably mounted inside the damping sleeve 802. Both ends of the connecting rod 801 pass through the damping sleeve 802 and are fixedly connected to the deflection plates 7 on both sides, realizing the linkage transmission between the deflection plates 7 and the damping rod 8. Both ends of the connecting rod 801 that pass through the damping sleeve 802 are sealed with sealing discs 803. The double-layer sealing structure achieves complete sealing inside the damping sleeve 802, effectively preventing leakage and loss of the internal damping fluid 805, and ensuring the long-term working performance and service life of the damping structure. Meanwhile, multiple extension plates 804 are evenly fixedly mounted on the outer periphery of the connecting rod 801. These extension plates 804 are completely submerged in the damping fluid 805, significantly increasing the contact area between the connecting rod 801 and the damping fluid 805 during rotation. This effectively increases the rotational damping force, ensuring uniform and stable damping during the rotation of the connecting rod 801 and the deflection plate 7. This prevents excessively rapid deflection and angle loss of control, enabling smooth fine-tuning and stable limiting of the tilt angle of the bearing plate 11, and ensuring a constant detection posture. Furthermore, the outer periphery of the damping cylinder is threaded with sealing screws for operators to inject and replace the damping fluid 805. The end of the damping cylinder is sealed with a cap, which is threadedly connected to the damping cylinder for easy disassembly and replacement of the connecting rod 801.

[0025] To further enhance the stability of equipment operation, a positioning clamp 5 is fixedly mounted on the telescopic rod 4. The positioning clamp 5 includes an extension rod 501 fixed to the side wall of the telescopic rod 4, and a docking clamp 502 is fixed to the end of the extension rod 501. During the inspection operation, the docking clamp 502 can be snapped onto the insulator-matching fixed rod 20 or the surrounding fixed structure, forming a double positioning structure with the bottom triangular auxiliary frame 2, further locking the vertical posture of the telescopic rod 4 to avoid shaking, displacement, or tilting of the telescopic rod 4 during equipment inspection. This continuously ensures the positional accuracy and fit stability of the contact probe 15 during the surrounding inspection process, further improving the accuracy and reliability of insulator damage detection from the equipment structure level.

[0026] It should be noted that the specific structure, circuit connection method, signal transmission principle and conventional operation control method of the positioning unit 14, monitoring unit 10, damping fluid 805, control unit 9, ultrasonic contact probe 15 and battery 3 involved in this embodiment are all existing mature technologies in the field and are well known to those skilled in the art. Therefore, their specific structure and working principle will not be described in detail in this article.

[0027] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A porcelain post insulator detection device, characterized by: It includes a vertically telescopic rod (4) and a support plate (11) rotatably mounted on the telescopic end of the telescopic rod (4). The upper side of the support plate (11) is provided with a contact probe (15) and a C-shaped support frame (19). The contact probe (15) is mounted on a C-shaped gear frame (16). The gear frame (16) is supported and limited by multiple sets of limiting wheels (17) evenly arranged on the support frame (19). A drive motor (13) is fixedly installed on the support frame (19). The output shaft of the drive motor (13) is connected to a drive gear. The drive gear meshes with the teeth arranged on the outer periphery of the gear frame (16) to drive the gear frame (16) to drive the contact probe (15) to rotate and scan around the insulating column (22). The telescopic rod (4) is fixedly equipped with a damping rod (8) at its telescopic end. The two ends of the damping rod (8) are symmetrically fixedly connected with deflection plates (7). A connecting plate (6) is hinged between the outer edge of the deflection plate (7) and the edge of the bearing plate (11). The deflection plate (7), the connecting plate (6) and the damping rod (8) cooperate to form an adaptive locking structure. When the contact probe (15) contacts the insulating column (22) and adjusts the angle of the contact probe (15) in coordination with the vertical displacement of the telescopic rod (4), the adaptive locking structure can maintain the tilt detection posture of the bearing plate (11) and the contact probe (15).

2. A porcelain post insulator detection device as claimed in claim 1, characterized in that: The support frame (19) is connected to the support plate (11) through the control frame (12). The control frame (12) consists of a transverse displacement frame and a longitudinal displacement frame. The control frame (12) can drive the support frame (19), the gear frame (16) and the contact probe (15) to achieve bidirectional displacement adjustment in the transverse and longitudinal directions.

3. A porcelain post insulator detection device as claimed in claim 1, characterized in that: The upper and lower sides of the contact probe (15) are symmetrically equipped with sliding plates (18). The side of the sliding plate (18) away from the contact probe (15) is rotatably fitted with several evenly distributed balls. The balls are used to roll and contact the surface of the insulating column (22) to reduce the frictional resistance of the circumferential rotation of the contact probe (15) and at the same time assist in pressing and limiting the insulating column (22).

4. The porcelain post insulator testing device as described in claim 1, characterized in that: The damping rod (8) includes a damping sleeve (802) fixed to the telescopic end of the telescopic rod (4). The damping sleeve (802) is filled with damping fluid (805). A connecting rod (801) is rotatably assembled inside the damping sleeve (802). Both ends of the connecting rod (801) pass through the damping sleeve (802) and are fixedly connected to the deflection plate (7).

5. The porcelain post insulator testing device as described in claim 4, characterized in that: The connecting rod (801) is fitted with sealing discs (803) at both ends of the damping sleeve (802), and several expansion plates (804) immersed in damping fluid (805) are uniformly fixed on the outer periphery of the connecting rod (801).

6. The porcelain post insulator testing device as described in claim 1, characterized in that: The telescopic rod (4) is fixedly equipped with a battery (3) at the bottom. A triangular cone-shaped auxiliary frame (2) is installed at the bottom end of the telescopic rod (4). The auxiliary frame (2) and the battery (3) work together to maintain the telescopic rod (4) in a vertical state. Rollers (1) are installed at the three apex corners of the bottom of the auxiliary frame (2).

7. The porcelain post insulator testing device as described in claim 1, characterized in that: The telescopic rod (4) is fixedly equipped with a positioning clip (5). The positioning clip (5) includes an extension rod (501) fixed to the telescopic rod (4). A docking clip (502) is fixed at the end of the extension rod (501). The docking clip (502) is used to snap the fixing rod (20) and cooperate with the bottom auxiliary frame (2) to limit the position of the telescopic rod (4).

8. The porcelain post insulator testing device as described in claim 1, characterized in that: A positioning unit (14) is provided at the connection between the support frame (19) and the control frame (12), and the positioning unit (14) is electrically connected to the control unit (9) provided on the support plate (11).

9. The porcelain post insulator testing device as described in claim 9, characterized in that: Both the support plate (11) and the support frame (19) are equipped with monitoring units (10), and the monitoring units (10) are connected to the control unit (9) via signals.

10. The porcelain post insulator testing device as described in claim 1, characterized in that: The telescopic rod (4) is an electric telescopic rod (4), which can extend and retract vertically so that the contact probe (15) can detect the insulating column (22) at different height positions.

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