A vibration acoustic test bench for post insulators

Abstract

The present application relates to insulator detection device technical field, and disclose a kind of post insulator vibration acoustic detection test bench, including bearing table and the detection instrument of being arranged on bearing table and being carried out to porcelain post insulator detection, the detection instrument moves on bearing table, rotating table is rotatably connected in bearing table, multiple direction clamping unit is located in rotating table, and a plurality of clamping blocks beyond the upper surface of rotating table are connected on multiple direction clamping unit.In the present application, when driving gear is engaged with gear ring, porcelain post insulator can be quickly clamped and fixed, when driving gear is engaged with gear ring, the detection position of porcelain post insulator can be rotated, and porcelain post insulator is detected in all directions, so that detection personnel can detect porcelain post insulator more conveniently and quickly using detection instrument, and improve the efficiency and accuracy of detecting porcelain post insulator.

Description

Technical Field

[0001] This invention relates to the field of insulator testing equipment technology, specifically to a vibration acoustic testing bench for post insulators. Background Technology

[0002] Porcelain post insulators are an important component of substation electrical equipment, playing a vital role in support and insulation. Due to manufacturing process issues and the influence of external environmental factors during long-term operation, porcelain post insulators often develop internal defects, leading to fracture failures and causing serious accidents in power equipment, endangering the safe and stable operation of the power grid. Therefore, strengthening the inspection and condition evaluation of porcelain post insulators and promptly grasping their defect status is of great significance to ensuring the safe operation of power equipment. Currently, most inspections of porcelain post insulators adopt vibration acoustic testing methods.

[0003] To facilitate the testing of porcelain post insulators, existing technologies have made numerous improvements to porcelain post insulator testing devices. For example, patent publication number CN109708834A discloses a vibration and acoustic testing bench for porcelain post insulators, consisting of a frame support assembly and a movable adjustment assembly used in conjunction with the frame support assembly. The beneficial effects of this porcelain post insulator vibration and acoustic testing bench are: it can quickly and stably fix the porcelain post insulator to be tested, and simultaneously allow for fine-tuning of the components fixing the porcelain post insulator according to testing needs, achieving precise and efficient testing requirements.

[0004] The aforementioned patents have significant beneficial effects, but in practical application, they still have the following shortcomings:

[0005] Existing technologies include large-volume porcelain post insulators. Therefore, when testing large-volume porcelain post insulators, a large test bench is required to place and fix them. As mentioned in the comparative document, the porcelain post insulators are quickly fixed. However, the fixing efficiency of the porcelain post insulators in the comparative document is slow, and it is not possible to fix porcelain post insulators of different heights. At the same time, the efficiency of omnidirectional testing of porcelain post insulators is low. Therefore, there is an urgent need in the field to improve the vibration and acoustic testing bench for post insulators to overcome the shortcomings of the existing technology. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a vibration acoustic testing bench for post insulators, improving the efficiency and accuracy of testing porcelain post insulators.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vibration acoustic testing bench for post insulators, comprising a support platform and a testing instrument mounted on the support platform for testing porcelain post insulators. The testing instrument moves on the support platform. A rotating platform is rotatably connected inside the support platform. A multi-directional clamping unit is provided inside the rotating platform. Several clamping blocks extending beyond the upper surface of the rotating platform are connected to the multi-directional clamping unit. The multi-directional clamping unit moves the clamping blocks and simultaneously fixes the porcelain post insulator in multiple directions. The multi-directional clamping unit is provided with a support for the upper part of the porcelain post insulator. The auxiliary support unit includes a multi-directional clamping unit comprising a drive motor located between the rotating platform and the bearing platform. The output end of the drive motor is fixedly connected to a drive gear for driving the multi-directional clamping unit. A lifting unit for moving the drive motor is provided in the lower part of the bearing platform. A gear ring that meshes with the drive gear is fixedly connected to the inner side wall of the bearing platform. A limiting unit for limiting the multi-directional clamping unit is provided on the side of the rotating platform. The lifting unit is used to drive the drive gear to mesh with the multi-directional clamping unit and the gear ring respectively. When the lifting unit drives the drive gear to mesh with the multi-directional clamping unit, the limiting unit fails.

[0008] Preferably, the multi-directional clamping unit includes a gear ring rotatably connected inside a rotating platform, the outer side of the gear ring being adapted to a driving gear, a driven gear rotatably connected inside the rotating platform and meshing with the inner sidewall of the gear ring, the upper end of the driven gear being higher than the gear ring, a plurality of sliding racks being slidably connected to the upper surface of the rotating platform, the sliding racks meshing with the driven gear, and the clamping block being disposed on the upper side of one end of the sliding racks.

[0009] Preferably, the lifting unit includes a support ring located at the bottom of the support platform, and the bottom of the support platform has an installation cavity adapted to the support ring. An electric telescopic rod is fixedly connected to the bottom of the installation cavity, and the lower end of the drive motor is slidably connected to the upper surface of the support ring.

[0010] Preferably, the limiting unit includes a limiting plate adapted to the outer side of the gear ring, the side of the rotating table has an opening slot adapted to the drive motor, the opening slot has a limiting sleeve adapted to the drive motor, a fixing plate is fixedly connected between the symmetrical sidewalls of the opening slot, a moving rod passes through the fixing plate, the limiting plate is fixedly connected to one end of the moving rod, a first wedge-shaped extrusion block is fixedly connected to the side of the moving rod, a first spring is fixedly connected between the side of the first wedge-shaped extrusion block and one side of the fixing plate, the drive gear has a rotating plate, and a second wedge-shaped extrusion block adapted to the first wedge-shaped extrusion block is fixedly connected to the rotating plate.

[0011] Preferably, the auxiliary support unit includes a vertical plate fixedly connected to the side of the clamping block, a guide rod passing through the vertical plate, an auxiliary clamping plate fixedly connected to one end of the guide rod, and a second spring sleeved on the side of the guide rod fixedly connected between one side of the auxiliary clamping plate and one side of the vertical plate.

[0012] Preferably, a waist-shaped groove is formed through the vertical plate, and sliding grooves are formed on the symmetrical sidewalls of the waist-shaped groove. A sliding block is slidably connected in the sliding groove. A threaded column is fixedly connected to the end of the sliding block away from the auxiliary clamping plate. A limit ring is threadedly connected to the side of the threaded column, and the guide rod passes through the sliding block and the threaded column.

[0013] Preferably, a movable block is fixedly connected to the lower end of the drive motor, and a movable groove adapted to the movable block is formed on the upper surface of the bearing ring.

[0014] Preferably, an annular arc groove is formed between the lower surface of the rotating platform and the bottom of the bearing platform, and ball bearings are provided in the annular arc groove.

[0015] Preferably, the clamping block is provided with an elastic clamping piece on its side, the bearing platform is provided with a main controller on its side, and the drive gear is provided with guide conical teeth at its upper and lower ends.

[0016] Preferably, a cover plate is installed on the upper surface of the rotating platform by screws, a damping rotating arm is fixedly connected to the bearing platform, the detector is installed at one end of the damping rotating arm, and the damping rotating arm is used to adjust the height and angle of the detector.

[0017] To address the shortcomings of existing technologies, this invention provides a vibration acoustic testing bench for post insulators, overcoming the deficiencies of existing technologies. The beneficial effects of this invention are as follows:

[0018] 1. In this invention, by setting up a multi-directional clamping unit, when the driving gear meshes with the toothed ring, the porcelain post insulator can be quickly clamped and fixed. When the driving gear meshes with the toothed ring, the detection position of the porcelain post insulator can be rotated, and the porcelain post insulator can be detected from all directions. This makes it more convenient and faster for the testing personnel to use the testing instrument to test the porcelain post insulator, and improves the efficiency and accuracy of the testing of the porcelain post insulator.

[0019] 2. In this invention, by setting an auxiliary support unit, when the vertical plate moves, it drives the auxiliary clamping plate to move. Under the tension of the second spring, the auxiliary clamping plate tightly clamps the upper part of the porcelain post insulator, thereby improving the stability when fixing the porcelain post insulator with a relatively high height.

[0020] 3. In this invention, by setting sliding blocks and sliding grooves, the position of the auxiliary clamping plate can be adjusted by the sliding blocks moving up and down in the sliding grooves, which can clamp the upper part of porcelain post insulators of different heights and improve the applicability of the overall device.

[0021] 4. In this invention, by setting a second spring and an auxiliary clamping plate, if it is necessary to change the clamping position of the porcelain post insulator, the drive motor is controlled to slightly loosen the clamping force of the clamping block on the porcelain post insulator. Due to the tension of the second spring, the auxiliary clamping plate will not temporarily detach from the side of the porcelain post insulator. After the inspector rotates the porcelain post insulator slightly, the clamping block clamps the porcelain post insulator again, which makes it more convenient for the inspector to conduct a comprehensive inspection of the porcelain post insulator.

[0022] 5. In this invention, by setting a damped rotating arm, the position of the detector can be adjusted using the damped rotating arm, making it more convenient for inspectors to conduct comprehensive inspections of porcelain post insulators and improving the inspection quality of porcelain post insulators.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a partial cross-sectional view of the support platform in this invention.

[0027] Figure 3 This is a schematic diagram of the overall cross-section of the present invention;

[0028] Figure 4 This is a schematic diagram of the sliding rack in this invention;

[0029] Figure 5 This is a schematic diagram of the toothed ring structure in this invention;

[0030] Figure 6 This is a schematic diagram of the structure in this invention where the moving block and the moving slot are separated;

[0031] Figure 7 This is a schematic diagram of the auxiliary support unit in this invention;

[0032] Figure 8 This is a schematic diagram of the limiting unit in this invention;

[0033] Figure 9 for Figure 3 Enlarged structural diagram at point A in the middle;

[0034] Figure 10 for Figure 3 Enlarged structural diagram at point B.

[0035] In the diagram: 1. Support platform; 2. Detector; 3. Rotating table; 4. Multi-directional clamping unit; 5. Clamping block; 6. Auxiliary support unit; 7. Drive motor; 8. Drive gear; 9. Gear ring; 10. Limiting unit; 11. Lifting unit; 12. Gear ring; 13. Driven gear; 14. Sliding rack; 15. Support ring; 16. Electric telescopic rod; 17. Opening slot; 18. Fixed plate; 19. Moving rod; 20. Limiting plate; 21. First wedge-shaped extrusion block; 22. First spring; 3. Rotating plate; 24. Second wedge-shaped extrusion block; 25. Vertical plate; 26. Auxiliary clamping plate; 27. Guide rod; 28. Second spring; 29. ​​Waist-shaped groove; 30. Sliding groove; 31. Sliding block; 32. Threaded column; 33. Limiting ring; 34. Moving block; 35. Moving groove; 36. Annular arc groove; 37. Ball bearing; 38. Elastic clamping piece; 39. Guide conical tooth; 40. Cover plate; 41. Damped rotating arm; 42. Main controller; 43. Mounting cavity; 44. Limiting sleeve. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-10A vibration acoustic testing bench for post insulators includes a support platform 1 and a testing instrument 2 mounted on the support platform 1 for testing porcelain post insulators. The testing instrument 2 moves on the support platform 1. A rotating platform 3 is rotatably connected inside the support platform 1. A multi-directional clamping unit 4 is provided inside the rotating platform 3. Several clamping blocks 5 extending beyond the upper surface of the rotating platform 3 are connected to the multi-directional clamping unit 4. The multi-directional clamping unit 4 moves the clamping blocks 5 and simultaneously fixes the porcelain post insulator in multiple directions. An auxiliary support unit 6 is provided on the multi-directional clamping unit 4 for supporting the upper part of the porcelain post insulator. The multi-directional clamping unit 4 includes components mounted on the rotating platform. The drive motor 7 between the rotating platform 3 and the support platform 1 has a drive gear 8 fixedly connected to its output end for driving the multi-directional clamping unit 4. The lower part of the support platform 1 is provided with a lifting unit 11 for moving the drive motor 7. The inner side wall of the support platform 1 is fixedly connected with a gear ring 9 that meshes with the drive gear 8. The side of the rotating platform 3 is provided with a limiting unit 10 for limiting the multi-directional clamping unit 4. The lifting unit 11 is used to drive the drive gear 8 to mesh with the multi-directional clamping unit 4 and the gear ring 9 respectively. When the lifting unit 11 drives the drive gear 8 to mesh with the multi-directional clamping unit 4, the limiting unit 10 is disabled. The side of the support platform 1 is provided with a main controller 42.

[0038] Using a lifting device, the porcelain post insulator is vertically placed at the center of the rotating platform 3. The lifting unit 11 is activated, causing the drive motor 7 to move upwards. The drive gear 8 disengages from the gear ring 9, and the lifting unit 11 drives the drive gear 8 to engage with the multi-directional clamping unit 4. Simultaneously, it pushes the limiting unit 10, causing the limiting unit 10 to lose its limiting effect on the multi-directional clamping unit 4. The drive motor 7 is then activated, and its output drives the drive gear 8 to rotate. The drive gear 8 then moves the multi-directional clamping unit 4, causing several clamping blocks 5 to move from multiple directions and clamp the lower end of the porcelain post insulator. Simultaneously, the auxiliary support unit 6 supports the upper part of the porcelain post insulator, placing the porcelain post insulator... When a post insulator tilts, the inspector uses the testing instrument 2 to inspect the porcelain post insulator. When a comprehensive inspection of the porcelain post insulator is required, the lifting unit 11 is activated to drive the drive motor 7 to move downwards. The drive gear 8 disengages from the multi-directional clamping unit 4, and the limiting unit 10 returns to its original position to limit and fix the multi-directional clamping unit 4. After the drive gear 8 moves downwards, it engages with the gear ring 9. The drive motor 7 is then activated. Through the engagement of the drive gear 8 and the gear ring 9, the drive motor 7 drives the entire rotating table 3 to rotate within the bearing platform 1. As the rotating table 3 rotates slowly, the testing instrument 2 performs a comprehensive inspection of the porcelain post insulator, improving the inspection efficiency of the porcelain post insulator.

[0039] The drive motor 7 mentioned above can be purchased from the market. It is a mature technology that has been fully disclosed, so it will not be repeated in the specification. The drive motor 7 is equipped with a power connection line, and it is electrically connected to the external main controller 42 and 220V phase voltage (or 380V line voltage) through the power connection line. The main controller 42 can be a conventional known device such as a computer that plays a control role.

[0040] It is worth noting that the aforementioned detector 2 is an existing known testing device that uses vibration acoustics specifically for testing porcelain post insulators.

[0041] As a technical optimization of the present invention, the multi-directional clamping unit 4 includes a gear ring 12 rotatably connected in the rotating table 3. The outer side of the gear ring 12 is adapted to the driving gear 8. A driven gear 13 that meshes with the inner side wall of the gear ring 12 is rotatably connected in the rotating table 3. The upper end of the driven gear 13 is higher than the gear ring 12. A plurality of sliding racks 14 are slidably connected on the upper surface of the rotating table 3. The sliding racks 14 mesh with the driven gears 13. The clamping block 5 is provided on the upper side of one end of the sliding rack 14.

[0042] When the driving gear 8 rotates, it drives the gear ring 12 to rotate. When the gear ring 12 rotates, it drives several driven gears 13 to rotate. When the several driven gears 13 rotate, they drive the corresponding sliding rack 14 to slide. When the sliding rack 14 moves, it drives the clamping block 5 to clamp the porcelain post insulator in multiple directions.

[0043] As a technical optimization of the present invention, the lifting unit 11 includes a bearing ring 15 disposed at the bottom of the bearing platform 1. The bottom of the bearing platform 1 is provided with an installation cavity 43 adapted to the bearing ring 15. An electric telescopic rod 16 is fixedly connected to the bottom of the installation cavity 43. The lower end of the drive motor 7 is slidably connected to the upper surface of the bearing ring 15. A moving block 34 is fixedly connected to the lower end of the drive motor 7. A moving groove 35 adapted to the moving block 34 is provided on the upper surface of the bearing ring 15.

[0044] There are multiple electric telescopic rods 16. The telescopic end of the electric telescopic rod 16 drives the bearing ring 15 to move up and down, which in turn drives the drive motor 7 to move up and down. At the same time, when the bearing ring 15 rotates, the moving block 34 moves along the moving groove 35 to limit the position of the drive motor 7.

[0045] The electric telescopic pole 16 mentioned above can be purchased from the market. It is a mature technology that has been fully disclosed, so it will not be repeated in the instruction manual. The electric telescopic pole 16 is equipped with a power connection line, and it is electrically connected to the external main controller 42 and 220V phase voltage (or 380V line voltage) through the power connection line. The main controller 42 can be a conventional known device such as a computer that plays a control role.

[0046] As a technical optimization of the present invention, the limiting unit 10 includes a limiting plate 20 adapted to the outer side of the toothed ring 12, an opening slot 17 adapted to the drive motor 7 is opened on the side of the rotating table 3, a limiting sleeve 44 adapted to the drive motor 7 is provided in the opening slot 17, a fixing plate 18 is fixedly connected between the symmetrical side walls in the opening slot 17, a moving rod 19 passes through the fixing plate 18, the limiting plate 20 is fixedly connected to one end of the moving rod 19, a first wedge-shaped extrusion block 21 is fixedly connected to the side of the moving rod 19, a first spring 22 is fixedly connected between the side of the first wedge-shaped extrusion block 21 and one side of the fixing plate 18, a rotating plate 23 is provided on the driving gear 8, a second wedge-shaped extrusion block 24 adapted to the first wedge-shaped extrusion block 21 is fixedly connected to the rotating plate 23, a guide conical tooth 39 is provided at the upper and lower ends of the driving gear 8, the rotating plate 23 is rotatably connected to the upper end of the guide conical tooth 39, the tooth cross section of the guide conical tooth 39 is triangular, and the guide conical tooth 39 plays a guiding role;

[0047] When the drive gear 8 rises, the second wedge-shaped pressing block 24 presses the first wedge-shaped pressing block 21, causing the first wedge-shaped pressing block 21 to move away from the gear ring 12. The moving rod 19 moves in the through hole opened on the fixed plate 18, and the limiting plate 20 moves away from the gear ring 12. The first spring 22 is compressed and contracts, losing its limiting effect on the gear ring 12. When the drive gear 8 moves down, the second wedge-shaped pressing block 24 moves down, and the tension of the first spring 22 pushes the first wedge-shaped pressing block 21 to move towards the gear ring 12. The limiting plate 20 meshes with the teeth of the gear ring 12, limiting the gear ring 12. When the drive gear 8 moves down and disengages from the gear ring 12, the first wedge-shaped pressing block 21 and the second wedge-shaped pressing block 24 do not disengage. When the drive gear 8 meshes with the gear ring 9 and rotates, the rotation of the rotating plate 23 will not affect the limiting plate 20's limiting effect on the gear ring 12.

[0048] As a technical optimization of the present invention, the auxiliary support unit 6 includes a vertical plate 25 fixedly connected to the side of the clamping block 5, a guide rod 27 passing through the vertical plate 25, an auxiliary clamping plate 26 fixedly connected to one end of the guide rod 27, a second spring 28 sleeved on the side of the guide rod 27 fixedly connected between one side of the auxiliary clamping plate 26 and one side of the vertical plate 25, a waist-shaped groove 29 passing through the vertical plate 25, a sliding groove 30 symmetrically opened in the side wall of the waist-shaped groove 29, a sliding block 31 slidably connected in the sliding groove 30, a threaded post 32 fixedly connected to one end of the sliding block 31 away from the auxiliary clamping plate 26, a limit ring 33 threadedly connected to the side of the threaded post 32, and the guide rod 27 passing through the sliding block 31 and the threaded post 32.

[0049] When clamping and fixing tall porcelain post insulators, the vertical plate 25 and the clamping block 5 are fixedly installed with screws. When the clamping block 5 moves, it drives the vertical plate 25 to move. When the vertical plate 25 moves, it drives the auxiliary clamping plate 26 to move. Under the tension of the second spring 28, the auxiliary clamping plate 26 tightly clamps the upper part of the porcelain post insulator. At the same time, when it is necessary to clamp the upper part of porcelain post insulators of different heights, the position of the auxiliary clamping plate 26 is adjusted by the sliding block 31 moving up and down in the sliding groove 30. After the adjustment is completed, the limiting ring 33 is threaded to the side of the threaded post 32. Tightening the limiting ring 33 fixes the position of the sliding block 31. The guide rod 27 has a rectangular cross section and limits the direction of the auxiliary clamping plate 26.

[0050] Meanwhile, if it is necessary to change the clamping position of the porcelain post insulator, the control drive motor 7 can slightly loosen the clamping force of the clamping block 5 on the porcelain post insulator. Due to the tension of the auxiliary clamping plate 26 under the second spring 28, it will not temporarily detach from the side of the porcelain post insulator. After the inspector rotates the porcelain post insulator slightly, the clamping block 5 can clamp the porcelain post insulator again, which makes it more convenient for the inspector to conduct a comprehensive inspection of the porcelain post insulator.

[0051] As a technical optimization of the present invention, an annular arc groove 36 is provided between the lower surface of the rotating platform 3 and the bottom of the bearing platform 1. A ball bearing 37 is provided in the annular arc groove 36. When the rotating platform 3 rotates, the friction is reduced by the ball bearing 37.

[0052] As a technical optimization of the present invention, the clamping block 5 is provided with an elastic clamping piece 38 on its side, the upper surface of the rotating table 3 is fitted with a cover plate 40 by screws, the bearing table 1 is fixedly connected with a damping rotating arm 41, the detector 2 is installed at one end of the damping rotating arm 41, the damping rotating arm 41 is used to adjust the height and angle of the detector 2, the elastic clamping piece 38 has a certain elasticity to protect the surface of the porcelain post insulator from damage, and the damping rotating arm 41 is used to adjust the detection position of the detector 2.

[0053] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0054] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration acoustic testing bench for post insulators, comprising a support platform (1) and a testing instrument (2) mounted on the support platform (1) for testing porcelain post insulators, characterized in that, The detector (2) moves on the support platform (1). The support platform (1) is rotatably connected to a rotating platform (3). The rotating platform (3) is provided with a multi-directional clamping unit (4). The multi-directional clamping unit (4) is connected with several clamping blocks (5) that extend beyond the upper surface of the rotating platform (3). The multi-directional clamping unit (4) moves several clamping blocks (5) and fixes the porcelain post insulator in multiple directions simultaneously. The multi-directional clamping unit (4) is provided with an auxiliary support unit (6) for supporting the upper part of the porcelain post insulator. The multi-directional clamping unit (4) includes a drive motor (7) located between the rotating platform (3) and the bearing platform (1). The output end of the drive motor (7) is fixedly connected to an active gear (8) for driving the multi-directional clamping unit (4). The lower part of the bearing platform (1) is provided with a lifting unit (11) for moving the drive motor (7). The inner side wall of the bearing platform (1) is fixedly connected with a gear ring (9) that meshes with the active gear (8). The side of the rotating platform (3) is provided with a limiting unit (10) for limiting the multi-directional clamping unit (4). The lifting unit (11) is used to drive the active gear (8) to mesh with the multi-directional clamping unit (4) and the gear ring (9) respectively. When the lifting unit (11) drives the active gear (8) to mesh with the multi-directional clamping unit (4), the limiting unit (10) is ineffective. The multi-directional clamping unit (4) includes a gear ring (12) rotatably connected in the rotating table (3). The outer side of the gear ring (12) is adapted to the driving gear (8). A driven gear (13) meshes with the inner side wall of the gear ring (12) and is rotatably connected in the rotating table (3). The upper end of the driven gear (13) is higher than the gear ring (12). A plurality of sliding racks (14) are slidably connected on the upper surface of the rotating table (3). The sliding racks (14) mesh with the driven gears (13). The clamping block (5) is provided on the upper side of one end of the sliding racks (14). The lifting unit (11) includes a bearing ring (15) located at the bottom of the bearing platform (1). The bottom of the bearing platform (1) has an installation cavity (43) adapted to the bearing ring (15). An electric telescopic rod (16) is fixedly connected to the bottom of the installation cavity (43). The lower end of the drive motor (7) is slidably connected to the upper surface of the bearing ring (15). The limiting unit (10) includes a limiting plate (20) adapted to the outer side of the gear ring (12). The rotating table (3) has an opening slot (17) adapted to the drive motor (7) on its side. The opening slot (17) is provided with a limiting sleeve (44) adapted to the drive motor (7). A fixing plate (18) is fixedly connected between the symmetrical side walls of the opening slot (17). A moving rod (19) passes through the fixing plate (18). The limiting plate (20) is fixedly connected to one end of the moving rod (19). A first wedge-shaped extrusion block (21) is fixedly connected to the side of the moving rod (19). A first spring (22) is fixedly connected between the side of the first wedge-shaped extrusion block (21) and one side of the fixing plate (18). A rotating plate (23) is provided on the driving gear (8). A second wedge-shaped extrusion block (24) adapted to the first wedge-shaped extrusion block (21) is fixedly connected to the rotating plate (23). When the drive gear (8) rises, the second wedge-shaped extrusion block (24) extrudes the first wedge-shaped extrusion block (21), causing the first wedge-shaped extrusion block (21) to move away from the gear ring (12). The moving rod (19) moves in the through hole opened on the fixed plate (18), the limiting plate (20) moves away from the gear ring (12), and the first spring (22) is compressed and contracts, losing its limiting effect on the gear ring (12).

2. The acoustic vibration testing bench for post insulators according to claim 1, characterized in that, The auxiliary support unit (6) includes a vertical plate (25) fixedly connected to the side of the clamping block (5), a guide rod (27) passing through the vertical plate (25), an auxiliary clamping plate (26) fixedly connected to one end of the guide rod (27), and a second spring (28) sleeved on the side of the guide rod (27) fixedly connected between one side of the auxiliary clamping plate (26) and one side of the vertical plate (25).

3. The acoustic vibration testing bench for post insulators according to claim 2, characterized in that, A waist-shaped groove (29) is provided through the vertical plate (25). A sliding groove (30) is provided on the symmetrical side wall of the waist-shaped groove (29). A sliding block (31) is slidably connected in the sliding groove (30). A threaded column (32) is fixedly connected to one end of the sliding block (31) away from the auxiliary clamping plate (26). A limit ring (33) is threadedly connected to the side of the threaded column (32). The guide rod (27) passes through the sliding block (31) and the threaded column (32).

4. The acoustic vibration testing bench for post insulators according to claim 1, characterized in that, The lower end of the drive motor (7) is fixedly connected to a moving block (34), and the upper surface of the bearing ring (15) is provided with a moving groove (35) that is adapted to the moving block (34).

5. The acoustic vibration testing bench for post insulators according to claim 1, characterized in that, An annular arc groove (36) is provided between the lower surface of the rotating platform (3) and the bottom of the bearing platform (1), and a ball bearing (37) is provided in the annular arc groove (36).

6. The acoustic vibration testing bench for post insulators according to claim 1, characterized in that, The clamping block (5) has an elastic clamping piece (38) on its side, the bearing platform (1) has a main controller (42) on its side, and the drive gear (8) has guide bevel teeth (39) at its upper and lower ends.

7. The acoustic vibration testing bench for post insulators according to claim 1, characterized in that, The upper surface of the rotating platform (3) is fitted with a cover plate (40) by screws. A damping rotating arm (41) is fixedly connected to the bearing platform (1). The detector (2) is installed at one end of the damping rotating arm (41). The damping rotating arm (41) is used to adjust the height and angle of the detector (2).

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