A porcelain insulator insulation performance detection probe positioning tool
Patent Information
- Application Number
- CN202521849314.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-29
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-08-29
AI Technical Summary
[0004]因此，本实用新型目的是提供一种瓷质绝缘子绝缘性能检测探针定位工装，解决了，现有的瓷质绝缘子绝缘性能检测探针定位工装在使用时，传统工装多为固定尺寸结构，仅适配单一型号绝缘子，面对不同直径、不同裙边数量的绝缘子需频繁更换工装，操作效率低，同时依赖人工目视对准，易受操作人员经验影响，探针与检测面垂直度偏差较大，导致接触电阻增大，并且检测过程中探针易因绝缘子表面弧度产生滑移，尤其在潮湿环境下，滑移量较大，影响检测重复性的问题
1.本实用新型，通过环形导轨、 T 形滑块和伸缩定位臂的组合结构，可灵活适配不同直径、不同裙边数量的瓷质绝缘子，T 形滑块能沿环形导轨的 T 型滑槽自由滑动，配合伸缩定位臂的长度调节，无需频繁更换工装，即可完成多种规格绝缘子的检测作业，同时减少工装储备数量，降低设备投入与维护成本，并且通过环形导轨表面的角度刻度线可辅助精准调整 T 形滑块的圆周分布位置，配合旋转关节顶部的激光校准器，能快速将探针主体轴线对准检测点，避免人工目视对准的经验误差，探针安装座内的探针导向套与探针主体间隙极小，可有效控制探针与检测面的垂直度偏差，减少接触电阻波动，使检测数据重复性误差降低。
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Figure CN224758600U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power equipment testing technology, specifically to a positioning fixture for a probe for testing the insulation performance of porcelain insulators. Background Technology
[0002] As a key insulating component in the power system, the insulation performance of porcelain insulators directly affects the safety of power grid operation. During insulation performance testing (such as insulation resistance testing and dielectric loss testing), the test probe must be tightly fitted to the designated area of the metal flange or skirt on the surface of the insulator, and the positional deviation of the probe must be controlled within ±0.5mm, otherwise the test data will be distorted. However, existing positioning fixtures for testing the insulation performance of porcelain insulators are often fixed in size and only suitable for a single type of insulator. When dealing with insulators of different diameters and skirt numbers, the fixtures need to be changed frequently, resulting in low operational efficiency. In addition, they rely on manual visual alignment, which is easily affected by the operator's experience. The perpendicularity deviation between the probe and the test surface is large, leading to increased contact resistance. Furthermore, the probe is prone to slippage due to the curvature of the insulator surface during the test, especially in humid environments, where the slippage is significant and affects the repeatability of the test. Therefore, we propose a positioning fixture for testing the insulation performance of porcelain insulators. Utility Model Content
[0003] In view of the problems existing in the positioning tooling for testing the insulation performance of porcelain insulators, this utility model is proposed.
[0004] Therefore, the purpose of this utility model is to provide a positioning fixture for a probe used to test the insulation performance of porcelain insulators. This solves the problems of existing positioning fixtures for porcelain insulator insulation performance testing, which are mostly fixed-size structures that can only be used with a single type of insulator. When dealing with insulators of different diameters and different numbers of skirts, the fixtures need to be changed frequently, resulting in low operating efficiency. At the same time, they rely on manual visual alignment, which is easily affected by the operator's experience. The perpendicularity deviation between the probe and the test surface is large, leading to increased contact resistance. Furthermore, the probe is prone to slippage due to the curvature of the insulator surface during the test, especially in humid environments, where the slippage is large and affects the repeatability of the test.
[0005] To achieve the above objectives, this utility model provides the following technical solution: A positioning fixture for a probe used to test the insulation performance of a porcelain insulator includes a base, an annular guide rail, and a telescopic positioning arm. The top of the base has a mounting groove, inside which the annular guide rail is fixedly mounted. The inner side of the annular guide rail has a T-shaped groove, inside which multiple T-shaped sliders slide. A telescopic positioning arm is fixedly mounted on one side of each of the multiple T-shaped sliders. A rotary joint is fixedly mounted on the moving end of each of the multiple telescopic positioning arms, and a probe mounting base is fixedly mounted on the other end of each of the multiple rotary joints. An insulator positioning platform is fixedly mounted at the bottom of the mounting groove, and the surface of the insulator positioning platform has a V-shaped groove.
[0006] Preferably, each of the plurality of probe mounting bases has a stepped hole inside, and a probe guide sleeve, a buffer spring and a pressure sensor are sequentially arranged inside the plurality of stepped holes, and a probe body is arranged inside the plurality of probe guide sleeves.
[0007] Preferably, the top of the annular guide rail is provided with an annular limiting groove, and the tops of the plurality of T-shaped sliders are threaded with fixing rods, and the plurality of fixing rods are slidably connected to the annular limiting groove.
[0008] Preferably, the surface of the annular guide rail is provided with angle scale lines, and a laser calibrator is fixedly installed on the top of the plurality of rotating joints.
[0009] Preferably, both sides of the base are threaded with adjusting rods, and a fixing plate is fixedly installed on the opposite side of each of the two adjusting rods, and a rubber buffer layer is fixedly installed on the opposite side of each of the two fixing plates.
[0010] Preferably, a plurality of support threaded rods are fixedly installed at the bottom of the base, and a support cylinder is slidably provided at the bottom of each of the plurality of support threaded rods. An internal threaded ring is rotatably provided at the top of each of the plurality of support cylinders, and the plurality of internal threaded rings are respectively threadedly connected to the plurality of support threaded rods.
[0011] The technical effects and advantages provided by this utility model in the above technical solution are as follows: 1. This utility model, through the combined structure of an annular guide rail, a T-shaped slider, and a telescopic positioning arm, can flexibly adapt to porcelain insulators of different diameters and skirt numbers. The T-shaped slider can slide freely along the T-shaped groove of the annular guide rail. With the length adjustment of the telescopic positioning arm, the testing of insulators of various specifications can be completed without frequent tooling changes. At the same time, it reduces the number of tooling reserves, lowers equipment investment and maintenance costs, and the angle scale lines on the surface of the annular guide rail can help to accurately adjust the circumferential distribution position of the T-shaped slider. With the laser calibrator at the top of the rotating joint, the probe body axis can be quickly aligned with the test point, avoiding the experience error of manual visual alignment. The gap between the probe guide sleeve and the probe body in the probe mounting base is extremely small, which can effectively control the perpendicularity deviation between the probe and the test surface, reduce contact resistance fluctuations, and reduce the repeatability error of the test data.
[0012] 2. In this utility model, the buffer spring inside the probe mounting base provides stable contact pressure, and the pressure sensor monitors pressure changes in real time. This ensures that the probe is in close contact with the insulator detection surface, while also preventing damage to the insulator due to excessive pressure. The V-groove of the insulator positioning table can perform preliminary positioning of the insulator. The adjusting rods, fixing plates, and rubber buffer layers on both sides of the base can clamp the insulator from both sides, effectively preventing the insulator from shifting during the detection process. At the same time, the rubber buffer layer can also prevent scratches caused by direct contact between the fixing plate and the insulator surface. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the annular guide rail of this utility model; Figure 3 This is a top view schematic diagram of the annular guide rail structure of this utility model; Figure 4 This is a schematic diagram of the overall structure of the telescopic positioning arm of this utility model; Figure 5 This is a schematic cross-sectional view of the probe mounting base of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the base of this utility model.
[0015] Explanation of reference numerals in the attached figures: 1. Base; 2. Annular guide rail; 3. Telescopic positioning arm; 4. Mounting groove; 5. T-shaped slide rail; 6. T-shaped slider; 7. Rotary joint; 8. Probe mounting base; 9. Insulator positioning platform; 10. V-groove; 11. Stepped hole; 12. Probe guide sleeve; 13. Buffer spring; 14. Pressure sensor; 15. Probe body; 16. Annular limiting groove; 17. Fixing rod; 18. Angle scale line; 19. Laser calibrator; 20. Adjusting rod; 21. Fixing plate; 22. Rubber buffer layer; 23. Support threaded rod; 24. Support cylinder; 25. Internal threaded ring. Detailed Implementation
[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0017] This utility model discloses a positioning fixture for a probe used to test the insulation performance of porcelain insulators.
[0018] This utility model provides, for example Figure 1-6 The illustrated positioning fixture for testing the insulation performance of porcelain insulators includes a base 1, an annular guide rail 2, and a telescopic positioning arm 3. The top of the base 1 has a mounting groove 4, inside which the annular guide rail 2 is fixedly mounted. The inner side of the annular guide rail 2 has a T-shaped groove 5, inside which multiple T-shaped sliders 6 slide. A telescopic positioning arm 3 is fixedly mounted on one side of each of the multiple T-shaped sliders 6. A rotating joint 7 is fixedly mounted on the moving end of each of the multiple telescopic positioning arms 3. A probe mounting base 8 is fixedly mounted on the other end of each of the multiple rotating joints 7. An insulator positioning platform 9 is fixedly mounted at the bottom of the mounting groove 4. The surface of the insulator positioning platform 9 has a V-shaped groove 10 to facilitate testing of different insulators.
[0019] This utility model discloses a positioning fixture for testing the insulation performance of porcelain insulators. Each of the multiple probe mounting bases 8 has a stepped hole 11 inside. Inside each of the multiple stepped holes 11, a probe guide sleeve 12, a buffer spring 13, and a pressure sensor 14 are arranged in sequence. Each of the multiple probe guide sleeves 12 has a probe body 15 inside. This fixture can effectively control the perpendicularity deviation between the probe and the test surface, reduce contact resistance fluctuations, and reduce the repeatability error of the test data.
[0020] This utility model discloses a positioning fixture for a probe for testing the insulation performance of a porcelain insulator. The top of the annular guide rail 2 is provided with an annular limiting groove 16. The tops of the multiple T-shaped sliders 6 are all threaded with fixing rods 17. The multiple fixing rods 17 are slidably connected to the annular limiting groove 16, which facilitates the fixing and adjustment of the position of the T-shaped sliders 6.
[0021] This utility model discloses a positioning fixture for a probe to test the insulation performance of a porcelain insulator. The surface of the annular guide rail 2 is provided with angle scale lines 18, and a laser calibrator 19 is fixedly installed on the top of the multiple rotating joints 7 to improve positioning accuracy.
[0022] This utility model discloses a positioning fixture for a probe for testing the insulation performance of a porcelain insulator. The base 1 has adjusting rods 20 threadedly connected to both sides. A fixing plate 21 is fixedly installed on the opposite side of the two adjusting rods 20. A rubber buffer layer 22 is fixedly installed on the opposite side of the two fixing plates 21 to facilitate further fixing of the insulator.
[0023] This utility model discloses a positioning fixture for a probe for testing the insulation performance of a porcelain insulator. The base 1 has multiple supporting threaded rods 23 fixedly installed at its bottom. Each of the multiple supporting threaded rods 23 has a supporting cylinder 24 slidably mounted at its bottom. Each of the multiple supporting cylinders 24 has an internal threaded ring 25 rotatably mounted at its top. The multiple internal threaded rings 25 are respectively threadedly connected to the multiple supporting threaded rods 23, which facilitates the adjustment of the height of the base 1.
[0024] In use, first, based on the flatness of the ground at the testing site, rotate the internal threaded ring 25 at the top of the support cylinder 24 at the bottom of the base 1. Utilize the threaded engagement between the internal threaded ring 25 and the support threaded rod 23 to adjust the extension length of the support cylinder 24, ensuring the base 1 remains horizontal and that subsequent positioning accuracy is not affected by ground tilt. Then, place the porcelain insulator to be tested into the V-groove 10 of the insulator positioning platform 9 at the bottom of the mounting groove 4 of the base 1. The V-groove 10 can automatically center the insulator, initially limiting its radial displacement. Subsequently, rotate the adjusting rods 20 on both sides of the base 1 to push the fixing plate 21 towards the insulator until the rubber buffer layer 22 on the inner side of the fixing plate 21 is tightly attached to the outer wall of the insulator. Fix the position of the fixing plate 21 through the threaded locking function of the adjusting rods 20, completing the bidirectional clamping of the insulator and ensuring that the insulator axis is basically coincident with the center of the annular guide rail 2. Slide the T-shaped slider 6 along the T-shaped groove 5 of the annular guide rail 2. Based on the circumferential distribution requirements of the insulator testing points and the angle scale lines 18 on the surface of the annular guide rail 2, determine the T-shaped slider 6. After positioning the slider 6, tighten the fixing rod 17 at the top of the slider to lock it onto the annular guide rail 2. Then, adjust the length of the telescopic positioning arm 3 to bring the probe mounting base 8 closer to the insulator detection area. Adjust the angle of the probe mounting base 8 by rotating the joint 7, and simultaneously turn on the laser calibrator 19. Using the positioning light emitted by the laser calibrator 19, precisely align the axis of the probe body 15 with the designated detection point on the metal flange or skirt of the insulator surface to complete the probe position calibration. Slowly adjust the height of the probe mounting base 8 so that the probe body 15 passes through the probe guide sleeve 12 and contacts the insulator detection surface. The buffer spring 13 inside the probe mounting base 8 begins to compress, and the pressure sensor 14 displays the contact pressure value in real time. Fine-tuning continues until the pressure sensor 14 displays a pressure of 2-3N. At this point, the adjustment is stopped, the final positioning of the probe is completed, the insulation performance testing equipment is started, and the testing operation begins. During the testing process, the pressure sensor 14 continuously monitors the contact pressure between the probe and the testing surface. If pressure fluctuations are caused by external vibrations or slight displacement of the insulator, the testing can be paused in time, the probe position readjusted, and the entire testing process is carried out under a stable contact state to ultimately obtain accurate insulation performance test data.
[0025] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. A positioning fixture for a probe used to test the insulation performance of porcelain insulators, comprising a base (1), an annular guide rail (2), and a telescopic positioning arm (3), characterized in that, The base (1) has a mounting groove (4) at the top. An annular guide rail (2) is fixedly installed inside the mounting groove (4). A T-shaped slide groove (5) is provided on the inner side of the annular guide rail (2). Multiple T-shaped sliders (6) are slidably installed inside the T-shaped slide groove (5). A telescopic positioning arm (3) is fixedly installed on one side of each of the multiple T-shaped sliders (6). A rotary joint (7) is fixedly installed on the moving end of each of the multiple telescopic positioning arms (3). A probe mounting seat (8) is fixedly installed on the other end of each of the multiple rotary joints (7). An insulator positioning platform (9) is fixedly installed at the bottom of the mounting groove (4). A V-shaped groove (10) is provided on the surface of the insulator positioning platform (9).
2. The positioning fixture for testing the insulation performance of porcelain insulators according to claim 1, characterized in that, Each of the multiple probe mounting bases (8) has a stepped hole (11) inside. Inside each of the multiple stepped holes (11) are a probe guide sleeve (12), a buffer spring (13) and a pressure sensor (14) in sequence. Inside each of the multiple probe guide sleeves (12) is a probe body (15).
3. The positioning fixture for testing the insulation performance of porcelain insulators according to claim 1, characterized in that, The top of the annular guide rail (2) is provided with an annular limiting groove (16), and the top of each of the multiple T-shaped sliders (6) is threaded with a fixing rod (17), and the multiple fixing rods (17) are slidably connected to the annular limiting groove (16).
4. The positioning fixture for testing the insulation performance of porcelain insulators according to claim 1, characterized in that, The surface of the annular guide rail (2) is provided with angle scale lines (18), and a laser calibrator (19) is fixedly installed on the top of the multiple rotating joints (7).
5. The positioning fixture for testing the insulation performance of porcelain insulators according to claim 1, characterized in that, The base (1) has an adjusting rod (20) threadedly connected to both sides. A fixing plate (21) is fixedly installed on the opposite side of the two adjusting rods (20), and a rubber buffer layer (22) is fixedly installed on the opposite side of the two fixing plates (21).
6. The positioning fixture for testing the insulation performance of porcelain insulators according to claim 1, characterized in that, The base (1) has multiple support threaded rods (23) fixedly installed at the bottom. Each of the multiple support threaded rods (23) has a support cylinder (24) slidably provided at the bottom. Each of the multiple support cylinders (24) has an internal threaded ring (25) rotatably provided at the top. Each of the multiple internal threaded rings (25) is threadedly connected to the multiple support threaded rods (23).