Lightning arrester detection device

Abstract

The utility model provides a lightning arrester detection device which comprises a detection rod, the detection rod comprises a sliding seat and two clamping jaws, the sliding seat is provided with a first driving piece, and the first driving piece is connected with the two clamping jaws to drive the two clamping jaws to slide on the sliding seat in an opposite direction or in a separated mode; a second driving piece is arranged on the clamping jaw and used for driving the clamping jaw to stretch out and draw back. The first driving piece is arranged to drive the two clamping jaws to slide on the sliding seat in an opposite or separated mode, the distance between the two clamping jaws can be flexibly adjusted, and therefore the lightning arrester clamping device is suitable for lightning arresters of different specifications. The second driving piece is arranged on the clamping jaw to drive the clamping jaw to stretch out and draw back, and the length of the clamping jaw can be adjusted through the second driving piece, so that the contact area between the clamping jaw and the lightning arrester is larger. And an operator does not need to frequently replace detection equipment for adapting to different lightning arresters, so that the efficiency of detection work is remarkably improved.

Description

Technical Field

[0001] This application belongs to the field of surge arrester technology, specifically relating to a surge arrester testing device. Background Technology

[0002] Surge arresters are used to protect electrical equipment from high transient overvoltages caused by lightning strikes and to limit the follow current duration and amplitude. Under normal circumstances, surge arresters are in a high-resistance state, with only microampere-level leakage current flowing through them. When the voltage applied to the surge arrester reaches its operating voltage, the arrester conducts, and a large current flows through it to release the overvoltage energy, limiting the overvoltage to a certain level and protecting the equipment insulation. After releasing the overvoltage energy, the surge arrester returns to its original state.

[0003] A surge arrester testing device is used to monitor the condition of surge arresters and identify potential hazards. A surge arrester testing device typically includes clamps, which are used to secure the device to the surge arrester. However, the clamps in existing surge arrester testing devices are usually of fixed dimensions, only suitable for surge arresters of specific sizes. When measuring some special models or older surge arresters, the size mismatch causes the clamps to be unable to be securely fixed, leading to easy shaking and displacement of the testing device during testing, severely affecting the testing accuracy. Utility Model Content

[0004] Therefore, the technical problem to be solved by this application is to provide a surge arrester testing device that can be adapted to surge arresters of more sizes and expand its application range.

[0005] To address the aforementioned problems, this application provides a surge arrester testing device, including a testing rod. The testing rod includes a sliding seat and two grippers. A first driving member is provided on the sliding seat, and the first driving member is connected to the two grippers respectively to drive the two grippers to slide towards each other or away from each other on the sliding seat. A second driving member is provided on each gripper, and the second driving member is used to drive the grippers to extend or retract.

[0006] Optionally, the sliding seat includes a hollow seat body, and a bidirectional threaded rod is provided in the seat body. The bidirectional threaded rod includes a first threaded section and a second threaded section. The first threaded section and the second threaded section have opposite thread directions. One of the grippers is disposed on the first threaded section and the other gripper is disposed on the second threaded section. The first driving member is connected to the bidirectional threaded rod to drive the bidirectional threaded rod to rotate, so that the two grippers slide towards each other or slide away from each other on the sliding seat.

[0007] Optionally, both the first and second threaded segments are threadedly connected to limit sliders. A slide rod is provided in the housing, and the slide rod is arranged along the moving direction of the gripper. Both limit sliders are slidably disposed on the slide rod. One gripper is connected to the limit slider on the first threaded segment, and the other gripper is connected to the limit slider on the second threaded segment.

[0008] Optionally, a guide ridge is provided on the inner wall of the seat, the guide ridge is provided along the moving direction of the gripper, and both limiting sliders are slidably disposed on the guide ridge.

[0009] Optionally, a screw fixing member is provided on the inner wall of the seat, and the screw fixing member is provided with a through hole. The bidirectional threaded rod passes through the through hole and is rotatably connected to the through hole by a bearing. The screw fixing member is located between the first threaded section and the second threaded section.

[0010] Optionally, the gripper includes a gripper housing and a gripper slider. The gripper housing is connected to the limiting slider and is perpendicular to the base. The gripper slider is slidably disposed on the gripper housing. The second driving member is connected to the gripper housing and the gripper slider respectively, so as to drive the gripper slider to slide outward from the gripper housing in a direction away from the base, or to drive the gripper slider to slide inward from the gripper housing in a direction close to the base. A sensor is provided on the gripper slider of both grippers, and the two sensors are arranged opposite to each other. The surge arrester detection device includes a detector, and the two sensors are respectively connected to the detector.

[0011] Optionally, the inner wall of the claw housing is provided with guide ribs, and the claw slider is provided with a sliding groove. The guide ribs and the sliding groove are arranged along the sliding direction of the claw slider on the claw housing, and the sliding groove is slidably engaged with the guide ribs.

[0012] Optionally, the surge arrester detection device includes a telescopic rod, which includes a first rod body and a second rod body that are slidably connected, and a sliding seat is connected to the first rod body or the sliding seat is connected to the second rod body.

[0013] Optionally, the first rod is slidably sleeved on the outside of the second rod. The first rod has multiple fixing holes along its extension direction. The second rod has a receiving cavity, which contains an elastic sheet, a guide post, and a spring. The elastic sheet includes a first segment and a second segment arranged at an angle. One end of the guide post is slidably connected to the first segment, and the other end is connected to the second segment. The spring is sleeved on the guide post and abuts against the first segment and the second segment respectively to apply an elastic force that moves away from each other to the first segment and the second segment. The first segment has a snap-fit ​​protrusion that extends from the inside to the outside of the second rod and is selectively snapped into one of the multiple fixing holes.

[0014] Optionally, the telescopic rod is provided with a rotating connecting seat, the rotating connecting seat is provided with a rotating shaft, the sliding seat is provided with a rotating connecting block, and the rotating connecting block is rotatably connected to the rotating shaft.

[0015] Beneficial effects

[0016] The surge arrester testing device provided in this embodiment of the invention features a sliding seat that provides a mounting position for two grippers. A first driving component on the sliding seat allows the two grippers to slide towards or away from each other, enabling the testing device to flexibly adjust the distance between the grippers according to different surge arrester specifications. This allows surge arresters of different specifications to be stably fixed by adjusting the gripper spacing, expanding the applicability of the testing device. A second driving component on the grippers allows for extension and retraction. During testing, when encountering irregularly shaped surge arresters, the length of the grippers can be adjusted via the second driving component, increasing the contact area between the grippers and the surge arrester. This effectively reduces device sway and displacement during testing, providing strong support for obtaining accurate test data and significantly improving the stability and accuracy of the testing. During testing, operators no longer need to frequently change testing equipment to adapt to different surge arresters; they only need to operate the first and second driving components to quickly adjust the testing device to fit the surge arrester under test, significantly improving the efficiency of the testing work. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the detection rod according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the gripper and part of the sliding seat from one perspective of an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of the gripper and part of the sliding seat from another perspective in an embodiment of this application.

[0020] Figure 4 This is a cross-sectional view of the sliding seat according to an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the gripper structure according to an embodiment of this application.

[0022] Figure 6 This is a cross-sectional view of the telescopic rod according to an embodiment of this application;

[0023] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0024] Figure 8 This is a schematic diagram of the structure of the elastic sheet, guide post, and spring in the second rod of this application embodiment.

[0025] The reference numerals in the attached figures are as follows:

[0026] 1. Sliding seat; 11. Seat body; 12. Screw fixing component; 131. Bidirectional threaded rod; 132. Slide rod; 14. Limiting slider; 15. Guide protrusion; 16. First driving component; 2. Telescopic rod; 21. First rod body; 221. Elastic sheet; 222. Snap-fit ​​protrusion; 231. Guide post; 232. Spring; 24. Second rod body; 25. Rotary connecting block; 26. Rotary connecting seat; 3. Gripper; 31. Grip shell; 32. Second driving component; 331. Gripper slider; 332. Sensor; 341. Slide groove; 342. Guide rib. Detailed Implementation

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral 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 utility model according to the specific circumstances.

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] See also Figures 1 to 8 As shown, according to an embodiment of this application, a surge arrester testing device is provided, including a testing rod. The testing rod includes a sliding seat 1 and two grippers 3. A first driving member 16 is provided on the sliding seat 1. The first driving member 16 is connected to the two grippers 3 respectively, so as to drive the two grippers 3 to slide towards each other or slide away from each other on the sliding seat 1. A second driving member 32 is provided on the grippers 3, and the second driving member 32 is used to drive the grippers 3 to extend and retract.

[0032] By setting a sliding seat 1, a setting position is provided for the two grippers 3. A first driving component 16 is installed on the sliding seat 1, which drives the two grippers 3 to slide towards or away from each other on the sliding seat 1. This allows the testing device to flexibly adjust the distance between the two grippers 3 according to the different specifications of the surge arrester, thus enabling surge arresters of different specifications to be stably fixed by adjusting the distance between the grippers 3, expanding the applicability of the testing device. A second driving component 32 is installed on the grippers 3, which can extend and retract. During the testing process, when encountering surge arresters with irregular shapes, the length of the grippers 3 can be adjusted by the second driving component 32, increasing the contact area between the grippers 3 and the surge arrester. This effectively reduces the shaking and displacement of the device during testing, providing a strong guarantee for obtaining accurate test data and significantly improving the stability and accuracy of the test. During testing, operators no longer need to frequently change testing equipment to adapt to different surge arresters. They only need to operate the first driving component 16 and the second driving component 32 to quickly adjust the testing device to fit the surge arrester to be tested, significantly improving the efficiency of the testing work.

[0033] The detection rod is a component in the surge arrester testing device used for fixed connection with the surge arrester. During testing, the operator fixes the detection rod to the surge arrester, collects the surge arrester's parameter information through the sensor 332 on the detection rod, and transmits it to the detector of the surge arrester testing device for analysis.

[0034] The detection rod is long and narrow, making it easy for operators to hold and operate.

[0035] The first driving member 16 is connected to the two grippers 3 via a transmission mechanism, so as to drive the two grippers 3 to slide towards each other or away from each other on the sliding seat 1. That is, the first driving member 16 is indirectly connected to the two grippers 3.

[0036] The sliding seat 1 includes a hollow seat body 11, and a bidirectional threaded rod 131 is provided inside the seat body 11. The bidirectional threaded rod 131 includes a first threaded section and a second threaded section. The first threaded section and the second threaded section have opposite thread directions. One jaw 3 is provided on the first threaded section and the other jaw 3 is provided on the second threaded section. The first driving member 16 is connected to the bidirectional threaded rod 131 to drive the bidirectional threaded rod 131 to rotate, so that the two jaws 3 slide towards each other or slide away from each other on the sliding seat 1.

[0037] By setting the two grippers 3 on different threaded sections, when the first driving member 16 drives the bidirectional threaded rod 131 to rotate, the two grippers 3 will slide towards each other or away from each other on the sliding seat 1. This allows for control of the distance between the grippers 3, thus adapting to surge arresters of various sizes, ensuring a tight fit between the detection device and the surge arrester, and improving the stability and accuracy of the detection. The threaded drive has high transmission efficiency, enabling the power of the first driving member 16 to be efficiently transmitted to the grippers 3, ensuring stable operation of the device.

[0038] The first threaded segment and the second threaded segment are two segments arranged along the length of the bidirectional threaded rod 131.

[0039] The base 11 is a hollow shell structure, such as a hollow cuboid structure. The first driving member 16 can be disposed on the outer wall of the base 11 or inside the base 11.

[0040] Specifically, the length direction of the bidirectional threaded rod 131 is the same as the length direction of the base 11. The first driving member 16 drives the bidirectional threaded rod 131 to rotate, so that the two grippers 3 can slide relative to or away from each other in the length direction of the bidirectional threaded rod 131 and the length direction of the base 11.

[0041] The first driving component 16 is connected to the bidirectional threaded rod 131 via a coupling.

[0042] Limiting sliders 14 are threadedly connected to both the first and second threaded sections. A sliding rod 132 is provided inside the seat 11. The sliding rod 132 is arranged along the moving direction of the gripper 3. Both limiting sliders 14 are slidably arranged on the sliding rod 132. One gripper 3 is connected to the limiting slider 14 on the first threaded section, and the other gripper 3 is connected to the limiting slider 14 on the second threaded section.

[0043] By connecting limiting sliders 14 to both the first and second threaded sections of the bidirectional threaded rod 131, and setting the limiting sliders 14 on the slide rod 132 along the moving direction of the gripper 3, the gripper 3 is effectively guided when moving on the base 11. The slide rod 132 provides support and guidance for the limiting sliders 14, ensuring that the gripper 3 can move stably and effectively preventing the gripper 3 from deviating or wobbling during movement, thereby ensuring the stability and reliability of the detection device when adjusting the spacing of the gripper 3.

[0044] There are two slide rods 132, and both slide rods 132 are arranged parallel to the bidirectional threaded rod 131.

[0045] The two slide bars 132 are symmetrically arranged about the bidirectional threaded rod 131.

[0046] The limiting slider 14 is connected to the gripper 3 in a one-to-one correspondence, so that the bidirectional threaded rod 131 drives the limiting slider 14 to move, and in turn drives the gripper 3 to move.

[0047] The two limiting sliders 14 are symmetrically arranged about the central cross section of the bidirectional threaded rod 131.

[0048] The inner wall of the base 11 is provided with a guide protrusion 15, which is arranged along the moving direction of the gripper 3. Both limit sliders 14 are slidably arranged on the guide protrusion 15.

[0049] By providing guide ridges 15 on the inner wall of the base 11, the limiting slider 14 is guided. The limiting slider 14 slides simultaneously on the slide rod 132 and the guide ridges 15, forming a double guiding structure. This makes the movement trajectory of the grippers 3 more precise during the sliding process, further reducing the possibility of the grippers 3 deviating during movement. It can more accurately adapt to surge arresters of different specifications and ensure that the detection device is firmly fixed on the surge arrester.

[0050] By setting the guide ridge 15, the overall structural rigidity of the slide block 1 is enhanced. It not only provides guidance for the limiting slider 14, but also strengthens the internal support of the slide block 1 to a certain extent, so that the slide block 1 can better maintain its shape and structural stability when subjected to the force generated by the movement of the gripper 3 and the external forces that may occur during the detection process.

[0051] There are two guide ridges 15, and both guide ridges 15 are arranged parallel to the bidirectional threaded rod 131.

[0052] Among them, the two guide ridges 15 are symmetrically arranged about the bidirectional threaded rod 131.

[0053] The guide ridge 15 can be integrally formed on the base 11.

[0054] Specifically, a guide ridge 15 and a slide bar 132 are provided on one side of the bidirectional threaded rod 131, and another guide ridge 15 and another slide bar 132 are provided on the other side of the bidirectional threaded rod 131.

[0055] Specifically, in the guide ridge 15 and slide bar 132 located on the same side of the bidirectional threaded rod 131, the guide ridge 15 is closer to the bidirectional threaded rod 131 than the slide bar 132.

[0056] A screw fixing member 12 is provided on the inner wall of the base 11. The screw fixing member 12 is provided with a through hole. The bidirectional threaded rod 131 passes through the through hole and is rotatably connected to the through hole through a bearing. The screw fixing member 12 is located between the first threaded section and the second threaded section.

[0057] By providing a through hole in the screw fixing member 12, and allowing the bidirectional threaded rod 131 to pass through the through hole and rotate through the bearing, the frictional force during the rotation of the bidirectional threaded rod 131 is reduced, making the rotation of the bidirectional threaded rod 131 driven by the first driving member 16 smoother. Simultaneously, the screw fixing member 12 stably positions the bidirectional threaded rod 131 within the sliding seat 1, preventing axial displacement or radial wobbling during rotation. By positioning the screw fixing member 12 between the first and second threaded sections, it is positioned approximately at the center of the bidirectional threaded rod 131, providing central support. When the first driving member 16 drives the bidirectional threaded rod 131 to rotate, thereby driving the gripper 3 to move, the screw fixing member 12 effectively balances the forces on both sides of the bidirectional threaded rod 131. This prevents the bidirectional threaded rod 131 from bending or deforming due to the eccentric force generated by the movement of the gripper 3, ensuring stable rotation of the bidirectional threaded rod 131.

[0058] The screw fixing component 12 can be integrally formed on the base body 11.

[0059] The outer ring of the bearing is fixedly connected to the wall of the through hole, and the inner ring is fixedly sleeved on the outer wall of the bidirectional threaded rod 131.

[0060] In this design, the outer wall of the bidirectional threaded rod 131 where it is fitted with the bearing is a smooth circumferential surface without threads. That is, one side of the screw fixing member 12 is the first threaded section, and the other side is the second threaded section.

[0061] The gripper 3 includes a gripper housing 31 and a gripper slider 331. The gripper housing 31 is connected to the limiting slider 14 and is perpendicular to the base 11. The gripper slider 331 is slidably mounted on the gripper housing 31. The second driving member 32 is connected to both the gripper housing 31 and the gripper slider 331 to drive the gripper slider 331 to slide outward from the gripper housing 31 in a direction away from the base 11, or to drive the gripper slider 331 to slide inward from the gripper housing 31 in a direction close to the base 11. Sensors 332 are provided on the gripper sliders 331 of both grippers 3, and the two sensors 332 are arranged opposite each other. The surge arrester detection device includes a detector, and the two sensors 332 are respectively connected to the detector.

[0062] By slidably connecting the claw housing 31 to the limiting slider 14, and driving the gripper slider 331 to slide on the claw housing 31 via the second driving member 32, the detection device can flexibly adjust the position of the gripper slider 331 according to the shape and size of the surge arrester, thereby adjusting the distance between the sensor 332 mounted on the gripper slider 331 and the surge arrester. By setting corresponding sensors 332 on the gripper sliders 331 of both grippers 3 and connecting the sensors 332 to the detector, the surge arrester can be detected.

[0063] The claw housing 31 is connected to the limiting slider 14. When the sliding seat 1 adjusts the distance between the claws 3, the claw housing 31 moves accordingly. Simultaneously, the claw slider 331 can slide independently on the claw housing 31. This makes the testing device more flexible in adapting to surge arresters of different specifications. It can not only adjust the overall distance between the claws 3, but also make fine adjustments to individual claws 3, greatly improving the device's adaptability to surge arresters of various complex shapes and sizes, and broadening the application range of the testing device.

[0064] The claw shell 31 is disposed perpendicular to the outer wall of the base 11, and the sliding direction of the claw slider 331 on the claw shell 31 is towards or away from the outer wall of the base 11 where the claw shell 31 is located.

[0065] Specifically, the claw housing 31 is a hollow shell structure, with one end open away from the base 11 to form an opening for the gripper slider 331 to slide out or into the claw housing 31. The second driving member 32 can drive the gripper slider 331 to slide out of the claw housing 31 through the opening in a direction away from the base 11, thereby extending the overall length of the gripper 3. The second driving member 32 can also drive the gripper slider 331 to slide out of the claw housing 31 through the opening in a direction closer to the base 11, thereby shortening the overall length of the gripper 3. The gripper slider 331 does not detach from the claw housing 31 during sliding; that is, when the gripper slider 331 slides to its limit position in a direction away from the base 11, a portion of it remains within the claw housing 31.

[0066] The inner wall of the claw housing 31 is provided with a guide rib 342, and the claw slider 331 is provided with a sliding groove 341. The guide rib 342 and the sliding groove 341 are arranged along the sliding direction of the claw slider 331 on the claw housing 31, and the sliding groove 341 slides in cooperation with the guide rib 342.

[0067] By providing guide ribs 342 and grooves 341, the sliding of the gripper slider 331 on the gripper housing 31 is guided. When the second drive member 32 moves the gripper slider 331, the guide ribs 342 prevent the gripper slider 331 from shaking, deviating, or jamming, ensuring stable sliding along the set straight line. This makes the gripper 331 more stable when adjusting its position, thereby ensuring that the sensor 332 mounted on the gripper slider 331 can accurately reach the predetermined detection position, laying the foundation for obtaining reliable detection data.

[0068] Among them, the guide rib 342 and the slide groove 341 extend along the sliding direction of the gripper slider 331 on the gripper shell 31.

[0069] There are two guide ribs 342 and two slide grooves 341, with each guide rib 342 and slide groove 341 corresponding to the other. The slide grooves 341 are located on both sides of the gripper slider 331.

[0070] The surge arrester testing device includes a telescopic rod 2, which includes a first rod body 21 and a second rod body 24 that are slidably connected. A sliding seat 1 is connected to the first rod body 21, or the sliding seat 1 is connected to the second rod body 24.

[0071] By setting the telescopic rod 2, its length can be flexibly changed according to the installation location of the surge arrester and the site environment. By setting the sliding seat 1 to be connected to the first rod body 21 or the second rod body 24, the telescopic rod 2 can extend and retract, making it easier to adjust the sliding seat 1 to the target position.

[0072] The first rod 21 and the second rod 24 are slidably connected along the length direction to form the telescopic rod 2.

[0073] Both the first rod 21 and the second rod 24 are straight rods.

[0074] The first rod 21 is slidably sleeved on the outside of the second rod 24. The first rod 21 has multiple fixing holes along its extension direction. The second rod 24 has a receiving cavity, in which an elastic sheet 221, a guide post 231, and a spring 232 are provided. The elastic sheet 221 includes a first segment and a second segment arranged at an angle. One end of the guide post 231 is slidably connected to the first segment, and the other end is connected to the second segment. The spring 232 is sleeved on the guide post 231 and abuts against the first segment and the second segment respectively to apply an elastic force that moves away from each other to the first segment and the second segment. The first segment has a snap-fit ​​protrusion 222, which protrudes from the inside to the outside of the second rod 24 and is used to selectively snap into one of the multiple fixing holes.

[0075] By setting multiple fixing holes on the first rod body 21, the elastic plate 221 in the second rod body 24 can selectively engage the locking protrusion 222 into different fixing holes under the action of the spring 232, so that the length of the telescopic rod 2 can be precisely adjusted and reliably locked according to the actual testing requirements.

[0076] When adjusting the length of the telescopic rod 2, simply press the locking protrusion 222 to compress the spring 232, allowing the first rod body 21 and the second rod body 24 to slide relative to each other. After releasing, the locking protrusion 222 automatically engages with the corresponding fixing hole to complete the locking. The operation is simple, requires no additional tools, greatly saves preparation time before testing, and improves testing efficiency.

[0077] The combination of spring 232 and elastic plate 221 provides a stable locking force for telescopic rod 2. Spring 232 continuously applies force to elastic plate 221, causing the locking protrusion 222 to be tightly locked in the fixed hole of the plate. Even if the device is subjected to vibration or external force during the testing process, it can prevent telescopic rod 2 from extending or retracting on its own, ensuring the stability of the testing device position during the testing process and improving the overall structural stability and reliability of the testing device.

[0078] In this embodiment, the sliding seat 1 is connected to the second rod 24. Specifically, the sliding seat 1 is connected to one end of the second rod 24 that extends out of the first rod 21.

[0079] The first section has a sliding hole, and the guide post 231 passes through the sliding hole and is slidably connected to the first section. The other end of the guide post 231 is fixedly connected to the second section.

[0080] The cavity contains an elastic sheet 221 that is in a compressed state. The inner wall of the cavity presses the first and second sections together, generating elastic potential energy.

[0081] The top of the snap-fit ​​protrusion 222 is curved, which can guide it when it is disengaged from the fixing hole, making it easier to disengage from the fixing hole.

[0082] Specifically, when unlocking the first rod 21 from the second rod 24, the locking protrusion 222 is pressed into the interior of the second rod 24, causing the locking protrusion 222 to move inward against the elastic force of the elastic plate 221 and the spring 232. When the locking protrusion 222 is compressed to near disengagement from the fixing hole, the second rod 24 is pulled, causing relative displacement between the first rod 21 and the second rod 24. The arc surface at the top of the locking protrusion 222 completely disengages it from the fixing hole. When the relative displacement between the first rod 21 and the second rod 24 reaches the required length, the locking protrusion 222 enters the nearest fixing hole, completing the locking between the first rod 21 and the second rod 24.

[0083] The snap-fit ​​protrusion 222 and the elastic sheet 221 are an integral structure.

[0084] The telescopic rod 2 is provided with a rotating connecting seat 26, and the rotating connecting seat 26 is provided with a rotating shaft. The sliding seat 1 is provided with a rotating connecting block 25, and the rotating connecting block 25 is rotatably connected to the rotating shaft.

[0085] By setting up the rotating connecting seat 26 and the rotating connecting block 25, the operator can flexibly adjust the angle of the sliding seat 1 according to the shape, position and testing requirements of the surge arrester when testing it.

[0086] The rotating shaft serves as the rotation center axis of the rotating connecting block 25.

[0087] The rotating connecting seat 26 is roughly U-shaped, with the rotating shaft located at the opening of the U-shape and connected to both ends of the U-shape. The rotating connecting block 25 has a through-hole and is rotatably connected to the rotating shaft through the through-hole.

[0088] The rotating connecting seat 26 abuts against the rotating connecting block 25, thereby fixing the rotating connecting seat 26 and the rotating connecting block 25 at the required angle through the friction between the contact surfaces.

[0089] Specifically, when it is necessary to adjust the angle of the sliding seat 1, the operator applies external force to overcome the static friction between the rotating connecting seat 26 and the rotating connecting block 25, causing the rotating connecting block 25 to rotate around the axis. When the sliding seat 1 rotates to the required angle, the external force is removed. At this time, the static friction comes into play again, preventing the rotating connecting block 25 from continuing to rotate on the axis, thereby fixing the sliding seat 1 at that angle.

[0090] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0091] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A surge arrester testing device, characterized in that, The device includes a detection rod, which includes a sliding seat (1) and two grippers (3). A first driving member (16) is provided on the sliding seat (1), and the first driving member (16) is connected to the two grippers (3) respectively, so as to drive the two grippers (3) to slide towards each other or slide away from each other on the sliding seat (1). A second driving member (32) is provided on the grippers (3), and the second driving member (32) is used to drive the grippers (3) to extend and retract.

2. The surge arrester testing device according to claim 1, characterized in that, The sliding seat (1) includes a hollow seat body (11), and a bidirectional threaded rod (131) is provided inside the seat body (11). The bidirectional threaded rod (131) includes a first threaded section and a second threaded section. The first threaded section and the second threaded section have opposite thread directions. One of the grippers (3) is disposed on the first threaded section, and the other gripper (3) is disposed on the second threaded section. The first driving member (16) is connected to the bidirectional threaded rod (131) to drive the bidirectional threaded rod (131) to rotate, so that the two grippers (3) slide towards each other or slide away from each other on the sliding seat (1).

3. The surge arrester testing device according to claim 2, characterized in that, Both the first and second threaded sections are threadedly connected to limit sliders (14). A slide rod (132) is provided inside the seat (11). The slide rod (132) is arranged along the moving direction of the gripper (3). Both limit sliders (14) are slidably arranged on the slide rod (132). One of the grippers (3) is connected to the limit slider (14) on the first threaded section, and the other gripper (3) is connected to the limit slider (14) on the second threaded section.

4. The surge arrester testing device according to claim 3, characterized in that, The inner wall of the seat (11) is provided with a guide ridge (15), which is arranged along the moving direction of the gripper (3). Both limiting sliders (14) are slidably arranged on the guide ridge (15).

5. The surge arrester testing device according to claim 2, characterized in that, A screw fixing member (12) is provided on the inner wall of the seat (11). The screw fixing member (12) is provided with a through hole. The bidirectional threaded rod (131) passes through the through hole and is rotatably connected to the through hole by a bearing. The screw fixing member (12) is disposed between the first threaded section and the second threaded section.

6. The surge arrester testing device according to claim 3, characterized in that, The gripper (3) includes a gripper shell (31) and a gripper slider (331). The gripper shell (31) is connected to the limiting slider (14). The gripper shell (31) is set perpendicular to the base (11). The gripper slider (331) is slidably disposed on the gripper shell (31). The second driving member (32) is connected to the gripper shell (31) and the gripper slider (331) respectively, so as to drive the gripper slider (331) to slide outward of the gripper shell (31) in a direction away from the base (11), or drive the gripper slider (331) to slide inward of the gripper shell (31) in a direction close to the base (11). Sensors (332) are provided on the gripper sliders (331) of the two grippers (3), and the two sensors (332) are arranged opposite to each other. The surge arrester detection device includes a detector, and the two sensors (332) are respectively connected to the detector.

7. The surge arrester testing device according to claim 6, characterized in that, The inner wall of the claw housing (31) is provided with a guide rib (342), and the claw slider (331) is provided with a sliding groove (341). The guide rib (342) and the sliding groove (341) are arranged along the sliding direction of the claw slider (331) on the claw housing (31), and the sliding groove (341) slides in cooperation with the guide rib (342).

8. The surge arrester testing device according to claim 1, characterized in that, The surge arrester detection device includes a telescopic rod (2), which includes a first rod body (21) and a second rod body (24) that are slidably connected. The sliding seat (1) is connected to the first rod body (21), or the sliding seat (1) is connected to the second rod body (24).

9. The surge arrester testing device according to claim 8, characterized in that, The first rod (21) is slidably sleeved on the outside of the second rod (24). The first rod (21) has a plurality of fixing holes along the extension direction. The second rod (24) has a receiving cavity. The receiving cavity is provided with an elastic sheet (221), a guide post (231) and a spring (232). The elastic sheet (221) includes a first segment and a second segment arranged at an angle. One end of the guide post (231) is slidably connected to the first segment and the other end is connected to the second segment. The spring (232) is sleeved on the guide post (231). The spring (232) abuts against the first segment and the second segment respectively to apply an elastic force that moves away from each other to the first segment and the second segment. The first segment is provided with a snap-fit ​​protrusion (222). The snap-fit ​​protrusion (222) extends out of the second rod (24) from the inside to the outside. The snap-fit ​​protrusion (222) is used to selectively snap into one of the plurality of fixing holes.

10. The surge arrester testing device according to claim 8, characterized in that, The telescopic rod (2) is provided with a rotating connecting seat (26), the rotating connecting seat (26) is provided with a rotating shaft, the sliding seat (1) is provided with a rotating connecting block (25), and the rotating connecting block (25) is rotatably connected to the rotating shaft.

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