Portable lightning arrester insulation resistance on-site testing device and testing method

Abstract

This invention provides a portable on-site testing device for the insulation resistance of surge arresters, comprising: a clamping rod and a measuring component. The clamping rod includes a positive conductive clamping component, a negative conductive clamping component, and an insulating base rod. The positive and negative conductive clamping components are mounted on the insulating base rod and can slide on it. The positive and negative conductive clamping components are used to clamp the two ends of the surge arrester, respectively. The measuring component includes a positive clamping conductive connector and a negative clamping conductive connector. The positive clamping conductive connector is mounted on the positive conductive clamping component, and the negative clamping conductive connector is mounted on the negative conductive clamping component. The positive clamping conductive connector is connected to a measuring line, and the negative clamping conductive connector is connected to a first grounding wire. This invention avoids the cumbersome steps of disassembling the surge arrester after power outages, improving testing efficiency and safety.

Description

Technical Field

[0001] This invention relates to the field of power grid equipment technology, specifically to a portable local testing device and method for the insulation resistance of surge arresters. Background Technology

[0002] In modern power systems, surge arresters are crucial for grid safety.

[0003] The current traditional testing method involves manually removing the surge arresters after a power outage, transporting them to a professional testing site, and using ordinary resistance test leads to connect an insulation resistance meter to the high-voltage and low-voltage ends of the surge arresters to test their insulation resistance. This method suffers from problems such as low efficiency in removing surge arresters, long interference with power grid operation time, limited data, and insufficient accuracy. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a portable on-site testing device for the insulation resistance of surge arresters, comprising:

[0005] The clamping rod includes a positive conductive clamping component, a negative conductive clamping component, and an insulating base rod. The positive and negative conductive clamping components are disposed on the insulating base rod and can slide on the insulating base rod. The positive and negative conductive clamping components are used to clamp the two ends of the surge arrester respectively.

[0006] The measuring device includes a positive electrode clamp conductive connector and a negative electrode clamp conductive connector. The positive electrode clamp conductive connector is mounted on the positive electrode conductive holder, and the negative electrode clamp conductive connector is mounted on the negative electrode conductive holder. The positive electrode clamp conductive connector is connected to a measuring line, and the negative electrode clamp conductive connector is connected to a first grounding wire. The measuring line is used to connect to the high-voltage terminal of the insulation resistance measuring device, and the first grounding wire is connected to the grounding terminal of the insulation resistance measuring device.

[0007] Furthermore, it also includes: a tubular handle, a first rope, and a rotating connection, the rotating connection rotatably connecting the front end of the tubular handle and the clamping rod;

[0008] The rotating connection includes a handle connecting seat, a clamping rod connecting seat, a bearing seat, a bearing, and a rotating shaft. The handle connecting seat is fixed to the front end of the tubular handle. The handle connecting seat has a groove, and the bottom of the handle connecting seat below the groove has a first hole communicating with the groove. The bearing seat is fixed in the groove, and the bearing is installed in the bearing seat. The bearing seat has a second hole in the middle. The top end of the rotating shaft passes through the first hole, the second hole, and the inner ring of the bearing in sequence and is fixed to the bottom surface of the clamping rod connecting seat. The rotating shaft is connected to the bearing seat through the bearing. The top surface of the clamping rod connecting seat is fixed to the insulating base rod.

[0009] A rotating disc is fixed at the bottom of the rotating shaft. One end of the first rope passes through the front end of the tubular handle and is fixedly connected to the rotating disc at the bottom of the rotating shaft. The other end of the first rope passes through the rear end of the tubular handle and is fixed to the rotating handle. The rotating handle is sleeved on the rear end of the tubular handle and can rotate on the tubular handle. The rotation position of the rotating shaft is adjusted by rotating the first rope through the rotating handle.

[0010] Furthermore, the clamping rod also includes: a first slide tube and a second slide tube. Multiple fixing seats are provided on the insulating base rod along the length direction of the insulating base rod. The two ends of the first slide tube are respectively installed on two corresponding fixing seats, and the two ends of the second slide tube are respectively installed on two corresponding fixing seats. The positive electrode conductive clamping member is slidably installed on the first slide tube, and the negative electrode conductive clamping member is slidably installed on the second slide tube.

[0011] Furthermore, the positive electrode conductive clamping member includes a positive electrode U-shaped buckle, a first fixing buckle, and a first slide block. The first fixing buckle is slidably mounted on the first slide tube, the positive electrode U-shaped buckle is fixedly connected to the first fixing buckle, the bottom end of the first fixing buckle is fixedly connected to the first slide block, and the first slide block is slidably connected to the insulating base rod. The first fixing buckle and the first slide block together limit the positive electrode conductive clamping member to slide along the length direction of the insulating base rod.

[0012] The negative electrode conductive clamping component includes a negative electrode U-shaped buckle, a second fixing buckle, and a second slide block. The second fixing buckle is slidably mounted on the second slide tube, and the negative electrode U-shaped buckle is fixedly connected to the second fixing buckle. The bottom end of the second fixing buckle is fixedly connected to the second slide block, and the second slide block is slidably connected to the insulating base rod. The second fixing buckle and the second slide block together limit the negative electrode conductive clamping component to slide along the length direction of the insulating base rod.

[0013] Furthermore, it also includes: a second rope, a first rope hole is provided on the insulating base rod, a first long slit is provided on the first sliding tube along the length of the first sliding tube, one end of the second rope passes through the first rope hole and then through the first sliding tube and extends out from the first long slit and is fixed to the first fixing buckle;

[0014] A first spring is fitted onto the first slide tube, and the first spring is located between the first fixing buckle and the fixing seat on the first slide tube near the first rope hole.

[0015] Furthermore, it also includes: a third rope, a second rope hole is opened on the insulating base rod, a second long slit is opened on the second slide tube along the length direction of the second slide tube, one end of the third rope passes through the second rope hole and then through the second slide tube and extends out from the second long slit and is fixed to the second fixing buckle, and the distance between the positive electrode conductive clamp and the negative electrode conductive clamp is adjusted by pulling the other ends of the second rope and the third rope respectively to drive the positive electrode conductive clamp and the negative electrode conductive clamp to slide.

[0016] A second spring is fitted onto the second slide tube, and the second spring is located between the second fixing buckle and the fixing seat on the second slide tube near the second rope hole.

[0017] Furthermore, the positive U-shaped buckle also includes two opposing first spring pieces, and the positive clamp conductive connector is simultaneously connected to the two opposing first spring pieces;

[0018] The negative electrode U-shaped buckle also includes two opposing second spring pieces, and the negative electrode clamp conductive connector is simultaneously connected to the two opposing second spring pieces.

[0019] Furthermore, it also includes: a shielding cover, which is fixedly connected to the insulating base rod, and the shielding cover completely or partially covers the surge arrester; the shielding cover further includes:

[0020] A first base and a second base, the first base having a first sector-shaped slide rail and the second base having a second sector-shaped slide rail, the first base and the second base being respectively fixed to both ends of the insulating base rod;

[0021] The umbrella ribs are slidably mounted at both ends on the first sector slide rail and the second sector slide rail, respectively.

[0022] A shielding net, which is installed on several umbrella ribs;

[0023] The second grounding wire is connected to the shielding mesh.

[0024] Furthermore, the inner layer of the measuring line is a conductor, and the outer layer of the measuring line is a shielding wire that wraps around the conductor. One end of the shielding wire is connected to the shielding end of the insulation resistance measuring device.

[0025] A test method based on a portable surge arrester insulation resistance local testing device includes the following steps:

[0026] Connect the measuring wire to the high-voltage terminal of the insulation resistance measuring device, and connect the first grounding wire to the grounding terminal of the insulation resistance measuring device;

[0027] According to the position of the surge arrester, rotate the rotary handle to drive the first rope to rotate, thereby adjusting the rotation position of the shaft. The shaft drives the clamping rod connecting seat to rotate, and the clamping rod connecting seat then drives the insulating base rod to rotate. By rotating the insulating base rod, adjust the rotation position of the positive and negative conductive clamping parts until they are aligned with the surge arrester. According to the distance between the high-voltage and low-voltage ends of the surge arrester, pull the second and third ropes respectively to drive the positive and negative conductive clamping parts to slide on the insulating base rod, thereby adjusting the distance between the positive and negative conductive clamping parts until it matches the distance between the two ends of the surge arrester. Clamp the positive conductive clamping part to the high-voltage end of the surge arrester and clamp the negative conductive clamping part to the low-voltage end of the surge arrester.

[0028] The insulation resistance measuring device supplies power to the surge arrester through the measuring line. The surge arrester is connected to the grounding terminal of the insulation resistance measuring device through the first grounding wire to form a circuit. The insulation resistance measuring device measures the voltage and current of the circuit and calculates the resistance of the surge arrester based on the voltage and current.

[0029] The beneficial effects of this invention are as follows:

[0030] 1. This invention provides a portable device for testing the performance of surge arresters without needing to approach or disassemble them, avoiding the cumbersome steps of power outage and disassembly required in traditional methods, and greatly improving testing efficiency and safety.

[0031] 2. The first and second springs use their own restoring force to press against the surge arrester, while increasing the contact area with the surge arrester terminals and eliminating contact resistance errors.

[0032] 3. The induced current is then diverted to the ground via a grounding wire through a shielding wire and shielding cover, thereby protecting the signals inside the cable from interference.

[0033] 4. The angle of the clamping rod can be easily adjusted by the cooperation of the first rope and the rotating connection part. At the same time, the distance between the positive electrode clamping part and the negative electrode clamping part can be adjusted to meet the application requirements of different application scenarios. Attached Figure Description

[0034] Figure 1 A schematic diagram of a portable local testing device for the insulation resistance of surge arresters;

[0035] Figure 2 A schematic diagram of the rotating connection part of a portable surge arrester insulation resistance local testing device;

[0036] Figure 3 A schematic diagram of the positive conductive clamping component of a portable surge arrester insulation resistance local testing device.

[0037] Figure 4 A schematic cross-sectional view of the positive conductive clamp of a portable surge arrester insulation resistance local testing device.

[0038] Figure 5 A schematic diagram of the negative electrode conductive clamping component of a portable surge arrester insulation resistance local testing device.

[0039] Figure 6 A schematic diagram of the shielding cover for a portable surge arrester insulation resistance local testing device.

[0040] Reference numerals: 1-Handle; 2-First rope; 21-Fiber bundle; 3-Rotating connection; 31-Handle connecting seat; 4-Clamping rod; 41-Positive conductive clamping component; 411-Positive U-shaped buckle; 4111-First spring; 412-First fixing buckle; 413-First slide; 42-Negative conductive clamping component; 421-Negative U-shaped buckle; 4211-Second spring; 422-Second fixing buckle; 423-Second slide; 43-Insulating base rod; 431-Fixing seat; 432-First rope hole; 433-Second rope hole; 44-First slide tube; 441-First long slit; 45-Second slide tube; 451-Second long slit; 46-First spring; 47-Second spring; 5-Measuring component; 51-Positive electrode clamp conductive connector; 52-Negative electrode clamp conductive connector; 53-Measuring wire; 54-First grounding wire; 6-Shielding cover; 61-First base; 611-First sector slide rail; 62-Second base; 621-Second sector slide rail; 63-Umbrella rib; 64-Shielding net; 65-Second grounding wire; 7-Rotating handle; 8-Second rope; 9-Third rope. Detailed Implementation

[0041] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0042] Example 1

[0043] refer to Figure 1-6 A portable on-site testing device for the insulation resistance of surge arresters, comprising:

[0044] The tubular handle 1, the first rope 2, and the rotating connection part 3 rotatably connect the front end of the tubular handle 1 and the clamping rod 4.

[0045] The rotating connection part 3 includes a handle connecting seat 31, a clamping rod connecting seat 32, a bearing seat 33, a bearing 34, and a rotating shaft 36. The handle connecting seat 31 is fixed to the front end of the tubular handle 1. The handle connecting seat 31 has a groove 311, and the bottom of the handle connecting seat 31 below the groove 311 has a first hole 3111 communicating with the groove 311. The bearing seat 33 is fixed in the groove 311. The bearing 34 is installed on the bearing seat 33, and the outer ring of the bearing 34 is connected to the bearing seat 33 by a key. The bearing seat 33 has a second hole 331 in the middle. The top end of the rotating shaft 36 passes through the first hole 3111, the second hole 331, and the shaft hole of the inner ring of the bearing 34 in sequence and is fixed to the bottom surface of the clamping rod connecting seat 32. The outer wall of the rotating shaft 36 is connected to the inner ring of the bearing 34 by a key. The top surface of the clamping rod connecting seat 32 is fixed to the insulating base rod 43.

[0046] A rotating disc 361 is fixed to the bottom end of the rotating shaft 36. One end of the first rope 2 passes through the front end of the tubular handle 1 and is fixedly connected to the rotating disc 361 at the bottom end of the rotating shaft 36. The other end of the first rope 2 passes through the rear end of the tubular handle 1 and is fixed to the rotating handle 7. The rotating handle 7 is sleeved on the rear end of the tubular handle 1 and can rotate on the tubular handle 1. The first rope 2 is rotated by rotating the handle 7, thereby adjusting the rotation position of the rotating shaft 36, and thus rotating the clamping rod 4.

[0047] The clamping rod 4 and measuring component 5 are provided. The clamping rod 4 includes a positive conductive clamping component 41, a negative conductive clamping component 42, and an insulating base rod 43. The positive conductive clamping component 41 and the negative conductive clamping component 42 are disposed on the insulating base rod 43 and can slide on the insulating base rod 43. The positive conductive clamping component 41 and the negative conductive clamping component 42 are used to clamp the two ends of the surge arrester respectively. The clamping rod 4 also includes a first sliding tube 44 and a second sliding tube 45. The insulating base rod 43 is provided with a plurality of fixed seats 431 along the length direction of the insulating base rod 43. The two ends of the first sliding tube 44 are respectively installed on two corresponding fixed seats 431, and the two ends of the second sliding tube 45 are respectively installed on two corresponding fixed seats 431. The positive conductive clamping component 41 is slidably installed on the first sliding tube 44, and the negative conductive clamping component 42 is slidably installed on the second sliding tube 45. The positive electrode conductive clamping member 41 includes a positive electrode U-shaped buckle 411, a first fixing buckle 412, and a first slide block 413. The first fixing buckle 412 is slidably mounted on the first slide tube 44. The positive electrode U-shaped buckle 411 is fixedly connected to the first fixing buckle 412. The bottom end of the first fixing buckle 412 is fixedly connected to the first slide block 413. The first slide block 413 is slidably connected to the insulating base rod 43. The first fixing buckle 412 and the first slide block 413 together limit the positive electrode conductive clamping member 41 to slide along the length direction of the insulating base rod 43. The negative electrode conductive clamping member 42 includes a negative electrode U-shaped buckle 421, a second fixing buckle 422, and a second slide block 423. The second fixing buckle 422 is slidably mounted on the second slide tube 45. The negative electrode U-shaped buckle 421 is fixedly connected to the second fixing buckle 422. The bottom end of the second fixing buckle 422 is fixedly connected to the second slide block 423. The second slide block 423 is slidably connected to the insulating base rod 43. The second fixing buckle 422 and the second slide block 423 together limit the negative electrode conductive clamping member 42 to slide along the length direction of the insulating base rod 43. An insulating base rod 43 has a first rope hole 432, and a first long slit 441 is formed along the length of the first slide tube 44. One end of the second rope 8 passes through the first rope hole 432 and then through the first slide tube 44, and extends out from the first long slit 441 and is fixed to the first fixing buckle 412. A first spring 46 is fitted on the first slide tube 44. The first spring 46 is located between the first fixing buckle 412 and the fixing seat 431 on the first slide tube 44 near the first rope hole 432.The insulating base rod 43 has a second rope hole 433, and the second slide tube 45 has a second long slit 451 along its length. One end of the third rope 9 passes through the second rope hole 433 and then through the second slide tube 45, and extends out from the second long slit 451 and is fixed to the second fixing buckle 422. By pulling the other ends of the second rope 8 and the third rope 9 respectively, the positive conductive clamp 41 and the negative conductive clamp 42 are slid, thereby adjusting the distance between the positive conductive clamp 41 and the negative conductive clamp 42. The second slide tube 45 is fitted with a second spring 47, which is located between the second fixing buckle 422 and the fixing seat 431 on the second slide tube 45 near the second rope hole 433. The positive U-shaped buckle 411 also includes two opposing first spring pieces 4111. The positive clamp conductive connector 51 is connected to the two opposing first spring pieces 4111. The negative U-shaped buckle 421 also includes two opposing second spring pieces 4211. The negative clamp conductive connector 52 is connected to the two opposing second spring pieces 4211. The first spring pieces 4111 and the second spring pieces 4211 use their own restoring force to press against the two ends of the surge arrester, thereby increasing the contact area with the end of the surge arrester and eliminating contact resistance error.

[0048] The measuring component 5 includes a positive electrode clamp conductive connector 51 and a negative electrode clamp conductive connector 52. The positive electrode clamp conductive connector 51 is mounted on the positive electrode conductive clamp 41, and the negative electrode clamp conductive connector 52 is mounted on the negative electrode conductive clamp 42. The positive electrode clamp conductive connector 51 is connected to a measuring line 53, and the negative electrode clamp conductive connector 52 is connected to a first grounding line 54. The measuring line 53 is used to connect to the high-voltage terminal of the insulation resistance measuring device, and the first grounding line 54 is connected to the grounding terminal of the insulation resistance measuring device.

[0049] The inner layer of the measuring line 53 is a conductor, and the outer layer of the measuring line is a shielding wire that wraps the conductor. The shielding wire is a copper mesh braided wire, and one end of the shielding wire is connected to the shielding end of the insulation resistance measuring device.

[0050] The shielding cover 6 is fixedly connected to the insulating base rod 43, and the shielding cover 6 completely or partially covers the surge arrester. The first base 61 has a first sector-shaped slide rail 611, and the second base 62 has a second sector-shaped slide rail 621. The first base 61 and the second base 62 are respectively fixed to both ends of the insulating base rod 43. The two ends of several umbrella ribs 63 are respectively installed on the first sector-shaped slide rail 611 and the second sector-shaped slide rail 621, thereby adjusting the opening and closing angle of the shielding mesh 64. The shielding mesh 64 is made of aluminum mesh and is installed on several umbrella ribs 63. The second grounding wire 65 is connected to the shielding mesh 64. According to Faraday's law of electromagnetic induction, electromagnetic waves will generate induced current on the surface of the shielding layer. These induced currents protect the signals inside the cable from interference through the grounding wire.

[0051] Example 2

[0052] A test method based on a portable surge arrester insulation resistance local testing device includes the following steps:

[0053] Connect the measuring line 53 to the high-voltage terminal of the insulation resistance measuring device, and connect the first grounding line 54 to the grounding terminal of the insulation resistance measuring device;

[0054] According to the position of the surge arrester, rotating the handle 7 drives the first rope 2 to rotate, thereby adjusting the rotation position of the shaft 36. The shaft 36 drives the clamping rod connecting seat 32 to rotate, and the clamping rod connecting seat 32 then drives the insulating base rod 43 to rotate. By rotating the insulating base rod 43, the rotation positions of the positive conductive clamping member 41 and the negative conductive clamping member 42 are adjusted until they are aligned with the surge arrester. According to the distance between the high-voltage end and the low-voltage end of the surge arrester, the second rope 8 and the third rope 9 are pulled respectively to drive the positive conductive clamping member 41 and the negative conductive clamping member 42 to slide on the insulating base rod 43, thereby adjusting the distance between the positive conductive clamping member 41 and the negative conductive clamping member 42 until it matches the distance between the two ends of the surge arrester. The positive conductive clamping member 41 clamps the high-voltage end of the surge arrester, and the negative conductive clamping member 42 clamps the low-voltage end of the surge arrester. Specifically, the first spring piece 4111 and the second spring piece 4211 use their own restoring force to press against the two ends of the surge arrester.

[0055] The insulation resistance measuring device supplies power to the surge arrester through the measuring line 53. The surge arrester is connected to the grounding terminal of the insulation resistance measuring device through the first grounding line 54 to form a circuit. The insulation resistance measuring device measures the voltage and current of the circuit and calculates the resistance of the surge arrester based on the voltage and current.

[0056] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A portable local testing device for the insulation resistance of a surge arrester, characterized in that, include: The tubular handle (1), the first rope (2), and the rotating connection (3) rotatably connect the front end of the tubular handle (1) and the clamping rod (4); The rotating connection part (3) includes a handle connecting seat (31), a clamping rod connecting seat (32), a bearing seat (33), a bearing (34), and a rotating shaft (36). The handle connecting seat (31) is fixed to the front end of the tubular handle (1). The handle connecting seat (31) has a groove (311), and the bottom of the handle connecting seat (31) below the groove (311) has a first hole (3111) communicating with the groove (311). The bearing seat (33) is fixed to the handle connecting seat (34). In the groove (311), the bearing (34) is installed in the bearing seat (33). The bearing seat (33) has a second hole (331) in the middle. The top end of the rotating shaft (36) passes through the first hole (3111), the second hole (331) and the inner ring of the bearing (34) in sequence and is fixed to the bottom surface of the clamping rod connecting seat (32). The rotating shaft (36) is connected to the bearing seat (33) through the bearing (34). The top surface of the clamping rod connecting seat (32) is fixed to the insulating base rod (43). A rotating disc (361) is fixed at the bottom of the rotating shaft (36). One end of the first rope (2) passes through the front end of the tubular handle (1) and is fixedly connected to the rotating disc (361) at the bottom of the rotating shaft (36). The other end of the first rope (2) passes through the rear end of the tubular handle (1) and is fixed on the rotating handle (7). The rotating handle (7) is sleeved on the rear end of the tubular handle (1) and can rotate on the tubular handle (1). The first rope (2) is rotated by rotating the handle (7) to adjust the rotation position of the rotating shaft (36). The clamping rod (4) and measuring component (5) are provided. The clamping rod (4) includes a positive conductive clamping component (41), a negative conductive clamping component (42), and an insulating base rod (43). The positive conductive clamping component (41) and the negative conductive clamping component (42) are disposed on the insulating base rod (43) and can slide on the insulating base rod (43). The positive conductive clamping component (41) and the negative conductive clamping component (42) are used to clamp the two ends of the surge arrester respectively. The measuring component (5) includes a positive electrode clamp conductive connector (51) and a negative electrode clamp conductive connector (52). The positive electrode clamp conductive connector (51) is mounted on the positive electrode conductive clamp (41), and the negative electrode clamp conductive connector (52) is mounted on the negative electrode conductive clamp (42). The positive electrode clamp conductive connector (51) is connected to a measuring line (53), and the negative electrode clamp conductive connector (52) is connected to a first grounding wire (54). The measuring line (53) is used to connect to the high voltage terminal of the insulation resistance measuring device, and the first grounding wire (54) is connected to the grounding terminal of the insulation resistance measuring device.

2. The portable surge arrester insulation resistance local testing device according to claim 1, characterized in that, The clamping rod (4) also includes: The first slide tube (44) and the second slide tube (45) are provided with multiple fixing seats (431) along the length of the insulating base rod (43). The two ends of the first slide tube (44) are respectively installed on the two corresponding fixing seats (431), and the two ends of the second slide tube (45) are respectively installed on the two corresponding fixing seats (431). The positive electrode conductive clamp (41) is slidably installed on the first slide tube (44), and the negative electrode conductive clamp (42) is slidably installed on the second slide tube (45).

3. The portable surge arrester insulation resistance local testing device according to claim 2, characterized in that: The positive electrode conductive clamp (41) includes a positive electrode U-shaped buckle (411), a first fixing buckle (412) and a first slide block (413). The first fixing buckle (412) is slidably mounted on the first slide tube (44). The positive electrode U-shaped buckle (411) is fixedly connected to the first fixing buckle (412). The bottom end of the first fixing buckle (412) is fixedly connected to the first slide block (413). The first slide block (413) is slidably connected to the insulating base rod (43). The first fixing buckle (412) and the first slide block (413) together limit the positive electrode conductive clamp (41) to slide in the length direction of the insulating base rod (43). The negative electrode conductive clamp (42) includes a negative electrode U-shaped buckle (421), a second fixing buckle (422), and a second slide block (423). The second fixing buckle (422) is slidably mounted on the second slide tube (45). The negative electrode U-shaped buckle (421) is fixedly connected to the second fixing buckle (422). The bottom end of the second fixing buckle (422) is fixedly connected to the second slide block (423). The second slide block (423) is slidably connected to the insulating base rod (43). The second fixing buckle (422) and the second slide block (423) together limit the negative electrode conductive clamp (42) to slide along the length direction of the insulating base rod (43).

4. The portable surge arrester insulation resistance local testing device according to claim 3, characterized in that, Also includes: The second rope (8) has a first rope hole (432) on the insulating base rod (43), and a first long slit (441) is opened on the first slide tube (44) along the length direction of the first slide tube (44). One end of the second rope (8) passes through the first rope hole (432) and then through the first slide tube (44), and extends out from the first long slit (441) and is fixed to the first fixing buckle (412). A first spring (46) is fitted on the first slide tube (44), and the first spring (46) is located between the first fixing buckle (412) and the fixing seat (431) on the first slide tube (44) near the first rope hole (432).

5. The portable surge arrester insulation resistance local testing device according to claim 4, characterized in that, Also includes: The third rope (9) has a second rope hole (433) on the insulating base rod (43), and a second long slit (451) is opened along the length direction of the second slide tube (45) on the second slide tube (45). One end of the third rope (9) passes through the second rope hole (433) and then through the second slide tube (45), and extends out from the second long slit (451) and is fixed to the second fixing buckle (422). By pulling the other ends of the second rope (8) and the third rope (9) respectively, the positive electrode conductive clamp (41) and the negative electrode conductive clamp (42) slide, thereby adjusting the distance between the positive electrode conductive clamp (41) and the negative electrode conductive clamp (42). The second slide tube (45) is fitted with a second spring (47), which is located between the second fixing buckle (422) and the fixing seat (431) on the second slide tube (45) near the second rope hole (433).

6. The portable surge arrester insulation resistance local testing device according to claim 5, characterized in that: The positive U-shaped buckle (411) also includes two opposing first spring pieces (4111), and the positive clamp conductive connector (51) is connected to the two opposing first spring pieces (4111) at the same time. The negative U-shaped buckle (421) also includes two opposing second spring pieces (4211), and the negative clamp conductive connector (52) is simultaneously connected to the two opposing second spring pieces (4211).

7. The portable surge arrester insulation resistance local testing device according to claim 1, characterized in that, Also includes: A shielding cover (6) is fixedly connected to the insulating base rod (43). The shielding cover (6) covers all or part of the surge arrester. The shielding cover (6) also includes: A first base (61) and a second base (62), the first base (61) having a first sector slide rail (611) and the second base (62) having a second sector slide rail (621), the first base (61) and the second base (62) being respectively fixed to both ends of the insulating base rod (43); The umbrella ribs (63) are slidably mounted on the first sector slide rail (611) and the second sector slide rail (621) at both ends. A shielding net (64) is installed on several umbrella ribs (63); The second grounding wire (65) is connected to the shielding mesh (64).

8. The portable surge arrester insulation resistance local testing device according to claim 1, characterized in that: The inner layer of the measuring line (53) is a conductor, and the outer layer of the measuring line is a shielding wire that wraps the conductor. One end of the shielding wire is connected to the shielding end of the insulation resistance measuring device.

9. A test method based on the portable surge arrester insulation resistance local test device according to claim 6, characterized in that, Includes the following steps: Connect the measuring line (53) to the high-voltage terminal of the insulation resistance measuring device, and connect the first grounding line (54) to the grounding terminal of the insulation resistance measuring device; According to the position of the surge arrester, rotate the rotating handle (7) to drive the first rope (2) to rotate, thereby adjusting the rotation position of the rotating shaft (36). The rotating shaft (36) drives the clamping rod connecting seat (32) to rotate, and the clamping rod connecting seat (32) then drives the insulating base rod (43) to rotate. By rotating the insulating base rod (43), the rotation positions of the positive conductive clamping piece (41) and the negative conductive clamping piece (42) are adjusted until they are aligned with the surge arrester. According to the distance between the high voltage end and the low voltage end of the surge arrester, by pulling the second rope (8) and the third rope (9) respectively, the positive conductive clamping piece (41) and the negative conductive clamping piece (42) slide on the insulating base rod (43), thereby adjusting the distance between the positive conductive clamping piece (41) and the negative conductive clamping piece (42) until they match the distance between the two ends of the surge arrester. The positive conductive clamping piece (41) clamps the high voltage end of the surge arrester, and the negative conductive clamping piece (42) clamps the low voltage end of the surge arrester. The insulation resistance measuring device supplies power to the surge arrester through the measuring line (53). The surge arrester is connected to the grounding terminal of the insulation resistance measuring device through the first grounding line (54) to form a circuit. The insulation resistance measuring device measures the voltage and current of the circuit and calculates the resistance of the surge arrester based on the voltage and current.

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