A loop resistance testing device for high-voltage disconnectors

Abstract

The application relates to the technical field of resistance testing, in particular to a loop resistance testing device of a high-voltage disconnecting switch, which comprises a loop resistance testing device main body and a fixed frame. When a first contact ball rotates in a circle, the first contact ball will contact a first arc contact surface on the outer wall of two fixed pry plates. The contact makes the first contact ball slide along the surface of the first arc contact surface, and the fixed pry plate is forced to move upwards. The fixed pry plate drives the unilateral insulating braided protection tube to be lifted and deformed upwards. When the first contact ball continues to move in a circle and the contact state with the fixed pry plate is released, the insulating braided protection tube is rebounded and reset according to the material characteristics. In this way, the operation of vibrating and cleaning the insulating braided protection tube is realized. The intelligent control display panel will start the transmission motor regularly, so that the effect of intelligently cleaning the dust on the cable is achieved, the detection data is kept accurate, and the normal operation of the power distribution switch control equipment in the smart grid industry is protected.

Description

Technical Field

[0001] This invention relates to the field of resistance testing technology, specifically to a circuit resistance testing device for a high-voltage disconnector switch. Background Technology

[0002] With the rapid development of the smart grid industry and the intelligent upgrading of distribution networks, high-voltage disconnect switches, as core switching and protection devices in the distribution switch control equipment manufacturing industry, have become a key link in ensuring the safe and stable operation of the power grid through accurate detection of their conductive circuit contact resistance. Currently, the distribution switch control equipment manufacturing industry and power operation and maintenance sites widely use loop resistance testing devices for factory testing and on-site preventative testing of high-voltage disconnect switches. These devices rely on the four-wire DC voltage drop testing principle, using test clamps to hold the disconnect switch circuit at both ends, and connected to the device body via braided cables to achieve high current injection and micro-resistance signal acquisition. This effectively reflects the contact status of the contacts, providing data support for equipment condition assessment and safe operation and maintenance in the smart grid industry.

[0003] The connecting cables between the test clamps and the main body of the device often use a braided sheath structure. In outdoor sand and dust environments, dust easily adheres to and accumulates on the surface and inside the gaps of the braided cables. Since such devices need to continuously output high currents of 100A or more during testing, dust accumulation on the cable surface will significantly hinder heat dissipation, leading to excessive cable temperature rise and accelerated aging of the insulation layer. This not only affects the testing accuracy and service life of power distribution switch control equipment, but also makes it difficult to meet the stringent requirements of the smart grid industry for the long-term reliable operation of testing equipment. The lack of a fixed storage location for the cables results in long-term dragging and exposure to the outside environment, making their surfaces prone to wear and dust accumulation, which in turn leads to accelerated aging of the cable insulation layer. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit resistance testing device for high-voltage disconnect switches, in order to solve the problems mentioned in the background art, such as dust easily adhering to and accumulating on the surface and inside the gaps of braided cables, dust accumulation on the cable surface significantly hinders heat dissipation, leading to excessive cable temperature rise, accelerated aging of the insulation layer, and the lack of a fixed storage location for the cable, resulting in long-term dragging and exposure to the outside world, making its surface prone to wear and dust accumulation, which in turn leads to accelerated aging of the cable insulation layer over time.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a loop resistance testing device for a high-voltage disconnecting switch, comprising a loop resistance testing device body and a fixing frame. The loop resistance testing device body has an installation groove. The fixing frame is fixedly connected to the inner wall of the installation groove. A second transmission gear is rotatably connected to the inner wall of the fixing frame. The outer contour of the second transmission gear matches the inner contour of the fixing frame. Multiple annularly arranged first guide rods are slidably mounted on the second transmission gear. Multiple annularly distributed fixing sleeves are fixedly connected to the inner wall of the second transmission gear. Second guide rods are slidably connected to the inner wall of the fixing sleeves. A fixing ring is fixedly mounted on the inner wall of the loop resistance testing device body. An insulating braided protective tube is rotatably connected to the outer wall of the fixing ring. Two test cables are fixedly sleeved on the inner wall of the insulating braided protective tube. One end of each test cable is fixedly connected to a test conductive clamp.

[0006] Preferably, a first abutting ball is rotatably mounted on one end of the first guide rod, and a second abutting ball is rotatably mounted on the other end of the first guide rod. A second fixing plate is fixedly sleeved on the first guide rod, and a second return spring is sleeved on the first guide rod. One end of the second return spring is fixedly connected to the outer wall of the second fixing plate, and the other end of the second return spring is fixedly connected to the outer wall of the second transmission gear.

[0007] Preferably, the outer wall of the insulating braided protective tube is fixedly connected to two fixed pry plates, and the outer wall of the fixed pry plate is provided with a first arc-shaped contact surface, and the movement trajectory of the first contact ball contacts the fixed pry plate.

[0008] Preferably, a first abutting block is fixedly connected to the inner wall of the fixed frame, and two second arc-shaped abutting surfaces are formed on the outer wall of the first abutting block, and the movement trajectory of the second abutting ball abuts against the first abutting block.

[0009] Preferably, a third return spring is fixedly connected to the inner wall of the fixed sleeve, and a second guide rod is fixedly connected to one end of the third return spring. The second guide rod is slidably connected to the inner wall of the fixed sleeve, and a third abutment ball is rotatably installed at one end of the second guide rod.

[0010] Preferably, a second abutment block is fixedly connected to the outer wall of the insulating braided protective tube. The second abutment block is a spherical block. The movement trajectory of the third abutment ball is in contact with the second abutment block. One end of the insulating braided protective tube is rotatably connected to the outer wall of the fixed ring. A torsion spring is sleeved on the outer wall of the insulating braided protective tube. A first fixing plate is fixedly sleeved on the outer wall of the insulating braided protective tube. One end of the torsion spring is fixedly connected to the outer wall of the first fixing plate, and the other end of the torsion spring is fixedly connected to the outer wall of the fixed ring.

[0011] Preferably, a drive motor is fixedly installed on the outer wall of the fixed frame, and a first drive gear is fixedly connected to the output end of the drive motor. One end of the first drive gear is rotatably connected to the inner wall of the fixed frame. The first drive gear and a second drive gear mesh with each other. A corrugated hose is fixedly connected to the outer wall of the insulating braided protective tube, and the corrugated hose is fixedly connected to the inner wall of the fixed frame.

[0012] Preferably, the inner wall of the mounting groove is fixedly connected with a plurality of evenly distributed limiting and fixing blocks, the outer wall of the limiting and fixing blocks is provided with a limiting groove for receiving the insulating braided protective tube, the inner wall of the limiting groove is provided with a first receiving groove, the inner wall of the first receiving groove is provided with a second receiving groove, and the inner wall of the second receiving groove is slidably connected with a sliding block.

[0013] Preferably, a lifting pressure plate is fixedly connected to the outer wall of the sliding block, a convex pressure plate is fixedly connected to the outer wall of the lifting pressure plate, and a first return spring is fixedly connected to the outer wall of the lifting pressure plate. The other end of the first return spring is fixedly connected to the inner wall of the first storage groove.

[0014] Preferably, an intelligent control display panel is fixedly installed on the outer wall of the main body of the loop resistance testing device, and control buttons and a start switch are fixedly installed on the outer wall of the main body of the loop resistance testing device. Heat dissipation grooves are formed on the outer wall of the main body of the loop resistance testing device.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, when the first contact ball rotates circumferentially, it abuts against the first arc-shaped contact surface of the outer wall of the two fixed skids. Since the first arc-shaped contact surface is curved, the abutment causes the first contact ball to slide along the surface of the first arc-shaped contact surface, causing the fixed skids to be subjected to upward force. The fixed skids drive the single-sided insulating braided protective tube to be lifted and deformed upward. When the first contact ball continues to move circumferentially and releases the contact state with the fixed skids, the insulating braided protective tube rebounds and resets according to the material properties. This performs a vibration cleaning operation on the insulating braided protective tube. The intelligent control display panel intelligently starts the transmission motor at regular intervals, thereby achieving the effect of intelligently cleaning the dust on the outside of the cable, ensuring that the detection data remains accurate over a long period of time, and thus protecting the normal operation of the power distribution switch control equipment in the smart grid industry.

[0016] 2. In this invention, as the second abutting ball slides upward, it drives the first guide rod and the first abutting ball to move upward synchronously. The first abutting ball abuts against the fixed pry plate in the contact state, causing the fixed pry plate to be pressed and increasing the friction between them. This causes the fixed pry plate to be subjected to circumferential movement force synchronously. The fixed pry plate drives the insulating braided protective tube to rotate. When the second abutting ball releases its contact with the first abutting block, the insulating braided protective tube quickly twists and resets according to the material properties, causing the insulating braided protective tube to vibrate momentarily, further cleaning the dust accumulated on the outer wall.

[0017] 3. In this invention, multiple limiting and fixing blocks are provided in the mounting groove. After the main body of the circuit resistance testing device is used up, the insulating braided protective tube is bent and pressed into the limiting groove on the limiting and fixing block. When pressed, the outer wall of the insulating braided protective tube abuts against the convex pressure plate. The abutment causes the convex pressure plate to move upward into the first receiving groove under force, so that the first return spring is in a compressed and taut state. The inner contour of the limiting groove matches the outer contour of the insulating braided protective tube. When the insulating braided protective tube is completely fitted into the limiting groove, the first return spring continues to press down the lifting pressure plate, so that the lifting pressure plate presses against the convex pressure plate and is tightly attached to the outer wall of the insulating braided protective tube. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the overall bottom view of the present invention; Figure 3 This is a schematic diagram of the overall side view structure of the present invention; Figure 4 This is a schematic diagram of the limiting and fixing block structure of the present invention; Figure 5 This is a schematic cross-sectional view of the limiting and fixing block of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed frame of the present invention; Figure 7 This is a front cross-sectional view of the fixed frame structure of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic cross-sectional view of the fixed sleeve structure of the present invention.

[0019] In the attached diagram, the components represented by each number are as follows: 1. Main body of the loop resistance testing device; 2. Intelligent control display panel; 3. Control button; 4. Start switch; 5. Mounting groove; 6. Fixing frame; 7. Insulating braided protective tube; 8. Limiting fixing block; 9. Test cable; 10. Test conductive clamp; 11. Heat dissipation groove; 12. Drive motor; 13. Limiting groove; 14. First storage slot; 15. Second storage slot; 16. Sliding block; 17. First return spring; 18. Lifting pressure plate; 19. Convex pressure plate; 20. First transmission gear; 1. Second transmission gear; 22. First fixing plate; 23. Torsion spring; 24. Fixing ring; 25. Fixing pry plate; 26. First arc-shaped contact surface; 27. First guide rod; 28. First contact ball; 29. ​​Second fixing plate; 30. Second return spring; 31. First contact block; 32. Second arc-shaped contact surface; 33. Second contact ball; 34. Fixing sleeve; 35. Third return spring; 36. Second guide rod; 37. Third contact ball; 38. Second contact block; 39. Corrugated hose. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a technical solution: such as Figure 1 - Figure 9 The circuit resistance testing device for a high-voltage disconnector switch shown includes a circuit resistance testing device body 1 and a fixing frame 6. The circuit resistance testing device body 1 has an installation groove 5. The fixing frame 6 is fixedly connected to the inner wall of the installation groove 5. A second transmission gear 21 is rotatably connected to the inner wall of the fixing frame 6. The outer contour of the second transmission gear 21 matches the inner contour of the fixing frame 6. Multiple annularly arranged first guide rods 27 are slidably installed on the second transmission gear 21. Multiple annularly distributed fixing sleeves 34 are fixedly connected to the inner wall of the second transmission gear 21. Second guide rods 36 are slidably connected to the inner wall of the fixing sleeves 34. A fixing ring 24 is fixedly installed on the inner wall of the circuit resistance testing device body 1. An insulating braided protective tube 7 is rotatably connected to the outer wall of the fixing ring 24. Two test cables 9 are fixedly sleeved on the inner wall of the insulating braided protective tube 7. One end of the test cable 9 is fixedly connected to a test conductive clamp 10.

[0022] A first abutting ball 28 is rotatably mounted on one end of the first guide rod 27, and a second abutting ball 33 is rotatably mounted on the other end of the first guide rod 27. A second fixing plate 29 is fixedly sleeved on the first guide rod 27, and a second return spring 30 is sleeved on the first guide rod 27. One end of the second return spring 30 is fixedly connected to the outer wall of the second fixing plate 29, and the other end of the second return spring 30 is fixedly connected to the outer wall of the second transmission gear 21.

[0023] Two fixed pry plates 25 are fixedly connected to the outer wall of the insulating braided protective tube 7. The outer wall of the fixed pry plate 25 is provided with a first arc-shaped contact surface 26, and the movement trajectory of the first contact ball 28 contacts the fixed pry plate 25.

[0024] The inner wall of the fixed frame 6 is fixedly connected to the first abutment block 31. The outer wall of the first abutment block 31 has two second arc-shaped abutment surfaces 32. The movement trajectory of the second abutment ball 33 abuts against the first abutment block 31.

[0025] A third return spring 35 is fixedly connected to the inner wall of the fixed sleeve 34. A second guide rod 36 is fixedly connected to one end of the third return spring 35. The second guide rod 36 is slidably connected to the inner wall of the fixed sleeve 34. A third abutment ball 37 is rotatably installed at one end of the second guide rod 36.

[0026] A second contact block 38 is fixedly connected to the outer wall of the insulating braided protective tube 7. The second contact block 38 is a spherical block. The movement trajectory of the third contact ball 37 is in contact with the second contact block 38. One end of the insulating braided protective tube 7 is rotatably connected to the outer wall of the fixing ring 24. A torsion spring 23 is sleeved on the outer wall of the insulating braided protective tube 7. A first fixing piece 22 is fixedly sleeved on the outer wall of the insulating braided protective tube 7. One end of the torsion spring 23 is fixedly connected to the outer wall of the first fixing piece 22, and the other end of the torsion spring 23 is fixedly connected to the outer wall of the fixing ring 24.

[0027] A drive motor 12 is fixedly installed on the outer wall of the fixed frame 6. A first drive gear 20 is fixedly connected to the output end of the drive motor 12. One end of the first drive gear 20 is rotatably connected to the inner wall of the fixed frame 6. The first drive gear 20 and the second drive gear 21 mesh with each other. A corrugated hose 39 is fixedly connected to the outer wall of the insulating braided protective tube 7. The corrugated hose 39 is fixedly connected to the inner wall of the fixed frame 6.

[0028] The inner wall of the mounting groove 5 is fixedly connected with a plurality of evenly distributed limiting and fixing blocks 8. The outer wall of the limiting and fixing block 8 is provided with a limiting groove 13 for storing the insulating braided protective tube 7. The inner wall of the limiting groove 13 is provided with a first storage groove 14. The inner wall of the first storage groove 14 is provided with a second storage groove 15. The inner wall of the second storage groove 15 is slidably connected with a sliding block 16.

[0029] A lifting pressure plate 18 is fixedly connected to the outer wall of the sliding block 16. A convex pressure plate 19 is fixedly connected to the outer wall of the lifting pressure plate 18. A first reset spring 17 is fixedly connected to the outer wall of the lifting pressure plate 18. The other end of the first reset spring 17 is fixedly connected to the inner wall of the first storage groove 14.

[0030] The outer wall of the main body 1 of the loop resistance testing device is fixedly equipped with an intelligent control display panel 2, a control button 3 and a start switch 4, and a heat dissipation groove 11.

[0031] Working principle: When performing resistance testing on the circuit of a high-voltage disconnector switch, the main body 1 of the circuit resistance testing device is first placed close to the ground next to the circuit of the disconnector switch. Then, the insulating braided protective tube 7 and the test cable 9 are stretched out. The two test conductive clamps 10 are clamped on the inlet and outlet ends of the high-voltage switch circuit, respectively. At this time, the main body 1 of the circuit resistance testing device is started by the start switch 4. The intelligent control display panel 2 is controlled by the operation control button 3. The detected resistance value can be directly observed on the intelligent control display panel 2, thereby calculating the voltage, current and other data. The entire process relies on the intelligent control display panel 2 to intelligently calculate and obtain the results.

[0032] During the test, the drive motor 12 is started. After starting, the drive motor 12 drives the first drive gear 20 at the output end to rotate. When the first drive gear 20 rotates, it meshes with and drives the second drive gear 21 to rotate. When the second drive gear 21 rotates, it drives the multiple fixed sleeves 34 on the inner wall to rotate in a circle. When the fixed sleeves 34 rotate in a circle, they drive the second guide rod 36 and the third abutting ball 37 to rotate synchronously. When the third abutting ball 37 moves in a circle, it abuts against the second abutting block 38 on the outer wall of the insulating braided protective tube 7. Since the second abutting block 38 is set as a spherical block, the abutment causes the third abutting ball 37 to rub against the outer wall of the second abutting block 38. The friction causes the second abutting block 38 to drive the insulating braided protective tube 7 to rotate. When the insulating braided protective tube 7 rotates, it drives the first fixed plate 22 and the torsion plate 26 to rotate in a circle. The torsion spring 23 rotates synchronously. When the torsion spring 23 rotates, it stores torque. As the second contact block 38 and the third contact ball 37 continue to contact, the third contact ball 37 is forced to slide the second guide rod 36 toward the inner wall of the fixed sleeve 34. During the sliding process, the third return spring 35 is compressed. At this time, the third contact ball 37 continues to move in a circle to release the contact with the second contact block 38. When the third contact ball 37 completely releases the contact with the second contact block 38, the torsion spring 23 torsionally resets and drives the first fixed plate 22 and the insulating braided protective tube 7 to rotate and reset. The rapid twisting and rotating reset of the insulating braided protective tube 7 can shake off the dust on the outer wall. After the torsion reset, the torsion spring 23 will twist back and forth for a period of time, further driving the insulating braided protective tube 7 to rotate and clean the dust.

[0033] When the second transmission gear 21 rotates, it also drives multiple first guide rods 27 to move in a circular motion. When the first guide rods 27 move in a circular motion, they drive the first abutting balls 28 at their ends to rotate. When the first abutting balls 28 rotate in a circular motion, they abut against the first arc-shaped abutting surfaces 26 on the outer walls of the two fixed pry plates 25. Since the first arc-shaped abutting surfaces 26 are arc surfaces, the abutting causes the first abutting balls 28 to slide along the surface of the first arc-shaped abutting surfaces 26, causing the fixed pry plates 25 to be subjected to upward force. The fixed pry plates 25 drive the insulating braided protective tube 7 on one side to be lifted and deformed. When the first abutting balls 28 continue to move in a circular motion and release the abutting state with the fixed pry plates 25, the insulating braided protective tube 7 springs back to its original position according to the material properties, thereby performing a vibration cleaning operation on the insulating braided protective tube 7.

[0034] When the first guide rod 27 moves in a circular motion, it drives the second abutting ball 33 at the other end to move in a circular motion simultaneously. When the second abutting ball 33 moves, it will abut against the first abutting block 31. When it abuts, the second abutting ball 33 slides along the second arc-shaped abutting surface 32 on the outer wall of the first abutting block 31 until it slides to a flat position on the surface of the first abutting block 31. At this time, as the second abutting ball 33 slides upward, it drives the first guide rod 27 and the first abutting ball 28 to move upward simultaneously. The first abutting ball 28 abuts against the fixed pry plate 25 in the contact state, causing the fixed pry plate 25 to be pressed and increasing the friction between them. This causes the fixed pry plate 25 to be subjected to the circumferential movement force simultaneously. The fixed pry plate 25 drives the insulating braided protective tube 7 to rotate. When the second abutting ball 33 releases its contact with the first abutting block 31, the insulating braided protective tube 7 quickly twists and resets according to the material properties, causing the insulating braided protective tube 7 to vibrate momentarily, further cleaning the dust accumulated on the outer wall.

[0035] Multiple limiting and fixing blocks 8 are provided in the mounting groove 5. After the main body 1 of the circuit resistance testing device is used up, the insulating braided protective tube 7 is bent and pressed into the limiting groove 13 on the limiting and fixing block 8. When pressed, the outer wall of the insulating braided protective tube 7 abuts against the convex pressure plate 19. The abutment causes the convex pressure plate 19 to move upward into the first receiving groove 14 under force, so that the first return spring 17 is in a compressed and taut state. The inner contour of the limiting groove 13 matches the outer contour of the insulating braided protective tube 7. When the insulating braided protective tube 7 is completely fitted into the limiting groove 13, the first return spring 17 continues to press down the lifting pressure plate 18, so that the lifting pressure plate 18 presses against the convex pressure plate 19 and is close to the outer wall of the insulating braided protective tube 7, thus locking the insulating braided protective tube 7 in the limiting groove 13. When needed, the sliding block 16 is pulled up to make the lifting pressure plate 18 compress the first return spring 17 upward and move, so that the insulating braided protective tube 7 can be removed.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circuit resistance testing device for a high-voltage disconnector, comprising a circuit resistance testing device body (1) and a fixing frame (6), characterized in that: The main body (1) of the loop resistance testing device is provided with an installation groove (5). The fixing frame (6) is fixedly connected to the inner wall of the installation groove (5). The inner wall of the fixing frame (6) is rotatably connected to a second transmission gear (21). The outer contour of the second transmission gear (21) matches the inner contour of the fixing frame (6). Multiple first guide rods (27) are slidably installed on the second transmission gear (21) in a uniform ring. Multiple fixed sleeves (34) are fixedly connected to the inner wall of the second transmission gear (21) in a uniform ring. The inner wall of the fixed sleeve (34) is slidably connected to a second guide rod (36). The inner wall of the main body (1) of the loop resistance testing device is fixedly installed with a fixing ring (24). The outer wall of the fixing ring (24) is rotatably connected to an insulating braided protective tube (7). The inner wall of the insulating braided protective tube (7) is fixedly sleeved with two test cables (9). One end of the test cable (9) is fixedly connected to a test conductive clamp (10).

2. The circuit resistance testing device for a high-voltage disconnector according to claim 1, characterized in that: A first abutting ball (28) is rotatably mounted on one end of the first guide rod (27), and a second abutting ball (33) is rotatably mounted on the other end of the first guide rod (27). A second fixing plate (29) is fixedly sleeved on the first guide rod (27), and a second return spring (30) is sleeved on the first guide rod (27). One end of the second return spring (30) is fixedly connected to the outer wall of the second fixing plate (29), and the other end of the second return spring (30) is fixedly connected to the outer wall of the second transmission gear (21).

3. The circuit resistance testing device for a high-voltage disconnector according to claim 2, characterized in that: The outer wall of the insulating braided protective tube (7) is fixedly connected to two fixed pry plates (25). The outer wall of the fixed pry plate (25) is provided with a first arc-shaped contact surface (26). The movement trajectory of the first contact ball (28) is in contact with the fixed pry plate (25).

4. The circuit resistance testing device for a high-voltage disconnector according to claim 2, characterized in that: The inner wall of the fixed frame (6) is fixedly connected to a first abutting block (31), and the outer wall of the first abutting block (31) has two second arc-shaped abutting surfaces (32). The movement trajectory of the second abutting ball (33) abuts against the first abutting block (31).

5. The circuit resistance testing device for a high-voltage disconnector according to claim 1, characterized in that: The inner wall of the fixed sleeve (34) is fixedly connected to a third return spring (35), and one end of the third return spring (35) is fixedly connected to a second guide rod (36). The second guide rod (36) is slidably connected to the inner wall of the fixed sleeve (34), and one end of the second guide rod (36) is rotatably mounted with a third abutment ball (37).

6. The circuit resistance testing device for a high-voltage disconnector according to claim 5, characterized in that: The outer wall of the insulating braided protective tube (7) is fixedly connected to a second abutment block (38), which is a spherical block. The movement trajectory of the third abutment ball (37) is in contact with the second abutment block (38). One end of the insulating braided protective tube (7) is rotatably connected to the outer wall of the fixing ring (24). The outer wall of the insulating braided protective tube (7) is fitted with a torsion spring (23). The outer wall of the insulating braided protective tube (7) is fixedly fitted with a first fixing piece (22). One end of the torsion spring (23) is fixedly connected to the outer wall of the first fixing piece (22), and the other end of the torsion spring (23) is fixedly connected to the outer wall of the fixing ring (24).

7. The circuit resistance testing device for a high-voltage disconnector according to claim 1, characterized in that: A drive motor (12) is fixedly installed on the outer wall of the fixed frame (6). A first drive gear (20) is fixedly connected to the output end of the drive motor (12). One end of the first drive gear (20) is rotatably connected to the inner wall of the fixed frame (6). The first drive gear (20) meshes with the second drive gear (21). A corrugated hose (39) is fixedly connected to the outer wall of the insulating braided protective tube (7). The corrugated hose (39) is fixedly connected to the inner wall of the fixed frame (6).

8. The circuit resistance testing device for a high-voltage disconnector according to claim 1, characterized in that: The inner wall of the mounting groove (5) is fixedly connected with a plurality of evenly distributed limiting fixing blocks (8). The outer wall of the limiting fixing block (8) is provided with a limiting groove (13) for storing the insulating braided protective tube (7). The inner wall of the limiting groove (13) is provided with a first storage groove (14). The inner wall of the first storage groove (14) is provided with a second storage groove (15). The inner wall of the second storage groove (15) is slidably connected with a sliding block (16).

9. The circuit resistance testing device for a high-voltage disconnector according to claim 8, characterized in that: The outer wall of the sliding block (16) is fixedly connected to a lifting pressure plate (18), the outer wall of the lifting pressure plate (18) is fixedly connected to a convex pressure plate (19), the outer wall of the lifting pressure plate (18) is fixedly connected to a first reset spring (17), and the other end of the first reset spring (17) is fixedly connected to the inner wall of the first storage groove (14).

10. The circuit resistance testing device for a high-voltage disconnector according to claim 1, characterized in that: The outer wall of the main body (1) of the loop resistance testing device is fixedly installed with an intelligent control display panel (2), and the outer wall of the main body (1) of the loop resistance testing device is fixedly installed with a control button (3) and a start switch (4). The outer wall of the main body (1) of the loop resistance testing device is provided with a heat dissipation groove (11).

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