Automatic docking ring main unit loop resistance testing device and testing method
By designing an automatic docking and clamping mechanism for the contact rods and drive components of cylinder one and cylinder two, the problem of inconvenient clamping of the ring main unit circuit resistance testing device in the ring main unit is solved, achieving portability and convenience, and ensuring the smooth conduct of the test.
Patent Information
- Application Number
- CN202511176339.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-21
- Publication Date
- 2025-11-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing loop resistance testing devices are difficult to clamp the contacts effectively in ring main units, resulting in inconvenience in testing. In addition, the devices are large in size and occupy a lot of space.
The design features a contact rod consisting of cylinder one and cylinder two. A drive assembly enables four clamping blocks to move synchronously toward the center, achieving automatic docking. An auxiliary assembly prevents the clamping blocks from loosening. Rubber rings facilitate handheld use, and buckles secure the contact rod.
It achieves portability and convenience in testing the circuit resistance of ring main units, with good clamping effect, avoiding loosening of the clamps, adapting to confined spaces, and ensuring smooth testing.
Smart Images
Figure CN120971819A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of resistance testing, in particular to an automatic docking ring main unit loop resistance testing device and testing method. BACKGROUND
[0002] In order to ensure the safe operation and electrical performance of the ring main unit, the loop resistance of the ring main unit needs to be tested. The smaller the resistance value is, the better the electrical conductivity is. If the resistance is too large, it will cause additional power loss when the current passes through, causing local overheating, and even endangering the safety of the equipment and power grid.
[0003] The existing loop resistance testing device is found to have a large volume when in use. The size of the gap in the ring main unit is limited, and it is not easy to clamp the contacts of the ring main unit when testing the loop resistance, so it needs to be improved.
[0004] Therefore, it is necessary to provide an automatic docking ring main unit loop resistance testing device and testing method. SUMMARY
[0005] Therefore, the present application provides an automatic docking ring main unit loop resistance testing device and testing method to solve the problems in the background art.
[0006] In order to achieve the above purpose, the present application provides the following technical scheme: an automatic docking ring main unit loop resistance testing device, comprising a resistance tester main body, two contact rods electrically connected to the front side of the resistance tester main body;
[0007] The contact rod comprises a cylinder one and a cylinder two, the cylinder two is sleeved outside the cylinder one and in sliding contact with it, the inner wall of the cylinder one is fixedly connected with four hollow columns, the outer part of each of the four hollow columns is slidably sleeved with a moving block, the inner side of each of the four moving blocks is fixedly connected with a clamping block, the outer end inner wall of each of the four hollow columns is fixedly connected with a spring one, and the inner end of each of the four spring ones is fixedly connected with the outer side of each of the four clamping blocks.
[0008] The two sides of the cylinder two are provided with a through groove, and a push block is slidably arranged in the two through grooves, and the push block is in contact with the inner wall of the top of the cylinder two.
[0009] The driving assembly is arranged between the cylinder one and the cylinder two, which is used for synchronously moving the four clamping blocks to the middle, and two auxiliary assemblies are arranged between the cylinder two and the cylinder one, which are mirror-symmetrically distributed, and are used for limiting the driving assembly to avoid loosening of the four clamping blocks.
[0010] Preferably, the driving assembly comprises a stand fixedly connected to the inner wall of the top of the first cylinder, a square block fixedly connected to the bottom end of the stand, four installation grooves formed in the square block, four connecting rods fixedly connected to the installation grooves, and four push rods, each of which is sleeved with the connecting rod.
[0011] Preferably, a through groove is formed in each of the four push rods, and a sliding groove is formed in the front and back of each through groove. Four moving blocks penetrate the four through grooves, respectively. Two connecting blocks are fixedly connected to each of the four moving blocks. Eight connecting blocks penetrate the eight sliding grooves and slide with the eight sliding grooves, respectively.
[0012] Preferably, a moving shell is slidably sleeved with the outside of the stand, the moving shell is sleeved with the outside of the square block, the four push rods are in sliding contact with the bottom of the moving shell, a second spring is fixedly connected between the top inner wall of the moving shell and the square block and is sleeved with the outside of the stand, a stop block is fixedly sleeved with the outside of the stand and is in contact with the top of the moving shell, two link rods are fixedly connected to the top of the moving shell, the top end of each of the two link rods is fixedly connected to the inner wall of the top of the second cylinder, and each of the two link rods penetrates the top of the first cylinder and is in sliding contact with the top of the first cylinder.
[0013] Preferably, the auxiliary assembly comprises a shell fixedly embedded in one side of the moving shell, a bolt slidably arranged in the shell, the one side of the bolt being arranged in a circular arc shape, a third spring arranged in the shell and fixedly connected to the inner wall of the shell and the bolt at two ends, respectively, two connecting blocks fixedly connected to the inner wall of one side of the first cylinder, two shafts one embedded in the two connecting blocks, respectively, two stop rods fixedly connected to one side of the two shafts one, and the one end of each of the two stop rods being arranged in a circular arc shape.
[0014] Preferably, the auxiliary assembly further comprises a through groove formed in the first cylinder, the through groove being located directly above the two shafts one, a fixed block fixedly connected to the inner wall of one side of the first cylinder, a moving rod slidably embedded in the fixed block, a U-shaped rod fixedly connected to the bottom end of the moving rod, the U-shaped rod penetrating the through groove and being in sliding contact with the through groove, protrusions fixedly connected to the inner wall of the front and back of the U-shaped rod, guide grooves formed in the two shafts one, the top end of the moving rod being fixedly connected to the bottom of the push block, a fourth spring fixedly connected between the fixed block and the push block, and the fourth spring being sleeved with the outside of the moving rod.
[0015] Preferably, a circular plate is fixedly connected to the bottom end of each of the two shafts one, a torsion spring is fixedly connected between each of the two circular plates and the two connecting blocks, respectively, and the two torsion springs are sleeved with the outside of the two shafts one, respectively, a rotating rod is fixedly connected to one side of each of the two shafts one, a protruding rod is arranged on the front side of each of the two rotating rods, the top of each of the two connecting blocks is fixedly connected to the two protruding rods, respectively, and the shaft one and the connecting block are connected through a bearing.
[0016] Preferably, the two external fixing sleeves of the cylinder are provided with rubber rings.
[0017] Preferably, the two sides of the resistance tester main body are fixedly connected with buckles.
[0018] The application also provides a looped network cabinet loop resistance test method with automatic docking, and the specific steps are as follows.
[0019] S1, a handheld touch rod is used to insert the cylinder I into the looped network cabinet contact, so that the cylinder I covers the contact;
[0020] S2, the cylinder II is pressed downward, the connecting rod and the moving shell are driven to move downward, and the spring II is compressed;
[0021] S3, the moving shell extrudes the push rod, so that the push rod rotates around the connecting rod, drives the moving block and the clamping block to move to the middle, clamps the contact and stretches the spring I;
[0022] S4, when the moving shell moves downward, the latch is reset under the action of the spring III after passing the stop rod, and the stop rod is clamped to prevent the clamping block from loosening;
[0023] S5, another touch rod cylinder I is inserted into the other contact in the same way, and the loop resistance test can be performed.
[0024] The application has the following beneficial effects:
[0025] 1, the application designs a touch rod composed of cylinder I and cylinder II, and four clamping blocks are designed in the cylinder I, when in use, the cylinder I is inserted into the contact of the looped network cabinet, so that the four clamping blocks can be located outside the contact, then the cylinder II is pressed to move on the cylinder I, since the driving assembly is designed between the cylinder I and the cylinder II, the four clamping blocks can be moved to the middle to clamp the contact under the action of the driving assembly, so that the automatic docking with the contact is realized, and the docking is simple and convenient, only one insertion and one pressing are needed, and the space requirement is small during docking, and the loop resistance test is more portable;
[0026] 2, the application designs an auxiliary assembly, which can limit the clamping blocks when the four clamping blocks clamp the contact, so that the four clamping blocks can be prevented from loosening after clamping, so that the loop resistance test can be normally carried out. DETAILED DESCRIPTION
[0027] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating any creative labor.
[0028] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and are not used to limit the conditions that the application can be implemented, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that the application can produce, should still fall within the scope of the technology disclosed by the application.
[0029] Figure 1 The overall structural schematic diagram provided by the application is shown in the figure;
[0030] Figure 2 The overall structural schematic diagram provided by the application is shown in the figure; Figure 1 The cross-sectional view of the middle touch rod;
[0031] Figure 3 The overall structural schematic diagram provided by the application is shown in the figure; Figure 2 The enlarged view of A in the figure;
[0032] Figure 4 The overall structural schematic diagram provided by the application is shown in the figure; Figure 2 The enlarged view of B in the figure;
[0033] Figure 5 The overall structural schematic diagram provided by the application is shown in the figure; Figure 1 ;
[0034] Figure 6 The overall structural schematic diagram provided by the application is shown in the figure; Figure 2 ;
[0035] Figure 7 The overall structural schematic diagram provided by the application is shown in the figure; Figure 6 The enlarged view of C in the figure;
[0036] Figure 8 The overall structural schematic diagram provided by the application is shown in the figure;
[0037] Figure 9 The overall structural schematic diagram provided by the application is shown in the figure; Figure 8 The enlarged view of D in the figure.
[0038] In the figure: 1, resistance tester main body; 2, touch rod; 3, cylinder one; 4, cylinder two; 5, hollow column; 6, moving block; 7, clamping block; 8, spring one; 9, push block; 10, stand column; 11, square block; 12, connecting rod; 13, push rod; 14, connecting block; 15, moving shell; 16, spring two; 17, stop block; 18, connecting rod; 19, shell; 20, latch; 21, spring three; 22, connecting block; 23, rotating shaft one; 24, stop rod; 25, fixed block; 26, moving rod; 27, U-shaped rod; 28, protruding block; 29, guide groove; 30, spring four; 31, round plate; 32, torsional spring; 33, rotating rod; 34, protruding rod; 35, buckle; 36, rubber ring. DETAILED DESCRIPTION
[0039] The preferred embodiments of the present application will be described hereinafter with reference to the accompanying drawings, in which, for purposes of
[0040] With reference to the accompanying drawings Figure 1 - the accompanying drawings Figure 9 The automatic butt joint ring main unit loop resistance testing device provided by the present application comprises a resistance tester main body 1, and two contact rods 2 are arranged on the front side of the resistance tester main body 1 and electrically connected with the resistance tester main body 1.
[0041] The contact rod 2 comprises a cylinder one 3 and a cylinder two 4, the cylinder two 4 is sleeved outside the cylinder one 3 and in sliding contact with the cylinder one 3, four hollow columns 5 are fixedly connected to the inner wall of the cylinder one 3, four moving blocks 6 are slidably sleeved outside the four hollow columns 5, four clamping blocks 7 are fixedly connected to the inner side of the four moving blocks 6, four spring ones 8 are fixedly connected to the outer end inner wall of the four hollow columns 5, and the inner ends of the four spring ones 8 are fixedly connected with the outer sides of the four clamping blocks 7 respectively.
[0042] Through grooves are formed on both sides of the cylinder two 4, and a push block 9 is slidably arranged in the two through grooves, and the push block 9 is in contact with the inner wall of the top of the cylinder two 4.
[0043] A driving assembly is arranged between the cylinder one 3 and the cylinder two 4, which is used for synchronously moving the four clamping blocks 7 to the middle, and two mirror-symmetrically distributed auxiliary assemblies are further arranged between the cylinder two 4 and the cylinder one 3, which are used for limiting the driving assembly to avoid loosening of the four clamping blocks 7.
[0044] The driving assembly comprises a stand column 10 fixedly connected to the inner wall of the top of the cylinder one 3, a square block 11 fixedly connected to the bottom end of the stand column 10, four installation grooves formed in the square block 11, four connecting rods 12 fixedly connected in the four installation grooves, four push rods 13 sleeved outside the four connecting rods 12 and connected with the connecting rods 12 through bearings, through grooves formed in the four push rods 13 and slide grooves formed on the front and back sides of the through grooves, four moving blocks 6 respectively penetrating through the four through grooves, two connecting blocks 14 fixedly connected to the four moving blocks 6, eight connecting blocks 14 respectively penetrating through the eight slide grooves and in sliding contact with the eight slide grooves, a moving shell 15 slidably sleeved outside the stand column 10, the moving shell 15 being sleeved outside the square block 11, the four push rods 13 being in sliding contact with the bottom of the moving shell 15, a spring two 16 fixedly connected between the inner wall of the top of the moving shell 15 and the square block 11 and sleeved outside the stand column 10, a stop block 17 fixedly sleeved outside the stand column 10 and in contact with the top of the moving shell 15, two link rods 18 fixedly connected to the inner wall of the top of the cylinder two 4 and penetrating through the top of the cylinder one 3 and in sliding contact with the top of the cylinder one 3.
[0045] In the embodiment, the cylinder 3 is inserted on the contact of the ring net cabinet, so that the four clamping blocks 7 can be located outside the contact, then the cylinder 2 is pressed to move on the cylinder 1, and the four clamping blocks 7 can be moved to the middle to clamp the contact due to the driving assembly designed between the cylinder 1 and the cylinder 2, so that the automatic butt joint with the contact is realized;
[0046] In order to avoid the loosening of the clamping of the clamping block 7 on the contact, the auxiliary assembly includes a shell 19 fixedly embedded on one side of the moving shell 15, a bolt 20 slidably arranged in the shell 19, the bolt 20 being provided with a circular arc on one side, a spring 21 arranged in the shell 19 and fixedly connected with the bolt 20 and the inner wall of the shell 19 at both ends, two connecting blocks 22 fixedly connected with the inner wall of one side of the cylinder 1, two rotating shafts 23 embedded on the two connecting blocks 22, two stop rods 24 fixedly connected with the rotating shafts 23 on one side and provided with a circular arc on one end, a through slot opened in the cylinder 1 and located above the two rotating shafts 23, a fixed block 25 fixedly connected with the inner wall of one side of the cylinder 1, a moving rod 26 slidably embedded on the fixed block 25, a U-shaped rod 27 fixedly connected with the bottom end of the moving rod 26 and penetrating through the through slot and in sliding contact with the through slot, two protrusions 28 fixedly connected with the inner walls of the front and rear sides of the U-shaped rod 27, two guide grooves 29 opened in the two rotating shafts 23, the top end of the moving rod 26 fixedly connected with the bottom of the push block 9, a spring 30 fixedly connected between the fixed block 25 and the push block 9 and sleeved outside the moving rod 26, two circular plates 31 fixedly connected with the bottom ends of the two rotating shafts 23, two torsional springs 32 fixedly connected with the two connecting blocks 22 and sleeved outside the two rotating shafts 23, two rotating rods 33 fixedly connected with the two rotating shafts 23 on one side, two protruding rods 34 provided on the front sides of the two rotating rods 33 and fixedly connected with the top of the two connecting blocks 22, and the rotating shaft 23 and the connecting block 22 are connected through a bearing, so that the auxiliary assembly can avoid the loosening of the clamping of the clamping block 7 on the contact.
[0047] In order to facilitate the handheld touch rod 2, the rubber ring 36 is fixedly sleeved outside the cylinder 2.
[0048] In order to fix the touch rod 2, the clasp 35 is fixedly connected with the two sides of the resistance tester main body 1, so that the touch rod 2 can be conveniently fixed.
[0049] The use process of the present application is as follows: as Figure 1As shown, when the looped net cabinet needs to be tested, the hand-held contact rod 2 is inserted into the contact of the looped net cabinet, so that the cylinder 1 3 can cover the outside of the contact, and then the cylinder 2 4 is pressed down. Because the cylinder 2 4 is in sliding contact with the cylinder 1 3, the cylinder 2 4 can be moved downward on the cylinder 1 3 when the cylinder 2 4 is pressed down, so that the two connecting rods 1 8 and the moving shell 1 5 can be moved downward, and the moving shell 1 5 can be moved downward to compress the spring 2 1 6;
[0050] Because the four push rods 1 3 are in sliding contact with the bottom of the moving shell 1 5, the four push rods 1 3 can be pressed to rotate around the four connecting rods 1 2 as the rotating shafts when the moving shell 1 5 is moved downward, so that the bottom ends of the four push rods 1 3 can move inward. Because the connecting block 1 4 on the moving block 6 penetrates the sliding slot on the push rod 1 3, the four moving blocks 6 can move inward when the bottom ends of the four push rods 1 3 move inward, so that the four clamping blocks 7 can move inward, and the four clamping blocks 7 can contact and clamp the contact. In this way, automatic docking is achieved. When the four clamping blocks 7 move inward, the four springs 1 8 can also be stretched;
[0051] When the moving shell 1 5 moves downward, the two shell bodies 1 9 and the two pins 2 0 can also move downward. Because the end of the pin 2 0 is arc-shaped, the end of the blocking rod 2 4 is also arc-shaped. When the two pins 2 0 move downward with the moving shell 1 5, the pins 2 0 can move into the shell body 1 9, so that the two pins 2 0 can easily move over the two blocking rods 2 4. When the pins 2 0 move over the blocking rods 2 4, the pins 2 0 can quickly reset under the action of the spring 3 2 1. When the four clamping blocks 7 clamp the contact, the pins 2 0 can contact the bottom of the blocking rod 2 4. Even when the spring 2 1 6 and the four springs 1 8 are in the state of returning to the original position, the moving shell 1 5 will not move upward, and the four clamping blocks 7 will not move outward;
[0052] Then, according to the same principle, the other contact rod 2 is inserted into the other contact of the looped net cabinet, and the looped net cabinet can be tested. The clamping block 7, the moving block 6, the hollow column 5, the cylinder 1 3 and the cylinder 2 4 are made of conductive materials, so that the transmission of electricity can be ensured.
[0053] When the push cylinder 4 is pressed to move downward, the push block 9, the two moving rods 26, the two U-shaped rods 27, and the like are also moved downward, and the two springs 30 are compressed, so that the two moving rods 26 are close to the two rotating shafts 23. When the test is completed and the contact rod 2 needs to be removed from the contact head, the push block 9 is pushed downward, so that the two moving rods 26 are moved downward, and the two U-shaped rods 27 and the four protrusions 28 are moved downward, and the four protrusions 28 are moved into the guide grooves 29 on the four rotating shafts 23, so that the two rotating shafts 23 are rotated, and the two blocking rods 24 are rotated, so that the blocking rods 24 are removed from the two pins 20, and the resistance to the pins 20 is removed. When the resistance is removed, the spring 16 and the four springs 8 are restored, so that the four clamping blocks 7 and the four moving blocks 6 are moved outward and restored. The moving shell 15, the shell 19, the two pins 20, and the push cylinder 4 are moved upward and restored. When the push cylinder 4 is moved upward, the two springs 30 are further compressed. When all the components are restored, the push block 9 is released, and the push block 9, the two moving rods 26, the two U-shaped rods 27, and the four protrusions 28 are moved upward and restored under the action of the springs 30. When the components are restored, the push cylinder 3 and the push cylinder 4 are removed from the contact head, and the contact rod 2 is removed from the contact head. The other contact head is removed by the same principle.
[0054] When the protrusions 28 are moved downward to rotate the rotating shafts 23, the circular plate 31 is also rotated, so that the torsional spring 32 is elastically deformed, and the rotating rod 33 is separated from the protruding rod 34. When the protrusions 28 are moved upward to reverse the rotating shafts 23, the torsional spring 32 is restored, so that the rotating shafts 23 are normally reversed, and the rotating rod 33 and the protruding rod 34 are in contact again. The rotating rod 33 and the protruding rod 34 can limit the rotating shafts 23, so that the rotating shafts 23 are not excessively rotated.
[0055] The above is only a preferred embodiment of the present application, and any skilled person in the art can modify the above technical solutions or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement according to the technical solutions of the present application is within the scope of protection of the present application.
Claims
1. A loop resistance testing device for automatically interfacing with a ring main unit, characterized in that, Including resistance tester main body (1), the resistance tester main body (1) front side is equipped with two with its electrical connection contact rod (2); The contact rod (2) includes cylinder one (3) and cylinder two (4), the cylinder two (4) is sleeved on the outside of cylinder one (3) and is in sliding contact with it, the inner wall of cylinder one (3) is fixedly connected with four hollow columns (5), four hollow columns (5) are slidably sleeved with four moving blocks (6), four moving blocks (6) are fixedly connected with four clamping blocks (7) on the inner side, four hollow columns (5) are fixedly connected with spring one (8) on the inner wall of the outer end, four spring one (8) inner end is respectively fixedly connected with four clamping blocks (7) on the outer side. The cylinder two (4) is provided with a through groove on both sides, and the push block (9) is slidably arranged in the two through grooves, and the push block (9) is in contact with the inner wall of the top of the cylinder two (4). The driving assembly is arranged between the cylinder two (4) and the cylinder one (3), which is used for synchronously moving the four clamping blocks (7) to the middle, and the two auxiliary assemblies are symmetrically arranged between the cylinder two (4) and the cylinder one (3), which are used for limiting the driving assembly to avoid loosening of the four clamping blocks (7).
2. The automatically docked ring main unit circuit resistance test device according to claim 1, characterized in that: The driving assembly includes a stand column (10) fixedly connected to the inner wall of the top of the cylinder one (3), a square block (11) fixedly connected to the bottom end of the stand column (10), four installation grooves formed in the square block (11), four connecting rods (12) fixedly connected in the four installation grooves, and four push rods (13) sleeved on the outside of the four connecting rods (12) and connected with the connecting rods (12) through bearings.
3. The automatic loop resistance testing device for ring main unit according to claim 2, characterized in that: Four through grooves are formed in the four push rods (13), and slide grooves are formed on the front and back sides of the through grooves, four moving blocks (6) penetrate through the four through grooves, and two connecting blocks (14) are fixedly connected to the four moving blocks (6).
4. The automatically docked ring main unit loop resistance test device according to claim 3, characterized in that: The moving shell (15) is slidably sleeved on the outside of the stand column (10), the square block (11), the four push rods (13) are in sliding contact with the bottom of the moving shell (15), the spring two (16) is fixedly connected between the inner wall of the top of the moving shell (15) and the square block (11) and sleeved on the outside of the stand column (10), the stop block (17) is fixedly sleeved on the outside of the stand column (10) and in contact with the top of the moving shell (15), two link rods (18) are fixedly connected to the top of the moving shell (15), the top ends of the two link rods (18) are fixedly connected to the inner wall of the top of the cylinder two (4), and the two link rods (18) penetrate through the top of the cylinder one (3) and are in sliding contact with it.
5. The automatically docked ring main unit circuit resistance test device according to claim 1, characterized in that: The auxiliary assembly comprises a shell (19) fixedly embedded on one side of the moving shell (15), a latch (20) slidably arranged inside the shell (19), the latch (20) being provided in an arc shape on one side, a spring three (21) arranged inside the shell (19) and fixedly connected at both ends to the latch (20) and the inner wall of the shell (19), two connecting blocks (22) fixedly connected to the inner wall on one side of the cylinder one (3), two rotating shafts one (23) embedded on the two connecting blocks (22), two stop rods (24) fixedly connected to the rotating shafts one (23) on one side, and the two stop rods (24) being provided in an arc shape on one end.
6. The automatically docked ring main unit circuit resistance test device according to claim 5, characterized in that: The auxiliary assembly further comprises a through groove provided on the cylinder one (3) and located directly above the two rotating shafts one (23), a fixed block (25) fixedly connected to the inner wall on one side of the cylinder one (3), a moving rod (26) slidably embedded on the fixed block (25), a U-shaped rod (27) fixedly connected to the bottom end of the moving rod (26), the U-shaped rod (27) penetrating through the through groove and being in sliding contact with the through groove, protruding blocks (28) fixedly connected to the inner walls on the front and back sides of the U-shaped rod (27), guide grooves (29) provided on the two rotating shafts one (23), the top end of the moving rod (26) being fixedly connected to the bottom of the push block (9), a spring four (30) fixedly connected between the fixed block (25) and the push block (9) and sleeved outside the moving rod (26).
7. The automatic loop resistance testing device for ring main unit according to claim 5, characterized in that: The bottom end of each of the two rotating shafts one (23) is fixedly connected to a circular plate (31), a torsional spring (32) is fixedly connected between each of the two circular plates (31) and the two connecting blocks (22) and sleeved outside the two rotating shafts one (23), a rotating rod (33) is fixedly connected to each of the two rotating shafts one (23) on one side, a protruding rod (34) is provided on the front side of each of the two rotating rods (33), each of the two protruding rods (34) is fixedly connected to the top of each of the two connecting blocks (22), and the rotating shaft one (23) and the connecting block (22) are connected through a bearing.
8. The automatically docked ring main unit circuit resistance test device according to claim 1, characterized in that: The cylinder two (4) is fixedly sleeved with a rubber ring (36) outside.
9. The automatically docking ring main unit loop resistance testing device according to claim 1, characterized in that: The resistance tester main body (1) is fixedly connected with buckles (35) on both sides.
10. A method for testing the loop resistance of an automatically docked ring main unit, suitable for use with the testing device according to any one of claims 1 to 9, characterized in that The specific steps are as follows: S1, hold the touch rod (2), insert the cylinder one (3) into the ring main unit contact, and cover the contact with the cylinder one (3); S2, press down the cylinder two (4), drive the connecting rod (18) and the moving shell (15) to move downward, and compress the spring two (16); S3, the moving shell (15) extrudes the push rod (13), so that the push rod (13) rotates around the connecting rod (12), drives the moving block (6) and the clamping block (7) to move to the middle, clamps the contact and stretches the spring one (8); S4, when the moving shell (15) moves downward, the latch (20) passes over the stop rod (24) and resets under the action of the spring three (21), clamping the stop rod (24) to prevent the clamping block (7) from loosening; S5, insert the other touch rod (2) cylinder one (3) into the other contact in the same way, and the loop resistance test can be performed.