Circuit conduction grounding test device for cable box transformer substation installation

Abstract

The invention relates to the field of grounding test devices, and discloses a circuit conduction grounding test device for cable box transformer substation installation, which comprises a tester, a base and a base, the base and the tester rotate relative to each other, the base is connected with the tester through a lead, the base is provided with an abrasive disc and a conduction column, and the conduction column is electrically connected with the tester. A supporting assembly used for supporting the conduction column is arranged in the base, and an adjusting assembly which is used for moving the abrasive disc and vertically corresponds to the supporting assembly is arranged above the base. Through cooperation of the base, the base, the supporting assembly, the adjusting assembly and the like, when the grinding piece is driven to descend to grind a to-be-detected part, the conduction column can be driven to automatically contract to avoid the grinding piece, and then interference between the grinding piece and the extending conduction column is avoided; after the abrasive disc is reset, the conduction column can automatically stretch out to abut against the polished to-be-detected part, and the contact effect of the conduction column and the to-be-detected part can be guaranteed through the supporting assembly.

Description

Technical Field

[0001] This invention relates to the field of grounding test device technology, and in particular to a circuit continuity grounding test device for cable box transformer installation. Background Technology

[0002] Grounding piles in prefabricated substations are exposed to outdoor or industrial environments for extended periods, resulting in the formation of oxide layers, rust layers, and dust and dirt on their surfaces. These substances have extremely high resistivity, which significantly increases the contact resistance during testing, leading to measurement results that are far higher than the actual conduction resistance value and causing misjudgments. Therefore, it is necessary to grind the part to be tested during grounding continuity testing of the grounding pile.

[0003] For example, Chinese Patent Publication No. CN118641797B discloses a circuit continuity and grounding test device for cable transformer installation, including a grounding continuity resistance tester, a current lead, and an insulating clamp. The insulating clamp includes a front clamp plate, a rear clamp plate, a connecting assembly, and a spring assembly. The connecting assembly is used to adjust the clamping distance. The front clamp plate is also equipped with a connecting port and a grinding blade. The connecting port is used to connect the current lead, and the grinding blade is used to polish the surface of the clamping area of ​​the insulating clamp. It uses an insulating clamp with a grinding blade to fix the test contact end, allowing for precise polishing of the contact point after the clamp is fixed, making it more convenient and accurate. Simultaneously, the sliding adjustable clamping distance connecting assembly structure allows for adjustment of the clamping distance to meet clamping requirements, resulting in higher practicality and compatibility. Its clamping is less prone to loosening, poor contact, and high contact resistance.

[0004] The application first fixes the clamp to the grounding stake by adjusting the spacing of the connecting components, then moves the grinding blade to grind the part to be tested, and finally rotates the connecting end to make it contact the ground part to be tested. The overall operation steps are cumbersome, which results in a long contact time between the connecting end and the ground part to be tested, thus affecting the working efficiency of the continuity grounding test and having certain limitations.

[0005] Therefore, it is necessary to provide a circuit continuity and grounding test device for cable box transformer installation to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a circuit continuity and grounding test device for cable box transformer installations to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, a circuit continuity and grounding test device for cable box transformers is designed, which allows the conductor to automatically avoid the grinding disc during grinding and automatically align with the tested part after grinding.

[0008] Based on the above ideas, the present invention provides the following technical solution: a circuit continuity and grounding test device for cable box transformer installation, comprising a test instrument and a base and a bottom that rotate relative to each other. The base is connected to the test instrument via a lead wire. The bottom is provided with a grinding disc and a conductive post, and the conductive post is electrically connected to the test instrument. The bottom is provided with a support component for supporting the conductive post. The bottom is provided with an adjustment component for moving the grinding disc and corresponding vertically to the support component. When the adjustment component is pressed down, the support component can drive the conductive post to retract into the bottom to avoid the grinding disc.

[0009] As a further embodiment of the present invention: the adjustment component includes a pressure rod that slides with the base and is used to drive the grinding disc. The outer surface of the pressure rod is fitted with a partition plate that is fixedly connected to the grinding disc. The bottom of the partition plate is fixedly installed with a vertical rod and a square telescopic rod that correspond to the support component. The movable end of the square telescopic rod is slidably engaged with the support component.

[0010] As a further aspect of the present invention: the bottom of the pressure rod is rotatably engaged with the top of the grinding disc, the grinding disc and the pressure rod can be raised and lowered synchronously, and the grinding disc can rotate circumferentially based on the bottom of the pressure rod.

[0011] As a further embodiment of the present invention: a lifting spring is sleeved on the outer surface of the pressure rod and above the base.

[0012] As a further embodiment of the present invention: the support assembly includes a sleeve block fixedly sleeved on the outer surface of the guide post and slidably engaged with the square telescopic rod. The side wall of the sleeve block is fixedly installed with side plates corresponding to the vertical rod. A movable telescopic rod is rotatably installed between the sleeve block and the base. A first spring is sleeved on the outer surface of the movable telescopic rod.

[0013] As a further aspect of the present invention: the top of the side plate is provided with an inclined surface, and when the vertical rod descends and contacts the inclined surface, it can drive the side plate to retract into the base.

[0014] As a further aspect of the present invention: the distance between the bottom of the grinding disc and the conductive post is greater than the distance between the bottom of the vertical rod and the side plate.

[0015] As a further aspect of the present invention: the top of the sleeve block is provided with a square groove for sliding the square telescopic rod, so that the square telescopic rod and the sleeve block can rotate synchronously through the square groove, and the square telescopic rod can slide along the length direction of the square groove.

[0016] As a further aspect of the present invention: the grinding disc includes a top plate that moves up and down synchronously with the pressure rod and a grinding plate that slides along the bottom of the top plate. The top plate is fixedly connected to the partition plate. A guide rod that abuts against the base is fixedly installed on the surface of the grinding plate. A second spring that abuts against the base is fixedly installed on the surface of the guide rod.

[0017] As a further embodiment of the present invention: a wave plate is fixedly installed on the inner wall of the base, one end of the guide rod abuts against the inner wall of the base and corresponds vertically to the wave plate, and a second spring is fixedly installed on the other end of the guide rod, so that the guide rod has a tendency to move towards the wave plate.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: through the cooperation between the base, the base plate, the support component and the adjustment component, when the grinding disc is driven to descend and grind the part to be tested, the conductive post can be driven to automatically retract and avoid the grinding disc, thereby avoiding interference between the grinding disc and the extended conductive post; after the grinding disc is reset, the conductive post can automatically extend and abut against the grounded part to be tested, and the conductive post can ensure the contact effect with the part to be tested through the support component, thereby ensuring the subsequent test effect of the grounding pile.

[0019] With the automatic retraction and movement of the conduction column, there is no need to wait until the grinding disc is finished grinding the test area before manually adjusting the position of the conduction column, which simplifies the operation steps and significantly improves the test efficiency. Moreover, its operation method is also simpler, which can effectively reduce the operator's workload.

[0020] The base and the pedestal rotate to clamp the grounding stake, which not only ensures effective contact with the part to be tested, but also effectively reduces the clamping and fixing steps between the clamp and the grounding stake, making the clamping method simpler and more convenient. This can further improve the overall test efficiency and is also applicable to grounding stakes of different thicknesses, thus making it more practical. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0022] Figure 1 This is a perspective view of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the base and pedestal structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the rotating shaft and torsion spring structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the cavity and through-hole structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the partition and vertical rod structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the top plate and grinding plate structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the arc-shaped groove and arc-shaped block structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the guide rod and the second spring structure of the present invention;

[0030] Figure 9 This is a schematic diagram of the top plate and chute structure of the present invention;

[0031] Figure 10 for Figure 9 Enlarged view of the structure at point A in the middle.

[0032] In the diagram: 1. Chuck; 2. Testing instrument; 3. Lead wire; 4. Grinding disc; 5. Conductor post; 6. Support assembly; 7. Adjustment assembly; 8. Shaft; 9. Torsion spring; 10. Inclined surface; 101. Base; 102. Base plate; 103. Cavity; 104. Through hole; 105. Arc groove; 106. Arc block; 107. Guide block; 108. Slope; 109. Arc surface; 110. Bend plate; 401. Top plate; 402. Grinding plate; 403. Guide rod; 404. Second spring; 405. Slide groove; 601. Sleeve block; 602. Movable telescopic rod; 603. First spring; 604. Side plate; 605. Square groove; 701. Pressure rod; 702. Partition plate; 703. Square telescopic rod; 704. Vertical rod. Detailed Implementation

[0033] Example 1:

[0034] Please see Figures 1 to 5 This invention provides a circuit continuity and grounding test device for cable transformer installations. After the test area is ground, the conductive post 5 can automatically move to abut against the test area, thereby simplifying the operation steps and significantly improving test efficiency. The device includes a test instrument 2 and several clamps 1. In this embodiment, the test instrument 2 uses two clamps 1, and the clamps 1 are connected to the test instrument 2 via leads 3; wherein, as... Figure 2 As shown, the chuck 1 includes a base 102 and a base 101 that are rotatably connected to each other. The lead wire 3 is fixedly connected to the base 102, so that when the base 102 is moved, the base 101 can be moved synchronously.

[0035] Specifically, such as Figure 3 As shown, the base 102 and the base 101 are rotatably connected by a rotating shaft 8, and a torsion spring 9 is fitted on the outer surface of the rotating shaft 8. The rotating shaft 8 and the torsion spring 9 allow one side of the base 102 and the base 101 to be fitted together to correspond to the part to be tested, while the other side can be opened for operation. Furthermore, the base 101 is equipped with a grinding disc 4 and a conductive post 5. The grinding disc 4 is used to grind the part to be tested, and the conductive post 5 is made of conductive material and is electrically connected to the testing instrument 2 via an electrical wire. In the above structure, the testing instrument 2, lead wire 3, rotating shaft 8, torsion spring 9, grinding disc 4, and conductive post 5 are all existing mature technologies and will not be described in detail here.

[0036] Furthermore, such as Figure 3 As shown, the base 101 has a support component 6 inside for supporting the conductive post 5. In the initial state, the support component 6 allows the conductive post 5 to protrude relative to the surface of the grinding disc 4, thereby enabling the conductive post 5 to make effective contact with the part to be tested. An adjustment component 7 for moving the grinding disc 4 is provided above the base 101, and the adjustment component 7 and the support component 6 are in an upper and lower corresponding state. When the adjustment component 7 is pressed down, the grinding disc 4 is first driven to descend, and then the support component 6 drives the conductive post 5 to retract into the base 101 to avoid the grinding disc 4. At this time, the grinding disc 4 can descend to grind the part to be tested. When the adjustment component 7 rises, the grinding disc 4 can continue to grind the part to be tested, while the conductive post 5 can automatically extend based on the base 101 and abut against the part to be tested.

[0037] Reference Figure 4 In this embodiment, preferably, the bottom of the base 101 has a cavity 103 for accommodating the grinding disc 4, the guide post 5, the support assembly 6, and the adjustment assembly 7. The grinding disc 4 extends out from the base 101 on the side closest to the base 102, allowing the grinding disc 4 to make effective contact with the part to be tested. When the adjustment assembly 7 moves the grinding disc 4, the grinding disc 4 slides up and down along the cavity 103. The base 101 has a through hole 104 communicating with the cavity 103. The through hole 104 is also used to accommodate the guide post 5. The diameter of the through hole 104 is larger than the diameter of the guide post 5, and the movement of the guide post 5 is along the axial direction of the through hole 104.

[0038] Reference Figures 3 to 5 In this embodiment, preferably, the adjusting component 7 includes a pressure rod 701 that slides vertically with the base 101 and is used to drive the grinding plate 4. The bottom of the pressure rod 701 can be movably engaged with the grinding plate 4, so that the grinding plate 4 can rise and fall synchronously with the pressure rod 701. The grinding plate 4 can also rotate circumferentially based on the bottom of the pressure rod 701. At this time, the grinding plate 4 has rotation space and can form a complete fit with the part to be tested. Through the above design combined with the rotational engagement of the base 101 and the base 102, the clamp 1 can be effectively applied to grounding piles of different thicknesses, and the contact effect and grinding effect between the grinding plate 4 and the part to be tested can be guaranteed.

[0039] Among them, the outer surface of the pressure rod 701 is fitted with a partition 702 that is fixedly connected to the grinding disc 4. The partition 702 and the grinding disc 4 can rotate synchronously in the circumferential direction through the fixed connection. The bottom of the partition 702 is fixedly installed with a vertical rod 704 and a square telescopic rod 703 that correspond to the support component 6.

[0040] In the above structure, such as Figure 5As shown, the movable end of the square telescopic rod 703 is slidably engaged with the support component 6. The support component 6 and the partition 702 can rotate synchronously through the square telescopic rod 703, and the support component 6 can also move relative to the square telescopic rod 703 along the axial direction of the guide post 5.

[0041] To achieve automatic reset of the pressure rod 701 after it descends, such as Figure 3 As shown, a lifting spring (not shown in the figure) can also be fitted on the outer surface of the pressure rod 701 and above the base 101. When the pressure rod 701 descends, it squeezes the lifting spring. Subsequently, the lifting spring can make the pressure rod 701 rise automatically, thereby completing the rapid lifting process of the grinding disc 4, which can further improve the test efficiency.

[0042] Reference Figures 3 to 5 In this embodiment, preferably, the support assembly 6 includes a sleeve block 601 fixedly sleeved on the outer surface of the guide post 5. The side wall of the sleeve block 601 is fixedly installed with a side plate 604 corresponding to the vertical rod 704. When the vertical rod 704 descends with the partition plate 702 and contacts the side plate 604, it can drive the sleeve block 601 and the guide post 5 to retract into the base 101, so that the guide post 5 moves away from the base 102 along the axial direction of the through hole 104. The top of the sleeve block 601 is provided with a square groove 605 for the movable end of the square telescopic rod 703 to slide. Through the square telescopic rod 703 and the square groove 605, the sleeve block 601 can rotate synchronously with the partition plate 702, thereby causing the grinding disc 4 and the guide post 5 to rotate synchronously. When the grinding disc 4 rotates to correspond with the part to be measured, the guide post 5 can also rotate accordingly to correspond with the part to be measured.

[0043] Furthermore, such as Figure 5 As shown, a movable telescopic rod 602 is rotatably mounted between the sleeve block 601 and the cavity 103. The movable telescopic rod 602... Figure 5 The viewpoint can be rotated left and right, thus providing feasibility for the support and rotation of the sleeve block 601 and the guide post 5; at the same time, the outer surface of the movable telescopic rod 602 is fitted with a first spring 603, which makes the sleeve block 601 tend to move towards the base 102, so that the guide post 5 can effectively resist the part to be measured after rotation.

[0044] Specifically, such as Figure 5 As shown, the top of the side plate 604 is provided with an inclined surface 10. When the vertical rod 704 descends and contacts the inclined surface 10, it can drive the side plate 604 to retract into the cavity 103. The side plate 604 can also drive the guide post 5 to move synchronously through the sleeve block 601, thereby causing the guide post 5 to retract into the base 101 to avoid the grinding disc 4 from descending and grinding.

[0045] Correspondingly, such as Figure 5As shown, the distance between the bottom of the grinding disc 4 and the guide post 5 is greater than the distance between the bottom of the vertical rod 704 and the inclined surface 10. This allows the vertical rod 704 to contact the side plate 604 first, causing the guide post 5 to retract and avoid the impact, as the partition plate 702 descends with the grinding disc 4. Then, the grinding disc 4 descends to complete the grinding of the entire part to be tested.

[0046] In use, clamp 1 is held on the grounding stake so that the conductive post 5 corresponds to the side with the part to be tested. At this time, the grinding plate 4 can automatically rotate due to its rotational design to form a complete fit with the part to be tested. When the grinding plate 4 rotates, the conductive post 5 can be driven to rotate synchronously through the partition plate 702, the square telescopic rod 703, the square groove 605 and the sleeve block 601, so that the conductive post 5 also forms an effective correspondence with the part to be tested. Next, with one hand holding the clamp 1 and the other hand pressing down the pressure rod 701, the pressure rod 701 drives the fixed ends of the grinding disc 4, partition 702, vertical rod 704 and square telescopic rod 703 to move synchronously. At this time, the bottom of the vertical rod 704 first contacts the inclined surface 10. Through the inclined surface 10, side plate 604 and sleeve block 601, the conductive post 5 is driven to retract into the base 101. Then the grinding disc 4 descends and passes over the conductive post 5, which can realize the overall grinding of the part to be tested. When the pressure rod 701 rises later, the grinding disc 4 can continue to grind the part to be tested. The conductive post 5 can be automatically reset through the movable telescopic rod 602 and the first spring 603. The conductive post 5 can move and effectively resist the grounded part to be tested. During the movement, the movable end of the square telescopic rod 703 slides along the square groove 605. Finally, the test instrument 2 is started to carry out the circuit continuity and grounding test.

[0047] In summary, through the cooperation of structures such as the partition plate 702, the vertical rod 704, the sleeve block 601, and the movable telescopic rod 602, when the grinding plate 4 is driven to descend and grind the part to be tested, the conductive post 5 can automatically retract to avoid the grinding plate 4, thereby preventing interference between the grinding plate 4 and the extended conductive post 5. After the grinding plate 4 is reset, the conductive post 5 can automatically extend and abut against the ground part to be tested. The conductive post 5 can ensure the contact effect with the part to be tested through the first spring 603. Each time the conductive post 5 automatically resets and extends, it can collide and contact the part to be tested, which can reduce the debris residue on the part to be tested and ensure the subsequent test effect of the grounding pile.

[0048] With the automatic retraction and movement of the guide post 5, there is no need to wait until the grinding disc 4 has finished grinding the part to be tested before manually adjusting the position of the guide post 5. This simplifies the operation steps and significantly improves the test efficiency. Moreover, the operation method is also more convenient, thus effectively reducing the operator's workload.

[0049] By opening the cavity 103 and arranging the conductive post 5 below the grinding plate 4, on the one hand, the vertical rod 704 will not interfere with the base 101 when it descends, and on the other hand, the debris generated by the grinding plate 4 can be automatically discharged through the cavity 103, and will not accumulate in the base 101 to affect the test results, thereby improving the accuracy of the continuity grounding test.

[0050] The base 102 and the base 101 rotate to clamp the grounding stake. Combined with the rotatable design of the grinding disc 4 and the conductive post 5, while ensuring effective contact with the part to be tested, the clamping and fixing steps of the clamp 1 and the grounding stake can be effectively reduced. At this time, the clamping method of the clamp 1 is simpler and more convenient, which can further improve the overall test efficiency. It can also be used for grounding stakes of different thicknesses, so it is more practical.

[0051] Example 2:

[0052] Please see Figures 1 to 8 Based on Example 1, in order to further improve the accuracy of the conduction grounding test, the movement method of the grinding plate 4 is improved: at this time, the grinding plate 4 includes a top plate 401 that is rotatably engaged with the pressure rod 701 and a grinding plate 402 that is slidably engaged with the bottom of the top plate 401. When the top plate 401 rotates, it can drive the grinding plate 402 to rotate synchronously, and the grinding plate 402 can slide left and right along the bottom of the top plate 401; wherein, the top plate 401 is fixedly connected to the partition plate 702, and can still drive the fixed ends of the partition plate 702, the vertical rod 704 and the square telescopic rod 703 to move synchronously.

[0053] Furthermore, such as Figure 6 As shown, a guide rod 403 is fixedly installed on the surface of the grinding plate 402 near the base 101. The left end of the guide rod 403 abuts against the left side of the cavity 103, and a second spring 404 is fixedly installed on the right end of the guide rod 403, abutting against the right side of the cavity 103. Under the action of the second spring 404, the guide rod 403 causes the grinding plate 402 to tend to move to the left side of the cavity 103.

[0054] Among them, such as Figure 6 and Figure 7 As shown, three arc-shaped blocks 106 are fixedly installed on the left side wall of the cavity 103, and two arc-shaped grooves 105 are opened on the left side wall of the cavity. The three arc-shaped blocks 106 and the two arc-shaped grooves 105 are arranged in an alternating manner to form a wave-shaped vertical area. When the left end of the guide rod 403 descends along the cavity 103, it can pass through the arc-shaped blocks 106 and the arc-shaped grooves 105 in sequence, and then cooperate with the second spring 404 to make the grinding plate 402 also have a process of reciprocating left and right.

[0055] In use, the structure including the partition plate 702, vertical rod 704, and sleeve block 601 drives the grinding plate 4 to descend and grind the area to be tested. This allows the guide post 5 to automatically retract and avoid the grinding plate 4. The working process and effect of this part are the same as in Example 1, and will not be repeated here. The difference is that when the pressure rod 701 drives the top plate 401 to descend, the top plate 401 drives the grinding plate 402 to descend synchronously to grind the area to be tested. At this time, the top plate 401 drives the guide post 5 to automatically retract through the partition plate 702, vertical rod 704, and side plate 604. Meanwhile, the grinding plate 402, during its descent, also moves left and right through the guide rod 403, second telescopic rod, arc block 106, and arc groove 105, thereby effectively improving the grinding effect on the area to be tested.

[0056] Compared to Embodiment 1, through the cooperation of structures such as the top plate 401, grinding plate 402, arc block 106, and second spring 404, when the grinding plate 402 is driven to descend and grind the part to be tested, it can also be driven to move left and right in a reciprocating motion. Without affecting the automatic retraction of the conductive post 5, the grinding effect on the part to be tested can be further improved, thereby reducing the influence of surface materials on the part to be tested. Moreover, the debris generated by grinding can also be automatically discharged through the cavity 103, thereby ensuring the contact effect between the conductive post 5 and the part to be tested, and further improving the accuracy of the continuity and grounding test.

[0057] Example 3:

[0058] Please see Figures 1 to 10 Based on Embodiment 2, in order to further improve the accuracy of the conduction grounding test, the movement method of the grinding plate 402 is further improved: at this time, a guide block 107 is fixedly installed on the left cavity wall of the cavity 103. The guide block 107 replaces the bottom arc block 106, and the extension length of the guide block 107 relative to the left cavity wall of the cavity 103 is greater than the extension length of the arc block 106 relative to the left cavity wall of the cavity 103. That is, the guide block 107 is designed to protrude from the left cavity wall of the cavity 103 relative to the arc block 106.

[0059] Furthermore, such as Figure 10As shown, the surface of the guide block 107 has a connected slope 108 and an arc surface 109. When the guide rod 403 descends to the slope 108, it is also forcibly guided by the arc surface 109. Combined with the elastic force of the second spring 404, the guide rod 403 can slide along the slope 108 to the side away from the base 102, thereby causing the grinding plate 402 to move synchronously. At this time, the grinding plate 402 can be briefly separated from the part to be measured, so that the debris generated during grinding can flow down after separation. In order to achieve automatic reset of the guide rod 403, a curved plate 110 is fixedly installed on the left cavity wall of the cavity 103, which is arranged in close contact with the guide block 107. The curved plate 110 corresponds to the low point of the slope 108. When the guide rod 403 rises, it can automatically enter the arc groove 105 along the curved plate 110.

[0060] In this embodiment, as Figure 9 As shown, the grinding plate 402 will drive the top plate 401 to slide synchronously away from the base 102. Therefore, the top plate 401 and the pressure rod 701 are in sliding fit. Both the top plate 401 and the partition plate 702 are provided with sliding grooves 405 for the pressure rod 701 to move. When the grinding plate 402 drives the top plate 401 and the partition plate 702 to move, the pressure rod 701 moves along the sliding groove 405. At this time, it will not affect the up and down movement of the top plate 401 driven by the pressure rod 701.

[0061] To prevent the grinding plate 402 from being directly squeezed and sliding away from the base 102 after the chuck 1 clamps the grounding stake, a positioning spring (not shown in the figure) is fixedly installed on the side of the top plate 401 near the base 101, abutting against the cavity 103. The positioning spring allows the top plate 401 and the grinding plate 402 to extend out of the cavity 103 in the initial state, thereby providing space for the grinding plate 402 to drive the top plate 401 to move into the base 101. Or, as Figure 9 As shown, the second spring 404 can be designed to be inclined to replace the added positioning spring. In this case, the second spring 404 is inclined to the right and inside of the base 101. When the guide rod 403 slides along the slope 108, it will squeeze the second spring 404. When it is guided to move along the arc surface 109, it will also squeeze the second spring 404, which can also provide a feasibility for resetting the grinding plate 402.

[0062] In use, the structure of partition 702, vertical rod 704 and sleeve block 601 can drive the guide column 5 to automatically retract and avoid the grinding plate 4 when the grinding plate 4 is driven down to grind the part to be tested; the structure of top plate 401, grinding plate 402 and arc block 106 can also drive the grinding plate 402 to move left and right during the process of driving the grinding plate 402 down. The working process and effect of this part are the same as in embodiment 2, and will not be repeated here. The difference lies in the following: When the pressure rod 701 drives the top plate 401 to descend to its lowest point, the guide rod 403 contacts the guide block 107 and moves along the slope 108 and the arc surface 109. At this time, the guide rod 403 can drive the grinding plate 402 to retract into the base 101, so that the grinding plate 402 is separated from the part to be measured. At this time, the debris generated by grinding can flow down automatically, effectively reducing the accumulation of debris on the grinding plate 402 during grinding. At the same time, when the guide rod 403 slides along the slope 108, it will contact the curved plate 110. At this time, the curved plate 110 can provide a vibration effect on the guide rod 403 and the grinding plate 402, which can further reduce the accumulation of debris on the grinding plate 402.

[0063] Compared to Embodiment 2, through the cooperation of structures such as guide rod 403, guide block 107, slope 108, and arc surface 109, when the grinding plate 402 is about to descend to its lowest point, it can also be driven to retract into the base 101, causing the grinding plate 402 to briefly separate from the part to be tested. Simultaneously, during the separation and movement, the grinding plate 402 can collide with the curved plate 110, providing a vibration effect. At this time, the grinding debris generated can automatically flow down along the exposed space, effectively reducing debris accumulation on the grinding plate 402 during grinding, ensuring the grinding effect of the grinding plate 402 on the part to be tested and the subsequent contact effect between the conductive post 5 and the part to be tested. The overall scheme is combined with the movement of guide rod 403 and is located at the lowest point of the descent of the grinding plate 402. At this point, the flowing debris directly detaches from the base 101, effectively avoiding the influence of debris on the test results, further improving the accuracy of the conductivity grounding test, and having a better usage effect.

Claims

1. A circuit conduction grounding test device for a cable box transformer installation, comprising a tester and a base and a pedestal that rotate relative to each other, the base being connected to the tester by a lead, characterized in that, The base is provided with a grinding sheet and a conducting column, and the conducting column is electrically connected with the tester.

2. The circuit conduction ground test device for cable box transformer installations of claim 1, wherein, The adjusting assembly comprises a pressing rod in sliding fit with the base and used for driving the grinding sheet, the outer surface of the pressing rod is sleeved with a partition plate fixedly connected with the grinding sheet, the bottom of the partition plate is fixedly provided with a vertical rod and a square telescopic rod corresponding to the supporting assembly, and the movable end of the square telescopic rod is in sliding fit with the supporting assembly.

3. The circuit conduction ground test device for cable box transformer installations of claim 2, wherein, The bottom of the pressing rod is in rotary fit with the top of the grinding sheet, the grinding sheet and the pressing rod can be synchronously lifted and lowered, and the grinding sheet can be circumferentially rotated based on the bottom of the pressing rod.

4. The circuit conduction ground test device for cable box transformer installations of claim 2, wherein, The outer surface of the pressing rod and above the base is sleeved with a lifting spring.

5. The circuit conduction ground test device for cable box transformer installations of claim 2, wherein, The supporting assembly comprises a sleeve block fixedly sleeved on the outer surface of the conducting column and in sliding fit with the square telescopic rod, the side wall of the sleeve block is fixedly provided with a side plate corresponding to the vertical rod in up and down directions, the sleeve block and the base are jointly rotatably provided with a movable telescopic rod, and the outer surface of the movable telescopic rod is sleeved with a first spring.

6. The circuit conduction ground test device for cable box transformer installations of claim 5, wherein, The top of the side plate is provided with an inclined surface, when the vertical rod is lowered and contacted with the inclined surface, the side plate can be retracted into the base.

7. The circuit conduction ground test device for cable box transformer installations of claim 5, wherein, The distance between the bottom of the grinding sheet and the conducting column is greater than the distance between the bottom of the vertical rod and the side plate.

8. The circuit conduction ground test device for cable box transformer installations of claim 5, wherein, The top of the sleeve block is provided with a square groove for the square telescopic rod to slide, the square telescopic rod and the sleeve block can be synchronously rotated through the square groove, and the square telescopic rod can slide along the length direction of the square groove.

9. The circuit conduction ground test device for cable box transformer installations of claim 5, wherein, The grinding sheet comprises a top plate synchronously lifted and lowered with the pressing rod and a grinding plate in sliding fit along the bottom of the top plate, the top plate is fixedly connected with the partition plate, the surface of the grinding plate is fixedly provided with a guide rod abutting against the base, and the surface of the guide rod is fixedly provided with a second spring abutting against the base.

10. The circuit bonding ground test device for cable box installations of claim 9, wherein, The inner wall of the base is fixedly provided with a wave plate, one end of the guide rod abuts against the inner wall of the base and corresponds to the wave plate in up and down directions, and the second spring is fixedly installed at the other end of the guide rod, so that the guide rod has a tendency to move towards the wave plate.

Images