A constant current sweep technology-based distribution network capacitance current tester

Abstract

The utility model belongs to the field of capacitor current tester, specifically is a kind of based on constant current sweep technology distribution network capacitor current tester, including box body, the surface fixedly connected with soft block of box body, the middle part of soft block top is equipped with the slot, the surface of the slot is overlapped with tester body, the edge of box body top is fixedly connected with wire arrangement assembly, the bottom of tester body is sleeved with buffer assembly, through the structural design of wire arrangement assembly, test personnel when using this capacitor current tester, pull apart clamping plate while limit spring elongation, increase the distance between clamping plate and limit plate, then test personnel will test line pass through the arc-shaped gap of limit plate and connect the joint with the interface on tester body, when test personnel complete connection, stop pulling clamping plate, limit spring rebound, and drive clamping plate to move to the direction close to limit plate, test line is fixed by soft clamp block and limit plate, improve test efficiency.

Description

Technical Field

[0001] This utility model relates to the field of capacitance current testers, specifically a distribution network capacitance current tester based on constant current sweep frequency technology. Background Technology

[0002] A capacitance current tester is a specialized device used to measure the capacitance current to ground in a power distribution network. It is widely used in the detection of capacitance current in power systems where the neutral point is not effectively grounded. Its main function is to assess the magnitude of the capacitance current during a single-phase ground fault in the power grid to determine whether an arc suppression coil or other compensation device needs to be installed, while also preventing the occurrence of ferroresonant overvoltage in voltage transformers. The core principle of the distribution network capacitance current tester based on constant current sweep frequency technology is to accurately calculate the system's capacitance parameters to ground by injecting a constant current signal and scanning frequency changes.

[0003] In the existing technology, existing capacitance current testers require multiple test leads to be connected to the power grid under test during testing. Since the test leads are long and easily tangled, existing capacitance current testers are not convenient for routing multiple test leads, which reduces testing efficiency. At the same time, existing capacitance current testers are usually carried by hand, which poses a risk of dropping during transport. Existing capacitance current testers are not good at buffering the impacts they receive, which reduces their protective capabilities. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problems of existing capacitance current testers being inconvenient for routing multiple test leads and for buffering the impact on the capacitance current tester, this utility model proposes a distribution network capacitance current tester based on constant current sweep frequency technology.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The power distribution network capacitance current tester based on constant current sweep frequency technology of this utility model includes a housing; a soft block is fixedly connected to the surface of the housing, a slot is opened in the middle of the top of the soft block, the tester body is attached to the surface of the slot, a ribbon cable assembly is fixedly connected to the edge of the top of the housing, a buffer assembly is sleeved on the bottom of the tester body, and one end of the buffer assembly is fixedly connected to the housing.

[0006] The cable assembly includes a support plate fixedly connected to the edge of the top of the box, a limit plate rotatably connected to one side of the support plate, a limit spring fixedly connected to one side of the limit plate, a clamping plate fixedly connected to one end of the limit spring, and a soft clamping block fixedly connected to one side of the clamping plate.

[0007] The buffer assembly includes a movable plate sleeved on the bottom of the tester body. Horizontal buffer springs are fixedly connected to the sides of the movable plate in a linear array. One end of each horizontal buffer spring is fixedly connected to a housing. Vertical buffer springs are fixedly connected to the bottom of the movable plate in a rectangular array. The bottom of each vertical buffer spring is fixedly connected to a housing.

[0008] Preferably, a support block is attached to the bottom edge of the limiting plate, and the bottom of the support block is fixedly connected to the tester body.

[0009] Preferably, a rotating shaft is fixedly connected to one side of the box body, and a box cover is rotatably connected to the surface of the rotating shaft.

[0010] Preferably, a buckle is fixedly connected to one side of the box lid, and a retaining ring is fixedly connected to one side of the box body.

[0011] Preferably, a connecting plate is fixedly connected to the side of the box body near the retaining ring, and a handle is rotatably connected to one side of the connecting plate.

[0012] Preferably, a sliding plate is fixedly connected to one end of the clamping plate, and a limiting plate is slidably connected to the surface of the sliding plate.

[0013] The advantages of this utility model are:

[0014] 1. This utility model, through the structural design of the cable arrangement assembly, allows the tester to pull open the clamping plate while the limiting spring extends, increasing the distance between the clamping plate and the limiting plate. The tester then passes the test wire through the arc-shaped notch of the limiting plate and connects the connector to the interface on the tester body. After the tester completes the connection, pulling the clamping plate stops, the limiting spring returns, and the clamping plate moves closer to the limiting plate. The soft clamp and the limiting plate fix the test wire, enabling the capacitance current tester to arrange multiple test wires, thus improving testing efficiency.

[0015] 2. Through the structural design of the buffer assembly, when the capacitance current tester is dropped, the housing first collidees with the contact surface to absorb part of the impact force. At the same time, the movable plate drives the tester body to shake, offsetting the inertial force generated inside the housing at the moment of impact. During this process, depending on the location of the impact, the horizontal and vertical buffer springs are compressed to different degrees, further buffering the impact and increasing the elastic potential energy of the springs. After the impact, the springs rebound and slowly release the stored elastic potential energy, greatly reducing the peak impact force. Thus, the capacitance current tester can buffer the impact it receives, improving the protection of the capacitance current tester. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the ribbon cable assembly structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the buffer component structure of this utility model.

[0021] In the diagram: 1. Box body; 2. Soft block; 3. Tester body; 4. Cable assembly; 401. Support plate; 402. Limiting plate; 403. Limiting spring; 404. Clamping plate; 405. Soft clamping block; 5. Buffer assembly; 501. Movable plate; 502. Horizontal buffer spring; 503. Vertical buffer spring; 6. Support block; 7. Rotating shaft; 8. Box cover; 9. Buckle; 10. Snap ring; 11. Connecting plate; 12. Handle; 13. Sliding plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figures 1-4 As shown, a power distribution network capacitor current tester based on constant current sweep frequency technology includes a housing 1; a soft block 2 is fixedly connected to the surface of the housing 1, a slot is opened in the middle of the top of the soft block 2, the surface of the slot is overlapped with the tester body 3, a ribbon cable assembly 4 is fixedly connected to the top edge of the housing 1, a buffer assembly 5 is sleeved on the bottom of the tester body 3, and one end of the buffer assembly 5 is fixedly connected to the housing 1.

[0024] The cable assembly 4 includes a support plate 401 fixedly connected to the edge of the top of the box 1. A limit plate 402 is rotatably connected to one side of the support plate 401. A limit spring 403 is fixedly connected to one side of the limit plate 402. A clamping plate 404 is fixedly connected to one end of the limit spring 403. A soft clamping block 405 is fixedly connected to one side of the clamping plate 404.

[0025] The buffer assembly 5 includes a movable plate 501 sleeved on the bottom of the tester body 3. Horizontal buffer springs 502 are fixedly connected in a linear array on the side of the movable plate 501. A box 1 is fixedly connected to one end of the horizontal buffer springs 502. Vertical buffer springs 503 are fixedly connected in a rectangular array at the bottom of the movable plate 501. The box 1 is fixedly connected to the bottom of the vertical buffer springs 503.

[0026] During operation, thanks to the structural design of the cable assembly 4, when using the capacitance current tester, the tester pulls open the clamping plate 404 while the limiting spring 403 extends, increasing the distance between the clamping plate 404 and the limiting plate 402. The tester then passes the test wire through the arc-shaped notch of the limiting plate 402 and connects the connector to the interface on the tester body 3. After the tester completes the connection, pulling the clamping plate 404 stops, the limiting spring 403 rebounds, and the clamping plate 404 moves closer to the limiting plate 402. The soft clamp 405 and the limiting plate 402 fix the test wire, enabling the capacitance current tester to route multiple test wires, improving testing efficiency. The design of the buffer assembly 5 ensures that when the capacitance current tester is dropped, the housing 1 first collides with the contact surface to absorb part of the impact force. At the same time, the movable plate 501 causes the tester body 3 to shake, offsetting the inertial force generated inside the housing 1 at the moment of impact. During this process, depending on the location of the impact, the horizontal buffer springs 502 and the vertical buffer springs 503 are compressed to different degrees to further buffer the impact and increase the elastic potential energy of the springs. After the impact, the springs rebound and slowly release the stored elastic potential energy, greatly reducing the peak impact force. This allows the capacitance current tester to buffer the impact and improve its protective performance.

[0027] Furthermore, a support block 6 is attached to the bottom edge of the limiting plate 402, and the bottom of the support block 6 is fixedly connected to the tester body 3.

[0028] During operation, the support block 6 can support the limiting plate 402 so that it is parallel to the interface on the tester body 3.

[0029] Furthermore, a rotating shaft 7 is fixedly connected to one side of the box body 1, and a box cover 8 is rotatably connected to the surface of the rotating shaft 7.

[0030] During operation, the lid 8 can rotate around the axis of the rotating shaft 7.

[0031] Furthermore, a buckle 9 is fixedly connected to one side of the lid 8, and a retaining ring 10 is fixedly connected to one side of the body 1.

[0032] During operation, the buckle 9 and the retaining ring 10 lock the lid 8 after it is closed by locking the lid 8 in place.

[0033] Furthermore, a connecting plate 11 is fixedly connected to the side of the box body 1 near the retaining ring 10, and a handle 12 is rotatably connected to one side of the connecting plate 11.

[0034] During operation, the grip 12 facilitates carrying the capacitance current tester.

[0035] Furthermore, a sliding plate 13 is fixedly connected to one end of the clamping plate 404, and a limiting plate 402 is slidably connected to the surface of the sliding plate 13.

[0036] During operation, the vertical movement of the clamping plate 404 is restricted by the sliding connection between the sliding plate 13 and the limiting plate 402.

[0037] Working principle: When using the capacitance current tester, the tester pulls open the clamping plate 404, and the limiting spring 403 extends, increasing the distance between the clamping plate 404 and the limiting plate 402. The tester then passes the test lead through the arc-shaped notch in the limiting plate 402 and connects the connector to the interface on the tester body 3. After the connection is complete, the tester stops pulling the clamping plate 404. The limiting spring 403 rebounds, causing the clamping plate 404 to move closer to the limiting plate 402. The soft clamping block 405 secures the test lead to the limiting plate 402, carrying the test lead... When the capacitance current tester is accidentally dropped during operation, the housing 1 first collides with the contact surface to absorb part of the impact force during the impact. At the same time, the movable plate 501 causes the tester body 3 to shake, which counteracts the inertial force generated inside the housing 1 at the moment of impact. During this process, depending on the location of the impact, the horizontal buffer springs 502 and the vertical buffer springs 503 are compressed to different degrees to further buffer the impact and increase the elastic potential energy of the springs. After the impact, the springs rebound and slowly release the stored elastic potential energy, greatly reducing the peak impact force.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power distribution network capacitor current tester based on constant current sweep frequency technology, characterized in that: Includes a box body (1); a soft block (2) is fixedly connected to the surface of the box body (1), a slot is opened in the middle of the top of the soft block (2), a tester body (3) is attached to the surface of the slot, a ribbon cable assembly (4) is fixedly connected to the top edge of the box body (1), a buffer assembly (5) is sleeved on the bottom of the tester body (3), and a box body (1) is fixedly connected to one end of the buffer assembly (5). The cable assembly (4) includes a support plate (401) fixedly connected to the edge of the top of the box (1), a limit plate (402) rotatably connected to one side of the support plate (401), a limit spring (403) fixedly connected to one side of the limit plate (402), a clamping plate (404) fixedly connected to one end of the limit spring (403), and a soft clamping block (405) fixedly connected to one side of the clamping plate (404). The buffer assembly (5) includes a movable plate (501) sleeved on the bottom of the tester body (3). Horizontal buffer springs (502) are fixedly connected to the side of the movable plate (501) in a linear array. A box (1) is fixedly connected to one end of the horizontal buffer springs (502). Vertical buffer springs (503) are fixedly connected to the bottom of the movable plate (501) in a rectangular array. A box (1) is fixedly connected to the bottom of the vertical buffer springs (503).

2. The distribution network capacitor current tester based on constant current sweep frequency technology according to claim 1, characterized in that: A support block (6) is attached to the bottom edge of the limiting plate (402), and the bottom of the support block (6) is fixedly connected to the tester body (3).

3. The distribution network capacitor current tester based on constant current sweep frequency technology according to claim 1, characterized in that: A rotating shaft (7) is fixedly connected to one side of the box body (1), and a box cover (8) is rotatably connected to the surface of the rotating shaft (7).

4. A distribution network capacitor current tester based on constant current sweep frequency technology according to claim 3, characterized in that: A buckle (9) is fixedly connected to one side of the lid (8), and a retaining ring (10) is fixedly connected to one side of the body (1).

5. A distribution network capacitor current tester based on constant current sweep frequency technology according to claim 4, characterized in that: A connecting plate (11) is fixedly connected to the side of the box body (1) near the retaining ring (10), and a handle (12) is rotatably connected to one side of the connecting plate (11).

6. A distribution network capacitor current tester based on constant current sweep frequency technology according to claim 5, characterized in that: One end of the clamp (404) is fixedly connected to a sliding plate (13), and a limiting plate (402) is slidably connected to the surface of the sliding plate (13).

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