High-altitude loop resistance testing device

Abstract

The utility model relates to the technical field of resistance testing devices, and provides a high-altitude loop resistance testing device, which comprises a telescopic voltage-withstanding insulating tube formed by nesting a plurality of sections of epoxy glass fiber tubes and provided with a screw hole at the top end; the clamp module comprises an elastic clamping piece, a top head and an adjusting screw rod, the elastic clamping piece is fixedly arranged at the top end of the telescopic pressure-resistant insulating tube, the top head is fixedly arranged at the upper end of the adjusting screw rod, and the adjusting screw rod is arranged in a screw hole in the top end of the telescopic pressure-resistant insulating tube. The beneficial effects of the utility model lie in that the adjusting screw rod and the elastic clamping piece are adopted to form a pressure closed loop, 10-50N linear pressure adjustment is realized through a thread lead, the contact resistance fluctuation rate is compressed to + / -3 [mu] omega, the modularized telescopic structure is adaptive to equipment of different voltage grades, an operator can complete clamping and positioning of a tubular bus of phi 60-150mm on the ground, and the clamping and positioning efficiency is greatly improved. And the time consumption of single operation is obviously shortened.

Description

Technical Field

[0001] This utility model relates to the technical field of resistance testing devices, specifically to a high-altitude loop resistance testing device. Background Technology

[0002] The basic principle of traditional loop resistance testing is based on the DC voltage drop method. A DC current of at least 100A is applied to the circuit under test, the voltage drop generated as the current flows through the circuit is measured, and the resistance value is calculated using Ohm's law (R=U / I). This method employs a four-wire connection technique, separating the current output terminals (I+, I-) from the voltage measurement terminals (V+, V-), and clamping the voltage wire inside the current wire to eliminate the influence of wire resistance on measurement accuracy.

[0003] Traditional loop resistance testing requires operators to climb to the high-altitude equipment to manually secure the test clamps, which presents the following problems:

[0004] First, there are significant safety hazards: operators are at risk of falling while working at heights, and the test clamps may come into contact with live equipment, potentially causing electric shock.

[0005] Secondly, it is inconvenient to operate: uneven manual clamping force can easily lead to poor contact or data errors;

[0006] Finally, it is inefficient: the clamping position needs to be adjusted repeatedly, which is time-consuming and labor-intensive.

[0007] In existing technologies, some test clamps are designed with spring clamping structures, but they require manual operation and rely on scissor-like opening, resulting in limited contact area. Other patents propose adjustable clamps, but these still require close-range operation. Utility Model Content

[0008] This invention addresses the inherent operational risks during the testing of circuit resistance, which pose a threat to the personal safety of workers. When operators are climbing to make connections, there is a risk of falling if the ladder handles are not secure. This method of operation is time-consuming, labor-intensive, and has a low safety factor.

[0009] A high-altitude loop resistance testing device is provided, comprising:

[0010] The telescopic pressure-resistant insulating tube is composed of multiple nested sections of epoxy fiberglass tubes, with a screw hole at the top.

[0011] The clamp module includes an elastic clamp, a top head, and an adjusting screw. The elastic clamp is fixedly mounted on the top of the telescopic pressure-resistant insulating tube, the top head is fixedly mounted on the upper end of the adjusting screw, and the adjusting screw is mounted in the screw hole at the top of the telescopic pressure-resistant insulating tube.

[0012] As a preferred embodiment, the outer wall of the telescopic pressure-resistant insulating tube is covered with a corrugated pipe protective layer.

[0013] As a preferred embodiment, the withstand voltage rating of the telescopic withstand voltage insulating tube is ≥10kV.

[0014] As a preferred embodiment, the clamp modules are in the form of two units, symmetrically arranged at the top of the telescopic pressure-resistant insulating tube.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses multi-section epoxy fiberglass tubes (volume resistivity > 10¹²Ω·cm) and is designed with a withstand voltage rating of ≥10kV. It can form an effective insulation barrier in a 110kV substation environment, controlling the leakage current to <0.1mA, which significantly improves the safety factor compared with traditional bamboo ladder operation.

[0017] 2. This utility model adopts an adjusting screw and elastic clamp to form a pressure closed loop, and achieves 10-50N linear pressure adjustment through the thread lead, so that the contact resistance fluctuation rate is compressed to ±3μΩ. The modular telescopic structure is adapted to equipment of different voltage levels. Operators can complete the clamping and positioning of Φ60-150mm tubular busbars on the ground, and the time for a single operation is significantly shortened. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein...

[0019] Figure 1 A schematic diagram of the structure of Embodiment 1 of this utility model.

[0020] Figure 2 A schematic diagram of the structure of Embodiment 2 of this utility model.

[0021] The numbers in the attached diagram are:

[0022] 1. Telescopic pressure-resistant insulating tube; 2. Clamp module; 21. Elastic clamp; 22. Top head; 23. Adjusting screw. Detailed Implementation

[0023] To illustrate the features of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will further explain this utility model.

[0024] Example 1:

[0025] Please see Figure 1 This utility model provides a high-altitude loop resistance testing device, comprising:

[0026] The telescopic pressure-resistant insulating tube 1 is composed of multiple nested sections of epoxy fiberglass tubes with screw holes at the top. It uses multiple sections of epoxy fiberglass tubes (volume resistivity > 10¹²Ω·cm) and is designed with a withstand voltage rating of ≥10kV. It can form an effective insulation barrier in a 110kV substation environment, controlling the leakage current to <0.1mA, which significantly improves the safety factor compared to traditional bamboo ladder operations.

[0027] The clamp module 2 includes an elastic clamp 21, a top head 22, and an adjusting screw 23. The elastic clamp 21 is fixedly installed at the top of the telescopic pressure-resistant insulating tube 1, the top head 22 is fixedly installed at the upper end of the adjusting screw 23, and the adjusting screw 23 is installed in the screw hole at the top of the telescopic pressure-resistant insulating tube 1.

[0028] This embodiment uses an adjusting screw and elastic clamp to form a pressure closed loop, and achieves 10-50N linear pressure adjustment through the thread lead, so that the contact resistance fluctuation rate is compressed to ±3μΩ. The modular telescopic structure is adapted to equipment with different voltage levels. Operators can complete the clamping and positioning of Φ60-150mm tubular busbars on the ground, and the time required for a single operation is significantly shortened.

[0029] As a preferred embodiment, the outer wall of the telescopic pressure-resistant insulating tube 1 is covered with a corrugated pipe protective layer.

[0030] As a preferred embodiment, the withstand voltage rating of the telescopic withstand voltage insulating tube 1 is 15kV.

[0031] Example 2:

[0032] Please see Figure 2 This utility model provides a high-altitude loop resistance testing device, comprising:

[0033] The telescopic pressure-resistant insulating tube 1 is composed of multiple nested sections of epoxy fiberglass tubes with screw holes at the top. It uses multiple sections of epoxy fiberglass tubes (volume resistivity > 10¹²Ω·cm) and is designed with a withstand voltage rating of ≥10kV. It can form an effective insulation barrier in a 110kV substation environment, controlling the leakage current to <0.1mA, which significantly improves the safety factor compared to traditional bamboo ladder operations.

[0034] The device includes two clamp modules 2, symmetrically arranged at the top of the telescopic pressure-resistant insulating tube 1. Each module contains elastic clamping pieces 21, a top head 22, and an adjusting screw 23. The elastic clamping pieces 21 are fixedly mounted at the top of the telescopic pressure-resistant insulating tube 1, and the top head 22 is fixedly mounted on the upper end of the adjusting screw 23. The adjusting screw 23 is located in a screw hole at the top of the telescopic pressure-resistant insulating tube 1. The two elastic clamping pieces 21 are fixedly connected to form an M-shaped clamping piece.

[0035] This embodiment uses an adjusting screw and elastic clamp to form a pressure closed loop, and achieves 10-50N linear pressure adjustment through the thread lead, so that the contact resistance fluctuation rate is compressed to ±3μΩ. The modular telescopic structure is adapted to equipment with different voltage levels. Operators can complete the clamping and positioning of Φ60-150mm tubular busbars on the ground, and the time required for a single operation is significantly shortened.

[0036] As a preferred embodiment, the outer wall of the telescopic pressure-resistant insulating tube 1 is covered with a corrugated pipe protective layer.

[0037] As a preferred embodiment, the withstand voltage rating of the telescopic pressure-resistant insulating tube 1 is 20kV.

[0038] The above embodiments and accompanying drawings are only used to illustrate the technical solutions of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model. Other related technical structures not disclosed in detail in this utility model are existing technologies in the art.

Claims

1. A high altitude loop resistance test apparatus, characterized by, The utility model relates to a telescopic pressure-resistant insulation pipe, comprising: a clamping module, which comprises elastic clamping pieces, a top head and an adjusting screw rod, the elastic clamping pieces are fixedly arranged at the top end of the telescopic pressure-resistant insulation pipe, the top head is fixedly arranged at the upper end of the adjusting screw rod, and the adjusting screw rod is arranged in the screw hole at the top end of the telescopic pressure-resistant insulation pipe. The telescopic pressure-resistant insulation pipe is provided with a corrugated pipe protective layer on the outer wall.

2. The elevated loop resistance test apparatus of claim 1, wherein: The telescopic pressure-resistant insulation pipe has a pressure resistance of greater than or equal to 10 kV.

3. The elevated loop resistance test apparatus of claim 1, wherein: The clamping module has two symmetrically arranged clamping modules at the top end of the telescopic pressure-resistant insulation pipe.

4. The elevated loop resistance test apparatus of claim 1, wherein: ​

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