CN-224216746-U - Test clamp for detecting cable insulativity

CN224216746UCN 224216746 UCN224216746 UCN 224216746UCN-224216746-U

Abstract

A testing clamp for detecting the insulation property of a cable is characterized in that an upper clamp body and a lower clamp body which are hinged in a rotating mode are arranged, a conductive contact seat and a probe connected with the conductive contact seat in a conductive mode are arranged in the lower clamp body, a connecting wire is connected to the rear end of the conductive contact seat, a movable poking assembly is arranged at the lower end of the probe, the poking assembly comprises a poking block, a compression spring and a guide sleeve fixedly arranged on the lower wall of the lower clamp body, the poking block is fixedly arranged at the rear end of the probe, the compression spring is connected between the guide sleeve and the poking block, the poking block penetrates through the lower clamp body downwards, the front end of the probe penetrates through the guide sleeve and moves back and forth synchronously with the poking block under the action of external force to extend out of the lower clamp body or retract into the lower clamp body, a surface wire is not required to be replaced in the testing process, the probe can be pushed out of the testing clamp, the time is greatly saved, the field operation is simpler and the testing clamp is low in risk of electric shock, the plugging reliability is simple in structure, and convenient to use.

Inventors

ZHANG JIE
WANG YUANYUAN
YANG YANG
Hou ao
GUO JIANGZHEN
MA ZILIANG
ZHOU JUNHONG

Assignees

河南送变电建设有限公司

Dates

Publication Date: 20260508
Application Date: 20250519

Claims (10)

1. The testing clamp for detecting the cable insulativity comprises an upper clamp body and a lower clamp body which are hinged in a rotating manner, and is characterized in that a conductive contact seat and a probe which is connected with the conductive contact seat in a conductive manner are arranged in the lower clamp body, the rear end of the conductive contact seat is connected with a connecting wire, and the lower end part of the probe is provided with a movable poking assembly; The poking assembly comprises a poking block, a compression spring and a guide sleeve, wherein the guide sleeve is fixedly arranged on the lower wall of the lower clamp body, the poking block is fixedly arranged at the rear end part of the probe, and the compression spring is connected between the guide sleeve and the poking block; the poking block penetrates through the lower clamp body downwards, and the front end of the probe penetrates through the guide sleeve and moves forwards and backwards synchronously with the poking block under the action of external force to extend out of the lower clamp body or retract into the lower clamp body.
2. The test clamp for detecting cable insulativity according to claim 1, wherein the bottom of the lower clamp body is provided with a guide notch, the bottom of the poking block penetrates out of the guide notch and is hinged with a positioning plate, and two ends of the guide notch are correspondingly and fixedly provided with limiting plates for limiting the movement of the probe.
3. The testing clamp for detecting the insulation property of the cable, as in claim 1, wherein the upper clamp body and the lower clamp body are hinged through a pin shaft, a first fixing cavity is formed in the upper clamp body, and a second fixing cavity is formed in the lower clamp body; The outside cover of round pin axle is equipped with the torsional spring, and torsional spring one end stretches into in the first fixed cavity and butt on the inside wall of first fixed cavity, and the torsional spring other end stretches into in the second fixed cavity and butt on the inside wall of second fixed cavity.
4. The test clip for detecting cable insulation as in claim 1, wherein the front end of the lower clip body is provided with a through hole for a probe to pass through.
5. The test clip for detecting cable insulation as recited in claim 2, wherein the positioning plate is an L-shaped plate.
6. The test clamp for detecting cable insulativity according to claim 2, wherein the poking block, the positioning plate and the limiting plate are made of insulating materials.
7. The test clip for detecting cable insulation according to any one of claims 1 to 6, wherein the front ends of the upper clip body and the lower clip body are further provided with clip openings.
8. The test clip for detecting cable insulation as recited in claim 7, wherein the outer parts of the upper clip body and the lower clip body are respectively covered with an insulating sheath.
9. A test clip for detecting insulation of a cable as set forth in claim 2, wherein said guide notch is a rectangular slot.
10. The test clip for detecting cable insulation as recited in claim 7, wherein the conductive contact base is a copper contact base.

Description

Test clamp for detecting cable insulativity Technical Field The utility model belongs to the technical field of cable detection, and particularly relates to a test clamp for cable insulation detection. Background The insulating property of the cable refers to the ability of wrapping a certain material outside the cable to prevent leakage, discharge and isolation of electrical energy from the wires. The cable insulation test is classified into (1) insulation to ground, (2) insulation to phase, wherein insulation to ground detection refers to a process of measuring insulation resistance between a cable and the ground (or an uncharged equipment housing), and insulation to phase detection refers to a process of measuring insulation resistance between cable cores. Because the number of cables is numerous, the wiring mode is complicated, the time spent in the insulation test process can be influenced to a certain extent, and the construction progress is further influenced, the link has a critical influence on whether the power can be smoothly supplied to projects such as power reconstruction and expansion substations, technical improvement projects, maintenance projects and the like. At present, the cable insulation testing process mainly comprises power-off measurement and tool replacement steps, wherein the tool replacement steps have the following characteristics: (1) The cable is subjected to a ground insulation test, the ground insulation test needs to be carried out on the cable, the ground insulation test is carried out on the cable, the inter-phase insulation test is carried out after the ground insulation test is finished, the inter-phase insulation test needs to be carried out on the cable, namely the cable with the test clamp needs to be replaced by the cable with the probe, and the time consumption of the whole test process is directly influenced by the time consumption of the step; (2) The pointer is replaced, and the pointer is replaced to different terminals when the insulation of the cable is measured every time. In the cable insulation test process, two operation modes of replacing the whole surface wire or only replacing the test clamp are generally adopted, and the two modes are different in cost, number of matched people, plugging speed and reliability through investigation. The mode of changing the test clamp is simple and convenient to operate, the test clamp is replaced by the probe, the speed is high, the accessory is light, but the probe is too small when in work, the hand is inconvenient to hold, the electric shock risk is high, and the plugging reliability is low. The mode of changing whole table line needs to prepare in advance to accord with the table line of instrument jack, and change speed is slower, and the electric shock risk is lower, and grafting reliability is higher. Therefore, the design of the test clamp for the existing detection instrument is unreasonable, so that the time for replacing the meter wire is long, the test time is long, and the structure of the existing test clamp needs to be improved. Disclosure of Invention The utility model aims to overcome the defects in the prior art and provide a testing clamp for detecting cable insulativity, which improves operability and saves detection time. In order to solve the technical problems, the utility model adopts the following technical scheme: The testing clamp for detecting the cable insulativity comprises an upper clamp body and a lower clamp body which are hinged in a rotating manner, wherein a conductive contact seat and a probe which is connected with the conductive contact seat in a conductive manner are arranged in the lower clamp body, the rear end of the conductive contact seat is connected with a connecting wire, and the lower end part of the probe is provided with a movable poking assembly; The poking assembly comprises a poking block, a compression spring and a guide sleeve, wherein the guide sleeve is fixedly arranged on the lower wall of the lower clamp body, the poking block is fixedly arranged at the rear end part of the probe, and the compression spring is connected between the guide sleeve and the poking block; the poking block penetrates through the lower clamp body downwards, and the front end of the probe penetrates through the guide sleeve and moves forwards and backwards synchronously with the poking block under the action of external force to extend out of the lower clamp body or retract into the lower clamp body. The bottom of the lower clamp body is provided with a guide notch, the bottom of the poking block penetrates out of the guide notch and is hinged with a positioning plate, and two ends of the guide notch are also correspondingly and fixedly provided with limiting plates for limiting the movement of the probe. The upper clamp body is hinged with the lower clamp body through a pin shaft, a first fixing cavity is formed in the upper clamp body, and a second fixing cavity is formed in the lo