CN203732567U - Lightning arrester live-line test wiring clamp - Google Patents

Abstract

The utility model discloses a lightning arrester live-line test wiring clamp comprising an inner pipe, an outer pipe, a clamp mouth device, and a self-unlocking device. The outer pipe is disposed on the outer side of the inner pipe in a sleeved manner, and the self-unlocking device is disposed in an inner cavity of the inner pipe. The lightning arrester live-line test wiring clamp is advantageous in that the working efficiency of the live-line test of the lightning arrester can be improved, the leakage current across the grounding lead of the lightning arrester can be stably acquired, and the data accuracy of the live-line test of the lightning arrester can be improved.

Description

Surge arrester live test wiring pliers

technical field

The utility model relates to a leakage current measuring device, in particular to a lightning arrester live test wiring clamp. the

Background technique

Due to its flow characteristics, arresters are widely used in substations. The number of surge arresters installed in a 110kV and above voltage substation is often dozens or more. For the live test of the lightning arrester whose lead wire height is less than 1.8 meters, the personnel can directly complete the manual wiring work without the auxiliary wiring device. For live tests of surge arresters with a lead wire height greater than 1.8 meters, testers need to use auxiliary tools such as insulation ladders to complete the live test wiring work. To complete a live test of a surge arrester, the staff needs to go up and down the insulation ladder once. There is a huge safety hazard, and for To complete the lightning arrester live test task of a substation with a voltage level of 110kV and above, it is often necessary to move the insulating ladder dozens or even hundreds of times, which is heavy workload and low work efficiency. . the

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a device that is easy to operate and use, improves the working efficiency of the live test of the arrester, realizes stable acquisition of the leakage current flowing through the grounding lead of the arrester, and improves the accuracy of the live test data of the arrester. Surge arrester live test wiring pliers. the

A lightning arrester live test wiring pliers, including an inner tube, an outer tube, a jaw device, and a self-unlocking device. The outer tube is sleeved outside the inner tube, and the self-unlocking device is built in the inner cavity of the inner tube. 

The self-unlocking device includes an unlocking key, a mechanism bracket, a rack, an unlocking pawl and a pull rod, the unlocking key is embedded in the mechanism bracket, the unlocking key is set on the rack and drives the mechanism bracket to move, and one end of the unlocking key The other end of the unlocking key is connected with a pull rod, and the other end of the unlocking key is provided with a slope. The unlocking pawl is an elastic pawl. The claw is located on the slope of the unlocking key, and an energy storage spring is arranged on one end of the mechanism bracket, and the energy storage spring is connected with the wire rope in the jaw device.

The jaw device includes a slideway, an upper jaw, a lower jaw, a movable pulley, a fixed pulley and a return wheel. The upper jaw is arranged on the fixed pulley, and the lower jaw is arranged on the movable pulley. Equipped with a disk-type energy storage spring, the fixed pulley, movable pulley and return pulley are all set on the slideway, the return pulley and the fixed pulley are fixed on the upper and lower parts of the slideway, and the movable pulley is movable between the return pulley and the fixed pulley In the slideway between, the return wheel and the lower jaw are connected by a pull piece or a pull rope, and a steel wire rope is also included. One end of the steel wire rope is fixed to the fixed pulley, and the other end bypasses the movable pulley and the fixed pulley to form a pulley block. , the upper jaw and the lower jaw are in an open state under normal conditions;

The slideway is connected with the inner tube, one end of the outer tube is set on the inner tube, the other end of the outer tube is connected with an extension rod, and the pull rod of the self-unlocking device is connected with the extension rod;

A terminal is also provided on the slideway, and the terminal is electrically connected to the upper jaw.

The lightning arrester live test wiring pliers of the utility model, when needed to use, pull down the connecting rod, the connecting rod drives the outer tube to move, and the outer tube drives the pull rod connected to it to move, and the moving pull rod drives the mechanism bracket to move through the unlock key, thereby driving The movement of the steel wire rope connected to the energy storage spring on the mechanism bracket, after the movement of the steel wire rope, drives the movable pulley connected to it to move closer to the fixed pulley along the slideway, so as to drive the lower jaw set on the movable pulley to move closer to the upper The movement of the jaws is to realize the clamping of the upper and lower jaws. When the outer tube is released and pushed up, due to the action of the pull piece between the movable pulley and the return wheel and the disc energy storage spring on the return wheel, it will drive The lower jaw returns along the slideway, thereby realizing the opening of the upper and lower jaws. the

In summary, the utility model has the following advantages compared with the prior art:

The lightning arrester live test wiring clamp of the utility model can improve the work efficiency of the lightning arrester live test, realize the stable acquisition of the leakage current flowing through the grounding lead wire of the lightning arrester, and improve the accuracy of the live test data of the lightning arrester; When the connecting rod drives the outer tube to pull down, the outer tube drives the pull rod to move downward, and the moving pull rod drives the unlock key to move downward, so that the angle between the slope at the front end of the unlock key and the unlocking pawl becomes smaller. When the outer tube is pulled down to the position, The angle between the unlocking key and the unlocking pawl is 0 degrees, so that the unlocking pawl fully extends into the rack, and the rack is stuck so that the upper and lower jaws are firmly clamped. When the outer tube is pushed up , the pull rod drives the unlocking key to move upwards, and at this time, the slope of the unlocking key is lifted, so that the unlocking pawl is separated from the rack to realize unlocking.

Description of drawings

Figure 1 is a schematic diagram of the structure of the live test wiring clamp for the lightning arrester of the present invention. the

Fig. 2 is a schematic diagram of the self-unlocking device of the live test wiring clamp of the lightning arrester of the present invention. the

Fig. 3 is a schematic diagram of the jaws of the live test wiring pliers of the lightning arrester of the present invention. the

Figure 4 is a schematic diagram when the upper and lower jaws of the lightning arrester live test wiring clamp of the utility model are opened.

Explanation of symbols 1 Inner tube 2 Outer tube 3 Clamp nozzle device 31 Slideway 32 Upper jaw 33 Lower jaw 34 Moving pulley 35 Fixed pulley 36 Return wheel 37 Disc energy storage spring 38 Steel wire rope 39 Pull piece 4 Self-unlocking device 41 Unlocking key 42 Mechanism bracket 43 Rack 44 Unlock pawl 45 Pull rod 46 Energy storage spring 5 Extension rod 6 Terminal post. the

Detailed ways

Below in conjunction with embodiment the utility model is described in more detail. the

Example 1

A lightning arrester live test wiring pliers, including an inner tube 1, an outer tube 2, a jaw device 3, and a self-unlocking device 4, the outer tube is set outside the inner tube, and the self-unlocking device is built in the inner cavity of the inner tube,

The self-unlocking device includes an unlocking key 41, a mechanism bracket 42, a rack 43, an unlocking pawl 44 and a pull rod 45. The unlocking key is embedded in the mechanism bracket, and the unlocking key is set on the rack and drives the mechanism bracket Movement, one end of the unlocking key is connected with a pull rod, the other end of the unlocking key is provided with a slope, the unlocking pawl is an elastic pawl, one end of the unlocking pawl is connected to the pull rod, and the other end is stuck on the sawtooth of the rack Among them, and the unlocking pawl is located at the inclined plane of the unlocking key, an energy storage spring 46 is arranged on one end of the mechanism bracket, and the energy storage spring is connected with the wire rope in the jaw device,

The jaw device includes a slideway 31, an upper jaw 32, a lower jaw 33, a movable pulley 34, a fixed pulley 35 and a return pulley 36, the upper jaw is arranged on the fixed pulley, and the lower jaw is arranged on the movable pulley. , the disc type energy storage spring 37 is arranged in the return wheel, the fixed pulley, the movable pulley and the return wheel are all arranged on the slideway, the return wheel and the fixed pulley are fixed on the upper and lower parts of the slideway, and the movable pulley is movably arranged on the slideway. In the slideway between the return wheel and the fixed pulley, the return wheel and the lower jaw are connected by a pull piece 39, and a wire rope 38 is also included. One end of the steel wire rope is fixed on the fixed pulley, and the other end goes around the movable pulley, A pulley block is formed behind the fixed pulley, and the upper jaw and the lower jaw are in an open state under normal conditions;

The slideway is connected with the inner tube, one end of the outer tube is sleeved on the inner tube, the other end of the outer tube is connected with an extension rod 5, and the pull rod of the self-unlocking device is connected with the extension rod;

A terminal 6 is also arranged on the slideway, and the terminal is electrically connected to the upper jaw.

The parts not described in this embodiment are the same as the prior art. the

Claims (1)

1. A lightning arrester live test wiring pliers is characterized in that: comprise inner tube, outer tube, jaw device, self-unlocking device, outer tube is sleeved outside inner tube, and self-unlocking device is built in the inner cavity of inner tube, The self-unlocking device includes an unlocking key, a mechanism bracket, a rack, an unlocking pawl and a pull rod, the unlocking key is embedded in the mechanism bracket, the unlocking key is set on the rack and drives the mechanism bracket to move, and one end of the unlocking key The other end of the unlocking key is connected with a pull rod, and the other end of the unlocking key is provided with a slope. The unlocking pawl is an elastic pawl. The claw is located on the slope of the unlocking key, and an energy storage spring is arranged on one end of the mechanism bracket, and the energy storage spring is connected with the wire rope in the jaw device. The jaw device includes a slideway, an upper jaw, a lower jaw, a movable pulley, a fixed pulley and a return wheel. The upper jaw is arranged on the fixed pulley, and the lower jaw is arranged on the movable pulley. Equipped with a disk-type energy storage spring, the fixed pulley, movable pulley and return pulley are all set on the slideway, the return pulley and the fixed pulley are fixed on the upper and lower parts of the slideway, and the movable pulley is movable between the return pulley and the fixed pulley In the slideway between, the return wheel and the lower jaw are connected by a pull piece or a pull rope, and a steel wire rope is also included. One end of the steel wire rope is fixed to the fixed pulley, and the other end bypasses the movable pulley and the fixed pulley to form a pulley block. , the upper jaw and the lower jaw are in an open state under normal conditions; The slideway is connected with the inner tube, one end of the outer tube is set on the inner tube, the other end of the outer tube is connected with an extension rod, and the pull rod of the self-unlocking device is connected with the extension rod; A terminal is also arranged on the slideway, and the terminal is electrically connected to the upper jaw.