CN203705482U - Dedicated wiring clamping tool for testing insulating property of lightning arrester - Google Patents

Abstract

The utility model relates to a live-testing auxiliary wiring tool for power, and specifically relates to a dedicated wiring clamping tool for testing the insulating property of a lightning arrester. The structural main points of the clamping tool lie in that the lower end of a fixed clamp is fixedly connected with an insulating rod; a supporting cross shaft is fixedly connected with the fixed clamp in a vertical manner; the lower side part of a movable clamp is hinged to the supporting cross shaft through a connecting piece; the tail end part of the movable clamp is connected with the fixed clamp through a spring; the length of the spring is less than the distance between the fixed and movable clamps on the supporting cross shaft; the fixed and movable clamps are in a clamp-mouth structure which becomes large gradually from the tail to the top after the spring is connected; and the opposite side surfaces of the fixed and movable clamps are uniformly provided with sawtooth strips in clamp mouths. The clamping tool provided by the utility model is simple in structure, is convenient in operation, can effectively reduce the workload of the live-testing wiring of insulating property of the lightning arrester, is in favor of steadily obtaining the leakage current passing through a down conductor of the lightning arrester, and improves the accuracy of live testing of the lightning arrester.

Description

Lightning arrester insulation performance test wiring special fixture

technical field

The utility model relates to a live test auxiliary wiring tool for electric power, in particular to a special fixture for testing the insulation performance of lightning arresters.

Background technique

Surge arresters are widely used in substations due to their flow characteristics. 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 Completing the lightning arrester live test task of a 110kV and above voltage level substation often requires moving the insulating ladder dozens or even hundreds of times. The operation is cumbersome, the workload is heavy, and the work efficiency is low.

Contents of the invention

The purpose of the utility model is to provide a special fixture for testing the insulation performance of lightning arresters with simple operation, low workload and high work efficiency according to the shortcomings of the prior art.

The purpose of this utility model is achieved by the following approach:

The special fixture for lightning arrester insulation performance test wiring, its structural key points are that it includes fixed jaw pliers, movable jaw pliers, insulating rod, supporting horizontal shaft and spring; the lower end of the fixed jaw pliers is fixedly connected with the insulating rod, and the supporting horizontal shaft is installed It is in the lower half of the fixed jaw pliers, and is vertically fixedly connected with the fixed jaw pliers; the lower side of the movable jaw pliers is hinged with the supporting horizontal shaft through the connecting piece, and the tail end of the movable jaw pliers is connected with the spring through the The fixed jaw pliers are connected, and the length of the spring is less than the distance between the fixed jaw pliers and the movable jaw pliers on the supporting horizontal axis. After the spring is connected, the fixed jaw pliers and the movable jaw pliers open gradually from the tail end to the top. Large jaw structure, in the jaw, there are serrated bars distributed on the opposite sides of the fixed jaw pliers and movable jaw pliers.

The length of the spring should satisfy that the maximum width of the jaws is greater than the width of the fixing nut of the grounding down conductor of the lightning arrester. The movable jaw pliers can rotate clockwise or counterclockwise around the hinge point between it and the supporting horizontal axis. When the rotation makes the tail end close to the fixed jaw pliers, the spring is compressed, indicating that the jaws are opened (the movable jaws The head of the pliers is far away from the head of the fixed jaw pliers), and after the external force is removed, it returns to its original shape under the elastic force of the spring. When in use, drive the insulating rod so that the fixing nut of the grounding down conductor of the arrester is located at the opening of the pliers mouth, push the insulating rod so that the fixing nut moves relatively to the rear end of the pliers mouth until the width of the pliers mouth is smaller than the width of the fixing nut and needs to be opened Pliers mouth, by keeping the movable jaw pliers away from the fixed jaw pliers, the spring compresses to spread the pliers mouth, but under the limitation of external force and spring compression, the fixed nut will be clamped by the pliers mouth. At this time, the sawtooth bar in the pliers will pierce the oxide film of the fixing nut of the grounding down conductor of the arrester, so that the leakage current flowing through the grounding down conductor of the arrester will pass through the fixing nut of the grounding down conductor of the arrester, the fixed jaw pliers, and The leading test wire flows into the live test device for the insulation performance of the arrester to realize the test. The utility model has the advantages of simple structure and convenient operation, which can effectively reduce the workload of live test wiring of the insulation performance of the arrester, facilitate stable acquisition of leakage current flowing through the grounding down conductor of the arrester, and improve the accuracy of live test data of the arrester.

The utility model can be further specifically described as:

The connecting piece is either a pin or an adjustable screw.

The connecting piece is used as the hinged part of the movable jaw pliers and the support horizontal shaft, and various existing connecting pieces can be selected for use.

It also includes a wiring ring installed on the outer surface of the fixed jaw pliers.

When in use, the test wire can be fixed in the wiring ring, so as to lead the leakage current of the grounding down conductor of the arrester.

To sum up, the utility model provides a special fixture for testing the insulation performance of lightning arresters. The leakage current improves the accuracy of the live test data of the arrester.

Description of drawings

Fig. 1 is a structural schematic diagram of the special fixture for testing the insulation performance of the lightning arrester described in the present invention.

Below in conjunction with embodiment the utility model is described further.

Detailed ways

Best practice:

Referring to Figure 1, the special fixture for testing the insulation performance of lightning arresters includes a fixed jaw pliers 1, a support horizontal shaft 2 is fixedly connected to the fixed nose pliers 1 at 90 degrees perpendicular to it, and the movable jaw pliers 4 is connected to the support horizontal shaft through an adjustable screw 3 2 connection, the tail end of the movable jaw pliers 4 is fixedly connected to one end of the spring 5, the other end of the spring 5 is fixedly connected to the inner side of the fixed jaw pliers 1, the wiring ring 6 is fixedly connected to the outer side of the fixed jaw pliers 1, and the fixed jaw The tail end of the pliers 1 is fixedly connected with the insulating rod 7; when the movable jaw pliers 4 rotates clockwise around the adjustable screw 3, the tail end of the movable jaw pliers 4 compresses the spring 5, and the spring 5 is compressed to store energy; the spring 5 returns Push the tail end of the movable jaw pliers 4 at the same time, so that the movable jaw pliers 4 rotate counterclockwise around the adjustable screw 3 and return to normal.

When using the special fixture for testing the insulation performance of lightning arresters, put the fixing nut of the grounding down conductor of the lightning arrester into the opening between the fixed jaw pliers 1 and the movable jaw pliers 4, and the external force acts on the tail end of the insulating rod 7 to push forward , when the space between the fixed jaw pliers 1 and the movable jaw pliers 4 is smaller than the diameter of the fixing nut of the grounding down conductor of the arrester, the fixed jaw pliers 1 and the movable jaw pliers 4 clamp the fixing nut of the grounding down conductor of the arrester At this time, the sharp serrations on the inside of the fixed jaw pliers 1 and the movable jaw pliers 4 will pierce the oxide film of the fixing nut of the grounding down conductor of the arrester, so that the leakage current flowing through the grounding down conductor of the arrester will pass through the grounding conductor of the arrester. The off-line fixed nut, fixed jaw pliers 1, wiring ring 6 and test line flow into the lightning arrester insulation performance live test device. During the above process, the movable jaw pliers 4 rotates clockwise around the adjustable screw 3 and compresses the spring 5, and the spring 5 is compressed to store energy. After the live test of the insulation performance of the arrester is completed, an external force acts on the tail end of the insulating rod 7 to push it away, so that the fixing nut of the arrester grounding down-conductor is separated from the fixed jaw pliers 1 and the movable jaw pliers 4, and then the spring 5 is in its Push the tail end of the movable jaw pliers 4 during the return process, so that the movable jaw pliers 4 rotate counterclockwise around the adjustable screw 3 to return to normal.

The undescribed part of the utility model is the same as the prior art.

Claims (3)

1. lightning arrester insulation performance test wiring unit clamp, is characterized in that, includes fixing dop pincers, movable dop pincers, insulating bar, support transverse axis and spring; The lower end of fixing dop pincers is fixedly connected with insulating bar, supports transverse axis and is arranged on the Lower Half position of fixing dop pincers, and clamp vertical being fixedly connected with fixing dop; The following side of movable dop pincers is hinged with support transverse axis by web member, and the tail end of movable dop pincers is by spring and fixing dop clipper joint, the length of spring is less than the distance of fixing on support transverse axis between dop pincers and movable dop pincers, after spring connects, fixing dop pincers and movable dop clamp be to top by tail end opening gradually large jaw construct, in jaw, the side in opposite directions of fixing dop pincers and movable dop pincers is distributed with Saw blade.

2. lightning arrester insulation performance test wiring unit clamp according to claim 1, is characterized in that, described web member or be a kind of latch, or be a kind of expansion screw.

3. lightning arrester insulation performance test wiring unit clamp according to claim 1, is characterized in that, also includes a connecting ring, and it is arranged on the lateral surface of fixing dop pincers.