CN-121983880-A - Live working is with changing strain insulator string frock

Abstract

The invention belongs to the technical field of operation and maintenance of extra-high voltage transmission lines, and particularly relates to a tool for replacing a tension insulator string for live working, which comprises a large cutter clamp front clamp, a large cutter clamp rear clamp, a wire tightening screw rod and a wire tightening pull rod, and is characterized in that a fixed pulley for suspending a bottle supporting frame is arranged on the large cutter clamp front clamp, a T-shaped pulley frame is arranged on the large cutter clamp rear clamp, and two guide wheels are arranged on the T-shaped pulley frame; an adjusting thread sleeve is arranged on the wire tightening pull rod at the front clamping side of the large knife clamp, the adjusting thread sleeve is propped against the hinging seat on the front clamping of the large knife clamp, and a supporting movable block is arranged in the groove. The invention has the advantages that the insulator string can be conveniently put down by means of the transmission rope, the support movable block with the eccentric hole can adapt to the connection plate types of various plate insulator strings, the application range is wider, the length of the installation position of the tightening pull rod can be adjusted by adjusting the threaded sleeve, the operation efficiency is improved, and the hinge seat is favorable for realizing the adjustment of the fine adjustment swing angle of the tightening pull rod under the high-altitude equipotential, so that the operation is more convenient.

Inventors

• LIU BINGCHU
• WANG BIN
• Ge Quanqing
• Geng Jiayao
• TONG MING
• FU SHAOPENG
• LIANG JIAN
• MA LIANRUI
• HAN XINYU
• LIU SIYU
• LI WANLIANG
• ZHANG TIANYANG

Assignees

• 国网辽宁省电力有限公司鞍山供电公司

Dates

Publication Date

20260505

Application Date

20251231

Claims (10)

1. 1. The tool for replacing the tension insulator string for live working comprises a front large cutter clamp, a rear large cutter clamp, a wire tightening lead screw and a wire tightening pull rod, wherein the front large cutter clamp is connected with an L-shaped linkage plate on the tension side, the rear large cutter clamp is connected with the L-shaped linkage plate on the suspension side, the front large cutter clamp is connected with the rear large cutter clamp through the wire tightening pull rod, the wire tightening lead screw is arranged on the wire tightening pull rod, the bottle supporting frame is connected with the rear large cutter clamp through a connecting screw, the front large cutter clamp is connected with the L-shaped linkage plate on the tension side through a groove matched with the L-shaped linkage plate on the tension side, the wire tightening lead screw is arranged on the wire tightening pull rod on the rear large cutter clamp, a fixed pulley used for hanging the bottle supporting frame is arranged on the front large cutter clamp, a T-shaped pulley frame is arranged on the rear large cutter clamp, a guide block is arranged on the T-shaped pulley frame and is arranged below the rear large cutter clamp, the front large cutter clamp is connected with the L-shaped linkage plate on the suspension side through a supporting pin roll, and the front large cutter clamp is connected with the large cutter clamp through a pin joint seat, and the front large cutter clamp is connected with the large cutter clamp through a supporting pin.
2. 2. The tool for replacing tension insulator strings for live working according to claim 1, wherein the supporting movable block is a rectangular cylindrical high-strength alloy steel piece with a middle hole, and the middle hole is eccentrically arranged and is sequentially 13mm, 15mm, 17mm and 20mm from four sides respectively.
3. 3. The tool for replacing the tension insulator string for live working, which is disclosed in claim 1, is characterized in that the tightening screw rod is in an outer tightening mode, the tightening screw rod is hinged with the tightening pull rod, and the connecting part is folded when being stored.
4. 4. The tool for replacing the tension insulator string for live working of claim 1, wherein the T-shaped pulley frame comprises a frame body, guide wheels and quick-release pins, the two guide wheels are connected with the frame body through wheel shafts, bearings are arranged between the wheel shafts and the guide wheels, 2-4 quick-release pins are arranged on the outer sides of the two guide wheels, and a transmission rope channel is arranged between the quick-release pins and the guide wheels.
5. 5. The tooling for replacing tension insulator strings for live working according to claim 1, wherein the applicable L-shaped yoke plates are L-1040, L-1240, L-1640 and L-2140.
6. 6. The tool for replacing the tension insulator string for live working of claim 1, wherein the hinging seat comprises a circular sleeve, trunnions and a sealing plate, the two trunnions are symmetrically arranged on the outer surface of the circular sleeve in a left-right mode, the central lines of the two trunnions are coaxial, the circular sleeve is arranged in a mounting hole of a front clamp of a large cutter clamp, the trunnions are embedded in clamping grooves on the inner wall of the mounting hole, the opening of each clamping groove is sealed by the sealing plate and a screw, and when the tool is in use, the central lines of the two trunnions are in a vertical state.
7. 7. The tool for replacing tension insulator strings for live working according to claim 1, wherein the adjusting threaded sleeve comprises an inner sleeve and an outer sleeve, the inner sleeve and the outer sleeve are movably connected through threads, and the inner sleeve is connected with a positioning hole of a wire tightening pull rod through a bolt.
8. 8. The live working strain insulator string replacement tool of claim 7, wherein the length of the inner sleeve is not less than 100mm.
9. 9. The tool for replacing tension insulator strings for live working according to claim 7, wherein the number of the positioning holes is 8-20, and the spacing is 30-50mm.
10. 10. The tool for replacing tension insulator strings for live working according to claim 1, wherein an inner concave spherical groove is formed in the joint of the wire tightening screw rod and the large cutter rear clamp, the diameter of the inner concave spherical groove is 65mm, and the spherical diameter is 60mm.

Description

Live working is with changing strain insulator string frock Technical Field The invention belongs to the technical field of operation and maintenance of extra-high voltage transmission lines, and particularly relates to a tool for replacing a strain insulator string for live working. Background In the power system, a power transmission line refers to a power facility used for connecting a power plant (or a power station) with a transformer substation and connecting the transformer substation with the transformer substation in the power system to realize long-distance and large-capacity transmission of electric energy, and is a key channel for transmitting the electric energy from a production end to a consumption end and is also a core component of a power grid. The strain insulator string is a common insulator combination form of an overhead transmission line, is a special insulator for a strain insulator tower (such as a line corner, a terminal and a tower at a section) in the transmission line, is one of important types of insulators, and has the core functions of transmitting and bearing the tension of a wire while realizing the insulation of the wire and the tower, and ensuring the structural stability of the line in steering or the terminal. The strain insulator string bears the tension of a wire for a long time, and under the influence of high-voltage current and natural environment change, the condition of reduced insulating performance caused by surface dirt, aging, cracks and the like or the hidden trouble of mechanical damage such as damage, steel foot corrosion, hardware fitting looseness and the like can occur. The invention patent application No. 20241957030. X discloses a large-blade clamp for replacing an LF type yoke plate insulator string, which comprises an LF type yoke plate insulator string component to be replaced and a large-blade clamp clamped on the LF type yoke plate insulator string component, wherein the large-blade clamp comprises a front clamp, a rear clamp, a screw rod component and an insulating pull plate, the front clamp is arranged on an equipotential side yoke plate, the rear clamp is arranged on a ground potential side yoke plate, the front clamp and the rear clamp are connected and tensioned through the screw rod component and the insulating pull plate so as to relieve tension at two ends of the insulator string, the insulator is convenient to remove and replace by an operator, and acting force in situ on the insulator is transferred to the clamp through the large-blade clamp. When the clamp is used for dismantling the insulator string, three defects exist, namely, firstly, a transmission rope is required to be transferred to a position above a hanging point close to the insulator string, an operation space is reserved, in the process of installing a new insulator string, the maximum height of the insulator required to be transferred is higher than that of a ball head hanging ring, the operation space is not enough, the operation is difficult to operate, secondly, in the prior art, a plurality of groups of insulators can be finely adjusted in high altitude, the lengths of the insulator strings 16 are different due to different numbers of insulator sheets in the new and old lines, the length of the insulator strings can be adjusted in the working process, but the length of the insulator strings can be adjusted in the working process, the length of the insulator strings is approximately adjusted under a tower, the insulator strings are locked, the insulator strings are transmitted to the working position on the tower through the transmission rope 15, the length deviation is too large, the operation is influenced, if the length of the insulator pull rod is excessively reserved, the insulator string tightening screw is required to be adjusted on the line for many times, the high-altitude operation difficulty is high, and the physical consumption of operators is high, and the potential safety hazard exists. 3. The supporting point structure of the fixture is required to correspond to the applicable yoke plate model, and if the angles of the supporting positions are inconsistent, the tool can be seriously worn, and even scrapped in advance. Disclosure of Invention The invention aims to overcome the defects of the prior art by using a tool for replacing a tension insulator string in live working, wherein high-position hanging points of a transmission rope are respectively added on a front large cutter clamp and a rear large cutter clamp, so that the insulator string is conveniently put down, supporting movable blocks are respectively arranged on the front large cutter clamp and the rear large cutter clamp, so as to adapt to the types of connecting plates of various plates of the insulator string, and an adjusting nut sleeve is additionally arranged on a wire tightening pull rod to quickly adjust the length of an installation position, so that the structure is more reasonable,