CN102882153B - Phase replacing insulator string method in charged for replacement circuit many times towers - Google Patents

Abstract

The invention discloses phase replacing insulator string method in a kind of charged for replacement circuit many times towers, method of the present invention, pulley jig is utilized to carry out replacing insulator string, achieve indirect operation to install, it transfers to ground stringing operation from tower, greatly reduce gap operating workload, improve operating efficiency, reduce labour intensity.

Description

Replacement method of phase insulator string in multi-circuit tower of live replacement line

technical field

The present invention relates to a replacement of phase insulator strings in double-circuit towers, in particular to a method for replacing phase insulator strings in multi-circuit towers for live replacement lines.

Background technique

As it becomes more and more difficult to requisition line corridors, a large number of power transmission lines use double-circuit or multi-circuit towers on the same tower. For example, the conductors of the 110KV line double-circuit straight towers are arranged vertically, and the middle phase cross arm and upper phase cross arm are generally 3.5 meters. After deducting the length of the insulator string and the height of the middle-phase cross-arm, the distance between the middle-phase cross-arm and the upper conductor is only about 1.2 meters. The gap cannot meet the safety requirements, and the operation can only be performed in a power outage, which causes a large loss of power supply and reduces the reliability of power supply.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for replacing phase insulator strings in multi-circuit towers of live replacement lines, which is applicable to the replacement of phase insulators in double-circuit towers or multi-circuit towers on ground potential live lines.

A method for replacing phase insulator strings in multi-circuit towers of live replacement lines. The specific steps are as follows: (1) Firstly, a pulley clamp and an insulating rope are formed into a pulley block. The pulley clamp specifically includes a clamp and two moving parts. The pulley block, the fixture is a wing-shaped structure, and the middle part of the wing-shaped structure is provided with an opening slit that communicates with the front and back of the fixture and can be snapped into the cross-arm, and an opening that extends along the direction of the two wings of the wing-shaped structure. A vertical square groove is slit. The notch of the square groove is located on the lower end surface of the fixture. Fixed pulley blocks are respectively arranged on the lower end surfaces of the two wings of the fixture. Each fixed pulley set has more than one fixed pulley. For lifting the lugs of the jig, the number of pulleys on each movable pulley block matches the number of fixed pulleys of the fixed pulley block on the side wing of the fixture, and a hook for lifting wires is provided at the bottom of each movable pulley block;

(2) The operators on the first tower climb to the end of the upper cross-arm, hang the pulley on the upper cross-arm, and the ground operators start to lift the pulley block from this pulley;

(3) The operator on the other tower climbs to the root of the middle cross arm and installs the pulley clamp on the insulator string suspension point at the end of the middle cross arm with the operating rod, so that the opening gap and square groove in the middle of the clamp are tightly fixed on the cross arm and hang the hooks of the two moving pulleys into the wire;

(4) Ground workers tighten the insulating rope from the end of the insulating rope of the pulley block to transfer the load of the insulator to the pulley block;

(5) Use the operating lever to remove the spring pin on the wire side and disengage the insulator;

(6) Install a good insulator according to the reverse steps, remove the operating tools, and evacuate the personnel.

The above method is mainly applicable to the replacement of composite insulators. In order to replace the porcelain insulators, the present invention also adds the following steps between steps 5 and 6: two operators go to the root of the middle phase cross arm, and use the operating lever to handle the The self-made lifting point card installed on the pulley rope is fixed on the upper end of the synthetic insulator, or the first piece of the porcelain insulator, adjust the position of the insulator with the insulator adjuster, remove the spring pin on the side of the cross arm, and use the insulator lifting point card to balance and lift the insulator string, disengage the ball joint connecting the insulator, and place the insulator to the ground.

Hanging lugs for hanging the starting pulley are arranged on the movable pulley.

Two fixed pulleys are also arranged on the jig between the two fixed pulley groups of the jig, and the two fixed pulleys are respectively arranged on the flanks on both sides of the opening slit.

A fixed pulley is added between the two fixed pulley blocks of the jig. When replacing the insulator of the porcelain bottle, since the weight of the insulator of the porcelain bottle is very heavy, the porcelain bottle can be lifted by the rope through the fixed pulley to reduce the weight.

The lifting point card is a hoop-type structure composed of two arc-shaped pieces. Lifting lugs are provided on the two arc-shaped pieces to facilitate lifting the lifting point card upwards. The lifting point card is also provided with a convenient insulation Operating ring for joystick operation.

When in use, use the insulating operating rod to clamp the lifting point card on the upper end of the insulator or the first piece of the porcelain insulator, and then use the insulating rope to fix the lifting point card through the lifting ear on the lifting point card.

In summary, compared with the prior art, the present invention has the following advantages:

(1) The method for replacing the phase insulator strings in the multi-return tower of the live replacement line of the present invention realizes indirect operation and installation. It transfers the line tightening operation from the tower to the ground, greatly reduces the workload of the gap operation, and improves the operation efficiency. Reduced labor intensity;

(2) According to the conventional operation method, the hanging point of the load-bearing tool and the hanging point of the insulator string need to be staggered by about 400mm. It is very difficult to install and remove the insulator string indirectly, and the labor intensity is extremely high. This method cooperates with the lifting point card and the pulley clamp. It realizes positioning installation and removal of insulators, and the operation is simple and fast, and it is also suitable for indirect loading and unloading of composite insulators and porcelain (glass) insulators;

(3) Two sets of load-bearing tools are used for operation. When any one of the tools fails, the other set of tools can still work normally, which greatly improves the operating safety factor;

(4) The working method studied in this project, the tools and tools are light and flexible, and the operation is simple;

Description of drawings

Fig. 1 is a schematic structural view of the jig according to Embodiment 1 of the present invention.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a schematic diagram of a pulley block composed of a pulley fixture and an insulating rope.

Fig. 4 is a schematic view of the pulley fixture in use according to Embodiment 1 of the present invention.

Fig. 5 is a schematic diagram of the structure of the lifting point fixture according to Embodiment 2 of the present invention.

FIG. 6 is a top view of FIG. 5 .

Reference Signs Explanation 1 pulley fixture 11 fixture 111 fixture clamped into the opening slit of the cross arm 112 square groove perpendicular to the opening slit on the fixture 12 movable pulley block 121 hook at the lower part of the movable pulley block 122 hanging lug of the movable pulley block 13 fixed pulley block 14 Hanging lug 2 insulating ropes 3 lifting point cards 31 lifting lugs 32 operating rings 4 crossarms on the lifting point cards at the upper end of the fixture.

Detailed ways

The present invention will be described in more detail below in conjunction with examples.

Example 1

A method for replacing phase insulator strings in multi-circuit towers of live replacement lines. The specific steps are as follows: (1) Firstly, the pulley fixture 1 and the insulating rope 2 are formed into a pulley block as shown in Figure 1-4. The specific steps of the pulley fixture are as follows: It includes a jig 11 and two movable pulley blocks 12. The jig is a wing-shaped structure, and an opening 111 that communicates with the front and back of the jig and can be snapped into the cross-arm 4 is arranged in the middle of the wing-shaped structure, and The square groove 112 extending along the direction of the two wings of the airfoil structure and perpendicular to the opening seam, the notch of the square groove is located at the lower end surface of the clamp, and fixed pulley blocks 13 are respectively arranged on the lower end surfaces of the two wings of the clamp, each fixed pulley block There is more than one fixed pulley, and the upper end of the fixture is provided with a hanging lug 14 for lifting the fixture. The number of pulleys on each movable pulley block matches the number of fixed pulleys on the fixed pulley block on the side wing of the fixture. The bottom of each moving pulley block is provided with a hook 121 for lifting the wire, and a hanging lug 122 for hanging the starting pulley block is arranged on the moving pulley block;

(2) The operators on the first tower climb to the end of the upper cross-arm, hang the pulley on the upper cross-arm, and the ground operators start to lift the pulley block from this pulley;

(3) The operator on the other tower climbs to the root of the middle cross arm and installs the pulley clamp on the insulator string suspension point at the end of the middle cross arm with the operating rod, so that the opening gap and square groove in the middle of the clamp are tightly fixed on the cross arm and hang the hooks of the two moving pulleys into the wire;

(4) Ground workers tighten the insulating rope from the end of the insulating rope of the pulley block to transfer the load of the insulator to the pulley block;

(5) Use the operating lever to remove the spring pin on the wire side and disengage the insulator;

(6) Install a good insulator according to the reverse steps, remove the operating tools, and evacuate the personnel.

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

Example 2

This embodiment is basically the same as Embodiment 1, except that the following steps are added after step 5 of Embodiment 1. The two operators go to the root of the middle phase cross-arm, and use the operating lever to lift the self-made lifting point mounted on the pulley rope. The card is fixed on the upper end of the synthetic insulator, or the first piece of the porcelain bottle insulator, and the lifting lug on the lifting point card is hung on the two fixed pulleys between the two fixed pulley blocks on the pulley fixture, and the position of the insulator is adjusted with the insulator adjuster , remove the spring pin on the side of the cross arm, use the insulator lifting point card as shown in Fig. The hoop-type structure composed of two arc-shaped pieces is provided with lifting lugs 31 which are convenient for lifting the lifting point card upwards, and an operating ring 32 which is convenient for operating with an insulating operating rod is also arranged on the lifting point card. Two fixed pulleys are also arranged between the two fixed pulley blocks of the jig, and the two fixed pulleys are respectively arranged on the flanks on both sides of the opening slit. The lifting point card is suspended on the two fixed pulleys by using the lifting lugs on it.

The parts not described in this embodiment are the same as those in Embodiment 1.

Claims (2)

1. A method for replacing phase insulator strings in multi-circuit towers of live replacement lines, characterized in that: the specific steps are as follows: (1) first, a pulley clamp and an insulating rope are formed into a pulley block, and the pulley clamp specifically includes a clamp and two movable pulley blocks, the clamp is an airfoil structure, and the middle part of the airfoil structure is provided with an opening slit that communicates with the front and rear of the clamp and can be inserted into the cross arm, and along the two side wings of the airfoil structure A square groove extending in the direction perpendicular to the opening seam. The notch of the square groove is located on the lower end surface of the fixture. Fixed pulley blocks are respectively arranged on the lower end surfaces of the two wings of the fixture. Each fixed pulley set has more than one fixed pulley. The upper end of the upper end is provided with hanging lugs for lifting the jig, the number of pulleys on each movable pulley block matches the number of fixed pulleys on the fixed pulley block on one side of the fixture, and the lower part of each movable pulley block is provided. the hook; (2) The operators on the first tower climb to the end of the upper cross-arm, hang the pulley on the upper cross-arm, and the ground operators start to lift the pulley block from this pulley; (3) The operator on the other tower climbs to the root of the middle cross arm and installs the pulley fixture at the suspension point of the insulator string at the end of the middle cross arm with the operating rod, so that the opening gap and square groove in the middle of the fixture are tightly fixed on the cross arm and hang the hooks of the two moving pulleys into the wire; (4) The ground operator tightens the insulating rope from the end of the insulating rope of the pulley block to transfer the load of the insulator to the pulley block; (5) Use the operating lever to remove the spring pin on the wire side and disengage the insulator; The two operators go to the root of the middle phase cross arm, and use the operating rod to fix the self-made lifting point card installed on the pulley rope to the upper end of the composite insulator, or the first piece of the porcelain bottle insulator, and adjust the position of the insulator with the insulator adjuster. Take off the spring pin on the side of the cross arm, use the insulator lifting point to balance and lift the insulator string, disengage the ball head connecting the insulator, put the insulator on the ground, and set the hanging lug for hanging the starting pulley on the moving pulley block. The jig between the two fixed pulley blocks is also provided with two fixed pulleys, and the two fixed pulleys are respectively arranged on the flanks on both sides of the opening; (6) Install a good insulator according to the reverse steps, remove the operating tools, and evacuate the personnel. 2. The method for replacing phase insulator strings in multi-circuit towers of live replacement lines according to claim 1, characterized in that: the lifting point card is a hoop-type structure composed of two arc-shaped sheets, and is mounted on two arc-shaped sheets. There are lifting lugs which are convenient for lifting the lifting point card upwards, and an operating ring which is convenient for operating with an insulating operating rod is arranged on the lifting point card.