CN101546894A - Method for replacing 220KV steel pipe tower composite insulator electrifiedly - Google Patents

Abstract

The invention discloses a method for replacing a composite insulator of a steel pipe tower of a 220KV high-voltage transmission line with electricity. It belongs to the field of electrical technology. The tools used are: a set of lifting tools: including clamps for fixing the cross arm, lead screws, insulating hooks, sickle guns and pin removers; auxiliary tools: insulating ropes and backup protection ropes; Rooting on the cross arm, using a single lifting point for live work. The beneficial effects of the invention are: the problem of narrow working space of the steel pipe tower is overcome, only two operators are required to work on the tower;

Description

The Method of Replacing the Composite Insulator of 220KV Steel Pipe Tower with Electricity

technical field

The invention relates to a method for replacing a synthetic insulator of a steel pipe tower of a 220KV high-voltage transmission line with electricity. It belongs to the field of electrical technology.

Background technique

With the continuous strengthening of urban electricity load, 220KV substations have appeared in urban areas of major cities one after another. In order to save land in urban areas, steel pipe towers are used for outgoing lines of 220KV substations in urban areas. At the same time, in order to save line channels, the steel pipe tower often adopts the method of multiple circuits on the same tower. The working space on the steel pipe tower is too narrow, which brings inconvenience to the maintenance work of the steel pipe tower line.

The composite insulator of the high-voltage transmission line is suspended on the transmission line tower, and is connected with the cross arm and wire of the steel pipe tower through the ball end and bowl head composite insulator. The composite insulator has high electrical and mechanical strength, which ensures the reliable operation of the transmission line. Due to lightning strikes, pollution flashover, deterioration and other reasons during operation, it needs to be replaced at any time. In order not to cut off the line power due to the replacement of insulators, it is necessary to carry out live work on the high-voltage transmission line. The current method of live insulator replacement is: the workers directly contact the high-voltage wires or use insulation tools to perform operations, and replace the deteriorated synthetic insulators. , a kind of intermediate insulation must be used, and a special clamp with a tightening device at both ends, the purpose is to transfer the tension of the wire to the lifting tool, so that the composite insulator can be pulled from the tensioned state (due to the weight of several tons of the suspended wire, the insulator The string is in a state of tension) to a state of slack. Because the structure of the steel pipe tower is different from that of conventional towers, the lifting tools on the cross arm cannot be rooted. At the same time, the cross arm of the steel pipe tower is too narrow, and only one person can operate on the tower, and one person can assist, so the replacement operation cannot be completed.

Contents of the invention

In order to solve the above-mentioned technical problems, the present invention provides a method for live replacement of composite insulators of 220KV steel pipe towers. This method adopts a new clamp to root on the cross arm and uses a single lifting point for live work. Solved the problem of nowhere to take root on the steel pipe tower.

The present invention is realized by the following technical scheme: a method for replacing the composite insulator of a 220KV steel pipe tower with electricity, the tools used include: a set of lifting tools: including a cross-arm fixing fixture, a tightening labor-saving lead screw, and an insulating hook sickle gun And remover; Auxiliary tools: insulating rope and backup protection rope, etc.

The specific replacement method steps are as follows:

1. Enter the cross-arm side: the operating electrician on the tower and the auxiliary electrician on the tower enter the cross-arm side in turn;

2. Lifting and installing tools: the electrician on the ground sends the tools to the side of the cross arm in turn through the insulating transmission rope, and the auxiliary electrician on the tower passes the tools one by one to the operating electrician, and the operating electrician installs the tools; the operating electrician passes the clamps first Hang the plate, insert the bolt at the lower end of the fixture, then insert the lead screw into the lead screw installation hole of the fixture, then connect the insulating hook and sickle gun, and connect the lower end of the lead screw with screws;

4. Tighten the lead screw: the operating electrician starts to tighten the lead screw after the two insulating hooks of the insulating hook gun hook the wire, so that the load on the synthetic insulator to be replaced is transferred to the whole set of lifting tools;

5. Picking screws: After the lead screw is tightened, the electrician operating on the tower starts to pull out the spring pin at the ball head of the lower end of the composite insulator with a pin remover, so that the ball head is separated from the bowl head; Pull up the lower end of the insulator, and remove the connection between the upper end and the hanging plate;

6. Drop the old synthetic insulator and lift the new synthetic insulator: the ground personnel loosen the old synthetic insulator to the ground through the insulation transfer rope, and lift the new synthetic insulator to the cross arm;

7. Install the new synthetic insulator: the electrician operating on the tower first connects the upper end of the new synthetic insulator to the hanging plate, and then straightens the bowl head through the bowl head centralizer, so that the ball end of the lower end of the synthetic insulator enters the bowl head, and then uses the pin remover Insert the spring pin;

8. Removal of working tools: The operating electrician on the tower removes the working tools in turn, and the auxiliary electrician on the tower loosens the tools to the ground through the insulating transmission rope.

The beneficial effects of the present invention are: (1) overcome the problem of the narrow working space of the steel pipe tower, only two workers are required to work on the tower; easy.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

Figure 1 is the overall layout of the tool;

Fig. 2 is the front view of fixture;

Fig. 3 is a plan view.

In the figure: 1. Steel pipe tower cross arm, 2. Hanging plate, 3. Cross arm fixing fixture, 3-1. Lead screw installation hole, 3-2. Bolt hole, 3-3. Installation clearance, 4. Bolt, 5. Lead screw, 6. Synthetic insulator, 7. Insulation hook gun and pin remover, 8. Ball head, 9. Bowl head, 10. Lead wire, 11. Screw rod and U-shaped hanging ring.

Detailed ways

As shown in the overall layout of the tool in Figure 1, the tools used include a set of lifting tools, a set of cross-arm fixing fixtures 3, a lead screw 5, an insulating hook and sickle gun 7, and a pin remover; auxiliary tools include insulating ropes and backup protection ropes.

As shown in Fig. 2 and Fig. 3, the jig fixed by the cross arm is in the shape of a bent L as a whole, and there is a screw mounting hole 3-1 at the end of the horizontal part, and there is a mounting gap 3 in the bent part -3 and bolt holes 3-2 through the mounting clearance.

First, the operator on the tower inserts the installation gap 3-3 of the cross-arm fixing jig 3 into the hanging board 2, and the corner of the cross-arm fixing jig 3 rests on the screw rod and U-shaped hanging ring 11 connected with the hanging board 2 , and then install bolt 4. Leading screw 5 is passed through the leading screw mounting hole 3-1 in the jig again, and finally the lower end of leading screw 5 and the upper end of insulating hook sickle gun 7 are connected together by bolts. After the tool has been assembled, the two hooks at the lower end of the insulating hook gun 7 are hooked to the two split conductors 10, then the leading screw 5 is lifted slowly, and the load that the composite insulator 6 is borne is transferred to the insulating hook gun 7. After the composite insulator 6 no longer bears the load, pull out the spring pin between the ball head 8 and the bowl head 9 with a pin remover, and shake the composite insulator 6 to make the ball head 8 escape from the bowl head 9. Then the connection between the composite insulator and the hanging board was removed, that is, the old composite insulator was replaced. When installing a new composite insulator, after the composite insulator and the hanging plate are connected, use the bowl head 9 centralizer to straighten the bowl head 9, so that the ball head 8 enters the bowl head 9, and then use the pin remover to install the spring pin into the ball head 8 and bowl head 9, promptly finished whole replacement operation.

Claims (1)

1, a kind of method of charged for replacement 220KV steel tube tower synthetic insulator is characterized in that the instrument that is adopted has: lifting tool one cover: comprise the cross-arm fixedly jig of usefulness (3), leading screw (5), insulation spear with hooked sickle and split-pin device (7); Aid: insulation ropes and backup protection rope etc.; The jig integral body that is adopted is the L shaped of bending, and a leading screw installing hole (3-1) is arranged in the termination of its horizontal position, assemblage gap (3-3) is arranged and pass the bolt hole (3-2) of assemblage gap at the bending part of perk;

Concrete replacing method is:

1) enter the cross-arm side: operation electrician and Ta go up auxiliary electrician and enter the cross-arm side successively on the tower;

2) lifting, erecting tools: the ground electrician transmits rope by insulation instrument is delivered to the cross-arm side successively, and auxiliary electrician passs the operation electrician one by one with instrument on the tower, carries out the installation of instrument by the operation electrician; The operation electrician passes link plate with jig earlier, and the jig lower end penetrates bolt, then leading screw is penetrated in the leading screw installing hole of jig, connects the insulation spear with hooked sickle subsequently, and the leading screw lower end connects with screw;

4) tighten up leading screw: the operation electrician waits to insulate and begins to tighten up leading screw after lead is hooked in two insulation of spear with hooked sickle, and the loading on the synthetic insulator to be replaced is transferred on a whole set of lifting tool;

5) pluck screw: the operation electrician treats to begin after leading screw tightens up with split-pin device the spring catch at bulb place, synthetic insulator lower end to be extracted on the tower, and bulb is separated with the bowl head; Then the operation electrician comes the pull-up of synthetic insulator lower end with the insulation rope on the tower, and extracts being connected of upper end and link plate;

6) fall old synthetic insulator, lift by crane new synthetic insulator: the ground staff transmits rope by insulation old synthetic insulator is unclasped ground, new synthetic insulator is worked winching to the cross-arm place;

7) new synthetic insulator is installed: the operation electrician links the upper end and the link plate place of new synthetic insulator earlier on the tower, then by ball socket adjuster the bowl head is set upright, and makes synthetic insulator lower end bulb enter a bowl head, with split-pin device spring catch is packed into subsequently;

8) remove power tool: the operation electrician removes power tool successively on the tower, and auxiliary electrician transmits the rope pine to ground with instrument by insulation on the tower.

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