CN102646945B - Method for 500kV live replacement of composite insulators - Google Patents

Abstract

The invention relates to a method for replacing composite insulators with 500kV electrification, which comprises the following steps: ①installing a secondary protector; ②installing an adjustable suspension hook; ③replacing the insulator. ④Install the second adjustable suspension hook. The method for replacing synthetic insulators at 500kV live in the present invention is not limited by the tower type or the length of the insulators, and can realize live replacement of synthetic insulators of different models and whose lengths are greatly different from or too much of the original synthetic insulators. It can adapt to a variety of insulator models and a variety of insulation combinations. There is no need for two screw screws to be stressed at the same time. One screw is stressed, and the joint is replaced by one screw. When the screw with the joint is replaced, the other screw is stressed again. Adjust the joint with the bar until the replacement is completed, improving work efficiency.

Description

The Method of Replacing Composite Insulators at 500kV Live

technical field

The invention relates to a method for replacing composite insulators with 500kV electrification.

Background technique

Due to the limited lifting and loosening distance of the lead screw on the upper part of the insulating pull rod used to replace the 500kV composite insulator with live electricity, the operation of replacing the composite insulator with live electricity on the traditional 500kV transmission line will be different from the original composite insulator in case of different models and lengths. In most cases, a power outage is used.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for replacing composite insulators with live charging at 500kV. This method can realize the replacement of composite insulators of different models and lengths that differ greatly from the original composite insulators or have too many.

In order to solve the problems existing in the prior art, the technical solution adopted by the present invention is:

The method for replacing composite insulators at 500kV live includes the following steps:

① Install the secondary protector: The equipotential electrician enters the strong electric field along the insulating ladder, hangs the hook of the buckle-type secondary protector on the cross arm of the iron tower, and buckles the disconnector on the four-split wire;

②Install the adjustable hanging wire hook: install the tower head screw on the iron tower cross arm, after assembling the adjustable insulating pull plate and the adjustable hanging wire hook, connect the adjustable insulating pull plate to the tower head screw reliably, and then The equipotential electrician buckles the dropper on the four-split wire;

③Replace the insulator: Tighten or loosen the lead screw at the tower head to a suitable position, make the adjustable suspension hook bear the vertical downward gravity of the four-split conductor, remove the old insulator, and then tighten or loosen the lead screw to a suitable position Location.

④Install the second adjustable hanging wire hook, adjust the tower head screw to the loosest or tightest, and then adjust the length of the adjustable insulating pull plate so that the length of the second tower head screw and the second insulating pull plate The sum is the same as the length of the first adjustable insulating puller, then tighten or loosen the second lead screw, use the second suspension hook to bear the gravity of the four-split wire, and alternately use the two tower head lead screws repeatedly force until the same length as the new composite insulator, that is, the installation is complete.

Advantage and effect that the present invention has are:

The method for replacing synthetic insulators at 500kV live in the present invention is not limited by the tower type or the length of the insulators, and can realize the live replacement of synthetic insulators of different models and whose lengths are greatly different from or too much of the original synthetic insulators. It can adapt to a variety of insulator models and a variety of insulation combinations. There is no need for two screw screws to be stressed at the same time. One screw is stressed, and the joint is replaced by one screw. When the screw with the joint is replaced, the other screw is stressed again. Adjust the joint with the bar until the replacement is completed, improving work efficiency.

Description of drawings

Fig. 1 is the tool used in the method for replacing composite insulators with electricity at 500kV according to the present invention.

In the figure: buckle-type secondary protector 1; hook 11; iron tower cross arm 2; wire dropper 12; four-split wire 3; tower head screw 4; adjustable insulating pull plate 5; Wire device 61; Composite insulator 7.

Detailed ways

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

As shown in Fig. 1, the method for replacing the synthetic insulator with 500kV electrification of the present invention comprises the following steps:

① Install the secondary protector: the equipotential electrician enters the strong electric field along the insulating ladder, hangs the hook 11 of the buckle-type secondary protector 1 on the cross arm 2 of the iron tower, and buckles the disconnector 12 on the four-split wire 3;

②Install the adjustable hanging wire hook: install the tower head screw 4 on the iron tower cross arm, after assembling the adjustable insulating pull plate 5 and the adjustable hanging wire hook 6, install the adjustable insulating pull plate 5 and the tower head screw 4 Reliable connection, and then the equipotential electrician buckles the disconnector 61 on the four-split wire 3;

③Replacing the insulator: According to the length of the insulator to be replaced, tighten or loosen the lead screw of the tower head to a suitable position, so that the adjustable suspension hook bears the vertical downward gravity of the four-split conductor, remove the old insulator, and then place the wire Tighten or loosen the lever to the proper position.

④Install the second adjustable suspension hook, adjust the tower head screw 4 to the loosest or tightest, and then adjust the length of the adjustable insulating pull plate 5, so that the second tower head screw and the second insulating pull plate The sum of the lengths is the same as the length of the first adjustable insulating pull plate 5, then tighten or loosen the second lead screw, use the second hanging wire hook to bear the gravity of the four-split wire 3, and use the two towers alternately The leading screw is stressed until it has the same length as the new composite insulator 7, that is, the installation is completed.

The following is an example where the new insulator to be replaced is short:

① Install the secondary protector: The equipotential electrician enters the strong electric field along the insulating ladder, hangs the hook 11 of the buckle-type secondary protector 1 on the cross arm 2 of the iron tower, buckles the disconnector 12 on the four-split wire 3, Prevent the wire from accidentally falling off during operation.

②Install the adjustable hanging wire hook: install the tower head screw 4 on the iron tower cross arm, after assembling the adjustable insulating pull plate 5 and the adjustable hanging wire hook 6, install the adjustable insulating pull plate 5 and the tower head screw 4 Reliable connection, and then the equipotential electrician buckles the disconnector 61 on the four-split wire 3;

③Replace the insulator: tighten the tower head screw 4 to a suitable position, make the adjustable suspension hook 6 bear the vertical downward gravity of the four-split wire 3, remove the old insulator, and then screw the tower head screw 4 to the tightest .

④Install the second adjustable suspension hook, adjust the tower head screw 4 to the loosest position, and then adjust the length of the adjustable insulating pull plate 5 so that the sum of the lengths of the second tower head screw and the second insulating pull plate The same length as the first adjustable insulating puller, then tighten the second tower head lead screw, use the second hanging wire hook to bear the gravity of the four-split wire, and use the two lead screws alternately to bear the force until it is the same as The new composite insulators have the same length, ie the installation is complete.

Claims (1)

1. A method for replacing composite insulators with electricity at 500kV, characterized in that it comprises the following steps: ① Install the secondary protector: The equipotential electrician enters the strong electric field along the insulating ladder, hangs the hook of the buckle-type secondary protector on the cross arm of the iron tower, and buckles the disconnector on the four-split wire; ②Install the adjustable hanging wire hook: Install the two tower head screws on the iron tower cross arm, assemble the two adjustable insulating pull plates with the two adjustable hanging wire hooks one by one, and connect the adjustable insulating pulling plate to the tower The head screw is reliably connected, and then the equipotential electrician buckles the disconnector on the four-split wire; ③Replace the insulator: Tighten or loosen the first tower head lead screw to a suitable position, make the first adjustable suspension hook bear the vertical downward gravity of the four-split wire, remove the old insulator, and then place the first Tighten or loosen the tower head screw to a suitable position; ④Install the second adjustable suspension hook, adjust the second tower head screw to the loosest or tightest, and then adjust the length of the second adjustable insulating pull plate so that the second tower head screw is in line with the second The sum of the lengths of the first adjustable insulating pull plate is the same as the length of the first adjustable insulating pull plate, and then tighten or loosen the second tower head screw, and use the second hanging wire hook to bear the gravity of the four split wires, Repeatedly and alternately make the two tower head screws bear force until the length of the new synthetic insulator is the same, that is, the installation is completed.