CN105162028A - Method for replacing linear insulator of 220kV steel pipe tower in live working state - Google Patents

Abstract

The invention relates to a method for replacing a linear insulator of a 220kV steel pipe tower in a live working state. The method comprises that an electrician climbs the tower with an insulated rope, transfers a steel pipe tower handing point clamp and two pulley groups to the tower by using the insulated rope, and hangs the two pulley groups on the both sides of the handing point clamp; the electrician tensions the tail ropes of the pulley groups and ties the pulley groups to a tower firm member, hooks a dual-hanging wire hook on the pulley groups and a linear insulated protective rope to a wire before the wire is separated from an insulator string; the electrician picks off a hanging point at an insulator string cross arm head; the electrician hooks the wire by using the pulley groups and the dual-hanging wire hook and a ground electrician tensions the tail ropes of the pulley groups in order to lift the wire such that a bowl head on the wire is close to a new insulator string, and the electrician restores the connection of the insulator string and the bowl head by using a centralizer on an insulated operating lever and repositions a spring pin. The method may complete the work, which is required to be completed when power outage happens, when a line is not powered down so as to increase a work complete rate, increases live working items, and improves security.

Description

A method for live replacement of linear insulators for 220 kV steel pipe towers

technical field

The technical field of transmission line maintenance of the present invention is specifically a method for replacing linear insulators with electricity on a 20 kV steel pipe-type pole tower.

Background technique

The replacement of linear insulators on traditional 220 kV transmission lines is performed on ordinary iron towers. Since steel pipe towers have no working positions required for personnel and no hanging positions for traditional lifting tools, there is no suitable way to carry out such work. Others The electrified operation method can't reach the desired effect again. The 220 kV transmission line needs to vigorously carry out the live work operation project, in order to achieve the purpose of replacing the straight insulator of the steel pipe pole tower without power failure, so it is necessary to solve the practical problems of long-term stable operation of ultra-high voltage lines and the safety of personnel operations question.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for live replacement of linear insulators on 220 kV steel pipe towers, which can be carried out vigorously on the 220 kV transmission line, so as to achieve steel pipe shape without power failure. The purpose of replacing linear insulators on poles and towers is to solve the practical problem of long-term stable operation of ultra-high voltage lines.

The present invention is achieved in this way, a method for live replacement of linear insulators on a 220 kV steel pipe type pole tower, comprising the following steps:

(1) The electrician on the tower carries the insulating rope to the pole, hangs the insulating rope on the tower, and the electrician on the ground uses the insulating rope to transfer the steel pipe type pole tower hanging point fixture to the electrician on the tower;

(2) The electrician on the pole tower installs the hanging point fixture on the head of the steel pipe type pole tower cross arm;

(3) Use the insulating rope to transfer the two sets of blocks to the tower, and hang the two sets of blocks on both sides of the hanging point fixture;

(4) Use the insulating rope to transfer the insulating operation platform to the pole tower, and install the insulating operation platform on the root of the cross arm of the steel pipe type pole tower;

(5) Operate on the insulating operating platform, fix the pin remover and centralizer on both ends of an insulating operating rod, and then use the insulating rope to transfer the insulating operating rod to the tower;

(6) Hang the linear insulating protection rope on the outside of the pulley block;

(7) The electrician on the ground tightens the tail rope of the pulley block and tie it to the firm member of the tower. Before the wire is separated from the insulator string, the electrician on the tower hooks the wire with the double suspension hook on the block block;

(8) After taking out the spring pin at the bowl head of the wire with a pin remover, the ground electrician lifts the wire with an insulated tackle set to cooperate with the connection between the insulator string and the bowl head; constant;

(9) Bind the insulator strings with insulating ropes, and the electrician on the ground cooperates to pull the insulating looping ropes forcefully, and the No. 1 electrician on the pole tower removes the hanging point at the head of the insulator string;

(10) Install insulators: The electrician on the ground uses an insulating rope to transfer the new insulators that have been tested to the pole tower. The electrician on the pole tower installs a new insulator string at the hanging point of the cross-arm, installs the spring pin, and unties the insulator string. Insulation rope, the electrician on the pole tower uses the block block and the double suspension hook to hook the wire, and the ground electrician tightens the tail rope on the block block to lift the wire, so that the bowl head on the wire is close to the insulator string, and restores the insulator with the centralizer on the insulation operating rod The string connects to the bowl head and resets the spring pin.

Compared with the prior art, the present invention has the beneficial effect that: the operating method of the present invention uses an insulating operation platform, which is used to make the operator and the live wire be on a horizontal plane, which is beneficial for the operator to use the insulating rod to install and disassemble the lower part of the insulator ;Using the hanging point fixture, the installation and lifting force of the lifting tool can be effectively supported. The work that can only be completed by power failure can be completed without power failure of the line, which improves the completion rate of the work, increases the operation items of live work, and improves the safety.

Description of drawings

Fig. 1 is the structural representation of block block and hanging point fixture installation of the present invention;

Fig. 2 is a schematic diagram of the installation structure of the insulating operation platform of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example

A method for live replacement of linear insulators on a 220 kV steel pipe tower,

See Figure 1 in conjunction with Figure 2,

1) No. 1 electrician on the pole tower carries the insulating transfer rope to the pole. After hanging the insulating rope, the ground electrician uses the insulating rope to first pass the steel pipe type pole tower hanging point fixture 3 to the No. 1 electrician;

2) No. 1 electrician installs the hanging point fixture 3 on the head 4 of the steel pipe type pole tower cross arm, and installs it firmly and reliably

3) After the hanging point fixture 3 is installed, the ground electrician uses the insulating rope to pass the two sets of lifting tools 5, 5-5 tackle groups to the hands of the No. 1 electrician;

4) No. 1 electrician connects the lifting tool 5 with the installed hanging point fixture;

5) The ground electrician uses the insulating rope to hand over the insulating operation platform 6 to the No. 2 electrician on the tower;

6) Install the insulating operation platform on the root of the cross arm of the steel pipe type pole tower, and install the insulating operating platform 6 and the hanging point fixture on the same cross arm, and the installation is fastened and reliable;

7) After the ground electrician fixes the pin remover and centralizer at both ends of the insulating operating rod, use the insulating rope to transfer the assembled insulating operating rod to the tower;

8) The 5-5 blocks on both sides of the hanging point fixture and the double suspension hooks on the 5-5 blocks are installed to ensure uniform force. Hang the linear insulation protection rope on the outside of the pulley block, hang the linear insulation protection rope between the cross arm and the wire, and tighten it properly to prevent failure of each stress point.

9) The electrician on the ground tightens the tail rope 1 of the block block and tie it to the firm member of the tower. Before the wire is separated from the insulator string, the No. 1 electrician on the tower checks and confirms that the double wire hook 2 and the straight line insulation protection rope are hooked to the wire.

10) After the No. 2 electrician on the tower uses a pin remover to take out the spring pin at the bowl head of the wire, the ground electrician slowly lifts the wire with an insulating pulley block, and cooperates with the No. 2 electrician on the tower to separate the connection between the insulator string and the bowl head. After the insulator string is separated from the bowl head, the ground electrician needs to pay attention to maintaining the air gap distance between the wire and the cross arm and the cross-over distance below, and fix the 5-5 pulley block, and the position of the wire remains unchanged.

11) No. 1 electrician on the pole tower shall ensure that the effective length of the insulating rope is not less than 1.8m at 220kV. Under the premise of ensuring safety, the No. 1 electrician on the tower uses insulating rope to bind the insulator strings firmly, and the ground electrician cooperates with forcefully pulling the insulating loop rope, and the No. 1 electrician on the tower takes advantage of the opportunity to remove the hanging point at the head of the insulator string.

12) Install insulators: Ground electricians use insulating ropes to pass new insulators that have been tested to the tower. The No. 1 electrician on the tower installs a new insulator string at the hanging point of the cross arm, installs the spring pin, and turns the direction of the insulator's mouth to the same direction. Untie the insulating cord tied to the string of insulators. The No. 1 electrician on the pole and tower hooked the 5-5 block block and the double suspension hook to the wire. The ground electrician tightens the 5-5 pulley block and slowly lifts the wire so that the bowl head on the wire is close to the insulator string. Return the spring pins. After the insulator string is restored, it should be ensured that the pins are intact and the direction of the bottle mouth is consistent.

13) Removal tools: The electrician on the tower checks the connection points between the insulators, the wires and the crossarm, and checks whether the spring pins are reset. After there is no problem, dismantle the working tools (including hanging point clamps, lifting tools and insulating operation platform) on the tower and fasten them firmly with insulating ropes.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (1)

1. A method for live replacement of linear insulators in a 220 kilovolt steel pipe type pole tower, characterized in that it comprises the steps of: (1) The electrician on the tower carries the insulating rope to the pole, hangs the insulating rope on the tower, and the electrician on the ground uses the insulating rope to transfer the steel pipe type pole tower hanging point fixture to the electrician on the tower; (2) The electrician on the pole tower installs the hanging point fixture on the head of the steel pipe type pole tower cross arm; (3) Use the insulating rope to transfer the two sets of blocks to the tower, and hang the two sets of blocks on both sides of the hanging point fixture; (4) Use the insulating rope to transfer the insulating operation platform to the pole tower, and install the insulating operation platform on the root of the cross arm of the steel pipe type pole tower; (5) Operate on the insulating operating platform, fix the pin remover and centralizer on both ends of an insulating operating rod, and then use the insulating rope to transfer the insulating operating rod to the tower; (6) Hang the linear insulating protection rope on the outside of the pulley block; (7) The electrician on the ground tightens the tail rope of the pulley block and tie it to the firm member of the tower. Before the wire is separated from the insulator string, the electrician on the tower hooks the double wire hook on the block block and the linear insulation protection rope to hook the wire; (8) After taking out the spring pin at the bowl head of the wire with a pin remover, the ground electrician lifts the wire with an insulated tackle set to cooperate with the connection between the insulator string and the bowl head; constant; (9) Bind the insulator strings with insulating ropes, and the electrician on the ground cooperates to pull the insulating looping ropes forcefully, and the No. 1 electrician on the pole tower removes the hanging point at the head of the insulator string; (10) Install insulators: The electrician on the ground uses an insulating rope to transfer the new insulators that have been tested to the pole tower. The electrician on the pole tower installs a new insulator string at the hanging point of the cross-arm, installs the spring pin, and unties the insulator string. Insulation rope, the electrician on the pole tower uses the block block and the double suspension hook to hook the wire, and the ground electrician tightens the tail rope on the block block to lift the wire, so that the bowl head on the wire is close to the insulator string, and restores the insulator with the centralizer on the insulation operating rod The string connects to the bowl head and resets the spring pin.