Method for replacing first insulator of 500kV suspension string, and general connecting device for closed clamp
A technology for connection devices and insulators, which is applied in the direction of overhead lines/cable equipment, etc., can solve the problems of high distribution voltage of insulators, easy damage to good insulators, and failure to use normally, etc., to achieve simple operation process, light and convenient installation, and quick and convenient replacement Effect
Pending Publication Date: 2021-01-15
国网江西省电力有限公司超高压分公司 +1
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Problems solved by technology
[0002] During the operation of the suspension string of 500kV transmission line, the distribution voltage of the first piece of insulator is high, so the self-explosion rate is relatively high
At present, special tools such as "closed card" cannot be used normally in the process of replacing the first insulator, and the existing operation method is not only labor-intensive, but also easily damages other good insulators during the replacement process
Method used
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[0029] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings.
[0030] A method for replacing the first insulator of a 500kV suspension string, the specific steps are as follows:
[0031] A. Climbing the tower: Before climbing the tower, the high-altitude workers should first check the personal protective equipment, and then carry the transfer rope and pulley to the working position, and take personal safety protection measures. The wires are respectively installed at the wire end and the iron tower end according to the operation requirements, and then the replacement tools are hoisted to the operation point through the transfer rope in turn;
[0032] B. Install the upper left connection device 1 and the upper right connection device 3: put the vertical rod 24 of the upper left connection device 1 with the lower round hole 18 downwards into the gap between the main materials 2 of the ...
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The invention discloses a method for replacing a first insulator of a 500kV suspension string, and a general connecting device for closed clamp. A left upper connecting device, a right upper connecting device, a closed clamp left upper connecting rod, a right upper connecting rod, a left lead screw, a right lead screw, a left lead screw crank, a right lead screw crank, a left lower connecting rod,a right lower connecting rod, a sub closed clamp lower clamp and an iron tower main material form a closed whole, and the damaged first insulator is located between the iron tower main material and the closed clamp lower clamp. The damaged first insulator does not need to hang a conventional insulator below and is not stressed any more, so that the damaged first insulator can be replaced. The method has the advantages that the damaged first insulator, a damaged second insulator and a damaged third insulator can be safely and reliably replaced, the replacement work of the first insulator can be completed through an existing conventional insulator replacement closed type clamping tool, and the tool saves expenditure, and is reliable in connection, simple in work process and the like.
Description
technical field [0001] The invention relates to an operation method for power failure maintenance of a 500kV power grid, in particular to a method for replacing the first insulator of a 500kV suspension string and a closed card universal connection device. Background technique [0002] During the operation of the suspension string of 500kV transmission line, the distribution voltage of the first piece of insulator is high, so the self-explosion rate is relatively high. At present, the 500kV transmission lines in Jiangxi Province have reached more than 4,000 kilometers. Among the insulators of these transmission lines, there is a large number of operations to replace the first insulator every year. At present, special tools such as "closed card" cannot be used normally in the process of replacing the first insulator, and the existing operation method is not only labor-intensive, but also easily damages other good insulators during the replacement process. Contents of the in...
Claims
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IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 石荣辉彭朝晖盛敏李洪胜熊华维彭福先郑和东李鹏程贺振雄唐坚徐振宇
Owner 国网江西省电力有限公司超高压分公司