A retractable limit damper for power transmission lines

Abstract

The invention discloses a telescopic limiting damper for a power transmission line. The telescopic limiting damper for the power transmission line comprises a protection housing, a pull rod and a springback spring. The springback spring sleeves the internal of the protective housing; the lower end of the protective housing has a guiding clamping groove which is matched with an outer diameter of the pull rod in size; a limiting device A is arranged on the lower end of the protective housing and is positioned above the guiding clamping groove; the pull rod is connected to the protection housing through the guiding clamping groove in a sliding manner; a limiting device B is fixed on the top of the pull rod; the springback spring sleeves the periphery of the pull rod; the top of the springback spring is connected to the lower surface of the limiting device B; the bottom of the springback spring is connected to the upper surface of the limiting device A; and the outer side of the limiting device is matched with the inner side of the limiting device A in a nesting manner. The telescopic limiting damper for the power transmission line solves technical problems that a constraint device cannot be freely telescopic along with a pulling force.

Description

technical field [0001] The invention relates to a retractable position-limiting damper for power transmission lines, which belongs to the technical field of power line maintenance. Background technique [0002] Trip accident is one of the main problems that endanger the safe operation of the line. According to the statistics of the State Grid Corporation of China in 2015, the main causes of line tripping are: lightning strikes (617 times, accounting for 40.6%), external damage (330 times, accounting for 21.7%), ice damage (201 times, accounting for 13.2%), Bird damage (170 times, accounting for 11.2%) and wind damage (152 times, accounting for 10%). The main causes of outages are: external damage (174, accounting for 31.6%), ice damage (156, accounting for 28.4%), wind damage (104, accounting for 18.9%) and lightning strikes (69, accounting for 12.5%) , and bird damage (19, accounting for 3.5%). [0003] It can be seen from the above statistical results that the wind defl...

AI Technical Summary

Problems solved by technology

For lines that are already in operation, a weighted hammer and a double-string "character-eight" arrangement are generally used, but in this way the insulator strings will still swing towards the tower under the action of strong winds.

Images