CN203503397U

CN203503397U - String-disconnection prevention lead insulator chain hanging point first insulator

Info

Publication number: CN203503397U
Application number: CN201320588123.2U
Authority: CN
Inventors: 杨立春; 戴建国; 赵煜; 王丽春; 刘彦芳; 王万才
Original assignee: Datong Ehv Power Sypply Company Jibei Power Co Ltd; State Grid Corp of China SGCC
Current assignee: Datong Ehv Power Sypply Company Jibei Power Co Ltd; State Grid Corp of China SGCC
Priority date: 2013-09-24
Filing date: 2013-09-24
Publication date: 2014-03-26
Anticipated expiration: 2023-09-24

Abstract

The utility model relates to a power transmission line insulator, concretely to a string-disconnection prevention lead insulator chain hanging point first insulator and solving the problem that the bulb of a present connection fitting bulb link is fractured. The steel cap of the novel lead insulator chain hanging point first insulator is in direct connection with a hanging point U-shaped link, and the other parts have same structures with a traditional insulator structure. In use, only one step of changing the lead insulator chain hanging point first insulator is needed; compared with traditional installation programs, the program of connecting with fittings by using a bulb link is reduced while the steel cap of the insulator is directly in connection with a hanging plate so as to firm installation; the tools can work as before and perform change in charged work; the method is easy, simple and fast.

Description

Hanging point first insulator on string falling prevention wire insulation substring

Technical field

The utility model relates to the insulator of transmission line, is specially hanging point first insulator on string falling prevention wire insulation substring.

Background technology

Year December in March, 2007 to 2012,500kV " transferring electricity from the west to the east " transmission line of Datong District superhigh pressure electric company administration causes 2 wires to land fault because ball-eye ruptures, 5 double insulator suspension strings are wherein a string falls string, has a strong impact on the safe operation of transmission line.

Cause ball-eye major cause of failure to be: the residing position of line steel tower is mostly location, high mountain high hill, both sides, tower position span skewness and be positioned at the tuyere area of cross line direction, make wire have the Tension Difference along line direction, walking crosswise under wind load action, as shown in Figure 1, the frictional force of suspension string hanging point connection Yu Tacai contact position, gold utensil UB link plate side causes self can not be along line direction flexible rotating, thereby the poor part of longitudinal tension force is delivered to the root of ball-eye, this place is region of stress concentration, and act on the moment of flexure long-term existence of this position, change with the wind, the moment of flexure that this long-term existence and numerical values recited often change causes fatigue of materials damage, and then develop into bulb and rupture comprehensively, cause insulator string to fall the critical defect of string, wire even occurs to land, cause the long-time fault outage of transmission line, thereby cause the generation of the series of problems such as supply load loss.

Summary of the invention

There is the problem of fracture in the utility model, hanging point first insulator on a kind of new string falling prevention wire insulation substring is provided in order to solve current connection hardware ball-head link.

The utility model is to adopt following technical scheme to realize:

Hanging point first insulator on a kind of string falling prevention wire insulation substring, on string falling prevention wire insulation substring, hanging point first insulator is toughened glass insulator, on the steel cap of described toughened glass insulator, have hinge hole, the steel cap of described toughened glass insulator is directly connected with the U-shaped link group of upper hanging point.

The remainder of insulator string is identical with conventional insulators structure, and on wire insulation substring, hanging point first insulator has replaced the ball-eye of easy fracture, is directly connected with the U-shaped link group of upper hanging point, has improved the flexibility that insulator string rotates.During work, only hanging point first insulator on wire insulation substring need be changed, compared with conventional mounting program, reduce use ball-eye and connected gold utensil, upper hanging point connects gold utensil and is greatly improved, and the same with before of the Work tool using, live line working is changed, method safety, easy, quick.

The utility model is reasonable in design, simple in structure, the high mountain high hill, tuyere area, the large discrepancy in elevation region span that are adapted to be in high height above sea level are greater than the application of the iron tower of power transmission line wire insulation substring of 700 meters, improve power network safety operation, effectively avoided the alternation effect of dynamic wind load to gold utensil, because ball-eye fracture causes the circuit accident that goes offline, strengthened the problem of the aspects such as the flexibility ratio of wire insulation substring in fair line road and horizontal path direction, rotatory.

Accompanying drawing explanation

Fig. 1 is that UB link plate and ball-eye syndeton are at the vertical misalignment schematic diagram having under wind state.

Fig. 2 is the structural representation of toughened glass insulator.

Fig. 3 is steel cap schematic diagram.

In figure, 1-steel cap, 2-adhesive, 3-steel pin, 4-glass workpiece, 5-Buddhist nun's suede.

Embodiment

Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.

Hanging point first insulator on a kind of string falling prevention wire insulation substring, on string falling prevention wire insulation substring, hanging point first insulator is toughened glass insulator, on the steel cap of described toughened glass insulator, have hinge hole, the steel cap of described toughened glass insulator is directly connected with the U-shaped link group of upper hanging point.As shown in Figure 3, the steel cap of toughened glass insulator has the ear seat (being hinge hole) being directly connected with U-shaped link group, has weeded out the ball-eye of easy fracture.

Insulator is a kind of special insulation control, can in overhead transmission line, play an important role.Insulator should be because environment and the electric loading condition various dynamo-electric stress causing that changes lost efficacy, otherwise insulator just can not produce great effect, will damage use and the service life of whole piece circuit.As shown in Figure 2, the main material of the toughened glass insulator of electric line is that steel cap 1, toughened glass part 4 or pottery and steel pin 3 form, and sticks to one with adhesive 2, also has Buddhist nun's suede 5 between the outer of steel cap 1 and toughened glass part 4.

Claims

1. hanging point first insulator on a string falling prevention wire insulation substring, it is characterized in that: on string falling prevention wire insulation substring, hanging point first insulator is toughened glass insulator, on the steel cap of described toughened glass insulator, have hinge hole, the steel cap of described toughened glass insulator is directly connected with the U-shaped link group of upper hanging point.