Machine for lifting earth wire of ultrahigh-tension power transmission line

Abstract

The invention discloses a high tension transmission line ground wire raiser, including a base arranged on the cross arm head of the above of the stringing pole, an external holding frame arranged on the base and a pulley rotating freely in the vertical direction arranged in the external holding frame, wherein the pulley is a roller of the dish shape and arranged with a groove for the insulated single rope to move along the cirumferential direction, and a fastener is arranged on the base. The invention not only has simple structure and convenient installation and use, but also the stress of the cross arm is vertical to the ground in the operation process, which solves the problems of the non normal stress of the ground wire in the lifting process, reduces the overhaul cost and relieves the labor intensity of the field operation staff, meanwhile saves time, wherein the time is shortened for a half; the falling and the lifting of the ground wire in the operation are free and once for all, the lift stroke is not limited and is safe and reliable, which can effectively solves the problems of long distance and dynamic falling and lifting of the ground wire.

Description

technical field [0001] The invention relates to the technical field of overhaul and maintenance of high-voltage transmission lines, in particular to a ground wire lifter for high-voltage transmission lines. Background technique [0002] In recent years, due to the lightning damage and wind damage caused by climate change to high-voltage transmission lines, as well as the external force damage accompanying urban development and construction, the ground wire damage accidents of high-voltage transmission lines have occurred frequently. Since the overhead ground wire is located on the uppermost layer of the entire high-voltage transmission line, it is often necessary to loosen and lift the ground wire during ground wire repair and optical cable repair and maintenance; in addition, the ground wire can also be used as an air slide for other wire repairs. Therefore, the ground wire is loose and the lifting rate increases accordingly. However, in line maintenance, the method of gre...

AI Technical Summary

Problems solved by technology

However, in line maintenance, the method of greatly loosening and lifting the ground wire has always remained in the traditional process

[0003] The traditional technology mainly has the following problems: 1. In the maintenance of high-voltage transmission lines, there are many uncertain factors affecting the loosening and lifting of the ground wire. , the lifting distance of existing tools of the same type is only about 300mm, which cannot meet the requirements of line maintenance work; 2. The working environment of line maintenance is complicated, and most of the operations are complicated and require secondary operations when using existing tools with short lifting distances for lifting. Not only the maintenance cost is high, but also the labor intensity is high; 3. Because in the design of the erecting pole and tower, the cross arm of the fixed wire is subjected to vertical downward pressure and horizontal tension, and in the process of loosening and lifting the ground wire in the traditional process, a large The stress situation of some tools cannot meet the above-mentioned vertical force requirements in the design of the tower; 4. With the adoption of double-circuit and multi-circuit towers, the cross-arm will continue to lengthen, and manual lifting cannot be carried out; 5. Poor safety, Most of the existing tools of the same type are naturally suspended during the wire repairing and lifting process, so it is easy to slip out of the cross-arm head during its use, and there is no corresponding backup protection measure for sliding out of the cross-arm head, and there is no Take corresponding backup protection measures to prevent the wire from falling off; 6. Due to the lack of hesitation of the tools, the manpower increases, the cost increases and the safety cannot be guaranteed. At the same time, the controllability of the tools used in the line maintenance is not strong; 7. The operation method is not standardized, and the non-standard operation method directly affects the promotion of standardized operation

In short, the existing tool for lifting the ground wire has a short stroke, and cannot solve the problems in the long-distance and dynamic ground wire loosening and lifting

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