Synchronous lifting double insulator string

Abstract

The invention discloses a synchronous hoisting type duplex insulator string which is used for power transmission line construction. The synchronous hoisting type duplex insulator string comprises two parallel insulator string bodies with the lower ends connected together through a connecting yoke plate. Each insulator string body comprises a hoisting fitting string and an insulator set which are sequentially connected from top to bottom, and further comprises a hoisting device which is arranged between two traction plates in the hoisting fitting string, wherein the hoisting device comprises a traction groove with the U-shaped section and a cylindrical hoisting rod arranged in the traction groove to be matched with the traction groove, traction holes are correspondingly formed in the middles of a front groove plate and a rear groove plate of the traction groove, the hoisting rod penetrates through the traction plates, and the ends, located outside the traction plates, of the hoisting rod are provided with threads and fixing nuts matched with the threads. The synchronous hoisting type duplex insulator string has the advantages of being novel in design and simple in structure; the two insulator string bodies and the hoisting fitting string of the duplex insulator string can be simultaneously hoisted to preset installation positions, and the two insulator string bodies can be prevented from colliding with each other or being twisted together in the hoisting process.

Description

technical field [0001] The invention relates to the field of electric power transmission line construction, in particular to a double insulator string capable of synchronous lifting. Background technique [0002] Insulator strings are the most common products for transmission line wiring today. The insulator strings that bear the tension or gravity of one wire or split wires are used together with supporting power fittings. According to construction needs, several products are connected in parallel to meet the tension requirements. Take the 400kN rod-type insulator double-connected strain string applicable to 500kV line engineering as an example. The strain string is a four-split straight jump, and the lower ends of the two strain insulator strings are connected through a connecting plate, which is a whole. It cannot be disassembled and hoisted during the installation process, and the total weight of the double tension insulator string is 1000kg, which brings certain difficu...

AI Technical Summary

Problems solved by technology

Take the 400kN rod-type insulator double-connected strain string applicable to 500kV line engineering as an example. The strain string is a four-split straight jump, and the lower ends of the two strain insulator strings are connected through a connecting plate, which is a whole. It cannot be disassembled and hoisted during the installation process, and the total weight of the double tension insulator string is 1000kg, which brings certain difficulties to the installation of the double tension insulator string. The two strings of insulators are hoisted to the installation position at the same time, and measures must be taken to prevent the two strings of insulators from colliding with each other, because once the two strings of insulators collide with each other during the lifting process, the surface of the insulator porcelain body will be damaged and peeled off or cracks will occur inside. The tensile strength and insulation performance of damaged insulators will be seriously affected. If necessary, the insulator strings will need to be replaced again, which will affect the normal progress of construction operations and cause large economic losses.

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