A combined insulated wiring pile head for distribution transformer low-voltage protection switch box

Abstract

The invention discloses a combined type insulation wiring pile head used for a distribution transformer low voltage protection switch and belongs to the field of power supply. A split-type porcelain insulator of the pile head is composed of an upper porcelain insulator body and a lower porcelain insulator body, and the upper porcelain insulator body and the lower porcelain insulator body are buckled together; the upper porcelain insulator body passes through a wire-out opening from the exterior of a cabinet body and is connected in an inserted mode and buckled with the lower porcelain insulator body which is located inside the cabinet body. The upper porcelain insulator body and the lower porcelain insulator body are each provided with a central through hole, an integral conductive copper bar is arranged in the central through holes, after penetrating through a rain cap, the conductive copper bar passes through the central through hole of the upper porcelain insulator body and the central through hole of the lower porcelain insulator body in sequence, then the conductive copper bar penetrates out of the central through hole of the lower porcelain insulator body, the part, forming an external terminal block, of conductive copper bar is fixedly connected with the rain cap into a whole in a welded mode, a thread structure is arranged on the part, forming an internal terminal block, of conductive copper bar, and a lock nut is arranged between the part, forming the internal terminal block, of the conductive copper bar and the lower porcelain insulator body; by screwing the lock nut tightly, the conductive copper bar can drive the rain cap to fix the upper porcelain insulator body and the lower porcelain insulator body inside the wire-out opening.

Description

technical field [0001] The invention belongs to the field of power supply and distribution, in particular to an insulated wiring pile head used for a switch box. Background technique [0002] The outdoor low-voltage protection switch box is one of the important equipment in the outdoor pole transformer device of the low-voltage power distribution network. It is installed between the low-voltage end of the transformer and the low-voltage power grid. "Split" and "Close" to realize the input and cut-off operation of the low-voltage power grid. [0003] In the widely used outdoor low-voltage protection switch box at present, the outlet terminal is connected with the screw rod by the terminal pile head, and is insulated from the low-voltage protection switch box body through an insulator. The hoop-type connecting plate is converted and transitioned, and the hoop-type connecting plate is used as an intermediate connecting part to increase the resistance value of the entire connec...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a combined insulated wiring pile head for the low-voltage protection switch box of the distribution transformer. slow, the production cycle of a single product is long, the product has poor aging resistance, and the actual effective service life is relatively short. High density, aging resistance and other properties, improve the reliability of power supply, and facilitate mass production

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