Two-segment type insulation porcelain injection fuse of fuse tube peripheral equipment insulating layer

Abstract

The invention discloses a two-segment type insulation porcelain injection fuse of a fuse tube peripheral equipment insulating layer. The top of an insulation porcelain is provided with a locking device. A fuse is fixed to the wiring column of a lower part fuse tube and goes through an upper fuse tube and then is fixed at the upper end of the insulation porcelain by a locking device. A part of the fuse at a middle fuse tube has a fuse part with a small diameter. Two ends of the fuse part are provided with fireproof caps. The fuse between the fireproof caps and the upper fuse tube and the lower fuse tube is sleeved by a heat shrinkable insulation layer. The axial cavity between the upper fuse tube and the lower fuse tube is provided with a spring. A pounding head is fixed at the bottom of the lower fuse tube. The bottom of the axial cavity of the insulation porcelain is provided with a plug. According to the invention, the insulation state of the fused fuse can be ensured, and the discharge phenomenon caused by a bad fusing position is avoided. In addition, the fuse tubes are used to directly press the spring, the pounding head is used to destroy the bottom plug of the insulation porcelain, and thus the reliable ejection of the lower fuse tube can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to a fuse. Background technique [0002] Spray type fuse is to install the melt in the insulating tube made of solid gas-generating material. Solid gas-generating materials can be made of electrical anti-white cardboard or plexiglass materials. When the short-circuit current passes through the melt, the melt will be fused immediately to generate an arc, and the high-temperature arc will quickly decompose the solid gas-producing material to generate a large amount of high-pressure gas, so that the ionized gas will be ejected at both ends of the tube with an arc, and a great sound and light will be emitted. And when the AC current crosses zero, the arc is extinguished and the current is broken. Chinese patent application number 201310538197.X discloses a fuse, the fuse tube is arranged inside the insulating ceramic body, and the upper contact electrode and the lower contact ...

AI Technical Summary

Problems solved by technology

This patent has the following defects: 1. It is impossible to determine where the fuse first fuses. If the fuse occurs at the bottom end, the residual fuse on the upper part and the lead-out wire in the lower outlet are relatively close to each other, which is easy to generate arcs, resulting in Line failure; 2. The pop-up structure of this patent is unreasonable. Once the lower fuse tube is not completely popped out, the springs left in the insulating ceramic body will be used as conductors, which will easily cause incomplete breaking and cause losses.

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