Preparation method of arc extinction material for high voltage fuse

Abstract

The invention discloses a preparation method of an arc extinction material for a high voltage fuse, and belongs to the technical field of preparation of arc extinction materials. Prepared quartz sandis amorphous silica prepared from diatomite through infiltration of phosphoric acid and urea and chemical purification, the synthesized arc extinction material has low impurity content and pure composition, microcrystalline cellulose is produced in the quartz sand under the action of infiltration and can integrate functions of filling, thickening and emulsifying, nylon can produce flame-retardantgas polyamide in high-voltage arc, through composition of the components in specific quantities, the components can affect mutually, act jointly and produce a synergistic effect, so that the arc extinction material based on the flame-retardant gas polyamide produces obviously increased gas after being subjected to arc, gas pressure is increased obviously, and the material is decomposed more easilyin presence of high-temperature arc to produce gas and further has high flame retardance and broad application prospect.

Description

technical field [0001] The invention discloses a method for preparing an arc-extinguishing material for a high-voltage fuse, and belongs to the technical field of arc-extinguishing material preparation. Background technique [0002] Arc extinguishing is also called arc extinguishing, which is a technical term for electric power, which is to extinguish the arc. The root cause of the arc is that the contacts of the switching device itself and the medium around the contacts contain a large number of electrons that can be dissociated. When there is a large enough external voltage between the broken contacts and the circuit current reaches the minimum arc current , it will be strongly dissociated and form an arc. It is very dangerous to keep the circuit running. So turn off the arc. (Arc may occur above 750V) [0003] A fuse is an electrical appliance that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value...

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that the resin binder in current arc-extinguishing materials is flammable in high-voltage arc, and the existing low-voltage fuses usually use high-purity quartz sand as the arc-extinguishing material under high voltage and high breaking capacity. However, quartz sand has high thermal conductivity, fast heat dissipation, and is difficult to fuse. In addition, the surface of quartz sand is rough, the density is uneven when filled, and it contains impurities, which in turn affects the breaking effect. A preparation method for arc-extinguishing materials for high-voltage fuses is provided.