CN203774235U - Fuse - Google Patents

Abstract

The utility model disclose a fuse and aims at providing a circuit facility with high security and stability. According to key points of the technical scheme, a variable cross section fusing body made of a pure metal housing is packaged into a fusing tube made of high-strength porcelain; the space in the fusing tube is filled with high-purity quartz sands that have been treated by chemical processing, wherein the high-purity quartz sands are used as the arc-extinguishing medium; and the two ends of the fusing body are firmly and electrically connected with contacts by spot welding. The fusing body can be provided with an indicator or an impactor. When the fusing body is fused, fusing can be displayed or various signals conversion and automatic circuit switching can be realized. The provided fuse is suitable for the circuit with heavy current.

Description

A kind of fuse

Technical field

The utility model relates to a kind of fuse.

Background technology

Fuse is mounted in the circuit facility of a safety and stability in circuit, comprises fusion tube, end cap, the contact of melt, installation melt.The quartz sand being full of in fusion tube is as arc-extinguishing medium, melt two ends adopt spot welding to be electrically connected to contact, although fusion tube is air-tight state, quartz sand has higher thermal conductivity and insulating properties, there is good arc-suppression function, but have gap between quartz sand particle and quartz sand particle, cause like this quartz sand in fusion tube cannot give full play to its arc extinction performance, the arc extinction performance variation that causes whole fuse, causes the security performance of circuit to reduce.

Utility model content

The deficiency existing for prior art, the purpose of this utility model is to provide a kind of fuse, and it has better arc extinction performance, has improved the security performance of circuit.

For achieving the above object, the utility model provides following technical scheme: fuse, the melt, end cap, the contact that comprise fusion tube, installation fusion tube, the quartz sand being full of in fusion tube is as arc-extinguishing medium, melt two ends are all electrically connected with contact corresponding to it, are filled with the quartz sand of being dried by sodium metasilicate in fusion tube.

By adopting technique scheme, quartz sand adds curing agent to be dried, and has guaranteed the compactness of quartz sand, has avoided quartz sand arc extinction performance to be difficult to give full play to, and has strengthened degree of stability and the arc extinction performance of quartz sand, has improved the security performance of circuit.

The utility model is further set to: fusion tube shell is cube structure, and its seamed edge is with rounding structure.

By adopting technique scheme, the seamed edge of cubical fusion tube is circular shape, makes user when fuse is installed, be not easy scratch.

Utility model provides following technical scheme: described quartz sand is glass sand.

By adopting technique scheme, the requirement of glass sand is SiO2 >=99.5-99.9% Fe2O3≤0.001%, adopts high-quality natural stone diamond stone, and through meticulously selecting, retrofit forms.Particle size range 1-0.5mm, 0.5-0.1mm, 0.1-0.01mm, 0.01-0.005mm.Glass sand has guaranteed thermal conductivity, the insulating properties arc quenching effect in rainy season that its medium is higher.

Accompanying drawing explanation

Fig. 1 is the stereogram of the utility model fuse embodiment;

Fig. 2 is the profile of the utility model fuse embodiment.

Embodiment

Referring to figs. 1 through Fig. 2, the utility model fuse embodiment is described further.

A kind of fuse, comprise melt (5), the fusion tube (1) of melt is installed, end cap (2), contact (3) (4), fuse is mounted in the circuit facility of a safety and stability in circuit, the quartz sand being full of in fusion tube (6) is as arc-extinguishing medium, the quartz sand being full of in fusion tube (6) is as arc-extinguishing medium, melt (5) two ends adopt and are electrically connected to contact corresponding to it (3) (4), in fusion tube, be to put into the quartz sand (6) that curing agent is dried, guaranteed the compactness of quartz sand (6), avoided quartz sand (6) performance depreciation, strengthened the degree of stability of quartz sand (6), fusion tube (1) shell is that cube forms, its seamed edge is that circular shape makes user be not easy when mounted scratch, described quartz sand (6) is glass sand, guaranteed the higher thermal conductivity of its medium, insulating properties and arc quenching effect, described curing agent has higher cohesive force, intensity, acid resistance, thermal endurance, improved the security performance of circuit, improved arc quenching effect.

Claims (3)

1. a fuse, comprise fusion tube, be installed on melt, end cap, contact in fusion tube, the quartz sand being full of in fusion tube is as arc-extinguishing medium, and melt two ends are all electrically connected with contact corresponding to it, it is characterized in that: in fusion tube, be filled with the quartz sand of being dried by sodium metasilicate.

2. fuse according to claim 1, is characterized in that: fusion tube shell is cube structure, and its seamed edge is with rounding structure.

3. fuse according to claim 1 and 2, is characterized in that: described quartz sand is glass sand.