CN206758395U - Vacuum fastp-acting fuse - Google Patents

Abstract

It the utility model is related to a kind of vacuum fastp-acting fuse,Including vitreosil pipe,Fuse is provided with vitreosil pipe,The length direction of fuse is parallel with the length direction of vitreosil pipe,Vitreosil pipe is provided at both ends with first,Second metallic object,First is respectively arranged with fuse,Second spring,First,One end of second spring is fixed on fuse,First,The other end of second spring is separately fixed at first,On second metallic object,Including vitreosil pipe,Fuse is provided with the vitreosil pipe,The length direction of the fuse is parallel with the length direction of vitreosil pipe,The vitreosil pipe is provided at both ends with first,Second metallic object,First is respectively arranged with the fuse,Second spring,Described first,One end of second spring is fixed on fuse,Described first,The other end of second spring is separately fixed at first,On second metallic object.

Description

Vacuum fastp-acting fuse

Technical field

It the utility model is related to electrical equipment technical field, and in particular to a kind of vacuum fastp-acting fuse.

Background technology

Often protection of the thermal cut-off as low capacity equipment is used in high voltage electric equipment.Thermal cut-off is usually to be serially connected in In circuit, when it the anomalies such as phase fault, overcurrent, overload, overvoltage or overheat occurs in circuit, it can fuse immediately And protection equipment effect is played, faulty equipment is departed from power network, can prevent that failure from further expanding, ensure that other equipment is normally transported OK, the reliable electricity consumption of power consumer is ensured.

Common fuse is commonly called as fuse or protective tube.The composition of common fuse is generally by earthenware, metal cap, fuse Formed with quartz sand.Two metal caps are enclosed on earthenware both ends, and fuse (being made using low melting point metal material) is mounted in earthenware Interior, both ends are respectively welded on the centre bore of two metal caps, and weld firm, and quartz sand is filled up in its pipe.Will be molten during use Disconnected device is fitted into Insurance Block, with circuit connected in series.When the apparatus overload in circuit or circuit or when breaking down, part heating is melted And melt, so as to cut off circuit, reach the purpose of protection circuit or equipment.

In 35 kilovolts or 10 kilovoltage transformers and transformer of transformer station (institute) operation, fuse is commonly used as guarantor Shield.Often 35 kilovolts of generation or 10 kilovoltage transformers and transformer burn phenomenon, or even occur because fuse explodes, shape Into phase fault, cause bus protection to act, whole bus or transformer is had a power failure, expand power failure range, cause equipment to stop Fortune accident.Serious analysis failure cause draws following result：Due to being full of quartz sand in pipe, when certain reason makes fuse fuse During fusing, fuse melting metallic particles, it is attached on quartz sand, forms high value conductive channel, when voltage pulsation, lead again It is logical, resonance phenomena is easily formed, until voltage transformer burns or fuse blast.

Utility model content

The purpose of this utility model is：A kind of vacuum fastp-acting fuse is provided, can fast shut-off fault current, it is ensured that electric arc Extinguish, play isolated fault power equipment.

To achieve the above object, the utility model adopts the following technical scheme that：

Vacuum fastp-acting fuse, including vitreosil pipe, fuse, the length of the fuse are provided with the vitreosil pipe Degree direction is parallel with the length direction of vitreosil pipe, and the vitreosil pipe is provided at both ends with first, second metallic object, institute To state and first, second spring is respectively arranged with fuse, one end of first, second spring is fixed on fuse, described first, The other end of second spring is separately fixed on first, second metallic object.

Following characteristics also be present in the utility model：

The both ends of the fuse are respectively arranged with annealed copper wire, and first, second spring is separately fixed on annealed copper wire.

Two fixing points are provided with the annealed copper wire, the both ends of first, second spring are separately fixed at fixing point On.

Compared with prior art, the technique effect that the utility model possesses is：The fuse of fuse is arranged on vitreosil In pipe, fuse is in the presence of fault current, fuse failure, in the presence of first, second spring force, first, second bullet Spring, which resets, makes fuse failure point, to both ends quick separating, increases the distance between fracture, and arc-extinguishing medium vacuum, can ensure that electric arc Extinguish, improve the performance of fusion tube protection equipment, reduce power failure range, ensure equipment normal operation, be Electricity customers reliable power supply.

Brief description of the drawings

Fig. 1 is the sectional structure chart of vacuum fastp-acting fuse；

Fig. 2 is the vitreosil pipe internal structure schematic diagram in vacuum fastp-acting fuse；

Fig. 3 is that the fuse of vacuum fastp-acting fuse is in the view of fusing.

Embodiment

With reference to Fig. 1 to Fig. 3, the utility model is further described：

Vacuum fastp-acting fuse, including vitreosil pipe 10, fuse 20 is provided with the vitreosil pipe 10, it is described molten The length direction of silk 20 is parallel with the length direction of vitreosil pipe 10, the vitreosil pipe 10 be provided at both ends with first, Second metallic object 30,40, is respectively arranged with first, second spring 50,60 on the fuse 20, first, second spring 50, 60 one end is fixed on fuse 20, and the other end of first, second spring 50,60 is separately fixed at first, second metal On body 30,40；

With reference to shown in Fig. 1 and Fig. 3, the fuse 20 of fuse is arranged in quartz ampoule 10, is then vacuumized, closing vacuumizes Mouthful, in the presence of fault current, fuse 20 fuses fuse 20, in the presence of first, second spring 50,60 elastic force, first, Second spring 50,60, which resets, makes the striking point of fuse 20, to both ends quick separating, increases the distance between fracture, and arc-extinguishing medium is true Sky, arc extinction is can ensure that, improve the performance of fusion tube protection equipment, reduce power failure range, ensured equipment normal operation, be electricity consumption Client's reliable power supply.

As preferred scheme of the present utility model, the both ends of the fuse 20 are respectively arranged with annealed copper wire 21, described first, Second spring 50,60 is separately fixed on annealed copper wire 21；

Above-mentioned annealed copper wire 21 realizes conducting for whole fuse, when fuse 20 fuses, first, second spring 50, 60 elastic reset power causes annealed copper wire 21 to deform, and cause above-mentioned annealed copper wire 21 close to first, second metallic object 30, 40, so as to realize the quick fuse of above-mentioned fuse.

Specifically, with reference to shown in Fig. 2, two fixing points 211, first, second bullet are provided with the annealed copper wire 21 The both ends of spring 50,60 are separately fixed on fixing point 211；

Above-mentioned fixing point 211, which is located on annealed copper wire 21, is provided with two, and one of fixing point 211 is respectively close to First, in the second metallic object 30,40, another fixing point 211 is close to fuse 20, in the case where fuse 20 fuses, first, second Under the reset force effect of spring 50,60, the quick separating of fuse 20 is realized.

It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation Involved claim.

Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art It is appreciated that other embodiment.

Claims (3)

1. vacuum fastp-acting fuse, it is characterised in that：Including vitreosil pipe (10), it is provided with the vitreosil pipe (10) Fuse (20), the length direction of the fuse (20) is parallel with the length direction of vitreosil pipe (10), the vitreosil pipe (10) be provided at both ends with first, second metallic object (30,40), be respectively arranged with first, second spring on the fuse (20) (50,60), one end of first, second spring (50,60) are fixed on fuse (20), first, second spring (50, 60) the other end is separately fixed on first, second metallic object (30,40).

2. vacuum fastp-acting fuse according to claim 1, it is characterised in that：The both ends of the fuse (20) are set respectively There is annealed copper wire (21), first, second spring (50,60) is separately fixed on annealed copper wire (21).

3. vacuum fastp-acting fuse according to claim 2, it is characterised in that：Two are provided with the annealed copper wire (21) Fixing point (211), the both ends of first, second spring (50,60) are separately fixed on fixing point (211).