CN200969333Y

CN200969333Y - High breaking high-voltage drop-off fuse

Info

Publication number: CN200969333Y
Application number: CN 200620147924
Authority: CN
Inventors: 张立平
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-10-26
Filing date: 2006-10-26
Publication date: 2007-10-31
Anticipated expiration: 2016-10-26

Abstract

The utility model relates to a high breaking high voltage drop fuse, comprising a porcelain insulator, a block arranged on the bottom of the porcelain insulator, a conductive slice on the top of the porcelain insulator and a drop insulation pipe arranged between the block and the upper conductive slice. A casing is provided within the drop insulation pipe, the alloy fuse is sealed in the casing, and the casing is filled with quartz sands. The structure avoids the accidents of explosion or short-circuit caused by the low breaking force in traditional structure, which has advantages of high electrical breaking capacity, simple structure, easy installation operation, safety and reliability etc.

Description

The high breaking high voltage drop-out type fuse cutout

Technical field

The utility model relates to the following fuse switch in the field of high-tension fuse, particularly 35KV.

Background technology

The conventional high-tension fuse switch is made of porcelain vase, drop type arc-extinguishing tube, switch block, last conducting strip, fuse etc., its structural principle is to adopt a simple combination fuse to be installed in the drop type arc-extinguishing tube, arc quenching material in the flame combustion arc-extinguishing tube when utilizing fuse failure makes its generation arc extinguishing gases and blows out electric arc.But in the distribution of larger capacity, often cause the fuse blast easily or cause bigger short circuit accident by the aforesaid way arc extinguishing.Reason is that the maximum of aforesaid way arc extinguishing is born electric breaking capacity only below 6.3KA, can not satisfy the electric disjunction requirement of big capacity short circuit current.

The utility model content

The purpose of this utility model is the weak point that overcomes above-mentioned prior art, proposes the high breaking high voltage drop-out type fuse cutout that a kind of deft design, simple, the electric interrupting performance of fitting operation improve greatly.

The purpose of this utility model is achieved by the following technical solution: the high breaking high voltage drop-out type fuse cutout, include porcelain vase, be loaded on the switch block of porcelain vase bottom, be loaded on the last conducting strip on porcelain vase top, be loaded on the drop type insulated tube between switch block and the last conducting strip, in the drop type insulated tube sleeve pipe is housed, the alloy fuse is packaged in the sleeve pipe, and is filled with quartz sand in the sleeve pipe.Further, space out rapidly after fusing for making fuse, sleeve pipe two ends and fuse lead-in wire junction are provided with the end spring.

Such design is sealed in the alloy fuse in the sleeve pipe, by the quartz sand arc extinguishing in the sleeve pipe, prevents that simultaneously the electric arc diffusion from burning out the drop type insulated tube, has tangible advantage during disjunction:

1, the structural modification of fuse is little, and only the internal diameter of need drop type insulated tube and sleeve pipe adapt and get final product, and cost is low;

2, sleeve pipe is together with the mounting or dismounting of fuse one, and fitting operation easily, conveniently;

3, electric interrupting performance improves 4-10 doubly than tradition.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of sleeve pipe and alloy fuse.

Embodiment

Referring to Fig. 1 and Fig. 2, the high voltage drop-out type fuse cutout of present embodiment includes conventional porcelain vase 1, goes up conducting strip 2, drop type insulated tube 3, switch block 5.The special improvement is to be set with in the drop type insulated tube 3 sleeve pipe 4, and sleeve pipe 4 inner stuffings are quartz sand 6, and alloy fuse 7 is packaged in the sleeve pipe 4 fully, and the two ends up and down of alloy fuse 7 are drawn by fuse lead-in wire 8.The two ends up and down of sleeve pipe 4 are equipped with end spring 9, and the tension of end spring 9 is on fuse lead-in wire 8 up and down.During the fuse disjunction, 7 fusing of alloy fuse, be filled in its quartz sand 6 on every side and play the arc extinguishing effect, the pulling force of end spring 9 quickens to draw back the fusing mouth of alloy fuse 7, simultaneously, switch block 5 clockwise directions rotate, and drop type insulated tube 3 falls downwards automatically, cut off the electricity supply, thereby guarantee the safety of equipment and circuit.The electric breaking capacity of this fuse is more than 30KA.

Certainly, only enumerated a kind of preferred implementation here, the protection category that other is equal to, structure roughly the same all should belong to this patent repeats no more here.

Claims

1, high breaking high voltage drop-out type fuse cutout, include porcelain vase, be loaded on the switch block of porcelain vase bottom, be loaded on the last conducting strip on porcelain vase top, be loaded on the drop type insulated tube between switch block and the last conducting strip, it is characterized in that: in the drop type insulated tube sleeve pipe is housed, the alloy fuse is packaged in the sleeve pipe, and is filled with quartz sand in the sleeve pipe.

2, fuse according to claim 1 is characterized in that sleeve pipe two ends and fuse lead-in wire junction is provided with the end spring.