CN201352497Y

CN201352497Y - Dry type explosion-proof type capacitor

Info

Publication number: CN201352497Y
Application number: CNU2008200502690U
Authority: CN
Inventors: 张业清; 马明军; 刘晓初
Original assignee: 骆家星
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-11-25
Anticipated expiration: 2018-07-04

Abstract

The utility model discloses a dry type explosion-proof type capacitor which comprises a wiring terminal and a main body of capacitor; the main body of capacitor comprises a closed shell and a capacitor core which is positioned in a shell cavity; and the shell cavity is also filled with special sealing materials which take asphalt as the main raw materials so as to cause the capacitor core to be completely wrapped in the sealing materials. As the embodiment of the utility model adopts a special sealing material, the contradictions of the self-healing capacitor in the aspect of dry type and safety property are well solved. The capacitor is not only completely dry type, but can also lead gas to easily overflow when being broken down; and a explosion-proof device can be led to act, thus leading the capacitor to be disconnected from a circuit. The special sealing material has excellent insulation property and fire-retardant property, and has no corrosive and swelling effects on the capacitor core.

Description

A kind of dry type explosion-proof type capacitor

Technical field

The utility model relates to electric elements, relates in particular to a kind of dry type explosion-proof type capacitor.

Background technology.

It is that the client is the most deeply concerned that self-healing AC capacitor in the market has two important characteristics:

1) dry type or oil immersed type, there is the danger of leakage of oil in the oil immersed type capacitor, and equipment and environment are had pollution, so the client wishes that capacitor is a dry type;

2) fail safe, capacitor preferably showed as open circuit when losing efficacy, and opened from circuit interruption, danger such as can not cause short circuit, explode, catch fire.The main material of self healing capacitor is a metallized film, and this material not exclusively shows as short circuit when puncturing, but is equivalent to the resistance that resistance is minimum, and the size of resistance is at random, therefore can not use fuse explosion-proof.The generation of a large amount of heats and gas owing to invariably accompany during capacitor breakdown increases casing internal pressure, and therefore the most effectively pressure type is explosion-proof at present.The potting compound of dry-type capacitor is a solid, and gas is not easy to overflow, therefore can not working pressure formula explosion-protection equipment.

Owing to above reason, present dry-type capacitor can't working pressure formula explosion-protection equipment, and fail safe is not as the oil immersed type capacitor.

Summary of the invention

For overcoming the deficiencies in the prior art, the utility model embodiment provides a kind of dry type explosion-proof type capacitor, adopt a kind of special potting compound, solved the contradiction of self healing capacitor aspect dry type and fail safe well, capacitor is complete dry type, can accomplish again under any circumstance can both in time open from circuit interruption.

The utility model embodiment provides a kind of dry type explosion-proof type capacitor, it comprises binding post and capacitor main body, described capacitor main body comprises closed shell and is arranged in the capacitor body of described housing cavity, also being filled with pitch in the described housing cavity is the potting compound of primary raw material, and described capacitor body is wrapped in the described potting compound fully.

Further, described binding post is electrically connected with described capacitor body by one explosion-proof.

Further, described potting compound is primary raw material with pitch, adds following batching: ceresine 3%～18%, polybutene 2%～8%, ten bromines 0.5%～9%, antimonous oxide 0.8%～8%, Hybrid Heating stirs and makes.

Adopt the utility model embodiment, owing to adopted a kind of special potting compound, solved the contradiction of self healing capacitor aspect dry type and fail safe well, capacitor is complete dry type, can accomplish again when capacitor breakdown gas to be overflowed easily; Make explosion-protection equipment action in time that capacitor is left from circuit interruption.

Described special potting compound insulation property are good, can the burn into swelling action do not arranged to capacitor body, and have anti-flaming function.

Description of drawings

Fig. 1 is a kind of dry type explosion-proof type capacitor side structure perspective view that the utility model embodiment provides;

Fig. 2 is a kind of dry type explosion-proof type capacitor vertical view that the utility model embodiment provides.

Embodiment

For making this purpose of this utility model, technical scheme and advantage clearer, the utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, the utility model embodiment provides a kind of dry type explosion-proof type capacitor, it comprises binding post 1 and capacitor main body, described capacitor main body comprises closed shell 2 and is arranged in the capacitor body 3 of described housing cavity, also being filled with pitch in the described housing cavity is the potting compound 4 of primary raw material, and described capacitor body is wrapped in the described potting compound fully.Described binding post 1 is electrically connected with described capacitor body 3 by one explosion-proof 5.Described capacitor body also is enclosed within the insulation protection tube 6.

Described potting compound is primary raw material with pitch, adds following batching: ceresine 3%～18%, polybutene 2%～8%, ten bromines 0.5%～9%, antimonous oxide 0.8%～8%, Hybrid Heating stirs and makes.Low cost of manufacture.

Introduce the main manufacture craft of dry type explosion-proof type capacitor down below:

Such as earlier pitch being heated to molten state, add batching in above ratio, stir until merging fully;

During Deng product embedding, again the special potting compound for preparing is heated to 85 ℃～115 ℃, make its fusing and have good flowability, special potting compound is poured in the capacitor casing, up to flooding capacitor body fully, the equitemperature cooling, described potting compound just is frozen into solid, shaped, and when capacitor breakdown, the gas of generation can overflow at an easy rate, can cooperate the action of pressure type explosion-protection equipment, capacitor is cut off from circuit.

Described capacitor is a metallic film capacitor, and described potting compound is applicable in the metallic film capacitor of any model or shape.Being not limited to the form of capacitor case such as the use of described potting compound, can be shell such as cylindrical, oval, square, also is not limited to concrete product type, and all metallic film capacitors can use.

The above is a preferred implementation of the present utility model; certainly can not limit the interest field of the utility model with this; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement and change, these improvement and change also are considered as protection range of the present utility model.

Claims

1, a kind of dry type explosion-proof type capacitor, it comprises binding post and capacitor main body, it is characterized in that, described capacitor main body comprises closed shell and is arranged in the capacitor body of described housing cavity, also being filled with pitch in the described housing cavity is the potting compound of primary raw material, and described capacitor body is wrapped in the described potting compound fully.

2, a kind of dry type explosion-proof type capacitor according to claim 1 is characterized in that, described binding post is electrically connected with described capacitor body by one explosion-proof.

3, a kind of dry type explosion-proof type capacitor according to claim 1 and 2 is characterized in that described capacitor is a metallic film capacitor.