CN102280825A

CN102280825A - Transformer cabinet with ventilation and explosion prevention functions

Info

Publication number: CN102280825A
Application number: CN2011102031157A
Authority: CN
Inventors: 曹永进; 李武兴; 李锦�; 吴东; 李光鹏; 赵大兴; 王永强; 李卫军
Original assignee: Tianjin Electric Power Corp
Current assignee: State Grid Corp of China SGCC; Tianjin Electric Power Corp
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2011-12-14
Anticipated expiration: 2031-07-20
Also published as: CN102280825B

Abstract

The invention relates to a transformer cabinet with ventilation and explosion prevention functions, wherein a heat dissipation array hole is directly punched at the back part of the transformer cabinet, an explosion prevention baffle plate is hinged on the heat dissipation array hole on the inner side of the transformer cabinet, the explosion prevention baffle plate can completely cover the heat dissipation array hole, a gap which is communicated with the heat dissipation array hole is retained between the lower end of the explosion prevention baffle plate and the transformer cabinet and an air outlet hole is arranged at the top of a transformer. The transformer cabinet can enable a system to achieve the ventilation and explosion prevention functions through natural circulation of air and evacuate heat to the outside of the transformer cabinet through circulation of the system, thereby improving an operation environment of the transformer for a station. In addition, the transformer cabinet can timely close the heat dissipation array hole at the back part of the transformer cabinet when a failure occurs so as to prevent the occurrence of casualty accidents of staff, thereby solving the contradiction that the transformer cabinet requires good sealing property and the transformer for the station requires the ventilation and heat dissipation.

Description

A kind of transformer case with ventilation explosion prevention function

Technical field

The invention belongs to power domain, relate to transformer, especially a kind of transformer case with ventilation explosion prevention function.

Background technology

Station in the transformer station a lot all is mounted in the metal armouring transformer case of sealing with transformer, its reason is that transformer case itself needs very high requirement of shelter, when being short-circuited fault, transformer case inside can in transformer case, produce a large amount of electric arc, gas, when in transformer case, breaking down the staff outside the transformer case is damaged, electric arc, the gas that fault produced can be guided to the generation that human casualty accident is avoided in zone that the staff can not pass through thereby must satisfy in the moment that fault takes place.Usually be placed in the metal armouring transformer case of sealing with transformer but stand, being in operation needs to produce a large amount of heats, because heat can not effectively be dispersed into transformer case accumulation and gradually outward, cause the interior subenvironment of metal armouring cabinet of sealing to change, the change of this subenvironment greatly influences stands in the transformer case with the normal operation of transformer.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, provide good ventilation and heat function is arranged under a kind of normal operating condition, transformer case that the malfunction seal performance is good with ventilation explosion prevention function.

The present invention solves its technical problem and is achieved through the following technical solutions:

A kind of transformer case with ventilation explosion prevention function, directly go out a heat radiation array hole at the rear portion of transformer case, hinge is adorned a burst panel on the heat radiation array hole of transformer case inboard, this burst panel covers the heat radiation array hole fully, leave the gap that is communicated with the array hole that dispels the heat between the lower end of this burst panel and the transformer case, be shaped on exhaust vent at the top of transformer.

And, the burst panel lower end by and transformer case between be supported with one row guide rod, on each guide rod, be set with a spring.

And, the low speed blower fan is installed to substitute exhaust vent at the top of transformer case.

Advantage of the present invention and beneficial effect are:

1, this transformer case leads to the system of ventilation and heat function by the air spontaneous current, and the circulation of the heat that produces with transformer of standing by system self is dispersed into heat outside the transformer case, having improved the running environment of station with transformer thus.

2, this transformer case can in time be closed the heat radiation array hole of transformer case back when fault takes place, and the accident that prevents to cause casualties takes place, thereby has solved the contradiction of sealing and ventilation and heat.

3, this transformer case solves the closing problem of heat radiation array hole by the scheme that increases burst panel, when being short-circuited fault, inside produces a large amount of gas, electric arc, the transformer case internal pressure is suddenly increased, by the heat radiation array hole that increased pressure large impact power is closed the transformer case back, booting failure gas is derived transformer case by the exhaust vent at transformer case top.

Description of drawings

Fig. 1 is a perspective view of the present invention;

Fig. 2 is the perspective view of another angle of Fig. 1;

Fig. 3 is the external structure enlarged diagram of transformer case of the present invention;

Fig. 4 is that the A-A of Fig. 3 is to cross-sectional view;

Fig. 5 is the B portion enlarged diagram of Fig. 3;

Fig. 6 directly makes the vertical view of exhaust vent at transformer case for the present invention;

Fig. 7 is that the present invention is at the attached vertical view that the high-quality blower fan cashier's office in a shop is installed of transformer.

Embodiment

The invention will be further described below in conjunction with accompanying drawing, by specific embodiment, and following examples are descriptive, are not determinate, can not limit protection scope of the present invention with this.

A kind of transformer case with ventilation explosion prevention function is directly gone out a heat radiation array hole 6 at the rear portion of the transformer case 1 that seals, the size of heat radiation array hole, shape can design according to the load loss of station with transformer; Adorn a burst panel 5 by hinge 4 hinges on the heat radiation array hole of transformer case inboard, this burst panel covers the heat radiation array hole fully; The burst panel lower end by and transformer case between be supported with one row guide rod 8, on each guide rod, be set with a spring 7.Under normal operation, heat radiation array hole and the exhaust vent at the top circulatory system that form of the heat of transformer case inside by the rear portion got rid of outside the cabinet; When being short-circuited fault, inside produces a large amount of gas, electric arc, the transformer case internal pressure is suddenly increased, and by increased pressure large impact force compresses spring, burst panel is closed the heat radiation array hole thus, even there is a small amount of gas to go out the heat radiation array hole, also can be with gas channeling ground.

For compulsory circulation at the inner formation of transformer case air, the low speed blower fan 2 of high-quality is installed at the top of transformer case, as Fig. 1,2 and 7, in the present embodiment accompanying drawing, be three high-quality low speed blower fans to be installed at the top of the attached cabinet 3 of transformer case, adopt the high-quality fan of the slow-speed of revolution to force the design of air draft to increase air-out effect, secondary cabinet as required heat dissipation capacity require design size.

In addition, also can adopt the mode of natural draft, promptly directly make exhaust vent 9 at the top of transformer, its action principle is identical, as shown in Figure 6.

Operation principle of the present invention is:

Distribute heat when the station is moved with change is normal, air themperature is raise, air expansion, density diminishes, hot gas flows out via transformer case top exhaust vent, and pressure diminishes in the transformer case, and the outer pressure of transformer case is bigger, the heat radiation array hole of the outer cold air of cabinet after by cabinet compressed into transformer case, heat is taken away thereby form a circulation.If the cabinet top does not have pressure release passage can consider to increase a secondary cabinet behind cabinet, make fresh air inlet at the top of secondary cabinet, even there is pressure release passage also can install secondary cabinet additional in order to increase air-out effect.Need to solve a problem simultaneously, when fault takes place, fresh air inlet must be closed, the design solves the closing problem of heat radiation array hole by the scheme that increases burst panel, when being short-circuited fault, inside produces a large amount of gas, electric arc, the transformer case internal pressure is suddenly increased, and by the heat radiation array hole that increased pressure large impact power is closed the transformer case back, booting failure gas is derived transformer case by the exhaust vent at transformer case top.In order to increase the safe effect fresh air inlet direction of steering current must be arranged, when fault took place, even there is gas to go out the heat radiation array hole through guiding, gas sprayed to ground.

Claims

1. transformer case with ventilation explosion prevention function, it is characterized in that: directly go out a heat radiation array hole at the rear portion of transformer case, hinge is adorned a burst panel on the heat radiation array hole of transformer case inboard, this burst panel covers the heat radiation array hole fully, leave the gap that is communicated with the array hole that dispels the heat between the lower end of this burst panel and the transformer case, be shaped on exhaust vent at the top of transformer.

2. the transformer case with ventilation explosion prevention function according to claim 1 is characterized in that: the burst panel lower end by and transformer case between be supported with one row guide rod, on each guide rod, be set with a spring.

3. the transformer case with ventilation explosion prevention function according to claim 1 is characterized in that: the low speed blower fan is installed to substitute exhaust vent at the top of transformer case.