CN102280825B

CN102280825B - Transformer cabinet with ventilation and explosion prevention functions

Info

Publication number: CN102280825B
Application number: CN201110203115.7A
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: State Grid Corp of China SGCC; 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: 2014-03-12
Anticipated expiration: 2031-07-20
Also published as: CN102280825A

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 transformer station is a lot all mounted in the metal armouring transformer case of sealing with transformer, its reason is that transformer case itself need to have 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, while breaking down in transformer case, the staff outside transformer case is damaged, thereby must meet electric arc, gas that moment of occurring in fault can produce fault, guide to the generation that human casualty accident is avoided in region that staff can not pass through.But stand, with transformer, be conventionally placed in the metal armouring transformer case of sealing, be in operation and need to produce a large amount of heats, because heat can not effectively be dispersed into transformer case accumulation and gradually outward, cause the subenvironment in the metal armouring cabinet of sealing to change, the change of this subenvironment greatly affects the normal operation of transformer for station in transformer case.

Summary of the invention

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

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, at the rear portion of transformer case, directly go out a heat sinking array hole, on the heat sinking array hole of transformer case inboard, hinge fills a burst panel, this burst panel covers heat sinking array hole completely, between the lower end of this burst panel and transformer case, leave the gap that is communicated with heat sinking array hole, at the top of transformer, be shaped with exhaust vent.

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

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

Advantage of the present invention and beneficial effect are:

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

2, this transformer case can be closed in time the heat sinking array hole after transformer case when fault occurs, and the accident that prevents from causing casualties occurs, thereby has solved the contradiction of sealing and ventilation and heat.

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

Accompanying drawing explanation

Fig. 1 is 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 is that the present invention directly makes the vertical view of exhaust vent at transformer case;

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

Embodiment

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

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

For the 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,, at the top of the attached cabinet 3 of transformer case, three high-quality low speed blower fans are installed, 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, at the top of transformer, directly make exhaust vent 9, its action principle is identical, as shown in Figure 6.

Operation principle of the present invention is:

Distribute heat when station is moved with change is normal, air themperature is raise, air expands, density diminishes, hot gas flows out via transformer case top exhaust vent, and in transformer case, pressure diminishes, and the outer pressure of transformer case is larger, transformer case is compressed in heat sinking array hole by the outer cold air of cabinet after by cabinet, thereby form a circulation, heat is taken away.If cabinet top does not have pressure release passage can consider to increase a secondary cabinet after cabinet, at the top of secondary cabinet, make fresh air inlet, even if 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 occurs, fresh air inlet must be closed, the design solves the closing problem in heat sinking array hole by increasing the scheme of burst panel, when being short-circuited fault, inside produces a large amount of gas, electric arc, transformer case internal pressure is suddenly increased, by the pressure large impact power increasing, close the heat sinking array hole after transformer case, booting failure gas is derived transformer case by the exhaust vent at transformer case top.The direction that must have guiding air-flow in order to increase safe effect fresh air inlet, when fault occurs, even if there is gas to go out the guiding of heat sinking array aperture, gas sprays to ground.

Claims

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

Burst panel lower end by and transformer case between be supported with row's guide rod, on each guide rod, be set with a spring.

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