CN203799831U

CN203799831U - Oil-immersed transformer

Info

Publication number: CN203799831U
Application number: CN201420110758.6U
Authority: CN
Inventors: 屠昌益
Original assignee: Su Change (xuzhou) Electric Co Ltd
Current assignee: SUBIAN ELECTRIC CO., LTD.
Priority date: 2014-03-12
Filing date: 2014-03-12
Publication date: 2014-08-27
Anticipated expiration: 2024-03-12

Abstract

The utility model relates to an oil-immersed transformer. The oil-immersed transformer comprises a transformer box, cooling oil, a coil winding and a high-voltage wire connection assembly, wherein the transformer box is filled with the cooling oil, and the coil winding is immersed in the cooling oil. The coil winding is composed of an iron core and a coil tightly wound on the surface of the iron core. The iron core is formed by stacking a plurality of silicon steel sheets. Diversion trenches for cooling oil to flow through are formed in the surface, making contact with the coil, of the iron core at intervals, and the coil strides over the diversion trenches. The diversion trenches are formed in the iron core of the oil-immersed transformer, the cooling oil can flow through the diversion trenches, and thus the main heat generating body, namely the iron core, can be effectively cooled. The cooling effect of the cooling oil on the winding is enhanced, and the working stability of the transformer is further guaranteed.

Description

A kind of oil-filled transformer

Technical field

The utility model relates to a kind of transformer, is specifically related to a kind of oil-filled transformer that improves cooling effectiveness.

Background technology

Oil-filled transformer is the significant components of transformer station, and oil-filled transformer is generally arranged in independent transformer room.Rely on oil to make coolant, as oil, oil, oil immersed water cool and forced oil-circulation etc.The main transformer of general booster stations is all oil immersed type, no-load voltage ratio 20KV/500KV, or 20KV/220KV, general power plant is for being with self load (such as coal pulverizer, induced draft fan, forced draft fan, circulating water pump etc.) station transformer be also oil-filled transformer, its no-load voltage ratio is 20KV/6KV.

Therefore, unit and industrial and mining enterprises all will configure transformer, particularly smelting industry, and the transformer capacity of use is quite large, and smelting furnace uses large electric current, and smelting quality is good, and furnace temperature is high, is extensively adopted by people always.Although but in use people also find that existing transformer capacity is large, electric current is strong, but also there is certain weakness, adopt large current work just because of smelting furnace, full-load run, will certainly cause transformer core seriously to generate heat, the conduction of insulating oil heat only depends on the heat radiation of transformer self-radiating sheet, under having ready conditions, can install blower fan blowing additional and carry out cooling, temperature is also difficult for controlled, temperature often can reach depreciation, often cause Buchholz relay action, force transformer auto-breaking, therefore, due to transformer power-off, in body of heater, temperature declines, material body solidifies, damage equipment causes stop work and production, directly cause heavy economic losses to country.Therefore people add note cold oil to lower the temperature to transformer and as the winding of critical piece to transformer inside, but between current coil and iron core, winding is closely abnormal, by insulating oil cooling only can carry out the surface of winding cooling, on the contrary can not effective cooling for the winding inside as thermal source.

Utility model content

The technical problems to be solved in the utility model is: propose a kind of can be to the oil-filled transformer of winding inside effective cooling.

The utility model is that the technical scheme that solves the problems of the technologies described above proposition is: a kind of oil-filled transformer, comprise transformer-cabinet, be filled in cold oil in described transformer-cabinet, be immersed in coil windings and high-voltage line wiring assembly in described cold oil, described coil windings is by iron core and tightly forms around the coil on described iron core surface, described iron core forms by many places silicon steel sheet is stacked, the spaced apart guiding gutter flowing through for cold oil that is provided with in surface that described iron core contacts with described coil, described coil strides across from described guiding gutter.

Further, described transformer-cabinet both sides are all connected with the U-shaped cold oil pipeline with its internal run-through, the oil-out place that described U-shaped cold oil pipeline is positioned at described transformer-cabinet inside is connected with oil circulating pump, described oil circulating pump go out the length direction of oil burner nozzle towards described guiding gutter.

Further, the bottom land of described guiding gutter is the dark arc in shallow middle part, two ends, and the dual-side of described guiding gutter is mutually being drawn close gradually in direction of both ends.

The beneficial effects of the utility model are:

In the utility model, on the iron core of oil-filled transformer, offer guiding gutter, cold oil can flow through from this guiding gutter, thereby can effectively give, main heater---iron core is lowered the temperature.Strengthen the cooling-down effect of cold oil to winding, also further ensured in addition the job stability of transformer in the utility model.

Brief description of the drawings

Below in conjunction with accompanying drawing, oil-filled transformer of the present utility model is described further.

Fig. 1 is the external structure schematic diagram of oil-filled transformer in the utility model.

Fig. 2 is the structural representation of pitch of the laps winding.

Fig. 3 is the cross-sectional view of guiding gutter.

Embodiment

Shown in Fig. 1 and Fig. 2, the oil-filled transformer in the utility model, comprises transformer-cabinet 1, is filled in cold oil in described transformer-cabinet 1, is immersed in coil windings and high-voltage line wiring assembly in described cold oil.

Described coil windings is by iron core 2 and tightly forms around the coil 3 on described iron core 2 surfaces, described iron core 2 forms by many places silicon steel sheet is stacked, the spaced apart guiding gutter 4 flowing through for cold oil that is provided with in surface that described iron core 2 contacts with described coil 3, described coil 3 strides across from described guiding gutter.

Described both sides are all connected with the U-shaped cold oil pipeline 5 with its internal run-through, and the oil-out place that described U-shaped cold oil pipeline 5 is positioned at described transformer-cabinet 1 inside is connected with oil circulating pump, described oil circulating pump go out the length direction of oil burner nozzle towards described guiding gutter 4.

As shown in Figure 3, the bottom land of described guiding gutter 4 is the dark arc in shallow middle part, two ends, and the dual-side of described guiding gutter 4 is mutually being drawn close gradually in direction of both ends.

The above-described embodiment that is not limited to of the present utility model; the technical scheme of above-mentioned each embodiment of the present utility model can combined crosswise form new technical scheme each other; all employings are equal to the technical scheme of replacing formation in addition, all drop in the protection range of the utility model requirement.

Claims

1. an oil-filled transformer, comprise transformer-cabinet, be filled in cold oil in described transformer-cabinet, be immersed in coil windings and high-voltage line wiring assembly in described cold oil, it is characterized in that: described coil windings is by iron core and tightly forms around the coil on described iron core surface, described iron core forms by many places silicon steel sheet is stacked, the spaced apart guiding gutter flowing through for cold oil that is provided with in surface that described iron core contacts with described coil, described coil strides across from described guiding gutter.

2. oil-filled transformer according to claim 1, it is characterized in that: described transformer-cabinet both sides are all connected with the U-shaped cold oil pipeline with its internal run-through, the oil-out place that described U-shaped cold oil pipeline is positioned at described transformer-cabinet inside is connected with oil circulating pump, described oil circulating pump go out the length direction of oil burner nozzle towards described guiding gutter.

3. oil-filled transformer according to claim 1, is characterized in that: the bottom land of described guiding gutter is the dark arc in shallow middle part, two ends, and the dual-side of described guiding gutter is mutually being drawn close gradually in direction of both ends.