CN202523505U - Intermediate frequency furnace transformer - Google Patents

Abstract

The utility model relates to an intermediate frequency furnace transformer. The intermediate frequency furnace transformer comprises a transformer body, a radiating device and a transformer oil box provided with a box cover, wherein the transformer body is positioned in the transformer oil box which is full of transformer oil. The intermediate frequency furnace transformer is characterized in that the radiating device is a heat pipe; the heat pipe passes through the box cover of the oil box from the upper part of the oil box and is inserted into the oil box; and the heat pipe is a gravity heat pipe. By using the intermediate frequency furnace transformer, the heat in the oil box can be transferred out quickly through the heat pipe so as to keep the oil temperature stable; the intermediate frequency furnace transformer has the characteristics of high heat transfer efficiency and small size; and the service life of an arc furnace transformer is prolonged.

Description

A kind of intermediate frequency furnace transformer

Technical field

The utility model relates to a kind of transformer, relates in particular to a kind of intermediate frequency furnace transformer.

Background technology

The intermediate frequency furnace transformer is used for the transformer that matches with intermediate frequency furnace, and intermediate frequency furnace becomes single-phase DC to the three-phase alternating current electric rectification through an inverter; Be reverse into the medium-frequency pulse alternating current of a kind of 500-1000Hz then by inverter bridge; Form magnetic field through the copper band in the flue again, magnetic field makes the steel in the circle produce eddy current, and eddy current flow is crossed heated steel; Produce heat, thereby reach the purpose of melting steel.

The intermediate frequency furnace transformer is when operation, and required power is big, the overload phenomenon often occurs, and transformer heating situation is more serious, and distributing of heat makes progress.At present, intermediate frequency furnace transformer radiator structure adopts heat abstractors such as radiating tube and gilled radiator basically, adds the high wind heat radiation.This structure self is laterally bulky; Transportation and maintenance are all very inconvenient; Heat abstractor such as radiating tube and the gilled radiator heat efficiency is lower; Transformer is often because oily temperature rise is too high, causes transformer oil decreasing insulating, oil flow electrification, coil is aging even cause accidents such as fire for transformer, blast.Adopt water-cooled or air-cooled in addition, cost of equipment and operating cost are all very high.Therefore improve oily circulating transformer cooling structure, improve its cooling effectiveness, no matter from energy-saving and cost-reducing, still prolong transformer useful life, reduce hot accident aspect, all will bring the huge social economic benefit.

The utility model content

The purpose of the utility model is in order to solve the deficiency of above-mentioned prior art; A kind of technical scheme is provided, utilizes heat pipe that the intermediate frequency furnace transformer is dispelled the heat, improved cooling effectiveness with efficient heat transfer; Improved the heat dispersion of intermediate frequency furnace transformer; Occupied ground is few, and volume is little, prolongs the useful life of transformer.

A kind of intermediate frequency furnace transformer of the utility model comprises transformer body, heat abstractor and is provided with the oil tank of transformer of case lid that transformer body is positioned at the oil tank of transformer that is full of transformer oil, it is characterized in that heat abstractor is a heat pipe.

As preferably, heat pipe is the case lid through fuel tank from fuel tank top, inserts in the fuel tank.Heat pipe is positioned at the transformer top, replaces the sidepiece that original fin is positioned at fuel tank, has reduced the place of the installation of transformer greatly, and weight reduction simultaneously improves radiating effect, to reduce volume.

Heat pipe structure and operation principle: typical heat pipe is made up of shell, wick and end cap.Fill with an amount of hydraulic fluid after heat pipe is pumped into negative pressure, make in the wick capillary porous material of being close to inside pipe wall to seal behind the full of liquid.One end of pipe is evaporation section (bringing-up section), and the other end is condensation segment (cooling section), can arrange the adiabatic section according to application need two sections centres.When an end of heat pipe is heated, the vaporization of liquid evaporation in the capillary wick, steam flows to the other end and emits heat and condense into liquid under small pressure.Liquid leans on the effect of capillary force to flow back to evaporation section along porous material again, so circulates endlessly, and heat reaches the other end from an end of heat pipe.Can as required this heat pipe be made various shapes, its circulation power is that capillary materials and liquid combine formed capillary force.

As preferably, heat pipe is a gravity assisted heat pipe.

When heat pipe is in the ground gravity field, circulating of its working medium will mainly receive gravity effect.When its inclination or when vertically placing, evaporating section is in the below, and then the liquid working substance of condensation can be back to evaporation section by gravity up, Here it is gravity assisted heat pipe.Gravity assisted heat pipe and premium properties gravity assisted heat pipe thereof are to rely on the gravitational field effect of intraductal working medium and form and circulate.Owing to not be used in and add wick in the pipe; Its manufacturing cost reduces greatly; And its working medium can water, because glassware for drinking water has good physical property and economy heat pipe working temperature generally between O～25O ℃, so it has obtained using widely in practical engineering application.It has following good characteristic: (1) the very high inner main vapour of hydraulic fluid, liquid phase leaned on of thermal conductivity gravity assisted heat pipe becomes heat transfer, and thermal resistance is very little, therefore has the very high capacity of heat transmission.Test shows that gravity assisted heat pipe is compared with the radiating efficiency of the identical copper pipe of physical dimension, and the efficient raising reaches about 2O times.(2) simple in structure, easily manufactured, with low cost, and the life-span is long, can use about 2O generally speaking.(3) start-up temperature is low, when thermal source is 3O ℃, can start, and the temperature difference is high-power more high more, therefore is fit to very much be applied in the transformer.

The beneficial effect of the utility model is: the utility model can be gone out the heat transferred in the fuel tank rapidly through heat pipe, to keep the oil temperature stable, has heat transfer efficiency height, the less characteristics of volume, has prolonged the useful life of intermediate frequency furnace transformer.

Description of drawings

Below in conjunction with accompanying drawing and embodiment utility model is further specified.

Fig. 1 is the contour structures sketch map of the utility model embodiment.

Among the figure: 1, fuel tank 2, low-tension bushing 3, bushing 4, transformer oil 5, gravity assisted heat pipe.

Embodiment

As shown in Figure 1, the utility model embodiment is a kind of intermediate frequency furnace transformer, comprises fuel tank 1 casing.The lead-out wires of coil of transformer body is drawn out to the outside through bushing 3, low-tension bushing 2 and shunting switch respectively.The effect of bushing shell for transformer is the inner high and low pressure of transformer to be guided to fuel tank 1 outside, not only conduct lead-in wire insulation against ground, and the effect of undertaking anchor leg.In the oil tank of transformer 1 is transformer body, and transformer body is immersed in the transformer oil 4, and gravity assisted heat pipe 5 is the case lid through fuel tank from fuel tank top, inserts in the fuel tank 1.Gravity assisted heat pipe 5 is positioned at the transformer top, replaces the sidepiece that original fin is positioned at fuel tank, has reduced the place of the installation of transformer greatly, and weight reduction simultaneously improves radiating effect, to reduce volume.Transformer when transformer upper strata oil temperature produces the temperature difference, can be gone out the heat transferred in the fuel tank rapidly through gravity assisted heat pipe 5 in use; To keep the oil temperature stable; Have the heat transfer efficiency height, volume is less, the characteristics that cost is low have prolonged useful life of transformer.Gravity assisted heat pipe 5 is made simply than other kind heat pipe low price, places several and gets final product.Every heat pipe all is an absolute construction, does not have the leakage of oil problem, and the life-span is long.Gravity assisted heat pipe himself is an autonomous system to good environmental adaptability, can make arbitrary shape, is fit to be applied in the various environment, and this is its prime advantage place just.

The foregoing description is the explanation to the utility model, is not the qualification to the utility model, and any structure after simple transformation on the utility model basis all belongs to the protection range of the utility model.

Claims (1)

1. intermediate frequency furnace transformer comprises transformer body, heat abstractor and is provided with the oil tank of transformer of case lid that transformer body is positioned at the oil tank of transformer that is full of transformer oil, it is characterized in that heat abstractor is a heat pipe; Heat pipe is the case lid through fuel tank from fuel tank top, inserts in the fuel tank; Heat pipe is a gravity assisted heat pipe.

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