KR20070095716A - Transformer - Google Patents

Abstract

A transformer is provided to improve an operation stability of the transformer by cooling down insulation oil at a heat discharge unit of the transformer. A transformer includes a housing(11), a transforming unit(12), an insulation oil(13), and plural heat discharge units(20). The transforming unit is arranged inside the housing and converts a first voltage from the outside to a second voltage. The insulation oil is filled inside the housing, so that the transforming unit is submerged. The heat discharge units are arranged to connect with the housing, so that the insulation oil circulates in the housing. The heat discharge unit includes an outlet tube, an inlet tube, a guide plate, and a heat discharge plate. The heat discharge plate includes plural heat radiating fins, which are formed in grooves arranged along the outlet tube. The heat radiating fin is arranged, so that the groove faces a horizontal column of a guide bump.

Description

Transformer {transformer}

1 is a perspective view showing one embodiment of a transformer according to the present invention;

2 is a partially cutaway perspective view of a heat dissipation unit of the embodiment shown in FIG. 1;

3 is a cross-sectional view of the heat dissipation unit shown in FIG. 2;

4 is a perspective view showing a heat pipe of the embodiment shown in FIG.

<Explanation of symbols for main parts of the drawings>

10; Transformer 11; A housing 12; Transformer Unit

13; Insulating oil 14; High pressure bushing 15; Low pressure bushing

20; Heat dissipation 21; Discharge line 22; Inlet pipe 23; Heat pipe

30; Guide plate 31; Guide protrusion

40; Heat sink 41; Heat dissipation fins 42; goal

The present invention relates to a transformer for ships / substations installed in substations or poles, and more particularly, to a columnar transformer with improved structure of the heat dissipation unit to cool the transformer installed in the substation or column.

On the transmission and distribution path from the power plant to the power consumer, a transformer is installed to convert the voltage to the appropriate voltage. Such transformers are installed on substations and distribution paths, and those installed on substations are called transformers for substations, and transformers installed on poles on distribution paths are called columnar transformers.

Transformers installed on such substations or poles are filled with insulating oil in the transformer for insulation and cooling purposes.

Insulating oil prevents the insulation strength from deteriorating due to moisture or dust in the transformer, and in particular, serves to radiate heat generated from the winding to the outside through the radiator.

Since overheating of the transformer may cause a power outage, the transformer needs to have a heat dissipation unit having a heat dissipation function for stable operation.

Conventional transformers are provided with a heat dissipation unit communicated with the inside of the transformer for cooling of the insulating oil stored in the transformer and installed to cool the insulating oil by heat exchange action through convection of the insulating oil.

The conventional heat dissipation unit cools the heated insulating oil through heat exchange when the two plate bodies forming the mutually uneven portions are joined to each other to form a flow path through which the insulating oil can move, and move through the flow path.

However, in the conventional radiator, heat exchange is actively performed in the part in contact with the plate of the insulating oil passing through the flow path, but the insulating oil moving at the center of the flow path formed in the heat radiating part does not perform the heat exchange to the outside smoothly. There was a case where the cooling failed.

It is an object of the present invention to provide a transformer having a radiator capable of smoothly cooling the insulating oil for cooling the heat generated in the process of transforming to the proposed in consideration of the above problems.

Transformer according to the present invention for achieving the above object is a transformer, a transformer unit is installed in the interior of the housing and transforms the first voltage drawn from the outside to output a second voltage, so that the transformer unit is installed in the housing A plurality of heat dissipating parts are installed in communication with the housing to circulate the insulating oil to be filled and the insulating oil filled in the housing on the outer circumferential surface of the housing, the heat dissipating portion is formed from the outlet formed in communication with the inside of the housing on the upper side of the housing Cooled insulating oil is introduced into the housing while passing through the heat dissipation portion through a discharge pipe forming a discharge passage of the insulating oil which is heated and discharged from the inside, and an inlet formed in communication with the inside of the housing at a predetermined distance away from the outlet. Through the inlet, outlet and inlet pipes It is coupled to communicate with the discharge pipe and the inlet pipe from the outside of the housing so as to communicate with the inside of the gong, extending in parallel with the line connecting the outlet and the inlet on the outside of the housing, the insulating oil is connected to the outlet and the inlet A plurality of guide protrusions capable of inducing flow in a vertical direction are hermetically coupled with guide plates and guide plates formed to protrude in a deterministic form at predetermined intervals in the longitudinal and transverse directions so that the insulating oil flows from the inlet pipe to the discharge pipe. An inner flow path may be formed along the path, and the inner surface of the inner surface of the guide plate may have a plurality of valleys curved in a transverse direction, and each valley may have a heat sink having a plurality of heat dissipation fins extending in the longitudinal direction. The heat sink fins are provided at the points corresponding to the longitudinal rows of the guide protrusions. It is formed to face.

In addition, the transformer is preferably further provided with a heat pipe installed on the side of the discharge pipe so that the heated insulating oil passing through the discharge pipe can be cooled by heat exchange.

Hereinafter, a transformer of a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1, a transformer 10 according to the present invention includes a housing 11, a transformer unit 12 installed inside the housing 11 to transform a voltage of electricity introduced thereto, and a housing 11 of the transformer 11. Heat dissipation installed on the outer surface of the housing 11 in communication with the housing 11 so that the insulating oil 13 and the insulating oil 13 filled so that the transformer unit 12 can be stored therein are circulated and cooled by heat exchange. The part 20 is provided.

The housing 11 has a cylindrical shape, and a high pressure bushing 14 for conductor and conductor insulation is installed on the upper surface of the housing 11 so as to transport current supplied from the outside into the transformer 10, and the reduced pressure can be output on the side thereof. The low pressure bushing 15 is installed.

A transformer unit 12 is installed inside the housing 11 to convert the high voltage electricity into electricity of a voltage used in a general home or industry.

The transformer unit 12 employs a conventional transformer method of converting a voltage through an electromagnetic induction action by varying the number of turns of the primary coil and the secondary coil.

Inside the housing 11, the insulating oil 13 is transformed into a transformer unit 12 so as to prevent the insulation strength due to dust or moisture from being deteriorated in the transformer unit 12 and to dissipate heat generated from the transformer unit 12. ) Is filled enough to be stored.

The heat dissipation part 20 is installed outside the housing 11 to communicate with the housing 11 so that the insulating oil 13 can circulate.

2 and 3, the heat dissipation unit 20 may include a discharge pipe 21 and an inlet pipe 22 installed on the side of the housing 11 and a housing (through the discharge pipe 21 and the inlet pipe 22). 11, a heat is installed on the side of the heat dissipation plate 40 and the discharge pipe 21 coupled to the guide plate 30 and the guide plate 30 to form an internal flow path through which the insulating oil 13 can flow. The pipe 23 is provided.

The discharge pipe 21 is installed to form a discharge passage through which the insulating oil 13 heated from the discharge port 21a formed on the upper side of the housing 11 is discharged from the housing 11. Since the heated insulating oil 13 rises upward in the housing 11, the discharge pipe 21 is preferably installed at the upper side of the housing 11.

The inlet pipe 22 is cooled while passing through the heat dissipation unit 20 through the inlet port 22a formed to communicate with the inside of the housing 11 at a position spaced apart from the outlet port 21a by a predetermined length in the downward direction. Is installed to be introduced back into the housing (11).

The guide plate 30 is installed outside the housing 11 to communicate with the discharge pipe 21 and the inlet pipe 22.

On the inner surface of the guide plate 30, the heat insulating plate 40 in which the insulating oil 13 introduced into the radiator through the outlet 21a is installed perpendicular to the inner surface of the guide plate 30, that is, facing the guide plate 30. The guide protrusion 31 which guides the flow of the insulating oil 13 to flow in the direction is formed.

The guide protrusion 31 is formed in a matrix form. The guide protrusion 31 installed in the lateral direction X guides the insulating oil 13 to flow into the inner flow path of the heat dissipation fin 41, which will be described later. The plurality of guide protrusions 31 formed of the heat exchanger are guided to the flow path at the point where the heat dissipation fins 41 are formed by continuously guiding the flow of the insulating oil 13 in the process of passing the insulating oil 13 through the heat dissipation unit 20. Make it more smooth.

The heat sink 40 is combined with the guide plate 30 to form a flow path through which the insulating oil 13 can flow.

The heat dissipation plate 40 and the guide plate 30 are hermetically coupled so that the insulating oil 13 does not flow out of the heat dissipation unit 20 during the passage of the heat dissipation unit 20.

On the inner surface of the heat sink 40 facing the inner surface of the guide plate 30, a plurality of valleys 42 are bent in the transverse direction X, and the valleys 42 extend a predetermined length in the longitudinal direction Y. To form a heat dissipation fin 41.

Since the position at which the valleys 42 are formed corresponds to the longitudinal direction (Y) rows of the guide protrusions 31 formed on the inner surface of the guide plate 30, the insulating oil 13 is formed on the heat dissipation fins 41 by the guide protrusions 31. Guided to flow along the flow path.

Since the heat dissipation fin 41 extends the contact surface between the insulating oil 13 flowing in the heat dissipation unit 20 and the outside air, heat exchange between the insulating oil 13 and the outside air occurs more actively, and the insulating oil 13 is a guide. Turbulent flow in the heat dissipation unit 20 by the protrusions 31 maximizes the cooling effect of the insulating oil 13.

Referring to FIG. 4, a heat pipe 23 is installed at the side of the discharge pipe 21.

The heat pipe 23 is filled with a volatile liquid therein. When heat is applied to one end of the heat pipe 23, the volatile liquid filled therein evaporates and moves to the other end with thermal energy, and then at the other end. It is intended to dissipate heat, the structure is variously known, detailed description thereof will be omitted.

By installing the heat pipe 23 in the discharge pipe 21, when the heated insulating oil 13 flows into the heat dissipation unit 20 through the discharge pipe 21, the heat pipe 23 is primarily provided through the heat pipe 23 installed in the discharge pipe 21. Thus, the heat of the insulating oil 13 is radiated to the outside.

The cooling process of the transformer 10 as described above is as follows.

The insulating oil 13 is heated by the heat generated during the transformer operation of the transformer unit 12.

The heated insulating oil 13 rises upward in the housing 11 and is discharged to the heat dissipation unit 20 through a discharge pipe 21 installed at the upper side of the housing 11.

When passing through the discharge pipe 21, the primary cooling of the insulating oil 13 is achieved by the heat pipe 23 provided in the discharge pipe 21.

The insulating oil 13 introduced into the heat dissipating part 20 through the discharge pipe 21 is radiated along the inner flow path of the heat dissipating part 20 formed by the coupling of the guide plate 30 and the heat dissipating plate 40. Pass through.

At this time, the insulating oil 13 is guided to flow along the flow path at the point where the heat radiation fins 41 are formed by the guide protrusions 31 formed on the inner surface of the guide plate 30, and the insulating oil 13 is outside the heat radiating portion 20. Is cooled through heat exchange with air.

The insulating oil 13 cooled while passing through the heat dissipation unit 20 flows back into the housing 11 through the inlet pipe 22 to cool the transformer unit 12.

The insulating oil 13 circulates through the housing 11 and the heat dissipation unit 20 and repeats the above process so that the transformer unit 12 operates stably.

The transformer of the present invention configured as described above is more effective in cooling the insulating oil in the heat radiating portion, so that the transformer can operate more stably.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (2)

housing; A transformer unit installed inside the housing and configured to transform a first voltage drawn from the outside to output a second voltage; Insulating oil filled in the transformer unit so that the transformer unit is accommodated; And And a plurality of heat dissipating parts installed on the outer circumferential surface of the housing so as to communicate with the housing so that insulating oil filled in the housing can circulate. The heat dissipation unit is a discharge pipe for forming a discharge passage of the insulating oil is heated in the interior of the housing from the discharge port formed in communication with the inside of the housing on the upper side of the housing; An inlet pipe forming an inlet path through which the cooled insulating oil is introduced into the housing while passing through the heat dissipation unit through an inlet formed in communication with the inside of the housing at a position spaced downward in a predetermined length from the outlet; It is coupled to communicate with the discharge pipe and the inlet pipe from the outside of the housing so as to communicate with the inside of the housing through the discharge pipe and the inlet pipe, is installed to extend in parallel with the line connecting the outlet and the inlet to the outside of the housing The inner surface of the guide plate is formed with a plurality of guide projections for inducing flow in a direction perpendicular to the line connecting the outlet and the inlet to protrude in a matrix form spaced apart at predetermined intervals in the longitudinal and transverse directions and It is hermetically coupled with the guide plate to form an internal flow path through which the insulating oil can flow along the path from the inlet pipe to the discharge pipe, but the inner surface opposite to the inner surface of the guide plate has a plurality of valleys bent in the transverse direction. Each valley having a heat sink having a plurality of heat sink fins extending in the longitudinal direction, The heat dissipation fin is a transformer, characterized in that formed in the valley corresponding to the point corresponding to the longitudinal row of the guide projection. The method of claim 1, The heat dissipation unit is a transformer, characterized in that further provided with a heat pipe installed on the side of the discharge pipe so that the heated insulating oil passing through the discharge pipe is cooled by heat exchange.

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