KR20160049797A - Appratus of cooling of transformer of housing - Google Patents

Appratus of cooling of transformer of housing Download PDF

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Publication number
KR20160049797A
KR20160049797A KR1020140147459A KR20140147459A KR20160049797A KR 20160049797 A KR20160049797 A KR 20160049797A KR 1020140147459 A KR1020140147459 A KR 1020140147459A KR 20140147459 A KR20140147459 A KR 20140147459A KR 20160049797 A KR20160049797 A KR 20160049797A
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KR
South Korea
Prior art keywords
pipe
cooling
tube
heat
heat dissipating
Prior art date
Application number
KR1020140147459A
Other languages
Korean (ko)
Inventor
이영재
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이영재
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Publication date
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Priority to KR1020140147459A priority Critical patent/KR20160049797A/en
Publication of KR20160049797A publication Critical patent/KR20160049797A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)

Abstract

The present invention relates to an apparatus for cooling a transformer housing. A cooling pipe configured as a corrugate pipe or spiral pipe smaller than an inner diameter of a radiation pipe is dually formed within the radiation pipe with a space for a flow path interposed therebetween. An annular cap is bonded to both end portions of the radiation pipe and the cooling pipe with air through hole, or both end portions of the radiation pipe and the cooling pipe overlap and the overlapping portions are interlocked to fix the cooling pipe in a central portion of the radiation pipe. A flow path of a predetermined space is vertically formed between the radiation pipe and the cooling pipe, and an upper outlet pipe and a lower inlet pipe provided in the radiation pipe are positioned to be adjacent to an oil outlet and oil inlet respectively formed on an upper circumferential surface and a lower circumferential surface of the transformer housing. According to the present invention, as cooling oil accommodated in the transformer housing easily circulates along the flow path formed between the radiation pipe and the cooling pipe, oil within the transformer housing can be easily cooled according to combination of a radiation operation of the radiation pipe with an increased radiation surface and a radiation operation of the cooling pipe increased by the corrugate pipe provided as an air passage.

Description

[0001] APPARATUS OF COOLING OF TRANSFORMER OF HOUSING [0002]

The present invention relates to a cooling device for a transformer housing, in which a corrugated pipe having a through-hole of air smaller than the inner diameter of the heat-dissipating pipe is formed inside the heat-releasing pipe, or a cooling pipe made of a helical pipe is formed in a double- A cooling cap is fixed to the central portion of the heat-radiating tube, and the heat-radiating tube and the cooling tube are connected to each other by overlapping both end portions of the heat-radiating tube and the cooling tube, And an upper outlet pipe and a lower inlet pipe provided in the heat dissipating pipe are respectively connected to an oil outlet and an inlet formed on the upper and lower surfaces of the transformer housing.

According to the present invention, the cooling oil contained in the transformer housing is easily circulated along the flow path formed between the heat-radiating pipe and the cooling pipe, so that the heat-radiating action of the heat- The inner oil of the transformer housing can be easily cooled by the combination of heat radiation action of the tube.

Generally, in order to dissipate the heat generated from the transformer coil, the transformer has a plurality of heat dissipating plates radially formed on the outer circumferential surface of the housing to cool the housing body.

An example of the prior art of the cooling means of the transformer housing is as follows,

Japanese Patent Application Laid-Open No. 10-1142560 discloses a transformer housing having a volume capable of accommodating a transformer, in which a plurality of radial heat radiating plates are protruded outwardly from a circumferential side plate of an outer enclosure of a housing, The tubular inner housing is built in a superimposed manner so that one side of the groove of the heat dissipating tube is shielded by the side plate of the inner housing and the inlet and the outlet are provided at the upper and lower portions of the groove to form the cooling oil.

[0004] Japanese Patent Application Laid-Open No. 10-1216863 (published Dec. 28, 2012) discloses a heat exchanger having a plurality of open upper and lower main surfaces corresponding to the number of heat dissipating tubes at regular intervals, through which cooling oil flows in and out of the outer circumferential surface of a transformer housing, A transformer housing coupled to a heat radiating plate formed in a radial pattern, the transformer housing having a spiral cooling tube vertically penetrating the upper portion of the heat sink, and cooling the transformer housing by heat radiation of the heat sink and the cooling tube. The oil is cooled better than the conventional one and used for a long time.

The present invention is advantageous in that a cooling tube is vertically passed through the inside of the heat sink to increase the cooling effect by the cooling tube. However, since one surface of the heat sink also serves as an outer circumferential surface of the transformer housing, And the cooling function of the heat sink is not so high because the heat insulating function can not be performed in the portion where the surface is interposed.

In order to further enhance the heat radiating action of the heat radiating plate of the above-mentioned cited invention, the present invention relates to a cooling tube having a smaller diameter than the inner diameter of the heat radiating tube, And both ends of the heat-radiating tube and the cooling tube are welded with an annular cap, or both ends of the heat-radiating tube are formed into an inclined surface whose inner diameter gradually becomes smaller toward the center, The both ends of the tube and the both ends of the cooling tube are overlapped with each other and the overlapped portion is fitted with a seamer so that the cooling tube is fixed to the center of the heat radiating tube to form a constant up and down flow path space, And the lower outlet pipe is formed by joining the oil soccer formed on the outer peripheral surface of the housing and the outlet port

Since the heat dissipating tube is isolated from the housing, the heat dissipating surface is more increased than that of the heat dissipating plate which has been used as the outer circumferential surface of the conventional housing, the oil path can be constant, A new transformer housing in which the cooling oil contained in the transformer housing can be easily cooled while circulating along the flow path of the heat pipe by the action of the radiating action of the cooling tube whose surface is enlarged by the corrugated tube circulated through the air passage, Cooling system.

An object of the present invention is to provide a cooling device for a transformer housing in which the upper outlet pipe and the lower inlet pipe of a tubular heat dissipating pipe are in contact with an oil outlet and an inlet of a transformer housing to increase a heat dissipating area of the heat dissipating pipe isolated from the housing have.

It is another object of the present invention to provide a cooling device for an air conditioner, comprising: a cooling tube formed of a hollow tube or a helical tube having air holes smaller than the inner diameter of the heat- The cooling function of the transformer housing can be further enhanced by the combination of the cooling action of the cooling tube circulated through the through hole.

It is a further object of the present invention to provide a heat pipe and a cooling pipe which are formed so as to form a flow path between the heat radiating pipe and the cooling pipe by welding an annular cap to the upper and lower ends of the heat radiating pipe and the cooling pipe, And a cooling device for the transformer housing in which the tube is fixed.

It is a further object of the present invention to provide a heat pipe and a cooling pipe which are formed in a double-layer structure so as to form a flow path, wherein an upper end portion and a lower end portion of the heat pipe are overlapped with each other by seaming, And a cooling device for the transformer housing in which the formed cooling tube is fixed.

It is still another object of the present invention to provide a cooling apparatus for a transformer housing that is physically protected by a heat radiating tube formed inside the heat radiating tube so that the cooling apparatus can be safely used without being damaged during transportation and handling of the transformer .

In the present invention, a plurality of heat dissipating plates are radially formed on the outer circumferential surface of the housing, and the oil contained in the housing is cooled by the heat dissipating plate,

An oil outflow pipe and an oil outflow pipe formed on the upper and lower sides of the circumferential surface of the transformer housing so as to have an oil outlet and an inlet port by an upper and a lower pair corresponding to the number of the heat radiating pipes and protruding laterally at the upper and lower ends of the tubular heat- An inlet pipe is in communication with the oil outlet of the housing and the oil inlet.

A cooling tube formed of a hollow tube having a through hole having a smaller diameter than the inner diameter of the heat dissipating tube or a helical tube formed in the center of the heat dissipating tube is formed in a double space with a space of the flow path and cooling oil contained in the transformer housing, The cooling oil can be easily cooled by the radiating action of the radiator of the heat radiating tube isolated from the housing while being circulated through the cooling tube and the heat radiating action of the cooling tube whose air circulating to the through hole is circulated by the cooling tube will be.

The heat dissipation tube is connected to the outer circumferential surface of the transformer housing by an upper outlet pipe and a lower end inlet pipe so that the heat dissipation pipe is ventilated from the housing.

In addition, when a heat radiating tube and a cooling tube having an air passage formed therein are formed in a double shape, an annular cap is attached to the upper and lower ends of the heat radiating tube and the cooling tube, And a cooling pipe is connected to the cooling pipe.

The annular cap fixes the cooling tube to the center of the heat dissipating tube so that a flow path is formed between the cooling tube and the heat dissipating tube in a vertical space and the space of the flow path is not partially adhered or displaced.

When the heat radiating tube and the cooling tube are formed in a double shape, the inner diameter of the upper and lower ends of the heat radiating tube is gradually reduced toward the central portion so that both upper and lower ends of the heat radiating tube and the upper and lower ends of the cooling tube, And the overlapped portions are joined by a seamer.

A cooling pipe is fixed to the central portion of the heat-radiating pipe by inclined surfaces formed at both ends of the heat-radiating pipe, so that a constant flow path space is secured between the heat-radiating pipe and the cooling pipe.

When the cooling pipe is fixed to the central portion of the heat-radiating pipe, the through-hole of the cooling pipe penetrates vertically through the central portion of the heat-radiating pipe, thereby facilitating circulation of air through the through-hole.

Further, when both end portions of the heat-radiating tube and the cooling tube are joined by the seamer, since there is no deterioration of the material as compared with welding, the heat-radiating tube can be formed more warrantly and workability is good.

According to the present invention configured as described above, the oil contained in the transformer housing is heated according to the heat generated by the transformer coil, and the heated oil flows out to the outflow pipe of the upper side of the housing and the outflow pipe of the heat pipe, Heat dissipation by the tubular heat pipe in the circulation process flowing into the inflow and inflow side of the lower side. The oil can be easily cooled by the combination of the heat radiating action of the cooling pipe that is increased by the corrugated tube in which the air is circulated through the through hole, thereby efficiently cooling the transformer housing.

In addition, since the structure of the heat-radiating tube is simple and robust, and the cooling tube is physically protected from the outside by a rigid heat-radiating tube even when the cooling tube is formed of a thin metal plate such as aluminum or copper plate, There is no risk of damage to the pipe.

In addition, since the heat radiating and cooling cooling tubes are formed in the same tubular shape, when the annular cap of the heat radiating tube is welded, the cooling tube is fixed to the center of the heat radiating tube, As shown in FIG.

In addition, since the heat radiating tube and the cooling tube have a circular cross section, both end portions of the heat radiating tube can be formed as inclined surfaces, and the overlapped portions can be overlapped with the end portions of the cold hearth tube and can be easily joined to the seamer.

The end portion of the heat radiating pipe fitted by the shearing machine is formed more firmly and does not deteriorate the metal material as compared with the welding, and the workability is good, so that the heat radiating pipe can be produced in a more efficient manner.

If the heat pipe is easily produced, the production cost of the transformer housing can be reduced as well.

Since the upper outlet pipe and the lower inlet pipe of the tubular heat dissipating tube are insulated from the housing at the oil outlet and inlet of the transformer housing, the heat dissipating area of the tubular heat dissipating pipe is further increased.

In addition, since a corrugated pipe or a helical tube, in which a through hole of air having an inner diameter smaller than the inner diameter of the heat-radiating tube is formed in the heat-radiating tube, is formed in a double space with the space of the flow path, The cooling action of the transformer housing can be further enhanced by the combination of the cooling action of the cooling tube circulated to the transformer housing.

In addition, when the heat radiating tube and the cooling tube are double formed so as to form a flow path, an annular cap is welded to the upper end and the lower end of the heat radiating tube and the cooling tube so that the cooling tube is fixed to the center of the heat radiating tube, So that the oil can be smoothly circulated along the oil passage.

Further, when the heat radiating tube and the cooling tube are formed so as to form a flow path, the heat radiating tube and the lower and upper ends of the radiating tube are overlapped with each other by seaming so that the cooling tube is fixed to the center of the heat radiating tube It is possible to secure a space with a constant flow path and to firmly bond without deterioration of the joint portion.

In addition, since the cooling pipe formed by the heat pipe is physically protected, the cooling device is not damaged during transportation and handling of the transformer, and there are various effects that can be used more safely.

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Figure 2 is a cross-
3 is a cross-sectional enlarged view of the heat-
Fig. 4 is a welding example of the end portion of the heat-
Fig. 5 is an enlarged end view of the heat-
Fig. 6 is an enlarged view showing an end portion of the heat dissipating tube of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figs. 1 and 2, in the transformer housing H, the oil outlets 1u and 1u are provided on the upper and lower sides of the circumferential surface of the housing body 1 in pairs corresponding to the number of the heat radiation pipes, An oil outflow pipe 2u and an oil inflow pipe 2n formed so that the inlet ports 1n are formed at regular intervals and are laterally projected from the upper end and the lower end of the tubular heat dissipating pipe 2 are connected to the oil outlet 1u and the inlet 1n and welded to the body 1 by welding.

As shown in Figs. 3 and 4, a corrugated tube or air tube 3h having an air hole 3h with an inner diameter d smaller than the inner diameter D of the heat dissipation tube is formed inside the heat dissipation tube 2 The cooling tube 3 penetrates up and down so that the upper end 2a and the lower end 2b of the heat dissipating tube 2 and the upper end 3a and the lower end 3b of the cooling tube 3 are fitted with an annular cap 4, The end portions 2a and 2b of the heat dissipating tube 2 are welded to the outer periphery of the cap 4 and the end portions 3a and 3b of the cooling tube 3 are welded to the inner peripheral portion of the cap 4, The cooling tube 3 is fixed to the central portion of the heat dissipating tube 2 by the width f of the annular cap 4 and the difference in inner diameter between the heat dissipating tube 2 and the cooling tube 3 A flow path 5 having a constant vertical space is formed between the heat dissipating tube 2 and the cooling tube 3 at a distance D> d.

5 and 6 show an example in which the upper end 2a and the lower end 2b of the heat dissipating tube 2 are formed of a sloped surface t having a predetermined angle a whose inner diameter gradually becomes smaller toward the center, The upper and lower ends 3a and 3b of the cooling tube 3 in which the upper and lower ends 2a and 2b of the cooling tube 3 and the air passage 3h are formed are overlapped as shown by the dotted line in FIG. Is seamed so that the cooling pipe 3 is fixed to the central portion of the heat dissipating tube 2 by the fitting portion S so that a space between the heat dissipating tube 2 and the cooling tube 3, (5) are formed.

The thickness of the metal plate forming the cooling pipe 3 is about 1/2 of the thickness of the metal plate used to form the heat dissipating tube 2.

Of course, it is possible to use a metal plate of the same material having the same thickness as the heat dissipating tube 2 and the cooling tube 3, or a different metal plate such as a steel plate for the heat dissipating tube 2 and a copper plate, A stainless steel plate, an iron plate, or the like may be used.

Since the cooling tube 3 is formed of a corrugated tube or a helical tube, the surface of the cooling tube 3 is increased by about twice as much as the tube without a corrugated tube, and the through hole 3h is formed therein. do.

In addition, since the cooling hole 3h is vertically passed through the center of the cooling pipe 3, when the cooling pipe 3 is positioned vertically, the air can circulate up and down through the through hole 3h.

The oil o contained in the body 1 of the transformer housing H is heated in accordance with the heat generated by the transformer coil and the heated oil flows through the housing body 1 as shown in FIG. And flows out to the outflow pipe 2u of the upper side outlet 1u and the heat radiation pipe 2 and flows through the flow path 5 between the heat radiation pipe 2 and the cooling pipe 3 via the inflow pipe 2n and the inflow pipe The oil is easily cooled by the heat radiation of the cooling tube 3 formed with the heat radiation function of the heat radiation pipe 2 and the passage 3h through which the air is circulated in the circulation process of flowing into the heat exchanger 1n to cool the transformer housing.

In other words, since the heat dissipating tube 2 is isolated from the housing body 1 by the outflow tube 2u and the inflow tube 2n, the heat dissipating tube 2 is welded to the main surface of the body 1 The heat dissipating area of the heat dissipating tube 2 is increased so much that the cooling action is further improved.

Since the cooling tube 3 is formed of a corrugated tube or a helical tube, the heat dissipating area through the through hole 3h is further increased, and by the combination of the cooling action by the cooling tube 2 and the heat dissipating tube 3 The heat dissipation function is better than that of the conventional transformer housing.

In addition, the structure of the heat dissipating tube 2 is simple and robust, and the cooling tube 3 is physically protected by the solid heat dissipating tube 2 even if a thinner metal plate is used than the heat dissipating tube 2 There is no possibility that the cooling pipe 3 is damaged during the transportation and handling of the transformer housing.

Since both end portions 2a and 2b of the heat dissipating unit 2 and both end portions 3a and 3b of the cooling pipe 3 have a circular cross section and are welded by the annular cap 4 neatly, And the cooling tube 3 is fixed to the center of the heat dissipating tube 2 so that the flow path 5 of a certain space is secured inside the heat dissipating tube so that the oil can be easily circulated and the cooling effect is improved.

The both end portions 2a and 2b of the heat dissipating tube 2 having a circular cross section and the both end portions 3a and 3b of the cooling tube 3 are superposed on each other and are easily joined and joined to each other by a seamer, The cooling pipe is fixed to the center of the heat pipe, and a flow path 5 having a predetermined space is formed inside the heat pipe.

Since the heat dissipating tube and the cooling tube are joined by joining both ends of the cooling tube, there is no deterioration of the metal material as compared with welding, and the heat dissipating tube 2 in which the air passage 3h and the flow path 5 are formed can be more efficiently Can produce

Also, the Euro is safely sealed, so there is no risk of oil leaking all weather.

As a result of measuring the oil temperature measured 3 days after the start of operation of the transformer by filling the oil with the specification of the transformer housing according to the present invention, the temperature of the oil contained in the transformer housing is 42 To 44 ° C, confirming that the cooling effect is better than the specified temperature of 45 ° C.

1: Fuselage 1n: Inlet 1u: Outlet
2: heat dissipating tube 2a: upper end of the heat dissipating tube, 2b: lower end of the heat dissipating tube
2n: inlet pipe 2u: outlet pipe
3: cooling pipe 3a: upper end of cooling pipe 3b: lower end of cooling pipe
3h: through-hole of air 4: annular cap
H: Transformer housing S: Mating part
o: oil f: width of the cap t: inclined surface of the end of the heat radiating tube

Claims (3)

A cooling device for a transformer housing,
An oil outflow pipe and an oil inflow pipe provided in the upper and lower ends of the heat radiating pipe are disposed in the oil inflow port and the oil inflow port provided in the inner circumferential surface of the transformer housing and air is introduced into the center of the heat radiating pipe And a cooling tube made of a helical tube are doubly joined to each other through a space of the flow path so that cooling oil contained in the transformer housing is circulated through the flow path of the heat dissipation tube, And is cooled by the heat radiation action of the cooling tube. The method of claim 1, wherein
The upper end 3a and the lower end 3b of the cooling tube 3 in which the upper end 2a and the lower end 2b of the heat dissipating tube 2 are joined to the outer peripheral edge of the annular cap 4 and in which the air hole 3h is formed, Is attached to the inner periphery of the annular cap 4 so that the cooling tube 3 is fixed to the center of the heat dissipating tube 2 and the through hole 3h of the cooling tube 3 is provided at the center of the heat dissipating tube 2 Characterized in that a flow path (5) is formed in the upper and lower portions and is vertically spaced from the cooling pipe (3) between the heat dissipating pipe (2) and the cooling pipe (3). The method of claim 1, wherein
The upper end 2a and the lower end 2b of the heat dissipating tube 2 and the lower end 2b of the heat dissipating tube 2 which are superimposed on each other are formed with inclined surfaces t whose inner diameters gradually become smaller toward the center, The upper end portion 3a and the lower end portion 3b of the heat dissipating tube 3 in which the through holes 3h of the heat dissipating tube 3h are formed are seamed and the cooling tube 3 is fixed to the center portion of the heat dissipating tube 2, Wherein a through hole (3h) of the cold hearth (2) is vertically passed through the central portion of the heat pipe (3) and the cooling pipe (3).
KR1020140147459A 2014-10-28 2014-10-28 Appratus of cooling of transformer of housing KR20160049797A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108511159A (en) * 2018-05-24 2018-09-07 河南森源电气股份有限公司 Oil-immersed transformer and its radiator
CN110993266A (en) * 2019-12-23 2020-04-10 国网河南省电力公司西峡县供电公司 Heat dissipation type transformer for power transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108511159A (en) * 2018-05-24 2018-09-07 河南森源电气股份有限公司 Oil-immersed transformer and its radiator
CN110993266A (en) * 2019-12-23 2020-04-10 国网河南省电力公司西峡县供电公司 Heat dissipation type transformer for power transmission

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