KR20120020280A - A housing of transformer pressed up cooling plate - Google Patents

Abstract

PURPOSE: A housing of a transformer with a compressed heat sink is provided to increase a cooling function of the transformer by easily circulating cooling oil filled in the housing through a flow path of the heat sink. CONSTITUTION: Several heat sinks(30) are radially arranged in a lateral plate(11) of an external box(10) of a housing. The heat sink is protruded to the outside. A tubular internal box(20) is overlapped with an intermediate inner surface of the external box. An inlet and an outlet are formed on the upper and lower sides of a groove(31). The external box and the internal box are integrated with adhesive. The groove of the heat sink is closed by a lateral plate(21) of the internal box to form a flow path of cooling oil.

Description

Housing of transformer with heat sink {A HOUSING OF TRANSFORMER PRESSED UP COOLING PLATE}

The present invention relates to a housing of a transformer in which a heat sink is pressed.

)(1)의 외주면에 여러 개의 방열판(2)(2')이 방사상의 내외 2열로 상하 연결관(3)(3')에 의해 함체(1)의 측면에 용접으로 관접(管接)되 있다. 따라서 함체(1)에서 변압기(T)에 의해 가열된 냉각오일이 상부 연결관(3)을 통하여 방열판(2)(2')의 내부로 유입되고 방열판(2)(2')에서 냉각된 냉각오일은 하부 연결관(3')을 통하여 함체(1) 내부로 순환하면서 규정된 55℃를 넘지 않도록 냉각 유지하게 되어 있다.In general, the transformer housing used in high voltage transmission of 100kv has various forms depending on the type, but basically, as shown in FIG.

On the outer circumferential surface of the (1), a plurality of heat sinks (2) (2 ') are welded to the side of the enclosure (1) by a vertical connecting pipe (3) (3') in two rows of radial inside and outside. have. Accordingly, the cooling oil heated by the transformer T in the enclosure 1 flows into the heat sinks 2 and 2 'through the upper connection pipe 3 and is cooled by the heat sinks 2 and 2'. The oil is circulated into the enclosure 1 through the lower connection pipe 3 ', and is cooled and maintained not to exceed the prescribed 55 deg.

Since the heat dissipation plate 2, 2 'of the housing of a conventional transformer is constructed to be welded to the enclosure 1 by upper and lower connecting pipes 3, 3', the pipes of the connecting pipes 3, 3 'are connected. There are many welding (m) points for contact and the connecting pipe (3) in each narrow space between the two heat sinks (2) (2 ') and between the heat sink (2) and the enclosure (1) of the inner row. Since both ends of the 3 'need to be welded one by one, there is a problem in that the workability is very poor and the production of the transformer housing is difficult.

In addition, since the inner and outer heat dissipation plates 2 and 2 'are arranged radially on the outer circumferential surface of the enclosure 1, the packaging volume is structurally increased, resulting in high transportation costs, and inherently large transformers have a heavy load. Any part of the welding (m) portion of a number of connectors (3) (3 ') when the heat sink is subjected to its own load or external pressure is applied during mounting or unloading of the transformer. Even if an internal crack occurs in, there is a problem that is difficult to find visually from the outside.

Therefore, during the installation and use of the transformer in the field without knowing such internal defects, the cracks cracked due to the expansion of minute internal cracks that gradually occurred while the material expansion and contraction of the transformer housing was repeated due to climate change of the atmosphere. As a result, the cooling oil filled in the housing of the housing may leak out of the housing, and even if the cooling oil leaks, it cannot be disconnected to replace the transformer. As a result, the cost of replacing the transformer is much greater than that of the transformer.

SUMMARY OF THE INVENTION An object of the present invention is to provide a housing of a transformer in which a heat sink is pressurized without a welding portion in a heat sink disposed radially on a main surface of the transformer housing in order to correct this conventional problem.

Another object of the present invention is a plurality of heat sinks radially disposed on the side plate of the outer housing of the transformer housing is pressed to protrude to the outside and the tubular inner box on the middle inner peripheral surface of the enclosure (內 函) ) And the heat sink is a pressurized portion of the heat sink is partially shielded by the side plate of the inner box to form a flow path with the inlet and outlet of the cooling oil at the top and bottom of the heat sink To provide a housing.

Yet another object of the present invention is that since the heat sink of the transformer housing is pressed without any welded parts, the production of the transformer housing can be made more economically and more economically and more economically. Improved durability and safety. The heat sink is to provide a housing of the pressurized transformer.

In the housing of a transformer, several heat sinks radially arranged in the side plate of the outer surface of the outer case of the housing which has the internal volume in which a transformer is accommodated are pressed so that it may protrude outside by a press mechanism.

Each press-formed heat sink is provided with a narrow and long recess toward the inside of the enclosure. In the pressurization of the heat sink, if the heat sink is first pressed into the flat plate of the side plate constituting the enclosure, then the plate is bent to construct the enclosure, the enclosure having the heat sink may be configured in a simple operation. The upper and lower lengths of the heat sinks may be in accordance with the standard specified by the specification.

The inner box has an outer diameter corresponding to the inner diameter of the enclosure so that the inner surface of the enclosure can closely overlap the inner circumferential surface thereof, and the inlet and outlet of the cooling oil are provided on the upper and lower sides of the recess of the heat sink. It has a vertical width that can shield one side of the groove.

The inner side of the enclosure is embedded in the inner circumferential surface of the enclosure and the welding points of the upper and lower edges of the enclosure side plate and the enclosure side plate between the heat sinks provided in the enclosure are integrally joined by electric welding. Therefore, one surface of the groove of the heat sink provided in the enclosure is shielded to be distinguished from the inner space of the enclosure by the inner box side plate to form a flow path of the cooling oil provided with the inlet and outlet of the oil in the upper and lower ends of the groove The housing is constructed.

)로 된 외함의 원주(圓周)의 측판 자체가 외부로 압형되어 방열판을 이루고 있기 때문에 방열판의 제작이 용이할 뿐 아니라 방열판에는 용접분이 전혀 없다. 따라서 방열판에 균열이 생길 요소가 없고 함우징에 담긴 냉각오일이 방열판 부분에서 누출될 우려가 전혀 없다.Transformer housing according to the present invention is a cylinder (桶)

Since the side plate itself of the circumference of the outer box itself is pressed to the outside to form a heat sink, not only is it easy to manufacture the heat sink but also there is no welding powder in the heat sink. Therefore, there is no element that will cause cracks in the heat sink and there is no risk of cooling oil contained in the housing leaking out of the heat sink.

In addition, the groove of the heat sink is formed by the flow path of the inlet and outlet of the cooling oil by the inner side plate of the inner surface of the enclosure.The transformer is built in the housing, the cooling oil is filled, and the cover is sealed to use the heat released from the transformer. Due to the light specific gravity of the cooling oil flows into the inlet of the heat sink and cooled by the heat sink is lowered through the flow path and circulated into the enclosure through the outlet. As this convection is repeated, the internal temperature of the transformer is kept cool so as not to exceed 55 ° C.

In addition, because the enclosure and the enclosure are double overlapped, the structural strength of the transformer housing is increased and the durability is shaped, so that the transformer housing can be used safely and longer without fear of quality deterioration even in the long term climate change.

According to the present invention, a plurality of heat sinks of a radial arrangement are squeezed outwardly and the tubular inner boxes are superimposed on the inner circumferential surface of the transformer housing, so that the grooves of the heat sink are provided with the inlet and the outlet of the heat sink. Since it is partially shielded by the flow path of the cooling oil, there is no welded portion on the heat sink, so there is no risk of cooling oil leaking during transportation and use of the transformer unlike the conventional art.

In addition, as the cooling oil filled in the transformer housing is easily circulated through the flow path of the heat sink, the cooling function of the transformer can be enhanced to safely prevent overheating of the transformer.

In addition, since the transformer housing is not structurally large in packaging volume, transportation costs can be economically reduced compared to conventional transformer housings.

In addition, since the transformer housing has a structure in which the enclosure and the enclosure are doublely overlapped, the structural strength of the transformer housing is great and the durability is improved, and thus there are various effects that can be used more safely and longer than the conventional one.

1 is a cross-sectional view of a conventional transformer housing
Figure 2 is an exploded perspective view of a cut portion of the heat sink is shown in the enclosure of the transformer housing of an embodiment of the present invention
Figure 3 is a perspective view of a part of the enclosure and the inner box of the present invention overlapped showing a state in which the flow path is configured on the heat sink
Figure 4 is a cross-sectional plan view of the housing showing the heat sink and the flow path of the present invention
5 is a cross-sectional view showing a state of use of the present invention

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, in the transformer housing H having a volume capable of accommodating the transformer T, the housing H is an enclosure 20 embedded in the enclosure 10 and the enclosure 10. ). A plurality of heat sinks 30 radially arranged by a press mechanism on the side plate 11 of the cylindrical enclosure 10 circumference is pressed. In the pressing of the heat sink 30, the heat sink 30 may be pressed against the flat plate of the enclosure side plate 11, and then the plate may be curved in a cylindrical shape to form the enclosure 10. In the inside of each of the pressurized heat sinks 30, narrow and long recesses 31 are formed toward the inside of the enclosure 10.

The inner box 20 has an outer diameter corresponding to the inner diameter of the outer box 10 and overlaps the inner circumferential surface of the side plate 11 of the outer box 10, and has a recess of the heat sink 30. 31 has an inlet 32 and an outlet 33 of the open oil at the upper and lower portions thereof, and has an upper and lower width h that can shield a part of the recess 31.

As shown in FIGS. 3 and 4, the inner plate 20 overlaps the inner inner circumferential surface of the enclosure 10 and the side plate 11 and the inner box between the heat sink 30 provided in the enclosure 10. It is made to be integrally joined by the electric welding to the welding point p of the upper edge part and the lower edge part of the side plate 21 of 20). One side of the groove 31 of the heat sink 30 is shielded from the inner space of the enclosure 10 by the side plate 21 of the enclosure 20 superimposed on the inner peripheral surface of the enclosure 10 so that The housing (H) of the transformer having a flow path of the cooling oil provided with the inlet 32 and the outlet 33 at the top and the bottom is configured.

As described above, the present invention, as shown in Figure 5, the interior of the housing (H) consisting of the enclosure 10 and the enclosure 20, the conventional transformer (T) is built up to fill the cooling oil (O) and the housing ( The cover 40 is sealed in the opening of H).

The cooling oil O whose specific gravity is reduced by the heat emitted from the transformer during the use of the transformer T flows into the inlet 32 of the heat sink 30 on the upper side of the enclosure 10. Cooling oil flowing into the recess 31 of the heat sink 30 is cooled by the heat sink 30 and descends along the flow path that is the recess 31 to the inside of the enclosure 10 through the outlet 33. Spills.

As described above, the cooling oil is repeatedly cooled through the flow path that is the recess 31 of the enclosure 10 and the heat sink 30 so as to keep the internal temperature of the transformer not to exceed 55 ° C.

In addition, since the heat dissipation plate 30 is press-molded on the side plate 11 of the enclosure 10, the heat dissipation plate 30 has no welded portion for forming a heat dissipation plate as in the prior art.

Therefore, during transportation and use of the transformer, there is no element that can cause cracks in the enclosure for any reason, so there is no fear of leakage of cooling oil, and the transformer housing (H) has a configuration in which the enclosure (10) and the enclosure (20) are overlapped in a double configuration. As a result, the structural strength of the housing is increased and its durability is improved, so that it can be used safely and longer.

DESCRIPTION OF SYMBOLS 10 Enclosure 11 Side plate 20 Enclosure 21 Side plate 30 Heat sink
31: groove 32: inlet 33: outlet H: housing T: pressure

Claims (3)

In the transformer housing (H) having a volume capable of accommodating the transformer (T), a plurality of heat sinks (30) arranged radially on the side plate (11) of the circumference of the enclosure (10) of the housing (H) Protrudingly pressurized and the tubular inner box 20 is embedded in the middle inner peripheral surface of the outer case 10, overlapping with the inner space of the heat dissipation plate 30, the inlet 32 in the upper and lower portions of the recess 31 And a transformer housing (H) having a flow path of cooling oil provided with an outlet (33). Electrical welding of the side plate 11 between the heat sink 30 provided in the enclosure 10 of the transformer housing H and the welding point P of the upper edge and the lower edge of the side plate 21 of the inner case 20 superimposed thereon. And a housing of a heat sink-type transformer characterized in that the enclosure 10 and the enclosure 20 are integrally bonded by using a high strength adhesive. The recess 31 of the heat sink 30 pressed by the circumferential side plate 11 of the enclosure 10 has one surface shielded by the side plate 21 of the inner box 20 to form a flow path for cooling oil. The housing of this pressed transformer.

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