KR102343178B1 - Solid insulation transformer - Google Patents

Abstract

The present invention is a solid insulation transformer comprising a transformer body having four side perimeters and connected to at least one side of the transformer from the upper side, wherein the side perimeter of the transformer body and the lower part of the transformer body are subjected to physical impact from the outside. It relates to a solid insulation transformer to which a protection frame to prevent damage and a support means structure to prevent the flow of low voltage cables is applied.

Description

SOLID INSULATION TRANSFORMER

The present invention relates to a solid insulation transformer installed in an underground structure, and more particularly, to a solid insulation transformer to which a protection frame for preventing damage to a transformer body and a support means structure for preventing the flow of a low voltage cable are applied.

Figure 1a is a picture substitute for a picture showing the damage state of the enclosure of a general oil immersed transformer for underground use, and Figure 1b is a picture substituted for a diagram showing a solid insulation transformer for underground use to compensate for the shortcomings of the oil immersion transformer for underground use.

First, the underground transformer is installed in a concrete manhole or Vault, which is an underground structure. In general, oil-immersed transformers using insulating oil are widely used for underground applications. However, depending on the installation area, the inflow of polluted water and the inflow of chemical components, as shown in Fig. 1a, corrode the enclosure of the oil-in-water transformer, and the insulation oil inside the oil-intake type underground transformer leaks causing an insulation accident, or a fire caused by an insulation accident and environmental pollution caused by insulating oil. Therefore, even if the material of the enclosure is made of stainless steel and anti-rust coating is applied to the surface of the enclosure, it is not possible to fundamentally block the occurrence of corrosion.

As a countermeasure to the above problems, as shown in Fig. 1b, a solid insulation structure that does not use liquid insulating oil is applied and the transformer body 1 is assembled with a non-metallic polymer enclosure that does not cause external corrosion. A product to which a metal frame 2 for handling is applied has been developed.

However, the polymer enclosure as described above does not cause corrosion, but there is a possibility that the transformer body may be damaged due to external impact during loading and unloading, transportation, and installation of the product.

In addition, in the underground structure where the transformer is installed, the transformer installation location is lower than the worker's eye level, and the light is blocked and dark in the underground structure than in the outdoor environment. It is a condition that is difficult to ascertain in detail.

Accordingly, there is a need for structural improvement in order to solve the problem that the transformer body, particularly the enclosure constituting the exterior of the transformer body, is damaged by a physical impact.

(0001) Domestic Registered Patent No. 10-1571471

The technical problem to be solved by the present invention is a solid insulation transformer in which a structure of a protective frame is applied to the periphery of the side and the lower part of the transformer body in order to prevent the transformer body from being damaged by physical shocks that may occur during the installation of the underground transformer. is to provide

Another technical problem to be solved by the present invention is to apply a structure of a support means for firmly supporting a low-voltage cable in order to prevent the transformer body from being damaged in the process of installing an underground transformer, in particular, in the process of holding and handling the low-voltage cable. To provide an isolation transformer.

Another technical problem to be solved by the present invention is to provide a solid insulation transformer having a structure in which heat dissipation efficiency is improved while maintaining the protective function of the transformer body because heat dissipation is not smooth due to the characteristics of the dry type transformer.

A solid insulation transformer of the present invention for achieving the above technical object is a solid insulation transformer comprising a transformer body having four side perimeters and a low voltage cable connected to at least one side from the upper portion, the side perimeter of the transformer body and It is characterized in that the lower portion is provided with a protection frame for preventing the transformer body from being damaged by a physical impact with the outside.

In addition, the protection frame, the base frame for supporting the lower periphery of the transformer body; a first frame connected to the base frame and positioned at the side corners of the transformer body, respectively; a second frame coupled between each of the first frames, the second frame being spaced apart from the transformer body at a predetermined distance to surround the periphery of the side of the transformer body; and a third frame positioned under the transformer body and coupled to each of the base frames.

In addition, at least one of the first frame and the second frame, a fourth frame for supporting the upper portion of the transformer body so that the transformer body is supported inside the protection frame; characterized in that it is further provided.

In addition, the second frame is composed of a plurality, characterized in that coupled to each other spaced apart in the vertical direction.

In addition, the third frame has a cross shape at the lower part of the transformer body and is bent upward, and an upper bent end thereof is coupled to the base frame.

In addition, a buffer member is further coupled between the base frame and the transformer body and between the first, third, and fourth frames and the transformer body.

In addition, the second frame coupled in the direction in which the low-voltage cable is located, it characterized in that the support means for supporting the low-voltage cable is further provided so that the coupling portion of the low-voltage cable connected to the transformer body does not flow.

In addition, the support means may include: a first support frame having one side coupled to the second frame and the other end positioned under the low voltage cable; and a second support frame for fixing the low-voltage cable while being coupled to the first support frame while surrounding the low-voltage cable.

In addition, the second support frame may include: a 2-1 support frame coupled to the upper portion of the other side of the first support frame; and a 2-2 support frame coupled to the 2-1 support frame and fixing the low-voltage cable, wherein the low-voltage cable is provided on a coupling surface of the 2-1 support frame and the 2-2 support frame. A groove corresponding to the shape of the outer circumferential surface of the is formed so that when the 2-1 support frame and the 2-2 support frame are coupled, the low-voltage cable is pressed into the groove and fixedly coupled thereto.

The present invention described above has the following effects.

First, by applying the protective frame structure to the periphery of the side and the lower portion of the transformer body, it is possible to effectively prevent the transformer body from being damaged due to physical impact from the outside during installation work.

In addition, when the second frame coupled to the first frame is configured in a detachable manner by fastening the bolts, various types of second frames can be combined and used according to the environment in which the transformer is used.

In addition, when the transformer body and the protective frame are spaced apart and the second frame is configured by a plurality of frames spaced apart from each other, heat dissipation efficiency according to the rise in the transformer temperature can be increased.

In addition, by configuring the third frame in a cross shape and bending each end of the cross shape upward to combine with the second frame, the lower part of the transformer body is protected and the heat caused by the temperature rise of the transformer is removed through the lower empty space. can be emitted as

In addition, by configuring the fourth frame, it is possible to prevent separation of the transformer body and firmly fix it to the protection frame.

In addition, by applying the buffer member, it is possible to prevent damage that may occur when the protection frame is in direct contact with the transformer body.

In addition, the configuration of the support means prevents damage to the transformer body including the terminal coupling portion during handling through the low-voltage cable, and enables more sophisticated handling work.

In addition, since insulating oil is not used, all of the above-mentioned conventional problems can be solved.

Figure 1a is a picture substitute for a drawing showing the state of damage to the enclosure of a general oil-immersed transformer for underground use;
Figure 1b is a picture substitute for a drawing showing a solid insulation transformer for underground used to compensate for the shortcomings of the oil-immersed transformer for underground;
2 is a perspective view of a solid insulation transformer showing a state in which a protection frame according to an embodiment of the present invention is applied;
Figure 3 is a side view of Figure 2;
4 is a perspective view of a solid insulation transformer showing a state in which a protection frame according to another embodiment of the present invention is applied;
Figure 5 is a side view of Figure 4;
6 is a perspective view of a solid insulation transformer showing a state to which a protection frame according to another embodiment of the present invention is applied;
7 is a side view of FIG. 6 ;
8 is a perspective view of a solid insulation transformer showing a state in which a protection frame and a support means according to the present invention are applied;
Fig. 9 is a side view of Fig. 8;
10 is a view showing a configuration state of the support means according to the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

2 is a perspective view of a solid insulation transformer showing a state in which the protection frame 20 according to an embodiment of the present invention is applied, FIG. 3 is a side view of FIG. 2, and FIG. 4 is a protection frame according to another embodiment of the present invention ( 20) is a perspective view of a solid insulation transformer showing the applied state, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a perspective view of a solid insulation transformer showing a state to which the protection frame 20 according to another embodiment of the present invention is applied, 7 is a side view of FIG. 6 ; On the other hand, in the case of the side view, the side view in the opposite direction can also be understood to have the same shape as only the direction is opposite.

2 and 3 show the structure of the second frame 23 according to the first embodiment of the present invention, and Figs. 4 and 5 are views of the second frame 23 according to the second embodiment of the present invention. 6 and 7 show the structure of the second frame 23 according to the third embodiment of the present invention, and other structures of the transformer body 10 and the protective frame 20 Since is the same, in the following description, only the structure of the second frame 23 according to each embodiment will be separately described.

The present invention is a solid insulation transformer comprising a transformer body 10 having four side perimeters and a low-voltage cable 11 connected to an upper one side, wherein the side perimeter of the transformer body 10 and the lower part are subjected to physical impact with the outside. It relates to a solid insulation transformer to which a protection frame 20 for preventing the transformer body 10 from being damaged and a support means 30 structure for preventing the flow of the low voltage cable 11 are applied. Prior to explaining the present invention, since the structure of the solid insulation transformer for underground is a known technology, a detailed description thereof will be omitted because it is judged that there is a risk of obscuring the gist of the present invention.

First, the protection frame 20 includes a base frame 21 , a first frame 22 , a second frame 23 , and a third frame 24 , and may further include a fourth frame 25 . . The protective frame 20 may be made of a metal material or a synthetic resin material, and is preferably made of a flame retardant material in consideration of the temperature rise of the transformer body 10 .

The base frame 21 supports the outer periphery of the lower part of the transformer body 10 . The transformer body 10 may be understood as a solid insulation transformer coupled with an enclosure. The base frame 21 has a predetermined width and is supported on a flat lower peripheral surface of the lower part of the transformer body 10 . At this time, a cushioning member (not shown) made of an elastic material is interposed between the base frame 21 and the lower peripheral contact surface of the transformer body 10 . As the base frame 21 is in direct contact with the transformer body 10 through the configuration of the buffer member, it is possible to prevent the transformer body 10 from being damaged by vibration during installation or operation of the transformer.

The first frame 22 is connected to the base frame 21 , and is located at the four corners of the side of the transformer body 10 , respectively. The first frame 22 may be welded to the base frame 21 or fastened with bolts. A lower portion of one side of the first frame 22 is coupled to the base frame 21 . The other side is formed in the upper straight line direction. The first frame 22 is manufactured in a 'C' shape, and a portion forming a groove is coupled to the base frame 21 in a shape toward the outside of the corner of the transformer body 10 . The first frame 22 is positioned to be spaced apart from the corner of the transformer body 10 by a predetermined interval, and an elastic cushioning member is also interposed between the transformer body 10 and the first frame 22 .

The second frame 23 is coupled to each other of the first frame 22 positioned at the four corners of the transformer body 10 .

The second frame 23 is respectively positioned on the four circumferential surfaces of the transformer body 10 , and both ends are coupled to the first frame 22 , respectively. Although a detachable coupling method such as bolt coupling is illustrated in the drawings, a semi-permanent fixed coupling method such as welding coupling may be used for the fastening method with the first frame 22 . Both sides of the second frame 23 are formed by bending in the outer direction of the transformer body 10 , thereby maintaining a constant separation distance between the second frame 23 and the transformer body 10 . Since the upper and lower portions of the transformer body 10 are radially configured based on the upper center and lower center of the transformer body 10, respectively, the side of the transformer body 10 except for the upper and lower portions of the transformer body 10 formed in a radial shape It is preferable to set the height of the second frame 23 based on the height.

The second frame 23 positioned and coupled to each of the four side surfaces of the transformer body 10 is configured as one (first embodiment) as shown in FIG. 2, or two as shown in FIG. 4 (second embodiment) or FIG. As shown in 6, it can be composed of three (third embodiment). Of course, it is also possible to configure the second frame 23 in four or more, and the number and thickness (height) of the second frame 23 may be set according to the size of the transformer body 10 .

As in the first and second embodiments, when the second frame 23 is configured in a plate shape, it is possible to couple the first frame 22 with bolts, etc., but as in the third embodiment, the second frame 23 ), it is preferable to use a bonding method such as welding when it is configured in a circular rod shape rather than a plate shape. At this time, the heat dissipation efficiency due to the temperature rise of the transformer body 10 is higher in the structure of the second embodiment than in the first embodiment, and the structure of the third embodiment has heat dissipation compared to the structure of the second embodiment Efficiency is high. However, when the number of the second frames 23 is further increased, the distance between the second frames 23 becomes narrower, so the heat dissipation efficiency may rather decrease, and the number of the second frames 23 is set in consideration of this. It is preferable to do

The third frame 24 is positioned under the transformer body 10 and has a cross shape. The cross center of the cross shape is in contact with the center surface of the lower part of the transformer body 10 . At this time, the buffer member is also interposed between the third frame 24 and the contact surface of the lower part of the transformer body 10 . In addition, each of the four cross-shaped ends of the third frame 24 is bent in the upper direction and coupled to the side surface or the lower portion of the periphery of the base frame 21 . Welding or bolting can be applied for the connection type.

In the fourth frame 25, the base frame 21, the first frame 22, the second frame 23, and the third frame 24 are seated and supported inside the transformer body 10 without departing to the outside, It supports the upper part of the transformer body 10 so as to be supported in a fixed position. Although the figure shows that the fourth frame 25 is coupled to each of the first frames 22 to support the upper peripheral edge of the transformer body 10, the fourth frame 25 includes the first frame 22 and the second frame. It may be coupled to at least one of the two frames 23, and the coupling method may also be applied to the above-described fixed coupling method (welding coupling) or detachable coupling method (bolt coupling). At this time, it is preferable to interpose the buffer member also between the contact surface of the fourth frame 25 and the transformer body 10 . That is, it is preferable to interpose the buffer member in all of the protection frames 20 in contact with the transformer body 10 .

8 is a perspective view of a solid insulation transformer showing a state in which the protection frame 20 and the supporting means 30 according to the present invention are applied, FIG. 9 is a side view of FIG. 8, and FIG. 10 is the supporting means 30 according to the present invention. It is a diagram showing the configuration state of

Another embodiment (fourth embodiment) of the second frame 23 according to the present invention and the structure of the supporting means 30 will be described with reference to FIGS. 8 to 9 .

First, referring to FIG. 8 , the fourth embodiment of the second frame 23 shows a structure in which the structures of the first embodiment, the second embodiment, and the third embodiment are mixed and used. The drawing shows a structure using a mixture of the first embodiment and the second embodiment. That is, the structure of the second frame 23 according to the first embodiment is applied to one side of the transformer body 10 to which the low voltage cable 11 is connected, and the second frame according to the second embodiment is applied to the remaining three sides. The structure of the frame 23 was applied.

On the other hand, a low-voltage terminal connection part (not shown) is formed on one upper side of the solid insulation transformer, and the low-voltage cable 11 is connected thereto. In general, when installing a solid insulation transformer, the operator adjusts the position and direction of the transformer body 10 by handling the low voltage cable 11 while holding it. At this time, there is a problem in that the enclosure, that is, the low-voltage terminal connection part is damaged due to the flow of the low-voltage cable 11 .

Therefore, as a structure for preventing the flow of the low-voltage cable 11, the support means 30 is applied to the present invention.

The support means 30 is coupled to the second frame 23 in the direction in which the low voltage cable 11 is located. In the following description, the second frame 23 to which the support means 30 is coupled is referred to as a 'front' of the four sides of the transformer body 10 .

The support means 30 is coupled to the second frame 23 coupled to the front, and includes a first support frame 31 and a second support frame 32 . The coupling of the supporting means 30 and the second frame 23 may also be applied by welding or bolt coupling.

One side of the first support frame 31 located at the bottom is coupled to the second frame 23 , and the other side located at the upper side is located under the low voltage cable 11 . At this time, referring to FIG. 9 , the first support frame 31 is bent outwardly of the transformer body 10 , and the other end of the first support frame 31 positioned under the low voltage cable 11 is It is bent in the same direction as the extension direction of the low voltage cable 11 connected to the low voltage terminal connection part.

The second support frame 32 is coupled while surrounding the low voltage cable 11 from the other side of the first support frame 31 to fix the low voltage cable 11 to the first support frame 31 . That is, while the second support frame 32 is coupled, the low-voltage cable 11 is fixed while being pressed in the coupling direction with the first support frame 31 . It is preferable to apply a detachable coupling method using a bolt and a nut for coupling of the first support frame 31 and the second support frame 32 .

In this case, the second support frame 32 may include a 2-1 support frame 32-1 and a 2-2 support frame 32-2.

The 2-1 support frame 32-1 is coupled to the upper portion of the other side of the first support frame 31, and the low-voltage cable 11 is seated on the 2-1 support frame 32-1. In this state, the 2-2 support frame 32-2 is coupled to the 2-1 support frame 32-1 to closely fix the low-voltage cable 11.

Referring to FIG. 10 together with FIG. 9 , the 2-1 support frame 32-1 and the 2-2 support frame 32-2 have opposite shapes, and the 2-1 support frame 32-1 ) and a groove (not shown) corresponding to the shape of the outer circumferential surface of the low-voltage cable 11 is formed on the coupling surface of the 2-2 support frame 32-2. Accordingly, when the 2-1 support frame 32-1 and the 2-2 support frame 32-2 are coupled, the low-voltage cable 11 is pressed into the groove and fixedly coupled thereto. In this way, by fixing the low-voltage cable 11 to the first support frame 31 through the second support frame 32 , the low-voltage cable 11 is prevented from flowing during the handling operation while the low-voltage cable 11 is gripped. can do.

According to the present invention described above, it is possible to prevent damage to the transformer body 10 due to physical impact when installing the transformer while maintaining the heat dissipation efficiency as in the prior art by applying the protective frame 20, and the supporting means 30 ) to prevent the flow of the low-voltage cable 11, it is possible to prevent damage to the transformer body 10, especially the enclosure, even during handling work using the low-voltage cable 11.

In the above, even if all the components constituting the embodiment of the present invention are described as being combined or operated in combination, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are for explanation rather than limiting the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1: Transformer body 1-1: Low voltage cable
2: frame
10: transformer body 11: low voltage cable
20: protection frame 21: base frame
22: first frame 23: second frame
24: third frame 25: fourth frame
30: support means 31: first support frame
32: second support frame 32-1: second support frame
32-2: 2-2 support frame

Claims (9)

A solid insulation transformer comprising a transformer body having four side perimeters and a low voltage cable connected to at least one side from the top,
A protective frame for preventing the transformer body from being damaged by a physical impact with the outside is provided on the side periphery and the lower portion of the transformer body,
The protection frame,
a base frame supporting the lower periphery of the transformer body;
a first frame connected to the base frame and positioned at the side corners of the transformer body, respectively;
a second frame coupled between each of the first frames, the second frame being spaced apart from the transformer body at a predetermined distance to surround a periphery of the side of the transformer body; and
A solid insulation transformer comprising a; a third frame positioned below the transformer body and coupled to the base frame. delete According to claim 1,
At least one of the first frame and the second frame,
A solid insulation transformer further comprising a fourth frame supporting an upper portion of the transformer body so that the transformer body is supported inside the protection frame. According to claim 1,
The second frame is
A solid-state insulation transformer composed of a plurality of units and coupled to each other while being spaced apart from each other in the vertical direction. According to claim 1,
The third frame is
A solid insulation transformer having a cross shape at a lower portion of the transformer body and being bent upward, and an end bent upwards is coupled to the base frame. 4. The method of claim 3,
A solid insulation transformer in which a buffer member is further coupled between the base frame and the transformer body and between the first, third, and fourth frames and the transformer body. 7. The method of any one of claims 1 and 3 to 6,
In the second frame coupled to the direction in which the low voltage cable is located,
A solid insulation transformer further comprising a support means for supporting the low voltage cable so that the coupling portion of the low voltage cable connected to the transformer body does not flow. 8. The method of claim 7,
The support means,
a first support frame having one side coupled to the second frame and the other side positioned under the low voltage cable; and
A solid insulation transformer comprising a; a second support frame for fixing the low voltage cable while being coupled to the first support frame while surrounding the low voltage cable. 9. The method of claim 8,
The second support frame,
a 2-1 support frame coupled to the upper portion of the other side of the first support frame; and
and a 2-2 support frame for fixing the low-voltage cable while being coupled to the 2-1 support frame.
A groove corresponding to the shape of the outer circumferential surface of the low-voltage cable is formed on the coupling surface of the 2-1 support frame and the 2-2 support frame, and the 2-1 support frame and the 2-2 support frame A solid insulation transformer that is fixedly coupled while the low voltage cable is pressed into the groove during coupling.

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