KR101783370B1 - Earthquake-proof mold transformer - Google Patents

Abstract

An earthquake-proof mold transformer according to the present invention includes: a base frame arranged on the ground; upper and lower frames arranged on the upper and lower sides of the base frame with an interval; at least two or more coils arranged between the upper frame and the lower frame; a core connected to each of the coils; a plurality of upper and lower spacers arranged between the coil and the upper and lower frames; a first buffer member vertically arranged between the coils; and a plurality of second buffer members which are relatively moved with respect to the base frame and are arranged on a base plate. The earthquake-proof mold transformer according to the present invention can prevent the spacer and the coil from being separated by reducing displacement generated in the mold transformer when an earthquake occurs. In addition, the present invention can prevent the earthquake-proof mold transformer from being damaged and broken by buffering an impact using the first and second buffer members.

Description

Earthquake-proof mold transformer

The present invention relates to an anti-vibration mold transformer, and more particularly, to an anti-vibration mold transformer capable of stably coping with vertical and horizontal vibration when an earthquake occurs.

A transformer is a power device that supplies electric power to a line with an appropriate voltage for power. It is a power device that receives voltage from a power plant and transmits power to a customer through a step-up and a depressurization.

Generally, the basic structure of a transformer is that a coil is wound on both sides of an iron core to divide it into a primary winding and a secondary winding, and the iron core is used as a path of magnetic flux. When an AC power source is connected to the primary winding, An alternating magnetic flux is generated. Since this magnetic flux is linked with the secondary winding and alternately changes in accordance with the frequency of the alternating current, a voltage is generated in the secondary winding, and the voltage can be controlled according to the primary and secondary winding coils.

Here, the transformer that is insulated by molding the coil portion of the coil wound around the iron core with epoxy resin is called a dry mold transformer. Since the dry-type transformer uses flame-retardant epoxy instead of insulating oil, there is no fear of fire, Because it is lightweight, it is installed in various fields such as building, apartment, subway, ship and is coated with epoxy resin, so it can prevent corrosion from moisture and dust, and it is installed in water treatment facility.

The dry-type mold transformer includes a coil assembly molded by an epoxy resin with a high-voltage coil and a low-voltage coil separated from each other and having a predetermined space inside, a plurality of stacked silicon steel plates stacked in such a manner as to be exposed upward and downward through the coil assembly, And upper and lower frames for pressing and pressing the silicon steel sheet exposed upward and downward, respectively.

Japanese Patent Application Laid-Open No. 10-1706108 (Patent Document 1) is known as an example of such a dry-type transformer, and Patent Document 1 discloses a coil assembly in which a coil is molded, A pair of upper and lower frames each of which is coupled to the exposed upper and lower portions of the silicon steel plate; and a plurality of upper and lower frames disposed between the coil assembly and the upper and lower frames, Wherein the upper spacer is provided with a constant pressing force between the upper frame and the upper spacer to elastically support the upper frame when the vibration is generated to buffer the upper and lower vibrations of the upper frame, A first elastic member is interposed between the lower spacer and the lower frame, and between the lower spacer and the lower frame, And a vertical buffering device for buffering the vertical load caused by the vibration of the lower spacer by receiving the phaser, wherein a bottom portion of the lower spacer supports the lower frame while being fixed to the ground, Wherein the vertical shock absorber comprises a receiving member for receiving the lower spacer and guiding the lifting and lowering of the lower spacer, And a buffer member which is in contact with the bottom surface of the spacer and buffers the vertically directed load of the lower spacer.

Patent Document 1 discloses a pre-shock absorber for elastically supporting the upward, downward, and horizontal flows of the lower frame. However, the pre-shock absorber can not cope with an earthquake generated in an instant.

Also, Patent Document 1 is configured to prevent the coil assembly from being separated by connecting the coil assembly with a connecting member such as a frame, but this also involves a problem that the coil assembly connected by such a connecting member is broken at the same time when an earthquake occurs.

: Korean Registered Patent No. 10-1706108

An object of the present invention is to provide an anti-vibration mold transformer capable of preventing displacement of a spacer and a coil by reducing a displacement generated in a mold transformer when an earthquake occurs.

Another object of the present invention is to provide an earthquake-resistant mold transformer capable of stably coping with vertical and horizontal vibration generated instantaneously when an earthquake occurs by using the first and second buffer members.

An earthquake-resistant mold transformer according to an embodiment of the present invention includes: a base frame disposed on a ground; At least two coils disposed above the base frame with an interval therebetween; A core that penetrates the coil and is exposed upward and downward to form a magnetic circuit; A lower frame disposed between the base frame and the coil and holding the exposed core by binding; An upper frame disposed at an upper portion of the coil and supporting the exposed core to support the core; A plurality of upper and lower spacers disposed between the coil and the upper and lower frames; A first buffer member having a plurality of buffer units arranged vertically between the coil and the coil and on both side surfaces of the coil to elastically support the horizontal flow of the coil and a plurality of horizontal bars for supporting the buffer units; And a plurality of second cushioning members that are supported at upper ends of the base plate spaced apart from the lower frame and spaced apart from each other and capable of relatively moving in the horizontal direction with respect to the base frame at the time of vibration and elastically supporting the upward and downward flows .

In this case, the plurality of buffer units may include a support plate disposed between the coil and the coil and on both side surfaces of the coil, a moving plate having a smaller size than the support plate and disposed at the center of the support plate, And a horizontal cushioning member provided at the center of the moving plate for elastically supporting a horizontal flow, wherein the plurality of second cushioning members are disposed at intervals on the base plate, And a metal ball rotatably incorporated in a cap member having one side connected to the guide shaft and the other side forming a receiving groove.

The horizontal buffering member of the buffer unit may be composed of a guide rod, an elastic member inserted in the guide rod, and a dustproof member inserted into one side of the guide rod.

The guide rod may be formed on one side of the through hole of the moving plate to prevent the guide plate from coming off, and the other side of the guide rod may be formed with a tab portion to be inserted into the anti-vibration member.

The cap member of the second buffer member may be formed with a protrusion on the outer circumferential surface to prevent the metal ball from being separated.

Further, movement of the second buffer member is restricted by a pair of elastic members disposed at intervals on both sides of the base frame, and the elastic member may be made of a vibration-proof rubber.

The elastic member is supported on the base frame by a support piece formed in a cantilever shape, and the support piece can be fixed by a fastening member.

The vibration-proof mold transformer of the present invention has an advantage of preventing damage and failure of the anti-vibration mold transformer because it can prevent displacement of the spacer and the coil by reducing the displacement generated in the mold transformer when an earthquake occurs.

The vibration-proof mold transformer of the present invention is advantageous in that stable coping can be performed using the first and second buffer members with respect to vertical and horizontal vibration instantly generated when an earthquake occurs.

1 is a schematic perspective view of an anti-vibration mold transformer according to an embodiment of the present invention,
Fig. 2 is a longitudinal sectional view of Fig. 1,
3 is a schematic perspective view of a first buffer member according to a preferred embodiment of the present invention,
4 is a partially cut-away sectional view showing a structure of a horizontal buffer member employed in a first buffer member according to a preferred embodiment of the present invention,
5 is a cross-sectional view schematically showing a state in which a second buffer member according to a preferred embodiment of the present invention is disposed on a base plate,
6 is a partially cut-away sectional view showing a structure of a second buffer member according to a preferred embodiment of the present invention.

Hereinafter, embodiments of an earthquake-resistant mold transformer of the present invention will be described with reference to the accompanying drawings.

1 and 2, an earthquake-resistant mold transformer 100 according to the present invention includes a base frame 10, upper and lower frames 20 and 30, a coil 40, a core 50 The upper and lower spacers 60 and 70, and the first and second buffer members 80 and 90, respectively.

The vibration-proof mold transformer 100 includes three coils 40 arranged in a line in the longitudinal direction of the core 50, for example, between the coils 40 and the coils 40, A first cushioning member 80 composed of, for example, four cushioning units 80a to 80d is disposed in the longitudinal direction (see Fig. 3).

For example, the coil 40 may have a shape in which a winding portion is molded by an epoxy resin. On the front surface and the upper surface, primary and secondary terminals to which a primary voltage and a secondary voltage for the coil are applied, An inter-phase lead for connecting the primary side terminal, a tap switching terminal, and the like.

The base frame 10 is disposed at a portion where a plurality of coils 40 are installed on the ground G and is arranged in a rectangular shape or a parallel straight line shape. Further, the base frame 10 is fixed to the paper surface G by fastening means not shown.

The lower frame 30 is first disposed on the upper portion of the base frame 10 and the lower frame 30 and the upper frame 20 are disposed on the lower and upper portions of the plurality of coils 40, 40 by press-fitting and supporting the exposed portions of the core 50 made of a plurality of silicon steel sheets inserted therebetween by using a plurality of fastening means 21, 22 at the lower portion and the upper portion. The lower frame 30 and the upper frame 20 are paired so as to press the core 50 made of silicon steel on both sides.

A plurality of connecting plates 24 penetrate through the plurality of coils 40 so that the upper frame 20 and the lower frame 30 are integrated with the coil assembly so that the upper frame 20 and the lower frame 30 30, respectively.

At least two coils 40 are disposed between the upper frame 20 and the lower frame 30, and three coils 40 are arranged in this example. The three coils 40 are arranged in a line in the longitudinal direction of the core 50.

In this case, the core 50 may include, for example, two yokes each having a long length so as to constitute a magnetic circuit for a three-phase transformer, and a yoke (yoke) Three legs may be included. The three coils 40 are assembled by being joined to the outer periphery of three legs. The upper frame 20 and the lower frame 30 are connected to the exposed portions of the upper and lower yokes made of a plurality of silicon steel sheets Fixedly supported.

The upper and lower spacers 60 and 70 are interposed between the plurality of coils 40 and the lower frame 30 or interposed between the plurality of coils 40 and the upper frame 20, The noise and vibration of the structure are blocked while maintaining the insulation distance of the upper and lower frames 40 and 40, and the positions of the lower and upper frames 20 and 30 are fixed.

3 and 4, the first cushioning member 80 includes a plurality of cushion members 40, for example, four cushion members 40 disposed vertically on both sides of the coil 40, between the coil 40 and the coil 40, Four buffer units 80a-80d and a plurality of, e.g., four, horizontal bars 72 for supporting the plurality of buffer units 80a-80d.

Each of the plurality of buffer units 80a to 80d includes a support plate 82 disposed between the front and rear surfaces of the coil 40 and having a rectangular shape, Four wire ropes 83 connecting between the four corners of the support plate 82 and the moving plate 84 and a plurality of wire ropes 83 extending in the horizontal direction of the moving plate 84, And includes a buffer member 86. In this case, it is preferable that the support plate 82 is formed larger than the outer diameter of the coil 40.

As shown in FIG. 3, the plurality of support plates 82 are spaced apart from each other by the coils 40. In the case of supporting three coils 40, four support plates 82 are used. The plurality of support plates 82 are supported by the plurality of horizontal bars 72 at the edge portions of the plurality of support plates 82. In this case, it is preferable that the plurality of horizontal bars 72 are fixed to the upper and lower frames 20 and 30 by separate fastening members (not shown). Here, the support plate 82 supported by the plurality of horizontal bars 72 may be installed by a bushing (not shown) so that the support plate 82 can be moved by a predetermined amount.

The moving plate 84 is formed to have a smaller size than the supporting plate 82 and a through hole 85 is formed at the center and a small through hole is formed between the corner of the moving plate 84 and the edge of the supporting plate 82 And four wire ropes 83 are inserted into (through) the through holes to connect to the support plate 82 in an X-shape. It is preferable that the wire rope 83 is a commonly used metal wire rope.

4, the horizontal buffer member 86 provided in the buffer units 80a to 80d includes a guide rod 182, an elastic member 184 inserted in the guide rod 182, And an anti-vibration member 186 attached to one side of the guide rod 182.

The protruding portion 172 is formed on one side of the guide rod 182 to prevent it from being separated from the through hole 85 formed in the center of the moving plate 84 and the tab portion 174 is formed on the other side of the guide rod 182, . The guide rod 182 may be configured in the form of a dumbbell cut at the center, but may be formed in various polygonal shapes depending on the user.

The anti-vibration member 186 is made of a predetermined silicone rubber or a rubber having a vibration frequency.

As shown in FIGS. 5 and 6, the second buffer member 90 is relatively moved with respect to the base frame 10, and a plurality of second buffer members 90 are disposed at intervals on the base plate 92. The base plate 92 is disposed on the upper portion of the base frame 10 and a plurality of vibration proof rubber pieces 194 are disposed between the base plate 92 and the base frame 10 And to reduce excitation vibrations generated during normal operation of the transformer.

The plurality of second buffer members 90 are disposed on the base plate 92 at intervals. Each of the second cushioning members 90 includes a guide shaft 94 having an upper end supported by the base plate 92, an elastic member 95 fitted to the guide shaft 94, And a metal ball 96 rotatably incorporated in a cap member 98 forming a receiving groove on the other side. The cap member 98 of the second cushioning member 90 is formed with a protrusion 97 on the outer circumference thereof to prevent the metal ball 96 from coming off.

The guide shaft 94 is formed in the form of a vertical bar, and the elastic member 95 is fitted on the outer periphery. The elastic member 95 applies a spring having elasticity. The cap member 98 is formed in a hemispherical shape and protrusions 97 are formed on the outer circumference of the cap member 98 to prevent the metal ball 96 from being separated when the metal ball 96 is inserted.

When the protrusion 97 is not formed on the cap member 98, the cap member 98 may be formed to be large and the metal ball 96 may be tightly coupled.

As shown in FIGS. 2 and 5, the second cushioning member 90 is restricted in movement by a pair of elastic members 130 spaced on both sides of the base frame 10, (130) is made of a vibration proof rubber.

The elastic member 130 is supported by a support piece 132 formed in a cantilever shape and the support piece 132 is fixed by a fastening member 134. The support piece 132 is a plate member bent in an "L" shape and formed of a metal plate. One side of the elastic member 130 is fixed or fitted to the lower frame 30 and the other side is fixed or fitted to the base frame 10 to be fastened. The fastening member 134 is composed of a bolt and a nut which are generally used.

Hereinafter, an operation of the vibration-proof mold transformer of the present invention will be described.

As shown in FIGS. 1 and 2, the vibration damping transformer 100 of the present invention supports the coil 40 in a state in which there is no horizontal movement when the vibration is not generated, 2 buffer member 90 supports the coil 40 in a state where the buffer member 90 is disposed on the base plate 92 (that is, the state in which the metal ball 96 of the second buffer member 90 does not move).

The operation of the first cushioning member 80 and the second cushioning member 90 of the vibration-proof mold transformer 100 according to the present invention when an earthquake occurs will be described below.

The first cushioning member 80 is provided with a cushioning unit 80a (hereinafter, referred to as " cushioning member 80a " -80d wire rope 83 and a moving plate 84 disposed at the center of the support plate 82 support the coil 40 to prevent the coil 40 from coming off and also to prevent damage to the coil 40 .

When an earthquake occurs, the horizontal buffer member 86 inserted in the moving plate 84 disposed at the center of the support plate 82 of the shock absorber units 80a-80d is moved in a predetermined one direction (Tilted) anti-vibration mold transformer 100 to the opposite side. 4, the vibration damping member 186 is disposed on the guide rod 182 with the elastic member 184 interposed therebetween, so that the vibration damping member 186 is inserted into the vibration damping mold transformer 100, Can be buffered and supported corresponding to the direction of occurrence of the earthquake.

Particularly, since the shock absorber units 80a-80d of the first shock absorber 80 are disposed between the coils 40 and on both sides of the coil, the shock absorbers 80a-80d can cope with vibrations in any direction 80a-80d are in a state of supporting both sides of each coil 40). Also, the earthquake-resistant mold transformer 100 is secondarily cushioned by the support plate 82 of the buffer units 80a-80d or the wire rope 83. That is, the supporting plate 82 of the buffer units 80a to 80d or the wire rope 83 cushionly supports one side of the anti-vibration mold transformer 100 that is inclined (tilted) in a predetermined one direction (horizontal direction).

Therefore, since the first buffer member 80 buffers the anti-vibration mold transformer 100 for the first and second order with respect to the horizontal flow, the vibration (bearing force) against the predetermined horizontal flow It is possible to sufficiently cope with and to prevent the breakaway of the anti-vibration mold transformer 100.

On the other hand, as shown in FIGS. 5 and 6, a plurality of second buffer members 90 are provided on the base plate 92 at intervals.

When each of the second cushioning members 90 generates an earthquake (in the direction of a horizontal arrow in FIG. 5, or in a direction opposite to a horizontal arrow and moves in a vertical direction or a downward direction), the metal ball 96 moves in a predetermined direction While the vibration-proof mold transformer 100 is buffered and supported to prevent the load from being biased. In addition, the elastic member 95 elastically supports the vertical flow to buffer the vertical vibration.

When an earthquake occurs, the second cushioning member 90 primarily moves the plurality of metal balls 96 of the second cushioning member 90 in accordance with the vibration (supporting force) generated in a predetermined direction. Here, the plurality of metal balls 96 are not fixed to the base frame 10 but are freely moved inside the metal balls 96 while being restricted by the elastic members 130 and the support pieces 132.

However, when the magnitude of the earthquake is high, the second cushioning member 90 is configured such that the metal ball 96 sandwiched between the cap member 98 and the guide shaft 94 via the elastic member 95 is horizontally and vertically Absorbing vibration (seismic force) and preventing it from being transmitted to the anti-seismic mold transformer 100. That is, the shaking of the earthquake is appropriately shared by the second buffer member 90, the elastic member 130, and the vibration-proof rubber 194 to be transmitted to the anti-seismic mold transformer 100, thereby buffering the shock by elastic support. When the metal ball 96 receives vibration (seismic force) in the vertical direction, the cap member 98 contacts the elastic member 95 to move upward and downward to alleviate vibration (seismic force) or impact do.

Therefore, the second buffer member 90 can prevent various troubles such as damage and breakdown of the anti-vibration mold transformer 100.

As described above, in the vibration-proof mold transformer according to the present invention, when the earthquake occurs, the vibration of the ground is elastically supported by using the first and second cushioning members to cushion the impact and suppress the transmission to the seismic- Thereby preventing damage or grounding accidents. Further, even when the anti-vibration mold transformer is in operation, the second buffering member can be used to prevent the excitation vibration generated in the anti-vibration mold transformer.

The earthquake-resistant mold transformer of the present invention can be widely applied to various types of high-voltage transformers for electric power.

10: base frame 20: upper frame
30: lower frame 40: coil
50: core 60: upper spacer
70: Lower spacer 80: First buffer member
80a-80d: buffering unit 90: second buffering member
92: base plate 100: anti-vibration mold transformer
130: elastic member 132:

Claims (6)

A base frame disposed on the ground;
At least two coils disposed above the base frame with an interval therebetween;
A core that penetrates the coil and is exposed upward and downward to form a magnetic circuit;
A lower frame disposed between the base frame and the coil and holding the exposed core by binding;
An upper frame disposed at an upper portion of the coil and supporting the exposed core to support the core;
A plurality of upper and lower spacers disposed between the coil and the upper and lower frames;
A first buffer member having a plurality of buffer units arranged vertically between the coil and the coil and on both side surfaces of the coil to elastically support the horizontal flow of the coil and a plurality of horizontal bars for supporting the buffer units;
And a plurality of second cushioning members that are supported at upper ends of the base plate spaced apart from the lower frame and spaced apart from each other and capable of relatively moving in the horizontal direction with respect to the base frame at the time of vibration generation and elastically supporting the upward and downward flows In addition,
The plurality of buffer units may include a support plate disposed between the coil and the coil and on both side surfaces of the coil, a moving plate having a smaller size than the support plate and disposed at the center of the support plate, And a horizontal buffer member provided at the center of the moving plate and elastically supporting the horizontal flow,
Wherein the plurality of second cushioning members each comprise a guide shaft disposed at an interval on the base plate, an elastic member fitted to the guide shaft, and a rotation member rotatably supported on the cap member, one side of which is connected to the guide shaft, Wherein the metal ball comprises a metal ball possibly embedded therein.
The method according to claim 1,
Wherein the horizontal buffering member of the shock absorber comprises a guide rod, an elastic member inserted in the guide rod, and a vibration-proofing member inserted into one side of the guide rod.
3. The method of claim 2,
Wherein the protruding portion is formed at one side of the guide rod so as to be inserted into the through hole of the moving plate, and the other side of the guide rod is formed with a tab portion to be fitted into the vibration-proofing member.
The method according to claim 1,
Wherein the cap member of the second buffer member is formed with a protrusion on the outer periphery to prevent the metal ball from being separated.
The method according to claim 1,
Wherein the second cushioning member is restricted in movement by a pair of elastic members disposed on both sides of the base frame with an interval therebetween, and the elastic member is made of a vibration proof rubber.
6. The method of claim 5,
Wherein the elastic member is supported on the base frame by a cantilevered support piece, and the support piece is fixed by a fastening member.

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