KR101632256B1

KR101632256B1 - Seismic Switchgear

Info

Publication number: KR101632256B1
Application number: KR1020160011463A
Authority: KR
Inventors: 윤광진
Original assignee: 주식회사 이테크
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2016-06-22

Abstract

The present invention relates to a vibration-damping transmission and reception system equipped with vibration damping means for reducing vibration while preventing resonance, and more particularly to a vibration damping transmission system having a transmission and reception system, a frame disposed between a base of a transmission / A coil spring disposed vertically between the upper frame and the lower frame; a coil spring disposed on a slope of the coil spring, the slope of the coil spring being provided so as to intersect in diagonal directions of the respective surfaces, And a lower plate coupled to a lower end of the crossover wire rope and a lower end of the coil spring, so that the influence of the S wave only Not the vibration direction but the transmission of the earthquake The present invention provides an earthquake-resistant power transmission and distribution system capable of attenuating both the influence of the P wave in the horizontal direction as well as the effect of the resonance that can be caused by the vibration damping means.

Description

Seismic Switchgear

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an anti-earthquake resistance switchboard, and more particularly to an anti-vibration switchboard provided with vibration damping means for reducing vibration while preventing resonance.

The switchboard is a device that supplies high-voltage power transmitted from a power plant and downs it to low pressure and distributes power to various facilities.

Therefore, various devices including transformer, converter, breaker, various protection relays, various instruments and leakage detector are built in the inside of the switchgear, and there are many current contacts in each device, so they are vulnerable to external vibration.

In addition to various buildings including residential buildings such as apartments, the switchboards are essential devices in various industrial facilities. If the power supply is stopped due to abnormalities of the switchboard, it may cause considerable damage and inconvenience.

Therefore, a means is needed to protect the switchgear from external vibrations.

As a vibration source affecting the switchboard, a typical example is an earthquake. In addition to an earthquake, there may be various vibrations generated in equipment installed in a switchboard, and there is vibration generated in other installation environments of a switchboard.

An earthquake is a P wave whose direction of vibration and direction coincides with each other, an S wave whose direction of vibration is perpendicular to the direction of the vibration, and a surface wave of which vibration of horizontal and vertical directions is mixed.

At this time, the P wave induces the horizontal direction vibration in the switchboard, and the S wave causes the vertical direction vibration, and the surface wave causes the vibration in the form of mixing the vertical direction and the horizontal direction. Therefore, in order to prepare for the vibration of the earthquake, a means for attenuating or absorbing both vertical and horizontal vibrations is required.

In addition, in addition to earthquakes, various vibrations can affect the switchboard. In particular, vibrations caused by transportation means or surrounding facilities are vibrations that last for a long time, which may lead to a minute displacement of equipment due to vibration accumulation.

As to the prior art for attenuating or blocking vibration of an earthquake, most of the techniques are for attenuating vertical vibration, and it is hard to find a technique for actively attenuating or absorbing the vibration in the horizontal direction.

In addition, the development of a technique that can completely prevent the influence of resonance, which may cause more damage due to the buffering means provided for vibration damping of the earthquake, is presently limited.

Patent Registration No. 10-1081571 (registered on November 02, 2011)

Accordingly, the present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a method and apparatus for estimating the influence of a S wave which is perpendicular to a transmission direction of an earthquake, It is an object of the present invention to provide a seismic switchgear which can attenuate all but also reduce the influence of resonance which can be caused by vibration damping means.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided an earthquake-resistant switchboard comprising: a main body including a main body and a lower portion of a power- A coil spring disposed vertically between the support and the lower support, and a vibration damping portion disposed on the slope surface around the coil spring, the vibration damping portion being formed by intersecting wires which are provided so as to intersect diagonally of the respective surfaces in a diagonal direction, .

Here, the vibration damping portion preferably further includes a center wire rope installed in a vertical direction inside the coil spring.

The vibration damping unit may further include an elastic insert assembly in which a plurality of elastic inserts formed of a cylindrical elastic body are arranged in parallel to the inside of the coil spring in a vertical direction and a part or all of the coil spring is inserted into the outer peripheral surface of the elastic insert do.

In this case, preferably, the vibration damping portion further comprises a ring-shaped retainer provided at the upper or lower portion of the elastic insert to fix the position of the elastic insert.

Alternatively, the vibration damping part may further include a plurality of elastic material particles filled in the coil spring instead of the elastic insert.

The particles of the elastic material are preferably spherical.

Further, the elastic particles are preferably made of a permanent magnet resilient ball formed of a magnetic material, so that the coil spring can induce reflux to the coil spring as the coil spring is vibrated.

The upper frame is composed of an upper vertical plate formed integrally with the upper horizontal plate and the upper horizontal plate, and the lower frame is integrally formed with the lower horizontal plate and the lower horizontal plate, The earthquake-resistant switchboard according to the present invention is preferably installed between the upper vertical plate and the lower vertical plate at a position where the upper vertical plate and the lower vertical plate are opposed to each other, And the like.

Or the air buffer section further includes an air control valve through which air enters and exits.

Alternatively, the upper frame may include an upper vertical plate and an upper vertical plate formed integrally with the upper horizontal plate and bent downward. In this case, the upper frame is integrally bent upward from the flat plate coupled with the lower support by bolts. A bracket made of a wall plate and a horizontal attenuation portion coupled to the wall plate and made of an earthquake-proof mount for attenuating horizontal vibration applied between the upper vertical plate and the wall plate.

The earthquake-resistant switchboard according to the present invention comprises at least one displacement sensor installed on the upper surface of the foundation concrete or an appropriate position of the switchgear along the lower frame bottom edge portion of the lower frame, A control power source for supplying power to the control panel and the displacement sensor, and a power monitoring control panel connected to the control panel through a communication line to receive displacement information of the power and control panel.

According to the earthquake-resistant switchboard of the present invention, not only the influence of the S wave perpendicular to the transmission direction of the earthquake in the seismic wave but also the attenuation of the influence of the P wave in the horizontal direction, such as the transmission direction of the earthquake, The influence of the resonance which can be caused by the means can be reduced.

1 is a front sectional view of a vibration damping unit in an earthquake-resistant switchboard according to the present invention,
FIG. 2 is a front sectional view showing an arrangement of elastic inserts in a seismic retrograde switchboard according to the present invention,
3 is a partial perspective view of a center wire rope in an earthquake-resistant switchboard according to the invention,
4A to 4C are a perspective view, a front view and an operation state view of a cross wire rope in an earthquake-resistant switchboard according to the present invention,
Figure 5a is a perspective view of an elastic insert in a seismic switchgear according to the present invention,
Fig. 5B is a layout showing the position where the elastic insert of Fig. 5A is applied to the distribution board, Fig.
FIG. 6 is a front sectional view of a vibration damping unit in which the cushioning particles are provided in the vibration-
7A and 7B are conceptual diagrams showing the electromagnetic and mechanical action of the buffer particles in the seismic retrograde switchboard according to the present invention,
FIGS. 8A and 8B are views for explaining installation of an air cushion in a seismic retrofit switchboard according to the present invention,
9A and 9B are installation concept diagrams of an earthquake-proof mount in an earthquake-resistant switchboard according to the present invention,
10 is a conceptual diagram showing the arrangement of a vibration damping portion and an air buffer or an earthquake-proof mount in an earthquake-resistant switchboard according to the present invention;
11 is a conceptual diagram showing a displacement monitoring unit in an earthquake-resistant power transmission /

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
The present invention can be represented by two embodiments. Hereinafter, each embodiment will be described in order.

&Lt; Example 1 >

As shown in FIG. 1, the earthquake-resistant power transmission / distribution system according to the present invention includes a main frame 10 installed between a concrete foundation 7 and a switchboard 3 on which a switchboard 3 is placed, And a vibration damping portion 20 provided inside the housing 10.

(3) refers to a switchboard (3) used in commercial buildings, residential buildings, and other facilities requiring not only various industrial facilities but also all facilities requiring a switchboard, and all switchboards, regardless of the specific shape or use of the switchboard (3) .

The base frame 10 is composed of an upper frame 11 attached to the bottom surface of the switchboard 3 and a lower frame 12 attached to the upper surface of the concrete foundation 7. 1, the upper frame 11 preferably includes an upper horizontal board 111 and an upper vertical board 112 formed integrally with the upper horizontal board 111 and vertically bent downward. have.

1, the lower frame 12 may be composed of the lower horizontal board 121 alone or may be integrally formed with the lower horizontal board 121 and the upper horizontal board 121 And the lower vertical plate 122 is formed.

The vibration of the lower frame 12 due to the earthquake is minimized in the vibration damping portion 20 to be described later so that the upper frame 11 and the lower frame 12 are separated from each other, 11 to the switchgear 3 coupled to the upper surface of the switchgear 3 can be prevented. As shown in FIG. 1, the upper frame 11 may be coupled with bolts and nuts at the bottom of the power distribution panel, and the lower frame 12 may be attached to the upper surface of the concrete base with anchor bolts or similar fixing means.

Preferably, the neoprene vibration pad 25 may be provided between the upper frame 11 and the lower surface of the switchboard 3, or between the lower frame 12 and the upper surface of the concrete foundation. The neoprene vibration pad 25 performs not only a vibration damping operation with the vibration damping portion 20 to be described later but also a function of suppressing the resonance which may be caused by the vibration damping portion 20 to some extent .

The shapes of the upper frame 11 and the lower frame 12 may be specifically formed into a rectangular enclosure shape when they are coupled together or may be formed in the shape of a rectangular frame having a vibration damping portion 20 and air It may be in an empty form other than the portion where the buffering portion 31 and the horizontal buffering portion 32 are installed. The upper frame 11 and the lower frame 12 may be made of structural rolled steel, but not of other materials having similar strength characteristics.

The vibration damping section 20 includes a coil spring 21, an intersecting wire rope 22 around the coil spring 21, and a coil spring 21 and an intersecting wire rope 22, A lower plate 27 to which a lower end of the coil spring 21 and the cross wire rope 22 are coupled and an elastic insert assembly 24a provided inside the coil spring 21 And is disposed between the upper frame 11 and the lower frame 12 to prevent the vibration of the concrete foundation and the lower frame 12 due to the earthquake from being transmitted to the upper frame 11 and the switchboard.
At this time, the elastic insert 241 is a member made of an elastic material and formed into a cylindrical shape. The elastic insert 24a has a plurality of elastic inserts 241 arranged in layers with a predetermined distance from the upper side to the lower side of the coil spring 21. The elastic insert 241 is wound on the outer peripheral surface of the elastic insert 241, A part or all of the elastic insert 21 and the coil spring 21 are inserted so that the resonance frequencies of the parts where the elastic insert 241 and the coil spring 21 are coupled with each other are different from each other, .

The coil spring 21 constituting the vibration damping portion 20 normally supports the load of the switchboard 3 and acts to attenuate the vibration caused by the earthquake primarily when the earthquake occurs. In this case, the coil spring 21 attenuates the vertical vibration of the secondary wave, which is perpendicular to the vibration direction generated by the earthquake and the transmission direction of the vibration. Since the coil spring 21 is made of elastic material and can be elastically deformed in the horizontal direction, the vibration direction generated by the earthquake and the transmission direction of vibration at the time of earthquake are equivalent to the horizontal vibration of the P wave Can be partially reduced.

The cross wire rope 23 is disposed on a slope around the coil spring 21 as shown in Figs. 1 and 4A, and two crossing wire ropes 23 are arranged so as to cross each slope in the diagonal direction of each slope. Each of the cross wire ropes 23 may be formed by twisting a center core and a plurality of strands surrounding the center core (not shown). In this case, each of the center core and the plurality of strands is again formed by twisting a plurality of steel wires.

Therefore, the cross wire rope 23 has a tensile strength equal to or higher than that of the wire of the same thickness, and has a high flexibility, so that it can perform an elastic behavior.

With these properties, the following four effects are exerted from the intersecting wire rope 23 by being disposed in the diagonal direction of the slope around the coil spring 21.

First, the crossover wire rope 23, together with the coil spring 21, acts to bear the load of the switchboard, thereby relieving the load applied to the coil spring 21.

Second, since the cross wire rope 23 has flexibility, it acts elastically to attenuate the primary vibration generated by the earthquake together with the coil spring 21, Prevents damage due to fatigue accumulation.

Third, by having a natural frequency different from that of the coil spring 21, it is possible to prevent resonance, which may be caused by the coil spring 21, when vibration due to an earthquake is generated.

Fourth, when vibration due to an earthquake is generated by being disposed in a diagonal direction for each slope surrounding the coil, as shown in FIG. 4C, it is possible to approach the upper plate or the lower plate from the upper or lower adjacent portion of the cross wire rope 23 toward the center, So that there is no additional space occupation due to deformation. That is, even if the cross wire rope 23 is deformed due to vibration, it is deformed only in a planar state without being bent toward the outside or the inside of the vibration attenuating portion 20, so that even when the entire vibration damping portion 20 vibrates, And even if the cross wire rope 23 is closely arranged to the coil spring 21, interference with the coil spring 21 is prevented.

1 to 3, a center wire rope 22 may be installed in the inner center of the coil spring 21 in a vertical direction which is the same as the longitudinal direction of the coil. The center wire rope 22 may be formed of the same material and structure as the individual strands of the cross wire rope 23. Here, the center wire rope 22 brakes the sudden compression operation of the coil spring 21 when the vibration due to the earthquake is generated, and elastically deforms due to its own elasticity. Therefore, the sudden compression of the coil spring 21 It is possible to prevent an abrupt inclination of the switchgear 3 which may be caused by the coil spring 21 and to prevent the occurrence of resonance due to the coil spring 21 additionally.

Inside the coil spring 21, an elastic insert assembly 24a including a plurality of elastic inserts 241 separate from the center wire rope 22 can be filled therein. The elastic insert assembly 24a may be disposed as in FIGS. 1 and 2, and the specific shape of the elastic insert 241 is as shown in FIG.

The elastic insert 241 is a cylindrical columnar member made of an elastic material. The elastic insert 241 may be formed to have the same length as that of the coil spring 21 but is preferably formed to be shorter than the coil spring 21 so that the elastic insert assembly 24a comprising a plurality of elastic inserts 241 And may be installed in such a manner as to be inserted in parallel to the longitudinal direction of the coil spring 21 as shown in FIG.

The elastic insert 241 may be provided with a hollow through which the center wire rope 22 can be inserted in the center. 5A may be formed on the outer circumferential surface of the elastic insert 241. The groove may be formed to correspond to the inner circumferential surface shape of the coil spring 21, A part of the inner circumferential surface of the spring 21 may be inserted into the outer circumferential surface of the elastic insert 241. Or a coil spring 21 may be embedded in the outer surface of the elastic insert 241, that is, the entire thickness of the coil spring 21 is inserted into the elastic insert 241, although not shown.

5B, the elastic insert 241 can be applied not only to the switchboard but also to the distribution board 8. In this case, the switchboard 3 according to the present invention can also include a distribution board 8, and the distribution board 8 is embedded in the wall, and the elastic insert 241 has an inner wall surface as shown in FIG. Can be installed between the distribution boards (8).

The elastic insert 241 is engaged with the outer circumferential surface of the elastic insert 241 so as to engage with the inner circumferential surface of the coil spring 21 so as to reduce the elastic fatigue of the coil spring 21 when vibration is generated by the earthquake The coil spring 21 acts to prevent the resonance from being formed according to a specific oscillation period so as to prevent secondary damage due to the resonance of the coil spring 21. [

Particularly, the elastic insert 241 is preferably made shorter than the coil spring 21, and a plurality of the elastic inserts 241 and the coil spring 21 are arranged in parallel to each other in the vertical direction of the coil spring 21, The resonance frequency between the coupled portion and the non-coupled portion is different from each other, thereby preventing a constant resonance frequency from being formed.

Therefore, the generation of resonance by the coil spring 21 is suppressed to triple due to the cross wire rope 23, the center wire rope 22 and the elastic insert assembly 24a, so that the risk of resonance is thoroughly prevented, The intersection wire rope 23 together with the coil spring 21 is not only subjected to a P wave which is a vibration in a vertical direction but also to an S wave in a horizontal direction The vibration is also attenuated so that the vibration attenuation can be made in all directions.

In this case, a ring-shaped retainer 242 for maintaining the position of the elastic insert 241 may be installed as shown in FIG. 2 in order to prevent the position of the elastic insert assembly 24a from fluctuating due to vibration .

&Lt; Embodiment 2 >
The second embodiment is the same as the first embodiment except for the elastic insert assembly 24a except that the elastic insert assembly 24a is provided inside the coil spring 21 in the first embodiment, 7B are provided inside the coil spring 21. The cushioning particles are made of a plurality of elastic materials as shown in Figs.

delete

The cushioning particles are not a single mass but a plurality of mutually independent particles, so that the collision between the cushioning particles and the mutual approach and repulsion can cause a greater vibration damping effect as compared with the case where the entire cushioning particles are formed into a single mass .

In this case, the buffer particles are preferably formed into a spherical shape. The principle of vibration damping with a larger width is shown in Fig. 7B when the buffer particles are spherical, as compared with the case where the buffer particles are not spherical or other. That is, when the buffering particles are spherical, the spherical surfaces constituting the outer circumferential surface of the buffering particles come into contact with each other regardless of the angle at which the buffering particles meet with each other, so that the difference between the area when the buffering particles are first contacted with each other and the area where the buffering particles come into close contact with each other is greatest, Since the distance between the particles and the repulsion distance increases, the overall vibration damping width is significantly larger than that in the case where the buffer particles have different shapes.

More preferably, the cushioning particle may be a permanent magnet resilient ball 24b having magnetism. In this case, the permanent magnet resilient ball 24b acts as a permanent magnet to generate magnetic flux. When the coil spring 21 vibrates due to the vibration due to the earthquake, the displacement of the coil spring 21 varies with time and the direction of the displacement also changes continuously. Therefore, the magnetic flux linked to the coil spring 21 A reflux flow that flows along the coil spring 21 is generated. The reflux flows in a direction to generate a force in a direction to block the relative movement occurring between the coil spring 21 and the permanent magnet resilient ball 24b and generates heat due to the self resistance of the coil spring 21. [ Therefore, the kinetic energy expressed by the vibration due to the earthquake is converted into electric energy, and then converted into heat energy again to escape to the surroundings. In addition, due to the reflux generated in the coil spring 21, The vibration damping effect is mechanically expressed.

At this time, the working principle of the vibration damping acting between the coil spring 21 and the permanent magnet resilient ball 24b made of a magnetic material is in accordance with Faraday's law. Faraday's electromagnetic induction law is that in the present invention, as the potential difference is induced in the coil spring 21 when the number of magnetic field lines passing through the coil spring 21 is changed, as shown in the equivalent circuit shown on the right side of FIG. The current flows through the coil spring 21 constituting the coil spring 21. In this case, the rate of change of the number of magnetic field lines passing through the coil spring 21 determines the voltage applied to the coil spring 21.

Here, the voltage V induced in the coil spring 21 can be expressed by the following equation.

(One)

Here,? Represents a quantitative expression of a magnetic flux passing through the inside of the coil spring 21, and is represented by? = BAcos?. is the angle between the horizontal cross-sectional area of the coil spring 21 and the magnetic field, and A is the horizontal cross-sectional area of the coil spring 21.

Therefore, the voltage Vcoil in Equation (1) becomes equal to the rate of change of the magnetic flux passing through the coil spring 21.

Therefore, the greater the vibration caused by the earthquake, the greater the acceleration is generated in the elastic motion, which is the relative movement between the coil spring 21 and the permanent magnet resilient ball 24b, and the intensity of the current induced in the coil spring 21 becomes larger Not only the vibration is converted into heat energy but also the force is applied in the direction in which the vibration is suppressed so that both the vibration due to the earthquake and the resonance of the coil spring 21 can be suppressed.

Meanwhile, as an additional means for suppressing vibration due to the influence of the P wave occurring in the horizontal direction when an earthquake occurs, an air buffer unit 31 as shown in FIGS. 8A and 8B may be further installed. The air buffering part 31 is a chamber made of a stretchable material filled with air. The upper vertical frame 112 is formed on the upper frame 11 and the lower vertical frame 112 is formed on the lower frame 12, The vibration of the foundation concrete 7, which is disposed between the upper vertical plate 112 and the lower vertical plate 122 and fixed integrally with the lower vertical plate 122, To the upper vertical plate 112, which is fixed to the upper vertical plate 112.

As shown in FIGS. 8A and 8B, the air buffer 31 may be provided with an air control valve 313 through which air injection and discharge can be controlled. At this time, a natural resonance frequency corresponding to the elastic force and the air volume of the air buffer 31 may be formed according to the amount of air in the air buffer 31, The amount of air in the air buffer 31 can be adjusted through the air control valve 313. [

In addition, as shown in FIG. 8A, an air chamber 317 may be provided in the air buffer 31. At this time, the air pressure in the air chamber 317 is adjusted to change the natural frequency of the air buffer 31, thereby preventing a situation in which resonance occurs between the seismic wave and the power / distribution board.

At this time, although not shown, a pressure sensor may be installed inside the air cushion 31 for accurate air amount control of the air conditioner.

On the other hand, instead of the air buffer 31, a horizontal buffer 32 may be installed as shown in FIGS. 9A and 9B for reducing the vibration of the P wave applied in the horizontal direction. The horizontal shock absorber 32 is composed of an earthquake-proof mount 321 for absorbing vibration by elastically expanding and expanding movement of the cylindrical cylinder filled with elastic material, and a bracket 325 for fixing the earthquake-proof mount 321. At this time, the resilient material inside the earthquake-proof mount 321 may be a normal coil spring, or the other piston may be air or an elastic member capable of elastic behavior.

At this time, as shown in FIG. 9A, the earthquake-proof mount 321 is arranged such that the expansion and contraction direction is horizontal. In this case, as described above, the upper vertical plate 112 and the lower vertical plate 122 are formed on the upper frame 11 and the lower frame 12, and the upper vertical plate 112 and the lower vertical plate 122 are disposed between the upper vertical plate 112 and the lower vertical plate 122 A bracket 325 for fixing the earthquake-proof mount 321 in the horizontal direction may be provided as shown in FIG. 9A when the earthquake-proof mount 321 is provided or the lower vertical plate 122 is not provided.

The vibration damping portion 20 and the air buffer 31 or the horizontal buffer 32 may be arranged as shown in FIGS. 8A to 10. Preferably, as shown in FIGS. 8A to 10, the vibration attenuator 20 attenuates the vibrations not only in the vertical direction but also in the horizontal direction, so that it is installed at four corners where the balance of the switchboard 3 can be most effectively maintained, The buffering portion 31 or the horizontal buffering device 32 may be installed along the four sides of the base frame 10. In this case, the number of the air cushions 31 or the horizontal cushions 32 can be set more or less than that of the drawings.

Meanwhile, as shown in FIG. 11, when the vibration due to the earthquake occurs, the switchboard 3 may be detached from the original installation position, so that a substation displacement monitoring unit capable of detecting the detachment and the degree of detachment can be provided.

The displacement monitoring unit includes at least one displacement sensor 41 installed at the appropriate position on the upper surface of the foundation concrete 7 or the appropriate position of the switchgear 3 along the bottom edge of the lower frame 12, A control power source 43 for supplying power to the control panel 45 and the displacement sensor 41 and a control panel 45 for controlling the control panel 45 and the displacement sensor 41. The control panel 45 receives the change signal and calculates the displacement and displacement distance of the switchboard 3, And a power monitoring panel 47 connected to the communication line 46 to receive displacement information of the switchboard 3.

Here, the appropriate position of the switchgear 3 where the displacement sensor 41 is installed may be the surface of the water distribution panel 3 or the interior of the switchboard 3. It is possible to detect that the whole of the switchboard 3 is displaced when it is installed on the surface of the switchboard 3 and it is possible to detect the relative displacement between various devices built in the switchboard 3 when the switchboard 3 is installed inside the switchboard 3 And the degree of displacement can be detected.

In this way, since the displacement and displacement of the switchboard 3 are monitored remotely, the degree of damage to the switchboard 3 caused by the vibration in the presence of vibration can be predicted without direct investigation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

3: Switchboard 7: Concrete foundation
8: distribution board 10: base frame
11: upper frame 12: lower frame
13: height adjusting bolt 13-1: fixing bolt
20: vibration damping portion 21: coil spring
22: center wire rope 23: cross wire rope
24a: elastic insert assembly 24b: permanent magnet elastic ball
25: neoprene dustproof pad 26: top plate
27: lower plate 31: air buffer
32: horizontal shock absorber 40: displacement / displacement monitoring unit
41: Displacement sensor 43: Control power source
45: control panel 46: communication line
47: Power monitoring control panel 111: Upper horizontal board
112: upper vertical plate 121: lower horizontal plate
122: Lower vertical plate 241: Elastic insert
242: retainer 311: air buffer member
313: Control valve 317: Air chamber
321: Earthquake-proof mount 325: Bracket

Claims

A switchboard;
A frame formed of a rigid member and disposed between a base of a lower portion of a power distribution board and a bottom surface of a power distribution board, comprising: a base frame comprising an upper frame and a lower frame detachable from each other; And
A coil spring disposed vertically between the upper frame and the lower frame, a cross wire rope disposed on a slope of the coil spring and provided on both sides of the slope in a diagonal direction so as to cross the diagonal direction, And a vibration damping part composed of a lower plate to which a lower end of the crossover wire rope and the lower end of the coil spring are coupled and an elastic insert assembly provided inside the coil spring,
The elastic insert assembly includes a plurality of elastic inserts formed of a cylindrical elastic body, and the elastic inserts are installed on the inner side of the coil spring with a predetermined distance therebetween, so that part or all of the coil spring is inserted into the outer peripheral surface of the elastic insert. The resonance frequencies of the portions where the elastic insert and the coil spring are coupled and the portions that are not coupled with each other are different from each other, thereby preventing a constant resonance frequency from being formed.

The method according to claim 1,
Wherein the vibration damping portion further comprises a center wire rope installed in a vertical direction inside the coil spring.

delete

The method according to claim 1,
Wherein the vibration damping part further comprises a ring-shaped retainer provided at an upper portion or a lower portion of the elastic insert to fix the position of the elastic insert.

A switchboard;
A frame formed of a rigid member and disposed between a base of a lower portion of a power distribution board and a bottom surface of a power distribution board, comprising: a base frame comprising an upper frame and a lower frame detachable from each other; And
A coil spring disposed vertically between the upper frame and the lower frame; a cross wire rope disposed on a slope of the coil spring, the cross wire rope being installed in a diagonal direction of the slope, An upper plate coupled to an upper end of the rope and an upper end of the coil spring, and a vibration damping portion including a lower plate coupled with a lower end of the cross wire rope and a lower end of the coil spring,
The vibration damping unit may further include a plurality of elastic cushioning particles filled in the inner side of the coil spring. The cushioning particle may be made of a permanent magnet elastic ball formed of a magnetic material, Wherein said first and second grounding members are connected to each other.

6. The method of claim 5,
And the buffer particles of the elastic material are spherical.

delete

6. The method according to claim 1 or 5,
Wherein the upper frame is composed of an upper vertical plate integrally bent downward from an upper horizontal flat plate and an upper horizontal flat plate,
The lower frame comprises a lower vertical plate and a lower vertical plate integrally bent upward from the lower horizontal plate,
Further comprising an air buffer installed between the upper vertical plate and the lower vertical plate at a position where the upper vertical plate and the lower vertical plate face each other and in which air is injected to generate an elastic force.

6. The method according to claim 1 or 5,
Wherein the upper frame comprises an upper vertical plate formed integrally with the upper horizontal flat plate and the upper horizontal flat plate,
A bracket comprising a flat plate which is bolted to the lower frame and a wall plate which is integrally bent upwardly from the flat plate and a vibration damping mount which is coupled to the wall plate and which damps horizontal vibration applied between the upper vertical plate and the wall plate, Further comprising: < RTI ID = 0.0 > a < / RTI >

6. The method according to claim 1 or 5,
A displacement sensor provided on the upper surface of the foundation frame or on the surface of the switchgear or in the interior of the switchboard along the edge of the bottom frame of the lower frame and a control panel for calculating the displacement and displacement of the switchgear received the pressure change signal from the displacement sensor, And a substation displacement monitoring unit including a control power source for supplying power to the displacement sensor, and a power monitoring control panel connected to the control board through a communication line to receive displacement information of the power transmission and distribution panel.

6. The method according to claim 1 or 5,
Wherein the switchgear further comprises a distribution board having a groove formed in a wall of a facility in which a switchboard is installed and installed so as to be embedded in the groove, the elastic insert being provided between an outer surface of the distribution board and an inner surface of the groove. .