KR101757664B1 - Switchboard equipped with earthquake-resistance frame and the method of earthquake-resistance switchboard - Google Patents

Abstract

The present invention relates to a switchboard having an earthquake-resistant frame structure having means for simultaneously supporting three inner wall surfaces of a switchboard, and a method of manufacturing the switchboard. The switchboard comprises a housing, a plurality of power distribution apparatuses housed in the housing, And a vertical wall separating an inner space of the enclosure so as to separate and accommodate a plurality of power distribution apparatuses, characterized in that the inner surface of the enclosure wall, the bottom surface of the enclosure, the upper surface of the enclosure ceiling, A triangular frame provided adjacent to a bottom surface, a triangular frame adjacent to a point where three surfaces of the vertical wall are simultaneously contacted to one point, and all three sides of the triangular frame are contacted with any one of the three surfaces Reinforced steel plate which is formed so as to be formed in the cabinet, An outer panel having an earthquake-resistant frame structure capable of simultaneously dispersing external forces on three axes of XYZ that form spatial coordinates at the point where the plane of the plane intersects with each other and which can be easily manufactured and manufactured and installed at a minimum cost, And to provide a manufacturing method.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthquake-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a switchboard having an earthquake-resistant frame structure and a method of manufacturing the same, and more particularly to an switchboard having a frame for simultaneously supporting three inner wall surfaces of an switchboard, and a method of manufacturing the same.

In general, switchgear is an electrical facility that supplies industrial power to users securely, and is a device used for monitoring, controlling, and protecting electrical systems when power is sent from a power plant or substation to a customer several times.

The switchboard comprises an enclosure defining an internal space of a predetermined size; And a distribution device such as a busbar, an air circuit breaker, a wiring breaker, and a relay, which are installed inside the enclosure and installed for distribution, control, and protection to various electric equipment systems.

The enclosure should be able to safely store the power distribution device and satisfy the conditions that it is strong against vibration and external impact, but the manufacturing cost is low and the inside and outside appearance should be considerable.

However, there are many contacts inside the switchboard because there are many distribution devices inside. In this case, if there is a large vibration such as an earthquake, there may be a problem in the stability of the contact point. In such a case, power supply to the building or facility in which the switchboard is installed may be interrupted and large and small accidents may result in great loss of life and property.

Therefore, the switchboard needs to have an earthquake-proof earthquake resistant structure.

An earthquake-resistant switchboard shall have a maximum unidirectional maximum displacement width of 75mm or less during the earthquake, and shall prevent the detachment of the fixed part, frame deformation or breakage.

Especially in Gyeongju, the largest earthquake of 5.8 magnitude ever occurred since 1978, which occurred only a few minutes after the magnitude of 5.1 earthquake occurred at a distance of only 1km. Since then, there have been frequent aftershocks, and it has been proven that our country is never a safe area in the earthquake.

Therefore, the technology for seismic switchboards is more urgently required than in the past.

[0003] A conventional art relating to such an earthquake-resistant switchboard is disclosed in Japanese Unexamined Patent Application Publication No. 2001-0094223 (published on Oct. 31, 2001) 'Endurance strengthening method endurance steel body and seismic strengthening method' have.

As shown in FIG. 1, the prior art includes a folding plate 2 folded to match the shape of an edge so as to be attached to a corner of a beam-column joint of the structure 20, And a corner support member 3 which is vertically integrated with the bending plate 2 and supports the bending plate 2 so as to be fixedly attached to the edges of the four beam-column joints of the structure 20, To an endurance strengthening type endurance advanced rigid body which improves the performance.

The above-described conventional anti-vibration rigid body is additionally installed in a structure having an earthquake-proof design to improve seismic performance.

However, since the strength-imparting effect is exerted only on two axes out of three axes of XYZ which form spatial coordinates, the inner-strength steel body according to the conventional art has a corner point (hereinafter referred to as an inner corner) A total of three should be installed in order to distribute the load applied to each of the three surfaces in a point. Therefore, installation time, cost, and cost of constructing reinforcement are large.

Therefore, it is possible to distribute the external force simultaneously to the three axes of XYZ which form the spatial coordinates at the point where the three sides meet at the inside of the switchgear with only one member, and the stiffener which can be easily manufactured and manufactured and installed at a minimum cost A technique relating to an installed seismic switchboard is required.

Patent Publication No. 2001-0094223 (published on October 31, 2001)

Registration Utility Model No. 20-0464077 (Registration date: December 04, 2012)

Registration Utility Model No. 20-0446866 (Registration date: Nov. 27, 2009)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a three-axis XYZ- The present invention provides a switchboard having a reinforced earthquake-resistant frame capable of being manufactured and installed at a minimum cost, and a manufacturing method thereof.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided an electric cabinet having an earthquake-resistant frame structure according to the present invention, comprising: a housing; a plurality of power distribution apparatuses housed in the housing; a horizontal shelf for housing power distribution apparatuses in multiple layers; Wherein the inner surface of the enclosure wall, the bottom surface of the enclosure, the upper surface or bottom surface of the horizontal shelf, the upper surface or the lower surface of the horizontal shelf, the vertical surface of the enclosure, A triangular frame provided adjacent to a point formed at a point of contact with a point of the triangular frame, wherein all the three sides of the triangular frame are formed so as to be in contact with any one of the three surfaces.

The seismic strengthening plate is preferably an equilateral triangle.

In this case, preferably, the seismic strengthening plate is a triangle formed by bisecting a diagonal line of a square plate, and vertexes having an internal angle of 90 degrees are folded by 15 degrees on both sides, Wherein the surplus surface is divided into a first surplus surface that is in surface contact with two of the three surfaces and a second surplus surface that is in surface contact with one of the three surfaces, A bolt and a nut for coupling the first surplus surface and the vertical surface, and an earthquake-resistant reinforcing plate for fixing the second surplus surface to the horizontal surface by bolts and nuts.

Meanwhile, a method for manufacturing a seismic resistant switchboard according to the present invention includes a housing, a plurality of power distribution apparatuses built in the housing, a horizontal shelf for housing the power distribution apparatus in multiple layers, and a plurality of power distribution apparatuses A method of manufacturing an earthquake-resistant switchboard using an ordinary distribution board comprising a vertical wall, the method comprising the steps of: forming an inner surface of the enclosure wall, a bottom surface of the enclosure, a front surface of the enclosure ceiling, an upper surface or a bottom surface of the horizontal shelf, And a triangular-shaped seismic reinforcing plate is provided at a point where two vertical surfaces are formed by contacting at one point at the same time and all three sides are in contact with one of horizontal surfaces and two vertical surfaces, And is supported at the same time by the seismic reinforcing plate.

Preferably, the seismic strengthening plate is of an equilateral triangle. Particularly, the seismic strengthening plate is manufactured by bending a square steel plate.

Preferably, the seismic strengthening plate is manufactured by bending the steel plate with respect to the diagonal line of the square steel plate, or by forming the isosceles triangle formed by bisecting the square steel plate with respect to the diagonal line.

In this case, the seismic strengthening plate is manufactured by bending 15 degrees on both sides of 90 degrees with respect to a vertex angle of the isosceles triangle having 90 degrees.

The excess surface formed on both sides of the isosceles triangle by bending the seismic reinforcing plate by 15 degrees is in surface contact with each of the two vertical surfaces inside the enclosure. Preferably, the excess surface is in contact with the vertical surface Is bent in the horizontal direction so as to be in contact with the horizontal plane.

In this case, the seismic strengthening plate is fixed to the inside of the switchboard by fastening it to the vertical surface and the horizontal surface by bolts and nuts at a portion of the surplus surface which is in surface contact with each of the vertical surfaces and a surface-

In the seismic isolation panel and the method for manufacturing an earthquake-resistant switchboard according to the present invention, the external force can be simultaneously dispersed in three axes of X, Y, and Z, which form spatial coordinates at the point where three faces meet inside the switchboard, There is an effect that a reinforcing material capable of being manufactured and installed at a minimum cost is installed.

1 is a partial perspective view showing a prior art,
2 is a transmission perspective view of an earthquake-resistant switchboard according to the present invention,
3 is a conceptual diagram showing an earthquake-resistant reinforced plate geometrically in the present invention,
4A to 4E are conceptual diagrams showing a procedure for manufacturing an anti-seismic reinforcing plate,
5A to 5D are conceptual views showing a second embodiment of the seismic strengthening plate,

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The earthquake-resistant switchboard 1 according to the present invention is formed by installing an earthquake-resistant reinforcement plate 10 to be described later inside a conventional switchboard.

In general, the switchboard requires a separate internal device support depending on the place of use. However, it is generally required to separate the enclosure, the power distribution apparatus built in the enclosure, the horizontal shelf in which the power distribution apparatus is housed, and a plurality of power distribution apparatuses And a vertical wall separating the inner space of the enclosure in the horizontal direction. Here, the power distribution device is a device for distributing the power coming from the outside to the buildings or the facilities where the switchboard is installed according to the demand, and includes a high pressure panel, a low pressure panel, an MCC panel, and a distribution panel.

The earthquake-resistant switchboard (1) according to the present invention has a structure in which the earthquake-resistant reinforcement plate (1) is disposed at a point corresponding to the origin in a coordinate of the XYZ axis, which is geometrically three- 1) is installed. Such an installation view is conceptually shown in Fig. In FIG. 3, a triangular-shaped frame indicated by a hatch corresponds to the seismic strengthening plate 10.

The maximum unidirectional maximum displacement width of the earthquake-resistant switchboard (1) shall be 75 mm or less. And a structure that does not cause separation of the fixed part, frame deformation or breakage.

When the required cross-sectional area of the structural members is selected, the risk of deformation and breakage of the switchboard is reduced even if the switchboard is manufactured by applying the safety factor. This is because, if a column and a beam having a certain width are provided and the both ends are supported, the displacement that can be generated when there is a bending load is as much as 48 times as much as the one-end support structure.

Here, beams and columns should be installed in structures that are reinforced by X, Y, Z axes in the direction of input motion. In other words, it is a structure in which the interval supported by beams or pillars is small in X, Y, and Z directions and both ends are supported by pillars, and a large supporting area is required for a seismic resistant structure.

The frame constituting the frame of the switchboard is supported at both ends. The steel plate which is the material of the enclosure constituting the enclosure of the switchboard is 1.2 m X 2.4 m. If a column or a beam is installed based on the size of the steel plate, The maximum spacing between the columns is 2.3 m.

At this time, it is necessary to minimize the support interval and to resist deformation due to tension and compression in the X, Y, and Z axes of the input motion direction. To this end, the seismic strengthening plate 10 is preferably in the form of an equilateral triangle.

This is because, as shown in FIG. 3, it is most advantageous to have an equilateral triangular shape so that the force exerted by the seismic reinforcing plate is uniformly divided into three axes. In other words, when the enclosure constituting the enclosure of the switchboard is observed three-dimensionally, each side of the equilateral triangle in the form of the seismic strengthening plate (1) with respect to all the X, Y, The displacement deviation can be reduced to 1/2 or less with respect to all of the X, Y, and Z axes in the input motion direction.

When the horizontal gap between the seismic strengthening plates 10 is set to be less than 1.5 m, the elastic modulus E of the iron is 210,000 N / mm 2 / the length between the supports is 21,000 kgf X square triangular shear surface area [mm 2].

When one seismic strengthening plate 10 is installed over three surfaces, as shown in FIG. 1, at least three reinforcing plates must be installed at the positions where the three surfaces meet, so that the load is distributed on three surfaces. An effective resistance against distortion or buckling becomes possible.

Meanwhile, the seismic strengthening plate 10 can be manufactured by bending a rectangular plate material. At this time, the remaining bent portions excluding the equilateral triangular portion are brought into surface contact with each other at the point where the three surfaces meet, And the seismic strengthening plate 10 is fixed inside the switchboard by fastening the nut. This will be described in more detail with reference to the drawings in the method of manufacturing the earthquake-resistant switchboard 1 to be described later.

4A to 4E, a method for manufacturing an anti-vibration board 1 according to the present invention includes a housing, a plurality of power distribution apparatuses housed in the housing, a horizontal shelf for housing power distribution apparatuses in multiple layers, and a plurality of power distribution apparatuses (Hereinafter, referred to as " upper surface " or " lower surface ") of a vertical wall, Wall surface, etc.) in which a horizontal plane and two vertical planes are simultaneously contacted at one point, and all three sides are in contact with one horizontal plane and two vertical planes, The reinforcing plate 10 is installed so that the one horizontal plane and the two vertical planes are simultaneously supported by the seismic reinforcing plate 10. [

Hereinafter, a point where one horizontal plane and two vertical planes meet is referred to as an " inner corner point O ".

In this case, preferably, the seismic strengthening plate 10 is formed in an equilateral triangle shape, and the seismic strengthening plate 10 is formed into an equilateral triangle shape by bending a square plate. If the square shape is bent and formed into a regular triangle rather than directly cut in an equilateral triangle shape, the cutting process can be performed in a direction perpendicular to the traveling direction of the steel plate coil, thereby simplifying the cutting process. Further, And the earthquake-resistant reinforcing plate 10 is fixed by a simple and firm fixation by fixing the surface-contacted portions with bolts and nuts.

The square plate may have a shape as shown in FIG. 4A. Referring to FIG. 4A, two isosceles triangles R1S1R3 or R1R2R3 are fabricated by first bending 180 degrees on the diagonal line AA of the square or by cutting the diagonal line AA.

The triangle formed by points R1, S2, and R3 is an isosceles triangle whose interior angle at point S1 is 90 degrees. Here, when both sides of the inner angle 90 of the S1 point are bent by 15 degrees, an equilateral triangle is formed which is surrounded by the S1 point, the S2 point and the S3 point. The plane that is bent by 15 degrees is a triangle having S1, S2, and R in FIG. 4A and a triangle having S1, A, and S3 as corners. Here, the two triangles formed by bending at 15 degrees are referred to as a 'surplus surface 12'.

The appearance of the seismic strengthening plate 10 before the excess surface 12 is bent at the inner corner point O is as shown in Fig. 4C. Here, the shape in which the surplus surface 12 is bent is shown in Fig. 4D. However, when the surplus surface 12 is brought into surface contact with the ZX coordinate plane and the ZY coordinate plane, which are two vertical surfaces of the three surfaces that meet at the inner corner point O, a portion disposed below the XY coordinate plane as the horizontal plane is generated.

This figure is shown in FIG. 4B with reference to the ZX coordinate plane. Here, a part of the surplus surface 12 which is in surface contact with the ZX coordinate surface on the X axis with reference to the X axis is referred to as a 'first surplus surface 12a', and a surface contact with the ZX coordinate surface under the X axis And the portion of the surplus surface will be referred to as a 'second surplus surface 12b'.

Since the second surplus surface 12b can not penetrate into the enclosure constituting the actual earthquake-resistant switchboard 1 below the horizontal plane, the second surplus surface 12b is again bent in the horizontal direction, and as shown in FIG. 4E, Face to face in horizontal plane.

At this time, since all three coordinate surfaces of XY, ZX and ZY correspond to the 'wall surface or the like' in the earthquake-resistant switchboard, the first surplus surface 12a and the second surplus surface 12b are fixed to the wall surface ', The installation of the seismic strengthening plate 10 is completed.

On the other hand, the seismic strengthening plate 10 may be used to provide an earthquake-proof reinforcement even at an arbitrary point at which two vertical walls meet, that is, a vertical edge, even if the inner corner point O is not provided.

As shown in Fig. 5A, the same reinforcing plate as the seismic strengthening plate 10 and the same square plate material as the square plate material in Fig. 4A are prepared as shown in Fig. 5D. In this case, the square plate is folded in half or cut to form an isosceles triangle with reference to the diagonal line AA in FIG. 5D. Here, the isosceles triangle is referred to as a " connecting plate 20 ".

As shown in FIG. 5A, when the connecting plate 20 is brought into close contact with the connecting plate 20 so that the vertex angle of the connecting plate 20 is 90 degrees and the inner angle is 90 degrees, the S1R1 side and the S1R3 side are respectively connected to the two vertical surfaces . At this time, the same seismic reinforcing plate as the above-described seismic reinforcing plate is installed on the upper and lower portions of the connecting plate 20 as shown in FIG. 5A. In this case, the seismic reinforcing plate installed on the upper surface of the connecting plate 20 is referred to as an upper seismic reinforcing plate 10a, and the seismic reinforcing plate provided on the lower surface of the connecting plate 20 is referred to as a lower seismic reinforcing plate 10b .

If the upper seismic reinforcement plate 10a, the connecting plate 20 and the lower seismic reinforcement plate 10b are provided at the corners where the two vertical surfaces meet, the buckling phenomenon that can be generated in the height direction can be effectively Can be prevented.

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.

1: Seismic isolation panel 10: Seismic reinforcing plate
10a: upper seismic reinforcing plate 10b: lower seismic reinforcing plate
11: a regular triangular reinforcing plate 12: a surplus surface
12a: first surplus surface 12b: second surplus surface
13: Horizontal plane fastening hole 14: Vertical plane fastening hole
20: Connection plate O: Inner corner point

Claims (10)

A conventional switchboard comprising a housing, a plurality of power distribution apparatuses housed in the housing, a horizontal shelf for housing the power distribution apparatus in multiple layers, and a vertical wall separating the inner space of the enclosure so as to separately house a plurality of power distribution apparatuses,
An equilateral triangular frame provided adjacently to a point where three surfaces of the inner surface of the housing wall, the bottom surface of the housing, the front surface of the enclosure, the upper surface or the bottom surface of the horizontal shelf, Wherein an anti-seismic reinforcing plate is formed in such a manner that all three sides constituting a regular triangular frame are brought into contact with any one of the three surfaces,
Wherein the seismic strengthening plate comprises a triangle formed by bisecting a diagonal line of a square plate, the vertex having an internal angle of 90 degrees bent by 15 degrees on both sides, and remaining portions except for a surplus surface formed on both sides,
Wherein the surplus surface is divided into a first surplus surface which is in surface contact with two vertical surfaces of the three surfaces and a second surplus surface which is in surface contact with a horizontal surface of one of the three surfaces,
And a seismic reinforcing plate is fixedly installed by a bolt and a nut for connecting the first surplus surface and the vertical surface and a bolt and a nut for joining the second surplus surface and the horizontal surface. . delete delete A horizontal shelf for housing multi-layer distribution devices, and an ordinary distribution panel made of a vertical wall separating the internal space of the enclosure so as to separate and accommodate a plurality of distribution devices, As a method of manufacturing an electric distribution board,
And a horizontal surface of the vertical wall, one horizontal surface of the vertical wall and one horizontal surface of the horizontal wall, and two vertical surfaces are formed in contact with one point at the same time. And an earthquake-resistant reinforcement plate, which is an equilateral triangle-shaped frame formed by bending a square steel plate so as to be formed so as to be in contact with any one of a horizontal plane and two vertical planes, The three sides are simultaneously supported by the seismic reinforcing plate,
Wherein the earthquake-resistant reinforcement plate is formed of an isosceles triangle formed by bending the diagonal line of the square steel plate or bisecting the diagonal line with respect to the diagonal line.
delete delete delete 5. The method of claim 4,
Wherein the seismic strengthening plate is fabricated by bending 15 degrees on both sides of the 90 degrees with respect to a vertex angle of the inner angle of the isosceles triangle being 90 degrees.
9. The method of claim 8,
The surplus surface formed on both sides of the isosceles triangle by bending the seismic reinforcing plate by 15 degrees is in surface contact with the two vertical surfaces inside the enclosure,
Wherein a portion of the surplus surface that is not in contact with a vertical plane is bent in a horizontal direction so as to contact the one horizontal surface.
10. The method of claim 9,
Wherein the seismic strengthening plate is fixed by being fixed to a vertical surface and a horizontal surface by a bolt and a nut at a portion of the surplus surface which is in surface contact with each of the vertical surfaces and a surface of which is in surface contact with the horizontal surface. Way.

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