KR101778155B1 - Distributing Board having Omnidirectional Earthquake-proof Function - Google Patents

Abstract

Disclosed is a distributing board having omnidirectional earthquake-proof performance, capable of safely protecting a distributing board with precision equipment from an earthquake as well as extending a cycle of all omnidirectional vibratory ground motions by combining a vibration cycle extending unit with an elastic design structure for absorbing the vibratory ground motions through a spring. To achieve the purpose, the present invention includes: a third spring absorbing vertical vibratory ground motions with an elastic design structure by a plurality of first and second springs, and horizontally surrounded by omnidirectional vibratory ground motions; upper and lower plates including a dented part to store the third spring; and a fourth spring for fixing the upper and lower plates. As such, a vibration cycle of shock force by the vibratory ground motions, delivered to the upper and lower plates, becomes considerably longer and a horizontal swing state occurs regardless of an entering direction of vibratory ground motions, and thus, the distributing board is subjected to little shock force and devices in the distributing board are protected, so the distributing board is able to be safely operated.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an earth-

The present invention relates to an electric distribution board for use in distributing electric power to various industrial facilities or residential facilities. The present invention relates to an electric distribution board having an earthquake-proof performance to prevent breakage due to twisting, tilting, .

According to the meteorological statistics of Korea's earthquake occurrence, it is confirmed that not only the incidence of earthquakes continues to increase but also earthquakes with a magnitude of 5 or more are occurring periodically. It is also recognized that Korea is no longer a safe zone from earthquakes The government is also making efforts to protect people and property from natural disasters such as earthquakes by enacting or strengthening various laws such as 'Natural Disaster Countermeasures Act' and 'Earthquake Disaster Countermeasures Act'.

In this regard, a large number of disaster facilities, such as large buildings and apartments, which can minimize the damage thereof in the event of an earthquake, have been newly established and expanded. Many of the disaster facilities have become useless when electric power or communication is interrupted Secondary disasters due to the interruption of power and communication occur. Therefore, the importance of earthquake-resistant design for power / communication facilities such as motor control panel, distribution board, communication control panel,

In response to such a request, a design concept of absorbing shocks by elasticity by a spring is applied to the structure of the present invention, so that a Korean Patent Registration No. 10-1081571 (hereinafter referred to as a quake-resistant device for a transmission and transmission system using an anti- 1, a fixing hole 18 for fixing the bottom surface of the building is formed, and a cylindrical portion 12 having an opened upper surface is protruded at the central portion. The center of the cylindrical portion 12 A through hole 15 is formed in the lower end of the screw hole to a predetermined space and a fixing plate 10 having a circular protrusion 16 formed on the outer circumferential surface of the cylinder 12, The elastic adjusting screw 22 is inserted into the screw hole formed at the center of the bottom of the cylinder 12 of the fixing plate 10 and moves up and down. On the upper side, An elastic regulating member 20 provided with an earthquake-proof spring 26 on the upper side of the pressing member 24 and a pressing member 24 for pressing the lower portion of the fixing plate 10 And an insertion portion 32 is provided on the inner side of the cylindrical frame so that the circular protrusion 16 of the fixing plate 10 is inserted into the hollow portion of the cylindrical frame, A support member 30 having a screw groove 36 formed at the center of the outer circumferential side surface thereof and a screw bolt 36 for fastening and fixing the screw 30 to the screw 100, (40).

The circular protrusion 16 formed on the outer circumferential surface of the cylinder 12 has a minimum portion where the cylinder 12 of the stationary plate 10 and the support member 30 are engaged with each other, And the circular protrusion 16 formed on the outer circumferential surface of the cylinder 12 serves as a central axis when rocking at a predetermined angle of? From front to back, left, and right due to earthquake and impact, It is possible to stably absorb the impact by the absorbing means 26, and furthermore, with the earthquake-proof spring 26, it is possible to mitigate and return to the original state by an impact on the transmission / In addition, when the upper and lower portions are shaken, the seismic spring 26 of the elastic regulating member 20 primarily absorbs the impact, and the circular protrusions 16 formed on the outer peripheral surface of the cylinder 12 during the upward and downward movements, And the impact transmitted to the circular protrusion 16 has the effect of relieving the impact of the absorption means 34. [

That is, the absorbing means 34 and the earthquake-proof spring 26 are arranged so that the wave direction of the wave due to the vibration and the wave direction of the medium are the same, and the wave direction of the secondary wave ) It acts as a buffer to prevent the impact caused by the two from affecting the power devices inside the switchboard.

On the other hand, Reference 1 has basic shock mitigation functions for the graphical P wave and S wave. However, since the waves transmitted through various types of strata and various types of building structures and facilities are transmitted in a complex traveling direction, There is a problem that it is difficult to exert a sufficient buffering function only with the vibration-resisting spring 26 installed on the line.

Therefore, in order to solve such a problem, a design concept for imparting an earthquake-proof performance by the elasticity of the spring and the shock-absorbing force of the vibration-proof pad is applied, and a Korean Patent Registration No. 1446890 (entitled " : Hereinafter referred to as "cited invention 2") has been proposed.

2, the upper plate 10a and the lower plate 10b having the respective space portions 15 and the upper and lower plates 10a and 10b of the upper and lower plates 10a and 10b, A pair of bearings 20 which are inserted into the bearing 15 so as not to be separated by the cover 25 so that both ends of the bearings 20 are fastened to each other, The elastic tube 40 is inserted between the upper and lower plates 10a and 10b. The elastic tube 40 is inserted between the shafts 30 and the cover 25, And a plurality of tension springs 60 connecting the upper and lower plates 10a and 10b to each other to constitute a vertical vibration damping pad 1, And an earthquake-resistant switchboard having the vibration-proof pad 1 is formed.

Accordingly, Reference 2 discloses that the vibration-proof pad 1 is vertically bent when an earthquake occurs, effectively absorbing and buffering vibrations and shocks acting in the vertical and horizontal directions, ultimately protecting the switchboard from earthquakes, The seismic force reaching the switchboard is applied not only horizontally and vertically but also in a combined direction. Therefore, in the case of all the above-mentioned cited invention 1 and 2, when the excessive torsional stress is applied, The vibration and impact caused by the earthquake can not be mitigated.

Therefore, in recent years, seismic design using seismic foundation has begun to be applied for seismic design. In fact, USC (University of Southern California) The San Francisco City Hall building, which was damaged by the Loma Prieta earthquake in 1989 due to damage caused by the earthquake, has never been reported to have been damaged by the earthquake. Tangshan railway bridge and front elevated bridge installed at the Incheon International Airport passenger terminal, which is a seismic structure, are spread and used safely.

There is a report that there is no damage when the isolation structure is applied to a building. Therefore, a similar concept is also introduced to the switchboard, which is called Korean Patent No. 10-1178264 (entitled " ) Have been proposed.

3 and 4, in order to impart an earthquake-proof function to the switchboard, a switchboard having an earthquake-proof function supports the switchboard case 100 and the switchboard case 100, and the switchboard case 100 is supported by the earthquake- (200) for blocking the generation of shock waves.

The switchboard 200 of the third cited reference 3 includes three plates arranged to overlap with each other and a plurality of tension springs disposed between the plates to damp shock waves such as seismic waves applied from below.

That is, according to the third reference 3, the switchboard mounting base 200 is composed of the lower plate 210, the intermediate plate 220, and the upper plate 230, and the lower ELM guides 242, 244, 246, 248, The upper and lower tensioning springs 282, 284, 286 and 288 and the upper tensioners 272, 274, 276 and 278, The intermediate plate 220, the upper plate 230, and the upper plate 230 are formed on the basis of the lower plate 210, unlike the first and second embodiments. So that the impact force applied to the switchboard can be absorbed. This method can be regarded as a form of a seismic design in which the natural period of the transmission and transmission system is lengthened so that the vibration energy of the ground due to the earthquake is not transmitted to the transmission / Therefore, it is expected to have a superior seismic performance compared with the elastic design structure of the first and second cited references 1 and 2 using spring and elastic tube.

On the other hand, in the case of the seismic structure according to the reference 3, it is necessary to fabricate three large plates such as the upper plate and the lower plate with a size larger than the entire bottom of the structure, and a large number of tension springs, ELM bearings, There is a problem in that the production cost is large, the weight is extremely large, and the weight is excessively heavy, so that it is difficult to apply to the switchgear and it is not widely spread.

In addition, the seismic structure according to the reference 3 has a problem that sufficient performance is exhibited when an impact force due to an earthquake enters in a direction coinciding with the angle at which the LM bearing, the LM guide, the tension spring, and the like are installed.

1. Korea Patent Registration No. 10-1081571 (Title: Seismic Resistant Device for Seismic Isolation Spring using Seismic Spring) 2. Korean Registered Patent No. 1446890 (entitled "Upper and lower refraction type dustproof pad and seismic switchboard with the same) 3. Korean Registered Patent No. 10-1178264 (entitled "Earthquake Resistant Switchgear)

The first object of the present invention is to provide an earthquake-resistant structure for earthquake-induced vibration, which has a period shorter than one second, And an object of the present invention is to provide a switchgear having an earthquake-proof performance that enables elastic behavior by changing a structure into a long-period region by design.

A second object of the present invention is to provide a switchgear having an earthquake-proof performance capable of applying a compact earthquake-resistant structure that can be mounted on the bottom edge of an ASSEMBLY by adopting a seismic design and an alternative structure that can greatly simplify its structure .

The third object of the present invention is to provide an earthquake-proof structure for preventing earthquake-induced vibration from entering the earthquake- And to provide an electric distribution panel having a high performance.

In order to accomplish the above object, the present invention provides a vibration device comprising: a vibration period extending unit having an annular third spring; a spacer composed of a bushing and a bolt for fixing the fixing structure and the bottom plate below the ground layer and the switchboard; And a fourth spring is disposed at the center of the upper plate and the lower plate, and the upper and lower ends of the fourth spring are fixed to the upper plate and the lower plate by the fastening means, A first spring is installed at a vertically central position of the substrate, a support plate is provided between the first spring and the switchboard, and a second spring is provided between the support plate and the first spring top, Wherein the joint element is composed of a head fixed to the upper end of the first spring and a bearing portion, And the bearing portion is fixed to the center of the bottom surface of the support plate and the lower end of the first spring is fixed to the bottom of the center of the support plate so that the head and the bearing portion are in contact with each other with a semicircular contact surface, Provide the switchboard.

Generally, since almost all earthquake-induced earthquakes are canceled within one second, in the present invention, when the earthquake-induced vibration enters the switchboard, the earthquake vibration transmitted to the upper and lower plates installed above and below the third spring The swing state in the horizontal direction is generated by the earthquake vibration regardless of the approach direction. When the power over the third spring rises to the side of the switchboard, Due to the composite elastic absorbing function of the radially installed second spring, impact force due to earthquake vibration is hardly transmitted to the switchboard.

Accordingly, the present invention provides an effect that the switchboard can be safely operated by protecting the devices inside the switchboard even when strong earthquake motions are introduced.

Further, unlike the cited invention, the present invention can extend the vibration period of the earthquake-induced vibration entering in all directions, thereby providing a reliable and stable seismic performance.

Particularly, the present invention can minimize the size of the seismic isolation structure while minimizing the size of the seismic isolation structure. Therefore, the present invention can be conveniently installed at the edge of the bottom surface of the power distribution board and can be conveniently used. There is a useful effect enabled.

1 is a longitudinal sectional view showing a structure of a vibration-damping device for a transmission / distribution system using a conventional earthquake-resistant spring.
2 is an exploded perspective view showing a structure of a conventional vertical vibration damping pad.
3 is a front view showing an installation example of an electric distribution board according to a conventional seismic design.
4 is an exploded perspective view showing a vibration cycle extending means of a distribution board according to a conventional seismic design.
5 is a perspective view showing a vibration period extending unit according to the present invention.
6 is an exploded perspective view showing a structure of a vibration period extending unit according to the present invention;
7 is a vertical sectional view showing a construction state using the vibration period extending means according to the present invention.
8 is a plan view showing a structure of a vibration period extending unit according to the present invention.
9 is a plan view showing a structure of a vibration period extending unit according to another embodiment of the present invention.
10 is a longitudinal sectional view showing the behavior of the distribution board in the case where there is a ground motion in which the ground layer moves to the left side in the present invention.
11 is a longitudinal sectional view showing the behavior of the distribution board in the case where there is a earthquake in which the strata move to the right side in the present invention.
12 is a longitudinal sectional view showing a structure of an embodiment in which an elastic structure provided with a first spring is provided between the upper portion of the vibration cycle extending means and the bottom surface of the switchboard according to the present invention.
FIG. 13 is a perspective view showing the appearance of the embodiment according to the present invention shown in FIG. 12; FIG.
14 is a longitudinal sectional view showing the structure of an embodiment in which an elastic structure provided with a first spring and a second spring provided in a radial and tilted manner is provided between the upper portion of the vibration cycle extending means and the bottom surface of the switchboard.
FIG. 15 is a perspective view showing the appearance of the embodiment of the present invention shown in FIG. 14; FIG.

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

6 is an external perspective view of the vibration period extending unit 500 according to the present invention, and FIG. 6 is a specific perspective view of the vibration period extending unit 500 according to the present invention. Sectional view and a third spring 501 seated in the recess 503 of FIG. 8 and a fourth spring 502 at the center.

As can be seen from this figure, the switchboard with forward earthquake-proof performance according to the present invention includes a fixed structure 101 fixed to the ground layer 100, a third spring (not shown) annularly formed between the bottom plate 300 of the bottom of the switchboard 501 are brought into close contact with the upper plate 504 and the recessed portion 503 of the lower plate 505 and the upper and lower ends of the fourth spring 502 are fixed to the center of the upper plate 504 and the lower plate 505 The vibration period extending means 500 includes a bushing 202 and a spacer 200 formed of a bolt 201. The vibration period extending means 500 includes a bushing 202 and a bolt 201, To the stationary structural body 101 and the bottom plate 300 of the bottom of the power distribution board.

7, the center of the upper plate 504 and the lower plate 505 coincides with the center of the inner plate of the upper plate 504 and the lower plate 505, and a fourth spring 502 And the third spring 501 is fixed to the concave portion 503 of the upper plate 504 and the lower plate 505. The upper plate 504 and the lower plate 505 are fixed to each other by fastening means 506 such as bolts and nuts The vibrating period extending means 500 constitutes a vibrating cycle extending means 500. The vibrating cycle extending means 500 is constituted by a spacer 200 arranged four at a time and four below the vibrating cycle extending means 500, And the number of the spacers 200 can be appropriately adjusted in consideration of the scale of the switchboard and the like.

The load of the switchboard continuously applies pressure to the upper end of the third spring 501 through the recessed portion 503 of the upper plate 504 via the base plate 300 and the spacer 200, 501 apply pressure to the recessed portion 503 of the lower plate 505 to transmit the load to the stationary structural body 101 through the spacer 200. [

In other words, by applying a repulsive force to the concave portion 503 of the upper plate 504 and the lower plate 505 so that the elastic force of the third spring 501 can offset the load corresponding to the load of the switchboard, And the balance of the third spring 501 is maintained at a proper level corresponding to the load of the switchboard in order to maintain the balanced state, , The number of turns, and the like need to be optimally designed.

In this case, when the stratum 100 moves due to the earthquake-induced vibration, the third spring 501 is deformed in spite of the direction of the earthquake-induced vibration due to the load of the switchboard, and the current state is maintained for a predetermined time, It is possible to prevent the switchboard from being impacted by the vibration caused by the earthquake vibration.

9, when the stratum 100 moves to the left in the drawing, the recessed portion 503 of the lower plate 505 via the fixing structure 101 and the spacer 200 is pressed against the third spring The switchboard pushes the lower portion of the switchboard 501 to the left in the drawing, but the switchboard continues to apply the downward vertical force by the direction of the arrow corresponding to the weight downward with inertia to maintain the current position according to the first law of motion The recessed portion 503 of the upper plate 504 pushes the upper portion of the third spring 501 in the vertical direction through the base plate 300 and the spacer 200. [

As a result, two forces having different directions of motion are applied to the upper and lower portions of the third spring 501, and twist occurs. As a result, as shown in FIG. 10, the third spring 501 is deformed into an elliptical shape in the original circular shape. In the case of the fourth spring 502, the downward movement is caused by the movement of the lower plate 505 The center of the fourth plate 502 is shifted from the center of the fourth plate 502, and the fourth spring 502 is also twisted.

Since the earthquake-induced vibrations disappear within one second, the earthquake motions continuously applied in a short period of time are transmitted to the third spring 501 and resonance the third spring 501 is restored to its original position and then transmitted to the switchboard via the recessed portion 503 and the upper plate 504 via the spacer 200 and the bottom plate 300 The period of the earthquake-induced vibration is prolonged, so that the period of the earthquake-induced vibration is prolonged and changed. As a result, the strength of the earthquake-induced vibration transmitted to the switchboard can be remarkably reduced.

11, the concave portion 503 of the lower plate 505 via the stationary structure 101 and the spacer 200 is positioned at the third (right) side of the lower plate 505 even when the ground layer 100 moves to the right in the drawing, The lower portion of the spring 501 is pushed to the right in the drawing. However, since the switchboard continuously applies a downward force corresponding to the weight with inertia to maintain the current position according to the first law of motion, The recessed portion 503 of the upper plate 504 pushes the upper portion of the third spring 501 in the vertical direction through the spacer 200 and the spacer 200. [

As a result, two forces having different directions of motion are applied to the upper and lower portions of the third spring 501, resulting in twisting. As a result, as shown in FIG. 11, the third spring 501 is deformed into an elliptical shape in the original circular shape. In the case of the fourth spring 502, the center moves according to the movement of the lower plate 505, The center of the plate 504 is shifted from the center, and the fourth spring 502 is also twisted.

In the present invention, although the ground layer 100 is moved to the right by the earthquake-induced vibration, the switchboard keeps its current position, and since the earthquake vibration disappears within one second, the third spring 501 is restored to its original state, Since the period of the earthquake vibration transmitted to the switchboard through the phase plate 504, the spacer 200, and the bottom plate 300 is extended or changed, the period of the earthquake motions is changed to remarkably reduce the strength of the earthquake- And returns to the state shown in FIG.

Particularly, as shown in Fig. 8, the vibration period extending unit 500 according to the present invention is wound in a circular shape which is deformable in all directions. Therefore, regardless of which direction the earthquake vibration enters, it is possible to stably extend the vibration period.

8 shows an embodiment in which a coil for making a spring is wound radially so that the entire shape is circular. However, as shown in Fig. 9, the winding angle of the coil is not uniform, It is possible to make it possible to smoothly deform by the earthquake vibration entering from all directions so as to be wound in a ratchet gear shape rather than a radial shape and to optimize the angle so as to be able to extend the vibration period of the earthquake vibration .

In addition, since it is necessary for the present invention to protect precision devices of the switchboard from the impact force still transmitted upward via the third spring 501, the present invention can additionally provide impact force mitigation means by the elastic structure 600 .

12, a substrate 301 is provided on the base plate 300, a first spring 601 is installed at a vertically central position of the substrate 301, the first spring 601, And a joint element 604 is provided between the support plate 603 and the upper end of the first spring 601. The joint element 604 is connected to the first spring 601, And the bearing portion 606 is fixed to the lower center of the support plate 603. The head portion 605 and the bearing portion 606 are formed as semicircular contact surfaces The upper end of the first spring 601 is coupled to the protrusion 607 of the head 605 and the lower end of the first spring 601 is coupled to the protrusion 608 formed on the upper center of the substrate 301 . The embodiment of the present invention shown in FIG. 12 is shown in a perspective view of FIG.

According to this embodiment, the earthquake vibration generated in the ground layer 100 reaches the substrate 301 in a damped state due to a large vibration period as it passes through the vibration period extending means 500, and the elasticity of the first spring 601 And is transmitted to the support plate 603 in a more attenuated state.

In this embodiment, the head 605 of the first spring 601 coupled to the bearing portion 606 on the bottom surface of the support plate 603 is deflected by the bearing portion 606 when vibration due to the biased vibration is generated, The bolts are fixed to the center of the support plate 603 and are inserted into the fixtures formed at the lower end of the switchboard, and then the nut is fastened However, it is needless to say that it can be fixed by various structures and various methods as necessary.

14, a plurality of second springs 602 are radially and radially arranged around a first spring 601, and a head 605 is provided above the first spring 601, And the projections 608 of the center of the upper surface of the substrate 301 may be coupled to the lower portion of the first spring 601. At the upper and lower portions of the second spring 602, The projections 608 protruding downward from the bottom surface of the substrate 603 and the protrusions 608 formed around the top surface of the substrate 301 can be coupled.

The semicircular head 605 having the protrusion 607 coupled to the upper end of the first spring 601 may be coupled to the semicircular bearing 606 fixed to the center bottom surface of the support plate 603. [

According to this embodiment, as shown in FIGS. 12 and 13, the vibration force applied in the vertical direction can be mitigated by changing the vibration period by the elastic force of the first spring 601, The vibration force transmitted from the right direction is absorbed by the elastic structure 600 constituted by the plurality of second springs 602 which are arranged radially and tilted with respect to the first spring 601, The present invention of this embodiment is shown in a perspective view of Fig.

While the present invention has been described in connection with what is presently considered to be preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

100: stratum corneum 101: fixing structure 200: spacer
201: bolt 202: bushing 300: base plate
301: substrate 500: oscillation period extending means 501: third spring
502: fourth spring 503: recessed portion 504: phase plate
505: lower plate 506: fastening means 600: elastic structure
601: first spring 602: second spring 603:
604: joint element 605: head 606:
607: protrusion of the head 608: protrusion of the substrate and the support plate

Claims (3)

A vibration period extending means provided with an annular third spring,
A spacer composed of a bushing and a bolt for fixing the fixed structure and the bottom plate to each other below the ground layer and the switchboard,
The upper plate and the lower plate are provided with a recessed portion for receiving the third spring,
A fourth spring is disposed at the center of the upper plate and the lower plate and the upper and lower ends of the fourth spring are fixed to the center of the upper plate and the lower plate by fastening means,
A first spring is installed at a vertically central position of the substrate, a support plate is provided between the first spring and the switchboard, a joint element is provided between the support plate and the top of the first spring, ,
Wherein the bearing element is fixed to the lower end of the center of the support plate, the head and the bearing part are in contact with each other through a semicircular contact surface, the bearing part is fixed to the center of the bottom of the support plate, And a lower end of the first spring is coupled to a protrusion formed on an upper surface of the center of the substrate. delete The method according to claim 1,
A plurality of second springs are radially and radially arranged around the first spring and protrusions protruding downward from the bottom surface of the support plate and protrusions formed around the top surface of the substrate are coupled to the upper and lower portions of the second spring And an earthquake-proof performance.

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