KR102369353B1 - Seismic isolation type swithboards - Google Patents

Abstract

Disclosed is a seismic switchboard capable of stably maintaining seismic properties. According to the present invention, the seismic switchboard comprises: an upper plate in which a fixing bolt is coupled to the central part and first protrusions are formed on both sides thereof; a low plate having bolt holes formed in the central part, having second protrusions formed on both sides thereof, and having a first ball seat formed on the upper surface thereof; a ball stud coupled to the first ball seat; a socket plate wrapping the lower part of the ball stud in the second ball seat so that a ball moves freely; an upper supporter having a cup part formed on the upper surface to receive a rolling ball to freely rotate, having a spring upper seat formed on the lower surface thereof, and having screw holes formed on both sides thereof to communicate with the spring upper seat; a plurality of first coil springs in which upper parts thereof come in contact with the spring upper seat to absorb vibrations in the vertical direction elastically; a low supporter in which the lower part of the first coil spring is inserted while the upper part is inserted into the spring upper seat, and having slot grooves formed on both sides to communicate with the screw holes of the upper supporter; a plurality of adjustment bolts fastened to each screw hole of the upper supporter by screwing and having a holding pin integrally formed on one side; and a plurality of second coil springs disposed between the slot groove of the row supporter and the adjustment bolt to elastically absorb vibration in the horizontal direction while elastically maintaining front and rear and left and right gaps between the upper supporter and the row supporter by elasticity.

Description

SEISMIC ISOLATION TYPE SWITHBOARDS

The present invention relates to a seismic isolating switchgear having a structure that absorbs earthquake and roll vibrations in horizontal and vertical directions to damp seismic energy, and more particularly, the damping effect for vibrations in any direction during an earthquake is maintained for a long time to improve seismic performance. It relates to a seismic isolation switchgear that improves and strengthens durability against earthquakes.

Today, damage recovery measures in the event of a disaster are established on the premise that the electricity supply is stable. In the case of switchgears that do this, it is required to secure seismic stability and seismic performance.

Since these switchgears require continuous inspection, repair and maintenance, most of them have a structure in which various control devices for power facilities are compactly accommodated in a package type in a modular cubicle type, that is, a rectangular parallelepiped-shaped steel cabinet. Because of structural and structural characteristics, it does not move only in the vertical or horizontal direction due to vibrations such as earthquakes, but moves in arbitrary directions, such as tilting up, down, left and right. .

Currently, the methods commonly used to improve the seismic performance of the switchgear are to increase the strength of the frame or to increase the lateral strength by adding braces. , a method of absorbing with a device such as a ball bearing, and a method of separating the switchboard from the ground by installing an isolation device.

However, in the case of a spring, because it attenuates only vertical vibration, it is not suitable for damping the horizontal force in an earthquake. In the case of a rubber pad, it is fixed to the structure in the vertical direction to support it, and in the horizontal direction, it is horizontal due to the damping characteristics of the elastic rubber material. It is not suitable for damping vertical vibrations as it separates the structure from seismic loads.

Accordingly, conventional technologies applied to switchgear attenuate seismic vibration by combining a vibration-proof element that can withstand only vertical rigidity and a vibration-proof element that withstands only horizontal rigidity, but it is difficult to respond immediately to vibration in other directions. As the effect is significantly reduced, there is a problem in that the switchgear is conducted due to the inclination direction.

In recent years, switchboards have been developed to meet the specific displacement limits suggested by the state or organization, that is, to reduce the horizontal displacement that occurs during earthquakes. Unlike vibration damping, which reduces or attenuates vibration by applying it, a seismic isolator that separates the structure to be protected from the ground and absorbs vibration is mainly applied.

These seismic isolators are largely divided into the elastic bearing series using the shear stiffness and damping of rubber, and the sliding bearing series using a friction damping between PTFE (Poly Tetra Fluor Ethylene) and a stainless plate and having a separate restoration device.

In the case of the elastic bearing series, there is a limitation in the appropriate temperature for use, and there is a problem in that the performance is not sufficient due to the change in the characteristics of the rubber in other temperature ranges.

In the case of the sliding bearing series, when the structure receives a lateral force, the ball supporting it moves freely between the concave sliding surfaces with frictional force, and the damage can be minimized by responding to the damping force by friction and the restoring force by the pendulum motion.

However, most of the seismic isolators have a limitation in that the seismic isolating performance is somewhat inferior because only vibration components in one direction, up and down or left and right, can be subjected to vibration isolation.

In particular, it is very important to minimize the friction coefficient on the contact surface for the sliding bearing series vibration isolator. Because it may vary depending on

As an example of such a sliding bearing series seismic isolator, Patent Document 1 discloses that a ball caster moves on a rolling plate coupled to the upper end of the coil spring to prevent damage to the structure or the ground when the ground is tilted, and also to dampen the vibration in the horizontal direction. 'Seismic support' is disclosed.

However, since it has a structure in which one coil spring is combined with one ball caster, structural stability is lowered when vibration occurs in the horizontal direction, so it is difficult to expect a smooth vibration damping effect.

That is, when the lower structure vibrates in the horizontal direction, there is a problem in that the ball caster cannot form a stable support force because it is a structure that moves on a rolling plate coupled to one coil spring.

In addition, in the method using one coil spring, damping is achieved only when the vibration generated in the horizontal direction is converted to the vertical direction. In order to do this, the spring constant and size must be quite large, so there is a limit in which it is difficult to miniaturize the device.

On the other hand, in Patent Document 2, developed and registered by the present inventor, a damper for seismic isolation in which the upper plate and the lower plate absorb the horizontal and vertical seismic motion by the cushioning action of the coil spring to damp the seismic energy transmitted to the switchgear. is disclosed.

However, this is because the upper plate is inclined to one side with respect to the lower plate, and when the coil spring supporting it is too twisted or bent, it is easily deformed and damaged, and the vibration transmitted to the switchboard is reduced over time. damping characteristic) is significantly lowered.

In addition, after inserting the socket into the cylinder, the joint pin is inserted in the state that the pin hole and the connection hole through both are aligned, and the snap rings are fastened to both ends of the joint pin one by one to prevent separation. There is a problem in that productivity is considerably lowered due to this complexity and complexity.

The background or prior art described herein is information possessed by the inventor or acquired in the process of deriving the present invention, and is only intended to help in understanding the technical meaning of the present invention, and prior to the filing of the present invention, the technology to which this invention belongs This does not mean that the technology is widely known in the field.

KR 10-1800871 B1 (2017.11.17) KR 10-2177483 B1 (2020.11.05) KR 10-2148133 B1 (2020.08.20)

Accordingly, the present inventor comprehensively considers all the above matters and at the same time absorbs roll vibration as well as horizontal and vertical vibrations caused by earthquakes or vibrations from the idea of solving the technical limitations and problems of the existing seismic isolation switchgear As a result, not only does the damping effect for vibration in any direction occur quickly, but the vibration damping property is maintained stably for a long time to improve seismic performance and durability, thereby reducing damage to various electric power facilities, and also reducing the friction coefficient between major components of the seismic isolator. The present invention was created as a result of continuous research with an effort to develop a seismic isolation switchgear of a new structure that can minimize and secure the effect of manufacturing and assembling.

Accordingly, it is an object and technical problem to be solved by the present invention to provide a seismic isolation type switchgear capable of stably maintaining vibration damping properties against vibration in any direction.

In addition, another technical problem and object to be solved by the present invention is to provide a seismic isolation type switchgear capable of minimizing the coefficient of friction between component parts and securing the ease of manufacturing and assembly.

Here, the technical problems and objects to be solved by the present invention are not limited to the technical problems and objectives mentioned above, and other technical problems and objects not mentioned will be clearly understood by those skilled in the art from the following description.

Specific means according to an aspect of the present invention for effectively achieving a specific technical purpose while embodying a new idea for solving the technical problem of the present invention as described above is for fixing to the lower part of the cabinet-shaped housing An upper plate having a fixing bolt coupled to the central portion, and having at least one first protrusion formed on both sides, respectively, disposed at regular intervals on the lower side of the upper plate, a bolt hole is formed in the central portion, and at least one or more first protrusions are formed on both sides, respectively. A low plate in which two protrusions are formed and a first ball seat is formed on an upper surface in all directions around the bolt hole, a plurality of ball studs coupled to the first ball seats of the low plate, coupled to the upper surface of the low plate A socket plate for freely moving by wrapping the lower part of the ball stud in a second ball seat, placed under the upper plate, and a cup portion for placing the rolling ball to rotate freely on the upper surface is formed, and a spring on the lower surface An upper supporter having an upper seat formed thereon and having screw holes communicating with the spring upper seat on both sides, placed on the socket plate with the upper part of the ball stud fitted in the middle, and the upper part is in contact with the spring upper seat of the upper supporter a plurality of first coil springs to elastically absorb vibrations in the vertical direction transmitted through the upper supporter, and the lower portion of the first coil spring is inserted while the upper portion is inserted in the upper seat of the spring of the upper supporter, the upper supporter a row supporter with slot grooves formed on both sides to communicate smoothly with the screw hole of the upper supporter, and to adjust the gap between the upper supporter and the row supporter A plurality of adjust bolts each fastened to the screw holes of the upper supporter, each having a holding pin integrally formed on one side, between the slot groove of the row supporter and the adjust bolt, before and after the upper supporter and the row supporter, and The left and right gaps are elastic by elasticity A plurality of second coil springs that elastically absorb horizontal vibrations transmitted through the upper supporter while maintaining the vertical position, are coupled to the upper surface of the socket plate, and control the front-back and left-right movements of the row supporters within a certain range. A plurality of stoppers limiting and covering the periphery of the upper plate and the lower plate, the upper plate at a position corresponding to the first protrusion, so that the upper plate can move in vertical and horizontal directions; Including a casing in which a first coupling hole is formed and a second coupling hole larger in size than the second protrusion is formed so that the low plate can move in the left and right directions at a position corresponding to the second protrusion A seismic isolation type switchgear is presented.

As a result, the present invention absorbs and dissipates not only horizontal and vertical earthquakes but also roll vibrations, so it is possible to not only attenuate the seismic energy transmitted to the enclosure, but also strengthen the seismic performance and durability to maintain stable vibration damping properties for a long time. It is possible to prevent the housing from being overturned by the behavior of the direction.

In a preferred embodiment of the present invention, a sliding curved surface is formed in a concave shape with a constant curvature on the lower surface of the upper plate in contact with the rolling ball, a friction material is attached to the sliding curved surface, and the upper surface of the upper plate A rubber bush that absorbs and disperses vibration, shock, and compressive load through an elastic action is mounted on the upper supporter, and between the rolling ball of the upper supporter and the cup part, when the rolling ball is rotated (turned), the slip is smoothed and frictional resistance and a plurality of slip balls that distribute the vertical and horizontal loads acting on the upper supporter are built in, so that pendulum motion occurs on the friction surface to increase the restoring force, and also to minimize the contact friction coefficient on the contact surface to increase the dynamic stability By maximizing the vibration energy offset, it is possible to improve the seismic isolation performance.

In addition, a preferred embodiment of the present invention provides a mounting groove formed on the lower surface of the upper plate in contact with the rolling ball of the upper supporter, an outer material attached to the mounting groove and formed of a ring having elasticity and a sector shape in cross section, and It has elasticity and is formed in a convex hemispherical shape with a central portion of a constant curvature toward the bottom so that the perimeter of the upper end is in contact with the upper periphery of the curved surface of the outer material. Further comprising an inner material attached to the mounting groove inside the outer material As it is constructed so that position movement in case of an earthquake occurs quickly and smoothly, the damping effect against vibrations in any direction is large, and the vibration damping performance is maintained for a long period of time. The damping force can effectively reduce the vibration transmission rate to the enclosure.

According to the technical idea and embodiment of the present invention, which is based on a unique solution to solve the above technical problems, when an earthquake occurs, it absorbs not only horizontal and vertical earthquake motion but also roll vibration through friction pendulum motion. Since that energy is dissipated, it is possible to effectively attenuate the seismic energy transmitted to the enclosure.

In addition, it effectively absorbs the compressive load (vertical load) of the enclosure and the shear load (horizontal load) according to the movement displacement such as bending that occurs simultaneously with the compression load (vertical load) while stably responding to the primary wave generated from any direction among seismic waves. By dissipating the energy and reducing the influence of the friction coefficient between the major components by the material, the operation is performed smoothly, so that dynamic stability is advantageous and the offset of minute high-frequency vibration energy can be maximized.

In addition, even if the upper plate is tilted to one side with respect to the lower plate, the ball stud moves in response naturally and prevents deformation and damage caused by excessive twisting or bending of the first coil spring. Vibration damping properties that effectively dampen vibration can be stably maintained for a long time.

Therefore, it prevents the housing from easily shaking or tilting due to external forces, earthquakes, and vibrations, and minimizes the moving distance to prevent internal wiring and grounding defects in the housing or damage and damage to various power control devices as well as conduction ( It can greatly improve seismic strength and seismic safety by preventing it from falling down) and the installation place (position).

Furthermore, manufacturing (processing) and assembling of major components is easy, thereby reducing manufacturing cost and improving productivity.

Here, the effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view showing main components constituting a seismic isolation type switchgear according to an embodiment of the present invention.
2 is an exploded perspective view showing some of the main components constituting the seismic isolation type switchgear according to the embodiment of the present invention.
3 is an exploded perspective view of the main components constituting the seismic isolation type switchgear according to the embodiment of the present invention, except for the casing.
4 is an enlarged longitudinal sectional view of main components constituting the seismic isolation type switchgear according to an embodiment of the present invention.
5 is an enlarged cross-sectional view of main components constituting a seismic isolation type switchgear according to an embodiment of the present invention.
6 is a cross-sectional view to help understand the operating state of the seismic isolation type switchgear according to an embodiment of the present invention.
7 is a longitudinal cross-sectional view showing an enlarged local part of the main components constituting the seismic isolation type switchgear according to another embodiment of the present invention.
8 is a longitudinal cross-sectional view showing an enlarged local part of the main components constituting the seismic isolation type switchgear according to another embodiment of the present invention.

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

Prior to this, the terms described below are defined in consideration of the functions in the present invention, which indicate that they should be interpreted as concepts consistent with the technical spirit of the present invention and meanings commonly or commonly recognized in the art.

In addition, when it is determined that a detailed description of a known function or configuration related to the present invention may obscure the gist of the present invention, the detailed description thereof will be omitted.

The accompanying drawings may be illustrated by exaggerating or simplifying a part for the convenience of explanation and understanding of the configuration and operation of the technology, and reveals that each component does not exactly match the actual size and shape.

In addition, in this specification, the term and/or is meant to include a combination of a plurality of related described items or any of a plurality of related described items, and when a part includes a certain component, it is a description that is specifically opposite This does not mean that other components are excluded, but other components can be further included.

That is, terms such as 'include' or 'have', 'have' as used in the present specification mean that a feature, number, step, operation, component, part, or combination thereof exists. However, it is to be understood that this does not exclude the possibility of addition or existence of one or more other features or number, step operation components, parts, or combinations thereof.

In addition, the meaning of the terms "unit" and "unit" means a module type that performs at least one function or a unit or role for processing a certain operation of the system, which is a combination of hardware or software or hardware and software It may be implemented as a device or assembly capable of performing an independent operation or a means through such a method.

And terms such as upper, lower, upper, lower, upper, lower, upper, lower, front and rear, left and right are used for convenience to distinguish relative positions of each component. For example, the upper side in the drawing may be named or referred to as the upper side and the lower side as the lower side, the longitudinal direction may be named or referred to as the front-back direction, and the width direction may be named or referred to as the left/right direction.

Also, terms such as first, second, etc. may be used to describe various components. That is, terms such as 1st, 2nd, etc. may be used only for the purpose of distinguishing one component from another component. For example, a first component may be referred to as a second component without departing from the protection scope of the present invention, and the second component may also be referred to as a first component.

As shown in FIGS. 1 to 6 , in the seismic isolation type switchgear according to an embodiment of the present invention, at least one or more various electrical distribution devices are mounted therein, and a cubicle-shaped enclosure (C) and this enclosure (C) It includes a seismic isolator (1) that is installed at the bottom of the to absorb earthquake energy by absorbing horizontal and vertical seismic movements as well as roll vibrations when an earthquake occurs.

In particular, the main components constituting the seismic isolator 1 are the upper plate 10, the low plate 20, the ball stud 30, the socket plate 40, the upper supporter 50, and the first coil spring 60. , a row supporter 70 , an adjust bolt 80 , a second coil spring 90 , a stopper 100 and a casing 110 .

Here, the ball stud 30, the upper supporter 50, the first coil spring 60, the low supporter 70, the adjust bolt 80, the second coil spring 90, and the stopper 100 are vertical and horizontal. It is arranged and isolated in four places between the upper plate 10 and the lower plate 20, respectively, so as to increase the vibration damping effect by dispersing the load.

On the other hand, the main components constituting the seismic isolator 1 are preferably manufactured using carbon steel (SS400), which is a structural rolled steel, as a main material.

The upper plate 10 is made in the shape of a rectangular metal plate having a certain length, width and thickness, and a fixing bolt 11 for fixing to the lower portion of the housing C is coupled to the central portion thereof, and front and rear both sides are respectively At least one first protrusion 12 for limiting displacement with respect to the casing 110 by being coupled to the first coupling hole 111 of the casing 110 is integrally formed.

Here, the fixing bolt 11 may be formed of a through bolt for the convenience of assembly, and it is preferable to form two first protrusions 12 on the front and rear surfaces respectively.

That is, the first protrusion 12 has a certain length, width, and thickness, and is inserted into the first coupling hole 111 of the casing 110 during assembly and is displaced in the vertical and horizontal directions to the enclosure C due to earthquakes, etc. When , the displacement is limited by contact interference with the first coupling hole 111 .

And a sliding curved surface 13 concave with a constant curvature may be formed on a portion of the lower surface of the upper plate 10 that is in contact with the rolling ball 51 of the upper supporter 50, and the sliding curved surface 13 has A friction material 14 for lowering the contact friction coefficient may be attached.

Here, the sliding curved surface 13 is formed in all directions with the fixing bolt 11 as the center, and the respective curvature radii are the same, and the larger the size, the better the seismic isolation performance.

In addition, the friction material 14 is made of PTFE (Poly Tetra Fluor Ethylene), which has a small friction coefficient and excellent heat resistance, corrosion resistance, and chemical resistance, as a basic material, and uses a composite material mixed with carbon, glass fiber, copper, etc. It may be made of a synthetic resin of

On the other hand, the friction material 14 has a disadvantage in that it is difficult to use it for a long time due to large wear when the stress is changed within the normal stress limit.

Accordingly, by embedding neodymium permanent magnets (not shown) having the same poles in the sliding surface 13 and the rolling ball 51 , the repulsive force of magnetic force acts on the friction surface, thereby reducing the contact friction coefficient.

That is, the repulsive force by the magnetic force acts as a force to lift the upper plate 10 and reduces the vertical force affecting the frictional force, thereby reducing the friction coefficient due to the contact between the sliding curved surface 13 and the rolling ball 51 by about 20%. can be reduced

And, on the upper surface of the upper plate 10, a rubber bush 15 that is stably inserted into the coupling hole of the housing C by an elastic action, and absorbs and disperses vibration, shock, and compressive load is mounted.

That is, the rubber bush 15 serves to alleviate vibration or noise caused by vibration transmitted to the housing C, and to attenuate natural frequencies generated by earthquakes or vibrations.

Here, the rubber bush 15 prevents lifting or slipping of the housing (C), and secures buffering and supporting power at the same time, as well as elastic materials such as polyurethane and rubber to more efficiently absorb compressive and shear loads. It is preferable to form it with a high elasticity and high elasticity material in which an iron plate or lead is inserted into the material or compressed rubber.

The low plate 20 is formed in the shape of a rectangular metal plate having a predetermined length, width, and thickness, and is disposed below the upper plate 10 at regular intervals.

And a bolt hole 21 is formed in the center of the low plate 20 to fix it with a bolt to the foundation on the ground, and on both front and rear sides, it is coupled to the second coupling hole 112 of the casing 110 and the casing At least one second protrusion 22 for limiting displacement with respect to 110 is integrally formed.

In addition, in the upper surface of the low plate 20, the first ball seat 23 in the shape of a hemispherical concave recessed shape is formed in four places around the bolt hole 21 in four places to couple the ball stud 30. .

Here, it is preferable that the bolt hole 21 is formed in the form of a screw hole in which a female thread is cut for direct screw coupling with an anchor bolt or a through bolt, and two second protrusions 22 are formed on the front and rear surfaces, respectively.

The ball studs 30 are respectively coupled to the first ball seats 23 of the low plate 20 to provide an elastic action and direction of the first coil spring 60 .

And the ball stud 30 is a ball portion integrally formed at the lower end of the steel rod (rod), the first ball seat 23 of the low plate 20 and the second ball seat 42 of the socket plate 40 It is mounted to rotate freely within the

That is, the ball stud 30 rotates about its axis when vibration occurs and pivots between the first ball seat 23 and the second ball seat 42 to form the first coil spring 60 and the row supporter 70. It acts to make the deformation and displacement more natural and smooth, and gives dynamic stability to restore the original stable posture when the postures of the first coil spring 60 and the row supporter 70 change.

In addition, the ball stud 30 can reduce the vibration duration by resiliently dispersing and dissipating the stress concentrated on the first coil spring 60 .

The socket plate 40 is coupled to the upper surface of the low plate 20 in order to wrap the lower part of the ball stud 30 in the first ball seat 23 of the low plate 20 to move freely.

That is, the socket plate 40 is formed in the shape of a rectangular metal plate having a certain length, width and thickness, and a through hole 41 communicating with the bolt hole 21 of the low plate 20 is formed in the center thereof, A second ball seat 42 for wrapping and coupling the ball stud 30 between the first ball seats 23 of the low plate 20 is formed in four places around the through hole 41 on the lower surface. there is.

The upper supporter 50 is mounted below the upper plate 10 so as to move up and down along the row supporter 70 while being placed on the first coil spring 60, respectively, and the rolling ball 51 is accommodated on the upper surface and A cup portion 52 for placing (safely installed) to rotate 360 degrees freely is recessed to a certain depth.

And, in the center of the lower surface of the upper supporter 50, a spring upper sheet 53 is formed to hold the upper part of the first coil spring 60 as if wrapped around it in order to prevent sliding of the first coil spring 60 generated during the horizontal displacement process.

Further, on both sides of the upper supporter 50, screw holes 54 communicating with the spring upper sheet 53 on the left and right are formed.

That is, the first coil spring 60 and the upper portion of the row supporter 70 are inserted into the spring upper seat 53 of the upper supporter 50 and are coupled to each other.

Here, the rolling ball 51 preferably employs a steel ball (steel ball) whose surface is polished to minimize the friction coefficient.

In addition, it is preferable to apply a lubricant to the inside of the cup part 52 to reduce friction of the rolling ball 51 to smooth the rotation, to prevent wear or corrosion, and to remove noise.

On the other hand, between the rolling ball 51 and the cup part 52 of the upper supporter 50, when the rolling ball 51 rotates (turns), it smoothly slips and reduces frictional resistance, and the upper supporter 60 A plurality of slip balls 55 for dispersing the acting vertical and horizontal loads may be built-in.

That is, the slip ball 55 distributes the rolling load and vertical load acting on the rolling ball 51 , and allows the rolling ball 51 to naturally return to the center of the upper supporter 50 , and also the upper supporter 50 . It serves to smoothly guide the free rotation and rolling motion of the rolling ball 51 about the axis of the

The first coil spring 60 is a socket plate 40 with its upper portion in contact with the spring upper seat 53 of the upper supporter 50 in order to elastically absorb the vibration in the vertical direction transmitted through the upper supporter 50 . placed on top

And the first coil spring 60 is provided to resist the compressive force while the movement is limited by the ball stud 30 fitted thereunder.

That is, the first coil spring 60 maintains the upper and lower spacing between the upper supporter 50 and the lower supporter 70 by elasticity, and also elastically supports and supports the compressive load of the housing C, and is constant in the horizontal direction. Allows displacement, absorbs and relieves vibration and impact force while elastically deforming in response to external force, and distributes seismic force to minimize the direct transmission of vibration to the housing (C). It is in contact with the seat 53 , and the lower end is in contact with the socket plate 40 .

Here, the first coil spring 60 is made of a compression coil spring having a square cross section in order to provide a force that resists the applied load, and is preferably inserted into the upper supporter 50 and the socket plate 40 in a compressed state. , it is not limited thereto, and any one having the same action and effect may be used.

In addition, it is preferable to use the initial spring constant (k) of the first coil spring 60 is 25N/mm to 75N/mm.

For example, by using an excellent material such as SAE9254, it can withstand high stress, high-speed amplitude, and heat resistance, and by adopting a so-called die spring, which has high structural stability with high rigidity and high modulus of elasticity by LP treatment of SWRS wire, It can sufficiently support the high-load enclosure (C), and the possibility of breakage is low, and when an earthquake occurs, high stress can be sufficiently absorbed and relieved to block or reduce transmission to the enclosure (C).

The row supporter 70 is mounted with limited movement by the stopper 100 in order to act as a pendulum while guiding the upper supporter 50 to move up and down smoothly due to the elastic action of the first coil spring 60 .

That is, the outer diameter of the low supporter 70 is such that the upper part is inserted into the spring upper sheet 53 of the upper supporter 50 and surrounds the lower part of the first coil spring 60, the spring upper sheet ( 53) is formed to be slightly smaller than the inner diameter, and the inner diameter is formed to be slightly larger than the diameter of the first coil spring (60).

And slot grooves 71 communicating with the screw holes 54 of the upper supporter 50 are formed on both left and right sides of the row supporter 70 .

Here, the slot groove 71 is a long hole in the vertical direction so that the upper supporter 50 moves up and down within a certain displacement with respect to the lower supporter 70 , that is, to guide the vertical movement of the second coil spring 90 . ) is preferably formed in a shape.

The adjust bolt 80 adjusts the gap between the upper supporter 60 and the row supporter 70 by adjusting the tension of the second coil spring 90, and supports the elastic action of the second coil spring 90 and They are fastened to the screw holes 54 of the upper supporter 60 by screwing, respectively, in order to provide direction.

And on one side of the adjust bolt 80 facing the row supporter 70, a holding pin 81 for holding the second coil spring 90 so as not to fall out is integrally formed.

That is, the adjust bolt 80 can adjust the tension of the second coil spring 90 by changing the screw hole 54 and the fastening position of the upper supporter 60 according to various variables such as the weight of the housing C. Through this, the gap between the upper supporter 60 and the row supporter 70 can be adjusted, and the load (fastening tension) applied to the second coil spring 90 and the strength of absorbing vibration can be arbitrarily set.

The second coil spring 90 elastically maintains the distance between the front and rear and left and right sides of the upper supporter 60 and the row supporter 70 by elasticity, while elastically absorbing the vibration in the horizontal direction transmitted through the upper supporter 50. It is mounted between the slot groove 71 and the adjust bolt 80 of the row supporter 70 for this purpose.

That is, the second coil spring 90 limits the displacement in the vertical and horizontal directions that occur in the housing C due to its elastic action, so that the upper supporter 60 and the row supporter 70 are not separated or separated and are in a solidly coupled state. can keep

Here, the second coil spring 90 is made of a compression coil spring having a square cross section in order to provide a force that resists the applied load, and is inserted between the low supporter 70 and the adjust bolt 80 in a compressed state. Preferably, it is not limited thereto, and any one having the same effect may be used.

For example, by using excellent materials such as SAE9254, it can withstand high stress, high-speed amplitude, and heat resistance, and the SWRS wire rod is LP-treated to have high structural stability with high rigidity and high modulus of elasticity, and the thickness of the first coil spring (60) and A die spring having a thickness and diameter smaller than the diameter may be employed.

A plurality of stoppers 100 are coupled to the upper surface of the socket plate 40 in order to limit the movement of the row supporters 70 in the front and rear and left and right directions within a certain range.

Here, it goes without saying that the stopper 100 may be used for fixing the socket plate 40 to the low plate 20 by being made of a fastening bolt.

The casing 110 covers the four perimeters of the upper plate 10 and the low plate 20, and is formed to accommodate the upper supporter 50 and the low supporter 70 therein, and a first protrusion ( 12), a plurality of first coupling holes 111 into which the first protrusion 12 is fitted are formed at regular intervals from side to side at a position corresponding to 12), and at a position corresponding to the lower second protrusion 22 A plurality of second coupling holes 112 into which the second protrusions 22 are fitted are formed at regular intervals from left to right.

And the first coupling hole 111 is formed to be slightly larger in size than the left and right width and vertical height of the first protrusion 12 so that the upper plate 10 can move in the up, down, left, and right directions.

In addition, the size of the second coupling hole 112 is slightly larger than the left and right width of the second protrusion 22 so that the low plate 20 can move in the left and right directions.

In addition, the size of the front and rear and left and right widths of the inner space of the casing 110 are slightly larger than the front and rear and left and right widths of the upper plate 10 and the lower plate 20 .

Here, the first coupling hole 111 is preferably formed so that the movable range of the upper plate 10 is determined within 5 mm in the vertical direction.

On the other hand, the casing 110 may be provided in a symmetrically bisected form about the axis of the fixing bolt 11 in order to improve assembling, and in this case, one casing and the other casing are integrally fixed. In order to maintain the grooves and protrusions that are coupled by an interference fit method to correspond to the edges of the surfaces facing each other, they may be assembled by welding or a bolting method using bolts and nuts.

<Operation and principle of operation>

The main operation and operating principle of the seismic isolator 1 constituting the seismic isolating switchgear according to the embodiment of the present invention configured as described above will be described as follows.

First, an anchor bolt embedded in the foundation on the ground is inserted into the bolt hole 21 of the low plate 20, and then fixed by tightening with a nut, etc., and the upper plate 10 is a hole formed in the lower part of the housing (C). After inserting the fixing bolt 11, it can be fixed by tightening it with a nut.

In this state, when a compressive load (vertical load) occurs due to earthquake or vibration, etc., the remaining components move organically except for the low plate 20, and in this process, the first and second coil springs 60 and 90 Vibration and load transmitted to the housing (C) can be naturally distributed and absorbed or damped by this contraction and extension action.

In addition, when a vertical load and a horizontal load occur at the same time, the first and second coil springs 60, 90, etc. absorb or attenuate the vibration while moving from the original position as much as the vertical and horizontal movements and displacements, thereby reducing the dispersion effect of vibration. can be raised

In other words, when an earthquake occurs, it effectively absorbs both horizontal and vertical earthquake motion as well as roll vibration at the same time and dissipates the energy. It is possible to greatly improve seismic strength and seismic safety, such as preventing

On the other hand, as shown in FIG. 6 , when the foundation is tilted due to an earthquake, and horizontal load and rolling occur, the casing 110 moves up, down, left and right, and several parts that are in contact with the sliding curved surface 13 of the upper plate 10 The rolling ball 51 of the dog makes a sliding pendulum motion around the fixing bolt 11 .

At this time, since the rolling ball 51 moves along the sliding curved surface 13, the housing C supported by the rolling ball 51 is lifted upward and behaves like a pendulum having a radius R.

In this case, intrinsic restoring force by the radius of curvature of the sliding curved surface 13 and damping force by friction occur, and at the same time, the first and second coil springs 60 and 90 according to the vertical movement of several upper supporters 50 at the same time. The upper plate 10 maintains a horizontal state by distributing vibration and load by the contraction and extension action of the upper plate 10 and can stably support and protect the housing C by absorbing or damping it.

That is, when the seismic force is greater than the static friction force, organic operation and action such as movement (displacement) of several upper supporters 50 and row supporters 70 and elastic action of the first and second coil springs 60 and 90 Therefore, it is possible to stably respond to longitudinal waves generated from any and all directions among seismic waves.

In addition, because it effectively absorbs compressive load (vertical load) and shear load (horizontal load) at the same time and dissipates the energy through pendulum motion on the friction surface of the rolling ball 51 and the upper plate 10, the enclosure in case of an earthquake (C) It is possible to greatly improve the seismic isolation force and safety of seismic isolation, such as preventing damage and damage to various internal power control devices as it easily shakes or tilts.

Moreover, even if any one of the upper supporters 50 receives an unbalanced load from the housing C, the elastic action of the second coil spring 90 and the support of the row supporter 70 excessively in any one direction in the horizontal direction Since it does not move, the vibration duration can be reduced and the dispersion effect of vibration can be increased.

That is, the tension of the second coil spring 90 can be adjusted by changing the position of the adjust bolt 80 according to the unbalanced load of the housing C, and through this, the distance between the upper supporter 50 and the row supporter 70 is reduced. It can be finely adjusted to prevent the upper supporter 50 from operating by being too tilted to either side with respect to the row supporter 70 and the ball stud 30 .

In addition, the upper supporter 50 absorbs vibration energy and converts it into other energy while limiting the displacement by the interference with the second coil spring 90 and the row supporter 70 in the process of ascending and descending the upper supporter 50 to alleviate the magnitude of the vibration And by reducing the strength, when the enclosure (C) is twisted in the horizontal direction by external factors such as earthquakes or vibrations, the distortion is minimized as well as quickly returning and restoring to the original state, and vibration is applied to the enclosure (C). It can be prevented from being tilted to either side and safely restored to its original state.

In addition, since the ball part of the ball stud 30 can freely rotate with a spherical free contact within the first ball seat 23 of the raw plate 20 and the second ball seat 42 of the socket plate 40 . When vibration occurs, it acts as a joint that rotates and turns around its axis to always maintain a vertically erected state, which makes the deformation and displacement of the first coil spring 60 and the row supporter 70 more natural and smooth. can be done

Meanwhile, as shown in FIG. 7 , the upper plate 10 of the main components of the seismic isolator 1 constituting the seismic isolating switchgear according to another embodiment of the present invention includes a mounting groove 17 and an external material 18. And it further includes an inner material (18).

The mounting groove 17 is formed in a circular shape on the lower surface of the upper plate 10 in contact with the rolling ball 51 of the upper supporter 50 .

The outer member 18 has elasticity in order to induce the inner member 18 to quickly return to the center of the upper supporter 50 when the horizontal vibration disappears, and is formed of a sector-shaped ring in cross-section. It is attached between the circumference and the mounting groove (17).

That is, the outer material 18 has a sector-shaped cross section and is fitted into the mounting groove 33 of the upper plate 10 so that the curved surface is exposed.

And the upper periphery of the curved surface of the outer member 18 is in contact with the upper periphery of the inner member 19 .

Here, the outer material 18 has an elastic modulus that can be deformed up to an allowable displacement in order to provide a force that resists an applied load, and is formed of a synthetic rubber material having excellent weather resistance, bending resistance, abrasion resistance, impact resistance, etc. It is preferable, but it is not limited thereto, and any one may be used as long as it has the same action and effect.

For example, the outer material 18 absorbs and disperses vibration or impact force more effectively and more stably responds to the displacement of the upper plate 10. An ester-based material having a shore hardness A95 excellent in shock mitigation and recovery after tension. It can be formed of polyurethane, compressed rubber, or a high-elasticity and high-stretch material in which an iron plate or lead is inserted into the compressed rubber.

The inner member 19 minimizes the distortion when the upper plate 10 is twisted in the horizontal direction due to external factors such as earthquake or vibration, as well as quickly returning and restoring it to its original state, and vibration in the housing (C) It has an elastic restoring force in order to prevent it from being drawn to either side when applied and to restore it to its original state. ) is attached and fixed in the mounting groove 17 inside the outer material 18 so as to come into contact with the upper periphery of the curved surface.

That is, the inner member 19 is formed in a shape in which the lower surface of the inner member 19 is in contact with the rolling ball 51 by a point or a surface is rounded toward the rolling ball 51 side.

Here, the inner member 19 elastically supports and supports the compressive load of the housing (C), allows a certain displacement in the horizontal direction, and absorbs vibration energy and impact force while elastically deforming in response to external forces such as shear load and horizontal load And to dissipate, it may be made of a material that minimizes the vibration from being directly transmitted to the housing (C).

That is, the inner material 19 has an elastic modulus that can be deformed up to an allowable displacement in order to provide a force that resists an applied load, and is formed of a synthetic rubber material having excellent weather resistance, bending resistance, abrasion resistance, impact resistance, etc. It is preferable to do, but it is not limited thereto, and if it has the same action and effect, any one may be used.

For example, the inner material 19 absorbs and disperses vibration or impact force more effectively and more stably to respond to the displacement of the upper plate 10. Ester-based poly having excellent shock mitigation and recovery properties after tension A95. It can be formed of urethane, compressed rubber, or a high-elasticity and high-stretch material in which an iron plate or lead is inserted into the compressed rubber.

Here, among the components related to the seismic isolator 1 constituting the seismic isolating switchgear according to another embodiment of the present invention, the same reference numerals are used for components having the same or similar operational effects as those of the above-described embodiment, and the repetition thereof A detailed description will be omitted.

The seismic isolation type switchgear according to another embodiment of the present invention configured as described above increases the cross-sectional secondary moment of the force acting in the longitudinal direction of the upper plate 10 by the action of the inner member 19 when vibration or earthquake occurs. By sufficiently withstanding the horizontal pressure and lateral load, the direct transmission of vibrations caused by earthquakes to the enclosure (C) is suppressed and minimized, thereby preventing the enclosure (C) from being easily shaken by seismic waves or tilted to either side. there is.

That is, when the vibration in the horizontal direction occurs, the hemispherical end surfaces of the rolling ball 51 and the inner member 19 in contact with each other can be displaced while sliding with each other without significant resistance, so that the elasticity in the horizontal direction can be improved.

And when the upper circumference of the inner member 19 and the upper circumference of the curved surface of the outer material 19 are pressed together by vibration in the horizontal direction, they repel each other by their respective elastic restoring forces. Since the upper end of the member 19 can be quickly returned to its original position, elasticity in the horizontal direction can be improved.

Therefore, it naturally attenuates displacement caused by external forces such as general shock or vibration by the elastic action of the inner member 19 and the outer member 18, as well as effectively responds to primary waves generated from any direction among seismic waves. As it has a stable operation direction, it more effectively absorbs the compressive load (vertical load) of the enclosure (C) and the shear load (horizontal load) caused by movement displacement such as bending at the same time to maximize seismic performance and increase seismic safety can do it

On the other hand, as shown in FIG. 8 , among the main components of the seismic isolator 1 constituting the seismic isolating switchgear according to another embodiment of the present invention, the upper supporter 50 has a cup part 52 and a spring upper seat 53 . ) is drilled through the fastening hole 56, and the fastening hole 56 smooths the slip during rotation (turning) of the rolling ball 51 and reduces frictional resistance, and A ball plunger 57 that relieves and absorbs vibration and shock acting by the elastic force of the spring is fastened thereto.

That is, when an earthquake occurs, in the course of the rolling balls 51 operating, the movement speed changes by itself due to the elastic action of the ball plunger 57 and absorbs vibrations, so it responds naturally to any direction such as horizontal and vertical vibrations. Thus, the energy can be flexibly dispersed and dissipated.

Therefore, it is possible to maximize the damping capacity to more effectively absorb the compression load (vertical load) of the enclosure (C) and the shear load (horizontal load) and vibration caused by movement displacement such as bending that occurs simultaneously and dissipate it as heat. there is.

Here, among the components related to the seismic isolator 1 constituting the seismic isolating switchgear according to another embodiment of the present invention, the same reference numerals are used for components having the same or similar effects as those of the above-described embodiment, and the A repetitive and detailed description will be omitted.

On the other hand, the present invention is not limited by the above-described embodiment and the accompanying drawings, and can be variously modified and applied in various ways not illustrated within the scope without departing from the technical spirit of the present invention, as well as each It is clear to those of ordinary skill in the art to which the present invention pertains that it can be widely applied by changing the component substitution and other equivalent embodiments.

Therefore, the contents related to the modification and application of the technical features of the present invention should be interpreted as being included within the technical spirit and scope of the present invention.

10: upper plate 11: fixing bolt
12: first protrusion 13: sliding curved surface
14: friction material 15: rubber bush
17: mounting groove 18: external material
19: inner material 20: low plate
21: bolt hole 22: second protrusion
23: first ball seat 30: ball stud
40: socket plate 41: through hole
42: second ball seat 50: upper supporter
51: rolling ball 52: cup part
53: spring upper seat 54: screw hole
55: slip ball 56: fastening hole
57: ball plunger 60: first coil spring
70: low supporter 71: slot home
80: adjust bolt 81: holding pin
90: second coil spring 100: stopper
110: casing C: enclosure

Claims (3)

an upper plate (10) having a fixing bolt (11) coupled to the center of the cabinet-shaped housing (C) for fixing to the lower part;
At least one first protrusion 12 formed on both sides of the upper plate 10, respectively;
a low plate 20 disposed on the lower side of the upper plate 10 at regular intervals and having at least one second protrusion 22 formed on both sides thereof;
a bolt hole 21 formed in the center of the low plate 20;
a first ball seat 23 concavely indented in the upper surfaces of the four sides with the bolt hole 21 as the center among the upper surfaces of the low plate 20;
a plurality of ball studs (30) coupled to the first ball seat (23) of the low plate (20);
a socket plate 40 fixed to the upper surface of the low plate 20 and wrapping the lower part of the ball stud 30 in the second ball seat 42 to move freely;
The upper supporter 50, which is placed under the upper plate 10, has a cup part 52 for receiving and seating the rolling ball 51 to freely rotate on its upper surface, and having a spring upper seat 53 on its lower surface. );
screw holes 54 formed on both sides of the upper supporter 50 to communicate with the spring upper sheet 53;
The upper part of the ball stud 30 is placed on the socket plate 40 while being fitted in the middle, and the upper part is in contact with the spring upper seat 53 of the upper supporter 50 through the upper supporter 50 . A plurality of first coil springs 60 to elastically absorb the transmitted vibration in the vertical direction;
The lower part of the first coil spring 60 is inserted while the upper part is inserted into the spring upper seat 53 of the upper supporter 50 so that the upper supporter 50 acts as an elastic action of the first coil spring 60 . a row supporter 70 for guiding it to move up and down smoothly;
slot grooves 71 formed on both sides of the row supporter 70 to communicate with the screw holes 54 of the upper supporter 50;
In order to adjust the gap between the upper supporter 50 and the row supporter 70, they are respectively screwed into the screw holes 54 of the upper supporter 50, and a holding pin 81 on one side is integrally formed. A plurality of adjust bolts (80) formed;
Between the slot groove 71 of the row supporter 70 and the adjust bolt 80, the front and rear and left and right intervals between the upper supporter 50 and the row supporter 70 are elastically maintained by elasticity, while the upper a plurality of second coil springs 90 that elastically absorb vibrations in the horizontal direction transmitted through the supporter 50;
a plurality of stoppers (100) coupled to the upper surface of the socket plate (40) and limiting movement of the row supporters (70) in front, rear and left and right directions within a predetermined range;
a casing 110 formed to cover the circumference of the upper plate 10 and the lower plate 20;
A first coupling hole 111 formed larger than the first protrusion 12 so that the upper plate 10 can move up and down and left and right at a position corresponding to the first protrusion 12 of the casing 110 . ); and
a second coupling hole 112 formed larger than the second protrusion 22 at a position corresponding to the second protrusion 22 of the casing 110 so that the low plate 20 can move in the left and right directions;
Seismic isolation type switchgear including
According to claim 1,
A sliding curved surface 13 is formed on the lower surface of the upper plate 10 in contact with the rolling ball 51 of the upper supporter 50 in the form of a concave recess with a constant curvature,
A friction material 14 is attached to the sliding curved surface 13,
A rubber bush 15 is mounted on the upper surface of the upper plate 10 to absorb and disperse vibrations, shocks, and compressive loads by an elastic action,
When the rolling ball 51 rotates (turns) between the rolling ball 51 and the cup part 52 of the upper supporter 50, it smoothes the slip and reduces frictional resistance, and the upper supporter 50 A seismic isolation type switchgear with a number of slip balls (55) to distribute the vertical and horizontal loads acting on the
According to claim 1,
a mounting groove 17 formed on a lower surface of the upper plate 10 in contact with the rolling ball 51 of the upper supporter 50;
an outer member (18) attached to the mounting groove (17) and formed in a ring having elasticity and having a sector-shaped cross section; and
It is attached in the mounting groove 17 inside the outer material 18, has elasticity and is formed in a convex hemispherical shape with a constant curvature in the middle part downwards, so that the periphery of the upper end is the upper end of the curved surface of the outer material 18. an inner member 19 disposed in contact with the periphery;
Seismic isolation type switchgear further comprising a.

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