KR102305497B1 - Earthquake-resistant and vibration isolation apparatus for switchgear - Google Patents

Abstract

The present invention relates to an earthquake-proof and seismic isolation device for a switchgear. According to the present invention, a plurality of ball bearings (44) are arranged on a surface of a mount member (14) of an accommodation container body (10), and a vibration-proof spring (30) is seated on a sliding plate member (46) in a state that the sliding plate member (46) horizontally moved in a seismic isolation range allowed by the accommodation container body (10) is placed on the ball bearings (44). Also, a piston member (32) formed with a seismic isolation tolerance shaft hole (34) having tolerance for allowing a horizontal movement for seismic isolation is placed on an upper free end of the vibration-proof spring (30) accommodated in an inner chamber of the accommodation container body (10), and protrudes upward through an upper opening (18) of the accommodation container body (10), and the piston member (32) fitted to a vibration-proof damping tubular body (38) can be relatively vertically and horizontally moved with respect to the accommodation container body (10). Accordingly, a spring pressure adjustment bolt (40) for limiting an operating distance of the piston member (32) and controlling a pressure of the vibration-proof spring (30) passes through the seismic isolation tolerance shaft hole (34) of the piston member (32), and is fastened with a screw tap hole (20) of the mount member (14) of the accommodation container body (10) by a bolt. Therefore, the usability and stability of the switchgear even in the occurrence of an earthquake can be maintained.

Description

Seismic resistance and seismic isolator for switchgear {EARTHQUAKE-RESISTANT AND VIBRATION ISOLATION APPARATUS FOR SWITCHGEAR}

The present invention relates to seismic and seismic isolating equipment, and more particularly, to a seismic and seismic isolator for switchgear that prevents seismic force itself from being transmitted to a switchgear structure so that usability and stability of the switchgear can be maintained even when an earthquake occurs.

In general, a switchgear is a device used for monitoring, control, and protection of a power system, and refers to an assembly of unit devices, supporting structures, and wires connecting them. The power reception panel includes the control panel that can receive power from KEPCO or can operate the facilities. And the switchboard is equipped with a built-in facility that distributes electric power to the intended use or has panels for controlling the facility.

Most of the general consumers have a switchboard, and examples of the switchboard include a high-voltage closed switchboard, a high-voltage switchboard, a low-voltage switchboard, a switchboard for subways, a switchboard for a water purification plant, a motor control center, a bus duct system, and the like.

The switchgear has a cubicle-type enclosure in the form of an exterior, and the inside is a high-voltage switchgear, an instrument current transformer, a high-voltage circuit breaker, a transformer, a low-voltage distribution circuit breaker, a magnet, etc. and a control panel on which electrical components and the like are mounted.

In addition to power devices, busbars connecting power devices according to the power system and wiring for measurement and monitoring of power devices are arranged inside the enclosure, and the enclosure and its internal control panel are installed on a safe concrete floor. On the concrete floor where the enclosure is to be mounted, wiring workers are formed for monitoring wiring between power devices and wiring for load facilities.

When external vibrations or shocks due to factors such as tectonic fluctuations or explosions are applied to the switchboard, the power equipment inside the control panel and electrical components such as wiring and protection relays interconnecting the power equipment may be damaged or damaged. Failure to do so may cause power supply interruption or fire.

Due to natural disasters such as earthquakes, typhoons, and tsunamis, which are becoming more frequent these days, structural collapse accidents and economic losses are increasing. In case of destruction of large buildings such as high-rise buildings or high-rise buildings, as well as power distribution boards installed in various structures, it can lead to enormous human casualties, economic loss, and inoperability of various devices due to power supply interruption. This is being strengthened.

If a building, facility, or structure is designed for seismic resistance, even if the building withstands the horizontal force caused by an earthquake, there may be casualties due to overturning or damage to furniture and equipment inside the building and the amplified acceleration within the building. will be.

On the other hand, in the case of a seismic isolation system in which a seismic isolator is installed in a building, facility, or structure, the seismic force itself is not transmitted to the structure, so the usability and stability of the structure can be maintained even when an earthquake occurs.

Therefore, if a seismic isolator that prevents or minimizes the seismic force itself from being transmitted to the switchgear housing is devised, it will receive great response from the people involved.

Registered Patent No. 10-1232336 "Vibrating pad for switchgear and lower structure of switchgear comprising the vibration pad" Registered Patent No. 10-1418247 "Seismic device for switchboard"

Accordingly, an object of the present invention is to provide an earthquake-resistant and seismic isolator for a switchgear that prevents seismic force itself from being transmitted to a switchgear structure, thereby maintaining the usability and stability of the switchgear even when an earthquake occurs.

The present invention according to the above object, in the seismic and seismic isolator for switchgear, arranges a plurality of ball bearings 44 on the surface of the mount member 14 of the housing 10, and the housing 14 on the ball bearings 44 The anti-vibration spring 30 is configured to be seated on the sliding plate member 46 in a state where the sliding plate member 46 capable of horizontal movement within the vibration isolation range allowed by the On the free end of the upper side of the spring 30, a piston member 32 having a vacuum isolation shaft hole 34 having a tolerance for allowing horizontal movement for vibration isolation is placed, and upward through the upper opening 18 of the housing body 10. It is configured to protrude, but the piston member 32 into which the vibration damping tube body 38 is inserted is configured to allow up, down, left and right flow operation relative to the housing body 10, limiting the working distance of the piston member 32 and preventing vibration The spring pressure adjusting bolt 40 for adjusting the pressure of the spring 30 penetrates the surface vacuum difference shaft hole 34 of the piston member 32 to the screw tap hole 20 of the mount member 14 of the housing body 10. It is characterized in that it is configured to be bolted.

In addition, in the seismic and seismic isolator (2) for switchgear of the present invention, the mount member (14) has a circular area receiving groove (24) for accommodating the horizontal sliding movement of the sliding plate member (46) for allowing the seismic isolation range, , It is characterized in that the circular area receiving groove 24 is configured such that a plurality of ball bearing receiving grooves 48 are formed so that the ball bearings 44 are concentrically arranged in a fixed position.

The present invention is an earthquake-resistant and seismic isolator for a switchgear, and has the advantage of maintaining the usability and stability of the switchgear even in the event of an earthquake by preventing the seismic force itself from being transmitted to the switchgear housing.

1 is a perspective configuration diagram of an earthquake-resistant and seismic isolator for a switchboard according to an embodiment of the present invention;
2 is a separate cross-sectional configuration view of the seismic resistance and seismic isolator for the switchgear of FIG. 1;
3 is a schematic installation configuration diagram of a switchboard equipped with an earthquake-proof and seismic isolator for a switchboard according to the present invention;
4 is a front cross-sectional view of the lower side of the switchboard equipped with the seismic resistance and seismic isolator for the switchboard of the present invention in FIG. 3;
5 is a combined enlarged view of the seismic resistance and seismic isolator for a switchgear of the present invention shown in FIG. 4;
6 is a waveform diagram showing seismic waves that adversely affect the switchgear when an earthquake occurs.

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

1 is a perspective configuration diagram of an earthquake-proof and seismic isolator 2 for a switchgear according to an embodiment of the present invention, and FIG. 3 is a schematic installation configuration diagram of a switchboard equipped with an earthquake-proof and seismic isolator 2 for a switchboard according to the present invention, and FIG. (54) is a front cross-sectional view of the lower side.

5 is an enlarged view of the earthquake-proof and seismic isolator 2 for a switchgear shown in FIG. 4 .

The seismic and seismic isolator 2 for switchgear according to the embodiment of the present invention has a very simple structure and durability, can effectively protect the switchgear even from up and down or left and right vibrations caused by earthquakes or external shocks, and has excellent ease of use and transport In addition to excellent durability when moving or moving, the seismic isolation structure is further reinforced to separate the switchgear housing from the rocking ground even when an earthquake occurs, so that the switchgear's usability and stability can be maintained as it is.

Seismic isolation (免震) is a technology to prepare for earthquakes by separating or gently absorbing seismic vibration transmission from the ground to lower vibration transmission to a structure (in the present invention, the switchgear housing).

By installing the seismic and seismic isolator 2 for switchgear according to the present invention between the switchgear housing 54 and the ground, the ground and the switchgear housing 54 are separated (Base isolation) to artificially lengthen the natural cycle of the building when an earthquake occurs. It prevents earthquakes from resonating with the structure so that the seismic force is relatively weakly transmitted to the structure.

6 is a waveform diagram showing seismic waves that adversely affect the switchgear when an earthquake occurs, and there are S-waves 70 and L-waves 72 . The S wave 70 is a transverse wave and the L wave 72 is a surface wave.

The amplitude of the S wave 70 is larger than the P wave (longitudinal wave) and smaller than the L wave 72, as shown in FIG. 6, and the degree of damage is the L wave 72 the largest and the S wave 70 next as large

The concept of seismic isolation is to achieve seismic isolation, ground separation, and foundation separation from the S-wave 70 and L-wave 72, which have ripple power in amplitude and degree of damage among seismic waves. In the invention, it is to structurally isolate it so that it is not transmitted to the switchgear housing).

When comparing the case of structures without earthquake-resistant construction and structures with earthquake-resistant construction, the structures without earthquake-resistant construction cause enormous damage when seismic force is transmitted as shown in FIG. Buildings have the advantage of being able to withstand horizontal forces caused by earthquakes. However, earthquake-resistant structures may cause a greater risk because the furniture and equipment inside the building may fall or break due to horizontal force and may cause amplified acceleration within the building.

Therefore, it is necessary to reinforce the construction of the seismic isolator that can structurally isolate the structure from the earthquake horizontal force caused by the earthquake as well as the earthquake-resistant construction. In the case of an earthquake isolation system equipped with a seismic isolator, the seismic force itself is not transmitted to the structure, so the usability and stability of the structure can be maintained even when an earthquake occurs.

In the present invention, a seismic and seismic isolator 2 for switchgear that structurally isolates the switchgear housing 54, which is a structure, so that the seismic force itself is not transmitted, as shown in FIG. 3, is mounted as shown in FIG. It is configured to perform an attenuation function that can absorb and dissipate the energy transferred to it.

The seismic device 2 for a switchboard according to an embodiment of the present invention supports and fixes the base surface of the switchboard enclosure 54 installed on the concrete-cast floor structure 60 in a balanced manner as shown in FIGS. 3 to 5 . Thus, it is a structure that can protect the switchgear from external shocks or vibrations caused by earthquakes.

The seismic and seismic isolator (2) for switchgear of the present invention protects the switchgear to withstand earthquake strength up to 9.0 or 10.0, and furthermore, the switchgear housing 54 is installed on the floor structure 60 against the seismic force in the horizontal direction of the seismic wave as shown in FIG. It is composed of a seismic isolating structure that separates it from the base, so that the switchgear housing 54 at the top does not shake even with the earthquake horizontal force, and it provides good usability in everyday life.

In the present invention, as in FIGS. 4 and 5, in order to install the seismic and seismic isolator 2 for the switchgear that supports and fixes the base surface of the switchgear housing 54, as shown in FIGS. 4 and 5, the frame 66 is placed on the floor structure 60, and the anchor ( 62), and a seismic resistance and seismic isolator (2) for switchgear is installed on the frame (66) fixed by the anchor (62).

When the seismic and seismic isolator 2 for switchgear is installed, as shown in FIG. 2, the housing 10 of the seismic and seismic isolator 2 is protected from external rainwater, etc. It also includes a configuration for enclosing the storage cylinder body 10 by fastening the C-shaped cases 50 and 52 with openings facing each other with bolts 42 and 56 located in the .

As shown in FIG. 1, the seismic and seismic isolator 2 for switchgear of the present invention has a cylindrical appearance, so that almost all of the internal components can be sealed or hidden from the external environment, and the load and strong earthquake vibration of the switchgear housing 54 It also has a functional configuration that can prevent the internal spring from being squeezed or separated.

The switchgear seismic and seismic isolator (2) of the present invention is largely composed of a cylinder body (12) and a mount member (14), and a ball bearing (44) arranged in a balanced manner in the inner chamber of the housing body (10). and the sliding plate member 46 mounted on the ball bearings 44, the vibration-proof spring 30 mounted on the sliding plate member 46, and the vibration-proof spring 30, which can protrude to the upper part of the housing body 10 It is composed of a piston member (32) and a vibration-proof buffer tube body (38) fitted to the piston member (32).

Most of the components of the switchgear earthquake-proof and seismic isolator 2 are made of metal except for the vibration-proof shock absorber 38, and the housing 10 is preferably made of a cylindrical body.

The housing body 10 composed of the cylinder body 12 and the mount member 14 is a means for mounting internal components such as the ball springs 44, the sliding plate member 46, and the anti-vibration spring 30, and the mount In a state in which the ball springs 44, the sliding plate member 46, the vibration-proof spring 30, and the piston member 32 are sequentially stacked on the member 14, the cylinder body 12 is inserted into the cylinder body 12. and the lower mount member 14 is screwed together to mount the component inside the tubular body.

Among the components constituting the housing body 10, the mount member 14 has a circular area receiving groove 24 for accommodating the horizontal sliding motion of the sliding plate member 46 for allowing the seismic isolation range. The ball bearing receiving grooves 48 are configured to be concentrically arranged in the circular area accommodating groove 24 of the mount member 14, and each of the ball bearings 44 is assigned to the circular area receiving groove 24 of the mount member 14. Ball bearing receiving arcs 48 are arranged at regular intervals along a concentric circle so that the ball bearings 44 can be fixed in position.

In addition, in the circular area receiving groove 24 of the mount member 14, a screw tap hole 20 for screwing the spring pressure adjusting bolt 40 is formed in the center, and on the bottom surface of the bottom of the mount member 14, concrete and Threaded grooves 26 for fixing the bolts 56 via the frame 66 to the same floor structure 60 are formed concentrically.

In the ball bearing receiving grooves 48 concentrically arranged in the circular area receiving grooves 14 formed on the upper surface of the mount member 14, each ball bearing 44 is positioned with a lower part of it in a locked state so that it can perform rolling motion. And, on the ball bearings 44 arranged in a concentric circle, the sliding plate member 46 capable of horizontal movement of the seismic isolation range allowed by the housing cylinder 14 is placed on it.

The number of ball bearings 44 must be three or more in order to maintain a sense of balance of the sliding plate member 46 , and the number may be increased according to the degree of load of the switchgear housing 54 .

The sliding plate member 46 has a spring seating groove 49 formed on its upper surface so that the anti-vibration spring 30 is seated. A surface vacuum axle hole 47 having a tolerance diameter allowing surface vibration movement in the direction is formed.

The sliding plate member 46, which is balanced by the ball bearings 44, significantly improves the transmission of the horizontal movement of the mount member 14 due to the sliding action of the ball bearings 44 and the load effect of the switchgear housing 54 when an earthquake occurs. receive less That is, there is little horizontal shaking of the sliding fun member 46 during an earthquake.

The anti-vibration spring 30, the root part of which is seated in the spring seating groove 49 of the sliding plate member 46, has a supporting elastic force that can support the vertical load of the upper structure (switchboard housing) so as to have the required performance of the dust-proof and seismic-isolation structure. It has high resistance to displacement such as temperature change, wind load and braking load, and has sufficient restoring elasticity to return to the original position after ground vibration is stopped.

The anti-vibration spring 12 may alleviate some horizontal vibrations as well as mitigate vertical vibrations.

A piston member 32 is mounted on the upper free end of the anti-vibration spring 12 .

The piston member 32 has a shape having a lower flange portion 32a and an upper column portion 32b, and the body of the spring pressure adjustment bolt 40 passes through the center of the spring pressure adjustment bolt 40 according to the ground vibration. An isolating tolerance shaft hole 34 having a tolerance for allowing horizontal oscillation for vibration isolation is formed. On the outer peripheral side of the upper surface of the piston member 32, a threaded groove 37 for fastening the bolt 42 is formed in a concentric arrangement. The number of the grooves 37 is preferably two to three. A spring seating groove 36 is also formed on the bottom surface of the piston member 32 .

A vibration-proof buffer body 38 is fitted to the upper column portion 32b of the piston member 32 . It is preferable that the vibration-proof buffer body 38 is configured in the form of a urethane cushion ring, and serves to alleviate horizontal vibration.

Therefore, the upper column portion 32b of the piston member 32 fitted with the vibration damping tube body 38 is configured to protrude upward through the upper opening 18 of the cylinder body 12 among the housing cylinders 10, The piston member 32 into which the buffer tube body 38 is fitted is configured to be relatively movable up, down, left, and right with respect to the housing body 10 .

In addition, in the present invention, a spring pressure adjusting bolt 40 is provided for limiting the working distance of the piston member 32 and for controlling the pressure of the anti-vibration spring 30 so as to improve daily usability and transport durability. ) is the mounting member ( 14) is configured to be bolted to the screw tap hole 20.

After being covered with the C-shaped case 50 on the piston member 32, the switchgear housing 54 is placed on the piston member 32, and the piston member 32 with the bolt 42 through the lower frame of the switchgear housing 54. The installation of the earthquake-proof and seismic isolator (2) is completed by screwing into the groove (37) of the.

The seismic and seismic isolator 2 according to the present invention is mainly installed in four places near the bottom edge of the switchgear housing 54, and the center of gravity in the switchgear housing 54 is not in the center and is focused on the side where a heavy load is applied. By using the spring pressure adjusting bolts 40 of the corners of the switchgear housing 54, the user can adjust the pressure of the vibration-proof spring 30 in the corresponding earthquake-proof and vibration-isolation device 2 and the operating distance of the piston member 32 By performing this, it is possible to provide a sense of balance in all directions even in an unbalanced weight distribution to improve usability in everyday life. In addition, by maximally tightening the spring pressure adjusting bolt 40 during transport, shaking caused by the anti-vibration spring 30 during transport can be eliminated.

Furthermore, the seismic and seismic isolator 2 for switchgear of the present invention also has ball bearings 44 and sliding plate members ( 46), the horizontal vibration from the ground is hardly transmitted to the switchgear housing 54 by the isolation operation against the horizontal displacement, so that structural separation is achieved.

In addition, the seismic and seismic isolator 2 for switchgear has excellent energy dissipation and damping performance for controlling the relative displacement between the switchgear housing 54 and the ground, that is, the floor structure 60, so that the seismic isolation performance is properly exhibited.

Although specific embodiments have been described in the above description of the present invention, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be defined by the claims and equivalents to the claims.

(2)-- Seismic and seismic isolator (10)-- Storage cylinder
(12)-- Cylinder body (14)-- Mount member
(16)-- Interlocking rim (18)-- Upper opening
(20)-- Thread tap hole (22)-- Thread part
(24)-- Spring Anchored Groove (26)(37)-- Threaded Groove
(30)-- Anti-vibration spring (32)-- Piston member
(32a)-- Flange part (34)-- Surface clearance shaft hole
(36)-- Spring Anchored Groove (38)-- Anti-vibration Buffer Body
(40)-- Spring pressure adjusting bolt (42)(56)-- Bolt
(44)-- Ball bearing (46)-- Sliding plate member
(47)-- Shaft bore for surface tolerance (48)-- Receiving groove for ball bearing
(49)-- Spring Anchored Groove (50)(52)-- C-shaped Case
(54)-- Switchgear enclosure (60)-- Floor structure
(62)-- Anchor (66)-- Frame
(70)-- S wave (72)-- L wave

Claims (2)

In the earthquake-proof and seismic isolator for switchgear,
A plurality of ball bearings 44 are arranged on the surface of the mount member 14 of the housing body 10, and a sliding plate member 46 capable of horizontal movement of the seismic isolation range allowed by the housing body 14 is provided on the ball bearings 44. The anti-vibration spring 30 is configured to be seated on the sliding plate member 46 in the mounted state,
On the free end of the upper free end of the anti-vibration spring 30 accommodated in the inner chamber of the housing 10, a piston member 32 having a vacuum isolation shaft hole 34 having a tolerance for allowing horizontal movement for vibration isolation is placed on the housing unit 10. It is configured to protrude upward through the upper opening 18 of
The spring pressure adjustment bolt 40 for limiting the working distance of the piston member 32 and for controlling the pressure of the vibration-proof spring 30 penetrates the surface vacuum difference shaft hole 34 of the piston member 32 to mount the housing 10. It is configured to be bolted to the screw tap hole 20 of the member 14,
The mount member 14 has a circular-area accommodating groove 24 for accommodating the horizontal sliding movement of the sliding plate member 46 for allowing the seismic isolation range, and the ball bearings 44 are located in the circular-area accommodating groove 24. A seismic and seismic isolator for switchgear, characterized in that a plurality of ball bearing receiving grooves (48) arranged concentrically to be fixed in position are formed. delete

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