KR102185213B1 - Earthquake Vibration Damping Device and Electricity Distribution Board Employing the same - Google Patents

Abstract

The present invention relates to a seismic device which is applicable to a small to medium sized switchboard by only control of modulus of elasticity in an absorption member while reducing shock when earthquake occurs to sufficiently support a switchboard of heavy load, and may be efficiently applied to shock of various directions including a vertical direction and a horizontal direction. According to the seismic device of the present invention, an upper plate (110), a buffer member bracket (130), an upper sphere bracket (150), a lower sphere bracket (190), and a bottom plate (210) are locked by a plurality of locking bolts (220a~220d). When a vertical vibration is applied, plate buffer members (140a~140e) between the upper plate (110) and the buffer member bracket (130), a plurality of first compression springs (170a~170d) between the upper sphere bracket (150) and the lower sphere bracket (190), and a plurality of second compression springs (200a~200e) between the lower sphere bracket (190) and the bottom plate (210) absorb shock. When a horizontal vibration is applied, shock is absorbed by mutual operation of a plurality of upper spheres (160a~160d), the plurality of first compression springs (170a~170d), and a plurality of lower spheres (180a~180d) disposed between the upper sphere bracket (150) and the lower sphere bracket (190).

Description

Earthquake Vibration Damping Device and Electricity Distribution Board Employing the same}

The present invention relates to a seismic device, and in particular, to a seismic device for protection of a switchgear that can absorb and attenuate vibrations caused by an earthquake to prevent damage to a switchboard that may be caused by an earthquake, inability to operate, and a fire. will be. In addition, the present invention relates to a switchgear employing such a seismic device.

The switchboard is a facility that receives high-voltage power transmitted from a power plant or substation and distributes it inside the customer's facility by stepping down, and power devices and parts such as transformers, circuit breakers, relays, power fuses, arresters, and integrated watt-hour meters stored inside the enclosure. It is composed of a structure that attaches and supports them, and a cable for connection with devices in the facility. These switchgears are subdivided into various names, such as high-voltage panel, low-voltage panel, motor control panel (MCC panel), and distribution panel, depending on the size and use. The housing of the switchgear is embedded or attached to the wall of a building, or is fixedly installed on the ground, and in particular, in the case of large facilities, it is common to take the form of a self-supporting type that is fixedly installed on the ground.

Since such a self-supporting switchboard is installed on the upper part of the foundation frame fixedly installed on the concrete floor, the shock is transmitted as it is when vibrations caused by earthquakes, etc., and various devices installed inside may be damaged and short-circuited, resulting in a failure in the supply of power to the building. In some cases, there is also a risk of fire. Therefore, in recent years, the seismic design standards for switchgear provided in buildings are gradually strengthened, and various seismic devices have been proposed to reduce the transmission of vibrations and shocks to the switchgear due to earthquakes.

For example, Korean Patent Publication No. 10-1704468 discloses a switchboard in which a spring is installed between an upper plate and a bottom fastening member. In addition, Korean Patent Publication Nos. 10-1274982 and Publication No. 10-2019-9393 also propose a seismic device having a structure dependent on the elasticity of a spring. By the way, the weight of the self-supporting switchgear ranges from about 500kg to about 7 tons, whereas most of the conventional seismic devices have a structure in which a buffer member such as a spring is simply interposed between the switchboard housing and the ground. It is difficult to apply to the switchgear. In other words, it is difficult for the conventional seismic device to block an impact from being applied to a high-load switchboard when an earthquake occurs, and rather, it is highly likely to be damaged without supporting the weight of the switchboard even during normal times.

On the other hand, when an earthquake occurs, the switchboard may be subjected to shocks in various directions, such as vertical vibration, horizontal vibration, and warping. In most cases, conventional seismic devices only act on shocks in a certain direction. For example, the prior art illustrated above works only for vertical vibration and has little effect on horizontal vibration. Registered Patent Publication No. 10-1757700 proposes a seismic device in which a number of buffer springs extending in the horizontal direction are installed on a spherical gravity body supported by a support spring, but the vertical buffering by the support spring can also be partially expected. However, the focus is on horizontal buffering.

Registered Patent Publication No. 10-1704468 (2017. 2. 22,), page 1, summary and representative diagram Registered Patent Publication No. 10-1274982 (2013. 6. 17.), Figure 3 Unexamined Patent Publication No. 10-2019-9393 (January 28, 2019), Fig. 4 Registered Patent Publication No. 10-1757700 (2017. 7. 17.), FIGS. 1 to 4

The present invention is to solve such a problem, and can be applied to small and medium-sized switchgear only by adjusting the elastic modulus of the buffer member while sufficiently supporting the switchboard of high load and alleviating the impact in case of an earthquake, and can be applied in the vertical direction and the horizontal direction. It is a technical problem to provide a seismic device that can effectively act against impacts in various directions, such as.

In addition, the present invention is to provide a switchboard that can be sufficiently supported downward by a seismic device even under such a high load, that can cushion an impact when an earthquake occurs, and can be protected from impacts in various directions such as vertical and horizontal directions. Another technical challenge.

In the seismic device of the present invention for achieving the above technical problem, fastening bolt insertion holes for inserting fastening bolts are formed inside the four vertices, and an adjuster bolt insertion hole is formed through the top and bottom at the center part, and the adjustment An upper plate having a bolt head receiving groove formed at a lower end of the bolt insertion hole for receiving the head of the adjuster bolt, and the upper surface of which the upper surface can be fixed to the bottom of the switchboard by the adjuster bolt; A buffer member bracket disposed under the upper plate, fastening bolt insertion holes formed inside the four vertices, and a buffer member receiving groove formed on the bottom surface; A plate-shaped buffer member, each of which is installed by being partially fitted into the buffer member receiving groove of the buffer member bracket; An upper spherical bracket disposed on the lower side of the plate-shaped buffer member, in which fastening bolt insertion holes penetrate up and down inside the four vertices, and having a plurality of spherical insertion grooves recessed upward on the bottom surface; A plurality of upper spheres, each of which is seated in one of the plurality of sphere insertion grooves of the upper sphere bracket from below; A lower sphere bracket disposed on the lower side of the upper sphere bracket, in which fastening bolt insertion holes are formed inside the four vertices through the top and bottom, and a plurality of sphere insertion grooves recessed downward on the upper surface are formed; A plurality of lower spheres each provided to form a pair of spheres with any one of the plurality of upper spheres and seated in any one of a plurality of sphere insertion grooves of the lower sphere bracket; A plurality of first compression springs, each of which is installed between any one of the plurality of pairs of spheres, and the upper and lower ends thereof are supported by one upper sphere and one lower sphere forming the pair of spheres; A bottom plate disposed on the lower side of the lower sphere bracket and formed by indenting fastening bolt insertion holes downwardly inward from the upper surface inside the four vertices, and having a plurality of spring receiving grooves formed on the upper surface; A plurality of second compression springs, each of which is inserted and installed between the bottom surface of the lower concrete bracket and the plurality of spring receiving grooves of the bottom plate; And a plurality of fastening bolts each passing through the fastening bolt insertion holes of the upper plate, the buffer member bracket, the upper spherical bracket, and the lower spherical bracket, and fastened to the bottom plate.

The buffer member accommodating groove may include a plurality of annular buffer member accommodating grooves formed at the bottom of each of the fastening bolt insertion holes of the buffer member bracket to accommodate an annular buffer member having a fastening bolt through hole formed therein. have.

The buffer member receiving groove may further include a pad-type buffer member receiving groove that is formed to be recessed upward from the bottom surface of the buffer member bracket to accommodate the pad-type buffer member.

The plate-shaped buffer member may be made of a rubber material.

The spherical insertion groove of the upper spherical bracket may include a spherical support surface recessed while forming a spherical surface, and the spherical insertion groove of the lower spherical bracket may include a spherical support spherical recessed surface.

At least some of the plurality of spring receiving grooves formed in the bottom plate are formed outside the upper ends of the fastening bolt insertion holes, so that at least some of the plurality of second compression springs are formed of a corresponding fastening bolt among the plurality of fastening bolts. It may be installed to surround the outer circumferential surface.

According to the present invention, even if the installation surface fluctuates when an earthquake occurs and a shock may be applied to the switchgear, the shock is absorbed and mitigated to block or reduce the transmission to the switchboard, and conduction of the switchboard or various devices installed inside the switchboard. And damage of parts, and thus, malfunctions and performance degradation of the switchgear are effectively prevented, so that power supply through the switchgear can be continuously performed without any problems.

In particular, since the seismic device of the present invention is constructed based on a mold spring with high rigidity and high modulus of elasticity, it has high structural stability, so that it can sufficiently support the high-load switchgear and is less likely to be damaged when an earthquake occurs. By sufficiently absorbing and mitigating high stress, it can block or reduce the transmission to the high-load switchgear. It goes without saying that it can be applied to small and medium-sized switchgear by appropriately selecting the modulus of elasticity of the mold spring or by using a general spring instead of the mold spring.

In addition, since the seismic device of the present invention includes a spring that is arranged to extend in the vertical direction to mitigate vertical impact, and a sphere that supports the upper and lower ends of at least some of the springs, even when an impact in the horizontal direction is applied It is possible to mitigate horizontal impact and distortion through the spring's elasticity and the rolling action of the sphere while preventing the spring from dislodging.

Moreover, by the action of the plate-shaped buffer member, that is, the vibration-proof rubber plate, the switchboard support function and the buffer function can be further improved.

The springs, spheres, and anti-vibration rubber plates are seated in the receiving grooves effectively formed in the upper and lower support members, so that they can perform their functions without departing even when an earthquake occurs. Particularly, since some of the springs are installed along the outer circumferential surface of the fastening bolt that is fastened while penetrating the entire seismic device, the possibility of the spring coming off even when a large vibration or shock is applied is significantly reduced, and the structure of the seismic device can be maintained. have.

As described above, the seismic device of the present invention can sufficiently support and protect the switchgear during an earthquake as well as in normal times through the triple buffering action of the spring and the vibration-proof rubber plate.

1 is a front view of a switchgear according to an embodiment of the present invention.
Fig. 2 is a bottom view of a switchgear showing an installation position of a seismic device.
3 is a perspective view of a seismic device according to an embodiment of the present invention.
4 is an exploded perspective view of a seismic device according to an embodiment of the present invention.
5A is a cross-sectional view taken along line AA of FIG. 4.
5B is a cross-sectional view taken along line BB of FIG. 4.
Figure 6 is a plan view of the top plate shown in Figure 3;
7A is a cross-sectional view taken along line AA of FIG. 6.
7B is a cross-sectional view taken along line BB of FIG. 6.
8 is a plan view of the buffer member bracket shown in FIG. 3.
9A is a cross-sectional view taken along line AA of FIG. 8.
9B is a cross-sectional view taken along line BB of FIG. 8.
Figure 10 is a plan view of the upper sphere bracket shown in Figure 3;
11A is a cross-sectional view taken along line AA of FIG. 10.
11B is a cross-sectional view taken along line BB of FIG. 10.
Figure 12 is a plan view of the lower sphere bracket shown in Figure 3;
13A is a cross-sectional view taken along line AA of FIG. 12.
13B is a cross-sectional view taken along line BB of FIG. 12.
14 is a plan view of the bottom plate shown in FIG. 3.
15A is a cross-sectional view taken along line AA of FIG. 14.
15B is a cross-sectional view taken along line BB of FIG. 14.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are assigned to the same or corresponding members for convenience.

Referring to FIG. 1, the switchboard 10 according to the present invention includes one or more enclosures having a substantially rectangular parallelepiped shape, and a seismic device 100 is installed on the bottom of each enclosure. As shown in FIG. 2, a plurality of seismic devices 100 are installed on the bottom surface of each enclosure constituting the switchgear 10. For example, the seismic device 100 may be installed inside the four vertices at the bottom of the enclosure. In addition, the seismic device 100 may be additionally installed at a position that is approximately the center of the bottom surface of the enclosure. The upper part of each seismic device 100 may be fixed to the lower surface of the case by an adjuster bolt, as described later, and the lower part may be fixed on the enclosure installation surface, for example, a concrete foundation by an anchor bolt.

Such a seismic device 100 not only supports the switchgear 10 from below, but also absorbs and mitigates seismic waves or other vibrations that propagate toward the switchgear so that seismic waves or other vibrations are transmitted to the switchgear 10. Block things. Here, the switchboard 10 includes a special high-voltage board, a high-voltage board, a low-voltage board, an electric motor control board, a distribution board, and a variation base, and throughout the present specification including the claims, the'distribution board' refers to these devices. Is used.

The seismic device 100 may be shipped in a form attached to the switchgear 10 in the process of manufacturing the switchboard 10 in a factory that produces the switchboard 10, or the switchboard 10 that is already installed or scheduled to be installed. It may be additionally mounted on.

3 is a perspective view of a seismic device 100 according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of the seismic device 100 according to an embodiment of the present invention, and FIG. 5A is a cross-sectional view taken along line AA of FIG. 4 And FIG. 5B is a cross-sectional view taken along line BB of FIG. 4.

3 to 5B, the seismic device 100 includes an upper plate 110, a buffer member bracket 130, a plate-shaped buffer member 140a to 140e, an upper sphere bracket 150, and a plurality of upper spheres 160 ), a plurality of first compression springs 170a-170d, a plurality of lower spheres 180, a lower sphere bracket 190, a plurality of second compression springs 200a-200e, a bottom plate 210, and a plurality of Fastening bolts (220a ~ 220d; abbreviated 220 as necessary) is provided.

The upper plate 110 is a member fixed to the bottom of the switchgear 10 by the adjuster bolt 120. 6, 7A, and 7B, fastening bolt insertion holes 112a to 112d for inserting the fastening bolt 220 are formed inside the four vertices of the upper plate 110. The upper end of the fastening bolt insertion holes 112a to 112d has an inner diameter wider than that of the lower side so that the bolt head receiving groove 116 for receiving the head of the fastening bolt 220 is formed. In addition, an adjuster bolt insertion hole 114 is formed through the top and bottom at the center of the upper plate 110, and the head of the adjuster bolt 120 is at the lower end of the adjuster bolt insertion hole 12. The bolt head receiving groove 116 for receiving is formed.

Accordingly, the adjuster bolt 120 is fitted into the adjuster bolt insertion hole 114 from the bottom through the bolt head receiving groove 116, and in this state, the upper plate 110 is the buffer member bracket 130 on the lower side. Is coupled to, and accordingly, the adjuster bolt 120 is gripped by the upper plate 110 and the buffer member bracket 130 in a state in which the screw portion opposite the bolt head is exposed upward of the upper plate 110 .

Referring again to FIGS. 3 to 5B, a buffer member bracket 130 is disposed under the upper plate 11. 8, 9A, and 9B, fastening bolt insertion holes 132a to 132d for passing the fastening bolt 220 are formed inside the four vertices of the buffer member bracket 130. In addition, buffer member receiving grooves 134a to 134e for accommodating plate-shaped buffer members 140a to 140e are formed on the bottom of the buffer member bracket 130. In one embodiment, the plate-shaped buffer members 140a to 140e are made of a rubber material and thus have a shape of a vibration-proof rubber plate as a whole.

Accordingly, the upper side of each of the plate-shaped buffer members 140a to 140e can be partially fitted into the buffer member receiving grooves 134a to 134e of the buffer member bracket 130. In the illustrated embodiment, some of the buffer member receiving grooves 134a to 134e are formed at lower ends of each of the fastening bolt insertion holes 132a to 132d. Accordingly, to prevent interference with the fastening bolt 220, the buffer members 140a to 140d accommodated in the buffer member receiving grooves 134a to 134d have a ring shape in which a fastening bolt through hole is formed. On the other hand, since the remaining buffer member receiving groove 124e does not interfere with the fastening bolt 220, it is in the form of a pad in which a through hole is not separately formed.

Referring back to FIGS. 3 to 5B, an upper spherical bracket 150 and a lower spherical bracket 190 are disposed on the lower side of the plate-shaped buffer members 140a to 140e, and the upper spherical bracket 150 and the lower spherical bracket 190 A plurality of first compression springs (170a to 170d) are installed between the plurality of upper spheres (160a to 160d) and the plurality of lower spheres (180a to 180d).

10, 11A, and 11B, fastening bolt insertion holes 152a to 152d for passing the fastening bolt 220 are formed inside the four vertices of the upper spherical bracket 150. In addition, a plurality of spherical insertion grooves 154a to 154d recessed upwards are formed on the bottom of the upper spherical bracket 150. In the illustrated embodiment, the spherical insertion grooves (154a to 154d) are formed inside the middle portion of each bottom edge of the upper spherical bracket 150. Each of the plurality of spherical insertion grooves 154a to 154d has a recessed groove cut into a cylindrical shape, and a spherical support surface 156a to 156d additionally recessed upward is formed at the center of the ceiling of the groove. The radius of curvature of the spherical support surfaces 156a to 156d is the same as the radius of the upper spheres 160a to 160d, or the upper spheres 160a to 160d to allow limited displacement of the upper spheres 160a to 160d when a large impact is applied. It is preferably slightly larger than the radius of 160d).

12, 13a, and 13b, fastening bolt insertion holes 192a to 192d for passing the fastening bolt 220 are formed inside the four vertices of the lower spherical bracket 190. In addition, a plurality of spherical insertion grooves 194a to 194d recessed downward are formed on the upper surface of the lower spherical bracket 190. In the illustrated embodiment, the spherical insertion grooves 194a to 194d are formed inside the middle portion of the corner of each upper surface of the lower spherical bracket 190. Each of the plurality of spherical insertion grooves 194a to 194d has a recessed groove cut into a cylindrical shape, and a spherical support surface 196a to 196d additionally recessed downward is formed at the center of the bottom surface of the groove. . The radius of curvature of the spherical support surfaces 19a to 196d is the same as the radius of the lower spheres 180a to 180d, or the lower spheres 180a to 180d allow limited displacement of the lower spheres 180a to 180d when a large impact is applied. It is preferably slightly larger than the radius of 180d).

Referring again to FIGS. 3 to 5B, any one of a plurality of upper spheres 160a to 160d is inserted and seated in each of the sphere insertion grooves 154a to 154d of the upper sphere bracket 150. In the installed state, each of the upper spheres (160a to 160d) is partially in close contact with the sphere support surfaces (156a to 156d) of the sphere insertion grooves (154a to 154d), the rest of the sphere from the support surfaces (156a to 156d) It will protrude downward. In addition, any one of a plurality of upper spheres 180a to 180d is inserted and seated in each of the sphere insertion grooves 194a to 194d of the lower sphere bracket 190. In the installed state, each of the lower spheres (180a to 180d) is partially in close contact with the sphere support surfaces (196a to 196d) of the sphere insertion grooves (194a to 194d), the rest of the sphere from the support surfaces (196a to 196d). It will protrude downward.

The upper spheres 160a to 160d and the lower spheres 180a to 180d may be made of stainless steel. The diameters of the upper spheres 160a to 160d and the lower spheres 180a to 180d are larger than the inner diameters of the first compression springs 170a to 170d, and are inside through the top or bottom of the first compression springs 170a to 170d. The first compression springs 170a to 170d may be supported without being swept away. It is preferable that heat-resistant grease is applied to the upper spheres 160a to 160d and the lower spheres 180a to 180d.

Among the plurality of upper spheres 160a to 160d and the plurality of lower spheres 180a to 180d, the upper spheres 160a and the lower spheres 180a form a pair, and a compression spring 170a is installed between them. In addition, the upper sphere (160b) and the lower sphere (180b) form a pair, a compression spring (170b) is installed between them, and the upper sphere (160c) and the lower sphere (180c) form a pair, and compression between them A spring 170c is installed, and the upper sphere 160d and the lower sphere 180d form a pair, and a compression spring 170d is installed between them.

The first compression springs 170a to 170d may be, for example, a die spring manufactured through a stamping process. In general, a mold spring is a type of compression spring, has a rectangular cross section, and has excellent durability because it is manufactured using a high alloy wire. In particular, since the mold spring used in the present invention has high rigidity and high structural stability, it has the advantage that it can sufficiently support the high-load switchgear and has less possibility of breakage even in normal times, and sufficiently absorbs high stress in the event of an earthquake. By mitigating it, it is possible to block or reduce the transmission to the high-load switchgear. According to the size of the switchboard, the stiffness can be adjusted by appropriately selecting the modulus of elasticity of the mold spring. Furthermore, for small and medium-sized switchgear, a general coil spring can be used instead of the mold spring.

A bottom plate 210 is disposed under the lower sphere bracket 190. 14, 15A, and 15B, fastening bolt insertion holes 212a to 212d for inserting the fastening bolt 220 are formed inside the four vertices of the bottom plate 210. Threads 214a to 214d for fastening with the fastening bolt 220 may be formed on the inner circumferential surface of each of the fastening bolt insertion holes 212a to 212d, but the present invention is not limited thereto, and the fastening bolt 220 It can also be fixed by a separate nut.

Further, spring receiving grooves 214a to 214e for receiving and supporting the lower ends of the second compression springs 200a to 200e are formed on the upper surface of the bottom plate 210. In addition, at least a portion of the bottom plate 210 extends outward in the lateral direction, and anchor bolt through holes 218a and 218a are formed in the extended portion.

Any one of a plurality of second compression springs 200a to 200e is installed between the bottom surface of the lower concrete bracket 190 and the plurality of spring receiving grooves 214a to 214e of the bottom plate 210. A mold spring may be used for the second compression springs 200a to 200e as well as the first compression springs 170a to 170d, but the present invention is not limited thereto.

Some of the spring receiving grooves 214a to 214d among the spring receiving grooves 214a to 214e are respectively formed to extend outward from the upper ends of each of the fastening bolt insertion holes 212a to 212d. Accordingly, some of the springs 200a to 200d among the second compression springs 200a to 200e are installed to surround the outer peripheral surface of the fastening bolt 220 passing through the fastening bolt insertion holes 132a to 132d. At this time, the inner diameter of the second compression spring (200a ~ 200d) is greater than the outer diameter of the fastening bolt 220, when there is no impact due to earthquake, interference between the second compression spring (200a ~ 200d) and the fastening bolt 220 does not occur. . When a large impact occurs due to an earthquake, the fastening bolt 220 restrains the second compression springs 200a to 200d to prevent separation.

The above seismic device is assembled and installed as follows.

First, by inserting the adjuster bolt 120 upward from the bolt head receiving groove 116 on the bottom of the upper plate 110, the adjuster bolt 120 is moved upward through the adjuster bolt insertion hole 114 After being exposed, the cushioning member bracket 130 is in close contact with the bottom surface of the upper plate 110 to prevent the adjuster bolt 120 from being separated. When inserting the adjuster bolt 120 into the adjuster bolt insertion hole 114, an O-ring may be disposed between the head of the adjuster bolt 120 and the bolt head receiving groove 116.

Subsequently, through the fastening bolt insertion holes 112a to 112d of the upper plate 110 and the fastening bolt insertion holes 132a to 132d of the buffer member bracket 130, the fastening bolts 220a to 220d are inserted and fastened. After inserting the plate-shaped buffer members 140a-140e into the bolts 220a-220d, the fastening bolt insertion holes 152a-152d of the upper spherical bracket 150 and the lower spherical bracket 150 are additionally inserted into the fastening bolts 220a-220d. 190) of the fastening bolt insertion holes (192a ~ 192d) are also inserted.

Then, after securing a space between the upper sphere bracket 150 and the lower sphere bracket 190, the upper sphere (160a ~ 160d) is seated in the sphere insertion groove (154a ~ 154d) of the upper sphere bracket (150) , After seating the lower spheres (180a~180d) in the sphere insertion grooves (194a~194d) of the lower sphere bracket 190, the first compression spring between the upper spheres (160a~160d) and the lower spheres (180a~180d) After inserting (170a~170d), the lower sphere bracket 190 is pressed in the direction of the upper sphere bracket 150, so that the upper spheres 160a~160d, the first compression springs 170a~170d, and the lower sphere 180a ~180d) is prevented.

Subsequently, after inserting the second compression springs 200a to 200d into the fastening bolts 220a to 220d, the fastening bolt insertion holes 212a to 212d of the bottom plate 210 are also inserted into the fastening bolts 220a to 220d. At this time, the second compression spring 200e disposed in the center of the bottom plate 210 is also installed between the lower spherical bracket 190 and the spring receiving grooves 214a to 214e of the bottom plate 210.

Finally, in a state where each member is pressed so that it is firmly and closely attached, the threads 222 at the bottom of the fastening bolts 220a to 220d are placed on the inner circumferential surface of the fastening bolt insertion holes 212a to 212d of the bottom plate 210. Assembly is completed by fastening to the existing threads 214a to 214d. When fastening the fastening bolts 220a to 220d, an O-ring may be disposed between the head and the shaft of each fastening bolt 220a to 220d.

When the assembly is completed, the shaft portion of the adjuster bolt 120, in particular, the screw portion protrudes through the adjuster bolt insertion hole 114 of the upper plate 110, and the screw portion of the adjuster bolt 120 The height adjustment nut 122 is fitted. By varying the position of the height adjustment nut 122, the level of the switchboard 10 or the overall height of the seismic device 100 from the bottom of the switchboard 10 to the installation surface can be varied. On the other hand, in order to prevent the bottom surface of the enclosure from being damaged due to the height adjustment nut 122, a reinforcing plate for distributing the load may be added on the height adjustment nut 122.

After inserting the shaft of the adjuster bolt 120 through the through hole formed on the bottom of the switchboard 10, from the bottom to the top, and then fastening the tightening nut 124 from the inside of the switchboard 10, the switchboard 10 The installation of the seismic device 100 may be completed.

Subsequently, anchor bolts (not shown) are inserted into the anchor bolt through-holes 218a and 218a in the bottom plate 210 to fix the seismic device 100 on the installation surface.

The seismic device 100 operates as follows.

In normal times when there is no earthquake or other vibration, the plate-shaped buffer members 140a to 140e, the first compression springs 170a to 170d, and the second compression springs 200a to 200e maintain sufficient rigidity while maintaining the switchboard 10. It is elastically supported from below.

When vertical vibrations due to earthquakes or other reasons are applied, the plate-shaped buffer members 140a to 140e, the first compression springs 170a to 170d, and the second compression springs 200a to 200e are all involved and cause an impact. It is absorbed, thereby preventing or minimizing the transmission of the shock to the switchboard 10. That is, at least a portion of the first compression springs 170a to 170d and at least a portion of the second compression springs 200a to 200e are compressed and then absorbed in the process of being restored by the elastic force, and accordingly, the shock is absorbed by the switchboard 10 ) Is not transmitted at all, or only part of it is transmitted, preventing fall or breakage. At this time, only a part of the plate-shaped buffer members 140a to 140e is compressed or expanded and then restored, thereby contributing to shock absorption.

Meanwhile, even when a horizontal vibration is applied, the plate-shaped buffer members 140a to 140e, the first compression springs 170a to 170d, and the second compression springs 200a to 200e are all involved to absorb the shock. When the magnitude of the horizontal vibration is large, each of the first compression springs 170a to 170d and the second compression springs 200a to 200e is twisted with respect to the spring center axis and then restored to absorb the shock. When the magnitude of the horizontal vibration is very large, the upper spheres 160a to 160d and the lower spheres 180a to 180d supporting the upper and lower ends of the first compression springs 170a to 170d slide in the transverse direction within a limited range. It may be displaced, and then restored by the elasticity of the first compression springs 170a to 170d. In this process, many impacts may be absorbed by friction generated inside each member and between the members. In the process of operation, the upper spheres 160a to 160d and the lower spheres 180a to 180d are twisted even when the first compression springs 170a to 170d are deformed and twisted, and the upper spheres 160a to 160d are the upper sphere brackets 150 ) Of the sphere insertion grooves (154a to 154d) and the lower spheres (180a to 180d) can be rotated within the sphere insertion grooves (194a to 194d) of the lower sphere bracket 190, and accordingly, the upper sphere (160a) ~ 160d) and the lower spheres (180a ~ 180d) can maintain the state of firmly elastically supporting the first compression springs (170a ~ 170d) and prevent the separation of the first compression springs (170a ~ 170d). As mentioned above, it is preferable to apply heat-resistant grease or fill lubricating oil to these spheres so that the rotation of the upper spheres 160a to 160d and the lower spheres 180a to 180d can be easily made.

The upper sphere bracket 150 and the lower sphere bracket 190 allow a limited range of the upper spheres (160a to 160d) and the lower spheres (180a to 180d), respectively, while preventing departure.

The fastening bolt insertion holes 122a to 122d, 152a to 152d, 192a to 192d respectively formed in the buffer member bracket 130, the upper spherical bracket 150, and the lower spherical bracket 190 have an inner diameter of the fastening bolt 220 Because it is larger than the outer diameter of, interference between members does not occur even when the seismic device 100 is distorted due to vibration.

On the other hand, the screw thread 222 is formed only in the vicinity of the lower end of the fastening bolt 220 and is only fastened with the bottom plate 210, and the buffer member bracket 130, the upper sphere bracket 150, and the lower sphere bracket 190 Since it is not fastened, the buffer member bracket 130, the upper spherical bracket 150, and the lower spherical bracket 190 can be moved by an external force based on the bottom plate 210, so that the plate-shaped buffer members 142a to 142e ), the first compression spring (170a ~ 170d), the second compression spring (200a ~ 200e) does not interfere with the compression, extension, and restoration operation. Moreover, since the head of the fastening bolt 220 is fitted to the bolt head receiving groove 118 of the upper plate 110 so as to move upward, a large impact is applied to the first or second compression springs 170a to 170d, When 200a to 200e) are compressed, the head of the fastening bolt 220 may protrude upward from the top plate 110, so that the seismic device 100 may be compressed as a whole.

The assembly is completed by making the screw thread 222 fasten to the threads 214a to 214d on the inner circumferential surface of the fastening bolt insertion holes 212a to 212d of the bottom plate 210.

The embodiments described above are illustrative in all respects and should be understood as non-limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

10: switchgear, 100: seismic device
110: top plate, 112a~112d: fastening bolt insertion hole
116: adjuster bolt insertion hole, 118: bolt head receiving groove
120: adjuster bolt, 130: buffer member bracket
132a~132d: fastening bolt insertion hole, 134a~134e: buffer member receiving groove
140, 140a~140e: plate-shaped buffer member. 150: upper sphere bracket
152a~152d: fastening bolt insertion hole, 154a~154d: sphere insertion groove
156a-156d: spherical support surface, 160, 160a-160d: upper sphere
170, 170a~170: first compression spring, 180, 180a~180d: lower sphere
190: lower sphere bracket, 192a~192d: fastening bolt insertion hole
194a~194d: sphere insertion groove, 196a~196d: sphere support surface
200, 200a~200e: second compression spring, 210: bottom plate
212a~212d: Fastening bolt insertion hole, 214a~214e: Spring receiving groove
220, 220a~220d: fastening bolt

Claims (7)

Fastening bolt insertion holes 112a to 112d for inserting fastening bolts are formed inside the four vertices, and an adjuster bolt insertion hole 116 is formed through the top and bottom in the center part, and the adjuster bolt is inserted A bolt head receiving groove 118 for accommodating the head of the adjuster bolt 120 is formed at the lower end of the ball 116, and the upper surface is fixed by the adjuster bolt 120 at the bottom of the switchgear 10 A top plate 110 that can be;
It is disposed under the upper plate 11, the fastening bolt insertion holes 132a to 132d are formed inside the four vertices, and the buffer member bracket having the buffer member receiving grooves 134a to 134e formed on the bottom surface ( 130);
Plate-shaped buffer members 140a to 140e, each of which is partially fitted into the buffer member receiving grooves 134a to 134e of the buffer member bracket 130 and installed;
It is disposed under the plate-shaped buffer member (140a ~ 140e), fastening bolt insertion holes (152a ~ 152d) are formed through the top and bottom inside the four vertices, and the spherical insertion groove ( 154a ~ 154d) the upper sphere bracket 150 is formed in a plurality;
A plurality of upper spheres (160a to 160d) each of which is seated from below in any one of the plurality of sphere insertion grooves (154a to 154d) of the upper sphere bracket (150);
It is disposed under the upper spherical bracket 150, fastening bolt insertion holes (192a to 192d) are formed through the upper and lower inside the four vertices, and the spherical insertion groove (194a) which is cut downward on the upper surface and indented ~194d) the lower sphere bracket 190 is formed in a plurality;
A plurality of lower spheres, each provided to form a sphere pair with any one of the plurality of upper spheres 160a to 160d, and seated in any one of the plurality of sphere insertion grooves 194a to 194d of the lower sphere bracket 190 ( 180a-180d);
Each is installed between any one of the plurality of pairs of spheres to form the pair of spheres by any one upper sphere (160a to 160d) and one lower sphere (180a to 180d) supported by a plurality of first Compression springs 170a-170d;
It is disposed under the lower sphere bracket 190, the fastening bolt insertion holes 212a to 212d are formed by being recessed downward from the upper surface inside the four vertices, and a plurality of spring receiving grooves 214a on the upper surface ~214e) the bottom plate 210 is formed;
A plurality of second compression springs (200a to 200e), each of which is inserted and installed between the bottom surface of the lower spherical bracket 190 and the plurality of spring receiving grooves (214a to 214e) of the bottom plate (210); And
Each passes through the fastening bolt insertion holes of the upper plate 110, the buffer member bracket 130, the upper spherical bracket 150, and the lower spherical bracket 190, and the plurality of second compression springs ( A plurality of fastening bolts 220a to 220d respectively penetrating through some of the second compression springs 200a to 200d of 200a to 200e and fastened to the bottom plate 210;
And a second compression spring 200a to 200d installed to surround the outer peripheral surfaces of the corresponding fastening bolts among the plurality of fastening bolts 220a to 220d. The method of claim 1, wherein the buffer member receiving groove (134a ~ 134e)
A plurality of annular buffers that are formed at the bottom of each of the fastening bolt insertion holes 132a to 132d of the buffer member bracket 130 to accommodate the annular buffer members 140a to 140d having a fastening bolt through hole formed therein. Seismic device including member receiving grooves (134a to 134d). The method of claim 2, wherein the buffer member receiving groove (134a ~ 134e)
A seismic device further comprising a pad-type buffer member receiving groove (124e) that is formed to be recessed upward from the bottom of the buffer member bracket (130) to accommodate the pad-type buffer member (140e). The earthquake-resistant device according to claim 2 or 3, wherein the plate-shaped buffer members (140a to 140e) are made of rubber. The method of claim 1,
The sphere insertion grooves (154a to 154d) of the upper sphere bracket (150) comprise a spherical support surface (156a to 156d) indented while forming a spherical surface,
Seismic device comprising a spherical support surface (196a to 196d) indented while the spherical insertion grooves (194a to 194d) of the lower spherical bracket (190) form a spherical surface. According to claim 1 or 2, Some of the spring receiving grooves (214a to 214d) of the plurality of spring receiving grooves (214a to 214e) formed in the bottom plate (210) are the fastening bolt insertion holes (212a to) 212d), wherein at least a portion of the plurality of second compression springs 200a to 200e is installed to surround the outer peripheral surface of the corresponding fastening bolt 220 among the plurality of fastening bolts. An enclosure in which electrical parts are stored; And
A plurality of vibration damping devices (100) installed on the bottom of the housing and suitable for damping vibrations caused by earthquakes when an earthquake occurs;
In the switchgear having a,
Each of the plurality of vibration damping devices 100
Fastening bolt insertion holes 112a to 112d for inserting fastening bolts are formed inside the four vertices, and an adjuster bolt insertion hole 116 is formed through the top and bottom in the center part, and the adjuster bolt is inserted A bolt head receiving groove 118 for accommodating the head of the adjuster bolt 120 is formed at the lower end of the ball 116, and the upper surface is fixed by the adjuster bolt 120 on the bottom surface of the housing. A top plate that can be 110;
A buffer member bracket disposed under the upper plate 110, fastening bolt insertion holes 132a to 132d formed inside the four vertices, and buffer member receiving grooves 134a to 134e formed on the bottom surface ( 130);
Plate-shaped buffer members 140a to 140e, each of which is partially fitted into the buffer member receiving grooves 134a to 134e of the buffer member bracket 130 and installed;
It is disposed under the plate-shaped buffer member (140a ~ 140e), fastening bolt insertion holes (152a ~ 152d) are formed through the top and bottom inside the four vertices, and the spherical insertion groove ( 154a ~ 154d) the upper sphere bracket 150 is formed in a plurality;
A plurality of upper spheres (160a to 160d) each of which is seated from below in any one of the plurality of sphere insertion grooves (154a to 154d) of the upper sphere bracket (150);
It is disposed under the upper spherical bracket 150, fastening bolt insertion holes (192a to 192d) are formed through the upper and lower inside the four vertices, and the spherical insertion groove (194a) which is cut downward on the upper surface and indented ~194d) the lower sphere bracket 190 is formed in a plurality;
A plurality of lower spheres, each provided to form a sphere pair with any one of the plurality of upper spheres 160a to 160d, and seated in any one of the plurality of sphere insertion grooves 194a to 194d of the lower sphere bracket 190 ( 180a-180d);
Each is installed between any one of the plurality of pairs of spheres to form the pair of spheres by any one upper sphere (160a to 160d) and one lower sphere (180a to 180d) supported by a plurality of first Compression springs 170a-170d;
It is disposed under the lower sphere bracket 190, the fastening bolt insertion holes 212a to 212d are formed by being recessed downward from the upper surface inside the four vertices, and a plurality of spring receiving grooves 214a on the upper surface ~214e) the bottom plate 210 is formed;
A plurality of second compression springs (200a to 200e), each of which is inserted and installed between the bottom surface of the lower spherical bracket 190 and the plurality of spring receiving grooves (214a to 214e) of the bottom plate (210); And
Each passes through the fastening bolt insertion holes of the upper plate 110, the buffer member bracket 130, the upper spherical bracket 150, and the lower spherical bracket 190, and the plurality of second compression springs ( A plurality of fastening bolts 220a to 220d respectively penetrating through some of the second compression springs 200a to 200d of 200a to 200e and fastened to the bottom plate 210;
And a switchboard installed so that the partial second compression springs 200a to 200d surround the outer circumferential surfaces of the corresponding fastening bolts among the plurality of fastening bolts 220a to 220d.

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