KR102415242B1 - Seismic damper capable of three-dimensional seismic resistance - Google Patents

Abstract

The present invention relates to a three-dimensional seismic damper installed in a lower part of a distribution board or the like to block or absorb vibrations. The three-dimensional seismic damper includes: a variable case comprising a lower frame, and an upper frame separated from the lower frame to be installed in an upper part of the lower frame; a main buffer spring installed between the upper frame and the lower frame; and a guide shaft inserted into the main buffer spring in a vertical direction and installed to be protruding higher than an upper side of the upper frame by penetrating the upper frame. A spherical ball formed into a spherical shape as a horizontal cross section of the guide shaft is provided in the bottom of the guide shaft, and a spherical pocket in which the spherical ball is contained to be rotatable in the same spot, is formed in an upper part of the lower frame. Therefore, when the main buffer spring attenuates vertical or horizontal vibrations, the guide shaft can guide both the lifting and shear-deformation of the upper frame due to the spherical ball.

Description

Seismic damper capable of three-dimensional seismic resistance

The present invention relates to a three-dimensional earthquake-resistant damper having a built-in vibration damping means so that facilities such as a high-voltage switchboard, a low-voltage switchboard, a motor control panel and a distribution board (hereinafter referred to as a switchboard) can be protected from vibration.

In Korea, as earthquakes of high intensity occur frequently in recent years, mandatory seismic design of buildings and structures is being promoted.

In general, the switchgear consists of a power receiving facility for receiving high voltage and special high voltage supplied from a substation, a substation facility for stepping down the high and special high voltage received from the substation into a commercial voltage, and converting the pressured electricity into lighting or electricity in each part of a building or factory. It is a device that safely sends to the device.

Various power devices are attached to the inside of the cubicle of the switchboard, and it is composed of a form in which they are connected or combined with each other.

However, when the switchboard is affected by vibration due to an earthquake, problems such as durability degradation or insulation breakdown may occur at the bonding point inside the switchboard due to vibration lasting more than a certain period of time due to deterioration or abrasion.

In addition, there is a risk of additional accidents such as damage to internal devices or an accident in which the switchboard is overturned due to an earthquake.

If such vibrations or shocks occur continuously, even if there is no external problem, in reality, while the vibration continues, a problem may occur at the internal contact point or other connection points due to long-term vibration, making it impossible to operate properly. It can lead to a fire accident and cause secondary damage.

In addition, in the case of the seismic protection device developed to protect the switchboard from vibration, it is possible to efficiently resist and isolate the earthquake by vertical vibration. In a situation where omnidirectional vibration is generated in a three-dimensionally tiltable direction, there is a problem in that it is difficult to obtain an earthquake-resistant or seismic isolating action as effective as the vertical direction.

Registered Patent Publication No. 10-1418247 (Announcement Date: 2014. 07. 10)

Accordingly, the present invention is capable of buffering not only vertical vibrations but also three-dimensional vibrations such as horizontal and inclined directions, and it is easy to restore to its original state. An object of the present invention is to provide a seismic damper capable of three-dimensional seismic resistance provided with a means that can be returned.

A three-dimensional earthquake-resistant damper according to the present invention for achieving this object is a variable case comprising a lower frame installed on a base surface, an upper frame separated from the lower frame and installed on the upper part of the lower frame, and the upper frame It is installed between and the lower frame, the main shock absorber spring is provided, and the main shock absorber spring absorbs and attenuates vibration between the upper frame and the lower frame, and the main shock absorber spring is inserted in the vertical direction and penetrates the upper frame. It is installed to protrude higher than the upper surface of the upper frame, and includes a guide shaft guiding that the upper frame is raised and lowered together according to the expansion and contraction of the main buffer spring, and the horizontal cross-sectional area of the guide shaft is expanded at the lower end of the guide shaft to have a spherical shape A spherical ball formed as The guide shaft may guide both the lifting and lowering of the upper frame and the variable shearing.

Here, around the main buffer spring, a plurality of horizontal retention springs are installed at a point radially symmetrical in the horizontal direction with respect to the center of the main buffer spring, whereby the plurality of horizontal retention springs are the buffer action of the main buffer spring. and at the same time disturbing the resonance period of the main buffer spring, resonance generation of the main buffer spring is suppressed, and tilting to either side is prevented when vibration is generated, thereby maintaining the horizontality of the upper frame.

In addition, the variable case may further include an inner upper frame provided on the lower surface of the upper frame and an inner lower frame provided on the upper surface of the lower frame, and the spherical pocket may be formed on the upper surface of the inner lower frame.

In this case, preferably, a second inner upper frame is further installed between the upper surface of the inner upper frame and the lower surface of the upper frame, and a cushioning action of the main buffer spring is provided between the second inner upper frame and the inner upper frame. An auxiliary buffer to assist may be installed.

In addition, the auxiliary buffer may be preferably made of a plurality of wire ropes installed in a curved shape, and a rope support block coupled to both ends of the wire rope to fix the wire rope.

Meanwhile, a hole through which the guide shaft can pass is formed in the upper frame, and a stopper nut having a diameter larger than the diameter of the hole may be coupled to an upper portion of the guide shaft that protrudes higher than the upper frame.

At this time, between the stopper nut and the upper frame, preferably, a hemispherical flow washer convexly formed toward the hole is installed, so that when the upper frame is changed relative to the lower frame, between the hole and the guide shaft and the stopper nut mutual interference and damage can be prevented.

And an elastic rope connecting the inner upper frame and the inner lower frame is installed at the center of the horizontal holding spring, and preferably, the elastic rope is coupled to the wire rope in a form surrounding the surface of the wire rope and the wire rope. It may consist of a tube.

On the other hand, between the lower frame and the base surface, preferably a slide member attached to the lower surface of the lower frame and convexly formed toward the base surface, and the upper surface of the base surface and the upper surface of the base surface has a greater curvature than that of the slide member. A displacement control buffer made of a curved plate formed of a concave surface having a radius is further provided, so that when vibration is generated, a relative change is possible between the variable case and the base surface, but when the vibration is weakened or eliminated, the slide member is By returning to the center of the lowest upper surface from the upper surface of the curved plate, the vibration in the shear direction is absorbed and the original return can be ensured.

Here, a stopper is formed on the upper edge of the curved plate to prevent the sliding member from deviate from the curved plate, and a positioning hole preferably formed with a constant diameter is formed in the center of the upper surface of the curved plate, so that the sliding member The process of returning the slide member to the center of the curved plate after the and the curved plate is relatively changed can be facilitated.

In this case, the position hole is provided with a variable accelerating spring, preferably composed of a leaf spring or a compression spring, and a contact member connected to the upper end of the variable accelerating spring and contacting the surface of the slide member, so that vibration in the shear direction is reduced. A phenomenon in which the sliding member deviates from the fixed hole is accelerated due to the repeated collision of the sliding member and the contact member in the situation that occurs, and the center of the bottom surface of the slide member is caught in the fixed hole, preventing free movement of the sliding member This can be prevented.

The earthquake-resistant damper capable of three-dimensional seismic resistance according to the present invention is capable of buffering not only vertical vibration but also three-dimensional three-dimensional vibration such as horizontal and inclination directions, and it is easy to restore to its original state. Even if the vibration stops, it has the effect of being able to immediately return to the original position.

1a is a perspective view of an earthquake-resistant damper capable of three-dimensional earthquake resistance according to the present invention;
Figure 1b is a side view in the direction A in Figure 1a;
Fig. 1c is a cross-sectional view of Fig. 1b;
Fig. 1d is a cross-sectional view taken in the direction B in Fig. 1a;
Figure 2 is an exploded perspective view of Figure 1a;
3a to 3c are enlarged views of each part in FIG. 2,
Figure 4a is an operational state diagram of Figure 1c;
Figure 4b is a conceptual diagram of the operation of the flow washer in Figure 4a;
Fig. 5a is a side view showing a further embodiment of Fig. 1b;
Figure 5b is a conceptual diagram showing the action of the displacement control buffer in Figure 5a;

Specific structural or functional descriptions presented in the embodiments of the present invention are only exemplified for the purpose of describing embodiments according to the concept of the present invention, and the embodiments according to the concept of the present invention may be implemented in various forms. In addition, it should not be construed as being limited to the embodiments described herein, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

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

The three-dimensional earthquake-resistant damper according to the present invention consists of a variable case 10 , a main buffer spring 21 , and a guide shaft 40 as shown in FIGS. 1A to 1C .

The variable case 10 includes a lower frame 12 installed on the base surface, and an upper frame 11 separated from the lower frame 12 and installed on the lower frame 12 . 1A to 1C , the upper frame 11 is illustrated in a form containing the lower frame 12 , but contrary to the drawing, even if the lower frame 12 has a structure containing the upper frame 11 , the upper frame 11 ) and the lower frame 12, as long as they are separated from each other, corresponds to the variable case 10 in the earthquake-resistant damper capable of three-dimensional seismic resistance according to the present invention.

The main buffer spring 21 is installed between the upper frame 11 and the lower frame 12 , and acts to absorb vibrations between the upper frame 11 and the lower frame 12 . That is, when vibration due to earthquake is transmitted to the main buffer spring 21 through the base surface and the lower frame 12 installed on the foundation surface, the main buffer spring 21 absorbs the vibration by expansion and contraction action, and the vibration is transmitted to the upper frame ( 11) works to largely remove what is transmitted.

The guide shaft 40 is inserted into the main buffer spring 21 in the vertical direction and penetrates the upper frame 11 and is installed to protrude higher than the upper surface of the upper frame 11, so as to prevent the expansion and contraction of the main buffer spring 21. Accordingly, the upper frame 11 serves to guide the lifting together.

At this time, a spherical ball 42 formed in a spherical shape is provided at the lower end of the guide shaft 40 by expanding the horizontal cross-sectional area of the guide shaft 40 as shown in FIG. 1C .

The spherical ball 42 is a member integrally formed with the guide shaft 40 or rigidly coupled, and is a member formed in a spherical shape as a whole.

As shown in FIG. 1c to correspond to the spherical ball 42, a spherical pocket 141 in which the spherical ball 42 is rotatably nested in place is formed in the upper portion of the lower frame 12.

As such, when the spherical ball 42 is seated inside the spherical pocket 141 so as to be rotatable in place, the guide shaft 40 due to the spherical ball 42 as well as the vertical vibration as shown in FIG. Likewise, since the upper frame 11 can guide the change in the horizontal direction, it is possible to perform a buffering action against vibrations in the horizontal direction.

And as shown in FIG. 1b, a horizontal maintenance spring 31 is installed around the main buffer spring 21 at a point radially symmetrical in the horizontal direction with respect to the center of the main buffer spring 21.

The plurality of leveling springs 31 assist the buffer action of the main buffer spring 21 and at the same time disturb the resonance cycle of the main buffer spring 21 to suppress the development of the vibration period of the main buffer spring 21 into resonance. do.

In addition, by installing the horizontal retaining spring 31 at a radially symmetrical position with respect to the main buffer spring 21, the upper frame 11 is prevented from being excessively tilted to either side when vibration is generated, so that the upper frame 11 ) can be maintained horizontally.

In addition, the horizontal holding spring 31 has a different elastic modulus from the main buffer spring 21, thereby disturbing the resonance period of the main buffer spring 21, explosive vibration and device damage due to resonance can be suppressed. .

In addition, as shown in FIGS. 1B to 1D , in the variable case 10 , the inner upper frame 13 provided on the lower surface of the upper frame 11 and the inner lower frame 14 provided on the upper surface of the lower frame 12 ) This is more installed. Therefore, the spherical pocket 141 may be formed on the upper surface of the inner lower frame.

In particular, when the inner upper and inner lower frames 13 and 14 are installed between the upper frame 11 and the lower frame 12 as described above, between the upper surface of the inner upper frame 13 and the lower surface of the upper frame 11 , the second inner The upper frame 15 is further installed, and between the second inner upper frame 15 and the inner upper frame 13, an auxiliary shock absorber 50 that assists the cushioning action of the main shock absorber spring 21 may be installed. have.

At this time, as shown in FIGS. 2 and 1D and 3C , the inner lower frame 14 and the lower frame 12 may be coupled to each other by a connecting member 33 .

And the auxiliary buffer 50 is coupled to both ends of a plurality of wire rope 51 and the wire rope 51 installed in a curved form as shown in Figure 3a to fix the wire rope 51 It may be made of a rope support block (52). Therefore, vibrations in the vertical and horizontal directions can be additionally absorbed due to the elastic wire rope 51 .

Also, a hole through which the guide shaft 40 can pass is formed in the upper frame 11 as shown in FIG. 3A , and the upper end of the guide shaft 40 protrudes higher than the upper frame 11 . At this time, a screw sector 41 in which a thread is formed is provided on an outer peripheral surface near the upper end of the guide shaft 40 , and a stopper nut 61 having a larger diameter than the diameter of the hole is coupled to the screw sector 41 .

In particular, between the stopper nut 61 and the upper frame 11, as shown in FIG. 3A, a hemispherical flow washer 60 convexly formed toward the hole may be installed.

Accordingly, mutual interference and damage between the hole and the guide shaft 40 and the stopper nut 61 can be prevented when the upper frame 11 is changed relative to the lower frame 12 as shown in FIG. 4A. .

That is, since the flow washer 60 is formed in a hemispherical shape, when the upper frame 11 is changed in the horizontal direction with respect to the lower frame 12 as shown in FIG. 4B , the guide shaft 40 collides with the inner circumferential surface of the hole or It acts as a kind of bearing that prevents it from being damaged by friction or from stiff motion between the guide shaft 40 and the inner circumferential surface of the hole.

On the other hand, since the above-described leveling spring 31 has a different elastic modulus from the main buffering spring 21, it acts to suppress the resonance formation of the main buffering spring 21, but the leveling spring 31 and the main When the moment when the resonance period of the buffer spring 21 coincides with each other occurs, the resonance effect can be amplified rather.

Therefore, in order to prevent this phenomenon, an elastic rope 32 connecting the inner upper frame 13 and the inner lower frame 14 may be installed at the center of the leveling spring 31 .

The elastic rope 32 has its own elastic force, but since the range in which the length is stretched is limited, the upper frame 11 and the lower frame 12 act similarly to a kind of stopper that limits the distance from each other. occurrence can be effectively suppressed.

In addition, although not shown in detail, the elastic rope 32 is made of a wire rope and an elastic tube (not shown) coupled to the wire rope in a form surrounding the surface of the wire rope, so that self-resonance formation can be prevented. can

Meanwhile, between the lower frame 12 and the base surface, as shown in FIG. 5A , a slide member 75 attached to the lower surface of the lower frame 12 and formed convexly toward the base surface, and the upper surface attached to the upper surface of the base surface A displacement control buffer 70 made of a curved plate 71 whose shape is a concave surface having a larger radius of curvature than the slide member 75 may be further provided.

When vibration due to an earthquake occurs, the slide member 75 slides on the upper surface of the curved plate 71, so that the switchboard, which is a facility installed on the upper part of the earthquake-resistant damper capable of three-dimensional seismic resistance according to the present invention, is free for the base surface. can be variable. However, when the vibration of the earthquake is weakened or the vibration is extinguished, the slide member 75 slides down from the upper surface of the curved plate 71 to the center of the lowest height, and returns to the original state of the switchgear.

In addition, a stop jaw 72 is formed on the periphery of the upper surface of the curved plate 71 as shown in FIG. 5A , so that even if the wavelength of vibration in the shear direction is formed large, the slide member 75 moves the stop jaw 72 . Therefore, it is possible to prevent the slide member 75 from deviating from the curved plate 71 as a result.

In particular, as shown in FIGS. 5A and 5B , a fixed hole 73 formed with a constant diameter is formed in the center of the upper surface of the curved plate 71 , so that the slide member 75 and the curved plate 71 are relatively variable to each other. After this, the process of returning the slide member 75 to the center of the curved plate 71 may be facilitated.

In addition, since the slide member 75 can be accurately returned to the center of the curved plate 71 due to the in-place hole 73, contact destruction or contact points that may occur due to displacement due to distortion of the switchboard expected after an earthquake occurs Problems such as defects can be prevented.

However, due to the positioning hole 73 , the slide member 75 can be accurately guided to the center of the curved plate 71 , but when an earthquake occurs, the sliding member 75 is constrained by the positioning hole 73 . There is a problem in that a large vibration is required in order to get out of the fixed state and glide freely.

However, in order for the slide member 75 to accurately land on the center of the curved plate 71 , a substantial portion of the lower portion of the slide member 75 must be able to be inserted into the positioning hole 73 .

Here, in order for the slide member 75 to be accurately seated in the center of the curved plate 71, the positioning hole 73 is larger than a certain size so that the sliding member 75 can be inserted into the positioning hole 73 up to a certain portion. However, in that case, an earthquake may occur and the slide member 75 may not be able to deviate from the fixed position hole 73 even though the slide member 75 should be freely changed on the curved plate 71 .

In the seismic damper capable of three-dimensional seismic resistance according to the present invention, as shown in FIG. 5b , in the in-place hole 75, a variable acceleration spring 742 composed of a leaf spring or a compression spring so that all of these contradictory requests can be resolved. ) and a variable promotion module 74 comprising a contact member 741 connected to the upper end of the variable promotion spring 742 and contacting the surface of the slide member 75 may be installed.

In a situation where vibration in the shear direction is generated by installing the variable facilitation module 74, the sliding member 75 and the contact member 741 are repeatedly collided with each other due to the vibration, causing the sliding member 75 to move into the position hole 73. The process of getting out of it can be facilitated.

That is, when the collision between the slide member 75 and the contact member 741 is repeated, the number of times the contact member 741 collides with the variable acceleration spring 742 is repeated, and in this case, the variable acceleration spring 742 acts as well as its own elastic force. The force due to the reaction is also obtained, and as the self-resonance period is gradually approached, the upward elastic force is increased.

As described above, as the self-elasticity of the variable acceleration spring 742 is increased, at a certain point in time, the variable acceleration spring 742 bounces the slide member 75 higher than the upper portion of the in-place hole 73 via the contact member 741 . be able to pay Accordingly, it is possible to prevent the center of the bottom surface of the slide member 75 from being caught in the positioning hole 73 , which prevents the free movement of the slide member 75 .

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes can be made within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

10: variable case 11: upper frame
12: lower frame 13: inner upper frame
14: inner lower frame 15: second inner upper frame
21: main buffer spring 31: horizontal maintenance spring
32: elastic rope 33: connecting member
34: horizontal spring connection kit 40: guide shaft
41: screw sector 42: spherical ball
50: auxiliary buffer 51: wire rope
52: rope support block 60: floating washer
61: stopper nut 70: displacement control buffer part
71: curved plate 72: stop jaw
73: fixed hole 74: variable acceleration module
75: slide member 131,141: spherical pocket
741: contact member 742: variable acceleration spring

Claims (11)

a variable case comprising a lower frame installed on the base surface and an upper frame installed separately from the lower frame;
a main buffer spring installed between the upper frame and the lower frame;
A guide shaft inserted in the main buffer spring in the vertical direction and installed to protrude higher than the upper surface of the upper frame through the upper frame to guide the upper frame to be lifted together according to the expansion and contraction of the main buffer spring; and ,
The lower end of the guide shaft is provided with a spherical ball formed in a spherical shape by expanding the horizontal cross-sectional area of the guide shaft,
A spherical pocket in which the spherical ball is rotatably nested in place is formed in the upper portion of the lower frame,
When the main buffer spring attenuates vertical or horizontal vibration, the guide shaft can guide both the lifting and lowering of the upper frame and the shearing variable due to the spherical ball,
The variable case is further provided with an inner upper frame provided on the lower surface of the upper frame and an inner lower frame provided on the upper surface of the lower frame,
The spherical pocket is a three-dimensional earthquake-resistant damper, characterized in that formed on the upper surface of the inner lower frame. The method of claim 1,
A plurality of horizontal maintenance springs are installed around the main buffer spring at a point radially symmetrical in the horizontal direction with respect to the center of the main buffer spring,
A plurality of the leveling springs assist the buffering action of the main buffer spring and at the same time disturb the resonance period of the main buffer spring to suppress the resonance of the main buffer spring, and prevent inclination to either side when vibration occurs. A three-dimensional earthquake-resistant damper, characterized in that it maintains the horizontality of the upper frame. delete The method of claim 1,
A second inner upper frame is further installed between the upper surface of the inner upper frame and the lower surface of the upper frame,
A three-dimensional earthquake-resistant damper, characterized in that an auxiliary buffer supporting the buffer action of the main buffer spring is installed between the second inner upper frame and the inner upper frame. 5. The method of claim 4,
The auxiliary buffer unit is a three-dimensional earthquake-resistant damper, characterized in that it consists of a plurality of wire ropes installed in a curved shape, and a rope support block coupled to both ends of the wire rope to fix the wire rope. The method of claim 1,
A hole through which the guide shaft can pass is formed in the upper frame,
A three-dimensional earthquake-resistant damper, characterized in that a stopper nut having a larger diameter than the diameter of the hole is coupled to an upper portion of the guide shaft that protrudes higher than the upper frame. 7. The method of claim 6,
A hemispherical flow washer convexly formed toward the hole is installed between the stopper nut and the upper frame, so that when the upper frame is changed relative to the lower frame, mutual interference between the hole and the guide shaft and the stopper nut and Seismic damper capable of three-dimensional seismic resistance, characterized in that damage is prevented. 3. The method of claim 2,
An elastic rope connecting the inner upper frame and the inner lower frame is installed at the center of the leveling spring,
The elastic rope is a three-dimensional earthquake-resistant damper, characterized in that consisting of a wire rope and an elastic tube coupled to the wire rope in a form surrounding the surface of the wire rope. According to claim 1,
Between the lower frame and the base surface, a slide member attached to the lower surface of the lower frame and formed convexly toward the base surface, and a concave member attached to the upper surface of the base surface and having a larger radius of curvature than the slide member A displacement control buffer made of a curved plate formed of a surface is further provided,
When vibration is generated, a relative change is possible between the variable case and the base surface, but when the vibration is weakened or eliminated, the slide member returns to the center of the lowest upper surface from the upper surface of the curved plate, so that the vibration in the shear direction is absorbed while Seismic damper capable of three-dimensional seismic resistance, characterized in that return to its original state is guaranteed. 10. The method of claim 9,
A stop jaw is formed on the upper edge of the curved plate to prevent the sliding member from deviate from the curved plate,
In the center of the upper surface of the curved plate, a fixed hole formed with a constant diameter is formed, so that the process of returning the sliding member to the center of the curved plate is facilitated after the sliding member and the curved plate are relatively changed. Seismic damper capable of dimensional seismic resistance. 11. The method of claim 10,
A variable accelerating module comprising a variable accelerating spring composed of a leaf spring or a compression spring and a contact member connected to the upper end of the variable accelerating spring and in contact with the surface of the slide member is installed in the fixed hole,
In a situation in which vibration in the shear direction is generated, the process of the sliding member deviating from the fixed hole due to the repeated collision of the sliding member and the contact member is facilitated,
A three-dimensional earthquake-resistant damper, characterized in that the center of the bottom surface of the slide member is caught in the fixed hole, preventing the free variation of the slide member from being disturbed.

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