KR102614720B1 - Switchboard with seismic isolation with dual elastic device - Google Patents

Abstract

The present invention includes an enclosure (6), a base part (10) mounted on both sides of the upper part of the ground, and a body part that is spaced apart from the upper part of the base part (10) and is screwed to both sides of the lower part of the enclosure (6). (15), a stabilizer 20 provided between the base portion 10 and the body portion 15 to attenuate horizontal vibration transmitted to the enclosure 6 when an earthquake occurs, the base portion ( 10) and elastic parts 30, two of which are provided between the stabilizer 20 and the bottom surface of the stabilizer 20, to attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6 when an earthquake occurs. An upper spring holder 35, which is respectively mounted on the front and rear sides and supports the upper end of the elastic portion 30, and is mounted on the front and rear sides of the upper portion of the base portion 10, respectively, and supports the elastic portion 30. It includes a lower spring holder 45 that supports the lower end of the elastic part 30, and the elastic part 30 is provided on the outside of the elastic part 30, so that when an earthquake occurs, the vertical direction is transmitted from the ground to the enclosure 6. Characterized by comprising an external spring 31 for damping vibration and an internal spring 32 provided inside the external spring 31 and coupled to the lower part of the upper spring holder 35 when an earthquake occurs. do.

Description

Switchboard with seismic isolation with dual elastic device {Switchboard with seismic isolation with dual elastic device}

The present invention relates to a switchboard with a seismic isolation function to which a dual elastic device is applied. More specifically, a plurality of elastic parts consisting of an external spring and an internal spring provided inside the external spring are installed between the enclosure and the ground to prevent earthquakes. Accordingly, when the external spring is compressed, the internal spring is fastened to the bottom of the upper spring holder provided in the lower part of the enclosure, and a dual elastic device that can attenuate vibration transmitted from the ground to the enclosure is applied. This relates to a switchboard with a seismic isolation function.

A switchboard refers to a device equipped with switches, instruments, and relays such as relays for the operation or control of power plants, substations, etc., and the operation of electric motors.

There are two types of switchboards: main circuit switchboard and control switchboard. The main switchboard of a commercial or private substation is a main circuit switchboard, and the operation switchboard found in the latest power plants is a control switchboard.

Recently, as large-scale earthquakes have occurred one after another at home and abroad, interest in switchboards with seismic isolation functions has increased, and the price of seismic isolation technology for switchboards has also soared. In particular, since the switchboard is installed on the ground or the floor of a building, it can be directly shocked by external vibrations such as earthquakes.

Seismic isolation technology for switchboards includes a method of protecting facilities by absorbing seismic shock or vibration transmitted to the enclosure using springs, bearings, etc., and a method of withstanding earthquakes by attaching a solid support to the enclosure structure that makes up the switchboard.

However, in existing switchboards, when an earthquake occurs, internal devices such as switches, instruments, and relays inside the switchgear are damaged due to vibration and shock applied to the switchgear due to shaking of the ground, which can lead to enormous losses. there was.

In addition, in existing switchboards, if the switchboard is tilted due to vibrations caused by an earthquake, fires and power outages may occur due to short circuits or disconnections. Insulation breakdown due to insulator cracks can cause serious accidents such as electric shocks and interruption of power supply to power equipment. There was a problem that there could be human and material damage.

Meanwhile, the existing switchboard has the characteristic that the front of the enclosure is relatively heavy and the rear of the enclosure is relatively light. However, in the existing switchgear, regardless of the front and rear of the enclosure, the front left, front right, rear left, and rear right sides of the lower part of the enclosure must be supported with the same spring or bearing, respectively, so when an earthquake occurs, the enclosure is relatively heavy. There was a problem that it was difficult to effectively attenuate the front vibration.

KR 10-1681108 B1

The present invention was created to solve the above problems, and the purpose of the present invention is to install a plurality of elastic parts consisting of an external spring and an internal spring provided inside the external spring between the enclosure and the ground, to prevent earthquakes from occurring. Therefore, when the external spring is compressed, the internal spring is fastened to the bottom of the upper spring holder provided at the bottom of the enclosure, and a switchboard with a seismic isolation function is provided with a dual elastic device that can attenuate vibration transmitted from the ground to the enclosure. .

In addition, the object of the present invention is that when an earthquake occurs, the internal spring provided at a relatively heavy point among the front left, front right, rear left, and rear right of the lower part of the enclosure is first fastened to the bottom of the upper spring holder, so that the lower part of the enclosure The aim is to provide a switchboard with a seismic isolation function equipped with a dual elastic device that can effectively attenuate vibration at relatively high weight points.

In addition, the purpose of the present invention is to provide a switchboard with a seismic isolation function equipped with a stabilizer between the body and the base and a dual elastic device that can attenuate horizontal vibration transmitted from the ground to the enclosure when an earthquake occurs. It is provided.

In order to solve the above technical problems, the switchboard with a seismic isolation function to which the dual elastic device according to the present invention is applied includes an enclosure (6), a base portion (10) mounted on both sides of the upper part of the ground, and the base portion (10). ) and a body portion 15 that is respectively screwed to both sides of the lower part of the enclosure 6 and is provided between the base portion 10 and the body portion 15, so that when an earthquake occurs, the enclosure Two stabilizers (20) are provided between the base part (10) and the stabilizer (20) to attenuate the horizontal vibration transmitted to (6), so that when an earthquake occurs, the stabilizer (20) is provided to prevent vibration from the ground to the enclosure (6). An elastic part 30 that dampens vibration in the vertical direction, an upper spring holder 35 mounted on the front and rear of the bottom of the stabilizer 20 and supporting the top of the elastic part 30, and It includes a lower spring holder 45 that is mounted on the front and rear of the upper part of the base portion 10 and supports the lower end of the elastic portion 30, and the elastic portion 30 includes the elastic portion 30. ) is provided on the outside of the external spring 31 to attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6 when an earthquake occurs, and is provided on the inside of the external spring 31, when an earthquake occurs, It is characterized in that it includes an internal spring 32 coupled to the lower part of the upper spring holder 35.

In addition, the stabilizer 20 is formed to be convex downward in an arcuate shape, has a curved portion 21 screwed to the ground and extends in the front-back direction on both sides of the curved portion 21, respectively, and has an upper surface formed on the body portion ( It is characterized by including a horizontal portion (22) in surface contact with the inner upper surface of 15).

In addition, the upper spring holder 35 is formed on the upper part of the upper spring holder 35, and includes an upper fastening part 36 that supports the upper end of the external spring 31, and a lower part of the upper fastening part 36. A separation prevention part 37 is formed to protrude to prevent the upper end of the external spring 31 from being separated, and a connection part integrally connected to the separation prevention part 37 at the lower part of the separation prevention part 37. (38) and the lower part of the connecting part 38 are integrally connected to the connecting part 38, and when the external spring 31 is compressed due to an earthquake, the lower part is lowered and fastened to the upper end of the internal spring 32. It includes a fastening part 39, and when the outer spring 31 is compressed at the lower part of the lower fastening part 39, a bent part 39a passing through the inside of the upper end of the inner spring 32 is formed to be curved. , the bent portion 39a is located at the top of the inner spring to prevent the inner spring 32 from being separated from the lower fastening portion 39 when the bent portion 39a passes inside the upper end of the inner spring 32 The engaging portion 39b, which is caught between the steel wires of 32), is characterized in that it is formed angled outward.

In addition, the diameter of the upper fastening part 36 is formed to be larger than the outer diameter of the inner spring 32 and smaller than the inner diameter of the outer spring 31 by a preset standard error, and the diameter of the connecting part 38 The diameter is smaller than the inner diameter of the upper internal spring 32, the bent portion 39a is formed in a shape whose diameter decreases from the top to the bottom, and the upper part of the engaging portion 39b has a diameter that decreases from the top to the bottom. An increasing truncated cone-shaped upper protrusion 39b1 is formed, and a truncated cone-shaped lower protrusion 39b2 whose diameter decreases from the top to the bottom is formed at the lower part of the upper protrusion 39b1, and the lower protrusion 39b2 ) is characterized in that the diameter of the upper end is larger than the inner diameter of the inner spring 32 to prevent the inner spring 32 from being separated from the lower fastening portion 39.

In addition, the upper spring holder 35 is lowered in the direction of gravity when the external spring 31 is compressed due to an earthquake, and the connecting portion 38, the engaging portion 39b, and the bending portion 39a are connected to the upper spring 31. When the holder 35 is lowered, it passes inside the upper end of the internal spring 32, and the locking portion 39b is formed when the bent portion 39a passes inside the upper end of the internal spring 32. It is characterized by being caught between the steel wires of the internal spring (32).

In addition, the lower spring holder 45 has a lower end of the external spring 31 fastened to the outer peripheral surface, and the lower spring holder 45 has a through hole 45a where the lower end of the internal spring 32 is fastened to the center of the upper surface. ) is characterized by being formed through.

A switchboard with a seismic isolation function equipped with a dual elastic device according to the present invention is equipped with a plurality of elastic parts consisting of an external spring and an internal spring provided inside the external spring between the enclosure and the ground, so that when the external spring is compressed due to an earthquake, , the internal spring is fastened to the bottom of the upper spring holder provided at the bottom of the enclosure, which has the effect of attenuating vibration in the vertical direction transmitted from the ground to the enclosure.

In addition, in a switchboard with a seismic isolation function equipped with a dual elastic device according to the present invention, when an earthquake occurs, an internal spring provided at a relatively high weight point among the front left, front right, rear left, and rear right of the lower part of the enclosure is used as an upper spring holder. It is first fastened to the bottom of the enclosure, which has the effect of effectively damping vibration in the vertical direction at a relatively heavy point in the lower part of the enclosure.

In addition, the switchboard with a seismic isolation function to which the dual elastic device according to the present invention is equipped with a stabilizer between the body and the base, can effectively attenuate horizontal vibration transmitted from the ground to the enclosure when an earthquake occurs. There is an effect.

Figure 1 is a front view of a switchboard with a seismic isolation function to which a dual elastic device according to the present invention is applied.
Figure 2 is a side view of a switchboard with a seismic isolation function to which the dual elastic device shown in Figure 1 is applied.
Figure 3 is a bottom view of a switchboard with a seismic isolation function to which the dual elastic device shown in Figure 1 is applied.
Figure 4 is a detailed view of symbol A shown in Figure 1.
FIG. 5 is a front cross-sectional view of the lower structure of the switchboard shown in FIG. 4.
Figure 6 is an exploded view of the lower structure of the switchboard.
Figure 7 is a front cross-sectional view of the lower structure of the switchboard when an earthquake occurs.
Figure 8 is a front cross-sectional view of the lower structure of a switchboard with a seismic isolation function to which a dual elastic device equipped with a first spring, a joint, a lower coupling portion, and an internal spring holder is applied.
Figure 9 is a front cross-sectional view of the lower structure of the switchboard shown in Figure 8 when an earthquake occurs.
Figure 10 is a front cross-sectional view of the lower structure of a switchboard with a seismic isolation function to which a dual elastic device equipped with a second spring, a middle part, a lower assembly part, and an inner spring holder is applied.
FIG. 11 is a cross-sectional view of the lower structure of the switchboard shown in FIG. 10 taken along line BB.
FIG. 12 is a front cross-sectional view of the middle and lower assembly views shown in FIG. 10.

Hereinafter, in order to explain the present invention in detail so that a person skilled in the art can easily implement the technical idea of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1 is a front view of the switchboard 5 with a seismic isolation function to which the dual elastic device according to the present invention is applied, and Figure 2 is a side view of the switchboard 5 with a seismic isolation function to which the dual elastic device shown in Figure 1 is applied. 3 is a bottom view of the switchboard 5 with a seismic isolation function to which the dual elastic device shown in FIG. 1 is applied, and FIG. 4 is a detailed view of symbol A shown in FIG. 1.

Referring to Figures 1 to 4, the switchboard 5 with a seismic isolation function to which the dual elastic device according to the present invention is applied includes an enclosure 6, a base part 10, a body part 15, a stabilizer 20, It is composed of an elastic part 30, an upper spring holder 35, and a lower spring holder 45.

First, the interior of the enclosure 6 is provided with electrical equipment that supplies electricity to a specific location.

And, the base portion 10 is mounted on both sides of the upper part of the ground.

At this time, the base portion 10 is formed to be long in the front-back direction in the shape of a U-shaped steel.

In addition, the body portion 15 is provided on the upper part of the base portion 10 to surround the side of the base portion 10 and is screwed to both sides of the lower part of the enclosure 6, respectively.

At this time, the cross-sectional area of the body portion 15 is formed to be larger than the cross-sectional area of the base portion 10. And, the body portion 15 is formed to be long in the front-back direction in the shape of a U-shaped steel.

Additionally, the stabilizer 20 is provided between the base portion 10 and the body portion 15 to attenuate horizontal vibration transmitted to the enclosure 6 when an earthquake occurs.

At this time, the stabilizer 20 is formed in the front-back direction in the shape of a plate having a predetermined thickness.

In addition, two elastic parts 30 are provided between the base part 10 and the stabilizer 20 to attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6 when an earthquake occurs.

At this time, the elastic portion 30 is formed to be compressible or expandable.

Additionally, the upper spring holder 35 is mounted on the front and rear sides of the bottom of the stabilizer 20, respectively, and supports the upper end of the elastic portion 30.

Additionally, a plurality of lower spring holders 45 are mounted at the front and rear of the upper portion of the base portion 10, respectively, to support the lower end of the elastic portion 30. At this time, the lower spring holder 45 is formed in a cylindrical shape.

1 to 3, the stabilizer 20 includes a curved portion 21 and a horizontal portion 22.

First, the curved portion 21 is formed to be convex downward in an arch shape and is screwed to the ground.

In addition, the horizontal portion 22 is formed to extend in the front-back direction on both sides of the curved portion 21, and the upper surface of the horizontal portion 22 is in surface contact with the inner upper surface of the body portion 15.

FIG. 5 is a front cross-sectional view of the lower structure of the switchboard shown in FIG. 4, and FIG. 6 is an exploded view of the lower structure of the switchboard.

Referring to Figures 5 and 6, the elastic part 30 includes an external spring 31 and an internal spring 32.

First, the external spring 31 is provided on the outside of the elastic part 30 to attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6 when an earthquake occurs.

At this time, the external spring 31 is formed in the shape of a coil spring that can be compressed or expanded.

And, the internal spring 32 is provided inside the external spring 31.

At this time, the internal spring 32 is formed in the shape of a coil spring that can be compressed or expanded. And, the outer diameter of the inner spring 32 is smaller than the inner diameter of the outer spring 31.

Meanwhile, the upper spring holder 35 includes an upper fastening part 36, a separation prevention part 37, a connecting part 38, and a lower fastening part 39.

First, the upper fastening portion 36 is formed on the upper part of the upper spring holder 35 and supports the upper end of the external spring 31.

At this time, the upper fastening portion 36 is cylindrical and is formed in the vertical direction. Additionally, the diameter of the upper fastening portion 36 is formed to be larger than the outer diameter of the inner spring 32 and smaller than the inner diameter of the outer spring 31 by a preset standard error.

Additionally, the separation prevention portion 37 protrudes outward from the lower portion of the upper fastening portion 36 and serves to prevent the upper end of the external spring 31 from being separated.

At this time, the outermost diameter of the separation prevention part 37 is formed to be larger than the diameter of the upper fastening part 36.

And, the connection part 38 is connected to the lower part of the upper fastening part 36 integrally with the upper fastening part 36.

At this time, the connection portion 38 is formed in a cylindrical shape in the vertical direction. Additionally, the diameter of the connecting portion 38 is formed to be smaller than the inner diameter of the internal spring 32.

In addition, the lower fastening part 39 is integrally connected to the connecting part 38 at the lower part of the connecting part 38, and when the external spring 31 is compressed due to an earthquake, it descends and fastens to the upper end of the internal spring 32. do.

Meanwhile, when the external spring 31 is compressed, a bent portion 39a passing through the inside of the upper end of the internal spring 32 is formed at the lower part of the lower fastening part 39 to be curved. At this time, the bent portion 39a is formed in a shape whose diameter decreases from the top to the bottom.

In addition, at the upper part of the bent portion 39a, there is a space between the steel wires of the inner spring 32 to prevent the inner spring 32 from escaping from the lower fastening portion 39 when the bent portion 39a passes inside the upper end of the inner spring 32. The locking portion 39b is formed to be angled outward. At this time, the outer surface of the locking portion (39b) is formed angularly in the shape of a “>” symbol, and the outermost diameter of the locking portion (39b) prevents the inner spring (32) from escaping from the lower fastening portion (39). It is formed larger than the inner diameter of the internal spring 32.

Referring to FIG. 5, a truncated cone-shaped upper protrusion 39b1 whose diameter increases from the top to the bottom is formed on the upper part of the locking portion 39b.

And, a truncated cone-shaped lower protrusion 39b2 whose diameter decreases from the top to the bottom is formed at the lower part of the upper protrusion 39b1.

At this time, the diameter of the upper end of the lower protrusion 39b2 is formed to be larger than the inner diameter of the internal spring 32 to prevent the internal spring 32 from being separated from the lower fastening part 39.

Figure 7 is a front cross-sectional view of the lower structure of the switchboard when an earthquake occurs.

Referring to FIG. 7, when the external spring 31 is compressed due to an earthquake, the upper spring holder 35 descends in the direction of gravity.

Then, when the upper spring holder 35 is lowered, the connecting portion 38, the locking portion 39b, and the bending portion 39a of the upper spring holder 35 descend and pass through the inside of the upper end of the internal spring 32, respectively. do.

And, when the bent portion 39a passes inside the upper end of the inner spring 32, the locking portion 39b is caught between the steel wires of the inner spring 32, and the inner spring 32 is attached to the upper spring holder 35. It is fastened to the lower fastening part (39).

Because of this, the internal spring 32 can more effectively attenuate vibration transmitted from the ground to the enclosure 6 when an earthquake occurs.

Meanwhile, the lower end of the external spring 31 is fastened to the outer peripheral surface of the lower spring holder 45.

Additionally, a through hole 45a through which the lower end of the internal spring 32 is fastened is formed in the center of the upper surface of the lower spring holder 45. At this time, the cross section of the through hole 45a is formed in a circular shape.

Figure 8 shows the lower structure of the switchboard 5 with a seismic isolation function to which a dual elastic device equipped with a first spring 33, a joint portion 40, a lower coupling portion 41, and an internal spring holder 50 is applied. It is a front cross-sectional view, and FIG. 9 is a front cross-sectional view of the lower structure of the switchboard 5 shown in FIG. 8 when an earthquake occurs.

Referring to Figures 8 and 9, the switchboard 5 with a seismic isolation function to which the dual elastic device according to the present invention is applied may be configured to further include an internal spring holder 50.

First, the internal spring holder 50 is provided inside the lower spring holder 45. At this time, the internal spring holder 50 is formed in a cylindrical shape.

Meanwhile, the elastic portion 30 may further include a first spring 33.

First, the first spring 33 is provided inside the internal spring 32.

At this time, the first spring 33 is formed in the shape of a coil spring that can be compressed or expanded. Also, the outer diameter of the first spring 33 is smaller than the inner diameter of the inner spring 32.

Meanwhile, the lower end of the internal spring 32 is fastened to the outer peripheral surface of the internal spring holder 50.

In addition, a coupling hole 50a into which the lower end of the first spring 33 is fastened is formed through the center of the upper surface of the internal spring holder 50. At this time, the cross section of the coupling hole 50a is formed in a circular shape.

Meanwhile, the upper spring holder 35 may further include a joint portion 40 and a lower coupling portion 41.

First, the joint portion 40 is integrally connected to the lower part of the lower fastening portion 39.

At this time, the joint portion 40 is formed in a cylindrical shape in the vertical direction. And, the diameter of the joint 40 is formed to be smaller than the inner diameter of the first spring 33.

In addition, the lower coupling part 41 is integrally connected to the lower part of the coupling part 40, and after the internal spring 32 is fastened to the lower coupling part 39, due to the occurrence of an earthquake. When the internal spring 32 is compressed, it descends and is fastened to the top of the first spring 33.

After the inner spring 32 is fastened to the lower fastening part 39, when the inner spring 32 is compressed due to an earthquake, the lower fastening part 41 is fastened between the upper steel wires of the first spring 33. , the first spring 33 can further attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6.

Meanwhile, when the first spring 33 is compressed, a bent portion 41a passing through the inside of the upper end of the first spring 33 is formed at the lower part of the lower coupling portion 41 to be curved. At this time, the bent portion 41a is formed in a shape whose diameter decreases from the top to the bottom.

In addition, at the upper part of the bent part 41a, a first spring ( The straddling portion 41b, which is caught between the steel wires of 33), is formed to be angled outward. At this time, the outer surface of the straddle portion (41b) is formed angularly in the shape of a “>” symbol, and the outermost diameter of the straddle portion (41b) is such that the first spring 33 does not deviate from the lower coupling portion 41. It is formed to be larger than the inner diameter of the first spring 33.

Referring to Figures 8 and 9, an upper protrusion 41b1 in the shape of a truncated cone whose diameter increases from the top to the bottom is formed on the upper part of the straddling portion 41b.

And, a truncated cone-shaped lower protrusion 41b2 whose diameter decreases from the top to the bottom is formed at the lower part of the upper protrusion 41b1.

At this time, the diameter of the upper end of the lower protrusion 41b2 is formed to be larger than the inner diameter of the first spring 33 to prevent the first spring 33 from being separated from the lower coupling portion 41.

Figure 10 shows the lower structure of the switchboard 5 with a seismic isolation function to which a dual elastic device equipped with a second spring 34, a middle part 42, a lower assembly part 43, and an inner spring holder 55 is applied. It is a front cross-sectional view, and FIG. 11 is a cross-sectional view taken along line BB of the lower structure of the switchboard shown in FIG. 10, and FIG. 12 is a front cross-sectional view of the middle part 42 and the lower assembly view shown in FIG. 10.

Referring to FIGS. 10 to 12, the switchboard 5 having a seismic isolation function to which the dual elastic device according to the present invention is applied may be configured to further include an inner spring holder 55.

First, a plurality of inner spring holders 55 are provided inside the lower spring holder 45 in the circumferential direction. At this time, the inner spring holder 55 is formed in a cylindrical shape.

Additionally, a fastening hole 55a is formed through the center of the upper surface of the inner spring holder 55. At this time, the cross section of the fastening hole 55a is formed in a circular shape.

Meanwhile, the elastic portion 30 may further include a second spring 34.

First, the lower end of the second spring 34 is fastened to the fastening hole 55a of the inner spring holder 55.

At this time, the second spring 34 is formed in the shape of a coil spring that can be compressed or expanded. Also, the outer diameter of the second spring 34 is smaller than the inner diameter of the inner spring 32.

Meanwhile, the upper spring holder 35 may further include a middle portion 42 and a lower assembly portion 43.

First, a plurality of middle portions 42 are provided in the circumferential direction at the lower portion of the lower fastening portion 39.

At this time, the middle portion 42 is cylindrical and is formed in the vertical direction. Additionally, the diameter of the middle portion 42 is formed to be smaller than the inner diameter of the second spring 34.

In addition, the lower assembly part 43 is connected to the lower part of the middle part 42 integrally with the middle part 42, and after the internal spring 32 is fastened to the lower fastening part 39, due to the occurrence of an earthquake. When the internal spring 32 is compressed, it descends and is fastened to the upper end of the second spring 34.

After the internal spring 32 is fastened to the lower fastening part 39, when the internal spring 32 is compressed due to an earthquake, the lower assembly part 43 is fastened between the upper steel wires of the second spring 34. , the second spring 34 can further attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6.

Meanwhile, when the second spring 34 is compressed, a curved surface 43a passing through the inside of the upper end of the second spring 34 is formed to be curved in the lower part of the lower assembly portion 43. At this time, the curved surface 43a is formed in a shape whose diameter decreases from the top to the bottom.

In addition, a second spring ( The wedge portion 43b caught between the steel wires of 34) is formed to be angled outward. At this time, the outer surface of the wedge portion 43b is formed angularly in the shape of a “>” symbol, and the outermost diameter of the wedge portion 43b is such that the second spring 34 does not escape from the lower assembly portion 43. It is formed to be larger than the inner diameter of the second spring 34.

Referring to FIGS. 10 to 12 , a truncated cone-shaped upper end portion 43b1 whose diameter increases from the top to the bottom is formed at the top of the wedge portion 43b.

In addition, a truncated cone-shaped lower end portion 43b2 whose diameter decreases from the top to the bottom is formed at the lower part of the upper end portion 43b1.

At this time, the diameter of the upper end of the lower end portion 43b2 is formed to be larger than the inner diameter of the second spring 34 to prevent the second spring 34 from being separated from the lower assembly portion 43.

A switchboard with a seismic isolation function to which a dual elastic device according to the present invention is applied has an elastic portion consisting of an external spring 31 between the enclosure 6 and the ground and an internal spring 32 provided inside the external spring 31. (30) is mounted in multiple numbers, so that when the external spring (31) is compressed due to an earthquake, the internal spring (32) is fastened to the bottom of the upper spring holder (35) provided in the lower part of the enclosure (6), thereby lifting the enclosure from the ground. It has the effect of attenuating vibration in the vertical direction transmitted to (6).

In addition, the switchboard with a seismic isolation function equipped with a dual elastic device according to the present invention has an internal spring ( 32) is first fastened to the bottom of the upper spring holder 35, which has the effect of effectively attenuating vibration in the vertical direction at a relatively heavy point in the lower part of the enclosure 6.

In addition, the switchboard with a seismic isolation function equipped with a dual elastic device according to the present invention is provided with a stabilizer 20 between the body part 15 and the base part 10, so that when an earthquake occurs, the enclosure 6 is lifted from the ground. It has the effect of effectively attenuating horizontal vibration transmitted to the .

5: Switchboard with seismic isolation function with dual elastic device
6: Enclosure
10: Base part
15: Body part
20: Stabilizer
21: curved portion
22: horizontal part
30: elastic part
31: external spring
32: internal spring
33: first spring
34: second spring
35: Upper spring holder
36: upper fastening part
37: Breakaway prevention unit
38: connection
39: lower fastening part
39a: bend
39b: latching portion
39b1: upper protrusion
39b2: lower protrusion
40: joint
41: lower coupling part
41a: bend part
41b: straddle part
41b1: upper protrusion
41b2: lower protrusion
42: middle part
42: lower assembly part
43a: curved surface
43b: wedge portion
43b1: upper distal part
43b2: lower distal portion
45: Lower spring holder
45a: Through hole
50: Internal spring holder
50a: coupling hole
55: Inner spring holder
55a: fastening hole

Claims (6)

Enclosure (6);
Base portions 10 mounted on both sides of the upper part of the ground;
a body portion (15) spaced apart from the upper portion of the base portion (10) and screwed to both sides of the lower portion of the enclosure (6);
A stabilizer (20) provided between the base portion (10) and the body portion (15) to attenuate horizontal vibration transmitted to the enclosure (6) when an earthquake occurs;
Two elastic parts (30) are provided between the base part (10) and the stabilizer (20) to attenuate vibration in the vertical direction transmitted from the ground to the enclosure (6) when an earthquake occurs;
an upper spring holder (35) mounted on the front and rear sides of the bottom of the stabilizer (20), respectively, to support the upper end of the elastic portion (30); and
A lower spring holder 45 is mounted on the front and rear of the upper part of the base part 10 and supports the lower end of the elastic part 30,
The elastic part 30 is
An external spring 31 provided on the outside of the elastic part 30 to attenuate vibration in the vertical direction transmitted from the ground to the enclosure 6 when an earthquake occurs; and
An internal spring 32 is provided inside the external spring 31 and is coupled to the lower part of the upper spring holder 35 when an earthquake occurs,
The upper spring holder 35 is
an upper fastening portion 36 formed on the upper spring holder 35 to support the upper end of the external spring 31;
a separation prevention portion 37 protruding from the lower portion of the upper fastening portion 36 to prevent the upper end of the external spring 31 from being separated;
A connecting portion 38 integrally connected to the separation prevention portion 37 at a lower portion of the separation prevention portion 37; and
A lower fastening part 39 is integrally connected to the lower part of the connecting part 38 and is lowered and fastened to the upper end of the internal spring 32 when the external spring 31 is compressed due to an earthquake. ); Including,
The lower fastening part 39 is
When the outer spring 31 is compressed at the lower part, a bent portion 39a passing through the inner side of the upper end of the inner spring 32 is formed to be curved,
The bent portion (39a) is
When the bent portion 39a at the upper part passes inside the upper end of the inner spring 32, it hangs between the steel wires of the inner spring 32 to prevent the inner spring 32 from escaping from the lower fastening portion 39. A switchboard with a seismic isolation function applied with a dual elastic device, characterized in that the locking portion (39b) is formed at an angle to the outside. According to clause 1,
The stabilizer 20 is
A curved portion 21 is formed to be convex downward in an arch shape and is screwed to the ground; and
A horizontal portion (22) extending in the front-back direction on both sides of the curved portion (21) and having an upper surface in surface contact with the inner upper surface of the body portion (15). Switchboard with functions. delete According to clause 1,
The diameter of the upper fastening part 36 is
It is formed to be larger than the outer diameter of the inner spring 32 and smaller than the inner diameter of the outer spring 31 by a preset reference error,
The diameter of the connection part 38 is
It is formed smaller than the inner diameter of the upper internal spring 32,
The bent portion (39a) is
It is formed in a shape where the diameter decreases from the top to the bottom,
At the top of the catching portion (39b)
A truncated cone-shaped upper protrusion 39b1 whose diameter increases from the top to the bottom is formed,
At the bottom of the upper protrusion 39b1
A truncated cone-shaped lower protrusion 39b2 whose diameter decreases from the top to the bottom is formed,
The diameter of the upper end of the lower protrusion 39b2 is
A switchboard with a seismic isolation function equipped with a dual elastic device, characterized in that the inner diameter of the inner spring (32) is formed larger than the inner diameter of the inner spring (32) to prevent the inner spring (32) from being separated from the lower fastening portion (39). According to clause 1,
The upper spring holder 35 is
When the external spring 31 is compressed due to an earthquake, it falls in the direction of gravity,
The connecting portion 38, the engaging portion 39b and the bending portion 39a are
When the upper spring holder 35 is lowered, it passes inside the upper end of the inner spring 32, respectively,
The catching portion (39b) is
A switchboard with a seismic isolation function equipped with a dual elastic device, characterized in that the bent portion (39a) is caught between the steel wires of the inner spring (32) when it passes inside the upper end of the inner spring (32). According to clause 1,
The lower spring holder 45 is
The lower end of the external spring 31 is fastened to the outer peripheral surface,
The lower spring holder 45 is
A switchboard with a seismic isolation function equipped with a dual elastic device, characterized in that a through hole (45a) into which the lower end of the internal spring (32) is fastened is formed in the center of the upper surface.