KR102367459B1 - Earthquake resistance structure with earthquake detection function, distributing board having the same and control method thereof - Google Patents

Abstract

Disclosed are an earthquake-resistant structure having an earthquake motion detection function, a distribution/incoming board assembly including the same, and a controlling method thereof, capable of detecting an earthquake, and simultaneously, ensuring safety of a distribution/incoming board. The earthquake-resistant structure having the earthquake motion detection function of detecting an earthquake motion and configured to buffer the earthquake motion acting on the distribution/incoming board includes: a damper body part having a cylinder part having a circular hollow; a lower damper washer unit including a plurality of damper washers having a donut shape and disposed in the hollow; a damper piston including a shaft member having a predetermined length and a stepped sill member protruding outward from a middle portion of the shaft member, inserted into the hollow, and passing through the lower damper washer unit so as to be exposed through a hole formed in a bottom portion of the damper body part; an upper damper washer unit including a plurality of damper washers having a donut shape, inserted into the hollow, and disposed on the stepped sill member of the damper piston; a damper cover part disposed on the damper body part to pressurize the upper damper washer unit, and configured to expose the shaft member by a predetermined height through a hole formed in a central portion of the damper cover part; a first piezoelectric element having a donut shape, fitted to an upper portion of the shaft member, disposed between the upper damper washer unit and the damper cover part, and configured to sense a vertical earthquake motion applied by an earthquake; and a second piezoelectric element having a flexible band shape, disposed between the upper damper washer unit and the damper piston, and configured to sense a horizontal earthquake motion generated according to a pressure applied by the earthquake.

Description

An earthquake-resistant structure having an earthquake detection function, a switchgear assembly having the same, and a control method thereof

The present invention relates to an earthquake-resistant structure having a seismic motion detection function, a switchgear assembly having the same, and a control method thereof, and more particularly, to uniformly reduce shock and vibration transmitted from the outside due to an earthquake, while securing the safety of the switchgear. The present invention relates to an earthquake-resistant structure having a seismic motion detection function capable of simultaneously sensing an earthquake, a switchgear assembly having the same, and a method for controlling the same.

In general private electric equipment, a high voltage of 3,300V or 6,600V must be received from the distribution line of the substation and converted back to commercial voltage. No, but the device that makes this possible is the switchboard.

This switchgear includes a power receiving facility for receiving high voltage and extra high voltage supplied from the substation, a substation facility for stepping down the high voltage and extra high voltage received from the substation into a commercial voltage, and electric equipment or lighting for each part of the building. It includes a case for accommodating the power distribution facility and the power receiving facility, the substation facility and the distribution facility for supplying to the ground, and is generally fixed to the ground. Therefore, in the conventional switchgear, mechanical vibration or vibration caused by an earthquake is transmitted to the switchgear as it is.

In recent years, large and small earthquakes in various regions of the world have caused numerous human and national damage, and since such signs are occurring in Korea, which was classified as a relatively safe zone, seismic design for switchgear is necessary.

In consideration of this, a piston is realized by disposing damper washers of different diameters to control the internal air flow, and an earthquake-resistant structure in the form of a cylinder in which the piston is accommodated has been developed and is being applied by being disposed between the switchboard and the ground (patent registration) 10-1608689).

On the other hand, in order to detect an earthquake, an acceleration sensor that detects the magnitude and direction of vibration acceleration with respect to vibration energy generated by the earthquake and transmits a corresponding detection signal must be separately installed outside the switchgear.

Korean Patent No. 10-1608689 (registered on March 29, 2016) (Title of the invention: earthquake-resistant structure) Korean Patent Registration No. 10-1379224 (Registered on March 24, 2014) (Title of the invention: Cylindrical seismic device using orifice piston structure) Korean Patent No. 10-0476439 (Registered on Mar. 03, 2005) (Title of Invention: Seismic Device for Building Structures) Korean Patent No. 10-1546074 (registration on August 13, 2015) (Title of the invention: earthquake detection and diagnosis system for structures using 3-axis acceleration signals)

Accordingly, the technical problem of the present invention is based on this point, and it is an object of the present invention to uniformly reduce the shock and vibration transmitted from the outside due to the occurrence of an earthquake to secure the safety of the switchgear while simultaneously detecting the earthquake. It is to provide an earthquake-resistant structure having a sensing function.

Another object of the present invention is to provide a switchgear assembly having the earthquake-resistant structure described above.

Another object of the present invention is to provide a method for controlling the above-described switchgear assembly.

According to one embodiment, in order to realize the object of the present invention, an earthquake-resistant structure having a function of buffering earthquake motion acting on a switchgear and detecting the earthquake motion includes: a damper body part having a circular hollow cylinder part; a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow; a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion; an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston; a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part; a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and a second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by the earthquake.

In an embodiment, a plurality of protrusions may be formed on an upper surface of the upper damper washer to contact the first piezoelectric element.

In an embodiment, a plurality of protrusions may be formed on a lower surface of the damper cover to contact the first piezoelectric element.

In an embodiment, a plurality of protrusions may be formed on each of the upper surface of the upper damper washer part and the lower surface of the damper cover part, and the first piezoelectric element may be disposed between the protrusions facing each other.

In an embodiment, a plurality of protrusions may be formed on an inner surface of the lower damper washer to contact the second piezoelectric element.

In an embodiment, a plurality of protrusions may be formed on a side surface of the damper piston to contact the second piezoelectric element.

In an embodiment, a plurality of protrusions may be formed on an inner surface of the upper damper washer part and an outer surface of the damper piston, respectively, and the second piezoelectric element may be disposed between the protrusions facing each other.

In order to achieve another object of the present invention, a switchgear assembly according to an embodiment includes a switchboard including a case, a door configured on a side surface of the case to open and close, and an electric device installed inside the case; an upper bracket disposed along one side of the bottom of the switchboard; a lower bracket disposed along the upper bracket and fitted to the upper bracket; and an earthquake-resistant structure installed between the upper bracket and the lower bracket to buffer vertical and horizontal vibrations acting on the switchgear, and to sense the vertical and horizontal vibrations, the earthquake-resistant structure having a circular shape a damper body part having a hollow cylinder part; a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow; a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion; an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston; a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part; a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and a second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by the earthquake.

In one embodiment, the first piezoelectric element outputs a first piezoelectric signal according to the vertical earthquake motion, the second piezoelectric element outputs a second piezoelectric signal according to the horizontal earthquake motion, and the switchgear having the earthquake motion detection function The assembly may include: a piezoelectric signal converter converting each of the first piezoelectric signal and the second piezoelectric signal to output a vertical shockwave signal and a horizontal shockwave signal; a seismic intensity class storage unit for storing the summation signal for each seismic intensity class; a seismic class judging unit for determining a seismic intensity class of an earthquake motion by inquiring the sum signal from the intensity class storage unit in response to the sum signal obtained by adding the vertical shock wave signal and the horizontal shock wave signal; and a switchgear operation control unit configured to trip-link a circuit breaker provided in the switchgear according to the progress class determined by the progress class determination unit to prevent damage to the switchgear.

In one embodiment, the piezoelectric signal converter, a first amplifier for amplifying the first piezoelectric signal; a first filter for removing a noise component from the first piezoelectric signal amplified by the amplifier; a second amplifier for amplifying the second piezoelectric signal; and a second filter for removing a noise component from the second piezoelectric signal amplified by the second amplifier.

In one embodiment, the piezoelectric signal converter, a first buffer for buffering the signal from which the noise has been removed by the first filter and providing it to the progress class determination unit; and a second buffer buffering the signal from which the noise has been removed by the second filter and providing the buffered signal to the progress class determination unit.

In order to achieve another object of the present invention, a control method of a switchgear assembly according to an embodiment includes (a) a damper body portion having a circular hollow cylinder portion, and a plurality of damper washers having a donut shape, wherein the It has a lower damper washer part disposed in the hollow, a shaft member having a predetermined length, and a stepped member protruding outward from a middle part of the shaft member, inserted into the hollow and penetrating the lower damper washer part, the bottom of the damper body part An upper damper washer part including a damper piston exposed to a hole formed in the part, a plurality of damper washers having a donut shape, inserted into the hollow and disposed on a stepped member of the damper piston; A damper cover part pressing the upper damper washer part and exposing the shaft member by a certain height through a hole formed in the center part, has a donut shape and is fitted on the shaft member upper part and is disposed between the upper damper washer part and the damper cover part a first piezoelectric element for sensing vertical seismic motion applied by an earthquake, a flexible band shape, disposed between the upper damper washer and the damper piston, and horizontal seismic motion generated according to the pressure applied by the earthquake Installing an earthquake-resistant structure including a second piezoelectric element for sensing between the upper bracket disposed along one side of the bottom of the switchboard and the lower bracket disposed along the upper bracket and fitted into the upper bracket; (b) when a first piezoelectric signal is received from the first piezoelectric element, generating a vertical shock wave signal based on the first piezoelectric signal; (c) when a second piezoelectric signal is received from the second piezoelectric element, generating a horizontal shock wave signal based on the second piezoelectric signal; and (d) differentially controlling the operation of the switchboard based on the vertical shock wave signal and the horizontal shock wave signal.

In one embodiment, the step (b) comprises: (b-1) amplifying the first piezoelectric signal; and (b-2) removing noise from the amplified first piezoelectric signal to generate the vertical shock wave signal.

In one embodiment, the step (c) comprises: (c-1) amplifying the second piezoelectric signal; and (c-2) removing noise from the amplified second piezoelectric signal to generate the horizontal shock wave signal.

In an embodiment, the step (d) includes: (d-1) generating a sum signal by adding the vertical shock wave signal and the horizontal shock wave signal; (d-2) deriving an MM scale by inquiring a seismic class corresponding to the summed signal generated in step (d-1) in a seismic class storage unit that stores the summed signals for each seismic motion class; and (d-3) differentially controlling the operation of the switchboard in response to the inquired MM scale.

According to the earthquake-resistant structure having such an earthquake detection function, a switchgear assembly having the same, and a control method thereof, in addition to the configuration for buffering the earthquake motion acting on the switchboard, piezoelectric elements for additionally detecting vertical and horizontal earthquakes are placed in the earthquake-resistant structure, By uniformly reducing the shock and vibration transmitted from the outside due to the occurrence of an earthquake, it is possible to secure the safety of the switchgear while simultaneously detecting the earthquake. In particular, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first piezoelectric element for additionally sensing vertical earthquake motion is combined with the upper damper washer part of the earthquake-resistant structure By arranging between the damper cover parts and arranging the second piezoelectric element for sensing horizontal seismic motion between the side surface of the shaft member of the damper piston of the earthquake-resistant structure and the upper damper washer part, the shock and vibration transmitted from the outside due to the occurrence of an earthquake It is possible to detect earthquake motion at the same time while securing the safety of various switchboards such as switchboards, closed switchboards, high voltage switchboards, low voltage switchboards, control boards, and distribution boards.

1 is a perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to the present invention.
Figure 2 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to an embodiment of the present invention.
3 is a cross-sectional view for explaining the earthquake-resistant structure having an earthquake-motion detection function shown in FIG.
4 is an exploded perspective view illustrating a second flexible piezoelectric element.
5 is a block diagram illustrating a control system of a switchgear facility using an earthquake-resistant structure having an earthquake detection function according to an embodiment of the present invention.
6 is a circuit diagram for explaining an example of the rectifying unit shown in FIG.
FIG. 7 is a circuit diagram for explaining an example of the conversion circuit shown in FIG. 5 .
8 is an exploded perspective view illustrating an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention.
9 is a cross-sectional view for explaining an earthquake-resistant structure having an earthquake detection function shown in FIG.
10 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention.
11 is a cross-sectional view for explaining an earthquake-resistant structure having a seismic motion detection function shown in FIG.
12 is an exploded perspective view illustrating an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention.
13 is a cross-sectional view for explaining an earthquake-resistant structure having an earthquake detection function shown in FIG. 12 .
14 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention.
FIG. 15 is a cross-sectional view illustrating an earthquake-resistant structure having an earthquake-motion detection function shown in FIG. 14 .
16 is an exploded perspective view illustrating a switchgear assembly having an earthquake-resistant structure according to an embodiment of the present invention.
17 is a block diagram illustrating an operation control system of a switchgear assembly having a seismic motion detection function according to an embodiment of the present invention.
18 is a circuit diagram for explaining the piezoelectric signal converter shown in FIG. 17 .
19 is a flowchart illustrating an operation control method of a switchgear assembly having a seismic motion detection function according to an embodiment of the present invention.
FIG. 20 is a flowchart for explaining a step of generating the vertical shock wave signal shown in FIG. 19 .
21 is a flowchart for explaining a step of generating the horizontal shock wave signal shown in FIG. 19 .
22 is a flowchart for explaining the step of differentially controlling the operation of the switchboard based on the vertical shock wave signal and the horizontal shock wave signal shown in FIG. 19 .

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. Since the present invention can have various changes and can have various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing each figure, like reference numerals have been used for like elements. In the accompanying drawings, the dimensions of the structures are enlarged than the actual size for clarity of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprise" or "have" are intended to designate that a feature, number, step, operation, component, part, or a combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In this specification, although the term switchgear is typically used, it can be equally applied to a closed switchboard, a high voltage switchboard, a low voltage switchboard, a control board, a switchboard, and the like. Similarly, although a switchgear assembly including a switchboard is representatively described, a closed switchboard assembly including a closed switchboard, a high voltage switchboard assembly including a high voltage switchboard, a low voltage switchboard assembly including a low voltage switchboard, a control panel assembly including a control panel, The same can be applied to a distribution board assembly including a distribution board.

1 is a perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to the present invention. Figure 2 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to an embodiment of the present invention. 3 is a cross-sectional view for explaining the earthquake-resistant structure having an earthquake-motion detection function shown in FIG.

1 to 3, the earthquake-resistant structure 100 having a seismic motion detection function according to an embodiment of the present invention includes the bottom part of various switchboards such as a switchgear, a closed switchboard, a high-pressure switchboard, a low-voltage switchboard, a control board, and a switchboard; Installed between the ground and buffer body part 110, lower damper washer part 120, damper piston 130, upper damper washer part 140 in order to buffer impact force or earthquake motion acting on the switchboard and detect earthquake motion, It includes a damper cover part 150 , a fastening part 160 , a first piezoelectric element 170 and a second piezoelectric element 180 . In the present embodiment, the first piezoelectric element 170, which is a ring-type piezoelectric element, is disposed between the lower damper washer part 120 and the damper piston 130, and the second piezoelectric element 180 is hollow inside the inner surface and the lower damper. An example arranged between the washer parts 120 is shown.

The damper body part 110 includes a cylinder part 112 having a circular hollow shape, a first wing part 114 formed on one side of the cylinder part 112 , and a second wing part 116 formed on the other side of the cylinder part 112 . ) has The cylinder part 112 may have a cylindrical shape, and a hollow is formed therein. A hollow hole having a size smaller than the diameter of the hollow formed therein is formed in the bottom of the cylinder part 112 . A first body fastening hole 112a, a second body fastening hole 112b, a third body fastening hole 112c, and a fourth body fastening hole 112d are formed in the upper portion of the cylinder part 112 .

The lower damper washer part 120 has a donut shape and is disposed in the hollow of the cylinder part 112 . The lower damper washer unit 120 includes a first damper washer 122 having a donut shape and disposed in the hollow of the cylinder unit 112 , and a second damper washer having a donut shape and disposed on the first damper washer 122 . (124).

In this embodiment, the diameter of the inner hole of the first damper washer 122 may be different from the diameter of the inner hole of the second damper washer 124 . That is, the diameter of the inner hole of the first damper washer 122 may be larger than the diameter of the inner hole of the second damper washer 124 . Meanwhile, the diameter of the inner hole of the first damper washer 122 may be smaller than the diameter of the inner hole of the second damper washer 124 . Accordingly, when the first damper washer 122 and the second damper washer 124 are disposed in the hollow of the damper body 110 , a predetermined space may be formed. The formed space may serve to buffer impact force or vibration. For example, the impact force or vibration transmitted from the lower portion is vertically absorbed by each of the first damper washer 122 and the second damper washer 124 and is horizontally absorbed by the above-described predetermined space. Accordingly, even if a cushioning material made of a material such as oil is not injected into the cylinder, the air in the formed space serves as a cushioning material. Therefore, oil leakage does not occur.

The damper piston 130 has a shaft member 132 of a certain length having a thread therein, and a stepped member 134 formed between the lower end of the shaft member 132 and the middle portion of the shaft member 132, and the cylinder part ( It is inserted into the hollow of the 112 and penetrates the lower damper washer part and is exposed to a hole formed in the bottom part of the damper body part 110 . The upper damper washer part 140 has a donut shape, is inserted into the hollow of the cylinder part 112 , and is disposed on the stepped member 134 of the damper piston 130 . The upper damper washer part 140 has a donut shape, is inserted into the hollow of the cylinder part 112, and is disposed on the stepped member 134 of the damper piston 130. A third damper washer 142 and a donut shape, and a fourth damper washer 144 inserted into the hollow of the cylinder part 112 and fitted to the shaft member 132 of the damper piston 130 and disposed on the third damper washer 142 .

In this embodiment, the diameter of the third damper washer 142 may be smaller than the diameter of the fourth damper washer 144 . Accordingly, when the third damper washer 142 and the fourth damper washer 144 are disposed in the hollow of the damper body 110 , a predetermined space may be formed. The formed space may serve to buffer impact force or vibration. For example, the impact force or vibration transmitted from the lower part is vertically absorbed by each of the third damper washer 142 and the fourth damper washer 144 and is horizontally absorbed by the above-described predetermined space. Accordingly, even if a cushioning material made of a material such as oil is not injected into the cylinder, the air in the formed space serves as a cushioning material. Therefore, oil leakage does not occur.

In this embodiment, the depth of the hollow of the cylinder part 112 is the thickness of the first damper washer 122, the thickness of the second damper washer 124, the thickness of the stepped member 134 of the damper piston 130, the second It may be equal to the sum of the thickness of the third damper washer 142 and the thickness of the fourth damper washer 144 .

The damper cover part 150 is disposed on the damper body part 110 to join the upper damper washer part 140, and the shaft member 132 of the damper piston 130 is exposed by a predetermined height through a hole formed in the center part. . A first cover hole 154a, a second cover hole 154b, a third cover hole 154c, and a fourth cover hole 154d are formed at the edge of the damper cover part 150 . The first cover hole 154a , the second cover hole 154b , the third cover hole 154c , and the fourth cover hole 154d are a first body fastening hole 112a formed in the top of the cylinder part 112 , respectively. , corresponding to the second body fastening hole 112b, the third body fastening hole 112c, and the fourth body fastening hole 112d.

The fastening part 160 connects the damper body part 110 and the damper cover part 150 to each other. In this embodiment, the fastening part 160 penetrates through the first cover hole 154a and is fastened to the first body fastening hole 112a of the damper body 110 by the first screw 162 and the second cover. The second screw 164 that penetrates through the hole 154b and is fastened to the second body fastening hole 112b of the damper body 110, and the damper body 110 penetrates through the third cover hole 154c. The fourth penetrates through the third screw 166 and the fourth cover hole 154d fastened to the third body fastening hole 112c of the screw 168 .

In this embodiment, each material of the first damper washer 122 , the second damper washer 124 , the third damper washer 142 , and the fourth damper washer 144 may include ethylene rubber. On the other hand, the material of each of the first damper washer 122, the second damper washer 124, and the fourth damper washer 144 includes ethylene rubber, and the material of the third damper washer 142 may include carbon steel. there is.

In the present embodiment, the shaft member 132 of the damper piston 130 may be exposed to the outside through a hole formed in the damper body 110 .

The first piezoelectric element 170 is disposed parallel to the lower surface of the damper body portion to sense a vertical seismic motion according to the pressure applied by the earthquake. In this embodiment, the first piezoelectric element 170 may have a circular shape. In general, a piezoelectric element is an element capable of generating electrical energy when receiving mechanical force or causing mechanical deformation when receiving electrical energy. Such a piezoelectric element has the above characteristics due to a piezoelectric material, and a material such as ceramics or polymers may be used as the piezoelectric element.

In this embodiment, the first piezoelectric element 170 may include a lower electrode (not shown), a piezoelectric ceramic (not shown), and an upper electrode (not shown). The lower electrode may be formed on a separate base, and the upper electrode may also be formed on a separate base. The separate base may be formed in a circular shape. The lower electrode and the upper electrode may be any material that can be used as an electrode, and for example, Cu, Ag, Au, Al, CNT, Graphene, ITO, etc. may be used. The piezoelectric ceramic is not particularly limited, and for example, a Pb(Zr,Ti)O ₃ based piezoelectric oxide, a Pb-free piezoelectric ceramic, or the like may be used.

In this embodiment, the first piezoelectric element 170 includes a ring-type piezoelectric element and is disposed between the lower damper washer part 120 and the damper piston 130 . In order to increase the vertical seismic motion detection efficiency by the first piezoelectric element 170 , a portion in contact with the first piezoelectric element 170 , that is, the lower surface of the lower damper washer part 120 and the inner lower surface of the cylinder part 112 . A plurality of protrusions may be formed on at least one surface. Although not shown in the drawing, the first piezoelectric element 170 may provide a first piezoelectric signal sensed to a piezoelectric signal converter to be described later through a wire connected to the lower electrode and a wire connected to the upper electrode.

The second piezoelectric element 180 is disposed to surround the lower region of the damper piston 130 in parallel to the extending direction of the damper piston 130 and senses horizontal seismic motion generated according to the pressure applied by the earthquake. In the present embodiment, the second piezoelectric element 180 has a flexible rectangular shape capable of being bent and is disposed to surround the lower damper washer unit 120 . For example, the second piezoelectric element 180 may include a polyvinylidene fluoride (PVDF) piezoelectric film having a unique dielectric effect, a piezoelectric effect, and a thermoelectric effect as a new polymer piezoelectric conversion material. Compared with piezoelectric ceramics, PVDF piezoelectric film has flexibility, impact resistance, high voltage resistance, water resistance, and chemical stability.

In this embodiment, the second piezoelectric element 180 is disposed between the hollow inner surface and the lower damper washer part 120 . In order to increase the horizontal seismic motion detection efficiency by the second piezoelectric element 180 , at least one of the portion in contact with the second piezoelectric element 180 , that is, the hollow inner surface and the lower damper washer part 120 , has a plurality of surfaces on it. Protrusions may be formed. Although not shown in the drawing, the second piezoelectric element 180 may provide a second piezoelectric signal sensed to a piezoelectric signal converter to be described later through a wire connected to the lower electrode and a wire connected to the upper electrode.

In the above, the second piezoelectric element 180 is configured as one and disposed to surround the lower region of the damper piston 130 to sense the horizontal seismic motion, but a plurality of, for example, four are separated and the damper piston 130 It may be arranged to surround the lower region of As such, when a plurality of second piezoelectric elements 180 are separated and disposed, the direction of the source of the horizontal earthquake motion may be recognized.

As described above, according to the present embodiment, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first for additionally sensing vertical earthquake motion By disposing a piezoelectric element between the lower damper washer part and the damper piston of the earthquake-resistant structure, and placing a second piezoelectric element for sensing horizontal seismic motion between the hollow inner surface of the earthquake-resistant structure and the lower damper washer part, by earthquake occurrence By uniformly reducing the shock and vibration transmitted from the outside, it is possible to secure the safety of various switchboards such as switchboards, closed switchboards, high-voltage switchboards, low-voltage switchboards, control boards, and distribution boards while simultaneously detecting seismic motion.

4 is an exploded perspective view illustrating the second flexible piezoelectric element 180 shown in FIG. 2 .

Referring to FIG. 4 , the flexible second piezoelectric element 180 may be formed of a piezoelectric fiber-containing composite. The piezoelectric fiber-containing composite has a structure in which one or more piezoelectric fibers made of a material having piezoelectric properties are surrounded and protected by a matrix made of a polymer, etc. in a state in which they are arranged in a predetermined direction, or one or more piezoelectric fibers arranged in a predetermined direction It means a composite having a structure in which a protective layer made of a polymer or the like is laminated with a layer made of

The piezoelectric fiber-containing composite includes a first protective layer 182 , a second protective layer 184 facing the first protective layer 182 , and between the first protective layer 182 and the second protective layer 184 . and a piezoelectric fiber layer 186 disposed thereon.

A first electrode 183 is formed on one surface of the first passivation layer 182 , and a second electrode 185 is formed on one surface of the second passivation layer 184 . As the material of the first electrode 183 and the second electrode 185 , a known electrode material such as copper (Cu), silver (Ag), gold (Au), or aluminum (Al) may be used without limitation.

The first protective layer 182 and the second protective layer 184 are preferably made of a polymer material, for example, polyimide (PI), polyethylene napthalate (PEN), polyethylene terephthalate ( It may be made of polyethylene terephthalate (PET) or polycarbonate (PC).

The piezoelectric fiber layer 186 is interposed between the first electrode 183 and the second electrode 185 and includes one or more piezoelectric fibers arranged in the longitudinal direction of the composite. In this case, the piezoelectric fiber is made of a single crystal piezoelectric material. The single crystal piezoelectric material may have a perovskite crystal structure (RMO3) or a complex perovskite structure.

5 is a block diagram illustrating a control system of a switchgear facility using an earthquake-resistant structure having an earthquake detection function according to an embodiment of the present invention. 6 is a circuit diagram for explaining an example of the rectifying unit shown in FIG. FIG. 7 is a circuit diagram for explaining an example of the conversion circuit shown in FIG. 5 .

5, 6 and 7, the control system of the switchgear facility using the earthquake-resistant structure having a seismic motion detection function according to an embodiment of the present invention includes a piezoelectric element 510, a rectifier 520, and a power supply 530. , a conversion circuit 540 , a comparison unit 550 , and a switchgear operation control unit 560 . Here, the operating power Vdd is supplied to each unit from the power supply unit 530 . In this specification, although the switchgear facility is described, it is obvious that those skilled in the art can equally apply to a closed switchboard facility, a high voltage switchboard facility, a low voltage switchboard facility, a control panel facility, a switchboard facility, and the like.

The piezoelectric element 510 has a donut shape as described in FIGS. 2 and 3 and has a first piezoelectric element 170 that outputs a first piezoelectric signal according to a vertical earthquake motion or a second piezoelectric element 170 that has a flexible rectangular shape and has a horizontal earthquake motion It may be the second piezoelectric element 180 that outputs a signal. In this embodiment, the piezoelectric element 510 is disposed in the earthquake-resistant structure, and as a shock wave such as an earthquake is applied to the earthquake-resistant structure, the first piezoelectric signal or the second piezoelectric signal is output to the rectifying unit 520 in response to the impact.

As shown in Fig. 6, the rectifying unit 520 includes a diode bridge composed of diodes D1 to D4, and a smoothing capacitor Ch formed between the output terminals T5 and T6 of the above-described diode bridge. there is.

Output terminals T1 and T2 of the piezoelectric element 510 are respectively connected to the input terminals T3 and T4 of the rectifying unit 520 , respectively. Accordingly, the rectifying unit 520 rectifies the AC voltage corresponding to the pressure applied to the piezoelectric element, input from the piezoelectric element 510 , smoothes it, and outputs it to the power supply unit 530 as a DC voltage.

Referring back to FIG. 5 , the power supply unit 530 has a battery (a secondary battery) therein, and is consumed in each circuit for the conversion circuit 540 , the comparison unit 550 , and the switchgear operation control unit 560 . supply driving power. In addition, the power supply unit 530 has a charging circuit, converts the DC voltage supplied from the rectifier unit 520 into a voltage suitable for charging the battery, and charges the battery as electrical energy.

As shown in Fig. 7, the conversion circuit 540 converts the DC voltage input from the rectifier 520 by the resistor R1 (resistance value r1) and the resistor R2 (resistance value r2). The voltage Va is divided, the divided voltage Vs is Vs = Va × {r2/(r1 + r2)}, and the impedance is converted and output by a voltage follower circuit composed of an Operational Amplifier (OP1). do.

The resistors R1 and R2 are set to have high resistance with respect to the output impedance of the piezoelectric element 510, so that the AC voltage generated by the piezoelectric element 510 can be output as a high voltage, so electrical energy used for charging As a result, it is efficiently supplied to the power supply unit 530 .

The comparator 550 compares the divided voltage Vs input from the conversion circuit 540 with a preset set voltage Vt (threshold value). In this comparison result, the comparator 550 outputs an abnormal signal at L-level (the amount of impulse in the normal range) when the divided voltage Vs is equal to or less than the set voltage Vt, and the divided voltage Vs is set When the voltage Vt is exceeded, the abnormal signal is output as H-level (the amount of impulse in the abnormal range). The set voltage Vt is set by a set voltage generating circuit (not shown) constituted by a voltage dividing circuit using a variable resistor or the like when changing the magnitude of the impulse to be abnormal or the voltage dividing ratio in the conversion circuit 540 . may be arbitrarily changed in response to the adjustment of

When the abnormal signal output from the comparison unit 550 transitions from the L-level to the H-level, the switchgear operation control unit 560 controls the electrode plate 13 by an abnormal shock amount (eg, a large vibration such as an earthquake vibration). ) is detected, the switchgear controls its operation to cut off power according to an earthquake of a certain seismic level. Here, the seismic intensity is a grading scale based on a facility that is determined as a numerical expression of a person's feeling or the degree of shaking of an object or structure in the vicinity of the strength of an earthquake that appears in a certain place. On the other hand, when the abnormal signal transitions from the H-level to the L-level, that is, when a normal amount of impact is detected, the switchgear operation control unit 560 controls the switchgear to operate normally.

Here, as the switchgear operation control unit 560, a micro processor unit (MPU) or the like is used, and the abnormal signal is input to an IRQ (interrupt request) terminal. In addition, the switchgear operation control unit 560 itself is in a stopped state so as not to consume power of the battery when an abnormal signal is input at L-level (other than the function of activating the MPU when input to the internal IRQ terminal is stopped) state) and is configured to be activated when it reaches H-level. When an H-level signal is input to the IRQ terminal, an intervention process is started, that is, the switchgear operation control unit 560 enters an activated state.

The switchgear operation control unit 560 may use an A/D converter and an MPU having a memory having a sufficient storage capacity to record an abnormal signal, thereby simplifying the circuit.

8 is an exploded perspective view illustrating an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention. 9 is a cross-sectional view for explaining an earthquake-resistant structure having an earthquake detection function shown in FIG.

8 and 9, the earthquake-resistant structure 200 having a seismic motion detection function according to another embodiment of the present invention includes the bottom part of various switchboards such as a switchboard, a closed switchboard, a high-pressure switchboard, a low-voltage switchboard, a control board, and a switchboard; Installed between the ground and buffer body part 110, lower damper washer part 120, damper piston 130, upper damper washer part 140 in order to buffer impact force or earthquake motion acting on the switchboard and detect earthquake motion, It includes a damper cover part 150 , a fastening part 160 , a first piezoelectric element 670 and a second piezoelectric element 680 . In the present embodiment, the first piezoelectric element 670, which is a ring-shaped piezoelectric element, is disposed between the damper piston 130 and the upper damper washer 140, and the second piezoelectric element 680 is a hollow inner surface and the upper part. An example arranged between the damper washer parts 140 is shown. The earthquake-resistant structure 200 having a seismic motion detection function shown in FIGS. 8 and 9 is a first piezoelectric element 670 and a second in comparison with the earthquake-resistant structure 100 having an earthquake-motion detection function shown in FIGS. 2 and 3 . Since the elements are substantially the same except for the piezoelectric element 680, a detailed description thereof will be omitted.

The first piezoelectric element 670 is disposed parallel to the lower surface of the damper body 110 to sense vertical seismic motion according to the pressure applied by the earthquake. In this embodiment, the first piezoelectric element 670 may have a circular shape. The first piezoelectric element 670 includes a ring-type piezoelectric element and is disposed between the damper piston 130 and the upper damper washer 140 . In order to increase the vertical seismic motion detection efficiency by the first piezoelectric element 670 , the portion in contact with the first piezoelectric element 670 , that is, the upper surface of the stepped member 134 of the damper piston 130 and the upper damper washer 140 ), a plurality of projections may be formed on at least one of the lower surfaces.

The second piezoelectric element 680 is disposed to surround the upper region of the damper piston 130 in parallel to the extending direction of the damper piston 130 , and detects horizontal seismic motion generated according to the pressure applied by the earthquake. In the present embodiment, the second piezoelectric element 680 has a flexible rectangular shape and is disposed to surround the upper damper washer 140 . That is, in the present embodiment, the second piezoelectric element 680 is disposed between the hollow inner surface and the upper damper washer 140 . In order to increase the horizontal seismic motion detection efficiency by the second piezoelectric element 680, a portion in contact with the second piezoelectric element 680, that is, at least one of the hollow inner surface and the upper damper washer 140, has a plurality of surfaces. Protrusions may be formed.

In the above, the second piezoelectric element 680 is composed of one and is disposed to surround the upper region of the damper piston 130 to sense the horizontal earthquake motion, but a plurality, for example, four are separated and the damper piston 130. It may be arranged to surround the upper region of As such, when a plurality of second piezoelectric elements 680 are separated and disposed, the direction of the source of the horizontal earthquake motion may be recognized.

As described above, according to the present embodiment, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first for additionally sensing vertical earthquake motion By arranging a piezoelectric element between the damper piston and the upper damper washer of the earthquake-resistant structure, and placing a second piezoelectric element for sensing horizontal seismic motion between the hollow inner surface of the earthquake-resistant structure and the upper damper washer, by earthquake occurrence By uniformly reducing the shock and vibration transmitted from the outside, it is possible to secure the safety of various switchboards such as switchboards, closed switchboards, high-voltage switchboards, low-voltage switchboards, control boards, and distribution boards while simultaneously detecting seismic motion.

10 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention. 11 is a cross-sectional view for explaining an earthquake-resistant structure having a seismic motion detection function shown in FIG.

10 and 11, the earthquake-resistant structure 300 having a seismic motion detection function according to another embodiment of the present invention is installed between the floor and the ground of the switchboard to buffer the impact force or earthquake motion acting on the switchboard, and In order to detect earthquake motion, the damper body part 110, the lower damper washer part 120, the damper piston 130, the upper damper washer part 140, the damper cover part 150, the coupling part 160, the first piezoelectric It includes an element 770 and a second piezoelectric element 780 . In this embodiment, the first piezoelectric element 770, which is a ring-shaped piezoelectric element, is disposed between the upper damper washer part 140 and the damper cover part 150, and the second piezoelectric element 780 is the lower damper washer part 120 ) and an example disposed between the damper piston 130 is shown. The earthquake-resistant structure 300 having a seismic motion detection function shown in FIGS. 11 and 12 is a first piezoelectric element 770 and a second in comparison with the earthquake-resistant structure 100 having a seismic motion detection function shown in FIGS. 2 and 3 . Since the components are substantially the same except for the piezoelectric element 780, a detailed description thereof will be omitted.

The first piezoelectric element 770 is disposed parallel to the lower surface of the damper body 110 to sense a vertical seismic motion according to the pressure applied by the earthquake. In this embodiment, the first piezoelectric element 770 may have a circular shape. The first piezoelectric element 770 includes a ring-type piezoelectric element and is disposed between the upper damper washer 140 and the damper cover 150 . In order to increase the vertical seismic motion detection efficiency by the first piezoelectric element 770 , a portion in contact with the first piezoelectric element 770 , that is, among the upper surface of the upper damper washer 140 and the lower surface of the damper cover 150 , A plurality of protrusions may be formed on at least one surface.

The second piezoelectric element 780 is disposed to surround the lower region of the damper piston 130 in parallel to the extension direction of the damper piston 130 and senses horizontal seismic motion generated according to the pressure applied by the earthquake. In the present embodiment, the second piezoelectric element 780 has a flexible rectangular shape and is disposed to surround the lower side surface of the shaft member 132 of the damper piston 130 . That is, in the present embodiment, the second piezoelectric element 780 is disposed between the side surface of the shaft member 132 of the damper piston 130 and the lower damper washer part 120 . In order to increase the horizontal seismic motion detection efficiency by the second piezoelectric element 780, the portion in contact with the second piezoelectric element 780, that is, the side surface of the shaft member 132 of the damper piston 130 and the lower damper washer part 120 A plurality of protrusions may be formed on at least one of the inner surfaces of the .

In the above, the second piezoelectric element 780 is composed of one and is disposed to surround the lower region of the damper piston 130 to sense the horizontal earthquake motion, but a plurality of, for example, four are separated and the damper piston 130. It may be arranged to surround the lower region of In this way, when a plurality of second piezoelectric elements 780 are separated and disposed, the direction of the source of the horizontal earthquake motion may be recognized.

As described above, according to the present embodiment, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first for additionally sensing vertical earthquake motion By disposing a piezoelectric element between the upper damper washer part and the damper cover part of the earthquake-resistant structure, and arranging a second piezoelectric element for sensing horizontal earthquake motion between the side surface of the shaft member of the damper piston of the earthquake-resistant structure and the lower damper washer part, By uniformly reducing the shock and vibration transmitted from the outside due to the occurrence of an earthquake, it is possible to secure the safety of various switchboards such as switchboards, closed switchboards, high voltage switchboards, low voltage switchboards, control boards, and distribution boards, while simultaneously detecting seismic motion.

12 is an exploded perspective view illustrating an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention. 13 is a cross-sectional view for explaining an earthquake-resistant structure having an earthquake detection function shown in FIG. 12 .

12 and 13, the earthquake-resistant structure 400 having a seismic motion detection function according to another embodiment of the present invention is installed between the floor and the ground of the switchboard to buffer the impact force or earthquake motion acting on the switchboard, and In order to detect earthquake motion, the damper body part 110, the lower damper washer part 120, the damper piston 130, the upper damper washer part 140, the damper cover part 150, the coupling part 160, the first piezoelectric It includes an element 870 and a second piezoelectric element 880 . In this embodiment, the first piezoelectric element 870, which is a ring-shaped piezoelectric element, is disposed between the upper damper washer part 140 and the damper cover part 150, and the second piezoelectric element 880 is the upper damper washer part 140 ) and an example disposed between the damper piston 130 is shown. The earthquake-resistant structure 400 having a seismic motion detection function shown in FIGS. 12 and 13 is a first piezoelectric element 870 and a second when compared with the earthquake-resistant structure 100 having an earthquake-motion detection function shown in FIGS. 2 and 3 . Since the elements are substantially the same except for the piezoelectric element 880, a detailed description thereof will be omitted.

The first piezoelectric element 870 is disposed parallel to the lower surface of the damper body 110 to sense vertical seismic motion according to the pressure applied by the earthquake. In this embodiment, the first piezoelectric element 870 may have a circular shape. The first piezoelectric element 870 includes a ring-shaped piezoelectric element and is disposed between the upper damper washer 140 and the damper cover 150 . In order to increase the vertical seismic motion detection efficiency by the first piezoelectric element 870 , a portion in contact with the first piezoelectric element 870 , that is, among the upper surface of the upper damper washer 140 and the lower surface of the damper cover 150 , A plurality of protrusions may be formed on at least one surface.

The second piezoelectric element 880 is disposed to surround the upper region of the damper piston 130 in parallel to the extension direction of the damper piston 130 and senses horizontal seismic motion generated according to the pressure applied by the earthquake. In the present embodiment, the second piezoelectric element 880 has a flexible rectangular shape and is disposed to surround the upper side surface of the shaft member 132 of the damper piston 130 . That is, in the present embodiment, the second piezoelectric element 880 is disposed between the side surface of the shaft member 132 of the damper piston 130 and the upper damper washer 140 . In order to increase the horizontal seismic motion detection efficiency by the second piezoelectric element 880, the portion in contact with the second piezoelectric element 880, that is, the side surface of the shaft member 132 of the damper piston 130 and the upper damper washer part 120 A plurality of protrusions may be formed on at least one of the inner surfaces of the .

In the above, the second piezoelectric element 880 is configured as one and is disposed to surround the upper region of the damper piston 130 to sense the horizontal seismic motion, but a plurality, for example, four are separated and the damper piston 130 It may be arranged to surround the upper region of As such, when a plurality of second piezoelectric elements 880 are separated and disposed, the direction of the source of the horizontal earthquake motion may be recognized.

As described above, according to the present embodiment, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first for additionally sensing vertical earthquake motion By disposing a piezoelectric element between the upper damper washer part and the damper cover part of the earthquake-resistant structure, and placing a second piezoelectric element for sensing horizontal earthquake motion between the side surface of the shaft member of the damper piston of the earthquake-resistant structure and the upper damper washer part, By uniformly reducing the shock and vibration transmitted from the outside due to the occurrence of an earthquake, it is possible to secure the safety of various switchboards such as switchboards, closed switchboards, high voltage switchboards, low voltage switchboards, control boards, and distribution boards, while simultaneously detecting seismic motion.

14 is an exploded perspective view for explaining an earthquake-resistant structure having a seismic motion detection function according to another embodiment of the present invention. FIG. 15 is a cross-sectional view illustrating an earthquake-resistant structure having an earthquake-motion detection function shown in FIG. 14 .

14 and 15, the earthquake-resistant structure 500 having a seismic motion detection function according to another embodiment of the present invention is installed between the floor and the ground of the switchboard to buffer the impact force or earthquake motion acting on the switchboard, and In order to detect earthquake motion, the damper body part 110, the lower damper washer part 120, the damper piston 130, the upper damper washer part 140, the damper cover part 150, the coupling part 160, the first piezoelectric It includes an element 970 and a second piezoelectric element 980 . In this embodiment, a first piezoelectric element 970, which is a disk-shaped piezoelectric element, is attached to the bottom surface of the damper body 110 , and the second piezoelectric element 980 is connected to the upper damper washer 140 and the damper piston 130 . ), an example placed between them is shown. The earthquake-resistant structure 500 having a seismic motion detection function shown in FIGS. 14 and 15 is a first piezoelectric element 970 and a second when compared to the earthquake-resistant structure 100 having an earthquake-proof structure 100 shown in FIGS. 2 and 3 . Since the elements are substantially the same except for the piezoelectric element 980, a detailed description thereof will be omitted.

The first piezoelectric element 970 is disposed parallel to the lower surface of the damper body 110 to sense vertical seismic motion according to the pressure applied by the earthquake. In this embodiment, the first piezoelectric element 970 may have a circular shape. The first piezoelectric element 970 includes a disk-shaped piezoelectric element and is disposed in the attachment of the damper body 110 . In order to increase the vertical seismic motion detection efficiency by the first piezoelectric element 970 , a plurality of protrusions may be formed on a portion in contact with the first piezoelectric element 970 , that is, on the lower surface of the damper body 110 .

The second piezoelectric element 980 is disposed to surround the upper region of the damper piston 130 in parallel to the extending direction of the damper piston 130 and senses horizontal seismic motion generated according to the pressure applied by the earthquake. In the present embodiment, the second piezoelectric element 980 has a flexible rectangular shape and is disposed to surround the upper side surface of the shaft member 132 of the damper piston 130 . That is, in the present embodiment, the second piezoelectric element 980 is disposed between the side surface of the shaft member 132 of the damper piston 130 and the upper damper washer 140 . In order to increase the horizontal seismic motion detection efficiency by the second piezoelectric element 980, the portion in contact with the second piezoelectric element 980, that is, the side surface of the shaft member 132 of the damper piston 130 and the upper damper washer part 120 A plurality of protrusions may be formed on at least one of the inner surfaces of the .

In the above, the second piezoelectric element 980 is configured as one and is disposed to surround the upper region of the damper piston 130 to sense the horizontal seismic motion, but a plurality, for example, is separated into four and the damper piston 130. It may be arranged to surround the upper region of As such, when a plurality of second piezoelectric elements 980 are separated and disposed, the direction of the source of the horizontal earthquake motion may be recognized.

As described above, according to the present embodiment, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first for additionally sensing vertical earthquake motion By arranging a piezoelectric element to be attached to the damper body of the earthquake-resistant structure, and placing a second piezoelectric element for sensing horizontal earthquake motion between the side surface of the shaft member of the damper piston of the earthquake-resistant structure and the upper damper washer portion, By uniformly reducing the shock and vibration transmitted from the switchgear, it is possible to secure the safety of various switchboards such as switchboards, closed switchboards, high-voltage switchboards, low-voltage switchboards, control boards, and distribution boards while simultaneously detecting seismic motion.

16 is an exploded perspective view illustrating a switchgear assembly having an earthquake-resistant structure according to an embodiment of the present invention.

Referring to FIG. 16 , the switchgear assembly according to an embodiment of the present invention includes a switchboard 200 , an upper bracket 300 , a lower bracket 400 , and an earthquake-resistant structure 100 .

The switchboard 200 includes a case 210 , a door 220 configured on a side surface of the case 210 to open and close, and an electric device (not shown) installed inside the case 210 . The switchgear 200 converts an extra high voltage of 6,600V to 22,900V into a low voltage such as 380V, 220V, and supplies necessary power to a group power demander such as a school, a building, an apartment complex, a factory, and the like.

The upper bracket 300 is disposed along one side of the bottom of the switchboard 200 . The upper bracket 300 includes a first bracket 310 disposed along one side of the bottom of the switchboard 200, and a second bracket 320 disposed along the other side parallel to one side of the bottom of the switchboard 200. do. In the present embodiment, both edge portions extending in the width direction in each of the first bracket 310 and the second bracket 320 are bent downward, that is, toward the lower bracket 400 .

Each of the first bracket 310 and the second bracket 320 has a first bracket hole ( 330) is formed. A first screw 340 penetrating through the bottom surface of the case 210 passes through the first bracket hole 330 and is fastened to the screw thread of the shaft member 132 .

The lower bracket 400 is fixed to the ground, disposed along the upper bracket 300 and fitted to the upper bracket 300 . The lower bracket 400 is disposed along the first bracket 310 and is disposed along the third bracket 410 fitted to the first bracket 310 and the second bracket 320 is disposed along the second bracket 320 . and a fourth bracket 420 to be fitted. In the present embodiment, both edge portions extending in the width direction in each of the third bracket 410 and the fourth bracket 420 are bent upward, that is, toward the upper bracket 300 . In this embodiment, the width of each of the third bracket 410 and the fourth bracket 420 is implemented to be smaller than the width of each of the first bracket 310 and the second bracket 320, so that the third bracket 410 and Each of the fourth brackets 420 is inserted into each of the first bracket 310 and the second bracket 320 .

A second bracket hole (not shown) formed to correspond to the wing hole formed in the wing part 114 of the damper body part 110 is formed in each of the third bracket 410 and the fourth bracket 420 . A second screw 430 penetrating downward through the second bracket hole is coupled to the wing hole formed in the wing portion.

The earthquake-resistant structure 100 is installed between the upper bracket 300 and the lower bracket 400 to buffer the vertical and horizontal vibrations acting on the switchboard 200, and detects the vertical and horizontal earthquakes. The earthquake-resistant structure 100 may have the structure described in FIGS. 2 and 3 , may have the structure described in FIGS. 8 and 9 , may have the structure described in FIGS. 10 and 11 , and FIG. 12 . and the structure described in FIG. 13 or the structure described in FIGS. 14 and 15 , a detailed description thereof will be omitted.

In the above, the earthquake-resistant structure according to the present invention is employed in the lower part of various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board to detect vertical and horizontal earthquake motion while buffering the impact force or vibration transmitted from the ground. Although it has been described, the earthquake-resistant structure can be applied in various ways. For example, it may be employed in a pier or a building requiring seismic design.

17 is a block diagram illustrating an operation control system of a switchgear assembly having a seismic motion detection function according to an embodiment of the present invention.

Referring to FIG. 17 , the operation control system of the switchgear assembly having a seismic motion detection function according to an embodiment of the present invention includes a piezoelectric signal conversion unit 610 , a progress class storage unit 620 , a seismic intensity class determination unit 630 and and a switchgear operation control unit 640 .

The piezoelectric signal conversion unit 610 converts each of the first piezoelectric signal V1 and the second piezoelectric signal H1 to output a vertical shock wave signal and a horizontal shock wave signal to the intensity level determination unit 630 . The first piezoelectric signal V1 may be output from a first piezoelectric element provided in an earthquake-resistant structure having a seismic wave sensing function, and the second piezoelectric signal H1 is output from a second piezoelectric element provided in the earthquake-resistant structure can be The earthquake-resistant structure, the first piezoelectric element, and the second piezoelectric element may have the arrangement structure described in FIGS. 2 and 3 , may have the arrangement structure described in FIGS. 8 and 9 , and FIGS. 10 and FIG. It may have the arrangement structure described with reference to 11 , it may have the arrangement structure described with reference to FIGS. 12 and 13 , and may have the arrangement structure described with reference to FIGS. 14 and 15 .

On the other hand, although FIG. 17 shows that the first piezoelectric signal V1 and the second piezoelectric signal H1 output from one earthquake-resistant structure are provided to the piezoelectric signal conversion unit 610, in each of the plurality of earthquake-resistant structures A first piezoelectric signal V1 and a second piezoelectric signal H1 are output, and each of the plurality of piezoelectric signal converters 610 converts the first piezoelectric signal V1 and the second piezoelectric signal H1 into a vertical shock wave. Signals and horizontal shock wave signals may be output to the progress class determination unit 630 . For example, earthquake-resistant structures may be disposed at each of four places under one switchboard to provide the first piezoelectric signal V1 and the second piezoelectric signal H1 to the piezoelectric signal converter 610 . As another example, earthquake-resistant structures may be disposed at each of the four lower portions of each of the plurality of switchgear to provide the first piezoelectric signal V1 and the second piezoelectric signal H1 to the piezoelectric signal converter 610 .

The seismic intensity class storage unit 620 stores the summation signal for each seismic intensity class (or the summation signal for each MM scale) of the earthquake motion. The magnitude of the earthquake motion is a numerical expression of the magnitude of the earthquake motion that appears in a certain place when an earthquake occurs.

The Republic of Korea used the JMA intensity scale set by the Japan Meteorological Agency (JMA), but the MM intensity scale used in many countries is used by reflecting the opinions of academia and research circles. The JMA intensity class divided the intensity of earthquakes into 8 levels, but the MM intensity class divides the intensity of earthquakes by subdividing them into 12 levels.

MM (Modified Mercalli) magnitude was first created by Italian seismologist Mercalli in 1902, and modified by American seismologist Richter Richter in 1956 after being modified by American HO Wood and Frank Neumann in 1931. (Richter).

An example of the sum signal for each MM scale stored in the progress class storage unit 620 according to the present embodiment is described in Table 1 below.

[Table 1]

Referring to Table 1, when the sum signal is 0, the MM scale is mapped to I as the progress class. If the sum signal is greater than 0 and less than 2, the MM scale is mapped to II as a progress class. When the sum signal is greater than 2 and less than 4, the MM scale is mapped to III as a progress class. When the sum signal is greater than 4 and less than 6, the MM scale is mapped to IV as a progress class. When the sum signal is greater than 6 and less than 8, the MM scale is determined as V as the progress level. When the sum signal is greater than 8 and less than 10, the MM scale is mapped to VI as a progress class. When the sum signal is greater than 10 and less than 12, the MM scale is mapped to VII as a progress class. When the sum signal is greater than 12 and less than 14, the MM scale is mapped to VIII as a progress class. When the sum signal is greater than 14 and less than 16, the MM scale is mapped to IX as a progress class. When the sum signal is greater than 16 and less than 18, the MM scale is mapped to X as a progress class. If the sum signal is greater than 18 and less than 20, the MM scale is mapped to XI as a progress class. When the sum signal is a value of 20 or more, the MM scale is mapped to XII as a progress class. The sum signal for each MM scale described in Table 1 is a simplified number for convenience of explanation, and the sum signal can be set in various ways. In addition, although the above-described summation signals are arranged at equal intervals and mapped to the MM scale, they may be arranged at differential intervals and mapped to the MM scale.

In response to the sum signal obtained by summing the vertical shock wave signal and the horizontal shock wave signal, the seismic intensity class determination unit 630 queries the intensity class storage unit 620 for the summed signal to determine the seismic intensity class of the earthquake motion, and the determined intensity class is provided to the switchgear operation control unit 640 .

The switchgear operation control unit 640 prevents damage to the switchboard by differentially tripping the circuit breaker provided in the switchboard according to the progress class determined by the progress level determination unit 630 . For example, when the progress level is higher than the first range and lower than the second range, the switchgear operation control unit 640 controls to cut off the power supply from the switchboard to the sub-power supply line. Here, the second range is higher than the first range, and the first range and the second range can be set by an administrator. The sub-power supply line may be a maximum demand power unit.

On the other hand, if the progress level is higher than or equal to the second range, the switchgear operation control unit 640 controls to cut off both the power supply and the sub-power supply line transmitted from the switchboard to the main power supply line. Here, the main power supply line may be an inlet circuit breaker (VCB, LBS) of a switchboard.

On the other hand, if the progress level is lower than or equal to the first range, the switchgear operation control unit 640 does not need to cut off the sub-power supply line and the main power supply line.

In this way, by selectively and differentially blocking the power supplied to power devices according to the magnitude of the earthquake, all power is prevented from being cut off unnecessarily, and at the same time, by completely shutting off the power supply in a high-risk situation, the It is possible to prevent electric power fires that may occur.

FIG. 18 is a circuit diagram for explaining the piezoelectric signal converter 610 shown in FIG. 17 .

17 and 18 , the piezoelectric signal conversion unit 610 includes a first amplifier 611 , a first filter unit 612 , a first buffer 613 , a second amplifier 614 , and a second It includes a filter unit 615 and a second buffer 616 .

The first amplifier 611 includes the second operational amplifier OP2, the third resistor R3 connected to the negative terminal and the ground terminal of the second operational amplifier OP2, the output terminal and the second operational amplifier OP2 2 The first piezoelectric signal V1 output from the first piezoelectric element including the fourth resistor R4 connected to the negative terminal of the operational amplifier OP2 is amplified and then provided to the first filter unit 612 .

The first filter unit 612 includes a fifth diode D5 having an anode connected to the output terminal of the second operational amplifier OP2, one end connected to the cathode of the fifth diode D5, and a fifth resistor R5 having the other end connected to ground. ) and a first capacitor C1 having one end connected to the cathode of the fifth diode D5 and the other end grounded, the noise in the first piezoelectric signal V1 amplified by the first amplifier 611 . After removing the component, it is provided to the first buffer 613 .

The first buffer 613 includes a third operational amplifier OP3 having a negative terminal connected to the output terminal, and buffers the first piezoelectric signal V1 from which the noise has been removed by the first filter unit 612 to determine the magnitude. output to (630).

The second amplifier 614 includes a fourth operational amplifier OP4, a sixth resistor R6 connected to the negative terminal of the fourth operational amplifier OP4 and a ground terminal, and an output terminal and a second amplifier of the fourth operational amplifier OP4. 4 The second piezoelectric signal H1 output from the second piezoelectric element including the seventh resistor R7 connected to the negative terminal of the operational amplifier OP4 is amplified and then provided to the second filter unit 615 .

The second filter unit 615 includes a sixth diode D6 having an anode connected to the output terminal of the fourth operational amplifier OP4, an eighth resistor R8 having one end connected to the cathode of the sixth diode D6 and the other end grounded. ) and a second capacitor C2 having one end connected to the cathode of the sixth diode D6 and the other end grounded, the noise in the second piezoelectric signal H1 amplified by the second amplifier 614 . After removing the component, it is provided to the second buffer 616 .

The second buffer 616 includes a fifth operational amplifier OP5 having a negative end connected to the output terminal, and buffers the second piezoelectric signal H1 from which the noise has been removed by the second filter unit 615 to buffer the progress class determination unit. output to (630).

19 is a flowchart illustrating an operation control method of a switchgear assembly having a seismic motion detection function according to an embodiment of the present invention.

Referring to FIG. 19 , it is checked whether the first piezoelectric signal V1 output from the first piezoelectric element is received (step S110 ). The check whether the first piezoelectric signal V1 is received may be performed by the piezoelectric signal converter 610 (shown in FIG. 17 ). In this embodiment, the first piezoelectric element may be disposed in the earthquake-resistant structure as described in FIGS. 2 and 3, may be disposed in the earthquake-resistant structure as described in FIGS. 8 and 9, and in FIGS. 10 and It may be disposed in the earthquake-resistant structure as described in FIG. 11 , may be disposed in the earthquake-resistant structure as described in FIGS. 12 and 13 , and may be disposed in the earthquake-resistant structure as described in FIGS. 14 and 15 . .

When it is checked that the first piezoelectric signal V1 is received, a vertical shock wave signal is generated based on the first piezoelectric signal V1 (step S120 ). The generation of the vertical shock wave signal may be performed by the piezoelectric signal conversion unit 610 (shown in FIG. 17 ).

It is checked whether the second piezoelectric signal H1 output from the second piezoelectric element is received (step S130). Checking whether the second piezoelectric signal H1 is received may be performed by the piezoelectric signal converter 610 (shown in FIG. 17 ). In this embodiment, the second piezoelectric element may be disposed in the earthquake-resistant structure as described in FIGS. 2 and 3, may be disposed in the earthquake-resistant structure as described in FIGS. 8 and 9, and in FIGS. 10 and It may be disposed in the earthquake-resistant structure as described in FIG. 11 , may be disposed in the earthquake-resistant structure as described in FIGS. 12 and 13 , and may be disposed in the earthquake-resistant structure as described in FIGS. 14 and 15 . .

When it is checked that the second piezoelectric signal H1 is received, a horizontal shock wave signal is generated based on the second piezoelectric signal H1 (step S140). The generation of the vertical shock wave signal may be performed by the piezoelectric signal conversion unit 610 (shown in FIG. 17 ).

The operation of the switchboard is controlled based on the vertical shock wave signal generated in step S120 and the horizontal shock wave signal generated in step S140 (step S150). The above-described operation control of the switchboard may be performed by the switchboard operation control unit 640 (shown in FIG. 17 ). For example, if it is judged that there is a dangerous state according to the occurrence grade of the earthquake based on the vertical shock wave signal and the horizontal shock wave signal, the dangerous state is notified through an external alarm, etc. It prevents damage to various switchboards such as high-voltage switchgear, low-voltage switchboard, control board, and distribution board.

FIG. 20 is a flowchart for explaining a step of generating the vertical shock wave signal shown in FIG. 19 .

19 and 20 , the first piezoelectric signal V1 is amplified (step S122). The amplification of the first piezoelectric signal V1 may be performed by a first amplifying unit 611 (shown in FIG. 18 ).

Next, after the noise component included in the first piezoelectric signal V1 amplified in step S122 is removed to generate the vertical shock wave signal (step S124), step S130 is performed. The above-described noise component removal may be performed by the first filter unit 612 (shown in FIG. 18 ).

21 is a flowchart for explaining a step of generating the horizontal shock wave signal shown in FIG. 19 .

Referring to FIG. 21 , the second piezoelectric signal H1 is amplified (step S142). The amplification of the second piezoelectric signal H1 may be performed by a second amplifying unit 614 (shown in FIG. 18 ).

Next, after the noise component included in the second piezoelectric signal H1 amplified in step S142 is removed to generate the horizontal shock wave signal (step S144), step S150 is performed. The noise component removal may be performed by the second filter unit 615 (shown in FIG. 18 ).

22 is a flowchart for explaining the step of differentially controlling the operation of the switchboard based on the vertical shock wave signal and the horizontal shock wave signal shown in FIG. 19 .

19, 20 and 22 , the vertical shock wave signal and the horizontal shock wave signal are summed to generate a summed signal (step S152). The generation of the above-described sum signal may be performed by the progress level determination unit 630 (shown in FIG. 17).

Next, the progress class corresponding to the sum signal is queried from the progress class storage unit (step S154). The above-mentioned progress class inquiry may be performed by the progress class determination unit 630 (shown in FIG. 17).

Next, the operation of the switchboard is differentially controlled in response to the inquired progress class (step S156). The above-described operation control of the switchboard may be performed by the switchboard operation controller 640 (shown in FIG. 17 ). For example, when the progress level is higher than the first range and lower than the second range, the switchboard operation control unit 640 controls to cut off the power supply from the switchboard to the sub-power supply line. Here, the second range is higher than the first range, and the first range and the second range can be set by an administrator. The sub-power supply line may be a maximum demand power unit.

On the other hand, if the progress level is higher than or equal to the second range, the switchboard operation control unit 640 controls to cut off both the power supply and the sub-power supply line transmitted from the switchboard to the main power supply line. Here, the main power supply line may be an inlet circuit breaker (VCB, LBS) of a switchboard.

On the other hand, if the progress level is lower than or equal to the first range, the switchgear operation control unit 640 does not cut off the sub-power supply line and the main power supply line.

As described above, in addition to the configuration for buffering earthquake motion acting on various switchboards such as switchgear, closed switchboard, high-voltage switchboard, low-voltage switchboard, control panel, and distribution board, the first piezoelectric element and horizontal earthquake motion for additionally sensing vertical earthquake motion are added. By arranging each of the second piezoelectric elements for sensing in the earthquake-resistant structure, the shock and vibration transmitted from the outside due to the occurrence of an earthquake are uniformly reduced, so that the While ensuring safety, it is possible to simultaneously detect vertical and horizontal earthquake motions. In addition, by forming a plurality of protrusions in the inner region of the seismic structure in which the first piezoelectric element and the second piezoelectric element are in contact with each other, it is possible to increase the detection efficiency of the vertical earthquake motion or the horizontal earthquake motion.

Although the above has been described with reference to the embodiments, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below You will understand.

100: seismic structure 110: damper body part
120: lower damper washer 130: damper piston
140: upper damper washer part 150: damper cover part
160: fastening part 182: first protective layer
184: second protective layer 186: piezoelectric fiber layer
200: switchboard 300: upper bracket
400: lower bracket 510: piezoelectric element
520: rectifying unit 530: power unit
540: conversion circuit 550: comparison unit
560, 640: switchgear operation control unit 610: piezoelectric signal conversion unit
620: progress class storage unit 630: progress class judgment unit
611: first amplification unit 612: first filter unit
613: first buffer 614: second amplification unit
615: second filter unit 616: second buffer
170, 670, 770, 870, 970: first piezoelectric element
180, 680, 780, 880, 980: second piezoelectric element

Claims (15)

In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by an earthquake,
A plurality of protrusions are formed on the upper surface of the upper damper washer part and are in contact with the first piezoelectric element. delete In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by an earthquake is included, wherein the lower surface of the damper cover part has a second piezoelectric element. A seismic structure having a seismic motion detection function, characterized in that a plurality of protrusions are formed and come in contact with the first piezoelectric element. In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer and the damper piston to sense horizontal seismic motion generated according to pressure applied by an earthquake, the upper surface of the upper damper washer and a plurality of protrusions are formed on each of the lower surfaces of the damper cover,
The first piezoelectric element is an earthquake-resistant structure having an earthquake detection function, characterized in that disposed between the protrusions facing each other. In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal seismic motion generated according to the pressure applied by an earthquake, the inner surface of the lower damper washer part A seismic structure having a seismic motion detection function, characterized in that the plurality of protrusions are formed in contact with the second piezoelectric element. In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal seismic motion generated according to the pressure applied by an earthquake is included. The seismic structure having a seismic motion detection function, characterized in that the projections are formed in contact with the second piezoelectric element. In an earthquake-resistant structure having a seismic motion detection function that buffers the earthquake motion acting on the switchgear and detects the earthquake motion,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by an earthquake, the inner surface of the upper damper washer part and a plurality of protrusions are formed on each of the outer surfaces of the damper piston,
The second piezoelectric element is an earthquake-resistant structure having an earthquake detection function, characterized in that disposed between the protrusions facing each other. a switchgear including a case, a door configured on a side surface of the case to open and close, and an electric device installed inside the case;
an upper bracket disposed along one side of the bottom of the switchboard;
a lower bracket disposed along the upper bracket and fitted to the upper bracket; and
Installed between the upper bracket and the lower bracket, buffering the vertical and horizontal earthquake motion acting on the switchgear, and comprising an earthquake-resistant structure for sensing the vertical and horizontal earthquake motion, the earthquake-resistant structure,
a damper body part having a circular hollow cylinder part;
a lower damper washer including a plurality of damper washers having a donut shape and disposed in the hollow;
a damper piston having a shaft member having a predetermined length and a stepped member protruding outward from the middle portion of the shaft member, inserted into the hollow, passing through the lower damper washer portion, and exposed to a hole formed in the bottom portion of the damper body portion;
an upper damper washer including a plurality of damper washers having a donut shape, the upper damper washer being inserted into the hollow and disposed on the stepped member of the damper piston;
a damper cover part disposed on the damper body part to press the upper damper washer part and exposing the shaft member by a predetermined height through a hole formed in the center part;
a first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake; and
A second piezoelectric element having a flexible band shape and disposed between the upper damper washer part and the damper piston to sense horizontal earthquake motion generated according to the pressure applied by an earthquake,
A plurality of protrusions are formed on an upper surface of the upper damper washer to contact the first piezoelectric element. The method of claim 8, wherein the first piezoelectric element outputs a first piezoelectric signal according to the vertical earthquake motion, and the second piezoelectric element outputs a second piezoelectric signal according to the horizontal earthquake motion,
a piezoelectric signal conversion unit converting each of the first piezoelectric signal and the second piezoelectric signal to output a vertical shock wave signal and a horizontal shock wave signal;
a seismic intensity class storage unit for storing the summation signal for each seismic intensity class;
a seismic class judging unit for determining a seismic intensity class of an earthquake motion by inquiring the sum signal from the intensity class storage unit in response to the sum signal obtained by adding the vertical shock wave signal and the horizontal shock wave signal; and
The switchgear assembly having a seismic motion detection function, characterized in that it further comprises a switchboard operation control unit for preventing damage to the switchboard by tripping a circuit breaker provided in the switchboard according to the intensity level determined by the intensity level determination unit. The method of claim 9, wherein the piezoelectric signal conversion unit,
a first amplifier for amplifying the first piezoelectric signal;
a first filter for removing a noise component from the first piezoelectric signal amplified by the amplifier;
a second amplifier for amplifying the second piezoelectric signal; and
and a second filter for removing a noise component from the second piezoelectric signal amplified by the second amplifier. The method of claim 10, wherein the piezoelectric signal conversion unit,
a first buffer buffering the signal from which the noise has been removed by the first filter and providing it to the progress class determination unit; and
The switchgear assembly having a seismic motion detection function, further comprising a second buffer buffering the signal from which the noise has been removed by the second filter and providing the buffered signal to the intensity class determination unit. (a) a damper body portion having a circular hollow cylinder portion, a lower damper washer portion including a plurality of damper washers having a donut shape and disposed in the hollow, a shaft member of a certain length and an intermediate portion of the shaft member a damper piston having a stepped member protruding outward from the body, inserted into the hollow, penetrating through the lower damper washer and exposed to a hole formed in the bottom of the damper body, and a plurality of damper washers having a donut shape, an upper damper washer inserted in the hollow and disposed on the stepped member of the damper piston, and disposed in the damper body to press the upper damper washer, and to expose the shaft member by a predetermined height through a hole formed in the center A first piezoelectric element having a donut shape and fitted on the shaft member and disposed between the upper damper washer and the damper cover to sense a vertical seismic motion applied by an earthquake, and a flexible band shape An earthquake-resistant structure including a second piezoelectric element disposed between the upper damper washer part and the damper piston and sensing horizontal seismic motion generated according to the pressure applied by an earthquake with a installing between the upper bracket and the lower bracket disposed along the upper bracket and fitted to the upper bracket;
(b) when a first piezoelectric signal is received from the first piezoelectric element, generating a vertical shock wave signal based on the first piezoelectric signal;
(c) when a second piezoelectric signal is received from the second piezoelectric element, generating a horizontal shock wave signal based on the second piezoelectric signal; and
(d) differentially controlling the operation of the switchboard based on the vertical shock wave signal and the horizontal shock wave signal. According to claim 12, wherein the step (b),
(b-1) amplifying the first piezoelectric signal; and
(b-2) generating the vertical shock wave signal by removing noise from the amplified first piezoelectric signal. The method of claim 12, wherein step (c) comprises:
(c-1) amplifying the second piezoelectric signal; and
(c-2) generating the horizontal shock wave signal by removing noise from the amplified second piezoelectric signal. The method of claim 13, wherein step (d) comprises:
(d-1) generating a sum signal by summing the vertical shock wave signal and the horizontal shock wave signal;
(d-2) deriving an MM scale by inquiring a seismic class corresponding to the summed signal generated in step (d-1) in a seismic class storage unit that stores the summed signals for each seismic motion class; and
(d-3) A method for controlling the operation of a switchgear assembly having a seismic motion detection function, comprising the step of differentially controlling the operation of the switchgear in response to the inquired MM scale.

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