KR101818910B1 - Earthquake resistant type gas insulated load break switch - Google Patents

Abstract

The present invention relates to an earthquake-resistant insulated load switch manufactured by adding performance by adding earthquake resisting, vibration damping and seismic isolation performance to respond to an external force such as an earthquake or a physical impact from the outside and, more specifically, to earthquake-resistant insulated load switch comprising: an opening and closing facility; and earthquake-resistant equipment coupled to a lower portion of the opening and closing facility to support the opening/closing facility. The earthquake-resistant equipment comprises: a first support member coupled to a lower portion of the opening and closing facility; a second support member formed on both sides of a lower portion of the first support member; a third support member located on a vertical lower portion of the second support member and supported on the floor surface; a first earthquake-resistant member having a cylindrical body of an elastic material having an uneven part formed on the circumferential surface thereof, and including a first bolt fastening part formed in an upper portion of the body and a second bolt fastening part formed in a lower portion of the body, wherein the first bolt fastening part is coupled to a lower end of the opening and closing facility through the second support member and the first support member, and the second bolt fastening part is coupled to the third support member; and a second earthquake-resistant member located at each end of the second member to be coupled, and simultaneously fastening and supporting the first support member, the second support member, and the third support member.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an earthed double-

The present invention relates to a seismic isolation load switch, and more particularly, to a seismic isolation load switch manufactured by adding seismic resistance, vibration suppression, and seismic isolation so as to cope with an external force such as an external physical shock or an earthquake.

1 (a) and 1 (b) illustrate a conventional insulated load switch, a conventional insulated load switch and a combined structure of the insulated load switch, 1 (c) shows a state where the conventional insulated load switch is fixed by an anchor bolt, and Fig. 1 (d) shows a conventional insulated load switch broken by an external impact or an earthquake will be.

Referring to FIG. 1, a conventional insulating load switch is a structure in which an anchor bolt is directly fixed between a ground and a product in a state in which no shock absorber (dustproof, earthquake resistant, anti-vibration,

In other words, it has a structure in which an anchor bolt is used to fix to a thin steel plate on the bottom surface, and there is a high possibility of deformation due to an external impact or an earthquake (external force) and disconnection.

In addition, since most of the conventional insulated load switches are installed on the road side, fatigue stress is accumulated in the structure and the driving part due to long-term vibration, and the lifetime of the product is shortened because there is no buffer structure due to vibrations generated in vehicles and the like.

In addition, since there is no buffer structure, a displacement due to external impact occurs as shown in Fig. 1 (d).

The above-described problems have caused problems such as power failure due to breakage of the insulating load switch.

(0001) Laid-open Patent Publication No. 10-2016-0031304 (safety cover of gas insulated load switch) (0002) No. 10-1707229 (arc extinguisher for load switchgear and load switch with same)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seismic isolation load switch having an earthquake-resistant structure in order to cope with an external force such as a physical shock or an earthquake from the outside.

According to an aspect of the present invention, there is provided a seismic isolation load switch including: an opening / closing facility; And a seismic facility coupled to a lower portion of the open / close facility to support the open / close facility, wherein the seismic facility comprises: a first support member coupled to a lower portion of the open / close facility; A second support member formed on both sides of the lower portion of the first support member; A third support member positioned at a vertically lower portion of the second support member and supported on the bottom surface; A first bolt fastening portion is formed on an upper portion of the body, a second bolt fastening portion is formed on a lower portion of the body, and the first bolt fastening portion is formed on the upper portion of the body, A first vibration-proofing member fastened to the lower end of the opening / closing facility through the second supporting member and the first supporting member, and the second bolt fastening member fastened to the third supporting member; And a second seismic member coupled to the end of each of the second support members and coupled to support the first support member, the second support member, and the third support member at the same time.

In addition, the second vibration-proof member may have a first folded surface and is coupled to a lower surface of the first support member, the first folded surface being bent perpendicularly to the first folded surface, A first steel damper having a support member and a surface adjacent to the third support member perpendicular to the first bent surface, and a plurality of first heat dissipating holes formed in the first 1-1 bent surface; A second steel damper having a first steel damper and a second steel damper, the second steel damper being located at a predetermined distance from the first steel damper, the second steel damper being formed with a second bent surface and being fastened to the second support member and the third support member, Is bent in a triangular shape and a surface adjacent to the lower surface of the first supporting member is perpendicular to the second bent surface, and the second-1 bent surface is provided with a plurality of second heat dissipating surfaces A second steel damper having a hole formed therein; And an elastic damper coupled between the first steel damper and the second steel damper, wherein the first steel damper, the second steel damper, and the elastic damper are combined to form a single body. do.

The first earthquake-proof member may be configured to calculate a tensile force by the following equation (1), calculate a conducting force by the following equation (2), and then divide a larger one of the calculated tensile force and the conducted power by the quantity of the first earthquake- And the load of the first earthquake-proof member is selected.

(Equation 1)

F ₁ (tensile force) = {Gh (center height of the switchgear) - 0.25 x D _s (base anchor hole spacing)} W _t (gross weight of switchgear) / {2 x D _s

(Equation 2)

F ₂ (conduction) = W _t (gross weight of the switchgear) / 4 (the number of first seismic members)

The second earthquake-proof member is characterized in that the deformation coefficient of the second earthquake-proof member is designed to be 5 to 6 mm by the following equation 3.

(Equation 3)

Deformation coefficient of the second seismic member = X (deformation length of elastic damper) / T (thickness of elastic damper)

Wherein the bolts used in the seismic isolation load switch are M12 bolts and the bolt torque is maintained at 40 to 50 Nm.

According to the present invention described above, it is possible to improve seismic resistance, vibration damping and seismic performance of the insulating load switch by the configuration of the first and second seismic members.

In addition, by a combined mechanism of the first supporting member, the second supporting member, the third supporting member, the first earthquake-proof member, the second earthquake-proof member and the clamp, And the like can be effectively damped.

Further, the seismic performance can be improved by the construction of the first steel damper and the second steel damper, and the vibration damper and the seismic isolation performance can be improved with the structure of the elastic damper, and the vibration can be prevented and the displacement can be reduced.

Further, by combining the low-frequency attenuation of the first and second steel dampers with the high-frequency attenuation performance of the elastic damper, high-frequency attenuation by a vehicle or the like and low-frequency attenuation by an earthquake are all possible.

Further, since the first and second heat dissipating holes are provided to effectively dissipate heat generated at the time of attenuation of the elastic damper, the attenuation capability of the elastic damper can be maintained and improved.

Further, the stability of the first and second steel dampers can be improved by forming the shape of the first and second steel dampers in the most stable triangular structure among the supporting structures.

In addition, since the concave-convex portion is formed on the waist-surrounding surface of the first vibration-proof member, the load is sequentially applied to each of the concavo-convex portions so that the external force is damped while being dispersed. Therefore, breakage of the rubber damper due to abrupt external force can be prevented, Can be improved.

As shown in FIG. 4, before the damper is mounted, the strain increases continuously with the increase of the earthquake acceleration, and the permanent deformation that affects the function of the product is advanced. On the other hand, Is limited, so that only the elastic deformation that the maximum strain does not affect the function proceeds.

Further, by selecting and applying a torque value having a small rate of frequency change so that the torque of the bolt used in the anti-segregation insulating load switch can be satisfied both in the high frequency and the low frequency, the deformation of the bolt can be prevented.

In addition, since each structure constituting the seismic equipments is manufactured through the mechanical structure design, it is possible to greatly improve the effect of seismic, vibration suppression, seismic and vibration prevention by a complex mechanism.

FIG. 1 is a perspective view of a conventional insulated load switch, its coupling structure, and photographs taken when an external force such as an impact or an earthquake occurs,
FIG. 2 is a perspective view of a seismic isolation load switch according to an embodiment of the present invention,
3 is an exploded perspective view of an anti-segregation insulated load switch according to an embodiment of the present invention,
FIG. 4 is a graph showing the strains according to seismic acceleration due to the mounting of the first and second seismic members,
5 is a graph showing a frequency reduction rate according to a torque of an M12 bolt most frequently used in a switchgear.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms.

The terms used herein are used only for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, 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 this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

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

FIG. 2 is an exploded perspective view of a seismic isolation load switch according to an embodiment of the present invention, FIG. 3 is an exploded perspective view of a seismic isolation load switch according to an embodiment of the present invention, A graph illustrating a strain rate of each of the first and second seismic members 210 and 220 according to an earthquake acceleration and a frequency reduction rate according to a torque of an M12 bolt most frequently used in a switchgear.

2 to 5, a seismic isolation load switch according to the present invention will be described below.

The seismic isolation load switch according to the present invention comprises an opening / closing facility 100 and an earthquake-proof facility 200, and the opening / closing facility 100 is a well-known technology.

The earthquake-proof facility 200 is coupled to a lower portion of the opening and closing facility 100 to support the opening and closing facility 100 and includes a first supporting member 210, a second supporting member 220, a third supporting member 230, And includes a first vibration-proof member 240 and a second vibration-proof member 250.

The first support member 210 is coupled to a lower portion of the opening and closing apparatus 100 and is mounted on the upper portion of the opening and closing apparatus 100. The first support member 210 has a flat plate shape, .

The second support member 220 may be formed on both sides of the lower portion of the first support member 210 and may be formed as a single body with the first support member 210 or may be formed as a separate body.

The third support member 230 is located at a vertically lower portion of the second support member 220 and is supported by the bottom surface of the third support member 230 and is supported by the first and second vibration- And is connected to the support member 220. The third support member 230 serves as a pedestal, and can be designed according to the size and weight of the opening and closing apparatus 100.

The first vibration-proof member 240 includes a cylindrical body 243 made of an elastic material such as rubber or the like, a first bolt coupling part 241 coupled to the upper center of the body 243, And a 2-bolt fastening portion 242. A concave / convex portion 243-1 is formed on the peripheral surface of the body 243. Since the load is sequentially applied to the concave-convex part 243-1 while the use load of the body 243 is increased by the configuration of the concave-convex part 243-1, the external force is dispersed and attenuated, The breakage can be prevented and the torsional damping ability is improved. Further, the first vibration-proof member 240 can be formed on the same line as the shaft supporting the opening / closing equipment 100, and the damping capability of the torsional load in the front, rear, left, and right directions can be improved. The first bolt fastening part 241 is fastened to the lower end of the opening and closing facility 100 through the second support member 220 and the first support member 210 and the second bolt fastening part 242 is fastened to the lower end of the open / (Not shown). Although only the nuts are shown on the drawing for fastening the first bolt fastening part 241 and the second bolt fastening part 242, parts such as a washer can be additionally constructed in order to firmly fasten them in a known technique.

The second seismic member 250 is coupled to the lower edge of the opening and closing device 100 and is disposed below the first support member 210 and supports the second support member 220 and the third support member 230 Respectively. That is, the first support member 210, the second support member 220, and the third support member 230 are simultaneously fastened and supported.

The second seismic member 250 includes a first steel damper 251, a second steel damper 252, and an elastic damper 253.

The first steel damper 251 is formed on the lower surface of the first support member 210 with the first bent surface 251-1 formed therein and is fixed to the inner side of the first bent surface 251-1 The first folding surface 251-2 bent in a vertical direction from the rear side to the lower side has a triangular shape and a left side surface adjacent to the second supporting member 220 and the third supporting member 230 is formed into a first folded surface And a plurality of first heat dissipating holes 251-3 are formed on the first 1-1 bent surface 251-2.

The second steel damper 252 is located at a predetermined distance from the first steel damper 251 in a shape corresponding to the first steel damper 251 and a second bent surface 252-1 is formed A second 1-folding surface (not shown) which is fastened to the second supporting member 220 and the third supporting member 230 and is vertically bent rightward from the inner side (rear side in FIG. 2) to the second folding surface 252-1 The upper surface adjacent to the lower surface of the first supporting member 210 is perpendicular to the left second folding surface 252-1 and the second-1 folding surface 252-2 A plurality of second heat dissipating holes 252-3 are formed.

On the other hand, the first folding surface 251-1, the first folding surface 251-2, the second folding surface 252-1, and the second-1 folding surface 252-2 are formed inside and outside The direction in which the second seismic member 250 is bent may vary depending on the position of the second seismic member 250.

The elastic damper 253 is made of an elastic material such as rubber or the like and is coupled between the first steel damper 251 and the second steel damper 252. The elastic damper 253 is attached to the first steel damper 251, The second steel damper 252 and the elastic damper 253 are constituted by one body.

In the case of the second vibration-proof member 250, the second vibration-proof member 250 is hardened by the heat generated during the change of the ambient temperature and the damping action, and the performance is remarkably reduced. However, since the heat can be released to the outside by the configuration of the first heat dissipating hole 251-3 and the second heat dissipating hole 252-3, the damping ability due to this can be maintained for a considerable period of time, Can be improved.

Further, the seismic performance is improved by the construction of the first steel damper 251 and the second steel damper 252, and the vibration damper and seismic isolation performance are improved by the structure of the elastic damper 253, .

Since the first and second steel dampers 251 and 252 have a low frequency damping effect and have a high frequency damping effect with the structure of the elastic damper 253, And low-frequency attenuation by all of the above.

The first earthquake-proof member 240 according to the present invention calculates the tensile force by the following equation (Equation 1), calculates a conductive force by the following equation (Equation 2), and then calculates a larger one of the tensile force and the conductive force, The load of the first earthquake-proof member 240 is divided by the number of the members 240.

(Equation 1)

F ₁ (tensile force) = {Gh (center height of the switchgear) - 0.25 x D _s (base anchor hole spacing)} W _t (gross weight of switchgear) / {2 x D _s
As shown in FIG. 3, D _s (base anchor hole interval) is a distance between centers of holes formed in the first support member 210 and the second support member 220, to which the first bolt coupling portion 241 is coupled, it means.

(Equation 2)

F ₂ (conduction) = W _t (gross weight of the switchgear) / 4 (the number of first seismic members)

If the center height of the switchgear is 1065, the distance between the base anchor holes is 1080, and the total weight of the switchgear is 450 kg, the tensile force becomes 166 and the conductivity becomes 113.

Therefore, when a larger value is substituted for the tensile force 166, the selection load of the first earthquake-proof member 240 is four and becomes 41.5 kg.

Further, the second earthquake-proof member 250 is designed so that the deformation coefficient of the second earthquake-proof member 250 is 5 to 6 mm by the following equation (3).

(Equation 3)

The deformation coefficient of the second seismic member 250 = X (deformation length of the elastic damper) / T (thickness of the elastic damper)

On the other hand, the areas of the first heat dissipating holes 251-3 and the second heat dissipating holes 252-3 are determined by the following equation (4).

(Equation 4)

A (heat dissipation hole area) = P (loss) / [h (convective heat transfer coefficient) DELTA T (temperature change)]

The convective heat transfer coefficient depends on the air velocity and is usually in the range of 10 ~ 100 [W / ㎡ ℃], while the above equation (4) is based on 10 [W / ㎡ ℃] assuming natural cooling.

Therefore, when the convection heat transfer coefficient is 10, the temperature change is 3, and the loss is 1,500, the area of the heat dissipating holes 251-3 and 252-3 is 50 mm 2.

The effects of the first and second seismic members 240 and 250 constructed as described above are shown graphically in FIG.

That is, before the construction of the first and second seismic members 240 and 250, the strain is continuously increased with the increase of the earthquake acceleration, and the 'permanent deformation' After the construction of the vibration-proof member 240 and the second vibration-proof member 250, it can be seen that the displacement is limited due to the damping ability, and only the 'elastic deformation', which does not affect the function, proceeds.

The bolts used in the seismic isolation load switch of the present invention are preferably bolts of M12 size, and the bolt torque is preferably maintained at 40 to 50 Nm.

That is, since vibration due to an earthquake is a low frequency, not a high frequency generated from a general machine and ground, a loosening phenomenon occurs due to an instantaneous external force. In response to this, a torque value .

Referring to FIG. 5, it can be seen that as the torque value increases, the frequency attenuation rate decreases. However, after 50 Nm, the frequency damping ratio is constant, which means that the bolt is deformed as the torque increases. Therefore, the bolt torque of M12 is preferably maintained at 40 to 50 Nm.

10: Enclosure
20: Conventional insulated load switch
30: Conventional clamp
100: Switching facility
200: seismic facility 210: first support member
220: second support member 230: third support member
240: first earthquake-proof member 243: body
243-1: concave / convex portion 241: first bolt fastening portion
242: second bolt fastening part 250: second seismic member
251: first steel damper 251-1: first bent surface
251-2: 1-1 Bending face 251-3: First heat radiating hole
252: second steel damper 252-1: second bending face
252-2: 2nd-1st bending face 252-3: 2nd heat radiating hole
253: Elastic damper

Claims (3)

The present invention relates to a seismic isolation load switch having a resistance against an earthquake and an external shock,
Opening and closing facilities; And
And an earthquake-proof facility coupled to a lower portion of the opening / closing facility to support the opening / closing facility,
The earthquake-
A first support member coupled to a lower portion of the opening / closing facility;
A second support member formed on both sides of the lower portion of the first support member;
A third support member positioned at a vertically lower portion of the second support member and supported on the bottom surface;
A first bolt fastening portion is formed on an upper portion of the body, a second bolt fastening portion is formed on a lower portion of the body, and the first bolt fastening portion is formed on the upper surface of the body, A first vibration-proofing member fastened to a lower end of the opening and closing facility through the second supporting member and the first supporting member, and the second bolt fastening member fastened to the third supporting member; And
And a second vibration-proof member coupled to the end of each of the second support members and coupled to the first support member, the second support member, and the third support member,
Wherein the second vibration-
The first folding surface is formed and is fastened to the lower surface of the first supporting member, and the first folding surface that is vertically bent at the inner side of the first folding surface has a triangular shape, A first steel damper having a surface adjacent to the member perpendicular to the first bent surface, and a plurality of first heat dissipating holes formed on the first 1-1 bent surface;
A second steel damper having a first steel damper and a second steel damper, the second steel damper being located at a predetermined distance from the first steel damper, the second steel damper being formed with a second bent surface and being fastened to the second support member and the third support member, The second-1 bent surface being vertically bent at the inner side is triangular in shape, and a surface close to the lower surface of the first supporting member is perpendicular to the second bent surface, and the second-1 bent surface is provided with a plurality of second A second steel damper having a heat dissipating hole formed therein; And
And an elastic damper coupled between the first steel damper and the second steel damper,
Wherein the first steel damper, the second steel damper, and the elastic damper are combined to form a single body,
Wherein the first vibration-
The tensile force is calculated by the following equation 1 and the load of the first seismic member is selected by dividing the calculated one of the tensile force and the conductive force among the calculated amounts by the quantity of the first seismic member Wherein the first and second load resistors are connected to each other.
(Equation 1)
F ₁ (tensile force) = {Gh (center height of the switchgear) - 0.25 x D _s (base anchor hole spacing)} W _t (gross weight of switchgear) / {2 x D _s
(Equation 2)
F ₂ (conduction) = W _t (gross weight of the switchgear) / 4 (the number of first seismic members)
2. The apparatus according to claim 1, wherein the second vibration-
And the deformation coefficient of the second earthquake-proof member is designed to be 5 to 6 mm by the following equation (3).
(Equation 3)
Deformation coefficient of the second seismic member = X (deformation length of elastic damper) / T (thickness of elastic damper)
3. The method according to claim 1 or 2,
Wherein the bolts used in the seismic isolation load switch are M12 bolts and the bolt torque is maintained at 40 to 50 Nm.

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