KR101210655B1 - Isolation device for vibration control of electric facility - Google Patents

Abstract

PURPOSE: An isolation device for vibration control of electric equipment is provided to selectively allow horizontal displacement according to a horizontal load and effectively dissipate energy through frictional damping. CONSTITUTION: An isolation device for vibration control of electric equipment comprises a lower fixing member(111), an upper fixing member(112), a horizontal displacement member(133), a pressing member(131), a first friction pad(121), a second friction pad, and a sliding member(114). The horizontal displacement member is installed to horizontally displace between the lower and upper fixing members and displaced along with electric equipment. The pressing member is elastically supported at the underside of the horizontal displacement member to press the lower fixing member. The first and second friction pads are fixed to the top of the lower fixing member and the bottom of the pressing member, respectively and contact each other with friction. The first and second friction pads restrict the horizontal displacement of the horizontal displacement member and the pressing member under a horizontal load less than a predetermined level while allowing horizontal displacement under a horizontal load of the predetermined level or greater to induce frictional damping. The sliding member is installed in the upper fixing member and contacts the top of the horizontal displacement member to allow the horizontal displacement member to displace in a horizontal direction, not to displace upward.

Description

Isolation Device for vibration control of electric facility

The present invention relates to a seismic isolator for electrical installations, in particular, the horizontal displacement due to large earthquakes limit the horizontal displacement for less than a certain load applied in the horizontal direction due to constant micro-vibration or small earthquake caused by wind load The present invention relates to a seismic isolator for electric equipment for vibration control to allow a horizontal displacement of a certain load applied to the circuit, while efficiently dissipating energy through friction attenuation.

In general, a substation is a collection of facilities installed for the transformation of voltage and current and the distribution of power in the process of sending the power produced by the power plant to the demand through transmission and distribution lines. On the other hand, substations that raise the generation voltage to the transmission voltage are called boost substations. Substations that lower the transmission voltage to distribution voltages or lower transmission voltages are called substations. Substations are called lower voltage substations, depending on their function. A substation that lowers is called a primary substation, and a substation that converts a transmission voltage into a distribution voltage is called a secondary substation.

Facilities installed in such substations include transformers, disconnectors, breakers, ancestors, lightning arresters, and switchboards, and it is very important to block the hazards in advance so that these facilities can maintain a stable power supply. Earthquake among the above hazards is difficult to predict and prepare for, and the damage pattern is fatal and wide. Therefore, various seismic and dustproof technologies are applied to substation facilities such as switchboards.

Referring to Figure 1 described in detail the seismic and dustproof technology applied to the conventional switchboard as follows. An anchor bolt 12 for interposing and fixing the switchboard 10 on the ground is interposed between the switchboard 10 and the ground and is simply fastened to the lower end 11 of the switchboard 10 to alleviate vibration caused by the surface. The dustproof pad 13 is interposed between the anchor bolt 12 and the ground.

According to this configuration, the vibration due to the earthquake may be alleviated to be directly transmitted to the switchboard 10, but the horizontal vibration caused by the earthquake is directly transmitted to the switchboard due to the simple fastening by the anchor bolt 12 so that the switchboard 10 There was a problem that can be broken or damaged.

In addition, in the case of the prior art, there was a problem that it is impossible to properly respond to the vibration in the horizontal direction. This is a fatal problem considering that the vibrations of the horizontal and vertical components work together during an earthquake.

In addition, when a relatively weak load is applied in the horizontal direction due to a constant earthquake and a small earthquake due to wind load, there is no way to cope properly with the case where a large load is applied due to a high earthquake.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to shift the horizontal direction against a load less than a certain amount applied in the horizontal direction due to the constant microscopic vibration or small earthquake caused by wind load. However, in order to provide a seismic isolator for electric equipment for vibration control to allow the horizontal displacement of a certain load applied in the horizontal direction due to a large earthquake, and to effectively dissipate energy through friction attenuation. have.

In order to achieve the above object, an electric equipment isolating apparatus according to the technical idea of the present invention includes an electric equipment isolating apparatus installed between a lower portion of the electric equipment and the ground, the lower fixing member being fixed to the ground; An upper fixing member connected to the lower fixing member at an upper side by a first connection member; The second connecting member is spaced downwardly with respect to the lower part of the electrical equipment, is installed so as to be horizontally displaceable between the lower fixing member and the upper fixing member is displaced together in the horizontal displacement of the electrical equipment A horizontal displacement member; A pressing member elastically supported at the lower portion of the horizontal displacement member to press the lower fixing member; The horizontal displacement of the horizontal displacement member and the pressing member is fixed to the upper surface of the lower fixing member and the lower surface of the pressing member, respectively, for frictional contact with each other. A first friction pad and a second friction pad that restrain the friction load while allowing horizontal displacement of the horizontal displacement member and the pressing member against a predetermined or more horizontal load; It is characterized in that the technical configuration is configured to include a sliding member which is installed on the upper fixing member and the horizontal displacement is allowed while suppressing the upward displacement of the horizontal displacement member while contacting the upper surface of the horizontal displacement member.

Here, the pressing member may be elastically supported by the first compression spring to the lower portion of the horizontal displacement member while increasing the friction between the first friction pad and the second friction pad.

In addition, the first connection member is provided with steel rods formed on the outer circumferential surface and penetrates the lower fixing member and the upper fixing member, and nuts are fastened to upper and lower ends of the first connecting member, respectively, to fix the lower fixing member and the upper fixing member. The distance between the members can be adjusted, but the friction force between the first friction pad and the second friction pad can be further increased when the separation between the lower fixing member and the upper fixing member is narrowed.

In addition, the horizontal displacement member, the upper portion is made in the shape of a disc but gradually decreases in width toward the lower portion of the main body having an inverted triangular cross section, and extending from the top to the left and right from the top of the main body respectively in the form of a second A coupling part coupled to a connection member, and a lower portion of the body portion extending from the lower portion of the main body to a lower portion of a box-shaped chamber portion, and the pressing member is formed in a box shape of an upper portion of the horizontal portion of the chamber portion of the horizontal displacement member. It may be characterized in that the vertical direction can be retracted in the inserted state.

In addition, a plurality of first protrusions and second protrusions may be provided in the chamber portion of the horizontal displacement member and the inside of the pressing member to correspond to each other to fit the upper end portion and the lower end portion of the first compression spring.

The first friction pad may be wider than the second friction pad so that the second friction pad does not leave the area of the first friction pad due to the horizontal displacement of the horizontal displacement member and the pressing member. It can be characterized.

The sliding member may include a bearing body fixed to the upper fixing member and a rolling ball rotatably received at a lower portion of the bearing body to make a cloud contact with an upper surface of the horizontal displacement member. can do.

In addition, the lower fixing member may be composed of a disk portion formed in the shape of a disc, and an extension portion coupled to the first connection member by extending in a bar shape from the disk portion to the front side and the rear side, respectively.

In addition, the upper surface of the disk portion is formed with a recessed portion may be characterized in that the first friction pad is seated.

In addition, the lower portion of the electrical installation, the H-shaped steel is laid along the periphery and coupled, the second connecting member is provided with a steel bar formed spirally on the outer peripheral surface, the upper end and the lower end of the lower rib of the H-shaped steel, respectively And it may be characterized in that for connecting the horizontal displacement member.

In addition, an insulating pad may be further provided between the upper rib of the H-shaped steel and the electrical installation to cut off the current.

The seismic isolator for electrical installations according to the present invention is horizontal with respect to a load below a certain level applied in the horizontal direction due to a constant earthquake or small earthquake caused by wind load due to the first friction pad and the second friction pad. Friction attenuation can effectively dissipate energy while limiting directional displacement, but allowing horizontal displacement for a certain load applied to the horizontal direction due to large earthquakes.

In addition, the present invention is configured to press the first friction pad and the second friction pad by the pressing member elastically supported by the compression spring can be expected a high friction force for friction attenuation.

In addition, the present invention is configured to be able to displace the position of the pressing member provided to press the first friction pad and the second friction pad is additional load required to obtain the required frictional force between the first friction pad and the second friction pad to the required degree Can be procured on its own.

1 is a reference diagram for explaining a base isolation device according to the prior art.
Figure 2 is a modeled perspective view showing a state in which the base isolation device is installed in the electrical installation according to an embodiment of the present invention.
Figure 3 is a front view showing a state in which the seismic isolator according to an embodiment of the present invention installed in the electrical installation.
Figure 4 is a plan view showing a state isolating apparatus installed in the electrical installation according to an embodiment of the present invention.
Figure 5 is a bottom view showing a state in which the seismic isolator according to an embodiment of the present invention installed in the electrical installation.
Figure 6 is a perspective view of the seismic isolator according to an embodiment of the present invention.
7 is a front view of the base isolation device according to an embodiment of the present invention.
Figure 8 is a side view of the base isolation device according to an embodiment of the present invention.
9 is a cross-sectional view for explaining the configuration of a base isolation device according to an embodiment of the present invention.
10 is an exploded perspective view for explaining the configuration of the base isolation device according to an embodiment of the present invention.
11A to 11C are a series of reference diagrams for explaining the operation of the seismic isolator according to the embodiment of the present invention when a horizontal vibration occurs due to an earthquake or wind load.

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

2 is a modeled perspective view showing a state in which an isolating device according to an embodiment of the present invention is installed in an electrical installation, and FIGS. 3 to 5 are front views showing a state in which the isolating device according to an embodiment of the present invention is installed in an electrical installation. , Top view, bottom view.

As shown, the seismic isolator 100 for an electrical installation according to an embodiment of the present invention, is installed between the electrical equipment 200 and the ground of various types, such as transformers, power panels, switchboards, photovoltaic power generation facilities, While controlling the horizontal vibration, the horizontal displacement is limited to less than a certain amount of horizontal load due to constant vibration or small earthquake, but the horizontal displacement is not applied to more than a certain amount of load applied to the horizontal direction due to a large earthquake. It is configured to dissipate energy efficiently through friction damping while allowing.

Hereinafter, the configuration of the seismic isolator for an electric installation according to an embodiment of the present invention will be described in detail.

6 to 8 are a perspective view, a front view and a side view of an isolating apparatus according to an embodiment of the present invention, and FIG. 9 is a cross-sectional view for explaining the configuration of the isolating apparatus according to the embodiment of the present invention. 10 is an exploded perspective view for explaining the configuration of a base isolation device according to an embodiment of the present invention.

As shown, the seismic isolator according to an embodiment of the present invention, the lower fixing member 111, the upper fixing member 112, the first connection member 113, the sliding bearing ball bearing 114, the first friction Pad 121 and second friction pad 122, the pressing member 131, the first compression spring 132, the horizontal displacement member 133, the second connecting member 141, H-shaped steel 161 and insulating pad 171.

Hereinafter, a seismic isolation device according to an embodiment of the present invention will be described based on the respective components.

The lower fixing member 111 is installed in a fixed form on the ground, and has a disk portion 111a formed in a disk shape and extends in a bar shape from the disk portion 111a to a front side and a rear side, respectively. It consists of an extension portion (111c) coupled with the connection member 113. In this case, a recessed seating portion 111b is formed on an upper surface of the disc 111a to allow the first friction pad 121 to be stably seated, and a first connection member 113 to the extension 111c. Spiral through holes are formed to penetrate the lower end of

The upper fixing member 112 serves to fix the ball bearing 114 to support the horizontal displacement member 133 so as to be horizontally displaceable from above. To this end, the upper fixing member 112 is coupled to the lower fixing member 111 spaced upward by the first connection member 113. In addition, the upper fixing member 112 is provided in the form of a square bar so as to face the extension portion (111c) of the lower fixing member 111, the through hole through which the ball bearing 114 is fixed through the center On the other hand, both ends are formed with a spiral through-hole formed so that the upper end of the first connection member 113 can pass therethrough.

The first connection member 113 is connected to the lower fixing member 111 and the upper fixing member 112 while being spaced apart by adjusting the separation while the first friction pad through the pressure member 131 installed therebetween. It serves to adjust the friction force between the 121 and the second friction pad 122. To this end, the first connection member 113 is provided with steel rods formed on the outer circumferential surface, and the nut 113a is fastened in a state where the upper end and the lower end pass through the lower fixing member 111 and the upper fixing member 112, respectively. By using the nut 113a to adjust the separation between the lower fixing member 111 and the upper fixing member 112.

Note that in this configuration, when the separation between the lower fixing member 111 and the upper fixing member 112 is narrowed, the frictional force between the first friction pad 121 and the second friction pad 122 is further increased. . Accordingly, the nut 113a fastened to the first connection member 113 when additional load is required because the friction force between the first friction pad 121 and the second friction pad 122 is not secured to an appropriate level only by the load of the electrical equipment. ) To narrow the separation between the lower fixing member 111 and the upper fixing member 112. Then, the horizontal displacement member 133 and the pressing member 131 is displaced downward to further press the first friction pad 121 and the second friction pad 122 located between the lower fixing member 111. By acting as a vertical drag to increase the friction between the first friction pad 121 and the second friction pad 122. For reference, the friction force between the first friction pad 121 and the second friction pad 122 is a vertical drag acting to include the load of the electrical equipment and the additional load and the first friction pad 121 and the second friction pad. It is obtained by multiplying the friction coefficient of 122. The present invention secures the additional load by pressing the first friction pad 121 and the second friction pad 122 while displacing the pressing member 131 in the vertical direction as described above. You can do it.

The horizontal displacement member 133 is connected to the lower side by the second connecting member 141 with respect to the lower portion of the electrical equipment, the pressing between the lower fixing member 111 and the upper fixing member 112 It is installed to be displaceable in the horizontal direction together with the member 131 and is displaced together in the horizontal displacement of the electrical equipment. In this case, the horizontal displacement member 133 is formed in the shape of a disk, but the width is gradually reduced toward the bottom to ensure sufficient rigidity so as not to be damaged when the horizontal load is applied to the body portion 133a having an inverted triangular cross section. Equipped. And a coupling part 133c extending from the upper portion of the main body portion 133a to the left side and the right side to be coupled to the second connection member 141, and extending downward from the lower portion of the main body portion 133a. The lower portion is further provided with a box-shaped chamber portion 133b. A plurality of first protrusions 133d into which the upper end of the first compression spring 132 is fitted is provided in the chamber 133b.

The pressing member 131 is coupled to the lower portion of the horizontal displacement member 133 by the first compression spring 132 so as to have a tendency to move together in the horizontal displacement of the horizontal displacement member 133 and to advance downward. It is elastically supported to continuously press the first friction pad 121 and the second friction pad 122 installed between the lower fixing member 111. As such, when the pressing member 131 presses the lower fixing member 111, the vertical drag increases due to the effect of securing an additional load in addition to the electrical equipment, thereby increasing the first friction pad 121 and the second friction pad. The friction force between the 122 is effectively increased. To this end, the pressing member 131 is formed in a box shape with an open upper portion, and a part of the pressing member 131 is inserted into the chamber part 133b of the horizontal displacement member 133. As a result, the pressing member 131 may be guided in the vertical direction while being guided in the chamber portion 133b of the horizontal displacement member 133. In addition, the pressing member 131 is provided with a second protrusion 131a formed to face the first protrusion 133d formed inside the chamber 133b of the horizontal displacement member 133, thereby providing a first compression spring ( The lower end of 132 is fitted.

The first compression spring 132 serves to elastically support the pressing member 131 and the first protrusion 133d formed at the upper end and the lower end of the chamber 133b of the horizontal displacement member 133. It is fitted to the second protrusion 131a formed inside the pressing member 131. Note that the first compression spring 132 is not used to control the vertical vibration. That is, the first compression spring 132 pushes the pressing member 131 downward by an elastic force to maintain a strong frictional contact between the first friction pad 121 and the second friction pad 122. This ensures a high frictional force.

The first friction pad 121 and the second friction pad 122 are respectively fixed to the upper surface of the lower fixing member 111 and the lower surface of the pressing member 131 and are in frictional contact with each other in the horizontal direction due to the horizontal vibration. The horizontal displacement of the horizontal displacement member 133 and the pressing member 131 is suppressed for less than a predetermined load, and the horizontal displacement member 133 and the pressing member (for the predetermined or more load applied in the horizontal direction). 131 allows horizontal displacement. Here, the first friction pad 121 has a larger size than the second friction pad 122, which is due to the horizontal displacement of the horizontal displacement member 133 and the pressing member 131 in the second friction pad 121. Inducing friction attenuation by a uniform friction force by continuously contacting the same area between the first friction pad 121 and the second friction pad 122 while not leaving the area of the first friction pad 121. For sake.

The first friction pad 121 and the second friction pad 122 may be made of Teflon sheet or stainless steel. In case of Teflon sheet, the coefficient of friction is 0.04, which is the smallest coefficient of friction among metals, and it has heat resistance to withstand temperatures from minus 110 degrees to 260 degrees and has chemical resistance against strong acids and alkali hydrochloric acid. It has a high durability because it does not adhere well to water or oil, and has very high insulation, low loss rate and surface resistance over a wide frequency band. It is a composite material combined with glass fiber, so it has excellent dimensions even under high temperature and high pressure. It has excellent characteristics such as having stability. On the other hand, in the case of stainless steel, it is a steel alloy containing about 11% of chromium and has corrosion resistance, which is less rust and corrosion than general steel. Therefore, in consideration of the case where the switchboard equipment is installed outdoors, it is possible to prevent rust or pollution easily caused by the surrounding environmental factors.

The ball bearing 114 serves to suppress and suppress the horizontal displacement member 133 when the horizontal displacement member 133 rises due to the repulsive force of the first compression spring 132 between the upper fixing member 112 and the horizontal displacement member 133. Do it. At the same time, it acts freely for horizontal displacement. To this end, the ball bearing 114 is rotatably received in the lower portion of the bearing main body 114b and the bearing main body 114b which are fastened and fixed to the upper fixing member 112 by a bolt 114c provided at an upper portion thereof. Roll rolling ball (114a) in contact with the upper surface of the horizontal displacement member 133 is made.

The second connection member 141 is connected to the lower rib 161a and the horizontal displacement member 133 of the H-shaped steel 161, respectively. Thus, the second connection member 141 serves to transfer the horizontal load applied to the electrical equipment to the horizontal displacement member 133 when the horizontal vibration occurs.

The H-shaped steel 161 is padded and coupled in a lying state along the lower circumference of the electrical installation. The H-shaped steel 161 provided in this way can be easily procured by utilizing ready-made products, and helps to connect and support the electrical equipment and the base isolation device of the present invention in a very stable manner.

A plurality of insulating pads 171 are provided therebetween so as not to directly contact the H-shaped steel 161 and electrical equipment. In this way, the electricity leaking out of the electrical installation to the isolation device according to the present invention can be prevented from flowing, thereby preventing the risk of electric shock and the problem of weakening the durability of the isolation device.

The operation and operation of the seismic isolator for an electric installation according to the present invention configured as described above will be described in detail with reference to the accompanying drawings along with FIGS. 11A to 11C. 11A to 11C are a series of reference diagrams for explaining the operation of the base isolation device according to the embodiment of the present invention when a horizontal vibration occurs due to an earthquake or wind load.

First, a horizontal vibration occurs due to a weak earthquake or wind load, and less than a certain horizontal load is applied to the electrical installation. At this time, the load applied to the electrical equipment is transmitted to the horizontal displacement member 133 through the H-shaped steel 161 and the second connection member 141, so that the horizontal displacement member 133 tends to be displaced in the horizontal direction. However, the horizontal displacement member 133 having such a tendency is restrained by the friction force between the first friction pad 121 and the second friction pad 122 and is maintained as it is without displacement as shown in FIG. 11A.

On the other hand, when a horizontal vibration occurs due to a strong earthquake and the horizontal load is applied to a certain level or more, the horizontal displacement member 133 is the horizontal displacement member 133 is the first friction pad 121 and the second Despite the frictional force between the friction pads 122, they are displaced in the horizontal direction as shown in FIG. 11B or 11C. However, in this process, vibration energy in the horizontal direction is effectively dissipated by friction attenuation between the first friction pad 121 and the second friction pad 122.

At this time, since no deformation or damage occurred in the seismic isolation device of the present invention due to the horizontal displacement of the horizontal displacement member 133, the horizontal displacement member 133 may be restored to its original position as shown in FIG. 11A. To this end, loosen the nut 113a of the first connection member 113 connecting the lower fixing member 111 and the upper fixing member 112 to release the contact of the ball bearing 114 with the horizontal displacement member 133. In one state, the horizontal displacement member 133 may be moved to its original position.

On the other hand, the isolating device according to an embodiment of the present invention is an ideal type of isolating device by having the components for controlling the vertical vibration typically together. Such additional components for controlling the vertical vibration include a second compression spring 142, a third compression spring 151. With these additional components, it is an ideal type of seismic device that can prepare for both horizontal and vertical vibration by clearly separating the function into a part for exclusively controlling horizontal vibration and a part for exclusively controlling vertical vibration. Since the horizontal vibration control part and the vertical vibration control part are clearly separated, there is an advantage that the design is easy. The following describes the additional components that must be provided to control the vertical vibration.

First, under the condition that the second compression spring 142 and the third compression spring 151 are installed, the upper end and the lower end of the second connection member 141 respectively have lower ribs 161a of the H-shaped steel 161. ) And the horizontal displacement member 133 should be installed in a simple penetrated state without fastening. In this state, the second compression spring 142 and the third compression spring 151 are fitted to the second connection member 141 on the lower and upper sides of the lower rib 161a of the H-shaped steel 161, respectively. This is installed.

According to such a configuration, the vertical support for the electrical equipment reaching the horizontal displacement member 133 is entirely in charge of the second compression spring 142 and the third compression spring 151 instead of the second connection member 141. do. However, the second connection member 141 serves to transfer the horizontal load applied to the electrical equipment to the horizontal displacement member 133 when the horizontal vibration occurs and the second compression spring 142 and the third compression spring ( 151 serves to restrain the departure.

In addition, between the H-shaped steel 161 and the horizontal displacement member 133, a pair of first spring caps 142a and 142b for accommodating the second compression spring 142 at the top and the bottom thereof may be used for the second connection member. 141 is provided in a form fitted through. The lower one of the pair of first spring caps 142a and 142b is formed in an open box shape at the upper part, and the upper one is formed in a box shape in which the lower part is opened, and is elastically coupled to each other.

Further, the nut 141a and the plate washer 153 are not disposed on the upper end of the second connection member 141 penetrating the lower rib 161a of the H-shaped steel 161 so that the third compression spring 151 is not separated. Is fastened, and below it, a second spring cap 152 surrounding the third compression spring 151 from the outside is provided.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

111: lower fixing member 112: upper fixing member
113: first connecting member 114: ball bearing
121: first friction pad 122: second friction pad
131: pressure member 132: first compression spring
133: horizontal displacement member 141: second connection member
161: H-shaped steel 171: insulation pad

Claims (11)

In the seismic isolator for electrical equipment installed between the lower part of the electrical equipment and the ground,
A lower fixing member 111 fixed to the ground;
An upper fixing member 112 connected to the lower fixing member 111 at an upper side by a first connection member 113;
The second connection member 141 is connected to the lower side of the lower side of the electrical equipment and connected to the lower, and installed so as to be displaceable in the horizontal direction between the lower fixing member 111 and the upper fixing member 112 is the electrical A horizontal displacement member 133 which is displaced together during horizontal displacement of the installation;
An urging member 131 elastically supported at a lower portion of the horizontal displacement member 133 and urging toward the lower fixing member 111;
It is fixed to the upper surface of the lower fixing member 111 and the lower surface of the pressing member 131, respectively, is continuously pressed by the pressing member 131 is in friction contact with each other, the horizontal displacement member 133 and the pressing member ( Constrain the horizontal displacement of the horizontal displacement member 133 and the pressing member 131 for less than a certain horizontal load applied through the 131, and for the horizontal load of more than a predetermined horizontal displacement member 133 and the pressing member A first friction pad 121 and a second friction pad 122 for inducing friction attenuation while allowing horizontal displacement of the 131;
An electrical device including a sliding member installed at the upper fixing member 112 and contacting the upper surface of the horizontal displacement member 133 while suppressing an upward displacement of the horizontal displacement member 133 while allowing a horizontal displacement. Isolation device for equipment. The method of claim 1,
The pressing member 131 is elastically supported by the first compression spring 132 to the lower portion of the horizontal displacement member 133 to increase the friction between the first friction pad 121 and the second friction pad 122 Isolation device for electrical equipment, characterized in that the giving. The method of claim 2,
The first connection member 113 is provided with a steel bar formed on the outer circumferential surface and penetrates the lower fixing member 111 and the upper fixing member 112, and nuts at the upper end and the lower end of the first connecting member 113, respectively. Is fastened to adjust the separation between the lower fixing member 111 and the upper fixing member 112,
When the separation between the lower fixing member 111 and the upper fixing member 112 is narrowed, the friction force between the first friction pad 121 and the second friction pad 122 is further increased, characterized in that Device. The method of claim 3,
The horizontal displacement member 133, the upper portion is made of a disc shape, but gradually decreases in width toward the lower portion of the main body portion 133a having an inverted triangular cross section, respectively from the top and left and right of the main body portion 133a A coupling portion 133c extending in a bar shape and coupled to the second connection member 141, and a chamber portion 133b in a box shape extending downward from the lower portion of the main body portion 133a to be opened. under,
The pressing member 131 has a box shape with an open upper portion, and the seismic isolator for the electric equipment can be vertically retracted in a state where a part is inserted into the chamber portion 133b of the horizontal displacement member 133. . 5. The method of claim 4,
A plurality of first protrusions 133d into which the upper end and the lower end of the first compression spring 132 are fitted to correspond to each other in the chamber 133b of the horizontal displacement member 133 and the inside of the pressing member 131; A seismic isolator for electrical installations, characterized in that the second projection (131a) is provided. The method of claim 3,
The first friction pad 121 is wider than the second friction pad 122, and the second friction pad 122 is disposed due to the horizontal displacement of the horizontal displacement member 133 and the pressing member 131. ) Is a seismic isolation device for an electric equipment, characterized in that not to leave the area of the first friction pad (121). The method of claim 1,
The sliding member is rotatably received in the lower portion of the bearing body (114b) and the bearing body (114b) fixed to the upper fixing member 112, the rolling contact with the upper surface of the horizontal displacement member (133) A seismic isolator for electrical installations, characterized in that the ball bearing 114 comprises a rolling ball (114a). The method of claim 1,
The lower fixing member 111 is a disk portion 111a having a disc shape, and an extension portion extending from the disk portion 111a to the front side and the rear side in the form of a bar, respectively, to be coupled to the first connection member 113 ( Isolation device for electrical installations, characterized in that consisting of 111c). 9. The method of claim 8,
A seismic isolator for electrical installations, characterized in that a recessed seating portion 111b is formed on an upper surface of the disk portion 111a so that the first friction pad 121 is seated. The method of claim 1,
H-shaped steel 161 is padded and coupled to the lower portion of the electrical installation in a lying state,
The second connecting member 141 is provided with a steel bar formed on the outer circumferential surface, the upper end and the lower end of the electrical equipment, characterized in that connecting the lower rib and the horizontal displacement member 133 of the H-shaped steel 161, respectively Device. The method of claim 10,
An isolation device for electrical installations, characterized in that a plurality of insulating pads (171) for blocking the current is further installed between the upper rib and the electrical installation of the H-shaped steel (161).

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