KR102485198B1 - Vibration attenuation device for gas insulated switchgear - Google Patents

Abstract

The present invention relates to a vibration reduction device for a gas insulated switchgear. A first frame 30 supported on the ground, a pad 50 seated on the first frame 30, and a second frame 40 seated on the pad 50 and installed with a gas insulated switchgear And a nut together with an insulating washer 66 fastened to the second frame 40, relatively movable, and at the same time penetrating the pad 50 and the first frame 30 and in close contact with the first frame 30. It may include a bolt 60 fastened to (67, 68). A collar 70 made of a shock-absorbing material may be installed on a portion of the bolt body 64 of the bolt 60 positioned within the pad 50. A jack-up block 80 is fastened to the front end of the bolt body 64 with the washer 66 and nuts 67 and 68 removed, so that the height of the first frame 30 can be increased.

Description

Vibration attenuation device for gas insulated switchgear}

The present invention relates to a vibration reduction device for a gas insulated switchgear.

Gas insulated switchgear is used in power systems such as transformation and transmission. A gas insulated switchgear is used for opening and closing, grounding, branching, monitoring, etc. of high-voltage electric pathways of thousands of volts to tens of thousands of volts in a power system.

For example, a gas insulated switchgear of a substation is constructed by embedding a circuit breaker, a disconnecting switch, an earthing switch, and a busbar and branch circuit in a grounded metal enclosure. An insulating gas having good insulating and arc extinguishing characteristics is filled in the enclosure.

When such a gas insulated switchgear is installed on the ground of a substation, transmission of vibration should be prevented. To this end, a pad made of an elastic material is installed between the ground of the substation and the frame where the gas insulated switchgear is installed to block the transmission of shock to reduce vibration.

As shown in FIG. 1 , the gas insulated switchgear 1 is supported on a base frame 7 by a plurality of support legs 3 . The base frame 7 is installed on a foundation frame 5 installed on the substation floor with a plurality of pads 9 interposed therebetween. The pad 9 is fixed to the foundation frame 5 and the base frame 7 with a plurality of stud bolts 10.

However, the pad 9 may deteriorate with prolonged use, so replacement may be required. To replace the pad 9, lift the base frame 7 on which the gas insulated switchgear 1 is installed, replace the pad 9, and then lower the base frame 7 again so that it is installed on the ground of the substation. However, since the pad 9 is fastened between the foundation frame 5 and the base frame 7 using a plurality of stud bolts 10, replacement work is very inconvenient.

In addition, the base frame 7 and the foundation frame 5 with the gas insulated switchgear installed are made in the factory and moved to the installation site in an assembled state to be fixedly installed. The transfer and installation work is performed with the pad 9 positioned between the base frame 7 where the gas insulated switchgear 1 is installed. During movement, the gap between the foundation frame 5 and the base frame 7 In order to prevent damage to the pad 9 due to relative movement, the base frame 7 should be lifted relative to the foundation frame 5 . However, in the prior art, there was an inconvenient point in that a separate jack-up device had to be used.

Japanese Patent Publication No. Heisei 06-311613 Japanese Patent Publication No. Heisei 06-351116 Japanese Laid-open Patent No. 2002-253521

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An object of the present invention is to solve the conventional problems as described above, to minimize the transmission of shock between the first frame installed on the ground and the second frame where the gas insulated switchgear is installed.

An object of the present invention is to facilitate replacement of a pad positioned between the first frame and the second frame.

An object of the present invention is to be able to transfer the pad in a state where the gap between the first frame and the second frame is higher than the height of the pad.

According to a feature of the present invention for achieving the above object, the present invention provides a first frame seated on the ground, a pad seated on the first frame and configured to absorb vibration, and a pad positioned on the pad And a second frame to which the gas insulated switchgear is mounted, and a bolt passing through the second frame and movably fastened to the second frame and passing through the pad and the first frame and fastened with a nut, The bolt includes a bolt head and a bolt body, and a collar made of a shock absorbing material may be installed at a portion of the bolt body positioned in the pad.

The second frame may include a fastener having a threaded portion formed on an inner surface so that the bolt penetrates and is fastened.

A first through hole is formed in the first frame at a position corresponding to the fastener of the second frame, through which the bolt may pass.

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The collar may be configured to surround the bolt body.

As the nut is fastened to the bolt, an insulating washer may be installed on the bolt so as to be in close contact with the first frame.

A plurality of the nuts may be used.

A jack-up block is fastened to the front end of the bolt body of the bolt in a state supported by the first frame, and the distance between the first frame and the second frame can be adjusted while the jack-up block and the bolt integrally rotate.

When the center of the jack-up block is made of a plane, when the edge of the jack-up block may be made of a curved surface.

The vibration reduction device for gas insulated switchgear according to the present invention may have at least one or more of the following effects.

First, in the present invention, a pad for absorbing shock is positioned between the first frame and the second frame, and a bolt is installed through the first frame, the second frame, and the pad, and the bolt is fastened to the second frame. It can be. According to this configuration, the pad can be accurately positioned between the first frame and the second frame and absorb shock. Therefore, transmission of shock between the first frame and the second frame is blocked, and thus vibration generated by transmission of shock generated in the gas insulated switchgear to the outside through the ground can be prevented.

In the present invention, bolts penetrating the first frame, the second frame, and the pad are screwed to the second frame, and the relative distance between the first frame and the second frame can be adjusted by rotation of the bolt. . Therefore, when the bolt is rotated while being supported by the jack-up block installed on the first frame and the second frame is raised relative to the first frame, it is easy to replace the pad located between the first frame and the second frame. can do it

Further, in the present invention, a through portion formed in the pad through which the bolt passes may be formed at an edge of the pad so that one side is open. Since the penetrating portion is open to one side of the pad, the replacement of the pad can be easily performed by adjusting the distance between the first frame and the second frame with the bolt.

In addition, the jack-up block installed in the first frame is fastened to the end of the bolt, so that the distance between the first frame and the second frame is greater than the height of the pad. In this way, it is possible to obtain an effect of simultaneously transporting the first frame and the second frame equipped with the gas insulated switchgear in a state in which the pad is not subjected to external force by the first frame and the second frame.

1 is a front view showing a configuration in which a general gas insulated switchgear is supported;
Figure 2 is a perspective view showing important parts of a preferred embodiment of a vibration reduction device for a gas insulated switchgear according to the present invention.
Figure 3 is a schematic cross-sectional view showing the configuration of a preferred embodiment of the vibration reduction device shown in Figure 2;
Figure 4 is a perspective view showing a state of maintaining a distance between the first frame and the second frame in the vibration reduction device of the present invention.
Figure 5 is a cross-sectional view showing a configuration corresponding to Figure 4;
6 (a) and (b) are perspective views showing modifications of pads that can be used in embodiments of the present invention.
Figure 7 (a), (b), (c) is a perspective view showing various modifications of the pad that can be used in the embodiment of the present invention.
Figure 8 (a) is a perspective view showing the configuration of the jack-up block used in the present invention.
Figure 8 (b) is a front view showing the configuration of the jack-up block used in the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment of the present invention, the detailed description will be omitted.

Also, terms such as first, second, A, B, (a), and (b) may be used in describing components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

A preferred embodiment of the vibration reduction device of the present invention will be described with reference to the drawings. First, FIGS. 2 to 5 show only important parts of the apparatus of the present invention, the configuration of the gas insulated switchgear is omitted for convenience, and only parts of the first frame 30 and the second frame 40 are shown.

The first frame 30 is to be seated on the ground, and in the illustrated embodiment, the cross section may be a shape obtained by rotating the 'H' character 90 degrees, as can be seen in FIG. 2 . In the first frame 30 , the first lower plate 33 may be positioned at the lower end of the plate-shaped first support plate 31 . The first lower plate 33 may be seated on the ground. The first lower plate 33 and the first support plate 31 may be orthogonal to each other. A first top plate 35 may be positioned at an upper end of the first support plate 31 . The first upper plate 35 may be parallel to the first lower plate 33 . The first support plate 31 , the first lower plate 33 , and the first upper plate 35 may be formed to elongate. In the drawing, only a part of the first frame 30 is shown.

A first through hole 37 may be formed through one side of the first top plate 65 of the first frame 30 . The first through hole 37 is a portion through which the bolt body 64 of the bolt 60 to be described below passes. The inner diameter of the first through hole 37 may be equal to or slightly larger than the outer diameter of the collar 70 to be described below.

The second frame 40 may be installed at a predetermined distance from the first frame 30 with the pad 50 to be described below positioned on the first frame 30 . A gap may be maintained between the first frame 30 and the second frame 40 by the pad 50 .

The configuration of the second frame 40 may be the same as or similar to that of the first frame 30 . In the drawings of this specification, the configurations of the first frame 30 and the second frame 40 are similarly drawn. A gas insulated switchgear may be directly or indirectly installed on the second frame 40 . The second frame 40 has a second support plate 41, and a second lower plate 43 is orthogonal to the lower portion of the second support plate 41, and parallel to the second lower plate 43, a second An upper plate 45 may be positioned orthogonally to an upper end of the second support plate 41 .

The second lower plate 43 of the second frame 40 has a fastener 47 at a position corresponding to the first through hole 37 formed in the first upper plate 35 of the first frame 30. can A second through hole 47' may be formed through the fastener 47 and the second lower plate 43. The bolt body 64 of the bolt 60 to be described below may pass through the second through hole 47'. A threaded portion 48 may be formed on an inner surface of the second through hole 47 ′ formed by penetrating the fastener 47 and the second lower plate 43 . As another example of the fastener 47, a kind of nut may be used as the fastener 47. That is, the second through hole 47 'is formed through the second lower plate 43, and the fastener 47, which is a nut concentrically with the center of the second through hole 47', is attached to the second lower plate ( 43) can be combined.

The pad 50 may be positioned between the first frame 30 and the second frame 40 . The pad 50 may block transmission of impact between the first frame 30 and the second frame 40 . The pad 50 may be made of a material capable of absorbing shock, for example, it may be made of an elastic material. Penetrating portions 52 may be formed by vertically penetrating the pad 50 . The through part 52 may be formed at a position corresponding to the first through hole 37 and the second through hole 47'. A bolt body 64 of a bolt 60 to be described below may be positioned in the through portion 52.

The penetrating portion 52 formed in the pad 50 may be formed in various positions of the pad 50 . 6 and 7 show various modifications of the pad 50 in which the position and number of the through portions 52 are varied. In (a) of FIG. 6 , a penetrating portion 52 is formed through one edge of the hexahedron-shaped pad 50 vertically and open to one side of the pad 50 . When the through portion 52 is formed in this way, when replacing the pad 50 , the bolt 60 to be described below may not need to be separated from the first frame 30 and the second frame 40 .

In (b) of FIG. 6 , the penetrating portion 52 is also formed on the opposite side of the pad 50 . In this case, the first frame 30 and the second frame 40 may be coupled using two bolts 60 . In this case, the pad 50 can be replaced only when at least one of the two bolts 60 is separated from the first frame 30 and the second frame 40 . Although not shown in the drawings, two through portions 52 may be formed at adjacent edges of the pad 50 . In this case, the pad 50 can be replaced without separating the bolt 60 from the first frame 30 and the second frame 40 .

7 (a) and (b) show a modified example in which the through portion 52 is formed at the corner of the pad 50 having a hexahedral shape. In (a) of FIG. 7, there is one through portion 52, and in (b) of FIG. 7, two through portions 52 are formed at adjacent corners. In this case, the pad 50 can be replaced without separating the bolt 60 from the first frame 30 and the second frame 40 .

In (c) of FIG. 7 , penetrating portions 52 are formed vertically through the center of the pad 50 . In this case, the pad 50 can be replaced only when the bolt 60 is separated from the first frame 30 and the second frame 40 .

A bolt 60 may be installed to fasten the first frame 30 and the second frame 40 to each other at the location where the pad 50 is located. The bolt 60 may include a bolt head 62 and a bolt body 64. A screw part may be formed on the outer surface of the bolt body 64, so that it may be fastened to the screw part 48 of the fastener 47. The opposite end of the bolt head 62 in the bolt body 64 passes through the first through hole 37 formed in the first top plate 35 of the first frame 30 to connect the nuts 67 and 68. can be concluded.

An insulating washer 66 and a flat washer 66' may be positioned between the nut 67 and the lower surface of the first top plate 35. The insulating washer 66 may be adhered to the bottom surface of the first top plate 35 by the flat washer 66'. The insulating washer 66 may also play a role of blocking shock transmission. The insulation washer 66 may be made of a material capable of absorbing impact.

Two nuts 67 and 68 are not necessarily used, but by using two nuts 67 and 68, it is possible to prevent the nuts 67 from loosening. A spring washer may be further installed between the nuts 67 and 68.

Meanwhile, the collar 70 may surround a portion of the bolt body 64 of the bolt 60 positioned within the through portion 52 of the pad 50. The collar 70 may serve to block transmission of an external impact between the first frame 30 and the second frame 40 through the bolt body 64 . The collar 70 may be made of a material capable of absorbing shock. The collar 70 has a function to block the bolt body 64 of the bolt 60 from being in contact with peripheral components to prevent impact from being transmitted. The collar 70 may cover at least a portion of the bolt body 64 . This is because even if the collar 70 covers only a part of the bolt body 64, it is possible to block direct contact between peripheral parts and the bolt body 64, thereby preventing shock transfer.

A jack-up block 80 may be positioned on the first lower plate 33 of the first frame 30 so that the front end of the bolt body 64 of the bolt 60 can be coupled. The jack-up block 80 may be used when lifting the second frame 40 to be separated from the pad 50 or when transferring the entire device.

In this embodiment, the jack-up block 80 may have a cylindrical shape. A fastening hole 82 may be formed to open to the upper surface of the jack-up block 80. A threaded portion 84 coupled to a threaded portion formed on an outer surface of the bolt body 64 may be formed on an inner surface of the fastening hole 82 . The shape of the jack-up block 80 may be a hexahedron or may have various shapes. The jack-up block 80 is fastened to the bolt body 64 and rotates integrally with the bolt 60 to form the first frame 30 and the second frame 40, more precisely, the first top plate 35 and The distance between the second lower plate 43 can be adjusted.

A direction in which the jack-up block 80 is fastened to the bolt body 64 may be opposite to a direction in which the bolt 70 is tightened to the fastener 47 of the second frame 40. In this way, when the jack-up block 80 is rotated together with the bolt 60, the fastening between the jack-up block 80 and the bolt 60 can be prevented from being released.

When the jack-up block 80 is rotated together with the bolt 60, in order to reduce friction with the first frame 30, the center of the lower surface of the jack-up block 80 is a plane 86, and the lower surface The edge of may be a curved surface (88). This allows the plane 86 to provide a minimum area for the jack-up block 80 to be stably built on the first frame 30, and the curved surface 88 to contact the first frame 30. It is possible to minimize the frictional force by preventing it from happening.

Hereinafter, the vibration reduction device of the gas insulated switchgear according to the present invention having the above configuration will be described as being used, installed, and used during transport.

2 and 3 are configurations when the apparatus of the present invention is installed in, for example, a substation. As shown here, the second frame 40 in which the gas insulated switchgear is installed may be installed on the first frame 30 seated on the ground with the pad 50 interposed therebetween. Here, the plurality of pads 50 may be distributed and located in several locations. In this way, the shock generated in the gas insulated switchgear can be absorbed by the pad 50 without being transferred from the second frame 40 to the first frame 30 .

Fastening the bolt 60 at the portion where the pad 50 is located will be described. The bolt body 64 of the bolt 60 is installed through the fastener 47 so as to pass through the second through hole 47' of the second frame 40. The bolt body 64 passes through the second through hole 47', passes through the through portion 52 of the pad 50, and penetrates through the first through hole 37 so that the front end of the first top plate (35) and the first lower plate (33).

In this state, the collar 70 is installed on the bolt body 64. The collar 70 may be installed by being lightly press-fitted into the bolt body 64 . The collar 70 is inserted through the first through hole 37 formed in the first top plate 35 of the first frame 30 and surrounds the bolt body 64 .

Next, when the insulating washer 66 and the flat washer 66' are installed and the nuts 67 and 68 are sequentially fastened, the state of FIGS. 2 and 3 can be obtained. In this state, the gas insulated switchgear may be operated.

On the other hand, it will be described that the second frame 40 is slightly raised away from the pad 50 . Loosen the nuts 67 and 68, and remove the insulating washer 66 and the flat washer 66'. Next, the bolt 60 is rotated relative to the fastener 47 of the second frame 40 so that the bolt 60 rises with respect to the second frame 40 .

When the bolt 60 is raised as a whole and a space in which the jack-up block 80 can be installed is secured between the front end of the bolt body 64 and the first lower plate 33, the jack-up block 80 It is positioned on the first lower plate 33, and the front end of the bolt body 64 is fastened to the fastening hole 82.

In this state, when the bolt 60 is rotated, the jack-up block 80 and the bolt 60 rotate integrally, and the bolt 80 is supported on the first lower plate 33 while the jack-up block 80 is supported on the first lower plate 33 If 60 continues to rotate in a direction in which the fastener 47 is tightened, the second frame 40 may be relatively elevated. As the second frame 40 rises, a gap is created between the pad 50 and the second frame 40, and the pad 50 is placed between the second frame 40 and the first frame. It can be pulled out between (30). Next, the pad 50 may be replaced. Such an operation may be sequentially performed at the location where each pad 50 is installed.

On the other hand, in a state where the pad 50 is positioned between the first frame 30 and the second frame 40, the first frame 30 and the second frame ( 40), the first frame 30 and the second frame 40 may be transported together while maintaining a distance greater than the height of the pad 50. Transfer in this state can be performed without damaging the pad 50 by an external force.

In the above, even though all the components constituting the embodiment according to the present invention have been described as being combined or operated as one, the present invention is not necessarily limited to these embodiments. That is, within the scope of the object of the present invention, all of the components may be selectively combined with one or more to operate. In addition, terms such as "comprise", "comprise" or "having" described above mean that the corresponding component may be present unless otherwise stated, and thus exclude other components. It should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present invention belongs, unless defined otherwise. Commonly used terms, such as terms defined in a dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and unless explicitly defined in the present invention, they are not interpreted in an ideal or excessively formal meaning.

The above description is merely an example of the technical idea of the present invention, and various modifications and variations can be made to those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

1: gas insulated switchgear 3: support leg
5: foundation frame 7: base frame
9: pad 10: stud bolt
30: first frame 31: first support plate
33: first lower plate 35: first upper plate
37: first through hole 40: second frame
41: second support plate 43: second lower plate
45: second upper plate 47: fastener
47 ': second through hole 48: screw part
50: pad 52: penetrating portion
60: bolt 62: bolt head
64: bolt body 66: insulation washer
67, 68: nut 70: collar

Claims (9)

A first frame seated on the ground;
a pad seated on the first frame and configured to absorb vibration;
A second frame positioned on the pad and equipped with a gas insulated switchgear;
A bolt passing through the second frame and movably fastened to the second frame and passing through the pad and the first frame and fastened with a nut,
The bolt includes a bolt head and a bolt body, a vibration reduction device of a gas insulated switchgear in which a collar made of a material absorbing shock is installed in a portion of the bolt body positioned in the pad.
[Claim 4] The vibration reducing device of a gas insulated switchgear according to claim 1, wherein the second frame is provided with a fastener having a threaded portion formed on an inner surface so that the bolt penetrates and is fastened.
[Claim 3] The device of claim 2, wherein a first through hole is formed in the first frame at a position corresponding to the fastener of the second frame, through which the bolt passes.
delete [Claim 4] The vibration reducing device of a gas insulated switchgear according to claim 3, wherein the collar is configured to surround the bolt body.
According to claim 1, Vibration reduction device of a gas insulated switchgear wherein an insulation washer is installed on the bolt to be in close contact with the first frame by fastening the nut to the bolt.
[Claim 7] The vibration reducing device of a gas insulated switchgear according to claim 6, wherein a plurality of nuts are used.
The method of any one of claims 1, 2, 3, 5, and 7, wherein a jack-up block is fastened to the tip of the bolt body of the bolt in a state supported by the first frame, and the jack-up block and a vibration reduction device of a gas insulated switchgear for adjusting a distance between the first frame and the second frame while the bolt integrally rotates.
[Claim 9] The device of claim 8, wherein a center of the lower surface of the jack-up block is formed of a flat surface, and an edge of the lower surface of the jack-up block is formed of a curved surface.

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