JPH06245336A - Damper for bushing connector - Google Patents

Abstract

PURPOSE:To provide a damper for bushing connector in which stress can be suppressed remarkably at the root of a ceramic insulator, while reducing manufacturing cost and facilitating maintenance and inspection, by canceling the work being done by seismic power acting on the bushing connector thereby enhancing the damping performance furthermore. CONSTITUTION:In the damper for bushing connector, lower flange 3 of a ceramic insulator 1 is coupled with the frame 5 through a spring mechanism 11. The spring mechanism 11 is rigid in the horizontal direction and can rock the ceramic insulator by 360 deg. around a fulcrum, i.e., the lower flange 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damping device for a bushing connecting device for a gas insulated switchgear for preventing damage to a porcelain porcelain tube during an earthquake.

[0002]

2. Description of the Related Art A conventional bushing connecting device of this type will be described with reference to FIG. In FIG. 7, 1 is a porcelain porcelain tube, 2 and 3 are upper and lower flanges of the porcelain porcelain tube 1, 4 is a grounding container connected to the porcelain porcelain tube 1 through the lower flange 3, and 5 is this connecting container 4. A pedestal to be supported, 6 is a power transmission line, 7 is a terminal of the power transmission line 6, 8 is a bushing conductor penetrating the inside of the porcelain porcelain tube 1, and 9 is a conductor connected to the bushing conductor 8. And 10 is a pedestal 5
Is the foundation that was installed.

The bushing connecting device is constructed as a rigid structure in which the ground container 4 is fixed on the mount 5.
With this rigid structure, the sway of the upper part of the porcelain porcelain tube 1 at the time of an earthquake is reduced, and the stress in the lower part of the porcelain porcelain tube 1 is suppressed. However, the seismic resistance was not sufficient with such a structure.

Therefore, the present applicant has already proposed a damping device for the bushing connecting device shown in FIG. 8 (Japanese Patent Application No. 41322).
No. 38). In the figure, 18 is an additional mass, 19 is a bar-shaped spring connected to the lower surface of the additional mass 18, 20 is a viscoelastic body made of rubber, and 21 is a container for storing them. The vibration damping device is attached to the upper flange 2 of the porcelain porcelain tube 1.

The operation of the vibration damping device will be described below.
Due to the earthquake, the mounting portion of the base 5 on the upper surface of the foundation 10 swings, and this swing is transmitted to the grounding container 4 via the base 5,
As a result, the porcelain insulator tube 1 swings. However, porcelain insulator tube 1
Has a tower-shaped cantilever structure, the upper flange 2 at the tip of the porcelain porcelain tube 1 to which the vibration damping device is attached vibrates greatly, but most of the frequency of this vibration is the primary bending natural frequency of the bushing connecting device. Is a component of. Therefore, the damping device attached to the upper flange 2 is
8 and the rod-shaped spring 19 are preconfigured to resonate at the primary bending natural frequency of the bushing connecting device,
Compared to the shake of the upper flange 2 caused by the seismic force, the additional mass 18 of the vibration damping device shakes several times as much, and the vibration energy is accumulated at this portion and the vibration energy is absorbed by the viscoelastic body 20. As a result, the damping performance of the bushing connecting device is improved and the runout is suppressed. This damping device was created using the dynamic vibration absorber theory of vibration engineering.

[0006]

However, the conventional damping device for the bushing connecting device has improved damping performance of the primary bending natural frequency of the bushing connecting device, but it is complicated as in the case of an earthquake. It is clear from seismic engineering that even if only damping performance is added to such transient vibration phenomena, there is only a limited vibration suppressing effect. In order to further improve the damping performance, it is necessary to make the additional mass 18 heavier, and since a heavy vibration damping device will be attached to the upper flange 2, there is a risk of damage due to an earthquake even if the vibration of the bushing connecting device becomes small. There was a problem that the stress at the root of the high porcelain porcelain tube 1 did not decrease. Further, in order to resonate with the primary bending natural frequency of the bushing connecting device, it is necessary to make the spring constant of the bar-shaped spring 19 very small. In this case, the bar-shaped spring 19 becomes very long or the bar-shaped spring 19 has a very long spring constant. There is a problem that it becomes difficult to maintain strength.

Since the seismic force may act from all directions, an isotropic spring constant and a damping constant are required, and a large movement is required. If you try to construct a vibration damping device with the spring of the structure of, the structure of the spring becomes very complicated,
Since there is no appropriate viscoelastic body 20 that can tolerate a large shake, a damping mechanism having a complicated structure is required, resulting in high manufacturing cost, further maintenance and inspection, and the mass of the entire vibration damping device. There is a problem in that it becomes heavy and the stress at the base of the porcelain porcelain tube 1 cannot be reduced.

The present invention has been made in order to solve the above problems, and cancels out the work done by the seismic force acting on the bushing connecting device, and further improves the damping performance, so that the stress generated at the root of the porcelain porcelain tube is improved. It is an object of the present invention to provide a vibration damping device for a bushing connecting device, which is capable of remarkably suppressing the above, is inexpensive to manufacture, and is easy to maintain and inspect.

[0009]

In the vibration damping device of the bushing connecting device according to claim 1 of the present invention, a spring mechanism for connecting the lower flange and the mount is interposed between the lower flange of the porcelain insulator tube and the mount. At the same time, this spring mechanism is rigid with respect to the horizontal plane, and is capable of swinging the porcelain porcelain tube in the direction of 360 ° about the lower flange as a fulcrum.

The damping device for a bushing connecting device according to a second aspect of the present invention is the vibration damping device according to the first aspect of the invention, in which a counterweight is attached to the lower surface of the grounding container.

Further, a vibration damping device for a bushing connecting device according to a third aspect of the present invention is the vibration damping device according to the second aspect, wherein a counterweight is attached to the lower surface of the grounding container via an elastic element. It is a thing.

A damping device for a bushing connecting device according to a fourth aspect of the present invention is the one according to the second aspect or the third aspect of the invention, in which a damping mechanism is attached to the counterweight. .

A vibration damping device for a bushing connecting device according to a fifth aspect of the present invention is the vibration damping device according to the fourth aspect, wherein the counterweight and the damping mechanism are located below the upper surface of the foundation. It is a thing.

According to a sixth aspect of the present invention, there is provided a vibration damping device for a bushing connecting device according to any one of the first to fifth aspects, wherein the spring constant of the spring mechanism is in the horizontal direction. Is more than twice the horizontal spring constant of the gantry, and the static spring constant of the upper part of the porcelain porcelain tube when the lower flange of the porcelain porcelain tube is rigidly supported in the swinging direction of 360 ° with the lower flange as the fulcrum It is configured by setting it to be smaller than twice the moment spring constant obtained by multiplying it by the square.

A vibration damping device for a bushing connecting device according to a seventh aspect of the present invention is the vibration damping device according to the third aspect of the invention, which is configured by a spring constant in a bending direction of the elastic element and a mass of a counterweight. The natural frequency is set to be at least twice the natural frequency when the lower flange of the porcelain porcelain tube is rigidly supported.

[0016]

According to the first aspect of the present invention, the lower flange of the porcelain porcelain tube is connected to the mount through the spring mechanism, and the horizontal direction of the spring mechanism is made rigid and its rotation direction is elastic. Since it is configured as a body, the upper part and the lower part of the bushing connecting device swing in opposite directions during an earthquake, canceling the work done by the seismic force acting on the bushing connecting device and improving the damping performance of the bushing connecting device. The stress acting on the porcelain porcelain tube can be reduced.

According to the second aspect of the present invention, in the first aspect of the invention, since the counterweight is attached to the lower surface of the grounding container, the work performed by the seismic force by the counterweight. Can be further canceled.

Further, according to the invention of claim 3 of the present invention, in the invention of claim 2, since the counterweight is attached to the lower surface of the grounding container via an elastic element, the counterweight is provided by this elastic element. As the runout of the counterweight increases, the runout of the counterweight can be further increased by the deformation of the elastic element to further cancel the work of the seismic force.

Further, according to the invention of claim 4 of the present invention, in the invention of claim 2 or 3,
Since the damping mechanism is attached to the counterweight, the damping effect can be imparted by the damping mechanism, and thus the vibration of the bushing connecting device during an earthquake can be further suppressed.

According to the invention of claim 5 of the present invention, in the invention of claim 4, since the counterweight and the damping mechanism are located below the upper surface of the foundation, the upper surface of the foundation is elevated. It is possible to reduce the height of the bushing connecting device.

According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the spring constant of the spring mechanism is such that the lateral direction of the gantry in the translation direction. Is more than twice the spring constant in the direction, and is twice the moment spring constant obtained by multiplying the static spring constant of the upper part of the porcelain porcelain tube by the square of the height when the lower part of the porcelain porcelain tube is rigidly supported in the rotating direction. Since it is also set to be small, the stress at the base of the porcelain porcelain tube can be remarkably reduced.

According to the invention described in claim 7 of the present invention, in the invention described in claim 3, the natural frequency constituted by the spring constant in the bending direction of the elastic element and the mass of the counterweight is: Since the lower frequency of the porcelain porcelain tube is set to twice or more the natural frequency when it is rigidly supported, the damping action of the damping mechanism can be effectively exhibited.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Based on the embodiments shown in FIGS. 1 to 6, the same or corresponding parts as in the prior art will be designated by the same reference numerals, and the description will focus on the characteristics of the present invention. FIG. 1 is a diagram showing an embodiment of a vibration damping device for a bushing connecting device of the present invention. FIG. 1 (a) is a sectional view showing the bushing connecting device, and FIG. 1 (b) is a sectional view of the bushing connecting device shown in FIG. The top view which shows the spring mechanism which comprises the principal part of a damping device, FIG. 2 is explanatory drawing for demonstrating the effect | action with respect to the bushing apparatus of an earthquake force, The figure (a) is the bushing shown in FIG. 1 shown in FIG. FIG. 1 is a diagram showing a case of a device, FIG. 3B is a diagram showing a case of a conventional bushing device, and FIG. 3 is equivalent to FIG. 1B showing another embodiment of a vibration damping device of a bushing connecting device of the present invention. FIG. 4 is a view showing still another embodiment of the vibration damping device of the bushing connecting device of the present invention.
FIG. 5 is a sectional view showing a main part of still another embodiment of a vibration damping device for a bushing connecting device of the present invention, and FIG. 6 is a sectional view of a vibration damping device for a bushing connecting device of the present invention. It is a figure corresponding to FIG. 5 which shows the principal part of another Example.

Embodiment 1. A bushing connecting device to which the vibration damping device of this embodiment is applied is, as shown in FIG.
Grounding container 4 supported by a pedestal 5 installed on a foundation 10
The high-voltage conductor 9 is housed inside and the electrical insulation between the high-voltage conductor 9 and the grounding container 4 is ensured by the insulating gas sealed in the grounding container 4, and the electrical insulation of the exposed part in the air is grounded as described above. It is performed by the porcelain porcelain tube 1 connected to the container 4, and is used as an insulating device of a gas insulated switchgear.

In the vibration damping device of this embodiment, as shown in the figure, a spring mechanism 11 is interposed between the lower flange 3 of the porcelain porcelain tube 1 and the pedestal 5. This spring mechanism is rigid with respect to the horizontal plane, and with the lower flange as the fulcrum, 3
The porcelain porcelain tube 1 can be swung in the direction of 60 °. Then, as shown in FIG. 1B, the spring mechanism 11 is formed as a metal flange, and a plurality of recesses 11A are formed at equal intervals in the circumferential direction thereof. It is configured to be a structure. Further, in the case of the vibration damping device of the present embodiment, as shown in the figure, the counterweight 12 is attached to the lower surface of the grounding container 4 so as to form a rigid structure.

Next, the operation will be described. When horizontal shake acts on the mounting portion of the pedestal 5 with respect to the upper surface of the foundation 10 during an earthquake, this shake is transmitted to the bushing connecting device via the gantry 5 and the bushing connecting device shakes. At this time, since the seismic force applied in the height direction of the bushing acts in the same direction in proportion to the mass distribution of the bushing connecting device, the work due to the seismic force is the product of the mass distribution of the bushing connecting device and the bending natural frequency mode. Given in.
Therefore, the larger this value, the greater the vibration of the bushing connecting device. Since the work of this seismic force is large in the mode of the primary bending natural frequency of the bushing connecting device and is small in the higher order mode, the vibration generated in the bushing connecting device during an earthquake is the primary bending natural frequency. The component of becomes dominant.

The mass distribution of the bushing connecting device shown in FIG. 1, the mode of the natural bending frequency of the first order, and the work distribution of the seismic force determined by these are shown in FIG. 2 (a). It should be noted that (b) of the same figure corresponds to (a) of the same figure for a conventional bushing connecting device to which the vibration damping device of this embodiment is not applied. In the bushing connecting device to which the vibration damping device of this embodiment is applied, the lower flange 3 of the porcelain porcelain tube 1 is rigid in the translational direction, but is supported by the spring mechanism 11 which is elastically configured in the rotational direction. The deflection of the bushing connecting device in the upper part and the lower part of the bushing connecting device are opposite to each other with the attachment portion of the spring mechanism 11 as a boundary, and the work distribution of the seismic force is canceled between the upper portion and the lower portion of the attachment portion of the spring mechanism 11. become. Further, since the counterweight 12 is attached to the lower part of the bushing connecting device, that is, the lower surface of the grounding container 4, the work of the seismic force is largely canceled. On the other hand, in the case of the conventional bushing connecting device, the mode of the bending natural frequency of the first order is larger in the upper part of the bushing connecting device, and the movement is larger in the upper part, and the lower part is in the same direction as the upper part. All work done by movement and seismic force acts in the direction of addition. Therefore, it is understood that the bushing device to which the vibration damping device of this embodiment is applied is excellent in suppressing vibration.

Next, the stress reducing action at the root of the porcelain porcelain tube 1 which may be damaged during an earthquake will be described.
Since the stress generated by the bending deformation of the beam-shaped porcelain porcelain tube 1 is generated in proportion to the curvature that is the second derivative of the displacement, (a) in FIG.
In the mode in which the vibration damping device is attached to the present embodiment shown in Fig. 6, no stress is generated in the rigid displacement component indicated by the broken line generated by supporting the bushing connecting device by the elastic spring mechanism 11 in the rotation direction. No, 1/2 the displacement of the upper part of the porcelain insulator tube 1
Is the rigid displacement. Therefore, even if the vibration of the upper part of the porcelain porcelain tube 1 at that time is the same as the vibration of the upper part of the porcelain porcelain tube 1 of the conventional bushing connecting device, the stress at the base of the porcelain porcelain tube 1 is reduced.

Therefore, the spring constant of the spring mechanism 11 is made more rigid than twice the spring constant in the lateral direction of the gantry 5 in the translational direction,
In the direction of rotation, by setting the static spring constant of the upper part of the porcelain porcelain tube 1 when the lower flange 3 is rigidly supported by multiplying the square of the height by less than twice the moment spring constant The stress at the base of the porcelain porcelain tube 1 can be remarkably reduced.

As described above, according to this embodiment, the lower flange 3 of the porcelain porcelain tube 1 is attached to the mount 5 by the spring mechanism 1.
Since the spring mechanism 11 is connected through 1 and the translation direction of the spring mechanism 11 is rigid and the rotation direction thereof is an elastic body,
By canceling the work done by the seismic force acting on the bushing connecting device and further improving the damping performance, the stress generated at the base of the porcelain porcelain tube 1 can be significantly suppressed, and the spring mechanism 11 having a simple structure can be used. Also, since it is only necessary to attach the counterweight 12, the vibration damping device can be manufactured at low cost and can be easily maintained and inspected.

Embodiment 2 The vibration damping device of this embodiment is different from the spring mechanism 11 of the first embodiment in that the spring mechanism 1 shown in FIG.
The configuration is the same as in Example 1 except that 3 is used. That is, as shown in the figure, the spring mechanism 11 used in this embodiment has an outer pressing ring 11B and an inner pressing ring 11B.
C and a leaf spring 11D interposed between the rings 11B and 11C. By using the leaf spring 11D as described above, damping against the deformation of the spring can be imparted, the damping performance of the bending primary natural frequency of the bushing can be improved, and the vibration of the bushing connecting device during an earthquake can be improved. Can be smaller. Therefore, according to the present embodiment, it is possible to provide the vibration damping device that is more excellent in the vibration suppressing effect than the case of the first embodiment, and it is possible to expect the same effect as the first embodiment. Although the damping effect is imparted by the leaf spring 11D in this embodiment, even if the rigid metal flange is supported by the disc spring, the spring mechanism 1 is rigid in the translational direction and elastic in the rotational direction.
A damping effect of 1 can be added.

Embodiment 3 The vibration damping device of this embodiment is constructed according to Embodiment 1 except that the structure of the counterweight 12 in Embodiment 1 is different. That is, in the present embodiment, the counterweight 12 is, as shown in FIG.
It is connected to the lower surface of the grounding container 4 via an elastic rod 13 as an elastic element, and is supported by the viscous body 14 while being immersed in a counterweight cover 15 containing a viscous body 14 as a damping mechanism. There is. Further, if the spring constant of the cantilever of the elastic rod 13 is made too weak, the damping action of the viscous body 14 cannot be effectively exhibited, so that the elastic constant of the cantilever of the elastic rod 13 and the mass of the counterweight 12 are used. The natural frequency is
It is necessary to set the bending frequency to twice or more the primary bending natural frequency when the porcelain insulator tube 1 is rigidly supported by the lower flange 3.

Therefore, according to the present embodiment, the deflection of the counterweight 12 in the primary bending natural frequency mode of the bushing connecting device is enlarged and the deflection of the counterweight 12 is further increased by the deformation of the elastic rod 13. Since the work of the seismic force can be further canceled and the damping effect can be imparted by the viscous body 14, the vibration of the bushing connecting device at the time of earthquake can be further suppressed. Although the counterweight 12 is located above the upper surface of the foundation 10 in this embodiment, a pit is provided in the foundation 10 and the counterweight cover 15 is installed on the bottom surface of the pit. With the same configuration, the height of the bushing connecting device above the upper surface of the foundation 10 can be reduced.

Embodiment 4 The vibration damping device of the present embodiment is constructed in accordance with Embodiment 3 except that the structure of the counterweight 12 in Embodiment 3 is different. In this embodiment,
The counterweight cover 15, as shown in FIG. 5,
It is formed so as to surround the elastic rod 13 in the third embodiment, the upper end thereof is directly connected to the lower surface of the grounding container 4, and the viscous body 14 is put in the bottom portion thereof. Therefore, according to the present embodiment, the vibration damping device can be easily attached to the bushing connecting device, and at the same time, the same effects as those of the above embodiments can be expected.

Embodiment 5 As shown in FIG. 6, in the vibration damping device of this embodiment, the elastic rods 13 in Embodiments 3 and 4 are omitted, and the counterweight 12 is laid on the bottom surface of the counterweight cover 15. It is arranged according to the third embodiment except that the counterweight 12 is mounted on the sheet 16 made of a fluororesin such as tetrafluoroethylene resin and the counterweight 12 is supported by the viscous body 14 and the coil spring 17. There is. Therefore, according to the present embodiment, the height of the vibration damping device can be shortened and the vibration damping device can be made compact.

[0036]

As described above, according to the present invention, the spring mechanism for connecting the lower flange and the frame is interposed between the lower flange of the porcelain porcelain tube and the frame, and the spring mechanism is arranged on the horizontal plane. On the other hand, it is rigid, and the porcelain porcelain tube can be swung in the direction of 360 ° with the lower flange as a fulcrum, so that the work done by the seismic force acting on the bushing connecting device is canceled out, By improving the damping performance, it is possible to significantly suppress the stress generated at the root of the porcelain porcelain tube, and it is possible to provide a vibration damping device for the bushing connecting device which is inexpensive to manufacture and easy to maintain and inspect.

According to the second aspect of the present invention, since the counterweight is attached to the lower surface of the grounding container in the first aspect of the invention, the work performed by the seismic force is further exerted by the counterweight. Can be further canceled.

Further, according to the invention of claim 3 of the present invention, in the invention of claim 2, since the counterweight is attached to the lower surface of the grounding container via an elastic element, the counterweight is provided by this elastic element. As the runout of the counterweight increases, the runout of the counterweight can be further increased by the deformation of the elastic element to further cancel the work of the seismic force.

Further, according to the invention of claim 4 of the present invention, in the invention of claim 2 or 3,
Since the damping mechanism is attached to the counterweight, the damping effect can be imparted by the damping mechanism, and thus the vibration of the bushing connecting device during an earthquake can be further suppressed.

Further, according to the invention of claim 5 of the present invention, in the invention of claim 4, the counterweight and the damping mechanism are located below the upper surface of the foundation, so The height of the bushing connecting device can be reduced.

Further, according to the invention described in claim 6 of the present invention, in the invention described in any one of claims 1 to 5, the spring constant of the spring mechanism is that of the pedestal in the horizontal direction. If the lower flange of the porcelain porcelain tube is rigidly supported in the swing direction of 360 ° with the lower flange as the fulcrum, it is twice the spring constant in the horizontal direction. Since it is set to be smaller than twice the moment spring constant obtained by multiplication, the stress at the root of the porcelain porcelain tube can be remarkably reduced.

According to the invention described in claim 7 of the present invention, in the invention described in claim 3, the natural frequency constituted by the spring constant in the bending direction of the elastic element and the mass of the counterweight is: Since the lower frequency of the porcelain porcelain tube is set to twice or more the natural frequency when it is rigidly supported, the damping action of the damping mechanism can be effectively exhibited.

[Brief description of drawings]

1A and 1B are views showing an embodiment of a vibration damping device for a bushing connecting device of the present invention, wherein FIG. 1A is a sectional view showing the bushing connecting device, and FIG. 1B is a vibration damping device for the bushing connecting device. FIG. 3 is a plan view showing a spring mechanism that constitutes a main part of FIG.

2A and 2B are explanatory views for explaining the action of the seismic force on the bushing device. FIG. 2A shows the case of the bushing device shown in FIG. 1, and FIG. 2B shows the case of a conventional bushing device. FIG.

FIG. 3 is a view corresponding to FIG. 1 (b) showing another embodiment of the vibration damping device of the bushing connecting device of the present invention.

FIG. 4 is a view corresponding to FIG. 1 showing still another embodiment of the vibration damping device of the bushing connecting device of the present invention.

FIG. 5 is a cross-sectional view showing a main part of still another embodiment of the vibration damping device of the bushing connecting device of the present invention.

FIG. 6 is a view corresponding to FIG. 5, showing a main part of still another embodiment of the vibration damping device of the bushing connecting device of the present invention.

FIG. 7 is a cross-sectional view showing an example of a conventional bushing connecting device.

FIG. 8 is a cross-sectional view showing an example of a vibration damping device of a conventional bushing connecting device.

[Explanation of symbols]

 1 Porcelain Insulator 3 Lower Flange 4 Grounding Container 5 Stand 9 High Voltage Conductor 10 Foundation 11 Spring Mechanism 12 Counterweight 13 Elastic Rod (Elastic Element) 14 Viscous Body (Dampening Mechanism)

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[Procedure amendment]

[Submission date] December 7, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

[0009]

In the vibration damping device of the bushing connecting device according to claim 1 of the present invention, a spring mechanism for connecting the lower flange and the mount is interposed between the lower flange of the porcelain insulator tube and the mount. At the same time, this spring mechanism is rigid with respect to the horizontal plane, and is capable of swinging the porcelain porcelain tube in the direction of 360 ° about the lower flange as a fulcrum. In addition, according to claim 2 of the present invention.
The damping device for the bushing connecting device is the vibration damping device according to claim 1.
In Ming, it was constructed by adding a damping mechanism to the spring mechanism.
It is a thing.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

The vibration damping device for a bushing connecting device according to a third aspect of the present invention is the vibration damping device according to the first or second aspect of the invention, in which a counterweight is attached to the lower surface of the grounding container. .

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

A damping device for a bushing connecting device according to a fourth aspect of the present invention is the vibration damping device according to the third aspect , wherein a counterweight is attached to the lower surface of the grounding container via an elastic element. It is a thing.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

Further, a vibration damping device for a bushing connecting device according to a fifth aspect of the present invention is the vibration damping device according to the third or fourth aspect , wherein a damping mechanism is attached to the counterweight. .

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

A vibration damping device for a bushing connecting device according to a sixth aspect of the present invention is the vibration damping device according to any one of the third to fifth aspects.
In the slightly described invention, there is a counterweight
There is one that is configured by positioning below the upper surface of the basis of the damping mechanism.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

The damping device for a bushing connecting device according to a seventh aspect of the present invention is the vibration damping device according to any one of the first to sixth aspects, wherein the spring constant of the spring mechanism is in the horizontal direction. Is more than twice the horizontal spring constant of the gantry, and the static spring constant of the upper part of the porcelain porcelain tube when the lower flange of the porcelain porcelain tube is rigidly supported in the swinging direction of 360 ° with the lower flange as the fulcrum It is configured by setting it to be smaller than twice the moment spring constant obtained by multiplying it by the square.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

A vibration damping device for a bushing connecting device according to an eighth aspect of the present invention is the vibration damping device according to the fourth aspect of the invention, which includes a spring constant in a bending direction of the elastic element and a mass of a counterweight. The natural frequency is set to be at least twice the natural frequency when the lower flange of the porcelain porcelain tube is rigidly supported.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

[0016]

According to the first aspect of the present invention, the lower flange of the porcelain porcelain tube is connected to the mount through the spring mechanism, and the horizontal direction of the spring mechanism is made rigid and its rotation direction is elastic. since configured as bodies, at the time of earthquake vibration at the top and bottom and the opposite direction of the bushing connecting device, by cancel the work done by the seismic force acting on the bushing connecting device, reduce the stress acting on the ceramic porcelain tube during an earthquake can do. In addition, according to claim 2 of the present invention.
According to the invention described in claim 1, in the invention described in claim 1,
Since a damping mechanism has been added to the net mechanism, a bushing connecting device
The damping performance of can be improved to reduce the vibration during an earthquake.

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

Further, according to the invention of claim 3 of the present invention, in the invention of claim 1 or 2 , since the counterweight is attached to the lower surface of the grounding container, the counterweight is further applied by seismic force. You can further cancel the job.

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

Further, according to the invention of claim 4 of the present invention, in the invention of claim 3 , since the counterweight is attached to the lower surface of the grounding container via the elastic element, the counterweight is provided by this elastic element. As the runout of the counterweight increases, the runout of the counterweight can be further increased by the deformation of the elastic element to further cancel the work of the seismic force.

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

Further, according to the invention of claim 5 of the present invention, in the invention of claim 3 or 4 ,
Since the damping mechanism is attached to the counterweight, the damping effect can be imparted by the damping mechanism, and thus the vibration of the bushing connecting device during an earthquake can be further suppressed.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Correction target item name] 0020

[Correction method] Change

[Correction content]

According to the invention of claim 6 of the present invention, in the invention of any one of claims 3 to 5 , the counterweight or the damping mechanism is located below the upper surface of the foundation. The height of the bushing connecting device above the upper surface of the foundation can be reduced.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction content]

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the spring constant of the spring mechanism is such that the lateral direction of the gantry in the translation direction. Is more than twice the spring constant in the direction, and is twice the moment spring constant obtained by multiplying the static spring constant of the upper part of the porcelain porcelain tube by the square of the height when the lower part of the porcelain porcelain tube is rigidly supported in the rotating direction. Since it is also set to be small, the stress at the base of the porcelain porcelain tube can be remarkably reduced.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

According to the invention of claim 8 of the present invention, in the invention of claim 4 , the natural frequency composed of the spring constant in the bending direction of the elastic element and the mass of the counterweight is: Since the lower frequency of the porcelain porcelain tube is set to twice or more the natural frequency when it is rigidly supported, the damping action of the damping mechanism can be effectively exhibited.

[Procedure Amendment 16]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Based on the embodiments shown in FIGS. 1 to 6, the same or corresponding parts as in the prior art will be designated by the same reference numerals, and the description will focus on the characteristics of the present invention. 1A and 1B are views showing an embodiment of a vibration damping device for a bushing connecting device according to the present invention. FIG. 1A is a sectional view showing the bushing connecting device, and FIG. 1B is a sectional view showing the bushing connecting device shown in FIG. The top view which shows the spring mechanism which comprises the principal part of a damping device, FIG. 2 is explanatory drawing for demonstrating the effect | action with respect to the bushing apparatus of an earthquake force, The figure (a) is the bushing shown in FIG. 1 shown in FIG. FIG. 1 is a diagram showing a case of a device, FIG. 3B is a diagram showing a case of a conventional bushing device, and FIG. 3 is equivalent to FIG. 1B showing another embodiment of a vibration damping device of a bushing connecting device of the present invention. FIG. 4 is a view showing still another embodiment of the vibration damping device of the bushing connecting device of the present invention.
FIG. 5 is a sectional view showing a main part of still another embodiment of a vibration damping device for a bushing connecting device of the present invention, and FIG. 6 is a sectional view of a vibration damping device for a bushing connecting device of the present invention. It is a figure corresponding to FIG. 5 which shows the principal part of another Example.

[Procedure Amendment 17]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Next, the stress reducing action at the root of the porcelain porcelain tube 1 which may be damaged during an earthquake will be described.
Since the stress generated by the bending deformation of the beam-shaped porcelain porcelain tube 1 is generated in proportion to the curvature that is the second derivative of the displacement, (a) in FIG.
In the mode when the vibration damping device is attached to this embodiment shown in
In addition , no stress is generated in the component of the rigid displacement indicated by the broken line caused by supporting the bushing connecting device by the elastic spring mechanism 11 in the rotation direction, and the displacement of the upper portion of the porcelain porcelain tube 1 is 1
/ 2 is the rigid displacement. Therefore, even if the vibration of the upper part of the porcelain porcelain tube 1 at that time is the same as the vibration of the upper part of the porcelain porcelain tube 1 of the conventional bushing connecting device, the stress at the base of the porcelain porcelain tube 1 is reduced.

[Procedure 18]

[Document name to be amended] Statement

[Name of item to be corrected] 0030

[Correction method] Change

[Correction content]

As described above, according to this embodiment, the lower flange 3 of the porcelain porcelain tube 1 is attached to the mount 5 by the spring mechanism 1.
Since the spring mechanism 11 is connected through 1 and the translation direction of the spring mechanism 11 is rigid and the rotation direction thereof is an elastic body,
Stress generated at the root of ceramic porcelain tube 1 can be remarkably suppressed by intends case counteract the work done by the seismic force acting on the bushing connecting device, also, the structure is attached a simple spring mechanism 11 and the counterweight 12 Therefore, the vibration damping device can be manufactured inexpensively and can be easily maintained and inspected.

[Procedure Amendment 19]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction content]

[0036]

As described above, according to the present invention, the spring mechanism for connecting the lower flange and the frame is interposed between the lower flange of the porcelain porcelain tube and the frame, and the spring mechanism is arranged on the horizontal plane. a rigid is for, and since has become a porcelain porcelain tube in the direction of 360 ° of the lower flange as a fulcrum to be pivotable, it intends case counteract the work done by the seismic force acting on the bushing connecting device Thus, it is possible to significantly suppress the stress generated at the base of the porcelain porcelain tube, and to provide a vibration damping device for the bushing connecting device which is inexpensive to manufacture and easy to inspect and maintain. Also,
According to the invention of claim 2 of the present invention,
In the above invention, the damping mechanism is added to the spring mechanism.
Therefore, the vibration of the bushing during an earthquake can be reduced.

[Procedure amendment 20]

[Document name to be amended] Statement

[Name of item to be corrected] 0037

[Correction method] Change

[Correction content]

Further, according to the invention of claim 3 of the present invention, in the invention of claim 1 or 2 , since the counterweight is attached to the lower surface of the grounding container, the seismic force is further increased by the counterweight. You can even cancel the work done by.

[Procedure correction 21]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

Further, according to the invention of claim 4 of the present invention, in the invention of claim 3 , since the counterweight is attached to the lower surface of the grounding container through the elastic element, the counterweight is provided by this elastic element. As the runout of the counterweight increases, the runout of the counterweight can be further increased by the deformation of the elastic element to further cancel the work of the seismic force.

[Procedure correction 22]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

According to the invention of claim 5 of the present invention, in the invention of claim 3 or 4 ,
Since the damping mechanism is attached to the counterweight, the damping effect can be imparted by the damping mechanism, and thus the vibration of the bushing connecting device during an earthquake can be further suppressed.

[Procedure amendment 23]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

Further, according to the invention of claim 6 of the present invention, in the invention of any one of claims 3 to 5 , the counterweight or the damping mechanism is located below the upper surface of the foundation. The height of the bushing connecting device above the upper surface of the foundation can be reduced.

[Procedure correction 24]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction content]

According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the spring constant of the spring mechanism is horizontal in the horizontal direction. Direction is more than twice the spring constant, and in the swinging direction of 360 ° with the lower flange as the fulcrum, the static spring constant of the upper part of the porcelain porcelain tube when the lower flange of the porcelain porcelain tube is rigidly supported is multiplied by the square of the height. Since it is set to be smaller than twice the moment spring constant required, the stress at the base of the porcelain porcelain tube can be remarkably reduced.

[Procedure correction 25]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

Further, according to the invention described in claim 8 of the present invention, in the invention described in claim 4 , the natural frequency constituted by the spring constant in the bending direction of the elastic element and the mass of the counterweight is: Since the lower frequency of the porcelain porcelain tube is set to twice or more the natural frequency when it is rigidly supported, the damping action of the damping mechanism can be effectively exhibited.

[Procedure Amendment 26]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

1A and 1B are views showing an embodiment of a vibration damping device for a bushing connecting device of the present invention, wherein FIG. 1A is a sectional view showing the bushing connecting device, and FIG. 1B is a vibration damping device for the bushing connecting device. FIG. 3 is a plan view showing a spring mechanism that constitutes a main part of FIG.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Reference number within the agency FI Technical display location H02B 1/54 // H01B 17/26 Z 7244-5G (72) Inventor Masahiro Iida Tsukaguchi Honcho, Amagasaki 8-1-1, Itami Works, Mitsubishi Electric Corporation

Claims (7)

[Claims] 1. A high-voltage conductor is housed in a grounding container supported by a pedestal installed on a foundation, and an insulating gas sealed in the grounding container electrically connects the grounding container and the high-voltage conductor. A damping device for a bushing connecting device for damping a bushing connecting device for a gas insulated switchgear, which ensures insulation and electrically insulates an exposed part in the air by a porcelain porcelain tube connected to the grounding container, wherein A spring mechanism for connecting the lower flange and the mount is interposed between the lower flange of the porcelain insulator and the mount, and the spring mechanism is rigid with respect to a horizontal plane, and the lower flange serves as a fulcrum. A vibration damping device for a bushing connecting device, characterized in that a porcelain porcelain tube can be swung in a direction of 360 °. 2. The vibration damping device for the bushing connecting device according to claim 1, wherein a counterweight is attached to the lower surface of the grounding container. 3. A counterweight is attached to the lower surface of the grounding container via an elastic element.
The damping device for the bushing connecting device described in 1. 4. The damping device for a bushing connecting device according to claim 2, wherein a damping mechanism is attached to the counterweight. 5. The vibration damping device for a bushing connecting device according to claim 4, wherein the counterweight and the damping mechanism are located below the upper surface of the foundation. 6. The spring constant of the spring mechanism is more than twice the horizontal spring constant of the gantry in the horizontal direction, and the lower flange of the porcelain porcelain tube is rigidly supported in the swinging direction of 360 ° with the lower flange as a fulcrum. In a case where the static spring constant of the upper portion of the porcelain porcelain tube is set to be smaller than twice the moment spring constant obtained by multiplying the square of the height, A damping device for the bushing connecting device described. 7. The natural frequency composed of the spring constant in the bending direction of the elastic element and the mass of the counterweight is equal to 2 of the natural frequency when the lower flange of the porcelain porcelain tube is rigidly supported.
The vibration damping device for a bushing connecting device according to claim 3, wherein the vibration damping device is set to twice or more.