JP4497795B2 - Seismic pads, insulator mounting structure, and transformer equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an earthquake-resistant pad, an insulator device mounting structure, and a transformer equipment.
[0002]
[Prior art]
Conventionally, in a substation facility such as a substation, various insulator devices have been used as insulating devices. For example, in a transformer, a gas circuit breaker, a lightning arrester, etc., an insulator device is attached to a device body such as a transformer body.
[0003]
By the way, conventionally, the above-described device main body and the insulator device sometimes have close natural frequencies. In such a case, if vibration is applied to the device main body due to, for example, an earthquake, the device main body and the insulator device resonate, which may cause damage to the insulator device, overturning, or leakage of oil filled inside. There is a fear.
[0004]
In order to prevent the occurrence of such a situation, it is conceivable that the natural frequency of the insulator device is greatly different from the natural frequency of the device body. However, since the change in the natural frequency of the insulator device is accompanied by a change in the material and shape, the attachment position is restricted and the cost may be increased.
[0005]
[Problems to be solved by the invention]
In view of the above facts, the present invention obtains an earthquake-resistant pad, an insulator mounting structure, and a substation equipment that can effectively prevent damage or falling during an earthquake without changing the shape or material of the insulator. This is the issue.
[0006]
[Means for Solving the Problems]
In invention of Claim 1, it is an earthquake-resistant pad interposed between the apparatus main body which comprises a substation equipment, and the insulator apparatus attached to this apparatus main body, Comprising: It is comprised with the solid cyclic | annular rubber | gum, An elastic member that looks like a vibration cycle and has a long period, an upper connection flange that is attached to the elastic member and is used for attachment to a lever device, a lower connection flange that is attached to the elastic member, and the lower connection flange And a mounting flange that is mounted in contact with the lower connecting flange on the lower side and is used for mounting on the device main body.
[0007]
Therefore, an insulator apparatus is attached to the apparatus main body which comprises a substation installation through this seismic pad. The earthquake-resistant pad is configured to include an elastic member, and the vibration period of the insulator device is increased in an apparent long period. In other words, the natural frequency when the insulator device and the elastic member are considered as a whole is different from the natural frequency of the device body. Therefore, even if the device main body vibrates due to an earthquake or the like, the insulator device will not resonate, and the insulator device may be damaged or dropped (or liquid if the inside of the insulator device is filled with oil or other liquid). Leakage) is prevented.
[0008]
Moreover, since the earthquake-resistant pad is merely interposed between the device main body and the insulator device, it is not necessary to change the material and shape of the insulator device. The elastic member of the earthquake-resistant pad is made of solid annular rubber . For this reason, there are no restrictions on the attachment position of the insulator device and no increase in cost is caused. In addition, since it has an upper connecting flange, a lower connecting flange, and a mounting flange, it can be easily attached to a lever device or a device main body.
According to a second aspect of the present invention, in the first aspect of the invention, the mounting flange extends laterally from the elastic member, the upper connection flange, and the lower connection flange. Easy to attach to.
[0009]
As described above, the elastic member according to claim 1 or 2 is particularly suitable as long as the natural frequency of the elastic member and the insulator device as a whole is different from the natural frequency of the device body. Although not limited, for example, if the elastic member is made of rubber having a shear elastic modulus of 0.4 to 1.0 (MPa) as described in claim 3 , resonance of the insulator device is more reliably performed. Can be prevented.
[0011]
In invention of Claim 4, it is a lever apparatus attachment structure for attaching a lever apparatus to the apparatus main body which comprises a substation installation, Comprising: The said Claim 1-Claim interposed between the said apparatus main body and the said lever apparatus. It has the earthquake-proof pad in any one of claim | item 3. It is characterized by the above-mentioned.
[0012]
That is, in this insulator device mounting structure, the earthquake-resistant pad according to any one of claims 1 to 3 is interposed between the device main body and the insulator device constituting the substation, and the vibration period of the insulator device is It has a long period of appearance. Since the natural frequency when the insulator device and the earthquake-resistant pad are considered as a whole is different from the natural frequency of the device body, the insulator device will not resonate even if the device body vibrates due to an earthquake, etc. Damage and dropout of the insulator device (and liquid leakage when the inside of the insulator device is filled with a liquid such as oil) are prevented.
[0013]
Moreover, since the earthquake-resistant pad is merely interposed between the device main body and the insulator device, it is not necessary to change the material and shape of the insulator device. For this reason, there are no restrictions on the attachment position of the insulator device and no increase in cost is caused.
[0014]
In invention of Claim 5, the apparatus main body which comprises a substation installation, the insulator apparatus attached to the said apparatus main body, The said apparatus main body, and the said insulator apparatus are interposed between the Claims 1-3. A seismic pad according to any one of the above.
[0015]
That is, since the lever device is attached to the device main body, the electric conductor (such as a transmission / distribution line) can be insulated and supported by the lever device.
[0016]
The earthquake-resistant pad according to any one of claims 1 to 3 is interposed between the device main body and the insulator device, and the vibration period of the insulator device is apparently lengthened. Since the natural frequency when the insulator device and the earthquake-resistant pad are considered as a whole is different from the natural frequency of the device body, the insulator device will not resonate even if the body vibrates due to an earthquake, etc. Damage and dropout of the insulator device (and liquid leakage when the inside of the insulator device is filled with a liquid such as oil) are prevented.
[0017]
Moreover, since the earthquake-resistant pad is merely interposed between the device main body and the insulator device, it is not necessary to change the material and shape of the insulator device. For this reason, there are no restrictions on the attachment position of the insulator device and no increase in cost is caused.
[0018]
In addition, in the description of the first to fifth aspects, the “device main body” is not particularly limited as long as it is a device constituting a substation facility, and examples thereof include a transformer, a gas circuit breaker, a lightning arrester, and the like. . There is no particular limitation on the “transformation equipment” composed of this “equipment main body”, and of course, so-called substations are included, and further, power is supplied to substation equipment and railways in factories and various plants. Substation facilities for power generation, substation facilities in power plants, etc. are widely included. Further, the “insulator device” is not limited as long as it is attached to the “device body” and supports the electrical conductors by insulation.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a transformer body 16 to which an insulator 14 is attached by interposing an earthquake-resistant pad 12 according to an embodiment of the present invention. 2 shows the insulator 14 attached to the transformer body 16 by the insulator attachment structure (insulator device attachment structure) of the present embodiment, and FIGS. 3A and 3B show the earthquake-resistant pad 12 enlarged. It is shown as
[0020]
As shown in FIG. 2, the insulator 14 includes a columnar insulator body 18, and an electric conductor such as a power transmission line 40 is supported on the top portion 18 </ b> T of the insulator body 18 in an insulated state.
[0021]
A flange 18 </ b> F is attached to a substantially middle portion of the insulator body 18. The seismic pad 12 is interposed between the flange 18F and the mounting portion 16C of the transformer body 16, and the insulator 14 is attached to the transformer body 16.
[0022]
As shown in FIG. 3, the seismic pad 12 includes an annular rubber ring 20, steel upper connection flanges 22 and lower connection flanges 24 respectively attached to both axial end surfaces of the rubber ring 20. Furthermore, a steel mounting flange 28 is attached to the lower connecting flange 24 by means of mounting bolts 26. The upper connection flange 22 has a female screw 30 formed at a predetermined position, and is attached to the flange 18F of the insulator 14 by a mounting bolt 32 as shown in FIG. A bolt hole 34 is formed in the mounting flange 28. The mounting holes 36 formed in the mounting portion 16C of the transformer main body 16 and the bolt holes 34 of the mounting flange 28 are aligned with each other, and the mounting bolts 38 are inserted and tightened with the nuts. It is attached to the attachment portion 16C.
[0023]
The rubber ring 20 is configured such that the natural frequency of the seismic pad 12 and the insulator 14 as a whole is different from the natural frequency of the transformer main body 16 so that the insulator 14 has an apparent long period. Its physical properties are determined. Therefore, even when the transformer main body 16 vibrates due to, for example, an earthquake, resonance of the insulator 14 is prevented, and response acceleration and earthquake external force are reduced.
[0024]
In this embodiment, the transformer main body 16, the insulator 14, and the seismic pad 12 interposed between the transformer main body 16 and the insulator 14 constitute the transformer facility equipment of the present invention.
[0025]
Next, the operation of this embodiment will be described.
[0026]
The insulator 14 attached to the transformer main body 16 with the earthquake-resistant pad 12 interposed can support an electrical conductor such as the power transmission line 40 in an insulated state at the top portion 18T.
[0027]
The physical properties of the rubber ring 20 constituting the seismic pad 12 are determined so that the natural frequency of the seismic pad 12 and the insulator 14 as a whole is different from the natural frequency of the transformer body 16. The insulator 14 has an apparent long period. Therefore, even when the transformer main body 16 vibrates due to, for example, an earthquake, resonance of the insulator 14 is prevented, and response acceleration and earthquake external force are reduced.
[0028]
In this way, since the resonance of the insulator 14 is prevented, breakage, drop-off from the transformer body 16, falling, etc. are prevented. Some insulators 14 are filled with oil. In such an insulator, oil leakage can be prevented.
[0029]
Moreover, even when the natural frequency of the insulator 14 itself is close to the natural frequency of the transformer body 16, when the insulator 14 and the earthquake-resistant pad 12 (rubber ring 20) are considered as a whole, this natural frequency The frequency can be greatly different from the natural frequency of the transformer body 16. Therefore, in order to prevent the resonance of the insulator 14, it is not necessary to set the natural frequency of the insulator 14 itself to a specific value, and the material and shape of the insulator 14 are not limited. For this reason, the insulator 14 can be configured at low cost, and there is no restriction on the mounting position of the insulator 14.
[0030]
Thus, as the rubber ring 20 constituting the seismic pad 12 of the present invention, the natural frequency of the insulator 14 and the seismic pad 12 (rubber ring 20) as a whole is different from the natural frequency of the transformer body 16. Although it will not be limited if it makes it, if it uses the thing of the shear elastic modulus 0.4-1.0 (MPa) comprised, for example with a natural rubber material or a high damping rubber material, insulator 14 will be ensured more reliably. Can be prevented, which is preferable.
[0031]
Further, in order to more effectively attenuate (dissipate) vibration energy by the rubber ring 20, it is preferable that the loss coefficient is in the range of 0.04 to 0.40. This loss factor is represented by tan (δ) where δ is the phase difference between the stress and strain acting on the rubber ring 20, and the larger this value, the greater the internal friction of the rubber. For this reason, most of vibration energy is converted into thermal energy by shear deformation, and vibration energy such as a large roll can be reliably absorbed to attenuate the vibration.
[0032]
Furthermore, in order to prevent the rubber ring 20 from being broken by an external force acting on the rubber ring 20, it is preferable that the breaking elongation is 500% or more and the breaking strength is 8.0 MPa or more.
[0033]
In the above description, as the seismic pad of the present invention, the rubber ring 20 with the upper connecting flange 22, the lower connecting flange 24, and the mounting flange 28 attached thereto is taken as an example . If it is set as the structure provided with these flanges, the attachment to the transformer main body 16 or the insulator 14 will become easy.
[0034]
In the present invention, the device main body constituting the substation equipment is not limited to the above. Examples of the device main body include a transformer, a gas circuit breaker, and a lightning arrester. The substation equipment constituted by the device main body includes, in addition to substations, substation equipment in factories and various plants, substation equipment for supplying power to railways, substation equipment in power plants, and the like. Also, the insulator device according to the present invention is not limited as long as it is attached to the device body and insulates and supports the electric conductor. Therefore, the apparatus for substation equipment of this invention can be comprised by these appropriate combinations.
[0035]
【Example】
Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
[0036]
FIG. 4 shows an outline of a shaking table experiment comparing the case where the earthquake resistant pad 12 of the above embodiment is used with the case where it is not used. As an example, an insulator 14 having a natural frequency of about 13 Hz was attached to a steel frame pedestal 42 adjusted to a natural frequency of 12.5 Hz with the earthquake-resistant pad 12 of the above embodiment interposed therebetween. The rubber ring 20 of the seismic pad 12 is made of a natural rubber material and has a shear modulus of 0.4 MPa, a loss factor (tan (δ)) of 0.06, a breaking elongation of 600%, and a breaking strength of 17 MPa. did. By interposing this seismic pad 12, the apparent natural frequency of the insulator 14 became 3.0 Hz.
[0037]
Further, as a comparative example, the insulator 14 was directly attached to the frame base 42 without interposing the seismic pad 12.
[0038]
In any case, based on the design response spectrum of IEEE693-1997, an artificial wave generated with a random phase is input to the frame base 42 with target maximum acceleration amplitudes of 0.250 g and 0.375 g, and the insulator 14 The response acceleration was measured at the attachment portion (flange 18F) and the top (top portion 18T). The results are shown in FIG.
[0039]
As can be seen from FIG. 5, in the embodiment of the present invention, the response acceleration is smaller than that of the comparative example regardless of whether the measurement position is the attachment portion (flange 18F) of the insulator 14 or the top (top portion 18T). Yes.
[0040]
【The invention's effect】
Since this invention was set as said structure, it can prevent effectively the failure | damage at the time of an earthquake, a fall, etc., without changing the shape and material of a lever apparatus.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a transformer main body to which an insulator is attached by interposing an earthquake-resistant pad according to an embodiment of the present invention.
FIG. 2 is a partially broken front view showing, in an enlarged manner, an insulator attached to a transformer body by an insulator attachment structure (insulator device attachment structure) according to an embodiment of the present invention.
3A and 3B show a seismic pad according to an embodiment of the present invention, in which FIG. 3A is a plan view and FIG. 3B is a partially broken front view.
FIG. 4 is a front view showing a schematic configuration of a shaking table experiment in an example of the present invention.
FIG. 5 is a graph showing the results of a shaking table experiment of an example of the present invention.
[Explanation of symbols]
12 Seismic pad 14 Insulator 16 Transformer body (equipment body)
20 Rubber ring (rubber)
22 Upper connecting flange (Mounting member)
24 Lower connection flange (mounting member)
28 Mounting flange (Mounting member)

Claims (5)

A seismic pad interposed between the equipment body constituting the substation equipment and the insulator equipment attached to the equipment body,
An elastic member that is made of solid annular rubber and has a long period of time due to the vibration period of the insulator device;
An upper connecting flange that is attached to the elastic member and is used for attachment to an insulator device;
A lower connecting flange attached to the elastic member;
A mounting flange that is mounted on the lower side of the lower connecting flange in contact with the lower connecting flange and is used for mounting to the device body;
A seismic pad characterized by comprising. The earthquake-resistant pad according to claim 2, wherein the mounting flange extends laterally from the elastic member, the upper connection flange, and the lower connection flange . Seismic pad according to claim 1 or claim 2 shear modulus of the rubber constituting the elastic member, characterized in that a 0.4 to 1.0 (MPa). An insulator device mounting structure for attaching an insulator device to the device body constituting the substation equipment,
The earthquake-resistant pad in any one of Claims 1-3 interposed between the said apparatus main body and the said insulator apparatus,
An insulator mounting structure characterized by comprising: The main body of the substation equipment,
An insulator device attached to the device body;
The earthquake-resistant pad according to any one of claims 1 to 3, which is interposed between the device main body and the insulator device,
A device for a substation facility, characterized by comprising:

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