JP6625460B2 - Transformer overturn prevention device - Google Patents

Description

  The present invention relates to a technique for preventing a transformer from overturning when an earthquake occurs, and more particularly, to provide a means that can reliably prevent a large transformer from overturning with a relatively small device. And

  Transformers are also referred to as transformers and transformers, and are power devices that reduce high-voltage (for example, 6600 V) electricity supplied from a power company to low-voltage (100 to 200 V), and are installed in many buildings and factories. Have been.

  2. Description of the Related Art Conventionally, a vibration-proof material such as a vibration-proof rubber is disposed between a frame on which a transformer is installed and a floor surface to elastically support the transformer. That is, a vibration isolator made of rubber or the like is disposed on the lower surface of the gantry on which the transformer is installed, and the gantry is installed on the floor via the vibration proof material. With this configuration, the vibration noise generated from the transformer is absorbed by the vibration damping material, and the propagation to the floor is blocked. In addition, the vibration damping material has a function of absorbing vibration of the floor surface when an earthquake occurs, and preventing the transformer from vibrating excessively.

JP-A-8-8122

  Transformers generally have a very large tower-to-ratio (transformer height / width) of about 5, so when receiving vibration energy during an earthquake, the upper part of the transformer swings in the direction of rotation, May fall over. The transformer is equipped with an earthquake-resistant stopper, but when the gantry shakes significantly during a large earthquake, especially when the vibration frequency of the transformer matches the resonance frequency range of the earthquake, the shaking is greatly amplified, There is a risk that the transformer will fall.

  The present invention has been devised to solve the above-described conventional problems, and provides a fall prevention device capable of reliably preventing a transformer from overturning due to an earthquake by supporting means for supporting the transformer with wires. It is an object.

  The present invention according to claim 1 is a pulley having a support standing upright in the vicinity of a transformer, a rotatable rotating portion provided on the support, and braking means for applying a braking force to rotation of the rotary portion. A member, an elastic body having one end fixed in the vicinity of the base of the column, one end attached to the transformer, the other end attached to the elastic body, and an intermediate part disposed along each rotating part of the pulley member. An apparatus for preventing overturning of a transformer, comprising a supporting means having a wire provided.

  The present invention according to claim 2 is the transformer overturn prevention device according to claim 1, wherein a plurality of the pulley members are provided on the column.

The present invention according to claim 3 is the transformer overturn prevention device according to claim 1 or 2, wherein the support means is disposed at four locations around the transformer.

  The present invention according to claim 4 is the transformer overturn prevention device according to any one of claims 1 to 3, wherein the transformer is installed on seismic isolation means or anti-vibration means.

The present invention according to claim 5 is the transformer overturn prevention device according to any one of claims 1 to 4, wherein the elastic body is a coil spring.

The overturn prevention device according to the present invention according to claim 1 is a support that stands upright in the vicinity of a transformer, a rotatable rotating unit provided on the support, and a braking unit that applies a braking force to rotation of the rotary unit. And a resilient body having one end fixed in the vicinity of the base of the column, one end attached to the transformer, the other end attached to the elastic body, and intermediate portions each of the rotating parts of the pulley member. , The transformer is always urged in the pulling direction by the wire attached to the elastic body at the other end. When the transformer vibrates due to an earthquake, the displacement of the transformer is suppressed by the elastic force of the elastic body attached to the other end of the wire and the braking means of the pulley member, so that the transformer is securely prevented from tipping over it can. In addition, since no damping element is required other than the elastic body and the pulley member, the structure can be simplified, and a low-price and reliable fall prevention effect can be obtained.
Further, since the wire between the transformer and the pulley member can be stretched in the horizontal direction, it is possible to suppress horizontal vibration of the transformer.

According to the second aspect of the present invention, since a plurality of the pulley members are provided on the column, the load acting on the wire due to displacement of the transformer when an earthquake occurs is distributed by the plurality of pulley members. Supported. Therefore, the load acting on one pulley member can be reduced, and the pulley member can be reduced in size. As a result, the size of the supporting means provided around the transformer can be reduced, so that the present invention can be implemented in a cubicle in which the transformer is housed.

According to the third aspect of the present invention, since the support means is disposed at four locations around the transformer, the displacement of the transformer can be reliably suppressed.

According to the fourth aspect of the present invention, since the transformer is installed on the seismic isolation means or the vibration isolating means, the effect of suppressing the vibration of the transformer at the time of the occurrence of an earthquake is high. It is possible to further reduce the size.

According to the fifth aspect of the present invention, since the elastic body is a coil spring, the natural frequency can be reduced by setting a small spring constant. As a result, the vibration acceleration of the transformer can be made extremely small, so that even a relatively small device can exhibit a reliable fall prevention function.

It is a front view showing one embodiment of a fall prevention device of a transformer concerning the present invention. It is a top view showing one embodiment of a fall prevention device of a transformer concerning the present invention, and an enlarged top view of support means. 1A and 1B show an example of a support means constituting a transformer overturn prevention device according to the present invention, wherein FIG. 1A is a perspective view seen from the front side, and FIG. 1B is a perspective view seen from the back side. is there.

  The details of the transformer overturn prevention device according to the present invention will be described with reference to the drawings showing an embodiment. FIG. 1 is a front view showing an embodiment of a fall prevention device S for a transformer T according to the present invention, and FIG. 2 is a plan view showing an embodiment of the fall prevention device S and an enlarged plan view of a support means 10. 3 and 3 show an example of the support means 10 constituting the fall prevention device S, wherein FIG. 3A is a perspective view from the front side, and FIG. 3B is a perspective view from the back side. It is.

  The transformer T is a power device that is installed in a building or a factory and reduces a high voltage such as 6600 V supplied from a power company to a voltage of 100 V or 200 V using electromagnetic induction, and is illustrated inside the device. A coil or the like that is not stored is stored. The transformer T is provided with a vibration isolator 21 made of rubber or the like as a vibration isolator on a floor portion 22, and is installed on a gantry 20 arranged via the vibration isolator 21. The transformer T is elastically supported by the vibration isolator 21 to absorb vertical vibration generated during driving. Further, the vibration isolator 21 also has a function of mitigating vibration when an earthquake occurs. The anti-vibration material 21 can be omitted according to the installation situation.

  The overturn prevention device S of the transformer T of the present embodiment includes four support means 10 arranged at four places around the transformer T. The support means 10 includes a support 11 erected in the vicinity of the transformer T, a plurality of pulley members 12 provided on the support 11, and a coil spring whose one end is fixed near the base of the support 11. A body 14 and a wire 13 having one end attached to the attachment portion 30 of the transformer T, the other end attached to the elastic body 14, and an intermediate portion disposed along the plurality of pulley members 12. . The number of the supporting means 10 can be appropriately changed according to the size of the transformer T to be applied, the use condition, and the like. However, it is desirable to arrange the support means 10 symmetrically in the left-right or front-back direction with respect to the transformer T.

  In this example, the column 11 is formed of a long rectangular pipe, and is erected by fixing the gantry plate 15 attached to the lower end to the floor 22 by bolts or welding.

In this example, a plurality of pulley members 12 are attached to a region closer to the upper end of the column so as to be adjacent to each other. The pulley member 12 includes a rotatable rotating portion 12a at a central portion, a fixed portion 12b sandwiching the rotating portion 12a, and braking means for applying a braking force to the rotation of the rotating portion 12a. As the braking means, for example, a configuration such as a rotary damper is used. That is, a viscous fluid such as silicon oil is filled in a case in which the rotating shaft of the rotating portion 12a is housed, and a structure for increasing a contact area with the viscous fluid is provided in the rotating portion 12a. Since the rotating part 12a receives resistance from the viscous fluid when rotating, a braking force can be applied to the rotation of the rotating part 12a.

The plurality of pulley members 12 are arranged such that the rotation axes of the rotation unit 12a are parallel to each other. Each pulley member 12 is attached by connecting the fixing portion 12b to the column 11 with a bracket 16, an arm 17, or the like. In this example, four pulley members 12 are provided for one support column 11, but this number can be changed as appropriate. That is, the number may be one, two or three, or five or more. When only one pulley member 12 is provided on the column 11, the wire 13 may be wound around the peripheral surface of the rotating portion 12a once.

The height position of the uppermost pulley member 12 is arranged at the same height as the upper surface portion of the transformer T where the mounting portion 30 is provided, or higher than the upper surface portion. It is desirable to set the wire 13 between the wires 12 as horizontal as possible.

An elastic body 14 is provided near the base of the support 11. In this example, a coil spring having one end fixed to the gantry plate 15 is used as the elastic body 14. The coil spring can control the behavior of the transformer T with respect to vibration and displacement by appropriately setting the spring constant. Note that an elastic resin such as rubber can be used instead of the coil spring.

One end of the wire 13 is connected to an appropriate mounting portion 30 provided on the upper surface of the transformer T, the other end is connected to the elastic body 14, and the intermediate portion is connected to each rotation of the plurality of pulley members 12. It is arranged along the surface of the part 12a.

The overturn prevention device S of the present invention configured as described above passes the upper surface of the transformer T and the elastic body 14 fixed near the base of the column 11 by contacting the surface of the rotating portion 12a of the pulley member 12. When the transformer T is vibrated or displaced by the occurrence of an earthquake, the vibration or displacement is caused by the elastic deformation of the elastic body 14 via the wire 13 and the braking force of the pulley member 12. Absorbs and suppresses vibration and displacement of transformer T.

Since the pulley member 12 and the wire 13 provided on the support 11 and the elastic body 14 have a simple configuration, it is possible to provide a low-cost, reliable and effective fall prevention device S.

By providing the plurality of pulley members 12, the load acting on the wire 13 when the transformer T vibrates can be dispersed and supported by each pulley member 12. Therefore, the load per pulley member 12 is reduced, and the pulley member 12 can be downsized. In addition, since the size of the pulley member 12 is reduced, the size of the support means 10 is also reduced. Therefore, the overturn prevention device S of the present invention can be made compact, and can be housed together in a cubicle or the like in which the transformer T is housed. It is possible to do.

Further, in the overturn prevention device S of the present example, the support means 10 is arranged on both left and right sides of the transformer T, and the direction in which the wire 13 extending from the upper surface of the transformer T to the support means 10 is set substantially horizontal. With this configuration, the upper part of the transformer T is supported in a state where it is pulled left and right by the wire 13 in the horizontal direction, so that the horizontal vibration and displacement of the transformer T can be suppressed. In addition, since the direction in which the wire 13 is stretched is changed in the vertical direction by the pulley member 12, the column 11 can be arranged near the transformer T. Therefore, it is easy to make the overturn prevention device S compact.

When the elastic body 14 is a coil spring, the natural frequency is reduced by setting the spring constant to a small value. Therefore, the vibration speed of the elastic body (coil spring) 14 generated through the wire 13 when the transformer T vibrates. Can be reduced. As a result, the effect of delaying the vibration of the transformer T when an earthquake occurs can be obtained.

  ADVANTAGE OF THE INVENTION This invention can prevent reliably the transformer installed in the facilities which use large electric powers, such as a substation and a factory, from falling down by vibration at the time of an earthquake. According to the size of the transformer T, it is easy to optimally change the number of the pulley members 12 constituting the support means 10 and the number of the support means 10 installed. Further, application to a structure similar to a transformer is possible.

S Fall prevention device 10 Support means 11 Support column 12 Pulley member 13 Wire 14 Elastic body 15 Mounting plate 21 Vibration isolator 30 Mounting part

Claims (4)

A column standing near the transformer;
A pulley member provided on the column, having a rotatable rotating part, and a braking means for applying a braking force to the rotation of the rotating part,
An elastic body having one end fixed near the base of the support,
One end is attached to the transformer and the other end attached to the elastic body, seen including a support means and a wire intermediate portion is disposed along each rotation of the pulley member,
A plurality of the pulley members are provided on the column,
The plurality of pulley members are arranged on the column such that the rotation axes of the respective rotation units are parallel to each other,
The overturn prevention device for a transformer, wherein the number of the pulley members connected to the support columns is configured to be changeable by a fixed portion . 2. The overturn prevention device for a transformer according to claim 1, wherein the transformer is installed on a seismic isolation unit or an anti-vibration unit. 3. The fall prevention device for a transformer according to claim 1, wherein the elastic body is a coil spring. Said support means are arranged at four places around said transformer;
When considering the quadrangle constituted by the four places, each of the pillars is arranged in a direction inclined rather than parallel to a direction in which each side of the quadrangle is extended. 3. The transformer overturn prevention device according to claim 1.

Images