JP2012108355A - Noise control device for electric equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact noise control device for electric equipment capable of reducing the cost by simplifying installation work on site while retaining noise control performance similar to the conventional.SOLUTION: This noise control device includes; a bottom plate 24 to be mounted on a concrete foundation 22 and having a base 23 attached thereto; and a wall plate 25 integrally provided therewith so as to be erected from the circumferential edge of the bottom plate 24. This noise control device is configured to accommodate a housing 27 of electric equipment 26 in the interior of the wall plate 25 and fix it onto the bottom plate 24 via a vibration-proof member 37. An opening of the housing 27 of the electric equipment 26 is closed by a lid plate 28, and the lid plate 28 covers over an opening of the wall plate 25.

Description

  The present invention relates to a soundproofing device for an electric device that reduces noise caused by vibration generated by the electric device in an electric device such as a capacitor, a transformer, and a reactor.

  For example, in a capacitor, which is one of electric devices, internal vibration of an element is generated by applying an alternating voltage, and noise is generated due to the vibration. As shown in FIG. 4, this type of electric device 1 is installed on a local concrete foundation 2 together with a soundproofing device 3 for reducing noise generated by the electric device 1 (see, for example, Patent Document 1). The installation work of the electrical equipment 1 and the soundproofing device 3 is performed according to the following procedure.

  First, the electric equipment base 4 is embedded in the local concrete foundation 2, and the electric equipment 1 is installed on the electric equipment base 4 via the vibration isolation member 5. In this way, the vibration isolation member 5 is interposed between the concrete foundation 2 and the electric device 1 so that vibrations generated by the electric device 1 are not transmitted to the concrete foundation 2. In the case where the electric device 1 is a capacitor, the propagation direction of vibrations emitted from the component 7 accommodated in the housing 6 is horizontal as indicated by the arrows in the figure. The soundproofing device 3 is installed so as to cover the upper surface.

  The soundproofing device 3 includes a wall plate portion 8 that bends and surrounds the four side surfaces of the electric device 1 and a top plate portion 9 that closes an upper opening of the wall plate portion 8. The soundproofing device base 10 is embedded in the concrete foundation 2, the wall plate portion 8 and the top plate portion 9 are assembled, and the wall plate portion 8 is placed on the soundproofing device base 10 and fixed by welding or the like.

  A sound absorbing material 11 is attached to the inner surface of the wall plate portion 8. In addition, by electrically connecting the internal insulator 12 provided on the upper surface of the housing 6 of the electrical device 1 and the external insulator 13 provided on the top plate portion 9 of the soundproofing device 3, input / output of the electrical device 1 is achieved. The structure is such that the terminals are led out to the outside.

JP 2003-308073 A

  By the way, in the conventional electrical equipment soundproofing device 3 described above, the work of embedding the electrical equipment base 4 and the soundproofing device base 10 in the concrete foundation 2 and the wall plate portion 8 of the soundproofing device 3 are welded to the soundproofing device base 10. There was a problem that it took a lot of labor for the work, and it took a lot of cost such as assembly work in the field.

  In addition, since the conventional soundproofing device 3 employs a structure that surrounds the entire housing of the electrical device 1, the internal insulator 12 of the housing 6 of the electrical device 1 and the external insulator 13 of the top plate portion 9 of the soundproofing device 3 Must be electrically connected to each other, and the number of constituent members also increases.

  Therefore, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to reduce the cost by simplifying the installation work at the site while maintaining the soundproof performance equivalent to the conventional one. The object is to provide a compact soundproofing device for electrical equipment.

  As a technical means for achieving the above-described object, the present invention is provided integrally with a base plate portion to which a base placed on a foundation is attached and an upright portion from the peripheral edge portion of the base plate portion. A wall plate portion, and the housing of the electric device is accommodated inside the wall plate portion and fixed on the bottom plate portion via the vibration isolation member, and the opening of the electric device housing is closed with the lid plate portion, The lid plate portion is covered with the opening of the wall plate portion.

  In the present invention, the opening portion of the housing of the electric device is closed with the lid plate portion, and the lid plate portion is covered with the opening portion of the wall plate portion. It functions as a plate and a part of the housing of the electric device. As a result, the soundproofing device can be made compact.

  In addition, since the housing of the electric device is housed inside the wall plate portion and fixed on the bottom plate portion via a vibration isolating member, and the base is attached to the bottom plate portion, the electric device, the soundproofing device, The unit can be unitized, and it is only necessary to install a soundproofing device incorporating electric equipment on the foundation, so that the installation work at the site can be simplified while maintaining the soundproofing performance equivalent to the conventional one.

  The lid plate portion in the present invention has a flange portion that bends its peripheral portion and extends along the outer peripheral surface of the wall plate portion, and is between the inner peripheral surface of the flange portion and the outer peripheral surface of the wall plate portion. A structure in which a vibration isolating member is provided in a portion facing the flange portion on the outer peripheral surface of the wall plate portion is desirable.

  In this way, if the flange portion extending along the outer peripheral surface of the wall plate portion is provided by bending the peripheral portion of the lid plate portion, the outside of the soundproofing device can be provided even when the electric device is installed outdoors. Therefore, it is possible to make a structure in which rainwater hardly enters. Further, if a gap is provided between the inner peripheral surface of the flange portion and the outer peripheral surface of the wall plate portion, positioning errors with respect to the wall plate portion can be absorbed when the cover plate portion is assembled. Furthermore, if a vibration isolating member is disposed at the flange portion facing portion of the outer peripheral surface of the wall plate portion, even if the flange portion is in contact with the wall plate portion, the electrical equipment transmitted from the cover plate portion The vibration can be absorbed by the vibration isolating member so that it is not transmitted to the foundation through the wall plate portion and the bottom plate portion.

  The electric device according to the present invention preferably has a structure in which a partition wall portion is provided on the inner periphery of the housing via a space, and components are accommodated inside the partition wall portion.

  In this way, the component can be accommodated in a double structure of the partition wall portion and the housing, and noise caused by vibrations generated by the component is transmitted to the outside of the electric device through the partition wall portion, the space, and the housing. The soundproof performance will be further improved.

  According to the present invention, the opening portion of the housing of the electric device is closed with the lid plate portion, and the lid plate portion is covered with the opening portion of the wall plate portion. The soundproofing device can be made compact because it has a function shared by both the top plate portion and the housing of the electric device. In addition, since the housing of the electric device is housed inside the wall plate portion and fixed on the bottom plate portion via a vibration isolating member, and the base is attached to the bottom plate portion, the electric device, the soundproofing device, Can be unitized, and it is only necessary to install a soundproofing device incorporating electric equipment on the foundation, so that installation work at the site can be simplified. As a result, it is possible to provide a compact soundproofing device for electrical equipment that can reduce the cost by simplifying the installation work at the site while maintaining the soundproofing performance equivalent to the conventional one.

It is sectional drawing which shows the soundproofing apparatus for electric devices in embodiment of this invention. It is the A section expanded sectional view of FIG. (A) is a front sectional view showing the internal structure of the electrical device of FIG. 1, and (B) is a plan sectional view showing the internal structure of the electrical device of FIG. It is sectional drawing which shows the conventional soundproofing device for electric devices.

  An embodiment of a soundproofing device for an electrical apparatus according to the present invention will be described in detail below. In the following embodiments, a capacitor is illustrated as an electrical device, but the present invention can be applied to other electrical devices such as a transformer and a reactor, that is, an electrical device that needs to reduce noise caused by vibration or the like. This electrical equipment soundproofing device is usually installed outdoors.

  As shown in FIG. 1, the soundproofing device 21 for an electrical device in this embodiment includes a bottom plate portion 24 having a rectangular plane shape to which a base 23 such as H-shaped steel placed on a concrete foundation 22 is attached, and the bottom plate portion. The wall plate portion 25 integrally provided so as to stand up from the peripheral portion of the 24 and the upper opening portion of the housing 27 of the electric device 26 accommodated inside the wall plate portion 25 are closed and the wall plate portion 25. And a cover plate portion 28 that covers the upper opening of the cover plate.

  A sound absorbing material 29 is attached to the inner surface of the wall plate portion 25 that bends around the four sides of the electric device 26. A suspension 30 is provided on the outer surface of the wall plate 25 to suspend the entire soundproofing device during transportation or installation.

  The lid plate portion 28 is closed so that the upper opening portion of the housing 27 of the electric device 26 is sealed without gaps, and the upper opening portion of the wall plate portion 25 is sealed as shown in FIG. A gap 31 is interposed between the upper opening and the upper opening. The lid plate portion 28 has a flange portion 32 that extends along the outer peripheral surface of the wall plate portion 25 by bending its peripheral edge portion. A gap 33 is provided between the inner peripheral surface of the flange portion 32 and the outer peripheral surface of the wall plate portion 25, and a vibration isolating member 34 such as an anti-vibration rubber is provided on the flange portion facing portion of the outer peripheral surface of the wall plate portion 25. It is arranged over the entire circumference.

  The lid plate portion 28 is provided with an insulator 35 for leading the input / output terminal of the electric device 26 to the outside. Further, on the upper surface of the lid plate portion 28, there is provided a suspension 36 for hanging the lid plate portion 28 during transportation or assembly.

  The electric device 26 housed inside the wall plate portion 25 is bolted onto the bottom plate portion 24 via a vibration isolating member 37 such as a vibration isolating rubber disposed between the bottom portion of the housing 27 and the bottom plate portion 24. Tightened and fixed by 38. In this way, by providing the vibration isolating member 37 between the electric device 26 and the bottom plate portion 24, the vibration generated by the electric device 26 is not transmitted to the concrete foundation 22 via the bottom plate portion 24, thereby generating noise. Is suppressed. The bolt 38 is also attached through a vibration isolating member 43 such as a vibration isolating rubber.

  In the case where the electric device 26 is a capacitor, the propagation direction of vibrations emitted from the component 39 accommodated in the housing 27 is horizontal as indicated by the arrows in the figure. The wall plate portion 25 and the cover plate portion 28 that are integrally provided on the bottom plate portion 24 so as to cover the upper surface constitute the soundproof device 21.

  As shown in FIGS. 3A and 3B, the electric device 26 includes a partition wall portion 41 on the inner periphery of the housing 27 via a space 40, and an insulating oil 42 is provided inside the partition wall portion 41. A structure in which the component 39 (capacitor element) is accommodated in a filled state is provided. The electrical device 26 has a structure in which an annular space continuous around the partition wall portion 41 is provided in addition to the structure in which the independent spaces 40 are provided on the four sides of the partition wall portion 41 as shown in FIG. There may be.

  In the electrical equipment soundproofing device 21 configured as described above, the upper opening of the housing 27 of the electrical equipment 26 is closed by the lid plate portion 28, and the lid plate portion 28 is covered with the upper opening portion of the wall plate portion 25. As a result, the lid plate portion 28 exhibits a function shared by the top plate portion 9 of the conventional soundproofing device 3 (see FIG. 4) and a part (upper portion) of the housing 6 of the electric device 1. Thereby, the soundproofing device 21 can be made compact. Further, since the lid plate portion 28 is directly attached to the electric device 26 and the insulator 35 is provided on the lid plate portion 28, the internal insulator 12 and the external insulator 13 in the conventional soundproofing device 3 are electrically connected. The number of parts can be reduced in that the structure (see FIG. 4) for connecting to can be omitted.

  As described above, the lid plate portion 28 is also used as the top plate portion 9 of the conventional soundproofing device 3 (see FIG. 4) and a part of the electric device 1, and the electric device 26 housed inside the wall plate portion 25 is the bottom plate. The base 23 is fixed on the portion 24 and the base 23 is attached to the bottom plate portion 24. From this, it is possible to unitize the electric device 26 and the soundproofing device 21, and it is only necessary to bring the soundproofing device 21 incorporating the electric device 26 into the site and install it on the concrete foundation 22 at the factory. The installation work at the site can be simplified while maintaining the same soundproof performance.

  Further, as shown in FIG. 2, the cover plate portion 28 has a structure in which a gap 31 is interposed between the upper opening portion of the wall plate portion 25 and the upper opening portion thereof, thereby The generation of noise is suppressed by preventing vibration generated from 26 from being transmitted from the cover plate portion 28 to the concrete foundation 22 via the wall plate portion 25 and the bottom plate portion 24. Moreover, since the flange part 32 is provided in the peripheral part of the cover board part 28, even when the electric equipment 26 is installed outdoors, it has a structure in which rainwater does not easily enter from the outside of the soundproofing device 21. .

  Here, since the gap 33 is provided between the inner peripheral surface of the flange portion 32 and the outer peripheral surface of the wall plate portion 25, the horizontal positioning with respect to the wall plate portion 25 is performed when the lid plate portion 28 is assembled. The error can be absorbed. Further, since the vibration isolating member 34 is disposed over the entire circumference at the flange portion facing portion of the outer peripheral surface of the wall plate portion 25, the flange portion 32 is in contact with the wall plate portion 25. In addition, the vibration of the electric device 26 transmitted from the cover plate portion 28 is absorbed by the vibration isolation member 34 and is not transmitted to the concrete foundation 22 through the wall plate portion 25 and the bottom plate portion 24, thereby suppressing the generation of noise. ing.

  Further, as shown in FIGS. 3A and 3B, the electric device 26 includes a partition wall portion 41 that houses the component 39 (capacitor element) in a state where the insulating oil 42 is filled, and the partition wall portion 41. Since a double structure with the housing 27 having the space 40 interposed therebetween is provided, noise caused by vibration generated by the component 39 passes through the partition wall portion 41, the space 40 and the housing 27. It goes out of the electric equipment 26, and it becomes easy to further suppress the noise going out of the electric equipment 26.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

22 Foundation (concrete foundation)
23 Base 24 Bottom plate portion 25 Wall plate portion 26 Electrical equipment 27 Housing 28 Cover plate portion 32 Flange portion 33 Gap 34 Vibration isolating member 37 Vibration isolating member 39 Component 40 Space 41 Partition wall portion

Claims (3)

  A bottom plate portion to which a base placed on a foundation is attached; and a wall plate portion integrally provided so as to stand up from a peripheral portion of the bottom plate portion; The housing was housed inside and fixed on the bottom plate through a vibration isolator, and the opening of the housing of the electric device was closed with the lid plate, and the lid plate was covered with the opening of the wall plate. A soundproofing device for electrical equipment.   The lid plate portion has a flange portion that bends its peripheral edge portion and extends along the outer peripheral surface of the wall plate portion, and between the inner peripheral surface of the flange portion and the outer peripheral surface of the wall plate portion. The soundproofing device for an electrical device according to claim 1, wherein a clearance is provided and a vibration isolating member is disposed at a portion of the outer peripheral surface of the wall plate facing the flange.   The soundproofing device for an electric device according to claim 1 or 2, wherein the electric device includes a partition wall portion through a space on an inner periphery of the housing, and a component is accommodated in the partition wall portion.

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