JP2007049011A - Low-noise static induction electric appliance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-noise static induction electric appliance having vertical reinforcing members provided on the outside of the side plates of its tank whereby the noises accompanied by the vibrations generated during its operation can be reduced simply and at a low cost. <P>SOLUTION: The low-noise static induction electric appliance has a tank 1 for storing therein the main body of the electric appliance comprising cores and windings, etc. and has vertical reinforcing members 30 provided on the outside of side plates 2 of the tank. Into the space formed in the inside of each vertical reinforcing member, for example, a raw concrete containing water, sands, and cements is so filled as a heavy-weight material 33 as to use it as a solid concrete. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a low-noise stationary induction electrical device including a vertical reinforcing member provided outside a side plate of a tank that houses a main body of an electrical device such as a transformer or a reactor.

  Noise from static induction electrical equipment such as transformers and reactors is that vibration due to magnetostriction of the iron core is transmitted to the tank side plate through the insulating cooling medium and the tank bottom plate, and the vibration of the side plate is radiated to the space as noise. . Various proposals have been made to reduce noise caused by vibrations from such static induction electrical devices.

  FIG. 3 is a schematic front view showing an example of a conventional low-noise static induction electric device, and FIG. 4 is a cross-sectional view of a main part of a fixed portion of a damping steel plate used in the conventional low-noise static induction electric device. As shown in the figure, the low-noise static induction electric device has a tank 1 in which an electric device main body (not shown) including an iron core, a winding and the like is accommodated together with an insulating cooling medium such as insulating oil. A plurality of vertical reinforcing members 3A provided on the outer side of 2 at a predetermined interval are attached by welding, and the damping steel plate 5 is adjacent to the outside of the portion of the side plate 2 divided by the vertical reinforcing member 3A. The reinforcing members 3A and 3A are each configured to be attached by a presser fitting 7.

  The presser fitting 7 has an L-shaped cross section, one having a presser portion 7A and another supporting portion 7B with different L-shaped bending angles, and a hole 7a is formed in the presser portion 7A.

  The stat bolt 4 for fixing the presser fitting 7 is fixed to the longitudinal reinforcing member 3A provided on the side plate 2 of the tank 1 by welding or the like. This stat bolt 4 is provided outside the end face of the damping steel plate 5.

  Gaskets 6 and 6 'are disposed on both ends of the damping steel plate 5 so as to sandwich the damping steel plate 5, the inner gasket 6 is applied to the longitudinal reinforcing member 3A, and the outer side of the outer gasket 6'. The presser fitting 7 is arranged, the hole 7a of the presser fitting 7 is inserted into the stat bolt 4 and tightened with the nut 9 via the washer 8, so that the end of the damping steel plate 5 is attached to the side plate 2 of the tank 1. Fixed to the longitudinal reinforcing member 3A.

A low-noise stationary induction electrical device configured in this way is disclosed in Patent Document 1, for example.
Japanese Patent Laid-Open No. 11-3826 (FIGS. 1 and 4)

  Conventional low-noise static induction electric devices have a large number of parts and are attached by welding, so that there is a problem that the assembly and installation work becomes complicated. Moreover, since the damping steel plate is used, there exists a problem that a cost increases.

  An object of the present invention is to provide a low-noise stationary induction electrical device provided on the outside of a side plate of a tank, which can reduce noise accompanying vibration generated during operation at low cost and easily.

  A first invention is directed to a low-noise static induction electric device including a tank that houses an electric device main body made of an iron core, a winding, and the like, and a vertical reinforcing member that is provided outside the side plate of the tank. A heavy material is filled in a space formed inside the member.

  In the second invention, the weight material is made of concrete obtained by solidifying raw concrete containing water, sand and cement in a longitudinal reinforcing member.

  In the third invention, the weight material is made of sand.

  As described above, according to the first aspect of the present invention, the vibration of the side plate between the longitudinal reinforcing members is suppressed by the increased weight of the longitudinal reinforcing member. It can be reduced well with a simple configuration.

  According to the second invention, it is possible to reduce the cost of the heavy material filled in the space formed by the vertical reinforcing member and simplify the operation.

  According to the third invention, it is possible to further reduce the cost of the heavy material filled in the space formed by the vertical reinforcing member and further simplify the operation.

  FIG. 1 is a front view of a schematic configuration showing an embodiment of a low-noise stationary induction electrical device according to the present invention, and FIG. As shown in the figure, the low-noise stationary induction electric device has an electric device main body made of an iron core, a winding, and the like (not shown) inside the tank 1 and an insulating cooling medium such as insulating oil. A long vertical reinforcing member 30 provided on the outer side of the side plate 2 is attached to the tank 1 in the vertical direction.

  The vertical reinforcing member 30 is formed in, for example, a rectangular frame (cylinder) shape, and appropriate closing members 31 and 32 are attached to the upper opening and the lower opening, respectively, and can be sealed on the upper opening side. A heavy material filling port 30a is provided. Although the closing member 31 is used to close the upper opening, the closing member 31 is not necessary if the lid member of the tank 1 is used.

  Before attaching the vertical reinforcing member 30 to the tank 1, the heavy material filling port 30 a is formed by cutting the upper opening end of the vertical reinforcing member 30 into a U shape, and in this state, the vertical reinforcing member 30 is connected to the tank 1. Is attached.

  In such a configuration, the weight material 33 is poured from the weight material filling port 30a with a hose or the like, and after the space formed in the longitudinal reinforcing member 30 is sufficiently filled, the weight material 33 is cut out into a U shape. The member is returned to the original position and attached by welding, and the heavy material filling port 30a is sealed.

  The weight member 33 is concrete, and solid concrete containing water, sand (gravel), and cement is solidified in the longitudinal reinforcing member 30.

  If comprised in this way, since each side plate 2 between the longitudinal reinforcement members 30 and 30 will suppress the vibration by the longitudinal reinforcement member 30 which increased in weight, the cost from the noise from a low noise static induction appliance apparatus is low. In addition, it can be reduced well by a simple configuration, and the work of filling the heavy material can be simplified.

  In the present invention, the vertical reinforcing member 30 may be filled only with sand (gravel) as the weight material 33. In this way, the work of filling the heavy material can be further simplified.

  The present invention can also be applied to a low-noise stationary induction electrical apparatus in which a vertical reinforcing member 30 is provided with a horizontal reinforcing member, so that vibration of the side plate 2 is further suppressed, so that noise is further reduced.

  In the said embodiment, if the width dimension of the vertical reinforcement member 30 is enlarged, since the vibration of the side plate 2 between the vertical reinforcement members 30 and 30 will be further suppressed, noise will be further reduced.

  In the above embodiment, a vertical reinforcing member having a U-shaped cross section may be used so that a space for filling the weight material 31 is formed between the vertical reinforcing member and the side plate 2 of the tank 1.

It is a schematic structure front view showing one embodiment of the low noise stationary induction electrical equipment of the present invention. It is the sectional view on the AA line of FIG. It is a schematic structure front view which shows an example of the conventional low noise static induction electric equipment. It is principal part sectional drawing of the fixing | fixed part of the damping steel plate used for the conventional low noise static induction electric equipment.

Explanation of symbols

1 Tank 2 Side Plate 30 Vertical Reinforcement Member 33 Heavy Material

Claims (3)

In a low-noise static induction electric device comprising a tank that houses an electric device main body composed of an iron core, a winding, and the like, and a vertical reinforcing member that is provided outside the side plate of the tank,
A low-noise stationary induction electrical device in which a weight material is filled in a space formed inside the vertical reinforcing member.   The low-noise static induction electric apparatus according to claim 1, wherein the weight material is made of concrete obtained by solidifying raw concrete containing water, sand, and cement in the longitudinal reinforcing member. The low-noise stationary induction electrical apparatus according to claim 1, wherein the weight material is made of sand.

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