JPH11121255A - Stationary induction electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cover the side surface of a tank in a wider range and to improve the vibration suppressing performance of a sound insulating plate 21 by arranging an elastic element between the main body of the sound insulating plate and the supporting point of the side surface of the tank, which closes the gap with a sealing material and attaching a reinforcing rib to the surface of the flat plate of the main body of the sound insulating plate. SOLUTION: A sound insulating plate 21 is attached between an upper supporting point 8 of an upper reinforcing beam 4 and a lower supporting point 9 on a tank side surface 3, so as to cover the outer surface of the tank side surface 3. In the sound insulating plate 21, a first elastic element 15 is arranged between a sound-insulating plate main body 22 and the upper supporting point 8 on an upper beam 4, and a second elastic element 16 is arranged between the sound-insulating plate main body 22 and the lower supporting point 9 of the tank side surface 3. Furthermore, the gap is closed with soft sealing material 17. Furthermore, the sound-insulating plate main body 22 is formed by welding a flat plate 24 to a framework 23 which is formed by welding U-shaped steel into a rectangular shape and further attaching a band-shaped reinforcing rib, which divides the surface of the flat plate 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static induction device, and more particularly to a static induction device having a sound insulation plate attached around a tank of the static induction device.

[0002]

2. Description of the Related Art In recent years, noise regulations have become stricter from the viewpoint of environmental protection, and there has been a strong demand for lowering noise of stationary induction devices such as transformers. The noise of the static induction device is generated because the vibration of the main body of the static induction device propagates to the tank, and the side of the tank vibrates to emit sound to the surroundings. As a means to prevent the diffusion of radiated sound, there is a method of storing a stationary induction device in a soundproof building made of steel plate, etc.However, since it has drawbacks such as an increase in installation area, a sound insulation plate is installed around the tank. The measures to be provided have been widely implemented. This sound insulating plate reduces the sound radiated from the tank side due to the transmission loss, that is, the sound reduction effect when the sound passes through the sound insulating plate. In addition, structural considerations are made so that the sound insulation plate itself vibrates due to the vibration of the tank side surface and does not generate noise.

[0003] The conventional sound insulation technology of such a static induction device will be specifically described with reference to FIGS. 11 (a), 11 (b) and 12. FIG. In FIG. 11A, reference numeral 1 denotes a stationary induction device main body, 2 denotes a tank for storing the static induction device, 3 denotes a tank side surface, 6 denotes a tank cover, 20 denotes a flange, 4 denotes an upper reinforcing beam of the tank 2, 5 denotes a tank. 2 is a lower reinforcing beam. The upper support beam 4 is provided with an upper support point 8, and the side face 3 is provided with a lower support point 9.
A sound insulating plate 7 covering the tank side surface 10 between the lower support point 9 and the lower side support point 9 is mounted around the tank. Further, the sound insulating plate 7 is a sound insulating plate main body 14 in which a band-shaped reinforcing rib 12 surrounding the periphery thereof and a band-shaped reinforcing rib 13 dividing the surface are attached to a flat plate 11 as shown in FIG.
And an elastic element 15 disposed between the sound insulating plate main body 14 and the upper support point 8, an elastic element 16 disposed between the sound insulating plate main body 14 and the lower support point 9, and elastic elements 15 and 16. This is made of a flexible sealing material 17 that closes a gap created between the sound insulating plate main body 14 and the tank side surface 10.

The elastic elements 15 and 16 are made of rubber or metal spring which elastically deforms in the direction of vibration of the supporting points 8 and 9, ie, the horizontal (x) and vertical (z) directions of the tank side surface 3. I have. In addition, the sealing material 17 includes the sound insulating plate main body 14 and the tank side surface 3 and the sound insulating plate main body 14.
A material having a property of sealing the gap between the upper reinforcing beam 4 and the upper beam 4 and deforming flexibly in accordance with the relative displacement between them, such as lead molded into a foil tape, is used. Note that the shape of the sealing material 17 is not limited to a tape as long as the above properties are satisfied, and may be a filler that is directly embedded in the gap.

In the above-mentioned conventional sound insulation technology, the sound insulation plate 7 attenuates the sound radiated from the covered tank side surface 10 by the transmission loss of the sound insulation plate 7, and at the same time, generates noise from the sound insulation plate itself. The elastic elements 15, 16
Thus, the vibration insulation of the sound insulating plate main body 14 is performed. Further, by increasing the bending rigidity of the sound insulating plate main body 14 by the reinforcing ribs 12 and 13, bending vibration of the sound insulating plate main body 14 is prevented, and an ideal vibration system including the elastic elements 15, 16 and the sound insulating plate main body 14 is formed. It is close to the degree of freedom system. With such a configuration, the vibration insulating effect of the elastic elements 15 and 16 is improved, and the vibration of the sound insulating plate main body 14 is suppressed, so that the noise generated from the sound insulating plate main body 14 can be reduced.

Further, the provision of the elastic elements 15 and 16 creates a gap between the sound insulating plate main body 14 and the tank side face 10, but the gap is closed by the flexible sealing material 17 so that the sound radiated from the tank side face 10 is emitted. , To prevent leakage from the gap to the outside. In addition, it is also possible to configure the sound insulation plate main body 14 from a damping steel plate to enhance the vibration suppression effect of the sound insulation plate.
The damping steel sheet is formed integrally with a plurality of steel sheets with a polymer viscoelastic material interposed therebetween, and it is well known that the steel sheet has high damping ability against vibration.

Further, in the prior art shown in FIG. 12, the sound insulating plate is divided into two sound insulating plates 34 and 35 and attached to the tank side surface 3, and the gap between the sound insulating plate 34 and the sound insulating plate 35 is formed by a flexible sealing material 19. It's the one you've blocked. As described above, by dividing the sound insulating plate into a plurality of parts in the horizontal direction, the sound insulating plate can be configured to cover a large area of the tank side surface 3 instead of increasing the size of one sound insulating plate.

[0008]

By the way, in recent years, due to the increase in the size of the static induction device, the vibration generated from the static induction device main body tends to increase. As a result, the sound radiated from the tank side surface increases, the vibration transmitted to the sound insulating plate attached around the tank also increases, and the noise generated by the vibration of the sound insulating plate itself also increases.
Therefore, there is a demand for a static induction device that is further reduced in noise. Specifically, it is considered desirable to further improve the vibration suppression of the sound insulating plate and to cover the tank surface, which is a noise generation source, over a wider area.

However, in the prior art, there is a limit in achieving both suppression of vibration of the sound insulating plate and enlargement of the area. This will be described with reference to FIGS. 11A, 11B, and 12. FIG.

That is, in the prior art shown in FIG.
The sound insulating plate body 14 is provided around and on the surface of the flat plate 11 having low rigidity.
Due to the structural reason that a large number of band-shaped reinforcing ribs 12 and 13 are attached by welding, deformation of the flat plate 11 due to welding is inevitable, and when the sound insulating plate main body 14 is enlarged, welding deformation is increased and the sound insulating plate main body 14 is increased. The dimensional accuracy is reduced. Further, when a damping steel sheet is used as the material of the flat plate 11, the damping steel sheet is integrally formed by sandwiching a polymer viscoelastic material between a plurality of steel sheets. There are generally restrictions. Therefore, there is a limit to the size of the sound insulation plate that can be manufactured from the viewpoint of the material used.
There is a problem in increasing the size of the sound insulating plate.

On the other hand, in the prior art shown in FIG. 12, instead of enlarging the size of one sound insulating plate, a plurality of sound insulating plates are combined in the horizontal direction to increase the area covering the tank surface. When assembling the sound insulating plate 34 in this manner,
When the sound insulating plate 34 is tilted due to imbalance in weight or the like and strongly contacts the adjacent sound insulating plate 35, the two sound insulating plates 34, 35 increase in vibration because they exert a force on each other. The noise generated by the vibration of the plate itself may increase. As described above, even if each of the sound insulating plates has a sufficient performance, the sound insulating performance may be lower than that of the single sound insulating plate depending on the state in which the sound insulating plates are separately mounted on the tank side surface 3. There is. In order to prevent contact, measures to widen the interval between the sound insulating plates 34 and 35 are considered. However, if the interval is widened, the work of attaching the seal material 19 in the gap becomes difficult, and the sound leakage from the gap increases. Therefore, it is not preferable in terms of the overall performance of the sound insulating plate.

Further, in the prior art shown in FIGS. 11 and 12, portions which are not covered by the sound insulating plate 7, such as the vicinity of the flange 20, remain.
When the height is increased, the structure becomes unstable when the sound insulating plate body 14 which greatly exceeds the height of the upper support point 8 is mounted, because the sound insulating plate 7 is mounted on the upper reinforcing beam 4. Therefore, even if an attempt is made to increase the area of the sound insulating plate in the height direction, there is a limit to the height of the sound insulating plate that can be mounted.

As described above, in the prior art, in order to achieve both vibration suppression and area expansion of the sound insulating plate, the size of one sound insulating plate or the use of a plurality of sound insulating plates can be used. There are limitations, and both have the disadvantage of causing problems.

The present invention (corresponding to claims 1 and 2) provides
The purpose of the present invention is to consider the situation of the prior art described above. The purpose is to cover the tank surface, which is a noise generating source, over a wider area, and to further enhance the vibration suppression performance of the sound insulating plate, so that the radiation noise on the side of the tank is improved. Another object of the present invention is to provide a static induction device provided with a sound insulating plate having a noise reduction effect for both the sound radiation caused by the vibration of the sound insulating plate itself.

[0015]

In order to achieve the above object, a first aspect of the present invention is to provide a stationary induction device main body on a side surface of a tank accommodating the same together with an insulating oil or an insulating gas by vertically supporting a stationary point. In a stationary induction device with a sound insulation plate attached so as to cover the outer surface of the tank side between the support points,
The sound insulating plate is a flat sound insulating plate body with a reinforcing member,
A first elastic element disposed between an upper supporting point of the tank side surface, a second elastic element disposed between the sound insulating plate main body and a lower supporting point of the tank side surface, By arranging the two elastic elements, the sound insulating plate body is made of a flexible sealing material that closes a gap generated between the tank side surfaces, and the sound insulating plate body is formed by welding a shaped steel into a polygonal shape. A flat plate is welded to a frame mold, and a belt-like reinforcing rib for dividing the surface of the flat plate is attached.

According to a second aspect of the present invention, there is provided on a side surface of a tank accommodating a stationary induction electric device main body together with an insulating oil or an insulating gas.
Providing support points vertically spaced apart, in a stationary induction device attached with a sound insulating plate so as to cover the tank side outer surface between the supporting points, the sound insulating plate is divided into a plurality of parts in the horizontal direction and attached around the tank, It is characterized in that a gap between adjacent sound insulating plates is closed with a flexible sealing material, and a cushioning material is arranged between the sound insulating plates.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a stationary induction device according to a first embodiment (corresponding to claim 1) of the present invention. FIG. 1 (a) is a schematic side view, FIG. 1 (b) is a front view of a sound insulating plate main body, and FIG. FIG. 3C is a sectional view of another sound insulating plate.

As shown in the figure, a tank 2 for housing a stationary induction electric machine main body 1 together with an insulating oil or an insulating gas is installed, and an upper reinforcing beam 4 and a lower reinforcing beam 5 are attached to the tank side 3 vertically in the horizontal direction. , Upper reinforcing beam 4
A sound insulating plate 21 is attached between the upper support point 8 of the first tank and the lower support point 9 on the tank side 3 so as to cover the outer surface of the tank side 3. The sound insulating plate 21 includes a sound insulating plate main body 22, a first elastic element 15 disposed between the sound insulating plate main body 22 and the upper support point 8 on the upper beam 3, a sound insulating plate main body 22 and a tank side surface 3.
And a second elastic element 16 disposed between the lower support point 9 and a flexible sealing material 17 for closing a gap formed between the sound insulating plate main body 22 and the tank side surface 3.
The sound insulation plate main body 22 is formed by welding a flat plate 24 to a frame 23 formed by welding a U-shaped steel in a rectangular shape, and further attaching a belt-like reinforcing rib 25 for dividing the surface of the flat plate 24.

The shape of the steel used for the frame of the sound insulating plate main body 22 has a width sufficient for welding the flat plate 24 and has a sufficient second moment of area to increase the rigidity of the flat plate 24. The shape may be arbitrary, as long as it is a frame type 26 in which an L-shaped steel is welded in a rectangular shape as shown in FIG. 1 (c).

Next, the operation of this embodiment will be described.
In the prior art, since a large number of reinforcing ribs were welded to a flat plate having low rigidity, a large deformation occurred in the sound insulating plate body. However, in the stationary induction device of the present embodiment, the sound insulating plate main body 22 is configured by welding the flat plate 24 to a frame die 23 that has been welded in a rectangular shape in advance, and the member to be welded to the flat plate 24 is only the reinforcing rib 25. is there. In addition, the frame die 23 made of U-shaped steel is
, The deformation associated with welding can be suppressed to a small degree by the rigidity. Therefore, even a large sound insulating plate can be easily manufactured with high dimensional accuracy.

In this embodiment, the rectangular frame mold 23 is manufactured in advance, but since it is firmly fixed to the flat plate 24 by welding, the effect of increasing the bending rigidity of the sound insulation plate main body 22 is the same as that of the prior art. There is no difference from rib. That is, the bending vibration of the sound insulating plate main body 22 is suppressed, and the elastic elements 15 and 16 are suppressed.
The effect of reducing the noise generated by the vibration of the sound insulating plate main body 22 by improving the vibration insulating effect of the elastic elements 15 and 16 by bringing the vibration system including the sound insulating plate main body 22 closer to the ideal one-degree-of-freedom system. Is the same.

Further, in the present embodiment, the sound insulating plate main body 22 is provided.
Can be made of a damping steel plate to enhance the damping effect of the sound insulating plate 21. The vibration damping steel plate is formed integrally with a plurality of steel plates with a polymer viscoelastic material interposed therebetween, and is known to have high vibration damping ability.

As described above, according to the present embodiment, the sound insulation plate body 22 is formed by welding the U-shaped steel into a rectangular shape in advance.
Since the flat plate 24 is welded to 3, the deformation due to welding can be reduced. Therefore, a large sound insulating plate can be manufactured with high dimensional accuracy as compared with the prior art.

FIGS. 2A and 2B are diagrams showing the construction of a stationary induction device according to a second embodiment of the present invention (corresponding to claim 1). FIG. 2A is a schematic side view, and FIG. Figure, Figure (c)
FIG. 4 is a sectional view of another sound insulating plate.

As shown in the figure, in the present embodiment, in the static induction device of the first embodiment, the sound insulation plate main body 28 is surrounded by an outer frame 29 formed by welding a U-shaped steel in a rectangular shape. The inner frame 30 made of H-shaped steel is welded so as to divide the surface to be divided, and a flat plate 31 is further welded to each of the divided surfaces. Is the same as

In this embodiment, the shape of the shape steel used for the frame of the sound insulating plate main body 28 has a width sufficient for welding the flat plate 31 and a cross section 2 sufficient for increasing the rigidity of the flat plate 31.
The shape is arbitrary as long as it has the next moment. For example, an outer frame 27 in which an L-shaped steel as shown in FIG.

Next, the operation of the present embodiment will be described.
In the present embodiment, the sound insulation plate main body 28 is configured by simply welding a flat plate 31 to each divided surface of an outer frame 29 and an inner frame 30 formed by welding a U-shaped steel, unlike the first embodiment. different. Therefore, in the present embodiment, there is no need to weld a reinforcement that divides the surface to the flat plate 31 having low rigidity, and the deformation of the sound insulating plate main body 28 due to welding can be further reduced. Further, it can be easily manufactured with high dimensional accuracy.

When a damping steel plate is used as the sound insulating plate main body 28, the damping steel plate is integrally formed by sandwiching a polymer viscoelastic material between a plurality of steel plates. Generally, there are restrictions on the size. In the present embodiment, since one sound insulating plate main body 28 is constituted by a plurality of flat plates 31, the size of each of the flat plates 31 to be used is smaller than that in the case where one sound insulating plate main body is constituted by one flat plate. I can do it. Therefore, even when a vibration damping steel plate is used, a large sound insulating plate can be manufactured without being restricted by the manufacturing dimensions.

As described above, according to this embodiment, the sound insulating plate main body 28 is formed by welding the U-shaped steel into a rectangular shape.
Further, the inner frame 30 made of H-shaped steel is welded so as to divide the surface surrounded by the outer frame 29, and the flat plate 31 is further welded to each of the divided surfaces, so that the deformation due to welding is further reduced. Can be suppressed. Therefore, a larger sound insulation plate can be manufactured with higher dimensional accuracy than in the first embodiment.

FIG. 3 is a cross-sectional view of a sound insulating plate main body of a stationary induction device according to a third embodiment (corresponding to claim 1) of the present invention. The sound-insulating plate body of the present embodiment is obtained by inserting the peripheral portion of the sound-absorbing material sheet 33 into the concave portion of the U-shaped section steel constituting the frame 23 of the sound-insulating plate body 32 in the static induction device of the first embodiment. Thus, the sound absorbing material sheet 33 is attached to the inside of the sound insulating plate main body 32.

Next, the operation of the present embodiment will be described.
In this embodiment, since the U-shaped steel is used for the frame mold 23 of the sound insulation plate main body 32, the inner periphery of the frame mold 23 can be recessed all around. When the peripheral portion of the sound absorbing material sheet 33 is pushed into the recess and attached to the sound insulating plate main body 32, the sound absorbing material sheet 3
3 never falls off. Therefore, a structure for fixing the sound absorbing material sheet 33 is not required, and the operation of fixing the sound absorbing material sheet 33 can be greatly simplified. Further, when the sound absorbing material is provided in a closed space as described above, it is possible to prevent an increase in noise.

According to this embodiment, the peripheral portion of the sound absorbing material sheet 33 is inserted and attached to the concave portion of the U-shaped section steel constituting the frame 23 of the sound insulating plate main body 32.
The work of fixing the sound absorbing material sheet 33 can be simplified.

FIG. 4 is a structural view of a sound insulating plate of a stationary induction device according to a fourth embodiment of the present invention (corresponding to claim 2). FIG. 4A is a side view of the sound insulating plate, and FIG. It is sectional drawing of the sound insulation board seen from AA direction.

This embodiment is different from the stationary induction device of the first embodiment in that the sound insulation plates 41, 42 divided into two pieces in the horizontal direction are attached to the tank side surface 3, and the gap between the adjacent sound insulation plates 41, 42 is softly sealed. The sound insulation plate 41 is closed with the material 19.
A cushioning member 43 is arranged between the sound absorbing plate 42 and the sound insulating plate 42. Other configurations are the same as those of the first embodiment.

In this embodiment, the number of divisions of the sound insulating plate is not limited to two, but is arbitrary according to the size of the tank side surface 3. In addition, even if the sound insulating plate is of the prior art, the first and second
Examples may be used. Further, the cushioning member 43 is made of a very flexible elastic material such as a rubber tube. The material and the shape of the cushioning material 43 may be arbitrary as long as the above-mentioned characteristics are satisfied and the cushioning material 43 can be arranged in the gap between the sound insulating plates 41 and 42.

Next, the operation of this embodiment will be described.
In this embodiment, the cushioning material 4 is provided between the sound insulating plate 41 and the sound insulating plate 42.
3, the sound absorbing plate 41 is tilted due to the imbalance in weight, and even if the sound insulating plate 41 comes into contact with the adjacent sound insulating plate 42, the flexible cushioning material 43 is directly deformed. As compared with the case of contact, it is difficult to exert a force on each other. That is, the vibration increases due to mutual interference caused by the transmission of the vibration by the sound insulating plates 41 and 42,
The noise generated from the sound insulation plate itself can be prevented from increasing. Therefore, even when the sound insulating plate 41 is assembled in contact with the adjacent sound insulating plate 42, there is no problem that the sound insulating performance is lower than when one sound insulating plate is used.

As described above, according to this embodiment, since the cushioning member 43 is disposed between the sound insulation plates 41 and 42 which are separately mounted, it becomes difficult for the sound insulation plates to exert a force on each other, and It is possible to prevent the sound insulation performance from deteriorating due to interference between the plates.

FIG. 5 is a structural view of a sound insulating plate of a stationary induction device according to a fifth embodiment of the present invention (corresponding to claim 2). FIG. 5 (a) is a side view of the sound insulating plate, and FIG. Sectional view of the sound insulating plate viewed from the AA direction, FIG.
It is sectional drawing seen from the direction.

This embodiment is different from the stationary induction device of the fourth embodiment in that one of the two adjacent sound insulating plates 44, 45 is provided on one of the sound insulating plates 44 and the portion 4 overlapping with the other sound insulating plate 45.
6 is provided, and a gap generated in the overlapping portion 46 is closed by a flexible sealing material 47. The sealing material 47 is a material having a property of sealing the gap and of being deformed flexibly in accordance with the relative displacement of the two sound insulating plates 44 and 45, and is made of lead or the like molded into a foil tape. The sealing material 47
If the above properties are satisfied, the shape is not limited to the tape and may be any shape, and may be a filler directly embedded in the gap.

Next, the operation of the present embodiment will be described.
In the present embodiment, the sound radiated from the tank side surface 10 is bent at the overlapping portion 46 of the sound insulating plate in an attempt to leak out from the gap between the sound insulating plate 44 and the sound insulating plate 45. In general,
It is known that when a sound path is bent, there is a silencing effect. The sound radiated from the tank side surface 10 is also attenuated shortly before reaching the sealing material 47 due to the sound deadening effect.
Therefore, in addition to the effect of the sealing material 47, sound leakage from the gap between the sound insulating plate 44 and the sound insulating plate 45 can be more effectively prevented.

The number of overlapping portions is arbitrary, and the above effect can be enhanced by providing a plurality of overlapping portions. FIG. 9C is a modification of the present embodiment, in which the sound insulating plate 45 is provided with an overlapping portion 48 so that the sound path is bent twice. Since there is a sound deadening effect each time a bend occurs, the effect of preventing sound leakage from gaps can be further enhanced.

As described above, according to the present embodiment, one of the adjacent sound insulation plates 44, 45 is provided with a portion 46 overlapping with the other sound insulation plate 45.
The sound that is about to leak to the outside from the gap between the sound insulation plate 44 and the sound insulation plate 45 is attenuated by bending, so that the sound leakage from the gap can be more effectively prevented.

FIG. 6 is a schematic side view of a stationary induction device according to a sixth embodiment (corresponding to claim 1) of the present invention. This embodiment is different from the stationary induction device of the first embodiment in that an upper support point 51 is provided on the tank cover 6 of the stationary induction device and a lower support point 52 is provided on the tank side surface 3 so as to be spaced apart from each other. A sound insulating plate 55 is attached so as to cover the side surface 53. Further, the sound insulating plate 55 includes a sound insulating plate main body 54 and a sound insulating plate main body 54.
First elastic element 56 disposed between
A second elastic element 57 disposed between the sound insulating plate main body 54 and the lower support point 52; a first and a second elastic element 56;
57, the sound insulating plate body 54 and the tank 2
It is made of a flexible sealing material 59 that closes the gap created between them. Further, the sound insulating plate main body 54 may be of the prior art or of the first or second embodiment.

Next, the operation of the present embodiment will be described.
In this embodiment, since the position of the upper support point 51 is arranged on the tank cover 6, a high sound insulation plate is formed without instability as compared with the prior art in which the upper support point 51 is arranged on the side of the tank. The sound insulation plate 55 can cover the vicinity of the flange 20 that cannot be covered by the conventional technology. As described above, by covering the tank 2 as the noise source over a wide area in the height direction, the sound insulating effect of the sound insulating plate 55 can be improved.

As described above, according to this embodiment, since the upper support point 51 is disposed on the tank cover 6, the noise generating source 2 is covered over a wide area in the height direction. It is possible to provide the sound insulating plate 55 having an improved sound insulating effect.

FIG. 7 is a block diagram of a static induction device according to a seventh embodiment of the present invention (corresponding to claim 2). FIG. 7A is a side view, and FIG. FIG. In this embodiment, the sound insulation plates 61 and 62 divided into two in the horizontal direction are used.
Is mounted on the tank 2, a cushioning material 64 is arranged between the sound insulating plate 61 and the sound insulating plate 62, and a gap between the sound insulating plate 61 and the sound insulating plate 62 is closed by a flexible sealing material 63. The cushioning material 64 is a very flexible elastic material such as a rubber tube, and may have any material and shape as long as it can be disposed in the gap between the sound insulating plates. Further, the sealing material 63 is a material having a property of sealing the gap between the sound insulating plates 61 and 62 and having a property of being flexibly deformed in accordance with the relative displacement of the two sound insulating plates 61 and 62. Etc. The shape of the sealing material is not limited to a tape as long as the above properties are satisfied, and may be any shape, and may be a filler directly embedded in the gap.
Further, the number of divided sound insulation plates is not limited to two, and may be any number according to the size of the tank side surface.

Next, the operation of the present embodiment will be described.
The present embodiment can provide a small and easily transportable sound insulation plate as compared with a case where the sound insulation plate is divided into two pieces to be formed into one piece. It should be noted that, although the sound insulating plate is divided, a new space is created in the space between the adjacent sound insulating plates 61 and 62. However, since these spaces are closed by the flexible sealing material 63, sound leakage from the space is reduced. be able to.

Further, since the cushioning material 64 is disposed between the sound insulation plate 61 and the sound insulation plate 62, the sound insulation plate 61 is assembled.
Even if the tilting is caused by the imbalance of the weights and the positional relationship comes into contact with the adjacent sound insulating plate 62, the flexible cushioning material 64 is deformed, so that it becomes difficult to exert forces on each other as compared with the case of direct contact. . That is, the sound insulation plates 61 and 62
However, due to mutual interference caused by transmitting vibrations, it is possible to prevent an increase in vibrations and an increase in noise generated from the sound insulating plate itself. Therefore, even when the sound insulating plate 61 is assembled in contact with the adjacent sound insulating plate 62, there is no problem that the sound insulating performance is lower than when only one sound insulating plate is used.

As described above, according to the present embodiment, the sound insulation plate is divided, the cushioning material 64 is disposed between the adjacent sound insulation plates 61 and 62, and the gap is closed by the flexible sealing material 63, thereby achieving It is possible to cover the tank surface widely without enlarging the size of the sound insulation plates, and to prevent a decrease in sound insulation performance due to interference between the sound insulation plates.

FIG. 8 is a view showing the construction of a sound insulating plate of a stationary induction device according to an eighth embodiment (corresponding to claim 2) of the present invention. FIG. 8 (a) is a side view, and FIG. 8 (b) is AA. FIG. 3C is a partial sectional view of another sound insulating plate.

In the present embodiment, in the stationary induction device of the seventh embodiment, a portion 68 of one of two adjacent sound insulating plates 66, 67 is provided so as to overlap with the other sound insulating plate 67. The gap generated in the overlapping portion is closed by a flexible sealing material 69. The sealing material 69 is a material having a property of sealing the gap and of being deformed flexibly according to the relative displacement of the two sound insulating plates 66 and 67, and is made of lead molded into a foil tape. Further, as long as the above-mentioned properties are satisfied, the shape of the sealing material 69 is not limited to the tape, and may be any shape, and may be a filler directly embedded in the gap.

Next, the operation of this embodiment will be described.
In this embodiment, the sound radiated from the tank side surface 10 is leaking to the outside from the gap between the sound insulating plate 66 and the sound insulating plate 67.
It bends at the overlapping portion 68 of the sound insulating plate. In general, it is known that when a sound path is bent, there is a silencing effect. The sound radiated from the tank side surface 10 is also attenuated shortly before reaching the seal material 69 due to the sound deadening effect. Therefore, in addition to the effect of the sealing material 69, sound leakage from the gap between the sound insulating plate 66 and the sound insulating plate 67 can be more effectively prevented. The number of overlapping portions is arbitrary, and the above effect can be enhanced by providing a plurality of overlapping portions.

FIG. 9C is a partial cross-sectional view of another sound insulating plate of the present embodiment, in which the sound insulating plate 67 is provided with an overlapping portion 70 so that the sound path is bent twice. . Since there is a sound deadening effect each time a bend occurs, the effect of preventing sound leakage from gaps can be further enhanced.

As described above, according to the present embodiment, one of the adjacent sound insulation plates 66, 67 is provided with a portion 68 overlapping with the other sound insulation plate 67.
The sound that tends to leak to the outside from the gap between the sound insulating plate 66 and the sound insulating plate 67 can be attenuated by bending, and the sound leakage from the gap can be more effectively prevented.

FIG. 9 is a schematic side view of a static induction device according to a ninth embodiment (corresponding to claim 2) of the present invention. This embodiment is different from the stationary induction device of the second embodiment in that intermediate support points 71 and 72 are provided on the upper beam 4 and the sound insulating plate is vertically divided into two upper and lower parts. , The sound insulating plate body 77 via the elastic element 75 and the elastic element 73, respectively.
And a lower support point 52 and an intermediate support point 72.
, A sound insulation plate main body 78 is attached via elastic elements 76 and 74, respectively, and elastic elements 73, 74, 75, and 7 are attached.
6, the gap created between the sound insulating plate main bodies 77 and 78 and the tank 2 is closed with a flexible sealing material 81,
A cushioning material 79 is arranged between the sound insulating plate main body 77 and the sound insulating plate main body 78, and a gap between the sound insulating plate main body 77 and the sound insulating plate main body 78 is closed with a flexible sealing material 82. The cushioning material 79 is a very flexible elastic material such as a tube-shaped rubber, and its material and shape are arbitrary as long as it can be arranged in the gap between the sound insulating plates. Further, the sealing materials 81 and 82 are materials having a property of sealing the gap between the sound insulating plate main body 77 and the sound insulating plate main body 78 and of being deformed flexibly according to the relative displacement between the sound insulating plate main body 77 and the sound insulating plate main body 78. It is made of lead or the like molded into a tape.

The shape of the sealing material is not limited to a tape as long as the above properties are satisfied, and may be a filler which is directly embedded in the gap. Further, the number of divided sound insulation plates is not limited to two, and may be any number according to the size of the tank side surface. Further, the installation of the sound insulating plate may be any of those shown in the sixth to eighth embodiments.

Next, the operation of the present embodiment will be described.
In the present embodiment, the sound insulating plate main body is composed of two sound insulating plate main bodies 77,
The division into 78 makes it possible to provide a sound insulation plate which is small and easy to transport as compared with the case where it is constituted by one sheet. In addition, since the sound insulation plate is divided, the sound insulation plate main bodies 77 and 78 are provided.
A new gap is generated in the gap of the flexible sealing material 82.
Accordingly, these gaps are closed, so that sound leakage from the gaps can be reduced.

Further, since the cushioning member 79 is arranged between the sound insulation plate main bodies 77 and 78, the sound insulation plate main body 7
Even when the weight 7 is tilted from the imbalance in weight and comes into contact with the sound insulating plate main body 78, the flexible cushioning material 79 is deformed and exerts forces on each other as compared with the case where the two directly contact each other. It becomes difficult. That is, it is possible to prevent an increase in vibration due to mutual interference caused by transmission of vibration between the sound insulating plate bodies 77 and 78, and an increase in noise generated from the sound insulating plate itself. Therefore, even when the sound insulating plate main body 77 is assembled in contact with the sound insulating plate main body 78, the problem that the sound insulating performance is lower than when one sound insulating plate is used is eliminated.

As described above, according to the present embodiment, the sound insulating plate is divided vertically into two upper and lower parts, and the cushioning material 79 is arranged between the sound insulating plate main body 77 and the sound insulating plate main body 78 to make the gap flexible. By closing with the sealing material 82, the surface of the tank can be widely covered without increasing the size of one sound insulating plate, and a decrease in sound insulating performance due to interference between the sound insulating plates can be prevented.

FIG. 10 shows a tenth embodiment of the present invention.
FIG. 7A is a partial cross-sectional view of a sound insulating plate of the stationary induction electric device of the present embodiment, and FIG. 7A is a partial cross-sectional view of another sound insulating plate of the present embodiment.

As shown in FIG. 10A, this embodiment is different from the ninth embodiment in that the upper and lower two sound insulating plates 8 are used.
A portion 87 overlapping one of the sound insulating plates 85 is provided on one of the sound insulating plates 85 of the pair 5 and 86, and a gap generated in the overlapping portion is closed with a flexible sealing material 88.
Here, the sealing material 88 is a material having a property of sealing the gap and of being flexibly deformed in accordance with the relative displacement of the two sound insulating plates 85 and 86, and is made of, for example, lead molded into a foil tape. Note that the shape of the sealing material 88 is not limited to a tape as long as the above property is satisfied, and may be a filler that is directly embedded in the gap.

Next, the operation of the present embodiment will be described.
In the present embodiment, the sound radiated from the tank side (not shown) bends at the overlapping portion 87 of the sound insulating plate in an attempt to leak out from the gap between the sound insulating plate 85 and the sound insulating plate 86. In general, it is known that when a sound path is bent, there is a silencing effect. The sound radiated from the tank side surface 10 is also attenuated shortly before reaching the sealing material 88 due to the sound deadening effect. Therefore, in addition to the effect of the sealing material 88, it is possible to more effectively prevent sound leakage from the gap between the sound insulating plate 85 and the sound insulating plate 86. The number of overlapping portions is arbitrary, and the above effect can be enhanced by providing a plurality of overlapping portions.

FIG. 10B is a partial cross-sectional view of another sound insulating plate of this embodiment. The sound insulating plate 86 is also provided with an overlapping portion 90 so that the sound path is bent twice. Each time it bends, there is a sound silencing effect, so that the effect of preventing sound leakage from gaps can be further enhanced.

As described above, according to this embodiment, the upper and lower
By providing a portion 87 that overlaps with the other sound insulating plate 86 on one of the sound insulating plates 86, 86, the sound insulating plate 85 may leak out of the gap between the sound insulating plate 85 and the sound insulating plate 86. Can be attenuated by bending, and sound leakage from gaps can be more effectively prevented.

[0065]

As described above, according to the stationary induction device of the present invention (corresponding to claims 1 and 2), the surface of the tank, which is a noise source, is covered over a wider area, and the vibration of the sound insulating plate is increased. By further increasing the suppression performance, it is possible to provide a sound insulation plate that reduces the sound radiation from the tank side surface and the sound emission due to the vibration of the sound insulation plate itself, so that excellent sound insulation performance can be ensured.

[Brief description of the drawings]

FIGS. 1A and 1B are configuration diagrams of a static induction device according to a first embodiment of the present invention, wherein FIG. 1A is a schematic side view, FIG. 1B is a front view of a sound insulating plate, and FIG. FIG.

FIGS. 2A and 2B are configuration diagrams of a sound insulating plate of a stationary induction device according to a second embodiment of the present invention, wherein FIG. 2A is a schematic side view, FIG. 2B is a front view of the sound insulating plate, and FIG. ) Is a side view of another sound insulating plate.

FIG. 3 is a sectional view of a sound insulating plate of a stationary induction device according to a third embodiment of the present invention.

4A and 4B are configuration diagrams of a sound insulating plate of a stationary induction electric device according to a fourth embodiment of the present invention, wherein FIG. 4A is a front view and FIG. 4B is a partial cross-sectional view of the sound insulating plate.

5 (a) is a front view, FIG. 5 (b) is a partial cross-sectional view of the sound insulating plate, and FIG. () Is a partial sectional view of another sound insulating plate.

FIG. 6 is a schematic side view of a stationary induction device according to a sixth embodiment of the present invention.

FIGS. 7A and 7B are configuration diagrams of a sound insulating plate of a stationary induction device according to a seventh embodiment of the present invention, wherein FIG. 7A is a front view and FIG. 7B is a partial cross-sectional view of the sound insulating plate.

8A and 8B are configuration diagrams of a sound insulating plate of a stationary induction electric device according to an eighth embodiment of the present invention. FIG. 8A is a front view, FIG. 8B is a partial cross-sectional view of the sound insulating plate, and FIG. () Is a partial sectional view of another sound insulating plate.

FIG. 9 is a schematic side view of a static induction device according to a ninth embodiment of the present invention.

FIGS. 10A and 10B are configuration diagrams of a sound insulating plate of a stationary induction device according to a tenth embodiment of the present invention. FIG. 10A is a partial cross-sectional view, and FIG. 10B is a partial cross-sectional view of another sound insulating plate.

11A and 11B are configuration diagrams of a conventional stationary induction device, wherein FIG. 11A is a schematic side view, and FIG. 11B is a front view of a sound insulating plate.

FIG. 12 is a side view of another sound insulating plate of the conventional stationary induction device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 stationary induction device 2 tank 3 10 5 3 tank side 4 upper reinforcing beam 5 lower reinforcing beam 6
... Tank cover, 7, 21, 34, 35, 41, 42,
44, 45, 55, 61, 62, 66, 67, 85, 8
6 ... sound insulation plate, 8, 51 ... upper support point, 9, 52 ... lower support point, 11, 24, 31 ... flat plate, 12, 13, 25 ... reinforcement rib, 15, 16, 56, 57, 73, 74, 75,
76 ... elastic element, 17, 19, 47, 59, 63, 6
9, 81, 82, 88 ... sealing material, 20 ... flange,
14, 22, 28, 32, 54, 77, 78 ... sound insulation plate main body, 23, 26 ... frame type, 27, 29 ... outer frame, 30 ... inner frame, 33 ... sound absorbing material sheet, 43, 64, 79 ... buffer Timber,
46, 48, 68, 70, 87, 90 ... overlapping part, 7
1, 72... Intermediate support points.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shoichi Takeo 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-ku, Kawasaki-shi, Kanagawa Inside the Toshiba Hamakawasaki Plant

Claims (2)

[Claims] 1. A supporting point is provided on a side surface of a tank accommodating a stationary induction device main body together with an insulating oil or an insulating gas so as to be vertically separated from each other, and a sound insulating plate is attached so as to cover an outer surface of a side surface of the tank between the supporting points. In the stationary induction device, the sound insulating plate is a flat sound insulating plate main body provided with a reinforcing member, and a first elastic element disposed between an upper support point of the tank side surface,
A second elastic element disposed between the sound insulating plate main body and a lower support point of the tank side surface, and the first and second elastic elements are disposed, so that a space between the sound insulating plate main body and the tank side surface is provided. The sound insulation plate body is formed by welding a flat plate to a frame formed by welding a shaped steel into a polygonal shape, and a band-like reinforcement is provided to divide the surface of the flat plate. A stationary induction device characterized by being formed with ribs. 2. A supporting point is provided on a side surface of a tank accommodating a stationary induction electric device body together with an insulating oil or an insulating gas so as to be vertically separated from each other, and a sound insulating plate is attached so as to cover an outer surface of the tank side surface between the supporting points. In the stationary induction device, the sound insulating plate is divided into a plurality of parts in the horizontal direction, attached around the tank, a gap between adjacent sound insulating plates is closed with a flexible sealing material, and a cushioning material is arranged between the sound insulating plates. A static induction device characterized by the following.