JPS58170B2 - Transformer sound insulation wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sound insulating wall for a transformer that surrounds a transformer body.

Conventional sound insulation walls for transformers have a double-wall structure with a vacuum in the wall space, but since there is a large area of vacuum space, thick steel plates (
In general, it is necessary to use a wall with a thickness of 9 mm or more), and it is complicated in that it has to have a structure that makes it difficult for the vibrations of the inner wall to be transmitted to the outer wall.For this reason, this type of sound insulating wall is not put into practical use very often. .

Therefore, in view of the above-mentioned drawbacks, the present invention aims to provide a sound insulating wall for a transformer that is vacuum resistant even with a thin wall thickness, has a simple structure, increases vibration isolation, and is easy to put into practical use. It was invented based on an idea.

In order to achieve this object, the present invention provides a sound insulating wall for a transformer in which a plurality of sound insulating walls are combined to cover the periphery of the transformer body, except for one of the flat plate surfaces facing each other as the outer wall of the sound insulating wall. A flat box body with an opening is provided, and a plurality of long groove bodies each made of a thin iron plate having a U-shaped cross section are arranged side by side, and vibration isolating rubber is attached to the open end side of the side wall of the long groove body to form a group of long groove bodies. The vibration isolating rubber of this long groove group is attached to the inside of the flat plate surface of the flat box forming the outer wall, and the gap between the periphery of the long groove group existing on the inside of this flat plate and the flat box is It is characterized in that it is sealed with a flexible ultra-thin iron plate, and the grooves of the long groove body group and the space between the ultra-thin iron plate and the flat box body are evacuated.

Hereinafter, embodiments of a sound insulating wall for a transformer according to the present invention will be described with reference to the drawings.

In FIG. 1A, a sound insulating wall 3 is arranged around the transformer main body 2 placed on a vibration isolating mat 1 so as to wrap around the transformer main body 2, and this sound insulating wall 3 is made to a size convenient for transportation. It is made by combining a plurality of sound insulating walls 3a.

Specifically, a plurality of sound insulating walls 3a are erected on a base 4 built on the ground around the transformer main body 2, and a lid is placed over the erected sound insulating walls 3a above the transformer main body 2. Another sound insulating wall unit 3a is placed so as to cover it.

Therefore, the transformer main body 2 is housed within the single sound insulating wall 3a.

The sound insulating wall units 3a are communicated with each other through a connecting pipe 5, and the bushing 6 is installed on an adapter 7 that passes through the upper sound insulating wall unit 3a.

The sound insulating wall unit 3a itself has a double wall structure consisting of an outer wall 3b and an inner wall 3c, and the inside thereof is maintained in a vacuum state.

The above-mentioned communication pipe 5 connects the sound insulating walls 3a to each other in order to evacuate the inside of all the sound insulating walls 3a through one exhaust port 8.

In Fig. 1B, a single sound insulating wall 3a is placed under the transformer body 2 instead of the vibration isolating mat 1 shown in Fig. 1A, and the single sound insulating wall 3a has a double wall structure, and even if the inside is vacuum, there is a long groove structure as described later. If you make it narrow, it can be used as an underlay.

Figure 2 shows a single sound insulating wall 3a.
The outer wall 3b is a flat box-shaped body 3B with an opening except for one of the opposing flat plate surfaces.
Consisting of

On the other hand, the long groove body 9 is formed by bending a thin iron plate with a thickness of about 3 mm to 4 mm into a U-shape. It has a length that can be stored easily.

A plurality of long groove bodies 9 are arranged side by side in the same direction so as to be in close contact with each other, and vibration isolating rubber 10 is attached to the open end side of the side wall of the adjacent long groove bodies 9.

As for the number of long groove bodies 9 to be arranged side by side, when the long groove bodies 9 are brought into close contact with each other and a plurality of vibration isolating rubbers 10 are attached, the long groove bodies 9 and the vibration isolating rubbers 10 arranged side by side in the flat box body 3B are as follows. The long groove body group, which is a combination of

Therefore, it is obvious that, for example, if the width of the U-shaped bending of the long grooves 9 is narrowed, the number of the long grooves 9 will increase when the size of the flat box body 3B is the same.

In the long groove body group, a plurality of long groove bodies 9 are positioned toward the inside of the flat plate surface that is the bottom of the flat box body 3B so as to cover the opening side of the groove, and the vibration isolating rubber 10 is bonded to the inside of the flat plate surface. .

There is a distance of 0.6 mm to 0.8 mm between the periphery of the long groove group housed in the flat box 3B and the opening periphery of the flat box 3B.
A flexible ultra-thin iron plate 11 with a thickness of
The space between this group of long groove bodies and the flat box body 3B is sealed.

In this way, the inner wall 3c of the single sound insulating wall 3a is formed by the bottom of the long groove body 9, and the space between the inner wall 3c and the outer wall 3b is sealed from the outside.

Therefore, inside the sound insulating wall unit 3a, the exhaust port 8 shown in FIG.
A vacuum can be created by drawing a vacuum from.

The reason why the thickness of the thin iron plate that is the material of the long groove body 9 was determined to be about 3 mm to 4 mm is because the side wall of the long groove body 9 acts as a support, so even if it is made thin to about 3 mm to 4 mm, it can withstand vacuum sufficiently. However, if the thickness of the plate is set to 3 mm to 4 mm or more, it becomes undesirable because it tends to vibrate.

Incidentally, reducing the plate thickness to about 3 mm to 4 mm or less poses a problem in terms of strength as a support.

In addition, the thickness of the ultra-thin iron plate 11 around the long groove body group was set to 0.6
The reason why the plate thickness is set to about 0.8 mm is that if the plate thickness is made thinner, it becomes flexible and vibration-proof, absorbs the slight vibrations of the long groove body 9 that is the inner wall 3c, and is strong enough to maintain a vacuum. This is so that the plurality of vibration isolating rubbers 10 can be uniformly compressed and exhibit a sufficient vibration isolating effect.

Incidentally, the ultra-thin iron plate 11 has vibration-proofing properties second only to the vibration-proofing rubber 10.

It is necessary to provide a through hole for the bushing 6 etc. in the single sound insulating wall 3a, and as shown in FIG. A through tube 13 that almost fits into this through hole 12 is passed through, and the through tube 13 and the flat box body 3B are directly welded.

The thin iron plate of the long groove body 9 is welded via a ring-shaped ultra-thin iron plate 14 made of the same material as the ultra-thin iron plate 11.

A vibration-proof rubber 15 is provided at the end of the through-tube 13, and the vibration-proof rubber 15 is fixed to an adapter that penetrates through the through-tube 13.

This structure is the same even when the oil distribution pipe, drain oil pipe, exhaust intake pipe, etc. of the radiator are passed through.

Moreover, in such a structure, the vacuum is reliably and easily maintained in the sound insulating wall unit 3a by the through tube 13 and the ultra-thin iron plate 15, and vibrations are not directly transmitted to the sound insulating wall unit by the vibration isolating rubber 15.

The same applies to tube 16 in FIG.

When forming the sound insulating wall 3, the sound insulating wall 3a that has passed the vacuum test is assembled so as to cover the entire surface of the transformer body, and then the flanged pipe 17 shown in FIG. This is done by evacuating the inside of 3a from the exhaust port 8.

As embodied in the embodiments above, according to the sound insulation wall for a transformer according to the present invention, a flat box body with an opening except for one of the flat plate surfaces facing each other is provided as the outer wall of the sound insulation wall alone, and a thin iron plate is provided. A plurality of long groove bodies each having a U-shaped cross section are arranged side by side, and vibration isolating rubber is attached to the open end side of the side wall of the long groove bodies to form a long groove body group, and the vibration isolating rubber of this long groove body group forms the outer wall. attached to the inside of the flat surface of the flat box, and sealing the gap between the periphery of the group of long grooves existing inside the flat surface and the flat box with a flexible, ultra-thin iron plate;
By creating a vacuum in the grooves of the long groove body group and the space between the ultra-thin iron plate and the flat box body, even if the long groove body vibrates due to the vibration of the transformer body, the anti-vibration rubber and the ultra-thin iron plate are protected. Since it is supported by a flat box body through a simple structure, vibration transmission can be greatly suppressed and the weight can be reduced, and by installing a group of long grooves, vacuum resistance can be achieved even if the plate thickness is thin. Furthermore, since the sound insulation wall is a combination of single sound insulation walls, a vacuum test can be carried out when the sound insulation walls are completed, making manufacturing and transportation extremely easy.

[Brief explanation of drawings]

1A and 1B are embodiments of sound insulation walls for transformers according to the present invention, A is a block diagram of one embodiment, B is a block diagram of a modification of A, and the second
The figure is an embodiment of the sound insulation wall of a transformer according to the present invention, and is a partially cutaway perspective view of the sound insulation wall alone, and FIG. 3 is a sectional view mainly showing the penetrating portion of the sound insulation wall alone. In the drawing, 3 is a sound insulation wall, 3a is a single sound insulation wall, 3b is an outer wall,
3B is a flat box body, 9 is a long groove body, 10°15 is a vibration isolating rubber, and 11.14 is an extremely thin iron plate.

Claims (1)

[Claims] 1. In a sound insulating wall of a transformer in which a plurality of single sound insulating walls are combined to cover the periphery of the transformer body, a flat box body with an opening except for one of the flat plate surfaces facing each other is provided as an outer wall of the single sound insulating wall. , a plurality of long groove bodies made of thin iron plates having a U-shaped cross section are arranged side by side, and vibration isolating rubber is attached to the open end side of the side wall of the long groove bodies to form a long groove body group, and the vibration isolating rubber of this long groove body group is It is attached to the inside of the flat surface of the flat box forming the outer wall, and the gap between the periphery of the group of long grooves existing inside the flat surface and the flat box is sealed with a flexible ultra-thin iron plate. A sound insulating wall for a transformer, characterized in that a space between the groove of the long groove body group and the space between the ultra-thin iron plate and the flat box body is evacuated.