JPH10233324A - Low noise transformer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low noise transformer which prevents spreading vibrations to the outside through pipes and exhibits an increased cooling efficiency, by lowering the temperature in the soundproofing tank. SOLUTION: A transformer contains a main transformer body 2, water coolers 3 for cooling the main transformer body 2 in a soundproofing tank 1. A water pipe 7 for connecting the water cooler 3 to an outer device passes through a foundation passage forming the foundation of the soundproofing tank 1 instead of passing through the wall of the soundproofing tank. In this way, there is no pipe connection between the transformer and the cooler which may leak the sound toward the outside. The temperature inside the sound proofing tank 1 is lowered and the cooling efficiency of the transformer is increased. This also contributes to prevention of accidents.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low noise transformer.

[0002]

2. Description of the Related Art In recent years, in order to improve the noise environment around a substation, the development of a low-noise transformer has been particularly required. In order to meet such a demand, a low noise transformer as shown in FIG. 4 has been proposed. That is, the transformer main body 2 is covered with the soundproof tank 1, and the air-cooling cooler 12 for cooling the transformer main body 2 also uses a low noise type.

[0003] In order to further reduce noise, a soundproof material is attached to the inner wall of the soundproof tank 1 or a radiator is used in place of the air-cooled cooler 12 which is one of the noise sources. Measures have been taken.

[0004]

However, the transformer main body 2
Can be covered with the soundproof tank 1, but the oil pipe 5 communicating the cooling device installed outside the soundproof tank 1 with the transformer main body 2.
The vibration of the transformer main body 2 is transmitted to the outside through the transformer insulating oil flowing inside the transformer main body and is radiated as noise. Further, since the corners of the soundproof tank 1 are surrounded by two surfaces, the sound build-up is particularly large. Further, in this part, the reinforcement of the soundproof tank 1 is concentrated, so that the soundproof material cannot be attached, and the noise leaking to the outside is further increased.

On the other hand, the inside of the soundproof tank 1 is
In order to prevent sound leakage from the air, it is difficult to circulate the air heated by the transformer main body 2 because the ventilation is minimized. There was a problem that heat dissipation could not be expected and the cooling efficiency of the transformer was reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to prevent the vibration of a transformer from diffusing to the outside through a pipe connecting a transformer and a cooler, and to control the temperature in a soundproof tank. It is an object of the present invention to provide a low-noise transformer with a reduced cooling efficiency.

[0007]

According to a first aspect of the present invention, there is provided a low-noise transformer comprising a transformer body and a water-cooled cooler for cooling the transformer body in a soundproof tank. While being stored, a water pipe connecting the water-cooled cooler and an external device is configured not to penetrate the soundproof tank wall, but to be connected to an external device through a base penetration portion forming a base surface of the soundproof tank. It is characterized by the following.

According to a second aspect of the present invention, in the low noise type transformer according to the first aspect, several kinds of sound absorbing materials are arranged in the base penetration portion in accordance with frequency characteristics of noise of the transformer. I do.

According to a third aspect of the present invention, in the low noise transformer according to the first aspect, a water pipe for supplying cold water to the water-cooled cooler is provided inside the soundproof tank along the inner wall of the soundproof tank. Was made to make a complete circuit.

According to a fourth aspect of the present invention, in the low-noise transformer according to the first aspect, a water pipe for supplying chilled water is provided with nozzles at several places toward the transformer main body, and the nozzles have a predetermined temperature. It is characterized in that it is configured to be opened at the time of the above.

According to a fifth aspect of the present invention, in the low noise transformer according to the first aspect, a sensor is attached to the nozzle portion, and the oil pump of the water-cooled cooler is stopped on condition that the nozzle is opened. A control device for instructing a stop of the operation of the transformer is provided.

According to a sixth aspect of the present invention, in the low-noise transformer according to the first aspect, a water pipe for supplying cold water is bent twice at a corner of the soundproof tank, and is horizontal so as to oppose the corner. A straight section is provided, and a lead curtain supported by a horizontal straight section of the water pipe is provided.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a low-noise transformer according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA in FIG.

As shown in FIG. 1, a transformer main body 2 and a water-cooled cooler 3 as a cooling device for the transformer are arranged in a soundproof tank 1. The water-cooled cooler 3 communicates with the transformer main body 2 via an oil pump 4 via an oil pipe 5. The water to be supplied to the water-cooled cooler 3 is supplied by a water pipe 7 which penetrates the foundation in the soundproof tank 1 through the basement of the transformer base surface 6 and makes one round in the soundproof tank 1 along the inner wall of the soundproof tank 1. You.

The water discharged from the water-cooled cooler 3 is discharged through a water pipe 8 that directly penetrates the foundation in the soundproof tank 1 and communicates with the outside through the underground of the transformer base surface 6. In the part where the water pipes 7, 8 penetrate the foundation in the soundproof tank 1,
The sound absorbing material 9 is packed.

In the low noise transformer constructed as described above (corresponding to claim 1), since both the transformer and the cooling device are housed in the soundproof tank 1, the transformer which is a source of noise is generated. The vibration of the main body 2 does not leak out through the cooling pipe. In addition, since the water pipes 7 and 8 of the water-cooled cooler 3 do not come into contact with the oil pipe 5 or the transformer insulating oil flowing inside and do not penetrate the wall of the soundproof tank 1, vibration is transmitted to the soundproof tank 1. There is no. By filling the sound absorbing material 9 in the portion where the water pipes 7 and 8 penetrate the foundation, sound leakage can be prevented.

In the low-noise transformer of this embodiment (corresponding to claim 2), the frequency characteristics of the noise of the transformer main body 2 are measured, and several types of sound absorbing materials 9 corresponding to the respective frequency characteristics are superposed. By attaching the water pipes 7 and 8 to the through portions of the foundation, the effect of preventing sound leakage can be enhanced.

Further, in the low noise transformer of the present embodiment (corresponding to claim 3 and claim 4), the cooling water to be supplied to the water-cooled cooler 3 is made to go around the soundproof tank 1 by the water pipe 7 so as to make the soundproofing. The air in the tank 1 can be cooled by the water pipe 7, and heat radiation from the tank surface of the transformer body 2 can be promoted. Further, since the water pipe 7 is arranged along the inner wall of the soundproof tank 1 so as to surround the transformer main body 2, the nozzle 1 is disposed at several places of the water pipe 7 toward the transformer main body 2.
If a zero is provided and the tip of the nozzle 10 detects heat and is opened, even if a fire occurs from the transformer main body 2, the water pipe 7 for the water-cooled cooler can be diverted to the fire extinguishing pipe of the transformer. it can. At this time, since the water cutoff relay (not shown) of the water pipe 8 operates, it is possible to externally detect that an abnormality has occurred in the soundproof tank 1.

The low-noise transformer of the present embodiment (corresponding to claim 5) has a sensor attached to the nozzle 10 together with a water cut-off relay (not shown) for the water pipe 8, and when the nozzle 10 is opened, the sensor from the sensor is opened. By stopping the oil pump 4 of the water-cooled cooler 3 and stopping the operation of the transformer main body 2 according to the signal, the influence of the fire on the transformer main body 2 can be minimized.

FIG. 3 shows another embodiment (corresponding to claim 6) of the present invention, and is an enlarged view of a corner portion of the soundproof tank 1 of FIG. This embodiment is different from the embodiment of FIG.
Is bent twice at the corners of the soundproof tank 1, a horizontal straight portion is provided opposite the corners of the soundproof tank 1, and the lead curtain 11 is supported by the horizontal straight portions.

By supporting the lead curtain 11 at the horizontal straight portion of the water pipe 7 as described above, when the sound of the transformer body 2 is concentrated on the corner of the soundproof tank 1, the lead supported by the water pipe 7 The curtain 11 measures the diffusion of the sound at the corners in the soundproof tank 1 and can prevent the sound pressure from increasing at the corners. In addition,
The same effect as in the present embodiment in which a sound absorbing material may be attached instead of the lead curtain 11 is obtained.

[0022]

As described above, according to the first to sixth aspects of the present invention, it is possible to prevent sound from leaking to the outside by a pipe connecting the transformer and the cooler, and to reduce the temperature in the soundproof tank. It is possible to provide a low-noise transformer in which the cooling efficiency of the transformer is reduced and the transformer is taken into consideration for disaster prevention.

[Brief description of the drawings]

FIG. 1 is a plan layout view of an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view of a corner portion of a soundproof tank according to another embodiment of the present invention.

FIG. 4 is a layout diagram of a low-noise transformer using a conventional air-cooled cooler.

[Explanation of symbols]

1 ... Soundproof tank, 2 ... Transformer body, 3 ... Water-cooled cooler, 4
... oil pump, 5 ... oil piping, 6 ... transformer base surface, 7,8
... water pipe, 9 ... sound absorbing material, 10 ... nozzle, 11 ... lead curtain, 12 ... air-cooled cooler, 13 ... cooler stand.

Claims (6)

[Claims] 1. A transformer body and a water-cooled cooler for cooling the transformer body are housed in a soundproof tank, and a water pipe connecting the water-cooled cooler and an external device is penetrated through the soundproof tank wall. A low-noise transformer which is configured to be connected to an external device through a base penetration portion forming a base surface of the soundproof tank. 2. The low-noise transformer according to claim 1, wherein several types of sound absorbing materials are arranged in the base penetration portion in accordance with the frequency characteristics of the noise of the transformer. . 3. The low-noise transformer according to claim 1, wherein a water pipe for supplying cold water to the water-cooled cooler substantially makes a round of the inside of the soundproof tank along the inner wall of the soundproof tank. A low-noise transformer. 4. The low-noise transformer according to claim 1, wherein the water pipe for supplying cold water is provided with nozzles at several places toward the transformer main body, and the nozzles are opened when the temperature is higher than a predetermined temperature. A low-noise transformer characterized by comprising. 5. The low noise transformer according to claim 4, wherein a sensor is attached to the nozzle portion, and the oil pump of the water-cooled cooler and the operation stop of the transformer are stopped on condition that the nozzle is opened. A low noise transformer comprising a control device for instructing. 6. The low noise transformer according to claim 1, wherein the water pipe for supplying the cold water is bent twice at a corner of the soundproof tank, and a horizontal straight section is provided so as to oppose the corner. A low noise transformer comprising a lead curtain supported by a horizontal straight portion of a water pipe.