JP2012119398A - Gas insulated induction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and economical gas insulated induction apparatus which reduces noise, the installation area, and the assembly time, increases a degree of freedom for the layout of components, and has excellent tranquility.SOLUTION: A gas insulated induction apparatus includes a blower 4 forcibly circulating an insulation gas 20 to a tank 1 through a pipeline 21. The blower 4 has a case 44, a motor 46 housed in the case 44, and an impeller 45 receiving a driving force of the motor 46 and rotating, and a power source line 42 led out to the exterior of the tank 1. Further, a fixing plate 43 on which the blower 4 is attached is installed in the tank 1, and the blower 4 is fixed to the fixing plate 43.

Description

  Embodiments described herein relate generally to a gas insulation induction device including a blower.

  In recent years, gas insulation induction devices in which an insulating gas is enclosed have become widespread, instead of oil-filled induction devices in which insulation oil is enclosed. The gas insulation induction device is inferior in insulation performance compared to the oil-filled induction device, and since the insulating gas is nonflammable, excellent safety can be obtained. However, due to the difference in material characteristics, insulating gas has low cooling characteristics at a capacity equivalent to that of insulating oil. Therefore, in the gas insulation induction device, it is necessary to increase the cooling performance to the same level as that of the oil-filled induction device while suppressing the capacity of the insulating gas.

  In view of this, a technique has been proposed in which the insulating gas inside the apparatus is forcibly convected by a blower that is a blower to improve the cooling characteristics of the insulating gas (for example, Patent Documents 1 and 2). Here, a conventional example of a gas insulation induction apparatus provided with a blower will be specifically described with reference to FIGS.

  As shown in FIG. 6, the gas insulation induction device is provided with a tank 1, a blower 4, and a cooler 5. Inside the tank 1 are housed an iron core 2 which is the contents of the induction device and a winding 3 wound around the iron core 2, and an insulating gas 20 is enclosed as a cooling and insulating medium.

  A partition plate 10 for horizontally blocking the flow of the insulating gas 20 in the tank 1 is attached horizontally near the lower portion of the iron core 2 and the winding 3. In addition, an outlet 1a and an inlet 1b for the insulating gas 20 are formed at the upper and lower portions of the tank 1, and a pipe 21 through which the insulating gas 20 flows is attached. The piping 21 has a cross-sectional area that allows the insulating gas 20 to flow at a sufficient flow rate.

  The blower 4 is disposed in the pipe 21 on the side connected to the inflow port 1b, and is connected to a power source (not shown). As shown in FIG. 7, the blower 4 includes a case 44, a motor 45 accommodated in the case 44, and an impeller 46 that rotates by receiving the driving force of the motor 45. The cooler 5 is a device for cooling the insulating gas 20 by heat exchange, and is connected to the tank 1 side via a pipe 21.

  In the gas insulation induction apparatus as described above, the insulating gas 20 circulates in the apparatus as follows. That is, the insulating gas 20 at the upper part of the tank 1 passes through the outlet 1 a and the upper pipe 21 and enters the cooler 5. The insulating gas 20 inside the cooler 5 is heat-exchanged with air, water, etc., is sufficiently cooled, and goes out to the lower pipe 21.

  When the insulating gas 20 flowing through the pipe 21 reaches the blower 4, it flows into the tank 1 from the inlet 1 b by the rotation of the impeller 46. The insulating gas 20 that has entered the tank 1 rises in the tank 1 and flows into the lower part of the iron core 2 and the winding 3 while being blocked by the partition plate 10.

  At this time, the partition plate 10 blocks the flow of the insulating gas 20 so that the insulating gas 20 in the tank 1 flows between the vicinity of the outlet 1a and the inlet 1b, that is, between the upper portion and the lower portion of the tank 1. A differential pressure is generated. However, the insulating gas 20 receives the blowing force of the blower 4 and rises in the tank 1 while ensuring a predetermined flow rate.

  In the gas insulation induction apparatus of FIG. 6, as described above, the circulation closed loop of the insulating gas 20 is configured by the function of the blower 4. For this reason, the insulating gas 20 is heat-exchanged by the cooler 5 and can always maintain a low temperature state, and the heat of the iron core 2 and the winding 3 can be efficiently taken. Therefore, the insulating gas 20 can ensure a cooling characteristic equivalent to that of the insulating oil without increasing the capacity. Thereby, the gas insulation induction device can exhibit the same level of cooling performance as the oil-filled induction device while avoiding an increase in size.

JP-A-10-116737 Japanese Patent Laid-Open No. 11-16743

  However, the above prior art has the following problems to be solved. That is, in the conventional example shown in FIG. 6, since the blower 4 is disposed in the pipe 21, the operation sound of the blower 4 easily leaks from the pipe 21 to the outside. For this reason, the operation sound of the blower 4 greatly affects the operation sound of the guidance device. Therefore, in the gas insulation induction apparatus having the blower 4, low noise measures have been urgently needed.

  Further, the length of the pipe 21 is increased as much as the blower 4 is installed in the pipe 21. Therefore, not only the material cost of the piping 21 is increased, but the installation area of the gas insulation induction device is increased. In addition, by incorporating the blower 4 into the pipe 21, the layout of the pipe 21 and the cooler 5 is restricted.

  If the degree of freedom regarding the layout of the components is reduced, the mounting space for the pipe 21 and the cooler 5 with respect to the tank 1 tends to be narrowed when the gas insulation induction device is assembled. As a result, the installation work of the pipe 21 and the cooler 5 becomes difficult, the assembly time of the apparatus is prolonged, and the cost is increased.

  The gas insulation induction device of the embodiment has been proposed to solve the above-mentioned problems, and it is possible to reduce noise, increase the layout freedom of components, reduce the installation area, and shorten the assembly time. An object of the present invention is to provide a compact and economical gas insulation induction device that is excellent in quietness.

  In order to achieve the above object, the gas insulation induction apparatus of the embodiment is characterized in that a blower is disposed inside the tank. That is, in a gas insulation induction device provided with a blower that forcibly circulates an insulating gas through a pipe to a tank, the blower is rotated by receiving a case, a motor housed in the case, and a driving force of the motor. And an impeller that can be pulled out of the tank. Further, a fixing plate capable of installing the blower is attached in the tank, and the blower is fixed to the fixing plate.

Sectional drawing of 1st Embodiment which concerns on this invention. Sectional drawing of 2nd Embodiment which concerns on this invention. Sectional drawing of the modification of the 2nd Embodiment which concerns on this invention. Sectional drawing of 3rd Embodiment which concerns on this invention. Sectional drawing of the modification of the 3rd Embodiment which concerns on this invention. Sectional drawing of the conventional gas insulation induction apparatus. Sectional drawing which shows the structure of a general blower.

(1) First embodiment
[Constitution]
Hereinafter, the first embodiment will be specifically described with reference to FIG. FIG. 1 is a cross-sectional view showing the configuration of the first embodiment. The first embodiment is a gas insulation induction device having a blower 4 as in the conventional example shown in FIG. 6, and the same reference numerals are assigned to the same members. The structure of the blower 4 is the same as that of the conventional example shown in FIG. 7 and includes a case 44, a motor 45 and an impeller 46.

  The feature of the first embodiment is that the blower 4 is fixedly arranged inside the tank 1, not inside the pipe 21. As shown in FIG. 1, a fixing plate 43 is provided in the vicinity of the inlet 1 b of the insulating gas 20, and the blower 4 is supported and fixed by the fixing plate 43.

  That is, the blower 4 on the fixed plate 43 is disposed near the bottom of the tank 1 at a position facing the inlet 1b. A power line 42 is attached to the blower 4. The power supply line 42 passes through the wall surface of the tank 1 and is drawn to the outside, and is connected to a power supply device (not shown).

[Insulating gas flow]
The circulation closed loop configuration of the insulating gas 20 in the first embodiment is as follows. That is, the insulating gas 20 in the upper part of the tank 1 passes through the outlet 1 a and the upper pipe 21 and enters the cooler 5, where it is cooled and escapes to the lower pipe 21.

  Further, the insulating gas 20 enters the tank 1 through the lower pipe 21 and the inflow port 1b. Next, the insulating gas 20 entering the inside of the tank 1 rises in the tank 1 while receiving a blowing force of the blower 4 and securing a predetermined flow rate. At this time, the insulating gas 20 flows from the lower part of the iron core 2 and the winding 3 while the flow is blocked by the partition plate 10.

  The insulating gas 20 rises while taking heat from the iron core 2 and the winding 3, passes through the upper part of the iron core 2 and the winding 3, and reaches the upper part of the tank 1. The flow of the insulating gas 20 in the first embodiment described above is substantially the same as the flow of the insulating gas 20 in the conventional example shown in FIG. 6, and the flow rate of the insulating gas 20 is reduced compared to the conventional example. There is no.

[Effect]
The first embodiment having the above configuration has the following operational effects. First, by arranging the blower 4 inside the tank 1, the inner wall portion of the tank 1 blocks the operation sound of the blower 4. For this reason, the operation sound of the blower 4 does not directly resonate outside the tank 1 and the noise generated by the guidance device can be greatly reduced.

  Further, the length of the pipe 21 is shortened by the amount of the blower 4 disposed in the tank 1, and the installation area of the induction device can be reduced. In addition, since the blower 4 does not exist around the tank 1, the layout of the pipe 21 and the cooler 5 is not restricted. Therefore, it is possible to easily and quickly attach the pipe 21 and the cooler to the tank 1. Thereby, the assembly time of a gas insulation induction apparatus can be shortened and cost reduction can be aimed at.

(2) Second embodiment
[Constitution]
Next, a second embodiment will be described with reference to FIG. The structural feature of the second embodiment is that a plurality of blowers are arranged inside the tank 1.

  In the second embodiment, two blowers, that is, a blower 4 and an internal circulation blower 41 are arranged inside the tank 1. The basic configuration of the circulation blower 41 is the same as that of the blower 4 shown in FIG. However, since a plurality of blowers are installed, the capacity of each blower can be reduced.

  In the tank 1 according to the second embodiment, the inlet 1b of the insulating gas 20 is formed on the upper side of the right wall surface portion in the drawing, and is near the center portion of the right wall surface portion (near the upper surface of the partition plate 10) in the drawing. The outflow port 1a of the insulating gas 20 is formed. The blower 4 is supported and fixedly arranged on the fixing plate 43 in the vicinity of the inlet 1b of the insulating gas 20 with respect to such a tank 1. Since the blower 4 is disposed at the right end of the upper portion of the tank 1 in the drawing, the insulating gas 20 is sent out to the left of the tank 1.

  On the other hand, the internal circulation blower 41 is fixedly disposed via a fixing plate 43 inside the left wall surface portion of the tank 1 in the drawing and in the vicinity of the upper surface of the partition plate 10. The internal circulation blower 41 is set so as to send the insulating gas 20 descending further downward to the tank 1.

[Insulating gas flow]
The circulation direction of the insulating gas 20 in the second embodiment is set to be opposite to the first embodiment (counterclockwise in FIG. 2). That is, the insulating gas 20 in the tank 1 passes through the outlet 1a at the center of the tank 1 and passes through the lower pipe 21 to enter the cooler 5 where it is cooled.

  The insulating gas 20 having a low temperature in the cooler 5 passes through the upper pipe 21 and enters the tank 1 from the inlet 1 b at the upper part of the tank 1. Here, the insulating gas 20 flows to the left of the tank 1 by the action of the blower 4 and descends along the inner wall surface of the tank 1.

  Although the insulating gas 20 descending in the tank 1 is blocked by the partition plate 10, it is forced downward by the internal circulation blower 41, reaches the lower part of the winding 3, and flows into the lower part of the winding 3. To do. Then, the insulating gas 20 rises while taking heat from the iron core 2 and the winding 3, escapes from the upper part of the iron core 2 and the winding 3, descends in the tank 1, and exits the tank 1 from the outlet 1 a again. Circulates to the cooler 5.

[Function and effect]
In the second embodiment having the above configuration, as in the first embodiment, the inner wall of the tank 1 exhibits a soundproofing effect, so that the noise of the blowers 4 and 41 can be reduced. Furthermore, the length of the piping 21 can be short, and the blowers 4 and 41 are not a restriction when the piping 21 and the cooler 5 are laid out. For this reason, it can contribute to reduction of the installation area of an apparatus and shortening of assembly time.

  In addition, in the second embodiment, the gas inside the tank 1 can be circulated efficiently by additionally arranging the internal circulation blower 41. Therefore, the cooling performance can be greatly improved. In the second embodiment, since a plurality of blowers 4 and 41 are provided, the capacity per blower can be reduced and noise reduction can be promoted compared to the case where a single blower is provided. Is possible.

[Modification of Second Embodiment]
As described in the previous stage, in the second embodiment, it is possible to reduce the capacity and noise of each blower. Therefore, even if the blower is arranged outside the tank 1, the operation sound has a relatively small influence.

  Therefore, as a modification of the second embodiment, as shown in FIG. 3, only one internal circulation blower 41 is arranged in the tank 1, and the blower 4 is disposed outside the upper pipe 21, that is, outside the tank 1 inlet 1b. You may make it arrange | position to. According to such a modification, since the number of blowers arranged in the tank 1 can be reduced, the layout of the internal circulation blower 41 in the tank 1 can be freely determined.

(3) Third embodiment
[Constitution]
Next, a third embodiment will be described with reference to FIG. In the third embodiment, the cooler 5 is disposed above the tank 1. At this time, the outlet 1a of the insulating gas 20 is formed near the right edge of the upper surface of the tank 1, and the inlet 1b of the gas 20 is formed near the left edge of the upper surface of the tank 1.

  Further, the pipe 21 rises vertically from the outlet 1 a and the inlet 1 b and is connected to the left and right end surfaces of the cooler 5. The partition plate 10 in the third embodiment is disposed near the upper part of the iron core 2 and the winding 3. Furthermore, in the third embodiment, two blowers 4 and 41 are fixedly arranged inside the tank 1 by a fixing plate 43.

  Among these, the blower 4 is disposed directly under the inflow port 1 b of the insulating gas 20. Since the blower 4 is located in the upper part of the tank 1, the blower 4 is set so as to send out the insulating gas 20 below the tank 1. On the other hand, the internal circulation blower 41 is disposed below the outflow port 1 a and near the upper surface of the partition plate 10. Therefore, the internal circulation blower 41 is set so as to send the insulating gas 20 upward of the tank 1. The basic configuration of the circulation blower 41 is the same as that of the blower 4 shown in FIG. 7 as in the second embodiment.

[Insulating gas flow]
The circulation direction of the insulating gas 20 in the third embodiment is characterized by flowing from the upper part of the winding 3 toward the lower part. The insulating gas 20 passing through the cooler 5 is set counterclockwise in FIG. 4 as in the second embodiment. That is, the insulating gas 20 in the vicinity of the upper surface portion in the tank 1 exits the tank 1 from the outlet 1a, rises on the right side pipe 21, enters the cooler 5, and is cooled here.

  The insulating gas 20 that has gone out of the cooler 5 and has reached a low temperature moves down the left pipe 21 and passes through the inlet 1b. The insulating gas 20 is forcibly sent into the tank 1 by the action of the blower 4. At this time, the partition plate 10 blocks the flow of the insulating gas 20 descending in the tank 1, and the insulating gas 20 flows from the upper part of the iron core 2 and the winding 3.

  The edge gas 20 that has passed through the iron core 2 and the winding 3 descends while reaching a high temperature, flows out from the lower part of the iron core 2 and the winding 3, and then rises along the right inner wall of the tank 1. When the insulating gas 20 reaches the internal circulation blower 41, the insulating gas 20 is reliably sent to the outlet 1 a by the function of the internal circulation blower 41. Finally, the insulating gas 20 flows out of the tank 1 from the outlet 1a, and circulates again to the cooler 5 through the pipe 21 on the right side.

[Function and effect]
In the third embodiment having the above configuration, in addition to the functions and effects of the second embodiment, there are the following unique functions and effects. That is, since the cooler 5 is disposed in the upper part of the tank 1 and the insulating gas 20 is caused to flow from the upper part to the lower part of the winding 3, the distance between the tank 1 and the cooler 5 is shortened. Therefore, the length dimension of the piping 21 can be significantly shortened, and the required material amount can be reduced. Moreover, since the piping 21 can be easily attached, the assembly time of the apparatus can be shortened, which is extremely advantageous in terms of cost.

[Modification of Third Embodiment]
As a modification of the third embodiment, as shown in FIG. 5, an embodiment in which a double wall 22 is formed on the inner wall of the tank 1 on the side close to the outlet 1 a is also included. In this embodiment, the insulating gas 20 that has passed the iron core 2 and the winding 3 and has reached a high temperature is circulated to the cooler 5 through the double wall 22 of the tank 1. In this case, the internal circulation blower 41 may be disposed below the double wall 22, but may be omitted as shown in FIG.

(4) Other Embodiments The above embodiment relates to a gas insulation induction device, but as a specific device, it can be applied to a gas insulation transformer, a gas insulation reactor, or the like. Further, the number and arrangement of the blowers and partition plates, the installation location of the cooler, and the like can be changed as appropriate.

  The shape of the member can also be changed. For example, the fixing plate may be provided integrally with the blower case. Furthermore, the above embodiments can be appropriately combined. Specifically, the double wall 22 shown in FIG. 5 may be provided on the inner wall of the tank 1 shown in FIG.

DESCRIPTION OF SYMBOLS 1 ... Tank 2 ... Iron core 3 ... Winding 4 ... Blower 41 ... Circulation blower 42 ... Power supply wire 43 ... Fixed plate 44 ... Case 45 ... Motor 46 ... Impeller 5 ... Cooler 10 ... Partition plate 20 ... Insulating gas 21 ... Pipe 22 ... Double wall

Claims (5)

The content of the induction device is composed of an iron core and a winding wound around the iron core, a tank for storing the content is provided, an insulating gas is sealed in the tank as a cooling and insulating medium, and the insulating property A gas insulator provided with a blower that arranges a cooler for cooling gas outside the tank, is connected to the cooler and the tank by a pipe, and forcibly circulates the insulating gas through the pipe to the tank. In the guidance device,
The blower has a case, a motor housed in the case, an impeller that rotates by receiving the driving force of the motor, and a power line that can be drawn out of the tank.
A fixing plate capable of installing the blower is attached in the tank,
A gas insulation induction device, wherein the blower is fixed to the fixing plate.   The gas insulation induction device according to claim 1, wherein a plurality of the fixing plates are attached to the inside of the tank, and the blower is fixed to each fixing plate.   The gas insulation induction device according to claim 2, wherein the blower is fixed in the pipe separately from the blower installed on the fixed plate inside the tank.   The gas insulation induction device according to any one of claims 1 to 3, wherein the insulating gas is allowed to flow from the upper part of the winding toward the lower part.   The gas insulation induction device according to any one of claims 1 to 4, wherein a double wall that passes the insulating gas is formed on an inner wall surface of the tank.

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