JPH09102421A - Gas insulated induction device and tank for gas insulated induction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a smaller size and high resistance to gas pressure, by forming a mirror plate portion which has a linear cross section of substantially the same shape as the contour of the iron core, viewed from a direction of thickness of an iron core, and has a curved cross section, viewed from the other side. SOLUTION: A tank 3 is divided into an upper tank and a lower tank, which include cylindrical bodies 4, 5, mirror plate 6, 7, and flanges 8, 9, respectively. Viewed from a direction of thickness of an iron core, the tank 3 has a rectangular shape which is the same as that of an iron core 1, and the mirror plates 6, 7 are linearly shaped. On the other hand, viewed from a direction perpendicular to the above direction, the mirror plates 6, 7 are formed into a bowl-like shape. End surfaces of the cylindrical bodies 4, 5 on the side of the iron core and outer peripheries of the mirror plates 6, 7 are formed along points of intersection where points in the circumferential direction intersect. Since the cylindrical tank, viewed from the direction of thickness of the iron core, has a rectangular cross section which is of the same shape as that of the iron core, a redundant space may be eliminated and thus the tank 3 may be reduced in size.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved gas-insulated induction machine and a tank for a gas-insulated induction machine, and more particularly to a gas-insulated induction machine and a gas-insulated induction machine in which an insulating gas such as high-pressure SF6 gas is sealed. It is related to the tank for use.

[0002]

2. Description of the Related Art Conventionally, as a tank for an induction electric machine of this type, a tank as disclosed in, for example, Japanese Patent Laid-Open No. 56-4218 is adopted. In this case, since the tank is filled with high-pressure gas such as SF6 gas, its body is formed into a cylindrical shape, and the end plate portions at both ends thereof have a standard shape such as a flat shape, an elliptical shape, or a hemispherical shape ( (Curvature) is usually the end plate.

[0003]

In urban underground substations, downsizing of equipment is strongly required because it is difficult to secure a site and the construction cost is reduced by reducing the depth of underground excavation. Is desired. On the other hand, the restrictions on transportation are becoming stricter year by year, and from this aspect, it is inevitable to reduce the height, width, and weight of products.

The size of the cylindrical tank of this type of induction electric device is determined by the shape of the main body of the induction electric device housed therein, particularly the shape of the iron core as seen from the stacking direction. The shape of the iron core in this kind of electric induction machine is usually rectangular,
When this is put inside the tank formed from the above-mentioned end plate part and cylindrical body part, the bulge part of the end plate part becomes empty and becomes an extra space, and the size of the tank increases by this amount, and the building The drawbacks are increased height and footprint, as well as increased transport dimensions.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to make an induction electric device in which a high-pressure gas is enclosed, small in size, sufficiently resistant to the gas pressure, and to reduce the construction cost of an underground substation. It is an object of the present invention to provide a gas-insulated induction electric machine and a tank for the gas-insulated induction electric machine which can be reduced in size and transportation size.

[0006]

That is, according to the present invention, a tank body having a cylindrical shape and having a flange at an end thereof, and a tank body arranged at both ends of the tank body and combined with a flange of the tank body. In a tank for a gas-insulated induction machine, which is formed so as to house a main body of an induction electric machine including a laminated iron core and a winding and a high-pressure insulating gas, the shape of the end plate section. In order to achieve the intended purpose, the cross section viewed from the stacking thickness direction of the iron core has a linear shape that is substantially the same as the contour of the iron core, and the cross section in other directions forms a curved shape. It was done.

The present invention further comprises an induction electric device main body having a laminated iron core and windings wound around the iron core, and a tank accommodating the induction electric electric device main body and high-pressure insulating gas. A tank body having a cylindrical shape and having flanges at its ends, and an end plate portion having flanges arranged at both ends of the tank body and combined with the flanges of the tank body, In a gas-insulated induction electric device that is formed so that it can be divided into two parts, the shape of the end plate part provided at the end of the tank is approximately the same as the outline of the iron core in a cross section seen from the stacking direction of the iron core. Is formed so as to have a straight line shape and has a curved shape in a cross section in the other direction.

That is, in the thus-formed tank for a gas-insulated induction electric machine, the end plate portion has a linear shape which is substantially the same as the contour of the core in the cross section of the laminated core viewed from the stacking thickness direction. Moreover, since it is formed to have a curved shape in the cross section in the other direction, the extra space formed between the laminated iron core and the end plate is eliminated, that is, the tank becomes smaller by this amount, and the curved shape is formed. The withstand voltage is maintained by the end plate that makes up the high pressure gas, so even if it is an induction electric machine that is filled with high pressure gas, it can be made small enough to withstand the gas pressure, and it is possible to reduce the construction cost of underground substations and the transportation size. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. 1 and 2 show in cross section a gas-insulated induction machine equipped with the tank. As shown in this figure, the tank 3 has a cylindrical shape.
The inside of the inductor is the induction body, that is, the laminated iron core 1
Further, the winding 2 wound around the iron core is housed, and SF6 gas is sealed in these spaces. Note that FIG. 1 is a cross section viewed from the stack thickness direction of the iron core, and a cross section viewed from the direction perpendicular to this is shown in FIG.

The tank 3 is divided into an upper tank and a lower tank, each of which is composed of a cylindrical body 4, 5, an end plate 6, 7, and a flange 8, 9. When viewed from the stacking direction of the iron core, as shown in FIG. 1, the tank 3 has the same rectangular shape as the iron core 1, and the end plates 6 and 7 are linear. On the other hand, when viewed from the direction perpendicular to this, the end plates 6 and 7 are in the shape of a mirror as shown in FIG. The end faces of the cylindrical barrels 4 and 5 on the end plate side and the outer peripheries of the end plates 6 and 7 are formed along intersections where these points in the circumferential direction hit each other. In the figure, 10 is an iron core pedestal, and 11 is a base material.

As described above, according to the present embodiment, since the cylindrical tank has a rectangular cross section as viewed from the stacking direction of the iron core, which is the same shape as the iron core, an extra space can be eliminated,
The tank can be reduced. Body diameter is φ3500 (m
In the tank of about m), the tank according to the present embodiment has a diameter of about 200 as compared with a tank using an ordinary flat mirror plate.
mm, height can be reduced by about 650 mm.

FIGS. 3 and 4 show another embodiment of the present invention. In this embodiment, the cross sections of the end plates 6 and 7 in the above embodiment as seen from the direction perpendicular to the stacking direction of the iron core. The shape is an arc as shown in FIG.
In such a tank, the effect of size reduction is almost the same as that of the above-mentioned embodiment, but since the cross section of the end plate is an arc, it is easier to manufacture than the above-mentioned embodiment.

FIGS. 5 and 6 show a further embodiment of the present invention. In this embodiment, the end plate 6 of the upper tank is the same as the embodiment shown in FIGS. ,
As the mirror plate 7 of the lower tank, a flat mirror plate with rounded corners is used, and the central portion of the flat portion is a thick plate member 12 for traveling to the inside of the tank. The iron core 1 is arranged on the thick plate material 12 via the iron core base 13, and as shown in FIG. 5, the lower corner portion of the iron core does not touch the rounded portion of the corner of the end plate 7 as seen in the stacking direction of the iron core. Is done.

In such a tank, since the flat central portion of the flat mirror plate is thickened, the strength against internal pressure can be secured, and the thickened portion is sent to the inside of the tank. Since the radius of the roundness of the corners of the end plate 7 can be increased, the increase in the thickness of the end plates 7 and 12 can be small. As described above, in this embodiment, by using the flat end plate, it is possible to provide a cylindrical tank having a large height reducing effect, although the weight is slightly increased as compared with the above-described embodiments. With a tank having a body diameter of about φ3500 (mm), the height of the tank of this embodiment can be further reduced by about 100 mm as compared with the above-described embodiment.

7 and 8 show another embodiment of the present invention. In this embodiment, both the upper and lower end plates 6 and 7 are the flat end plates shown in the above embodiment. In the case of a tank having a body diameter of about 3500 (mm), the height of the tank of this embodiment is about 5 more than that of the above-mentioned embodiment.
It can be reduced by 0 mm.

FIG. 9 shows still another embodiment of the present invention. In this embodiment, a removable reinforcing member 22 is provided on the upper surface of the tank. A plurality of mounting seats 23 that travel to the inside of the end plate are attached to the upper end plate 6, and the mounting seats are provided with threaded holes 24 that do not penetrate to attach the reinforcing member 22. In such a tank, the effect of reducing the diameter of the cylindrical barrel and the height of the tank is almost the same as that of the above-described embodiment, but the reinforcing member 22 can be removed during transportation and reattached at the site.
The plate thickness can be reduced, and the transport weight can be reduced accordingly.

FIGS. 10 and 11 show still another embodiment of the present invention. In this embodiment, the end plate 6,
The structure of 7 is the same as that of the embodiment shown in FIGS. 5 and 6, and a reinforcing member 14 continuous in the longitudinal direction of the iron core is attached to the inside of the lower end plate. In such a tank, the effect of size reduction is the same as that of the above-mentioned embodiment, but the reinforcing member 14 is used.
The plate thickness can be reduced by the amount of mounting.

12 and 13 show still another embodiment of the present invention. In this embodiment, the outer peripheral shape of the flanges 8 and 9 for dividing the tank is made oval, and the direction of the minor axis thereof. , The same direction as the thickness direction of the iron core 1. Further, this short diameter is the same as the outer diameter of the cylindrical body 5 of the lower tank. Further, the body 4 and the end plate 6 of the upper tank are configured to have a width smaller than the short diameter of the flanges 8 and 9 as shown in FIG. The flange 15 of the upper tank is attached so that the bolt 15 connecting the flanges can be attached to the stepped portion due to the difference.
A play hole 16 is provided in the lower tank, and a screw hole 17 that does not penetrate the flange 9 of the lower tank is provided.

In such a tank, the effect of reducing the diameter of the cylindrical cylinder and the height of the tank is the same as that of the above-mentioned embodiment, but the flanges 8 and 9 are oval, and the flange is larger than the cylinder in the stacking direction of the iron core. Since no business trip is made, the width dimension during transportation can be reduced by this amount. In addition, the body 4 and the end plate 6 of the upper tank
Since the width of is smaller than the width of the flanges 8 and 9, the flanges are connected. The bolt 15 can be mounted on the outside of the tank as usual.

FIGS. 14 and 15 show still another embodiment of the present invention. In this embodiment, a standard dish-shaped end plate 7 is used as the end plate of the lower tank, and inside the end plate,
Short cylindrical reinforcing members 18 and 19 are arranged and mounted concentrically with the end plate 7, and iron core pedestals 20 and 21 are mounted on the reinforcing members.

In such a tank, the reinforcing members 18, 19
Is cylindrical and is arranged concentrically with the end plate 7, so that the heights thereof are constant in the circumferential direction, so that the manufacturing is easy. Further, since the upper surfaces of the reinforcing members 18 and 19 are at the same level, the iron core pedestals 20 and 21 can be plate materials having a constant thickness, which facilitates manufacturing.

As described above, the induction tank according to the present invention can be made into a compact cylindrical tank, and further, each embodiment has further effects.

[0023]

As described above, according to the present invention, the shape of the end plate portion is a linear shape having substantially the same shape as the contour of the iron core in the cross section of the laminated iron core when viewed from the stacking thickness direction, and Since the cross section in the direction of is curved, the extra space formed between the laminated iron core and the mirror plate is eliminated, that is, the tank becomes smaller by this amount and the curved mirror plate is used. This type of gas can maintain its withstand pressure, and therefore, even if it is an induction electric device that is filled with high-pressure gas, it can be made small enough to withstand the gas pressure, and can reduce the construction cost of underground substations and transportation dimensions. It is possible to obtain a tank for an insulation induction machine and a gas insulation induction machine.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a gas insulated induction electric device of the present invention.

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

FIG. 3 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

6 is a sectional view taken along the line CC of FIG.

FIG. 7 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

8 is a cross-sectional view taken along the line DD of FIG.

FIG. 9 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

FIG. 10 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

FIG. 11 is a sectional view of FIG. 10;

FIG. 12 is a vertical sectional side view showing another embodiment of the gas insulated induction electric device of the present invention.

FIG. 13 is a plan view of FIG.

FIG. 14 is a vertical side view showing another embodiment of the gas insulated induction electric device of the present invention.

FIG. 15 is a plan view of FIG.

[Explanation of symbols]

1 ... laminated core, 2 ... winding, 3 ... tank, 4, 5 ... body part,
6, 7 ... End plate, 8, 9 ... Flange.

Front Page Continuation (72) Inventor Shuzo Sakaguchi 1-1-1, Kokubuncho, Hitachi City, Ibaraki Hitachi Kokubun Plant, Ltd. (72) Inventor Toshiyuki Nosaka 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 within Kokubun Plant, Hitachi, Ltd. (72) Inventor Yoshihiro Nagao 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Within Kokubun Plant, Hitachi Ltd.

Claims (13)

[Claims] 1. A tank body having a cylindrical shape and having flanges at its ends, and an end plate portion having flanges arranged at both ends of the tank body and combined with the flanges of the tank body. In the tank for a gas-insulated induction machine, which is formed so as to house a main body of an induction machine including a laminated iron core and a winding and a high-voltage insulation gas, the shape of the end plate part is changed from the stacking direction of the core. A tank for a gas-insulated induction electric machine, characterized in that it has a linear shape that is substantially the same as the contour of the iron core in the cross section as seen, and has a curved shape in the cross section in other directions. 2. A tank body having a cylindrical shape and having flanges at its ends, and an end plate portion having flanges arranged at both ends of the tank body and combined with the flanges of the tank body. In the gas-insulated induction electric device tank, which is formed so as to house the main body of the induction electric device including the laminated iron core and the winding, and the high-voltage insulating gas, the shape of the end plate portion is seen from the stacking direction of the iron core. The cross section has a straight shape, and the cross section viewed from other directions has a curved shape, and the cut shape of the cylindrical body end portion follows the shape of the end plate so as to hit the end plate at each point in the circumferential direction. A tank for a gas insulated induction electric device, which is formed so as to form a curved line. 3. The end plate portion has a linear shape in a cross section viewed from the stacking direction of the iron core, and a cross section in a direction perpendicular to the cross section forms all or part of the cross sectional shape of the end plate having a standard curvature. 2. The tank for gas-insulated induction electric appliances according to 2. 4. The tank for a gas-insulated induction electric appliance according to claim 1, wherein the end plate has a linear shape in a cross section as viewed from the thickness direction of the iron core and a circular arc in a cross section perpendicular to the iron core. 5. A tank body having a cylindrical shape and having a flange at an end thereof, and an end plate portion having flanges arranged at both ends of the tank body and combined with the flanges of the tank body. A gas-insulated induction electric device tank which is formed so as to house a high-voltage insulating gas and an induction electric device main body including a laminated iron core and a winding therein, wherein the shape of the end plate portion is flat with a rounded corner. On the deck,
Also, a tank for a gas-insulated induction electric machine, characterized in that all or a part of the flat part is formed thick and a part or part of the thickened part is made to travel to the inside of the tank. 6. The tank for a gas insulated induction electric device according to claim 1, wherein a detachable reinforcing member is attached to an outer surface of the end plate portion. 7. The tank for a gas insulated induction electric device according to claim 6, wherein a reinforcing member continuous in the longitudinal direction of the iron core is provided inside the end plate portion. 8. The outer diameter of the flange of the tank body is substantially equal to the diameter of the tank body on the side facing the stacking direction of the iron core, and the outer diameter of the other side is larger than the diameter of the tank body. The tank for a gas-insulated induction electric machine according to claim 6, which is an oval shape. 9. A tank for a gas-insulated induction machine, comprising: a tank body for accommodating an induction machine body including an iron core and a winding therein; and one or more sets of flanges for dividing the tank into two or more parts. One or both of the tanks in the above shall have a plane shape in which the longitudinal width of the iron core is approximately the same as the diameter of the adjacent tank and the width in the direction perpendicular to this is smaller than the diameter of the adjacent tank. There is, and the flange for connecting the tank at the end is characterized in that its outer peripheral side shape is an elliptical shape, and its minor axis direction is attached so as to be a direction perpendicular to the longitudinal direction of the iron core. A gas-insulated induction electric tank. 10. The tank according to claim 1, wherein the tank is a vertical tank, and an iron core pedestal is provided inside the bottom end plate, and a reinforcing member is connected to the iron pedestal seat and is attached inside the end plate. Tank for gas-insulated induction machine as described. 11. The tank is a vertical type tank, an iron core pedestal is provided on the upper surface of the bottom end plate, and a base member is attached to the lower surface of the bottom end plate so as to be planarly aligned with the iron end pedestal. The gas-insulated induction electric device tank according to any one of claims 1 to 10. 12. A tank body having a cylindrical shape and having flanges at its ends, and an end plate portion having flanges arranged at both ends of the tank body and combined with the flanges of the tank body. In the tank for the gas-insulated induction machine, which is formed so as to house the main body of the induction machine including the laminated iron core and the winding and the high-voltage insulation gas therein, and is used as a vertical type, the shape of the end plate part is In the cross section viewed from the stacking thickness direction of the iron core, a straight line having substantially the same shape as the contour of the iron core is formed, and in the cross section in the other direction, it is formed to have a curved shape, and 1 or inside the bottom end plate portion. A tank for a gas-insulated induction electric machine, comprising two or more concentric cylindrical or arcuate reinforcing members arranged concentrically with an end plate portion, and an iron core pedestal provided on the member. 13. An induction body having a laminated iron core and windings wound around the iron core, and a tank containing the induction body and a high-pressure insulating gas, the tank having a cylindrical shape. And has a tank body portion having a flange at its end, and an end plate portion having flanges arranged at both ends of the tank body portion and combined with the flanges of the tank body portion, and divided into at least two. In a gas-insulated induction electric device that is formed so that the shape of the end plate portion provided at the end of the tank is a linear shape that is substantially the same as the contour of the iron core in a cross section viewed from the stacking thickness direction of the iron core. And a gas-insulated induction electric device characterized by being formed so as to have a curved shape in a cross section in the other direction.