JP2023182020A - Gas insulation stationary induction electric apparatus - Google Patents

Abstract

To provide a gas insulation stationary induction electric apparatus capable of being conveyed to an installation place by achieving a division structure.SOLUTION: A gas insulation stationary induction electric apparatus of an embodiment, is a gas insulation stationary induction electric apparatus constructed to house a winding wound around an iron core in an inner part of a tank into which an insulation gas is sealed, in which the tank comprises: a plurality of axial division tanks obtained by dividing the tank into plurality in an axial direction; and flanges that are provided respectively to the plurality of axial division tanks.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to gas insulated stationary induction appliances.

Gas-insulated stationary induction electrical appliances that use an insulating inert gas as the insulation and cooling medium are non-combustible and highly explosion-proof, and there is no risk of oil leakage, so they can be used in underground substations in urban areas and in hydroelectric power plants. It is operated at ground substations in coastal areas.

However, in gas-insulated stationary induction electric appliances operating in limited installation spaces such as underground substations, it is often difficult to transport the main body tank (including core, coil, etc.) in an integrated state. In particular, when replacing oil-insulated stationary induction appliances with gas-insulated stationary induction appliances, oil-insulated stationary induction appliances and gas-insulated stationary induction appliances may not be able to be transported in one piece because the tank aspect ratios are significantly different.

JP2019-197838A

Gas-insulated stationary induction appliances require a strict dust-proof environment during manufacturing, so traditionally gas-insulated stationary induction appliances were assembled in a factory, etc., and then transported with the main tank sealed, using an integrated transportation method. . Therefore, it is difficult to install gas-insulated stationary induction appliances in locations with severe size and mass restrictions during transportation, so measures have been taken to widen transportation routes in advance.

The problem to be solved by the present invention is to provide a gas-insulated stationary induction electric appliance that can be transported to an installation site by having a divided structure.

In order to solve the above problems, the gas-insulated stationary induction electric appliance of the embodiment is a gas-insulated stationary induction electric appliance that is configured by storing a winding wound around an iron core inside a tank filled with an insulating gas. The tank includes a plurality of axially divided tanks obtained by dividing the tank into a plurality of axially divided tanks, and a flange provided on each of the plurality of axially divided tanks.

FIG. 1 is a perspective view of a gas-insulated stationary induction appliance according to a first embodiment. FIG. 2 is a sectional view taken along line a-a in FIG. 1; FIG. 1 is a front view of the stationary induction electric appliance main body according to the first embodiment. FIG. 6 is a diagram regarding a modification of the gas-insulated stationary induction appliance according to the first embodiment. FIG. 7 is a side view of a gas-insulated stationary induction appliance according to a second embodiment. FIG. 7 is a perspective view of a gas-insulated stationary induction appliance according to a third embodiment. FIG. 7 is a diagram of a divided tank according to a third embodiment.

Embodiments for carrying out the invention will be described below.

(First embodiment)
FIG. 1 is a perspective view of a gas-insulated stationary induction appliance according to a first embodiment. FIG. 2 is a sectional view taken along line aa in FIG. 1. As shown in FIGS. 1 and 2, the gas-insulated stationary induction electric appliance 1 includes a stationary induction electric appliance main body 10, and a tank 20, which is a pressure vessel and seals insulating gas and stores the stationary induction electric appliance main body 10 inside. Equipped with

FIG. 3 is a front view of the stationary induction appliance main body. The stationary induction electric appliance body 10 constitutes, for example, a three-phase tripod transformer. The stationary induction electric appliance main body 10 includes a winding 11 and an iron core 12. Three windings 11 are provided. Each winding 11 is wound around the iron core 12 such that the winding axis runs substantially vertically. The iron core 12 includes three legs 13 around which the winding 11 is wound, and a yoke 14 connected to the end of each leg 13. The three legs 13 extend substantially vertically and are arranged at substantially equal intervals in a substantially horizontal direction (substantially axial direction). The yoke 14 extends substantially horizontally (substantially in the axial direction) and connects the upper ends and lower ends of the legs 13 to each other. With this configuration, the magnetic flux generated by the winding 11 flows through the magnetic path formed by the legs 13 and the yoke 14. Note that the stationary induction electric appliance main body 10 is not limited to a three-phase, three-legged transformer, and may be, for example, a three-phase, five-legged transformer.

As shown in FIG. 1, the tank 20 has a cylindrical shape and is divided into two parts, an upper axially divided tank 20A and a lower axially divided tank 20B, on a plane parallel to the axial direction. Here, the axial direction refers to the direction along the central axis of the tank 20, and the radial direction of the tank 20 is simply referred to as the radial direction. The tank 20 includes a pair of semi-cylindrical body plates 21A and 21B that combine to form a cylindrical shape, end plates 22A, 22B, 22C, and 22D that close both ends of the tank 20, an axially divided tank upper part 20A, and an axially divided tank upper part 20A It includes a pair of flanges 23A and 23B that connect the divided tank lower part 20B. The tank 20 is constructed by vertically combining an axially divided tank upper part 20A consisting of a body plate 21A, a head plate 22A, and a head plate 22C, and an axially divided tank lower part 20B consisting of a body plate 21B, a head plate 22B, and a head plate 22D into a flange. It is formed by connecting 23A and 23B.

The body plates 21A and 21B are arranged in combination one above the other so as to surround the stationary induction electric appliance main body 10. The body plates 21A and 21B extend along the axial direction in which the legs 13 of the iron core 12 are lined up, and are made of, for example, mild steel.

The end plates 22A to 22D are formed into semicircular shapes having approximately the same diameter as the axial cross section of the body plates 21A and 21B. The mirror plates 22A and 22B and the mirror plates 22C and 22D are combined to form a circular shape. The end plates 22A and 22C are fixed to the body plate 21A by, for example, welding, and the end plates 22B and 22D are fixed to the body plate 21B by, for example, welding. The end plates 22A to 22D have, for example, a flat shape or a dish shape, and are made of, for example, mild steel.

The flange 23A is provided at a connecting portion of the body plate 21A, the end plate 22A, and the end plate 22C. The flange 23B is provided at a connecting portion between the body plate 21B, the end plate 22B, and the end plate 22D. The flanges 23A and 23B are connected by, for example, welding, bolting, riveting, tightening with a clamp component, etc., thereby connecting the axially divided tank upper part 20A and the axially divided tank lower part 20B to form the tank 20. The flanges 23A and 23B are connected with a strength that can withstand, for example, a tank internal pressure of 0.2 MPa abs or more. Note that the flanges 23A and 23B are preferably connected at the installation location using a method that avoids welding, such as port fastening.

Next, the operation of this embodiment will be explained.

By having the above configuration, the gas insulated stationary induction electric appliance 1 of this embodiment can be carried in a divided state to an installation site, and after being carried in, the gas insulated stationary induction electric appliance 1 can be assembled. Specifically, for example, the stationary induction appliance main body 10, the axially divided tank upper part 20A, and the axially divided tank lower part 20B are carried to the installation location of the gas-insulated stationary induction appliance 1. Next, the axially divided tank upper part 20A and the axially divided tank lower part 20B are connected via the flange 23A and the flange 23B so that the stationary induction electric appliance body 10 is housed inside. At this time, an insulating inert gas is sealed inside the tank 20 together with the stationary induction electric appliance main body 10.

As described above, according to this embodiment, the tank of the gas-insulated stationary induction electric appliance can be delivered in a divided state and assembled after delivery, so it can be delivered to locations with severe dimensional and mass restrictions. be able to.

Next, regarding a modified example of this embodiment, the points that are different from this embodiment will be mainly described. This embodiment differs from the present embodiment in that a reinforcing member 24 is further provided inside the tank 20. The reinforcing members 24 are provided inside the tank 20 at positions A to D in FIG. 1, respectively.

FIG. 4 shows the reinforcing member 24 provided at the position indicated by C in FIG. The reinforcing member 24 is composed of two reinforcing members: an upper reinforcing member 24A provided at the connecting portion between the body plate 21A and the end plate 22C, and a lower reinforcing member 24B provided at the connecting portion between the body plate 21B and the end plate 22D. be done. The reinforcing member 24A and the reinforcing member 24B are, for example, a right triangle, and the oblique side 24C of the reinforcing member 24A and the oblique side 24D of the reinforcing member 24B, which correspond to the base of the right triangle, are processed into an arc shape when viewed from the vertical direction. ing. The reinforcing member 24 is fixed to the inside of the tank 20 by, for example, welding, and is made of, for example, mild steel. The reinforcing members 24 provided inside the tank 20 at the positions A, B, and D in FIG. 1 also have the same configuration as the reinforcing members 24 provided at the position C shown above.

By providing such a configuration, in addition to the same effects as in the first embodiment, it is possible to improve the strength against the internal pressure of the tank 20. Since the reinforcing member 24 is provided in a portion of the tank 20 that has relatively low strength, the provision of the reinforcing member 24 prevents the tank 20 from opening due to internal pressure, thereby making it possible to better maintain airtightness.

(Second embodiment)
Regarding the second embodiment, the points that are different from the first embodiment will be mainly described, and the detailed description of the points similar to the first embodiment will be omitted. The main difference between the second embodiment and the first embodiment is that the tank 30 is divided by planes parallel to the radial direction.

FIG. 5 is a side view of the gas-insulated stationary induction appliance according to the second embodiment. As shown in FIG. 5, the tank 30 has a cylindrical shape and is divided into three parts on a plane parallel to the radial direction: a radially divided tank end 30A, a radially divided tank center part 30B, and a radially divided tank end 30C. has been done. The tank 30 includes a radially divided tank end portion 30A, a radially divided tank center portion 30B, a radially divided tank end portion 30C, end plates 32A and 32B that close both ends of the tank 30, transport end plates 33A, 33B, 33C and 33D, and flanges 34A, 34B, 34C, and 34D that connect the radially divided tank end 30A, the radially divided tank center portion 30B, and the radially divided tank end 30C. The tank 30 includes a radially divided tank end 30A, a radially divided tank center portion 30B, a radially divided tank end 30C, a head plate 32A, and a head plate 32B, which are assembled in the axial direction into flanges 34A, 34B, and 34C. , and 34D.

The radially divided tank end portion 30A, the radially divided tank center portion 30B, and the radially divided tank end portion 30C each have a cylindrical shape and are arranged in combination in the axial direction. The radially divided tank end portion 30A, the radially divided tank center portion 30B, and the radially divided tank end portion 30C extend along the axial direction in which the legs 13 of the iron core 12 are lined up, and are made of, for example, mild steel.

The end plates 32A and 32B are formed into circular shapes having approximately the same diameter as the radial divided tank end portion 30A, the radial divided tank center portion 30B, and the radial divided tank end portion 30C. The end plate 32A is fixed to the radially divided tank end 30A by, for example, welding, and the end plate 32B is fixed to the radially divided tank end 30C by, for example, welding. The end plates 32A and 32B have, for example, a flat shape or a dish shape, and are made of, for example, mild steel.

The flanges 34A, 34B, 34C, and 34D are provided at connecting portions of the radially divided tank end 30A, the radially divided tank center portion 30B, and the radially divided tank end 30C, respectively. The flanges 34A, 34B, 34C, and 34D are connected by, for example, welding, bolting, riveting, tightening with clamp parts, etc., thereby forming a radially divided tank end 30A, a radially divided tank center portion 30B, and The tank 30 is formed by connecting the radially divided tank ends 30C. The flanges 34A, 34B, 34C, and 34D are connected with a strength that can withstand, for example, a tank internal pressure of 0.2 MPa abs or more.

Furthermore, when transporting the tank 30, the transport end plates 33A, 33B, 33C, and 33D are connected to the divided parts of the radially divided tank end 30A, the radially divided tank center part 30B, and the radially divided tank end 30C. Ru. The transportation mirror plates 33A, 33B, 33C, and 33D are connected to the flanges 34A, 34B, 34C, and 34D, respectively, by, for example, welding, bolting, riveting, tightening with clamp parts, or the like. The transportation mirror plates 33A, 33B, 33C, and 33D are, for example, flat or dish-shaped, and are made of, for example, mild steel. Note that the flanges 34A, 34B, 34C, and 34D are preferably connected at the installation location using a method that avoids welding, such as port fastening.

Next, the operation of this embodiment will be explained.

By having the above configuration, the gas insulated stationary induction electric appliance 1 of this embodiment can be carried in a divided state to an installation site, and after being carried in, the gas insulated stationary induction electric appliance 1 can be assembled. Specifically, for example, the stationary induction appliance body 10, the radially divided tank end portion 30A, the radially divided tank center portion 30B, and the radially divided tank end portion 30C are connected to the installation location of the gas-insulated stationary induction appliance 1. Bring it in. Before carrying in, transport end plates 33A, 33B, 33C, and 33D are attached to the flange 34A, respectively, at the divided parts of the radially divided tank end 30A, the radially divided tank center part 30B, and the radially divided tank end 30C. , 34B, 34C, and 34D.

Next, after carrying it to the installation location, the transport end plates 33A, 33B, 33C, and 33D are removed from the radially divided tank end portion 30A, the radially divided tank center portion 30B, and the radially divided tank end portion 30C. Then, the radially divided tank end 30A, the radially divided tank center part 30B, and the radially divided tank end 30C are connected to the flanges 34A, 34B, 34C, and 34D so as to house the stationary induction electric appliance main body 10 inside. Connect via. At this time, an insulating inert gas is sealed inside the tank 30 together with the stationary induction electric appliance main body 10.

As described above, according to this embodiment, the tank of the gas-insulated stationary induction electric appliance can be delivered in a divided state and assembled after delivery, so it can be delivered to locations with severe dimensional and mass restrictions. be able to.

Further, during transport, the tank end portion 30A, tank center portion 30B, and tank end portion 30C can be kept in a sealed state by the transport mirror plates 33A, 33B, 33C, and 33D.

(Third embodiment)
Regarding the third embodiment, the points that are different from the first embodiment will be mainly described, and the detailed description of the points similar to the first embodiment will be omitted. The third embodiment is mainly different from the first embodiment in that the shape of the tank 40 is, for example, a rectangular parallelepiped, and the tank 40 is divided by a plane parallel to the radial direction and a plane parallel to the axial direction.

FIG. 6 is a perspective view of a gas-insulated stationary induction appliance according to a third embodiment. As shown in FIG. 6, the tank 40 is, for example, a rectangular parallelepiped, and is formed from divided tanks 40A, 40B, 40C, and 40D. Tank 40 includes divided tanks 40A, 40B, 40C, and 40D, and flanges 41A, 41B, 41C, and 41D that connect them. Tank 40 is formed by connecting divided tanks 40A, 40B, 40C, and 40D with flanges 41A, 41B, 41C, and 41D.

Note that the tank 40 may not be a rectangular parallelepiped but may be a semi-oval or a full oval.

The divided tanks 40A, 40B, 40C, and 40D are each shaped like a rectangular parallelepiped without two sides, and are staggered so that their connecting portions 42 form a T-shape. The material is, for example, mild steel.

FIG. 7 is a diagram of the divided tank 40A. The divided tanks 40B, 40C, and 40D may have similar configurations, and the divided tank 40A will be described here as an example.

As shown in FIG. 7, the side surface 40A includes a flange 41A at the connecting portion, and is obtained by dividing the tank 40 into a plane parallel to the radial direction and a plane parallel to the axial direction. Each surface of the tank 40A and the flange 41A are connected, for example, by welding, bolting, riveting, tightening with clamp parts, or the like.

The flanges 41A, 41B, 41C, and 41D are provided at connecting portions of the divided tanks 40A, 40B, 40C, and 40D, respectively, and are made of, for example, mild steel. The flanges 41A, 41B, 41C, and 41D are connected by, for example, welding, bolting, riveting, tightening with clamp parts, etc., thereby connecting the divided tanks 40A, 40B, 40C, and 40D to form the tank 40. do. The flanges 41A, 41B, 41C, and 41D are connected with a strength that can withstand, for example, a tank internal pressure of 0.2 MPa abs or more. Note that the flanges 41A, 41B, 41C, and 41D are preferably connected at the installation location using a method that avoids welding, such as port fastening.

Next, the operation of this embodiment will be explained.

By having the above configuration, the gas insulated stationary induction electric appliance 1 of this embodiment can be carried in a divided state to an installation site, and after being carried in, the gas insulated stationary induction electric appliance 1 can be assembled. Specifically, for example, the stationary induction appliance main body 10 and the divided tanks 40A, 40B, 40C, and 40D are carried to the installation location of the gas-insulated stationary induction appliance 1.

Next, the divided tanks 40A, 40B, 40C, and 40D are connected via flanges 41A, 41B, 41C, and 41D so that the stationary induction electric appliance main body 10 is housed therein. At this time, an insulating inert gas is sealed inside the tank 40 together with the stationary induction electric appliance main body 10.

As described above, according to this embodiment, the tank of the gas-insulated stationary induction electric appliance can be delivered in a divided state and assembled after delivery, so it can be delivered to locations with severe dimensional and mass restrictions. be able to.

Furthermore, since the side and bottom surfaces of the tank can be further divided and transported, it is possible to transport the tank to locations with stricter dimensional and mass restrictions.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

DESCRIPTION OF SYMBOLS 1... Gas insulated stationary induction electric appliance, 10... Stationary induction electric appliance body, 11... Winding wire, 12... Iron core, 13... Leg, 14... Yoke, 20, 30, 40... Tank, 20A... Upper part of axially divided tank, 20B... Axial division tank lower part, 21A, 21B...Body plate, 22A, 22B, 22C, 22D, 32A, 32B...End plate, 23A, 23B, 34A, 34B, 34C, 34D, 41A, 41B, 41C, 41D...Flange, 24 , 24A, 24B... Reinforcement member, 24C, 24D... Oblique side, 30A, 30C... Radial split tank end, 30B... Radial split tank center part, 33A, 33B, 33C, 33D... End plate for transportation, 40A, 40B, 40C, 40D...Divided tank, 42...Connection part.

Claims (9)

A gas-insulated stationary induction electric appliance consisting of a winding wound around an iron core stored inside a tank filled with insulating gas,
The tank is
a plurality of axially divided tanks obtained by dividing the tank into a plurality of axially divided tanks;
A gas-insulated stationary induction electric appliance, comprising: flanges provided on each of the plurality of axially divided tanks. The gas-insulated stationary induction electric appliance according to claim 1, wherein the plurality of axially divided tanks include a body plate divided into a plurality of axially divided tanks, and an end plate that closes an end of the body plate. The gas-insulated stationary induction electric appliance according to claim 2, further comprising a reinforcing member inside the tank at a connecting portion between the body plate and the end plate. The gas-insulated stationary induction electric appliance according to claim 1, wherein the plurality of axially divided tanks are connected via the flange with a strength capable of withstanding 0.2 MPa abs or more to form the tank. A gas-insulated stationary induction electric appliance consisting of a winding wound around an iron core stored inside a tank filled with insulating gas,
The tank is
a plurality of radially divided tanks obtained by dividing the tank into a plurality of radially divided tanks;
A gas-insulated stationary induction appliance comprising: flanges provided on each of the plurality of radially divided tanks. a plurality of head plates closing an end of the tank;
The gas-insulated stationary induction electric appliance according to claim 5, further comprising a plurality of transportation end plates connected to the plurality of radially divided tanks via the flanges and respectively closing the plurality of radially divided tanks during transportation. . 6. The gas insulated stationary induction electric appliance according to claim 5, wherein the plurality of radially divided tanks are connected via the flange with a strength capable of withstanding 0.2 MPa abs or more to form the tank. A gas-insulated stationary induction electric appliance consisting of a winding wound around an iron core stored inside a tank filled with insulating gas,
The tank is
a plurality of divided tanks obtained by dividing the tank into a plurality of divisions in an axial direction and a radial direction;
A gas-insulated stationary induction appliance comprising: flanges provided on each of the plurality of divided tanks. 9. The gas-insulated stationary induction electric appliance according to claim 8, wherein the plurality of divided tanks have connecting portions connected in a T-shape.

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