JP3148650B2 - Connection device between electrical equipment containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting device for connecting containers of an electric device containing an insulating medium, for example, a tank of an oil-immersed transformer and a container of a gas insulated switchgear (hereinafter referred to as GIS). is there.

[0002]

2. Description of the Related Art In a conventional connection between containers of electric equipment, it is difficult to adjust a manufacturing error of a connection portion between the containers at the time of installation. General. An apparatus of this type is disclosed, for example, in Japanese Patent Publication No. 60-57287.
Further, in the above conventional example, the installation area is increased by the length of the bellows. Therefore, instead of inserting the conventional bellows between the containers, there is also a conventional example in which a corrugated single-bellows is formed in a part of the container to connect the containers and reduce the installation area.
An apparatus of this type is disclosed in, for example, JP-A-3-85702.

FIGS. 7 to 9 show a conventional connecting device for connecting a bellows by inserting a bellows between containers, and FIG. 7 is a cross-sectional view showing a main part of a connecting device between the oil-immersed transformer and the GIS. FIG. FIG. 8 is an explanatory diagram for explaining a method of assembling the connection device between the oil-immersed transformer and the GIS. FIG. 9 is another explanatory diagram for explaining a method of assembling a connection device between the oil-immersed transformer and the GIS.

In these figures, reference numeral 1 denotes an oil-filled transformer tank, and a cylindrical housing portion 1a is formed on a side surface of the transformer tank 1 by a cylindrical tube portion 1b having a diameter D. A flange 1c is provided on an end face of the cylindrical portion 1b. Reference numeral 2 denotes a bellows having a total length T (the free length is slightly longer) and a shrinkage distance of at least a work adjustment amount t described later, and flanges 2a and 2b are provided on both end surfaces. The flange 2a on the left side of the figure is attached to the flange 1c of the transformer tank 1 via the packing 3.

[0005] Reference numeral 4 denotes a bushing. The left side of the figure is a bushing 4a in oil and the right side is a bushing 4b in gas. The bushing 4 is provided with two intermediate flanges at the center. The left side is a flange 4c on the side of the bushing 4a in oil, and the right side is a flange 4d on the side of the bushing 4b in gas. Flange 4c
Is the right flange 2b of the bellows 2 via the packing 3.
Attached to.

[0006] Reference numeral 5 denotes a GIS case, which is formed in a right-angled L-shape as shown in the figure, and has flanges 5a and 5b provided at both end surfaces thereof, and is filled with sulfur hexafluoride gas. ing. The left flange 5 a is attached to a flange 4 d of the bushing 4 via an O-ring 6.
The other downward flange 5b is connected to the GI through the O-ring 6.
It is attached to the upward flange 7a of the S case 7. G from GIS case 7 to GIS not shown
The connection is the same as that of the IS case 5. A connection device is constituted by the flange 1c of the transformer tank 1, the bellows 2, and the flange 4c on the side of the bushing 4a in oil. The connection points of the flanges are all bolted and nut-tight.

Next, an assembling method will be described with reference to FIGS. As shown in FIG. 8, the inserted bellows 2 having a total length T is contracted until the length becomes T1, and the flange 2b is previously moved to the transformer tank 1 by the work adjustment amount t. Connect the flange 4d of the bushing 4 to the GIS via the O-ring 6.
It is connected to the flange 5a of the case 5. The GIS case 5 to which the bushing 4 is connected is lifted by the crane 8 via the wire 9, and the flange 5 b of the GIS case 5 is connected to the GI case 5.
While maintaining the gap g between the flange 7a of the S case 7, the bushing 4a in the oil is inserted into the bellows 2 so as not to hit the upper end of the flange 2b of the bellows 2, and is horizontally moved leftward in the figure as it is. I do.

[0008] Even if the flange 5b of the GIS case 5 moves horizontally just above the flange 7a of the GIS case 7, the flange 4c of the bushing 4 does not hit the flange 2b of the bellows 2 because the bellows 2 has been contracted in advance. .
Next, when the flange 5b of the GIS case 5 comes directly above the flange 7a of the GIS case 7, the GIS case 5 to which the bushing 4 is connected is suspended, and the flange 5b of the GIS case 5 is 7 is attached to the flange 7a. FIG. 9 shows this attached state. Next, as shown in FIG. 7, the contracted bellows 2 is returned to the original state, and the flange 2b of the bellows 2 and the flange 4c of the bushing 4 are connected via the packing 3, thereby completing the assembly.

[0009]

In the connecting device as described above, the flange 5b of the GIS case 5 must be connected to the GIS case so that the bellows 2 can be brought into the state shown in FIG.
Horizontal surface of the case 7 with the flange 7a and the bushing 4
Of the flange 4c and the flange 2b of the bellows 2 at the same time.

However, in the above assembling work, when the flange 5b of the GIS case 5 is suspended and attached to the flange 7a of the GIS case 7, the flange surface of the flange 5b of the GIS case 5 is slid or obliquely moved to align the center. It is not desirable to do so. The O-ring is inserted into a groove on the flange surface of the GIS case, and a part of the O-ring extends from the flange surface for sealing between the flanges. Therefore, if the two flange surfaces to be connected, for example, the flanges 5b and 7a are slid or moved obliquely, the O-ring will be damaged. In order to ensure the sealing performance without damaging the O-ring, it is necessary to allow a dimension relief by the work adjustment amount t in either the horizontal or vertical axis direction.

A bellows is used as a device for ensuring the work adjustment amount t as a dimension relief. As shown in FIG. 8, normally, the work adjustment amount t is inserted between the flange 1 c of the transformer tank 1 and the flange 4 c of the bushing 4 and attached to the flange 1 c of the transformer tank 1 to secure the work adjustment amount t by expansion and contraction. It is common to connect them. FIG.
The flange 4 of the bushing 4 lifted as shown in FIG.
In order that c and the flange 2b of the bellows 2 do not collide during the assembling operation, the bellows 2 must be contracted by a minimum dimension t. Increasing the work adjustment dimension t facilitates the work but increases the price. Therefore, the work adjustment dimension t is determined in consideration of work requirements and the price of the bellows 2.

The work adjustment amount t during normal assembly work is required to be 5 mm. For example, when a bellows having a diameter of 1400 mm is used, the total length T of the bellows needs to be 300 mm or more. If the total length T of the bellows is to be reduced, the bellows bellows must be made thinner and cannot withstand the internal pressure. Therefore, as shown in FIG.
In order to attach the bellows 2 which secures the work adjustment amount t, a minimum dimension corresponding to the total length T is required at a minimum, and the horizontal dimension of the entire device becomes long.

When the flange 4c of the bushing 4 moves horizontally during the assembling operation, the flange 2b of the bellows 2 is on the axis of the flange 4c, so that the horizontal movement of the flange 4c is hindered and the GIS case 5 is moved horizontally. There is also a problem that it cannot be freely moved in the direction and the workability of assembly is poor.

The present invention has been made in order to solve the above-mentioned problems, and can be assembled without a bellows for securing a work adjustment amount necessary for preventing damage to a seal member. An object of the present invention is to obtain a connection device between electrical equipment containers that can be reduced in size. It is still another object of the present invention to provide a connecting device between electrical equipment containers that can easily cope with various external dimensions of the flange of the second container and can withstand high internal pressure. Furthermore, the second flange is free to move in its axial direction,
It is an object of the present invention to obtain a connection device between electrical equipment containers that can improve the workability of assembly.

[0015]

Means for Solving the Problems In order to achieve the above object, a connecting device between electric equipment containers according to the present invention comprises:
A first connection assisting device connected to the first container, the first connection assisting device having a housing portion forming member forming a housing portion having an opening, and a first flange provided at an end of the opening, and a first flange; A second connection aid having an outer dimension smaller than the inner dimension of the second flange, and an outer dimension larger than the inner dimension of the first flange and an inner dimension smaller than the outer dimension of the second flange. And a connection auxiliary member connected to the second container, and a connection device between the electric device containers,
The second flange is accommodated in the accommodating portion of the first connection auxiliary device, and the connection auxiliary member is provided on one surface of each of the first flange and the second flange so that the insulating medium does not leak through the seal member. It is intended to be connected.

A second connection assisting device is provided at the cylindrical member and at one end of the cylindrical member, and an outer dimension is smaller than an inner dimension of the connection assisting member and larger than an outer dimension of the cylindrical member. An auxiliary connection member having a third flange, wherein the second flange is provided at the other end of the tubular member, and the third flange is insulated to the second container via a seal member. The connection is made so that the medium does not leak.

Further, the second container is an L-shaped cylindrical container bent at a right angle and provided with a bushing having an intermediate flange, and the third flange of the auxiliary connecting member is sealed with the intermediate flange. The connection is made such that the insulating medium does not leak through the members.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 3 show a connection device according to an embodiment of the present invention, and FIG. 1 is a sectional view showing a main part of the connection device. FIG. 2 is an explanatory diagram for explaining a method of assembling the connection device. FIG. 3 is an enlarged view showing a main part of the connection device in an enlarged manner.

In these figures, reference numeral 1 denotes an oil-filled transformer tank as a first container made of a steel plate as in the prior art, and a cylinder having a cylindrical housing portion 10 formed on a side surface of the transformer tank 1. A shape part 10a and a transformer side flange 10b are provided. The first connection auxiliary device according to the present invention is constituted by the cylindrical portion 10a as the housing portion forming member and the transformer side flange 10b as the first flange. The cylindrical portion 10a has an inner diameter DA larger than the diameter D of the conventional cylindrical portion 1b. Transformer side flange 10b is cylindrical part 10a
Is provided on the end surface of The inner diameter of the transformer-side flange 10b is DA, and the outer diameter is DB. Reference numeral 20 denotes a tubular adapter as a second connection auxiliary device having a total length L made of a steel plate similar to the conventional GIS case 5. The cylindrical adapter 20 has an outer diameter DC on the right end face, a right flange 20a as a third flange of the present invention, and an inner diameter DA on the left end face of the cylindrical portion 10a.
It has a left-side flange 20b as a second flange having an outer diameter DD smaller than that of the second flange, and a tubular portion 20c as a tubular member.

Reference numeral 21 denotes a disk-shaped adapter as a connection auxiliary member having a rectangular cross section made of a steel plate similar to the conventional GIS case 5 and having an annular shape. The disk adapter 21 has an inner diameter D
E is the outer diameter DC of the right flange 20a of the tubular adapter 20
It is larger than the outer diameter DD of the left flange 20b of the tubular adapter 20, and its outer diameter DB is equal to the transformer side flange 1
0b is the same as the outer diameter of the outer peripheral portion. Reference numeral 22 denotes a packing as a sealing member inserted between the left flange 20b of the tubular adapter 20 and the disc-shaped adapter 21. 23
Is a packing which is inserted between the transformer-side flange 10b and the disk-shaped adapter 21 as a sealing member.

Reference numeral 4 denotes a bushing. The left side of the figure is a bushing 4a in oil and the right side is a bushing 4b in gas. The bushing 4 is provided with two intermediate flanges at the center. The left side is a flange 4c on the side of the bushing 4a in oil, and the right side is a flange 4d on the side of the bushing 4b in gas. Flange 4c
Is attached to the right flange 20a of the tubular adapter 20 via the packing 3.

5 is a GI of a cylindrical container as the second container.
As shown in the figure, the S case has an L-shape that is bent at right angles, and flanges 5a and 5b are provided on both end surfaces. The left flange 5 a is attached to a flange 4 d of the bushing 4 via an O-ring 6. The other downward flange 5b is attached to the upward flange 7a of the GIS case 7 via an O-ring 6. G
The connection between the IS case 7 and the GIS (not shown) is the same as that of the GIS case 5.

In this embodiment, a cylindrical portion 10a and a transformer-side flange 10 constituting a first connection auxiliary device are provided.
b, the connection device 100 is composed of a tubular adapter 20 as a second connection auxiliary device and a disk adapter 21 as a connection auxiliary member. Although the connection point of each flange is not shown in detail, it is a fastening structure using bolts and nuts. Left flange 20 of tubular adapter 20
As shown in FIG. 3, the connection point between b and the disc-shaped adapter 21 is oil-stopped by using a bolt hole in the left flange 20 b of the tubular adapter 20 as a set screw 20 d.

Next, an assembling method will be described. As shown in FIG. 2, the flange 5a of the GIS case 5 and the flange 4d of the bushing 4 are connected via an O-ring 6. Next, the right side flange 20a of the cylindrical adapter 20 is
Through the packing 3 to the flange 4c. At this time, the disk adapter 21 is inserted in advance so as to be positioned on the right side of the left flange 20b of the tubular adapter 20 in the drawing as shown in FIG. In this state, it is lifted by the crane 8 via the wire 9.

While maintaining the gap g between the flange 5b of the GIS case 5 and the flange 7a of the GIS case 7, the suspended GIS case 5 and the bushing 4a in oil integrated with the cylindrical adapter 20 are connected to the cylindrical portion. 10a, and is horizontally moved as it is to the left in the figure to a predetermined position. Outer diameter DD of left flange 20b of tubular adapter 20
Is smaller than the inner diameter DA of the cylindrical portion 10a by a predetermined dimension 2δ. 2δ = (DA−DD), which is a value having a sufficient margin for the interval δ. Therefore, the left flange 20b of the tubular adapter 20 has a margin of a predetermined dimension 2δ in the tubular portion 10a, so that the left flange 20b of the tubular adapter 20 does not interfere with the upper end portion of the transformer-side flange 10b, and the gap g is reduced. The horizontal movement can be easily made to a predetermined position in the tubular portion 10a while securing.

When the flange 5b of the GIS case 5 comes directly above the flange 7a of the GIS case 7,
The flange 5b of the IS case 5 is attached to the flange 7a of the GIS case 7 via the O-ring 6. Next, the disk-shaped adapter 21 inserted into the cylindrical adapter 20 is lifted, and the packing 2 is mounted on the transformer side flange 10b via the packing 22 on the left flange 20b of the cylindrical adapter 20.
3 for each. The assembly is completed as described above.
State.

In this connection device, the cylindrical adapter 2
The left flange 20b of the tubular adapter 20 integrated with the suspended GIS case 5 and the bushing 4 because the left flange 20b of the cylindrical adapter 10 can move inside the tubular portion 10a.
b can be moved horizontally to a predetermined position in the tubular portion 10a without being interfered by the transformer-side flange 10b. Thus, instead of connecting the transformer side flange 10b and the left side flange 20b of the tubular adapter via a sealing member, the same side surface of the transformer side flange 10b and the left side flange 20b of the tubular adapter is used. Disc adapter 2
1 are connected via seal members. Therefore, there is no need for a work adjustment amount as a dimension relief required to prevent damage to the seal member. Therefore, assembling can be easily performed without using the bellows 2 (see FIG. 7) for securing the work adjustment amount.

Further, when the bellows 2 is used, a minimum length required for expansion and contraction, for example, a bellows having a diameter of 1400 mm and a length of 300 mm or more is required. However, since no bellows is required, the length of the bellows can be reduced by 300 mm. That is, if the total length L of the tubular adapter 20 is, for example, 1
50 mm is enough. That is, the cylindrical adapter 20
And the length when the conventional bellows 2 are combined (15
(0 + 300) = 450 mm, so that the length can be reduced to 1/3, so that the horizontal dimension of the entire device can be shortened. Also, the flange 4c of the bushing 4
Even if the outer diameter of the cylindrical adapter 20 varies, the outer diameter DC of the right side flange 20a of the cylindrical adapter 20 can be adjusted to the outer diameter of the flange 4c of the bushing 4 so that the cylindrical adapter 20
Can be connected to the bushing 4, so that any bushing having a different outer diameter of the intermediate flange can be accommodated.

Further, since the tubular adapter 20 is made of a plate material without bellows like the bellows 2, the plate thickness can be increased. Thereby, for example, in addition to being able to withstand high internal pressure even when the oil-immersed transformer 1 is an explosion-proof type or the like, it can be made less expensive than the bellows 2. Furthermore, since the tubular adapter 20 is made of a plate material, it is easier to handle than the bellows 2 having the bellows, and does not need to be expanded and contracted at the time of mounting like a bellows. Thereby, the workability of assembly can be improved.

Further, since the GIS case 5 has an L-shape, the GIS case 7 to be connected is located below the GIS case 5 at a distance g. For this reason, the GIS
When the case 5 moves horizontally, the case 5 can freely move horizontally into the cylindrical portion 10a toward the transformer tank 1 and also obstructs on the horizontal movement line in the opposite direction, that is, the connected G
Since the IS case 7 and the like do not obstruct, it can be freely moved in the horizontal direction, and the workability of assembly can be improved.

In this embodiment, annular flanges are used for the left flange 20b and the transformer-side flange 10b of the tubular adapter 20, but the present invention is not limited to the annular shape, and may be, for example, a rectangular flange. Further, the bolt hole of the left side flange 20b of the cylindrical adapter 20 is set as the set screw 20c.
The bolt hole b is not limited to the set screw 20c. For example, the thickness of the left side flange 20b of the tubular adapter 20 may be reduced, and a seat having the set screw may be welded to the bolt hole. Thus, the weight of the tubular adapter 20 can be reduced, and the cost can be further reduced. Further, the case where the GIS case 5 has an L-shape bent at a right angle has been described, but the GIS case 5 is not limited to the L-shape, and may have any angle, for example, a linear shape. In addition, the example of the connection device between the container between the oil-immersed transformer and the gas-insulated switchgear has been described. However, the connection device between the container between the gas-insulated transformer and the gas-insulated switchgear, and between the gas-insulated switchgear devices. The same effect can be obtained with the connection device between containers accommodating the insulating medium.

Embodiment 2 FIG. 4 to 6 show a connection device according to another embodiment of the present invention, and FIG. 4 is a sectional view showing a main part of the connection device. FIG. 5 is an explanatory diagram for explaining a method of assembling the connection device. FIG. 6 is an enlarged view showing a main part of the connection device in an enlarged manner.

In these figures, reference numeral 1 denotes a transformer tank made of steel plate as in the prior art, and a side wall of the transformer tank 1 is provided with a cylindrical portion 10a forming a cylindrical housing portion 10. The cylindrical portion 10a has an inner diameter DA larger than the diameter D (FIG. 2) of the conventional cylindrical portion 1b. A transformer-side flange 10b is provided on an end face of the cylindrical portion 10a. The inner diameter of the transformer-side flange 10b is DA, and the outer diameter is DB.
Numeral 40 denotes a bushing, in which two intermediate flanges are provided at the center, a flange 40c having an outer diameter DD smaller than the inner diameter DA of the cylindrical portion 10a on the left side, and a flange 40d having an outer diameter DC smaller than the outer diameter DD on the right side. Have.

Reference numeral 21 denotes a circular disk-shaped adapter made of a steel plate similar to the conventional GIS case 5 and having a rectangular cross section.
The disk-shaped adapter 21 has an inner diameter DE larger than the outer diameter DC of the flange 40d of the bushing 40 and smaller than the outer diameter DD of the flange 40c of the bushing 40, and the outer diameter DB is equal to the outer diameter of the outer peripheral portion of the transformer-side flange 10b. Is the same.
Reference numeral 22 denotes a packing inserted between the flange 40c of the bushing 40 and the disk-shaped adapter 21. 23 is a packing inserted between the transformer-side flange 10b and the disk-shaped adapter 21.

The flange 40c of the bushing 40 is connected to the disk adapter 21 via the packing 22.
The transformer-side flange 10b is connected to the disk-shaped adapter 21 via a packing 23. 5 is GI of cylindrical container
As shown in the figure, the S case has an L-shape that is bent at right angles, and flanges 5a and 5b are provided on both end surfaces. The left flange 5 a is attached to the flange 40 d of the bushing 40 via the O-ring 6. The other downward flange 5b is connected to the GIS via the O-ring 6.
The case 7 is attached to an upward flange 7 a. G from GIS case 7 to GIS not shown
The connection is the same as that of the IS case 5.

In this embodiment, the cylindrical portion 10a and the transformer-side flange 10 constituting the first connection auxiliary device are formed.
b, Flange 40c of bushing 40 as second connection auxiliary device, disk adapter 21 as connection auxiliary member
Constitutes the connection device 200. Although the connection point of each flange is not shown in detail, it is a fastening structure using bolts and nuts. The connection between the flange 40c of the bushing 40 and the disk-shaped adapter 21 is shown in FIG.
As shown in the figure, the bolt hole of the flange 40c of the bushing 40 is set to a set screw 40e to stop the oil.

Next, an assembling method will be described. As shown in FIG. 5, the flange 5a of the GIS case 5 and the flange 40d of the bushing 40 are connected via the O-ring 6.
At this time, the disk-shaped adapter 21 is inserted in advance so as to be located on the right side of the flange 40c of the bushing 40 as shown in FIG. In this state, it is lifted by the crane 8 via the wire 9.

While maintaining a gap g between the flange 5b of the GIS case 5 and the flange 7a of the GIS case 7, the suspended bushing 40a integrated with the GIS case 5 is put into the cylindrical portion 10a. Is horizontally moved to a predetermined position in the left direction of the figure. The outer diameter DD of the flange 40c of the bushing 40 is smaller than the inner diameter DA of the cylindrical portion 10a by a predetermined dimension 2δ. 2δ = (DA
-DD). Therefore, the flange 40 of the bushing 40
c has a margin of a predetermined dimension 2δ in the cylindrical portion 10a, so that the flange 40c of the bushing 40 does not interfere with the upper end portion of the transformer-side flange 10b and easily secures the gap g while maintaining the interval g. Can be moved horizontally to a predetermined position.

When the flange 5b of the GIS case 5 comes directly above the flange 7a of the GIS case 7,
The flange 5b of the IS case 5 is attached to the flange 7a of the GIS case 7 via the O-ring 6. Next, the disk-shaped adapter 21 inserted into the bushing 40 is lifted and attached to the flange 40c of the bushing 40 via the packing 22 and to the transformer side flange 10b via the packing 23, respectively. Thus, the assembly is completed, and the state shown in FIG. 4 is obtained.

In this connection device, the cylindrical adapter 2
0 to the flange 4 of the bushing 40.
By replacing with 0c, the bushing 40 can also make the cylindrical adapter 20 unnecessary. Thereby, the horizontal dimension of the entire device can be further reduced.

Further, since the bushing 40 does not have the bellows 2 or the tubular adapter 20, it is easy to handle and the number of working steps can be reduced. As a result, the workability of assembly can be improved and the cost can be reduced. The flange 40c of the bushing 40
Is directly connected to the transformer-side flange 10b by the disc-shaped adapter 21, so that the connection device 200 is shortened by an amount corresponding to the cylindrical portion 20c in FIG. Further, for example, even when the transformer tank 1 is an explosion-proof type or the like, it can withstand high internal pressure.

[0042]

Since the present invention is configured as described above, it has the following effects. A first connection assisting device connected to the first container, the first connection assisting device having a housing portion forming member forming a housing portion having an opening, and a first flange provided at an end of the opening, and a first flange; A second connection assisting device having a second flange having an outer dimension smaller than the inner dimension of the second flange and being connected to the second container; and an outer dimension larger than the inner dimension of the first flange and the second flange. A connection auxiliary member having an inner dimension smaller than the outer dimension is provided, the second flange is housed in a housing portion of the first connection auxiliary device, and the connection auxiliary member is connected to one of the first flange and the second flange. By connecting the insulating medium to the surfaces via the sealing members so that the insulating medium does not leak, the second
The second flange can be prevented from interfering with the first flange because the second flange can move in the accommodation portion. This makes the first
Of the first flange and the second flange are connected via the seal member by the connection auxiliary member, instead of the flanges and the second flange facing each other and being connected via the seal member. Is done. Accordingly, there is no need for a work adjustment amount necessary for preventing damage to the seal member. Therefore, assembling can be performed without a bellows for ensuring a work adjustment amount. As a result, there is no need for a margin for adjustment for avoiding damage to the sealing member, and the overall size of the device can be reduced.

Also, the second connection auxiliary device has an auxiliary connection member having a cylindrical member and a third flange provided at one end of the cylindrical member, and the second flange is a cylindrical member. And the third flange is connected to the second container via a sealing member so that the insulating medium does not leak. Since the connection can be made by adjusting the size to the outside dimension of the flange of the second container, it is possible to easily cope with the case where the flange of the second container has various outside dimensions. In addition, because it does not have an elastic part like bellows,
Can withstand high internal pressure.

Further, the second container is an L-shaped cylindrical container bent at a right angle, provided with a bushing having an intermediate flange, and the third flange of the auxiliary connection member is sealed with the intermediate flange. Since the connection is made so that the insulating medium does not leak through the member, there is no obstacle on the axial line of the second flange, so the second flange can move freely in the axial direction. The workability of assembly can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a connection device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining a method of assembling the connection device of FIG. 1;

FIG. 3 is an enlarged view showing a main part of the connection device of FIG. 1 in an enlarged manner.

FIG. 4 is a sectional view showing a main part of a connection device according to another embodiment of the present invention.

FIG. 5 is an explanatory diagram for explaining a method of assembling the connection device of FIG. 4;

FIG. 6 is an enlarged view showing a main part of the connection device of FIG. 4 in an enlarged manner.

FIG. 7 is a cross-sectional view showing a main part of a conventional connection device between a container between an oil-immersed transformer and a GIS.

FIG. 8 is an explanatory diagram for explaining a conventional method of assembling a connection device between a container between an oil-immersed transformer and a GIS.

9 is another explanatory view for explaining a method for assembling the conventional connection device between containers in FIG. 9;

[Explanation of symbols]

1: transformer tank, 3: packing, 4: bushing, 4
c: flange, 5: GIS case, 10: accommodation part, 10
a: cylindrical part, 10b: transformer side flange, 20: cylindrical adapter, 20a: right side flange, 20b: left side flange, 20c: cylindrical part, 21: disk adapter, 22,2
3: packing, 40: bushing, 40c: flange,
100, 200: connection device.

Claims (3)

(57) [Claims] A first container provided in the first container in which the insulating medium is stored, wherein the first member is provided at an end of the opening; A first connection auxiliary device having a flange, connected to a second container containing an insulating medium, and having an outer dimension smaller than an inner dimension of the first flange of the first connection auxiliary device; A second connection auxiliary device having a second flange, and a first connection auxiliary device of the first connection auxiliary device.
The outer dimension larger than the inner dimension of the flange of the second
A connection auxiliary member having an inner dimension smaller than an outer dimension of a second flange of the connection auxiliary device, wherein the second flange of the second connection auxiliary device is The first connection assisting device is accommodated in the accommodating portion of the first connection assisting device, and the connection assisting member is connected to the first flange of the first connection assisting device and the second connection assisting device.
A connection device between electrical equipment containers connected to one surface of each of the second flanges of the connection auxiliary device through a seal member so that the insulating medium does not leak. 2. The connection assisting device according to claim 1, wherein the second connection assisting device is provided at a linear tubular member at one end of the tubular member and has an outer dimension smaller than an inner dimension of the connection assisting member. An auxiliary connection member having a third flange larger than an outer dimension of the cylindrical member; a second flange provided at the other end of the cylindrical member; The connection device between electrical equipment containers according to claim 1, wherein the connection device is connected to the second container via a sealing member so that the insulating medium does not leak. 3. The second container is an L-shaped cylindrical container bent at a right angle, provided with a bushing having an intermediate flange, wherein the third flange of the auxiliary connection member is connected to the intermediate container. 3. The connection device between electrical equipment containers according to claim 2, wherein the connection device is connected to the flange via a sealing member so that the insulating medium does not leak.