Gas insulating apparatus

Abstract

To enable easy maintenance of an inner container.SOLUTION: A gas insulating apparatus (100) comprises: spacers (3) which are sandwiched by flanges (22) of outer containers (2) and flanges (12) of an inner container (1) so as to isolate the inside of each of the outer containers from the inside of the inner container; and first adapters (4) which are disposed between the spacers and the flanges of the inner container so as to be sandwiched by the flanges of each of the outer containers and the flanges of the inner container. Both ends of a first conductor (5) disposed inside the inner container are located further on the center side of the inner container than a contact surface of the flanges of the inner container. Each of the first adapters has such a thickness that the contact surface (42) on the inner container side is located further on the inner container side than a most protruding part (34) on the inner container side of each of the spacers when the inner container is connected between the pair of outer containers.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to gas-insulated equipment. [Background technology]

[0002] Gas insulated systems such as GIS (Gas Insulated Switchgear) are composed of multiple connected containers filled with insulating gas. In some gas insulated systems, a container containing a connecting member is connected between a pair of containers containing line conductors, thereby electrically connecting the line conductors of the pair of containers. Such an inner container for connection may need to be removed during operation for maintenance or other reasons.

[0003] Patent Document 1 discloses a technology in which an expandable bellows compression device is used as an inner container. In the conventional technology of Patent Document 1, the bellows are compressed to expose a connecting member housed inside the bellows, making it possible to remove the connecting member and also to remove the bellows compression device as the inner container from between a pair of containers. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-350316 Summary of the Invention [Problem to be solved by the invention]

[0005] However, applying a bellows mechanism to the inner vessel increases costs and raises concerns about durability. One aspect of the present invention aims to provide a gas insulated device that allows easy maintenance of the inner vessel without using a bellows mechanism that has such concerns. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, a gas insulated apparatus according to one aspect of the present invention includes a pair of outer containers, each having a second conductor arranged therein, and an inner container sandwiched between the pair of outer containers and having a first conductor arranged therein, the pair of outer containers and the inner containers being arranged side by side in a first direction, and the inner containers being flange-connected to each of the outer containers, the gas insulated apparatus including: spacers sandwiched between the flanges of each of the outer containers and the flanges of the inner container, each separating the interior of each of the outer containers from the interior of the inner container, the spacers having insulating parts and spacer conductors penetrating the insulating parts, and having convex parts on a surface on a side of the inner container; and spacers provided between each of the spacers and the flange of the inner container, and a first adapter having an opening, the first adapter being an adapter arranged in a manner such that the first conductor is sandwiched between the flange of each of the outer containers and the flange of the inner container, wherein both ends of the first conductor are located closer to the center of the inner container than the contact surface of the flange of the inner container in the first direction, each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers, and each of the spacer conductors is electrically connected to the first conductor via a connecting conductor through the opening of each of the first adapters, and each of the first adapters has a thickness such that when the inner container is connected between the pair of outer containers, the contact surface on the inner container side is located closer to the inner container in the first direction than the most protruding part of the convex portion of each of the spacer.

[0007] According to another aspect of the present invention, there is provided a gas insulated apparatus comprising a pair of outer containers, each having a second conductor disposed therein, and an inner container sandwiched between the pair of outer containers and having a first conductor disposed therein, the pair of outer containers and the inner containers being arranged side by side in a first direction, and the inner containers being flange-connected to each of the outer containers, the gas insulated apparatus comprising: spacers sandwiched between the flanges of each of the outer containers and the flanges of the inner container, isolating an interior of each of the outer containers from an interior of the inner container, the spacers having an insulating portion and a spacer conductor penetrating the insulating portion, and having a convex portion provided on a surface opposite to the inner container; and spacers disposed between each of the spacers and the flanges of each of the outer containers, and separating the interior of each of the outer containers from the interior of the inner container. and a second adapter having an opening, the second adapter being an adapter sandwiched between the flange of the inner container and the flange of the outer container, wherein an end of each of the second conductors facing the inner container is located on a side farther from the inner container in the first direction than a contact surface of the flange of each of the outer containers, each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers via a connecting conductor through the opening of each of the second adapters, and each of the spacer conductors is electrically connected to the first conductor, and each of the second adapters has a thickness such that, when the inner container is connected between the pair of outer containers, the contact surface facing the outer container is located on a side farther from the inner container in the first direction than the most protruding portion of each of the convex portions of each of the spacers. [Effects of the Invention]

[0008] According to one aspect of the present invention, it is possible to provide a gas insulated device that allows easy maintenance of the inner vessel without using a bellows mechanism that has problems in terms of cost and durability. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing a schematic configuration of a gas insulated device according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional end view showing a main part of the gas insulated device. [Figure 3]FIG. 3 is a view showing a first adapter of the gas insulated device. [Figure 4] FIG. 10 is a diagram illustrating another example of the configuration of the first adapter. [Figure 5] FIG. 2 is a front view showing the gas insulated equipment with an inner container removed from a pair of outer containers. [Figure 6] FIG. 2 is a cross-sectional end view showing the gas insulated equipment with an inner container removed from a pair of outer containers. [Figure 7] FIG. 4 is a diagram showing a schematic configuration of a gas insulated device according to a second embodiment of the present disclosure. [Figure 8] FIG. 2 is a cross-sectional end view showing a main part of the gas insulated device. [Figure 9] FIG. 2 is a front view showing the gas insulated equipment with an inner container removed from a pair of outer containers. [Figure 10] FIG. 10 is a diagram showing a schematic configuration of a gas insulated device according to a third embodiment of the present disclosure. [Figure 11] FIG. 3 is a front view showing the gas insulated device with a spacer, a first adaptor, and a second adaptor removed. [Figure 12] 10A and 10B are diagrams showing modified examples of the first adaptor and the second adaptor. [Figure 13] 10A and 10B are schematic diagrams for explaining examples of use of the adapter of the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] [Embodiment 1] A first embodiment of the present invention will be described in detail below. However, the following description is merely an example of gas insulated apparatus 100 according to the present invention, and the technical scope of the present invention is not limited to the following description and the contents of the drawings.

[0011] <Outline of Gas Insulated Equipment 100> A gas insulated apparatus 100 according to a first embodiment of the present disclosure is an apparatus that can be applied to a gas insulated system such as a GIS (Gas Insulated Switchgear), etc. The gas insulated apparatus 100 includes, as its main components, an inner container 1 and a pair of outer containers 2, and is configured so that power lines communicate between these containers.

[0012] In the following, an example will be described in which the inner vessel 1 is a device (so-called bus vessel) that houses a power line passing from one outer vessel 2 to the other outer vessel 2. However, the inner vessel 1 may also be configured to have the functions of a switch, a disconnecting switch, an instrument transformer, a lightning arrester, a voltage detection device, or the like. The same applies to the outer vessel 2.

[0013] Fig. 1 is a diagram showing a schematic configuration of a gas insulated apparatus 100 according to a first embodiment of the present disclosure. Reference numeral 1001 in Fig. 1 is a plan view of the gas insulated apparatus 100, and reference numeral 1002 in Fig. 1 is a front view of the gas insulated apparatus 100. The gas insulated apparatus 100 is configured such that an inner container 1 is sandwiched between a pair of outer containers 2A and 2B, the pair of outer containers 2A and 2B and the inner container 1 are arranged side by side in a first direction D1, and the inner container 1 and each of the outer containers 2A and 2B are flange-connected.

[0014] In the following description, the first direction D1, in which the inner container 1 and the pair of outer containers 2 are aligned in the gas insulated apparatus 100, is defined as the X-axis direction. The Y-axis direction and the Z-axis direction are perpendicular to the X-axis direction and are mutually orthogonal. The inner container 1 and the pair of outer containers 2A, 2B are each filled with an insulating gas such as SF6.

[0015] In each embodiment, a case will be described in which the gas insulated equipment according to each embodiment is installed with the X-axis direction (first direction D1) on a horizontal plane, the Z-axis direction as the vertical direction, and the positive side of the Z-axis direction facing upward. However, the installation direction of the gas insulated equipment according to each embodiment is not necessarily limited to this example.

[0016] In the prior art, an expandable bellows compressor has been used as an inner vessel sandwiched between a pair of outer vessels, and by applying such an expandable bellows compressor to the inner vessel, it has become possible to remove the inner vessel without removing or attaching the outer vessel in a gas insulation system.

[0017] However, in the conventional technology, when removing the inner container during maintenance work, the bellows mechanism must be compressed, which makes the work less efficient. Inner containers using a bellows mechanism also have the problem of being expensive. Furthermore, inner containers using a bellows mechanism have concerns about their durability, which in turn raises concerns about maintaining their airtightness.

[0018] Furthermore, because it is difficult to manufacture an airtight bellows mechanism whose overall shape is anything other than cylindrical, there is also the problem that when a bellows mechanism is applied, the shape of the inner container is limited to a cylindrical shape. The gas insulated apparatus 100 according to the first embodiment is ingeniously designed so that the inner container 1 can be easily removed from the pair of outer containers 2 without applying a bellows compression device that has these problems to the inner container 1. The gas insulated apparatus 100 according to the first embodiment solves these problems.

[0019] <Inner container 1, outer container 2> Furthermore, the detailed configuration of the gas insulated apparatus 100 will be described with reference to Fig. 2. Fig. 2 is a cross-sectional end view showing the main parts of the gas insulated apparatus 100 when cut along the XY plane. More specifically, in the gas insulated apparatus 100, the outer container 2A, the inner container 1, and the outer container 2B are arranged side by side in this order toward the positive side of the X axis in a first direction D1 (X-axis direction).

[0020] The outer container 2A and outer container 2B are collectively referred to as the outer container 2. The inner container 1 is an airtight container made of metal, and has three-phase first conductors 5 arranged inside. The first conductors 5 are appropriately held in the housing of the inner container 1. The airtight housing of the inner container 1 does not use any moving parts such as a bellows mechanism.

[0021] The outer container 2A is a metal airtight container, and three-phase second conductors 6A are arranged therein. The second conductors 6A are appropriately held in the housing of the outer container 2A. The outer container 2B is a metal airtight container, and three-phase second conductors 6B are arranged therein. The second conductors 6B are appropriately held in the housing of the outer container 2B. The second conductors 6A and 6B are collectively referred to as second conductors 6. The first conductor 5 and the second conductor 6 each constitute a part of the above-mentioned power line in the gas insulated equipment 100.

[0022] A flange 12A of the inner container 1 is provided at the end of the inner container 1 on the negative side in the X-axis direction, and a flange 12B of the inner container 1 is provided at the end of the inner container 1 on the positive side in the X-axis direction. The flanges 12A and 12B of the inner container 1 are collectively referred to as the flanges 12 of the inner container 1. The contact surface of the flange 12A of the inner container 1 is a surface perpendicular to the X-axis, and the contact surface of the flange 12B of the inner container 1 is a surface perpendicular to the X-axis. In embodiment 1, each flange 12 is a circular flange, but it may be a flange of another shape, such as an oval or rounded rectangle.

[0023] A flange 22A of the outer container 2A is provided at the end of the outer container 2A on the positive side in the X-axis direction. A flange 22B of the outer container 2B is provided at the end of the outer container 2B on the negative side in the X-axis direction. The flange 22A of the outer container 2A and the flange 22B of the outer container 2B are collectively referred to as the flange 22 of the outer container 2.

[0024] The flange connection between the outer container 2A and the inner container 1 is realized by the flange 22A of the outer container 2A and the flange 12A of the inner container 1. The contact surface of the flange 22A of the outer container 2A is a surface perpendicular to the first direction D1 (X-axis). The flange connection between the outer container 2B and the inner container 1 is realized by the flange 22B of the outer container 2B and the flange 12B of the inner container 1. The contact surface of the flange 22B of the outer container 2B is a surface perpendicular to the first direction D1 (X-axis).

[0025] A spacer 3A and a first adapter 4A are inserted in the flange connection between the outer container 2A and the inner container 1, in that order, from the outer container 2A to the inner container 1 (toward the positive side in the X-axis direction). A spacer 3B and a first adapter 4B are inserted in the flange connection between the outer container 2B and the inner container 1, in that order, from the outer container 2B to the inner container 1 (toward the negative side in the X-axis direction). Note that the spacer 3A and the spacer 3B are collectively referred to as spacer 3. The first adapter 4A and the first adapter 4B are collectively referred to as first adapter 4.

[0026] The first adapter 4 and spacer 3 are sandwiched between the flange 22 of the outer container 2 and the flange 12 of the inner container 1 so that the spacer 3 contacts the contact surface of the flange 22 of the outer container 2 and the first adapter 4 contacts the contact surface of the flange 12 of the inner container 1. Furthermore, with the spacer 3 and the first adapter 4 in contact, the first adapter 4 and spacer 3 are sandwiched between the flange 22 of the outer container 2 and the flange 12 of the inner container 1. In other words, each first adapter 4 is disposed between each spacer 3 and each flange 12 of the inner container 1.

[0027] 1, the outer container 2 is further provided with an external connection flange 23 for connecting the gas insulated equipment 100 consisting of the inner container 1 and the outer container 2 to other equipment. In the example shown in Fig. 1, the connection surface of the external connection flange 23 is a surface parallel to the first direction D1 (X-axis), but this is not limited to this example.

[0028] The inner container 1 is also provided with a handhole 13. The handhole 13 is composed of a handhole opened in the housing of the inner container 1 to allow an operator to access the inside of the container during maintenance, and a sealing plate that airtightly closes the handhole. A similar handhole may also be provided in the outer container 2.

[0029] <Spacers, connecting conductors> Hereinafter, when the symbol for the spacer portion and the connecting conductor has an "A" at the end, it indicates the portion of the spacer 3A or the connecting conductor connected to the spacer 3A; when the symbol has a "B" it indicates the spacer 3B or the connecting conductor connected to the spacer 3B; when neither "A" nor "B" is added, it indicates a general term for these.

[0030] The spacer 3 is a generally plate-shaped member that separates the interior of the outer container 2 from the interior of the inner container 1 when sandwiched between the flange 22 of the outer container 2 and the flange 12 of the inner container 1 as described above. The spacer 3 is made up of an insulating portion 31 and a spacer conductor 33, and the portion that comes into close contact with the contact surface of the flange 22 of the outer container 2 is made up of the insulating portion 31. The spacer conductor 33 forms part of the above-mentioned power line, and three phases of the spacer conductor are arranged in the spacer 3 so as to penetrate the insulating portion 31.

[0031] The spacer conductor 33 is electrically connected to the first conductor 5 of the inner container 1 on the side of the inner container 1. More specifically, the spacer conductor 33 is connected to the first conductor 5 via the connection conductors 7 (7A, 7B) by a known method such as bolting or screwing. In this case, appropriate fasteners may be used in combination to connect the spacer conductor 33 to the connection conductors 7 (7A, 7B) and to connect the connection conductors 7 (7A, 7B) to the first conductor 5.

[0032] Furthermore, the spacer conductor 33 is electrically connected to the second conductor 6 of the outer container 2 on the outer container 2 side. More specifically, the spacer conductor 33 is physically connected to the second conductor 6 by a known method such as bolting or screwing. In this case, an appropriate fastener may be used in combination to connect the spacer conductor 33 and the second conductor 6. As described above, the above-mentioned power line is composed of, in order from the outer container 2A to the outer container 2B, the second conductor 6A, the spacer conductor 33A, the connecting conductor 7A, the first conductor 5, the connecting conductor 7B, the spacer conductor 33B, and the second conductor 6B.

[0033] The spacer 3 has projections 32 (32A, 32B) that project toward the inner container 1 in the X-axis direction on the surface of the entire plate-like form facing the inner container 1. The projections 32 may be configured from or include the spacer conductors 33. In these cases, the spacer conductors 33 can be easily connected to the connecting conductors 7 (described later) that are members for electrically connecting the spacer conductors 33 to the first conductors 5 of the inner container 1.

[0034] The protruding portion 32 may also be configured to include the insulating portion 31. In this case, it is possible to ensure a creepage distance on the surface of the insulating portion 31 of the spacer 3 between the spacer conductor 33, the housing of the inner container 1, and the housing of the outer container 2, thereby improving the insulation properties of the gas insulated equipment 100. Fig. 2 shows an example in which the protruding portion 32 of the spacer 3A includes the insulating portion 31 and the spacer conductor 33.

[0035] Each of the spacer conductors 33 for three phases is configured to penetrate the insulating portion 31 at the protruding portion 32A corresponding to each spacer conductor 33. Therefore, the apex portion (most protruding portion 34A) of each protruding portion 32A is made up of the spacer conductor 33A. Also, the spacer 3B in FIG. 2 shows an example in which the protruding portion 32B includes the spacer conductor 33B. In the spacer 3B, each of the spacer conductors 33B for three phases penetrates the insulating portion 31 to form the protruding portion 32B.

[0036] <First adapter 4> Fig. 3 is a diagram showing the first adapter 4 of the gas insulated apparatus 100. Reference numeral 3001 in Fig. 3 is a diagram showing the first adapter 4 as viewed from the X-axis direction, and reference numeral 3002 in Fig. 3 is a diagram showing the first adapter 4 as viewed from the Y-axis direction. Fig. 4 is a diagram showing another example shape of the first adapter 4. The first adapter 4 is a ring-shaped member corresponding to the flange shape, which adjusts the distance between the contact surface of the flange 12 of the inner vessel 1 and the contact surface of the spacer 3 on the inner vessel 1 side in the flange connection between the inner vessel 1 and the outer vessel 2.

[0037] 2 to 4, the first adapter 4 is provided with an opening 41 to enable electrical connection between the spacer conductor 33 and the first conductor 5 of the inner container 1 via the connecting conductor 7. As is well known, flange connections are usually performed by fastening with bolts and nuts, so the first adapter 4 may be provided with bolt holes along the periphery (not shown in FIGS. 3 and 4) (see FIG. 12).

[0038] The opening 41 of the first adapter 4 only needs to be able to pass the spacer conductor 33, and the shape of the opening 41 is not limited to the circle shown in Fig. 3 and may be an oval shape as shown in Fig. 4. Alternatively, the shape of the opening 41 may be a rectangle with rounded corners, an ellipse, or any other shape. The first adapter 4 may be made of metal, resin, ceramic, or any other appropriate material.

[0039] <Positional relationship of each part in the flange connection on the outer vessel 2A side> When the inner container 1 is connected between a pair of outer containers 2, the positional relationship of each part in the first direction D1, i.e., the X-axis direction, at the part where the inner container 1 and the outer container 2A are flange-connected is as follows.

[0040] The position of the contact surface of flange 22A of outer container 2A is designated x1, the contact position between spacer 3A and first adapter 4A at the portion clamped by flange joining is designated x2, and the position of the contact surface of flange 12A of inner container 1 is designated x3. Position x3 is also the position of contact surface 42A of first adapter 4A on the inner container 1 side. The thickness of spacer 3A at the portion clamped by flange joining corresponds to x2-x1, and the thickness of first adapter 4A corresponds to x3-x2.

[0041] The first adapter 4A has a thickness such that the contact surface 42A on the inner container 1 side is located closer to the inner container 1 in the first direction D1 than the most protruding part 34A of the convex part 32A on the inner container 1 side of the spacer 3A. Therefore, the position of the most protruding part 34A of the convex part 32A on the inner container 1 side of the spacer 3A is between positions x2 and x3.

[0042] The position of the end of first conductor 5 of inner container 1 on the outer container 2A side is on the positive side in the X-axis direction of position x3 of the contact surface of flange 12A of inner container 1. In other words, the end of first conductor 5 of inner container 1 on the outer container 2A side is located at a position set back from position x3 of the contact surface of flange 12A of inner container 1. Connecting conductor 7A is arranged to connect the end of first conductor 5 on the outer container 2A side thus positioned to spacer conductor 33A at the most protruding portion 34A of spacer 3A.

[0043] <Positional relationship of each part in the flange connection on the outer vessel 2B side> When the inner container 1 is connected between a pair of outer containers 2, the positional relationship of each part in the first direction D1, i.e., the X-axis direction, at the part where the inner container 1 and the outer container 2B are flange-connected is as follows.

[0044] The position of the contact surface of flange 12B of inner container 1 is designated x4, the contact position between spacer 3B and first adapter 4B at the portion clamped by flange joint is designated x5, and the position of the contact surface of flange 22B of outer container 2B is designated x6. Position x4 is also the position of contact surface 42B of first adapter 4B on the inner container 1 side. The thickness of the portion of spacer 3B clamped at the flange joint corresponds to x6-x5, and the thickness of first adapter 4B corresponds to x5-x4.

[0045] The first adapter 4B has a thickness such that the contact surface 42B on the inner container 1 side is located closer to the inner container 1 in the first direction D1 than the most protruding part 34B of the convex part 32B on the inner container 1 side of the spacer 3B. Therefore, the position of the most protruding part 34B of the convex part 32B on the inner container 1 side of the spacer 3B is between positions x4 and x5.

[0046] The position of the end of the first conductor 5 of the inner container 1 on the outer container 2B side is on the negative side in the X-axis direction of the position x4 of the contact surface of the flange 12B of the inner container 1. In other words, the end of the first conductor 5 of the inner container 1 on the outer container 2B side is located at a position set back from the position x4 of the contact surface of the flange 12B of the inner container 1.

[0047] The connecting conductor 7B is arranged to connect the end of the first conductor 5 positioned in this way on the outer container 2B side to the spacer conductor 33B at the most protruding portion 34B of the spacer 3B. As described above, both ends of the first conductor 5 are configured to be located closer to the center of the inner container 1 than the contact surface of the flange 12 of the inner container 1 in the first direction D1 (X-axis direction).

[0048] <Removing the inner container> The procedure for removing the inner container 1 from the pair of outer containers 2 in the gas insulated apparatus 100 according to the first embodiment will be described below with reference to Fig. 5 and Fig. 6. Fig. 5 is a front view of the gas insulated apparatus 100 showing the state in which the inner container 1 has been removed from the pair of outer containers 2. Fig. 6 is a cross-sectional end view of the inner container 1 and the outer container 2 taken along the XY plane, showing the state in which the inner container 1 has been removed from the pair of outer containers 2.

[0049] First, the insulating gas sealed in the inner container 1 is removed, and the inside of the inner container 1 is opened to the atmosphere. If the inside of the outer container 2 is at high pressure, the pressure inside the outer container 2 is adjusted to near atmospheric pressure. The sealing plate of the handhole portion 13 of the inner container 1 is removed, allowing access to the inside of the inner container 1 from the outside.

[0050] Next, a worker works through the opening (handhole) of handhole portion 13 to remove connecting conductor 7A from first conductor 5 and spacer conductor 33A, and also removes connecting conductor 7B from first conductor 5 and spacer conductor 33B. Note that Fig. 6 shows the state after the sealing plate of handhole portion 13, connecting conductor 7A, and connecting conductor 7B have been removed.

[0051] Thereafter, the fastening members such as bolts and nuts that connect the flanges of the inner container 1 and outer container 2A and the fastening members such as bolts and nuts that connect the flanges of the inner container 1 and outer container 2B are removed, and the fastening of each flange connection is released. In this way, the inner container 1 can be pulled out from the outer containers 2A and 2B in a direction perpendicular to the first direction D1 (X-axis) at the position of the contact surface of the flange 12A of the inner container 1 (position x3) and the position of the contact surface of the flange 12B of the inner container 1 (position x4).

[0052] At the flange connection portion, the first adapter 4 having a predetermined thickness is disposed closer to the inner vessel 1 than the spacer 3 separating the inner vessel 1 and the outer vessel 2, so the inner vessel 1 can be removed in this manner without the spacer 3 interfering with the inner vessel 1. Thus, according to the first embodiment, it becomes possible to remove only the inner vessel 1 without removing the pair of outer vessels 2 from the gas insulation system. This makes it easy to perform maintenance including the interior of the inner vessel 1, replacement of the inner vessel 1 itself, replacement of the first adapter 4, etc.

[0053] [Embodiment 2] Other embodiments of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

[0054] <Configuration overview> In the gas insulated apparatus 101 according to the second embodiment of the present disclosure, unlike the gas insulated apparatus 100 according to the first embodiment, the inner container 1 is removed from the outer container 2 at the position of the contact surface of the flange 22 of the outer container 2.

[0055] Fig. 7 is a diagram showing a schematic configuration of gas insulated apparatus 101 according to embodiment 2. Reference numeral 7001 in Fig. 7 is a plan view of gas insulated apparatus 101, and reference numeral 7002 in Fig. 7 is a front view of gas insulated apparatus 101. Fig. 8 is a cross-sectional end view showing the main parts of gas insulated apparatus 101 when cut along the XY plane.

[0056] In the gas insulated apparatus 101 according to the second embodiment, the second adaptor 4X (4XA, 4XB) and the spacer 3 are held between the flange 22 of the outer container 2 and the flange 12 of the inner container 1 in a state where the second adaptor 4X and the spacer 3 are in contact with each other. Each second adaptor 4 is disposed between each spacer 3 and each flange 22 of the outer container 2.

[0057] Here, the second adapter 4X and the spacer 3 are sandwiched between the flange 22 of the outer container 2 and the flange 12 of the inner container 1 so that the second adapter 4X contacts the contact surface of the flange 22 of the outer container 2 and the spacer 3 contacts the contact surface of the flange 12 of the inner container 1. The shape of the second adapter 4X is the same as that of the first adapter 4 in the first embodiment.

[0058] Each spacer 3 (3A, 3B) has a protrusion 32 (32A, 32B) that protrudes toward the side away from the inner container 1 in the X-axis direction on the surface of the entire plate-like form opposite to the inner container 1. Each spacer conductor 33 is electrically connected to the second conductor 6 of the outer container 2 on the outer container 2 side. At this time, each spacer conductor 33 is electrically connected to the second conductor 6 of the outer container 2 via the connecting conductor 8 (8A, 8B) through the opening 41 of each second adapter 4X.

[0059] More specifically, the spacer conductor 33 is connected to the second conductor 6 via the connecting conductor 8 by a known method such as bolt fixing. In this case, an appropriate fastener may be used in combination to connect the spacer conductor 33 to the connecting conductor 8 and to connect the connecting conductor 8 to the second conductor 6. The spacer conductor 33 and the first conductor 5 may be connected via the connecting conductor 7 or directly.

[0060] <Positional relationship of each part in the flange connection on the outer vessel 2A side> When the inner container 1 is connected between a pair of outer containers 2, the positional relationship of each part in the first direction D1, i.e., the X-axis direction, at the part where the inner container 1 and the outer container 2A are flange-connected is as follows.

[0061] The position of the contact surface of flange 22A of outer container 2A is designated as p1, the contact position between second adapter 4XA and spacer 3A in the portion sandwiched by flange joining is designated as p2, and the position of the contact surface of flange 12A of inner container 1 is designated as p3. Position p1 is also the position of contact surface 43XA on the outer container 2A side of second adapter 4XA. The thickness of spacer 3A in the portion sandwiched by flange joining corresponds to p3-p2, and the thickness of second adapter 4XA corresponds to p2-p1.

[0062] The second adapter 4XA has a thickness such that the contact surface 43XA on the outer container 2A side is located on the side away from the inner container 1 in the first direction D1 than the most protruding part 34A of the convex part 32A of the spacer 3A on the side opposite the inner container 1. Therefore, the position of the most protruding part 34A of the convex part 32A of the spacer 3A on the side opposite the inner container 1 is between positions p1 and p2.

[0063] The position of the inner container 1 side end of second conductor 6A of outer container 2A is on the negative side of the X axis from position p1 of the contact surface of flange 22A of outer container 2A. In other words, the inner container 1 side end of second conductor 6A of outer container 2A is located further back than position p1 of the contact surface of flange 22A of outer container 2A. Connecting conductor 8A is arranged to connect the inner container 1 side end of second conductor 6A located in this position to spacer conductor 33A at the most protruding portion 34A of spacer 3A.

[0064] <Positional relationship of each part in the flange connection on the outer vessel 2B side> When the inner container 1 is connected between a pair of outer containers 2, the positional relationship of each part in the first direction D1, i.e., the X-axis direction, at the part where the inner container 1 and the outer container 2B are flange-connected is as follows.

[0065] The position of the contact surface of flange 12B of inner container 1 is designated p4, the contact position between spacer 3B and second adapter 4XB at the portion sandwiched by flange joining is designated p5, and the position of the contact surface of flange 22B of outer container 2B is designated p6. Position p6 is also the position of contact surface 43XB of second adapter 4XB on the outer container 2 side. The thickness of the portion sandwiched by flange joining of spacer 3B corresponds to p5-p4, and the thickness of second adapter 4XB corresponds to p6-p5.

[0066] The second adapter 4XB has a thickness such that the contact surface 43XB on the outer container 2B side is located on the side away from the inner container 1 in the first direction D1 than the most protruding part 34B of the convex part 32B of the spacer 3B on the side opposite the inner container 1. Therefore, the position of the most protruding part 34B of the convex part 32B of the spacer 3B on the side opposite the inner container 1 is between positions p5 and p6.

[0067] The position of the end of the second conductor 6B of the outer container 2B on the inner container 1 side is on the positive side in the X-axis direction of the position p6 of the contact surface of the flange 22B of the outer container 2B. In other words, the end of the second conductor 6B of the outer container 2B on the inner container 1 side is located further back than the position p6 of the contact surface of the flange 22B of the outer container 2B. The connecting conductor 8B is arranged to connect the end of the second conductor 6B on the inner container 1 side thus positioned to the spacer conductor 33B at the most protruding portion 34B of the spacer 3B.

[0068] <Removing the inner container> In the gas insulated apparatus 101 according to the second embodiment, a procedure for removing the inner container 1 from the pair of outer containers 2 will be described below with reference to Fig. 9. Fig. 9 is a front view of the gas insulated apparatus 100 showing a state in which the inner container 1 has been removed from the outer container 2.

[0069] First, the insulating gas sealed in each outer container 2 is removed, and the inside of each outer container 2 is opened to the atmosphere. If the inside of the inner container 1 is at high pressure, the pressure inside the inner container 1 is adjusted to near atmospheric pressure. Also, the sealing plates of the handholes (not shown) provided in each outer container 2 are removed, making each outer container 2 accessible. Next, an operator works through the openings (handholes) of each handhole to remove the connecting conductor 8A from the second conductor 6A and spacer conductor 33A, and also remove the connecting conductor 8B from the second conductor 6B and spacer conductor 33B.

[0070] Thereafter, the fastening members such as bolts and nuts that connect the flanges of the inner container 1 and outer container 2A and the fastening members such as bolts and nuts that connect the flanges of the inner container 1 and outer container 2B are removed, and the fastening of each flange connection is released. In this way, the inner container 1 can be pulled out from the outer container 2A and outer container 2B in a direction perpendicular to the first direction D1 (X-axis) at the contact surface of the flange 22A of the outer container 2A (position p1) and the contact surface of the flange 22B of the outer container 2B (position p6).

[0071] At each flange connection, the second adapter 4X of a predetermined thickness is disposed closer to the outer vessel 2 than the spacer 3 separating the inner vessel 1 and outer vessel 2, so the inner vessel 1 can be removed in this manner without the spacers 3 interfering with the outer vessel 2. Thus, according to the second embodiment, it becomes possible to remove only the inner vessel 1 without removing the pair of outer vessels 2 from the gas insulation system. This makes it easy to perform maintenance including the interior of the inner vessel 1, replacement of the inner vessel itself, replacement of the second adapter 4X, replacement of the spacers 3, etc.

[0072] [Embodiment 3] Another embodiment of the present invention will be described below. Fig. 10 is a diagram showing a schematic configuration of a gas insulated apparatus 102 according to a third embodiment of the present disclosure. Reference numeral 1010 in Fig. 10 is a plan view of the gas insulated apparatus 102, and reference numeral 1011 in Fig. 10 is a front view of the gas insulated apparatus 102. Fig. 11 is a front view showing the gas insulated apparatus 102 with a spacer 3A, a first adapter 4A, and a second adapter 4XA removed.

[0073] 10, the gas insulated apparatus 102 includes, in addition to the configuration of the gas insulated apparatus 100 according to the first embodiment, the second adapter 4X that is sandwiched between the flange 22 of each outer container 2 and the spacer 3, as described in the second embodiment. Since the gas insulated apparatus 102 includes the same first adapter 4 as in the first embodiment, the inner container 1 can be removed from each outer container 2 at the position of the contact surface of each flange 12 of the inner container 1, without removing each outer container 2 from the gas insulation system.

[0074] Furthermore, since the gas insulated equipment 102 is provided with the second adapter 4X similar to that of the second embodiment, the inner container 1 can be removed from each outer container 2 at the position of the contact surface of the flange 12 of each outer container without removing each outer container 2 from the gas insulation system. Furthermore, as shown in Fig. 11, from a state in which the inner container 1 is connected between a pair of outer containers 2, the spacer 3, first adapter 4, and second adapter 4X can be removed as a set at the flange connection on either side without removing the inner container 1.

[0075] [Modification] The adapter 4V of this modified example is a modified example of the first adapter 4 or the second adapter 4X. Fig. 12 is a perspective view of the adapter 4V of this modified example. Fig. 13 is a schematic diagram for explaining an example of use of the adapter 4V of this modified example. In the example shown in Fig. 13, the spacer 3 has protrusions 32 on both surfaces.

[0076] The adapter 4V has an annular shape with a circular or elliptical outer edge. A groove 404 is formed in an inner peripheral surface 401 of the adapter 4V, recessed toward the outer peripheral surface 402. A through-hole 405 is formed in the groove 404 of the adapter 4V, penetrating to the outer peripheral surface 402.

[0077] 13, sensor 50 can be installed in groove 404 of adapter 4V, and wiring from sensor 50 to external device 53 can be drawn out from outer circumferential surface 402 through through hole 405 while sealing through hole 405 in an appropriate manner. Using adapter 4V for flange connection makes it possible to easily attach the sensor to gas-insulated equipment.

[0078] Furthermore, when using a sensor that can be attached to a through hole, groove 404 for attaching the sensor to inner circumferential surface 401 is not necessary, and adapter 4W having through hole 406 that penetrates from inner circumferential surface 401 to outer circumferential surface 402 may be used, as shown in Fig. 13. An example of a sensor that can be applied to adapter 4W is pressure sensor 52.

[0079] 〔summary〕 A gas insulated apparatus according to a first aspect of the present disclosure includes a pair of outer containers, each having a second conductor disposed therein, and an inner container sandwiched between the pair of outer containers, the pair of outer containers and the inner containers having a first conductor disposed therein, the gas insulated apparatus being configured such that the pair of outer containers and the inner containers are arranged side by side in a first direction and the inner containers are flange-connected to each of the outer containers, the gas insulated apparatus further comprising: spacers sandwiched between the flanges of each of the outer containers and the flanges of the inner container, each spacer isolating an interior of each of the outer containers from an interior of the inner container, the spacers having an insulating portion and a spacer conductor penetrating the insulating portion, and having a convex portion provided on a surface on the side of the inner container; and spacers each being disposed between the flange of the inner container, and a first adapter having an opening, the first adapter being an adapter sandwiched between the flange of each outer container and the flange of the inner container, wherein both ends of the first conductor are located closer to the center of the inner container in the first direction than the contact surface of the flange of the inner container, each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers, and each of the spacer conductors is electrically connected to the first conductor via a connecting conductor through the opening of each of the first adapters, and each of the first adapters has a thickness such that when the inner container is connected between the pair of outer containers, the contact surface on the inner container side is located closer to the inner container in the first direction than the most protruding part of the convex portion of each of the spacers.

[0080] According to the above configuration, it is possible to provide a gas insulated device in which maintenance of the inner vessel can be easily performed without using a bellows mechanism which has problems in terms of cost and durability.

[0081] A gas insulated apparatus according to a second aspect of the present disclosure includes a pair of outer containers, each having a second conductor disposed therein, and an inner container sandwiched between the pair of outer containers, the pair of outer containers and the inner containers being arranged side by side in a first direction, and the inner containers being flange-connected to each of the outer containers, the gas insulated apparatus including: spacers sandwiched between the flanges of each of the outer containers and the flanges of the inner container, isolating the interior of each of the outer containers from the interior of the inner container, the spacers having an insulating portion and a spacer conductor penetrating the insulating portion, and having a convex portion on a surface opposite to the inner container; and spacers disposed between each of the spacers and the flanges of each of the outer containers, and separating the interior of each of the outer containers from the interior of the inner container. and a second adapter having an opening, the second adapter being an adapter sandwiched between the flange and the flange of the inner container, wherein the end of each of the second conductors facing the inner container is located on a side farther from the inner container in the first direction than the contact surface of the flange of each of the outer containers, each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers via a connecting conductor through the opening of each of the second adapters, and each of the spacer conductors is electrically connected to the first conductor, and each of the second adapters has a thickness such that when the inner container is connected between the pair of outer containers, the contact surface facing the outer container is located on a side farther from the inner container in the first direction than the most protruding portion of each of the convex portions of each of the spacers.

[0082] According to the above configuration, it is possible to provide a gas insulated device in which maintenance of the inner vessel can be easily performed without using a bellows mechanism which has problems in terms of cost and durability.

[0083] The gas insulated equipment according to a third aspect of the present disclosure may be configured as in the first aspect, further comprising second adapters each disposed between each of the spacers and a flange of each of the outer containers, sandwiched between the flange of each of the outer containers and the flange of the inner container, and each having an opening, wherein an end of each of the second conductors facing the inner container is located on a side farther from the inner container than a contact surface of the flange of each of the outer containers, each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers via a connecting conductor through the opening of each of the second adapters, and each of the second adapters has a thickness such that, when the inner container is connected between the pair of outer containers, the contact surface facing the outer container is located on a side farther from the inner container than a most protruding portion of each of the spacers facing the outer container in the first direction.

[0084] According to the above-mentioned configuration, it is possible to provide a gas insulated device in which the spacer and the adapter sandwiched between the inner container and the outer container can also be easily removed.

[0085] The gas insulated device according to a fourth aspect of the present disclosure is the gas insulated device of the first or third aspect, wherein the first adapter has an annular shape with a circular or elliptical outer edge. According to the above configuration, an adapter that is appropriately adapted to the shape of the flange can be provided.

[0086] The gas insulated device according to aspect 5 of the present disclosure is any one of aspects 1, 3, or 4, wherein the first adapter has a through hole formed therein that penetrates from the outer peripheral surface of the first adapter to a groove formed in the inner peripheral surface of the first adapter. With the above configuration, it is possible to realize a gas insulated device to which a sensor can be easily attached.

[0087] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0088] 100, 101, 102 Gas insulated equipment 1 Inner container 12, 12A, 12B Flange of inner vessel 2, 2A, 2B outer container 22, 22A, 22B Flange of outer vessel 3, 3A, 3B spacers 31, 31A, 31B Insulation section 32, 32A, 32B convex part 33, 33A, 33B spacer conductor 34, 34A, 34B Most protruding part 4, 4A, 4B 1st adapter (adapter) 4X, 4XA, 4XB Second Adapter (Adapter) 5, 5A, 5B First conductor 6, 6A, 6B Second conductor 7, 7A, 7B, 8, 8A, 8B connecting conductors D1 1st direction

Claims

1. A gas insulated device comprising a pair of outer containers, each having a second conductor disposed therein, and an inner container sandwiched between the pair of outer containers and having a first conductor disposed therein, the pair of outer containers and the inner containers being arranged side by side in a first direction, and the inner containers being flange-connected to each of the outer containers, a spacer that is sandwiched between the flange of each of the outer containers and the flange of the inner container, and that separates the interior of each of the outer containers from the interior of the inner container, the spacer having an insulating portion and a spacer conductor that penetrates the insulating portion, and a convex portion provided on a surface on the side of the inner container; a first adapter having an opening, the first adapter being disposed between each of the spacers and the flange of the inner container, and being sandwiched between the flange of each of the outer containers and the flange of the inner container; both ends of the first conductor are located closer to the center of the inner container than a contact surface of a flange of the inner container in the first direction; each spacer conductor is electrically connected to a respective second conductor of each outer container; Each of the spacer conductors is electrically connected to the first conductor via a connecting conductor through the opening of each of the first adapters; Each of the first adapters comprises: a contact surface of the spacer on the inner container side has a thickness that, when the inner container is connected between the pair of outer containers, is positioned closer to the inner container than a most protruding portion of the convex portion of each of the spacers in the first direction.

2. A gas insulated device comprising a pair of outer containers, each having a second conductor disposed therein, and an inner container sandwiched between the pair of outer containers and having a first conductor disposed therein, the pair of outer containers and the inner containers being arranged side by side in a first direction, and the inner containers being flange-connected to each of the outer containers, a spacer that is sandwiched between the flange of each of the outer containers and the flange of the inner container, and that separates the interior of each of the outer containers from the interior of the inner container, the spacer having an insulating portion and a spacer conductor that penetrates the insulating portion, and a convex portion provided on a surface opposite to the inner container; a second adapter having an opening, the second adapter being disposed between each of the spacers and the flange of each of the outer containers and sandwiched between the flange of each of the outer containers and the flange of the inner container; an end portion of each of the second conductors on the inner container side is located on a side farther from the inner container than a contact surface of a flange of each of the outer containers in the first direction; Each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers via a connecting conductor through the opening of each of the second adapters; each spacer conductor electrically connected to the first conductor; Each of the second adapters is a gas insulated device, wherein, in a state in which the inner container is connected between the pair of outer containers, a contact surface of each of the outer containers has a thickness that positions the contact surface on a side farther from the inner container than a most protruding portion of each of the convex portions of each of the spacers in the first direction.

3. The method further includes a second adapter, which is disposed between each of the spacers and the flange of each of the outer containers, and is sandwiched between the flange of each of the outer containers and the flange of the inner container, and has an opening. an end portion of each of the second conductors on the inner container side is located on a side farther from the inner container than a contact surface of a flange of each of the outer containers in the first direction; Each of the spacer conductors is electrically connected to each of the second conductors of each of the outer containers via a connecting conductor through the opening of each of the second adapters; Each of the second adapters is 2. The gas insulated device according to claim 1, wherein, in a state in which the inner container is connected between the pair of outer containers, a contact surface of each of the outer containers has a thickness positioned on a side farther from the inner container than a most protruding portion of each of the spacers on the outer container side in the first direction.

4. The first adapter has an annular shape with a circular or elliptical outer edge. The gas insulated equipment according to claim 1.

5. The first adapter has a through hole formed therein, the through hole extending from an outer peripheral surface of the first adapter to a groove formed in an inner peripheral surface of the first adapter. The gas insulated equipment according to claim 1.

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