Gas-insulated equipment

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 Art

[0002] A gas insulation system such as GIS (Gas Insulated Switchgear) is configured by connecting a plurality of containers filled with an insulating gas. In a gas insulation system, a container for housing a connection member may be connected between a pair of containers for housing line conductors to electrically connect the line conductors of the pair of containers. Such an inner container for connection may need to be removed during maintenance or the like during operation.

[0003] Patent Document 1 discloses a technique in which a stretchable bellows compression device is used as an inner container. In the prior art of Patent Document 1, by compressing the bellows, the connection member housed inside the bellows is exposed, enabling removal of the connection member, and the bellows compression device as the inner container can be removed from between the pair of containers.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, applying a bellows mechanism to an inner container results in high costs and there are also concerns regarding durability. One aspect of the present invention aims to provide a gas insulated device that can easily perform maintenance of an inner container without using such a bellows mechanism with concerns.

Means for Solving the Problems

[0006] To solve the above problems, a gas-insulated device according to one aspect of the present invention comprises a pair of outer containers, each having a second conductor disposed inside, and an inner container sandwiched between the pair of outer containers, having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, wherein the gas-insulated device comprises a spacer that is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, the spacer having an insulating portion and a spacer conductor that penetrates the insulating portion, and having a convex portion on the side surface of the inner container, and between each of the spacers and the flange of the inner container An adapter is positioned and sandwiched between the flanges of each of the outer containers and the flange of the inner container, comprising a first adapter having an opening, wherein both ends of the first conductor are located on the central side of the inner container than the contact surface of the flange of the inner container in the first direction, each spacer conductor is electrically connected to each of the second conductors of each of the outer containers, each spacer conductor is electrically connected to the first conductor via a connecting conductor through the opening of each first adapter, and each first adapter has a thickness such that, with the inner container connected between the pair of outer containers, the contact surface on the inner container side is located on the inner container side than the most protruding part of the convex portion of each spacer in the first direction.

[0007] A gas-insulated device according to another aspect of the present invention comprises a pair of outer containers, each having a second conductor disposed inside, and an inner container, sandwiched between the pair of outer containers and having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, wherein the gas-insulated device comprises a spacer that is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, the spacer having an insulating portion and a spacer conductor that penetrates the insulating portion, and having a protrusion on the side opposite to the inner container, and each of the spacers and the flange of each outer container, respectively, and each of the outer containers An adapter sandwiched between the flange of the outer container and the flange of the inner container, comprising a second adapter having an opening, wherein the inner container side end of each second conductor is located away from the inner container in the first direction from the contact surface of the flange of each outer container, each spacer conductor is electrically connected to each second conductor of each outer container via a connecting conductor through the opening of each second adapter, each spacer conductor is electrically connected to the first conductor, and each second adapter has a thickness such that, with the inner container connected between the pair of outer containers, the contact surface on the outer container side is located away from the inner container in the first direction from the most protruding part of each convex part of each spacer. [Effects of the Invention]

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

[0009] [Figure 1] This figure shows the schematic configuration of the gas-insulated equipment according to Embodiment 1 of this disclosure. [Figure 2] This is a cross-section end view showing the main parts of the gas-insulated equipment described above. [Figure 3]This figure shows the first adapter of the gas-insulated equipment described above. [Figure 4] This figure shows another configuration example of the first adapter. [Figure 5] This is a front view showing the gas-insulated equipment described above with the inner container removed from the pair of outer containers. [Figure 6] This is a cross-section end view showing the gas-insulated equipment described above with the inner container removed from the pair of outer containers. [Figure 7] This figure shows the schematic configuration of the gas-insulated equipment according to Embodiment 2 of this disclosure. [Figure 8] This is a cross-section end view showing the main parts of the gas-insulated equipment described above. [Figure 9] This is a front view showing the gas-insulated equipment described above with the inner container removed from the pair of outer containers. [Figure 10] This figure shows the schematic configuration of a gas-insulated device according to Embodiment 3 of the present disclosure. [Figure 11] This is a front view of the gas-insulated device described above, showing the device with the spacer, first adapter, and second adapter removed. [Figure 12] This figure shows modified examples of the first adapter and the second adapter. [Figure 13] This is a schematic diagram illustrating an example of how to use the modified adapter. [Modes for carrying out the invention]

[0010] [Embodiment 1] Embodiment 1 of the present invention will be described in detail below. However, the following description is an example of a gas-insulated device 100 according to the present invention, and the technical scope of the present invention is not limited to the contents of the following description and figures.

[0011] <Overview of Gas Insulated Equipment 100> The gas-insulated equipment 100 according to Embodiment 1 of the present disclosure is equipment that can be applied to a gas-insulated system such as a GIS (Gas Insulated Switchgear). The gas-insulated equipment 100 mainly includes an inner container 1 and a pair of outer containers 2, and a power line is configured to communicate between these containers.

[0012] In the following, a case will be described as an example where the inner container 1 is a device (so-called bus container) that houses a power line passing from one outer container 2 to the other outer container 2. However, the inner container 1 may be configured to have functions such as a switch, a circuit breaker, an instrument transformer, a lightning arrester, or a voltage detection device. The same applies to the outer container 2.

[0013] FIG. 1 is a diagram showing a schematic configuration of the gas-insulated equipment 100 according to Embodiment 1 of the present disclosure. Reference numeral 1001 in FIG. 1 is a plan view of the gas-insulated equipment 100, and reference numeral 1002 in FIG. 1 is a front view of the gas-insulated equipment 100. In the gas-insulated equipment 100, the 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 the first direction D1, and the inner container 1 and each outer container 2A and 2B are flange-connected.

[0014] In the following description, the first direction D1, which is the direction in which the inner container 1 and the pair of outer containers 2 are arranged in the gas-insulated equipment 100, is taken as the X-axis direction. The Y-axis direction and the Z-axis direction are directions that are orthogonal to each other and orthogonal to the X-axis direction. An insulating gas such as SF6 is enclosed in each of the inner container 1 and the pair of outer containers 2A and 2B.

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

[0016] In conventional technology, a retractable bellows compression device was sometimes used as an inner container sandwiched between a pair of outer containers. By applying this retractable bellows compression device to the inner container, it was possible to remove the inner container without having to detach the outer containers in the gas-insulated system.

[0017] However, with conventional technology, removing the inner container during maintenance requires compressing the bellows mechanism, resulting in poor work efficiency. Inner containers incorporating a bellows mechanism also have the drawback of being expensive. Furthermore, inner containers incorporating a bellows mechanism raise concerns regarding durability, and thus concerns regarding the maintenance of airtightness.

[0018] Furthermore, because it is difficult to manufacture an airtight bellows mechanism whose overall shape is other than cylindrical, when a bellows mechanism is applied, there is a problem that the shape of the inner container is limited to a cylinder. The gas-insulated device 100 according to Embodiment 1 is inventively designed so that the inner container 1 can be easily removed from the pair of outer containers 2 without applying a bellows compression device which has these problems to the inner container 1. According to the gas-insulated device 100 according to Embodiment 1, these problems are resolved.

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

[0020] Outer containers 2A and 2B are collectively referred to as outer container 2. Inner container 1 is a metal airtight container, and the first conductors 5 for the three phases are arranged inside. The first conductors 5 are appropriately held in place by the housing of inner container 1. The airtight housing of inner container 1 does not use any movable parts such as a bellows mechanism.

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

[0022] A flange 12A is provided at the negative end of the inner container 1 in the X-axis direction, and a flange 12B is provided at the positive end of the inner container 1 in the X-axis direction. The flanges 12A and 12B of the inner container 1 are collectively referred to as the flange 12 of the inner container 1. The contact surface of the flange 12A of the inner container 1 is perpendicular to the X-axis, and the contact surface of the flange 12B of the inner container 1 is perpendicular to the X-axis. In Embodiment 1, each flange 12 is a circular flange, but other shapes such as oval or rounded rectangles may also be used.

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

[0024] The flange connection between the outer container 2A and the inner container 1 is achieved 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 achieved 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] At the flange connection between the outer container 2A and the inner container 1, spacer 3A and first adapter 4A are inserted in the order from the outer container 2A to the inner container 1 (towards the positive X-axis direction). At the flange connection between the outer container 2B and the inner container 1, spacer 3B and first adapter 4B are inserted in the order from the outer container 2B to the inner container 1 (towards the negative X-axis direction). Spacer 3A and spacer 3B are collectively referred to as spacer 3. First adapter 4A and 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, such that spacer 3 contacts the contact surface of the flange 22 of the outer container 2 and first adapter 4 contacts the contact surface of the flange 12 of the inner container 1. Alternatively, with spacer 3 and 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 positioned between each spacer 3 and each flange 12 of the inner container 1.

[0027] As shown in Figure 1, the outer container 2 is further provided with an external connection flange 23 for connecting the gas-insulated equipment 100, which consists of the inner container 1 and the outer container 2, to other equipment. In the example shown in Figure 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 the only example.

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

[0029] <Spacer, connecting conductor> Hereafter, if the letter "A" is appended to the end of the symbols relating to the spacer portion and the connecting conductor, it represents the portion of spacer 3A or the connecting conductor connected to spacer 3A; if "B" is appended, it represents spacer 3B or the connecting conductor connected to spacer 3B; and if neither "A" nor "B" is appended, it represents a general term for these components.

[0030] As described above, the spacer 3 is a 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. The spacer 3 consists of an insulating portion 31 and a spacer conductor 33, with the portion that is in close contact with the contact surface of the flange 22 of the outer container 2 being the insulating portion 31. The spacer conductor 33 constitutes a part of the power line described above, and three phases of spacer conductors 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 connecting conductors 7 (7A, 7B) by known methods such as bolting or screwing. In this case, appropriate fasteners may be used in combination for connecting the spacer conductor 33 to the connecting conductors 7 (7A, 7B) and for connecting the connecting 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 known methods such as bolting or screwing. In this case, appropriate fasteners may also be used to connect the spacer conductor 33 and the second conductor 6. Thus, the power line described above is composed of the second conductor 6A, spacer conductor 33A, connecting conductor 7A, first conductor 5, connecting conductor 7B, spacer conductor 33B, and second conductor 6B, in order from the outer container 2A to the outer container 2B.

[0033] The spacer 3 has a plate-like overall surface, and on the surface facing the inner container 1, there are protrusions 32 (32A, 32B) that project toward the inner container 1 in the X-axis direction. The protrusions 32 may be made of a spacer conductor 33, or may include the spacer conductor 33. In these cases, the connection between the spacer conductor 33 and the connecting conductor 7, which will be described later, can be easily made, as this is a member for making an electrical connection between the spacer conductor 33 and the first conductor 5 of the inner container 1.

[0034] Furthermore, the protrusion 32 may also include an insulating portion 31. In this case, creepage distances can be secured 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 performance of the gas-insulated equipment 100. Figure 2 shows an example in spacer 3A where the protrusion 32 includes an insulating portion 31 and a spacer conductor 33.

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

[0036] <First Adapter 4> Figure 3 shows the first adapter 4 of the gas-insulated equipment 100. Reference numeral 3001 in Figure 3 indicates a view of the first adapter 4 from the X-axis direction, and reference numeral 3002 indicates a view of the first adapter 4 from the Y-axis direction. Figure 4 shows other examples of the shape of the first adapter 4. The first adapter 4 is a ring-shaped member that adjusts the distance between the contact surface of the flange 12 of the inner container 1 and the contact surface of the spacer 3 on the inner container 1 side in the flange connection between the inner container 1 and the outer container 2, according to the flange shape.

[0037] As shown in Figures 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 made by bolt / nut fastening, so the first adapter 4 may have bolt holes along its circumference, which are not shown in Figures 3 and 4 (see Figure 12).

[0038] The opening 41 of the first adapter 4 only needs to be large enough for the spacer conductor 33 to pass through, and the shape of the opening 41 is not limited to the circular shape shown in Figure 3, but may be an oval shape as shown in Figure 4. Alternatively, the shape of the opening 41 may be a rounded rectangle, an ellipse, or any other shape. The first adapter 4 can be made of metal, resin, ceramic, or any other appropriate material.

[0039] <Positional relationship of each part in the flange connection on the outer container 2A side> With the inner container 1 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 flange connection between the inner container 1 and the outer container 2A is as follows.

[0040] Let x1 be the position of the contact surface of the flange 22A of the outer container 2A, x2 be the contact position between the spacer 3A and the first adapter 4A in the portion sandwiched by the flange joint, and x3 be the position of the contact surface of the flange 12A of the inner container 1. Position x3 is also the position of the contact surface 42A on the inner container 1 side of the first adapter 4A. The thickness of the spacer 3A in the portion sandwiched by the flange joint corresponds to x2-x1, and the thickness of the 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 on the inner container 1 side of the spacer 3A's protruding portion 32A on the inner container 1 side, in the first direction D1. Therefore, the position of the most protruding portion 34A of the spacer 3A's protruding portion 32A on the inner container 1 side is between position x2 and position x3.

[0042] The position of the end of the first conductor 5 of the inner container 1 on the outer container 2A side is on the positive side in the X-axis direction compared to the position x3 of the contact surface of the flange 12A of the inner container 1. In other words, the end of the first conductor 5 of the inner container 1 on the outer container 2A side is set back from the position x3 of the contact surface of the flange 12A of the inner container 1. The connecting conductor 7A is positioned to connect the end of the first conductor 5 on the outer container 2A side, which is positioned in this manner, with the spacer conductor 33A at the most protruding part 34A of the spacer 3A.

[0043] <Positional relationship of each part in the flange connection on the outer container 2B side> With the inner container 1 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 flange connection between the inner container 1 and the outer container 2B is as follows.

[0044] Let x4 be the position of the contact surface of the flange 12B of the inner container 1, x5 be the contact position between the spacer 3B and the first adapter 4B in the portion sandwiched by the flange joint, and x6 be the position of the contact surface of the flange 22B of the outer container 2B. Position x4 is also the position of the contact surface 42B on the inner container 1 side of the first adapter 4B. The thickness of the spacer 3B in the portion sandwiched by the flange joint corresponds to x6-x5, and the thickness of the 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 on the inner container 1 side of the spacer 3B's protrusion 32B in the first direction D1. Therefore, the position of the protrusion 34B of the spacer 3B's protrusion 32B on the inner container 1 side is between position x4 and position 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 compared to 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 recessed from the position x4 of the contact surface of the flange 12B of the inner container 1.

[0047] The connecting conductor 7B is positioned to connect the end of the first conductor 5 on the outer container 2B side, which is positioned in this manner, with the spacer conductor 33B at the most protruding part 34B of the spacer 3B. As described above, both ends of the first conductor 5 are positioned on the central side of the inner container 1, relative to 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> In the gas-insulated device 100 according to Embodiment 1, the procedure for removing the inner container 1 from the pair of outer containers 2 will be described below with reference to Figures 5 and 6. Figure 5 is a front view of the gas-insulated device 100 showing the inner container 1 removed from the pair of outer containers 2. Figure 6 is a cross-sectional end view of the inner container 1 and outer containers 2 when cut in the XY plane, showing the inner container 1 removed from the pair of outer containers 2.

[0049] First, the insulating gas sealed inside 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 under 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, the worker removes the connecting conductor 7A from the first conductor 5 and spacer conductor 33A, and the connecting conductor 7B from the first conductor 5 and spacer conductor 33B, by working through the opening (handhole) of the handhole section 13. Figure 6 shows the state after the sealing plate, connecting conductor 7A, and connecting conductor 7B of the handhole section 13 have been removed.

[0051] Subsequently, the fastening members such as bolts / nuts connecting the flanges of the inner container 1 and the outer container 2A, and the fastening members such as bolts / nuts connecting the flanges of the inner container 1 and the outer container 2B are removed, thereby releasing the fastening at each flange connection. 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 contact surface (position x3) of the flange 12A of the inner container 1 and the contact surface (position x4) of the flange 12B of the inner container 1.

[0052] In the flange connection, the first adapter 4 of a predetermined thickness is positioned on the side of the inner container 1 that separates the inner container 1 and the outer container 2, rather than on the side of the spacer 3 that separates the inner container 1 and the outer container 2. As a result, the inner container 1 can be removed in this way without the spacer 3 interfering with the inner container 1. Thus, according to Embodiment 1, only the inner container 1 can be removed without removing the pair of outer containers 2 from the gas insulation system. This makes it easier to perform maintenance including the inside of the inner container 1, replace the inner container 1 itself, and replace the first adapter 4.

[0053] [Embodiment 2] Other embodiments of the present invention will be described below. For the sake of clarity, components having the same function as those described in the above embodiments will be denoted by the same reference numerals, and their descriptions will not be repeated.

[0054] <Configuration overview> In the gas-insulated equipment 101 according to Embodiment 2 of this disclosure, unlike the gas-insulated equipment 100 according to Embodiment 1, the removal of the inner container 1 from the outer container 2 is performed at the contact surface of the flange 22 of the outer container 2.

[0055] Figure 7 is a diagram showing the schematic configuration of the gas-insulated device 101 according to Embodiment 2. 7001 in Figure 7 is a plan view of the gas-insulated device 101, and 7002 in Figure 7 is a front view of the gas-insulated device 101. Figure 8 is a cross-section end view showing the main parts when the gas-insulated device 101 is cut in the XY plane.

[0056] In the gas-insulated equipment 101 according to Embodiment 2, the second adapters 4X (4XA, 4XB) and spacers 3 are in contact with each other, and the second adapters 4X and spacers 3 are sandwiched between the flange 22 of the outer container 2 and the flange 12 of the inner container 1. Each second adapter 4 is positioned 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, such 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 Embodiment 1.

[0058] Each spacer 3 (3A, 3B) has a protrusion 32 (32A, 32B) on the surface of its overall plate-like form that is opposite to the inner container 1, projecting toward the side away from the inner container 1 in the X-axis direction. Each spacer conductor 33 is electrically connected to the second conductor 6 of the outer container 2 on the side of the outer container 2. At this time, each spacer conductor 33 is electrically connected to each second conductor 6 of each outer container 2 via the connecting conductors 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 known methods such as bolt fastening. In this case, appropriate fasteners may be used in conjunction with the connection between the spacer conductor 33 and the connecting conductor 8, and between the connecting conductor 8 and the second conductor 6. The spacer conductor 33 and the first conductor 5 may be connected via the connecting conductor 7, or they may be directly connected.

[0060] <Positional relationship of each part in the flange connection on the outer container 2A side> With the inner container 1 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 flange connection between the inner container 1 and the outer container 2A is as follows.

[0061] Let p1 be the position of the contact surface of the flange 22A of the outer container 2A, p2 be the contact position between the second adapter 4XA and spacer 3A in the portion sandwiched by the flange joint, and p3 be the position of the contact surface of the flange 12A of the inner container 1. Position p1 is also the position of the contact surface 43XA of the second adapter 4XA on the outer container 2A side. In the portion sandwiched by the flange joint, the thickness of spacer 3A corresponds to p3-p2, and the thickness of the 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 further away from the inner container 1 than the most protruding part 34A of the convex part 32A of the spacer 3A opposite to the inner container 1, in the first direction D1. Therefore, the position of the most protruding part 34A of the convex part 32A of the spacer 3A opposite to the inner container 1 is between position p1 and position p2.

[0063] The end of the second conductor 6A of the outer container 2A on the inner container 1 side is located on the negative side in the X-axis direction compared to the position p1 of the contact surface of the flange 22A of the outer container 2A. In other words, the end of the second conductor 6A of the outer container 2A on the inner container 1 side is located recessed from the position p1 of the contact surface of the flange 22A of the outer container 2A. The connecting conductor 8A is positioned to connect the end of the second conductor 6A on the inner container 1 side, which is located in this manner, with the spacer conductor 33A at the most protruding part 34A of the spacer 3A.

[0064] <Positional relationship of each part in the flange connection on the outer container 2B side> With the inner container 1 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 flange connection between the inner container 1 and the outer container 2B is as follows.

[0065] Let p4 be the position of the contact surface of the flange 12B of the inner container 1, p5 be the contact position between the spacer 3B and the second adapter 4XB in the portion sandwiched by the flange joint, and p6 be the position of the contact surface of the flange 22B of the outer container 2B. Position p6 is also the position of the contact surface 43XB on the outer container 2 side of the second adapter 4XB. The thickness of the spacer 3B in the portion sandwiched by the flange joint corresponds to p5-p4, and the thickness of the 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 further away from the inner container 1 than the most protruding part 34B of the convex part 32B of the spacer 3B opposite to the inner container 1, in the first direction D1. Therefore, the position of the most protruding part 34B of the convex part 32B of the spacer 3B opposite to the inner container 1 is between position p5 and position p6.

[0067] The end of the second conductor 6B of the outer container 2B on the inner container 1 side is located on the positive X-axis side 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 set back from the position p6 of the contact surface of the flange 22B of the outer container 2B. The connecting conductor 8B is positioned to connect the end of the second conductor 6B on the inner container 1 side, which is positioned in this manner, with the spacer conductor 33B at the most protruding part 34B of the spacer 3B.

[0068] <Removing the inner container> In the gas-insulated device 101 according to Embodiment 2, the procedure for removing the inner container 1 from the pair of outer containers 2 will be described below with reference to Figure 9. Figure 9 is a front view of the gas-insulated device 100 showing the inner container 1 removed from the outer containers 2.

[0069] First, the insulating gas sealed inside 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 under 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 to allow access to each outer container 2. Next, the worker performs the work through the openings (handholes) of each handhole to detach the connecting conductor 8A from the second conductor 6A and the spacer conductor 33A, and to detach the connecting conductor 8B from the second conductor 6B and the spacer conductor 33B.

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

[0071] At each flange connection, a second adapter 4X of a predetermined thickness is positioned on the outer container 2 side of the spacer 3 that separates the inner container 1 and the outer container 2. As a result, the inner container 1 can be removed in this way without each spacer 3 interfering with each outer container 2. Thus, according to Embodiment 2, only the inner container 1 can be removed without removing the pair of outer containers 2 from the gas insulation system. This makes it easier to perform maintenance including the inside of the inner container 1, replacement of the inner container itself, replacement of the second adapter 4X, replacement of the spacer 3, and so on.

[0072] [Embodiment 3] Other embodiments of the present invention will be described below. Figure 10 is a diagram showing the schematic configuration of a gas-insulated device 102 according to Embodiment 3 of the present disclosure. 1010 in Figure 10 is a plan view of the gas-insulated device 102, and 1011 in Figure 10 is a front view of the gas-insulated device 102. Figure 11 is a front view showing the gas-insulated device 102 with the spacer 3A, first adapter 4A, and second adapter 4XA removed.

[0073] As shown in Figure 10, the gas-insulated device 102 further includes, in addition to the configuration of the gas-insulated device 100 according to Embodiment 1, a second adapter 4X, as described in Embodiment 2, which is sandwiched between the flange 22 of each outer container 2 and the spacer 3. In the gas-insulated device 102, by including the same first adapter 4 as in Embodiment 1, the inner containers 1 can be removed from each outer container 2 at the contact surface of each flange 12 of the inner container 1 without removing each outer container 2 from the gas-insulated system.

[0074] Furthermore, the gas-insulated equipment 102 is equipped with a second adapter 4X similar to that in Embodiment 2, which allows the inner container 1 to be removed from each outer container 2 at the contact surface of the flange 12 of each outer container without removing each outer container 2 from the gas-insulated system. Moreover, as shown in Figure 11, even when the inner container 1 is connected between a pair of outer containers 2, the spacer 3, the first adapter 4, and the second adapter 4X can be removed as a set at either flange connection without removing the inner container 1.

[0075] [Variation] The adapter 4V in this modified example is a modified version of the first adapter 4 or the second adapter 4X. Figure 12 is a perspective view of the adapter 4V in this modified example. Figure 13 is a schematic diagram illustrating an example of how the adapter 4V in this modified example can be used. In the example shown in Figure 13, the spacer 3 has protrusions 32 on both sides.

[0076] The adapter 4V has an annular shape, with its outer edge being, for example, circular or oval. The inner circumferential surface 401 of the adapter 4V has a groove 404 that is recessed toward the outer circumferential surface 402. In addition, a through hole 405 is formed in the groove 404 of the adapter 4, which penetrates to the outer circumferential surface 402.

[0077] As shown in Figure 13, the sensor 50 can be installed in the groove 404 of the adapter 4V, and the wiring from the sensor 50 to the external device 53 can be routed from the outer surface 402 through the through hole 405 while sealing the through hole 405 in an appropriate manner. By using the adapter 4V for flange connection, the sensor can be easily attached to gas-insulated equipment.

[0078] Furthermore, when using a sensor that can be mounted in a through hole, the groove 404 for mounting the sensor on the inner circumferential surface 401 is not necessary, and an adapter 4W with a through hole 406 that penetrates from the inner circumferential surface 401 to the outer circumferential surface 402 may be used, as shown in Figure 13. An example of a sensor applicable to the adapter 4W is a pressure sensor 52.

[0079] 〔summary〕 A gas-insulated device according to Embodiment 1 of the present disclosure comprises a pair of outer containers, each having a second conductor disposed inside, and an inner container, sandwiched between the pair of outer containers, having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, wherein a spacer is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, the spacer having an insulating portion and a spacer conductor penetrating the insulating portion, and having a protrusion on the side surface of the inner container, and is disposed between each of the spacers and the flange of the inner container, An adapter is sandwiched between the flange of each outer container and the flange of the inner container, and comprises a first adapter having an opening, wherein both ends of the first conductor are located on the central side of the inner container than the contact surface of the flange of the inner container in a first direction, each spacer conductor is electrically connected to each second conductor of each outer container, each spacer conductor is electrically connected to the first conductor via a connecting conductor through the opening of each first adapter, and each first adapter has a thickness such that, with the inner container connected between the pair of outer containers, the contact surface on the inner container side is located on the inner container side than the most protruding part of the convex portion of each spacer in a first direction.

[0080] According to the above configuration, it is possible to provide a gas-insulated device that allows for easy maintenance of the inner container without using a bellows mechanism, which has issues in terms of cost and durability.

[0081] A gas-insulated device according to aspect 2 of the present disclosure comprises a pair of outer containers, each having a second conductor disposed inside, and an inner container, sandwiched between the pair of outer containers and having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, and the gas-insulated device comprises a spacer, which is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, and has an insulating portion and a spacer conductor that penetrates the insulating portion, and has a protrusion on the side opposite to the inner container, and is disposed between each of the spacers and each of the flanges of the outer containers, respectively, and each of the outer containers An adapter sandwiched between a flange and the flange of the inner container, comprising a second adapter having an opening, wherein the inner container-side end of each second conductor is located away from the inner container in the first direction from the contact surface of the flange of each outer container, each spacer conductor is electrically connected to each second conductor of each outer container via a connecting conductor through the opening of each second adapter, each spacer conductor is electrically connected to the first conductor, and each second adapter has a thickness such that, with the inner container connected between the pair of outer containers, the contact surface on the outer container side is located away from the inner container in the first direction from the most protruding part of each convex portion of each spacer.

[0082] According to the above configuration, it is possible to provide a gas-insulated device that allows for easy maintenance of the inner container without using a bellows mechanism, which has issues in terms of cost and durability.

[0083] The gas-insulated device according to Embodiment 3 of the present disclosure further comprises, in Embodiment 1, a second adapter, which is disposed between each of the spacers and the flange of each of the outer containers, is sandwiched between the flange of each of the outer containers and the flange of the inner container, and has an opening, wherein the inner container side end of each of the second conductors is located away from the inner container in the first direction from the contact surface of the flange of each of the outer containers, and 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 may have a thickness such that, with the inner container connected between the pair of outer containers, the contact surface on each of the outer containers is located away from the inner container in the first direction from the most protruding part of each of the spacers on each of the outer containers.

[0084] According to the above configuration, it is possible to provide gas-insulated equipment that allows for easy removal of spacers and adapters sandwiched between the inner and outer containers.

[0085] In the gas-insulated equipment according to aspect 4 of this disclosure, in aspect 1 or 3 above, the first adapter may be annular in shape with a circular or oval outer edge. According to the above configuration, an adapter can be provided that is appropriately suited to the shape of the flange.

[0086] In the gas-insulated device according to aspect 5 of the present disclosure, in any of aspects 1, 3, or 4 above, the first adapter has a through hole formed that penetrates from the outer circumferential surface of the first adapter to a groove formed on the inner circumferential surface of the first adapter. With the above configuration, a gas-insulated device that can easily attach a sensor can be realized.

[0087] The present invention is not limited to the embodiments described above, 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 the inner container 2, 2A, 2B outer container 22, 22A, 22B Flange of the outer container 3, 3A, 3B Spacers 31, 31A, 31B Insulation 32, 32A, 32B protrusions 33, 33A, 33B Spacer conductors 34, 34A, 34B Most protruding part 4, 4A, 4B First 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 inside, and an inner container sandwiched between the pair of outer containers, having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, A spacer that is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, having an insulating portion and a spacer conductor that penetrates the insulating portion, and having a protrusion on the side surface of the inner container, Each adapter is positioned between the spacer and the flange of the inner container and is sandwiched between the flange of the outer container and the flange of the inner container, and comprises a first adapter having an opening, Both ends of the first conductor are located on the central side of the inner container, in the first direction, relative to 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. 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 is A gas-insulating device in which, when the inner container is connected between the pair of outer containers, the contact surface on the inner container side has a thickness that, in the first direction, is located on the inner container side of the protruding portion of each spacer's convex portion.

2. A gas-insulated device comprising a pair of outer containers, each having a second conductor disposed inside, and an inner container sandwiched between the pair of outer containers, having a first conductor disposed inside, wherein the pair of outer containers and the inner container are arranged side by side in a first direction, and the inner container and each of the outer containers are flange-connected, A spacer that is sandwiched between the flange of each outer container and the flange of the inner container, respectively, and separates the interior of each outer container from the interior of the inner container, having an insulating portion and a spacer conductor that penetrates the insulating portion, and having a protrusion on the side opposite to the inner container, Each of the spacers is positioned between 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 comprises a second adapter having an opening, The inner container-side end of each second conductor is located away from the inner container in the first direction from the contact surface of the flange of each outer container, Each of the spacer conductors is electrically connected to each of the second conductors of each outer container via a connecting conductor through the opening of each of the second adapters. Each of the spacer conductors is electrically connected to the first conductor. Each of the aforementioned second adapters is A gas-insulated device in which, with the inner container connected between the pair of outer containers, the contact surface on each of the outer containers has a thickness that, in the first direction, is located further away from the inner container than the most protruding part of each of the spacers' protrusions.

3. The system further comprises a second adapter, each positioned between the spacer and the flange of the outer container, sandwiched between the flange of the outer container and the flange of the inner container, and having an opening. The inner container-side end of each second conductor is located away from the inner container in the first direction from the contact surface of the flange of each outer container, Each of the spacer conductors is electrically connected to each of the second conductors of each outer container via a connecting conductor through the opening of each of the second adapters. Each of the aforementioned second adapters is The gas-insulating device according to claim 1, wherein, with the inner container connected between the pair of outer containers, the contact surface on each of the outer containers has a thickness that, in the first direction, is located further away from the inner container than the most protruding portion on each of the outer containers of each spacer.

4. The first adapter is an annular shape with a circular or oval outer edge. The gas-insulated device according to claim 1.

5. The first adapter has a through hole that extends from the outer circumferential surface of the first adapter to a groove formed on the inner circumferential surface of the first adapter. The gas-insulated device according to claim 1.

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