JPH025605Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a gas insulated electrical equipment device constructed by arranging a plurality of gas insulated electrical equipment units in parallel.

Prior Art Gas insulated electrical equipment, such as gas insulated switchgear, installed in electrical stations such as substations, is often constructed by housing predetermined equipment in a sealed container, as shown in Figure 1. A plurality of gas insulated electrical equipment units A1, A2, A3,... are installed in parallel,
Containers of adjacent units are connected to each other by a container connection part B. Fig. 2 shows the container connection part B of a conventional device of this type, in which a and b are the containers of two adjacently arranged units, and c and d are the containers of containers a and b, respectively. These are openings provided in adjacent side walls, and openings c and d are provided so as to be aligned with each other. opening c,
Nozzles e and f are welded to d, respectively, and an insulating spacer i is arranged between flanges g and h provided at mutually opposing ends of both nozzles e and f.
The flanges g and h are hermetically joined to an insulating spacer i via a packing j, and the insulating spacer i separates the gas between the containers a and b. A conductor k is provided to airtightly penetrate the insulating spacer i, and predetermined devices in the containers a and b are electrically connected to each other via the conductor k.

As mentioned above, in conventional gas-insulated electric equipment, pipe holders e,
Since f is required, the number of parts for the connection part increases, resulting in a disadvantage that the structure becomes complicated. Furthermore, since the units were connected via nozzles e and f, the distance t between the units became long, resulting in a large amount of dead space, which had the disadvantage of hindering the downsizing of the apparatus. Furthermore, in conventional equipment, when the container of a unit in which an accident has occurred is pulled forward for inspection, at least one nozzle stub f is extended and retracted to enable the container to be pulled out. After removing the coupling means between the nozzle e or f and the insulating spacer i, the extensible nozzle f is contracted to insulate it from the nozzle e or f. It is necessary to form at least a gap between the spacer and the spacer corresponding to the crushing allowance of the packing j (in the case of pulling out the container a, a gap corresponding to the protruding length of the insulating spacer i toward the nozzle e side). It was hot. Therefore, it was necessary to use an expensive bellows-like nozzle head f, which was uneconomical.

Purpose of the invention The purpose of the present invention is to provide a gas-insulated electrical equipment device that allows connections between units without using a nozzle stand and allows for easy withdrawal of containers.

Structure of the invention The present invention consists of a plurality of gas-insulated electrical equipment units that are configured by storing equipment in a sealed container filled with gas, and openings that are aligned with each other in the adjacent side walls of the containers of adjacent units. In a gas-insulated electric equipment device in which matching openings are provided with a container connecting portion and interconnected through a container connecting portion, the container connecting portion is improved. a pair of flanges each attached to the periphery of a mutually aligned opening of a matching container; an elastic container having an inner periphery hermetically joined to each of the flanges and an outer periphery hermetically joined to each other;
It consists of a pair of annular thin plates.

As described above, in the present invention, the container connecting portion is constituted by a pair of flanges and an annular thin plate whose inner periphery is joined to both flanges and whose outer periphery is joined to each other, and the flange of the container connecting portion is Since it is attached directly to the opening provided in the side wall of the container, containers of adjacent units can be connected without using a nozzle stand. Therefore, the gap between the containers can be reduced, and the size of the gas insulated electrical equipment can be reduced. In addition, the container connection part can be contracted in the axial direction at the thin plate part, so when it becomes necessary to inspect the inside of the container of each unit, remove the flange of the container connection part from the container that requires inspection, and then connect the container. By contracting the thin plate portion of the unit, a gap can be created between the flange and the container to which the flange was attached, and the container of each unit can be easily removed from the container of other units and pulled out. can. In this case, the container connection can be formed by simply welding a pair of thin plates to a pair of flanges;
The cost can be reduced compared to the case of using a bellows-like member.

The gas insulated electrical equipment device targeted by this invention is
Any structure may be used as long as it is constructed by arranging a plurality of gas-insulated electrical equipment units in which predetermined electrical equipment is housed in a closed container filled with an insulating gas. The equipment stored in each unit is, for example, equipment necessary to configure gas-insulated switchgear such as circuit breakers, disconnectors, grounding equipment, current transformers, cable heads, and transformers. The units do not necessarily have to have the same configuration, and the present invention also includes a case where units of different configurations are interconnected by the above-described structure.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 to 8.

Figure 3 shows a gas-insulated switchgear as an example of gas-insulated electrical equipment to which the present invention is applied, and in the figure, G1, G2, ... are rectangular parallelepiped-shaped sealed units filled with an insulating gas such as SF6 gas. This is a gas insulated switchgear unit configured by housing necessary equipment 100 in a container 1. In the container 1 of each unit, busbars BS,
Disconnector DS1, DS2, circuit breaker CB, grounding device ES1,
Equipment such as ES2 and cable head CH are housed together for three phases. In this gas insulated switchgear, containers 1, 1,... of units G1, G2,...
are formed into a substantially rectangular parallelepiped shape and are arranged side by side in the horizontal direction to form a row of panels, and the containers 1, 1 of adjacent units are connected to each other by a container connection part 2 to form a gas insulated switchgear. .

Referring to FIG. 5, an example of the configuration of the container connecting portion 2 used in the present invention is shown. In the same figure, 3,
Reference numerals 3 denote circular openings provided in adjacent side walls 1a, 1a of containers 1, 1 of adjacent units, respectively, and these openings 3, 3 are provided so as to be aligned with each other. In the case of a three-phase gas insulated switchgear, equipment for three phases is housed in each container 1 in one direction, but in this embodiment, the opening 3 is connected through the container connection part 2. Three of them are arranged in the same direction as the three-phase equipment. For example, in the example shown in Figure 1, if three-phase equipment is arranged in each container 1 in a direction perpendicular to the plane of the figure, three openings 3 are also arranged in a direction perpendicular to the plane of the figure. provided.

The container connection part 2 of the present invention is comprised of a pair of annular flanges 4, 4 and a pair of annular thin plates 5, 5. Each thin plate 5 is made of an elastic metal material, such as a thin steel plate, which is thin enough to withstand the gas pressure inside the container. The inner diameter is set approximately equal to the outer diameter of the flange 4. A pair of thin plates 5, 5 are arranged with their concave surfaces facing each other, and the inner circumferential portions of both thin plates form flanges 4, 4, respectively.
Welded to the outer periphery of the Further, the outer peripheral portions of the thin plates 5, 5 are hermetically joined to each other. In this embodiment, in order to facilitate deformation of the thin plates 5, 5, pleats are formed in the thin plates 5, 5, which consist of peaks m and valleys v that concentrically surround the flange 4.

The flanges 4, 4 of the container connection part are brought into contact with the outer surfaces of the peripheral parts of the openings 3, 3 of the adjacent side walls 1a, 1a of the containers 1, 1 of the adjacent units, and the inner surfaces of the peripheral parts of both openings 3, 3. Insulating spacers 6, 6 are in contact with each other.

Each insulating spacer 6 consists of a conductor support part 6a and a flange part 6b provided so as to surround the conductor support part 6a, and the conductors 7, 7 are supported by passing through the conductor support part 6a in an airtight manner. . Each insulating spacer 6 and a flange 4 facing each insulating spacer via the side wall 1a of the container are screwed into the flange 4 from inside the container 1 through the flange portion 6b of the insulating spacer 6 and the side wall 1a of the container. They are mutually fastened and fixed to the container 1 by bolts 8 . Gaskets 9 and 10 are placed in the grooves provided in the surface of each flange 4 facing the side wall of the container 1 and in the grooves provided in the surface of the flange portion 6b of the insulating spacer facing the side wall of the container, respectively.
are arranged, and the connection between the flange 4 and the periphery of the opening 3 and the connection between the insulating spacer 6 and the periphery of the opening 3 are kept airtight by both gaskets. A conductor connection part 11 is provided at one end of the conductors 7, 7 supported by the insulating spacers 6, 6 located outside the containers 1, 1 to connect the other conductor in a removable manner. When the conductors 7, 7 are attached to the periphery of the openings 3, 3 of the containers 1, 1, the conductors 7, 7 are connected to each other by the conductor connecting portion 11. When attached to the containers 1, 1, the conductors 7, 7 supported by both insulating spacers are connected to each other by a conductor connecting portion 11 so as to be removable.

As mentioned above, the conductors 7, 7 supported by the insulating spacers 6, 6 attached to the containers 1, 1, respectively, are connected to, for example, a predetermined device (bus conductor BS in this embodiment) housed in the container 1. They are connected by bolts 12, etc., thereby interconnecting the open/close circuits in the containers of adjacent units. Sho bolt 8
The tightening steps 1 and 12 are performed inside the container 1 by inserting a hand through a hand hole (not shown) provided in the container 1 for connecting the bus bar before filling the container 1 with gas. The container 1 of each unit is filled with SF6 gas at a pressure close to atmospheric pressure (at a pressure of 2 kg/m ² or less).

In the above embodiment, an opening may also be provided in the outer side wall 1a of the container 1 of the endmost units G1 and G3, and the opening may be hermetically closed by a cover plate. With this configuration, units can be easily added.

If the flanges 4, 4 of the container connection part 2, which is constructed by joining the thin plates 5, 5 to the flanges 4, 4 facing each other as in the above embodiment, are directly connected to the container 1, the containers 1, 1 Since the gap t between the units can be made smaller, the units can be arranged closer to each other than in the past, eliminating dead space and downsizing the device. In addition, if an accident occurs in any of the units and it becomes necessary to inspect or repair the unit, use the hand hole etc. provided in the container 1 of the unit that requires inspection to install the mounting bolts from the inside of the container 1. 8, the insulating spacer 6 and flange 4 attached to the container 1 are removed from the container 1, and after removing the bolt 12 and removing the conductor 7 from the bus bar BS, the conductor 7 is connected to the container of the adjacent unit. from the conductor 7 supported by the insulating spacer attached to the conductor 7. Thereby, the container 1 that requires inspection can be separated from the adjacent container and pulled out forward without opening the inside of the adjacent container 1.

In this case, when one flange 4 removed from the container 1 to be pulled out is pushed toward the other flange 4, the thin plate 5,
Since 5 is easily deformed, one flange 4 can be moved to the other flange side. When the flange 4 is moved in this way, the flange 4
Since a gap can be formed between the container 1 and the container 1 to be pulled out, the container 1 can be easily pulled out.

Note that the contours of the annular thin plates 5, 5 surrounding the flanges 4, 4 do not necessarily have to be circular, and may be formed in a rectangular or square shape.

After the inspection of the inside of the container 1 that has been pulled forward is completed, return the container 1 to its original position, place the flange 4 and insulating spacer 6 in contact with the periphery of the opening 3, and attach the insulating spacer to the flange 4 with bolts 8. Combine 6. After that, the conductor 7 supported by the insulating spacer 6
After connecting the bus bar BS to and closing the hand hole of the container 1, the container 1 is filled with gas and returned to the operating state.

In the above embodiment, the insulating spacer 6 that supports only one conductor 7 is used, and one insulating spacer is provided for each of the three phases. Spacers may also be used, in which case only one opening 3 in the side wall of each container is required.

In the above embodiment, a gas insulated switchgear is used as an example in which containers are separated and connected by an insulating spacer, but as shown in FIG. Adjacent side wall 1
The present invention can also be applied to gas-insulated electrical equipment in which the openings 3, 3 provided in the containers 1, 1a are connected to each other by the container connecting portion 2, and the devices in the containers 1, 1 are connected to each other by the conductor 13. can.

As in the above embodiment, if the thin plates 5, 5 are provided with pleats, the container connecting portion 2 can be easily expanded and contracted. However, if the amount of expansion and contraction of the container connecting portion does not need to be large , as shown in Figure 7,
It is also possible to use annular thin plates 5, 5 without pleats.

Effects of the Invention As described above, according to the present invention, the container connecting portion is constituted by a pair of flanges, and an annular thin plate whose inner circumferential portion is joined to both flanges and whose outer circumferential portions are joined to each other, Since the flange of the container connecting portion is attached directly to the opening provided in the side wall of the container, containers of adjacent units can be connected without using a nozzle stand. Therefore, the gap between the containers can be reduced, and the size of the gas-insulated electrical equipment can be reduced. In addition, the container connection part can be expanded and contracted in the axial direction using a thin plate.
When it becomes necessary to inspect the inside of the container of each unit, remove the flange of the container connection part from the container that requires inspection, and then shrink the thin plate part of the container connection part to ensure that the flange and the flange are attached. A gap can be created between the container and the container that was previously placed, making it easier to pull out the container that requires inspection. In this case, the container connection is connected to one pair of flanges.
Since it can be formed by simply welding a pair of thin plates, it has the advantage of lowering costs compared to the case where a bellows-shaped member is used.

[Brief explanation of drawings]

Fig. 1 is a front view schematically showing the configuration of a conventional gas insulated electrical equipment device, Fig. 2 is a sectional view showing the configuration of a container connection part in the conventional device, and Fig. 3 is an embodiment of the present invention. FIG. 4 is a single line diagram showing an example of the configuration of equipment stored in the container in the embodiment of FIG. 3, and FIG. FIGS. 6 and 7 are sectional views showing essential parts of the embodiment shown in the figure, and FIGS. 6 and 7 are sectional views showing essential parts of other different embodiments of the present invention, respectively. DESCRIPTION OF SYMBOLS 1... Container, 1a... Side wall of the container, 2... Container connection part, 3... Opening, 4... Flange, 6...
Insulating spacer, 6a...Main part of insulating spacer, 6
b...Flange part, 7...Conductor, 8...Mounting bolt, 9, 10...Packskin, G1, G2, G2
...Gas insulated switchgear unit (gas insulated electrical equipment unit), m...Mountain portion forming the pleat, v...
...the valleys that make up the folds.

Claims (1)

[Scope of utility model registration request] A plurality of gas-insulated electrical equipment units each consisting of equipment housed in a gas-filled airtight container are arranged side by side, and matching openings are provided in adjacent side walls of the containers of adjacent units to achieve alignment. In a gas-insulated electrical equipment device in which openings are interconnected via a container connection portion, the container connection portion includes a pair of flanges each attached to the periphery of the mutually aligned openings of the adjacent containers. A gas insulated electrical equipment device comprising: a pair of elastic annular thin plates having inner peripheral portions hermetically joined to both flanges and outer peripheral portions hermetically joining each other.