JP2002142340A - Gas-insulated detachable installation of bus-bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components and at the same time, to provide a gas insulated detachable installation of bus-bar in a compact in entire device with improved economy. SOLUTION: Sealing materials 11 and 12 are fitted to at least two sealing grooves provided inside a tank flange 2b, and are brought into contact with the outer-periphery surface of a pipe 6, when the pipe 6 is inserted into the inside of the tank flange 2b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated detachable bus device in which a conductor for connecting a gas insulated switchgear used in, for example, power receiving equipment is detachable.

[0002]

In general, gas insulated switchgear housing a switchgear in a metal tank which is grounded, is obtained by filling an insulating excellent insulating gas such as SF ₆ gas, is exposed to the charging unit There is an advantage that the required space can be reduced because there is no power supply, and it is widely used as substation equipment.

On the other hand, in an electric station such as a power plant or a substation, a gas-insulated detachable bus device is provided in order to remove main devices such as a circuit breaker, a disconnector, and a grounding switch in an accident. In addition, a gas-insulated detachable bus device is provided for line transfer or line addition. The gas-insulated detachable bus device is a bus that separates, for example, a failed circuit from a main circuit by shrinking a bellows-type or slide-type extendable metal container and removing a detachable conductor that is a part of an internal conductor.

FIG. 6 is a partially cutaway sectional view of a conventional gas-insulated detachable bus device. The busbar 1 is configured such that a conductor 4 is insulated and supported by an insulating spacer 3 in a tank 1a filled with an insulating gas, and is inserted therethrough. The busbar 2 has three-phase connecting conductors 8 and 9 each having an attaching / detaching device 5 attached to a tank 2 a filled with an insulating gas and insulated and supported by an insulating spacer 3.
A detachable conductor 10 is provided between 9.

The attachment / detachment device 5 includes a pipe 6 having a pipe flange 6a and a flange 7, and a stud 13 penetrating the tank flange 2b of the tank 2a is provided with a flange 6.
a and is fixed with a nut 14. On the other hand, nuts 15 and 16 are mounted on both sides of the stud 13 penetrating the tank flange 2b, and the gas-side sealing material 11 and the atmosphere-side sealing material 12 mounted inside the tank flange 2b are fixed.

FIG. 7 shows the connecting conductors 8 and 9 by the attaching / detaching device 5.
It is explanatory drawing of the process of removing. The nut 15 attached to the stud 13 penetrating the tank flange 2b of the tank 2a is loosened, and the other nut 16 is screwed. Thereby, the stud 13 moves to the left of the drawing, and the stud 13
The pipe flange 6a into which the stud 1 is screwed
3 and to the left of the drawing. And stud 13
The bolt of the detachable conductor 10 is removed from the opening 17 formed by the movement, and the detachable conductor 10 is removed.

At this time, the flange 7 is connected to the tank flange 2
b, the attachment / detachment device 5 is contracted by the predetermined value L. Further, since the pipe 6, which is a telescopic container, is used, the installation dimensions of the equipment can be adjusted.

[0008]

However, such a detachable bus device requires a flange 7 for tightening and managing the atmosphere-side sealing member 12, which hinders a reduction in the overall size of the gas insulated switchgear. There was a problem in economics.

An object of the present invention is to provide a gas insulated detachable bus device which is reduced in the number of parts, is reduced in size as a whole, and is excellent in economy.

[0010]

According to a first aspect of the present invention, there is provided a gas insulated detachable bus device, comprising: a tank in which an insulating gas is sealed; a tank flange provided at an end of the tank; A pipe that slides inside the pipe, a pipe flange that is provided at an end of the pipe and abuts a bus bar, a stud that connects the tank flange and the pipe flange and slides the pipe, and a portion that is covered with the pipe. A detachable conductor for detachably connecting a conductor, a gas-insulated detachable bus device that slides the pipe with the stud to detach and attach the detachable conductor inside the tank when attaching and detaching the busbar; At least two sealing grooves provided on the inner side, and the pipe mounted on the sealing groove is provided on the tank flange. Characterized by comprising an outer circumferential surface abutting the sealing material of the pipe when inserted into the side.

In the gas-insulated detachable bus device according to the first aspect of the present invention, a sealing material is mounted in at least two sealing grooves provided inside the tank flange. This sealing material comes into contact with the outer peripheral surface of the pipe when the pipe is inserted inside the tank flange.

According to a second aspect of the present invention, in the gas insulated detachable bus device according to the first aspect, the outer periphery of the pipe is in contact with the sealing material in a state where the pipe flange is connected to the insulating space by the stud. The outer diameter of the surface is formed to be larger than the outer diameter of the other outer peripheral surface.

In the gas-insulated detachable bus device according to the second aspect of the present invention, in addition to the operation of the first aspect, when the pipe is contracted and removed from the connected state, the inside of the tank flange is relatively located on the pipe flange side. And move in the direction in which the outer diameter of the pipe is smaller. Further, to change the pipe from the extended state to the connected state, the inside of the tank flange moves from the smaller outer diameter of the pipe to the larger outer diameter. Therefore, the expansion / contraction operation of the attachment / detachment device becomes easy.

According to a third aspect of the present invention, in the gas insulated detachable bus device according to the first aspect, an inner diameter of a portion of the tank flange exposed to the insulating gas is larger than inner diameters of other tank flange portions. It is characterized by having been formed.

In the gas insulated detachable bus device according to the third aspect of the present invention, in addition to the operation of the first aspect, when the pipe is contracted and removed from the connected state, the end of the pipe has a relatively small inner diameter. It moves inside the part of the tank flange exposed to the insulating gas. To change the pipe from the extended detached state to the connected state, the end of the pipe moves inside the tank flange having a relatively large inner diameter. Therefore, the expansion / contraction operation of the attachment / detachment device becomes easy.

According to a fourth aspect of the present invention, there is provided a gas-insulated detachable bus device according to any one of the first to third aspects, wherein at least one sealing material except for the sealing material disposed on the insulating gas side is used. It is characterized by applying a conductive material.

In the gas insulated detachable bus device according to the fourth aspect of the present invention, in addition to the operation of any one of the first to third aspects, the gas is generated in the gas insulated switchgear by the conductive sealing material. Prevents flashover due to high frequency surge.

According to a fifth aspect of the present invention, there is provided a gas-insulated detachable bus device according to any one of the first to third aspects, wherein the tank flange and the pipe have conductivity at an atmospheric side corner. The paint is applied.

In the gas insulated detachable bus device according to a fifth aspect of the present invention, in addition to the function of any one of the first to third aspects of the present invention, the gas is applied to the atmosphere side corner of the tank flange and the pipe. The conductive paint prevents flashover due to high-frequency surge generated in the gas-insulated switchgear.

[0020]

Embodiments of the present invention will be described below. FIG. 1 is a partially cutaway sectional view of a gas-insulated detachable bus device according to a first embodiment of the present invention.

The bus 1 is formed by enclosing an insulating gas in a tank 1a and housing a conductor 4. An insulating spacer 3 is provided at an end of the busbar 1, and the conductor 4 is insulated and supported by the insulating spacer 3, and the conductor 4 is inserted therethrough.

The bus 2 has a tank 2a filled with an insulating gas, a detachable device 5 is attached to the tank 2a, and a three-phase connecting conductor 8 insulated and supported by an insulating spacer 3 and a connecting conductor inside the tank 2a. 9 are connected by a detachable conductor 10.

The attachment / detachment device 5 includes a pipe 6 having a pipe flange 6a.
A stud 13 penetrating through b is screwed into the flange 6 a and fixed with a nut 14. On the other hand, nuts 15 and 16 are provided on both sides of the stud 13 penetrating the tank flange 2b.
Is attached.

Two sealing grooves are provided inside the tank flange 2b, and a gas-side sealing material 11 and an atmosphere-side sealing material 12 are mounted in the sealing grooves, respectively.
Then, the gas side sealing material 11 and the atmosphere side sealing material 12
The pipe 6 is inserted so as to be in contact with.

The attachment and detachment of the gas-insulated detachable bus device of the first embodiment is performed as follows. That is,
As shown in FIG. 2, the pipe 6 of the attaching / detaching device 5 is contracted by a predetermined value L to form an opening 17, and a tool is inserted through the opening 17 to loosen the bolt of the detachable conductor 10. Thus, the detachable conductor 10 is removed, and the bus 2 is removed from the bus 1.

As described above, according to the first embodiment, at least two sealing grooves are provided inside the tank flange 2b of the tank 2a, and the gas-side sealing material 11 and the atmosphere side are provided in the sealing grooves. Since the seal member 12 is provided, the flange 7 for tightening and managing the atmosphere-side seal member 12 is not required, and an increase in the required space caused by the attachment of the flange 7 can be prevented.
Further, since the flange 7 is not required, the cost is reduced.

Next, a second embodiment of the present invention will be described. FIG. 3 is a partially cutaway sectional view of a gas-insulated detachable bus device according to a second embodiment of the present invention. The second embodiment is different from the first embodiment shown in FIG. 1 in that the gas flange seal member 11 and the air seal member 11 are connected with the pipe flange 6b connected to the insulating space 3 by the studs 13. The outer diameter D1 of the outer peripheral surface of the pipe 6 in contact with the pipe 12 is formed larger than the outer diameter D2 of the other outer peripheral surface. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and overlapping descriptions will be omitted.

FIG. 3 shows a state in which the bus 1 and the bus 2 are connected. Outer diameter D1 of tip of pipe 6 in contact with gas-side sealing material 11 and atmosphere-side sealing material 12
Is formed larger than the outer diameter D2 of the other portion.

When the pipe 6 is contracted and removed from this connected state, the inside of the tank flange 2b is stud 13
As a result, the pipe 6 relatively moves toward the pipe flange 6a, and moves in a direction in which the outer diameter of the pipe 6 decreases. On the other hand, to change the pipe 6 from the extended detached state to the connected state, the inside of the tank flange 2b moves from the smaller outer diameter of the pipe 6 to the larger one. Therefore, since the expansion / contraction operation of the attachment / detachment device 5 is facilitated, the attachment / detachment operation is facilitated and the operation time can be reduced.

According to the second embodiment, the outer diameter D2 of the other parts of the pipe 6 to be inserted is smaller than the outer diameter D1 of the other parts in contact with the sealing members 11 and 12, so that The telescopic operation is facilitated, and the bus can be removed with a short work.

Next, a third embodiment of the present invention will be described. FIG. 4 is a partially cutaway sectional view of a gas-insulated detachable bus device according to a third embodiment of the present invention. The third embodiment is different from the first embodiment shown in FIG. 1 in that the inner diameter d1 of the portion of the tank flange 2b exposed to the insulating gas is different from that of the first embodiment shown in FIG.
Is formed larger than the inner diameter d2 of the other tank flange 2b. Other configurations are the same as those of the first embodiment shown in FIG. 1, and therefore, the same components are denoted by the same reference symbols and overlapping descriptions will be omitted.

FIG. 4 shows a state in which the bus 1 and the bus 2 are connected. The inner diameter d1 of a portion of the inner diameter of the tank flange 2b exposed to the insulating gas is formed larger than the inner diameter d2 of the other portions.

When the pipe 6 is contracted and removed from the connected state, the tip of the pipe 6 moves to a portion of the tank flange 2b having a relatively small inner diameter exposed to the insulating gas.
On the other hand, when the pipe 6 is changed from the extended detached state to the connected state, the distal end of the pipe 6 moves to the inside of the tank flange 2b having a relatively large inner diameter. Therefore, the expansion / contraction operation of the attachment / detachment device becomes easy.

According to the third embodiment, the installation dimensions of the gas-insulated detachable bus device can be easily adjusted.
Can be easily extended and retracted. Therefore, the bus can be removed in a short time. Further, with respect to the deflection of the pipe 6 during the attaching / detaching operation, the inner wall of the tank flange 2b and the pipe 6
The outer wall does not interfere with each other, and the generation of metal foreign matter can be suppressed.

Here, in each of the above embodiments, it is also possible to apply a conductive material to the atmosphere-side sealing material 12. That is, a conductive material is applied to at least one sealing material except for the sealing material arranged on the gas side. This is to prevent a sliding type gas insulated detachable bus device from having a surge surge impedance discontinuous and causing a flashover due to a high frequency surge generated in the gas insulated switchgear. . Thus, flashover due to high-frequency surge generated in the gas insulated switchgear can be prevented, and a highly reliable gas insulated detachable bus device can be provided.

Next, a fourth embodiment of the present invention will be described. FIG. 5 is a partially cutaway sectional view of a gas-insulated detachable bus device according to a fourth embodiment of the present invention. The fourth embodiment is different from the first embodiment shown in FIG. 1 in that a paint 18 having conductivity is applied to the atmosphere side corner of the tank flange 2b and the pipe 6. Other configurations are
Since the configuration is the same as that of the first embodiment shown in FIG. 1, the same components are denoted by the same reference numerals, and redundant description is omitted.

FIG. 5 shows a state in which the bus 1 and the bus 2 are connected. In this connection state, a paint 18 having conductivity is applied to the corner on the atmosphere side between the tank flange 2b of the tank 2a and the pipe 6. Thus, flashover due to high-frequency surge generated in the gas insulated switchgear can be prevented, and a highly reliable gas insulated detachable bus device can be provided.

[0038]

As described above, according to the present invention, the entire apparatus can be reduced in size, and the installation area and the building volume can be reduced. Further, since the conductor can be easily attached and detached, a gas-insulated detachable bus device that can reduce the stop time of the gas-insulated switchgear can be provided.

[Brief description of the drawings]

FIG. 1 is a partially cutaway cross-sectional view of a gas-insulated detachable bus device according to a first embodiment of the present invention.

FIG. 2 is a partially cut-away cross-sectional view when the gas-insulated detachable bus device according to the first embodiment of the present invention is attached and detached.

FIG. 3 is a partially cutaway cross-sectional view of a gas-insulated detachable bus device according to a second embodiment of the present invention.

FIG. 4 is a partially cutaway cross-sectional view of a gas-insulated detachable bus device according to a third embodiment of the present invention.

FIG. 5 is a partially cutaway sectional view of a gas-insulated detachable bus device according to a fourth embodiment of the present invention.

FIG. 6 is a partially cutaway sectional view of a conventional gas-insulated detachable bus device.

FIG. 7 is a partially cutaway cross-sectional view of a conventional gas-insulated detachable bus device when detached.

[Explanation of symbols]

1, 2, bus bar, 1a, 1b tank, 2b tank flange, 3 insulating spacer, 4, 8, 9 conductor, 5 attachment / detachment device, 6 pipe, 6a pipe flange, 7 flange, 10 Detachable conductors, 11 and 12 sealing materials, 13 studs, 14, 15, 16 nuts, 17 openings, 1
8 ... paint

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kiyomi Abe 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Masahiro Ushizawa No. 2, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. 1 F-term in Toshiba Hamakawasaki Plant (reference) 5G017 FF08 5G365 DH10 DJ02

Claims (5)

[Claims] 1. A tank having an insulating gas sealed therein.
A tank flange provided at an end of the tank, a pipe sliding inside the tank flange, a pipe flange provided at an end of the pipe and abutting on a bus bar, and connecting the tank flange and the pipe flange. A stud for sliding the pipe, and a detachable conductor for detachably connecting a conductor of a portion covered by the pipe. When attaching and detaching a bus bar, the stud slides the pipe to attach and detach the inside of the tank. In a gas-insulated detachable bus device for attaching and detaching conductors, at least two sealing grooves provided inside the tank flange, and when the pipe is inserted into the tank flange and mounted in the sealing groove. A gas-insulated detachable bus device, comprising: a sealing member that contacts an outer peripheral surface of the pipe. 2. An outer diameter of an outer peripheral surface of the pipe which is in contact with the sealing material in a state where the pipe flange is connected to the insulating space by the stud, is formed to be larger than an outer diameter of other outer peripheral surfaces. Claim 1 characterized by the following:
3. The gas-insulated detachable bus device according to claim 1. 3. The gas-insulated detachable bus device according to claim 1, wherein an inner diameter of a portion of the tank flange exposed to the insulating gas is formed larger than an inner diameter of the other portion. 4. The method according to claim 1, wherein a material having conductivity is applied to at least one sealing material except for the sealing material disposed on the insulating gas side. Gas insulated detachable busbar device. 5. The gas-insulated detachable bus according to claim 1, wherein a conductive paint is applied to an atmospheric side corner of the tank flange and the pipe. apparatus.