JPH11318011A - Capsule device of gas-insulated high voltage switchgear with compensating element - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the structural length of the compensation element of a capsule device which has the compensation element between two capsule blocks. SOLUTION: A tie-rod 6 attached to a compensation element is fixed to two connection flanges 22 and 31 adjacent to both capsule block. The dimension of the compensation element 4, including fixing flanges 41 and 42, is reduced in accordance with a compensation function, so that the axial direction length (a) of the compensation element 4 can be same as the axial direction length of the fixing flange 51 of an insulator 5, which is normally attached to capsule blocks 2 and 3. With this constitution, the capsule components of the individual switchgear units of a high voltage switchgear can be placed at the centers of the center planes of the switchgear units.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of electric power distribution, comprising a capsule device consisting of two capsule blocks, between which a compensating element in the form of a telescopic bellows or a sliding piece is arranged. Applied to gas-insulated high-pressure equipment, especially high-pressure switching equipment.

[0002]

2. Description of the Prior Art It is known in capsule-type gas-insulated high-pressure installations to use compensating elements to compensate for thermal expansion between different sections of the installation. Telescopic bellows used for this purpose (German Patent Application No. 3
No. 546011) or a sliding piece (cf. German Patent Application Nos. 2,603,040 and 2,364,600)
Are also used, especially in the middle of the bus, but also in switchgear units in high-pressure switchgear, and are arranged between two capsule blocks, whereby both fixing flanges of the compensating element are connected to both capsule blocks. It is airtightly connected to the connecting flanges facing each other. In that case, the compensating element needs to be provided with a tie rod for receiving the gas pressure of the switchgear. Such a tie rod is provided by the two fixing flanges of the compensating element (EP-A-0537868, Sprecher + Schuh D).
EZ "B212, new SF6 for 72.5 to 170kV
Opening / closing equipment module system "printing number 13.041d
/9.81/1/1, FIG. 6) or, in the case of a relatively large compensation length, on the flange of the compensation element and on the further away flange of the capsule block. For this purpose, such fixing flanges are provided with lug-shaped additional pieces.

[0003]

The object of the present invention is based on a capsule device having the features of the preamble of claim 1 and which is designed such that the compensating element has the shortest possible structural length. Is to do.

[0004]

According to the present invention, a tie rod attached to a compensating element extends over the compensating element to form both adjacent connections of both capsule blocks. It is fixed to the flange.

When the capsule device is configured in this manner,
The fixing flange of the compensating element can have a relatively small wall thickness, since it no longer needs to be dimensioned for loads due to tie rods. Also, the length of the compensating element does not need to take into account the required structural length of the tie rod. This length can be taken into account by appropriate measures in the region of the connecting flanges of both capsule blocks. Thus, the axial length of the compensating element can be reduced to the maximum required length only for axial compensation. Experiments have shown that this axial length is usually used to support phase conductors between flanges of adjacent capsule blocks in high-pressure installations, and also for the partitioning between switchgear units and between parts of one switchgear unit. Therefore, it can be reduced to the extent corresponding to the axial width of the fixed flange of the disk-shaped insulator as arranged. A row of buses connected to the circuit breaker of the high-voltage switchgear via a T-shaped or cross-shaped block, wherein the T-shaped or cross-shaped block is provided with a disk-shaped insulator on one side and a compensating element on the other Therefore, the T-shaped or cross-shaped block is configured symmetrically with respect to the connection flange led to the circuit breaker, and the center plane of the components arranged in the longitudinal direction of the switchgear equipment unit coincides with the center plane of the switchgear equipment unit. You can make it. This makes it possible to make optimal use of the pitch of the switching equipment unit.

As short compensating elements, for example, elastic bellows having, for example, only two corrugations are considered. The two fixing flanges are then loosely arranged at the ends of the bellows and, in the assembled state, these ends are inserted into a capsule container or a plurality of adjacent capsule containers by inserting a sealing ring therebetween. It can be pressed against the connection flange of the plate insulator. In this configuration, a tubular arc protection device for the telescopic bellows can be provided by providing it with a connecting flange welded to one end of the telescopic bellows.

The compensating element also takes into account a sliding piece formed of two parts. In this case, each part of the slide piece consists of a short tube with a fixed flange, both short tubes overlapping with a sealing ring inserted between them.

A capsule block having a compensating element on one connection side usually comprises an insulator for holding a current-carrying part on the other connection flange. The invention makes it possible to provide the compensating element with the same axial length as the fixing flange of the insulator, so that the individual capsule blocks, with respect to their axial dimensions, including the insulator and the compensating element, with respect to the central plane. It can be configured symmetrically.

[0009]

1 to 6 show an embodiment of the present invention. FIG. 1 is a diagram showing a bus bar portion of a high-pressure switchgear.
Device 1 comprising two capsule blocks 2 and 3
Is shown. These capsule blocks are for accommodating a combination of a disconnector and a grounding device for a three-phase capsule-type opening / closing facility. Each capsule block has a first connecting flange 21, 31 and a second connecting flange 22, 32, respectively, and a third connecting flange 23, 33 for connection to other equipment parts. Further, each capsule block is provided with a disk-shaped partition wall insulator 5 on one of the connection flanges 21 and 31 and a compensation element 4 on the other connection flanges 22 and 32. Therefore, connection flange 2
Between 2 and 31, the compensating element 4 and the bulkhead insulator 5 are arranged side by side.

In FIG. 2, the connecting flanges 22 and 31 of both capsule blocks are provided with lug-like projections 24 and 34, respectively, to which the tie rod 6 is fixed. Such a tie rod, configured in a known manner,
A plurality are arranged around the flanges 22 and 31. These tie rods project over the compensation element 4 and are not directly connected thereto. Therefore, the fixing flanges 41 and 42 of the compensating element 4 should be small or particularly thin with respect to the wall thickness of the compensating element 4 so as to perform the function of sealingly connecting the telescopic bellows 47 to the fixing flange 31 and the end face of the partition wall insulator 5. Can be. For this purpose, a corresponding sealing ring 43 is provided. When the compensating element is configured in this way, the fixing flanges 41, 42 can be loosely arranged with respect to the telescopic bellows 47.

By configuring the connecting portion between the two capsule blocks 2 and 3 in this way, the axial length a of the compensating element 4 is reduced to the axial length of the flange 51 of the partition insulator 5. can do.

In FIG. 3, the compensating element 4 includes an arc protection device 4 having a substantially cylindrical shape and having a fixing flange 45.
4 is attached. The fixing flange 45 is hermetically welded on its outer periphery to a corresponding peripheral portion of the telescopic bellows 47. In order to receive this fixing flange, the fixing flange 41 originally provided on the compensating element 4 is formed slightly thicker and has a corresponding notch 46.

In FIG. 4, the compensating element 4 is provided without a partition insulator, on both fixing flanges 22 of the two capsule blocks.
And 31 are arranged. Since the fixing flanges 22 and 31 are then arranged at very short intervals, the tie rods 61 need to be constructed such that the spring elements 62, 63 are axially divided and arranged on both sides of the flange 22. is there.

FIG. 5 shows an arrangement similar to that of FIG. 2, except that the compensation element 7 is formed as a sliding piece. The slide piece is provided for this purpose with two parts, each consisting of a short pipe section 71, 73 followed by a fixing flange 72, 74. The two short tubes overlap each other in a nested manner with a sealing ring 75 inserted therebetween.

FIG. 6 shows schematically two switchgear units of a high-pressure switchgear which are arranged in parallel with one another and are connected to one another via a capsule device 1 according to FIG. Each switchgear installation unit comprises, in particular, capsule blocks 2 and 3, a circuit breaker 81 with a current transformer block 82 and an outlet-side disconnect switch block 83. The pitch f of the switching equipment unit is shown for such a switching equipment unit configuration.
Since all the components of the switchgear unit, in particular the capsule blocks 2 and 3, are also arranged symmetrically with respect to the vertical center plane M, the central axis A of the switchgear unit also overlaps this center plane M. For this purpose, the switching equipment unit 8
The symmetrical configuration of the capsule block 2 having the dimension b and the symmetrical arrangement of the compensating element 4 and the disk-shaped partition insulator 5 having the dimension a are shown.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a capsule device including two capsule blocks, each of which is provided with a disk-shaped insulator and a compensation element.

2 shows a partial view of the connection between two capsule blocks according to FIG. 1;

FIG. 3 shows a structural variant according to FIG. 2 additionally provided with an arc protection device for the telescopic bellows.

FIG. 4 is a connection partial view of two capsule blocks where no insulator is arranged.

FIG. 5 is a modified connection partial view using a sliding piece as a compensation element.

FIG. 6 is a configuration diagram of two switching equipment units of the high-pressure switching equipment by the capsule device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Capsule device 2, 3 Capsule block 4, 7 Compensation element 5 Partition insulator 6 Tie rod 8, 9 Opening / closing equipment unit 22, 31 Connection flange 41, 42 Fixed flange 51 Fixed flange a Axial length of compensation element f Opening / closing equipment unit Pitch M Center plane of switchgear unit A Central axis of switchgear unit

Claims (8)

[Claims] The invention relates to two tubular capsule blocks which are arranged axially next to one another and are each provided with a connection flange on each side in the axial direction, the two connection flanges of both capsule blocks facing each other. In a capsule device of an insulated high-pressure switchgear, in which a compensating element having a fixed flange is arranged and a plurality of tie rods are distributed around the compensating element, a tie rod (4) attached to the compensating element (4) is provided. 6) overhangs the fixed flange of this compensating element and the two adjacent connecting flanges (22, 3) of both capsule blocks (2, 3).
A capsule device for gas-insulated high-pressure switchgear, which is fixed to 1). 2. A compensating element (4) in the form of a telescopic bellows, with fixed flanges (41, 42) of said compensating element (4).
The capsule device according to claim 1, characterized in that the capsule device is formed as an annular flange loosely in contact with the flange-shaped end of the telescopic bellows (47). 3. The telescopic bellows (47) is provided with a tubular arc protection device (44) having a fixed flange (45) welded to one end thereof. Capsule device. 4. A short tube section (71, 73) comprising a compensation element (7) in the form of a two-piece slide piece, each part of which has a fixed flange (72, 74). 2. The tubing of claim 1, wherein the two short tubes are nested with a sealing ring (75) inserted therebetween.
A capsule device as described. 5. A fixing flange (51) for a disk-shaped insulator (5) is additionally arranged between both connecting flanges (22, 31) of the capsule block (2, 3). The capsule device according to any one of claims 1 to 4. 6. Capsule device according to claim 5, wherein the compensating element (4) and the fixing flange (51) of the insulator (5) have the same axial length (a). 7. Each capsule block (2, 3) is composed of two other capsule blocks.
7. The connection flange according to claim 6, further comprising a T-shaped connection flange arranged centrally with respect to one of the connection flanges.
A capsule device as described. 8. A plurality of switchgear equipment units (8, 9) arranged side by side, and a bus bar extending at a predetermined pitch (f) for each switchgear equipment unit in a direction perpendicular to the switchgear equipment unit. A plurality of components such as a capsule block (2, 3), a circuit breaker (81) provided with a current transformer block (81), and a disconnector / grounding device block (83) provided on the outlet side are the components. In a capsule-type high-pressure switchgear arranged along a central plane (M), a capsule device (1) according to claim 7 is characterized in that the busbar capsule blocks (2, 2) of two adjacent switchgear units (8, 9).
Capsule-type high-pressure opening / closing equipment characterized by forming 3).