JP2000350316A - Bellows compressor for gas insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate compression work of a bellows by providing, on the outer circumference of each fixing flange thereof, with a pair of grasping means at least at three positions spaced apart with a constant interval while facing each other, coupling a drive means between the grasping means facing each other and then compressing the bellows in the axial direction. SOLUTION: A drive means 38 is set between fixing flanges 21, 22 by tightening fixing screws 32, 36 and bonding clampers 34, 37 to the fixing flanges 21, 22. The drive means 38 are disposed at three positions on the outer circumference of the fixing flanges 21, 22 at a specified interval. Pressure oil is then supplied to the supply hose 40 side by operating a drive source, e.g. a hydraulic pump, and a bellows 20 is compressed until the flange 21 abuts against a nut 24b. A gap is ensured between the bellows 20 and a tank as a work space. The work can be carried out with higher safety when a nut 24a is tightened until it abuts against the fixing flange 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-insulated switchgear in which a pair of tanks are connected by bellows and a pair of conductors arranged in each tank are connected by connecting members in the bellows. The present invention relates to a bellows compression device of a gas insulated switchgear that can be compressed to remove a connecting member from between a tank and a bellows.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing a main part of a general gas insulated switchgear, and FIG. 6 is a sectional view showing a main part of a bellows. 5 and 6, a pair of tanks 1 and 2 in which insulating gas is sealed are connected by an expandable and contractable bellows 3 having flanges 3a and 3b at respective ends. A pair of conductors 4 and 5 arranged in the tanks 1 and 2 are connected by a connection member 9 including an intermediate conductor 6, a sliding contact 7 and a detachable conductor 8. In addition, flanges 3a, 3b
By connecting the space with at least three tie rods 10 consisting of bolts 10a and nuts 10b and 10c,
The bellows 3 is prevented from moving over time due to the pressure of the insulating gas sealed in each of the tanks 1 and 2 and the bellows 3. A procedure for taking out the connecting member 9 in the bellows 3 in the gas insulated switchgear thus configured will be described. In FIG. 5, first, for example, the flange 3a side of the bellows 3 is separated from the tank 1. Then, the nut 10c of the tie rod 10 shown in FIG. Subsequently, the nut 10b is rotated with a spanner or the like to move the flange 3a until the flange 3a contacts the nut 10c. In this state, as shown in FIG. 7, each component of the connecting member 9 is sequentially taken out from a gap formed between the tank 1 and the bellows 3. Finally, the bellows 3 is separated from the tank 2 by separating the flange 3b of the bellows 3 from the tank 2 as shown in FIG.

[0003]

Since the bellows compression device of the conventional gas insulated switchgear is constructed as described above, the bellows 3 is compressed by rotating the nut 10b with a spanner or the like, and for example, the nut 10b is compressed. Pitch 5mm
If the clearance required for taking out each component part of the connection member 9 is 200 mm as the M48 coarse thread, the nut 10b must be rotated 40 times, so that it is difficult to improve the workability. There was a problem. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a bellows compression device of a gas insulated switchgear which can easily improve workability. .

[0004]

A bellows compression device for a gas insulated switchgear according to the present invention connects a pair of tanks filled with insulating gas with an extendable bellows having a mounting flange at each end. In a bellows compression device of a gas insulated switchgear, a pair of conductors arranged in each tank are connected by a connection member, and the bellows is compressed so that the connection member can be taken out from between the bellows and one of the tanks. A pair of grasping means that can be fixed to each of the mounting flanges of the bellows are arranged at at least three places on the outer periphery of each mounting flange at predetermined intervals so as to face each other, and a driving means is connected between the facing grasping means. The bellows is compressed in the axial direction. Further, one of the facing grasping means is fixed to the mounting flange, a mounting screw for fixing the clamper to the mounting flange, and the clamper is engaged with the clamper so as to be movable by a predetermined distance in the axial direction of the bellows. And an engagement member connected to the driving means.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view showing a main part of the first embodiment, and FIG. 2 is an explanatory view showing a state where the first embodiment is mounted on a gas insulated switchgear. 1 and 2, reference numerals 11 and 12 denote flanges 11a and 12a.
And a pair of cylindrical tanks having an insulating gas sealed therein and disposed on the same axis to face each other. Reference numerals 13 and 14 denote a pair of main conductors, which are arranged in the tanks 11 and 12, respectively. Reference numeral 15 denotes a connection flange fixed to the flange 11a of the tank 11, and reference numeral 16 denotes an insulating spacer supporting the main conductor 13, which is fixed to the connection flange 15 and
The insulating gas inside is sealed. 17 is an insulating spacer 16
Is a connection flange fixed to the flange 12a of the tank 12, and 19 is a connection flange fixed to the main conductor 14.
Is fixed to the connection flange 18 to seal the insulating gas in the tank 12.

Reference numeral 20 denotes an axially expandable and contractable bellows having mounting flanges 21 and 22 at each end.
The two mounting flanges 21 and 22 are arranged coaxially with the tanks 11 and 12 between the connection flanges 17 and 12, respectively.
An insulating gas is fixed to 18 so as to seal it. It should be noted that at least 3 at a predetermined interval
Through holes 21a and 22a are formed at the locations. Further, the same bellows 20 as the insulating gas in each of the tanks 11 and 12 is sealed. 23 is each through hole 21
The male screw 23a is formed by a tie rod penetrating the a and 22a. Numerals 24 a and 24 b are nuts screwed to the tie rod 23 and fix the tie rod 23 to the flange 21. Numerals 25a and 25b are screwed to the tie rod 23 and are nuts, which fix the tie rod 23 to the flange 22. 26 is a connecting member arranged in the bellows 20,
The main conductors 13 and 14 are electrically connected. In addition,
The connecting member 26 is constituted by the following 27-30. 27 is a detachable conductor detachably fixed to the conductor 13;
Reference numeral 28 denotes a sliding contact detachably fixed to the detachable conductor 27, reference numeral 29 denotes a sliding contact detachably fixed to the main conductor 14, and reference numeral 30 denotes an intermediate conductor, which connects between the sliding contacts 28 and 29. Connected.

A clamper 31 is fixed to the flange 21 and has a through hole 31a penetrating in the axial direction of the bellows 20. Reference numeral 32 denotes a mounting screw screwed to the clamper 31, which abuts on the flange 21 and fixes the clamper 31 to the flange 21. Reference numeral 33 denotes an engagement member slidably supported by the through hole 31a. The engagement members 33a, 33 are provided at each end so as to be movable by a predetermined distance in the axial direction of the bellows 20.
b is formed. In addition, the grasping means 34 in 31-33
Is configured. The grasping means 34 is arranged at at least three places on the outer periphery of the mounting flange 21 at predetermined intervals. A clamper 35 is fixed to the flange 22 and has a through hole 35a penetrating in the axial direction of the bellows 20. Reference numeral 36 denotes an attachment screw screwed to the clamper 35, which abuts on the flange 22 to fix the clamper 35 to the flange 22. It should be noted that the grasping means 37 is used in 35 and 36.
Is composed. And the grasping means 37 is the grasping means 34.
Are disposed at three locations at positions opposing each other.

Reference numeral 38 denotes drive means driven by air pressure, hydraulic pressure, or the like. A piston rod 38a is connected to the engaging member 33, and a cylinder 38b is connected to the clamper 35 with a mounting screw 39 passing through the through hole 35a. Reference numerals 40 and 41 denote supply hoses to which air pressure, hydraulic pressure and the like are supplied. Next, the operation will be described. FIG. 3 and FIG. 4 are explanatory diagrams showing the operation states of FIG. 1 and FIG. 1 to 4, the nut 24b is loosened before the gripping means 34 and 37 are fixed to the mounting flanges 21 and 22, respectively, and the bellows 20 is moved by a distance A to compress the bellows 20, as shown in FIG. Next, as shown in FIG. 3, the grasping means 34 and 37 are engaged with the mounting flanges 21 and 22, respectively. At this time, grasping means 3
The distance between each of the clampers 31, 35 and each of the flanges 21, 22 is adjusted by sliding the clamper 31 of No. 4 and the engaging member 33.

Subsequently, by fastening the mounting screws 32 and 36 to fix the clampers 34 and 37 to the mounting flanges 21 and 22, the driving means 38 is connected to the mounting flanges 21 and 22, respectively.
It can be set between 22. In this way, for example, three driving means 38 are arranged at predetermined intervals on the outer periphery of the mounting flanges 21 and 22. Then, a drive source (not shown) such as a hydraulic pump is operated to supply pressure oil to the supply hose 40 side, and the bellows 20 is compressed as shown in FIG. 4 until the flange 21 contacts the nut 24b. Thereby, the gap B formed between the bellows 20 and the tank 11 is formed.
As a working space. Here, nut 24a
If screwed in until it contacts the mounting flange 21,
Work can be performed more safely. In this state, the detachable conductor 27 is separated and taken out from the main conductor 13 and the sliding contact 28, and then the sliding contact 28 and the intermediate conductor 30 are taken out sequentially. Further, the sliding contact 29 is connected to the main conductor 14.
And take it out. Finally, the bellows 2 are separated by separating the mounting flange 22 and the connection flange 18.
0 is taken out from between the tanks 11 and 12.

As described above, the pair of grasping means 34, 37
The driving means 38 connected between the bellows 20 is disposed at at least three places facing each other between the mounting flanges 21 and 22 of the bellows 20, and the bellows 20 is compressed by the driving means 38. It can be carried out. In the first embodiment, the piston rod 38a
Has been described in connection with the clamper 31 via the engaging member 33 which can be moved by a predetermined distance in the axial direction of the bellows 20, but the piston rod 38a may be directly connected to the clamper 31. Thus, the cylinder 38a
With the pressure oil in the inside released to the atmospheric pressure, each clamper 31,
The same effect can be expected by adjusting the distance between 35 and each of the flanges 21 and 22. Furthermore, although the description has been given of the case where the driving means 38 is operated with pressure oil, the same effect can be expected even if the driving means 38 is operated with compressed air or electric power.

[0011]

According to the present invention, the driving means connected between the pair of grasping means is arranged at at least three places facing each other between the mounting flanges of the bellows, and the bellows is compressed by the driving means. The operation of compressing the bellows can be easily performed. Further, a clamper for fixing the grasping means to the mounting flange, a mounting screw for fixing the clamper to the mounting flange, and a driving means engaged with the clamper so as to be movable by a predetermined distance in the axial direction of the bellows. With this configuration, the distance between each clamper and each flange can be adjusted, so that the mounting of the driving means can be easily performed.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state where the first embodiment is mounted on a gas insulated switchgear.

FIG. 3 is an explanatory diagram showing an operation state of FIGS. 1 and 2;

FIG. 4 is an explanatory diagram showing an operation state of FIGS. 1 and 2;

FIG. 5 is a sectional view showing a main part of a general gas insulated switchgear.

FIG. 6 is a sectional view showing a main part of a conventional bellows.

FIG. 7 is an explanatory view showing removal of a connecting member in a state where a conventional bellows is compressed.

FIG. 8 is an explanatory view showing removal of a bellows in a state where a conventional bellows is compressed.

[Explanation of symbols]

11, 12 tank, 13, 14 main conductor, 20 bellows, 21, 22 flange, 26 connecting member, 31,
35 clamper, 32, 36 mounting screw, 33 engaging member, 34, 37 grasping means, 38 driving means.

Claims (2)

[Claims] 1. A pair of tanks filled with insulating gas are connected by an extendable bellows having a mounting flange at each end, and a pair of conductors arranged in each tank are connected by a connecting member. A bellows compression device of a gas insulated switchgear which compresses the bellows so that the connection member can be taken out from between the bellows and one of the tanks; The gripping means are arranged at at least three places on the outer periphery of the mounting flanges at predetermined intervals so as to face each other, and a driving means is connected between the facing gripping means to compress the bellows in the axial direction. A bellows compression device for a gas insulated switchgear, characterized in that: 2. An opposing grasping means includes a clamper fixed to a mounting flange, a mounting screw fixing the clamper to the mounting flange, and a mounting screw fixed to the mounting flange so as to be movable by a predetermined distance in the axial direction of the bellows. The bellows compression device for a gas insulated switchgear according to claim 1, further comprising an engagement member engaged with the clamper and connected to the driving means.