JPH10164711A - Plate body fitting device of gas insulated switch gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of a gas insulated witch gear by providing a reinforcing body which is formed into an annular shape in parallel to the opening peripheral end part of a fitting plate back surface, and whose peripheral end part is weld-fixed in a gas-tight condition at its back surface. SOLUTION: An opening 16 is formed at a fitting plate 25 with small plate thickness of a gas container 1, where a plate body 18 is applied to its peripheral end part through a packing 20. Bolts 22 inserted in respective through-holes 21 of the plate body 18 is screwed in a plurality of threaded holes 26 formed by being penetrated into the peripheral end part of the opening 16, whose front end part is guided inward from the fitting plate 25, so that the plate body 18 is fitted onto the fitting plate 25. A reinforcing plate 27 of U-shaped cross-section which is formed by bending both sides of a long plate, is formed into an annular shape in parallel to both the sides, and the upper and lower parts of the peripheral end part of the opening 16 at the back surface of the fitting plate 25 with both the ends of it being blocked by end plates. The peripheral end part of the reinforcing body 27 is weld-fixed at the back surface of the fitting plate 25 in a gas-tight condition by covering the front end parts of respective bolts 22, so that the connecting part of the reinforcing plate 27 is weld- fixed in a gas-tight condition. It is thus possible to reduce the weight of a gas insulated switch gear by reducing the thickness of the fitting plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate mounting device for a gas insulated switchgear which closes an opening of a mounting plate of a gas container with a plate such as a device mounting plate or a cover plate.

[0002]

2. Description of the Related Art First, a gas container of a conventional gas insulated switchgear will be described with reference to FIG. In the figure, 1 is a gas container of a gas insulated switchgear which gas chamber 2 formed therein, an insulating gas such as SF ₆ is sealed. Reference numerals 3, 4, and 5 denote a bottom plate, a ceiling plate, and a side plate of the container 1, 6 denotes a thick mounting plate in front of the container 1, 7 denotes terminal plates provided on both sides of an upper portion of the mounting plate 6, and 8 denotes both terminals. 3-phase cable bushings juxtaposed below the plate 7, 9
Are circuit breakers provided on both sides below each bushing via a device mounting plate 10.

[0003] Reference numeral 11 denotes a disconnector provided in the container 1;
Is a work lid plate mounted below both circuit breakers 9 of the mounting plate 6, 13 is a three-phase bushing bushing arranged side by side on the lower side of the mounting plate 6, 14 is a conductor, and a cable bushing 8, between the circuit breakers 9, between the circuit breakers 9, the disconnecting switches 11 and between the disconnecting switches 11 and the busbar bushing 13. 1
Reference numeral 5 denotes an air charge valve provided below the mounting plate 6.

[0006] Next, the plate body mounting device will be described with reference to FIG. 6B which is an enlarged right side view of a part of FIG. 6A. In the drawing, reference numeral 16 denotes an opening formed in the mounting plate 6, and reference numeral 17 denotes a plurality of non-penetrating screw holes formed in a peripheral portion of the opening 16.

[0005] Reference numeral 18 denotes a plate body such as the equipment mounting plate 10 and the lid plate 12, and 19 denotes an annular packing groove formed on the back surface of the plate body 18, and a packing 20 is fitted into the packing groove 19.
The plate body 18 is applied to the peripheral portion of the opening 16 via a packing 20. Reference numeral 21 denotes a plurality of through holes provided on the outer peripheral portion of the plate body 18 outside the packing 20, and the mounting plate 6
Are formed at positions corresponding to the screw holes 17. Reference numeral 22 denotes a bolt inserted through each through hole 21 through a flat washer 23 and a spring washer 24. The bolt 22 is screwed into each of the screw holes 17, and the plate 18 is attached to the periphery of the opening 16 by the bolt 22, The opening 16 is hermetically closed by the plate 18.

The thickness of the mounting plate 6 is increased in order to prevent leakage of airtightness at the screwed portion of the bolt 22 to the mounting plate 6.
The screw holes 17 of the mounting plate 6 are not penetrated.

[0007]

In the case of the above-mentioned conventional apparatus, the bolt 22 is used to secure the airtightness inside the gas container 1.
It is necessary to ensure the tightness of the screwing portion of the mounting plate 6 to the mounting plate 6, and the screw holes 17 of the mounting plate 6 must be made impermeable.
There is a problem that the thickness of the mounting plate 6 is increased and the mass of the gas insulated switchgear is also increased. It is an object of the present invention to provide a gas-insulated switchgear plate mounting device that reduces the thickness of a mounting plate of a gas container and reduces the weight of a gas-insulated switchgear, keeping the above points in mind.

[0008]

According to a first aspect of the present invention, there is provided a gas insulated switchgear plate body mounting apparatus, comprising: a gas container having a gas chamber formed therein;
An annular packing is applied to the peripheral portion of the opening of the mounting plate of the container via a ring-shaped packing, and a plate body such as an equipment mounting plate or a lid plate that closes the opening, and an outer side of the plate body and the mounting plate with respect to the packing. A plurality of through holes and screw holes respectively formed in the peripheral edge of the bolt, and a bolt which is inserted into each of the through holes, is screwed into each of the screw holes, and a tip end is led out from the mounting plate;
A reinforcing member which is provided in an annular shape in parallel with the peripheral edge of the opening on the back surface of the mounting plate, covers a tip portion of each of the bolts, and has a peripheral edge air-tightly fixed to the rear surface by welding; It is a thing.

Therefore, the plate is applied to the peripheral edge of the opening of the mounting plate of the gas container via packing, and the opening is closed. The opening is closed and screwed into the screw hole of the mounting plate. The bolt tip is led out of the mounting plate, and the bolt tip is covered by a reinforcing member provided in an annular shape parallel to the peripheral edge of the opening on the back surface of the mounting plate. Since the portion is air-tightly fixed to the rear surface of the mounting plate by welding, it is possible to prevent leakage of airtightness at a screwed portion of the bolt to the mounting plate, thereby ensuring airtightness of the container.

The screw hole of the mounting plate can be penetrated with respect to the conventional non-penetration, the thickness of the mounting plate can be reduced, and the weight of the gas insulated switchgear can be reduced.
The reinforcing body can ensure reinforcement of the mounting plate.

According to a second aspect of the present invention, there is provided a plate body mounting apparatus, wherein the reinforcing member is studs implanted on mounting plates outside packings on both sides of the reinforcing member instead of the welding according to the first aspect. It is attached to the mounting plate by bolts or bolts that penetrate the outside of the packing on both sides of the reinforcement and are screwed to the mounting plate. Therefore, welding is not required, and the same operation as described above is achieved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. In these figures, the same reference numerals as those in FIG. 6B indicate the same or corresponding elements. (Embodiment 1) First, Embodiment 1 will be described with reference to FIGS. 1A and B of a rear view of the mounting plate of FIG. In the same drawing, reference numeral 25 denotes a mounting plate having a small thickness of the gas container 1, similarly to the mounting plate 6 in FIG. 6B, an opening 16 is formed, and a plate 18 is applied to the peripheral portion of the opening 16 via a packing 20. Has been done. 26 is the opening 16 of the mounting plate 25
And a plurality of screw holes formed through the periphery of the bolt 2, and the bolts 2 inserted through the respective through holes 21 of the plate 18 through the screw holes 26.
2 are screwed together, and the tip of each bolt 22 is led out from the mounting plate 25 to the inside, and the plate body 18 is mounted on the mounting plate 25.

Reference numeral 27 denotes a reinforcing member having a U-shaped cross section formed by bending both sides of a long plate, both ends of which are closed by end plates, and as shown in FIG. Opening 16
Are provided on both sides and on the upper and lower sides of the peripheral portion in parallel to the peripheral portion in a ring shape, cover the tip of each bolt 22, and the peripheral portion of the reinforcing member 27 is air-tightly fixed to the back surface of the mounting plate 25 by welding. The joint between the upper and lower reinforcing members 27 is hermetically fixed by welding.

The reinforcing member 27 can prevent airtight leakage at the screwed portion of the bolt 22 to the mounting plate 25, and can ensure the strength of the mounting plate 25.

(Embodiment 2) Next, Embodiment 2 will be described with reference to FIG. In the figure, the same reference numerals as those in FIG. 1A indicate the same or corresponding elements, and the different points are as follows.

An annular packing groove 28 is formed inside the screw hole 26 on the surface of the mounting plate 25, and the packing 20 is fitted into the packing groove 28. The packing 20 is inserted through the packing 20 into the peripheral portion of the opening 16 of the mounting plate 25. The plate body 18 is applied, the reinforcing body 29 is formed of a long rectangular bar, a long groove 30 is formed on the front surface, and is provided in the periphery of the opening 16 on the back surface of the mounting plate 25 in an annular shape parallel to the periphery. The tip of the bolt 22 is located in the long groove 30, and the tip of the bolt 22 is covered by the reinforcing body 29.

(Embodiment 3) Next, regarding Embodiment 3, a partially enlarged view of the right side view of FIG.
This will be described with reference to FIG. In these figures, the same symbols as those in FIG. 1A indicate the same or corresponding elements, and the differences are as follows.

Reference numeral 31 denotes an annular packing groove.
5 are formed on both sides of a line connecting the screw holes 26 on the back surface. Reference numeral 32 denotes a plurality of stud bolts.
Are implanted outside the two packing grooves 31. Reference numeral 33 denotes a reinforcing member made of a long plate, and as shown in FIG. 3B, is provided in a peripheral portion of the opening 16 on the back surface of the mounting plate 25 in an annular shape parallel to the peripheral portion. Reference numeral 34 denotes a cover having a U-shaped cross section formed at the center of the reinforcing member 33. The cover 34 covers the tip of each bolt 22. 35 is a cover 34
Mounting parts formed by bending outward from both ends of the
Reference numeral 6 denotes a plurality of insertion holes formed on the side edge of the mounting portion 35, and the stud bolt 32 is inserted into the insertion hole 36. Numeral 37 denotes a nut, which is screwed to the tip of the stud bolt 32 via a flat washer 38 and a spring washer 39, and
5 is provided with a reinforcing member 33.

Then, both ends of the vertical reinforcement 33 are closed by end plates, and the cover 34 of the horizontal reinforcement 33 extends to a position where it comes into contact with the cover 34 of the adjacent vertical reinforcement 33. Has been established.

(Embodiment 4) Next, Embodiment 4 will be described with reference to FIG. 3A, the same reference numerals as those in FIG. 3A denote the same or corresponding parts, and the difference is that both packing grooves 31 on the back surface of the mounting plate 25
A plurality of screw holes 40 are formed on the outer side of the bolt, and bolts 41 are inserted into the respective insertion holes 36 of the mounting portion 35 of the reinforcing member 33 via the flat washers 38 and the spring washers 39 and screwed into the screw holes 40, The point is that the reinforcing body 33 is mounted on the back surface of the mounting plate 25.

(Fifth Embodiment) Next, a fifth embodiment will be described with reference to FIG. 5A which is a partially enlarged right side view. 2, the same reference numerals as those in FIG. 2 denote the same or corresponding elements, and the differences are as follows.

Reference numeral 42 denotes a plurality of stud bolts, which are planted on both sides of a line connecting the screw holes 26 on the back surface of the mounting plate 25. Reference numeral 43 denotes a long and thick reinforcing member.
The opening 16 is provided on the back surface in parallel with the peripheral portion. Reference numeral 44 denotes a long groove formed on the front surface of the reinforcing member 43, and the tip of the bolt 22 is located in the long groove 44. 45 is a packing groove formed on both sides of the long groove 44 of the reinforcing member 43, and the packing 20 is fitted in the packing groove 45. 46 is a plurality of insertion holes,
The stud bolt 42 is inserted through each of the insertion holes 46. Reference numeral 47 denotes a nut, which is screwed to the tip of each stud bolt 42 via a flat washer 48 and a spring washer 49, and a reinforcing member 43 is mounted on the back surface of the mounting plate 25.

(Embodiment 6) Next, Embodiment 6 will be described with reference to FIG. 5B which is a partially enlarged right side view. 5A, the same reference numerals as those in FIG. 5A denote the same or corresponding components. The difference is that a plurality of screw holes 50 are formed on both sides of a line connecting the screw holes 26 on the back surface of the mounting plate 25, 43
A bolt 51 is inserted into each through hole 46 of the flat washer 48 and the spring washer 4.
9, is screwed into the screw hole 50, and the reinforcing member 43 is mounted on the back surface of the mounting plate 25.

[0024]

Since the present invention is configured as described above, it has the following effects. The plate mounting device for a gas insulated switchgear according to claim 1 of the present invention is:
The plate body 18 is applied to the periphery of the opening 16 of the mounting plate 25 of the gas container 1 via the packing 20 to close the opening 16,
The mounting plate 25 is inserted through each through hole 21 of the plate body 18 and
Of the bolt 22 screwed into the screw hole 26 of the mounting plate 2
5, a reinforcing member 27 provided annularly in parallel to the peripheral edge of the opening 16 on the back surface of the mounting plate 25,
29, the tip of the bolt 22 is covered, and the reinforcing member 27,
Since the peripheral portion of the fixing member 29 is air-tightly fixed to the back surface of the mounting plate 25 by welding, it is possible to prevent leakage of airtightness at a screwed portion of the bolt 22 to the mounting plate 25, and to ensure airtightness of the container 1. .

The screw hole 26 of the mounting plate 25 can be penetrated with respect to the conventional non-penetration, the thickness of the mounting plate 25 can be reduced, and the weight of the gas insulated switchgear can be reduced. The reinforcement of the mounting plate 25 can be ensured by the reinforcing members 27 and 29.

Further, in the plate body mounting device according to the second aspect of the present invention, the reinforcing members 33 and 43 are replaced with the reinforcing members 3 instead of welding.
The stud bolts 32, 42 or the reinforcing members 3 planted on the mounting plate 25 outside
3 and 43, the bolts 22 are passed through the packing 20 on both sides and are attached to the mounting plate 25 by the bolts 22 screwed to the mounting plate 25. Therefore, welding is not required, and the same effects as described above can be obtained.

[Brief description of the drawings]

1A is an enlarged right side view of a part of the first embodiment of the present invention, and FIG. 1B is a rear view of the mounting plate of FIG.

FIG. 2 is an enlarged cut right side view of a part of Embodiment 2 of the present invention.

FIG. 3A is an enlarged cut right side view of a part of the third embodiment of the present invention, and FIG. 3B is a rear view of the mounting plate of A;

FIG. 4 is an enlarged cut right side view of a part of a fourth embodiment of the present invention.

FIGS. 5A and 5B are enlarged right side views of a part of Embodiments 5 and 6 of the present invention.

6A is a perspective view of a gas container of a conventional gas insulated switchgear, and FIG. 6B is an enlarged right side view of a part of the plate mounting device of A. FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 gas container 2 gas chamber 16 opening 18 plate body 20 packing 21 through hole 25 mounting plate 26 screw hole 27 reinforcing body 29 reinforcing body 32 stud bolt 33 reinforcing body 41 bolt 42 stud bolt 43 reinforcing body 51 bolt

Continuation of the front page (72) Inventor Tsutomu Ichii 47-Umezu Takaune-cho, Ukyo-ku, Kyoto Nissin Electric Co., Ltd.

Claims (2)

[Claims] 1. A gas container having a gas chamber formed therein, and a device mounting plate, a cover plate, etc., which is applied to a peripheral portion of an opening of a mounting plate of the container via an annular packing to close the opening. A plurality of through holes and screw holes respectively formed on the outer periphery of the plate body and the mounting plate with respect to the packing, and each of the through holes is inserted into each of the through holes. And
A tip is provided at the periphery of the opening on the back surface of the mounting plate, and a ring is provided in parallel with the periphery so as to cover the tip of each bolt. And a reinforcing member hermetically fixed by welding to the plate body. 2. A gas container having a gas chamber formed therein, and a device mounting plate, a cover plate, etc., which is applied to a peripheral portion of an opening of a mounting plate of the container via an annular packing to close the opening. A plurality of through holes and screw holes respectively formed on the outer periphery of the plate body and the mounting plate with respect to the packing, and each of the through holes is inserted into each of the through holes. And
A tip is provided in a ring extending parallel to the peripheral edge of an opening on the back surface of the mounting plate and a bolt extending from the mounting plate, and covers the distal end of each bolt. And a reinforcing member airtightly applied through a stud bolt planted on the mounting plate outside the packing on both sides of the reinforcing member, or on both sides of the reinforcing member. A plate mounting device for a gas insulated switchgear, wherein the device is mounted on a mounting plate by a bolt that penetrates the outside of the packing and is screwed to the mounting plate.