JPH06141422A - Gas insulated switch gear - Google Patents

Abstract

PURPOSE:To obtain a gas insulated switch gear which be fixed an firmly and easily without sealing insulation gas into a box body when fixing the box body at a support stand. CONSTITUTION:In gas insulated switch gears 1A and 1B, box bodies 3A and 3B in airtight structure are fixed on the upper surface of support stands 2A and 2B. Air parts 4A and 4B are formed at the rear left and right edges of the box bodies 3A and 3B and air insulation parts 4C and 4D are formed at the lower-edge left and right parts. Then, bearings 9A, 9C, and 9B are mounted to the rear, middle, and front parts of the air insulation parts 4C and 4D, respectively. An operation rod 10 penetrates through the bearings, a handle 12 is fixed to the front edge of the operation rod 10, and a hook 11 is fixed to the rear edge and the middle part. Then, the handle 12 is rotated, thus pressing the hook 11 to the lower surface of the formed steel at the left and right upper parts of a support.

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, and more particularly to a gas insulated switchgear having an improved fixing structure between a mounting base and a box.

[0002]

2. Description of the Related Art FIG. 6A is a perspective view showing an example of a conventional front maintenance type air-insulated switchgear, and FIG.
FIG. 7 is a sectional view taken along line EE in FIG. 6 (a), 6 (b)
Support made by butt welding of channel steel at
A box body 21 is placed on the upper surface of the support body 22, and the box body 21 is fixed to the support base 22 with bolts 19 inserted from above into a stud with a female screw (not shown) provided on the lower surface of the upper end of the support base 22. Has been done. The box body 21 is installed such that the rear end thereof is in close contact with the front surface of the wall 26.

A device housing 23 is formed inside the box body 21 except for the front and rear maintenance spaces and the right side maintenance space.
Inside the 23, a vacuum circuit breaker, a disconnecting switch, a current transformer for measuring instruments, and the like, which are not shown, are housed. A front door 25 is attached to the front end of the box body 21 as shown in FIG.
On the left and right sides of the box body 21, three connection holes 13 are provided at equal intervals in the vertical direction for connecting and fixing the box body (not shown) adjacent to the left and right sides of the box body 21.

In the front-maintenance type air-insulated switchgear constructed as described above, support pedestals (not shown) are installed on both sides of the support pedestal 22 on the installation surface. It is fixed to the installation surface with a J-shaped foundation bolt (not shown) embedded in advance. In addition, the box placed on the upper surface of these support stands installed adjacent to each other,
By being fixed to each other by bolts inserted in the connection holes 13 shown in FIG. 6 (a) provided on the left and right of these boxes, the rigidity of the whole is improved and the seismic resistance of the insulated switchgear is guaranteed. ing.

On the other hand, at the time of regular inspection, when inspecting electric equipment such as a vacuum circuit breaker (not shown) attached to the equipment housing 23, after opening a switch (not shown) connected to the power source side, The door 25 is opened to enter the maintenance space formed in the front or the right side of the equipment storage portion 23, or the hand is inserted to perform the work.

By the way, in order to reduce the installation area, in the front maintenance type air-insulated switchgear installed on the front surface of the wall surface, as described above, the front door is opened for maintenance.
Although inspections are performed, gas switch switch gears are increasingly used in recent switchgears in order to further save labor in maintenance and inspections.

FIG. 7 (a) is a perspective view showing an example of a conventional front maintenance type gas insulated switchgear, and FIG. 7 (b) is a sectional view taken along the line FF of FIG. 7 (a). In FIGS. 7A and 7B, a narrow maintenance space 32 is provided at the front of the box 31.
As shown in (b), the connection holes 13 are provided only on the front side on the left and right side surfaces of the box body 31, and the above-described threaded studs for fixing the lower end of the box body 31 to the support base 22, Box body 31 for inserting the bolt 19 to be tightened on this female threaded stud 31
The side connecting hole is also provided only in the front.

[0008]

However, in the gas-insulated switchgear configured as described above, the support base 22
Since the connecting part between and the adjacent box body is only on the front side,
Compared to the air-insulated switchgear shown in FIGS. 6 (a) and 6 (b), the seismic resistance may be reduced. Therefore, it is conceivable to provide the connection hole 13 on the side wall of the gas division chamber (not shown) located at the rear part.However, not only may the insulating gas leak from the connection hole to the outside, but also the insulation may occur after the connection at the installation site. The gas filling work must be performed, which lengthens the installation period. Therefore, an object of the present invention is to obtain a gas-insulated switchgear that can firmly and easily fix the box body to the support base without performing an insulating gas filling operation when installing the box body. is there.

[0009]

According to the present invention, in a gas-insulated switchgear in which a box having an airtight structure is fixed to the upper surface of a support base, an air-insulating portion is formed in the front-rear direction at the bottom of the box,
The air insulation part is provided with a plurality of bearings and an operation shaft penetrating the bearings in the front-rear direction, and the operation shaft is provided with a hook part whose tip engages with the support base when the operation shaft rotates. And

[0010]

The box body is fixed to the support base by the tip of the hook portion that swings by the rotation of the operation shaft operated from the front.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the gas insulated switchgear of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a gas-insulated switchgear of the present invention, showing a case where a switchgear 1A and a switchgear 1B are connected left and right. 2A is a partial perspective view of FIG. 1 (that is, a state before being lined up), and FIG. 2B is a transverse cross-sectional view showing the bottom of FIG. 2A.

In FIG. 1, the support base 2 installed on the left side
A box 3A is placed on the upper surface of A, and a box 3B having the same width and depth as the box 3A is also placed on the upper surface of the support base 2B installed on the right side. Each box 3A, 3B
A front door 5 is attached to each of the front ends of the two as shown in FIG. At the lower front ends of the left and right supports 2A and 2B, FIG. 3 showing a plan view of the supports 2A and 2B.
FIG. 3A is a sectional view taken along the line A-A in FIG. 3A and FIG.
As shown in (d), bolt holes 13B are provided on the left and right. On the upper surfaces of these bolt holes 13B, inclined washers 27, which are not shown in detail, are fixed by welding. As shown in FIG. 3 (a) and FIG. 3 (c) showing the BB cross section of FIG. 3 (a), bolt holes 13A are provided in the upper left and right portions of the left and right support bases 2A, 2B. A female threaded stud 26 is welded on the same center line as the bolt hole 13A on the lower surface of the upper portion of the channel steel of the support bases 2A, 2B provided with the bolt hole 13A.

In the bottom plates 6A and 6B of the boxes 3A and 3B, as shown in FIG. 2B, a square hole 7 whose longitudinal direction is the long side is formed.
A and 7B are formed on the left and right, and the outer lines of the square holes 7A and 7B are, as shown by the dotted lines in FIG.
It is coincident with the inner lines of the left and right teeth of the channel steel forming A and 2B. As shown in FIG. 2B, elliptical holes 8A and 8B are provided on the left and right at the front ends of the bottom plates 6A and 6B. These elliptical holes 8A and 8B are the bolt holes 13 shown in FIG.
The center coincides with C. At the rear left and right ends of the boxes 3A, 3B, prismatic air parts 4A, 4B shown in FIG. 2 and FIG. 3 (e) showing a plan view of this FIG.
On both sides of the lower end of 3B, prismatic air portions 4C and 4D are formed in the front-rear direction, and also on the rear side of the lower ends of the boxes 3A and 3B.
An aerial portion 4E shown in FIG. 1 is formed.

As shown in FIG. 3 (b) showing the right side view of FIG. 2, side plates 17 are attached to the left side surface of the box body 3A and the right side surface of the box body 3B. The side plate 17 is provided with three connecting holes 13 at the front end in the vertical direction and one connecting hole 13 in the upper portion at the rear end. A square hole 7C is vertically formed below the connecting hole 13 at the rear end of the side plate 17, and a blind plate (not shown) is attached to the outer surface of the square hole 7C. As shown in FIG. 2 (b), the lines coincide with the inner lines of the teeth of the shaped steel bones 4a and 4b vertically provided at the outer corners of the midair portions 4A and 4B.

As shown in FIG. 1 and FIG. 4 showing a partially enlarged detailed view of FIG. 1, an L-shaped bearing 9B is fixed to the front end of the left air portion 4C on the bottom surface of the box 3A. 4C
An L-shaped bearing 9A having the same outer shape as the bearing 9B is fixed to the rear end of the rear square hole 7A at the rear end as well, and the bearings 9A and 9B are also similarly provided to the rear left side of the front square hole 7A. A bearing 9C having the same outer shape is fixed.

An operating rod 10 is inserted through the bearings 9A, 9B and 9C in the front-rear direction, and a handle 12 is attached to the front end of the operating rod 10. At the rear end of the operating rod 10, a square rod portion, which is welded to the operating rod 10 through which the rear end of the operating rod 10 penetrates the axial center, and the inside of the upper part is welded to the right side surface of the square rod portion.
A hook 11 is provided which is a lever portion of the shape. The lower portion of the hook 11 is loosely fitted into the rear square hole 7A from above, and the upper surface of the lower portion of the hook 11 is in contact with the lower surfaces of the upper left teeth of the support base 2A.

The intermediate portion of the operating rod 10 has a square rod portion which is welded to the operating rod 10 through which the intermediate portion of the operating rod 10 penetrates the shaft center, and the inside of the upper portion is welded to the right side surface of the square rod portion. A hook 11 formed of an L-shaped lever portion is provided. The lower portion of the hook 11 is loosely fitted into the front square hole 7A from above, and the upper surface of the lower portion of the hook 11 is in contact with the lower surfaces of the left teeth of the support base 2A. Similarly, at the front end of the right-side air portion 4D on the bottom surface of the box 3A, the bearing 9 manufactured differently from the left bearing 9b is provided.
B is fixed, and the rear square hole 7B is also provided at the rear end of the aerial portion 4D.
An L-shaped bearing 9A is fixed to the right side of the rear end, and a bearing 9C is also fixed to the left side of the rear end of the front square hole 7B.

An operating rod 10 is inserted through the bearings 9A, 9B and 9C in the front-rear direction, and a handle 12 is attached to the front end of the operating rod 10. At the rear end of the operating rod 10, a square rod portion, which is welded to the operating rod 10 through which the rear end of the operating rod 10 penetrates the axial center, and the inside of the upper part is welded to the right side surface of the square rod portion.
A hook 11 is provided which is a lever portion of the shape. The lower portion of the hook 11 is loosely fitted into the rear square hole 7B from above, and the upper surface of the lower portion of the hook 11 is in contact with the lower surfaces of the upper right teeth of the support base 2A.

The intermediate portion of the operating rod 10 has a square rod portion which is welded to the operating rod 10 with the intermediate portion of the operating rod 10 penetrating through the shaft center, and the inside of the upper portion is welded to the right side surface of the square rod portion. A hook 11 formed of an L-shaped lever portion is provided. The lower portion of the hook 11 is loosely fitted into the front square hole 7B from above, and the upper surface of the lower portion of the hook 11 is in contact with the lower surface of the right tooth of the support base 2A.

A through hole is provided in the front part of the left bearing 9B at a rear position on the right side of the handle 12, and a welding nut (not shown) is welded to the rear part of the through hole on the same center line to form a bearing 9B on the bearing 9B. A hexagon socket head cap screw 19 is screwed into the weld nut from the front. Similarly, the right bearing 9
A through hole is provided at a rear position on the left side of the handle 12 at a front portion of B, and a welding nut (not shown) is welded on the same center line at a rear portion of the through hole. A hexagon socket head cap screw 19 is screwed from the front.

On the other hand, an L-shaped bearing 9B is fixed to the inside of the left side at the upper part of the air part 4B, an L-shaped bearing 9A is fixed to the lower end of the air part 4B, and also to the lower part of the bearing 9A. Similarly, the bearing 9C is fixed. An operating rod 10 is vertically inserted through these bearings 9A, 9B, 9C, and a handle 12 is attached to the upper end of the operating rod 10. At the lower end of the operating rod 10, a rectangular rod portion is welded to the operating rod 10 through which the lower end of the operating rod 10 penetrates the axis, and an L-shaped portion in which the inside of the left portion is welded to the front side surface of the operating rod 10. Hook consisting of lever
11 are provided. The right end of the hook 11 is loosely fitted into the rear square hole 7C from the front, and the right side surface of the hook 11 is
It contacts the right side surface of the bone 4a at the rear end on the left side of the box 1B.

At the intermediate portion of the operating rod 10, a square rod portion is welded to the operating rod 10 with the intermediate portion of the operating rod 10 penetrating through the shaft center, and the inside of the left portion is welded to the front side surface of the square rod portion. There is provided a hook 11 which is an L-shaped lever portion. The right portion of the hook 11 is loosely fitted into the square hole 7C from the front, and the right side surface of the hook 11 is in contact with the right side surface of the lower surface of the bone 4a at the right rear end of the box 1B.

By the way, when the gas insulated switchgear constructed as described above is installed on the supports 2A and 2B, the handle 12 at the front end of the aerial portion 4C of the boxes 1A and 1B is set to the position shown in FIG.
As shown in the enlarged view of (a), face the right side, and insert the hexagon socket head cap screw 19 into the welding nut to keep it horizontal. Similarly, the handle 12 at the front end of the right aerial part 4D is also oriented horizontally toward the left side symmetrically with the left side by means of the hexagon socket head cap bolt 19.

Next, the left side box 3A is placed on the upper surface of the support base 2A and temporarily fixed at a predetermined position, then the right side box 3B is placed on the support base 2B, and the right side of the left side box is Stick it to the surface. In this state, bolts for connection are inserted into the connection holes 13 of the close contact portions of the left and right boxes 3A and 3B to temporarily fix them, and then,
Insert a bolt from the elliptical hole 8A at the front end into the stud with female screw 2b and tighten.

Further, by removing the hexagon socket head cap bolt 19 in the state shown in FIG. 5A and rotating the handle 12 clockwise by 90 ° as shown by an arrow C in FIG. The hook 11 shown in c) is also rotated as shown by the arrow D, and the tip of this hook 11 is brought into contact with the lower surface of the lower end of the hook 11 and the lower surface of the left upper end of the support base 2A as shown in FIG. 5D. Abut (Note: the hook indicated by the alternate long and short dash line in FIG. 5C will be described later as another embodiment). Then, FIG. 5 (b)
As shown in FIG. 5, the hexagon socket head cap screw 19 is inserted into the welding nut provided on the bearing 9B as shown in FIG. 5B, and fixed with a double nut.

Similarly, the handle 12 provided on the right air portion 4D is rotated counterclockwise by 90 ° to move the hook 11 from the right square hole 7B to the tooth on the upper surface of the channel steel on the right side of the support base 2A. Press on the lower surface of and fix with hexagon socket bolts 19. next,
A handle attached to the upper part of the aerial part 4B after fully tightening the connecting bolts that temporarily fix the close contact parts of the boxes 2A and 2B.
12 is rotated counterclockwise by 90 °, and the tips of the upper and lower hooks 11 are brought into contact with the inner surfaces of the upper left teeth of the bone 4a at the rear left end of the right side box 3B. In addition, the hexagon socket head cap screw 19
Insert into the welding nut of B and fix the handle 12. Finally, a blind plate (not shown) is attached to the upper surfaces of the air parts 4A and 4B.

In the above embodiment, the box 3A,
The example in which the hook 11 for fixing the 3B to the support bases 2A and 2B is provided on the upper surface of the bottom of the boxes 3A and 3B has been described.
As described above in (c), it is provided inside the left and right ends of the support bases 2A and 2B at positions symmetrical with the upper solid line as shown by the alternate long and short dash line in FIG. Then, rotate the hook on the right side with the handle clockwise,
The tips of the hooks may be pressed against the upper surfaces of the shaped steel bones at the left and right ends of the bottoms of the boxes 3A and 3B. In this case, the support base 2
Although it is necessary to provide work ports on the left and right sides of the front surfaces of A and 2B and to provide blind lids to these work ports, there is an advantage that the arrangement of the equipment of the gas insulating part is not restricted.

Further, in the above embodiment, the rod 10 and the hook
Although the fixing metal fittings according to 11 have been described as an example in which they are provided on the bottom and the back of the boxes 2A and 2B, the aerial part is symmetrical to the aerial parts 4C and 4D on the lower surface of the ceiling at the upper end adjacent to the boxes 2A and 2B. It may be formed in the above and stored. However, in this case, since the hook comes out to the upper part of the ceiling surface, the ceiling plate needs a square hole and a blind plate for closing the square hole, but since it is possible to work from the front of the box, Even when the space between the ceiling of the box and the ceiling of a building or the like in which the box is installed is narrow, there is an advantage that workability during installation work is facilitated.

In the above embodiment, the box to be connected has been described as having two surfaces of the boxes 2A and 2B. However, regardless of the number of boards, the same applies to the case of three surfaces or five surfaces. Can be implemented. Further, in the above-described embodiment, the operating rod 10 is made of a tubular material, so that the outer diameter is increased to increase the rigidity of the springiness of the torsion when the handle 12 is rotated, and the fixing force of the box body by the tip of the hook 11 is increased. May be.

[0030]

As described above, according to the present invention, in the gas-insulated switchgear in which the box body having the airtight structure is fixed to the upper surface of the support base, the air insulating portion is formed in the front-rear direction at the lower part of the box body. The air insulation part is provided with a plurality of bearings and an operation shaft penetrating the bearings in the front-rear direction, and the operation shaft is provided with a hook part whose tip engages with the support base by rotation of the operation shaft. By the tip of the hook that swings with the rotation of the operating shaft,
Since it is fixed to the support base, when installing the box body, the box body is firmly attached to the support base without performing the filling work of the insulating gas.
Moreover, it is possible to obtain a gas-insulated switchgear that can be easily fixed.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a gas insulated switchgear of the present invention.

FIG. 2A is a perspective view showing an embodiment of a gas insulated switchgear of the present invention. (B) is a top view which shows the bottom part of the gas insulated switchgear of this invention.

FIG. 3A is a plan view showing a support base of one embodiment of the gas insulated switchgear of the present invention. (B) is a right side view of the gas insulated switchgear of the present invention. (C) is FIG.
BB sectional drawing of. FIG. 3D is a sectional view taken along line AA of FIG. FIG. 3E is a plan view of FIG.

FIG. 4 is a perspective view showing a main part of a gas insulated switchgear according to the present invention.

5 (a) and 5 (b) are partially enlarged front views showing a main part different from FIG. 4 of the gas insulated switchgear of the present invention.
(C) And (d) is a partial expanded longitudinal cross-sectional view which shows the effect | action of the gas insulated switchgear of this invention.

FIG. 6A is a perspective view showing an example of a conventional air-insulated switchgear. (B) is EE sectional drawing of (a).

FIG. 7A is a perspective view showing an example of a conventional gas insulated switchgear. (B) is FF sectional drawing of (a).

[Explanation of symbols]

1A, 1B ... Gas insulated switchgear, 2A, 2B ... Support stand, 3A, 3B ... Box body, 4A, 4B, 4C, 4D, 4E
... Insulating part, 5 ... Front door, 6A, 6B ... Bottom plate, 7A,
7B, 7C ... Square hole, 8A, 8B ... Elliptical hole, 9A, 9B,
9C ... Bearing, 10 ... Operating rod, 11 ... Hook, 12 ... Handle,
13 ... Connection hole, 13A, 13B ... Bolt hole.

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shiro Otake No. 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Corporation Fuchu factory

Claims (1)

[Claims] 1. A gas-insulated switchgear in which a box having an airtight structure is fixed to an upper surface of a support base, and an air-insulating portion is formed in a front-rear direction at a lower portion of the box, and a plurality of air-insulating portions are formed in the air-insulating portion. The gas-insulated switchgear according to claim 1, wherein the bearing and an operating shaft that penetrates the bearing in the front-rear direction are provided, and the operating shaft is provided with a hook portion whose tip engages with the support base when the operating shaft rotates.