WO2015019516A1

WO2015019516A1 - Gas-insulated switchgear

Info

Publication number: WO2015019516A1
Application number: PCT/JP2013/084609
Authority: WO
Inventors: 大西　健司; 慎太郎黒明
Original assignee: 三菱電機株式会社
Priority date: 2013-08-05
Filing date: 2013-12-25
Publication date: 2015-02-12
Also published as: CN105359361B; CN105359361A

Abstract

A gas-insulated switchgear includes a first tank in which a gas circuit breaker is stored and an insulation gas is sealed, the first tank comprising: an upper wall plate; a lower wall plate opposite the upper wall plate; a pair of side wall plates individually attached between the upper wall plate and the lower wall plate and formed into an arc shape in a front-to-back horizontal direction and in a vertical direction; a front end plate for covering the front end of the frame body formed from the upper wall plate, the lower wall plate, and the pair of side wall plates; and a rear end plate for covering the rear end of the frame body formed from the upper wall plate, the lower wall plate, and the pair of side wall plates.

Description

Gas insulated switchgear

The present invention relates to a gas insulated switchgear equipped with a circuit breaker tank in which, for example, an insulating gas is enclosed and accommodates a switching device such as a circuit breaker, and more particularly to a side wall structure of the circuit breaker tank.

As a conventional gas-insulated switchgear, for example, there is one disclosed in Patent Document 1 (see Japanese Utility Model Publication No. Sho 60-113612). The container in which the equipment is stored / arranged is formed into a rectangular shape with a corrugated flat plate, and the corrugated shape is processed by press molding or the like, so that the main circuit charging unit side and the ground side are insulated by making the corrugated shape The distance is secured.

Another gas-insulated switchgear is disclosed, for example, in Patent Document 2 (see Japanese Patent Application Laid-Open No. 8-191515). In contrast to the structure of Patent Document 1, both side walls of the container are arranged in the horizontal direction of the container. On the other hand, it is formed in an arc shape that bulges outward, eliminating the need for a press molding operation or the like for forming a corrugated shape, and reducing the processing cost. Further, the upper wall surface of the container is formed in a circular arc shape with the center portion protruding upward.

Furthermore, as another gas insulated switchgear, for example, there is one disclosed in Patent Document 3 (see Japanese Patent Application Laid-Open No. 2002-260501), which is provided on each flange side located at both front and rear ends in the depth direction of the container side wall as a container. A bent portion is formed in the near part, and the distance between both side walls is widened at least in the central region in the length direction of the side walls.

Japanese Utility Model Publication No. 60-113612 (FIGS. 1A and 2A) JP-A-8-191515 (FIGS. 1 and 3) Japanese Patent Laid-Open No. 2002-260501 (FIGS. 1 and 2)

In the gas insulated switchgear described in the above-mentioned conventional Patent Document 1, since the container has a corrugated shape, the main circuit charging unit side equipment such as the circuit breaker, disconnector, lightning arrester, etc. and the ground side However, there is a problem in that it is not suitable for reducing the size and weight of the gas-insulated switchgear because many reinforcing materials are required to improve the strength of the gas-sealed container.

In addition, the gas insulated switchgear described in Patent Document 2 is formed in an arc shape in which both side walls of the container swell outwardly with respect to the horizontal direction of the container, and the upper wall surface of the container also has its center portion upward. Since it is formed in a protruding arc shape, there is a protruding part at the center of the upper wall surface of the container when stacking multiple tanks in the vertical direction, and stacking to reduce the height is difficult There was a problem that there was. Also, the vertical ends of both side walls of the container are not arc-shaped, and when multiple tanks are stacked in the vertical direction and fastened together, the vertical ends of both wall plates In order to fasten the stacked portions in the vertical direction, there is a problem in that it is necessary to extend the fastening portions in the lateral direction, and the size in the width direction of the gas insulated switchgear increases.

Further, the gas insulated switchgear described in Patent Document 3 has a bent portion formed in a portion near each flange side located at both front and rear end sides in the depth direction of the container side wall as a container. When the ends are not bent and a plurality of tanks are stacked in the vertical direction and the two are fastened together, there is no bent portion at the vertical ends of both wall plates, and the vertical stacked portions are fastened. However, it is necessary to project the fastening portion in the lateral direction, and there is a problem that the size in the width direction of the gas insulated switchgear becomes large.

The present invention has been made in order to solve the above-described problems. The object of the present invention is to reduce the weight by forming the side wall plates of the tank in an arc shape in the horizontal and vertical directions before and after the tank. A compact gas insulated switchgear is provided.

A gas-insulated switchgear according to the present invention is a gas-insulated switchgear having a first tank in which a circuit breaker is housed and an insulating gas is sealed. The first tank includes an upper wall plate and the upper wall. A pair of side wall plates that are respectively mounted between the lower wall plate facing the plate and the upper wall plate and the lower wall plate and curved in a circular arc shape in the horizontal and vertical directions in the front-rear direction. A front end plate for closing a front side of a frame formed by the upper wall plate, the lower wall plate, and the pair of side wall plates, the upper wall plate, the lower wall plate, and the pair of And a rear end plate for closing the rear side of the frame formed by the side wall plates.

The gas-insulated switchgear according to the present invention is a gas-insulated switchgear having a first tank in which a circuit breaker is housed and an insulating gas is enclosed, wherein the first tank includes an upper wall plate, A lower wall plate facing the upper wall plate, and a pair of side portions that are respectively attached between the upper wall plate and the lower wall plate and curved in a circular arc shape in the front-rear horizontal direction and the vertical direction A wall plate, a front end plate that closes a front side of a frame formed by the upper wall plate, the lower wall plate, and the pair of side wall plates; the upper wall plate; the lower wall plate; A rear end plate that closes the rear side of the frame body formed by a pair of side wall plates, and is placed on the upper side of the first tank, and a busbar portion and the like are arranged on the second side It is equipped with a tank.

According to the gas-insulated switchgear according to the present invention, a lightweight and compact gas-insulated switchgear can be obtained by forming both side wall plates of the tank in an arc shape in the horizontal and vertical directions before and after the tank.

It is side surface sectional drawing which shows the gas insulated switchgear concerning Embodiment 1 of this invention. FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 3 is a cross-sectional view taken along line BB of FIG. 2 showing the gas insulated switchgear according to Embodiment 1 of the present invention. It is a perspective view which shows the 1st tank in the gas insulated switchgear concerning Embodiment 1 of this invention. FIG. 5 is a cross-sectional view taken along the line CC of FIG. 4 showing the gas insulated switchgear according to Embodiment 1 of the present invention. It is the front view seen from the D direction of FIG. 4 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a right view of FIG. 6 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is the front view seen in the E direction of FIG. 4 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a right view of FIG. 8 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a front view of the side wall seen in the F direction of FIG. 4 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a right view of FIG. 10 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a bottom view of FIG. 10 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is sectional drawing in the GG line of FIG. 10 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is sectional drawing in the HH line of FIG. 10 which shows the gas insulated switchgear concerning Embodiment 1 of this invention. It is a perspective view which shows the side wall in the gas insulated switchgear concerning Embodiment 1 of this invention. FIG. 2 is a cross-sectional view taken along the line JJ of FIG. 1 showing the gas insulated switchgear according to Embodiment 1 of the present invention. It is a side view which shows the 1st tank in the gas insulated switchgear concerning Embodiment 1 of this invention. FIG. 18 is a cross-sectional view taken along the line KK of FIG. 17 showing the gas insulated switchgear according to Embodiment 1 of the present invention. It is a side view which shows the 2nd tank in the gas insulated switchgear concerning Embodiment 1 of this invention. FIG. 20 is a cross-sectional view taken along line LL in FIG. 19, showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view taken along line MM in FIG. 3 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view taken along line NN in FIG. 3, showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view taken along line PP of FIG. 3 showing the gas insulated switchgear according to Embodiment 1 of the present invention.

Embodiment 1 FIG.
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 23. In each of the drawings, the same or equivalent members and parts will be described with the same reference numerals. 1 is a side sectional view showing a gas insulated switchgear according to Embodiment 1 of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. 1, showing a gas insulated switchgear according to Embodiment 1 of the present invention. 3 is a cross-sectional view taken along line BB of FIG. 2, showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 4 is a perspective view showing a first tank in the gas insulated switchgear according to Embodiment 1 of the present invention. 5 is a cross-sectional view taken along the line CC of FIG. 4 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 6 is a front view of the gas insulated switchgear according to Embodiment 1 of the present invention as seen in the direction D of FIG. 7 is a right side view of FIG. 6 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 8 is a front view of the gas insulated switchgear according to Embodiment 1 of the present invention viewed in the direction E of FIG. FIG. 9 is a right side view of FIG. 8 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 10 is a front view of the side wall seen in the direction F of FIG. 4 showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 11 is a right side view of FIG. 10 showing the gas insulated switchgear according to Embodiment 1 of the present invention. 12 is a bottom view of FIG. 10 showing the gas insulated switchgear according to Embodiment 1 of the present invention. 13 is a cross-sectional view taken along the line GG of FIG. 10, showing the gas insulated switchgear according to Embodiment 1 of the present invention. 14 is a cross-sectional view taken along the line HH of FIG. 10, showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 15 is a perspective view showing a side wall in the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 16 is a cross-sectional view taken along line JJ of FIG. 1, showing a gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 17 is a side view showing a first tank in the gas insulated switchgear according to Embodiment 1 of the present invention. 18 is a cross-sectional view taken along the line KK of FIG. 17, showing the gas insulated switchgear according to Embodiment 1 of the present invention. FIG. 19 is a side view showing a second tank in the gas insulated switchgear according to Embodiment 1 of the present invention. 20 is a cross-sectional view taken along line LL in FIG. 19, showing the gas insulated switchgear according to Embodiment 1 of the present invention. 21 is a cross-sectional view taken along line MM in FIG. 3, showing the gas insulated switchgear according to Embodiment 1 of the present invention. 22 is a cross-sectional view taken along line NN in FIG. 3, showing the gas insulated switchgear according to Embodiment 1 of the present invention. 23 is a cross-sectional view taken along the line PP of FIG. 3 showing the gas insulated switchgear according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 1 denotes a first tank disposed on the lower side in which an insulating gas (SF ₆ gas, N ₂ gas, CO ₂ gas, dry air, etc.) is enclosed and is hermetically configured. A rectangular mounting plate 3 that closes the front opening of the tank 1 is a vacuum circuit breaker mounted on the mounting plate 2, and is disposed in the first tank 1. 4 is an operation mechanism of the vacuum circuit breaker 3 mounted on the opposite side of the vacuum circuit breaker 3 with the mounting plate 2 interposed therebetween, and 5 is mounted on the mounting plate 2 in the same manner as the vacuum circuit breaker 3 and is connected / disconnected / grounded. A first disconnector / grounding switch having each function is disposed in the first tank 1. Reference numeral 6 denotes an operating mechanism for the first disconnector / grounding switch 5 mounted on the opposite side of the first disconnector / grounding switch 5 across the mounting plate 2. The mounting plate 2 is attached so as to block the front side opening of the first tank 1, and the vacuum circuit breaker 3 and the first disconnector / ground switch 5 are held in the first tank 1 in an airtight state.

Reference numeral 7 denotes a cable connecting bushing for connecting a cable, and the rear end plate of the first tank 1 is formed in such a manner that the rear end plate 46 of the first tank 1 is hermetically penetrated in the rear direction and the connecting portion protrudes. 46 is attached. 8 is a connector attached to one end of the

cable connection bushing

7, 9 is a connector attached to one terminal of the first disconnector /

ground switch

5, and 10 is a main connection between the connector 8 and the connector 9. A circuit conductor, 11 is a main circuit conductor that connects between one terminal of the vacuum circuit breaker 3 and the other terminal of the first disconnector /

ground switch

5, 12 is a lightning arrester, and one end is connected via a connector 13. Are connected to a lightning arrester connection conductor 14 branched from the main circuit conductor 10. Reference numeral 15 denotes an operation mechanism for grounding the lightning arrester 12. The grounding conductor 16 is driven in the left-right direction in FIG. 1 to be brought into contact with or separated from the other end of the lightning arrester 12, and connected to the lightning arrester 12. At the same time, during the withstand voltage test on the cable side, the lightning arrester 12 is disconnected from the other end to prevent the lightning arrester 12 from being damaged.

17 is a second tank located on the upper side of the first tank 1, which is hermetically configured with an insulating gas (SF ₆ gas, N ₂ gas, CO ₂ gas, dry air, etc.) sealed therein. A tank, 18 is a rectangular mounting plate that closes the front opening of the

second tank

17, and 19 is a second disconnector / grounding opening / closing function mounted on the mounting plate 18 and having the functions of "connection-disconnection-grounding". 20 is an operating mechanism of a second disconnector / grounding switch mounted on the opposite side of the second disconnector / grounding switch 19 across the mounting

plate

18, and 21 is a second disconnector / grounding switch. The third disconnector / grounding switch mounted on the mounting plate 18 and having the functions of “connecting-disconnecting / grounding” as in the

case

19, and 22 is the third disconnecting switch / grounding opening / closing across the mounting plate 18. 3 is an operating mechanism of a third disconnector / grounding switch 21 mounted on the opposite side of the device 21. The mounting plate 18 is attached so as to close the opening on the front side of the second tank 17, and the second disconnector / grounding switch 19 and the third disconnector / grounding switch 21 are placed in the second tank 17. Hold in an airtight state.

Reference numeral 23 denotes a first bus for three phases arranged in the horizontal direction above the second tank 17. Reference numeral 24 denotes a branch from the first bus 23 for drawing into the second tank 17. The first bus branch connector 25 is a second bus for three phases arranged in the horizontal direction at the rear part of the

second tank

17, and 26 is branched from the second bus 25 to the second This is a second bus branch connector for drawing into the tank 17.

27 is a first busbar connection bushing, one end of which penetrates the ceiling plate of the second tank 17 in an airtight manner upward and is connected to the first busbar branch connector 24. Reference numeral 28 denotes a second busbar connection bushing, one end of which penetrates the rear plate of the second tank 17 in a gastight manner to the rear portion and is connected to the second busbar branch connector 26.

29 is a main circuit conductor for connecting a terminal to the other end of the first bus connection bushing 27 and one of the third disconnector / ground switch 21 via the

connector

30, and 31 is a third disconnector / ground switch. A connection conductor connecting the other terminal of the switch 21 and one terminal of the second disconnector /

ground switch

19, 32 is a main circuit conductor connected to the other end of the second

bus connection bushing

28, and 33 is A main circuit conductor that connects between a connection conductor 31 that connects one terminal of the second disconnector / ground switch 19 and the other terminal of the third disconnector / ground switch 21 and a main circuit conductor 32. It is. The other terminal of the second disconnector / ground switch 19 is connected to the other terminal of the vacuum circuit breaker 3 via an insulating spacer 35 disposed between the connector 34 and the first tank 1 and the second tank 17. Connected to the terminal.

36 is an outer box that forms the outer shape of the gas insulated switchgear surrounding the outer peripheries of the first tank 1 and the second tank 17, and includes a door 37 that is open on the left side in FIG.

38 is a cable drawn from the upper part of the gas insulated switchgear, and has a cable head 39 connected to the cable connecting bushing 7 at the tip. Reference numeral 40 denotes a CT (current transformer) that is installed in the upper part of the outer box 36 and is arranged in such a manner that the cable 38 penetrates the inside of the outer box 36, and detects a current flowing through the cable 38.

FIG. 2 is a cross-sectional view taken along line AA in FIG. In FIG. 2, 17 a and 17 b are side walls of the

second tank

17, and 41 is an upper wall plate constituting the ceiling of the first tank 1. Reference numeral 42 denotes a bottom wall plate of the first tank 1, for example, a substantially U-shaped lower wall plate arranged so as to protrude downward in an arc shape, and 43 and 44 are side wall plates on both sides of the first tank 1. Yes, it is formed in an arc shape in the X direction which is the horizontal direction in the front-rear direction and the Y direction in the vertical direction. The front and

rear end portions

43a, 44a, 43b, and 44b of the

side wall plates

43 and 44 are narrowed inward, and the upper and

lower end portions

43c, 44c, 43d, and 44d of the

side wall plates

43 and 44 are narrowed inward. It has a shape. Further, as an example, the drawing is provided with extending portions 46e and 44e extending downward from the

lower end portions

43d and 44d of the

side wall plates

43 and 44, respectively. 47 is a lower wall of the

second tank

17, and 48 is a penetrating main circuit conductor that penetrates the insulating spacer 35 in the vertical direction.

FIG. 3 is a sectional view taken along line BB in FIG. In FIG. 3, reference numeral 45 denotes a front end plate that is attached to the front end surface of the first tank 1 and hermetically closes the front end of the first tank 1. A rear end plate 46 is attached to the rear end surface of the first tank 1 and hermetically closes the rear end of the first tank 1. The front end plate 45 and the rear end plate 46 have such a size that both sides and the lower portion protrude outward from the

side wall plates

43 and 44 and the lower wall plate 42. Further, the insulating spacer 35 sandwiched between the upper wall plate 41 of the first tank 1 and the lower wall 47 of the second tank 17 and arranged as a part of the airtight wall penetrates in the vertical direction in FIG. A through main circuit conductor 48 is provided.

Reference numerals

51 and 52 denote reinforcing bones arranged and fixed on the upper wall plate 41 of the first tank 1. Reference numeral 62 denotes a support bone disposed and fixed to the lower wall 47 of the upper second tank 17 loaded on the upper side of the first tank 1, and abuts against the upper wall plate 41 of the first tank 1. Thus, the second tank 17 is supported together with the reinforcing

bones

51 and 52.

FIG. 4 is a perspective view showing the first tank 1 arranged on the lower side of the gas insulated switchgear according to Embodiment 1 of the present invention. In FIG. 4, 41 is a flat upper wall plate, 42 is a lower wall plate, 43 and 44 are side wall plates, 45 is a front end plate, and 46 is a rear end plate. Reference numeral 49 denotes a flange that reinforces the periphery of an elliptical opening formed in the upper wall plate 41 of the first tank 1, and screw holes 50 for fixing the insulating spacer 35 are arranged at equal intervals.

FIG. 5 is a cross-sectional view taken along the line CC of FIG. In FIG. 5, the side wall plate 43 (not shown) and the side wall plate 44 are arranged, for example, at the center thereof at substantially the same position as the width direction end portions of the front end plate 45 and the rear end plate 46. Both side portions of the side wall plate 43 (not shown) and the side wall plate 44 are displaced inward by d from the width direction ends of the front end plate 45 and the rear end plate 46. It forms in circular arc shape toward the both ends from the center part of the board 43 (not shown) and the side wall board 44. As shown in FIG.

In other words, the side wall plate 43 (not shown) and the central portion of the side wall plate 44 project most outward in the central portion of the first tank 1 are the front end plate 45 and the rear end plate. 46, and the front end plate 45 and the rear end plate 46, the side wall plate 43 (not shown), and the side wall plate 44. The displacement dimension in which the position of the joint portion is displaced in an arc shape inward from the width direction end portions of the front end plate 45 and the rear end plate 46 is d. As shown in FIG. 5, the maximum widths of the front end plate 45 and the rear end plate 46 are determined by the front end plate 45, the rear end plate 46, the side wall plate 43 (not shown), and the side wall plate 44. By positioning outward from the position of the joint, tank fastening using bolts is facilitated.

6 is a front view seen from the direction D of FIG. 4, and FIG. 7 is a right side view of FIG. In each of these drawings, 53 is a window-like flange plate to which the mounting plate 2 is attached, 54 is a foot plate that is joined to the lower rear portion of the flange plate 53 and extends downward, and projects downward from the

lower wall plate

42, 55 is a fastening hole for attaching the mounting plate 2 to the

flange plate

53, and 56 is an operation hole for operating the lightning arrester 12. These constitute a front end plate 45.

8 is a front view seen from the direction E of FIG. 4, and FIG. 9 is a right side view of FIG. In each of these drawings, 57 is a rear closing plate for closing the rear end side of the

first tank

1, 58 is joined to the lower side rear portion of the rear closing plate 57 and extends downward, and further below the lower wall plate 42. A protruding foot plate 59 is a hole for connecting the cable 38. These constitute the rear end plate 46.

10 is a front view showing the side wall plate 44 viewed from the direction F of FIG. 4, FIG. 11 is a right side view of FIG. 10, FIG. 12 is a bottom view of FIG. FIG. 14 is a sectional view taken along the line HH of FIG. 10, and FIG. 15 is a perspective view showing the side wall plate 44. As shown in FIG. 10, the side wall plate 43 (not shown) and the side wall plate 44 are line-symmetric with respect to the vertical axis at the middle portion in the front-rear direction of the first tank 1. It has a shape. For this reason, in FIG. 2, the configuration of the side wall plates disposed on the right side wall plate 44 and the left side wall plate 43 can be shared as one type of component. Therefore, it is possible to use one type of press mold when manufacturing the side wall plate 43 and the side wall plate 44, and to reduce the manufacturing cost.

Further, in FIG. 10, the lower right portion and the lower left portion on the drawing

form cutout portions

44f and 44g cut out by the dimension e and the dimension f, respectively. That is,

notch portions

44f and 44g are formed by cutting out the lower right portion and the lower left portion of the side wall plate 43 and the side wall plate 44 by the dimension e and the dimension f, respectively, and the length of the lower wall plate 42 in the front-rear direction. Is shorter than the length of the side wall plate 43 and the side wall plate 44 in the front-rear direction, and the position on the lower side of the front end plate 45 and the position on the lower side of the rear end plate 46 are the front end plate 45 and the rear end. By arranging so as to be located inside the plate 46, the volume of the first tank 1 can be reduced.

Further, as shown in FIG. 13, the side wall plates 43 and the side wall plates 43 are displaced inward by a dimension g from the maximum width of the upper wall plate 41 of the first tank 1 of the

side wall plates

43 and 44. (Not shown) and a side wall plate 44 is formed in a circular arc shape from the central portion toward the vertical end portion. Further, in FIG. 15, the side wall plate 44 formed by press bending from a thin plate is connected to the front end plate 45 of the

end portions

44 a and 44 b in the X-axis direction which is the horizontal direction in the front-rear direction of the first tank 1. In addition, it is formed in an arc shape inwardly of the maximum width of the rear end plate 46, and the

end portions

44 c and 44 d are positioned inward of the maximum width of the upper wall plate 41 in the Y-axis direction that is the vertical direction of the first tank 1. It is formed in an arc shape in the direction. An extension 44e extending downward from the end 44d of the side wall plate 44 is provided. The side wall plate 43 is also configured in the same shape as the side wall plate 44.

FIG. 16 is a sectional view taken along line JJ in FIG. In FIG. 16, the lower wall plate 42 has a U-shaped cross section, and both wall

upper portions

42 a and 42 b of the lower wall plate 42 rise upward, and the width decreases in the central direction in an arc shape from the upper side. The side wall plate 43 extending to the side wall and the

extended portions

43e and 44e of the side wall plate 44 are joined together. As can be seen from FIG. 16, these joints are formed as

concave portions

60, 61 that are recessed inside the first tank 1 and extend from the front portion to the rear portion of the first tank 1, and these

concave portions

60, 61 are formed in the first tank 1. The effect of improving the strength of one tank 1 is exhibited.

FIG. 17 is a side view showing the first tank 1 corresponding to FIG. 3, and FIG. 18 is a cross-sectional view taken along the line KK of FIG. An insulating spacer 35 is provided on the upper wall plate 41 of the first tank 1, and a penetrating main circuit conductor 48 that penetrates the insulating spacer 35 in the vertical direction is provided. Reinforcing

bones

51 and 52 are fixed to the upper wall plate 41 of the first tank 1.

Ends

43c and 44c on the upper side in the Y-axis direction, which is the vertical direction of the first tank 1 of the side wall plate 43 and the side wall plate 44, are formed in an arc shape inward from the maximum width of the upper wall plate 41. is doing. That is, the first tank using the bolt is configured by positioning the maximum width of the upper wall plate 41 outward from the position of the joint between the upper wall plate 41 and the side wall plate 43 and the side wall plate 44. Fastening between the first tank 2 and the second tank 17 is facilitated.

19 is a side view showing a second tank corresponding to FIG. 3, and FIG. 20 is a cross-sectional view taken along line LL in FIG. The lower wall 47 of the second tank 17 is provided with a support bone 62 that supports the second tank 17 by contacting the upper wall plate 41 of the first tank 1. The second tank 17 is supported together with the reinforcing

bones

51 and 52 which are arranged and fixed on the upper wall plate 41.

FIG. 21 is a sectional view taken along line MM in FIG. The side portion 41a of the upper wall plate 41 of the first tank 1 is located outward from the

end portions

43c and 44c formed by being displaced inwardly in an arc shape on the upper side of the

side wall plates

43 and 44. The side portion 47 a of the lower wall 47 of the second tank 17 is located outward from the

side walls

17 a and 17 b of the second tank 17, and the support bone 62 provided on the lower wall 47 of the second tank 17 is also the first one. The tank 1 extends to the side portion 41 a of the upper wall plate 41 and the side portion 47 a of the lower wall 47 of the second tank 17. For example, the spacer 63 is sandwiched between the support bone 62 and the side portion 41 a of the upper wall plate 41 of the first tank 1, and the bolt 65 is screwed into the screw hole 64 formed in the support bone 62. The first and second tanks 17 are firmly fastened to each other.

22 is a cross-sectional view taken along line NN in FIG. The side portion 41a of the upper wall plate 41 of the first tank 1 is located outward from the

end portions

side wall plates

side walls

17 a and 17 b of the second tank 17, and the reinforcing bone 52 provided on the upper wall plate 41 of the first tank 1 is also the first. The tank 1 extends to the side 41 a of the upper wall plate 41 and the side 47 a of the lower wall 47 of the second tank 17. Then, for example, a spacer 66 is sandwiched between the reinforcing bone 52 and the side portion 41 a of the upper wall plate 41 of the first tank 1, and a bolt 68 is screwed into a screw hole 67 formed in the reinforcing bone 52, so that the first tank The first and second tanks 17 are firmly fastened to each other.

FIG. 23 is a cross-sectional view taken along the line PP in FIG. The side portion 41a of the upper wall plate 41 of the first tank 1 is located outward from the

end portions

side wall plates

side walls

17 a and 17 b of the second tank 17, and is inward of the

end portions

43 c and 44 c of the upper wall plate 41 of the first tank 1. A flange 69 having a bolt housing part 69a is provided on the upper wall of the first tank 1, and a flange 70 having a bolt housing part 70a is provided on the inner side of the

side wall

17a, 17b of the lower wall 47 of the second tank 17. The insulating spacer 35 is sandwiched between the flange 69 and the flange 70 provided on the plate 41 and the lower wall 47 of the second tank 17, and screws are formed at portions of the insulating spacer 35 located at the

bolt accommodating portions

69 a and 70 a, respectively. The buried metal plates 71 and 72 are arranged, and

bolts

73 and 74 are screwed into these buried metal particles 71 and 72, so that the upper wall plate 41 of the first tank 1 and the lower wall 47 of the second tank 17 and the insulating spacer 35 are strengthened. It is concluded to.

As described above, the

side wall plates

43 and 44 are formed in an arc shape in the X direction which is the horizontal direction in the front-rear direction and the Y direction in the vertical direction, and are also in the horizontal direction in the front-rear direction of the first tank 1. These

end portions

44 a and 44 b are formed in an arc shape inward of the maximum width of the front end plate 45 and the rear end plate 46 in the X-axis direction, and in the Y-axis direction that is the vertical direction of the first tank 1. By forming the first tank 1 by forming the

end portions

44c and 44d in an arc shape inwardly from the maximum width of the upper wall plate 41, a lightweight, high-strength and compact gas insulated switchgear is provided. Obtainable.

Further, the

side wall plates

43 and 44 are formed in an arc shape in the X direction that is the horizontal direction in the front-rear direction and the Y direction in the vertical direction, and in the X-axis direction that is the horizontal direction in the front-rear direction of the first tank 1. These

end portions

44 a and 44 b are formed in an arc shape inwardly of the maximum width of the front end plate 45 and the rear end plate 46, and the end portions 44 c in the Y-axis direction that is the vertical direction of the first tank 1. , 44d are formed in a circular arc shape inward from the maximum width of the upper wall plate 41 to constitute the first tank 1, and the second tank 17 is placed on the upper side of the first tank 1. Further, it is possible to obtain a gas insulated switchgear having high strength and capable of making the tank stacking structure compact.

Further, the arcuate tops, which are the central portions of the side wall plate 43 and the side wall plate 44 formed in an arc shape, are substantially equal to the maximum width direction dimensions of the front end plate 45 and the rear end plate 46. By making it smaller than that, the gas insulated switchgear can be made compact when arranged side by side in the horizontal direction.

Further, the front end plate 45 is joined to the flange plate 53, a foot plate 54 that is joined to the lower rear portion of the flange plate 53 and extends downward, and projects downward from the lower wall plate 42, and a fastening hole 55. The foot plate 54 protrudes downward from the lower wall plate 42, and the rear end plate 46 is joined to the rear closing plate 57 and the lower rear portion of the rear closing plate 57. And a foot plate 58 projecting downward from the lower wall plate 42 and a hole 59 for connecting the cable 38, and the foot plate 58 projecting downward from the lower wall plate 42. As a result, the foot plate 54 and the foot plate 58 of the front end plate 45 and the rear end plate 46 are arranged so as to protrude downward from the lower wall plate 42, so that the feet of the front end plate 45 and the rear end plate 46 are arranged. Gas insulation opening and closing of the first tank 1 with the plate 54 and the foot plate 58 Can be suspended secured by freestanding base of the location, it is possible to easily configure the arrangement of the gas insulated switchgear.

Further, the lower wall plate 42 is arranged so as to protrude downward in an arc shape, so that the dust in the first tank 1 can be accumulated in the lower center of the first tank 1. Thereby, since there is no dust between the both-side phase of the charging unit and the

side wall plates

43 and 44 of the first tank 1, the space insulation distance between the grounds can be reduced and the width of the first tank 1 can be reduced. At the same time, the lower part of the first tank 1 has the lower part of the central part of the charging unit projecting downward in a circular arc shape to accumulate dust, thereby ensuring the space insulation distance between the central phase and the first tank 1. Therefore, the first tank 1 can be downsized (outer dimensions, volume).

The lower wall plate 42 has a U-shaped cross section, and both wall

upper portions

42a and 42b of the lower wall plate 42 rise upward, decrease in width toward the center from the upper side in an arc shape, and extend downward. The side wall plate 43 and the

extended portions

43e and 44e of the side wall plate 44 are joined, and these joined portions are recessed inside the first tank 1 and extend from the front part to the rear part of the first tank 1. It is comprised as the

parts

60 and 61, and the strength improvement of the 1st tank 1 can be aimed at by these recessed

parts

60 and 61. FIG.

Further, since the lower wall plate 42 is formed in a U-shape, the U-shaped

upper portions

42a and 42b of the lower wall plate 42, the side wall plates 43, and the

extended portions

43e and 44e of the side wall plates 44, Can be easily joined, whereby the

concave portions

60 and 61 can be easily formed.

Further,

notches

44f and 44g are formed by cutting out the lower right portion and the lower left portion of the side wall plate 43 and the side wall plate 44 by the dimension e and the dimension f, respectively, and the length of the lower wall plate 42 in the front-rear direction is formed. Is shorter than the length of the side wall plate 43 and the side wall plate 44 in the front-rear direction, and the position on the lower side of the front end plate 45 and the position on the lower side of the rear end plate 46 are the front end plate 45 and the rear end. By arranging so as to be located inside the plate 46, the volume of the first tank 1 can be reduced and the strength of the first tank 1 can be improved. The installation area can be reduced.

Further, the side wall plate 43 and the side wall plate 44 have a line-symmetric shape that is symmetrical with respect to the vertical axis at the middle portion in the front-rear direction of the first tank 1. And as a structure of the side part wall board arrange | positioned at the side part wall board 44, it can share as one kind of components. Therefore, it is possible to use one type of press mold when manufacturing the side wall plate 43 and the side wall plate 44, and the same member is used for the left and right side wall plates 43 and the side wall plates 44. Therefore, the types of parts can be reduced, the types of press dies for manufacturing parts can be reduced, and the manufacturing cost can be reduced.

Further, reinforcing

bones

51 and 52 are arranged on the upper wall plate 41 of the first tank 1 in the width direction of the first tank 1, and the second tank 17 is supported via the reinforcing

bones

51 and 52. As a result, the load of the second tank 17 placed on the upper side of the first tank 1 can be easily transmitted via the reinforcing

bones

51 and 52 and the second tank 17 can be supported. Multiple stacking configurations are simplified.

In the present invention, the embodiments can be freely combined, or the embodiments can be appropriately modified or omitted within the scope of the invention.

The present invention is suitable for realizing a lightweight and compact gas insulated switchgear by forming both side wall plates of the tank in an arc shape in the horizontal and vertical directions before and after the tank.

Claims

In the gas insulated switchgear having a first tank in which a circuit breaker is housed and in which an insulating gas is enclosed, the first tank includes an upper wall plate, a lower wall plate facing the upper wall plate, A pair of side wall plates that are respectively attached between the upper wall plate and the lower wall plate and are curved in an arc shape in the horizontal and vertical directions in the front-rear direction, the upper wall plate, and the lower wall A front end plate for closing a front side of a frame formed by a plate and the pair of side wall plates, and the upper wall plate, the lower wall plate, and the pair of side wall plates. A gas insulated switchgear comprising a rear end plate for closing a rear side of the frame.
In the gas insulated switchgear having a first tank in which a circuit breaker is housed and in which an insulating gas is enclosed, the first tank includes an upper wall plate, a lower wall plate facing the upper wall plate, A pair of side wall plates that are respectively attached between the upper wall plate and the lower wall plate and are curved in an arc shape in the horizontal and vertical directions in the front-rear direction, the upper wall plate, and the lower wall A front end plate for closing a front side of a frame formed by a plate and the pair of side wall plates, and the upper wall plate, the lower wall plate, and the pair of side wall plates. A gas insulated opening and closing comprising a rear end plate that closes a rear side of the frame body, and a second tank that is placed on the upper side of the first tank and in which a busbar portion and the like are disposed. apparatus.
3. The arcuate top portions of the pair of side wall plates are arranged so as not to protrude outwardly from the widths of the front end plate and the rear end plate. Gas insulated switchgear.
The gas insulated switchgear according to claim 1 or 2, wherein a lower side of the front end plate and a lower side of the rear end plate are arranged to protrude downward from the lower wall plate.
3. The gas insulated switchgear according to claim 1, wherein the lower wall plate is disposed so as to protrude downward in an arc shape.
The lower side of the pair of side wall plates is provided with an extension portion extending downward, the width of the lower wall plate is set as the width of the extension portion of the pair of side wall plates, and the lower wall plate and the extension portion, The gas-insulated switchgear according to claim 1, wherein a concave portion extending in the front-rear direction is formed.
The gas insulated switchgear according to claim 6, wherein the lower wall plate has a substantially U shape with a cross section opened upward.
The length of the lower wall plate in the front-rear direction is made shorter than the length of the pair of side wall plates in the front-rear direction, and the position of the lower side of the front end plate and the position of the lower side of the rear end plate are The gas-insulated switchgear according to claim 4, wherein the gas-insulated switchgear is arranged so as to be located inside a part end plate and the rear end plate.
3. The gas insulated switchgear according to claim 1, wherein the pair of side wall plates are configured to be line-symmetric with respect to a vertical axis at an intermediate portion in the front-rear direction of the first tank. .
3. The reinforcing bone according to claim 2, wherein a reinforcing bone is disposed on the upper wall plate in the width direction of the first tank, and the second tank is supported via the reinforcing bone. The gas insulated switchgear described.