JP5108144B2 - Switchgear - Google Patents

Description

The present invention relates to a switchgear having a plurality of cases in which, for example, a gas insulated switch is installed, and more particularly to a connection structure between the cases of the switchgear.

Examples of conventional switch gears include those shown in FIGS. FIG. 21 is a front view of the switch gear, FIG. 22 is a side sectional view of the switch gear, FIGS. 23 and 24 are perspective views for explaining that the switch gear housing is divided into four housings, and FIG. FIG. 26 is a cross-sectional view taken along the line XX of FIG. 25, and FIGS. 27 to 29 are cross-sectional views showing the connection structure of the Y part or the Z part in FIG.

In each of these drawings, the switchgear casing is divided into four casings to form a plurality of compartments. A pull-out type circuit breaker 5 is housed in a circuit breaker chamber 39 provided in the approximate center of the switchgear. A bushing mounting frame that forms a wall in the depth direction of the circuit breaker chamber 39 is provided with a bushing 6 that is electrically connected to two high-voltage circuits.

One bushing 6 is electrically connected to the main bus 1 via the branch conductor 2 in the main bus chamber 40. The branch conductor 2 is insulated and supported from the mounting frame 4 by the insulator 3. The other bushing 6 is electrically connected to a cable 10 connected to an external device via an instrument current transformer 8 and a branch conductor 9 in the cable chamber 41. The pull-out type circuit breaker 5 connects a connector 5 a provided on the back surface to a fixed contact in the bushing 6. A ground switch 11 is provided below the bushing 6.

Above the circuit breaker chamber 39, there is provided a control chamber 15 in which a protection relay, a meter, and a switch for opening and closing the vacuum circuit breaker are accommodated. In addition, a ceiling pressure release flapper 12 that releases a pressure equal to or higher than a predetermined value is provided on the ceiling of the circuit breaker chamber 39 in order to alleviate an increase in internal pressure at the time of failure inside the switchgear. Further, a cable pit 17 for accommodating a control cable and a main circuit cable is dug in a floor of a factory or the like where the switch gear is installed.

The pull-out type circuit breaker 5 is placed on the circuit breaker cradle floor plate 7 and is movable in the front-rear direction (the left-right direction in FIG. 22) toward the switch gear by a wheel 5c attached to the lower part. The pull-out type circuit breaker 5 is normally positioned at the connection position shown in FIG. 22 and is connected to a main circuit as a high-voltage electric circuit formed by the cable 10 and the main bus 1 extending to an external device and operates as a circuit breaker. . Furthermore, the drawer type circuit breaker 5 also functions as an interlock that prevents the ground switch 1 from being turned on when in the connected position. On the other hand, for example, during maintenance / inspection of an external device (not shown) to which the cable 10 is connected, it is pulled out by an operator and moved to the left in FIG. 22 by a predetermined distance from the connection position shown in FIG. It is positioned at the disconnection position, is separated from the bushing 6, and allows the grounding switch 11 to be turned on.

The switchgear housing is composed of four housings: a control room housing 18, a circuit breaker room housing 19, a main bus room housing 20, and a cable room housing 21.

During normal operation of such a conventional switchgear, an internal short circuit accident may occur due to various causes, although it is extremely rare. When an internal short-circuit accident occurs, it is conceivable that a rapid internal pressure increase or high-temperature gas is generated due to arc energy. In consideration of these, various connection structures between the housings have been proposed.

In addition, assuming that such an internal short circuit accident occurs, the switchgear structure has a strength capable of withstanding a sudden internal pressure rise that occurs in the event of an internal short circuit accident, and the generated high temperature gas is It is necessary to have a structure that suppresses the ejection from the outside. It is often necessary to quickly restore the switch gear after an internal short circuit accident.

If it is possible to reduce the impact of the accident on the control room and the impact on the switch gear other than the switch gear that caused the accident It becomes possible to reduce the time required for the restoration work of the switch gear.

In addition, the switchgear housing is divided into several parts, regardless of whether or not it has arc-proof performance, due to the limitations of the outer shape of the metal plate that is the material and the drilling, bending, and cutting operations for processing the metal plate. Is common.

By the way, in a switchgear having a structure as disclosed in Japanese Patent Application Laid-Open No. 2004-350442, a pressure release flapper 12 is provided on the ceiling, and a pressure increase in the switchgear that occurs when an internal short circuit accident occurs is reduced. In general, a technique of suppressing by opening 12 is taken. However, the influence of the pressure increase in the switchgear cannot be completely eliminated, and when an internal accident occurs, it is affected by the pressure increase.

FIG. 27 shows a joint portion for connecting the conventional general casings. For example, the connecting plate 20b bent in the orthogonal direction from the frame 20a of the main bus chamber casing 20, and the cable chamber casing 21, for example. By fastening the connecting plate 21b bent in the orthogonal direction from the frame 21 with bolts 24 and nuts 25, which are fastening bodies, the main bus chamber housing 20 and the cable chamber housing 21 become an integral component. The other casings are similarly connected to form a switchgear casing.

For example, FIG. 28 is provided with a mounting plate 20c obtained by further bending the connecting plate 20b bent in the orthogonal direction from the frame 20a of the main bus chamber housing 20 so as to be parallel to the frame 20a. It is used to support each component housed in the bus bar housing 20. FIG. 29 shows not only the main bus chamber case 20 side, but, for example, a mounting plate 21b that is bent in a direction orthogonal to the frame 21 of the cable chamber case 21 and further bent in parallel with the frame 21a. 21c is provided, and is used, for example, to support each component housed in the cable chamber housing 21.

Such a joint shown in FIGS. 27 to 29 is fastened at only one point in the orthogonal direction, and easily deforms when the pressure rises. As a result, the hot gas flows out of the switchgear as indicated by an arrow 26. There is a possibility that. Therefore, in such a case frame fastening structure, a frame is added to the fastening portion to increase the rigidity of the fastening portion, or the fastening locations in the depth direction in FIGS. 27 to 29 are increased. It may be possible to relieve stress when the internal pressure rises. Further, as shown in FIG. 24, side covers 22 and 23 are provided outside the case fastening portion to take measures such as increasing the strength of the case and preventing outflow of high-temperature gas to the outside of the switchgear. ing. When the switchgear is arranged in parallel with other switchgears, a cover is not provided between the switchgear arrangements, but a side cover is attached only at the end of the arrangement, and hot gas is exposed to the outside of the switchgear. In general, the structure prevents leakage.

JP 2006- 211788 A JP 2004-350442 A

However, in the conventional switchgear described above, joint plates bent in the orthogonal direction from two adjacent casing frames are connected by bolts 24 and nuts 25 that are fastening bodies. The part is fastened at only one point in the orthogonal direction, and is easily deformed when the pressure rises. As a result, there is a problem that the hot gas may flow out of the switchgear.

Furthermore, a partition frame for partitioning in the switchgear, a support frame for fixing an insulator for supporting the busbar in the switchgear, and a support for fixing a current transformer for an instrument attached to the busbar. The problem is that the structure can be easily attached when the frame of the joint portion is fixed as the support frame.

The present invention has been made to solve the above-described problems, and an object thereof is to obtain a switchgear having a highly reliable connection structure and a simple mounting structure.

The switchgear according to the present invention includes a first frame body of the first housing, a second frame body of the second housing, From the 1st board part bent in the orthogonal direction from 1 frame body, the 2nd board part bent in the orthogonal direction so that it may become parallel to the 1st frame body from the 1st board part, and from the 2nd frame body a third plate portion joined to the first plate portion which is bent in the orthogonal direction, are bent to be parallel to the second frame member with the second plate portion in the same direction from the third plate portion second plate A fourth plate part joined to the first part, a first fastening body for fastening the first plate part and the third plate part, and a second fastening body for fastening the second plate part and the fourth plate part. It is a thing.

Further, in the switch gear formed by connecting at least the first housing and the second housing, the first frame body of the first housing, the second frame body of the second housing, and the orthogonal direction from the first frame body A first plate portion bent in the first direction, a second plate portion bent in the orthogonal direction so as to be parallel to the first frame body from the first plate portion, and a second plate portion bent in the orthogonal direction from the second frame body. A third plate portion joined to the first joint portion, and a fourth plate portion bent in an orthogonal direction so as to be parallel to the second frame body in a direction opposite to the second plate portion from the third plate portion. A plate-like frame body joined to the second plate portion and the fourth plate portion, a first fastening body for fastening the first plate portion and the third plate portion, and a second plate portion and the plate-like frame body. A second fastening body to be fastened and a third fastening body for fastening the fourth plate portion and the plate-like frame body are provided.

The switchgear according to the present invention provides a switchgear having a highly reliable connection structure and a simple mounting structure by providing a plurality of joint portions of two adjacent housing frames in the orthogonal direction. Can do.

It is a front view of the switchgear concerning Embodiment 1 of this invention. It is a sectional side view of the switchgear concerning Embodiment 1 of this invention. It is a perspective view which shows the housing structure of the switchgear concerning Embodiment 1 of this invention. It is a front view which shows the housing structure of the switchgear concerning Embodiment 1 of this invention. It is a side view which shows the housing structure of the switchgear concerning Embodiment 1 of this invention. FIG. 5 is a cross-sectional view taken along line VI-VI in FIG. 4, illustrating a switchgear casing structure according to Embodiment 1 of the present invention.

It is sectional drawing in the VII-VII line of FIG. 5 which shows the housing structure of the switchgear concerning Embodiment 1 of this invention. It is sectional drawing which shows the connection structure of the A section or B section of FIG. 7 of the switchgear concerning Embodiment 1 of this invention. It is sectional drawing which shows the connection structure of the A section or B section of FIG. 7 of the switchgear concerning Embodiment 2 of this invention. It is a perspective view which shows the connection structure of the housing | casing of the switchgear concerning Embodiment 2 of this invention. It is a perspective view which shows the connection structure of the housing | casing of the switchgear concerning Embodiment 2 of this invention. It is sectional drawing which shows the connection structure of the A section or B section of FIG. 7 of the switchgear concerning Embodiment 3 of this invention. It is sectional drawing which shows the connection structure of the A section or B section of FIG. 7 of the switchgear concerning Embodiment 4 of this invention.

It is a principal part front view which shows the housing | casing connection part of the switchgear concerning Embodiment 5 of this invention. It is sectional drawing in the XV-XV line | wire of FIG. 14 which shows the housing | casing connection part of the switchgear concerning Embodiment 5 of this invention. It is sectional drawing which shows the principal part of the example of attachment of the switchgear concerning Embodiment 5 of this invention. It is sectional drawing which shows the principal part of the example of attachment of the switchgear concerning Embodiment 5 of this invention. It is a perspective view which shows the principal part of the example of attachment of the switchgear concerning Embodiment 6 of this invention. It is sectional drawing which shows the principal part of the example of attachment of the switchgear concerning Embodiment 6 of this invention. It is sectional drawing which shows the principal part of the example of attachment of the switchgear concerning Embodiment 6 of this invention.

It is a front view which shows the conventional switchgear. It is a sectional side view which shows the conventional switchgear. It is a perspective view explaining that the housing | casing of the conventional switchgear is divided | segmented into four housings. It is a perspective view explaining that the housing | casing of the conventional switchgear is divided | segmented into four housings. It is a side view of the housing | casing of the conventional switchgear. It is sectional drawing in the XX line of FIG. 25 of the conventional switchgear. It is sectional drawing which shows the connection structure of the Y part or Z part in FIG. 26 of the conventional switchgear. It is sectional drawing which shows the other joint part of the conventional switchgear. It is sectional drawing which shows the other joint part of the conventional switchgear.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to FIGS. 1 is a front view of a switchgear according to Embodiment 1 of the present invention, FIG. 2 is a side sectional view of the switchgear according to Embodiment 1 of the present invention, and FIG. 3 is a switch according to Embodiment 1 of the present invention. 4 is a perspective view showing a gear housing structure, FIG. 4 is a front view showing a switch gear housing structure according to the first embodiment of the present invention, and FIG. 5 is a switch gear housing according to the first embodiment of the present invention. FIG. 6 is a side view showing the structure, FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4 showing the casing structure of the switch gear according to the first embodiment of the present invention, and FIG. 7 is a switch according to the first embodiment of the present invention. FIG. 8 is a sectional view taken along line VII-VII in FIG. 5 showing the housing structure of the gear, and FIG. 8 is a sectional view showing the connection structure of the A part or B part in FIG. 7 of the switchgear according to Embodiment 1 of the present invention. .

In these drawings, 1 is a main bus line, 2 is a branch conductor, 3 is an insulator, 4 is a mounting frame, 5 is a pull-out type circuit breaker, 6 is a bushing, 8 is a current transformer for an instrument, 9 is a branch conductor, The pressure release flapper, 15 is a control room, 39 is a circuit breaker room, 40 is a main bus room, 41 is a cable room, and the control room 15 is detachably provided in the upper part of the circuit breaker room 39, for example.

51 is a control room casing, 52 is a circuit breaker room casing, 53 is a main bus room casing, 54 is a cable room casing, and the control room casing 51 is an example of the circuit breaker casing 52. A part of the main bus chamber casing 53 is configured as a circuit breaker chamber casing 52 that is detachably provided at the top. The lower part of the circuit breaker chamber casing 52 constitutes a part of the cable chamber casing 54.

For example, a structure as shown in FIG. 8 can be realized as a structure for connecting the housings to prevent the hot gas from flowing out of the switchgear. As an example, the figure describes the connection between a main bus chamber casing 53 as a first casing and a cable chamber casing 54 as a second casing. 53a is a first frame body of the main bus chamber housing 53, 53b is a first plate portion bent in an orthogonal direction from the first frame body 53a, 54a is a second frame body of the cable chamber housing 54, and 54b is It is the 2nd board part bent in the orthogonal direction from this 2nd frame body 54a. 55 and 56 are bolts and nuts as first fastening bodies that fasten the first plate portion 53b and the second plate portion 54b, 57 and 58 are arranged in a direction orthogonal to the bolts 55 and nuts 56 as the first fastening body, A bolt and a nut as a second fastening body for fastening the first plate portion 53b and the second plate portion 54b.

In the first embodiment, the first plate portion 53b bent in the orthogonal direction from the first frame body 53a of the main bus chamber casing 53 and the second frame body 54a of the cable chamber casing 54 are folded in the orthogonal direction. The bent second plate portion 54b is fastened with bolts 55 and nuts 56 as first fastening bodies and bolts 57 and nuts 58 as second fastening bodies at two locations in the orthogonal direction. Therefore, the sealing effect between the first plate portion 53b and the second plate portion 54b is remarkably improved and the strength of the coupling portion is also improved.

As a result, it is possible to prevent the high temperature gas from flowing out of the switchgear as shown by the arrow 26 at the time of the pressure rise caused by the internal short circuit accident, and to prevent the high reliability. A switch gear having a connection structure can be obtained.

Embodiment 2. FIG.
A second embodiment of the present invention will be described with reference to FIG. In FIG. 9, the connection between the main bus chamber casing 53 as the first casing and the cable chamber casing 54 as the second casing will be described. 53a is a first frame body of the main bus chamber housing 53, 53b is a first plate portion bent in the orthogonal direction from the first frame body 53a, and 53c is bent in the orthogonal direction from the first plate portion 53b. The second plate portion 54a is a second frame body of the cable chamber housing 54, 54c is a third plate portion bent in an orthogonal direction from the second frame body 54a, and 54d is a second plate portion from the second plate portion 54c. The fourth plate portion is bent in the same direction as the portion 53c, that is, in an orthogonal direction so as to be parallel to the second frame body 54a. Reference numerals 59 and 60 denote bolts and nuts as first fastening bodies that fasten the first plate portion 53b and the third plate portion 54c, and reference numerals 61 and 62 denote second plates extending further in the orthogonal direction from the positions of the bolt 59 and the nut 60. A bolt and a nut as a second fastening body for fastening the portion 53c and the fourth plate portion 54d. As is clear from FIG. 9, the second frame body 54a, the third plate portion 54c, and the fourth plate portion 54d of the cable chamber casing 54 are U-shaped, and the main bus chamber casing is along the U-shape. The first plate portion 53b and the second plate portion 53c of the first frame body 53a of the body 53 are bent.

In the second embodiment, the first plate portion 53b bent in the orthogonal direction from the first frame body 53a of the main bus chamber casing 53 and the second frame body 54a of the cable chamber casing 54 are folded in the orthogonal direction. The bent third plate portion 54c is fastened with a bolt 59 and a nut 60 as a first fastening body, and further bent and extended in the orthogonal direction from the first plate portion 53b and the third plate portion 54c. Since the second plate portion 53c and the fourth plate portion 54d are fastened by the bolt 61 and the nut 62 as the second fastening body, and between the first plate portion 53b and the third plate portion 54c, and The sealing effect between the second plate portion 53c and the fourth plate portion 54d is remarkably improved and the strength of the coupling portion is also improved. Note that the outflow path of the high-temperature gas is a straight traveling direction in the above-described first embodiment, but in this second embodiment, the outflow path is bent, that is, deflected at right angles, and is sealed more than the above-described first embodiment. The effect is further exhibited.

As a result, it is possible to prevent the high temperature gas from flowing out of the switchgear as shown by the arrow 26 at the time of the pressure rise caused by the internal short circuit accident, and to prevent the high reliability. A switch gear having a connection structure can be obtained.

10 and 11 are perspective views showing the connection structure of the switchgear housing. As shown in FIG. 10, for example, the first frame body 53a of the main bus chamber housing 53 includes a cable chamber housing. 54, the first plate portion 53b and the second plate portion 53c are formed on the second frame body 54a side, while the second frame body 54a of the cable chamber housing 54 has the first plate portion 53b and the second plate portion. A third plate portion 54c and a fourth plate portion 54d are formed so as to be joined to 53c. Then, as shown in FIG. 11, the first plate portion 53 b of the main bus chamber housing 53 and the third plate portion 54 c of the cable chamber housing 54 are joined, and the second plate portion of the main bus chamber housing 53 is joined. 53c and the fourth plate portion 54d of the cable chamber casing 54 are joined together, and then fastened by a bolt 59 and a nut 60 as a first fastening body, and a bolt 61 and a nut 62 as a second fastening body. Become a body.

Embodiment 3 FIG.
A third embodiment of the present invention will be described with reference to FIG. In FIG. 12, the L-shaped frame 63 is attached to the first plate portion 53 b bent in the orthogonal direction from the first frame body 53 a of the main bus chamber housing 53 with bolts 59 and nuts 60.

In the third embodiment, by attaching the L-shaped frame 63 together with the fastening of the first plate portion 53b and the third plate portion 54c, for example, various components in the main bus chamber housing 53 are L-shaped. It can be attached using an attachment hole (not shown) formed in the frame 63, which is excellent in convenience.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described with reference to FIG. In FIG. 13, the connection between the main bus chamber casing 53 as the first casing and the cable chamber casing 54 as the second casing will be described. 53a is a first frame body of the main bus chamber housing 53, 53b is a first plate portion bent in an orthogonal direction from the first frame body 53a, and 53d is parallel to the first frame body 53a from the first plate portion 53b. A second plate part bent in the orthogonal direction so that the second frame body 54a is a second frame body of the cable chamber housing 54, a third plate part 54c is bent in the orthogonal direction from the second frame body 54a, Reference numeral 54d denotes a fourth plate portion bent in the orthogonal direction so as to be parallel to the second frame body 54a from the second plate portion 54c. That is, the second plate portion 53d and the fourth plate portion 54d are bent in directions opposite to each other. Reference numeral 64 denotes a plate-like frame body joined to the second plate portion 53d and the fourth plate portion 54d. Reference numerals 65 and 66 denote bolts and nuts as first fastening bodies that fasten the first plate portion 53b and the third plate portion 54c, and reference numerals 67 and 68 denote second plates extending further in the orthogonal direction than the positions of the bolt 65 and the nut 66. Bolts and nuts as second fastening bodies for fastening the portion 53d and the plate-like frame body 64, and 69 and 70 are fourth plate portions 54d and plate-like frame bodies that extend further in the orthogonal direction from the positions of the bolt 65 and the nut 66. And bolts and nuts as third fastening bodies for fastening 64.

In the fourth embodiment, the first plate portion 53b bent in the orthogonal direction from the first frame body 53a of the main bus chamber casing 53 and the second frame body 54a of the cable chamber casing 54 are folded in the orthogonal direction. The bent third plate portion 54c is fastened with a bolt 65 and a nut 66 as a first fastening body, and the second plate portion 53d is further bent and extended in the orthogonal direction from the first plate portion 53b. And the plate-like frame body 64 are fastened by bolts 67 and nuts 68 as second fastening bodies, and further bent and extended in a direction opposite to the second plate portion 53d in the orthogonal direction from the third plate portion 54c. Since the fourth plate portion 54d and the plate-like frame body 64 are fastened by the bolt 69 and the nut 70 as the third fastening body, and between the first plate portion 53b and the third plate portion 54c, and The plate-like frame body 64 and the second The strength of the coupling portion with sealing effect is significantly improved between the parts 53d and the fourth plate portion 54d is also improved. The outflow path of the high-temperature gas is straight in the above-described first embodiment, but in this fourth embodiment, the outflow path is bent, that is, deflected at right angles, and is sealed more than the above-described first embodiment. The effect is further exhibited.

As a result, it is possible to prevent the high temperature gas from flowing out of the switchgear as shown by the arrow 26 at the time of the pressure rise caused by the internal short circuit accident, and to prevent the high reliability. A switch gear having a connection structure can be obtained.

As is clear from FIG. 13, the first frame body 53a, the first plate portion 53b, the second plate portion 53d of the main bus chamber housing 53, the second frame body 54a of the cable chamber housing 54, and the third frame body 53a. Both the plate portion 54c and the fourth plate portion 54d are U-shaped, and can be bent in the same manner when forming the casing, so that standardization of parts and work efficiency can be achieved.

By the way, according to the connection structure between the casings according to each embodiment as described above, the sealing effect of the connection portion between the casings is remarkably improved and the strength of the coupling portion is also improved. In this case, the thickness of the side covers 22, 23 provided outside the case fastening portion can be reduced, and the side covers 22, 23 can be omitted in some cases.

Embodiment 5 FIG.
A fifth embodiment of the present invention will be described with reference to FIGS. FIG. 14 is a front view of a main part showing a housing connection part in which the part C of FIG. 6 is enlarged, and FIG. 15 is a cross-sectional view taken along line XV-XV of FIG. In these drawings, for example, 53c is formed on the second plate portion of the main bus chamber housing 53, 54d is the fourth plate portion of the cable chamber housing 54, 63 is an L-shaped frame, and 63a is formed on the L-shaped frame 63. This is a mounting hole for each component. 71 is, for example, a round hole formed in the second plate portion 53c, and 72 is a polygonal hole made of, for example, a square (hereinafter referred to as a square hole) smaller than the round hole 71 formed in the other fourth plate portion 54d. Are arranged on the same axis. In short, it is only necessary to provide the round hole 71 on either side of the joint relationship and provide the square hole 72 on the other side. In the fifth embodiment, the figure is provided with a round hole 71 in the first plate portion 53b and the second plate portion 53c on the side of the main bus chamber housing 53, in contrast to the configuration of the third embodiment described above as an example. The structure which provided the square hole 72 in the 3rd board part 54c and the 4th board part 54d of the chamber housing | casing 54 is shown.

In this way, in the second plate portion 53c and the fourth plate portion 54d that are fastened to each other, the round hole 71 is provided in the second plate portion 53c and the square hole 72 is provided in the fourth plate portion 54d. The two can be easily fastened using a fastening body made of a bolt and a nut as shown in FIG.

In the case shown in FIG. 16, a blind nut 73 is inserted into the quadrangular hole 72 of the fourth plate portion 54d, and a bolt 74 is screwed into the blind nut 73 through the round hole 71 of the second plate portion 53c. The plate portion 53c and the fourth plate portion 54d are fastened. 75 is a washer. Although not shown, the first plate portion 53b and the third plate portion 54c are similarly fastened by the blind nut 73 and the bolt 74. As described above, since the blind nut 73 inserted into the rectangular hole 72 does not turn, simply by screwing the bolt 74 into the blind nut 73, the first plate portion 53b, the third plate portion 54c, And the 2nd board part 53c and the 4th board part 54d can be fastened.

In the case shown in FIG. 17, the screw portion 76a of the bolt 76 is inserted into the rectangular hole 72 of the fourth plate portion 54d and the round hole 71 of the second plate portion 53c, and the rectangular portion 76b of the bolt 76, for example. Are engaged, and a washer 77 is inserted into the threaded portion 76a of the bolt 76, and then a nut 78 is screwed in to fasten the second plate portion 53c and the fourth plate portion 54d. Although not shown, the first plate portion 53b and the third plate portion 54c are similarly fastened by bolts 76 and nuts 78. As described above, the rectangular polygonal portion 76b of the bolt 76 is engaged with the rectangular hole 72, and the bolt 76 does not turn. Therefore, the nut 78 is simply screwed into the threaded portion 76a of the bolt 76. The first plate portion 53b and the third plate portion 54c, and the second plate portion 53c and the fourth plate portion 54d can be fastened easily. In addition, since the bolt 76 does not rotate, the head portion does not have a hexagonal shape, and the space can be saved as a semicircular shape.

Embodiment 6 FIG.
A sixth embodiment of the present invention will be described with reference to FIGS. FIG. 18 is a perspective view showing a main part of an example of mounting inside the casing of the switch gear, and FIGS. 19 and 20 are cross-sectional views showing a main part of the mounting example inside the casing of the switch gear. In these drawings, for example, 53a is a first frame body of the main bus chamber housing 53, 53c is a second plate portion of the main bus chamber housing 53, 54a is a second frame body of the cable chamber housing 54, and 54d is The fourth plate portion of the cable chamber housing 54, 63 is an L-shaped frame, and 63 a is a mounting hole for each component formed in the L-shaped frame 63. 71 is, for example, a round hole formed in the second plate portion 53c, and 72 is a polygonal hole made of, for example, a square (hereinafter referred to as a square hole) smaller than the round hole 71 formed in the other fourth plate portion 54d. Are arranged on the same axis. In short, it is only necessary to provide the round hole 71 on either side of the joint relationship and provide the square hole 72 on the other side. In the fifth embodiment, the figure is provided with a round hole 71 in the first plate portion 53b and the second plate portion 53c on the side of the main bus chamber housing 53, in contrast to the configuration of the third embodiment described above as an example. The structure which provided the square hole 72 in the 3rd board part 54c and the 4th board part 54d of the chamber housing | casing 54 is shown.

79 is a first support frame that is attached to a fixed position in the housing, for example, and a round hole 79b is formed at a position corresponding to the round hole 71 on the support plate 79a to be attached to the second plate portion 53c. Mounting holes 79c and 79d for mounting and supporting each component are formed. Reference numeral 80 denotes a second support frame that is attached to the housing so that the attachment position can be freely changed, and the round hole 80b is provided at a position corresponding to the round hole 71 on the support plate 80a for attachment to the second plate portion 53c. Are formed, and mounting holes 80c and 80d for mounting and supporting each component are formed in the housing.

81 is a blind nut inserted into the square hole 72 of the fourth plate portion 54d for attaching the first support frame 79 to the second plate portion 53c portion, and 82 is a round hole 79b of the support plate 79a of the first support frame 79. A bolt 83 screwed into the blind nut 81 through the round hole 71 of the second plate portion 53c is a washer.

84 is for attaching the second support frame 80 to the second plate portion 53c, so that the screw portion 84a is a square hole 72 of the fourth plate portion 54d, a round hole 71 of the second plate portion 53c, and a support plate of the second support frame 80. A bolt that is inserted into the round hole 80b of 80a, for example, the rectangular polygonal portion 84b is engaged with the square hole 72 of the fourth plate portion 54d, 85 is a nut that is screwed into the screw portion 84a of the bolt 84, and 86 is It is a washer.

FIG. 19 shows a fastening portion when the first support frame 79 is attached to the second plate portion 53c, that is, a P portion of FIG. 18 in section, and a blind nut 81 is inserted into the square hole 72 of the fourth plate portion 54d. Then, a bolt 82 is screwed into the blind nut 81 through the round hole 79b of the support plate 79a of the first support frame 79 and the round hole 71 of the second plate portion 53c, and the support plate 79a of the first support frame 79 is inserted into the first support frame 79. Fastened to the second plate portion 53c and the fourth plate portion 54d. As described above, since the blind nut 81 inserted into the rectangular hole 72 does not rotate, the first support frame 79 can be easily attached to the first plate portion 53b simply by screwing the bolt 82 into the blind nut 81. It can fasten to the 3rd board part 54c.

20 shows a fastening portion when the second support frame 80 is attached to the second plate portion 53c, that is, the Q portion of FIG. 18 in section, and the rectangular hole 72 and the second plate portion of the fourth plate portion 54d. The screw portion 84a of the bolt 84 is inserted into the round hole 71 of the 53c and the round hole 80b of the support plate 80a of the second support frame 80, and a rectangular polygonal portion 84b of the bolt 84 is engaged, for example. After the washer 86 is inserted into the portion 84a, the nut 85 is screwed to fasten the support plate 80a of the second support frame 80 to the second plate portion 53c and the fourth plate portion 54d. As described above, the rectangular polygonal portion 84b of the bolt 84 is engaged with the rectangular hole 72, and the bolt 84 does not turn. Therefore, the nut 85 is simply screwed into the screw portion 84a of the bolt 84. The second support frame 80 can be easily fastened to the first plate portion 53b and the third plate portion 54c. In addition, since the bolt 84 does not rotate, the head does not have a hexagonal shape, and a space can be saved as a semicircular shape.

In addition, once the fastening body is attached, when it is not possible to remove it or when it is difficult to attach it, such a fastening body with blind nuts and bolts is selected, and the fastening body is frequently attached and removed. In this case, a fastening body using a bolt with a polygonal part and a nut may be selected. Of course, the selection is not limited to these, and a combination of the two may be selected.

By the way, in each of the embodiments described above, the case of the main bus chamber casing 53 as the first casing and the cable chamber casing 54 as the second casing has been described, but the circuit breaker casing as the first casing. 52, it can also be applied to the case where the main bus chamber housing 53 is used as the second housing, and the same effect is obtained. In short, the present invention can be applied to a structure for fastening two adjacent casings.

The present invention relates to a switchgear having a plurality of cases in which, for example, a gas insulated switch or the like is installed, and is suitable for realizing a highly reliable switchgear.

Claims (6)

In a switchgear formed by connecting at least a first housing and a second housing, the first frame body of the first housing, the second frame body of the second housing, and orthogonal to the first frame body A first plate portion bent in a direction, a second plate portion bent in an orthogonal direction so as to be parallel to the first frame body from the first plate portion, and an orthogonal direction from the second frame body A third plate part joined to the first plate part bent at the same time, and the third plate part is bent so as to be parallel to the second frame body in the same direction as the second plate part. The 4th board part joined with the 2nd board part, the 1st fastening object which fastens the 1st board part and the 3rd board part, and the 2nd board part and the 4th board part are fastened. A switchgear comprising a second fastening body. Switchgear according to claim 1, wherein it has entered into the L-shaped frame member to the first plate portion.   In a switchgear formed by connecting at least a first housing and a second housing, the first frame body of the first housing, the second frame body of the second housing, and orthogonal to the first frame body A first plate portion bent in a direction, a second plate portion bent in an orthogonal direction so as to be parallel to the first frame body from the first plate portion, and an orthogonal direction from the second frame body A third plate portion joined to the first plate portion that is bent in a direction, and folded in an orthogonal direction so as to be parallel to the second frame body in the opposite direction from the third plate portion to the second plate portion. A bent fourth plate portion, a plate-like frame body joined to the second plate portion and the fourth plate portion, and a first fastening body for fastening the first plate portion and the third plate portion; A second fastening body for fastening the second plate portion and the plate-like frame body, and a fastening of the fourth plate portion and the plate-like frame body. 3 switchgear, characterized in that a fastening member. Wherein either one side of each plate portion is constituted by a round hole, the other side of the switch gear according to any one of claims 1 to 3, characterized in that is constituted by a small polygonal hole than the round hole. The switchgear according to claim 4 , wherein the fastening body is configured by a blind nut having a polygonal portion engaged with the polygonal hole and a bolt screwed to the blind nut. The switchgear according to claim 4 , wherein the fastening body is configured by a bolt having a polygonal portion engaged with the polygonal hole and a nut screwed to the bolt.

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