JP6413370B2 - Distribution board and transformer connection structure and power distribution equipment - Google Patents

Description

  The present invention relates to a connection structure between a distribution board and a transformer installed in a building, a factory, or the like, and a power receiving and distribution facility to which the connection structure is applied.

  For example, when connecting a switchboard and a transformer in a power distribution facility installed outdoors such as a building or factory, in many cases, a bus duct is provided and connected from the top of the panel, thereby aligning the switchboard and the transformer. While performing, the waterproof structure is constructed | assembled (for example, refer patent document 1). Further, in Patent Document 2, a bus duct is interposed between a flange protruding from the transformer and a flange protruding from the switchboard, and a bushing on the transformer side and a busbar on the switchboard side are connected inside the bus duct. A connection structure in which is connected is disclosed.

JP-A-6-153340 Japanese Utility Model Publication No. 62-190319

  However, in the configuration of Patent Document 1, since the bus duct is connected from the upper part of the panel, the bus duct becomes long, and the support structure is required, so that the installation work at the site becomes complicated. On the other hand, in the configuration of Patent Document 2, the bus duct is connected from the side of the panel. However, even in this configuration, a support structure for the bus duct extending in the horizontal direction may be required, and installation work at the site is also necessary. It becomes complicated.

  Therefore, in these connection structures, the installation cost of the power receiving / distributing equipment increases, and the installation space of the entire equipment increases. Moreover, because the bus duct is interposed in the connection between the switchboard and the transformer, the number of connection points between the switchboard and the transformer increases, and rainwater, etc. passes from this connection point to the bushing and busbar connection in the bus duct. There is a concern of intrusion.

  The present invention has been made in consideration of the above-described conventional problems, and it is possible to simplify the installation work at the site, reduce the installation cost, and further connect the switchboard and the transformer, which can reduce the installation space of the equipment. It is an object of the present invention to provide a structure and a power distribution facility to which the connection structure is applied.

  The connection structure of the switchboard and the transformer according to the present invention connects a transformer side flange provided on one side of the transformer and a switchboard side flange provided on one side of the switchboard, and from the transformer side flange. The protruding bushing is passed through the inside of the switchboard side flange and connected to a connection portion of the switchboard within the switchboard casing.

  Further, the power distribution facility according to the present invention is connected to the transformer side flange provided on one side of the transformer and the switchboard side flange provided on one side of the switchboard, and protrudes from the transformer side flange. A front end side of the bushing passes through the inside of the switchboard side flange and is connected to a connection portion of the switchboard within the casing of the switchboard.

  According to such a structure, both flanges are connected without interposing a bus duct between a switchboard and a transformer, and the switchboard and the transformer have a direct connection structure. Therefore, it is possible to connect the switchboard and the transformer simply by connecting the flanges and connecting the bushing and connecting part, and the connection of the bus duct and its supporting structure are not required. Installation costs and parts costs can be reduced, and the power distribution facilities can be made compact, so the installation space can be reduced. In addition, since the bushing and the connecting portion are connected inside the switchboard casing, the connecting portion is housed and protected in the casing, and it is possible to structurally prevent rainwater and the like from entering the connecting portion. .

  When the first waterproof packing is interposed between the connection surfaces of the transformer side flange and the switchboard side flange, it is possible to more reliably prevent rainwater and the like from entering from the connection portion of the flange.

  The switchboard side flange is provided on a panel placed on one side of the switchboard casing, and a panel drainage member is provided on a mounting portion of the panel to the casing. It is possible to more reliably prevent rainwater and the like from entering from the mounting portion.

  In this case, when the second waterproof packing is interposed between the mounting portion of the casing and the panel, the waterproofness at the mounting portion of the panel to the casing can be further enhanced.

  When the connection position of the switchboard and the transformer in the connection direction of the transformer-side flange and the switchboard-side flange is adjusted using the compression amount of the first waterproof packing, the switchboard and the transformer The position adjustment in the front-rear direction can be performed easily and reliably.

  The mounting portion has a long hole extending in the vertical direction, and the connection position between the switchboard and the transformer in the vertical direction is adjusted by the mounting position of the panel in the long hole, It is possible to easily and reliably adjust the position of the transformer in the vertical direction.

  ADVANTAGE OF THE INVENTION According to this invention, the installation work on site can be simplified, installation cost and parts cost can be reduced, and also the installation space of a power receiving / distributing facility can be reduced. In addition, since the bushing and the connecting portion are connected inside the switchboard casing, the connecting portion is housed and protected in the casing, and it is possible to structurally prevent rainwater and the like from entering the connecting portion. .

FIG. 1 is a side view showing a configuration of a power receiving / distributing facility to which a connection structure between a switchboard and a transformer according to an embodiment of the present invention is applied. FIG. 2 is an enlarged side view of a main part of the connection structure between the switchboard and the transformer shown in FIG. FIG. 3 is an exploded side view showing a state before the connection structure shown in FIG. 2 is connected. 4 is a configuration diagram of a panel provided with a flange on the switchboard side, FIG. 4 (A) is a front view of the panel viewed from the inner surface side, and FIG. 4 (B) is FIG. 4 (A). It is a side view of the panel shown in FIG. FIG. 5 is a rear view of the switchboard side flange as viewed from the outer surface side. FIG. 6 is a rear view of the housing. 7 is a cross-sectional view of the housing shown in FIG. 6, FIG. 7A is a cross-sectional view taken along line VIIA-VIIA in FIG. 6, and FIG. 7B is a cross-sectional view of VIIB in FIG. It is sectional drawing which follows the -VIIB line. FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a connection structure between a distribution board and a transformer according to the present invention will be described in detail with reference to the accompanying drawings by giving preferred embodiments in relation to power receiving and distribution equipment to which this connection structure is applied.

  FIG. 1 is a side view showing a configuration of a power receiving / distributing facility 12 to which a switchboard-transformer connection structure 10 according to an embodiment of the present invention is applied. 2 is an enlarged side view of a main part of the connection structure 10 of the switchboard and transformer shown in FIG. 1, and FIG. 3 is an exploded side view showing a state before connection of the connection structure 10 shown in FIG. It is.

  The distribution board / transformer connection structure 10 according to the present embodiment (hereinafter, also simply referred to as “connection structure 10”) is used to connect the distribution board 14 and the transformer 16 constituting the power receiving / distributing facility 12. The switchboard 14 and the transformer 16 are directly connected on the installation surface without interposing a bus duct.

  First, schematic configurations of the switchboard 14 and the transformer 16 will be described.

  As shown in FIG. 1, the transformer 16 includes a rectangular flange 22 provided at the front end of a rectangular cylindrical bushing cover 20 that protrudes from one side of a tank 18, and a bushing 24 that protrudes outward from the flange 22. With. The bushing 24 is connected to the switchboard 14, and the bushing 23 protruding from the other side surface of the tank 18 is connected to a switchboard for high voltage power reception (not shown), for example.

  The switchboard 14 is, for example, a switchboard for receiving a special high voltage, and includes a rectangular frame-shaped flange 28 provided at the tip of a rectangular cylindrical flange cover 26 protruding from one side surface (the back surface in the present embodiment) of the housing 25. And a connection cable (connection portion) 29 provided inside the housing 25. One end of the connection cable 29 is connected to the terminal 27 on the switchboard 14 side, and the other end is connected to a terminal 30 attached to the tip of the bushing 24 on the transformer 16 side. In order to connect the bushing 24 (terminal 30) and the connection cable 29, a space S for securing the bushing 24 and the connection cable 29 and connecting work is secured inside the housing 25.

  As shown in FIGS. 2 and 3, the switchboard 14 and the transformer 16 are connected to each other with the flange 22 and the flange 28 facing each other, and the bushing 24 is passed through the flange 28 and the flange cover 26. Are connected to each other by the connection structure 10 that connects the bushing 24 and the connection cable 29.

  Then, next, the connection structure 10 between the switchboard 14 and the transformer 16, and the components of the switchboard 14 and the transformer 16 which construct | assemble this connection structure 10 are demonstrated concretely.

  FIG. 4 is a configuration diagram of the panel 34 provided with the flange 28 on the switchboard 14 side. FIG. 4A is a front view of the panel 34 viewed from the inner surface side, and FIG. It is a side view of the panel 34 shown to 4 (A). FIG. 5 is a rear view of the flange 28 on the switchboard 14 side as seen from the outer surface side.

  As shown in FIGS. 2 and 3, in this embodiment, the flange 28 on the switchboard 14 side is provided on a panel 34 that closes a rectangular opening 32 formed on one side surface of the housing 25. The opening 32 is a hole for introducing the bushing 20 on the transformer 16 side into the housing 25.

  As shown in FIG. 3, FIG. 4 (A) and FIG. 4 (B), the panel 34 is opened on one side by a rectangular top plate 34a and four side plates 34b protruding from the four sides of the top plate 34a. The flange 28 projects from a top plate 34a which is an outer surface panel of the housing 25. The top plate 34a has an opening 34c communicating with a passage 26a defined in the flange cover 26 and a plurality of long holes 34d through which screws (not shown) are inserted when the panel 34 is attached to the housing 25. And are provided. A waterproof packing (second waterproof packing) 43 made of a rubber material or the like is attached to the inner surface of the top plate 34a along the edge of the opening 34c.

  As shown in FIG. 5, a plurality of through holes 28 a are formed along the outer edge of the flange 28 on the switchboard 14 side. Further, the flange 22 on the transformer 16 side connected to the flange 28 also has the same outer shape as the flange 28, and a plurality of through holes 22a through which the bolts 36 are inserted together with the respective through holes 28a on the flange 28 side. It is formed along the edge (see FIG. 3).

  FIG. 6 is a rear view of the housing 25, as viewed from the outer surface side with the panel 34 removed.

  As shown in FIG. 6, a rectangular opening 32 for passing the bushing 24 on the transformer 16 side, a bushing 24, and a connection cable 29 are provided on the back surface of the housing 25 to which the panel 34 provided with the flange 28 is attached. A rectangular opening 40 that is used during the connection work is formed side by side.

  A water draining member 42 having a substantially U-shaped cross section is provided at the outer edge of the opening 32 so as to surround the opening 32 (see FIGS. 6 to 8). The draining member 42 is a bowl-shaped member for preventing water from entering the opening 32 from the outside, and a waterproof packing 43 provided on the panel 34 side abuts on the end surface. A plurality of mounting cylinders 44 project from the upper and lower edges of the opening 32 in the left-right direction (see FIGS. 6 and 8). The mounting cylinder 44 is a cylinder having a predetermined height dimension (projection amount), and a screw hole 44a is formed at the center of the axis. The attachment cylinder 44 constitutes an attachment portion of the panel 34 to the housing 25 together with the elongated hole 34d of the panel 34. Note that reference numeral 46 in FIG. 7 and FIG.

  As shown in FIGS. 3 and 8, the panel 34 is covered with the back surface of the housing 25 so as to cover the opening 32, the inner surface of the top plate 34 a is applied to the mounting cylinder 44, and screws are passed through the long holes 34 d of the panel 34. Screwed into the screw hole 44a. Accordingly, the panel 34 can be attached to the back surface of the housing 25 to close the opening 32, and at the same time, the flange 28 can be installed on the back surface of the housing 25. At this time, since the panel 34 is attached to the housing 25 through the height dimension of the attachment cylinder 44, the draining member 42 does not interfere with the attachment of the panel 34. Here, the draining member 42 and the panel 34 come into contact with each other through the waterproof packing 43, and the waterproof packing 43 closes the gap between the draining member 42 and the panel 34. A waterproof structure is constructed to prevent intrusion. In addition, as shown in part A in FIG. 8, the dimensional distance between the end face of the panel 34 and the rear face of the housing 25 is made as short as possible, so that the occurrence of rainwater entering the draining member 43 side is minimized. Limit. Note that reference numeral 49 in FIG. 8 is a roof member for more reliably preventing rainwater or the like from entering the opening 32.

  Note that the opening 40 also has a rectangular top plate 48a and four side plates 48b protruding from the four sides of the top plate 48a. The opening 32 is closed in substantially the same manner (see FIG. 8). That is, also in the case of the opening 40, a draining member 42 that contacts the waterproof packing 43 attached to the lower panel 34 side is provided at the outer edge portion thereof, and a plurality of mounting cylinders 44 are provided at the upper, lower, left and right edge portions thereof. Thus, the lower panel 48 is attached with a waterproof structure (see FIGS. 6 to 8). Note that reference numeral 50 in FIG. 8 is a bottom plate of the housing 25.

  Next, one work procedure for constructing the connection structure 10 according to this embodiment for connecting the switchboard 14 and the transformer 16 as described above will be described.

  First, as shown in FIGS. 1 and 3, the transformer 16 which is a heavy object is installed at a predetermined position on the installation surface, and the flange 22 on the transformer 16 side and the flange 28 on the switchboard 14 side are then arranged facing each other. However, the switchboard 14 is installed while adjusting the position. At this time, the panel 34 is temporarily fixed to the housing 25, and the bushing 24 on the transformer 16 side is inserted into the flange 28 and the flange cover 26 on the switchboard 14 side. The panel 34 may not be temporarily fixed to the housing 25.

  Next, as shown in FIGS. 2 and 3, the through holes 22 a and 28 a of the flanges 22 and 28 are aligned with each other, and bolts 36 are passed through the holes 22 a and 28 a to be fastened. At this time, in the connection structure 10, a rectangular frame-shaped waterproof packing (first waterproof packing) 54 made of a rubber material or the like is interposed between the connection surfaces of the flanges 22 and 28. A plurality of through holes 54a are formed in the waterproof packing 54, and the waterproof packing 54 is compressed and sandwiched between the flanges 22 and 28 by inserting the bolts 36 in the order of the through holes 22a, 54a and 28a. , 28 connecting portions (joining portions) are constructed.

  Here, in the connection structure 10, the adjustment of the connection position in the facing direction (front-rear direction) between the switchboard 14 and the transformer 16 is to adjust the compression amount (deformation amount) of the waterproof packing 54 between the flanges 22 and 28. To do. Further, the adjustment of the connection position in the vertical direction is performed by adjusting the attachment position of the housing 25 to the attachment cylinder 44 using the long hole 34d of the panel 34 temporarily fixed to the housing 25. Furthermore, the adjustment of the connection position in the left-right direction is performed when the switchboard 14 is installed. Thereby, while aligning between the flanges 22 and 28 easily and reliably, the connection between the switchboard 14 and the transformer 16 can be adjusted, and both can be reliably connected.

  Then, as shown in FIG. 3, the bushing 24 protruding from the flange 22 on the transformer 16 side, passing through the flange 28 and the flange cover 26 of the switchboard 14 and protruding into the housing 25 of the switchboard 14 is connected to the connection cable 29. By connecting, the connection work of the switchboard 14 and the transformer 16 is completed. Thereby, both are directly connected via the flanges 22 and 28 in a state where the bus duct between the switchboard 14 and the transformer 16 is omitted.

  As described above, in the connection structure 10 according to the present embodiment, the flange (transformer side flange) 22 provided on one side of the transformer 16 and the flange (distribution side flange) provided on one side of the switchboard 14. 28, the front end side of the bushing 24 protruding from the flange 22 is passed through the flange 28, and is connected to a connection cable 29 that is a connection portion of the switchboard 14 in the casing 25 of the switchboard 14.

  As described above, in the connection structure 10, the flanges 22 and 28 are connected to each other without interposing a bus duct between the distribution board 14 and the transformer 16, and the distribution board 14 and the transformer 16 are directly connected. Therefore, it is possible to connect the switchboard 14 and the transformer 16 simply by connecting the flanges 22 and 28, and connecting the bushing 24 and the connection cable 29, and the connection of the bus duct and its supporting structure are not required. This simplifies the installation work at the plant and can reduce installation costs and component costs. Furthermore, since the power receiving / distributing facility 12 can be made compact, the installation space can be reduced. In addition, since the bushing 24 and the connection cable 29 are connected inside the casing 25 of the switchboard 14, the connecting portion is accommodated and protected in the casing 25, and rainwater or the like enters the connecting portion. This can be prevented structurally.

  In the connection structure 10, a waterproof packing 54 is interposed between the connection surfaces of the flanges 22 and 28. For this reason, it can prevent more reliably that rainwater etc. permeate from the connection part of the flanges 22 and 28. FIG.

  In the connection structure 10, a flange 28 on the switchboard 14 side is further provided on a panel 34 that covers a part of the back surface (opening 32) of the housing 25, and an attachment portion of the panel 34 of the housing 25. Is provided with a draining member 42. For this reason, it can prevent more reliably that rainwater etc. permeate from the attachment part to the housing | casing 25 of the panel 34. FIG. Furthermore, since the waterproof packing 43 is interposed between the mounting portion of the housing 25 and the panel 34, the waterproof property can be further enhanced.

  It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Connection structure of distribution board and transformer 12 Power distribution / distribution equipment 14 Distribution board 16 Transformer 20 Bushing cover 22, 28 Flange 22a, 28a, 54a Through-hole 24, 27 Bushing 25 Case 26 Flange cover 27, 30 Terminal 29 Connection cable 32 , 34c, 40 Open 34 Panel 34d Long hole 36 Bolt 42 Draining member 43, 54 Waterproof packing 44 Mounting cylinder 52 Nut

Claims (4)

Connect the transformer side flange provided on one side of the transformer and the switchboard side flange provided on one side of the switchboard,
In the configuration in which the front end side of the bushing protruding from the transformer side flange is passed through the switchboard side flange and connected to the connection part of the switchboard in the casing of the switchboard,
An opening is formed on one side surface of the casing of the switchboard, and a panel that closes the opening is screwed and fixed using a long hole extending in the vertical direction,
The switchboard side flange is provided before Kipa panel,
Wherein the one side of the housing, the opening of the peripheral flashing member is provided which protrudes from the portion Rutotomoni, water cutting member is covered by said panel,
The bushing is connected to a connection part of the switchboard via the switchboard side flange provided on the panel and the opening formed in one side of the casing. . In the connection structure of the switchboard and transformer according to claim 1,
A connection structure between a switchboard and a transformer, wherein a first waterproof packing is interposed between connection surfaces of the transformer-side flange and the switchboard-side flange. In the connection structure of the switchboard and transformer according to claim 1 or 2,
A connection structure between a switchboard and a transformer, wherein a second waterproof packing is interposed between the casing and the panel. The transformer side flange provided on one side of the transformer and the switchboard side flange provided on one side of the switchboard are connected,
In the configuration where the front end side of the bushing protruding from the transformer side flange passes through the switchboard side flange and is connected to the connection part of the switchboard in the casing of the switchboard,
An opening is formed on one side surface of the casing of the switchboard, and a panel that closes the opening is screwed and fixed using a long hole extending in the vertical direction,
The switchboard side flange is provided before Kipa panel,
Wherein the one side of the housing, the opening of the peripheral flashing member is provided which protrudes from the portion Rutotomoni, water cutting member is covered by said panel,
The said bushing is connected to the connection part of the said switchboard through the said switchboard side flange provided in the said panel and the said opening formed in one side of the said housing | casing, The power distribution equipment characterized by the above-mentioned .

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