JP5686320B2 - Ground-mounted transformer device - Google Patents

Description

  The present invention relates to a ground-mounted transformer device installed on a sidewalk along a road.

  In recent years, in urban areas, with the undergrounding of distribution lines, ground-mounted transformer devices are installed on sidewalks along roads. This type of transformer device is disclosed in Patent Document 1, for example. The ground-mounted transformer device includes an outer box having a pair of side plates on the long side facing in the width direction and a pair of side plates on the short side in the longitudinal direction, and a pair of long sides facing in the width direction. Having a structure in which a transformer body is accommodated in a rectangular parallelepiped transformer tank having a side wall and a pair of short side walls opposed to each other in the longitudinal direction. A transformer housed in the outer box in a state of being opposed to the pair of long side side plates, and a protection device housed in the outer box together with the transformer. Protection equipment includes primary switchgear (LBS) provided between the high-voltage cable drawn from the underground distribution line and the primary bushing terminal, and inserted between the primary bushing terminal and the primary terminal of the transformer body. And a circuit breaker inserted between a secondary bushing terminal of the transformer and a plurality of low-voltage cables for power distribution drawn to the outside.

  In order to cool the insulating oil heated by the heat generated from the transformer main body in the transformer tank and reduce the temperature rise of the transformer main body, the oil passage inside the long side wall of the transformer tank A heatsink having is attached. In order to ventilate the outer box, at least one ventilation opening with a gallery attached is provided at the lower part of the side plate on one long side of the outer box facing the radiator. If necessary, a ventilation opening with a gallery attached to the upper part of the side plate of the outer box is provided.

  In order to efficiently cool the transformer, in the conventional ground-mounted transformer device, as shown in Patent Document 1, the heat radiation attached to the side wall on one long side of the transformer tank A space is provided between the radiator and the side plate on one long side of the outer box facing the radiator, and a plurality of fans for blowing air toward the radiator are arranged in this space. In addition, a low-voltage side protection device connected to the secondary side of the transformer is attached to the side wall on the other long side of the transformer tank, and a protective plate is attached to the side plate on the other long side of the outer box. There is an inspection door that is opened during maintenance inspection of the equipment. In this specification, the outer surface of the side plate on one long side of the outer box facing the radiator attached to the transformer tank is the rear surface of the device, and the surface of the outer box on which the inspection door is provided is the front surface of the device. And

  This type of transformer device is installed on the side of the sidewalk with the longitudinal direction of the outer box oriented in a direction perpendicular to the width direction of the sidewalk and the front with the inspection door facing the pedestrian side. Is done.

  As described above, in the conventional ground-mounted transformer device, since the blower is arranged inside the ventilation port provided in the outer box, when performing maintenance or replacement of the blower, the blower is connected through the ventilation port. It was necessary to perform the detachment work.

JP 2006-353014 A

  In a conventional ground-mounted transformer device, a space for placing a blower is provided between the radiator attached to the transformer tank and the side plate of the outer box, so the outer box becomes larger and the device is compact. There was a problem that the property was impaired.

  Furthermore, in the conventional ground-mounted transformer device, when performing maintenance on the blower, it was necessary to attach and detach the blower through the ventilation opening, so the transformer device was walked in front of the sidewalk near the roadway. When it is installed toward the person side, it is necessary to perform the work of attaching / detaching the blower from the roadway side, and there is a problem that the work is dangerous.

  Also, when installing the transformer device on the sidewalk building side, with its front facing the pedestrian side, it is necessary to install the device close to the pedestrian side for the space to attach and detach the blower, There is a problem in that it is inevitable that the space for pedestrians to pass through and the apparatus cannot be installed when the sidewalk is narrow.

  The object of the present invention is to allow the fan to be arranged without causing an increase in the size of the outer box, and to allow the fan to be attached and detached from the end face side in the longitudinal direction of the outer box. The object is to provide a ground-mounted transformer device that solves various problems.

  The present invention relates to a ground-mounted transformer device installed beside a sidewalk or the like. The ground-mounted transformer device to which the present invention is directed is an outer case having a pair of side plates on the long side opposite to the width direction and a pair of side plates on the short side opposite to the longitudinal direction, and relative to the width direction. A pair of long sides having a structure in which a transformer body is housed in a rectangular parallelepiped transformer tank having a pair of long side walls and a pair of short side walls facing in the longitudinal direction. And a transformer housed in the outer box with the side walls facing the pair of side plates on the long side of the outer box. A radiator is attached to the side wall on one long side of the transformer tank, and at least one ventilation port with a gallery attached to the lower part of the side plate on one long side of the outer box facing the radiator. ing.

  In the present invention, in order to achieve the above object, a fan housing space extending in the longitudinal direction of the outer box is formed below the radiator, and a fan for blowing air to the radiator is accommodated in the fan housing space. Yes. At the lower part of the side plate on one short side of the outer box, a working opening that opens one end in the longitudinal direction of the blower housing space to the outside, and a removable cover plate that closes the working opening, are provided. It is configured so that the insertion of the blower into the blower housing space and the extraction of the blower from the blower housing space can be performed through the work opening.

  As described above, when a fan housing space extending in the longitudinal direction of the outer box is provided below the radiator, and the fan is arranged in the fan housing space, the fan is disposed between the radiator and the side plate of the outer box. Since it is not necessary to provide a space for arrangement, it is possible to prevent the outer box from becoming large.

  Also, as described above, a fan housing space extending in the longitudinal direction of the outer box is provided below the radiator, and one end in the longitudinal direction of the fan housing space is externally provided at the lower part of the side plate on one short side of the outer box. When the working opening to be opened is provided, the insertion of the blower into the blower housing space and the drawing of the blower from the blower housing space are performed through the working opening provided at the end in the longitudinal direction of the outer box. Therefore, if the transformer device is installed near the roadway on the sidewalk, it will be forced to perform dangerous work, or if the transformer device is installed near the sidewalk building, It is possible to prevent the passing space from becoming narrow and the device from being unable to be installed.

  In a preferred aspect of the present invention, the blower includes a substrate inserted into the blower accommodation space through the working opening with the tip directed toward the other end in the longitudinal direction of the blower accommodation space, and the blower accommodated together with the substrate attached to the substrate. And a structure including at least one blower unit configured to be accommodated in a space. In this case, a guide member that slidably guides the substrate of the blower inserted into the blower housing space through the working opening along the longitudinal direction of the outer box is disposed in the lower part of the blower housing space and is located with respect to the outer box. Fixed.

  When configured as described above, the fan is inserted into the fan housing space and the fan is drawn out from the fan housing space by sliding the fan along the longitudinal direction of the outer box regardless of the number of the air blowing units. Therefore, it is possible to easily attach and detach the blower.

  In another preferred aspect of the present invention, a positioning member that receives the tip of the substrate of the blower that has been guided and slid by the guide member and positions the blower at a specified position is provided on the other end side in the longitudinal direction of the blower housing space. In addition, when the tip of the substrate is received by the positioning member, there is provided a fixture for fixing the tip of the substrate of the blower positioned at the specified position to the outer box by pressing the portion near the tip of the substrate downward. It is done.

  If the positioning member and the fixture are provided as described above, the blower can be automatically positioned and fixed so as not to move from the specified position when the blower is inserted into the blower housing space. Since the fixing of the blower can be easily released when it is pulled out from the blower housing space, it is possible to easily attach and detach the blower.

  In another preferable aspect of the present invention, the positioning member includes a stopper portion that receives the tip of the substrate of the blower when the blower is disposed at the specified position, and an upper end of the stopper portion when the blower is disposed at the defined position. It has an overhanging portion that is in an overhanging state on the substrate side. In addition, the fixing tool is held by the protruding portion of the positioning member so as to be displaceable in the vertical direction, and is pressed with the lower end in contact with the upper surface of the portion near the tip of the substrate of the blower arranged at the specified position. A member and a spring for urging the pressing member downward. In addition, an inclined plate portion inclined downward is provided at the tip of the substrate of the blower, and the lower end of the pressing member is rounded, inserted into the blower housing space, guided by the guide member and slid by the guide member. When the inclined plate portion at the front end of the substrate pushes the lower end of the pressing member from the side, the lower end of the pressing member is pushed up by the inclined plate portion at the front end of the substrate and rides on the portion near the front end of the substrate. ing.

  If comprised as mentioned above, since a positioning member and a fixing tool can be integrated, simplification of a structure can be achieved.

  As the blower unit, it is formed in an elongated shape so that it can be housed in the blower housing space, a discharge port is provided at the top, and a rectangular parallelepiped case in which an air intake port is provided on at least one of the side surface and the lower surface, It is preferable to use one provided with a cross flow fan housed in a case.

  When the above blower unit is used, the cooling air can be blown almost uniformly along the longitudinal direction of the radiator, so that the entire radiator is uniformly cooled to efficiently cool the transformer. be able to.

  Moreover, it is preferable to attach the baffle plate which guides the cooling air discharged through the discharge port to the side wall side of the transformer tank at the upper part of the case of the blower unit.

  If the air guide plate as described above is provided, the cooling air sent from the blower unit can flow between the heat dissipating fins of the radiator and flow smoothly upward as rectification. Heat exchange can be promoted to efficiently cool the transformer.

  In a preferred aspect of the present invention, the cover plate for closing the work opening is made of a gallery, and the work opening constitutes another ventilation port, and one short side of the outer box provided with the work opening. Another radiator is attached to the side wall on one short side of the transformer tank facing the side plate on the side.

  If comprised as mentioned above, it can be made to perform cooling of a transformer apparatus efficiently using an opening part for work as a ventilation opening.

  According to the present invention, a fan accommodating space extending in the longitudinal direction of the outer box is provided below the radiator, and the fan is disposed between the radiator and the side plate of the outer box by arranging the fan in the fan accommodating space. Since there is no need to provide space for placement, the outer box can be prevented from becoming large, and the cooling performance of the transformer can be improved without compromising the compactness of the ground-mounted transformer device. be able to.

  According to the present invention, the blower housing space extending in the longitudinal direction of the outer box is provided below the radiator, and one end in the longitudinal direction of the blower housing space is externally provided at the lower part of the side plate on one short side of the outer box. An opening for working is provided to open the fan, and the insertion of the fan into the fan housing space and the drawing of the fan from the fan housing space are performed through the work opening provided at the end in the longitudinal direction of the outer box. Therefore, if the transformer device is installed near the roadway on the sidewalk, it will be forced to carry out dangerous work, or if the transformer device is installed near the sidewalk building, walk It is possible to prevent a space for a person from passing through or a device from being installed.

  In the present invention, the blower is constituted by a substrate inserted into the blower housing space and a blower unit that is attached to the substrate and can be housed in the blower housing space together with the substrate, and the blower substrate is arranged along the longitudinal direction of the outer box. When the guide member that is slidably guided is provided, regardless of the number of the blower units, the blower is inserted into the blower housing space by sliding the blower along the longitudinal direction of the outer box, Since the blower can be pulled out from the blower housing space, the blower can be easily attached and detached.

  In this invention, when the positioning member which positions the board | substrate of an air blower, and the fixing tool which fixes this board | substrate is provided in the edge part of an air blower accommodation space, when an air blower is inserted in an air blower accommodation space, an air blower is automatically set. Positioning and fixing can be performed, and when the blower is pulled out from the blower housing space, the blower can be easily fixed. Therefore, the fan can be easily attached and detached.

It is the top view which removed the ceiling board of the outer box of the ground installation type transformer apparatus concerning one Embodiment of this invention, and showed the structure of the inside. It is the side view which removed the side plate of one short side provided in the end of the longitudinal direction of the outer case of the ground installation type transformer apparatus concerning one Embodiment of this invention, and showed the inside. It is the rear view which showed the state which removed the gallery of the ventilation opening provided in the lower part of the back surface of the ground installation type transformer apparatus concerning one Embodiment of this invention. It is the perspective view of the principal part which showed the state which removed the cover plate of the opening part for operation | work provided in the lower part of the side plate of one short side of an outer case in one Embodiment of this invention. It is the perspective view of the principal part which showed the state which removed the frame board attached to the opening part for work provided in the lower part of the side board of one short side of an outer case in one Embodiment of this invention. It is the expansion perspective view which looked at the principal part inside from the opening part for work provided in the lower part of the side plate by the side of one short side of an outer box in one embodiment of the present invention. It is the perspective view of the principal part which showed the state which has inserted the air blower in the air blower accommodation space in an outer case in one Embodiment of this invention. FIG. 4 is an enlarged side view showing a structure near a blower by removing a side plate on one short side of an outer box and partially cutting a transformer tank in an embodiment of the present invention. It is the disassembled perspective view which showed the air blower used by one Embodiment of this invention, and the guide member which guides this air blower. It is the enlarged view of the principal part which showed the structural example of the positioning fixing device which positions and fixes the front-end | tip of the board | substrate of an air blower in one Embodiment of this invention. It is the enlarged view of the principal part which showed the other structural example of the positioning fixing apparatus which positions and fixes the front-end | tip of the board | substrate of an air blower in one Embodiment of this invention. It is the disassembled perspective view which showed the structural example of the ventilation unit used by embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 8, reference numeral 1 denotes an outer box formed so as to have a substantially rectangular parallelepiped shape as a whole. The outer box 1 includes a base 100 made of a steel frame, a rectangular transformer support plate 101 (see FIG. 8) supported by the base 100, and a pair of long sides facing the width direction of the base 100. Side plates 102 and 103, a pair of side plates 104 and 105 on the short side facing the longitudinal direction of the base 100, and a rectangular ceiling plate 106 that closes the upper end of the space surrounded by the side plates 102 to 105. Yes. In this specification, the longitudinal direction of the base 100 and the width direction perpendicular to the longitudinal direction are defined as the longitudinal direction and the width direction of the outer casing and the device, respectively. Further, the outer surface of one long side side plate 102 is used as the back surface of the outer box and the entire apparatus, and the outer surface of the other long side plate 103 is used as the front surface of the outer box and the entire apparatus.

  Two rectangular back side lower ventilation ports 111 arranged in the longitudinal direction of the outer box 1 at the lower end of the side plate 102 on one long side of the outer box 1 and aligned in the longitudinal direction of the outer box 1 111 (see FIG. 3) is provided, and gallery 112 and 112 are detachably attached to these ventilation openings, respectively. Further, on the upper part of the side plate 102 on the long side, two rear side upper ventilation ports to which the gallery 113, 113 are attached are provided above the ventilation ports 111, 111. On the upper side of one side plate 104 on one short side provided on one end side, a side ventilation port to which a gallery 115 is attached is provided.

  In addition, a rectangular work opening 117 is provided at the lower portion of the side plate 104 on one short side of the outer box 1 so as to be positioned at a corner near the back of the outer box. The work opening 117 is closed by a detachable lid plate 118 made of a gallery, and this work opening also functions as a ventilation opening at all times. In the example shown in the figure, a frame body 119 that is disposed in a state of being fitted into the work opening 117 and is interposed between the cover plate 118 and the peripheral portion of the work opening 117 is provided. The cover plate 118 is attached to the work opening 117 with a screw 120 that passes through the frame body 119 and is screwed into the periphery of the work opening 117.

  The side plate 103 on the front surface side of the outer box 1 and the side plate 105 on the other end side in the longitudinal direction have portions constituting inspection doors 103a (see FIG. 2) and 105a (see FIG. 3). By opening the door, the front side of the outer box and the other end side in the longitudinal direction can be opened.

  A transformer 2 having a known structure in which a transformer main body (not shown) is housed together with insulating oil in a transformer tank 3 is housed in the outer box 1. The transformer tank 3 includes a pair of long-side side walls 301 and 302 facing in the width direction, a pair of short-side side walls 303 and 304 facing in the longitudinal direction, and a space surrounded by these side walls. It is a rectangular parallelepiped tank provided with the bottom wall 305 (refer FIG. 8) and the ceiling wall 306 (refer FIG. 1, FIG. 2) which closes a lower end and an upper end, respectively. The transformer 2 is housed in the outer box 1 with the pair of long side walls 301 and 302 of the transformer tank 3 facing the pair of long side side plates 102 and 103 of the outer box 1, respectively. The bolt 310 (see FIG. 8) is fixed to the transformer support plate 101.

  In order to cool the insulating oil in the transformer tank 3 heated by the heat generated from the transformer body, the first long side wall 301 on the long side of the transformer tank 3 is made of a corrugated steel plate. A radiator 4 is attached, and a second radiator 5 made of a steel plate that is also formed into a corrugated shape is attached to a side wall 303 on one short side. The first radiator 4 is attached to the transformer tank 3 by welding its peripheral edge to the peripheral edge of a rectangular opening 301a (see FIG. 8) provided on the side wall 301 of the transformer tank. Yes. Similarly, the 2nd heat radiator 5 is attached to the transformer tank 3 by welding the peripheral part to the peripheral part of the rectangular opening provided in the side wall 303 of the transformer tank. The first heat radiator 4 and the second heat radiator 5 have a number of hollow heat radiation fins f, f,... That are arranged at intervals in the horizontal direction, and insulating oil is placed inside each heat radiation fin f. A circulating oilway is formed. The insulating oil in the transformer tank 3 is cooled by exchanging heat with the outside air in the process of flowing through the oil passages formed inside the radiator fins of the radiators 4 and 5.

  In order to give the first heat radiator 4 attached to the side wall 301 having a large area of the transformer tank 3 a larger heat radiation effect, the heat radiation fin f of the first heat radiator 4 is the heat radiation of the second heat radiator 5. The protrusion length of the first radiator 4 from the transformer tank is larger than the protrusion length of the second radiator 5 from the transformer tank. Yes. Therefore, the distance between the side plate 102 of the outer box 1 and the side wall 301 of the transformer tank is set to be larger than the distance between the side plate 104 of the outer box 1 and the side wall 303 of the transformer tank.

  The side wall 304 on the short side on the other end side in the longitudinal direction of the transformer tank 3 is provided between the primary side (high voltage side) terminal of the transformer 2 and the high voltage cable (distribution line) drawn from the underground. The primary side switchgear 7 (see FIG. 1), which is a protective device to be installed, is attached, and the other long side wall 302 of the transformer tank 3 is provided between the secondary side of the transformer and the low voltage distribution cable. A secondary protection device 8 including a distribution breaker (breaker) is attached. The outer box 1 is formed in a size that can accommodate these transformers together with the transformer 1.

  In this embodiment, in order to increase the cooling effect of the transformer, a blower that blows air to the main radiator 4 that has at least a large heat dissipation effect is provided in the outer box 1. In order to be able to provide a blower without incurring an increase in size of the outer box 1, in this embodiment, a blower housing space 10 is formed below the first radiator 4 that performs cooling by the blower. A blower 11 is disposed in the blower housing space 10. The blower housing space 10 is provided so as to extend below the radiator 4 along the longitudinal direction of the transformer tank 3 and the outer box 1, and the cover plate 118 that closes the work opening 117 is removed. At this time, one end in the longitudinal direction is opened to the outside through the working opening 117.

  In the present embodiment, the insertion of the blower 11 into the blower housing space 10 and the withdrawal of the blower 11 from the blower housing space 10 can be performed through the work opening 117 from which the cover plate 118 is removed. ing.

  In order to facilitate the insertion of the blower 11 into the blower housing space 10 and the extraction of the blower 11 from the blower housing space 10, it is inserted into the blower housing space 10 through the working opening 117. A guide member 12 that slidably guides the substrate of the blower 11 along the longitudinal direction of the outer box 1 is disposed below the blower housing space 10 and fixed to the outer box 1.

  As shown in FIG. 9, the guide member 12 used in this embodiment includes a strip-like bottom plate portion 12 a extending in the longitudinal direction of the blower housing space 10 (longitudinal direction of the transformer tank 3), and the bottom plate. Shallow U-shaped crossing integrally having a pair of upright portions (guide rail portions) 12b and 12b that stand upright at right angles from both ends in the width direction of the portion 12a and extend in parallel with each other along the longitudinal direction of the blower housing space 10 It consists of a plate having a surface shape.

  In order to take air into the blower 11 also from below the outer box, the bottom plate portion 12a of the guide member 12 is formed with three rectangular vent holes 12c arranged at intervals in the longitudinal direction. The guide member 12 is placed on the upper surface of a support member 120 (see FIG. 8) fixed to a steel material constituting the base 100 of the outer box 1 by welding, bolting, or the like, and is fixed to the support member 120 by bolts 13. . Although not shown, the support member 120 is provided with a vent hole that matches the vent hole 12c of the guide member 12, and air is introduced from below into the vent hole 12c of the guide member 12 through the vent hole of the support member 120. It is like that.

  As shown in FIG. 9, the blower 11 passes through the work opening 117 in a state where the tip is directed to the other end side in the longitudinal direction of the blower housing space 10 (the other end side in the longitudinal direction of the outer box 1). The board | substrate 15 inserted in the air blower accommodation space 10 and the at least 1 air blow unit 16 attached to the board | substrate 15 and comprised so that it can accommodate in the air blower accommodation space 10 with this board | substrate are provided. In the illustrated example, two air blowing units 16 and 16 are provided, and these air blowing units are arranged in a state of being arranged in the longitudinal direction of the substrate 15 and fixed to the substrate 15.

  The substrate 15 integrally has a strip-like substrate main portion 15a extending in the longitudinal direction of the blower housing space 10 and side plate portions 15b and 15b bent downward at right angles from both ends in the width direction of the substrate main portion 15a. And the width dimension is set so that it can be inserted between the standing parts (guide rail parts) 12b, 12b of the guide member 12. Two rectangular vent holes 15c and 15c arranged in the longitudinal direction of the substrate main portion 15a are punched in the substrate main portion 15a. An inclined plate portion 15d extending obliquely downward is projected from the front end portion of the substrate 15, and a folded portion 15e having a U-shaped cross section is formed at the rear end portion of the substrate 15. The folded portion 15e is used as a handle when the substrate 15 is handled.

  As shown in FIG. 12, the blower unit 16 includes a fan case 21 formed so as to have a substantially rectangular parallelepiped shape as a whole, a cross flow fan 22 accommodated in the fan case 21, and a cross flow fan 22. And a motor 23 for driving the motor. The illustrated fan case 21 is formed so as to have a substantially rectangular parallelepiped shape, and has a discharge port 21a formed on the upper surface thereof, and air intake ports 21b formed on the lower and lower surfaces of both side surfaces. The cross flow fan 22 is housed in the fan case 21 with its axis line oriented in the longitudinal direction of the fan case 21, and both ends of the rotating shaft are supported by both longitudinal ends of the fan case 21 via bearings. Yes. The motor 23 is fixed to one end in the longitudinal direction of the fan case 21, and its output shaft is connected to the rotation shaft of the cross flow fan 22.

  In addition, a rectangular cover plate portion 24a arranged in a state of being placed on the upper surface of the fan case and an upper portion of the fan case 21 of the blower unit 16 are bent downward from one end in the longitudinal direction of the cover plate portion 24a. A cover plate 24 that is integrally provided with a side plate portion 24b disposed on the side of the cover 23 is attached. The cover plate 24 is provided with a rectangular window portion 24c that is aligned with the discharge port 21a of the fan case, so that the air sent out by the cross flow fan 22 is discharged from the discharge port 21a on the upper surface of the fan case 21. And is discharged upward through the window 24c of the cover plate 24. The cover plate portion 24a of the cover plate 24 has a projecting portion 24a1 projecting toward the radiator 4 side. This overhanging portion 24a1 is in a state of overhanging an upper portion of a gap g formed between the side surface of the fan case 21 and the lower portion of the side plate 301 of the transformer tank with the blower 1 being inserted into the blower housing space 10. The overhanging portion 24a1 prevents the air discharged from the discharge port of the blower fan 26 from flowing (downward) to the air intake port side.

  An air guide plate 26 that guides the cooling air discharged from the outlet 21 a of the fan case 21 to the side of the side wall 301 to which the radiator 4 of the transformer tank 3 is attached is provided above the fan case 21 of the blower unit 16. It is attached. The air guide plate 26 is located on the end of the cover plate 24 on the opposite side of the overhanging portion 24a1 of the cover plate 24a, and on the side of the band plate opposite to the window 24c. The side plate portion 26b that is bent (downward) from the one side in the width direction to the side surface side of the fan case 21, and the other side in the width direction of the band plate portion 24a that is located on the window portion 24c side of the cover plate The cooling plate protrudes from the discharge port 21a of the fan case 21 so as to be guided to the side wall 301 side of the transformer tank along the inclined plate portion 26c. It has become.

  The two air blowing units 16 and 16 are respectively disposed above the vent holes 15c and 15c provided in the substrate 15, and are fixed to both ends in the longitudinal direction of the respective fan cases 21 and 21 by bolts 28 (see FIG. 10). The blower units 16 and 16 are attached to the substrate 15 by fastening the L-shaped metal fitting 29 to the substrate 15 with bolts 30.

  The blower 11 including the board 15 and the two blower units 16 and 16 attached to the board 15 is inserted into the blower housing space 10 through the work opening 117 as shown in FIG. Therefore, it is disposed below the radiator 4.

  When the blower 11 is housed in the blower housing space 10, the tip of the substrate 15 is inserted into the inlet of the blower housing space 10 through the work opening 117, and the side plate portions 15 b and 15 b of the substrate 15 are inserted into the guide member 12. The tip of the substrate 15 is placed on the guide member 12 in a state of being positioned inside the upright portions 12b, 12b, and the base plate portion of the guide member is placed along the upright portions (guide rail portions) 12b, 12b in this state. 12a is inserted into the blower housing space 10 while sliding.

  In order to automatically position and fix the blower inserted in the blower housing space 10 at a specified position, the tip of the substrate 15 of the blower 11 that has been guided and slid by the guide member 12 is received and the blower 11 is positioned at the specified position. The positioning member 31 and a fixture for fixing the front end portion of the substrate 15 to the outer box 1 by pressing the portion near the front end of the substrate 15 downward when the front end of the substrate 15 is received by the positioning member 31. 32 is attached to the tip of the guide member 12.

  As shown in FIG. 10, the positioning member 31 is fixed to the tip of the bottom plate portion 12a of the guide member 12, and when the blower 11 is placed at a specified position, the tip of the substrate 15 of the blower (in the illustrated example, The stopper portion 31a that receives the tip of the inclined plate portion 15d) and the overhang portion 31b that protrudes toward the substrate 15 from the upper end of the stopper portion 31a when the blower is disposed at the specified position are integrally provided. The substrate 15 is positioned at a specified position by receiving the tip of the substrate 15 with the stopper portion 31a.

  The fixture 32 is held by the protruding portion 31b of the positioning member 31 so as to be displaceable in the vertical direction, and is arranged in a state where the lower end is in contact with the upper surface of the portion near the tip of the substrate 15 of the blower arranged at the specified position. And a spring (not shown) that urges the pressing member 32a downward. In the present embodiment, a pressing member 32a having a shape with a rounded bottom end is used. In the example shown in FIG. 10, the fixture 32 is composed of a ball plunger screwed into a screw hole provided in the overhanging portion 31b, and the ball of the ball plunger is used as the pressing member 32a. ing.

  In the illustrated embodiment, when the blower 11 is inserted into the blower housing space 10 while the substrate 15 is guided by the guide member 12 in order to place the blower 11 in the blower housing space 10, the blower 11 is moved to the specified position. First, the inclined plate portion 15d abuts against the pressing member 32a. In this state, when the blower 11 is further pushed and the lower end of the pressing member 32a is pushed from the side by the inclined plate portion 15d, the inclined plate portion 15d pushes up the pressing member 32a, and the pressing member 32a is a portion near the tip of the substrate 15. Then, the tip of the inclined plate portion 15d abuts against the stopper portion 32a and is positioned. In this state, the portion near the tip of the substrate 15 is pressed toward the guide member 12 fixed to the outer box by the pressing member 32a biased downward by the spring, so that the blower 11 is It is fixed so that it does not move from the specified position. When pulling out the blower 11 from the blower housing space 10, the tool is hooked on the folded portion 15e of the substrate 15 to pull out the substrate 15, thereby releasing the fixation of the tip of the substrate 15 and making the blower 11 movable. Therefore, the blower 11 can be pulled out easily.

  Wiring for supplying power to the air blowing units 16 and 16 of the air blower 11 so that the air blower 11 can be inserted and pulled out from one short side side plate 104 side of the outer box 1 so that the air blower can be attached and detached. All the connections 30 (see FIG. 6) can be made through the work opening 117 on one short side plate 104 side of the outer box 1.

  In the example shown in FIG. 10, the fixture 32 is constituted by a ball plunger. However, as shown in FIG. 11, a hole provided in the overhanging portion 31 b of the positioning member 31 having a hemispherical pressing member 32 a at the lower end. The fixing tool 32 can also be constituted by a rod 32b fitted to be freely movable up and down, and a spring 32c arranged between the overhanging portion 31b and the pressing member 32a and biasing the rod 32b downward. In the example shown in FIG. 10, a male thread portion is provided on the outer periphery of the portion near the upper end of the rod 32b, and the stroke of the rod 32 and the spring 32c are formed by nuts 32d and 32e screwed into the male thread portion. The urging force is adjusted.

  In the above embodiment, the air intake ports 21 b are provided on the lower and lower surfaces of both sides of the fan case 21 of the blower unit 16, but at least one air intake port 21 b is provided in the lower portion of the fan case 21. The method of providing the air intake port is not limited to the above example.

  In the above embodiment, the ground-mounted transformer device PMT is configured by the outer box 1 and the devices such as the transformer 2, the protection devices 7 and 8, and the blower 11 housed in the outer box 1.

  When the blower housing space 10 extending in the longitudinal direction of the outer box 1 is provided below the radiator 4 and the blower 11 is disposed in the blower housing space as in the above embodiment, the radiator 4 and the outer box are disposed. Since it is not necessary to provide a space for disposing the blower between the side plate 102 and the first side plate 102, the outer box 1 can be prevented from becoming large.

  Further, as in the above-described embodiment, a fan housing space 10 extending in the longitudinal direction of the outer box is provided below the radiator 4, and a fan housing space is provided below the side plate 104 on one short side of the outer box 1. When the working opening 117 that opens one end in the longitudinal direction to the outside is provided, the insertion of the blower 11 into the blower housing space 10 and the extraction of the blower from the blower housing space are performed in the longitudinal direction of the outer box 1. Since it can be carried out through the opening 117 for work provided at the end, if the ground-mounted transformer device is installed near the roadway on the sidewalk, it may be forced to carry out dangerous work, When the apparatus is installed close to the sidewalk building, it is possible to prevent the space for pedestrians from passing through or the apparatus from being unable to be installed.

  Moreover, when the positioning member 31 and the fixture 32 are provided as in the above-described embodiment, the blower 11 is automatically positioned when the blower 11 is inserted into the blower housing space so as not to move from the specified position. Since the fan can be fixed and can be easily released when the fan 11 is pulled out of the fan housing space, the fan can be easily attached and detached.

  When the air guide plate 26 is provided as in the above embodiment, the cooling air sent from the blower unit 16 can flow between the heat dissipating fins f of the radiator 4 and smoothly flow upward as rectification. Therefore, heat exchange in the radiator 4 can be promoted, and the transformer can be efficiently cooled.

  In the above embodiment, the positioning member 31 is attached to the tip of the guide member 12, but the guide member 12 may be attached to an appropriate member fixed to the base 100 of the outer box 1. In the above embodiment, the fixing member 32 is supported by the positioning member 31. However, the fixing member 32 may be supported by a support member provided separately from the positioning member 31.

DESCRIPTION OF SYMBOLS 1 Outer box 100 Base 101 Transformer support plate 102,103 Outer box long side plate 104,105 Outer box short side plate 111 Back side lower ventilation port 112 Gallery 113 Gallery 117 Work opening 118 Cover plate (Gallery )
119 Frame 120 Screw 2 Transformer 3 Transformer tank 301, 302 Long side wall 303, 304 Short side wall 305 Bottom wall 306 Ceiling wall 4 First radiator 5 Second radiator 7 Primary side opening / closing Device 8 Secondary side protection device 10 Blower housing space 11 Blower 12 Guide member 12a Bottom plate portion 12b Standing portion (guide rail portion)
DESCRIPTION OF SYMBOLS 15 Board | substrate of blower 16 Blower unit 21 Fan case 21a Discharge port 21b Air intake port 22 Cross flow fan 23 Motor 26 Air guide plate 31 Positioning member 32 Fixing tool

Claims (7)

Relative in the longitudinal direction with an outer box having a pair of side plates on the long side opposite to the width direction and a pair of side plates on the short side opposite to the longitudinal direction, and a pair of side walls on the long side opposite to the width direction A pair of short side walls and a rectangular parallelepiped transformer tank having a structure in which the transformer body is accommodated, and the pair of long side walls are respectively paired with the long sides of the outer box A transformer housed in the outer box in a state of facing the side plate of the transformer, and a radiator is attached to a side wall on one long side of the transformer tank, the outer box facing the radiator In the ground-mounted transformer device provided with at least one ventilation port with a gallery attached to the lower part of the side plate on one long side of
Below the radiator, a fan housing space extending in the longitudinal direction of the outer box is provided, and a fan for blowing air to the radiator is housed in the fan housing space,
A working opening for opening one end in the longitudinal direction of the blower housing space to the outside and a detachable lid for closing the working opening are provided at a lower portion of the side plate on one short side of the outer box. And
It is configured so that the insertion of the blower into the blower housing space and the withdrawal of the blower from the blower housing space can be performed through the working opening.
A ground-mounted transformer device characterized by The blower has a front end directed toward the other end side in the longitudinal direction of the blower housing space, a substrate inserted into the blower housing space through the working opening, and the fan mounted in the blower housing space together with the substrate. Comprising at least one blower unit configured to be housed,
A guide member that slidably guides the substrate of the blower inserted into the blower housing space through the working opening along the longitudinal direction of the outer box is disposed at a lower portion of the blower housing space, and the outer box. Being fixed against,
The ground-mounted transformer device according to claim 1. A positioning member that receives the tip of the substrate of the blower that has been guided and slid by the guide member and positions the blower at a specified position is provided on the other end side in the longitudinal direction of the blower housing space,
When the front end of the substrate is received by the positioning member, the front end portion of the blower positioned at the specified position is fixed to the outer box by pressing a portion near the front end of the substrate downward. That fixtures are provided,
The ground-mounted transformer device according to claim 2. The positioning member includes a stopper portion that receives a tip of a substrate of the blower when the blower is disposed at the prescribed position, and a substrate side from an upper end of the stopper portion when the blower is disposed at the prescribed position. It has an overhanging part that is in an overhanging state,
The fixture is disposed in a state in which the lower end is in contact with the upper surface of the portion of the blower substrate disposed at the specified position, held by the overhanging portion of the positioning member in a state of being freely displaceable in the vertical direction. A pressing member, and a spring that biases the pressing member downward,
An inclined plate portion inclined downward is provided at the tip of the substrate of the blower,
The lower end of the pressing member is rounded, and the inclined plate portion at the front end of the substrate of the blower inserted into the blower housing space and guided and slid by the lower end of the pressing member from the side The pressing member is pushed up by the inclined plate portion at the tip of the substrate when pushed, and is configured to ride on the portion near the tip of the substrate,
The ground-mounted transformer device according to claim 3. The fan unit is a rectangular parallelepiped fan case that is formed in an elongated shape so as to be housed in the fan housing space, and is provided with a discharge port at the top and an air intake port at least on one of the side surface and the bottom surface. A ground-mounted transformer device according to any one of claims 2 to 4, further comprising: a crossflow fan housed in the fan case. The ground-mounted transformer device according to claim 5 , wherein a wind guide plate for guiding cooling air discharged through the discharge port to the side wall side of the transformer tank is attached to an upper part of the case of the blower unit. . The cover plate that closes the working opening is made of a gallery, and the working opening constitutes another ventilation port,
The other radiator is attached to the side wall on one short side of the transformer tank facing the side plate on one short side of the outer box provided with the working opening. Item 7. A ground-mounted transformer device according to any one of Items 1 to 6.

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