JP2012195997A - Ground installation type transformer device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a foreign material from entering an outer box through a gap between blades of a louver, relating to a ground installation type transformer device in which the louver is fitted to a ventilation opening of the outer box.SOLUTION: First and second louver elements 21 and 22 are provided in which blades 26 and 42 protruding diagonally to the rear surface side from a front surface are provided inside ventilation openings 25 and 41. The louver elements are arranged in such a manner that the blades are faced each other, to constitute a louver 20. The blades 26 and 42 of the first and second louver elements are provided in such a manner that they are shifted relative to each other vertically, so that gaps G formed between blades 26 and 26, adjoining each other, of the first louver element 21 are hidden from an apparatus stored in an outer box 10 by the blade 42 of the second louver element 22.

Description

  The present invention relates to a ground-mounted transformer device installed on a sidewalk or the like.

  A ground-mounted transformer device has a structure in which an electric device including a distribution transformer is accommodated in an outer box, and is usually installed on a shoulder of a sidewalk. Since the transformer housed in the outer box generates heat during operation, ventilation to discharge the hot air in the outer box to the outside and allow the external cold air to flow into the outer box on the outer wall of the outer box. A mouth is provided. A louver (also called a louver) is attached to the vent to prevent passers-by from touching the equipment in the outer box through the vents and inserting foreign objects into the outer box through the vents. It is done.

  FIG.7 and FIG.8 has shown the louver 1 widely used for the ground installation type transformer apparatus. This louver is composed of a rectangular metal plate 2, and is formed with a plurality of horizontally long vents 3, 3,... (See FIG. 8) arranged in the vertical direction through the metal plate. A plurality of blades 4, 4,... Respectively corresponding to the vents 3, 3,... Are formed so as to hide the vents 3, 3,.

  Each wing plate 4 is provided in a state in which the base end portion is integrated with the upper edge portion 3a of the upper and lower edge portions 3a, 3b of the corresponding vent 3, and obliquely downward from one surface of the metal plate 2 Is bent so as to protrude.

  The illustrated louver 1 is disposed in a state in which the peripheral portion of the metal plate 2 is in contact with the peripheral portion of a rectangular vent provided in the outer wall of the outer box of a ground-mounted transformer device (not shown), Screwed to the outer wall of the outer box.

  The louver 1 shown in FIG. 7 and FIG. 8 has a function of preventing a relatively large object from entering the outer box, but as shown in FIG. When a thin foreign object such as the stick 5 is inserted through the foreign object, the foreign object cannot be prevented from entering the outer box. Therefore, when a ground-mounted transformer device having a louver as described above attached to a ventilation opening is installed on a sidewalk, foreign matter such as the rod 5 is put into the outer box through a gap between adjacent slats 4, 4. There is a risk that an electric shock accident or a ground fault may occur due to mischievous insertion. In order to make it impossible to insert foreign objects, it is conceivable to make the ventilation holes provided in the louvers sufficiently small. However, if the ventilation holes are made small enough to prevent the entry of foreign objects, ventilation in the outer box will be efficient. Since it cannot be performed well, the temperature in the outer box rises, which hinders the operation of the transformer device.

  Therefore, as shown in Patent Document 1, a louver including a slat having a mountain-shaped cross section has been proposed. As shown in FIG. 9, the ventilation port shown in Patent Document 1 has a large number of mountain-shaped (inverted V) having an inclined plate 4a 'arranged on the outside and an inclined plate 4b' arranged on the inside. The blades 4 ′ (character-shaped) are arranged side by side in the vertical direction, and these blades are connected by a connecting support member 6. According to this louver 1 ', it is possible to prevent foreign matter from being inserted into the outer box by appropriately setting the positional relationship between adjacent chevron blades.

JP 2003-274523 A

  The louver 1 'shown in FIG. 9 has a structure in which a large number of mountain-shaped slats 4' are arranged one above the other so that it takes time to manufacture the slats and the louver structure is complicated. There was a problem. Further, since welding is required to connect the chevron blade 4 'and the connecting member 6, it takes time to manufacture the louver, and the manufacturing cost is inevitable.

  An object of the present invention is to provide a ground-mounted transformer device in which a louver can have a function of reliably preventing foreign matter from being inserted into an outer box without increasing costs. .

  The present invention is directed to a ground-mounted transformer device having a structure in which an electric device including a transformer is accommodated in an outer box, and having a louver attached to a ventilation port provided on an outer wall of the outer box.

  In the present invention, the louver is composed of a metal plate having a main plate portion disposed so as to close the ventilation port and a mounting portion attached to the peripheral portion of the ventilation port, and a plurality of horizontally long ventilation ports arranged in the vertical direction. Are provided penetrating through the main plate portion, and a plurality of protrusions projecting obliquely upward from the front surface side to the back surface side of the main plate portion in a state where the base end portion is integrated with the lower edge of each of the plurality of vent holes. These horizontally long slats are provided with first and second louver elements provided inside each of the plurality of vent holes.

  The first louver element and the second louver element are arranged in a state where the surface of each main plate portion faces the outside and inside of the outer box and the wing plates face each other. The attachment part of 2 louver elements is attached to the peripheral part of a ventilation port. The respective slats of the first and second louver elements are provided in a state of being relatively displaced in the vertical direction, and each gap formed between adjacent slats of the first louver element is the first. The wing position shift amount of the first and second louver elements and the size of the slats of both louver elements are concealed from the equipment accommodated in the outer box by any of the slats of the two louver elements. Is set.

  When configured as described above, the gaps formed between the adjacent slats of the first louver element are concealed from the equipment in the outer box by the slats of the second louver element disposed on the inside. It is possible to prevent foreign matter such as a rod from being inserted into the outer box through the gap between the louvers of one louver element, and to improve the protection grade against the entry of foreign matter in the ground-mounted transformer device.

  Further, when configured as described above, when it rains, each slat of the first louver element provided in a state of projecting obliquely upward toward the inside of the outer box receives the rain and is outside. Therefore, it is possible to suppress rain from entering the outer box through the vent and to improve the degree of protection against water intrusion.

  Each of the louver elements has a simple structure in which a wing plate is formed integrally with a metal plate, and therefore can be manufactured at low cost. Therefore, according to the present invention, it is possible to improve the protection grade of the ground-mounted transformer device by providing the outer box of the ground-mounted transformer device with a function of preventing the entry of foreign objects without increasing the cost. it can.

  Each of the slats of the first and second louver elements bends an inner portion of a horizontally long U-shaped cut formed by cutting a part of a metal plate constituting each louver element. It can be formed by.

  When the slats are provided as described above, each louver element can be easily manufactured by pressing, so that each louver element can be manufactured at low cost.

  In a preferred aspect of the present invention, the ventilation opening is formed to have a quadrangular contour shape. The first louver element has a quadrangular bottom plate portion constituting the main plate portion and four side plate portions protruding perpendicularly from the four sides of the bottom plate portion to the same side, and is opposite to the bottom plate portions of the four side plate portions. Each of which has a box-shaped main body portion having an open end and an outer collar portion formed at the open end of the main body portion, and a plurality of vents and slats The bottom plate portion is formed in a state of being positioned inside the main body portion. In the first louver element, an outer flange portion formed at the opening end of the main body portion constitutes an attachment portion. In addition, the second louver element is formed of a quadrangular plate in which a peripheral portion along four sides constitutes a mounting portion, and a region surrounded by the mounting portion is a main plate portion, and a plurality of ventilation holes are formed in the main plate portion. Mouth and slats are formed. When comprised in this way, the outer surface of the baseplate part of the 1st louver element turns into the surface of the main board part of the 1st louver element, and the 1st louver element makes the outer surface of the baseplate part the outer side of an outer box It is arranged in the state facing toward. The second louver element is disposed in a state in which the slat is opposed to the slat of the first louver element and the mounting portion is overlapped with the outer flange portion of the first louver element. The outer flange portion of the element and the mounting portion of the second louver element are fastened together with screws and fastened to the peripheral portion of the ventilation port.

  When comprised as mentioned above, the rain receiving member which receives the rainwater which flowed down along the 2nd louver element is attached to the lower part of the 2nd ventilation opening, and the rain receiving member is installed in the lower part of the 2nd louver element. A drain port for discharging the accumulated water into the first louver element is formed, and the water that has flowed into the first louver element is lowered on the side plate provided on the lower end side of the main body of the first louver element. It is preferable to form a drain hole to be dropped.

  If comprised as mentioned above, the rain water which penetrate | invaded the inside of the 2nd louver element will be received by a rain receiving member, the discharge port provided in the lower part of the 2nd louver element, and the 1st louver element Since it can be discharged to the outside through the drain hole provided in the lower part, it is possible to prevent rainwater that has entered through the louver from flowing into the outer box, and to further improve the protection against water intrusion. .

  In a preferred aspect of the present invention, a closing lid attaching tool for detachably attaching a closing lid for closing the entire vent hole of the first louver element is attached to the outer surface side of the first louver element.

  As described above, the first louver is attached to the outer surface side of the first louver element by attaching a closing lid attachment for detachably attaching the closing lid that covers the entire vent hole of the first louver element. By attaching a closure lid to the element, the outer box can be easily modified to a dust-proof structure that prevents intrusion of dust and sand, and the protection grade against intrusion of dust and sand can be improved.

  According to the present invention, the louver attached to the ventilation port of the outer box is constituted by the first and second louver elements having a plurality of slats projecting obliquely upward from the front surface to the back surface side. The surface of the main plate part of the louver element is directed to the outside and inside of the outer box, the wing plates of the louver elements are opposed to each other, and the louvers of both louver elements are shifted relative to each other. Since each gap between the slats of the first louver element to be arranged is concealed from the electrical equipment in the outer box by the slats of the second louver element, the inner structure of the outer louver can be reduced without complicating the louver structure. This eliminates the possibility of foreign objects such as sticks being inserted into the body and improves the degree of protection against the insertion of foreign objects.

  Further, according to the present invention, when it rains, each slab of the first louver element inclined obliquely upward toward the inner side of the outer box allows the rain hitting the louver to flow outward. Therefore, it is possible to prevent rain from entering the outer box through the vent of the louver and improve the protection against water intrusion.

  According to the present invention, since the louver element having a simple structure in which the wing plate is protruded from the edge of each ventilation hole penetrating the metal plate constitutes a louver having a function of preventing the entry of foreign matter, It is possible to obtain a ground-mounted transformer device with improved protection against the invasion of foreign matters without causing an increase in cost.

It is a perspective view which shows the external appearance of the ground installation type transformer apparatus concerning one Embodiment of this invention. It is the disassembled perspective view which showed the ventilation opening provided in the outer case of a transformer apparatus in the same embodiment, and the louver attached to this ventilation opening. (A) is the front view of the 1st louver element which comprises the louver used in the embodiment, (B) and (C) are the right side view and bottom view of (A), respectively, (D) is the same implementation It is explanatory drawing explaining the method of forming a slat in the louver element used by a form. (A) is an enlarged cross-sectional view showing the first louver element taken along the line IV-IV shown in FIG. 3 (A), and (B) is a first louver element that constitutes the louver together with the first louver element. It is sectional drawing of 2 louver elements. (A) is sectional drawing which showed the state which attached the 1st louver element and the 2nd louver element to the ventilation port, and comprised the louver, (B) is when a foreign material is inserted in the louver of (A) It is the expanded sectional view which showed the state. It is sectional drawing which showed the state which attached the closing lid attachment tool to the outer side of the 1st louver element. (A) is the front view which showed the louver used with the conventional ground installation type transformer apparatus, (B) is sectional drawing shown along the B'-B 'line of (A). . FIG. 8 is an enlarged cross-sectional view illustrating a state where a foreign object is inserted into the louver illustrated in FIG. 7. It is sectional drawing which showed the other louver used with the conventional ground installation type transformer apparatus.

An embodiment of the present invention will be described in detail with reference to FIGS.
FIG. 1 shows the appearance of a ground-mounted transformer device according to this embodiment. In FIG. 1, reference numeral 10 denotes a pair of side walls 10a and 10b opposed to the width direction, and side walls 10c opposed to the longitudinal direction. It is a rectangular parallelepiped outer box provided with the outer wall which consists of 10d and the ceiling wall 10e, and the base 10f. An outer wall of the outer box 10 is made of a metal plate such as a steel plate, and an electric device including a distribution transformer and its accessory devices is accommodated therein. On the side wall 10a of the outer box 10, four rectangular ventilation openings 11, 11,. The other two side walls 10c adjacent to the side wall 10a are formed with two other vent holes 11 (not shown) that are also formed in a quadrangular shape. Each ventilation port 11 is provided so that it may be located in the side of the transformer accommodated in the outer case 10, and ventilation in the outer case is carried out to each ventilation port in the state which concealed the electric equipment in an outer case. A louver 20 is attached to make it happen. The ground-mounted transformer device 30 is configured by the outer box 10 and the electrical equipment accommodated therein.

  The ceiling wall 10e of the outer box 10 is formed with four bolt holes 10g for attaching the hanging brackets, and the hanging brackets used when carrying the transformer device can be attached to these bolt holes 10g. ing. After installing the transformer device, a bolt is screwed into each bolt hole 10g, and each bolt hole 10g is closed by this bolt.

  As shown in FIG. 2, the louver 20 used in the transformer device of this embodiment includes a first louver element 21 and a second louver element 22. The first louver element 21 and the second louver element 22 are metal having main plate portions 21 a and 22 a arranged so as to close the ventilation port 11, and attachment portions 21 b and 22 b attached to the peripheral portion of the ventilation port 11. It consists of a board. In the main plate portions 21a and 22a of the first louver element 21 and the second louver element 22, a plurality of horizontally long vent holes arranged in the vertical direction penetrate the main plate portions 21a and 22a in the plate thickness direction. The main plate portion 21a is provided in a state in which a base end portion is integrated with a lower edge portion of each of the plurality of vent holes provided in the main plate portions 21a and 22a. And 22a are provided with a plurality of horizontally long slats projecting obliquely upward from the front surface side to the back surface side. The first louver element 22 used in the present embodiment is provided with a plurality of rows of vent holes arranged in the vertical direction so as to be arranged in the horizontal direction.

  More specifically, as shown in FIG. 3, the first louver element 21 includes a bottom plate portion 23a having a quadrangular contour shape and four side plates protruding perpendicularly from the four sides of the bottom plate portion 23a to the same side. A box-shaped main body 23 having openings 23b to 23e and having an opening formed on the end side opposite to the bottom plate 23a of the side plates 23b to 23e, and the opening of the main body 23. And an outer casing 24. In the first louver element, a main plate portion 21a is constituted by the bottom plate portion 23a, the outer surface of the bottom plate portion 23a is the surface of the main plate portion, and the inner surface of the bottom plate portion 23a is the back surface of the main plate portion. . The outer flange portion 24 constitutes an attachment portion 21b.

  As shown in FIGS. 4A and 5B, the bottom plate portion (main plate portion) 23a of the main body portion 23 has a plurality of horizontally long rectangular vents 25, 25 having the same shape and the same dimensions. Are arranged side by side at equal pitch intervals in the vertical direction, and the inner side of each of the plurality of vents 25, 25,... Is based on the lower edge of each of the plurality of vents 25, 25,. A plurality of horizontally long blades 26, 26 projecting obliquely upward from the front surface side to the back surface side (inside the main body portion 23) of the bottom plate portion (main plate portion) 23a in a state where the end portions 26a, 26a,. , ... are formed. As shown in FIG. 3D, the vent 25 and the wing plate 26 are formed in a horizontally long U-shaped cut 27 formed by cutting a part of a metal plate constituting the bottom plate portion 23a by laser processing or the like. It is formed by bending the inner part 28 of the slanting diagonally.

  As shown in FIG. 3C, when the first louver element 21 is attached to the ventilation port, the water that has flowed into the first louver element through the side plate portion 23b positioned at the lowermost end is penetrated. A drain hole 30 is formed to allow the water to fall downward. The first louver element mounting portion (outer flange portion) 21b is provided with an appropriate number of mounting holes 31 through which screws used for mounting the element to the ventilation port are passed.

  As shown in FIGS. 2 and 4B, the second louver element 22 has a peripheral portion along the four sides constituting a mounting portion 22b, and a region surrounded by the mounting portion is a main plate portion 22a. Are formed in a rectangular metal plate, and a plurality of vent holes 41, 41,... And wing plates 42, 42,. The vent holes 41, 41,... Are formed in a horizontally long rectangular shape, and the wing plates 42, 42,... Are integrated with the lower end edges of the vent holes 41, 41,. In this state, the main plate portion 22a is provided so as to protrude obliquely upward from the front surface side to the back surface side. The vent 41 and the slat 42 can be formed in the same manner as the vent 25 and the slat 26 of the first louver element. The plurality of vent holes 41 and slats 42 provided in the second louver element 22 are formed to have the same shape and the same size, and are arranged in the vertical direction at equal pitch intervals. The attachment portion 22b of the second louver element 22 is provided with the same number of attachment holes as the attachment holes 31 provided in the attachment portion 21b of the first louver element so that the attachment holes 31 can be aligned. . At the lower part of the second louver element 22, there is a discharge port 22c that is positioned below the lowermost end of the row of vent holes and discharges water accumulated in a rain receiving member to be described later into the first louver element. (See FIG. 2) is formed. The discharge port 22c is formed in a slit shape extending in the horizontal direction.

  In the present invention, the louver is configured by disposing the first louver element 21 and the second louver element 22 with the air vents and the slats facing each other. The number of ventilation holes provided in the first and second louver elements 21 and 22 and the arrangement pattern of the ventilation holes may be different for each louver, but the first louver elements combined with each other to form a specific louver. The number, the arrangement pattern, and the arrangement pitch of the vent holes provided in 21 and the second louver element 22 are set to be equal.

  Further, the plurality of slats 26, 26,..., 42, 42,... Of the first and second louver elements 21 and 22 are respectively positioned at the base end portions 26a, 26a,. Are provided in a state shifted relative to each other in the vertical direction, and each gap formed between adjacent slats of the first louver element 21 is formed by any slat of the second louver element 22. The amount of displacement between the wing plate 26 of the first louver element 21 and the wing plate 42 of the second louver element 22 and the size of each wing plate are set so as to be hidden from the equipment accommodated therein. Has been. In the present embodiment, as shown in FIG. 5, the base end part 42 a of the slat 42 of the second louver element 22 is replaced with the base end part 26 a of the slats 26, 26 adjacent to the first louver element 21. The position shift amount between the wing plate 26 of the first louver element 21 and the wing plate 42 of the second louver element 22 is set so as to be positioned at an intermediate position between the louver elements 26a. That is, the blades 26 of the first louver element 21 and the blades 42 of the second louver element 22 are provided with a phase difference of 180 °.

  In this embodiment, as shown in FIG. 1 and FIG. 2, first and second louver elements 21 and 22 constituting each louver attached to a ventilation opening provided in the side wall 10 a of the outer box 10. Are arranged in an arrangement pattern in which two rows of vents formed of a plurality of vents arranged in the vertical direction are arranged in the horizontal direction, and constitute the first and second louvers provided on the side wall 10c of the outer box 10. The vents of the second louver element are arranged in an array pattern in which three rows of vents composed of a plurality of vents arranged in the vertical direction are arranged in the horizontal direction.

  The first and second louver elements 21 and 22 constituting each louver are respectively directed to the outer side and the inner side of the outer box 10 with the surfaces of the main plate portions (the surfaces on which the slats do not protrude) facing each other. .. And 42, 42,... Are arranged facing each other, and the mounting portions 21 b and 22 b of both louver elements are overlapped with each other with screws 45 (see FIG. 2). Fastened and fastened to the peripheral edge of the vent 11.

  In the present embodiment, as shown in FIG. 2, a partition plate 47 is disposed between the first louver element 21 and the second louver element 22 to partition between a plurality of vent holes. This partition plate is fastened to the first and second louver elements 21 and 22 by screws.

  Further, a rain receiving member 48 extending in the lateral direction along the lower end edge of the ventilation port 11 is attached to the inside of the lower end of the ventilation port 11. As shown in FIG. 5 (A), the rain receiving member 48 is located between the lower end side surface of the second louver element 22 and the upper surface of the edge of the lower end of the ventilation port 11 as the bottom surface. It consists of a plate-shaped member configured to form a water reservoir groove 49 closed at both ends, and is tightened together with the first louver element 21 and the second louver element 22 by a screw 45 for ventilation. It is fixed to the lower end of the mouth 11. A space in the groove 49 formed between the rain receiving member 48 and the lower end of the second louver element 22 is first through the discharge port 22c (see FIG. 2) formed at the lower end of the second louver element 22. The louver element 21 communicates with the inside.

  In the present embodiment, as shown in FIG. 6, a closing lid 50 that detaches the entire vent hole of the first louver element 21 is detachably attached to the outer surface side of the main body portion of the first louver element 21. A closing lid attachment 51 is attached. The illustrated closing lid mounting tool 51 is provided between a pair of mounting brackets 51 </ b> A and 51 </ b> B disposed along both edges in the lateral direction of the ventilation port 11, and between the closing lid 50 and the first louver element 21. The spacer 52 includes a spacer 52 that interposes and holds a gap between the closing lid 50 and the first louver element 21.

  The mounting brackets 51A and 51B are provided so as to extend vertically along the left and right edges of the ventilation port 11, and are fastened to the left and right peripheral portions of the ventilation port 11 together with the first and second louver elements 21 and 22. Plate-shaped base portion 51a, a standing wall portion 51b rising from one end in the width direction of the base portion 51a in a direction away from the main body portion of the first louver element 21, and a side opposite to the base portion 51a from the tip of the standing wall portion 51b A projecting portion 51c projecting from the bottom, and a closing lid receiving portion 51d formed between the lower end of the base portion 51a and the lower end of the standing wall portion 51b. The mounting brackets 51A and 51B are arranged in a state in which the ends of the overhang portions 51c and 51c are opposed to each other, and the base portions 51a and 51a are attached to the mounting portions 21b and 22b of the first and second louver elements 21 and 22, respectively. At the same time, it is fixed to the peripheral edge of the ventilation port 11 by being fastened together with a screw 45.

  The closing lid 50 is inserted between the overhanging portions 51c and 51c of the mounting brackets 51A and 51B and the main plate portion 21a of the first louver element 21, and the lower end thereof is the closing lid receiving portion 51d of the mounting brackets 51A and 51B. By being received by 51d, the whole vent hole of the 1st and 2nd louver elements 21 and 22 is held. The spacer 52 is fixed to the closing lid 50 or the bottom plate portion of the first louver element 21.

  If comprised as mentioned above, the clearance gap G (refer FIG. 5A, B) between the adjacent wing boards 26 and 26 of the 1st louver element 21 arrange | positioned outside will become the 2nd louver element arrange | positioned inside. As shown in FIG. 5 (B), the adjacent wing plates of the first louver element 21 are completely hidden from the transformers and other devices arranged in the outer box by the wing plates 42. When a foreign object such as the rod 5 is inserted through the gap G between the 26 and 26, the foreign object can be prevented from entering the outer box regardless of the direction in which the foreign object is inserted. .

  Therefore, according to the present invention, it is possible to prevent foreign matter such as a rod from being inserted into the outer box through the gap G between the slats of the first louver element 21, and ground faults due to insertion of the foreign matter into the outer case. It is possible to prevent accidents and electric shocks from occurring.

  Moreover, when comprised as mentioned above, when it rains, each blade 26 of the 1st louver element provided in the state which protruded diagonally upward toward the inside of an outer box receives rain, and it flows outside Therefore, rain can be prevented from entering the outer box through the vent hole 25.

  In the unlikely event that rain passes through the vent and enters the inside of the second louver element 22, the rain water that has flowed down through the inside of the second louver element 22 can be received by the rain receiving member 48, After the water accumulated in the groove 49 inside the rain receiving member 48 flows into the first louver element 21 through the discharge port 22c (see FIG. 2) formed at the lower end of the second louver element 22. The first louver element 21 can be discharged to the ground through the drain hole 30 at the lower end. Therefore, if comprised as mentioned above, it can suppress that a rain penetrate | invades in an outer case, and can improve the protection grade with respect to the penetration | invasion of water.

  In addition, as in the above-described embodiment, the closing lid is detachably attached to the outer surface side of the bottom plate portion 23a of the main body portion 23 of the first louver element 21 so as to close the entire vent hole of the first louver element 21. If the attachment tool 51 is attached, the closing lid 50 can be attached to the louver 20 as necessary, and the outer box can be easily modified to a dust-proof structure that prevents intrusion of dust and dust.

  In the above embodiment, the rain receiving member 48 is attached to the inside of the lower end of the exhaust port 11 so that the water accumulated inside the rain receiving member 48 can be discharged to the outside. If it is not necessary to improve the grade, the rain receiving member 48 can be omitted.

  Further, in the above-described embodiment, the closing lid attaching tool 51 for detachably attaching the closing lid for closing the entire vent hole of the first louver element is attached to the outer surface side of the first louver element, and the first louver element is attached as necessary. It is possible to improve the dust-proof structure by attaching a closing lid 50 to the louver element, but if it is not necessary to improve the protection class against the intrusion of dust and sand, the closing lid mounting tool is omitted. be able to.

DESCRIPTION OF SYMBOLS 10 Outer box 11 Ventilation port 20 Louver 21 1st louver element 21a Main plate part of 1st louver element 21b Attachment part of 1st louver element 22 2nd louver element 22a Main plate part of 2nd louver element 22b 2nd Louver element mounting portion 23 body portion of first louver element 23a bottom plate portion (main plate portion) of body portion
24 Outer collar part (mounting part)
25 Ventilation hole of first louver element 26 Vane board of first louver element 41 Ventilation hole of second louver element 42 Vane board of second louver element 50 Closing lid 51 Closing lid mounting tool

Claims (5)

In a ground-mounted transformer device having a structure in which an electric device including a transformer is accommodated in an outer box, and a louver is attached to a ventilation port provided in an outer wall of the outer box,
The louver is made of a metal plate having a main plate portion arranged so as to close the ventilation port and a mounting portion attached to a peripheral portion of the ventilation port, and a plurality of horizontally long ventilation holes arranged in the vertical direction are the main plate. A plurality of protrusions projecting obliquely upward from the front surface side to the back surface side of the main plate portion in a state where the base end portion is integrated with the lower edge portion of each of the plurality of vent holes. A horizontally long slat includes first and second louver elements provided inside each of the plurality of vents,
The first louver element and the second louver element are arranged in a state where the surface of each main plate portion faces the outside and inside of the outer box and the wing plates face each other. And an attachment portion of the second louver element is attached to a peripheral portion of the ventilation port,
Each vane of each of the first and second louver elements is provided in a state of being relatively displaced in the vertical direction, and each gap formed between adjacent vanes of the first louver element. The wing position shift amount of the first and second louver elements and the wings of both louver elements are hidden so as to be concealed from the equipment accommodated in the outer box by any of the slats of the second louver element. The size of the board is set,
A ground-mounted transformer device characterized by   Each of the slats of the first and second louver elements bends an inner portion of a horizontally long U-shaped cut formed by cutting a part of a metal plate constituting each louver element. The ground-mounted transformer device according to claim 1, wherein the ground-mounted transformer device is formed by: The ventilation port is formed to have a quadrangular outline shape,
The first louver element has a quadrangular bottom plate portion constituting the main plate portion and four side plate portions protruding at right angles from the four sides of the bottom plate portion to the same side, and a bottom plate portion of the four side plate portions, A plurality of vent holes having a box-shaped main body portion having an open end on the opposite side and an outer flange portion that is formed at the open end of the main body portion and forms the attachment portion; A wing plate is formed on the bottom plate portion with each wing plate positioned inside the main body portion,
The second louver element is formed of a quadrangular plate in which a peripheral portion along four sides constitutes the mounting portion, and an area surrounded by the mounting portion is the main plate portion. The plurality of vents and slats are formed,
The outer surface of the bottom plate portion of the first louver element is the surface of the main plate portion of the first louver element, and the first louver element has the outer surface of the bottom plate portion facing the outside of the outer box. Arranged in a state,
The second louver element has its wing plate opposed to the wing plate of the first louver element, and its attachment portion is overlapped with an outer flange portion constituting the attachment portion of the first louver element. Arranged,
The ground-mounted transformer according to claim 1 or 2, wherein an outer flange portion of the first louver element and an attachment portion of the second louver element are fastened together with a screw and fastened to a peripheral portion of the ventilation port. Equipment. A rain receiving member for receiving rainwater flowing down along the second louver element is attached to a lower portion of the second ventilation port,
A discharge port for discharging water accumulated in the rain receiving member into the first louver element is formed at a lower portion of the second louver element,
The side plate provided on the lower end side of the main body of the first louver element is formed with a drain hole for dropping the water that has flowed into the first louver element downward,
The ground-mounted transformer device according to claim 3.   5. A closing lid attaching tool for detachably attaching a closing lid for closing the whole vent hole of the first louver element is attached to the outer surface side of the first louver element. The ground-mounted transformer device as described.

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