JP4950731B2 - Road-mounted transformer device - Google Patents

Description

  The present invention provides a ventilation opening for dissipating the heat generated from the transformer to the outside, and the installation on the road provided with a drain opening for discharging rainwater entering from the ventilation opening to the outside of the outer box. The present invention relates to a type transformer device.

  A conventional road-mounted transformer device is configured such that a transformer is housed in an outer box together with a switch or the like. The transformer is configured such that the transformer body is housed in a transformer tank together with insulating oil. Usually, a radiator is attached to a predetermined side surface of the transformer tank. In order to efficiently dissipate heat generated from the transformer to the outside, the outer box has upper and lower ventilation openings with appropriate intervals above and below the side wall on which the radiator is installed. Each is provided.

  Rainwater that enters through the upper and lower ventilation openings during rain and dripping down below the transformer tank in the outer box may infiltrate the low-voltage equipment provided below the transformer tank. The transformer is accommodated in the outer box by using a packing interposed between the end of the flange provided around the lower part of the tank and the side wall of the outer box in a compressed state. In order to prevent the rainwater that has entered from flowing out of the outer box without accumulating in the outer box, a large number of drain holes formed in an oblong shape extending through the side wall in the lateral direction are formed on the upper surface of the packing. It is provided along. An on-road transformer device provided with such a drain hole is disclosed in Patent Document 1, for example.

The road-mounted transformer device shown in Patent Document 1 has a configuration in which the low-voltage side device is provided below the transformer tank, but the configuration in which the low-voltage side device is provided in the lateral direction of the transformer tank. On the other hand, there is also a road-mounted transformer device provided with a drain hole so as to prevent rainwater entering from the ventilation port from flowing into the ground in the outer box.
Japanese Patent Laying-Open No. 2004-129403 (FIG. 1)

  The above-mentioned road-mounted transformer device may be installed in an area where there is a large amount of soil, sand, etc. around the place where it is installed. In this case, dirt, sand, etc. wound up by passers-by, wind, etc. enter through the ventilation openings. In particular, if the soil is left until it fills the drain hole, the drain hole may not function. Therefore, the drain hole is periodically scraped and removed by an appropriate method, for example, a thin rod. Since the drain hole cannot be made too large from the viewpoint of security, there is a problem that the work of removing soil or sand becomes complicated.

  An object of the present invention is to provide a road-mounted transformer device that can easily remove soil, sand, and the like that have entered through a ventilation opening.

  In the first invention, a transformer or the like is accommodated in the outer box, and upper and lower ventilation holes for dissipating heat from the transformer to the outside are provided above and below the side wall of the outer box, respectively. The lower ventilation port is intended for road-mounted transformer devices in which the drainage opening for draining rainwater that has entered from the mouth and the lower ventilation port to the outside of the outer box is provided on the side wall of the outer box below the lower ventilation port. A cleaning work opening for cleaning the inside of the outer box is provided on the side wall of the outer box between the water draining opening and the drain opening, and an openable lid or door is attached to the cleaning work opening. It is a thing.

In the second invention, the lid or door of the first invention is formed with a large number of small holes.

  As described above, according to the first aspect of the present invention, the cleaning means is allowed to enter the outer box by attaching an openable / closable lid or door to the cleaning opening. Can be easily taken out and removed.

According to the 2nd invention, in addition to the effect of the 1st invention, the amount of ventilation from a lower vent can be expanded.

  FIG. 1 is a schematic front view showing a first embodiment of a road-mounted transformer device according to the present invention, and FIG. 2 is a schematic view showing a main part of FIG. As shown in the figure, this on-road type transformer device includes a high voltage side equipment storage chamber 2A, a transformer storage chamber 2B, and a box-shaped outer box 2 mounted on a base 1 made of a rectangular frame. The low-pressure device housing chamber 2C is partitioned and arranged in the horizontal direction.

In the high voltage side device storage chamber 2A, a high voltage side door 2A1 is provided on the left side surface of the outer box 2, and high voltage side devices such as a switch and a power fuse (not shown) are accommodated. A transformer (not shown) is accommodated in the transformer accommodating chamber 2B.
In the low pressure side device storage chamber 2C, a low pressure side door 2C1 is provided on the front right side of the outer box 2, and a low pressure side device such as a breaker (not shown) is stored.

  In the front center side of the outer box 2 (transformer accommodation chamber 2B), in order to efficiently dissipate heat generated from the transformer to the outside, an appropriate interval is provided above and below the side wall on the side where a radiator (not shown) is attached. With the open, a transformer upper ventilation port 2B1 and a transformer lower ventilation port 2B2 are provided. The transformer upper ventilation port 2B1 and the transformer lower ventilation port 2B2 are formed, for example, by arranging a large number of small holes (punching holes) penetrating the outer box 2 in a staggered manner.

  On the side wall of the outer box 2 below the transformer lower ventilation port 2B2, for example, at the lower end thereof, there is provided a drain opening 2B3 for discharging rainwater entering from both ventilation ports 2B1 and 2B2 to the outside of the outer box. . In the drain opening 2B3, for example, two U-shaped notches having a small depth are formed upward. These configurations are also provided on the back center side (transformer accommodation chamber 2B).

  On the front center side of the outer box 2 (transformer accommodation room 2B), the soil accumulated inside the outer box through both ventilation openings between the transformer lower ventilation opening 2B2 and the drain opening 2B3, A cleaning work opening 2B4 for taking out and removing sand and the like is provided. As shown in FIG. 1B, the opening 2B4 has a lid mounting seat 2B42 made of a rectangular frame plate welded to the back surface of the outer box along the periphery of the rectangular cutout 2B41 formed in the outer box 2. The cutout 2B41 is formed in a region removed from the lower end of the radiator, that is, a region in which an appropriate interval is ensured between the transformer tank and the side wall of the outer box. The lid mounting seat 2B42 is provided with a rectangular lid (cover) 2B5 that is approximately the same size as the cutout 2B41 formed in the outer box 2 so that the cleaning work opening 2B4 can be freely opened and closed. In a state of being inserted into the notch, for example, it is attached by screwing at four places. An embedded handle 2B6 is attached to the lid 2B5 so as to be easily attached and detached.

  When taking out the soil, sand, etc., the cover (cover) 2B5 is removed, and the soil, sand, etc. are easily removed by pushing the hose of the suction type vacuum cleaner into the cleaning opening 2B4.

FIG. 3 is a schematic front view showing a reference example of a road-mounted transformer device according to the present invention, and FIG. 4 is a schematic view showing a main part of FIG. In the same manner as in FIG. 1, this on-road type transformer device has a high voltage side equipment accommodating chamber 2A ', a transformer, in a box-shaped outer box 2' mounted on a base 1 'made of a rectangular frame. The storage chamber 2B 'and the low-pressure device storage chamber 2C' are partitioned and arranged side by side in the horizontal direction.

  On the front center side of the outer box 2 '(transformer accommodation room 2B'), there are an upper transformer vent 2B1 'and a transformer lower vent 2B2' to efficiently dissipate heat generated from the transformer to the outside. Is provided. The transformer upper ventilation port 2B1 'is formed by staggering a large number of small holes (punching holes) penetrating the outer box 2'.

  At the lower end of the side wall of the outer box 1 ', there is provided a drain hole → drain opening 2B3' for draining rainwater entering from both ventilation openings 2B1 'and 2B2' to the outside of the outer box. The drain opening 2B3 'has two U-shaped notches formed upward.

  The transformer lower ventilation port 2B2 'is formed so as to be used also as an opening for cleaning work for taking out and removing soil, sand, etc. accumulated inside the outer box through the ventilation port, as shown in FIG. As shown, a lid mounting seat 2B22 'made of a rectangular frame plate is attached to the back surface of the outer box by welding or the like along the periphery of a rectangular cutout 2B21' formed in the outer box 2 '. The cutout 2B21 'is formed in a region whose lower end is located in the vicinity of the drainage opening 22B3'. This lid mounting seat 2B22 'has a rectangular ventilation lid (cover) that is approximately the same size as the cutout 2B21' formed in the outer box 2 'so that the transformer lower ventilation port 2B2' can be freely opened and closed. 2B5 'is fitted in this notch, for example, with 8 screws. An embedded handle 2B6 'is attached to the ventilation lid (cover) 2B5' so as to be easily attached and detached.

  When taking out soil, sand, etc., the cover (cover) 2B5 'for ventilation is removed, and the hose of the suction cleaner is pushed into the lower ventilation port 2B2' of the transformer, so that the soil, sand, etc. are easily removed.

  In each of the above embodiments, a door may be used instead of the lid (cover) 2B5. Further, a ventilation door may be used instead of the ventilation lid (cover) 2B5 '.

  In the first embodiment, a large number of small holes may be formed in the lid (cover) 2B5 or the door.

1 is a schematic front view showing a first embodiment of a road-mounted transformer device according to the present invention. It is an enlarged view which shows the principal part of FIG. It is a schematic front view which shows the reference example of the road installation type transformer apparatus concerning this invention. It is an enlarged view which shows the principal part of FIG.

2,2 'Outer box 2B1, 2B1' Upper vent 2B2, 2B2 'Lower vent 2B3, 2B3' Drain opening 2B4, 2B4 'Cleaning work opening 2B5 Lid or door 2B5' Ventilation lid or vent door

Claims (2)

A transformer or the like is housed in the outer box, and upper and lower ventilation holes for dissipating heat from the transformer to the outside are provided above and below the side wall of the outer box, respectively, In a road-mounted transformer device in which a drainage opening for draining rainwater that has entered from the ventilation port to the outside of the outer box is provided on the side wall of the outer box below the lower ventilation port,
A cleaning work opening for cleaning the inside of the outer box is provided on a side wall of the outer box between the lower ventilation opening and the drain opening, and a lid that can be opened and closed to the cleaning work opening. Or a road-mounted transformer device with a door attached. The road-mounted transformer device according to claim 1, wherein the lid or door is formed with a large number of small holes.

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