JP2023163765A - Flood protection type cubicle power-receiving facility - Google Patents

Abstract

To provide a flood protection type cubicle power-receiving facility capable of preventing water from flooding into the facility as much as possible, without causing hindrance with a relatively inexpensive structure, even when the water level around the facility rises.SOLUTION: A flood protection type cubicle power-receiving facility 1 comprises: a housing 5 provided with a floor part 2, a roof part 3, and a side wall part 4 covering a side face between the floor part 2 and the roof part 3; and a conversion device 8 that is stored inside the housing 5 and converts high-voltage power input via a high-voltage cable 6 into low-voltage power to be output to a low-voltage cable 7. The section of the housing 5, spanning from the floor part 2 to a predetermined height of the side wall part 4, constitutes a flood protection part 9 that exhibits water-tightness, thereby preventing water immersion from outside.SELECTED DRAWING: Figure 1

Description

The present invention relates to a cubicle-type high-voltage power receiving equipment, and relates to a water-proof cubicle power receiving equipment that has excellent protection performance against water damage.

Conventionally, cubicle-type high-voltage power receiving equipment has been designed to reduce damage caused by water damage, and by covering the entire casing of the equipment with an airtight protective material, even if the surrounding area is flooded, water will not enter the casing and prevent various damage. Equipment that prevents equipment from being submerged in water is known (for example, see Patent Document 1).

In this equipment, the internal volume of the protective member is determined by balancing the compressive force against the sealed air inside the protective member by water that has entered from the lower part of the protective member and the repulsive force of the compressed air when the protective member is flooded at a predetermined water level. Accordingly, the water level inside the protection member is determined so as to be limited within the permissible value.

JP2012-255322A

However, according to the equipment disclosed in Patent Document 1, the rise in the level of water entering from a portion below the lower end of the protective member is restricted by the pressure of the sealed air inside the protective member. It is necessary to allow water to flood to a certain level in the lower part of the building.

In addition, the pressure of the sealed air used to keep the inside of the device airtight using protective members increases rapidly depending on the height of the water level around the device. In order to maintain this, a considerable amount of cost is required to install a housing covered with a protective member. Furthermore, since the entire casing of the equipment is covered with an airtight protective member, it is difficult to properly ventilate the inside of the casing.

In view of the problems of the prior art, it is an object of the present invention to provide a water-proof cubicle power receiving equipment that can prevent water from entering the equipment as much as possible with a relatively inexpensive configuration and without any problems even when the water level around the equipment rises. It is in.

The waterproof cubicle power receiving equipment of the present invention includes:
A casing including a floor, a roof, and a side wall that covers a side surface between the floor and the roof;
a conversion device that is housed inside the housing and converts high voltage power input via a high voltage cable into low voltage power and outputs the same to the low voltage cable;
A portion of the housing from the floor portion to a predetermined height of the side wall portion constitutes a watertight waterproof portion that prevents water from entering from the outside.

According to the present invention, even if the water level around the water-proof cubicle power receiving equipment rises, water can be prevented from entering the equipment as long as the water level does not exceed the upper end of the water-proof part, so that the equipment cannot receive power due to water damage. This can prevent the conversion device from being damaged.

Moreover, since this effect is mainly obtained by providing a water-proof section in the casing, it can be achieved with a cheaper structure than when the casing is sealed in a portion other than the lower part. Furthermore, compared to the case where the housing is configured in a sealed state, it is possible to completely prevent water from entering from the lower part of the housing.

In the present invention, an upper inlet for the high-voltage cable and an upper outlet for the low-voltage cable into the housing are provided in a portion of the side wall above the water-proof section,
On the outer surface of the side wall part,
a high voltage introduction path whose lower end has a lower inlet for the high voltage cable at the height of the lower end of the side wall, and whose upper end is connected to the upper inlet;
A low voltage lead-out path may be provided, the lower end of which has a lower outlet for the low voltage cable at the height of the lower end of the side wall, and the upper end connected to the upper outlet.

In the present invention, the high-voltage cable is introduced from an external high-voltage power source into the converter of the water-proof cubicle power receiving equipment through the lower inlet and the upper inlet of the high-voltage introduction path. On the other hand, the low-voltage cable is led out from the converter through the upper and lower outgoing ports of the low-voltage outgoing path, and wired to necessary external facilities. High-voltage power input from an external high-voltage power source to the converter via the high-voltage cable is converted into low-voltage power by the converter, output to the low-voltage cable, and supplied to an external facility.

Therefore, despite the presence of the water-proof section, it is possible to introduce the high-voltage cable to the conversion device within the housing and to lead out the low-voltage cable from the conversion device without any problem.

In the present invention, a ventilation fan is provided in a portion of the side wall portion above the flood protection portion; a ventilation fan is provided inside the side wall portion, a lower end portion is opened at the height of the lower end portion of the side wall portion; and a ventilation duct connected to the ventilation fan. According to this, during normal operation without water damage or the like, the heat generated by the converter can be properly discharged to the outside through the ventilation duct by the ventilation fan, and the temperature of the converter can be maintained appropriately.

In this case, ventilation holes may be provided in the roof, between the roof and the side wall, or at the upper end of the side wall. According to this, the inside of the housing can be ventilated more effectively, and the heat generated by the converter can be reliably discharged to the outside.

Further, the roof portion may have a removable structure. According to this, heavy equipment such as high-voltage equipment such as a transformer can be carried from above into the casing with the roof removed.

Further, a busbar may be wired on a ceiling surface or a ceiling surface inside the roof section, and the roof section may be removed together with the busbar. According to this, when the roof portion is removed, the bus bar can be removed at the same time, and subsequent equipment can be safely carried in from above.

Further, the side wall portion may be provided with a waterproof door, and the waterproof door may include a window portion for viewing the meter panel of the converter in a portion above the waterproof portion. According to this, visibility of the meter panel can be ensured while ensuring watertightness in the waterproof portion of the waterproof door.

Further, the water-proof cubicle power receiving equipment is a polyhedral cubicle in which the power distribution board as the conversion device is arranged on one side in each of the plurality of casings, or on one side in each compartment in each casing. Good too. According to this, it is possible to handle large-capacity power reception.

FIG. 1 is a front view of a waterproof cubicle power receiving facility according to an embodiment of the present invention. FIG. 2 is a right side view of the water-proof cubicle power receiving equipment in FIG. 1. FIG. FIG. 2 is a rear view of the water-proof cubicle power receiving equipment shown in FIG. 1. FIG. FIG. 2 is a left side view of the water-proof cubicle power receiving equipment shown in FIG. 1. FIG.

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 respectively show the front, right side, left side, and back side of a waterproof cubicle power receiving equipment according to an embodiment of the present invention. This water-proof cubicle power receiving equipment 1 is a cubicle-type high-voltage power receiving equipment that has excellent protection performance against water damage.

As shown in FIG. 1, the water-proof cubicle power receiving equipment 1 includes a cube-shaped housing 5 that includes a floor 2, a roof 3, and a side wall 4 that covers the side surface between the floor 2 and the roof 3. , a conversion device 8 that is housed inside the housing 5 and converts high voltage power input via the high voltage cable 6 into low voltage power and outputs the low voltage power to the low voltage cable 7.

The converter 8 is a power distribution board that includes a transformer, a capacitor, an ammeter, a voltmeter, a circuit breaker, a power fuse, and the like. A portion of the housing 5 from the floor 2 to a predetermined height of the side wall 4 is a water-tight waterproof portion 9 that prevents water from entering from the outside.

As shown in FIG. 2, an upper outlet 10 for the low-voltage cable 7 from the housing 5 is provided in a portion of the right side wall portion 4 above the water protection portion 9. For example, if the height of the housing 5 is about 2400 mm, about 1500 mm is selected as the predetermined height. On the outer surface of the side wall 4 on the right side, the lower end has a lower outlet 11 for the low voltage cable 7 at the height of the lower end of the side wall 4, and the upper end is connected to the upper outlet 10. A low pressure outlet path 12 is provided.

As shown in FIG. 4, an upper inlet 13 for the high-voltage cable 6 into the housing 5 is provided in a portion of the side wall 4 on the left side above the water-proof portion 9. On the outer surface of the side wall 4 on the left side, a high voltage introduction having a lower inlet 14 for the high voltage cable 6 at the lower end at the height of the lower end of the side wall 4 and an upper end connected to the upper inlet 13 is provided. A passage 15 is provided.

A ventilation fan 16 is provided in a portion of the side wall portion 4 on the left side surface above the waterproof portion 9. The ventilation fan 16 blows air from the inside of the housing 5 to the outside.

A ventilation duct 17 whose lower end is open at the height of the lower end of the side wall 4 and whose upper end is connected to the ventilation fan 16 is provided inside the side wall 4 on the left side. A ventilation hole 18 is provided between the roof part 3 and the side wall part 4 or in the front or rear overhang of the roof part 3. The high pressure inlet path 15, the low pressure outlet path 12, and the ventilation duct 17 are removable, taking into consideration ease of installation.

The roof part 3 is fixed from above with cover bolts or the like, and has a removable structure. Heavy equipment such as a transformer of the converter 8 is carried into the casing 5 with the roof 3 removed. A busbar is wired on the ceiling surface or ceiling surface inside the roof part 3, and the roof part 3 is removed together with the busbar, and a breaking device (CB high-voltage circuit breaker, LBS high-voltage AC Load switches, etc.) are constructed so that they can be easily opened and closed.

As shown in FIG. 3, an inspection port 19 for inspecting the conversion device 8 is provided in the side wall portion 4 on the back side. Since the inspection port 19 is located almost in the water-proof part 9, the water-tightness of the water-proof part 9 is secured by bolts or the like to the side wall part 4 so that the function of the water-proof part 9 is maintained reliably. can be attached to.

As shown in FIG. 1, a waterproof door 20 is provided on the front side wall portion 4 and is used for maintenance. The waterproof door 20 is provided with a window portion 22 above the waterproof portion 9 for viewing the meter panel 21 of the converter 8 and the like. The waterproof door 20 is of a hinge type and has a structure that allows waterproof locking with a waterproof packing after closing.

In this configuration, when installing the waterproof cubicle power receiving equipment 1, the casing 5 is fixed onto the foundation concrete 23 with embedded anchor bolts 24. However, the foundation concrete 23 and the embedded anchor bolts 24 have a strong structure that can withstand the large buoyant force generated on the housing 5 due to high water pressure. Then, the conversion device 8 is installed within the casing 5 fixed in this manner.

When installing the converter 8, heavy equipment such as a transformer is carried in from above the casing 5 with the roof 3 removed. The removed roof portion 3 is fixed to the upper part of the casing 5 with cover bolts or the like.

Further, a high pressure introduction path 15 and a low pressure outflow path 12 are attached to the housing 5. The high voltage cable 6 is introduced into the converter 8 from the ground via the high voltage introduction path 15. The low voltage cable 7 is wired from the conversion device 8 to each external system via the low voltage lead-out path 12. At this time, a terminal block may be provided in the low voltage lead-out path 12, and wiring may be wired from the terminal block to each system. Further, a ventilation fan 16, a ventilation duct 17, a ventilation hole 18, a waterproof door 20, etc. are provided.

If the water level around the water-proof cubicle power receiving equipment 1 rises due to flood damage, etc., if the water level is below the height of the upper end of the water-proof part 9, the flood-proof part 9 will prevent water from entering the enclosure 5. No flooding will occur. Therefore, it is possible to avoid inability to receive power or damage to the converter 8 due to water damage such as river rebellion or levee bursting.

As described above, according to the water-proof cubicle power receiving equipment 1 of the present embodiment, the portion from the floor part 2 of the housing 5 to the predetermined height of the side wall part 4 is the water-proof part 9 that prevents water from entering from the outside. , it is possible to prevent the inability to receive power and damage to the converter due to water damage.

Moreover, since this effect is mainly obtained by setting the water-proof part 9 in the housing, it can be achieved with a cheaper structure than when the parts other than the lower part of the housing 5 are configured in a sealed state. . Furthermore, compared to the case where the housing is configured in a sealed state as described above, it is possible to completely prevent water from entering from the lower part of the housing 5.

In addition, a high voltage introduction path 15 connecting the upper line inlet 13 above the flood protection part 9 of the side wall part 4 and the lower line inlet 14 on the lower side, and the upper line outlet 10 above the water protection part 9 and the lower side Since it is provided with a low voltage lead-out path 12 that connects to a lower wire outlet 11 of The low voltage cable 7 can be led out from the base without any problem.

In addition, since it is provided with a ventilation fan 16 provided in a portion of the side wall portion 4 above the water protection portion 9 and a ventilation duct 17 whose upper end is connected to the ventilation fan 16 and opens downward, the inside of the casing 5 is Ventilation can be performed effectively and the temperature of the heat generating converter 8 can be maintained appropriately.

In addition, since the ventilation hole 18 is provided between the roof part 3 and the side wall part 4 or in the front or rear overhang part of the roof part 3, the inside of the casing 5 is ventilated more effectively, and the converter 8 is The generated heat can be reliably discharged to the outside.

Further, since the roof portion 3 has a removable structure, heavy equipment such as a transformer can be carried into the housing 5 from above with the roof portion 3 removed.

In addition, busbars are wired on the ceiling surface or ceiling surface inside the roof section 3, and the roof section 3 is removed together with the busbars, and the transformer LBS (high-voltage AC load The switch has a hinge on one side and can be turned left and right to open and close. Therefore, the roof portion 3 can be removed together with the bus bar, and heavy equipment such as transformers can be easily carried in and out. .

Further, the side wall portion 4 is provided with a waterproof door 20, and the waterproof door 20 is provided with a window portion in a portion above the waterproof portion 9 for viewing the meter panel of the conversion device, etc., so that the waterproof door 20 is waterproof. While ensuring watertightness in the portion 9, visibility of the meter panel and the like can be ensured.

Note that the present invention is not limited to the above embodiments. For example, the height of the waterproof part 9 may be set higher as the height of the housing 5 is higher. Further, the direction of air blowing by the ventilation fan 16 may be from the outside of the housing 5 to the inside.

Further, the ventilation duct 17, the low pressure outlet path 12, and the high pressure introduction path 15 may be provided on any of the front side, the back side, the right side, and the left side of the side wall portion 4 of the housing 5, respectively. Further, the ventilation hole 18 may be provided at the upper end of the roof section 3 or the side wall section 4.

Further, the water-proof cubicle power receiving equipment may be a polyhedral cubicle including a plurality of switchboards serving as conversion devices. In this case, the switchboard may be provided with a plurality of independent cases, each with one side placed in each case, or one case may be placed with one side in each section divided by a partition wall. It's okay.

This makes it possible to handle a larger capacity of power reception. In this case, the installation positions and the number of installations of the ventilation duct 17, the low-pressure outlet path 12, the high-pressure introduction path 15, and the waterproof door 20 can be appropriately set as necessary.

DESCRIPTION OF SYMBOLS 1... Waterproof cubicle power receiving equipment, 2... Floor, 3... Roof, 4... Side wall, 5... Housing, 6... High voltage cable, 7... Low voltage cable, 8... Conversion device, 9... Waterproof part, 10... Upper outlet, 11...Lower outlet, 12...Low pressure outlet, 13...Upper inlet, 14...Lower inlet, 15...High pressure inlet, 16...Ventilation fan, 17...Ventilation duct, 18...Ventilation hole , 19...Inspection port, 20...Waterproof door, 21...Meter panel, 22...Window part, 23...Foundation concrete, 24...Embedded anchor bolt.

In the present invention , ventilation holes may be provided in the roof, between the roof and the side wall, or at the upper end of the side wall. According to this, the inside of the housing can be ventilated more effectively, and the heat generated by the converter can be reliably discharged to the outside.

Claims (8)

a casing having a floor portion, a roof portion, and a side wall portion that covers a side surface between the floor portion and the roof portion;
a conversion device that is housed inside the housing and converts high voltage power input via a high voltage cable into low voltage power and outputs the same to the low voltage cable;
A water-proof cubicle power receiving equipment characterized in that a portion of the housing from the floor portion to a predetermined height of the side wall portion constitutes a water-tight waterproof portion that prevents water from entering from the outside. An upper inlet for the high-voltage cable and an upper outlet for the low-voltage cable into the housing are provided in a portion of the side wall above the water-proof section;
On the outer surface of the side wall part,
a high voltage introduction path whose lower end has a lower inlet for the high voltage cable at the height of the lower end of the side wall, and whose upper end is connected to the upper inlet;
A claim characterized in that a lower end part has a lower outlet for the low voltage cable at a height of the lower end of the side wall part, and a low voltage lead-out path is provided whose upper end part is connected to the upper outlet. Waterproof cubicle power receiving equipment as described in Section 1. a ventilation fan provided in a portion of the side wall above the flood protection portion; and a ventilation fan provided inside the side wall, a lower end opening at the height of the lower end of the side wall, and an upper end opening for the ventilation fan. 3. The waterproof cubicle power receiving equipment according to claim 1, further comprising a ventilation duct connected to a fan. 4. The water-proof cubicle power receiving equipment according to claim 3, further comprising a ventilation hole in the roof, between the roof and the side wall, or at the upper end of the side wall. 5. The waterproof cubicle power receiving equipment according to claim 4, wherein the roof portion has a removable structure. 6. The water-proof cubicle power receiving equipment according to claim 5, wherein a busbar is wired on a ceiling surface or a ceiling surface inside the roof section, and the roof section is removed together with the busbar. A waterproof door is provided in the side wall,
3. The water-proof cubicle power receiving equipment according to claim 1, wherein the waterproof door includes a window portion above the water-proof portion for viewing a meter panel of the conversion device. 2. The power distribution board as the conversion device is a polyhedral cubicle, one side of which is disposed in each of the plurality of casings, or one side of which is disposed in each compartment within each casing. Waterproof cubicle power receiving equipment.

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