JP7228299B1 - Waterproof cubicle power receiving equipment - Google Patents

Abstract

An object of the present invention is 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 without any trouble even when the water level around the equipment rises. [Solution] A waterproof cubicle power receiving equipment 1 includes a casing 5 having a floor part 2, a roof part 3, and a side wall part 4 covering the side surface between the floor part 2 and the roof part 3, and an interior of the casing 5. The converter 8 is housed in a converter 8 and converts high-voltage power input via a high-voltage cable 6 into low-voltage power and outputs the same to a low-voltage cable 7. A portion of the housing 5 from the floor 2 to a predetermined height of the side wall 4 constitutes a watertight waterproof portion 9 that prevents water from entering from the outside. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to cubicle-type high-voltage power receiving equipment, and relates to water-resistant cubicle power receiving equipment with excellent protection against water damage.

Conventionally, cubicle-type high-voltage power receiving equipment designed to reduce damage caused by floods covers the entire equipment housing with an airtight protective material. There is known a facility that prevents equipment from being submerged in water (see Patent Document 1, for example).

In this equipment, the internal volume of the protective member is the balance between the compression force against the sealed air inside the protective member due to water entering from the bottom of the protective member and the repulsive force of the compressed air when the water level is assumed in advance. Therefore, the water level inside the protective member is determined so as to be limited within the permissible value.

JP 2012-255322 A

However, according to the equipment of Patent Document 1, the rise of the water level entering from the lower end of the protective member is restricted by the pressure of the sealed air inside the protective member. Inundation up to a certain water level at the bottom of the

In addition, since the pressure of the sealed air when the protective member keeps the inside of the device airtight increases rapidly according to the height of the water level around the device, the airtightness of the device should be sufficiently withstood up to a certain water level. In order to be able to maintain this, installation of a housing covered with a protective member requires a considerable cost. Furthermore, since the entire housing of the facility is covered with an airtight protective member, it is difficult to properly ventilate the housing.

It is an object of the present invention to provide a water-resistant cubicle power receiving facility that can prevent water from entering the facility as much as possible with a relatively inexpensive configuration without any problems even when the water level around the facility rises. It is in.

The waterproof cubicle power receiving equipment of the present invention is
a housing comprising a floor, a roof, and side walls covering sides 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 power to the low-voltage cable;
A portion from the floor portion of the housing to a predetermined height of the side wall portion constitutes a watertight portion that prevents water from entering from the outside.

According to the present invention, even if the water level around the water protection type cubicle power receiving equipment rises, as long as the water level does not exceed the top of the water protection part, it is possible to prevent water from entering the equipment. or damage to the conversion device.

Moreover, since this effect is mainly obtained by setting the waterproof part in the housing, it can be achieved with a less expensive structure than in the case where the housing is sealed except for the lower part. Moreover, it is possible to completely prevent water from entering from the lower part of the housing, as compared with the case where the housing is sealed in this way.

In the present invention, a portion of the side wall portion above the waterproof portion is provided with an upper wire entry port for the high-voltage cable and an upper wire outlet port for the low-voltage cable into the housing,
On the outer surface of the side wall,
a high-voltage lead-in 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 having a lower end having a lower outlet for the low voltage cable at the height of the lower end of the side wall and having an upper end connected to the upper outlet may be provided.

In the present invention, a high-voltage cable is introduced from an external high-voltage power source into the converter of the waterproof cubicle power receiving equipment through the lower inlet and the upper inlet of the high-voltage lead-in path. On the other hand, the low-voltage cable is led out from the conversion device through the upper outlet port and the lower outlet port of the low-voltage lead-out path, and wired to necessary facilities outside. High-voltage power input from an external high-voltage power supply to the conversion device through the high-voltage cable is converted into low-voltage power by the conversion device, output to the low-voltage cable, and supplied to external facilities.

Therefore, in spite of the existence of the waterproof part, it is possible to introduce the high-voltage cable into the conversion device in the housing and lead out the low-voltage cable from the conversion device without any trouble.

In the present invention, a ventilation fan is provided in a portion of the side wall above the waterproof portion; and a ventilation duct connected to said ventilation fan. According to this, during normal operation without flood damage, etc., the heat generated by the converter can be appropriately discharged to the outside through the ventilation duct by the ventilation fan, and the temperature of the converter can be appropriately maintained.

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

Moreover, 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 housing from which the roof is removed.

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

A waterproof door may be provided on the side wall, and the waterproof door may include a window for viewing a meter panel of the converter in a portion above the waterproof part. According to this, it is possible to ensure the visibility of the meter panel while ensuring the watertightness of the waterproof portion of the waterproof door.

In addition, the waterproof cubicle power receiving equipment is a polyhedral cubicle in which a switchboard as the conversion device is arranged one by one in each of the plurality of housings, or one by one in each section in each housing. good too. According to this, it is possible to cope with large-capacity power reception.

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

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 of a waterproof cubicle power receiving facility according to one embodiment of the present invention. This water-resistant cubicle power receiving equipment 1 is a cubicle-type high-voltage power receiving equipment with excellent protection performance against water damage.

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

The conversion device 8 is a switchboard configured with transformers, capacitors, ammeters, voltmeters, circuit breakers, power fuses, and the like. A portion from the floor portion 2 of the housing 5 to a predetermined height of the side wall portion 4 serves as a waterproof portion 9 having watertightness to prevent water from entering from the outside.

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

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

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

Inside the side wall 4 on the left side, a ventilation duct 17 is provided whose lower end opens at the height of the lower end of the side wall 4 and whose upper end is connected to a ventilation fan 16 . Ventilation holes 18 are provided between the roof portion 3 and the side wall portion 4 or in the overhanging portion on the front side or the rear side of the roof portion 3 . The high pressure lead-in path 15, the low pressure lead-out path 12, and the ventilation duct 17 are detachable, and ease of installation is considered.

The roof part 3 is fixed with cover bolts or the like from above, and has a detachable structure. Heavy equipment such as a transformer of the converter 8 is carried into the housing 5 with the roof 3 removed. A busbar is wired on the inner ceiling surface or the ceiling back surface of the roof part 3, and the removal of the roof part 3 is performed together with the busbar. load switches, etc.) are configured to be easily opened and closed.

As shown in FIG. 3 , an inspection opening 19 for inspecting the conversion device 8 is provided in the rear side wall portion 4 . Since the inspection port 19 exists almost in the portion of the waterproof section 9, the watertightness of the waterproof section 9 is secured by bolts or the like to the side wall section 4 so that the function of the waterproof section 9 is reliably maintained. can be attached to

As shown in FIG. 1, the side wall portion 4 on the front side is provided with a waterproof door 20 on the front side, which is used for maintenance. The waterproof door 20 is provided with a window portion 22 for viewing the meter panel 21 and the like of the conversion device 8 above the waterproof portion 9 . As the watertight door 20, a hinged door having a structure that can be watertight-locked with a watertight packing after closing is adopted.

In this configuration, when installing the waterproof cubicle power receiving equipment 1 , the housing 5 is fixed on the foundation concrete 23 with embedded anchor bolts 24 . However, the foundation concrete 23 and the embedded anchor bolts 24 have a strong structure capable of withstanding the large buoyancy generated in the housing 5 due to high water pressure. Then, the conversion device 8 is installed inside the housing 5 fixed in this way.

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

Also, a high-pressure lead-in path 15 and a low-pressure lead-out path 12 are attached to the housing 5 . A high voltage cable 6 is introduced from the ground into the conversion device 8 via a 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 made from the terminal block to each system. A ventilation fan 16, a ventilation duct 17, a ventilation hole 18, a waterproof door 20, and the like are also provided.

When the water level around the flood-proof cubicle power receiving equipment 1 rises due to flooding or the like, if the water level is below the height of the top of the flood-proof part 9, the flood-proof part 9 prevents flooding. No flooding occurs. For this reason, it is possible to avoid the inability to receive power and the damage to the conversion device 8 due to flood damage such as river rebellion and embankment collapse.

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

In addition, since this effect is mainly obtained by setting the waterproof part 9 in the housing, it can be achieved with an inexpensive structure compared to the case where the parts other than the lower part of the housing 5 are configured in a sealed state. . Moreover, intrusion of water from the lower part of the housing 5 can be completely prevented as compared with the case where the housing 5 is configured in a sealed state.

In addition, a high-pressure introduction path 15 connecting an upper wire inlet 13 above the waterproof portion 9 of the side wall portion 4 and a lower wire inlet 14 below the waterproof portion 9, an upper wire outlet 10 above the waterproof portion 9, and a lower side Since it has a low-voltage lead-out path 12 that connects the lower outlet port 11 of the high-voltage cable 6 to the conversion device 8 in the housing 5 and the conversion device 8 The low-voltage cable 7 can be led out from the cable without any trouble.

In addition, since a ventilation fan 16 is provided in a portion of the side wall portion 4 above the waterproof portion 9 and a ventilation duct 17 whose upper end portion is connected to the ventilation fan 16 and opens downward, the inside of the housing 5 can be Ventilation can be effectively performed, and the temperature of the heat-generating conversion device 8 can be appropriately maintained.

In addition, since the ventilation holes 18 are provided between the roof portion 3 and the side wall portion 4 or in the front or rear overhanging portion of the roof portion 3, the inside of the housing 5 is more effectively ventilated, and the conversion device 8 is The generated heat can be reliably discharged to the outside.

In addition, since the roof part 3 has a detachable structure, heavy equipment such as a transformer can be carried from above into the housing 5 with the roof part 3 removed.

In addition, a busbar is wired on the ceiling surface or the back surface of the ceiling inside the roof part 3, and the removal of the roof part 3 is performed together with the busbar. A switch) has a hinge on one side and is configured to be turned left and right to open and close. Therefore, the roof part 3 can be removed together with the bus bar, and the carrying in and out of heavy equipment such as a transformer can be easily carried 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. It is possible to ensure the visibility of the meter panel and the like while ensuring the watertightness of the portion 9 .

In addition, this invention is not limited to the said embodiment. For example, the height of the waterproof part 9 may be set higher as the height of the housing 5 is higher. Also, the direction of air blown by the ventilation fan 16 may be the direction from the outside of the housing 5 toward the inside.

Further, the ventilation duct 17, the low-pressure lead-out path 12, and the high-pressure lead-in path 15 may be provided on the front side, back side, right side, or left side of the side wall portion 4 of the housing 5, respectively. Also, the ventilation holes 18 may be provided in the roof portion 3 or the upper end portion of the side wall portion 4 .

Moreover, the waterproof cubicle power receiving equipment may be a polyhedral cubicle having a plurality of switchboards as conversion devices. In this case, the switchboard may be provided with a plurality of independently-supported enclosures, and one panel may be arranged in each enclosure. may

As a result, it is possible to cope with receiving a larger amount of power. In this case, the installation positions and the installation numbers of the ventilation duct 17, the low-pressure lead-out path 12, the high-pressure lead-in path 15, and the waterproof door 20 can be appropriately set as necessary.

DESCRIPTION OF SYMBOLS 1... Waterproof cubicle power receiving equipment, 2... Floor part, 3... Roof part, 4... Side wall part, 5... Case, 6... High-voltage cable, 7... Low-voltage cable, 8... Conversion device, 9... Waterproof part, 10... Upper wire outlet, 11 Lower wire outlet, 12 Low-pressure outlet, 13 Upper wire inlet, 14 Lower inlet, 15 High-pressure lead-in, 16 Ventilation fan, 17 Ventilation duct, 18 Ventilation hole , 19... inspection port, 20... waterproof door, 21... meter panel, 22... window, 23... foundation concrete, 24... embedded anchor bolt.

Claims (8)

a housing having a floor, a roof, and side walls covering sides 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 power to the low-voltage cable;
A portion of the housing from the floor to a predetermined height of the side wall constitutes a waterproof portion having watertightness to prevent water from entering from the outside,
An upper wire entry port for the high-voltage cable and an upper wire outlet for the low-voltage cable are provided in the side wall portion above the waterproof portion,
On the outer surface of the side wall,
a high-voltage lead-in 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 having a lower end portion having a lower outlet port for the low-voltage cable at the height of the lower end portion of the side wall portion, and a low-voltage lead-out path having an upper end portion connected to the upper outlet port ; type cubicle power receiving equipment. a housing having a floor, a roof, and side walls covering sides 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 power to the low-voltage cable;
A portion of the housing from the floor to a predetermined height of the side wall constitutes a waterproof cubicle power receiving equipment having watertightness to prevent water from entering from the outside,
a ventilation fan provided in a portion of the side wall above the waterproof portion; a ventilation fan provided inside the side wall; and a ventilation duct connected to a fan. a ventilation fan provided in a portion of the side wall above the waterproof portion; a ventilation fan provided inside the side wall; 2. The waterproof cubicle power receiving equipment of claim 1, further comprising a ventilation duct connected to a fan. The waterproof cubicle power receiving equipment according to any one of claims 1 to 3, wherein a ventilation hole is provided in the roof, between the roof and the side wall, or in the upper end of the side wall. The waterproof cubicle power receiving equipment according to any one of claims 1 to 3, characterized in that said roof part has a removable structure. 6. The floodproof cubicle power receiving equipment according to claim 5, wherein a busbar is wired on the ceiling surface or the ceiling back surface inside the roof part, and the roof part is removed together with the busbar. A waterproof door is provided on the side wall,
The watertight door according to any one of claims 1 to 3, wherein the watertight door is provided with a window portion for viewing a meter panel of the conversion device in a portion above the watertight portion. Cubicle power receiving equipment. 3. A power distribution board as said conversion device is a polyhedral cubicle arranged one side in each of said plurality of housings, or one side arranged in each section in each housing. The waterproof cubicle power receiving equipment according to any one of the above .

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