KR101125007B1 - Underground power line for ground power facilities using underground drainage and ventilation system - Google Patents

Abstract

PURPOSE: An underground power line for ground power facilities using underground drainage and ventilation system are provided to discharge heat and toxic gas by forming an upper lid into a waterproof structure and connecting it to a collection container through an outlet and a ventilation duct. CONSTITUTION: A cable manhole(10) is connected to a circulating air duct(55) connected to a bottom drainpipe(52). Opening/closing boxes(20, 30) has a waterproof structure of an upper case. A grating platform(50) is separated from the inner bottom of the opening/closing boxes in upward. A reservoir water space(51) is connected through a drainpipe. The drainpipe(52) is connected to drainage and a ventilation water collection well(53).

Description

Underground power line for ground power facilities using underground drainage and ventilation system

The present invention relates to a underground distribution line construction method in which all the facilities for constructing underground distribution lines are buried underground by installing transformers and switches of underground distribution lines. More specifically, cable manholes in underground distribution lines Including a transformer and switchgear, which had to be conventionally installed on the ground, using a drainage and ventilation system in a unique underground manhole, the manhole is a solution to the problems of flooding and heat generation due to undergrounding.

In general, wires such as various electric lines or communication lines have been commonly installed in the air using electric poles. However, in recent years, due to the problem of harming the aesthetics of the city due to the electric poles of the electric poles and the air as described above, it is a tendency to replace or construct a new construction of underground distribution line.

In general, the existing underground distribution line construction method can be largely divided into direct sales type, pipeline type, and old-fashioned type. The direct sales type and pipeline type differ according to the use of conduits, but the construction type is similar.

In both of these methods, as shown in FIG. 1, the manhole 100 used at a cable or cable line, an intermediate connection point or a point where a line is bent is buried underground, and a transformer (T / R) 110 and a switch (S / W). 120 is installed on the ground and the cable is drawn out to the ground only at the point where the equipment is installed and connected to the equipment.

However, in constructing the underground distribution line as described above, the direct sales type and the pipeline type have a problem contrary to the purpose of the original underground distribution line due to the equipment for installing the transformer and the switch on the ground.

In other words, similar to the problems with the support for overhead distribution lines, space problems in construction (difficult to install due to civil complaints in the vicinity of private lands), aesthetics (such as painting, graffiti, or advertisements attached to the equipment enclosure installed on the ground). As a countermeasure, the color of the enclosure is applied, but the appearance changes violently with time, and it is mostly used as a place to collect garbage, which can be seen as a huge trash can. There are many problems such as danger of pedestrians due to heat or explosion, risk of electric shock in rainy weather, danger of worker choking when working in manhole due to lack of oxygen and harmful gas inside manhole, and collision risk (collision with vehicle or pedestrian). will be.

In spite of various problems as mentioned above, due to the current construction method or the characteristics of the device, such a device (transformer, switchgear) cannot be buried underground. Should also be considered).

As a result, a method of slimming down or downsizing the device is also considered.The device may be installed in an outer area, on the building's interior and rooftop (requires an owner's lease approval), or a separate device assembly called a power distribution station may be required. As the budget has to be additionally invested and the loop of the track is bypassed, the construction is difficult and lengthy, and the maintenance of facilities is difficult. Therefore, the fundamental problem cannot be solved.

The present invention improves the problems as described above, in the configuration of the underground distribution line consisting of a plurality of cable connection manhole and ground switch box and ground transformer box, the switch box and transformer box including the cable connection manhole drainage and The underground cover of the ventilation system manhole is buried, and the upper cover of the switchgear box and the transformer box has a waterproof structure to prevent rainwater from penetrating, and the installation part using grating is formed inside, and these drainage and ventilation system manholes have a drain pipe and a ventilation duct. By connecting to separate sewage wells, by forming the drainage pump and suction exhaust fan to discharge the leachate and rainwater recovered and to discharge the hot air and harmful gases, respectively,

Ground switchgears and transformers are installed underground to reasonably overcome various problems in the prior art, and underground manhole drainage and ventilation systems with characteristics of leachate, rainwater and high heat caused by underground installation are also eliminated through drain pipes and ventilation ducts. It is an object of the present invention to provide an underground buried underground distribution line for the ground underground power distribution facilities.

The present invention for achieving the above object, in the underground distribution line consisting of a cable manhole, switchgear box and transformer box, the cable manhole, switchgear box and transformer box all underground buried in the form of a single drainage and ventilation system manhole The switch box and the transformer box are connected to each other through the underground cable via the cable manhole, the cable manhole has a bottom structure connected to the lower drain pipe and connected to the ventilation duct, the switch box and the transformer box has a top cover It is composed of a waterproof structure that rainwater does not invade, and the inside is formed with a grating installation spaced apart from the inner bottom, respectively, so that the bottom storage space by these grating installations are formed,

These switchgear boxes and transformer boxes are connected to each other with separate drainage and ventilation function sump through a drain pipe and a ventilation duct, and a check valve for preventing backflow to the drainage pipe is installed inside the sump, and a drain pump and a suction exhaust fan. The leachate introduced into the switchgear and the transformer box and hot and hot heat are recovered and discharged to the drainage and ventilation function sump along the drain pipe and the ventilation duct.

The present invention, by applying the heat dissipation means by the drainage means and the ventilator box and the transformer box can be installed in the underground in the form of manholes to improve the various problems caused by the switchgear box and the transformer box protruded to the ground as In addition, the reclamation construction of all facilities can solve the problems of existing ground space occupancy, aversion to urban aesthetics and self-damage, and promote safety without collision with vehicles or pedestrians. Underground installations of transformers and transformer boxes provide the effect of efficient use of the ground space they occupy.

1 is a schematic overall configuration diagram of a typical underground distribution line
Figure 2 is a schematic overall configuration of the underground distribution line according to the present invention
Figure 3 is a side cross-sectional view of the drainage and ventilation system manhole in the underground distribution line according to the present invention
Figure 4 is another embodiment of the drainage and ventilation system manhole in the underground distribution line according to the present invention

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is an overall schematic configuration diagram of an underground distribution line according to the present invention, Figure 3 is a side cross-sectional view of the drainage and ventilation system manhole in the underground distribution line according to the present invention.

Referring to the schematic configuration of a conventional underground distribution line, cable manholes for branching and connection to various cables are buried underground in the form of manholes, and switchgear boxes equipped with switchgear or transformer for switching and transforming these cables Transformer boxes are usually installed on the ground.

However, in the present invention, the switchgear box 20 and the transformer box 30 are also made to be embedded in the manhole at the same time with the cable manhole 10.

Accordingly, the plurality of cable manholes 10, the switch box 20, and the transformer box 30 are all underground, and the underground cable 40 passing through the cable manhole 10 is the switch box 20. The switch 21 and the transformer box 30 in the interior will have a state connected to each other.

At this time, the cable manhole 10 has a bottom structure connected to the lower drain pipe 52 and is connected to the ventilation duct 55, the interior of the switchgear box 20 and the transformer box 30 is spaced upwardly from the bottom The grating mounting unit 50 is formed, and the grating mounting unit 50 serves as an installation bottom surface for the switchgear 21 and the transformer 31 located inside the switchgear 20 and the transformer box 30. At the same time it is to produce a good drainage action due to the special shape of the grating itself (lattice-shaped panel), it is to serve to create a storage space 51 in the form of an empty space at the bottom.

In addition, the storage space 51 generated by the grating mounting table 50 of the switch box 20 and the transformer box 30 as described above is equipped with a drain pipe 52 for connecting the storage space 51 to each other One end of the drain pipe 52 is connected to the separately embedded drain and ventilation function sump 53, so that the cable manhole 10, the switch box 20, the transformer box 30, and the drain and Ventilating function sump 53 is to maintain the state in communication with each other by the vent pipe and the drain pipe (52).

When rainwater flows into the interior of the switchgear box 20 and the transformer box 30 in this state, the leachate and rainwater are collected in the lower reservoir 51 through the grating mounting unit 50, and the storage space The leachate and rainwater of 51 are discharged and discharged toward the drainage and ventilation function sump 53 through the drain pipe 52.

At this time, a check valve 57 is installed in the drain pipe 52 connected to the sump 53 to prevent a backflow from the sump 53 to the drain pipe 52 side, and the sump 53 is disposed in all the drains. And so as to be buried in a lower position than the ventilation system manhole so that the leachate and rainwater introduced into the inside of the gable manhole 10 and the switchgear box 20 and the transformer box 30 flows naturally into the sump (53). In consideration of the geography and geographic situation of the construction site, it consists of blocks up to one sump that is connected to the drainage and ventilation system manhole, and the size of the block (the size of the sump and the number of drainage and ventilation system manholes connected) It would be advisable to adjust them in consideration of facility operation management and topography.

In particular, the rainwater introduced into the sump 53 may have a form of natural drainage by underground absorption or drainage to a sewer pipe, and at the same time, it may be forced to drain by using a separate pump. In addition, in the case of forced drainage using a pump, the suction exhaust fan 54 and the drain pump 56 are arranged in double or triple with respect to one drainage and ventilation function sump 53 and one suction exhaust fan 54. And even if the abnormality or inoperable state of the drain pump 56, it is desirable to be able to prevent the operation stop and power failure due to the inundation as the extra fan and pump or auxiliary pump to perform its function. If a separate water level sensor is installed in the drainage and ventilation function sump 53 to allow the drain pump 56 to operate automatically due to the water level sensing force by these water level sensors, the drainage and ventilation function sump 53 Excessive leachate and rainwater may be prevented from flowing back to the drain pipe 52 side. In particular, in the case of the drainage pump 56 as described above, it would be more ideal to realize an unmanned automation system as the system is constructed to automatically adjust the drainage amount according to the water flow into the sump 53.

Moreover, the switchgear 21 and the transformer 31 installed in the switchgear box 20 and the transformer box 30 emit relatively high temperature heat, and the heat dissipation effect on the heat is not smoothly performed. Failure to do so may degrade the performance of the equipment, and may also create a serious environment that threatens workers entering the manhole by creating an internal environment in which harmful gases are accumulated or lack of oxygen inside these manholes, including cable manholes. In order to prevent this because it may cause a safety accident vent duct 55 connecting the cable manhole 10 and the switchgear box 20 and the transformer box 30 and the sump (53) as shown in FIG. It is configured, and a separate suction exhaust fan 54 is formed on the end of the ventilation duct 55 exposed to the sump 53.

At this time, the suction exhaust fan 54 sucks air in the ventilation duct 55 connecting the cable manhole 10, the switch box 20, and the transformer box 30, and discharges them into the sump 53. When the pressure in the ventilation duct 55 is lowered due to the operation of the suction exhaust fan 54, it naturally sucks the air inside the cable manhole 10, the switchgear box 20, and the transformer box 30. The hot and harmful gas generated in the drainage and ventilation system manhole will eventually be discharged to the inside of the ventilation catch basin 53 through the ventilation duct 55, and to the ventilation catch basin 53. As the high temperature heat is discharged to the ground, the interior of the switchgear box 20 and the transformer box 30 is continuously introduced to the room temperature air from the outside due to the pressure difference, the cable connection and the switch 21 and the transformer ( For 31) And it can be made to each action to become the inside of the manhole air is always maintained at a comfortable state.

In particular, the ventilation duct 55 is installed so as to be located above the electrical grating mounting unit 50, the high temperature heat generated from the switch 21 or the transformer 31 located on the grating mounting unit 50 It may be desirable to be able to be directly discharged quickly, which is because the leachate and rainwater in the reservoir 51 located in the lower portion of the grating mounting 50 is introduced into the ventilation duct 55 and the air flow or ventilation and circulation and It also aims to prevent the heat dissipation from being reduced.

Therefore, since the underground buried underground distribution line of the present invention does not have any protruding ground installations, it will reasonably overcome the problems of the existing underground distribution line, and at the same time, it is possible to effectively utilize the ground space.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as defined by the appended claims. Examples should be understood.

10: cable manhole
20: switchgear 21: switchgear
30: transformer box 31: transformer
40: underground cable
50: grating mounting 51: water storage
52: drain pipe 53: drainage and ventilation function collection
54: suction fan 55: ventilation duct
56 drain pump 57 check valve

Claims (7)

In the underground distribution line consisting of the cable manhole 10, the switch box 20 and the transformer box 30,
The cable manhole 10, the switch box 20 and the transformer box 30 are buried underground in the form of a drainage and ventilation system manhole, and the switch box 20 and the transformer box 30 connect the cable manhole 10. The cable manhole 10 is connected to each other through the underground cable 40 passing through, and the cable manhole 10 has a bottom structure connected to the lower drain pipe 52 and connected to the ventilation duct 55, and the switch box 20 and the transformer. The box 30 is formed of a waterproof structure that rainwater does not penetrate the upper cover, the inside is formed with a grating mounting unit 50 spaced apart from the inner bottom portion, respectively, by the water storage space of the lower side by the grating mounting unit ( 51),
These switchgear box 20 and the storage space 51 of the transformer box 30 is connected to each other through a separate drain pipe 52 and the drain pipe 52 is connected to a separate drain and ventilation function sump 53 The leachate and rainwater flowing into the switchgear box 20 and the transformer box 30 are collected and discharged from the reservoir space 51 to the drainage and ventilation function sump 53 along the drain pipe 52. The air inside the cable manhole 10, the switch box 20 and the transformer box 30 is discharged to the outside through the vent duct 55 is connected to the drainage and ventilation function sump 53 separately Underground underground distribution line for ground power distribution system by manhole drainage and ventilation system. The method of claim 1,
Drainage and ventilation function Underground manhole drainage and ventilation, characterized in that the inside is equipped with a suction exhaust fan 54 and the drain pump 56 for forcibly draining the leachate and rainwater collected to the outside Underground underground distribution line for ground power distribution system by system.
The method of claim 2,
The suction exhaust fan 54 and the drain pump 56 are installed in a plurality of at least two units and configured to automatically operate the other suction exhaust fan and the drain pump in the event of an abnormality or failure of the set basic suction exhaust fan and the drain pump. An underground buried underground distribution line for underground underground power distribution facilities by underground manhole drainage and ventilation systems.
The method of claim 1,
The drainage and ventilation function sump 53 is buried in a lower position than the cable manhole 10 and the switchgear box 20 and the transformer box 30 so that the cable manhole 10 and the switch box 20 and the transformer box An underground buried underground distribution line for the ground underground power distribution system by underground manhole drainage and ventilation system, characterized in that the leachate and rainwater introduced into the 30 to be naturally discharged to the drainage and ventilation function sump (53).

The method of claim 1,
The cable manhole 10 and the switch box 20 and the transformer box 30 are connected to the drainage and ventilation function sump 53 by separate drain pipes 52, but are directly connected to the sump 53. ) Is installed on the ground underground power distribution system by the underground manhole drainage and ventilation system, characterized in that the check valve (57) is installed to prevent the leachate and rainwater collected in the sump (53) to flow back to the drain pipe (52) side. Underground underground distribution line.
The method of claim 1,
Considering the underground facility operation management and the geography and geographic situation of the construction site, determine the appropriate block size (size of the sump and the number of drainage and ventilation system manholes connected) to the single sump connected to the drainage and ventilation system manholes. Underground underground distribution line for underground power distribution facilities by underground manhole drainage and ventilation system.
The method of claim 1,
The cable manhole 10, the switch box 20, the transformer box 30 and the sump 53 are to be connected to each other by a separate vent duct 55 formed on the upper side of the grating mounting table 50, 53) The suction duct 55 is formed in the ventilation duct 55 exposed to the inside, and the cable manhole 10 and the switch box 20 are formed along the ventilation duct 55 through the operation of the suction fan 54. Underground underground distribution line for the ground underground power distribution facility by underground manhole drainage and ventilation system, characterized in that the internal air of the transformer box 30 is configured to be discharged to the outside through the drainage and ventilation function sump 53. in.

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