KR102423453B1 - Underground cable grounding device and a method for grounding cable using thereof - Google Patents

Abstract

The present invention relates to an underground grounding device capable of reinforcing the grounding with minimal excavation for a structure buried in the ground, and a grounding method using the grounding device. A first grounding copper rod having a screw thread formed on the outer circumferential surface to drill the outer wall of the And, the underground structure can be directly drilled or inserted into the ground through the first grounding rod, thereby reducing the amount of excavation of the grounding work and providing convenience to the work.

Description

UNDERGROUND CABLE GROUNDING DEVICE AND A METHOD FOR GROUNDING CABLE USING THEREOF

The present invention relates to an underground grounding device and an underground grounding method using the underground grounding device, and more particularly, to an underground grounding device capable of reinforcing the grounding with minimal excavation for a structure buried in the ground, and an underground grounding device using the underground grounding device It is about the grounding method.

In general, low-voltage junction boxes or underground structures are widely used to connect or branch low-voltage cables of underground distribution lines underground. The conventional underground structure is used to prevent an electric shock accident due to a short circuit in an underground distribution line by connecting a grounding plate installed inside and a grounding rod buried in the ground to each other.

In Korea Patent No. 10-0067075 (hereinafter referred to as 'Prior Art 1'), a grounding device is used to drain the current leaked from the iron lid of the low-voltage junction box used as the inlet junction of the underground power supply area to the earth. Disclosed is a low-voltage junction box for an underground line for preventing an electric shock accident of personnel due to a short circuit electric shock by connecting to the ground.

In addition, Korean Patent Registration No. 10-1544104 (hereinafter referred to as 'Prior Art 2') has a method to prevent the penetration of fluid foreign substances such as rainwater into the low-pressure junction box through the part connecting the grounding plate and the grounding rod. A grounding device for an underground distribution low voltage junction box is disclosed.

However, in the prior art 1 and 2, the road or sidewalk is excessively excavated using the construction method of burying the surrounding area of the underground structure for the burial of the grounding rod and then connecting it in parallel to the grounding rod and then backfilling, the cost of restoration of the pavement And there was a problem that the excavation cost was high.

In addition, there was a problem in that it was necessary to control the entry of vehicles or people on the road or sidewalk for excavation work and to obtain prior permission.

The present invention was created to improve the problems of the conventional construction method of underground structures as described above, and has an object to provide convenience to the grounding reinforcement work of underground structures and to improve the gripping force.

In order to achieve the object as described above, an underground grounding device according to the present invention includes a grounding unit for grounding an underground structure; and a ground connection unit connected to the ground unit. Including, wherein the ground portion, a first ground copper rod having a screw thread formed on the outer circumferential surface so as to perforate the outer wall of the underground structure; may include

The grounding unit, a second grounding rod for grounding the underground structure; The grounding device further comprising, wherein the grounding connection part connects the first grounding rod and the second grounding rod.

The ground connection unit may include: a lead wire having one end connected to the first ground copper rod and the other end connected to the second ground copper rod; may include

The lead wire may be formed of a conductor through which a current between the first grounding rod and the second grounding rod can pass.

The ground connection unit may include: a perforated cover for preventing fluid from flowing into a perforation formed in the outer wall of the underground structure by the first grounding rod; may include.

The perforated cover may have a longer diameter than the diameter of the first ground copper rod.

The perforated cover may be disposed on the inner surface of the underground structure.

The perforated cover, an adhesive may be applied to one surface facing the inner surface of the underground structure.

The ground connection unit may include: an adapter formed in a cylindrical shape to fill a hole formed in the outer wall of the underground structure by the first ground rod; may include.

The adapter may have a screw thread formed on its inner circumferential surface so as to be bolted to the first grounding rod.

The ground connection part, a perforated cover for preventing fluid from flowing into the perforation formed in the inner wall of the underground structure by the first grounding rod; Further comprising, the perforated cover may be arranged to be in close contact with one side facing the inner space of the underground structure of the adapter.

The ground connection part is disposed in the perforation of the underground structure, the lead wire is through the inside of the connecting rod; may further include.

The connecting rod may be disposed in a perforation adjacent to the second grounding rod among the perforations of the underground structure.

The first grounding enclosure includes: an enclosure cover detachable from one end thereof; may include.

The enclosure cover, in order to improve the penetrating force, one side may be formed in a pointed cone shape.

The enclosure cover may be formed of a high-strength material in consideration of friction with the outer wall and soil of the underground structure.

In order to prevent the lead wire from being cut off, at least two or more conductive wires may be connected in parallel.

The ground grounding method according to the present invention includes a drilling preparation step of connecting a first grounding copper rod having a screw thread formed thereon to a perforator; A side wall perforating step of rotating the first ground rod by operating a perforator and perforating the side wall of the underground structure; and a lead wire connection step of connecting the first ground copper rod and the second ground copper rod with a lead wire when the first ground copper rod is buried in the soil after the end of the side wall drilling step; may include.

The side wall drilling step may include: a first drilling step of drilling one side wall of the underground structure; And a second drilling step of drilling the other side wall of the underground structure; may include.

The lead wire connecting step may include: a connecting rod inserting step of inserting the lead wire into the connecting rod and passing; may include.

a grounding test step of checking a grounding value whether a grounding function can be smoothly performed after the lead wire connection step is completed; and a grounding reducing agent application step of applying a grounding reducer to the first grounding enclosure when the grounding value measured in the grounding test step is lower than the reference; may further include.

As described above, the earth grounding device according to the present invention perforates the wall surface of the underground structure using a perforator, and then includes a grounding rod having a thread formed on the outer circumferential surface so as to directly drill into the geology, thereby reducing the amount of excavation of the underground grounding operation. It has the effect of reducing and providing convenience to the work.

In addition, it is composed of a first grounding rod and a second grounding rod and a lead wire connecting both, so that there is an effect of stably grounding the underground structure.

Furthermore, it is possible to prevent foreign substances such as rainwater from penetrating into the underground structure by providing a perforated cover, an adapter, and a connecting rod.

1 is a view for explaining the external appearance of the earth grounding device according to an embodiment of the present invention.
Figure 2 is a perspective view for explaining the external appearance of the first grounding rod according to an embodiment of the present invention.
3 is a perspective view illustrating a structure in which a perforated cover and an adapter are coupled to the first grounding rod according to an embodiment of the present invention.
4 is a view for explaining an adapter according to an embodiment of the present invention.
5 and 6 are flowcharts for explaining an underground grounding method using an underground grounding apparatus according to an embodiment of the present invention.

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

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and will be described in detail in the detailed description. This is not intended to limit the present invention to a specific embodiment, it should be construed to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

The term “and/or” includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but other components may exist in between. can be understood On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it may be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and one or more other features It may be understood that the existence or addition of numbers, steps, operations, components, parts or combinations thereof is not precluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries may be interpreted as having meanings consistent with the meanings in the context of the related art, and unless explicitly defined in the present application, they are interpreted in an ideal or excessively formal meaning. it may not be

In addition, the following embodiments are provided to more completely explain to those with average knowledge in the art, and the shapes and sizes of elements in the drawings may be exaggerated for clearer explanation.

Hereinafter, an underground grounding device 1 according to the present invention will be described with reference to FIGS. 1 to 4 .

Referring to FIG. 1 , an underground grounding device 1 according to the present invention includes a grounding part 100 and a grounding connecting part 200 .

The grounding unit 100 performs a function of grounding the underground structure and may include a first grounding rod 110 and a second grounding rod 120 .

The first ground copper rod 110 may have a screw thread formed on the outer circumferential surface so as to be directly drawn into the ground or to perforate the outer wall of the underground structure. (See FIG. 2 ) The first grounding copper rod 110 may be formed of a conductor such as metal to ground the underground structure. After the worker perforates the outer wall of the underground structure using a perforator, the first grounding rod 110 may be drawn into the ground. In addition, when the material of the first grounding rod 110 is selected as a material having sufficient hardness to perforate the outer wall of the underground structure (typically designed with concrete), the outer wall of the underground structure may be directly perforated.

The second ground copper rod 120 is formed of a conductor such as metal and performs a function of grounding the underground structure. The second ground copper rod 120 may have a screw thread formed on its outer circumferential surface in order to enhance the convenience of being drawn into the ground.

The ground connection unit 200 performs a function of connecting the first grounding rod 110 to the second grounding rod 120 . Referring to FIG. 1 , the ground connection unit 200 may include a lead wire 210 , a perforated cover 220 , an adapter 230 , and a connecting rod 240 .

The lead wire 210 may be disposed such that one side is connected to the first ground copper rod 110 and the other side is connected to the second ground copper rod 120 . The lead wire 210 may be formed of a conductor through which a current can pass so that the current inside the underground structure can be grounded to either the first grounding rod 110 or the second grounding rod 120 .

In order to prevent the occurrence of a problem in that the lead wire 210 is disconnected in the internal environment or during operation and the underground structure is not grounded, at least two or more conductive wires may be connected in parallel.

The perforated cover 220 is a perforation formed on the outer wall of the underground structure to prevent the inflow of fluids or foreign substances such as rainwater. The perforated cover 220 may be formed to have a longer diameter than the diameter of the first ground copper rod 110 . The diameter of the perforation formed on the outer wall of the underground structure by the perforator or the first ground copper rod 110 may be formed to correspond to the diameter of the first ground copper rod 110 . In order to prevent the inflow of fluid or foreign substances such as rainwater into the perforation, the perforated cover 220 is preferably formed to have a longer diameter than the diameter of the first ground copper rod 110 .

Referring to Figure 1, the perforated cover 220 may be disposed on the inner surface of the underground structure. The perforated cover 220 needs to be arranged so as to be in close contact with the inner surface of the underground structure in order to prevent a fluid or foreign material such as rainwater from entering the inside through the perforation.

According to one embodiment, an adhesive is applied to one surface of the perforated cover 220 facing the inner surface of the underground structure, and may be adhered to the inner surface of the underground structure.

According to another embodiment, the perforated cover 220 may be in contact with an adapter 230 to be described later and one surface facing the inner space of the underground structure. When the first grounding rod 110 is fully inserted into the ground, the perforated cover 220 may be pulled by the first grounding rod 110 or the adapter 230 to be in close contact with the inner surface of the underground structure.

The adapter 230 may be formed in a cylindrical shape to fill a hole formed in the outer wall of the underground structure by the first grounding rod 110 . Referring to FIG. 3 , the adapter 230 may have a screw thread formed on its inner circumferential surface to be bolted to the first grounding rod 110 . According to the present embodiment, the adapter 230 may be bolted to the first grounding rod 110 and inserted into the perforation.

The other side facing the outside of the adapter 230 is exposed to the outside to be exposed to pressure or temperature change, etc., and is preferably made of a material with little change in volume due to pressure or temperature change.

The connecting rod 240 may be disposed in the perforation of the underground structure to form a passage through which the lead wire 210 passes from the inside to the outside of the underground structure. The connecting rod 240 may function to prevent the lead wire 210 from being damaged in the process of passing through the outer wall of the underground structure, and to prevent the inflow of rainwater or foreign substances into the interior through the perforation of the underground structure.

Referring to the embodiment of FIG. 1 , the connecting rod 240 may be disposed in a perforation adjacent to the second grounding rod 120 among the perforations of the underground structure. The perforation close to the first ground rod 110 is blocked by the adapter 230 and the perforation cover 220 to prevent the inflow of rainwater or foreign substances into the inside through the perforation of the underground structure despite the absence of the connecting rod 240 . preventive function can be performed.

Referring to FIG. 2 , the first ground copper rod 110 according to the present invention may include an enclosed cover 111 , an enclosed body 112 and a perforator connection part 113 .

The enclosed cover 111 is disposed on one end of the enclosed body 112 and may be formed detachably. Therefore, when the outer wall of the concrete material is polished by friction with the soil during the construction process of forming a perforation in the outer wall of the underground structure, replacement may be possible. A thread is formed inside the enclosed cover 111 so that it can be bolted to the enclosed body 112 .

Enclosed cover 111 may be formed in a conical shape with one side pointed in order to provide penetrating force for the first ground copper rod 110 to be drawn into the ground or to form a perforation in the outer wall of the underground structure. According to another embodiment, two blades are wound on a cone and may be formed in a shape surrounding the outer surface. According to another embodiment, four blades are wound on a cone and may be formed in a shape surrounding the outer surface.

In addition, the enclosure cover 111 may be formed of a material having high strength in consideration of friction with the outer wall and soil of the underground structure. Considering that the outer wall of a conventional underground structure is formed of concrete, artificial diamond may be selected.

Enclosed body 112 may be formed in a long cylindrical shape in the longitudinal direction. Referring to the embodiment of Figure 2, the enclosed body 112 may be formed with a screw thread on the circumferential surface. Enclosed body 112 may be formed of a conductor to provide the traction force of the first grounding rod (110).

The perforator connection part 113 may be disposed at the other end of the enclosed cover 111 of the enclosed body 112 is not connected. It can thus be fitted into a perforator for perforation. The shape of the perforator connection part 113 may be fluidly changed according to the inlet of the perforator.

Referring to FIG. 3 , the perforated cover 220 and the adapter 230 may be coupled to the first grounding rod 110 according to the present invention. Referring to FIG. 4 , the perforated cover 220 and the adapter 230 are formed with a diameter corresponding to the diameter of the enclosed body 112 to be bolted to the first ground copper rod 110 , and further the enclosed body 112 . A thread may be formed on the inner peripheral surface to correspond to the thread formed on the outer peripheral surface of the .

The perforator connection part 113 may be formed to have a longer diameter than the diameter of the enclosed body 112 in order to prevent separation of the perforation cover 220 and the adapter 230 . In addition, the perforator connection part 113 may be formed with a protruding bump on the outer circumferential surface in order to prevent separation of the perforation cover 220 and the adapter 230 and limit the inlet range of the perforator. According to the embodiment of FIG. 3, it may be formed in a protruding ring shape to have a predetermined height.

Hereinafter, an underground grounding method using an underground grounding apparatus according to an embodiment of the present invention will be described with reference to FIGS. 5 and 6 .

Referring to the embodiment of Figure 5, the starting step means an excavation step of excavating so that the side wall of the underground structure buried in the ground can be exposed to the outside. (not shown)

In the underground grounding method according to an embodiment of the present invention, the conventional underground grounding method excavates the periphery of an external structure to bury the grounding rod, and then connects it in parallel to the grounding connection enclosure for burial again. The side wall of the underground structure is drilled through the enclosure 110, and the first grounding rod 110 and the second grounding copper rod 120 are connected by the lead wire 210 inside the underground structure, the advantage of a narrower excavation area have

The first ground copper rod 110 having a screw thread formed on the outer surface is connected to the perforator. (S101)

The first grounding rod 110 is connected by operating a perforator to rotate the first grounding rod 110 and to make a hole in contact with the side wall of the underground structure. (S102) Alternatively, first, the side wall of the underground structure is perforated using a perforator, and then the first ground copper rod 110 may be connected to the perforator and inserted into the ground. (not shown)

When the hole in the side wall of the underground structure is completed and the first grounding rod 110 is buried in the soil, the first grounding rod 110 and the second grounding copper rod 120 are connected with a lead wire 210 . (S103)

The side wall perforation step (S102) may include perforating one side wall of the underground structure and then perforating the other side wall of the underground structure. (not shown)

The lead wire connection step (S103) may be performed by inserting the connecting rod 240 into the perforation formed in the side wall of the underground structure, and inserting the lead wire 210 into the connecting rod. (not shown)

Referring to the embodiment of FIG. 6 , after the lead wire connection step ( S103 ) is finished, the grounding value can be checked whether the grounding function of the underground structure can be smoothly performed by the grounding device. (S104)

When the grounding value measured in the grounding test step S104 is lower than the reference, the grounding reducing agent may be applied to the first grounding enclosure 110 . (S106)

The grounding value may be determined based on a predetermined value in consideration of the size, material, and surrounding environment of the underground structure.

After the grounding reducing agent application step (S106) is finished, the grounding test step (S104) may be performed again.

When the grounding value measured in the grounding test step S104 is higher than the reference, the grounding is terminated.

As such, those skilled in the art to which the present invention pertains will understand that the above-described technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the foregoing detailed description, and the meaning and scope of the claims And all changes or modifications derived from the equivalent concept should be construed as being included in the scope of the present invention.

1: earth grounding device
100: ground
110: first ground rod
111: enclosed cover
112: enclosed body
120: second ground rod
200: ground connection
210: lead wire
220: perforated cover
230: adapter
S101: perforation preparation stage
S102: side wall drilling step
S103: Lead wire connection step
S104: ground test step
S106: Ground reducing agent application step

Claims (21)

a grounding unit for grounding the underground structure; and
a ground connection part connected to the ground part;
including,
The grounding part,
A first ground copper rod having a screw thread formed on the outer circumferential surface to be inserted into the ground or to perforate the outer wall of the underground structure;
including,
The ground connection part,
a perforated cover for preventing fluid from flowing into a perforation formed in the outer wall of the underground structure by the first grounding rod;
including,
The perforated cover,
Underground grounding device, characterized in that it has a longer diameter than the diameter of the first grounding rod and is arranged to be in close contact with the inner surface of the underground structure.
According to claim 1,
The grounding part,
a second grounding rod for grounding the underground structure;
further comprising,
The ground connection unit is an underground grounding device, characterized in that for connecting the first grounding rod and the second grounding rod.
3. The method of claim 2,
The ground connection part,
a lead wire having one end connected to the first ground copper rod and the other end connected to the second ground copper rod;
An earth grounding device comprising a.
4. The method of claim 3,
The lead wire is
An underground grounding device, characterized in that it is formed of a conductor through which a current between the first grounding rod and the second grounding rod can pass.
delete delete delete According to claim 1,
The perforated cover,
Underground grounding device, characterized in that the adhesive is applied to one surface facing the inner surface of the underground structure.
According to claim 1,
The ground connection part,
an adapter formed in a cylindrical shape to fill a hole formed in the outer wall of the underground structure by the first grounding rod;
An underground grounding device comprising a.
10. The method of claim 9,
The adapter is
Ground grounding device, characterized in that the thread is formed on the inner peripheral surface so as to be bolted to the first grounding rod.
10. The method of claim 9,
The perforated cover,
Underground grounding device, characterized in that the adapter is disposed to be in close contact with one side facing the inner space of the underground structure.
4. The method of claim 3,
The ground connection part,
a connecting rod disposed in the perforation of the underground structure and through which the lead wire passes through the inside;
Underground grounding device, characterized in that it further comprises.
13. The method of claim 12,
The connecting rod is
An underground grounding device, characterized in that it is disposed in a hole adjacent to the second grounding rod among the drillings of the underground structure.
According to claim 1,
The first grounding rod,
Enclosed cover detachable to one end;
An underground grounding device comprising a.
15. The method of claim 14,
The enclosed cover,
In order to improve penetrating power, an underground grounding device, characterized in that one side is formed in a pointed cone shape.
15. The method of claim 14,
The enclosed cover,
An underground grounding device, characterized in that it is formed of a material that can withstand friction with the outer wall of the underground structure and the soil.
4. The method of claim 3,
The lead wire is
In order to prevent disconnection, at least two or more conductors are connected in parallel. delete delete delete delete

Images