KR102505135B1 - Ground rod with earth resistance reducing agent and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a grounding reducer integrated grounding rod and a method for manufacturing the same, a rod-shaped main body buried in the ground, an outer shell coupled to surround the outer circumferential surface of the main body, and a grounding reducing agent filled between the main body and the outer shell includes

Description

Ground rod with earth resistance reducing agent and manufacturing method thereof}

The present invention relates to a grounding rod, and more particularly, to a grounding reducing agent integrated grounding rod and a manufacturing method thereof.

In general, grounding rods are installed in various electrical facilities such as streetlights or switchboards installed on roads to discharge lightning introduced through lightning rods or surges generated from various electrical facilities to the ground.

In other words, the grounding rod protects users from electric shock accidents when excessive abnormal voltages such as lightning surges or switching surges occur in power facilities, insulation failures, power circuits or electronic devices. It serves to prevent insulation breakdown.

These grounding rods are mainly copper-based metal rods, and are buried under the ground in a state in which grounding is possible with electrical facilities and earth wires.

At this time, the work of installing the ground rod is a process in which several workers dig the ground to a certain depth below the ground at an arbitrary point away from the installation point of the electrical facilities to secure an installation space for the ground rod, and insert the ground rod into the landfill installation process proceeds with

Construction methods for grounding electrical installations include core tapping, mesh grounding, plate grounding, and XIT grounding.

Here, the depth-cutting method is a method of digging a site at a depth of 75 cm or more from the ground and driving a general earthing rod into the ground with physical force such as a hammer, and mesh grounding is a method of digging a site at a depth of 75 cm or more from the ground, laying spiral copper in a mesh shape, and backfilling. The grounding method is a method of digging a site at a depth of more than 75cm from the ground, spreading the grounding plate, and then backfilling it. In addition, XIT grounding is a method of drilling the ground to a depth of about 10 to 30m by the bowling method with a diameter of about 15cm, inserting an XIT rod, filling it with grounding reducer, and finishing with a protective opening and closing box.

However, in the case of the core hitting method and plate grounding, it is difficult to obtain the required grounding value even if many grounding rods are driven, and at this time, a reducing agent is put in a certain area around the grounding electrode.

In addition, in the case of mesh grounding, a large area is required, and even in a large area, a required grounding resistance value cannot be obtained, so an additional grounding reducer is used.

In addition, in the case of XIT grounding, after drilling a 150mm hole with a depth of about 10 to 30m by erecting a bowling machine for grounding, inserting a 54mm grounding rod and adding a reducing agent, it is expensive and takes time to move, install, and dismantle the equipment It has the disadvantage of having to deal with the soil that has been dug up with a lot of this.

Normally, grounding is done by burying a metal grounding rod in the ground and electrically connecting the grounding rod to the equipment. However, the grounding resistance of metal grounding rods is generally too large, and even if the grounding resistance is properly set, the grounding resistance increases during use, so that the grounding is not properly performed.

This is because the grounding resistance between the metal grounding rod and the soil varies depending on the state of the soil, and the metal grounding rod is corroded due to an electrostatic reaction with the soil.

In addition, in areas with high land resistivity, it is difficult to lower the ground resistance to the desired level by only driving metal ground rods into the ground or burying ground wires (bare copper wires), and a separate ground reducing agent is applied around the ground rods to lower the ground resistance. it will require work.

The present invention has been made to solve the problems described above, and an object of the present invention is to provide a grounding reducer integrated grounding rod with excellent grounding resistance performance and a manufacturing method thereof.

Another object of the present invention is to provide a grounding reducer integrated grounding rod with excellent grounding performance by increasing the contact area with the ground and a manufacturing method thereof.

Another object of the present invention is to reduce the possibility of loss of the grounding reducing agent to provide a grounding reducing agent integrated grounding rod with good aging characteristics and a manufacturing method thereof.

The object of the present invention described above, the main body of the rod (rod) form embedded in the ground; an outer shell coupled to surround an outer circumferential surface of the main body; And it can be achieved by providing a grounding reducing agent integrated ground rod comprising a grounding reducing agent filled between the main body and the outer shell.

According to one feature of the present invention, the outer shell may be a conductive fiber material.

According to another feature of the present invention, a pair of fixing bands coupled to both ends of the body in the longitudinal direction to seal the outer shell may be further included.

According to another feature of the present invention, a ground terminal inserted into the upper end of the main body and having a bare copper wire for connection with a ground wire on one side may be further included.

According to another feature of the present invention, the grounding reducing agent may include 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite.

On the other hand, the above-described object of the present invention, the rod (rod) type body outer circumferential surface wrapping the outer skin coupling step; Sealing the lower end of the shell by bringing the lower end of the shell into close contact with the outer circumferential surface of the main body; A grounding reducing agent filling step of filling a grounding reducing agent between the main body and the outer shell; And it can also be achieved by providing a method of manufacturing a grounding reducer integrated grounding rod comprising a sealing step of sealing the upper end of the outer shell by bringing the upper end of the outer shell into close contact with the outer circumferential surface of the main body.

At this time, according to one feature of the present invention, vibration may be applied to the main body in the grounding reducing agent filling step.

According to another feature of the present invention, the grounding reducing agent may be prepared by mixing 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite.

According to the grounding reducing agent integrated grounding rod according to the present invention, there is an effect of improving the grounding resistance performance by integrating the grounding rod main body and the grounding reducing agent.

In addition, according to the grounding reducer integrated grounding rod according to the present invention, it is not necessary to separately bury the grounding reducing agent during the construction of the grounding rod, so there is an effect of reducing construction time and cost.

In addition, according to the grounding reducer integrated grounding rod according to the present invention, the outer surface of the grounding rod main body and the grounding reducer is wrapped with a conductive sheath, thereby increasing the contact area with the ground, thereby improving the grounding performance.

In addition, according to the grounding reducer integrated grounding rod according to the present invention, moisture in the ground is permeated through the outer shell, and the grounding effect is excellent because the grounding reducer retains this moisture.

1 is a perspective view of a grounding reducer integrated ground rod according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of Figure 1;
Figure 3 is a cross-sectional view in the AA direction of Figure 1;
Figure 4 is a state of use of the grounding reducer integrated ground rod according to an embodiment of the present invention.
Figure 5 is a flow chart of a method for manufacturing a grounding reducer integrated ground rod according to an embodiment of the present invention.
Figure 6 is a schematic diagram of a manufacturing apparatus for a grounding reducer integrated ground rod according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments described below are only intended to be described in detail so that those skilled in the art can easily practice the invention, thereby limiting the scope of protection of the present invention. doesn't mean And in describing various embodiments of the present invention, the same reference numerals will be used for components having the same technical characteristics.

Example

1 is a perspective view of an earthing reducer integrated grounding rod according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of FIG. 1 , and FIG. 3 is a cross-sectional view in the direction A-A of FIG.

As shown in FIGS. 1 to 3, the grounding reducer integrated grounding rod (hereinafter referred to as 'grounding rod') 100 according to an embodiment of the present invention includes a main body 200 in the form of a rod, and a main body ( 200), and a grounding reducing agent 400 filled between the shell 300 surrounding the outer circumferential surface of the body 200 and the shell 300.

Here, the main body 200 is buried in the ground, and the lower end is formed sharp to be easily driven into the ground, and at the upper end, a coupling groove 210 for coupling a ground terminal 500 described later is formed vertically along the axis do.

For example, as shown in the drawing, the lower end of the main body 200 may be formed as a solid rod with a conical tip and a pointed end, and the upper end may be formed in the form of a hollow rod having a coupling groove 210. In the case of an example, an example in which the coupling part 220 in the form of a hollow pipe is formed by expanding the upper end is shown.

In addition, if necessary, a plurality of units in the form of solid rods and/or hollow rods may be combined in a row by welding or the like to form the overall appearance of the main body 200 .

The main body 200 is made of a metal material such as silver, aluminum, copper, or stainless steel having high conductivity, and is preferably made of copper in consideration of economy and corrosion resistance.

The outer shell 300 is coupled to surround the outer circumferential surface of the body 200. The shell 300 serves to maintain a close contact between the grounding reducer 400 and the main body 200, which will be described later, and can be manufactured in a cylindrical shape with both upper and lower ends open so that the main body 200 can be inserted. At this time, the coupling part 220 at the top of the main body 200 and the conical tip 230 at the bottom of the main body 200 pass through the outer shell and are exposed to the outside.

The sheath 300 is made of a fabric such as fabric or non-woven fabric made of a conductive fiber material. Here, 'conductive fiber' refers to a fiber that has conductivity by inserting carbon black, which allows electricity to flow, or depositing metal on the surface of the fiber. point

Meanwhile, a space is formed between the main body 200 and the shell 300, and the grounding reducing agent 400 is filled in the space. The grounding reducer 400 serves to lower the grounding resistance with the soil around the main body 200 by maintaining conductivity and moisture, and the effect of further lowering the grounding resistance by increasing the contact area with the soil around the main body 200 There is also

At this time, the grounding reducing agent 400 may include 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite.

Here, bentonite is mainly a mineral accompanied by chemical transformation of vitreous volcanic substances such as tuff or volcanic ash, or a rock composed of crystalline clay formed by devitrification, such as feldspar, biotite, quartz, calcite, etc. accompanies the minor constituent minerals of It is similar to the properties of montmorillite, such as swelling by adsorbing water and clear cation exchange.

Carbon (graphite) is black, not transparent, and has a hardness of 1, which is a very soft material. It is also a good conductor of electricity. Carbon is an element with very high melting and sublimation points, and at 1 atm, it does not melt no matter how high the temperature. Carbon can form direct covalent bonds with other carbon atoms, hydrogen atoms, and other atoms. Carbon has a relatively positive charge when it bonds with an element with a higher electronegativity than itself (e.g. carbon-halogen bond, carbon-oxygen bond, etc.), and a relatively negative charge when it bonds with an element with a lower electronegativity than itself. Because it can have, it can form various compounds or participate in reactions.

Vermiculite is a clay mineral made of hydroxysilicate of aluminum, magnesium, and iron. It has a hardness of 1 to 2 and a specific gravity of 2.76. It is grayish white or brown and has a pearl luster. It is easily decomposed by acid, has a high cation exchange capacity, and expands when heated. It is porous and has good absorption capacity, so it is widely used as a heat-resistant material and soundproofing material.

Both upper and lower ends of the outer shell 300 are sealed to prevent leakage of the grounding reducing agent 400. To this end, the outer shell 300 may be coupled to the outer circumferential surface of the main body 200 by a pair of fixing bands 310 . For example, as shown in the drawing, a pair of fixing bands 310 may be coupled to each of the upper and lower ends of the outer shell 300, and each fixing band 310 presses the outer shell 300 to the main body ( 200) to seal the outer shell 300 by adhering to the outer circumferential surface. At this time, the fixing band 310 may be made of rubber, synthetic resin, or a metal material, and may be coupled to the main body 200 by adhesion, fusion, or fasteners such as bolts.

As described above, the grounding rod 100 according to an embodiment of the present invention, the main body 200 and the grounding reducing agent 400 by the outer shell 300 surrounding the main body 200 and the grounding reducing agent 400 is provided integrally. Therefore, compared to the case of burying only the main body 200, the ground resistance performance is excellent, and since the work of burying a separate grounding reducer 400 is not required during construction, construction time and cost are reduced compared to the prior art. has the effect of

In addition, as the outer shell 300 surrounding the grounding reducing agent 400 is made of a conductive fiber material, the contact area between the main body 200 and the soil is increased to improve grounding performance, and the grounding reducing agent 400 ) is less likely to be lost, which has the effect of improving the characteristics of secular change. In addition, since moisture is permeated through the outer shell 300 and the grounding reducing agent 400 retains this water, there is also an effect of improving the grounding effect.

Meanwhile, the ground terminal 500 is coupled to the coupling groove 210 of the upper end of the main body 200 . The ground terminal 500 may be made of a metal material such as silver, aluminum, copper, or stainless steel having high conductivity, and is preferably made of copper in consideration of economy and corrosion resistance.

The ground terminal 500 is formed in the form of a rod shorter than the body 200 as a whole, and the lower end is formed in a conical shape so that it can be press-fitted into the coupling groove 210 of the body 200. In addition, a bare copper wire 510 for connection with the ground wire 520 (see FIG. 4) is provided on one side of the ground terminal 500.

Figure 4 is a state diagram of the use of the grounding reducer integrated grounding rod according to an embodiment of the present invention, the grounding rod 100 is buried in the ground and the grounding wire 520 connected to the bare copper wire 510 extends in the direction of an electrical installation (not shown) It shows what it looks like.

Figure 5 is a flow chart of a method for manufacturing a grounding reducer integrated grounding rod according to an embodiment of the present invention, Figure 6 is a schematic diagram of a manufacturing apparatus for a grounding reducer integrated grounding rod according to an embodiment of the present invention.

Hereinafter, with reference to FIGS. 5 and 6, a method of manufacturing a grounding reducing agent integrated grounding rod according to an embodiment of the present invention will be described in detail step by step.

Bonding the skin (S10):

The outer circumferential surface of the body 200 in the form of a metal rod is wrapped with the outer shell 300. For example, the main body 200 can be inserted into the outer shell 300 in the form of a cylinder with both upper and lower ends open. To be exposed to the outside of the shell (300).

Sealing the lower part of the outer shell (S20):

The lower end of the shell 300 is brought into close contact with the outer circumferential surface of the main body 200 and sealed with a fixing band 310 .

grounding reducer filling (S30):

The grounding reducing agent 400 is filled in the space between the main body 200 and the outer shell 300. As an example, the filling of the grounding reducing agent 400 may be automatically performed by the manufacturing apparatus 10 as shown in FIG. 400 is prepared.

Here, the ground reducing agent 400 may include 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite, and is installed on one side of the mixer 20 through the conveyor 30. It is transported to the ejector 40.

When the grounding reducing agent 400 is supplied to the constant discharger 40 by the conveyor 30, the constant discharger 40 discharges a certain amount of the grounding reducing agent 400 downward by the control device 41 do.

At the bottom of the metered dispenser 40, an outer shell 300 with a lower end sealed to the main body 200 is mounted vertically on the cradle 50 together with the main body 200, and the ground reducing agent 400 is the outer shell 300 And the space between the main body 200 is filled. At this time, a vibration generator 60 may be installed on one side of the main body 200, and the vibration generated from the vibration generator 60 is transmitted to the main body 200 and the shell 300. The transmitted vibration vibrates the grounding reducing agent 400 filled in the space between the outer shell 300 and the main body 200, and thus the grounding reducing agent 400 moves between the outer shell 300 and the main body 200. are evenly filled in

On the other hand, a dust collector 70 is installed on one side of the fixed amount discharger 40, and a guide 72 is installed at the end of the dust collector 71 extending from the dust collector 70 to the outside of the main body 200. The guide 72 sucks the dust and grains scattered around the outer shell 300 when the grounding reducer 400 is filled and transfers them to the dust collector 70, and the captured dust and grains are collected by the dust collector 70 and the fixed discharger It is again supplied to the metered discharger 40 through the circulation pipe 73 installed between the 40.

Sealing the upper part of the shell (S40):

When the filling of the grounding reducing agent 400 is completed, the open upper end of the shell 300 is brought into close contact with the outer circumferential surface of the main body 200, sealed with a fixing band 310, and then separated from the holder 50.

Ground Terminal Combination (S50):

Then, the ground terminal 500 is coupled to the top of the main body 200 . The conical lower end of the ground terminal 500 is inserted into the coupling groove 210 at the upper end of the main body 200, and at this time, the ground terminal 500 may be coupled to the upper end of the main body 200 by press fitting or screwing. A bare copper wire 510 is provided on one side of the grounding terminal 500, and the grounding wire 520 is connected to the bare copper wire 510 of the grounding terminal 500 during the buried construction of the grounding rod 100.

Although the embodiments of the present invention have been described above, it is understood that those skilled in the art can make various modifications without departing from the scope of the claims of the present invention.

100: ground rod 200: main body
210: coupling groove 220: coupling portion
230: conical tip 300: outer shell
310: fixed band 400: grounding reducer
500: ground terminal 510: bare copper wire

Claims (8)

A main body in the form of a rod embedded in the ground and having a coupling groove at the top formed vertically along an axis;
an outer shell made of a conductive fiber material coupled to surround an outer circumferential surface of the main body;
Grounding reducing agent filled between the main body and the outer shell;
A pair of fixing bands coupled to both ends of the main body in the longitudinal direction to seal the outer shell; and
A grounding reducer integrated grounding rod including a grounding terminal having a lower end formed in a conical shape and pointed to be inserted into the coupling groove of the upper part of the main body and having a bare copper wire on one side for connection with a grounding wire. delete delete delete The method of claim 1,
The grounding reducer is a grounding reducer integrated ground rod, characterized in that it comprises 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite. A shell coupling step of wrapping an outer circumferential surface of a main body in the form of a rod in which a coupling groove is formed vertically along an axis at the top with an outer shell of conductive fiber material;
Sealing the lower end of the outer shell with a fixing band by bringing the lower end of the outer shell into close contact with the outer circumferential surface of the main body;
A grounding reducing agent filling step of filling the grounding reducing agent between the main body and the outer shell by a metered discharger while applying vibration to the main body by a vibration generator;
Sealing the upper end of the outer shell by bringing the upper end of the outer shell into close contact with the outer circumferential surface of the main body and sealing the upper end of the outer shell with a fixing band; and
A method of manufacturing a grounding reducer integrated grounding rod comprising a grounding terminal coupling step of inserting and combining the conical lower end of the grounding terminal having a bare copper wire on one side into the coupling groove at the top of the main body. delete The method of claim 6,
The grounding reducing agent is a method of manufacturing a grounding reducing agent integrated grounding rod, characterized in that prepared by mixing 40 to 60% by weight of bentonite, 30 to 50% by weight of carbon, and 5 to 15% by weight of vermiculite.

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