KR101396278B1 - Improved needle-shaped discharge electrode pole and method for manufacturing the same - Google Patents

Abstract

An objective of the present invention is to provide an improved needle-shaped electrode bar which is capable of shortening discharge time and improving discharge efficiency by reducing electric resistance and a discharge initiating voltage of the needle-shaped electrode bar made of stainless, and to a method of manufacturing the same. An improved needle-shaped electrode bar according to the present invention includes a first ground bar with a hollow pipe shape; a second ground bar with a hollow pipe shape installed in the first ground bar; an insulating material charged in the second ground bar; a plurality of discharging needles spaced apart from each other in a longitudinal direction of the first ground bar at regular intervals and fixed to an outer surface of the first ground bar in a radial direction; a lead line installed to the front end of one side or both sides of the first ground bar in a longitudinal direction to be electrically connected to facilities on the ground; and a welding portion for supporting the discharging needles to be fixed to the outer surface of the first ground bar. According to the present invention, the electric resistance and discharge initiating voltage of the needle-shaped electrode bar made of stainless can be reduced so that discharge time can be shortened and discharge efficiency can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to an improved needle electrode electrode and a method of manufacturing the electrode electrode.

The present invention relates to an improved needle electrode and its manufacturing method. More particularly, the present invention relates to an improved needle electrode of a needle electrode using a stainless steel electrode and an improved needle electrode by reducing a discharge start voltage to shorten a discharge time, ≪ / RTI >

Generally, a lightning strike is an electric energy generated by static electricity when it is charged by static air current. It is necessary to provide a grounding facility when constructing various facilities to discharge electric current quickly to the ground when a lightning is received to prevent damage have.

A grounding facility is a structure in which lightning damage is a concern, a grounding pole connected to a steel structure by a lead wire and buried in the ground. In particular, a lightning rod is installed at the upper end of the building.

In addition, a ground electrode such as a mesh grounding wire, a radial grounding network, or a grounding bar made of a simple copper, or a grounding wire is connected to the end of the buried copper wire to distribute it to a wide area.

Conventionally, the copper wire is formed thick as described above by placing a specific weight on only the factors such as the contact area between the ground electrode and the soil, the resistance of the earth electrode itself, the area of the earth electrode and the like, and a mesh grounding network, a radial grounding network, If grounding pole such as copper grounding wire or grounding wire is distributed in a large area or installation area is small, grounding pole is installed under rock bed underground or until groundwater layer touches. It can not be discharged to the ground, and an elevation of the ground potential causes an undershoot, thereby destroying the facility or the electronic device.

1 shows a needle electrode according to the prior art. The needle electrode 10 has a ground bar 11 embedded in the ground, and a ground bar 11 around the ground bar 11, A plurality of circular surge rings 12 are coupled and a plurality of discharge needles 13 having sharp ends are radially provided around the surge ring 12.

However, the needle electrode 10 according to the related art has a problem in that the work process is complicated because a plurality of the surge rings 12 are fixed to the ground bar 11 by using the bolts (not shown) after connecting the ground bar 11 to the ground bar 11, There is a problem that the discharge function is deteriorated due to the gap between the grounding bar 11 and the surge ring 12 when the binding force by the bolt becomes poor.

In order to solve such a problem, a needle electrode as shown in Figs. 2 and 3 has been proposed.

The needle electrode 20 according to Figs. 2 and 3 has a tubular ground bar 21 having a predetermined length and a diameter and a resin 22 as a non-conductive member in the hollow interior formed in the longitudinal direction of the ground bar 21 And a plurality of discharge needles 23 are fastened and fixed around the ground bar 21 in the radial direction through the screw holes 24.

The discharge needle 23 may be additionally fixed after welding by screwing to prevent the binding force with the screw hole 24 from being lowered.

The needle electrode 20 according to the related art has a problem in that a work process becomes complicated by screwing the discharge needle 23 around the ground rod 21. [

In addition, the needle electrode bar 20 according to the prior art is formed of stainless steel which is resistant to corrosion due to its property of being embedded in the ground.

However, such a stainless steel is advantageous in corrosion resistance, but has a problem in that discharge time is increased due to a large electric resistance.

Further, as the electrical conduction is slow and the discharge start voltage is increased and the discharge start voltage is increased, the stainless steel is discharged only at a specific portion (for example, at the front portion of the needle electrode) of the needle electrode 20 where the surge is inputted, There is a problem that the discharge efficiency is reduced due to an increase in the fatigue of the specific portion where the discharge occurs.

In order to solve the above problems, the present invention aims to provide an improved needle electrode and a method for manufacturing the same, in which the electrical resistance and the discharge starting voltage of the needle electrode using stainless steel are reduced to shorten the discharge time and improve the discharge efficiency.

According to an aspect of the present invention, there is provided an improved needle electrode comprising: a pipe-shaped first ground bar having a hollow therein; A second ground bar which is provided inside the first ground bar to prevent a discharge time of the first ground bar from being increased in close contact with the first ground bar and to prevent the discharge efficiency of the first ground bar from decreasing, ; An insulator filled in the second ground bar to block the generation of internal arc discharge in the second ground bar; A plurality of discharge needles radially fixed to the outer surface of the first ground bar at a predetermined interval in the longitudinal direction of the first ground bar; A lead wire provided at one longitudinal end or both longitudinal end portions of the first ground bar to be electrically connected to facilities on the ground; And a welding portion for supporting the discharge needle so as to be fixed to an outer surface of the first ground bar, wherein the first ground bar, the second ground bar and the insulator are electrically connected to the first ground bar and the second ground bar, And the insulator is tightly fixed by drawing.

delete

In addition, the discharge needle according to the present invention is fixed through spot welding.

In addition, the first ground bar according to the present invention is stainless steel, and the second ground bar is any one of aluminum, an aluminum alloy, or a metal material having an electric conductivity of a predetermined value or more.

In addition, the present invention provides a method of manufacturing an improved needle electrode, comprising the steps of: a) closing the first ground bar in close contact with the first ground bar to prevent an increase in the discharge time of the first ground bar, Inserting an insulator for blocking internal arc discharge of the second ground bar inside the second ground bar to assemble the needle electrode; b) a needle electrode having the first and second ground rods and the insulator inserted therein is passed through a die having a diameter smaller than the diameter of the first ground bar to reduce the contact resistance between the first and second ground rods and the insulator, (Drawing) so as to improve the surface roughness; c) cutting the drawn needle electrodes at regular intervals; d) welding a plurality of discharge needles in a radial direction to the outside of the needle electrode while maintaining a predetermined distance in the longitudinal direction of the cut needle electrode; And e) connecting the lead wire for connecting with a facility on the ground at least one side of the needle electrode in the longitudinal direction of the needle electrode to which the discharge needle is welded.

In addition, the discharge needle according to the present invention is fixed through spot welding.

The present invention is advantageous in that the electric resistance and the discharge starting voltage of the needle electrode using stainless steel are reduced to shorten the discharge time and improve the discharge efficiency.

1 is a perspective view showing a needle electrode according to a prior art;
2 is a perspective view showing another embodiment of a needle electrode according to the prior art;
3 is a sectional view showing the structure of a needle electrode according to FIG.
4 is a perspective view showing a configuration of an improved needle electrode according to the present invention.
5 is a sectional view showing the structure of the improved needle electrode according to FIG.
6 is a flowchart illustrating a process of manufacturing the improved needle electrode according to the present invention.

Hereinafter, preferred embodiments of the improved needle electrode according to the present invention and the method for manufacturing the same will be described in detail with reference to the accompanying drawings.

(Needle electrode)

FIG. 4 is a perspective view illustrating the structure of the improved needle electrode according to the present invention, and FIG. 5 is a cross-sectional view illustrating the structure of the improved needle electrode according to FIG.

As shown in FIGS. 4 and 5, the improved type needle electrode 100 according to the present invention is a grounding device buried in the ground to discharge a surge current caused by a lightning stroke by electrically connecting to ground facilities, A second grounding rod 120, an insulator 130, a discharge needle 140, a lead wire 150, and a welded portion 160.

The first ground bar 110 is a pipe-shaped metal member having a hollow inside, and it is preferable to use stainless steel for preventing corrosion in the ground.

The second ground bar 120 is a pipe-shaped metal member having a hollow inside and is inserted into the first ground bar 110 and closely contacted with the inner surface of the first ground bar 110.

In addition, the second ground bar 120 prevents an increase in discharge time due to a large electrical resistance of the first ground bar 110, and a decrease in discharge efficiency due to a low electrical conductivity of the first ground bar 110 Aluminum, an aluminum alloy, or a metal material having an electric conductivity of a predetermined value or more, preferably an aluminum alloy.

The insulator 130 is filled in the second ground bar 120 to prevent arc discharge generated in the second ground bar 120 from being discharged due to a surge.

The first ground bar 110 and the second ground bar 120 and the insulator 130 are disposed between the first ground bar 110 and the second ground bar 120 and between the second ground bar 120 and the insulator 130. [ The inner surface of the first ground bar 110 and the outer surface of the second ground bar 120 are brought into close contact with each other through a drawing process so that a gap is not formed in the inner surface of the second ground bar 120, And the insulator 130 are brought into close contact with each other, so that the contact resistance is minimized so that the discharge efficiency can be improved.

That is, the needle bar electrode 100 inserted with the first ground bar 110, the second ground bar 120 and the insulator 130 is passed through a die having a diameter smaller than the outer diameter of the first ground bar 110 The first ground bar 110 and the second ground bar 120 and the insulator 130 are closely contacted through the drawing process.

The discharge needle 140 is a metal member that is fixed at a predetermined distance in the longitudinal direction of the first ground bar 110 and fixed to the outer surface of the first ground bar 110 in a radial direction, and is preferably made of stainless steel.

In addition, the discharge needle 140 has four discharge needles 140 radially installed on the outer surface of the first ground bar 110 and four discharge needles 140 installed in the radial direction, Are arranged and fixed at predetermined intervals along the longitudinal direction of the body 110.

The lead wire 150 is installed at one side or both ends of the first ground bar 110 in the longitudinal direction so that the first ground bar 110 is electrically connected to ground facilities.

The welding part 160 is configured to support the discharge needle 140 to be fixed to the outer surface of the first ground bar 110 and is formed through spot welding to form a gap between the first ground bar 110 and the discharge needle 140 So that the contact resistance can be minimized.

(Manufacturing process)

6 is a flowchart illustrating a manufacturing process of the improved needle electrode according to the present invention.

4 to 6, a method of manufacturing an improved needle electrode according to the present invention includes a step S100 of assembling the needle electrode 100, a step S200 of pulling out the assembled needle electrode 100, (S400) of welding the discharge needle (140) to the cut needle electrode (100); a step (S400) of cutting the needle electrode bar And connecting the lead wire 150 to the lead wire 150.

In step S100, the second ground bar 120 is inserted into the first ground bar 110, and the needle bar 100 is inserted into the second ground bar 120 by inserting the insulator 130 into the interior of the first ground bar 110 do.

In step S200, the needle electrode 100 having the first and second ground rods 110 and 120 and the insulator 130 assembled therein is inserted into a die having a diameter smaller than the outer diameter of the first ground bar 110 die so that the inner surface of the first ground bar 110 and the outer surface of the second ground bar 120 and the inner surface of the second ground bar 120 and the insulator 130 are brought into close contact with each other.

In step S300, the needle electrode 100 drawn in step S200 is cut at regular intervals according to the standard of the product.

In step S400, four discharge needles 140 are fixed by spot welding to the outer surface of the needle electrode 100 cut at regular intervals according to the standard in step S300 in the radial direction, So that the four discharge needles 140 are welded at regular intervals along the longitudinal direction.

In step S500, a lead wire 150 having terminals formed on one side or both sides of the lengthwise end of the needle electrode rod 100 welded with the discharge needle 140 to connect with facilities on the ground is connected through spot welding .

Therefore, by reducing the electrical resistance and the discharge starting voltage of the needle electrode using stainless steel through the grounding rod made of aluminum having high electrical conductivity, it is possible to shorten the discharging time and improve the discharging efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intentions or customs of the user, the operator, and the definitions of these terms should be based on the contents throughout this specification.

100: needle electrode
110: first ground bar
120: second ground bar
130: Insulator
140: Discharge needle
150: Lead wire
160:

Claims (6)

As an improved needle electrode,
A first ground rod 110 in the form of a pipe having a hollow inside;
The first ground bar 110 is provided inside the first ground bar 110 and is in close contact with the first ground bar 110 to prevent the discharge time of the first ground bar 110 from increasing, A second grounding rod 120 for preventing the discharge efficiency of the first grounding electrode 120 from decreasing;
An insulator 130 charged inside the second ground bar 130 to block internal arc discharge of the second ground bar;
A plurality of discharge needles 140 fixed at a predetermined distance in the longitudinal direction of the first ground bar 110 and fixed to the outer surface of the first ground bar 110 in a radial direction;
A lead wire 150 installed at one end or both ends of the first ground rod 110 in the lengthwise direction and electrically connected to facilities on the ground; And
And a welding portion (160) for supporting the discharge needle (140) to be fixed to the outer surface of the first ground bar (110)
The first ground bar 110 and the second ground bar 120 and the insulator 130 are connected to each other by pulling out the first and second ground rods 110 and 120 and the insulator 130 to reduce the contact resistance and improve the discharge efficiency Wherein the upper electrode is closely fixed by drawing.
delete The method according to claim 1,
Wherein the discharge needle (140) is fixed through spot welding.
The method according to claim 1,
Wherein the first ground bar (110) is stainless steel, and the second ground bar (120) is any one of aluminum, an aluminum alloy, or a metallic material having an electric conductivity of a predetermined value or more.
A method of manufacturing an improved needle electrode rod,
a) the first ground bar 110 is closely contacted with the first ground bar 110 to prevent the discharge time of the first ground bar 110 from increasing, and the discharge efficiency of the first ground bar 110 decreases And an insulator 130 for blocking the generation of internal arc discharge of the second ground bar is inserted into the second ground bar 120 to assemble the needle electrode 100 step;
b) a needle electrode 100 having the first and second ground rods 110 and 120 and the insulator 130 inserted therein is passed through a die having a diameter smaller than the diameter of the first ground bar 110, And reducing the contact resistance between the first and second ground rods (110, 120) and the insulator (130) and improving the discharge efficiency;
c) cutting the drawn needle electrode bar 100 at regular intervals;
d) welding a plurality of discharge needles (140) in a radial direction to the outside of the needle electrode (100) while keeping a predetermined distance in the longitudinal direction of the cut needle electrode (100); And
and e) connecting the lead wire (150) for connecting to ground facilities at least one side of the needle electrode (140) in the longitudinal direction of the needle electrode rod (100) to which the discharge needle (140) is welded.
6. The method of claim 5,
Wherein the discharge needle (140) is fixed through spot welding.

Images