KR101470567B1 - Structure for preventing falling of thunderbolt in electric power transmission tower - Google Patents

Abstract

The present invention relates to a structure for preventing lightning in an electric power transmission tower. The structure for preventing lightning in an electric power transmission tower includes an electric power transmission tower vertically installed on a ground; a ground plate laid underground under the electric power transmission tower; an insulation casing fixed to a top end of the electric power transmission tower and configured by an insulator; an insulation gas tank eccentrically inserted into the insulation casing; an insulation material eccentrically inserted between an inner peripheral surface of the insulation casing and an outer peripheral surface of the insulation gas tank; a lightning guide part disposed in a upward direction of the electric power transmission tower and including a bottom end formed through top ends of the insulation casing and the insulation gas tank inside the insulation gas tank; a ground guide part including a top end formed through bottom ends of the insulation casing and the insulation gas tank inside the insulation gas tank; and a connector to connect a bottom end of the lightning guide part to a top end of the ground guide part inside the insulation gas tank. A connection part between a bottom end of a lightning guide bar and a top end of a ground cable connected by the connector is disposed inside the insulation gas tank which is filled with SF6 having excellent insulation and arc properties. The insulation gas tank is configured to be insulated by the insulation material and the insulation casing so that the lightning guide bar and the ground cable may be clearly insulated from a lightning conductor into which lightning is introduced with respect to the electric power transmission tower. Accordingly, when the lightning is grounded through the lightning conductor, the lightning guide bar, and the ground cable, the light may be clearly prevent from being flown through the electric power transmission tower. As a result, walkers or workers around the electric power transmission tower may be protected from a lightning accident.

Description

[0001] The present invention relates to an electric power transmission tower,

[0001] The present invention relates to a lightning prevention structure for a transmission tower, and more particularly, to a structure in which a lightning rod and a conductor can be installed in a sufficiently insulated state with respect to a transmission tower, and in a whole insulation path from a lightning rod to a ground line So that the lightning strike can be prevented from flowing along the transmission tower so as to reliably prevent a lightning accident to a pedestrian or a worker around the transmission tower.

In general, lightning is a phenomenon in which enormous electrical energy generated by static electricity is discharged to the earth's surface due to the flow of an active air current.

In order to prevent various damage caused by lightning, various lightning rods are used in order to discharge electric current such as lightning to the ground such as power transmission tower, transmission / reception tower for broadcasting communication, power generation or substation equipment, military base (laser base), high- Respectively.

As shown in FIG. 5, when the lightning strike T enters the power transmission tower 1, the lightning prevention device installed on the transmission tower is not affected by the transmission work lines L1 and L2, (L3, L4) are provided on the upper portion of the power transmission tower 1 so that the lightning stroke T is eliminated through the ground wire 2 embedded in the ground wire 2.

However, when a lightning stroke T occurs in the vicinity of the transmission tower 1, the lightning stroke T is extinguished (discharged) through the grounding line 2 of the transmission tower 1 and the ground G, , L2), the lightning stroke T directly flows to the steel structure of the power transmission tower 1 in which rainwater flows or flows down. As a result, a pedestrian or a worker who travels around the transmission tower 1 at the moment of occurrence of a lightning stroke (T) is seriously injured due to a lightning accident.

Also, as a conventional prior art, a Korean Utility Model No. 10-2009-0019946 (published on Feb. 26, 2009) discloses a power transmission tower in which a power cable connected to a ground line buried in the ground is extended to the upper portion; A lightning rod for guiding lightning striking the power transmission tower to the power cable; An insulator housing including an inner casing on which the lightning rod is mounted on an upper portion thereof and an engaging hole through which conductors to be connected conductively connected to the lightning rod are inserted and an outer casing integrally formed so as to be spaced apart from the outer portion of the inner casing; And a holder having a through hole formed at the center thereof so as to allow the conductor to be conductively connected to the power cable to pass therethrough, the holder being mounted to the power transmission pylon and fixing the lower end of the inner casing, And a lightning strike processing apparatus for a transmission line structure that can protect a worker from a lightning accident.

However, the "lightning strike apparatus for transmission line structure" of the above-mentioned patent publication has a structure in which a casing made of a polymer insulator, which is made up of an inner casing having a coupling hole and an outer casing integrally formed on the outer side of the inner casing, The lightning rod, the conductor, and the electric cable are connected to each other by inserting a conductor into the coupling hole of the inner casing to connect the lightning rod to the upper end of the conductor and connecting the ground wire buried in the ground to the lower end of the conductor, As shown in FIG.

However, since a casing made of a polymer insulator is simply used to install the lightning rod and the conductor in an insulated state in the transmission tower, not only the insulation between the conductor and the transmission tower is insufficient, Since some of the lightning strikes through the atmosphere, lightning strikes through the lightning rod and discharges to the ground wire through the conductor and the electric cable, so that insulation between the exposed part of the conductor and the transmission tower is not made. The lightning strikes the pedestrians or the workers around the power transmission towers can not be surely prevented.

Therefore, the lightning rod and the conductor can be installed in a sufficiently insulated state with respect to the power transmission tower, and the insulation state between the transmission tower and the power transmission tower can be sufficiently maintained throughout the entire discharge path from the lightning rod to the ground line, It is necessary to develop a lightning prevention structure of a power transmission pylon so as to reliably prevent a lightning accident for a pedestrian or a worker around the pylon.

Korean Patent Publication No. 10-2009-0019946 (2009.02.26. Published) "Lightning Management System of Transmission Line Structure"

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a lightning arrestor capable of providing a lightning rod and a conductor in a sufficiently insulated state with respect to a transmission tower, and to sufficiently maintain insulation between the lightning rod and the transmission tower, So that a lightning accident for a pedestrian or a worker around the power transmission tower can be reliably prevented.

In order to achieve the above-mentioned object, the present invention provides a power transmission tower comprising: a power transmission tower vertically installed on the ground; A ground plate buried in the lower ground of the transmission tower; An insulated casing fixed to an upper end of the transmission tower; An insulating gas tank inserted into the insulating casing so as to be concentric with the insulating casing; An insulating material inserted in a concentric manner between an inner circumferential surface of the insulating casing and an outer circumferential surface of the insulating gas tank; A lightning inducing means located above the power transmission tower and passing through an upper end of an insulating casing and an insulated gas tank and having a lower end located inside the insulated gas tank; A grounding induction unit passing through the lower end of the insulating casing and the insulating gas tank and having an upper end positioned inside the insulating gas tank; And connecting means for connecting the lower end of the lightning stroke inducing means and the upper end of the grounding inducing means within the insulating gas tank; And,

Wherein the insulating casing comprises a cylindrical casing main body made of an insulator and vertically fixed by a mounting bracket to an upper end of a transmission tower, and upper and lower end casing sealing plugs sealing upper and lower ends of the casing main body,

Wherein the insulated gas tank comprises a cylindrical gas tank main body inserted into the casing main body so as to be concentric with the casing main body, upper and lower end gas tank sealing plugs sealing upper and lower ends of the gas tank main body, and a space formed by the gas tank main body and the gas tank sealing plug And a check valve for gas injection for injecting SF6 gas buried in a peripheral wall of the casing main body,

Wherein the insulating material has a cylindrical shape in which an outer circumferential surface is in close contact with an inner circumferential surface of the casing body and an inner circumferential surface thereof is in close contact with an outer circumferential surface of the gas tank body,

Wherein the lightning induction means comprises a lightning rod positioned above the power transmission tower and a light emitting diode connected to the lower end of the lightning rod and penetrating the upper casing sealing plug of the insulating casing and the upper gas tank sealing plug of the insulating gas tank, And a lightning induction rod disposed in the light-

Wherein the grounding guiding means includes a grounding cable whose lower end is connected to the grounding plate and whose upper end penetrates the lower casing sealing plug of the insulating casing and the lower end gas tank sealing plug of the insulated gas tank, And,

Wherein the connecting means comprises a connecting portion formed by cutting the lower end of the lightning stroke inducing rod into a semicircular section so as to have a joining surface and a connecting portion formed so as to have a joining surface joined to the joining surface by cutting the upper end of the grounding cable into a semi- A connecting bolt passing through the connecting portion 83, and a connecting nut fastened to the connecting bolt.

According to the present invention, a power transmission tower installed vertically on the ground; A ground plate buried in the lower ground of the transmission tower; An insulated casing fixed to an upper end of the transmission tower; An insulating gas tank inserted into the insulating casing so as to be concentric with the insulating casing; An insulating material inserted in a concentric manner between an inner circumferential surface of the insulating casing and an outer circumferential surface of the insulating gas tank; A lightning inducing means located above the power transmission tower and passing through an upper end of an insulating casing and an insulated gas tank and having a lower end located inside the insulated gas tank; A grounding induction unit passing through the lower end of the insulating casing and the insulating gas tank and having an upper end positioned inside the insulating gas tank; And connecting means for connecting the lower end of the lightning stroke inducing means and the upper end of the grounding inducing means within the insulating gas tank; And the connection portion between the lower end of the lightning stroke induction rod connected by the connecting means and the upper end of the grounding cable is located inside the insulated gas tank filled with the SF6 gas excellent in insulation property and loneliness, The lightning induction rod and the grounding cable from the lightning rod into which the lightning impulse is inserted can maintain a reliable insulation state with respect to the transmission tower, and thus the lightning stroke is grounded through the lightning rod, the lightening induction rod and the grounding cable It is possible to reliably prevent the lightning from flowing through the transmission tower, and as a result, the walker or the operator around the transmission tower will not be subjected to a lightning accident.

1 to 4 show a preferred embodiment of a lightning prevention structure of a power transmission tower according to the present invention,
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a state in which a lightning prevention structure of a transmission tower of the present invention is installed on a transmission tower;
2 is an exploded perspective view,
3 is a perspective view,
4 is a vertical cross-sectional view showing a state in which it is installed on a transmission tower;
5 is a front view showing a structure for preventing lightning of a conventional power transmission tower.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a lightning prevention structure of a power transmission tower according to the present invention will be described in detail with reference to the accompanying drawings.

The lightning prevention structure of the transmission tower according to the present embodiment includes a transmission tower 10 vertically installed on the ground; A ground plate (20) buried in the lower ground of the transmission tower (10); An insulating casing 30 fixed to the upper end of the transmission tower 10 and made of insulators; An insulated gas tank (40) inserted into the insulated casing (30) so as to be concentric with the insulated gas tank (40); An insulating material 50 inserted in a concentric manner between the inner circumferential surface of the insulating casing 30 and the outer circumferential surface of the insulating gas tank 40; A lightning induction means 60 located above the power transmission pylon 10 and passing through an upper end of the insulated casing 30 and the insulated gas tank 40 and having a lower end located inside the insulated gas tank 40; A grounding induction means (70) passing through the insulation casing (30) and the lower end of the insulation gas tank (40) and having an upper end located inside the insulation gas tank (40); And connecting means (80) for connecting the lower end of the lightning induction means (60) and the upper end of the grounding induction means (70) inside the insulating gas tank (40); .

The power transmission pylon 10 includes a pylon body 11 and an arm 12 horizontally installed on the pylon body 11 and supporting the pylons L1 and L2 in an insulated state.

The steel tower main body 11 includes four ground fixing corners 11a fixed to the ground and a ground portion 11b connected to an upper end of the ground fixing corners 11 and extending upward.

The ground fixing corner portions 11a are installed at four corners of the square and are fixed to the main body portion 13 made of a concrete block embedded in the ground by an anchor (not shown).

The ground portion 11b is made of a steel structure made of a main plate material, a horizontal material, a work material, an auxiliary material, or the like.

L3 and L4 are connected to the uppermost arm, and the other end of the arm is connected to the other end of the arm, Is supported in an insulated state.

The ground plate 20 is made of a metal plate made of platinum or copper having high conductivity for use in a typical lightning prevention apparatus.

The insulating casing 30 includes a cylindrical casing main body 31 made of an insulator and vertically fixed by a mounting bracket 32 to the upper end of the transmission tower 10, And casing sealing plugs (33, 34).

The mounting bracket 32 is fixed on a connecting plate 15 connecting the horizontal member 14 constituting the upper end of the transmission tower 10.

More specifically, the mounting bracket 32 includes a cylindrical portion 32a that is overlaid on the outer circumferential surface of the lower end portion of the casing main body 31 and a cylindrical portion 32a extending radially from the cylindrical portion 32a, A tightening bolt 35 screwed to the cylindrical portion 32a and having a tip end thereof closely attached to the outer peripheral surface of the casing main body 31 and a fastening bolt 35 fastened to the flange 32b and the connecting plate 15 and the horizontal member 14 and a fixing nut 37 fastened thereto.

A through hole 33a through which a lightning stroke inducing rod 62 constituting a lightning induction means 60 described later is formed is formed in the upper casing sealing plug 33. The lower casing sealing plug 34 is provided with a grounding induction A through hole 33b through which the ground cable 71 constituting the means 70 is passed is formed.

The insulating gas tank 40 includes a cylindrical gas tank main body 41 inserted into the casing main body 31 in a concentric manner and upper and lower end gas tank sealing plugs 43 and 44 for sealing upper and lower ends of the gas tank main body 41 An SF6 gas 42 injected into the space formed by the gas tank main body 41 and the gas tank sealing plugs 43 and 44 and the SF6 gas 42 buried in the peripheral wall of the casing main body 31 And a check valve 45 for injecting gas for injecting the gas.

The upper gas tank sealing plug 43 is provided with a through hole 43a through which the lightning stroke inducing rod 62 constituting the lightning stroke inducing means 60 described later penetrates and the lower stage gas tank sealing plug 44 is provided with a through- A through hole 44b through which the grounding cable 71 constituting the grounding induction means 70 passes is formed.

The upper and lower ends of the gas tank main body 41 are sealed by the upper and lower end gas tank sealing plugs 43 and 44 and the upper and lower ends of the upper and lower gas tank sealing plugs 43 and 43 are sealed by injecting SF6 gas 42 into the insulated gas tank 40. [ The grounding cable 71 is passed through the through hole 44a of the lower end gas tank sealing plug 44 so that the lightning stroke inducing rod 62 penetrates through the through hole 43a, 0.0 > SF6 < / RTI >

The upper and lower ends of the gas tank main body 41 and the upper and lower end gas tank sealing plugs 43 and 44 and the through holes 43a and the lightning induction rods 62 and the through holes 44a ) And the grounding cable (71).

The check valve for injecting gas 45 is a check valve for injecting a common gas or oil, and a detailed description thereof will be omitted.

The outer circumferential surface of the insulating material 50 is in close contact with the inner circumferential surface of the casing body 31 and the inner circumferential surface thereof is in close contact with the outer circumferential surface of the gas tank body 41. As the insulating material 50, an insulating rubber may be used.

In the illustrated example, the insulating material 50 is divided into a plurality (three). It may be composed of a single body.

The lightning induction means 60 includes a lightning rod 61 positioned above the power transmission pylon 10 and connected to the lower end of the lightning rod 61 and connected to the upper casing sealing plug 33 of the insulating casing 30 And a lightning stroke inducing rod 62 penetrating the upper gas tank sealing plug 43 of the insulating gas tank 40 and having a lower end located inside the insulating casing 30. [

The lower end of the lightning rod 61 and the upper end of the lightning stroke inducing rod 62 are integrally joined by welding.

The lower end of the ground inducing means 70 is connected to the ground plate 20 and the lower end casing sealing plug 34 of the insulating casing 30 and the lower end gas tank sealing plug 44 of the insulated gas tank 40 And a grounding cable (71) penetrating through the insulating gas tank (40) and having an upper end positioned inside the insulating gas tank (40).

The covering cable is used for the grounding cable 71 and the covering of the portion connected to the lower end of the lightning stroke inducing rod 62 is peeled off.

The connection means 80 includes a connection portion 81 formed by cutting the lower end of the lightning stroke induction rod 62 into a semicircular cross section and having a joint surface 82 and an upper end of the ground cable 71 in a semi- A connecting portion 83 formed so as to have a joining surface 84 to be joined to the joining surface 82 by cutting and a connecting bolt 85 passing through the joining portions 81 and 83, And a connecting nut 86 to be fastened.

Hereinafter, the lightning strike prevention effect of the lightning prevention structure of the power transmission tower according to the present invention will be described.

The lightning prevention structure of the power transmission tower according to the present invention is constructed such that the insulating casing 30, the insulating gas tank 40, the insulating material 50, the lightning induction means 60 and the grounding induction means 70 are all assembled in the factory, The mounting bracket 32 is fixed to the upper end of the transmission tower 10 with the mounting bolt 36 and the mounting nut 37. [

The lightning induction rod 62 connected to the lightning rod 61 and the lightning induction rod 62 connected to the lightning rod 61 are connected to each other through the lightning rod 61. [ The ground cable 71 connected to the ground cable 71 and the ground plate 20 embedded in the ground and connected to the ground cable 71 are discharged to the ground and discharged (destroyed).

At this time, the connection portion between the lower end of the lightning stroke inducing rod 62 connected by the connecting means 80 and the upper end of the grounding cable 71 is an insulating gas filled with the SF6 gas 42 excellent in insulation property and arc extinguishing property Since the insulated gas tank 40 is insulated by the insulating casing 50 and the insulation casing 50 because the insulated gas tank 40 is insulated by the insulation casing 50 from the lightning rod 61, The grounding cable 71 can maintain a reliable insulation state with respect to the power transmission pylon 10 so that the lightning stroke is grounded through the lightning rod 61, the lightning stroke inducing rod 62, and the grounding cable 71, It is possible to surely prevent the light from flowing through the power transmission tower 10, and as a result, the walker or the worker around the transmission tower 10 will not be subjected to the lightning accident.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

10: Power transmission tower 20: Ground plate
30: insulated casing 31: casing body
32: Mounting bracket 33, 34: Casing sealing plug
40: insulated gas tank 41: gas tank body
42: SF6 gas 43, 44: gas tank sealing plug
50: Insulation material 60: Lightning induction means
61: lightning rod 62: lightning rod
70: grounding induction means 71: grounding cable
80: Connection means

Claims (1)

A power transmission tower 10 installed vertically on the ground; A ground plate (20) buried in the lower ground of the transmission tower (10); An insulating casing 30 fixed to the upper end of the transmission tower 10 and made of insulators; An insulated gas tank (40) inserted into the insulated casing (30) so as to be concentric with the insulated gas tank (40); An insulating material 50 inserted in a concentric manner between the inner circumferential surface of the insulating casing 30 and the outer circumferential surface of the insulating gas tank 40; A lightning induction means 60 located above the power transmission pylon 10 and passing through an upper end of the insulated casing 30 and the insulated gas tank 40 and having a lower end located inside the insulated gas tank 40; A grounding induction means (70) passing through the insulation casing (30) and the lower end of the insulation gas tank (40) and having an upper end located inside the insulation gas tank (40); And connecting means (80) for connecting the lower end of the lightning induction means (60) and the upper end of the grounding induction means (70) inside the insulating gas tank (40); And,
The insulating casing 30 includes a cylindrical casing main body 31 made of an insulator and vertically fixed by a mounting bracket 32 to the upper end of the transmission tower 10, And a casing sealing plug (33, 34)
The insulating gas tank 40 includes a cylindrical gas tank main body 41 inserted into the casing main body 31 in a concentric manner and upper and lower end gas tank sealing plugs 43 and 44 for sealing upper and lower ends of the gas tank main body 41 An SF6 gas 42 injected into the space formed by the gas tank main body 41 and the upper and lower end gas tank sealing plugs 43 and 44 and the SF6 gas 42 buried in the peripheral wall of the gas tank main body 41, And a check valve (45) for gas injection for injecting a gas (42)
The outer surface of the insulating material 50 is in close contact with the inner circumferential surface of the casing body 31 and the inner circumferential surface of the insulating material 50 is in close contact with the outer circumferential surface of the gas tank body 41,
The lightning induction means 60 includes a lightning rod 61 positioned above the power transmission pylon 10 and connected to the lower end of the lightning rod 61 and connected to the upper casing sealing plug 33 of the insulating casing 30 And a lightning induction rod (62) penetrating the upper gas tank sealing plug (43) of the insulating gas tank (40) and having a lower end located inside the insulating casing (30)
The lower end of the ground inducing means 70 is connected to the ground plate 20 and the lower end casing sealing plug 34 of the insulating casing 30 and the lower end gas tank sealing plug 44 of the insulated gas tank 40 And a grounding cable 71 having an upper end positioned inside the insulating gas tank 40,
The connection means 80 includes a connection portion 81 formed by cutting the lower end of the lightning stroke induction rod 62 into a semicircular cross section and having a joint surface 82 and an upper end of the ground cable 71 in a semi- A connecting portion 83 formed so as to have a joining surface 84 to be joined to the joining surface 82 by cutting and a connecting bolt 85 passing through the joining portions 81 and 83, And a connection nut (86) which is fastened to the power transmission tower.

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