JP5968094B2 - Protective device for existing aviation obstacle light and installation method thereof - Google Patents

Description

  The present invention relates to a lightning protection device retrofitted to an aerial obstruction light installed at a high place (hereinafter referred to as a pedestal) of a steel tower or chimney (hereinafter referred to as a steel tower or the like) and a method for installing the same.

  Aviation obstruction lights installed in high places such as steel towers and chimneys (see, for example, Patent Document 1 below) do not have power supply facilities in the vicinity and need to draw a power cable from a distance. Corrugated cables and the like are used so that they can withstand altitude differences and maintain a stable wiring state.

  A corrugated cable is a cable with a corrugated metal tube that is lightweight, strong, and flexible. The corrugated cable is a corrugated metal tube with corrugated corrugated metal wire, and corrosion prevention. The outer seeds are provided from the inside to the outside.

As the protective device, a surge absorber is attached to the aviation obstruction light itself. However, it cannot be denied that the lightning is particularly insufficient for lightning with high energy generated in Hokuriku. Many aviation obstruction lights have been destroyed (in winter when there is a lot of lightning).
Once destroyed, it is relatively difficult to replace, and the aviation obstruction light will stop lighting until the repair and replacement are completed, and the aviation obstruction light will not be able to function for a long time. Considering the life of the lamp, the expected lifetime is no longer allowed.

  Therefore, it is necessary to separately attach a protective device (see, for example, Patent Document 2 below). By constructing a bypass circuit in which a protective device with low insulation is connected in the power supply circuit, and by bypassing the surge current, the surge voltage One of the candidates is a surge protection device (SPD: Surge Protective Device, etc.) that suppresses aviation and protects aviation obstacle lights.

JP 2004-319198 A JP-A-1-59825

However, such a bypass circuit is contrary to the actual situation that it is possible to obtain effectiveness by providing it in the vicinity of the aviation obstacle light to be protected, and in order to fix a separate protection device in a limited top area, Combined with work in high places, it is difficult.
In addition, the wiring of the corrugated cable leading to the top of such a steel tower has almost no extra length, and in addition, the termination on the load side in the existing wiring, combined with the work at high places It was difficult to connect a new wire for the protection device to the part.

  Also, if a large surge current flows into the protective device, the protective device is often destroyed with an explosion, and if the debris is scattered, it is a fallen object from a high place even if it is very small. If this happens, there is a risk of damaging people and equipment.

  The present invention has been made in view of the above circumstances, and can reliably connect a bypass circuit in the vicinity of an aviation obstruction light, which is advantageous for the convenience of fixing to the top of a steel tower or the like, and workability. The purpose of the present invention is to provide a protection device for an existing aviation obstacle light that does not drop even if it is destroyed, and its installation method.

  An apparatus for protecting an existing aviation obstacle light according to the present invention, which has been made to solve the above-described problems, includes a circuit unit having a protection circuit interposed between a power line and a ground line of an existing cable of an existing aviation obstacle light, and the circuit unit. And a bracket for supporting the casing on a gantry to which an existing aviation obstacle light is fixed, the circuit section is detachably provided with a protection circuit, and the casing is resistant to corrosion and resistance. A housing body with impact, a lid that seals the front opening of the housing body, a pull-in hole for drawing in an existing cable, and a lead-out hole for drawing out a relay cable between the existing cable and the existing aviation obstacle light And a vent hole for releasing the internal pressure of the housing is provided downward, and the bracket supports the housing below the existing aviation obstacle light.

In order to solve the above-mentioned problem, the installation method of the existing aviation obstacle light protection device according to the present invention is a method of installing the existing aviation obstacle light protection device according to the present invention, and the driving of the existing aviation obstacle light Removing the power line and ground line of the existing cable from the circuit, drawing the extra length of the existing cable into the housing body from the drawing hole, and attaching the bracket of the protective device for the existing aviation obstacle light to the existing aviation A step of sandwiching and fixing between the obstacle light and the gantry, a step of connecting the power line and the ground line of the extra length of the existing cable to the input terminal of the circuit unit, and a relay cable to the output terminal of the circuit unit And a step of connecting a load-side end portion of the relay cable to a drive circuit of the existing aviation obstacle light.

As described above, according to the protection device for an existing aviation obstacle light according to the present invention, a bypass circuit for connecting a protection device having a relatively low insulating property in the power supply circuit can be provided in the vicinity of the existing aviation obstacle light. As a protection device for existing aviation obstruction lights, extremely high effectiveness can be obtained.
In addition, by adopting a configuration in which the housing is supported below the existing aviation obstacle light in the configuration of the bracket of the protective device, even when a corrugated cable is used as an existing cable reaching the top of a steel tower or the like. However, it is possible to secure a sufficient extra length sufficient to connect to the circuit portion provided with the protection circuit in the protection device, and it becomes easy to retrofit the protection circuit for the existing aviation obstacle light.

In addition, by providing corrosion resistance and shock resistance to the housing, even if a large surge current flows into the protective device and the protective device is destroyed due to an explosion, the debris is scattered from a high place to the surroundings. Without fear, the possibility of damaging people and equipment can be eliminated.
Furthermore, if a vent hole for releasing the internal pressure of the housing is provided, damage to the housing due to such an explosion can be avoided, and an unnecessary burden on cost can be avoided.

  For weather resistance, a structure with a drawing hole for drawing an existing cable, a drawing hole for drawing a relay cable between the existing cable and the existing aviation obstacle light, and a ventilation hole for releasing the internal pressure of the housing downward The effect of blocking the circuit part from wind and rain is enhanced by the above, and furthermore, a sealing material is provided in an openable / closable part or an unnecessary gap, or a heat insulating material is provided to prevent condensation inside the housing. As a result, the weather resistance of the circuit portion is further increased.

On the other hand, according to the installation method of the existing aviation obstacle light protection device according to the present invention, the step of removing the power line and the ground line of the existing cable from the drive circuit of the existing aviation obstacle light, and the extra length portion of the existing cable All of the cables except for the relay cable are inserted into the main body of the casing through the pull-in hole, and the bracket of the protective device for the existing aviation obstacle light is sandwiched and fixed between the existing aviation obstacle light and the mount. The member is carried in and fixed at the work place in the high place, and the remaining is the step of connecting the power line and the ground line of the extra length part of the existing cable to the input terminal of the circuit part, and the relay cable to the output terminal of the circuit part. A process of connecting a power line and pulling it out from the lead-out hole, and a process of connecting the load side end of the relay cable to the drive circuit of the existing aviation obstacle light, which is relatively easy even at high places, part of the member Is in a work place Since most of the work is fixed, it is possible to effectively use both arms of the worker for installation work and securing the body without dropping the member from the work place at high place. There is an effect that the safety of work is improved.

It is the schematic which shows the embodiment example of the protection apparatus of the existing aviation obstacle light by this invention. BRIEF DESCRIPTION OF THE DRAWINGS (A): A side view which shows an example of the protection apparatus of the existing aviation obstruction light by this invention: (B): The front view except the cover. BRIEF DESCRIPTION OF THE DRAWINGS (A): Plan view, (B): Front view, (C): Bottom view showing an example of an existing aircraft obstacle light protection device according to the present invention. It is a circuit diagram which shows the wiring state of the circuit part of the protection apparatus of the existing aviation obstacle light by this invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an existing aviation obstacle light protection device and its installation method according to the present invention will be described below with reference to the drawings.
FIG. 1 is an example of an existing aviation obstacle light X, and includes a light source unit x1 and a base x2.
The light source unit x1 includes a light source such as an LED and a lens surrounding the light source, and the base x2 includes a frame that supports the light source unit x1 and a drive circuit, and a fixing plate x3 that is fixed to the gantry Z.

  The drive circuit includes a power supply unit that takes in power from a power supply facility, a control unit that controls turning on and off of the light source, and blinking control, and a protection unit that includes a surge absorber that protects these from a surge current (illustrated). (Omitted).

  The existing aviation obstruction light X is mounted on a gantry Z with a fixing plate x3, fixed integrally with a bolt B inserted into a through hole x4 provided on both, and pulled from a ground power supply facility. A corrugated cable (existing cable Y) containing the power line y1 and ground line y2 is drawn into the frame and connected to the drive circuit.

The protection device according to the present invention is attached to the existing aircraft obstacle light X.
The protection device shown in FIGS. 2 to 4 has the existing cable Y of the existing aviation obstacle light X while ensuring the connection of the existing cable Y to the power supply unit, the control unit, and the protection unit of the existing aviation obstacle light X. A circuit part 1 for interposing a protection circuit between the power line y1 and the ground line y2, a housing 2 incorporating the circuit part 1, and a gantry Z to which the existing aircraft obstacle light X is fixed. A bracket 3 to be supported is provided.

The circuit unit 1 in the example includes a protection circuit (SPD) 6 in a detachable manner, and is drawn out from an input terminal that connects the power line y1 and the ground line y2 of the existing cable Y, and the lead hole 2d. An output terminal for connecting a power line of the relay cable 4 and a socket 7 to which a plurality of (three in this example) protection circuits 6 can be attached and detached are provided. The two protection circuits 6 and 6 are connected between the power supply line y1 and the ground line y2 of the existing cable Y that connects the power supply facility and the existing aircraft obstacle light X, and one protection circuit 6 constitutes the power supply line y1. Connected between two wires (see FIG. 4).

The casing 2 in this example is made of a metal such as stainless steel having corrosion resistance and impact resistance, and seals a rectangular parallelepiped casing main body 2a whose front surface is open and a front opening of the casing main body 2a. A lid 2b is provided.
The housing body 2a includes a top plate, a back plate, a lower plate, left and right side plates, and a hanging plate that hangs downward from a front edge of the lower plate.

The lower plate of the housing main body 2a has a drawing hole 2c for drawing the existing cable Y, a drawing hole 2d for drawing the relay cable 4 connected to the output terminal of the circuit unit 1, and a vent hole for releasing the internal pressure of the housing 2. 5 is provided.
The pull-in hole 2c and the pull-out hole 2d include a support member 14 that supports the existing cable Y and the relay cable 4 that are pulled in by sandwiching them.
The vent hole 5 is used to relieve the pressure when the protection circuit 6 is damaged by lightning and the pressure in the housing body 2a suddenly increases.
The back plate of the housing main body 2 a includes through holes for fixing the four corners of the substrate 12 constituting the circuit unit 1. The substrate 12 is fixed to the back plate with bolts 13 attached to the through holes of the back plate. At that time, a spacer (not shown) is attached to the bolt 13 so as to be separated from the back plate by a certain distance. .

The lid 2b is supported by a hinge 8 fixed to the front edge of the top plate, and opens and closes. The back surface of the lid 2b is in close contact with the front edges of the top plate, the lower plate, and the left and right side plates, and the surface of the vertical plate. A sealing member (rubber, elastomer, etc.)
In the closed state of the lid 2b, a bolt 11 is inserted into the through-hole 9 formed in the lower part of the lid 2b and the through-hole 10 provided in the hanging plate so as to face the through-hole 9, and the nut is tightened. To maintain by.

The bracket 3 is formed by bending a single plate body into an L-shape, thereby holding the holding portion 3a associated with the gantry Z on which the existing aircraft obstacle light X is installed, and a support portion depending from the leading edge of the holding portion 3a. 3b is provided integrally. Adopting this structure, the supporting part 3b and the back plate of the casing body 2a are integrally connected by bolts and nuts 15 to support the casing 2 below the existing aviation obstacle light X. can do.
On the other hand, the sandwiching portion 3a includes two or more through holes x4 each facing a through hole formed in the fixed plate x3 of an existing aircraft obstacle light.

  The protection device for the existing aviation obstacle light according to the present invention is configured as described above, the bolt B for setting the existing aviation obstacle light is removed, and the clamping portion 3a is inserted between the fixing plate x3 and the gantry Z to fix the fixing plate. It is clamped between x3 and the mount Z, and bolts B are inserted into through holes provided in the three parties (fixing plate x3, holding section 3a, and mount Z), and fixed by tightening with nuts. To do.

The protection device for the existing aviation obstruction light according to the present invention is configured as described above, the detaching step of removing the power line y1 and the ground line y2 of the existing cable Y from the drive circuit of the existing aviation obstruction light X, and the existing aviation obstruction light And the separation step of disconnecting the frame Z, the extra length portion of the existing cable Y is drawn into the housing body 2a from the drawing hole 2c, and the bracket 3 of the protective device for the existing aviation obstacle light X is A reconnection step of sandwiching and fixing between the existing aviation obstruction light X and the gantry Z, connecting the power line y1 and the ground line y2 of the extra length of the existing cable Y to the input terminal of the circuit unit 1, An extension step of connecting the power line of the relay cable 4 to the output terminal of the circuit unit 1 and pulling it out from the lead-out hole 2d, and reconnection for connecting the load side end of the relay cable 4 to the drive circuit of the existing aviation obstacle light X By going through the process, The casing main body 2a having a built-in circuit unit 1 can be installed in a state of being suspended to a lower than gantry Z.

In the reconnection step, the upper end portion of the corrugated cable as the existing cable Y is drawn into the housing body 2a from the drawing hole 2c.
In the extension step, the lower end portion of the extra length portion drawn into the housing main body 2a is fixed by the support member 14, and then the corrugated metal tube of the extra length portion is removed, and the power supply line y1 and the ground line y2 are removed from the inside. Is connected to the input terminal of the circuit unit 1, and the relay cable 4 is connected to the output terminal on the load side through the protection circuit 6 and pulled out through the lead-out hole 2d.
In the reconnection process, the relay cable 4 drawn out from the drawer hole 2d is connected to the existing aviation obstacle light X.

  The existing aviation obstruction light X and the protection circuit 6 are sufficiently close to each other so that an effective protection function against lightning strikes works due to the structure of the protection device and the installation method. By interposing the relay cable 4, unlike the corrugated cable used as the existing cable Y, the relay cable 4 can be used by being appropriately cut to a required length.

B bolt,
X existing air traffic light, x1 light source, x2 base, x3 fixing plate, x4 through hole,
Y Existing cable, y1 power line, y2 ground line,
Z frame,
1 circuit part,
2 housing, 2a housing body, 2b lid, 2c lead-in hole, 2d lead-out hole,
3 bracket, 3a clamping part, 3b support part,
4 relay table, 5 vents, 6 protection circuit, 7 socket,
8 hinges, 9 through holes, 10 through holes, 11 bolts, 12 substrates, 13 bolts,
14 support members, 15 bolts and nuts,

Claims (2)

A circuit part (1) for interposing a protective circuit (6) between a power line (y1) and a ground line (y2) of an existing cable (Y) of an existing aviation obstacle light (X);
A housing (2) containing the circuit unit (1);
A bracket (3) for supporting the housing (2) on a gantry (Z) to which an existing aviation obstacle light (X) is fixed;
The circuit unit (1) includes a protection circuit (6) in a detachable manner,
The case (2) includes a case main body (2a) having corrosion resistance and impact resistance, and a lid (2b) for sealing a front opening of the case main body (2a). A drawing hole (2c) for drawing (Y), a drawing hole (2d) for drawing out the relay cable (4) between the existing cable (Y) and the existing aviation obstacle light (X), and a housing (2) A vent hole (5) for releasing the internal pressure is provided downward,
The bracket (3) supports the casing (2) below the existing aviation obstacle light (X), and protects the existing aviation obstacle light. A method of installing the protective device for the existing aviation obstacle light (X) according to claim 1,
Removing the power line (y1) and the ground line (y2) of the existing cable (Y) from the drive circuit of the existing aviation obstacle light (X);
Unlinking the existing aviation obstruction light (X) and the gantry (Z);
The extra length of the existing cable (Y) is drawn into the housing body (2a) from the drawing hole (2c), and the bracket (3) of the protective device for the existing aviation obstacle light (X) is attached to the existing aviation. Sandwiching and fixing between the obstacle light (X) and the gantry (Z);
Connecting the power source line (y1) and the ground line (y2) of the extra length part of the existing cable (Y) to the input terminal of the circuit part (1);
Connecting the power line of the relay cable (4) to the output terminal of the circuit part (1) and pulling it out from the lead-out hole (2d);
A method of installing a protective device for an existing aviation obstacle light, comprising a step of connecting a load side end of the relay cable (4) to a drive circuit of the existing aviation obstacle light (X).

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