JP7405348B2 - lightning suppression device - Google Patents

Description

The present invention relates to a lightning strike suppression device for protecting a protected object from lightning damage by suppressing lightning strikes.

Lightning is an electrical discharge phenomenon that occurs in the atmosphere, and lightning discharges include intracloud discharge, intercloud discharge, and cloud-ground discharge. Cloud-ground discharge (hereinafter referred to as lightning) causes the most damage from lightning discharges. A lightning strike is a phenomenon that occurs when the electric field between a thundercloud (cloud base) and the earth or a structure built on the earth becomes extremely strong, and the electric charge reaches a saturated state, destroying the insulation of the atmosphere. be.

A closer look at the phenomenon of lightning shows that in the case of summer lightning, which typically occurs during the summer, when a thundercloud matures, a step leader approaches the ground from the thundercloud, selecting areas where atmospheric discharge is likely to occur.
When the step leader reaches a certain distance from the ground, an upward streamer of weak current (welcome discharge) extends from the ground, buildings (lightning rods), trees, etc. toward the step leader.
When this streamer and step leader are combined, a large current (return current) flows between the thundercloud and the ground through that path.
This is the lightning phenomenon.

In response to this type of lightning phenomenon, most conventional lightning protection concepts have been based on the idea that lightning cannot be prevented, so lightning is caught by a lightning rod (Franklin rod) and directed to the ground.

In response to this, the present inventors proposed a lightning strike suppression device disclosed in Patent Document 1, in order to protect the object to be protected by suppressing the occurrence of lightning strikes as much as possible.

This lightning suppression device has an upper electrode body and a lower electrode body disposed with an insulator in between, and is constructed by grounding only the lower electrode body.

For example, when a thundercloud with negative charges distributed at the bottom of the cloud approaches, the opposite charge (positive charge) is distributed on the surface of the earth, and positive charges also collect on the grounded lower electrode body.

Then, the upper electrode body disposed through the insulator becomes negatively charged due to the action of the capacitor.

This action makes it difficult for upward streamers to occur in the lightning arrester and its surroundings, thereby suppressing the occurrence of lightning strikes.

By the way, the lightning strike suppression device proposed above fixes the electrode body to the tip of a support, attaches this electrode together with the support to an existing building or a newly constructed support structure, and further fixes the support to the support structure. It is installed by being grounded using a grounding wire installed in the building or support structure mentioned above.

In this way, when installing using an existing building, it is necessary to fix the supports to the building, and when using a newly constructed support structure, it is necessary to fix the supports to the building. Construction work of the structure and work of fixing columns to this support structure are required, and in both cases, work of laying a grounding wire for grounding the electrode body is further required.

As described above, when installing a lightning strike suppression device, the installation work requires many steps, making the work complicated.

Further, the installation position is restricted by the position of the building or the position of the support structure, and furthermore, the removal work is complicated, so that after installation, the structure becomes almost permanent.

The present inventors discovered the problems remaining in the conventional art and arrived at the present invention.

The present invention has been made based on the above-mentioned findings, and an object to be solved is to provide a lightning strike suppression device that increases the degree of freedom in installation location and is easy to install and remove.

The method for installing a lightning strike suppression device of the present invention has been made to solve the above-mentioned problems, and is characterized by including the following steps 1) to 4).
1) A step of storing a lightning strike suppression device main body, which constitutes a main part that suppresses lightning strikes, and a support that supports this lightning strike suppression device main body in a base body made of a conductive material.
2) A step of transporting the base body in which the lightning strike suppression device main body and the pillar are stored to an installation location.
3) Fixing the base to the ground.
4) A step of erecting and fixing the pillar to which the lightning suppression device body is attached to the base body to maintain the lightning suppression device body at a predetermined height from the ground.
5) electrically connecting the base to ground;

According to this installation method, first, the main body of the lightning suppression device, which constitutes the main part that suppresses lightning strikes, and the support that supports the main body of the lightning suppression device are stored in the base body, and then the base body is transported to the installation position. By doing so, the lightning strike suppression device can be placed at the desired installation location.

Next, the base is fixed to the ground, and the lightning suppressor main body and the support are taken out from the base, and the support is erected and fixed on the base with the lightning suppressor main body facing upward.

Thereby, the main body of the lightning strike suppression device can be maintained at a predetermined height at the installation position.

Next, by electrically connecting the base body to the ground, the lightning strike suppression device main body is electrically connected to the ground via the support and the base body, thereby completing the installation of the lightning strike suppression device.

As described above, according to the method for installing a lightning strike suppression device of the present invention, installation is possible regardless of the presence or absence of a support structure at the installation location.
Further, the installation work can be concentrated into work at a low place above the ground, making the installation work easier and simpler.

In addition, the lightning suppression device of the present invention includes a pillar on which the lightning suppression device main body is attached, a transportable base on which the pillar is erected and fixed, and a fixing means provided on the base for fixing the base on the ground. and a grounding means for electrically connecting the base body and the ground, and the base body includes a storage part in which the lightning strike suppression device main body and the support column are stored during transportation, and a storage part in which the support support is erected and fixed. The present invention is characterized in that the base body and the support pillar are formed of an electrical conductor.

With this configuration, the lightning suppression device main body and the support can be stored in the storage section provided in the base, which allows the lightning suppression device to be compactly integrated and facilitates the transportation work of the lightning suppression device. It can be made into something.

The fixing means provided on the base allows the base to be fixed to the ground.
Thereby, the base body can be quickly fixed after being transported to the installation location.

Furthermore, after removing the lightning suppression device main body and the support from the fixed base and assembling them, the lightning suppression device main body can be maintained at a predetermined height above the ground by erecting and fixing them to the support of the support of the base. I can do it.

Thereby, the installation work of the lightning suppression device main body can be concentrated into work at a low place on the ground, and the installation work can be made simple and safe.

Further, by electrically connecting the fixing means for fixing the base to the ground with the ground using the grounding means, it is possible to reliably electrically connect the support, the base, and the fixing means to the ground.
Thereby, electrical connection between the main body of the lightning strike suppression device and the ground can be reliably established.

Therefore, according to the lightning strike suppression device of the present invention, the method for installing a lightning strike suppression device according to claim 1 can be effectively carried out.

As described above, according to the present invention, the degree of freedom in the installation position of the lightning strike suppression device can be increased, and the installation work can be performed safely and easily.

FIG. 1 is a plan view of an apron to which an embodiment of the present invention is applied. 1 is a longitudinal sectional view of a main body of a lightning strike suppression device used in an embodiment of the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 3 is a longitudinal cross-sectional view of a connecting portion of a support column according to an embodiment of the present invention. It is a longitudinal cross-sectional view of the support|pillar connection part of other embodiment of this invention. FIG. 7 is a longitudinal cross-sectional view of a strut connection portion according to still another embodiment of the present invention.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
In this embodiment, as shown in FIG. 1, an example is shown in which the present invention is applied to a parking lot B where an airplane A is stored in an exposed state.

On the apron B, an arbitrary number of airplanes A are parked in the parking space in a substantially lined up state, and the lightning strike suppression device Z of this embodiment is installed at a position that effectively protects these airplanes A from lightning strikes. has been done.

This lightning suppression device Z includes a movable base 50, a lightning suppression device main body 1 which is installed inside the base 50 to form a negative charge area, and the base 50 is fixed to the ground D and electrically connected to the ground D. and a fixing means E.

First, the lightning strike suppression device main body 1 will be described in detail with reference to FIG. 2.
A lightning strike suppression device main body 1 of the present embodiment includes a first electrode body 2 formed in a spherical shell shape from a conductive material, and is provided so as to wrap around the first electrode body 2 with a predetermined gap G therebetween. a second electrode body 3; an electrical insulating layer S provided in the gap G and keeping the second electrode body 3 and the first electrode body 2 in an electrically insulated state; The support 5 is connected to the electrode body 3 in an electrically conductive state.

A nut 4 is integrally attached to the lower part of the first electrode body 2, and the tip of the support column 5 is screwed into the nut 4.
A lock nut 6 is screwed onto the column 5, and the lock nut 6 is pressed against the fixing nut 4, thereby fixing the column 5 and the second electrode body 2.

The second electrode body 3 is constituted by a pair of second electrode structures 3a and 3b that are vertically divided into two parts.
These pair of second electrode structures 3a and 3b are butted against each other so as to sandwich the first electrode body 2 therebetween, and are integrated by welding (welding portion W) at this butted portion.

A through hole 7 is formed in the center of the lower part of the second electrode assembly 3a, and the inside and outside of the second electrode assembly 3a are connected to each other. The first electrode body 2 is connected to the ground through the support 5 .

The electrically insulating layer S is arranged in the gap G and includes a spacer 8 formed of an electrically insulating material that holds the first electrode body 2 and the second electrode body 3 at a predetermined distance, and the first electrode body 2 and the spacer 8 formed of an electrically insulating material. It is constituted by the gap G that forms a space between the second electrode bodies 3.

In the present embodiment, the spacer 8 includes a lower spacer 8a placed below the first electrode body 2 and an upper spacer 8b placed above the first electrode body 2.

The lower spacer 8a is shaped to fit into the through hole 7 of the lower second electrode assembly 3a and to come into surface contact with the lower inner surface of the second electrode assembly 3.
The lower spacer 8a and the lower second electrode structure 3a are integrated with adhesive or the like.

A support 5 is passed through the center of the lower spacer 8a, and the support 5 is maintained at a predetermined distance from the second electrode structure 3a below by the lower spacer 8a and is electrically insulated. are connected with.

The upper spacer 8b is formed into a spherical shape with a lower surface along the outer surface of the first electrode body 2 and an upper surface along the inner surface of the second electrode body 3. A positioning protrusion 10 that is fitted into a locking hole 9 formed in the upper part of the body 2 is provided in a protruding manner.

The upper spacer 8b is also fixed to the first electrode body 2 and the second electrode body 3 with an adhesive or the like.

Furthermore, in this embodiment, the support column 5 is constituted by a plurality of support structure bodies 5a and 5b, which are connected in the axial direction using a connection means 51, which will be described later, to have a predetermined length.

As shown in FIG. 8, the connecting means 51 includes an outer flange 51a provided on the end surface of the connecting side of each column structure 5a, 5b, and an outer flange 51a provided on both column structures 5a, 5b. and bolts and nuts 51b that fasten them together.

The base body 50 has rolling elements 52 such as wheels attached to its lower sides on both sides so as to be able to be towed, and the lightning suppression device body 1 and the strut structures 5a and 5b are stored in the upper part. A storage section F is provided, and a column support section H to which the column 5 is fixed is provided.

Further, a connecting hook 53 is provided on the side of the base body 50, and the base body 50 is connected to a tow vehicle or the like via this connecting hook 53.

In this embodiment, the fixing means E is constituted by outriggers installed at the four corners of the base 50.

As shown in FIGS. 3 to 7, this fixing means E includes a first cylinder 54 that is provided at the four corners of the base body 50 and moves the base body 50 up and down, and a first cylinder 54 that moves the first cylinder 54 into and out of the side of the base body 50. The second cylinder 55 is configured with a second cylinder 55.

Further, the fixing means E is placed on the ground D and includes a plurality of stabilizing plates 56 on the upper surface of which the first cylinder 54 is fixed in pressure contact, and as shown in FIG. 3, these stabilizing plates 56 are in a stacked state and is stored on the base body 50. The first cylinder 54 and the stabilizing plate 56 are configured to be able to be fixed together by fastening means such as bolting.

When these stabilizers 56 are installed on the ground, the first cylinder 54 is brought into pressure contact with the upper surface thereof, thereby increasing the contact area between the first cylinder 54 and the ground D. The posture of the first cylinder 54 is stabilized, and the electrical connection between the first cylinder 54 and the ground D is made good.
The first cylinder 54 supports the weight of the vehicle and applies pressure to the ground through the stabilizing plate 56, and since the first cylinder 54 and the stabilizing plate 56 are mechanically locked, it performs the following functions. When the trailer body tilts due to gusts of wind, etc., the weight of the stabilizer plate acts as a "weight" to prevent the vehicle body from floating due to the wind. It has two functions: it ensures good electrical continuity with the ground through its contact area and installation pressure, and it acts as a "weight" to prevent the vehicle from floating.
Furthermore, by electrically connecting the stabilizing plates 56 to each other with six cables, the grounding areas of the four plates have the same potential, thereby improving the grounding effect.

In the present embodiment, the column support portion H is a column mounting plate that is configured to be able to swing between a collapsed state in which it is superimposed on the upper surface of the base body 50 and an upright state in which it is oriented upwardly. It is equipped with 57.

The strut mounting plate 57 is configured such that the strut 5 is vertically fixed to the upper surface thereof in the collapsed state, and is also fixed to the base body 50 in the tilted state.

Further, in this embodiment, an upright mechanism I is provided near the column support section H, which is connected to the column 5 fixed to the column mounting plate 57 and raises the column 5 upward.

This erecting mechanism I includes a boom 58 that is swingably provided on the base 50, an auxiliary boom 59 that holds the boom 58 in an erect state on the base 50, and a winding that is attached to the center of the swing of the boom 58. It is composed of an upper machine 60 and a wire 61 that is stored in the hoist 60 in a wound state and is inserted through the tip of the boom 58.

The auxiliary boom 59 is swingably attached to the intermediate portion of the boom 58 in the longitudinal direction, and its swinging end is engaged with the base 50, so that the boom 58 is placed in an upright state with respect to the base 50. It is designed to be held in place.

Further, as shown in FIG. 6, the wire 61 is configured such that its tip end is inserted through the tip end of the boom 58 and then detachably connected to the intermediate portion of the support column 5.

Next, a procedure for installing the lightning strike suppression device Z of this embodiment configured as described above and an installation method will be described.

First, the base body 50 is towed to the installation position by a towing vehicle.
Here, the lightning suppression device Z can be transported with the lightning suppression device main body 1 and the support column 5 stored in the storage section F provided in the base body 50.
As a result, the lightning strike suppression device can be integrated into a compact unit, and the work of transporting the lightning strike suppression device can be made smooth.

Next, the second cylinder 55 constituting the fixing means E is actuated to move the first cylinder 54 outward from the side of the base body 50.

From this, by taking out the stabilizer 56 stored on the base 50 and placing it below the first cylinder 54, the first cylinder 54 is extended and its lower end is brought into pressure contact with the stabilizer 56. , the base 50 is lifted off the ground D.

In this state, the first cylinder 54 is brought into contact with the ground D via the wide area of the stabilizing plate 56, so that the first cylinder 54 is held in a stable state and electrically connected to the ground D.

Next, as shown in FIG. 4, after taking out the pillar structures 5a and 5b stored in the base 50, as shown in FIG. These pillar structures 5a and 5b are coaxially connected by a connecting means 51 to assemble the pillar 5.

Next, as shown in FIG. 6, after the strut mounting plate 57 constituting the strut support part H is placed in the upright position and the boom 58 constituting the upright mechanism I is brought into the upright position, the auxiliary boom 59 is fixed to the base 50. By doing so, the boom 58 is held in an upright position.

Furthermore, as shown in FIG. 6, after fixing the column 5 to the column mounting plate 57 in the upright state and routing the tip of the wire 61 to the vicinity of the middle part of the column 5 via the tip of the boom 56, the column 5 is fixed. It is fixed to the outer flange 51a located in the middle.

From this, by winding up the wire 61 with the hoisting machine 60, as shown in FIG. 7, the strut 5 is raised to the upright state while swinging the strut mounting plate 57.

Next, by fixing the column mounting plate 57 to the base 50, the column 5 is held substantially vertically on the base 50.
Here, as shown by chain lines in FIG. 7, the distal end of the column 5 and the base body 50 are connected by a plurality of tension wires 62 to restrain the fluctuation of the column 5, if necessary.

The installation of the lightning strike suppression device Z is completed by the above procedure.
The installation work can be concentrated on low-lying work on the ground around the base 50, and as a result, the installation work can be done safely and easily.

In this way, when installing the lightning strike suppression arrester Z, the installation position can be arbitrarily adjusted, and the number of installations can also be arbitrarily set.
Therefore, optimal installation is possible depending on the number of parked aircraft and the parking type.

When a thundercloud approaches the sky above the lightning suppression device Z, the ground D becomes positively charged, and the first electrode body 2 electrically connected to the ground D via the base 50 and the support 5 also becomes positively charged. Charged with electric charge.

When the first electrode body 2 is charged with a positive charge in this way, the second electrode body 3, which faces the first electrode body 2 in an electrically insulated state, is charged with a negative charge. A negative charge region is formed around the two-electrode body 3.

This negative charge region is formed to cover the sky above the parked airplane A, as shown by the chain line in FIG. 1, and is opposed to the negative charge at the bottom of the thundercloud.

As a result, it is possible to suppress the generation of a pick-up current flowing from above the apron B toward the thundercloud, thereby suppressing lightning strikes on the apron B, that is, the airplane A.

In this manner, according to the present embodiment, the degree of freedom in the installation position of the lightning strike suppression device Z can be increased, and the carrying in and out can be facilitated.

Note that the shapes, dimensions, etc. of each component shown in the above embodiments are merely examples, and can be variously changed based on design requirements and the like.

For example, the number of support columns 5a and 5b is not limited to two, but can be three or more.

In addition, instead of the above-mentioned connecting means 51 consisting of the outer flange 51a and bolts and nuts 51b, as shown in FIG. Alternatively, both the strut structures 5a and 5b may be connected by a bolt 63 passing through both the strut structures 5a and 5b, and a nut 64 screwed onto the bolt 63.

Furthermore, as shown in FIG. 10, the plurality of strut structures 5a and 5b are configured so that they can be fitted into each other, and a locking piece that can be deformed in the radial direction is attached to the end of the strut structure 5b located on the outside. 65, a threaded portion 66 is formed in a portion continuous with the locking piece 65, and an annular pressing member 67 is provided which is screwed into the threaded portion 66. The outer surface of 65 is an inclined surface whose diameter gradually decreases toward the tip of the support structure 5b, and the inner surface of the pressing member 67 has an inner diameter larger than the minimum diameter of the locking piece 65 and smaller than the maximum diameter. It is possible to adopt a configuration in which an annular pressing protrusion 68 is formed.

Then, the pressing member 67 is rotated as shown by the arrow A in FIG. By moving the pressing protrusion 68 formed at 67 toward the large diameter portion of the outer surface of the locking piece 65, the locking piece 65 is pressed and deformed radially inward.

Thereby, the locking piece 65 can be brought into pressure contact with the outer surface of the column structure 5b located inside, and both the column structures 5a and 5b can be connected.

1 Lightning strike suppression device main body 2 First electrode body 3 Second electrode body 3a Second electrode structure 3b Second electrode structure 4 Nut 5 Strut 5a Strut structure 5b Strut structure 6 Lock nut 7 Through hole 8 Spacer 8a Lower spacer 8b Upper spacer 9 Locking hole 10 Positioning protrusion 50 Base body 51 Connecting means 51a Outer flange 51b Bolt/nut 52 Rolling element 53 Connecting hook 54 First cylinder 55 Second cylinder 56 Stabilizing plate 57 Strut mounting plate 58 Boom 59 Auxiliary boom 60 volumes Upper aircraft 61 Wire 62 Tension wire 63 Bolt 64 Nut 65 Locking piece 66 Screw part 67 Pressing member 68 Pressing ridge A Airplane B Parking area D Ground E Fixing means F Storage part G Gap H Pillar support part I Erecting mechanism S Electrical insulation Layer T Table W Welding part Z Lightning suppression device

Claims (9)

A method for installing a lightning strike suppression device including the steps 1) to 5) below.
1) A step of storing a lightning strike suppression device main body, which constitutes a main part that suppresses lightning strikes, and a support supporting the lightning strike suppression device main body in a base body made of a conductive material.
2) A step of transporting the base body in which the lightning strike suppression device main body and the pillar are stored to an installation location.
3) Fixing the base to the ground.
4) A step of erecting and fixing the pillar to which the lightning suppression device body is attached to the base body to maintain the lightning suppression device body at a predetermined height from the ground.
5) A step of electrically connecting the base to the ground by contacting the ground through a plate . 2. The method for installing a lightning strike suppression device according to claim 1, wherein in step 2), the base body is constructed using a trailer, and the trailer is towed by a towing vehicle and transported to the installation location. 2. The method for installing a lightning strike suppression device according to claim 1, wherein in step 2), the base body is mounted on a self-propelled vehicle and transported to an installation location. In the step 4), the support column is made up of a plurality of support structure bodies, and prior to erecting and fixing the support structure on the base, the plurality of support structure bodies are connected in the axial direction to form a predetermined structure. 2. The method of installing a lightning strike suppression device according to claim 1, further comprising constructing a length support. A lightning suppression device is installed with a main body of the lightning suppression device, which constitutes the main part of the lightning suppression device, held at a predetermined height. a transportable base, a fixing means provided on the base for fixing the base to the ground, and a grounding means for electrically connecting the base and the ground; A storage part in which the lightning suppression device main body and the pillar are stored, and a pillar support part in which the pillar is erected and fixed are configured, the base body and the pillar are formed of an electrical conductor, and the grounding means is A lightning strike suppression device characterized by having a plate body that can come into contact with the ground . 6. The lightning suppression device according to claim 5, wherein the base body is constituted by a towable trailer. 6. The lightning suppression device according to claim 5, wherein the support column is configured to include a plurality of support structure bodies, and these support structure bodies are connected in the axial direction by a connecting means. The connecting means connects an outer flange provided at an end of the column structure, the outer flange provided on one column structure, and the outer flange provided on the other column structure. The lightning strike suppression device according to claim 7, characterized in that it is constituted by a bolt and a nut that are fastened. The plurality of strut structures are configured to be able to fit into each other, and the connecting means includes a radially deformable locking piece provided at an end of the strut structure located on the outside, and a locking piece located on the outside. 8. The lightning strike suppression device according to claim 7, further comprising a pressing member that is attached to a supporting column structure and presses the locking piece against an outer surface of the supporting column structure located inside.