JP2019175708A - Lightning suppression type lightning arrester and lightning suppression type lightning arrester device - Google Patents

Abstract

To make a positive charge area formed around a lightning arrester device as small as possible to effectively suppress the generation of an upward streamer.SOLUTION: A lightning arrester device includes an outer electrode body 3 having a cavity H therein, an inner electrode body 2 disposed in the cavity H, an electrical insulator S that insulates the outer electrode body 3 from the inner electrode body 2, and a support 5 that supports the inner electrode body 2. The electrical insulator S includes a holding member 6 that holds the inner electrode body 2 and the outer electrode body 3 at a predetermined interval, and the holding member 6 is provided with a support portion 6c that supports the outer electrode body 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lightning-suppressing lightning arrester and a lightning-suppressing lightning arrester for protecting a protected object such as a building or equipment from lightning damage by suppressing lightning.

  Lightning strikes are discharge phenomena that occur in the atmosphere. Lightning discharges include in-cloud discharges, inter-cloud discharges, and cloud-ground discharges. It is the cloud-to-ground discharge (hereinafter referred to as lightning strike) that causes significant damage from lightning discharge. A lightning strike is a phenomenon that occurs when the electric field strength between a thundercloud (cloud bottom) and a structure constructed on the earth or ground becomes very large, and its charge is saturated to break the insulation of the atmosphere. is there.

When lightning phenomenon is observed in detail, in the case of a general lightning strike (summer lightning) that occurs in summer, when thunderclouds mature, steppeda approaches the ground while selecting a place where thunderclouds are likely to discharge air.
When the stepreader reaches a certain distance from the ground, a weak current upward streamer (greeting discharge) extends from the ground, a building (lightning rod), a tree, or the like toward the steppedre.
When this streamer and the steppeder are coupled, a large current (feedback current) flows between the thundercloud and the ground through the path. This is a lightning phenomenon.

  In view of such a lightning phenomenon, most conventional lightning protection concepts have received a lightning strike to a ground with a needle-type lightning rod (Franklin rod) from the viewpoint that lightning cannot be prevented.

  On the other hand, the present inventors have proposed a lightning suppression type lightning arrester shown in Patent Document 1 in order to protect the protected object by suppressing the occurrence of lightning as much as possible.

  This lightning-suppressing type lightning arrester has an upper electrode body and a lower electrode body arranged with an insulator interposed therebetween, and is configured by grounding only the lower electrode body.

  For example, when a thundercloud in which negative charges are distributed at the cloud bottom approaches, charges opposite to the thunderclouds (plus charges) are distributed on the surface of the ground, and positive charges are also collected on the grounded lower electrode body.

  Then, the upper electrode body disposed via the insulator is negatively charged by the action of the capacitor.

  This action makes it difficult to generate upward streamers in the lightning arrester and its surroundings and suppresses the occurrence of lightning strikes.

Japanese Patent No. 5839331

  By the above-mentioned proposal by the present inventors as described above, lightning can be suppressed in a circular protection area centering on the lightning arrester.

  However, in the previous proposal, since a positive charge region is formed in the lower electrode body, which is the lower structure of the lightning arrester, a lightning strike to the lower electrode body is assumed depending on the lightning strike energy. As a result, the inventors have found that it is necessary to narrow the positive charge region as much as possible. At that time, the inventors have come to the knowledge that it is necessary to take measures for the electrode body holding structure.

  The present invention has been made on the basis of the above-described knowledge, and includes an outer electrode body having a cavity therein, an inner electrode body disposed in the cavity, and an electric insulator that insulates the outer electrode body and the inner electrode body from each other. And a support member that supports the inner electrode body, and the electrical insulator includes a holding member that holds the inner electrode body and the outer electrode body at a predetermined interval, and supports the outer electrode body on the holding member. A support portion is provided.

  By setting it as such a structure, the outer side electrode body is arrange | positioned in an electrically insulated state so that substantially the whole inner side electrode body may be covered with the form wrapped up with the outer side electrode body. Furthermore, the electrical insulator includes a holding member that holds the inner electrode body and the outer electrode body at a predetermined interval, and the holding member is provided with a support portion that supports the outer electrode body. Can be supported. Thereby, both an inner side electrode body and an outer side electrode body can be firmly supported in the state holding the predetermined space | interval.

  And when the inner electrode body is grounded, when a thundercloud with negative charges distributed on the cloud bottom approaches, the opposite charge (plus charge) is distributed on the surface of the ground, and the inner electrode body grounded to this ground Also, positive charges will be collected.

Then, the outer electrode body that is insulated from the inner electrode body via the electric insulator is negatively charged by the action of the capacitor.
This action makes it difficult to generate upward streamers in the outer electrode body and its surroundings, and can suppress the occurrence of lightning strikes.

In the present invention, an outer electrode body having a cavity inside is used, and the inner electrode body is disposed in the cavity, so that the outer electrode body can be configured to wrap the inner electrode body. become. As a result, most of the periphery of the outer electrode body is covered with negative charges.
Therefore, the positive charge region in the lightning arrester can be suppressed to be extremely small, and the occurrence of upward streamer when the thundercloud approaches can be effectively suppressed. As a result, the lightning suppression effect can be enhanced.

As a preferred embodiment of the present invention, a through hole communicating with the inside and outside of the outer electrode body is formed in the outer electrode body, and the support body is inserted into the outer electrode body in an electrically insulated state.
With this configuration, it is possible to ground only the inner electrode body through the support while holding the inner electrode body in an insulating state with respect to the outer electrode body.

In the present invention, it is preferable that the outer electrode body is provided with a protrusion that protrudes from the periphery of the through hole, and the support portion supports the protrusion.
Thus, the support of the outer electrode body can be ensured by supporting the protruding portion by the support portion.

As a preferred embodiment of the present invention, the protrusion is formed in a cylindrical shape that forms the inner wall surface of the through hole, and the support portion is provided with an annular groove into which the protrusion is fitted.
According to such a structure, since the cylindrical protrusion part of an outer side electrode body fits with respect to the annular groove of a holding member, an outer side electrode body and a holding member can be combined reliably. At that time, when an adhesive is used for mutual bonding, it becomes a double-sided adhesive form, so that the bonding force can be further increased. Furthermore, since the cylindrical protrusion fits into the annular groove, the inner and outer surfaces of the cylindrical protrusion are covered with a holding member that is an insulator. Thereby, an insulation function is improved.

In the present invention, it is desirable that the outer electrode body is formed to have a substantially spherical outer surface shape.
By making the outer surface of the outer electrode body into a substantially spherical shape, corners and protrusions can be eliminated, and a beautiful spherical outer shape can be obtained.

In the present invention, the inner electrode body is preferably formed in a substantially spherical shape or a spherical shell shape.
In this way, by forming the inner electrode body in a substantially spherical or spherical shell shape, the outer electrode body is disposed in an electrically insulated state so as to cover the inner electrode body to be grounded in a form of being housed and encased in the cavity. be able to.

In the present invention, it is preferable that the inner electrode body is formed in a substantially spherical shape or a spherical shell shape, and the outer electrode body is formed in a spherical shell shape.
When configured in this way, the outer electrode body has a large spherical cavity formed inside, so that the entire inner electrode body, which is grounded or substantially spherical, is wrapped in a spherical shell shape. The outer electrode body can be disposed in an electrically insulated state.

  In the present invention, the outer electrode body is formed in a spherical shell shape similar to the outer surface shape of the inner electrode body in order to enhance the function of covering most of the lightning protection device with negative charges, and the inner electrode The body may be configured so as to be almost entirely covered with the outer electrode body.

In the present invention, the inner electrode body and the outer electrode body can be substantially spherical.
Thus, when the inner electrode body and the outer electrode body are formed in a substantially spherical shape, not only the manufacturability and assemblability can be improved, but also the appearance can be improved.

  In the present invention, the support may include a conductive support provided on the inner electrode body, and the conductive support may be grounded.

  In the present invention, the support may include a cylindrical member provided on the outer electrode body, and the cylindrical member may be supported via an insulator. With this configuration, the outer electrode body can be supported by the cylindrical member.

  In the present invention, a through hole that communicates the inside and outside of the outer electrode body is formed in the lower part of the outer electrode body, and a support body electrically connected to the inner electrode body is formed in the through hole. On the other hand, it can be set as the structure penetrated in an electrical insulation state. According to this configuration, the support body can ensure the lightning protection function by grounding the inner electrode body.

  In the present invention, the through hole of the outer electrode body can be configured to have a size that allows the inner electrode body to be inserted into the outer electrode body. By configuring in this way, it is possible to greatly improve the productivity and assembly workability.

  The electric insulator is configured by a holding member that is disposed in the gap and is formed of an electric insulating material that holds the inner electrode body and the outer electrode body at a predetermined interval, and a space that is formed in the gap. can do.

  The electrical insulator can also be formed by providing a holding member made of an electrically insulating material over the entire gap formed between the inner electrode body and the outer electrode body. .

  The inner electrode body and the outer electrode body can be substantially spherical or elliptical in a vertical cross section. In particular, air resistance during strong winds can be reduced by using an elliptical shape like the latter.

  The lightning-suppressing lightning arrester of the present invention fixes the lightning-suppressing lightning arrester described above to a position where lightning should be suppressed via the support, and grounds the inner electrode body via the support. By adopting a configuration to do so, the lightning protection function can be exhibited.

  The lightning-suppressing lightning arrester of the present invention is configured such that the lightning-suppressing lightning arrester is fixed to a position where lightning is to be suppressed via the cylindrical support body, and the inner electrode body is grounded. The lightning protection function can be demonstrated.

  The lightning-suppressing lightning arrester of the present invention is such that the lightning-suppressing lightning arrester is fixed to a position where lightning should be suppressed via the cylindrical support and the cylindrical member, and the inner side through the support. It can also be set as the structure by which the electrode body is earth | grounded.

  The lightning-reducing lightning arrester of the present invention is provided with an inner electrode body, an outer electrode body arranged so as to wrap the inner electrode body at a predetermined interval, and the gap between the inner electrode body and the outer electrode body. An electrical insulator that holds the electrode body in an electrically insulated state, and the outer electrode body is provided with a connecting portion for connecting a cylindrical member that supports the outer electrode body. Yes.

  According to the lightning arrester of the present invention, since the outer electrode body is disposed so as to wrap around the inner electrode body, it is possible to have a configuration in which most of the periphery of the outer electrode body is covered with negative charges. In addition, since the inner electrode body is wrapped around the outer electrode body as described above, the lower electrode body can be positioned below the inner electrode body. Thereby, it is possible to adopt a configuration in which the inner electrode body is not exposed.

  Also in the lightning arrester of the present invention, the inner electrode body is formed in a substantially spherical shape or a spherical shell shape, and the outer electrode body is formed in a spherical shell shape. Preferably, the inner electrode body and the outer electrode body are formed in a substantially spherical shape. Further, the inner electrode body and the outer electrode body are formed in an elliptical shape in the vertical cross section. Further, the outer electrode body is formed in a hollow cylindrical shape, and the inner electrode body is formed in a cylindrical shape or a hollow inner cylindrical shape. Thereby, it can be set as the structure where the whole is compact and lightweight.

  Also, in the lightning arrester of the present invention, a through-hole that communicates the inside and outside of the outer electrode body is formed, and a support body electrically connected to the inner electrode body is formed in the through-hole in the outer electrode body. On the other hand, it can be set as the structure penetrated by the electrical insulation state.

The inner diameter of the through hole of the outer electrode body can be set smaller or larger than the outer diameter of the inner electrode body.
When the inner diameter of the through hole is set smaller than the outer diameter of the inner electrode body, the inner electrode body can be prevented from coming out of the through hole.
When the inner diameter of the through hole is set larger than the outer diameter of the inner electrode body, an operation of inserting the inner electrode body into the outer electrode body using the through hole can be employed.

In this invention, the structure which integrates the said inner side electrode body and the said support body by welding is employable.
Furthermore, the inner electrode body and the support body can be integrally formed of a conductive metal.

According to the present invention, the positive charge region formed around the lightning arrester can be made as small as possible to effectively suppress the generation of upward streamers, thereby enhancing the lightning suppression effect.
Moreover, according to the lightning arrester of this invention, in addition to said effect, simplification of a structure, weight reduction, improvement of manufacturability, etc. can be aimed at.
Furthermore, since the support member for supporting the outer electrode body is provided on the holding member, the outer electrode body can also be firmly supported. Thereby, both an inner side electrode body and an outer side electrode body can be firmly supported in the state holding the predetermined space | interval.

It is a longitudinal cross-sectional view of the lightning arrester which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the assembly aspect of the lightning arrester which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the installation aspect of the lightning arrester which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the lightning arrester which concerns on embodiment of this invention. It is a longitudinal cross-sectional view of the lightning arrester which concerns on embodiment of this invention. It is a front view of the lightning arrester which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6.
1 and FIG. 2 show the structure of a lightning-suppressing lightning arrester (hereinafter abbreviated as a lightning arrester) in cross section, and FIGS. Yes. FIG. 6 is a front view showing the outer shape of the lightning arrester.

  The lightning arrester is a lightning arrester portion indicated by reference numeral 1A in the drawing, and means a configuration in which the inner electrode body 2 is not grounded. As shown in FIGS. 3 to 5, the lightning arrester means a configuration in which the inner electrode body 2 of the lightning arrester 1A is grounded via a support 5 or the like and can exhibit a lightning protection function.

  As shown in FIG. 3, the lightning arrester 1 according to the embodiment includes a grounded inner electrode body 2, and an outer electrode body 3 provided so as to wrap the inner electrode body 2 with a predetermined gap E therebetween. And an electrical insulator S that is provided in the gap E and holds the inner electrode body 2 and the outer electrode body 3 in an electrically insulated state. The inner electrode body 2 is formed in a spherical shape, and the outer electrode body 3 is formed in a spherical shell shape. The inner electrode body 2 is covered by the outer electrode body 3 over almost the entire surface.

  The inner electrode body 2 is formed in a true spherical shape in the illustrated example. The inner electrode body 2 is not limited to a true spherical shape, and may be formed in a hollow shape having a predetermined thickness. Furthermore, an elliptical shape or other shapes are also possible.

  Further, the inner electrode body 2 is integrally attached with the tip of a support body 5 that also serves as a grounding rod by a coupling means such as welding or screw coupling.

  In this embodiment, as shown in FIGS. 1 and 2, the lightning arrester 1A includes an outer electrode body 3 having a cavity H therein, an inner electrode body 2 disposed in the cavity H, an outer electrode body 3 and an inner side. An electrical insulator S that insulates the electrode body 2 and a support body 5 that supports the inner electrode body 2 are provided.

  The electrical insulator S includes a holding member 6 that holds the inner electrode body 2 and the outer electrode body 3 at a predetermined interval, and the holding member 6 is provided with a support portion 6b that supports the outer electrode body 3. Yes. As shown in FIG. 1, the electrical insulator S includes a holding member 6 that also serves as a spacer and a space (air) formed in the gap E.

  A holding member 6 also serving as a spacer (hereinafter referred to as holding member) 6 holds a space between the inner electrode body 2 and the outer electrode body 3 at a predetermined interval, and a distance between the outer electrode body 3 and the support 5. The holding part 6b and the support part 6c which supports the lower part of the outer side electrode body 3 are provided. A small diameter portion 6d is provided at the lower portion of the holding portion 6b.

  The holding member 6 is provided with an insertion hole 6f extending and penetrating in the axial direction of the holding member 6, and the support body 5 is inserted into the insertion hole 6f. The insertion hole 6f is set so that the columnar support 5 is in a tight insertion state without rattling.

  The support 5 is made of a conductive metal, and a male screw 51 for screwing a nut 52 or the like is provided at the lower end thereof.

  The inner electrode body 2 and the outer electrode body 3 are formed of a conductive metal such as stainless steel or aluminum alloy. On the other hand, as the electrically insulating material, synthetic resin, ceramic, or the like can be suitably used, but other electrically insulating materials can also be used.

  The outer electrode body 3 is integrally formed of a conductive metal in the illustrated example. However, the outer electrode body 3 may be formed of a pair of outer electrode structures that are divided into upper and lower parts. Further, the outer electrode body 3 can be divided into two parts (vertically divided).

  As shown in FIG. 2, the outer electrode body 3 is provided with a through hole 31 that communicates the inside and the outside. In the through hole 31, the support body 5 is connected to the outer electrode body 3 via the holding member 6. On the other hand, it is inserted in an electrically insulated state. Further, the outer electrode body 3 is provided with a protruding portion (skirt portion) 32 protruding from the periphery of the through hole 31. The protrusion 32 is supported by a support portion 6c having an annular groove 6e.

  As shown in FIG. 2, the protruding portion 32 is formed in a cylindrical shape that forms the inner wall surface of the through hole 31. The inner diameter of the protrusion 32 is slightly larger than the outer diameter of the inner electrode body 2. Thereby, the inner electrode body 2 can be inserted into the outer electrode body 3.

  The support portion 6c is provided with an annular groove 6e into which the cylindrical protrusion 32 is fitted. The annular groove 6e is provided near the outer peripheral surface of the holding member 6, and is formed as an annular groove having an upward opening as a whole.

  The holding portion 6 b is formed to be in contact with the inner surface of the cylindrical protruding portion 32 of the outer electrode body 3 and to be longer than the cylindrical protruding portion 32 so as to extend downward. Further, the support portion 6 c is formed with a larger diameter than the cylindrical protrusion 32. The small diameter portion 6d may be formed to have the same diameter as the support portion 6c or may be formed long in the axial direction. Furthermore, you may comprise the small diameter part 6d part as a cylindrical separate member.

  In the figure, reference numeral 33 denotes an internal pressure adjusting hole communicating with the inside and outside of the outer electrode body 3. Thereby, even if the internal pressure of the outer electrode body 3 is suddenly increased by an unexpected lightning strike, the inner electrode body 2 is configured not to come out. The internal pressure adjusting hole 33 may be provided with a valve body that opens at a predetermined internal pressure, or a plug body that escapes to the outside.

The lightning arrester 1A and the lightning arrester 1 of this embodiment are assembled in the following procedures.
First, the inner electrode body 2 is mechanically and electrically connected to one end (upper end) of the support 5 by means such as screw connection or welding stop.

Next, as shown in FIG. 2, the support 5 is inserted into the holding member 6 using the insertion hole 6 f of the holding member 6 with the nut 52 removed.
Next, the inner electrode body 2 is inserted into the outer electrode body 3 using the through holes 31 of the outer electrode body 3.
At this time, as shown in FIG. 1, the cylindrical projecting portion 32 is firmly inserted into the annular groove 6 e of the holding member 6.

In addition, before insertion of the inner side electrode body 2, both can be adhere | attached strongly by apply | coating an adhesive agent (not shown) in the inner / outer surface of the protrusion part 32, or the annular groove 6e.
Note that the protrusion 32 may be screwed to the holding member 6 instead of or in addition to the adhesive.

  In the lightning arrester 1, the lightning arrester 1A assembled as described above is fixed to a mounting flange 71 of a cylindrical support 7 made of a metal pipe having conductivity as shown in FIG. The cylindrical support 7 can be grounded. The cylindrical support 7 is not limited to a pipe member, and various types can be used. Further, as shown in FIG. 3, the support 5 may be directly grounded using a ground wire or the like. In that case, the cylindrical support 7 need not have conductivity.

  In the lightning arrester 1A assembled in this way, the outer electrode body 3 is connected to the inner electrode body 2 at a predetermined interval by the holding member 6 and is electrically insulated. In the assembled state, the outer electrode body 3 is positioned so as to cover almost the entire circumference of the inner electrode body 2. That is, the lower end portion of the outer electrode body 3 has a three-dimensional structure positioned below the inner electrode body 2. Further, the inner electrode body 2 is electrically drawn out of the outer electrode body 3 through the support body 5.

  The lightning arrester 1 </ b> A configured in this way is installed on or near a protected body that should be protected from lightning. At that time, it is installed using an additional connection support, a cylindrical member, an insulator, a support structure, a bolt / nut, or the like. As shown in FIG. 3, the support 5 is grounded to the ground G directly or via a cylindrical support 7 or a ground wire.

  Next, the lightning suppression function by the lightning arrester 1 of this embodiment installed in this way will be described.

  When a thundercloud with negative charges distributed on the cloud base approaches, the opposite charge (plus charge) is distributed on the surface of the ground G and is grounded to the ground G via the support 5 and the cylindrical support 7. As shown in FIG. 3, positive charges are also collected in the inner electrode body 2.

On the other hand, the outer electrode body 3 opposed to the inner electrode body 2 via the electrical insulator S is negatively charged by the action of the capacitor.
This action makes it difficult for upward streamers to occur in the outer electrode body 3 and its surroundings, thereby suppressing the occurrence of lightning strikes.

  Since the outer electrode body 3 is provided so as to cover substantially the entire circumference of the inner electrode body 2, most of the upper end portion (lightning arrester portion) of the lightning arrester 1 is negatively charged.

  As a result, the positive charge region that causes the upward streamer can be greatly reduced, and the lightning suppression effect can be greatly improved.

  Moreover, according to the lightning arrester 1A of this embodiment, the whole structure can be simplified, it can be comprised compactly, and it can also make it convenient for conveyance. Further, the manufacturability can be remarkably improved, and a strong structure can be obtained.

  In particular, the holding member 6 is provided with an annular groove 6e, and the cylindrical protrusion 32 is fitted into the annular groove 6e, so that the coupling strength is improved and the support 5 and the external electrode Both the functions of improving the insulation performance with the body 3 can be effectively exhibited.

  4 and 5 show another embodiment of the present invention, and are longitudinal sectional views of the lightning arrester 1 using the lightning arrester 1A of FIG. In these drawings, components that are basically the same as those in the previous embodiment are denoted by the same reference numerals, and description thereof is simplified.

  In this embodiment, it is set as the structure (FIG. 4) using the support body 5 longer than the thing of previous embodiment. Even in this configuration, the same effect as in the previous embodiment can be exhibited. However, as shown in FIG. 5, it is preferable that the tubular member 8 is further used to cover the exposed portion of the support 5.

  That is, in FIG. 5, an insulating cylindrical member 8 that supports the outer electrode body 3 is provided between the holding member 6 and the mounting flange 71. The inner diameter of the cylindrical member 8 is set to a size that can be forcibly fitted to the small diameter portion 6 d of the holding member 6. Further, as shown in FIG. 4, the length of the cylindrical member 8 is substantially equal to the height h from the upper surface of the mounting flange 71 to the lower end of the support portion 6c (the boundary portion between the small diameter portion 6d and the support portion 6c). It is set to be equal. The cylindrical member 8 is made of an insulating material such as synthetic resin.

  In FIG. 5, reference numeral 8 indicates a protrusion. The protrusion 8 is used to exhibit the function as an existing lightning rod when the cylindrical support 7 is grounded. The protrusion 8 may not be provided.

  In the present embodiment, since the position of the insulating cylindrical member 8 is higher than the cylindrical support 7 having the mounting flange 71, a structure in which the support 5 having a positive charge is covered from the outside with an insulator, Thus, the soundness of the function (the effect of negative charges) of the outer electrode body 3 can be improved.

  The shapes of the outer electrode body 3 and the inner electrode body 2 may be elliptical in the vertical cross section instead of the true spherical shape in FIG.

The various shapes, dimensions, and the like of the constituent members shown in the embodiments are merely examples, and various changes can be made based on design requirements and the like.
For example, the inner electrode body 2 and the support body 5 may be integrally formed of a conductive metal such as stainless steel or aluminum alloy. In this way, it is possible to further reduce the number of parts and improve the assembly workability.

  Moreover, about the support body 5, although the example which used the screw rod was shown in the example of illustration, it is good also as a structure which uses the cylindrical support body and welds one end to an inner side electrode body. In addition, a screw hole or the like may be provided at the other end so that another cylindrical support can be connected.

  In the above embodiment, an example in which the outer electrode body 3 has a spherical shell shape is shown, but the present invention is not limited to this. For example, it may be a hexahedron or a polyhedron of more. Further, the outer electrode body 3 may have a hollow cylindrical shape.

Further, the inner electrode body 2 may be a hexahedron or a polyhedron of higher than the same as the outer electrode body 3. Further, the inner electrode body 2 may be a hollow cylinder or a cylinder. Furthermore, you may comprise the inner side electrode body 2 using a some disc.
Further, the inner electrode body 2 and the outer electrode body 3 may have a vertically long elliptical shape in a vertical section.

  The lightning arrester and the lightning arrester of the present invention can be effectively used as a lightning arrester that protects protected objects such as various buildings and structures, various equipment, and communication facilities by suppressing lightning.

DESCRIPTION OF SYMBOLS 1 (Lightning strike suppression type) Lightning arrester 1A Lightning arrester 2 Inner electrode body 3 Outer electrode body 31 Through-hole 32 Projection part 33 Internal pressure adjustment hole 5 Support body 51 Male screw 52 Nut 6 Holding member 6a Spacer part 6b Holding part 6c Supporting part 6d Small diameter portion 6e Annular groove 6f Insertion hole 7 Cylindrical support 8 Cylindrical member 9 Protrusion C Thundercloud E Clearance (electrical insulator)
G Ground H Cavity S Electrical insulator

Claims (17)

An outer electrode body having a cavity therein, an inner electrode body disposed in the cavity, an electrical insulator that insulates the outer electrode body and the inner electrode body, a support body that supports the inner electrode body, With
The electrical insulator includes a holding member that holds the inner electrode body and the outer electrode body at a predetermined interval, and the holding member is provided with a support portion that supports the outer electrode body. Arrestor.   The lightning suppression according to claim 1, wherein a through hole communicating with the inside and outside of the outer electrode body is formed in the outer electrode body, and the support body is inserted into the outer electrode body in an electrically insulated state. Type lightning arrester.   The lightning-reducing lightning arrester according to claim 2, wherein the outer electrode body is provided with a protruding portion that protrudes from the periphery of the through hole, and the support portion supports the protruding portion.   The lightning strike suppression type lightning arrester according to claim 3, wherein the protrusion is formed in a cylindrical shape that forms an inner wall surface of the through hole, and the support portion is provided with an annular groove into which the protrusion is fitted.   The lightning-suppressing lightning arrester according to any one of claims 1 to 4, wherein an outer surface shape of the outer electrode body is formed in a substantially spherical shape.   The lightning-reducing lightning arrester according to any one of claims 1 to 5, wherein the inner electrode body is formed in a substantially spherical shape or a spherical shell shape.   The lightning strike suppression arrester according to any one of claims 1 to 6, wherein the outer electrode body is formed in a spherical shell shape similar to the outer surface shape of the inner electrode body.   The lightning-reducing lightning arrester according to any one of claims 1 to 7, wherein the inner electrode body and the outer electrode body are substantially spherical.   The lightning-reducing lightning arrester according to any one of claims 1 to 7, wherein the inner electrode body and the outer electrode body have an elliptical shape in a vertical cross section.   The lightning-reducing lightning arrester according to any one of claims 1 to 9, wherein the inner electrode body is covered almost entirely by the outer electrode body.   The lightning-suppressing lightning arrester according to any one of claims 1 to 10, wherein the support includes a grounding conductive support provided on the inner electrode body.   The lightning strike suppression lightning arrester according to any one of claims 1 to 11, further comprising a cylindrical member that supports the outer electrode body.   The lightning-reducing lightning arrester according to any one of claims 2 to 12, wherein the through hole of the outer electrode body is set to a size that allows the inner electrode body to be inserted into the outer electrode body.   The lightning suppression lightning arrester according to any one of claims 1 to 13, wherein the holding member is provided with a connection portion for connecting a cylindrical member that supports the outer electrode body via the holding member. .   The lightning-suppressing type arrester according to any one of claims 1 to 14 is fixed to a position where lightning is to be suppressed through the support, and the inner electrode body is grounded through the support. Lightning suppression type lightning arrester characterized by that.   The lightning-suppressing type arrester according to any one of claims 1 to 14 is fixed to a position where lightning should be suppressed via a cylindrical support, and the inner electrode body is grounded. Lightning suppression type lightning arrester.   The lightning-suppressing lightning arrester according to any one of claims 1 to 14 is fixed to a position where lightning should be suppressed via the cylindrical support and the cylindrical member, and the lightning suppressor Lightning suppression type lightning arrester with inner electrode body grounded.