JP6347340B1 - Lightning suppression type lightning arrester and lightning arrester - Google Patents

Abstract

A positive charge region formed around a lightning arrester is reduced as much as possible to effectively suppress the generation of upward streamers. A grounded inner electrode body, an outer electrode body provided so as to wrap the inner electrode body with a predetermined gap G, and the inner electrode provided in the gap G are provided. An electric insulator S that holds the body 2 and the outer electrode body 3 in an electrically insulated state, and a support for the outer electrode body, the inner electrode body 2 is formed in a substantially spherical shape, and the outer electrode body 3 is The inner electrode body 2 is formed in a spherical shell shape similar to the outer surface shape of the inner electrode body 2, and the inner electrode body 2 is covered with the outer electrode body 3 over almost the entire surface. [Selection] Figure 1

Description

  The present invention relates to a lightning-suppressing lightning arrester and a 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 phenomena are observed in detail, in the case of a general lightning (summer lightning) that occurs in the summer, when the thundercloud matures, the steppedore approaches the ground from the thundercloud, selecting where it is likely to discharge air.
When the stepreader is at 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 stepreader.
When this streamer and steppeda 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, 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.

  The present invention has been made based on the above-described knowledge, and is provided with an inner electrode body that is grounded, an outer electrode body that is provided so as to wrap the inner electrode body with a predetermined gap therebetween, and the gap. And an electrical insulator that holds the inner electrode body and the outer electrode body in an electrically insulated state, and a support that supports the outer electrode body.

  By adopting such a configuration, the outer electrode body is disposed in an electrically insulated state so as to cover almost the entire inner electrode body to be grounded in a form of being wrapped with the outer electrode body.

  When a thundercloud with negative charges distributed at the bottom of the cloud approaches, the opposite charge (plus charge) is distributed on the surface of the ground, and the positive charge is also collected on the inner electrode body grounded to this ground. Become.

Then, the outer electrode body disposed on the inner electrode body via an electrical 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.

Here, since the outer electrode body is disposed so as to wrap around the inner electrode body, most of the area around the lightning arrester 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.

  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 so that the substantially spherical or spherical shell-shaped inner electrode body that is grounded is wrapped. The spherical shell-shaped outer electrode body is disposed in an electrically insulated state so as to be covered by

  In the lightning arrester of 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 arrester device with negative charges. The inner electrode body may be covered with the outer electrode body over almost the entire surface.

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

  In the lightning arrester of 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. It can be set as the structure penetrated with an outer electrode body in an electrical insulation state. According to this configuration, the support body can ensure the lightning protection function by grounding the inner electrode body.

  The lightning arrester of the present invention can be configured such that 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. By configuring in this way, it is possible to greatly improve the productivity and assembly workability.

  The electrical insulator is configured by a spacer formed of an electrical insulating material that is disposed in the gap and holds the inner electrode body and the outer electrode body at a predetermined interval, and a space formed in the gap. be able to.

  The electrical insulator can also be formed by providing a spacer formed of an electrical 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 addition, the outer electrode body can be formed into an internal hollow cylindrical shape, and the inner electrode body can be formed into a cylindrical shape or an internal hollow cylindrical shape.

  In particular, air resistance during strong winds can be reduced by using an elliptical shape like the latter.

  On the other hand, the outer electrode body is constituted by a pair of outer electrode structures formed by being divided into two parts, and the pair of outer electrode structures are butted together so as to sandwich the electrical insulator, and the inner electrode body is It is possible to integrate with the inner electrode body by wrapping and connecting and integrating at the abutted portions in an electrically conductive state.

  Then, the pair of outer electrode structural bodies can be integrated by welding the butted portions or screwing at the butted portions.

  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, wherein the outer electrode body is provided with a connecting portion for connecting a support body that supports the outer electrode body. .

  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.

  In this invention, it can also be set as the structure which provided the cylindrical skirt part which forms the inner wall face of the said through-hole in the said outer side electrode body.

  In the present invention, the length of the skirt portion may be longer than the outer diameter of the outer electrode body.

According to the lightning suppression type lightning arrester of the present invention, the positive charge area formed around the lightning arrester can be made as small as possible to effectively suppress the generation of upward streamers, thereby increasing the lightning suppression effect. it can.
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.

It is a longitudinal cross-sectional view of the lightning arrester which concerns on the 1st Embodiment of this invention. It is a longitudinal cross-sectional view of the lightning arrester which concerns on the 1st Embodiment of this invention. It is the schematic for demonstrating the streamer generation | occurrence | production suppression effect in this invention. It is a longitudinal cross-sectional view of the lightning arrester which concerns on the 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of the lightning arrester which concerns on the 3rd Embodiment of this invention.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, the code | symbol 1 shows the lightning suppression type lightning arrester (henceforth a lightning arrester) concerning this embodiment.
In the embodiment of the present invention, the lightning arrester means a lightning arrester portion indicated by reference numeral 1A as shown in FIG. 2, and means a configuration in which the inner electrode body is not grounded. As shown in FIG. 3, the lightning arrester means a configuration in which the inner electrode body of the lightning arrester 1 </ b> A is grounded via a support or the like and can exhibit a lightning protection function.

  The lightning arrester 1 of this embodiment includes a grounded inner electrode body (second electrode body) 2 and an outer electrode body (first electrode) provided so as to wrap the inner electrode body 2 with a predetermined gap G therebetween. 1 electrode body) 3 and an electrical insulator (electrical insulating layer) S provided in the gap G and holding 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 substantially spherical shape, and the outer electrode body 3 is formed in a spherical shell shape similar to the outer surface shape of the inner electrode body 2. 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 as shown in FIGS. 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.

In addition, the tip of the grounding rod 51 is integrally attached to the inner electrode body 2 by a coupling means such as welding or screw coupling.
In this embodiment, as shown in FIG. 1, the lightning arrester 1A includes an inner electrode body 2, an outer electrode body 3 disposed so as to enclose the inner electrode body 2 with a predetermined gap G, and a gap G is provided with an electrical insulator S that holds the inner electrode body 2 and the outer electrode body 3 in an electrically insulated state, and a support body 30 that supports the outer electrode body 3 is connected to the outer electrode body 3. A connecting portion 3d is provided.

The outer electrode body 3 is composed of a pair of outer electrode structures 3a and 3b formed by being divided into two parts in the vertical direction. The outer electrode body 3 can be divided into two parts (vertically divided).
The pair of outer electrode structures 3a and 3b are wrapped so as to sandwich the electric insulator S so as to wrap the inner electrode body 2, and are integrated by welding (welded portion W) at the butted portions. Yes.

  The electrical insulator S is disposed in the gap G, and a spacer 8 formed of an electrical insulating material that holds the inner electrode body 2 and the outer electrode body 3 at a predetermined interval, and the inner electrode body 2 and the outer electrode body 3. It is comprised by the clearance gap G which forms a space between. As the electrically insulating material, synthetic resin, ceramic, or the like can be suitably used, but other electrically insulating materials can also be used.

  In the present embodiment, the spacer 8 includes a lower spacer 8 a disposed at the lower portion of the inner electrode body 2 and an upper spacer 8 b disposed at the upper portion of the inner electrode body 2.

The lower spacer 8a is fitted into a later-described through hole 7 of the lower outer electrode structure 3a, and has a shape that is brought into surface contact with the lower inner surface of the lower outer electrode structure 3a.
The lower spacer 8a and the lower outer electrode structure 3a are integrated by an adhesive or the like.

  A grounding rod 51 is passed through the center of the lower spacer 8a. The grounding rod 51 is electrically connected to the lower outer electrode structure 3a by the lower spacer 8a while maintaining a predetermined distance. They are connected in an insulated state.

  The upper spacer 8 b is formed in a spherical shape so that the lower surface is along the outer surface of the inner electrode body 2, and the upper surface is along the inner surface of the outer electrode body 3. Positioning protrusions (both not shown) are provided so as to be fitted into the formed locking holes.

The upper spacer 8b is also fixed to the inner electrode body 2 and the outer electrode body 3 with an adhesive or the like.
As shown in FIG. 1, the inner diameter of the through hole 7 is set smaller than the outer diameter of the inner electrode body 2. In FIG. 1, reference numeral 16 indicates 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 16 may be provided with a valve body that opens at a predetermined internal pressure or a plug body that goes out to the outside.

  In the present embodiment, the inner electrode body 2 is formed in a spherical shape, the outer electrode body 3 is formed in a spherical shell shape, and a thickness having the through hole 7 of the grounding rod 51 at the lower portion of the outer electrode body 3. A meat skirt 3c is provided. And the cylindrical connection part 3d for connecting the cylindrical support body 30 shown in FIG. 11 is provided in the lower part of this skirt part 3c. The outer diameter of the connecting portion 3d is smaller than the outer diameter of the skirt portion 3c. Further, the outer diameter of the connecting portion 3 d is formed to be slightly smaller than the inner diameter of the cylindrical support 30.

  Thereby, the cylindrical connection portion 3d is configured to be coaxially fitted in the upper end portion of the cylindrical support 30. The connection portion 3d can be fixed to the cylindrical support 30 by welding, screwing, adhesive, screw connection, or a combination thereof.

  The upper end of the grounding rod 51 is electrically connected to the inner electrode body 2 by a fixing method such as screw connection, welding, or adhesion. The lower end of the grounding rod 51 is formed to have a length that protrudes downward from the lower end of the connecting portion 3d, and a screw hole 5b for connection is provided at the lower end.

  A connecting rod 52 is coaxially coupled to the grounding rod 51. At the upper end of the connecting rod 52, a male screw 5a is provided for being screwed into and connected to the screw hole 5b of the grounding rod 51. The lower end of the grounding rod 52 is grounded directly to the ground or via the grounding member.

  An attachment flange 31 is provided at the lower end of the cylindrical support 30. The mounting flange 31 is fixed to the support structure 33 by fastening means such as bolts 34 and nuts 35. In this case, when the support structure 33 is an insulator, it may be fixed directly, but when the support structure 33 has conductivity, it is fixed via the electrical insulator 32.

  The cylindrical support 30 preferably has conductivity, but may be formed of a non-conductive material. When the cylindrical support 30 is made of a conductive metal or the like, it is preferable to provide a cylindrical insulator 36 or the like having a hole through which the connecting rod passes.

The lightning arrester 1A and the lightning arrester 1 of this embodiment are assembled in the following procedures.
First, the lower spacer 8a is fixed to the bottom of the inner surface of the lower outer electrode structure 3a so as to close the through hole 7 provided in the bottom.

  Next, after inserting the grounding rod 51 to which the inner electrode body 2 is fixed into the lower spacer 8 a, the upper spacer 8 b is placed on the upper part of the inner electrode body 2, and the positioning protrusion is used as a locking hole for the inner electrode body 2. Fix while fitting.

  Then, the upper outer electrode structure 3b is covered so as to cover the upper spacer 8b, and the lower part is butted against the lower outer electrode structure 3a.

  Thus, the butted portions of the upper and lower outer electrode structures 3a and 3b are connected by welding to complete the assembly as shown in FIG.

  In the lightning arrester 1A of the present embodiment assembled in this way, the outer electrode body 3 is composed of the lower spacer 8a and the upper spacer 8b. The inner electrode body 2 is connected at a predetermined interval and in an electrically insulated state.

In the assembled state as described above, the outer electrode body 3 is positioned so as to cover substantially the entire circumference of the inner electrode body 2.
The inner electrode body 2 is electrically drawn out of the outer electrode body 3 through a grounding rod 51.

  The lightning arrester 1A of the present embodiment configured as described above uses the connection rod 52, the additional connection rod 52, the cylindrical support 30, the insulator 32 support structure 33, the bolt 34, the nut 35, and the like. Installed on or near the object to be protected from lightning. Then, the connecting rod 52 is grounded directly to the ground E or via a grounding wire or the like as shown in FIGS.

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

  As shown in FIG. 3, when a thundercloud C in which a negative charge is distributed on the cloud bottom approaches, a charge opposite to that (positive charge) is distributed on the surface of the ground E, and the grounding rod 51 is connected to the ground E. As shown in FIG. 2, positive charges are also collected on the inner electrode body 2 that is grounded via the rod 52.

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 almost the entire circumference of the inner electrode body 2, most of the upper end portion of the lightning arrester 1 of the present embodiment 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.

  In particular, according to the lightning arrester 1 of the present embodiment, by providing the cylindrical support 30 with conductivity, the outer electrode body 3 and the cylinder are compared with the inner electrode body 2 that is charged with a positive charge when the thundercloud approaches. Negative charges can be charged on the surface of the cylindrical skirt portion 3 c and the cylindrical support 30. That is, the cylindrical support 30 can also function as the outer electrode body 3. Thereby, it can be set as the structure which the area | region which suppresses generation | occurrence | production of the upward streamer as a welcome discharge spreads directly also under the outer side electrode body 3. FIG.

  In the present embodiment, the outer electrode body 3 is supported by the cylindrical support 30 so that the grounding rod 51 and the connecting rod 52 have a grounding function only. it can. Thereby, for example, a pipe material, a grounding cable, a covered electric wire, a bare electric wire, or the like can be used for the connecting rod 52.

  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.

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

  In the present embodiment, the cylindrical support 30 has a multi-stage configuration (a two-stage configuration in the illustrated example). That is, a cylindrical support body 30 disposed above and a cylindrical support body 30 disposed below are provided. An attachment flange 31 is provided at the lower end of the upper cylindrical support 30, and attachment flanges 31, 31 are provided at the upper and lower ends of the lower cylindrical support 30. The upper and lower adjacent flanges 31 are connected to each other by fastening bolts, nuts or the like (not shown) via insulators 32. The lowermost mounting flange 31 is fixed by bolts 34 and nuts 35 in contact with the support structure 33.

  In this embodiment, since the position of the insulator 32 is higher than the support structure 33, the soundness of the functions of the outer electrode body 3 and the cylindrical support body 30 can be ensured. Furthermore, the height adjustment of the lightning arrester 1 can be arbitrarily performed by using a plurality of cylindrical supports 30.

FIG. 5 is a longitudinal sectional view of a lightning arrester showing a third embodiment of the present invention.
A lightning arrester 1A according to this embodiment shows an example in which the thickness of the outer electrode body 3 is made thicker than that shown in FIG. This embodiment is suitable for forming the outer electrode body 3 from a lightweight aluminum alloy or the like. Of course, you may form with electroconductive metals, such as stainless steel.

  In the above embodiment, the spacer 8a is adapted to be fitted into the skirt portion 3c from the outside of the outer electrode body 3, and the skirt can be bonded, screwed, or both. You may make it fix to the part 3c. Of course, it is also possible to screw the spacer 8a and the skirt portion 3c. In that case, a method of screwing a plurality of places at intervals in the circumferential direction of the skirt portion 3c, a method of screwing in multiple stages at intervals in the vertical direction, and the like may be adopted.

Further, 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.
Further, the inner diameter of the through hole 7 of the outer electrode body 3 may be set larger than the outer diameter of the inner electrode body 2. In this way, the inner electrode body 2 can be inserted into and removed from the outer electrode body 3 using the through-hole 7.

  The lengths of the skirt portion 3c and the connection portion 3d are not particularly limited. In the present embodiment, the total length of the skirt portion 3c and the connection portion 3d is an example in which the total length is approximately the same as the outer diameter (diameter) of the outer electrode body 3, but the diameter of the outer electrode body 3 is shown. The length may be about half or twice as long.

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 grounding rod 51 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.

  Further, regarding the grounding rod 51 and the connecting rod 52, in the illustrated example, an example in which a screw rod is used is shown, but a configuration may be adopted in which one end is welded to the inner electrode body using a cylindrical member. Further, a screw hole or the like may be provided at the other end so that another cylindrical member 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 suppression type 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 3a Outer electrode structure 3b Outer electrode structure 3c Skirt part 3d Connection part 31 Mounting flange 32 Insulator 33 Support structure 34 Bolt 35 Nut 4 Nut 51 Grounding rod 52 Connecting rod 7 Through hole 8 Spacer 8a Lower spacer 8b Upper spacer 16 Internal pressure adjusting hole C Thundercloud E Earth G Gap (electrical insulator)
S Electric insulator W Welded part

Claims (24)

An inner electrode body to be grounded, an outer electrode body provided so as to wrap the inner electrode body with a predetermined gap, and an electric insulation state between the inner electrode body and the outer electrode body provided in the gap. A lightning-suppressing type comprising: an electrical insulator to be held on; a cylindrical support for supporting the outer electrode body; and a conductive support provided on the inner electrode body , wherein the conductive support is grounded Lightning arrester.   The lightning-suppressing lightning arrester according to claim 1, wherein 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.   The lightning strike suppression lightning arrester according to claim 1 or 2, 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-suppressing type lightning arrester according to claim 1, wherein the inner electrode body and the outer electrode body are substantially spherical.   The lightning strike suppression lightning arrester according to claim 1, wherein the inner electrode body and the outer electrode body are elliptical in a vertical cross section.   The lightning-reducing lightning arrester according to claim 1, wherein 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.   The lightning-suppressing type lightning arrester according to any one of claims 1 to 6, wherein the inner electrode body is covered almost entirely by the outer electrode body. A through hole is formed in the lower portion of the outer electrode body so as to communicate the inside and outside thereof, and a conductive support electrically connected to the inner electrode body is electrically insulated from the outer electrode body in the through hole. The lightning-reducing lightning arrester according to any one of claims 1 to 7 , which is inserted in a state and the inner electrode body is grounded through the conductive support. 9. The lightning-suppressing lightning arrester according to claim 8 , 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 electrical insulator is arranged in the gap, and includes a spacer formed of an electrical insulating material that holds the inner electrode body and the outer electrode body at a predetermined interval, and a space formed in the gap. The lightning-suppressing type lightning arrester according to any one of claims 1 to 9 . The said electrical insulator is provided over the whole region of the clearance gap formed between the said inner side electrode body and the said outer side electrode body, and is comprised by the spacer formed with the electrically insulating material. A lightning suppression type lightning arrester according to any one of claims 9 to 9 .   The outer electrode body is constituted by a pair of outer electrode structures formed by dividing the outer electrode body into two parts, and the pair of outer electrode structures are abutted so as to sandwich the electrical insulator, thereby The lightning-suppressing type lightning arrester according to any one of claims 1 to 5, which wraps around the electrode body and is connected and integrated in an electrically conductive state at the abutted portion. The lightning strike suppression lightning arrester according to claim 12 , wherein the pair of outer electrode structural bodies are integrated by welding at the butted portions. The lightning-suppressing type lightning arrester according to claim 12 , wherein the pair of outer electrode structural bodies are integrated by being screwed at the butted portions. An inner electrode body, an outer electrode body arranged so as to wrap the inner electrode body with a predetermined gap, and the gap between the inner electrode body and the outer electrode body are maintained in an electrically insulated state. The outer electrode body is provided with a connecting portion for connecting a cylindrical support body that supports the outer electrode body, and the outer electrode body has a through hole that communicates the inside and the outside. A lightning-suppressing lightning arrester in which a hole is formed, and a conductive support electrically connected to the inner electrode body is inserted into the through-hole in an electrically insulated state with respect to the outer electrode body . The lightning-suppressing lightning arrester according to claim 15 , wherein 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. The lightning-reducing lightning arrester according to claim 15 or 16 , 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 claim 15 , wherein the inner electrode body and the outer electrode body have a substantially spherical shape. The lightning-reducing lightning arrester according to claim 15 , 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 claim 15 , wherein the outer electrode body is formed in an inner hollow cylindrical shape, and the inner electrode body is formed in a cylindrical shape or an inner hollow cylindrical shape. The lightning-reducing lightning arrester according to any one of claims 15 to 20 , wherein the inner electrode body is covered almost entirely by the outer electrode body. The lightning-reducing lightning arrester according to any one of claims 15 to 21 , wherein an inner diameter of the through hole of the outer electrode body is set smaller than an outer diameter of the inner electrode body. The lightning-reducing lightning arrester according to any one of claims 15 to 21 , wherein an inner diameter of the through hole of the outer electrode body is set larger than an outer diameter of the inner electrode body. The lightning-reducing lightning arrester according to any one of claims 15 to 21 , wherein the outer electrode body is provided with a cylindrical skirt portion that forms an inner wall surface of the through hole.