JP6120191B1 - Lightning suppression type lightning arrester - Google Patents

Abstract

A lightning protection type lightning arrester capable of forming a lightning protection region in accordance with an object to be protected is provided. A linear first electrode 4 is provided between a support body (2) erected at an interval via a connector 3 made of an electrically insulating material, and the first electrode 4 A linear second electrode 5 disposed along the first electrode 4 is provided below, and the second electrode 5 is formed by a plurality of spacers 6 made of an electrically insulating material. The electrode 4 is suspended from the electrode 4 at a predetermined interval, and a ground line is connected to the second electrode 5. [Selection] Figure 1

Description

  The present invention relates to a lightning-suppressing lightning arrester for protecting a protected body 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, the objects to be protected against lightning are diversified, and it has been found that it is necessary to form an optimal protection region corresponding to the diversification of the objects to be protected.

The present invention has been made on the basis of the above-described knowledge, and between the supports erected at intervals, a linear first electrode constructed via a connector made of an electrically insulating material, A linear second electrode is provided below the first electrode so as to extend along the first electrode over almost the entire length of the first electrode. The second electrode is made of an electrically insulating material. The plurality of spacers formed are suspended from the first electrode at a predetermined interval, and a ground line is connected to the second electrode.

  By setting it as such a structure, the said 1st electrode and the said 2nd electrode are hold | maintained at predetermined intervals over these full length, and the insulating layer by air is formed between both.

  For example, when a thundercloud in which negative charges are distributed on the cloud bottom approaches, the opposite charge (plus charge) is distributed on the surface of the ground, and the grounded second electrode is attracted to the negative charge on the cloud bottom. As a result, positive charges are collected.

Then, the 1st electrode arrange | positioned through an insulator is tinged with a negative charge by the effect | action of a capacitor | condenser.
This action makes it difficult to generate upward streamers in the first electrode and its surroundings, and can suppress the occurrence of lightning strikes.

  On the other hand, since the first electrode and the second electrode are formed in a linear shape, the above-described protective region that suppresses the occurrence of lightning strikes in the length direction of the first electrode on both sides of the first electrode. It is formed in a strip shape so as to extend.

  Therefore, by adjusting the installation form of the first electrode and the second electrode, for example, the installation length, the installation shape in plan view, etc., the above-described protection region formed by these can be freely formed. .

  As a result, the protection area can be set in accordance with the protection target to be protected, and an optimal protection area can be formed for the protection target.

  In addition, a lightning-suppressing lightning arrester is suspended from the first electrode, which is provided between the supports via a connector made of an electrically insulating material, with a plurality of spacers made of an electrically insulating material. By installing and configuring, a necessary insulating layer can be formed by air between the first electrode and the second electrode, and a lightning suppression type lightning arrester is constructed with a very simple configuration. It is possible to improve the workability.

  On the other hand, a general power transmission facility is provided with a power transmission path in which a transmission line is supported by a number of steel towers. In this power transmission path, in order to guide lightning strikes to the ground via the steel tower, the top of adjacent steel towers is arranged. An imaginary ground wire is installed in

  Therefore, the aerial ground wire is used as the second electrode, the first electrode is arranged above the second electrode, and both ends thereof are erected between the tops of the steel towers via a connector made of an electrically insulating material. In addition, a lightning suppression type lightning arrester can be constructed by connecting the overhead ground wire to the first electrode with a plurality of spacers.

  Alternatively, it is also possible to suppress lightning strikes between the towers by replacing the overhead ground wire with the steel tower so as to be electrically insulated to form the first electrode, and separately installing the second electrode below the first electrode. A type lightning arrester can be constructed.

  Therefore, it is possible to construct a lightning suppression type lightning arrester using existing equipment.

  The spacer comprises an upper grip body fitted to the first electrode from above and a lower grip body fitted to the second electrode from below, the upper grip body and the lower grip body. The upper gripping body and the lower gripping body are connected to each other by being engaged with each other in the vertical direction and engaging with the concave and convex engaging pieces formed in these fitting portions. it can.

  With such a configuration, the upper gripping body and the lower gripping body are fitted to the first electrode and the second electrode, respectively. By engaging with each other, the first electrode and the second electrode can be connected in a predetermined relative positional relationship.

  Thus, the fitting work between the upper gripping body and the first electrode, the fitting work between the lower gripping body and the second electrode, and the engagement work between the upper gripping body and the lower gripping body. Both electrodes can be installed by such a simple operation.

  In addition, the upper gripping body is formed in an inverted U shape that opens downward, and has a widened portion having an inner diameter substantially equal to the outer diameter of the first electrode at the bottom thereof. It can be set as the structure by which the aperture | diaphragm | squeeze part which has a width | variety smaller than the outer diameter of a said 1st electrode was provided in the site | part from a diameter part to the said opening.

  With such a configuration, the upper electrode can be temporarily fixed to the first electrode by fitting the first electrode to the enlarged diameter portion. Can be made smooth.

  Such a configuration can also be adopted in the relationship between the lower gripping body and the second electrode.

  According to the lightning suppression type lightning arrester of the present invention, it is possible to easily form lightning protection regions corresponding to various protected objects.

It is a schematic front view of the power transmission path where the 1st Embodiment of this invention was applied. It is a perspective view which shows a part of spacer in the 1st Embodiment of this invention. It is a perspective view which shows a part of spacer in the 1st Embodiment of this invention. It is a perspective view which shows the connection procedure of the spacer in the 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a first embodiment of the present invention and is a perspective view illustrating a state in which spacers are connected. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a first embodiment of the present invention and is a front view illustrating a state in which spacers are connected. It is the schematic for demonstrating the streamer generation | occurrence | production suppression effect | action in this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes a lightning suppression type lightning arrester (hereinafter abbreviated as a lightning arrester) according to this embodiment, which is applied to a power transmission path.

  This lightning arrester 1 is provided between steel towers 2 of the power transmission path constituting the support, and is formed between the steel towers 2 via a connecting tool 3 made of an electrically insulating material. A first electrode 4 and a linear second electrode 5 disposed along the first electrode 4 are provided below the first electrode 4, and the second electrode 5 is made of an electrically insulating material. A plurality of spacers 6 are formed so as to be suspended from the first electrode 4 at a predetermined interval, and a ground line 7 is connected to the second electrode 5.

  More specifically, the connector 3 is formed by, for example, an insulator, and each end of the first electrode 4 is connected to a tip of the pair of steel towers 2, thereby connecting the first electrode to the end. The two towers 2 are constructed in an electrically insulated state.

  The second electrode 5 is formed in a linear shape like the first electrode 4, and in the present embodiment, the second electrode 5 is formed to have substantially the same length as the first electrode 4.

  The second electrode 5 is maintained at a predetermined distance from the first electrode 4 by a plurality of spacers 6 arranged at intervals in the length direction, and the first electrode 4 It is erected so as to follow.

  The second electrode 5 is connected to the ground line 7 at one end thereof, and is grounded to the ground via the ground line 7.

  The spacer 6 is made of, for example, a material having electrical insulation and a little elasticity such as natural rubber or synthetic resin.

  The spacer 6 includes an upper grip body 8 fitted to the first electrode 4 from above, and a lower grip body 9 fitted to the second electrode 5 from below, and these The upper gripping body 8 and the lower gripping body 9 are fitted in the vertical direction, and the upper gripping body 8 and the lower gripping body 9 are engaged by engagement of the concavo-convex engaging pieces 8a and 9a formed in these fitting portions. The lower grips 9 are connected and integrated with each other.

  Further, as shown in FIG. 2, the upper gripping body 8 is formed in an inverted U shape that opens downward, and has a diameter-enlarged portion having an inner diameter substantially equal to the outer diameter of the first electrode 4 at the bottom. 8b is provided, and a diaphragm portion 8c having a width smaller than the outer diameter of the first electrode 4 is provided at a portion from the enlarged diameter portion 8b to the opening.

  Further, the lower holding body 9 is formed in a U-shape that opens upward, and at its bottom is provided with an enlarged diameter portion 9b having an inner diameter substantially equal to the outer diameter of the second electrode 5. A diaphragm portion 9c having a width smaller than the outer diameter of the second electrode 5 is provided at a portion from the enlarged diameter portion 9b to the opening.

  After the first electrode 4 is pushed into the upper gripping body 8 while being pushed into the throttle portion 8c of the upper gripping body 8 while expanding the throttle portion 8c against its elasticity, It is made to detach | leave and is located in the said enlarged diameter part 8b (refer FIG. 2 and FIG. 4).

  In this manner, the first electrode 4 is moved to the enlarged diameter portion 8b, and at the same time, the throttle portion 8c is returned to its original position by elasticity, and its width is larger than the outer diameter of the first electrode 4. Is also narrowed.

In this state, the first electrode 4 is prevented from being detached from the upper gripping body 8.
Here, if the inner diameter of the enlarged diameter portion 8b is made slightly smaller than the outer diameter of the first electrode 4, the inner wall of the enlarged diameter portion 8b can be crimped to the peripheral surface of the first electrode 4. These can be integrated by the frictional force.

  The narrowed portion 8c of the upper grip 8 is formed to be inclined so as to gradually expand toward the opening, and a plurality of the concave and convex engaging pieces 8a are formed on both opposing inner surfaces.

  These concavo-convex engaging pieces 8 a are formed along a direction substantially orthogonal to the insertion direction of the first electrode 4.

  After the second electrode 5 is pushed into the lower gripping body 9 by being pushed into the throttle portion 9c of the lower gripping body 9 while expanding the throttle portion 9c against its elasticity, It is made to detach | leave and is located in the said enlarged diameter part 9b (refer FIG. 3 and FIG. 4).

  In this way, the second electrode 5 is moved to the enlarged diameter portion 9b, and at the same time, the throttle portion 9c is returned to its original position by elasticity, and its width is larger than the outer diameter of the second electrode 5. Is also narrowed.

In this state, the second electrode 5 is prevented from being detached from the lower holding body 9.
Here, if the inner diameter of the enlarged diameter portion 9 b is slightly smaller than the outer diameter of the second electrode 5, the inner wall of the enlarged diameter portion 9 b can be crimped to the peripheral surface of the second electrode 5. These can be integrated by the frictional force.

  In addition, both the outer surfaces of the narrowed portion 9c of the lower gripping body 9 are formed so as to be gradually narrowed toward the opening of the lower gripping body 9, so that the narrowed portion 9c While being able to be inserted into the narrowed portion 8c of the body 8, a plurality of the concave and convex engaging pieces 9a are formed on the outer surfaces thereof.

  These uneven engagement pieces 9 a are formed along a direction substantially orthogonal to the insertion direction of the second electrode 5.

  As shown in FIG. 4, the upper gripping body 8 mounted on the first electrode 4 and the lower gripping body 9 mounted on the second electrode 5 are arranged as shown in FIG. By inserting the 9c side into the narrowed portion 8c of the upper gripping body 8 and engaging the concave and convex engaging pieces 8a and 9a, they are integrated as shown in FIGS.

As described above, when the upper gripping body 8 and the lower gripping body 9 are integrated, the second electrode 5 is installed along the first electrode 4 below the first electrode 4. Is done.
In addition, the spacing between the first electrode 4 and the second electrode 5 is held substantially constant by the plurality of spacers 6.

  Then, as shown in FIG. 1, a number of upper grips 8 are mounted at predetermined intervals on the first electrode 4 installed between the steel towers 2, and the upper grips 8 are The lower gripping body 9 attached to the second electrode 5 is sequentially engaged and connected, and the grounding wire 7 is connected to the second electrode 5 so that the lightning arrester 1 is placed on the upper part of the power transmission path. Can be installed.

  The lightning arrester 1 according to the present embodiment installed in this way has a very simple configuration because the first electrode 4 and the second electrode 5 are insulated mainly by air.

  In addition to being simple in construction, since the first electrode 4 and the second electrode 5 can be connected with the spacer 6 at the time of installation, the workability is also good. .

  Next, the lightning suppression function by the lightning arrester 1 of this embodiment installed in this way will be described with reference to the schematic diagram shown in FIG.

  When the thundercloud C in which negative charges are distributed on the cloud bottom approaches, the opposite charge (plus charge) is distributed on the surface of the ground G, and is attracted to the negative charge on the cloud bottom and is also charged to the second electrode 5. Will gather.

On the other hand, the 1st electrode 4 arrange | positioned through an insulator is tinged with a negative charge by the effect | action of a capacitor | condenser.
Due to this action, an upward streamer is unlikely to occur in the first electrode 4 and its periphery, and as a result, the occurrence of lightning strikes is suppressed.

  Thus, the area where lightning is prevented from being generated by the first electrode 4, that is, the lightning protection area is a predetermined range on both sides of the first electrode 4 in the length direction of the first electrode 4 in plan view. It is formed in an extending strip shape.

  As described above, the lightning protection region is formed based on the construction of the first electrode 4.

  Therefore, by setting the erection form of the first electrode 4 corresponding to the object to be protected, it is possible to set an optimum lightning protection region for the object to be protected.

  For example, the lightning strike protection region can be freely set by changing the length of the first electrode 4, bending it in a plan view, or installing it in a zigzag manner.

  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, in the said embodiment, although the example which installed the lightning arrester 1 between the towers 2 of a power transmission path was shown, it replaces with this, for example, installs a support body in the waist wall provided on the roof of a building. And it is also possible to install between these support bodies.

1 (Lightning suppression type) Lightning arrester 2 Steel tower (support)
3 connector 4 first electrode 5 second electrode 6 spacer 7 grounding wire 8 upper gripping body 8a uneven engagement piece 8b enlarged diameter part 8c narrowing part 9 lower gripping body 9a uneven engagement piece 9b enlarged diameter part 9c narrowing part C thundercloud G Earth

Claims (4)

A linear first electrode erected between the supports erected at an interval via a connector made of an electrically insulating material, and below the first electrode, along the first electrode. A linear second electrode disposed over substantially the entire length of the first electrode, and the second electrode is spaced apart from the first electrode by a plurality of spacers formed of an electrically insulating material. A lightning-suppressing lightning arrester characterized in that the lightning-suppressing lightning arrester is provided with a ground wire connected to the second electrode.   The spacer comprises an upper grip body fitted to the first electrode from above and a lower grip body fitted to the second electrode from below, the upper grip body and the lower grip body. The upper gripping body and the lower gripping body are connected to each other by being engaged with each other in the vertical direction and engaging with the concave and convex engaging pieces formed in these fitting portions. The lightning-reducing lightning arrester according to claim 1.   The upper gripping body is formed in an inverted U shape that opens downward, and has a diameter-enlarged portion having an inner diameter substantially equal to the outer diameter of the first electrode at the bottom thereof. The lightning-suppressing type lightning arrester according to claim 2, wherein a throttle part having a width smaller than the outer diameter of the first electrode is provided at a part from the part to the opening.   The lower gripping body is formed in a U-shape that opens upward, and has an enlarged diameter portion having an inner diameter substantially equal to the outer diameter of the second electrode at the bottom thereof. The thunder suppression lightning arrester according to claim 2, wherein a throttle portion having a width smaller than the outer diameter of the second electrode is provided at a portion extending from the opening to the opening.