Lightning protection electrical verification puncturing grounding ring
Technical field
The utility model belongs to the electric armour clamp technical field, is specifically related to a kind of lightning protection electrical verification puncturing grounding ring.
Background technology
For reducing the overhead distribution fault that reasons such as branch, birds, accumulated snow cause, improve power supply reliability.Developed country gradually adopts suspended insulated guide wire from the later stage in the sixties in the world.China begins city overhead distribution net from the eighties and implements the insulating transformation.
Insulated conductor has solved corridor and safety problem that plain conductor can't resolve really, compares with cable, reduced investment, builds soon, and advantage is obvious, but the lightning-caused breaking problem is very outstanding.
The lightning-caused breaking principle of insulated conductor is different with plain conductor, and when direct lightning strike or lightning induced voltage acted on insulated conductor, lightning overvoltage at first punctured wire insulation, and then causes insulator arc-over, and breakdown insulating barrier is the pin hole shape.The short arc current of continuous frequency receives the obstruction that insulate on every side, and the arc root can only the burning at the pin hole place, will be at extremely short time inside conductor by neat blowing, thus cause the disconnection of electrical network, influence the operate as normal of power transmission network.
Therefore, the lightning protection of extensively adopting both at home and abroad strikes off the line measure and on insulated conductor, installs the lightning protection gold utensil exactly additional.But the structure of existing lightning protection penetrating cable clamp is not satisfactory, remains and is needing improvements badly.
Summary of the invention
The purpose of the utility model provides the lightning protection electrical verification puncturing grounding ring that a kind of structure is comparatively reasonable, have better lightning protection effect.
The technical scheme that realizes the utility model purpose is: a kind of lightning protection electrical verification puncturing grounding ring; Comprise penetrating cable clamp base, penetrating cable clamp loam cake, be used for the square drainage framework that is fixed on the penetrating cable clamp loam cake bolt assembly on the penetrating cable clamp base and is fixed on penetrating cable clamp base bottom; One jiao of place of said square drainage base of frame is provided with the striking ball; The middle body away from the base of penetrating cable clamp base of said square drainage framework is exposed in the atmosphere, is arranged with insulating sleeve on said all the other positions of square drainage framework and the striking ball outer wall.
In the technique scheme, the striking ball is all passed on two limits that said square drainage framework links to each other with the striking ball.
The utlity model has positive effect:
(1) the utility model is provided with square drainage framework and striking ball in the penetrating cable clamp bottom, when thunder and lightning takes place, discharges between striking metal ball and the ground plate, the afterflow power frequency arc is moved on the striking metal ball burn, thereby the protection insulated conductor is injury-free.In addition, in the utility model the striking ball that the position is set is comparatively reasonable, have drainage lightning protection effect preferably.
Description of drawings
Fig. 1 is a kind of perspective view of the utility model;
Fig. 2 is a kind of partial sectional view of lightning protection electrical verification puncturing grounding ring shown in Figure 1.
Reference numeral is: penetrating cable clamp base 1, penetrating cable clamp loam cake 2, bolt assembly 3, drainage framework 4, base 41, striking ball 5, insulating sleeve 6.
Embodiment
(embodiment 1)
Fig. 1 and Fig. 2 have shown a kind of embodiment of the utility model, and wherein Fig. 1 is a kind of perspective view of the utility model; Fig. 2 is a kind of partial sectional view of lightning protection electrical verification puncturing grounding ring shown in Figure 1.
Present embodiment is a kind of lightning protection electrical verification puncturing grounding ring used when power circuitry engineering is constructed; See Fig. 1; Comprise penetrating cable clamp base 1, penetrating cable clamp loam cake 2, be used for the square drainage framework 4 that is fixed on penetrating cable clamp loam cake 2 bolt assembly 3 on the penetrating cable clamp base 1 and is fixed on penetrating cable clamp base 1 bottom; One jiao of place, said square drainage framework 4 bottoms is provided with striking ball 5; The middle body away from the base 41 of penetrating cable clamp base 1 of said square drainage framework 4 is exposed in the atmosphere, is arranged with insulating sleeve 6 on said square drainage framework 4 all the other positions and striking ball 5 outer walls.Striking ball 5 spheroids are all passed on two limits that said square drainage framework 4 links to each other with striking ball 5.
Because the middle body of said square drainage framework base framework is the position that exposes, when maintenance, can be used as the usefulness of ground connection, electrical verification, it is comparatively convenient to operate.
Present embodiment is provided with square drainage framework and striking ball in the penetrating cable clamp bottom, when thunder and lightning takes place, discharges between striking metal ball and the ground plate, the afterflow power frequency arc is moved on the striking metal ball burn, thereby the protection insulated conductor is injury-free.In addition, in the utility model the striking ball that the position is set is comparatively reasonable, have drainage lightning protection effect preferably.
Obviously, the foregoing description of the utility model only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these connotations that belong to the utility model are extended out or change still belong to the protection range of the utility model.