A lightning-proof and explosion-proof insulator
A technology of insulators and insulating jackets, which is applied in the field of power electronic devices, can solve the problems of guiding pressure release, inability to guarantee, and easy falling off of fittings, and achieve the effect of preventing the fittings from being broken.
Active Publication Date: 2017-12-15
STATE GRID SHANDONG ELECTRIC POWER +2
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Problems solved by technology
[0004] Therefore, the technical problem to be solved by the present invention is to overcome the excessive internal pressure of the lightning protection insulator body in the prior art, which causes the deformation of the epoxy cylinder, cannot ensure the engagement of the fittings and the epoxy barrel, and causes the fittings to fall off easily and not penetrate. The pressure release hole cannot guarantee the correct guidance of the pressure release, resulting in the defect that the lightning protection insulator is damaged
Method used
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Embodiment Construction
[0020] A lightning-proof and explosion-proof insulator provided in this embodiment, such as figure 1 as shown, figure 2 yes figure 1 top view of figure 1 It includes upper fitting 11, lower fitting 12, epoxy cylinder 13, insulating jacket 14, gap cylinder 15, nonlinear current limiting element 16, fixing bolt 17, pressure release hole 18, arc strike ring 19 and seal 20.
[0021] Wherein, the upper fitting 11 is a wiring electrode, the lower fitting 12 is a grounding electrode, the epoxy barrel 13 is arranged inside the insulating jacket 14, and a gap barrel 15 is arranged inside the epoxy barrel 13. The top / bottom ends of the gap cylinder 15 are respectively provided with a first tapered copper sheet and a second tapered copper sheet, and a non-linear current limiting element 16 is arranged below the second tapered copper sheet, and the insulating jacket 14 can be Insulating material, in this embodiment, a silicone rubber jacket is preferred.
[0022] The epoxy cylinder 1...
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Abstract
The invention provides a lightning-protection and explosion-proof insulator. The lightning-protection and explosion-proof insulator comprises an upper hardware fitting, a lower hardware fitting, an epoxy barrel and an insulating outer sleeve, wherein the upper hardware fitting and the lower hardware fitting are of a wiring electrode and a grounding electrode respectively; the epoxy barrel is arranged in the insulating outer sleeve; a gap barrel is arranged in the epoxy barrel; a first tapered copper piece and a second tapered copper piece are arranged at the top and bottom of the gap barrel respectively; a nonlinear limiting element is arranged under the second tapered copper piece; the lightning-protection and explosion-proof insulator further comprises pressure releasing holes; at least two symmetrical pressure releasing holes penetrating through the wall of the epoxy barrel are formed in the wall of the epoxy barrel; and sealing parts for backfilling are arranged in the pressure releasing holes.
Description
technical field [0001] The invention relates to a power electronic device, in particular to a lightning-proof and explosion-proof insulator. Background technique [0002] Lightning protection insulators are used in overhead lines to connect overhead insulated wires or bare wires to the metal fittings of tension rods or corner rods, so as to tighten and insulate the overhead wires to prevent lightning breakage and reduce lightning tripping faults. type structural insulators. At present, the composite post-type lightning protection insulator is composed of an inner gap group connected in series with a zinc oxide resistance sheet and an inner electrode, the outside is covered with a silicone rubber jacket, the upper end fittings are electrodes, and the lower end mounting bolts are grounded through metal brackets or wires. When the lightning protection insulator with this structure is struck by multiple or direct lightning strikes, the gas inside the insulator will expand rapid...
Claims
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IPC IPC(8): H01B17/38H01B17/46H01B17/14
CPCH01B17/14H01B17/38H01B17/46
Inventor 李延真董啸贾旭崔潇
Owner STATE GRID SHANDONG ELECTRIC POWER