CN103151124A - Spool-type lightning insulator for low-voltage distribution line with external series spark gap - Google Patents
Spool-type lightning insulator for low-voltage distribution line with external series spark gap Download PDFInfo
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- CN103151124A CN103151124A CN2013100741254A CN201310074125A CN103151124A CN 103151124 A CN103151124 A CN 103151124A CN 2013100741254 A CN2013100741254 A CN 2013100741254A CN 201310074125 A CN201310074125 A CN 201310074125A CN 103151124 A CN103151124 A CN 103151124A
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Abstract
The invention relates to a spool-type lightning insulator for a low-voltage distribution line with an external series spark gap. The spool-type lightning insulator comprises two porcelain pieces, a fastening bolt and a resistor assembly, wherein the two porcelain pieces are straight halved to form a circumferential gap with a Y-direction height and an X-direction width, and a conductor is arranged outside the circumferential gap; the resistor assembly is included in the two porcelain pieces and positioned at the inner side of the circumferential gap, and the circumferential gap between the conductor and the resistor assembly forms a spark gap; the conductor and the resistor assembly form two electrodes of the spark gap, and the fastening bolt is vertical to the width direction of the circumferential gap and penetrates through the central axes of the two porcelain pieces and the resistor assembly to fasten the two porcelain pieces and the resistor assembly; and an adhesive is arranged among the porcelain pieces, the resistor assembly and the fastening bolt. The spool-type lightning insulator provided by the invention is suitable for the low-voltage distribution line, is universally used with the traditional line structure and fittings, and is convenient and quick to install and maintain; and the maintenance is avoided, the failure rate is low, and the power transmission of the line is not affected even if the failure occurs.
Description
Technical field
The present invention relates to a kind of lightning protection insulator, specifically, relate to a kind of spool-type lightning protection insulator that is applicable to guest performer's discharging gap of low-voltage distributing line.
Background technology
Low-voltage distributing line (220V/380V) never has effective lightning protection measures, and this does not conform to the present situation that rapid economic development, power demands increase at present, a large amount of intelligent electric appliance enters the user, power supply reliability requires to improve.Trace it to its cause, there is no applicable line thunder protection product is main cause:
1. existing low-voltage distribution lightning-protected product reliability is not high, can not accomplish less trouble and non-maintaining.When it damages, both can affect the circuit power transmission, will spend again a large amount of manpower and materials and time to fix a breakdown, not be suitable for line thunder protection protection.
1.1 porcelain overcoat or composite sheath low pressure arrester without gaps can not produce obvious fault point and switch trip during the damage of image height pressure lightning arrester, but can cause continuation earth fault in case damage punctures, consuming a large amount of electric energy also may initiation fire.
1.2 because certain pressure drop is arranged, this pressure drop may surpass the residual voltage of low voltage surge arrester to traditional lightning arrester, is not suitable for low voltage surge arrester with heat-explosion type disconnector.Though and the hot melten type release unit does not have this problem; but the action blind area is arranged: as very large in moment of fault current; resistor disc punctures; form the carbonization passage; disconnector forms tripping with regard to losing thermal source; and the SPD(Surge Protector) significantly do not expose electrical break point with the hot melten type disconnector, with more difficult discovery fault point on the line.
1.3SPD be only suitable for being contained in switch-box, be not suitable for being contained in circuit.Protect with low voltage surge arrester and on the insulator limit, the complex structure cost is high, and is outdated.
2. the requirement (GB11032) of existing lightning arrester GB to low voltage surge arrester, main electrical characteristic parameter regulation is less than normal, only has 1.5kA as nominal discharge current; The 2ms square wave only has 50A; The 4/10 large electric current of μ s is 10kA, is not suitable for the line thunder protection requirement.
3. the same with arrester without gaps, in band, the low voltage surge arrester in string gap in case damage can form the continuation fault earthing, affects the circuit power transmission.And external serial gap is used for low-pressure system because of the discharge parameter reason, the minimum and difficult configuration of clearance distance, and being subject to extraneous factor affects and changes.
Low-voltage distributing line should possess and satisfy following the requirement with lightning-protected product:
1. can be general with existing line construction form and gold utensil, directly replace the existing line insulator, and the Lightning Over-voltage of releasing, cut off the power frequency continued flow ability, can bear the required mechanical force of insulator; Possess the required creepage distance of line insulation, electrical insulation properties and weather ability.
2. can accomplish non-maintaining and less trouble; Even if do not affect the circuit power transmission during fault yet.Should be with external serial gap, the damage even if lightning arrester body makes moist, the external serial gap insulation is unaffected.But dual fail-safe like this: resistor disc damages, and external serial gap shielding system power-frequency voltage is arranged, and does not affect power transmission.Otherwise just in case the gap is because of certain reason short circuit, resistor disc can be born separately system voltage chronically.
3. for not being shaft tower in the middle of the circuit of house lead in, should have self-protection, from the clamper function, can take full advantage of the shaft tower natural grounding overvoltage energy of releasing, do not need Special grounding.This be because Special lightning protection earth connection setup cost far above lightning-protected product itself, and poor reliability has unsafe factor in case break.
To the house lead in shaft tower, can establish Special grounding wire, cross-arm current potential when reducing thunderbolt, being beneficial to can be with the Lightning Over-voltage interception of absolutely large section out of doors.Can to might house lead in, energy direct thunder greatly, play the slicing effect, alleviate the pressure of indoor SPD.
Leakage conductor be to be directly proportional to the height (the namely size of flash-over characteristic parameter) of electric pressure with guest performer's discharging gap distance, be about 50mm as the leakage conductor discharging gap g distance of 10kV.The low-voltage distributing line lightning arrester, by its flash-over characteristic and insulation coordination, clearance distance only has several millimeters.As pressing traditional high-voltage line lightning arrester (10kV surge arrester with external series gaps as shown in Figure 1), it comprises lightning arrester body 81, its lower end has the lead-in wire 82 of composite sheath and connects wire, be provided with discharging gap ball 83 and lower sparking electrode 84 on lightning arrester body 81, be formed with guest performer's discharging gap g between both.Design in such a way as the low-voltage circuit lightning arrester, its external serial gap natural formation setting is difficulty and loaded down with trivial details comparatively, and cost is high, and Yi Beiyu, ice and snow and the short circuit of toy institute, is subject to external force and is out of shape.Therefore need a kind of brand-new lightning protection insulator that guest performer's discharging gap is arranged that is applicable to low-voltage distributing line of design.
Summary of the invention
The purpose of this invention is to provide the spool-type lightning protection insulator that a kind of versatility is strong, can accomplish non-maintaining and less trouble, the guest performer's discharging gap that is applicable to low-voltage distributing line that reliability is high.
For achieving the above object, the technical solution used in the present invention is:
A kind of low-voltage distributing line of the guest performer's of having discharging gap spool-type lightning protection insulator is installed on low-voltage distributing line, and it comprises two porcelain pieces, fastening bolt, resistor disc assembly;
The be involutory circumferential gap of the width that arranges and form height with Y-direction and directions X of two described porcelain pieces, wire is arranged at the outside of described circumferential gap; Described resistor disc assembly by inclusion within two described porcelain pieces and be positioned at the inboard of described circumferential gap; The end face direction of described resistor disc assembly parallels with the Width of described circumferential gap and near described porcelain piece, the lateral surface of described resistor disc assembly is near described circumferential gap; Described circumferential gap between described wire and described resistor disc assembly forms a discharging gap, and described wire and described resistor disc assembly form two electrodes of described discharging gap;
Described fastening bolt is perpendicular to the Width setting of described circumferential gap, and described fastening bolt runs through the place, axis that is arranged at two described porcelain pieces and described resistor disc assembly and two described porcelain pieces and described resistor disc assembly is fastened, and is provided with adhesive between described porcelain piece, described resistor disc assembly, described fastening bolt.
Preferably, described resistor disc assembly is the axle center and has the cylindric of the first through hole, the inner cylinder face that it has two described end faces of opposing parallel and forms the external cylindrical surface of its outer peripheral face and form described the first through hole;
Described resistor disc assembly comprises outer ring electrode, interior ring electrode, ring resistance sheet; Described ring resistance sheet is the axle center and has the cylindric of the second through hole and axis that axis described ring resistance chip module is described resistor disc assembly; Described ring resistance sheet have opposing parallel two annulars the cross section and form the outer circumference surface on its periphery face of cylinder and form the inner peripheral surface on the face of cylinder of described the second through hole; One end of described outer ring electrode electrically contacts with a described cross section of described ring resistance sheet and is connected, and the other end of described outer ring electrode forms the external cylindrical surface of described resistor disc assembly; One end of described interior ring electrode electrically contacts with another described cross section of described ring resistance sheet and is connected, and the other end of described interior ring electrode forms the inner cylinder face of described resistor disc assembly; Be filled with insulation filling glue between described outer ring electrode, described interior ring electrode, described ring resistance sheet.
Preferably, described outer ring electrode comprises the first vertically part and the first horizontal component of perpendicular setting, described the first horizontal component near described first vertically the upper end of part arrange and have the first distance apart from described upper end; Described interior ring electrode comprises the second vertical part and the second horizontal component of perpendicular setting, described the second horizontal component arranges and has second distance apart from described bottom near the bottom of the described second vertical part, and described the first horizontal component is connected and covers described cross section fully with two described cross sections of described ring resistance sheet respectively with described the second horizontal component.
Preferably, described the first distance equals described second distance;
The insulation filling glue of filling between described outer ring electrode, described interior ring electrode, described ring resistance sheet forms two end faces of described resistor disc assembly, and the top of described the first horizontal component is coated with thickness and the described first equidistant described insulation filling glue, and the below of described the second horizontal component is coated with the described insulation filling glue that thickness equates with described second distance.
Preferably, dividing by the first vertical portion of described outer ring electrode the diameter of section that forms described external cylindrical surface is the great circle internal diameter, and it is the circular hole of roundlet internal diameter that the end of the first horizontal component of described outer ring electrode forms diameter; Dividing the diameter of section of the described inner cylinder face that forms by the second vertical portion of described interior ring electrode is the roundlet external diameter, and it is the circumference of great circle external diameter that the end of the second horizontal component of described interior ring electrode forms diameter; The end of the first horizontal component of described outer ring electrode is mutually concordant with the inner peripheral surface of described ring resistance sheet, and the end of the second horizontal component of described interior ring electrode is mutually concordant with the outer circumference surface of described ring resistance sheet.
Preferably, the first insulation distance of the formation between the outer circumference surface of the internal side diameter of the external cylindrical surface of described resistor disc assembly and described ring resistance sheet is more than or equal to the thickness of described ring resistance sheet, and the second insulation distance that forms between the inner peripheral surface of the inner cylinder face of described resistor disc assembly and described ring resistance sheet is more than or equal to the thickness of described ring resistance sheet.
Preferably, described fastening bolt comprises the screw rod that runs through described porcelain piece and described resistor disc assembly, the two ends that are threaded onto respectively described screw rod and two nuts that described porcelain piece and described resistor disc assembly are clamped.
Preferably, it is installed on the cross-arm of low-voltage distributing line or on anchoring; Described cross-arm or described anchoring are connected with described fastening bolt.
Operation principle of the present invention is: this spool-type lightning protection insulator is installed on the line, as is arranged on cross arm of tower, and conducting wire binding is in the involutory circumferential gap outside of two porcelain pieces.When thunderbolt, (wire is if any insulating barrier along wire disruptive discharge gap for lightning current, first puncture insulating barrier), the air in the gap was ionized and became conduction state this moment, and electric current dodges to iron and enters resistor disc assembly ground connection and the overvoltage energy of releasing after fastening bolt again.After lightning current, resistor disc component recovery high resistant and cut off power frequency continued flow, the air combined discharging gap that makes of ionization recovers insulation, thereby avoids switch trip and circuit scaling loss.
Use due to technique scheme, the present invention compared with prior art has following advantages: spool-type lightning protection insulator of the present invention is applicable to low-voltage distributing line, and itself and existing line construction and gold utensil are general, install and safeguard convenient; And it can accomplish non-maintaining and less trouble, also can not affect the circuit power transmission even it breaks down.
Description of drawings
Accompanying drawing 1 is the schematic diagram of existing 10kV surge arrester with external series gaps.
Accompanying drawing 2 is the structure cutaway view that the low-voltage distributing line use spool-type lightning protection insulator of guest performer's discharging gap is arranged of the present invention.
Accompanying drawing 3 has the low-voltage distributing line of guest performer's discharging gap with the structure cutaway view of the resistor disc assembly of spool-type lightning protection insulator for of the present invention.
Accompanying drawing 4 is the scheme of installation that the low-voltage distributing line use spool-type lightning protection insulator of guest performer's discharging gap is arranged of the present invention.
Accompanying drawing 5 is the scheme of installation that the low-voltage distributing line use spool-type lightning protection insulator of guest performer's discharging gap is arranged of the present invention.
In above accompanying drawing: 1, porcelain piece; 2, fastening bolt; 3, resistor disc assembly; 31, outer ring electrode; 32, interior ring electrode; 33, ring resistance sheet; 34, insulation filling glue; 4, adhesive; 5, wire; 6, cross-arm; 7, anchoring; 81, lightning arrester body; 82, composite insulator; 83, upper discharging gap ball; 84, lower sparking electrode.
Embodiment
The invention will be further described below in conjunction with embodiment shown in the drawings.
Embodiment one: shown in accompanying drawing 2.A kind of low-voltage distributing line of the guest performer's of having discharging gap spool-type lightning protection insulator is installed on low-voltage distributing line.
This spool-type lightning protection insulator comprises two porcelain pieces 1, fastening bolt 2, nonlinear resistor disc assembly 3.
The be involutory circumferential gap of the width that arranges and form height with Y-direction and directions X of two porcelain pieces 1, wire 5 use binding wires are tied up the outside at circumferential gap.Resistor disc assembly 3 by inclusion within two porcelain pieces 1 and be positioned at the inboard of circumferential gap.The end face direction of resistor disc assembly 3 parallels with the Width (directions X) of circumferential gap and near porcelain piece 1, the lateral surface of resistor disc assembly 3 is near circumferential gap.Circumferential gap between wire 5 and resistor disc assembly 3 forms a guest performer discharging gap g(X direction), wire 5 and resistor disc assembly 3 form two electrodes of discharging gap.Porcelain piece 1 plays a part the insulation of two electrodes, support, fixing.This discharging gap g distance is that design is fixing, is to be made of the electrotechnical ceramics insulating supporting, and the calcination repeatedly of anti-electric arc can not change because of climate temperature, the impact of extraneous power.The distance of discharging gap g is set to can tolerate the maximum power-frequency voltage of 2 times of circuits when normal operation; Resistor disc assembly 3 does not bear voltage, can be not aging, deteriorated because bearing for a long time system voltage.Even if resistor disc assembly 3 damages short circuit, gap g can isolate power-frequency voltage, can not send because of its short circuit not power on.The width of circumferential gap (directions X) determines the size of discharging gap distance and discharge parameter.The height of circumferential gap (Y-direction) does not affect discharge parameter, as long as the conducting wire binding line does not embed in this gap.
Fastening bolt 2 arranges perpendicular to the Width (directions X) of circumferential gap, and it comprises screw rod and two nuts.Fastening bolt 2 runs through the place, axis that is arranged at two porcelain pieces 1 and resistor disc assembly 3 and two porcelain pieces 1 and resistor disc assembly 3 is fastened.Be provided with adhesive 4 between porcelain piece 1, resistor disc assembly 3, fastening bolt 2.
Adhesive 4 is an inner void-free integral body with two porcelain pieces 1 and resistor disc assembly 3 gummeds, plays the lightning protection insulator inner sealing, covers resistor disc assembly 3, strengthens the side insulation effect of resistor disc.Two porcelain pieces 1 are involutory, and resistor disc assembly 3 inclusions interior, are added the effect of adhesive 4, make resistor disc assembly 3 not affected by extraneous climatic factor.Discharging gap g is the shielding system power-frequency voltage effectively, and when preventing 3 damage of resistor disc assembly, circuit send and do not power on.
Shown in accompanying drawing 3.Resistor disc assembly 3 is the axle center and has the cylindric of the first through hole, and its thickness is E2, the inner cylinder face that it has two end faces of opposing parallel and forms the external cylindrical surface of its outer peripheral face and form the first through hole.
Outer ring electrode 31 comprises the first vertically part and the first horizontal component of perpendicular setting, the first horizontal component near first vertically part the upper end setting and have first apart from F1 apart from the upper end.This end of the first horizontal component of outer ring electrode 31 electrically contacts with a cross section of ring resistance sheet 33 and is connected, and the first horizontal component covers this cross section fully.This end of the first vertical part of outer ring electrode 31 forms the external cylindrical surface of resistor disc assembly 3.Dividing by the first vertical portion of outer ring electrode 31 diameter of section that forms external cylindrical surface is great circle internal diameter A, and it is the circular hole of roundlet internal diameter B that the end of the first horizontal component of outer ring electrode 31 forms diameter.The end of the first horizontal component of outer ring electrode 31 is mutually concordant with the inner peripheral surface of ring resistance sheet 33.
Interior ring electrode 32 comprises the second vertically part and the second horizontal component of perpendicular setting, the second horizontal component near second vertically part the bottom setting and have second distance F2 apart from the bottom.This end of the second horizontal component of interior ring electrode 32 electrically contacts with another cross section of ring resistance sheet 33 and is connected, and the second horizontal component covers this cross section fully, interior ring electrode 32 second vertically this end of part form the inner cylinder face of resistor disc assembly 3.Dividing the diameter of section of the inner cylinder face that forms by the second vertical portion of interior ring electrode 32 is the roundlet D outer diameter, and it is the circumference of great circle external diameter C that the end of the second horizontal component of interior ring electrode 32 forms diameter.The end of the second horizontal component of interior ring electrode 32 is mutually concordant with the outer circumference surface of ring resistance sheet 33.
First equals second distance F2 apart from F1.The first insulation distance of the formation between the outer circumference surface of the external cylindrical surface of resistor disc assembly 3 and ring resistance sheet 33 is more than or equal to the thickness E 1 of ring resistance sheet 33, and the second insulation distance that forms between the inner peripheral surface of the inner cylinder face of resistor disc assembly 3 and ring resistance sheet 33 is more than or equal to the thickness E 1 of ring resistance sheet 33.Breakdown voltage value is directly proportional to the size of insulation distance.Can guarantee like this when through-flow, electric current is to flow through between two cross sections of ring resistance sheet 33, namely the great circle internal diameter A from the outer ring electrode 31 of resistor disc assembly 3 flows into, and flow out from the roundlet D outer diameter of interior ring electrode 32, rather than inwardly ring or outer ring electrode dodges and iron from the edge of ring resistance sheet 33.
Be filled with insulation filling glue 34 between outer ring electrode 31, interior ring electrode 32, ring resistance sheet 33, and this insulation filling glue 34 forms two end faces of resistor disc assembly 3.The top of the first horizontal component of outer ring electrode 31 is coated with the insulation filling glue 34 that thickness equates apart from F1 with first, and the below of the second horizontal component of interior ring electrode 32 is coated with the insulation filling glue 34 that thickness equates with second distance F2.The puncture voltage of insulation filling glue 34 is much larger than air, does like this insulation between self side insulation that can greatly strengthen annular resistor disc 33 and outer ring electrode 31, interior ring electrode 32, ring resistance sheet 33 threes.Insulation filling glue 34 can adopt the materials such as epoxy resin, polyurethane, after solidifying, it forms a circular solid, its up and down end flat, during injecting glue, because of the reason of F1 and F2, on the partial coverage between great circle internal diameter A and roundlet D outer diameter, thickness is the insulating cement of F1 and F2.Make thus the first insulation distance be extended for by great circle internal diameter A to the distance the roundlet D outer diameter; Make the second insulation distance also to be extended for by great circle internal diameter A to the distance the roundlet D outer diameter, greatly strengthened the insulation of 31, inner and outer rings electrode.
This spool-type lightning protection insulator can be installed on the cross-arm 6 of shaft tower of low-voltage distributing line or on anchoring 7, shown in accompanying drawing 4 and accompanying drawing 5.Cross-arm 6 or anchoring 7 are connected with fastening bolt 2, and cross-arm 6 or anchoring 7 are contained on shaft tower, and namely it has the lightning protection natural grounding, the overvoltage energy that is passed over by discharging gap g-resistor disc assembly 3 can be released into ground.
Because of the diameter in the upper and lower side cross section of resistor disc identical, lightning current is the same by the area of upper/lower terminal plane electrode, therefore in the interior unit are of ring resistance sheet 33, current density is much the same, is conducive to improve through-flow effective area and the through-current capability of resistor disc.Therefore in the conventional design of traditional lightning arrester, be all that electrode is arranged on the axial both ends of the surface of lightning arrester, i.e. a termination high pressure, a termination earth potential.And as the lightning protection insulator of spool insulator design, be the reason that adapts to direct replacement existing line insulator and arrange because of the structure of the fastening bolt 2 of wire 5, discharging gap g and ground connection, two through-flow electrodes need be located at the sagittal plane of resistor disc body, rather than the axial both ends of the surface of traditional resistor disc, namely external serial gap g needs connecting resistance sheet outer circle diameter (high potential is at outer circle diameter); The bolt of earthing potential need be inserted in the centre of resistor disc.To this, certain available ring resistance sheet 33.Its outer circle diameter is made high-potential electrode, makes guest performer's discharging gap with porcelain piece 1 intermediate gap; Interior diameter is made low-potential electrode, connects grounding screw rod.But because the large and interior diameter of outer circle diameter of resistor disc is little, the area of two electrodes is different large.When through-flow, the current density that (outer circle diameter) area is large is little, and (interior diameter) current density that area is little is large.And in unit are, current density is larger, and resistor disc is more fragile.It is the area that the through-current capability of resistor disc only is decided by the prepared electrode of interior diameter; The external diameter of resistor disc is greatly also inoperative again.Lightning current very high frequency in addition has collection skin and stress effect, and the interior diameter electrode place of resistor disc very easily damages.Interior diameter is because of the stopping of resistor disc body in addition, and electrode (aluminium-plated) also is difficult for preparation.and in this programme, by outer ring electrode 31, interior ring electrode 32 is with the end flat electrode of ring resistance sheet 33 extended external diameter and the internal diameter of resistor disc assembly 3, namely for ring resistance sheet 33, electric current is still from the electrode stream mistake in the cross section at the two ends, axial up and down of ring resistance sheet 33, and ring resistance sheet 33 is because of upper, lower two sections diameter is identical, the area of a circle is identical, in resistor disc, the current density of unit are is also just roughly the same, lightning overvoltage can be by guest performer's discharging gap g-resistor disc assembly 3 external diameters-ring resistance sheet 33 the lower surface-resistor disc assembly 3 internal diameters-fastening bolt 2-cross arm of tower 6 of upper surface-ring resistance sheet 33 release with entering and block power frequency continued flow.Therefore can not damage greatly because of local current densities; Can be along the end face of ring resistance sheet 33 inside and outside edge flashover, also not can from the end face edge of resistor disc inwardly, the outer ring electrode dodges and irons discharge, satisfied the functional design requirements of making the spool-type lightning protection insulator.
Under lightning overvoltage, because of the distance of the discharging gap g outer surface creepage distance of insulation less than whole porcelain piece 1, therefore during thunderbolt, lightning current can be from wire 5 along porcelain piece 1 outer surface connect electronegative potential to fastening bolt 2() dodge and iron, but at first wire 5 punctures to the discharging gap g between outer ring electrode 31, lightning current from the circumferential gap of the involutory annular of two porcelain pieces, thereby enter ground through resistor disc assembly 32 to fastening bolt 2.Because the lightning current duration has extremely shortly, be μ s level, thermal effect low (this moment, the internal resistance of resistor disc was very little) can not form electrical arc erosions to wire 5, discharging gap g, outer ring electrode 31; And after lightning current; because nonlinear ring resistance sheet 33 recovers high resistant; ended (g place) along air ionization passage that the lightning current electrical discharge arc forms and under power frequency continued flow; therefore circuit can not form short circuit tripping operation and electrical arc erosion; effective protection circuit, can accomplish circuit not burning, thunderbolt do not break, insulate do not puncture, power frequency do not trip.
Make the surrounding of ring resistance sheet 33 all be wrapped in insulation filling glue 34 by injecting suitable insulation filling glue 34 in above-mentioned volume space to being formed by outer ring electrode 31, interior ring electrode 32 and ring resistance sheet 33, and there is no the gap.Due to solid puncture insulation level far above air, therefore improved the insulation level between the radial and axial biend of resistor disc medial and lateral face.The through-current capability test of independent ring resistance sheet 33, resistor disc can internal breakdown.But can dodge along self surface, inside and outside footpath when more and iron discharge.This is will be weaker than the former because of latter's insulation.Ring resistance sheet 33 surroundings all are wrapped in insulation filling glue 34, lightning current by the time be difficult for along resistor disc outer surface flashover breakdown, can be along directly inwardly ring electrode 32 or outer ring electrode 31 discharges of edge of arbitrary end face, guarantee lightning current by the time be electrode stream mistake along the resistor disc end flat, can not dodge along self outer surface and iron, improve the resistor disc through-current capability.
As when being struck by lightning, the lightning current energy exceeds the through-current capability of ring resistance sheet 33, and ring resistance sheet 33 damages, and discharging gap g can tolerate separately system's power-frequency voltage of 2 times, avoids circuit to send and does not power on; Otherwise as between discharge gap g because of certain reason just in case by short circuit, the rated voltage of ring resistance sheet 33 is greater than system's power-frequency voltage, can be in the situation that gap shorting, long-term work.The normal power transmission of system is guaranteed in the effect that is designed with dual fail-safe of lightning protection insulator thus.
Above-described embodiment only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow person skilled in the art scholar can understand content of the present invention and implement according to this, can not limit protection scope of the present invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.
Claims (8)
1. the low-voltage distributing line spool-type lightning protection insulator that guest performer's discharging gap is arranged, be installed on low-voltage distributing line, and it is characterized in that: it comprises two porcelain pieces, fastening bolt, resistor disc assembly;
The be involutory circumferential gap of the width that arranges and form height with Y-direction and directions X of two described porcelain pieces, wire is arranged at the outside of described circumferential gap; Described resistor disc assembly by inclusion within two described porcelain pieces and be positioned at the inboard of described circumferential gap; The end face direction of described resistor disc assembly parallels with the Width of described circumferential gap and near described porcelain piece, the lateral surface of described resistor disc assembly is near described circumferential gap; Described circumferential gap between described wire and described resistor disc assembly forms a discharging gap, and described wire and described resistor disc assembly form two electrodes of described discharging gap;
Described fastening bolt is perpendicular to the Width setting of described circumferential gap, and described fastening bolt runs through the place, axis that is arranged at two described porcelain pieces and described resistor disc assembly and two described porcelain pieces and described resistor disc assembly is fastened, and is provided with adhesive between described porcelain piece, described resistor disc assembly, described fastening bolt.
2. the low-voltage distributing line of the guest performer's of having discharging gap according to claim 1 spool-type lightning protection insulator, it is characterized in that: described resistor disc assembly is the axle center and has the cylindric of the first through hole, the inner cylinder face that it has two described end faces of opposing parallel and forms the external cylindrical surface of its outer peripheral face and form described the first through hole;
Described resistor disc assembly comprises outer ring electrode, interior ring electrode, ring resistance sheet; Described ring resistance sheet is the axle center and has the cylindric of the second through hole and axis that axis described ring resistance chip module is described resistor disc assembly; Described ring resistance sheet have opposing parallel two annulars the cross section and form the outer circumference surface on its periphery face of cylinder and form the inner peripheral surface on the face of cylinder of described the second through hole; One end of described outer ring electrode electrically contacts with a described cross section of described ring resistance sheet and is connected, and the other end of described outer ring electrode forms the external cylindrical surface of described resistor disc assembly; One end of described interior ring electrode electrically contacts with another described cross section of described ring resistance sheet and is connected, and the other end of described interior ring electrode forms the inner cylinder face of described resistor disc assembly; Be filled with insulation filling glue between described outer ring electrode, described interior ring electrode, described ring resistance sheet.
3. the low-voltage distributing line of the guest performer's of having discharging gap according to claim 2 spool-type lightning protection insulator, it is characterized in that: described outer ring electrode comprises the first vertically part and the first horizontal component of perpendicular setting, described the first horizontal component near described first vertically the upper end of part arrange and have the first distance apart from described upper end; Described interior ring electrode comprises the second vertical part and the second horizontal component of perpendicular setting, described the second horizontal component arranges and has second distance apart from described bottom near the bottom of the described second vertical part, and described the first horizontal component is connected and covers described cross section fully with two described cross sections of described ring resistance sheet respectively with described the second horizontal component.
4. the low-voltage distributing line of the guest performer's of having discharging gap according to claim 3 spool-type lightning protection insulator is characterized in that: described the first distance equals described second distance;
The insulation filling glue of filling between described outer ring electrode, described interior ring electrode, described ring resistance sheet forms two end faces of described resistor disc assembly, and the top of described the first horizontal component is coated with thickness and the described first equidistant described insulation filling glue, and the below of described the second horizontal component is coated with the described insulation filling glue that thickness equates with described second distance.
5. the low-voltage distributing line of the according to claim 3 or 4 described guest performer's of having discharging gaps spool-type lightning protection insulator, it is characterized in that: dividing by the first vertical portion of described outer ring electrode the diameter of section that forms described external cylindrical surface is the great circle internal diameter, and it is the circular hole of roundlet internal diameter that the end of the first horizontal component of described outer ring electrode forms diameter; Dividing the diameter of section of the described inner cylinder face that forms by the second vertical portion of described interior ring electrode is the roundlet external diameter, and it is the circumference of great circle external diameter that the end of the second horizontal component of described interior ring electrode forms diameter; The end of the first horizontal component of described outer ring electrode is mutually concordant with the inner peripheral surface of described ring resistance sheet, and the end of the second horizontal component of described interior ring electrode is mutually concordant with the outer circumference surface of described ring resistance sheet.
6. the low-voltage distributing line of the according to claim 3 or 4 described guest performer's of having discharging gaps spool-type lightning protection insulator, it is characterized in that: the first insulation distance of the formation between the outer circumference surface of the internal side diameter of the external cylindrical surface of described resistor disc assembly and described ring resistance sheet is more than or equal to the thickness of described ring resistance sheet, and the second insulation distance that forms between the inner peripheral surface of the inner cylinder face of described resistor disc assembly and described ring resistance sheet is more than or equal to the thickness of described ring resistance sheet.
7. the low-voltage distributing line of the guest performer's of having discharging gap according to claim 1 spool-type lightning protection insulator is characterized in that: described fastening bolt comprises the screw rod that runs through described porcelain piece and described resistor disc assembly, the two ends that are threaded onto respectively described screw rod and two nuts that described porcelain piece and described resistor disc assembly are clamped.
8. the low-voltage distributing line of the guest performer's of having discharging gap according to claim 1 spool-type lightning protection insulator is characterized in that: it is installed on the cross-arm of low-voltage distributing line or on anchoring; Described cross-arm or described anchoring are connected with described fastening bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310074125.4A CN103151124B (en) | 2013-03-08 | 2013-03-08 | Spool-type lightning insulator for low-voltage distribution line with external series spark gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310074125.4A CN103151124B (en) | 2013-03-08 | 2013-03-08 | Spool-type lightning insulator for low-voltage distribution line with external series spark gap |
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| CN103151124A true CN103151124A (en) | 2013-06-12 |
| CN103151124B CN103151124B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310074125.4A Expired - Fee Related CN103151124B (en) | 2013-03-08 | 2013-03-08 | Spool-type lightning insulator for low-voltage distribution line with external series spark gap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956239A (en) * | 2014-05-13 | 2014-07-30 | 国家电网公司 | Lightning protection insulator protector |
| CN113270238A (en) * | 2021-06-08 | 2021-08-17 | 广东电网有限责任公司 | Low-voltage insulator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010225502A (en) * | 2009-03-25 | 2010-10-07 | Viscas Corp | Polymer lightening arrestor |
| CN202196623U (en) * | 2010-12-17 | 2012-04-18 | 杨国安 | Puncture type lightning protection composite insulator |
-
2013
- 2013-03-08 CN CN201310074125.4A patent/CN103151124B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010225502A (en) * | 2009-03-25 | 2010-10-07 | Viscas Corp | Polymer lightening arrestor |
| CN202196623U (en) * | 2010-12-17 | 2012-04-18 | 杨国安 | Puncture type lightning protection composite insulator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956239A (en) * | 2014-05-13 | 2014-07-30 | 国家电网公司 | Lightning protection insulator protector |
| CN113270238A (en) * | 2021-06-08 | 2021-08-17 | 广东电网有限责任公司 | Low-voltage insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103151124B (en) | 2015-06-17 |
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