CN103595005A - Insulator type lightning arrester - Google Patents
Insulator type lightning arrester Download PDFInfo
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- CN103595005A CN103595005A CN201310653962.2A CN201310653962A CN103595005A CN 103595005 A CN103595005 A CN 103595005A CN 201310653962 A CN201310653962 A CN 201310653962A CN 103595005 A CN103595005 A CN 103595005A
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Abstract
The invention relates to the technical field of power transmission equipment, and discloses an insulator type lightning arrester. The insulator type lightning arrester comprises an iron tower side fitting, a core rod, a wire side fitting and a hollow lightning arrester body with a gap. The iron tower side fitting and the wire side fitting are connected to the two ends of the core rod in a pressed mode respectively, and the core rod is sleeved with the hollow lightning arrester body with the gap. According to the insulator type lightning arrester, the functions of insulators and lightning arresters are achieved at the same time through the structure height equivalent to common insulator bunches, and the good equipment size and the good performance index are achieved.
Description
Technical field
The present invention relates to power transmitting device technical field, particularly a kind of insulator style lightning arrester.
Background technology
Transmission line especially ultra-high-tension power transmission line should be noted that a lot of problems in built on stilts process of laying, and wherein modal is exactly the problems such as circuit support, line insulation and overvoltage protection.For addressing these problems, available technology adopting insulator solves support wire and prevents that electric current from returning the problem on ground, adopts lightning arrester with protection transmission line and electric equipment, to exempt from the damage of atmospheric over-voltage (being generally thunderbolt) and switching overvoltage.
Because the application target of two kinds of devices is different, its performance index of paying close attention to have larger difference.Wherein, insulator is mainly that above stretching circuit is to provide support at bracing frame (as line bar or steel tower etc.), and its one end hangs on shaft tower, and the other end is hung wire; Insulator needs can bear larger mechanical load and tensile strength, anti-crawl agentdefiection and fatigue resistance are had to higher requirement, obviously also needs there is good insulating properties simultaneously.Lightning arrester as its name suggests, is mainly the infringement of over-voltage to power transmission and transforming equipment, and it mainly uses metal oxide resistance, under normal working voltage, is high-impedance state, when suffering overvoltage, in conducting state, discharges overvoltage energy; The practical structures of lightning arrester there are certain requirements overcoat insulation height, discharging gap distance etc., and equipment self build is large, its structural-mechanical property is not good, bearing capacity is limited, and the creepage distance of lightning arrester obviously can not meet the insulating properties requirement of circuit.
Based on above-mentioned difference, in prior art, above-mentioned two kinds of devices are two kinds of independently apparatus assemblies, insulator is generally used on shaft tower as the built on stilts necessary assembly of laying of transmission line, and lightning arrester is arranged on shaft tower as affiliated facility, and both are in parallel use conventionally.But, adopt the mode of prior art, due to lightning arrester weight and volume larger, not only make the load of circuit and steel tower increase, line facility is complicated, and because steel tower cross-arm position is limited, the installation of lightning arrester is inconvenience extremely, steel tower cross-arm place equipment is more also can make troubles to work such as live line working.In addition, because two kinds of autonomous devices are in parallel, use, obviously make devices in system sum be multiplied, cause system failure rate obviously to increase, make transmission line use in operation maintenance workload large.
Although prior art also has a small amount of research to wish to realize the integrated of insulator and lightning arrester, but its actual effect or just sacrifice the withstand voltage properties that has slightly improved insulator in the situation of build and stability, just sacrifice the bearing capacity that has slightly improved lightning arrester in the situation in useful life, under harsh a little environment, just can only use as insulator or lightning arrester, cannot possess the two function completely simultaneously.The most typically, the common fault of existing research has: two ends gold utensil is generally to adopt mucilage binding or the mode that is spirally connected with being connected of plug, problem due to aspects such as connected mode, materials, can not bear powerful tensile load, sealing is also subject to serious test, and the function that can not really accomplish existing insulator has again the function of lightning arrester; The structure height of this external equipment is far longer than common line insulator.
Summary of the invention
For the above-mentioned defect of prior art, technical problem to be solved by this invention be as how less equipment simultaneously for transmission line provides support, the ability of insulation and overvoltage protection.
For addressing the above problem, the invention provides a kind of insulator style lightning arrester, comprising: the arrester with gaps of steel tower side gold utensil, plug, side of wire was gold utensil and hollow; Wherein,
Described steel tower side gold utensil and described side of wire was gold utensil are crimped on respectively on the two ends of described plug;
The arrester with gaps of described hollow is sleeved on outside described plug.
Preferably, the arrester with gaps of described hollow comprises: valve block, the first insulating cylinder, target, the second insulating cylinder and high-field electrode; Wherein,
Described valve block and described the second insulating cylinder are sleeved on outside described plug and coated whole described plug position, and described valve block is near steel tower side, and described the second insulating cylinder is near side of wire was;
Described the first insulating cylinder at least covers the outer surface of described valve block;
Described target and described high-field electrode are corresponding to be arranged, and described target is arranged on the joint of described valve block and described the second insulating cylinder and outwards stretches, and described high-field electrode is arranged on the side of wire was end of described the second insulating cylinder and outwards stretches.
Preferably, each assembly of the arrester with gaps of described hollow and described plug global formation, or be sequentially arranged on outside described plug after each assembly independence moulding of the arrester with gaps of described hollow.
Preferably, described insulator style lightning arrester also comprises: core bar jacket; Wherein, described core bar jacket is arranged between described plug and the arrester with gaps of hollow, and described core bar jacket covers the outer surface of described plug.
Preferably, described insulator style lightning arrester also comprises: insulating cylinder covers thing outward, and it is coated on the outside of the first insulating cylinder and the second insulating cylinder.
Preferably, described insulator style lightning arrester also comprises: be filled between described core bar jacket and described valve block, the embedding handled thing of the gap between described valve block and described the first insulating cylinder, between described plug and described the second insulating cylinder, described embedding handled thing adopts insulating material.
Preferably, described insulator style lightning arrester also comprises: end part seal and release structure for pressure and end sealing mechanism; Wherein, described end part seal and release structure for pressure are arranged on the steel tower side end of described plug, and described end sealing mechanism is arranged on the side of wire was end of described plug.
Preferably, described valve block adopts the form of loop configuration or the parallel connection of employing multicolumn.
Preferably, described the first insulating cylinder only covers the outer surface of described valve block, and described the first insulating cylinder only covers the outer surface of described valve block, described the first insulating cylinder and described the second insulating cylinder be split or global formation; The thickness of described the second insulating cylinder and described valve block are suitable with described the first insulating cylinder thickness sum, or much smaller than its thickness sum.
Preferably, the top of described target and/or described high-field electrode is annular, open annular, semi-circular, spherical or clavate, and the cross sectional shape of described electrode is circular, oval or flat ring-type.
Preferably, described valve block is metal oxide valve block or backing metal.
Preferably, when global formation, the part of described global formation is passed through flange connection with described steel tower side gold utensil or described side of wire was gold utensil.
Compared with prior art, the insulator style lightning arrester that technical scheme of the present invention provides has been realized the function of insulator and lightning arrester simultaneously with the structure height suitable with common insulator string, there are preferably equipment size and performance index, obviously optimized system mounting means, reduced equipment sum, effectively reduced system failure rate.
Accompanying drawing explanation
Fig. 1 is the structural representation of insulator style lightning arrester in a preferred embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is for implementing preferred embodiments of the present invention, and described description is to illustrate that rule of the present invention is object, not in order to limit scope of the present invention.Protection scope of the present invention should with claim the person of being defined be as the criterion, the embodiment based in the present invention, the every other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
At present, in ultra-high-tension power transmission line, line insulator is generally porcelain insulating substring, glass insulator strings or synthetic insulator.Wherein porcelain insulating substring and glass insulator strings are all to be connected and formed by the insulator of multi-disc porcelain or glass material, and synthetic insulator is the insulator that adopts organic polymer polymerization insulating material to manufacture.Synthetic insulator is comprised of plug (interior insulation), umbrella sheath (external insulation), end metal fitting and annex (grading ring).The glass fibre that plug is arranged in parallel along axis in a large number by resin-dipping and forming, tensile strength, higher than 1100Mpa, is 3～5 times of high strength china, has good anti-crawl agentdefiection and fatigue resistance, bears the mechanical load of synthetic insulator.Umbrella sheath is formed and is attached to mandrel outer by macromolecule organic composite material, in protection, insulate and enough creepage distances are provided.End metal fitting is made and hot galvanizing by malleable cast iron or the above material of forged steel, links together with plug, bears and transmit whole mechanical loads.Grading ring is made by aluminum alloy materials, and uniform electric field distributes, and prevents that high voltage electric field acceleration synthetic insulator end is aging.Synthetic insulator on transmission line is mainly that plug bears tensile load.
Above-mentioned insulator in normal working conditions, can play the effect of support wire and insulation, but conventionally transmission line be struck by lightning or during switching overvoltage insulator all can there is flashover, when overvoltage surpasses the design load that insulator can bear, insulator will, by electric arc burn, even make porcelain insulator glass insulator be wounded and smash.Be that existing insulator does not have lightning protection effect, it can affect supply of electric power when losing insulation property and causing transmission line tripping operation because of electric discharge damage, and have a power failure and will bring very big inconvenience to people's productive life, cause larger economic loss, change the insulator damaging and also can expend larger manpower, material resources and financial resources.
Leakage conductor can be divided into surge arresters with porcelain housings and polymeric housed metal oxide arrester by lagging material at present, by version, can be divided into arrester without gaps and arrester with gaps.The valve block of arrester without gaps bears working voltage for a long time, and chargeability is high, and valve block exists easy problem of aging.Arrester with gaps can be divided into pure air gap again, by composite insulator, supports Huan – czermak space.Arrester with gaps body part is not born voltage substantially, needn't worry the aging of it.At present, when leakage conductor dangles and installs, specified tensile load is generally 15 times of its deadweight, and this tensile load is far smaller than the specified tensile load of insulator; And widely used arrester with gaps structure height (general 1780～1954mm) is far longer than the structure height (general 1022～1314mm) of insulator.Existing leakage conductor can not bear the powerful tensile load of wire for a long time, can not play the effect of support wire, and simultaneously its build and insulation property have also limited the integrated of itself and insulator, can only adopt mode in parallel to install together with insulator.
In order to make a device can there is the function of insulator and lightning arrester simultaneously, in embodiments of the invention, mainly lightning arrester is significantly improved, the parameters such as the pulling force that can meet certain requirements, intensity, meet the characteristic of insulator, as electrical characteristics such as electromechanical failure load, tensile strength, ageing resistance, fatigue crack-resistant, antifouling property, creepage distances, obtained having the lightning arrester (being called for short insulator style lightning arrester) of line insulator performance.In implementation process of the present invention, the technical problem that first development insulator style lightning arrester will solve has:
1, the mechanical performance of lightning arrester design, even if lightning arrester can play support wire, the function of bearing tension.This is the great difficult problem that will solve.At present, insulator and lightning arrester are two independently equipment, have different functions, in parallel use on transmission line.If make lightning arrester equipment have the function of insulator simultaneously, just the necessary mechanical performance that improves lightning arrester, makes it meet the function of insulator.
2, insulator style lightning arrester structure height is suitable with common line insulator, and structure height can not be too large, to can replace easily original insulator in actual applications.This is another great difficult problem that will solve.At present, the structure height of existing 110kV arrester with gaps is far longer than the structure height of 110kV insulator.Therefore to guarantee under the prerequisite of lightning arrester lightning protection function, structure height shortened to insulator suitable, and improve the function that its mechanical performance can play support wire.The composite sheath insulation height of lightning arrester, discharging gap distance, by theory and experimental study and practical application approval, if want, shorten the overall structure height of lightning arrester, need to study composite sheath insulation height, discharging gap apart from redesigning inner valve block composition, electrode structure and installation site mode etc., have great difficulty.
3, the insulation property of lightning arrester design, even if the insulation property such as creepage distance of lightning arrester can meet the requirement of line insulator.
4, lightning arrester does not lose in the situation of lightning protection characteristic, the characteristic of insulator while meeting general operation, and when thunder and lightning is attacked shaft tower, lightning arrester can discharge in advance, does not damage insulation and the mechanical performance of lightning arrester in electric discharge.
5, realize lightning protection function and can also realize insulator electric property and mechanical performance, meet the needs of installing simultaneously, meet volume adequacy, lightweight, be applicable to large area, convenience, simple and easy installation.
Wherein the first two problem is that emphasis needs to solve, and is also the common problem that does not obtain effective solution route of prior art, is the content that following preferred implementation realizes emphatically.
First, in an embodiment of the present invention, the overall structure height of insulator style lightning arrester and conventional line insulator is suitable, and at an equipment, has realized the function of insulator and lightning arrester simultaneously.This isolator lightning arrester bears main mechanical force by middle plug, and two ends gold utensil is directly crimped on plug, the same with the mid portion structure of existing insulator, bears mechanical load, and this structure technology is ripe, mechanically stressed reliable.Particularly, the insulator style lightning arrester in the present invention comprises: the arrester with gaps of steel tower side gold utensil, plug, side of wire was gold utensil and hollow; Wherein, described steel tower side gold utensil and described side of wire was gold utensil are crimped on respectively on the two ends of described plug; The arrester with gaps of described hollow is sleeved on outside described plug.
In addition, in this area, the body of common arrester with gaps and inter space device are split type, during use, by modes such as bulb ball-and-socket or flanges, are installed together.In the preferred embodiments of the present invention, the clearance electrode of insulator style lightning arrester and body are integral body.
In actual applications, the overall structure height of insulator style lightning arrester of the present invention is suitable with the common insulator string of 110kV, during application, can conveniently replace existing line insulator, make insulator style lightning arrester really accomplish that the function of insulator and lightning arrester is same in a device.Below further the preferred implementation in accompanying drawing is described as follows:
Referring to Fig. 1, in one embodiment of the invention, insulator style lightning arrester comprises: steel tower side gold utensil 1, plug 3, core bar jacket 4(can omit), point-like filling place in valve block 5(Fig. 1), trellis filling place in the first insulating cylinder 6, target 7, second insulating cylinder 8(Fig. 1), high-field electrode 10 and side of wire was gold utensil 11; Wherein, steel tower side gold utensil 1 and side of wire was gold utensil 11 are crimped on respectively on the two ends of plug 3, and core bar jacket 4 covers the outer surface of plug 3; Valve block 5 and the second insulating cylinder 8 are sleeved on outside core bar jacket 4 and coated whole plug position, valve block 5 (is gold utensil 1 side near steel tower side, that is ground connection side), the second insulating cylinder 8 is near side of wire was (gold utensil 11 sides, that is high-pressure side), the first insulating cylinder 6 at least covers the outer surface of valve block 5, target 7 and the corresponding setting of high-field electrode 10, target 7 is arranged on the joint of valve block 5 and the second insulating cylinder 8 and outwards stretches, and high-field electrode 10 is arranged on the side of wire was end of the second insulating cylinder 8 and outwards stretches.
Adopt aforesaid way, steel tower side gold utensil 1, plug 3, core bar jacket 4 and side of wire was gold utensil 11 have formed the core rod of insulator similar to traditional structure, mainly by plug 3, bear mechanical load; Wherein, core bar jacket 4 is not necessary condition, and it is aging in order to protect plug 3 to keep away from moisture in plug 3 outsides, covering core bar jacket 4.But in fact as long as suitably process afterwards in lightning arrester body and plug 3 junctions (such as vacuumizing, pour into, sealing etc.), plug 3 generally can not make moist, so also can omit need not for core bar jacket 4.Valve block 5, the first insulating cylinder 6, target 7, the second insulating cylinder 8 and high-field electrode 10 form the arrester with gaps body of hollows, are sleeved on outside above-mentioned core rod of insulator and discharging gap is external, overvoltage protection is provided and does not bear mechanical load.The above embodiment of the present invention has realized the function of insulator and lightning arrester simultaneously with the structure height suitable with the common insulator string of 110kV thus, and the function of two aspects is basic mutually without impact, there are preferably equipment size and performance index, obviously optimized system mounting means, reduced equipment sum, effectively reduced system failure rate.
In the preferred embodiment of Fig. 1, described insulator style lightning arrester also comprises: insulating cylinder covers thing 12 outward, and it is coated on the outside of the first insulating cylinder 6 and the second insulating cylinder 8.Insulating cylinder covers full skirt and/or the sheath that thing 12 is preferably insulation outward, is used for as whole device provides external insulation, and it can be one-body molded with lightning arrester main body.In addition, described insulator style lightning arrester also can further comprise: the embedding handled thing 13 that is filled in gap between core rod of insulator and lightning arrester (such as between core bar jacket and valve block, between valve block and the first insulating cylinder, between plug and the second insulating cylinder etc.), it adopts insulating material, as silicon rubber etc., for guaranteeing the interior insulation property of core rod of insulator.Correspondingly, described insulator style lightning arrester also can comprise: end part seal and release structure for pressure 2 and end sealing mechanism 9; Wherein, end part seal and release structure for pressure 2 are arranged on the steel tower side end of plug 3, and end sealing mechanism 9 is arranged on the side of wire was end of plug 3, in order to guarantee the effect of above-mentioned embedding; The earth pressure release that the end part seal of steel tower side end and release structure for pressure 2 can also further bear lightning arrester middle valve plate 5, to steel tower side gold utensil 1, extends its life-span to alleviate the pressure of lightning arrester.
In other preferred embodiments more of the present invention, plug 3 preferably adopts epoxy plug, more preferably selects and on insulator, has used the glass fibre leading-drawing rod through long-term test.In addition, steel tower side gold utensil 1 is preferably ball-and-socket, and side of wire was gold utensil 11 is preferably bulb; This is the same with the two ends gold utensil form of common composite insulator, makes device of the present invention identical with common composite insulator mounting means, can directly substitute insulator and install.Particularly, adopt the mounting means that dangles, ball-and-socket gold utensil 1 is connected with steel tower cross-arm hanging point by ball-eye, U-shaped ring etc., and bulb gold utensil 11 is connected with wire clamp.
Valve block 5 is preferably high gradient metal oxide valve block or backing metal; Valve block number of parameters or backing metal are arranged according to correlation computations and are determined.Valve block 5 can adopt loop configuration (being global formation sleeve pipe), also can adopt the form (being that a plurality of column-shape strips are assembled into sleeve pipe) of multicolumn parallel connection.More preferably, valve block 5 adopts voltage gradient to be greater than the valve block of 250V/mm.
Wherein, the first insulating cylinder and the second insulating cylinder be split or global formation; The thickness of the second insulating cylinder and valve block are suitable with the first insulating cylinder thickness sum, or much smaller than its thickness sum.Well-balanced for guaranteeing Whole Equipment shape, two insulating cylinders have two kinds of implementations: the barrel of the first insulating cylinder 6 is thinner, only the outer surface of coated valve block 5; The barrel of the second insulating cylinder 8 is thicker, is equivalent to the thickness sum of valve block 5 and the first insulating cylinder 6.Or the first insulating cylinder 6 is coated the outer surface of valve block 5 and the second insulating cylinder 8 simultaneously, now the barrel of the second insulating cylinder 8 is suitable with valve block 5 thickness, and now the second insulating cylinder 8 can be preferably cross-over block.
Lightning arrester body insulate near on high-tension side part (i.e. part between two electrodes), this part can with lightning arrester one, can be also split.If one, the target 7 of its inside in the middle of can supporting with independent insulating part, also can be directly in the enclosure portion produce fixed station.Preferably, the root of two electrodes can directly be wrapped up by insulating cylinder or adopt fixed station to install.The top of two electrodes (or at least one) is annular electrode, and its cross sectional shape is circular, oval or flat ring-type.If it is more nervous that equipment overall structure height implements, the remainder of target 7 except annular electrode can be coated with insulating barrier; Or target also can be drawn in inflection again, now must be covered with insulating barrier once.
Each assembly of lightning arrester body part can be global formation, is arranged on outside plug 3 after completing; Also can be to install one by one outside plug 3.Lightning arrester body part at least at one end with plug on the gold utensil of crimping fix.On the plug gold utensil of that end fixing with lightning arrester body, dispose the flange being connected with lightning arrester, this flange can with gold utensil one, can be also follow-up making; If follow-up making, preferably, this flange should be noted that sealing and equipotential, and through-flow during thunderbolt.
With respect to prior art, technical scheme of the present invention provides a kind of isolator lightning arrester, and it has following clear superiority:
1, insulator and lightning arrester are relatively independent reasonably fits together again, make insulator style arrester device really accomplish that the function of insulator and lightning arrester is same in a device, optimized system mounting means, reduced equipment sum, effectively reduced system failure rate.
The tensile load of 2, mainly bearing wire by middle plug 3, lightning arrester function is realized by other assemblies, and does not affect the stressed of plug, in substantially non-interference mode, has guaranteed the useful life of assembly separately.
The lightning arrester of the mode such as 3, hollow sleeve and discharging gap be external makes the overall structure height of device suitable with the common insulator string of 110kV, during application, can conveniently replace existing line insulator.
Although below invention has been described in conjunction with the preferred embodiments, but it should be appreciated by those skilled in the art, method and system of the present invention is not limited to the embodiment described in embodiment, in the situation that do not deviate from the spirit and scope of the invention being limited by appended claims, can the present invention be made various modifications, increase and be replaced.
Claims (12)
1. an insulator style lightning arrester, is characterized in that, comprising: the arrester with gaps of steel tower side gold utensil, plug, side of wire was gold utensil and hollow; Wherein,
Described steel tower side gold utensil and described side of wire was gold utensil are crimped on respectively on the two ends of described plug;
The arrester with gaps of described hollow is sleeved on outside described plug.
2. insulator style lightning arrester according to claim 1, is characterized in that, the arrester with gaps of described hollow comprises: valve block, the first insulating cylinder, target, the second insulating cylinder and high-field electrode; Wherein,
Described valve block and described the second insulating cylinder are sleeved on outside described plug and coated whole described plug position, and described valve block is near steel tower side, and described the second insulating cylinder is near side of wire was;
Described the first insulating cylinder at least covers the outer surface of described valve block;
Described target and described high-field electrode are corresponding to be arranged, and described target is arranged on the joint of described valve block and described the second insulating cylinder and outwards stretches, and described high-field electrode is arranged on the side of wire was end of described the second insulating cylinder and outwards stretches.
3. insulator style lightning arrester according to claim 1 and 2, it is characterized in that, each assembly of the arrester with gaps of described hollow and described plug global formation, or be sequentially arranged on outside described plug after each assembly independence moulding of the arrester with gaps of described hollow.
4. insulator style lightning arrester according to claim 1 and 2, is characterized in that, described insulator style lightning arrester also comprises: core bar jacket; Wherein,
Described core bar jacket is arranged between described plug and the arrester with gaps of hollow, and described core bar jacket covers the outer surface of described plug.
5. insulator style lightning arrester according to claim 2, is characterized in that, described insulator style lightning arrester also comprises: insulating cylinder covers thing outward, and it is coated on the outside of the first insulating cylinder and the second insulating cylinder.
6. insulator style lightning arrester according to claim 4, it is characterized in that, described insulator style lightning arrester also comprises: be filled between described core bar jacket and described valve block, the embedding handled thing of the gap between described valve block and described the first insulating cylinder, between described plug and described the second insulating cylinder, described embedding handled thing adopts insulating material.
7. insulator style lightning arrester according to claim 1, is characterized in that, described insulator style lightning arrester also comprises: end part seal and release structure for pressure and end sealing mechanism; Wherein, described end part seal and release structure for pressure are arranged on the steel tower side end of described plug, and described end sealing mechanism is arranged on the side of wire was end of described plug.
8. insulator style lightning arrester according to claim 2, is characterized in that, described valve block adopts loop configuration or adopts the form of multicolumn parallel connection.
9. insulator style lightning arrester according to claim 2, is characterized in that, described the first insulating cylinder only covers the outer surface of described valve block, described the first insulating cylinder and described the second insulating cylinder be split or global formation; The thickness of described the second insulating cylinder and described valve block are suitable with described the first insulating cylinder thickness sum, or much smaller than its thickness sum.
10. insulator style lightning arrester according to claim 2, it is characterized in that, the top of described target and/or described high-field electrode is annular, open annular, semi-circular, spherical or clavate, and the cross sectional shape of described electrode is circular, oval or flat ring-type.
11. insulator style lightning arresters according to claim 2, is characterized in that, described valve block is metal oxide valve block or backing metal.
12. insulator style lightning arresters according to claim 3, is characterized in that, when global formation, the part of described global formation is passed through flange connection with described steel tower side gold utensil or described side of wire was gold utensil.
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| CN108695029A (en) * | 2018-04-28 | 2018-10-23 | 江苏神马电力股份有限公司 | Insulator and the disconnecting switch for using the insulator |
| CN109914899A (en) * | 2019-03-15 | 2019-06-21 | 江苏神马电力股份有限公司 | Cross-arm and power transmission rod |
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| CN106205899A (en) * | 2016-07-15 | 2016-12-07 | 江苏远航电缆附件有限公司 | A kind of band gap compound needle type insulator |
| CN106205899B (en) * | 2016-07-15 | 2017-07-28 | 江苏远航电缆附件有限公司 | A kind of band gap compound needle type insulator |
| CN107301907A (en) * | 2017-07-19 | 2017-10-27 | 国网湖南省电力公司 | A kind of anti-icing anti-thunder insulator |
| CN107301907B (en) * | 2017-07-19 | 2023-01-20 | 国网湖南省电力公司 | Anti-icing lightning protection insulator |
| CN108695029A (en) * | 2018-04-28 | 2018-10-23 | 江苏神马电力股份有限公司 | Insulator and the disconnecting switch for using the insulator |
| CN109914899A (en) * | 2019-03-15 | 2019-06-21 | 江苏神马电力股份有限公司 | Cross-arm and power transmission rod |
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|---|---|
| CN103595005B (en) | 2017-02-08 |
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