CN203859510U - 35kV overhead line lightning stroke clamping protector - Google Patents
35kV overhead line lightning stroke clamping protector Download PDFInfo
- Publication number
- CN203859510U CN203859510U CN201420211480.1U CN201420211480U CN203859510U CN 203859510 U CN203859510 U CN 203859510U CN 201420211480 U CN201420211480 U CN 201420211480U CN 203859510 U CN203859510 U CN 203859510U
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- China
- Prior art keywords
- clamper
- protector
- spray point
- insulator
- protector body
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000001012 protector Effects 0.000 title claims abstract description 74
- 208000025274 Lightning injury Diseases 0.000 title abstract description 8
- 239000012212 insulator Substances 0.000 claims abstract description 41
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000007921 spray Substances 0.000 claims description 42
- 238000005452 bending Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 22
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 6
- 230000003139 buffering effect Effects 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 7
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000002679 ablation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 206010063900 Steal syndrome Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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- Insulators (AREA)
Abstract
The utility model provides a 35kV overhead line lightning stroke clamping protector, which comprises a clamping protector body, an insulator, a discharging needle, a discharging grading ring and a discharging counter. The 35kV overhead line lightning stroke clamping protector is used for protecting a 35kV overhead line against lightning stroke, the insulator is arranged between an electrified lead and the clamping protector body to form highly insulation, so that the service life of the clamping protector body is long, the power-frequency current leakage does not exist, the line-to-earth fault cannot occur even under the condition that the clamping protector body is damaged, the 35kV overhead line lightning stroke clamping protector can still protect the 35kV overhead line without taking any grounding measure, is convenient in installation and maintenance, can effectively prevent lightning trip and disconnection accidents, can reduce the lightning trip-out rate of the line, and improves the reliability of power supply; in addition, the condition of the protected line is monitored in detail through the discharging counter, so that the times that the line is stroke by lightning and the abnormal conditions can be known in advance, and the lightning activities of the line can be analyzed, thereby preventing the occurrence of accidents.
Description
Technical field
The utility model relates to the protective device that prevents thunderbolt, and it is specifically related to a kind of 35kV overhead transmission line thunderbolt clamper protector.
Background technology
Along with the development of electrical network, also more and more higher to the requirement of the safety and reliability of 35kV electric pressure circuit.Compare more 110kV and the above transmission line of voltage levels, 35kV overhead distribution, because lightning withstand level is relatively low, is therefore faced with more severe lightning protection situation.
The lightning protection measures of 35kV overhead distribution mainly contains overhead ground wire, arcing horn and zinc oxide arrester etc. is installed at present, but according to the feedback of field practice, with upper type, exists various problems, is difficult to form effective measures.Mainly there is at present following deficiency:
1, the valve block of the inside of lightning arrester is difficult to reach consistent at steep wave, lightning wave, operation ripple protective margin technical parameter; during causing long-term hanging net operation, exist power frequency leakage current to flow into the earth, easily cause that the inner valve block accelerated ageing of the long-term hanging net operation of thermal runaway blast and lightning arrester causes line-to-ground fault.
2, lightning arrester, overhead ground wire, arcing horn are installed needs extra ground connection, installs inconvenient, difficult in maintenance.When circuit large area is installed lightning arrester, if there is arrester ground fault, conventionally need to spend a large amount of manpower and materials and time looking up the fault.In addition, soil resistivity is higher, and earth electrode falls that degree of thwarting is large and earth electrode steal phenomenon is serious, all will cause lightning arrester, the lightning conducter installed to lose efficacy.
Utility model content
The purpose of this utility model is to solve the problem that prior art exists, a kind of 35kV overhead transmission line thunderbolt clamper protector is provided, between live wire and clamper protector body, there is the insulation of insulator height of formation, make the long service life of clamper protector body, without power current, leak, even can not cause line-to-earth fault in the situation that clamper protector body damages yet, still can play a protective role, do not need to take any grounding measures, easy for installation, easy to maintenance, can effectively prevent lightning stroke trip, broken string accident, can reduce the tripping rate with lightning strike of circuit simultaneously, improve the reliability of power supply, in addition, by the situation of the detailed supervision of discharge counter and institute's protection circuit, number of times and abnormal conditions that precognition circuit is struck by lightning, analysis circuit lightening activity situation, trouble-saving generation.
In order to reach above-mentioned technical purpose, the utility model by the following technical solutions:
A kind of 35kV overhead transmission line thunderbolt clamper protector; comprise clamper protector body, insulator, spray point, electric discharge grading ring and discharge counter; it is characterized in that; the bottom of described clamper protector body is connected with the top of described spray point, insulator; the bottom of described insulator is connected with the top of described electric discharge grading ring; the tip of described spray point forms discharging gap with the annular edge of electric discharge grading ring; the sidepiece of described clamper protector body is provided with discharge counter installing hole, and described discharge counter is connected with described clamper protector body by wire.
As such scheme preferably, the inside of described clamper protector body is provided with buffer resistance sheet R1 and R2, discharge coil L1 and L2 and pulsed capacitance C1, C2, C3 and C4, described buffer resistance sheet R1, pulsed capacitance C1, capacitor C 2, capacitor C 3, capacitor C 4, buffer resistance sheet R2 connect successively, described discharge coil L1 is in parallel with buffer resistance sheet R1, pulsed capacitance C1 and pulsed capacitance C2, and described discharge coil L2 is in parallel with pulsed capacitance C3, pulsed capacitance C4 and buffering resistor disc R2; Described buffer resistance sheet R2 is connected with described spray point.
As such scheme preferably, the spacing of described discharging gap is 150-200mm.
As such scheme preferably, the angle of the central axis of the most advanced and sophisticated extended line of described spray point and described clamper protector body is 38-47 degree.
As such scheme preferably, the diameter of described electric discharge grading ring is 180-270mm.
As such scheme preferably, the length of described insulator is 350-550mm.
As such scheme preferably, the U-shaped connector that also comprises the top of being located at described insulator, the first bolt and the first nut, the relative two sides of described U-shaped connector are respectively equipped with the first screwed hole and the second screwed hole, the bottom of described clamper protector body is provided with the 3rd screwed hole, described spray point comprises spray point body and square fixed block, one end of described spray point body and described square fixed block welding, other end bending forms the tip of described spray point, described square fixed block is provided with the 4th screwed hole, the first screwed hole described in described the first screw bolt passes, the 3rd screwed hole, the second screwed hole and the 4th screwed hole also coordinate the bottom of described clamper protector body and described spray point are fixed with described the first nut.
As such scheme preferably, described electric discharge grading ring comprises annular body, the first bending member and the second bending member, the two ends of described the first bending member and the welding of described annular body, the middle part of described the first bending member is provided with the first segmental arc, relatively described the first segmental arc in the middle part of described the second bending member is provided with the second segmental arc, described the first segmental arc and the second segmental arc complement each other to form installing hole, the bottom of described insulator is located in described installing hole, and described the first bending member and the second bending member are fixed by the second bolt and the second nut.
Owing to having said structure, the utility model has the following advantages compared to existing technology:
1, comprise clamper protector body, insulator, spray point, electric discharge grading ring and discharge counter, between live wire and clamper protector body, there is the insulation of insulator height of formation, make the long service life of clamper protector body, without power current, leak, even can not cause line-to-earth fault in the situation that clamper protector body damages yet, still can play a protective role, do not need to take any grounding measures, easy for installation, easy to maintenance, can effectively prevent lightning stroke trip, broken string accident, can reduce the tripping rate with lightning strike of circuit simultaneously, improve the reliability of power supply, in addition, by the situation of the detailed supervision of discharge counter and institute's protection circuit, number of times and abnormal conditions that precognition circuit is struck by lightning, analysis circuit lightening activity situation, trouble-saving generation.
2, the inside of described clamper protector body is provided with buffer resistance sheet R1 and R2, discharge coil L1 and L2 and pulsed capacitance C1, C2, C3 and C4; lightning current drags down thunder and lightning wave head to pulsed capacitance C1, C2, C3 and C4 momentary charge through buffer resistance sheet R2; after slicing, again through discharge coil L1 and L2 electric discharge, protection 35kV overhead transmission line exempts from thunderbolt.
3, the spacing of described discharging gap is 150-200mm; guarantee that this physical efficiency of clamper protector bears up the voltage under the normal operation of system; can guarantee again response speed when circuit suffers Lightning Over-voltage, can carry out suitable adjustment according to the insulation level of environment for use and 35kV circuit self simultaneously.
4, the angle of the central axis of the most advanced and sophisticated extended line of described spray point and described clamper protector body is 38-47 degree; can avoid raining, freeze or extraneous dunghill freely falls on electric discharge grading ring and causes other accident along spray point tip, the reliability while having increased operation.
5, the diameter of described electric discharge grading ring is 180-270mm, the induction field of guaranteeing insulator and wire connecting ends is evenly distributed, the insulator umbrella ablation situation having caused while simultaneously having avoided spray point, with electric discharge grading ring, electric discharge occurs, improve discharge time and useful life, further increased reliability.
6, the length of described insulator is 350-550mm, guarantees that insulator self should tolerate system voltage and mate with circuit porcelain vase, can prevent that again the damage of clamper protector body from causing ground fault, plays effective isolation voltage effect.
7, the U-shaped connector, the first bolt and the first nut that also comprise the top of being located at described insulator, make being connected between the bottom of clamper protector body and the top of spray point, insulator, the flexibility while having guaranteed whole continuity and on-the-spot installation.
8, described electric discharge grading ring comprises annular body, the first bending member and the second bending member, and guaranteeing has the effect that is well connected and fixed between electric discharge grading ring and insulator, has further improved clamper protector reliability.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the embodiment of the 35kV overhead transmission line thunderbolt clamper protector that Fig. 1 provides for the utility model;
The circuit theory diagrams of the internal structure of the clamper protector that Fig. 2 provides for the utility model;
The structural representation of the clamper protector body that Fig. 3 provides for the utility model;
The structural representation of the spray point that Fig. 4 provides for the utility model;
The axonometric drawing of the U-shaped connector that Fig. 5 provides for the utility model;
The structural representation of the insulator that Fig. 6 provides for the utility model;
The vertical view of the structural representation of the electric discharge grading ring that Fig. 7 provides for the utility model.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the technical solution of the utility model is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Fig. 1-7, a kind of 35kV overhead transmission line thunderbolt clamper protector, comprises clamper protector 1, spray point 2, electric discharge grading ring 3, insulator 4 and discharge counter 5.
The intermediate layer of described clamper protector body 1 adopts glass fibre silk ribbon multi-lay winding, heating cure to form, the outer insulation full skirt for adopting hydrophobicity sulfuration silica gel to be sealed to form.The top 11 of described clamper protector body 1 is arranged on circuit cross-arm by bolt, inside is provided with buffer resistance sheet R1 and R2, discharge coil L1 and L2, pulsed capacitance C1, C2, C3 and C4, described buffer resistance sheet R1, pulsed capacitance C1, capacitor C 2, capacitor C 3, capacitor C 4, buffer resistance sheet R2 connect successively, and one end 7 of series circuit is connected with circuit cross-arm, the other end 8 is connected with the top 41 of described spray point 2 and insulator 4; Described discharge coil L1 is in parallel with buffer resistance sheet R1, pulsed capacitance C1 and pulsed capacitance C2, and described discharge coil L2 is in parallel with pulsed capacitance C3, pulsed capacitance C4 and buffering resistor disc R2.The sidepiece of described clamper protector body 1 is provided with discharge counter installing hole 13, and described discharge counter 5 is connected with described clamper protector body 1 by wire 6.
Described electric discharge grading ring 3 comprises annular body 31, the first bending member 32 and the second bending member 33, the two ends of described the first bending member 32 and 31 welding of described annular body, the middle part of described the first bending member 32 is provided with the first segmental arc, relatively described the first segmental arc in the middle part of described the second bending member 33 is provided with the second segmental arc, described the first segmental arc and the second segmental arc complement each other to form installing hole, the bottom 42 of described insulator 4 is located in described installing hole, and described the first bending member 32 and the second bending member 33 are fixed by the second bolt and the second nut.
The top 41 of described insulator 4 is provided with U-shaped connector 43, the first bolt and the first nut, the relative two sides of described U-shaped connector 42 are respectively equipped with the first screwed hole 44 and the second screwed hole 45, the bottom of described clamper protector body 1 is provided with the 3rd screwed hole 14, described spray point 2 comprises spray point body 21 and square fixed block 22, one end of described spray point body 21 and 22 welding of described square fixed block, other end bending forms the tip of described spray point 2, described square fixed block 22 is provided with the 4th screwed hole 23, the first screwed hole 44 described in described the first screw bolt passes, the 3rd screwed hole 14, the second screwed hole 45 and the 4th screwed hole 23 also coordinate the bottom of described clamper protector body 1 12 fixing with described spray point 2 with described the first nut.The bottom 42 of described insulator 4 is provided with and transmission pressure screw 46.
The tip of described spray point 2 forms discharging gap L1 with the annular body 31 of electric discharge grading ring 3, and the spacing of described discharging gap L1 is 150-200mm.The angle r of the central axis of the most advanced and sophisticated extended line of described spray point 2 and described clamper protector body 1 is 38-47 degree.The diameter D of described electric discharge grading ring 3 is 180-270mm.The length L 2 of described insulator 4 is 350-550mm.
A kind of 35kV overhead transmission line thunderbolt clamper protector that the utility model provides, comprise clamper protector body, insulator, spray point, electric discharge grading ring and discharge counter, between live wire and clamper protector body, there is the insulation of insulator height of formation, make the long service life of clamper protector body, without power current, leak, even can not cause line-to-earth fault in the situation that clamper protector body damages yet, still can play a protective role, do not need to take any grounding measures, easy for installation, easy to maintenance, can effectively prevent lightning stroke trip, broken string accident, can reduce the tripping rate with lightning strike of circuit simultaneously, improve the reliability of power supply, in addition, by the situation of the detailed supervision of discharge counter and institute's protection circuit, number of times and abnormal conditions that precognition circuit is struck by lightning, analysis circuit lightening activity situation, trouble-saving generation, the inside of described clamper protector body is provided with buffer resistance sheet R1 and R2, discharge coil L1 and L2 and pulsed capacitance C1, C2, C3 and C4, lightning current drags down thunder and lightning wave head to pulsed capacitance C1, C2, C3 and C4 momentary charge through buffer resistance sheet R2, after slicing, again through discharge coil L1 and L2 electric discharge, protection 35kV overhead transmission line exempts from thunderbolt, the spacing of described discharging gap is 150-200mm, guarantee that this physical efficiency of clamper protector bears up the voltage under the normal operation of system, can guarantee again response speed when circuit suffers Lightning Over-voltage, can carry out suitable adjustment according to the insulation level of environment for use and 35kV circuit self simultaneously, the angle of the central axis of the most advanced and sophisticated extended line of described spray point and described clamper protector body is 38-47 degree, can avoid raining, freeze or extraneous dunghill freely falls on electric discharge grading ring and causes other accident along spray point tip, the reliability while having increased operation, the diameter of described electric discharge grading ring is 180-270mm, the induction field of guaranteeing insulator and wire connecting ends is evenly distributed, the insulator umbrella ablation situation having caused while simultaneously having avoided spray point, with electric discharge grading ring, electric discharge occurs, improve discharge time and useful life, further increased reliability, the length of described insulator is 350-550mm, guarantees that insulator self should tolerate system voltage and mate with circuit porcelain vase, can prevent that again the damage of clamper protector body from causing ground fault, plays effective isolation voltage effect, the U-shaped connector, the first bolt and the first nut that also comprise the top of being located at described insulator, make being connected between the bottom of clamper protector body and the top of spray point, insulator, the flexibility while having guaranteed whole continuity and on-the-spot installation, described electric discharge grading ring comprises annular body, the first bending member and the second bending member, and guaranteeing has the effect that is well connected and fixed between electric discharge grading ring and insulator, has further improved clamper protector reliability.
Installation and the operation principle of a kind of 35kV overhead transmission line thunderbolt clamper protector that the utility model provides are: the bottom 42 of insulator 4 is connected with high-voltage conducting wires, the top 11 of clamper protector body 1 is arranged on cross-arm by bolt.When 35kV overhead transmission line suffers Lightning Over-voltage, Overvoltage Amplitude reaches the operation voltage threshold value of discharging gap, between electric discharge grading ring 3 and spray point 2, form discharge channel, discharging gap action, lightning current process buffer resistance sheet R2 is to pulsed capacitance C1, C2, C3 and C4 momentary charge, now electric capacity capacitive reactance is by high step-down, and thunder and lightning wave head amplitude is dragged down by pulsed capacitance C1, C2, C3 and C4 moment, also claims " slicing "; Now; the internal charge of pulsed capacitance C1, C2, C3 and C4 is through discharge coil L1 and L2 electric discharge; thereby discharge; after circuit Lightning Over-voltage disappears; outer air discharging gap and wire isolation; electric discharge grading ring 3 returns to original state with spray point 2, while waiting on circuit outlet Lightning Over-voltage, works again, and protection 35kV overhead transmission line exempts from thunderbolt.In addition, by the situation of the detailed supervision of discharge counter 5 and institute's protection circuit, number of times and abnormal conditions that precognition circuit is struck by lightning, analysis circuit lightening activity situation, trouble-saving generation.
The above; it is only embodiment of the present utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of described claim.
Claims (8)
1. 35kV overhead transmission line thunderbolt clamper protector, comprise clamper protector body, insulator, spray point, electric discharge grading ring and discharge counter, it is characterized in that, the bottom of described clamper protector body and described spray point, the top of insulator is connected, the bottom of described insulator is connected with the top of described electric discharge grading ring, the tip of described spray point forms discharging gap with the annular edge of electric discharge grading ring, the sidepiece of described clamper protector body is provided with discharge counter installing hole, described discharge counter is connected with described clamper protector body by wire.
2. 35kV overhead transmission line according to claim 1 thunderbolt clamper protector, it is characterized in that, the inside of described clamper protector body is provided with buffer resistance sheet R1 and R2, discharge coil L1 and L2 and pulsed capacitance C1, C2, C3 and C4, described buffer resistance sheet R1, pulsed capacitance C1, capacitor C 2, capacitor C 3, capacitor C 4, buffer resistance sheet R2 connect successively, described discharge coil L1 is in parallel with buffer resistance sheet R1, pulsed capacitance C1 and pulsed capacitance C2, and described discharge coil L2 is in parallel with pulsed capacitance C3, pulsed capacitance C4 and buffering resistor disc R2; Described buffer resistance sheet R2 is connected with described spray point.
3. 35kV overhead transmission line thunderbolt clamper protector according to claim 1, is characterized in that, the spacing of described discharging gap is 150-200mm.
4. according to the 35kV overhead transmission line thunderbolt clamper protector described in claim 1 or 3, it is characterized in that, the angle of the central axis of the most advanced and sophisticated extended line of described spray point and described clamper protector body is 38-47 degree.
5. according to the 35kV overhead transmission line thunderbolt clamper protector described in claim 1 or 3, it is characterized in that, the diameter of described electric discharge grading ring is 180-270mm.
6. 35kV overhead transmission line thunderbolt clamper protector according to claim 1, is characterized in that, the length of described insulator is 350-550mm.
7. 35kV overhead transmission line according to claim 1 thunderbolt clamper protector, it is characterized in that, the U-shaped connector that also comprises the top of being located at described insulator, the first bolt and the first nut, the relative two sides of described U-shaped connector are respectively equipped with the first screwed hole and the second screwed hole, the bottom of described clamper protector body is provided with the 3rd screwed hole, described spray point comprises spray point body and square fixed block, one end of described spray point body and described square fixed block welding, other end bending forms the tip of described spray point, described square fixed block is provided with the 4th screwed hole, the first screwed hole described in described the first screw bolt passes, the 3rd screwed hole, the second screwed hole and the 4th screwed hole also coordinate the bottom of described clamper protector body and described spray point are fixed with described the first nut.
8. 35kV overhead transmission line according to claim 1 thunderbolt clamper protector, it is characterized in that, described electric discharge grading ring comprises annular body, the first bending member and the second bending member, the two ends of described the first bending member and the welding of described annular body, the middle part of described the first bending member is provided with the first segmental arc, relatively described the first segmental arc in the middle part of described the second bending member is provided with the second segmental arc, described the first segmental arc and the second segmental arc complement each other to form installing hole, the bottom of described insulator is located in described installing hole, described the first bending member and the second bending member are fixed by the second bolt and the second nut.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201420211480.1U CN203859510U (en) | 2014-04-28 | 2014-04-28 | 35kV overhead line lightning stroke clamping protector |
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CN201420211480.1U CN203859510U (en) | 2014-04-28 | 2014-04-28 | 35kV overhead line lightning stroke clamping protector |
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CN203859510U true CN203859510U (en) | 2014-10-01 |
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CN201420211480.1U Expired - Fee Related CN203859510U (en) | 2014-04-28 | 2014-04-28 | 35kV overhead line lightning stroke clamping protector |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105957658A (en) * | 2016-07-25 | 2016-09-21 | 国网湖南省电力公司 | Ice-preventing insulator for ground wire ice-melting reconstruction |
-
2014
- 2014-04-28 CN CN201420211480.1U patent/CN203859510U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105957658A (en) * | 2016-07-25 | 2016-09-21 | 国网湖南省电力公司 | Ice-preventing insulator for ground wire ice-melting reconstruction |
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C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20141001 |