CN106356763A - Method for entering equal potential of compact type electric transmission line and used folding ladder - Google Patents
Method for entering equal potential of compact type electric transmission line and used folding ladder Download PDFInfo
- Publication number
- CN106356763A CN106356763A CN201610919548.5A CN201610919548A CN106356763A CN 106356763 A CN106356763 A CN 106356763A CN 201610919548 A CN201610919548 A CN 201610919548A CN 106356763 A CN106356763 A CN 106356763A
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- CN
- China
- Prior art keywords
- ladder
- transmission line
- section
- enter
- phase
- Prior art date
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/34—Ladders attached to structures, such as windows, cornices, poles, or the like
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/48—Ladder heads; Supports for heads of ladders for resting against objects
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
Abstract
The invention relates to a method for entering an equal potential of a compact type electric transmission line and a used folding ladder. The folding ladder arranged on a tower body of a rod tower between a phase-A lead wire and a phase-B lead wire enters the equal potential; the folding ladder comprises a ladder body, and a ground potential side ladder head and an equal potential side ladder head which are arranged at two ends of the ladder body respectively. the ground potential side ladder head is used for suspending the top of a ladder body on the tower body; the equal potential side ladder head is used for hanging the tail end of the ladder body on a lead wire needing to enter the equal potential; the ladder body comprises two sections which can be connected together in a rotatable manner; one section located on the upper side is located at a vertical position; one section on the lower side can be rotated to a horizontal position vertical to one section located on the upper side to enter a phase-A equal potential or a phase-B equal potential; and one section on the lower side can also be rotated to the vertical position, which forms an angle of 180 degrees with one section located on the upper side, to enter a phase-C equal potential. With the adoption of the method provided by the invention, workers can enter the equal potential of the compact type electric transmission line to do defect eliminating work; and the method is safe and efficient and the used folding ladder is simple in structure and convenient to use.
Description
Technical field
The invention belongs to power system livewire work field is and in particular to a kind of entrance compact transmission line is equipotential
Method and folding ladder used.
Background technology
Compact transmission line has raising transmission line of electricity conveying capacity, compression width of corridor, reduces circuit to environment
The features such as electromagnetic pollution, there is obvious economic benefit and social benefit, be at home and abroad widely applied.With conventional line
Compare, compact shaft tower makes line corridor width be obviously reduced, this also leads to compact shaft tower more compact, thus giving powered work
Industry brings extreme difficulties.
The powered operating type of tradition mainly includes two kinds:
(1) the firmly terraced method of insulation: the ladder firmly that insulate is horizontally placed between equipotential live line work point and tower body operating personnel, recycles
Insulation ladder firmly enters isoelectric level.In this kind of operating type, for different settings, it is hard that operating personnel need to move repeatedly insulation
Body meeting swing in operating personnel's moving process in ladder, and operation process, and compact line safe distance is extremely compact,
There is larger security risk.
(2) insulate hanging basket method: operating personnel's up steel tower crossbeam center suspension one hanging basket, takes advantage of hanging basket to reach and isoelectric level
Setting is ascended a height place, then puts to equipotential live line work point.In this kind of mode, because care provider can only rely on range estimation to judge operation people
Whether member reaches and equipotential live line work point equal-height position, and compact line safe distance is extremely compact, causes operation process to exist
Greatly security risk.
Content of the invention
For the defect of prior art, it is an object of the invention to provide one kind can enter safely compact transmission line etc.
The method of current potential and folding ladder used.
The technical scheme is that a kind of entrance equipotential method of compact transmission line, comprising:
Enter isoelectric level along the folding ladder being arranged on the shaft tower tower body between a phase and b phase conductor；
Described folding ladder includes terraced body and the ground potential side ladder head being separately positioned on terraced body two ends and isoelectric level side ladder head, ground
The terraced head in current potential side is used for for terraced body top being suspended on tower body, and isoelectric level side ladder head is used for for terraced body end being suspended to needs entrance etc.
On the wire of current potential；
Described ladder body include being rotatably connected together two sections, above one section is in vertical position, below one
Section can rotate, also can for below one section to one section of perpendicular horizontal level above to enter a phase or b equal potentials
Rotate to the vertical position being in 180 ° with a section above to enter c equal potentials.
In a specific embodiment, folding ladder is arranged on a phase and the middle of b phase conductor.
In a specific embodiment, the end of a section below connects insulating cord, pulls insulating cord so that by isoelectric level
Side ladder head is suspended to and needs to enter on equipotential wire, and the insulating cord other end ties up to the path on tower body to keep terraced body to be formed.
In a specific embodiment, when entering a phase or b equal potentials, the insulating cord other end ties up to a phase or b phase on tower body
The surface of wire, when entering c equal potentials, the insulating cord other end ties up to and installs at folding ladder on tower body.
In a specific embodiment, terraced body includes first paragraph, second segment and the 3rd section, first paragraph and second from top to bottom
Section is detachable but can not mutually rotatably connect, and second segment and the 3rd section are rotatably connected together.
In a specific embodiment, ladder head in ground potential side includes attachment fastener, and attachment fastener is provided with fastener slots, so that
Hang on tower body angle steel, fastener slots side is provided with fixing bolt, by rotary fixing screw bolt, angle steel is stepped up.
In a specific embodiment, first paragraph and second segment mutually overlap fixation, and the vertical support of terraced body both sides
Bar is perpendicular in the overlap joint contact surface of vertical direction.
In a specific embodiment, isoelectric level side ladder head and terraced body are detachably connected, for entering a phase or the equal electricity of b
Employing the first isoelectric level side ladder head of position, for entering employing the second isoelectric level side ladder head of c equal potentials.
In a specific embodiment, the first isoelectric level side ladder head is vertical with following one section of terraced body, the second isoelectric level side
Terraced head is in 180 ° with following one section of terraced body, and the first isoelectric level side ladder head and the second isoelectric level side Ti Tou end are equipped with gib head.
The present invention also provides a kind of above-mentioned entrance compact transmission line folding ladder that equipotential method is adopted.
The present invention enters the equipotential method of compact transmission line, using a folding ladder, so that operating personnel is entered
Enter compact transmission line a, b and c equal potentials and carry out defect elimination work, the method is safe efficient, folding ladder structure letter used
Single, easy to use.
Brief description
Fig. 1 is that the folding ladder (entering a, b two equal potentials) of one specific embodiment of the present invention is in showing of a state
It is intended to；
Fig. 2 is that the folding ladder (enter c equal potentials) of one specific embodiment of the present invention is in the signal of another state
Figure；
Fig. 3 is enlarged drawing at a in Fig. 1；
Fig. 4 is enlarged drawing at b in Fig. 1；
Fig. 5 is enlarged drawing at c in Fig. 1；
Fig. 6 is enlarged drawing at d in Fig. 1；
Fig. 7 is enlarged drawing at e in Fig. 2；
Fig. 8 is single loop compact transmission line window schematic diagram；
Fig. 9 is that one specific embodiment of the present invention enters single loop compact transmission line a equal potentials path schematic diagram；
Figure 10 is that one specific embodiment of the present invention enters single loop compact transmission line b equal potentials path schematic diagram；
Figure 11 is that one specific embodiment of the present invention enters single loop compact transmission line c equal potentials path schematic diagram；
Wherein, attachment fastener 1, fastener slots 11, fixing bolt 12, connecting rod 2, bolt 3, terraced body first paragraph 4, first are raised
Portion 41, the second lobe 42, terraced body second segment 5, the 3rd lobe 51, the 4th lobe 52, the first contact surface s1, the second contact
Face s2, the 3rd section 6 of terraced body, rotary shaft 7, clasp 8, first isoelectric level side ladder the 9, first gib head 91, the second isoelectric level side ladder head
10th, the second gib head 101, insulator e.
Specific embodiment
Used by the inventive method, folding insulation ladder is designed, designed.Other instruments (as insulation coaster, insulation transmission rope) are all
For the existing instrument of this area, its using method is well known to the skilled person.
The folding insulation ladder of the present invention includes terraced body and the ground potential side ladder head being separately positioned on terraced body two ends and isoelectric level
Side ladder head.Ground potential side ladder head is used for for terraced body top being suspended on tower body.Isoelectric level side ladder head is used for being suspended to terraced body end
Need to enter on equipotential wire.
As Fig. 1～7, the folding insulation ladder of one embodiment of the invention be designed with following features.
1. the design of ground potential side ladder head
Ground potential side ladder head includes attachment fastener 1 and connecting rod 2.Fastener slots 11, fastener slots 11 1 are had on attachment fastener 1
Side is provided with fixing bolt 12.Fastener slots 11 down, after being anchored to tower body angle steel, rotatable fixing bolt 12, clamp angle steel, it is to avoid ground
Current potential side ladder head swings.Connecting rod 2 is connected by bolt 3 with insulating ladder ladder body first paragraph 4.
2. the design of insulating ladder body
Terraced body includes terraced body first paragraph 4, terraced body second segment 5 and the 3rd section 6 of terraced body from top to bottom.
Terraced body first paragraph 4 and terraced body second segment 5 overlap joint are fixed.In a preferred embodiment, first paragraph 4 left and right sides
Vertical support bar end be respectively provided with the first lobe 41, the second lobe 42, the vertical support bar of second segment 5 left and right sides
Top is respectively provided with the 3rd lobe 51, the 4th lobe 52.First lobe 41 and the 3rd lobe 51 overlap joint are formed vertically
The first contact surface s1 in direction, the second lobe 42 and the 4th lobe 52 overlap joint form the second contact surface s2 of vertical direction.
S1, s2 are mutually perpendicular to, and fix lap-joint using bolt it is ensured that terraced body first paragraph 4, terraced body second segment 5 will not after assembling
Rock.
Connect by rotary shaft 7 between terraced body second segment 5, the 3rd section 6 of terraced body, the 3rd section 6 of terraced body can ladder body second relatively
Section 5 rotates in the range of 180 °, can fold (the two angle is 0 °) completely, can be fully deployed (the two angle is 180 °).
The 3rd section of 6 end both sides of terraced body are equipped with clasp 8.Terraced body adopts for the 3rd section 6 bolt to be connected with isoelectric level side ladder head.
Insulating ladder body can make graded insulation ladder with foam-filled insulation tube, and every segment length is about 3m, and insulation tube material is
3240 epoxy resin.For ensure operating personnel safety, and effectively reduce insulating ladder weight, single insulation tube net sectional area
Should meet
Wherein m1、m2It is respectively operating personnel's body weight and ladder deadweight, σ is the allowable tensile stress of 3240 epoxy resin.
3. isoelectric level side ladder head design
Enter the biphase equipotential first isoelectric level side ladder 9 of a, b vertical with terraced the 3rd section 6 of body, the first isoelectric level side ladder
9 tops are provided with two the first gib heads 91, can easily hook on split conductor.
Enter the second isoelectric level side ladder 10 of c equal potentials and terraced body is generally aligned in the same plane interior, the second grade electricity for the 3rd section 6
Position side Ti Tou10 end is provided with two the second gib heads 101 directed downwardly.
The present invention is also designed (length of bolt and cross-sectional area) to used bolt:
For bolt 3, and the bolt that the 3rd section of 6 head terraced with isoelectric level side of terraced body is connected, shank of bolt contacts table with hole wall
Extrusion stress is born in face；Connecting at composition surface, shear stress is born in shank of bolt cross section:
1) shank of bolt and the crushing strength condition of hole wall are:
2) shank of bolt shear strength condition is:
Simultaneous two formula the minimum length of bolt and sectional area.Wherein: the d diameter of bolt；lminShank of bolt is squeezed with hole wall
The minimum length of pressure；[σp] extrusion stress allowable；[τ] allowable shear stress, m1And m2For operating personnel's body weight and ladder deadweight.
For the bolt of terraced body first paragraph 4 and terraced body second segment 5 lap-joint, and the bolt used by rotary shaft 7:
1) shank of bolt and the crushing strength condition of hole wall are:
2) shank of bolt shear strength condition is:
Each meaning of parameters is as above.
As Fig. 8, position a, b, c are respectively the three-phase conducting wire of single loop compact transmission line.
The equipotential method of entrance compact transmission line of one specific embodiment of the present invention, with reference to Fig. 9～11, with list
As a example loop compact transmission line, it specifically comprises the following steps that
1. lift insulating ladder
In operation, 1, No. 2 electricians carry insulation coaster and tower stepped on by insulation transmission rope, and will insulates coaster and insulation is transmitted
Rope is arranged on position 1.Using insulation coaster and insulation transmission rope, the folding ladder of the present invention is lifted to setting.Wherein should be in button
Ring 8 end connects the longer insulating cord of more terraced body, and the pulling force of every section of insulating cord should be greater than
2. a equal potentials are entered
As Fig. 9, ground potential side ladder head is first fixed on position 1 (the upper square iron of the middle of a phase and b phase conductor by No. 1 electrician
On tower) on the tower body angle steel at place, No. 2 electricians then pull insulating cord that the first isoelectric level side ladder 9 is suspended to a side isoelectric level wire
On, the insulating cord other end ties up to position 2 (on the steel tower directly over a phase conductor) place, and now terraced the 3rd section 6 sections of body is maintained at level
Position, that is, as path 1 in Fig. 4.Isoelectric level electrician then can be utilized folding ladder to enter a equal potentials, whole process Road along path 1
Footpath is relatively fixed.
3. b equal potentials are entered
With entrance a equal potentials mode used tool all same, now ground potential side ladder head is rotated 180 °, insulating cord is another
One end ties up to position 3 (on the steel tower directly over b phase conductor) place, and other steps are consistent, and isoelectric level electrician can utilize folding ladder edge
Path 2 enters b equal potentials, and in whole process, path is relatively fixed.
4. c equal potentials are entered
Now ladder head in isoelectric level side should change the second isoelectric level side ladder 10 into, and by terraced body the 3rd section 6 put to vertical direction,
Second gib head 101 hangs on c phase conductor, and the insulating cord other end is tied up at position 1, that is, as path 3, isoelectric level electrician in Fig. 4
Folding ladder is then can be utilized to enter c equal potentials along path 3.
Said method is also applied for entering Compact Type Double Circuit Transmission Line isoelectric level.
Claims (10)
1. a kind of enter the equipotential method of compact transmission line it is characterised in that:
Enter isoelectric level along the folding ladder being arranged on the shaft tower tower body between a phase and b phase conductor；
Described folding ladder includes terraced body and the ground potential side ladder head being separately positioned on terraced body two ends and isoelectric level side ladder head, ground potential
Side ladder head is used for for terraced body top being suspended on tower body, and isoelectric level side ladder head is used for being suspended to terraced body end to be needed to enter isoelectric level
Wire on；
Described ladder body include being rotatably connected together two sections, above one section is in vertical position, following one section of energy
Enough rotations are to enter a phase or b equal potentials, below one section also can rotate with one section of perpendicular horizontal level above
To the vertical position being in 180 ° with a section above to enter c equal potentials.
2. according to claim 1 entrance the equipotential method of compact transmission line it is characterised in that: folding ladder setting
Middle in a phase and b phase conductor.
3. according to claim 1 entrance the equipotential method of compact transmission line it is characterised in that: a section below
End connect insulating cord, pull insulating cord to be suspended to and need to enter on equipotential wire isoelectric level side ladder head, insulation
The rope other end ties up to the path on tower body to keep terraced body to be formed.
4. the entrance equipotential method of compact transmission line according to claim 3 it is characterised in that: enter a phase or b
During equal potentials, the insulating cord other end ties up to the surface of a phase or b phase conductor on tower body, and when entering c equal potentials, insulating cord is another
One end ties up to installs at folding ladder on tower body.
5. according to claim 1 entrance the equipotential method of compact transmission line it is characterised in that: terraced body is arrived from above
Lower inclusion first paragraph, second segment and the 3rd section, first paragraph and second segment are detachable but can not mutually rotatably connect, second segment and
3rd section is rotatably connected together.
6. according to claim 1 or 5 enter the equipotential method of compact transmission line it is characterised in that: ground potential
Side ladder head includes attachment fastener, and attachment fastener is provided with fastener slots, to hang on tower body angle steel, fastener slots side is provided with fixation
Angle steel is stepped up by bolt by rotary fixing screw bolt.
7. the entrance equipotential method of compact transmission line according to claim 5 it is characterised in that: first paragraph and the
Two-stage nitration mutually overlaps fixation, and the vertical support bar of terraced body both sides is perpendicular in the overlap joint contact surface of vertical direction.
8. according to claim 1 or 5 enter the equipotential method of compact transmission line it is characterised in that: isoelectric level
Side ladder head and terraced body are detachably connected, for entering employing the first isoelectric level side ladder head of a phase or b equal potentials, for entering c
Employing the second isoelectric level side ladder head of equal potentials.
9. according to claim 8 entrance the equipotential method of compact transmission line it is characterised in that: the first isoelectric level
Side ladder head is vertical with following one section of terraced body, and the second isoelectric level side ladder head and following one section of terraced body are in 180 °, the first isoelectric level
Side ladder head and the second isoelectric level side Ti Tou end are equipped with gib head.
10. a kind of one of claim 1～9 is described enters the folding ladder that the equipotential method of compact transmission line is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919548.5A CN106356763A (en) | 2016-10-21 | 2016-10-21 | Method for entering equal potential of compact type electric transmission line and used folding ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919548.5A CN106356763A (en) | 2016-10-21 | 2016-10-21 | Method for entering equal potential of compact type electric transmission line and used folding ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106356763A true CN106356763A (en) | 2017-01-25 |
Family
ID=57863571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610919548.5A Pending CN106356763A (en) | 2016-10-21 | 2016-10-21 | Method for entering equal potential of compact type electric transmission line and used folding ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106356763A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847613A (en) * | 2018-06-29 | 2018-11-20 | 国家电网公司 | A kind of aerial suspension device overhauling transmission pressure |
| CN110707595A (en) * | 2019-09-18 | 2020-01-17 | 国网浙江省电力有限公司金华供电公司 | Safety method for lightning arrester line to enter equipotential in live state |
| CN111064153A (en) * | 2020-02-25 | 2020-04-24 | 国网山东省电力公司单县供电公司 | Auxiliary support for installing power conductor fittings |
| CN112864939A (en) * | 2021-01-07 | 2021-05-28 | 国网安徽省电力有限公司淮北供电公司 | Tool for replacing damper of power transmission line |
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|---|---|---|---|---|
| DD149593A1 (en) * | 1980-03-20 | 1981-07-15 | Ernst Schmidtchen | WORKING TROLLEY FOR ELECTRICAL ENGINE TRANSFER |
| KR200438937Y1 (en) * | 2007-03-06 | 2008-03-12 | 주식회사 한발 | Working ladder for polymer insulator of power electric transmission line |
| CN201323409Y (en) * | 2008-11-07 | 2009-10-07 | 江苏省电力公司徐州供电公司 | Tool for live line replacing of high voltage transmission line V-shaped insulator chain |
| CN202550405U (en) * | 2012-04-21 | 2012-11-21 | 石家庄供电公司 | Special ladder for maintenance of strain insulator |
| CN203488086U (en) * | 2013-08-26 | 2014-03-19 | 国家电网公司 | Insulating ladder for high-hung and low-used type fixed safety belt |
| CN203674618U (en) * | 2013-11-29 | 2014-06-25 | 国家电网公司 | Dedicated ladder facilitating operation of 220 KV/ 66 KV in-and-out wire |
| CN204984238U (en) * | 2015-06-25 | 2016-01-20 | 国网山东博兴县供电公司 | Electrical power emergency repair ladder |
| CN105443024A (en) * | 2014-09-29 | 2016-03-30 | 江苏力盛船舶设备制造有限公司 | Extension ladder |
| CN205212339U (en) * | 2015-12-25 | 2016-05-04 | 国网浙江省电力公司台州供电公司 | A fixed padlock of iron tower cross arm side for vase ladder of being qualified for next round of competitions |
-
2016
- 2016-10-21 CN CN201610919548.5A patent/CN106356763A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD149593A1 (en) * | 1980-03-20 | 1981-07-15 | Ernst Schmidtchen | WORKING TROLLEY FOR ELECTRICAL ENGINE TRANSFER |
| KR200438937Y1 (en) * | 2007-03-06 | 2008-03-12 | 주식회사 한발 | Working ladder for polymer insulator of power electric transmission line |
| CN201323409Y (en) * | 2008-11-07 | 2009-10-07 | 江苏省电力公司徐州供电公司 | Tool for live line replacing of high voltage transmission line V-shaped insulator chain |
| CN202550405U (en) * | 2012-04-21 | 2012-11-21 | 石家庄供电公司 | Special ladder for maintenance of strain insulator |
| CN203488086U (en) * | 2013-08-26 | 2014-03-19 | 国家电网公司 | Insulating ladder for high-hung and low-used type fixed safety belt |
| CN203674618U (en) * | 2013-11-29 | 2014-06-25 | 国家电网公司 | Dedicated ladder facilitating operation of 220 KV/ 66 KV in-and-out wire |
| CN105443024A (en) * | 2014-09-29 | 2016-03-30 | 江苏力盛船舶设备制造有限公司 | Extension ladder |
| CN204984238U (en) * | 2015-06-25 | 2016-01-20 | 国网山东博兴县供电公司 | Electrical power emergency repair ladder |
| CN205212339U (en) * | 2015-12-25 | 2016-05-04 | 国网浙江省电力公司台州供电公司 | A fixed padlock of iron tower cross arm side for vase ladder of being qualified for next round of competitions |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847613A (en) * | 2018-06-29 | 2018-11-20 | 国家电网公司 | A kind of aerial suspension device overhauling transmission pressure |
| CN110707595A (en) * | 2019-09-18 | 2020-01-17 | 国网浙江省电力有限公司金华供电公司 | Safety method for lightning arrester line to enter equipotential in live state |
| CN110707595B (en) * | 2019-09-18 | 2020-10-27 | 国网浙江省电力有限公司金华供电公司 | Safety method for lightning arrester line to enter equipotential in live state |
| CN111064153A (en) * | 2020-02-25 | 2020-04-24 | 国网山东省电力公司单县供电公司 | Auxiliary support for installing power conductor fittings |
| CN112864939A (en) * | 2021-01-07 | 2021-05-28 | 国网安徽省电力有限公司淮北供电公司 | Tool for replacing damper of power transmission line |
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| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |