CN102290738B - Construction method for replacing 35kV line tension pole cross arm - Google Patents
Construction method for replacing 35kV line tension pole cross arm Download PDFInfo
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- CN102290738B CN102290738B CN 201110123696 CN201110123696A CN102290738B CN 102290738 B CN102290738 B CN 102290738B CN 201110123696 CN201110123696 CN 201110123696 CN 201110123696 A CN201110123696 A CN 201110123696A CN 102290738 B CN102290738 B CN 102290738B
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- 238000010276 construction Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 32
- 239000010959 steel Substances 0.000 claims description 32
- 230000004224 protection Effects 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 5
- 241000219991 Lythraceae Species 0.000 claims description 3
- 235000014360 Punica granatum Nutrition 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000035939 shock Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention discloses a construction method for replacing a 35kV line rod cross arm. In construction, the method comprises the following steps of: adopting a tool to transfer four side phase lead wire hanging points of an old cross arm to a pole body safely and gradually so that the cross arm on the tension pole is emptied out completely, and then replacing the old cross arm with a new cross arm; and then reversing the operations in the above steps, transferring the four side phase lead wire hanging points from the pole body to the new cross arm, thus finishing the replacement construction of the cross arm. In the invention, the replacement of the 35kV line conventional type tension pole cross arm can be finished without placing the replaced lead wire on the ground, thus, the construction time is shortened, the work intensity of the operating personnel is reduced, and normal power supply to the spanned line is not affected.
Description
Technical field
The present invention relates to the maintenance construction method of electric power transmission line, particularly change the construction method of cross-arm on the conventional tension-resistant rod of 35kV circuit in the belt tension situation.
Background technology
When the inventor (An County power transmission and distribution maintenance crew of power supply administration) changes for the serious tension pole cross arm of 35kV circuit pack corrosion in work many years ago, the method that adopts is that all span lines that will be replaced 35kV circuit below have a power failure, to be replaced again 35kV line conductor let-down to ground, carry out at last the replacing of the serious tension pole cross arm of 35kV circuit corrosion.If adopt old-fashioned method to construct, not only increased workload, and do not guaranteed user's electricity consumption reliability.
Summary of the invention
The construction method that the purpose of this invention is to provide a kind of 35kV of replacing line tension pole cross arm being subjected to changing tension pole cross arm in the tension force situation at wire, and does not cause the impact of power supply on the crossed line of transmission line below.
The object of the present invention is achieved like this: a kind of construction method of the 35kV of replacing line tension pole cross arm: it is characterized in that, carry out according to the following steps:
A), when entering the working site, confirm that at first whether complete circuit and inspection bracing wire, distaff and pole-footing have or not abnormal conditions, check individual Work tool and produce Work tool;
B), step on bar, electrical verification, installing earth connection after the work permit order that obtains dispatching;
C), untie the drainage thread of three-phase conducting wire, then two φ 12 steel wire ropes are installed as temporary guy in 1 meter above old cross-arm, these two temporary guys should be on the distaff of two wires at the fixing point on ground, should confirm to use in the situation of distaff non-corroding of wire, bury ground pomegranate wood underground otherwise can only excavate the hole, hole on wire is equidirectional; Two temporary guys utilize turnbuckle to make temporary guy fastening stressed; Lever Blocks on the tension-resistant rod shaft and the steel wire cover that is enclosed within on wire hang between temporary guy and old cross-arm, so that shaft is well stressed under the condition of both sides wire tension balance;
D), utilize 14 * 1.5 meters steel wires of two φ to overlap the whole old cross-arm that encases, put at these two steel wires respectively and respectively hang a 3T Lever Blocks, carry out stringing and loose ends when identical to two limits of the same phase of old cross-arm, come the tension force of the old cross-arm of balance with this, spin and be out of shape in order to avoid make the cross-arm discontinuity; Use again 12 * 2 meters steel wire covers of 2 φ wire is entangled and wire is played two pipe protection effects; Install respectively two chucks on every phase conductor, a chuck is used for hanging the Lever Blocks at old cross-arm place, hold concurrently simultaneously and hang the steel wire cover that is enclosed within step c) on wire, another chuck is used for hanging the steel wire cover of old cross-arm place wire, the peg Lever Blocks with it of holding concurrently simultaneously so just can guarantee that wire can not lose two pipe protection effects of wire during the transfer of hanging point place at any time on from old cross-arm hanging point to shaft;
E), between two temporary guys (4a, 4b) and old cross-arm, hang respectively the Lever Blocks of four 2T with the steel wire cover of 14 * 1.5 meters of four φ, 12 * 3 meters steel wire covers of four φ are installed again, to play two pipe protection effects to wire on the shaft between temporary guy and old cross-arm;
F), before taking off the insulator string hanging point, must carry out shock test to the Lever Blocks of its use, confirm the errorless rear hanging point bolt that just can take off insulator string, next just utilize to restrict back and forth insulator string is put to ground, reduce the weight of wire Lever Blocks when shifting one's position with this;
G), when carrying out stringing and loose ends, the work director must arrange the special messenger to guard the safe distance of the scissors crossing of temporary guy, shaft and circuit below at any time, completes smoothly to guarantee stringing and off-line working safety;
H), ease out the Lever Blocks that hangs on old cross-arm, hang over simultaneously that on shaft, Lever Blocks eases out speed and synchronously carries out fastening with the Lever Blocks on old cross-arm; When wire is transferred on shaft, the Lever Blocks on shaft slightly in the situation of belt tension, guarantees the safe distance to circuit below leap place simultaneously; At this moment the both sides of old cross-arm one side of tension-resistant rod are mutually with regard to successful moving on shaft;
I), on the opposite side of old cross-arm repeats step c～h, just four limits on old cross-arm are all moved on shaft mutually, at this moment the wire on old cross-arm all soars, the work of the mutually old cross-arm of thereupon more changing sides;
J), old cross-arm is removed, utilize coaster and restrict back and forth after new cross-arm installation, c～h is reversed by above-mentioned steps, just the wire on shaft is all moved to new cross-arm hanging point place;
K), recover the three-phase drainage thread of circuit, removes two temporary guys, utilize back and forth rope to put down all Work tools on electric pole, after the dismounting earth connection, on bar, staff's lower beam successively, complete whole operation process.
Above-mentioned tension-resistant rod is the 35kV line tension pole.
Compared with prior art, the invention has the beneficial effects as follows: construction method of the present invention is to be subjected to change in the tension force situation cross-arm of 35kV circuit conventional type (JS1--JS4, ZS2, ZS4 bar type) tension-resistant rod at wire, the method is safety, simple and feasible both, guaranteed the safety and reliability of operation, shorten again line maintenance operating time and staff's labour intensity, and reduced the 10kV of the 35kV circuit below leap of working and frequency of power cut and the interruption duration of 0.4kV power circuit, guaranteed the crossed line power supply reliability.The inventor has carried out changing the real work of conventional type tension pole cross arm on wire is the 35kV circuit of LGJ-120mm2, and due saving engineering time and the effect that reduces labor intensity have been received, simultaneously, do not affect the normal power supply of crossed line.
Description of drawings
Fig. 1 is the schematic diagram that belt tension of the present invention is changed tension pole cross arm.
Embodiment
Belt tension is changed tension pole cross arm:
Construction principle: be exactly being transferred on shaft of four limit phase conductor hanging point successes on old cross-arm soared its old cross-arm fully, and be replaced by new cross-arm.
Construction point: must satisfy in the process of work:
1, wire all must not lose " two pipe protections " of wire at any time;
2, must arrange the special messenger to fix a point at any time to monitor the stressing conditions of temporary guy and electric pole and the safe distance of the scissors crossing power circuit below circuit.
Work tool is prepared:
1,2,12 * 40 meters steel wire ropes of φ (temporary guy of electric pole);
2,3T Lever Blocks 2 is (on cross-arm, the degree of tightness wire uses);
3,2T Lever Blocks 4 is (on shaft, interim firm wire uses);
4,6,14 * 1.5 meters steel wire covers of φ (4 Lever Blocks that are used for 2T, 2 Lever Blocks that are used for 3T);
5,2,12 * 2 meters steel wire covers of φ (on cross-arm, the degree of tightness wire uses);
6,4,12 * 3 meters steel wire covers of φ (on shaft, interim firm wire uses);
7,1,1T aluminium coaster (rope uses back and forth);
8, φ 16 * 40 off-white coir rope is 1;
9, M28 * 2 of 650 flower basket bolts (temporary guy use);
10,4 of φ 14 wire clips (temporary guy use);
11,8, the U-shaped ring (6 " two pipe protections " that are used for wire, 2 flower basket bolts that are used for temporary guy) of U-7.
In Fig. 1, dotted line represents Lever Blocks, and chain-dotted line represents the steel wire cover as wire two pipe protections.
The present invention changes the construction method of 35kV line tension pole cross arm, carries out according to the following steps:
A), when entering the working site, confirm that at first whether complete circuit and inspection bracing wire, distaff and pole-footing have or not abnormal conditions, check individual Work tool and produce Work tool;
B), step on bar, electrical verification, installing earth connection after the work permit order that obtains dispatching;
C), untie the drainage thread of three-phase conducting wire, then two φ 12 steel wire ropes are installed as temporary guy in 1 meter above old cross-arm 2, these two temporary guys should be on the distaff of two wires at the fixing point on ground, should confirm to use in the situation of distaff non-corroding of wire, bury ground pomegranate wood underground otherwise can only excavate the hole, hole on wire is equidirectional; Two temporary guys utilize turnbuckle to make temporary guy fastening stressed; Lever Blocks on tension-resistant rod 1 shaft and the steel wire cover that is enclosed within on wire hang between temporary guy and old cross-arm, so that shaft is well stressed under the condition of both sides wire tension balance;
D), utilize 14 * 1.5 meters steel wires of two φ to overlap the whole old cross-arm that encases, put at these two steel wires respectively and respectively hang a 3T Lever Blocks, carry out stringing and loose ends when identical to two limits of the same phase of old cross-arm, come the tension force of the old cross-arm of balance with this, spin and be out of shape in order to avoid make the cross-arm discontinuity; Use again 12 * 2 meters steel wire covers of 2 φ wire is entangled and wire is played two pipe protection effects; Install respectively two chucks on every phase conductor, a chuck is used for hanging the Lever Blocks at old cross-arm place, double hanging up stated shaft and is enclosed within steel wire cover on wire simultaneously, another chuck is used for hanging the steel wire cover of old cross-arm place wire, the peg Lever Blocks with it of holding concurrently simultaneously so just can guarantee that wire can not lose two pipe protection effects of wire during the transfer of hanging point place at any time on from old cross-arm hanging point to shaft;
E), at two temporary guy 4a, 4b(to replace original two wire bracing wire 3a, 3b) and old cross-arm 2 between, hang respectively the Lever Blocks of four 2T with the steel wire cover of 14 * 1.5 meters of four φ, 12 * 3 meters steel wire covers of four φ are installed again, to play two pipe protection effects to wire on the shaft between temporary guy and old cross-arm;
F), before taking off insulator string 5 hanging points, must carry out shock test to the Lever Blocks of its use, confirm the errorless rear hanging point bolt that just can take off insulator string, next just utilize to restrict back and forth insulator string is put to ground, reduce the weight of wire Lever Blocks when shifting one's position with this;
G), when carrying out stringing and loose ends, the work director must arrange the special messenger to guard the safe distance of the scissors crossing of temporary guy, shaft and circuit below at any time, completes smoothly to guarantee stringing and off-line working safety;
H), ease out the Lever Blocks that hangs on old cross-arm, hang over simultaneously that on shaft, Lever Blocks eases out speed and synchronously carries out fastening with the Lever Blocks on old cross-arm; When wire is transferred on shaft, the Lever Blocks on shaft slightly in the situation of belt tension, guarantees the safe distance to circuit below leap place simultaneously; At this moment the both sides of old cross-arm one side of tension-resistant rod 1 are mutually with regard to successful moving on shaft;
I), on the opposite side of old cross-arm repeats step c～h, just four limits on old cross-arm are all moved on shaft mutually, at this moment the wire on old cross-arm all soars, the work of the mutually old cross-arm of thereupon more changing sides;
J), old cross-arm is removed, utilize coaster and restrict back and forth after new cross-arm installation, c～h is reversed by above-mentioned steps, just the wire on shaft is all moved to new cross-arm hanging point place;
K), recover the three-phase drainage thread of circuit, removes two temporary guys, utilize back and forth rope to put down all Work tools on electric pole, after the dismounting earth connection, on bar, staff's lower beam successively, complete whole operation process.
Construction method of the present invention is exclusively used in the cross-arm that belt tension is changed 35kV circuit conventional type tension-resistant rod.When using this method construction, do not need a wire let-down that is replaced circuit on ground, just can complete the replacing of 35kV circuit conventional type tension pole cross arm.
Claims (1)
1. construction method of changing the 35kV line tension pole cross arm: it is characterized in that, carry out according to the following steps:
A), when entering the working site, confirm that at first whether complete circuit and inspection bracing wire, distaff and pole-footing have or not abnormal conditions, check individual Work tool and produce Work tool;
B), step on bar, electrical verification, installing earth connection after the work permit order that obtains dispatching;
C), untie the drainage thread of three-phase conducting wire, then install two φ 12 steel wire ropes as temporary guy at 1 meter, old cross-arm (2) top, these two temporary guys should be on the distaff of two wires at the fixing point on ground, should confirm to use in the situation of distaff non-corroding of wire, bury ground pomegranate wood underground otherwise can only excavate the hole, hole on wire is equidirectional; Two temporary guys utilize turnbuckle to make temporary guy fastening stressed; Lever Blocks on tension-resistant rod (1) shaft and the steel wire cover that is enclosed within on wire hang between temporary guy and old cross-arm, so that shaft is well stressed under the condition of both sides wire tension balance;
D), utilize 14 * 1.5 meters steel wires of two φ to overlap the whole old cross-arm that encases, put at these two steel wires respectively and respectively hang a 3T Lever Blocks, carry out stringing and loose ends when identical to two limits of the same phase of old cross-arm, come the tension force of the old cross-arm of balance with this, spin and be out of shape in order to avoid make the cross-arm discontinuity; Use again 12 * 2 meters steel wire covers of 2 φ wire is entangled and wire is played two pipe protection effects; Install respectively two chucks on every phase conductor, a chuck is used for hanging the Lever Blocks at old cross-arm place, hold concurrently simultaneously and hang the steel wire cover that is enclosed within step c) on wire, another chuck is used for hanging the steel wire cover of old cross-arm place wire, the peg Lever Blocks with it of holding concurrently simultaneously so just can guarantee that wire can not lose two pipe protection effects of wire during the transfer of hanging point place at any time on from old cross-arm hanging point to shaft;
E), between two temporary guys (4a, 4b) and old cross-arm (2), hang respectively the Lever Blocks of four 2T with the steel wire cover of 14 * 1.5 meters of four φ, 12 * 3 meters steel wire covers of four φ are installed again, to play two pipe protection effects to wire on the shaft between temporary guy and old cross-arm;
F), before taking off insulator string (5) hanging point, must carry out shock test to the Lever Blocks of its use, confirm the errorless rear hanging point bolt that just can take off insulator string, next just utilize to restrict back and forth insulator string is put to ground, reduce the weight of wire Lever Blocks when shifting one's position with this;
G), when carrying out stringing and loose ends, the work director must arrange the special messenger to guard the safe distance of the scissors crossing of temporary guy, shaft and circuit below at any time, completes smoothly to guarantee stringing and off-line working safety;
H), ease out the Lever Blocks that hangs on old cross-arm, hang over simultaneously that on shaft, Lever Blocks eases out speed and synchronously carries out fastening with the Lever Blocks on old cross-arm; When wire is transferred on shaft, the Lever Blocks on shaft slightly in the situation of belt tension, guarantees the safe distance to circuit below leap place simultaneously; At this moment the both sides of old cross-arm one side of tension-resistant rod (1) are mutually with regard to successful moving on shaft;
I), on the opposite side of old cross-arm repeats step c-h, just four limits on old cross-arm are all moved on shaft mutually, at this moment the wire on old cross-arm all soars, the work of the mutually old cross-arm of thereupon more changing sides;
J), old cross-arm is removed, utilize coaster and restrict back and forth after new cross-arm installation, c～h is reversed by above-mentioned steps, just the wire on shaft is all moved to new cross-arm hanging point place;
K), recover the three-phase drainage thread of circuit, removes two temporary guys, utilize back and forth rope to put down all Work tools on electric pole, after the dismounting earth connection, on bar, staff's lower beam successively, complete whole operation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123696 CN102290738B (en) | 2011-05-13 | 2011-05-13 | Construction method for replacing 35kV line tension pole cross arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110123696 CN102290738B (en) | 2011-05-13 | 2011-05-13 | Construction method for replacing 35kV line tension pole cross arm |
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| CN102290738A CN102290738A (en) | 2011-12-21 |
| CN102290738B true CN102290738B (en) | 2013-06-19 |
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| CN 201110123696 Active CN102290738B (en) | 2011-05-13 | 2011-05-13 | Construction method for replacing 35kV line tension pole cross arm |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104218496A (en) * | 2014-09-16 | 2014-12-17 | 国家电网公司 | Method for inverse climbing cross arm replacement for live line |
| CN106786134B (en) * | 2016-11-30 | 2018-03-20 | 国网上海市电力公司 | Electrodynamic type jacks the construction method of do not have a power failure resistance to opening and closing and cross-arm equipment |
| CN113889900A (en) * | 2021-08-30 | 2022-01-04 | 国网浙江省电力有限公司嘉兴供电公司 | Construction method for live migration strain tower and wire of distribution network |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201113303Y (en) * | 2007-03-23 | 2008-09-10 | 上海市电力公司超高压输变电公司 | Electriferous replacing device of strain-resisting insulator bunch for high-voltage transmission line |
| US7589640B2 (en) * | 2005-01-28 | 2009-09-15 | Dennis Lee Bell | Utility pole and tower safety and protection device |
-
2011
- 2011-05-13 CN CN 201110123696 patent/CN102290738B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7589640B2 (en) * | 2005-01-28 | 2009-09-15 | Dennis Lee Bell | Utility pole and tower safety and protection device |
| CN201113303Y (en) * | 2007-03-23 | 2008-09-10 | 上海市电力公司超高压输变电公司 | Electriferous replacing device of strain-resisting insulator bunch for high-voltage transmission line |
Non-Patent Citations (4)
| Title |
|---|
| 不松导线法更换腐蚀横担新法;肖金桂;《安全与健康》;20051225(第23期);第35-36页 * |
| 带电更换横担的新工具和新方法-玻璃钢绝缘横担替换法;胡定超;《高电压技术》;19850320(第01期);第81-83页 * |
| 肖金桂.不松导线法更换腐蚀横担新法.《安全与健康》.2005,(第23期),第35-36页. |
| 胡定超.带电更换横担的新工具和新方法-玻璃钢绝缘横担替换法.《高电压技术》.1985,(第01期),第81-83页. |
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Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121219 |
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Effective date of registration: 20121219 Address after: 621000 Mianyang city of Sichuan Province sword South Road West No. 16 Applicant after: Mianyang Electric Power Bureau, Sichuan Electric Power Corporation Applicant after: State Grid Corporation of China Address before: 621000 Mianyang city of Sichuan Province sword South Road West No. 16 Applicant before: Mianyang Electric Power Bureau, Sichuan Electric Power Corporation |
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