CN114374170A - Method for changing straight pole into strain pole and additionally installing switch on 10kV overhead line - Google Patents
Method for changing straight pole into strain pole and additionally installing switch on 10kV overhead line Download PDFInfo
- Publication number
- CN114374170A CN114374170A CN202111431972.2A CN202111431972A CN114374170A CN 114374170 A CN114374170 A CN 114374170A CN 202111431972 A CN202111431972 A CN 202111431972A CN 114374170 A CN114374170 A CN 114374170A
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- Prior art keywords
- strain
- insulating
- lead
- pole
- installing
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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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000012211 strain insulator Substances 0.000 claims abstract description 33
- 239000012212 insulator Substances 0.000 claims abstract description 15
- 238000009413 insulation Methods 0.000 claims description 17
- 238000012545 processing Methods 0.000 claims description 3
- 238000011900 installation process Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B3/00—Apparatus specially adapted for the manufacture, assembly, or maintenance of boards or switchgear
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention relates to a method for additionally installing a switch on a 10kV overhead line straight pole-to-strain pole, which comprises the following steps of: insulating and shielding the lead, the straight rod insulator and the cross arm, mounting a strain clamp and a strain insulator string in the second step, mounting an insulating tightener in the third step to realize the connection between the strain clamp and the strain insulator string and ensure that the strain insulator string bears the tension of the lead, mounting a switch on a column in the fourth step, measuring the current of the lead in the fifth step, and loosening the insulating tightener in the sixth step to realize that the strain insulator string bears the full tension of the lead and then removing the insulating and shielding; the invention has the advantages that: the whole installation process does not need to install an insulating drainage wire, the operation efficiency is greatly improved, and the live equipment on the rod is reduced, so that the interference increases the activity space of operators, the risks caused by overlarge contact resistance of the insulating drainage wire, limited through-current capacity and loose arc discharge in the installation process are avoided, and the safety is improved.
Description
Technical Field
The invention relates to a method for changing a straight pole into a strain pole of a 10kV overhead line and additionally installing a switch.
Background
In the process of power grid construction and maintenance, due to factors such as line installation section switches, load distribution, line tower migration and the like, an original straight pole needs to be changed into a tension pole under the conditions of no power outage and load, a pole-mounted switch is additionally arranged, and the conventional distribution network live working means is adopted to implement the working site as follows:
firstly, conducting insulation shielding measures on a lead, a straight line rod insulator and a cross arm;
secondly, removing the binding wires on the linear rod insulators, laying the wires flat, and tightening the wires on two sides of the cross arm by using an insulating wire tightener;
thirdly, a backup protection wire clamping device is arranged at the outer side (far away from the electric pole) of the insulation wire grip device, an insulation drainage wire is arranged between the backup protection wire clamping device and the insulation wire grip device,
fourthly, respectively measuring the shunts of the conducting wire and the insulating drainage wire by using a pincer-shaped ammeter, cutting off the conducting wire at the inner side (close to an electric pole) of the wire clamping device of the insulating wire grip after confirming that the shunts of the insulating drainage wire are normal, penetrating and fixing the conducting wire in an installed strain insulator string wire clamp, and removing a backup protection wire clamping device and the insulating wire grip;
fifthly, installing a pole-mounted switch, overlapping the lead of the pole-mounted switch on the leads at two sides, closing the pole-mounted switch, and removing the insulated drainage wire after normal shunt is confirmed through current measurement;
and sixthly, removing the insulation shield, and finishing the operation.
The above operation method and flow are complicated, the operation method needs to be mastered by operators, the operation method has enough skill level, and the following three disadvantages exist:
firstly, a backup protection wire clamping device is installed in the operation process, the wire clamping device occupies the operation space, and the installation and the removal of the wire clamping device increase the workload;
secondly, the insulating drainage wire is used, the workload of installing and removing the drainage wire is increased, each phase of operation needs 5 times of flow measurement, the flow is complicated, and the insulating drainage wire is particularly limited by large contact resistance and limited through-current capacity of the insulating drainage wire, so that certain hidden danger exists during installing and removing the insulating drainage wire.
Disclosure of Invention
The invention aims to provide a method for additionally installing a switch on a 10kV overhead line straight pole-to-strain pole without installing an insulated drainage wire, thereby improving the operation efficiency.
In order to solve the technical problems, the invention is realized by the following technical scheme: a method for changing a straight pole into a tension pole and additionally installing a switch on a 10kV overhead line comprises the following steps:
the method comprises the following steps: insulating and shielding the lead, the linear rod insulator and the cross arm;
step two: installing a strain clamp on the lead, and installing a strain insulator string on the cross arm;
step three: installing an insulating wire tightener, tightening the wires on the two sides, connecting the strain clamp with the strain insulator string and ensuring the connection reliability of the strain clamp and the strain insulator string; loosening the insulation tightener until the strain insulator string is slightly under the tension of the lead, and firmly installing the strain insulator string;
step four: installing the column switch, overlapping the column switch lead wires on the two side lead wires, and closing the column switch;
step five: measuring the current of the lead, cutting off the lead between the two strain clamps after normal shunting is confirmed, and processing a short tail wire;
step six: and slowly loosening the insulation tightener until the strain insulator string bears all tension of the lead, removing the insulation shield, and finishing the operation.
Preferably, the wires, the linear rod insulators and the cross arms in the step one are insulated and shielded by an insulating blanket.
Preferably, the insulating blanket is provided with a fixing clip.
Preferably, the distance from the strain clamp to the linear rod insulator in the second step is L, wherein: and L is 60-70 cm.
In conclusion, the invention has the advantages that: insulating shielding is carried out on a pair of wires, a linear rod insulator and a cross arm through the steps, a strain clamp and a strain insulator string are installed in the second step, an insulating tightener is installed in the third step to realize connection between the strain clamp and the strain insulator string and guarantee that the strain insulator string is under tension of the wires, a switch is installed on a column in the fourth step, the current of the wires is measured in the fifth step, the insulating tightener is loosened in the sixth step to realize that the strain insulator string bears all tension of the wires and then the insulating shielding is removed, so that an insulating drainage wire does not need to be installed in the whole installation process, the operation efficiency is greatly improved, live equipment on the rod is reduced, the activity space of an operator is increased by interference, the risks caused by overlarge contact resistance of the insulating drainage wire, limited through-flow capacity and loose arc-drawing in the installation process are avoided, the safety is improved, the workload is greatly reduced, the number of current measurement is reduced from five times to three times, the links of mounting and dismounting the backup protection rope are reduced, and the insulation tightener and the strain clamp are mutually backup protected during the operation of the new method.
Detailed Description
A method for changing a straight pole into a tension pole and additionally installing a switch on a 10kV overhead line comprises the following steps:
the method comprises the following steps: insulating and shielding the lead, the linear rod insulator and the cross arm;
step two: installing a strain clamp on the lead, and installing a strain insulator string on the cross arm;
step three: installing an insulating wire tightener, tightening the wires on the two sides, connecting the strain clamp with the strain insulator string and ensuring the connection reliability of the strain clamp and the strain insulator string; loosening the insulation tightener until the strain insulator string is slightly under the tension of the lead, and firmly installing the strain insulator string;
step four: installing the column switch, overlapping the column switch lead wires on the two side lead wires, and closing the column switch;
step five: measuring the current of the lead, cutting off the lead between the two strain clamps after normal shunting is confirmed, and processing a short tail wire;
step six: and slowly loosening the insulation tightener until the strain insulator string bears all tension of the lead, removing the insulation shield, and finishing the operation.
Insulating shielding is carried out on a pair of wires, a linear rod insulator and a cross arm through the steps, a strain clamp and a strain insulator string are installed in the second step, an insulating tightener is installed in the third step to realize connection between the strain clamp and the strain insulator string and guarantee that the strain insulator string is under tension of the wires, a switch is installed on a column in the fourth step, the current of the wires is measured in the fifth step, the insulating tightener is loosened in the sixth step to realize that the strain insulator string bears all tension of the wires and then the insulating shielding is removed, so that an insulating drainage wire does not need to be installed in the whole installation process, the operation efficiency is greatly improved, live equipment on the rod is reduced, the activity space of an operator is increased by interference, the risks caused by overlarge contact resistance of the insulating drainage wire, limited through-flow capacity and loose arc-drawing in the installation process are avoided, the safety is improved, the workload is greatly reduced, the number of current measurement is reduced from five times to three times, the links of mounting and dismounting the backup protection rope are reduced, and the insulation tightener and the strain clamp are mutually backup protected during the operation of the new method.
The wire, the straight line pole insulator and the cross arm in the step one are all insulated and shielded through the insulating blanket, the installation and the disassembly are convenient, the independent insulation and the shielding of the wire, the straight line pole insulator and the cross arm can be realized, the installation of the two-step strain clamp, the strain insulator string and the three-step insulating tightener is not influenced, the fixing clamp is arranged on the insulating blanket, the fixing quality of the insulating blanket can be improved, the insulating blanket is prevented from falling off in the installation process, the fixing clamp is convenient to install and disassemble and reliable in connection, the fixing clamp can be repeatedly utilized, the generation of garbage in the installation process is effectively avoided, the pollution to the environment is avoided, and the distance from the strain clamp to the straight line pole insulator in the step two is L, wherein: l is 60 ~ 70cm, can select the mounted position of strain clamp according to the strain insulator string of different models, satisfies different installation demands.
The above description is only an embodiment of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications within the technical field of the present invention by those skilled in the art are covered by the claims of the present invention.
Claims (4)
1. A method for changing a straight pole into a tension pole and additionally installing a switch on a 10kV overhead line is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: insulating and shielding the lead, the linear rod insulator and the cross arm;
step two: installing a strain clamp on the lead, and installing a strain insulator string on the cross arm;
step three: installing an insulating wire tightener, tightening the wires on the two sides, connecting the strain clamp with the strain insulator string and ensuring the connection reliability of the strain clamp and the strain insulator string; loosening the insulation tightener until the strain insulator string is slightly under the tension of the lead, and firmly installing the strain insulator string;
step four: installing the column switch, overlapping the column switch lead wires on the two side lead wires, and closing the column switch;
step five: measuring the current of the lead, cutting off the lead between the two strain clamps after normal shunting is confirmed, and processing a short tail wire;
step six: and slowly loosening the insulation tightener until the strain insulator string bears all tension of the lead, removing the insulation shield, and finishing the operation.
2. The method for installing the switch on the 10kV overhead line straight pole-to-tension pole as claimed in claim 1, wherein the method comprises the following steps: and (4) insulating and shielding the wires, the linear rod insulators and the cross arms in the step one through insulating blankets.
3. The method for installing the switch on the 10kV overhead line straight pole-to-tension pole as claimed in claim 2, wherein the method comprises the following steps: and the insulating blanket is provided with a fixing clamp.
4. The method for installing the switch on the 10kV overhead line straight pole-to-tension pole as claimed in claim 1, wherein the method comprises the following steps: and in the second step, the distance from the strain clamp to the linear rod insulator is L, wherein:
L＝60～70cm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431972.2A CN114374170A (en) | 2021-11-29 | 2021-11-29 | Method for changing straight pole into strain pole and additionally installing switch on 10kV overhead line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431972.2A CN114374170A (en) | 2021-11-29 | 2021-11-29 | Method for changing straight pole into strain pole and additionally installing switch on 10kV overhead line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114374170A true CN114374170A (en) | 2022-04-19 |
Family
ID=81139615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111431972.2A Pending CN114374170A (en) | 2021-11-29 | 2021-11-29 | Method for changing straight pole into strain pole and additionally installing switch on 10kV overhead line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114374170A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888073A (en) * | 2009-05-15 | 2010-11-17 | 上海市南电力工程有限公司 | On-load opened and segmented operating method of 10kV line |
| CN103532046A (en) * | 2013-10-16 | 2014-01-22 | 国家电网公司 | Operation method and device for additionally arranging column switch on linear rod improved strain section |
| JP2016059213A (en) * | 2014-09-11 | 2016-04-21 | 中国電力株式会社 | Tensile force relaxation device |
| CN108155601A (en) * | 2018-01-08 | 2018-06-12 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of method that on-load straight line pole changes tension-resistant rod |
| CN112636251A (en) * | 2020-12-31 | 2021-04-09 | 上海东捷建设(集团)有限公司第五分公司 | Method for changing 10kV straight pole into sectional pole in live mode |
-
2021
- 2021-11-29 CN CN202111431972.2A patent/CN114374170A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888073A (en) * | 2009-05-15 | 2010-11-17 | 上海市南电力工程有限公司 | On-load opened and segmented operating method of 10kV line |
| CN103532046A (en) * | 2013-10-16 | 2014-01-22 | 国家电网公司 | Operation method and device for additionally arranging column switch on linear rod improved strain section |
| JP2016059213A (en) * | 2014-09-11 | 2016-04-21 | 中国電力株式会社 | Tensile force relaxation device |
| CN108155601A (en) * | 2018-01-08 | 2018-06-12 | 国网辽宁省电力有限公司鞍山供电公司 | A kind of method that on-load straight line pole changes tension-resistant rod |
| CN112636251A (en) * | 2020-12-31 | 2021-04-09 | 上海东捷建设(集团)有限公司第五分公司 | Method for changing 10kV straight pole into sectional pole in live mode |
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