CN109802332A - A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process - Google Patents
A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process Download PDFInfo
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- CN109802332A CN109802332A CN201811596889.9A CN201811596889A CN109802332A CN 109802332 A CN109802332 A CN 109802332A CN 201811596889 A CN201811596889 A CN 201811596889A CN 109802332 A CN109802332 A CN 109802332A
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- tension value
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- stringing
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Abstract
The invention belongs to transmission line fields, and in particular to a kind of method that grounded-line stringing controls sag of conductor and ground wire in the process, the hanging point difference in height for including the following steps: S1, obtaining observation shelves two sides between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower；S2, design tension value of conducting wire during stringing, S3, the real-time tension value for obtaining conducting wire during stringing are calculated by the following formula；S4, real-time tension value obtained in S3 is compared with design tension value obtained in S2, when real-time tension value is less than the 80% of design tension value, pulling equipment remains a constant speed traction, when real-time tension value 80% up to or over design tension value, pulling equipment slows down hauling speed, it keeps grounded-line steadily to draw, until real-time tension value is equal to design tension value, stops traction.The beneficial effects of the present invention are: comparing real-time tension value and design tension value, so that arc sag actual value is consistent with arc sag design value after the completion of guaranteeing conducting wire traction.
Description
Technical field
The invention belongs to transmission line fields, and in particular to a kind of grounded-line stringing controls the side of sag of conductor and ground wire in the process
Method.
Background technique
It include: the items work such as unwrapping wire, stringing, sag observation and attachment installation in transmission line of electricity stringing partitioned project.Wherein
Include drawing grounded-line during stringing, after the completion of spreading lead wire and earth wire, needs to measure the practical arc sag of conducting wire, really
It is identical as design arc sag to protect actual measurement arc sag.
In the prior art, the method for measuring arc sag has: etc. regular ways, different regular way, preset angle configuration, look squarely method.Above-mentioned four kinds of methods
It is by naked eyes or instrument (theodolite or total station) specific calculation formula measurement arc sag, but in specific construction ring
Border, for example site contour limitation or foggy weather, carry on construction work at night, the prior art just can not normal observation arc sag.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide sag of conductor and ground wire is controlled during a kind of grounded-line stringing
Method, in grounded-line distraction procedure, by control grounded-line tension, achieve the purpose that spacing control arc sag, it can be ensured that
After the completion of spreading lead wire and earth wire, the practical arc sag of grounded-line and design arc sag reach unanimously, no longer need to specially to practical arc sag into
Row measurement.
The present invention provides the following technical solutions:
S1, the hanging point height for obtaining observation shelves two sides between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower
Difference；
S2, it is calculated by the following formula design tension value of grounded-line during stringing,
Wherein, H is the design tension value of grounded-line during stringing, and f is the design value of arc sag, and l is adjacent two shaft tower
Horizontal linear distance, ω is grounded-line than carrying, and h observe the hanging point difference in height of shelves two sides for adjacent two shaft tower between, and φ is sight
Survey shelves two sides hanging point height difference angle；
S3, the real-time tension value for obtaining grounded-line during stringing；
S4, real-time tension value obtained in S3 is compared with design tension value obtained in S2, works as real-time tension value
Less than design tension value 80% when, pulling equipment remains a constant speed traction, to real-time tension value up to or over designing tension
Value 80% when, pulling equipment slows down hauling speed, keeps grounded-line steadily to draw, until real-time tension value is equal to design tension
Value stops traction.
Preferably, in the S3, the real-time tension value of grounded-line during stringing is obtained by stringing Work tool.
Preferably, the stringing Work tool includes tensiometer, value of thrust display terminal, wirerope, pulley assembly, motor-driven strand
Mill and gripper, the pulley assembly are mounted on the shaft tower of construction site, and the gripper and grounded-line are constituted and be engaged by clamping,
The wirerope first end is connected with motor-driven grinding mill, second end is connected around pulley assembly with tensiometer first end, the pulling force
Meter second end is connected with gripper, and the tensiometer and value of thrust display terminal are wirelessly connected.
Preferably, it is obtained by total station and observes shelves between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower
The hanging point difference in height of two sides.
The beneficial effects of the present invention are: the design sag value of grounded-line is converted into design tension by formula by the present invention
Then value measures real-time tension value during stringing by tensiometer, when real-time tension value is less than design tension value 80%
When, pulling equipment remains a constant speed traction, and when real-time tension value is up to or over design tension value 80%, pulling equipment slows down
Hauling speed keeps grounded-line steadily to draw, until real-time tension value is equal to design tension value, stops traction, leads in grounded-line
During drawing, by controlling grounded-line tension, achieve the purpose that spacing controls arc sag, it can be ensured that complete in spreading lead wire and earth wire
Afterwards, the practical arc sag of grounded-line and design arc sag reach unanimously, no longer need to specially measure practical arc sag.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for drawing conducting wire；
Fig. 2 is the structural schematic diagram of tension equipment.
Attached meaning marked in the figure is as follows:
1- tensiometer 2- value of thrust display terminal 3- wirerope 4- pulley assembly 5- motor-driven grinding mill 6- gripper 7-
Grounded-line
Specific embodiment
The present invention is illustrated combined with specific embodiments below.
A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process, includes the following steps:
S1, observation shelves two sides between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower are obtained by total station
Hanging point difference in height；
S2, it is calculated by the following formula design tension value of grounded-line during stringing,
Wherein, H is the design tension value of grounded-line during stringing, and f is design sag value, and l is adjacent two shaft tower
Horizontal linear distance, ω are grounded-line than carrying, and h observes the hanging point difference in height of shelves two sides between adjacent two shaft tower, and φ is observation
Shelves two sides hanging point height difference angle；
S3, the real-time tension value that grounded-line during stringing is obtained by stringing Work tool, the stringing Work tool packet
Include tensiometer 1, value of thrust display terminal 2, wirerope 3, pulley assembly 4, motor-driven grinding mill 5 and gripper 6, the gripper 6 with
Grounded-line 7, which is constituted, to be engaged by clamping, and 3 first end of wirerope is connected with motor-driven grinding mill 5, second end is around pulley assembly 4 and drawing
1 first end of power meter is connected, and 1 second end of tensiometer is connected with gripper 6, the tensiometer 1 and 2 nothing of value of thrust display terminal
Line connection, starting motor-driven grinding mill 5 carries out stringing to conducting wire 7, by 2 real-time monitoring conducting wire 7 of value of thrust display terminal in stringing mistake
By the size of tension in journey；
S4, real-time tension value obtained in S3 is compared with design tension value obtained in S2, works as real-time tension value
Less than design tension value 80% when, pulling equipment remains a constant speed traction, to real-time tension value up to or over designing tension
Value 80% when, pulling equipment slows down hauling speed, keeps conducting wire steadily to draw, until real-time tension value is equal to design tension
Value stops traction.
In a specific embodiment, Bangbu Yu meeting-Fengyang 22kv track remodelling engineering is right by means of the present invention
Grounded-line during 27#~28# grounded-line stringing is drawn,
S1, the horizontal linear distance that adjacent two shaft tower is obtained by total station are observed between 357m and adjacent two shaft tower
The hanging point difference in height 0m of shelves two sides；
S2, it is calculated by the following formula grounded-line and designs tension value during stringing,
Wherein, 15 DEG C when, the design sag value f of conducting wire is 6.922m, and the design sag value f of ground wire is 6.970m, adjacent
The horizontal linear distance l of two shaft towers is 357m, and conducting wire is 1.1782kg/m than carrying ω, and ground wire is 0.745kg/m, phase than carrying ω
The hanging point difference in height h that shelves two sides are observed between adjacent two shaft towers is 0m,
Then survey a grade two sides hanging point height difference angle
The design tension value of conducting wire
The design tension value of ground wire
S3, the real-time tension value that grounded-line during stringing is obtained by stringing Work tool, as shown in table 1；
Table 1
Bangbu Yu meeting~Fengyang 220kv track remodelling engineering conducting wire sag computational chart
Table 2
Bangbu Yu meeting~Fengyang 220kV track remodelling engineering ground wire sag computing table
S4, real-time tension value obtained in S3 is compared with design tension value obtained in S2, works as real-time tension value
When less than design tension value 80%, pulling equipment remains a constant speed traction, to real-time tension value up to or over designing tension value
When 80%, pulling equipment slows down hauling speed, and conducting wire is kept steadily to draw, until real-time tension value is equal to design tension value, stops
Only draw.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although referring to aforementioned reality
Applying example, invention is explained in detail, for those skilled in the art, still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features.It is all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (4)
1. controlling the method for sag of conductor and ground wire during a kind of grounded-line stringing, which comprises the steps of:
S1, the hanging point difference in height for obtaining observation shelves two sides between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower；
S2, it is calculated by the following formula design tension value of grounded-line during stringing,
Wherein, H is the design tension value of grounded-line during stringing, and f is the design value of arc sag, and l is the water of adjacent two shaft tower
Flat line distance, ω are grounded-line than carrying, and h observes the hanging point difference in height of shelves two sides between adjacent two shaft tower, and φ is observation shelves
Two sides hanging point height difference angle；
S3, the real-time tension value for obtaining grounded-line during stringing；
S4, real-time tension value obtained in S3 is compared with design tension value obtained in S2, when real-time tension value is less than
When designing the 80% of tension value, pulling equipment remains a constant speed traction, to real-time tension value up to or over designing tension value
When 80%, pulling equipment slows down hauling speed, and grounded-line is kept steadily to draw, until real-time tension value is equal to design tension value,
Stop traction.
2. controlling the method for sag of conductor and ground wire during a kind of grounded-line stringing according to claim 1, which is characterized in that
In the S3, the real-time tension value of conducting wire during stringing is obtained by stringing Work tool.
3. controlling the method for sag of conductor and ground wire during a kind of grounded-line stringing according to claim 2, which is characterized in that
The stringing Work tool includes tensiometer (1), value of thrust display terminal (2), wirerope (3), pulley assembly (4), motor-driven grinding mill
(5) it is mounted on the shaft tower of construction site with gripper (6), the pulley assembly (4), the gripper (6) and grounded-line (7)
It constitutes and is engaged by clamping, wirerope (3) first end is connected with motor-driven grinding mill (5), second end is around pulley assembly (4) and pulling force
It counts (1) first end to be connected, tensiometer (1) second end is connected with gripper (6), and the tensiometer (1) and value of thrust are shown
Terminal (2) is wirelessly connected.
4. controlling the method for sag of conductor and ground wire during a kind of grounded-line stringing according to claim 1, which is characterized in that
The hanging point height that shelves two sides are observed between the horizontal linear distance and adjacent two shaft tower of adjacent two shaft tower is obtained by total station
Difference.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811596889.9A CN109802332A (en) | 2018-12-26 | 2018-12-26 | A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811596889.9A CN109802332A (en) | 2018-12-26 | 2018-12-26 | A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process |
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| CN109802332A true CN109802332A (en) | 2019-05-24 |
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| CN201811596889.9A Pending CN109802332A (en) | 2018-12-26 | 2018-12-26 | A kind of method that grounded-line stringing controls sag of conductor and ground wire in the process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406558A (en) * | 2014-12-16 | 2015-03-11 | 云南电网有限责任公司普洱供电局 | Method for monitoring power transmission line sag |
| CN104485608A (en) * | 2014-11-21 | 2015-04-01 | 国家电网公司 | Overhead transmission line tightening construction method |
| CN104993424A (en) * | 2015-07-09 | 2015-10-21 | 三峡大学 | Sag observation method for power transmission line engineering construction |
| CN106323529A (en) * | 2016-10-20 | 2017-01-11 | 国家电网公司 | Method and device adopting tension meter for performing wire sag measurement |
| CN108134339A (en) * | 2017-12-14 | 2018-06-08 | 浙江省送变电工程有限公司 | Assembly type overhead construction method across in isolated shelves high ferro |
-
2018
- 2018-12-26 CN CN201811596889.9A patent/CN109802332A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485608A (en) * | 2014-11-21 | 2015-04-01 | 国家电网公司 | Overhead transmission line tightening construction method |
| CN104406558A (en) * | 2014-12-16 | 2015-03-11 | 云南电网有限责任公司普洱供电局 | Method for monitoring power transmission line sag |
| CN104993424A (en) * | 2015-07-09 | 2015-10-21 | 三峡大学 | Sag observation method for power transmission line engineering construction |
| CN106323529A (en) * | 2016-10-20 | 2017-01-11 | 国家电网公司 | Method and device adopting tension meter for performing wire sag measurement |
| CN108134339A (en) * | 2017-12-14 | 2018-06-08 | 浙江省送变电工程有限公司 | Assembly type overhead construction method across in isolated shelves high ferro |
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Application publication date: 20190524 |