CN111431092B - Installation optimization method for gap type wire balance hanging wire - Google Patents
Installation optimization method for gap type wire balance hanging wire Download PDFInfo
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- CN111431092B CN111431092B CN202010112465.1A CN202010112465A CN111431092B CN 111431092 B CN111431092 B CN 111431092B CN 202010112465 A CN202010112465 A CN 202010112465A CN 111431092 B CN111431092 B CN 111431092B
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- 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
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
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- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
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- 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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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Abstract
The invention discloses a method for optimizing the installation of a balanced hanging wire of a gapped wire, which comprises the following steps: s1, construction preparation: determining the length of a replacement lead segment, the number of iron towers and the type of the iron towers in the replacement lead segment interval, calculating the tension of a lead wire and the tension of an accessory installation wire lifting force; determining a wire hanging scheme, a wire lifting scheme and the type and specification of a mounting construction tool; s2, installing a construction tool; s3, hanging wires and pressing; s4, tightening the wire; s5, marking and pressing operation; and N strain towers are arranged in the wire section replacement interval, a tangent tower is arranged in the middle of each adjacent strain tower, and N is an odd number. According to the scheme, the operation sequence and the wire tightening mode are changed to greatly reduce the workload and shorten the construction period, and the aluminum layer and the steel core are crimped into a whole by the special traction head for the gap type wire and then are directly tightened, scribed and pressed at high altitude by the wire pulley to reduce labor force, improve efficiency and reduce labor intensity.
Description
Technical Field
The invention relates to the field of power transmission and transformation power line construction processes, in particular to a method for optimizing installation of a balanced hanging wire of a gap type wire.
Background
With the rapid development of social economy, the power transmission capacity of the original power transmission line cannot meet the requirements of the current economic development, and newly-built lines face the problems of land requisition, large cost investment, long construction period and the like, only a suspension clamp and a strain clamp need to be replaced by adopting a gap type lead and utilizing an iron tower of the original line, the problem of the safe distance between the lead and the ground and a spanning object caused by insufficient height of the original iron tower can be avoided due to the low sag characteristic (aluminum wires and steel cores are made of heat-resistant materials), the normal operation temperature of the lead can be greatly improved, and the power transmission amount is 1.6-2.0 times of that of the lead with the same diameter, so that the capacity increasing purpose.
As shown in fig. 1, the tension tower 1# -tension tower 5# section adopts the old wire of the tension integrated machine to draw the new wire to complete the wire replacement work, the special characteristics of the gap type wire, namely that the aluminum layer and the steel core layer have relative slippage and the tension is almost completely stressed by the steel core, must be drawn by a compression joint type drawing head, and the wire replacement work is completed and then starts the balanced wire hanging work, and the traditional wire balanced wire hanging process directly tightens, scratches and compresses the wire at high altitude. The fastest and most reasonable balanced hanging sequence of corresponding common leads is as follows: firstly, hanging wires on the 5# small side of the strain tower and the 1# large side of the strain tower, and finally tightening wires on the 3# two sides of the strain tower. The working sequence has the defects that the excess line collecting workload of the tension tower No. 3 in the line tightening construction process is very large, because the gap type lead needs to adopt the anchor line pre-twisted wire as the whole lead of the gap type lead to break and strip the lead aluminum layer after the anchor line is tightened, and then adopts the steel core line pre-twisted wire to tighten the line at high altitude, scratch and press, the workload is increased greatly due to the fact that the excess line amount is large, the times of the line reversing line tackle set are increased, the length of the stripped lead is increased, and the like.
Disclosure of Invention
The invention aims to solve the problem of large workload increase caused by the operation sequence of the traditional wire balance hanging process, provides an installation optimization method of the gap wire balance hanging, greatly reduces the workload and shortens the construction period by changing the operation sequence and the wire tightening mode, adopts a special traction head for the gap wire to press and connect an aluminum layer and a steel core into a whole, and then directly tightens the wire on the ground through a wire pulley, scratches and presses the wire at high altitude to reduce the labor force and improve the efficiency, reduce the labor intensity, reduce the high altitude operation, improve the operation environment and ensure the construction safety.
In order to achieve the technical purpose, the invention provides a technical scheme that the installation optimization method of the gap type wire balance hanging wire comprises the following steps:
s1, construction preparation: determining the length of a replacement lead segment, the number of iron towers and the type of the iron towers in the replacement lead segment interval, calculating the tension of a lead wire and the tension of an accessory installation wire lifting force; determining a wire hanging scheme, a wire lifting scheme and the type and specification of a mounting construction tool;
s2, installing a construction tool;
s3, hanging wires and pressing;
s4, tightening the wire;
s5, scribing and crimping operations.
In the scheme, wires are hung on two sides of a middle strain tower, then the small-size sides and the large-size sides of the strain towers at two ends are simultaneously tightened by adopting a compression type traction head ground, and then high-altitude marking and compression joint are completed; the ground wire tightening of the compression-joint type traction head greatly reduces the workload of overhead operation, reduces the times of a reversing block set, improves the efficiency, reduces the labor intensity, improves the operation environment and improves the safety guarantee.
Preferably, the replacement wire section interval is provided with N strain towers, and a tangent tower is arranged in the middle of each adjacent strain tower, wherein N is an odd number.
Preferably, the construction tool comprises a crimping type traction head, a metal string, a pulley block, a tension tube clamp tube, a steel core stringing pre-twisted wire, a chain block and a tension tube steel core, wherein the metal string is fixed on a wire hanging arm of a tension tower and a tangent tower, one end of the chain block is connected with one end of the metal string, the other end of the chain block is connected with the steel core stringing pre-twisted wire, one end of the anchor wire pre-twisted wire is wound on a pulley of the pulley block and penetrates through the tension clamp aluminum tube to extend for a certain distance, a sheath of the extending wire is peeled off to expose the steel core, the tail end of the steel core is fixedly provided with the tension tube steel core, one end of the old wire is fixedly connected with the crimping type traction head, the crimping type traction head is connected with a pulley of the pulley block, one end of a steel cable is wound around the pulley to be connected with a grinder, and the other end of.
Preferably, in step S3, the (N + 1)/2 th strain tower hanging wire is adopted, then the (N + 1)/2 th strain tower hanging wire is hung, after the wire is unfolded, the two sides of the anchor wire pre-twisted wire are simultaneously tightened to cut the wire into a natural loose state, then the strain clamp aluminum pipe is penetrated through the wire, then the aluminum strand is stripped for 3 meters, 3-4 strands are selected for one time, then the steel core pre-twisted wire with the length of 1.5 meters and the hand plate hoist are used for tightening and adjusting the sag crimping of the steel core, after the steel core crimping is completed, the anchor wire is loosened to stress the steel core, and finally the aluminum layer crimping aluminum pipe is recovered to complete the wire hanging and pressing operation.
Preferably, in step S4, the 1 st and nth tension towers are used as two-end towers of the replacement line, two ends of the wire are connected with the crimping type traction head, the crimping type traction head is connected with the pulley of the tackle pulley, the steel cable is connected with the winching machine by passing one end of the pulley, and the other end is connected with the ground anchor.
Preferably, in step S5, in a tight line segment, the observed sag value should be slightly smaller than the standard value designed or calculated at the corresponding temperature, then the loosening value is slightly larger than the standard value, the sag is observed after the conductor is stabilized, the sag is tightened again after repeating the operation for two times, the sag is stabilized within the standard value, then the high altitude marking operation is completed, the steel core pre-twisted wire is adopted to tighten the conductor into a natural loose state, the conductor is cut at the position of the primary marking and then the strain clamp aluminum tube is threaded, then the aluminum strand is stripped for 3 meters, 3-4 strands are needed for one time, the steel core pre-twisted wire with the length of 1.5 meters and the steel core calabash are adopted to tighten and adjust the sag to be pressed against the steel core, the steel core pre-twisted wire is hung and loosened after the steel core is pressed, so that the aluminum layer is pressed against the aluminum tube, and finally the wire tightening and pressing operation work is completed.
The invention has the beneficial effects that: aiming at the particularity of the gap type wire that relative slippage exists between an aluminum layer and a steel core layer and tension is almost completely stressed by the steel core, so that wire tightening allowance cannot be accurately calculated, marking difficulty is increased, and the process of a crimping flow is complicated, the aluminum layer and the steel core are crimped into a whole by adopting a special traction head for the gap type wire through optimizing a balanced wire hanging process flow, and then the aluminum layer and the steel core are directly tightened, marked and crimped on the ground through a wire pulley, so that labor force is reduced, efficiency is improved, labor intensity is reduced, high-altitude operation is reduced, the operating environment is improved, and construction safety is ensured.
Drawings
Fig. 1 is a construction schematic diagram of the traditional gap type wire balance hanging line installation optimization method.
Fig. 2 is a first partial construction schematic diagram of the installation optimization method for the balanced hanging wire of the intermittent lead according to the invention.
Fig. 3 is a schematic view of local construction by adopting the intermittent wire balance hanging installation optimization method of the invention.
Fig. 4 is a schematic view of local construction in the method for optimizing the installation of the intermittent wire balanced hanging wire according to the present invention.
Detailed Description
For the purpose of better understanding the objects, technical solutions and advantages of the present invention, the following detailed description of the present invention with reference to the accompanying drawings and examples should be understood that the specific embodiment described herein is only a preferred embodiment of the present invention, and is only used for explaining the present invention, and not for limiting the scope of the present invention, and all other embodiments obtained by a person of ordinary skill in the art without making creative efforts shall fall within the scope of the present invention.
Example (b): the installation optimization method for the gap type wire balance hanging wire comprises the following steps.
Step S1, construction preparation: determining the length of a replacement lead segment, the number of iron towers and the type of the iron towers in the replacement lead segment interval, calculating the tension of a lead wire and the tension of an accessory installation wire lifting force; determining a wire hanging scheme, a wire lifting scheme and the type and specification of a mounting construction tool;
the section of the replacement wire section is provided with 3 strain towers and two tangent towers, the middle of each adjacent strain tower is provided with one tangent tower, and the number of each adjacent strain tower is 1#, 2#, 3#, 4# and 5# from left to right.
Step S2, as shown in fig. 2, mounting a work tool; the tool comprises a crimping type traction head, a hardware string, a pulley group, a tension resistant pipe clamp tube, a steel core tightening wire preformed armor rod, a hand plate gourd and a tension resistant pipe steel core, wherein the hardware string is fixed on a wire hanging arm of a tension resistant tower and a tangent tower, one end of the hand plate gourd is connected with one end of the hardware string, the other end of the hand plate gourd is connected with the steel core tightening wire preformed armor rod, one end of the anchor wire preformed armor rod is wound on a pulley of the pulley group and penetrates through the tension resistant pipe clamp aluminum tube to extend for a certain distance, the outer skin of the extending wire is stripped to expose the steel core, the tail end of the steel core is fixedly provided with the tension resistant pipe steel core, one end of the old wire is fixedly connected with the crimping type traction head, the crimping type traction head is connected with a pulley of the pulley group, a steel cable bypasses one end and is connected with a winching machine.
Step S3, hanging wire and pressing operation; as shown in fig. 3, firstly, a 3# hanging wire of a middle strain tower is adopted, then, 2# and 5# hanging wires of the linear tower are hung, after the wires are unfolded, two sides of an anchor wire pre-twisted wire are simultaneously tightened to enable the wires to be in a natural relaxation state, the wires are cut off, then, a strain clamp aluminum pipe is threaded, 3 m of aluminum strands are peeled off, preferably 3-4 strands are used once, a steel core wire tensioning pre-twisted wire with the length of 1.5 m and a plate gourd are used for tightening and adjusting an arc-shaped vertical compression joint steel core, after the steel core compression joint is completed, the anchor wire is loosened to enable the steel core to bear force, and finally, an aluminum layer is recovered to be compressed and connected with the aluminum pipe to complete wire hanging and.
Step S4, tightening the wire; as shown in figure 4, the tension towers 1# and 5# are used as iron towers at two ends of an alternative line, two ends of a lead are connected with crimping type traction heads, the crimping type traction heads are connected with pulleys of a pulley block, a steel cable is connected with a winching machine by bypassing one end of each pulley, and the other end of each steel cable is connected with an earth anchor.
Step S5, a scribing and crimping operation; in a tight line section, firstly making the observation sag value slightly smaller than a standard value designed or calculated by a corresponding temperature, then making the loosening value slightly larger than the standard value, observing the sag after the conductor is stabilized, repeating the operation for one time and two times, then tightening to make the sag stable within the standard value, then completing the high-altitude marking operation, then adopting an anchor wire pre-twisted wire to tighten the conductor into a natural loose state, cutting the conductor at the position of one marking, then penetrating through a strain clamp aluminum pipe, then stripping 3 m aluminum strands, preferably tightening 3-4 strands once, then using a steel core pre-twisted wire with the length of 1.5 m and a plate gourd to tighten and adjust the sag to press the steel core, hanging the wire to loose the anchor wire after the steel core is pressed, enabling the steel core to bear force, and finally recovering the aluminum layer to press the aluminum layer to finish the wire tightening and pressing operation.
The above-mentioned embodiments are preferred embodiments of the method for optimizing the balanced suspension of the interstitial conductive wires according to the present invention, and the scope of the present invention is not limited thereto, and the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes in shape and structure according to the present invention are within the protection scope of the present invention.
Claims (4)
1. The method for optimizing the installation of the balanced hanging wire of the intermittent wire is characterized by comprising the following steps: the method comprises the following steps:
s1, construction preparation: determining the length of a replacement lead segment, the number of iron towers and the type of the iron towers in the replacement lead segment interval, calculating the tension of a lead wire and the tension of an accessory installation wire lifting force; determining a wire hanging scheme, a wire lifting scheme and the type and specification of a mounting construction tool;
s2, installing a construction tool;
s3, hanging wires and pressing;
s4, tightening the wire;
s5, marking and pressing operation;
n strain towers are arranged in the wire section replacement interval, a tangent tower is arranged in the middle of each adjacent strain tower, wherein N is an odd number;
the construction tool comprises a crimping type traction head, a hardware string, a pulley group, a tension resistant pipe clamp tube, a steel core tightening wire pre-twisted wire, a hand plate gourd and a tension resistant pipe steel core, wherein the hardware string is fixed on a wire hanging arm of a tension resistant tower and a tangent tower, one end of the hand plate gourd is connected with one end of the hardware string, the other end of the hand plate gourd is connected with the steel core tightening wire pre-twisted wire, one end of the anchor wire pre-twisted wire is wound on a pulley of the pulley group and penetrates through the tension resistant pipe clamp aluminum tube to extend for a certain distance, the outer skin of the extended wire is stripped to expose the steel core, the tail end of the steel core is fixedly provided with the tension resistant pipe steel core, one end of the old wire is fixedly connected with the crimping type traction head, the crimping type traction head is connected with a pulley of the pulley group, one end of a steel cable is wound around the pulley.
2. The method for optimizing the installation of the interstitial wire balance suspension according to claim 1, wherein:
in the step S3, firstly, (N + 1)/2 strain tower hanging wires are adopted, then the linear tower hanging wires on the two sides of the (N + 1)/2 strain tower are hung, after the wires are unfolded, the two sides of an anchor wire pre-twisted wire are simultaneously tightened to enable the wires to be in a natural relaxation state, the wires are cut off and then penetrate through a strain clamp aluminum pipe, then 3 m of aluminum strands are stripped, 3-4 strands are preferably used at one time, a steel core wire tensioning pre-twisted wire with the length of 1.5 m and a plate block are used for tightening and adjusting an arc sag to press and connect the steel core, after the steel core is pressed and connected, the anchor wire is loosened to enable the steel core to bear force, and finally, the aluminum layer is recovered to press and connect the aluminum pipe to complete the wire hanging and pressing operation.
3. The method for optimizing the installation of the interstitial wire balance suspension according to claim 1, wherein:
in step S4, the 1 st and nth tension towers are used as iron towers at two ends of the replacement line, two ends of the wire are connected with crimping type traction heads, the crimping type traction heads are connected with pulleys of the pulley block, a steel cable is connected with a winching machine by bypassing one end of the pulley, and the other end of the steel cable is connected with a ground anchor.
4. The method for optimizing the installation of the interstitial wire balance suspension according to claim 1, wherein:
in step S5, in a tight line segment, firstly making the observation sag value slightly smaller than the standard value designed or calculated by the corresponding temperature, then making the return value slightly larger than the standard value, observing the sag after the conductor is stabilized, repeating the operation for one time and two times, then tightening to make the sag stable within the standard value, then completing the high altitude marking operation, then adopting anchor wire pre-twisted wire to tighten the conductor into a natural relaxation state, cutting the conductor at the position of the steel core at the primary marking position, then penetrating through the strain clamp, peeling off 3 meters of aluminum strands, pressing 3-4 strands at one time, then using the steel core tight wire pre-twisted wire with the length of 1.5 meters and the chain block to tighten and adjust the sag to press the steel core, hanging the wire and loosening the anchor wire after the steel core is pressed to make the aluminum core stressed, and finally recovering the aluminum layer to press the aluminum layer to finish the wire tightening and pressing operation.
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| CN202010112465.1A CN111431092B (en) | 2020-02-24 | 2020-02-24 | Installation optimization method for gap type wire balance hanging wire |
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| CN202010112465.1A CN111431092B (en) | 2020-02-24 | 2020-02-24 | Installation optimization method for gap type wire balance hanging wire |
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| CN114221263B (en) * | 2021-12-01 | 2023-07-18 | 浙江省送变电工程有限公司 | Method for replacing Zhang Dace damaged wire resistant among multi-split wire files in long distance |
| CN114895419B (en) * | 2022-04-06 | 2023-09-08 | 浙江泰仑电力集团有限责任公司 | Optical cable tightening construction method |
| CN115132043A (en) * | 2022-07-27 | 2022-09-30 | 国网山西省电力公司晋城供电公司 | Simulation training teaching aid for power transmission line construction and method thereof |
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| WO2008124579A1 (en) * | 2007-04-05 | 2008-10-16 | Barthold Lionel O | Apparatus and method for enhancing the reconductoring of overhead electric power lines |
| CN201430397Y (en) * | 2009-06-19 | 2010-03-24 | 河南省电力勘测设计院 | Double-column overhang tension tower |
| CN102097766A (en) * | 2010-12-24 | 2011-06-15 | 绍兴电力局 | Strain-resistant lead hanging process for gap type lead |
| CN104929410B (en) * | 2015-04-28 | 2017-08-01 | 国核电力规划设计研究院 | A kind of overhead transmission line |
| US10944248B2 (en) * | 2018-03-16 | 2021-03-09 | Avista Corporation | Smart hoist |
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