CN114221289B - Construction method for gap type self-damping wire long-span overhead line - Google Patents
Construction method for gap type self-damping wire long-span overhead line Download PDFInfo
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- CN114221289B CN114221289B CN202111452555.6A CN202111452555A CN114221289B CN 114221289 B CN114221289 B CN 114221289B CN 202111452555 A CN202111452555 A CN 202111452555A CN 114221289 B CN114221289 B CN 114221289B
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- 238000013016 damping Methods 0.000 title claims abstract description 37
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- 125000006850 spacer group Chemical group 0.000 claims abstract description 13
- 230000007480 spreading Effects 0.000 claims abstract description 6
- 238000003892 spreading Methods 0.000 claims abstract description 6
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- 229910052782 aluminium Inorganic materials 0.000 claims description 57
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000009434 installation Methods 0.000 claims description 14
- 239000004020 conductor Substances 0.000 claims description 13
- 238000002788 crimping Methods 0.000 claims description 10
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- 229910052742 iron Inorganic materials 0.000 claims description 9
- 238000004873 anchoring Methods 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
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Classifications
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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
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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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
-
- 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
Abstract
The invention discloses a gap type self-damping wire large-span overhead line construction method, and relates to the field of power line overhead line construction methods. The gap type self-damping wire is mostly applied to common crossing line engineering at present, and in the large crossing engineering, the construction difficulty of the gap type self-damping wire is high, and the construction safety is not guaranteed. The method comprises the steps that an unmanned aerial vehicle spreads and releases a primary guide rope; the stretching equipment is combined to spread the guide rope; a pulling and a spreading wire; one to stretch OPGW; high-altitude wire tightening and butt-joint full-tension wire hanging; the strain clamp and the traction pipe are hydraulically connected; installing a spanning tower attachment; and installing a wire spacer. According to the method, the traction wire yoke plate is omitted through one traction and one unwinding wire, the maximum use tension borne by the traction wire rope is reduced, the risks of turning over of the traction wire rope and winding of wires of the traction wire rope are avoided, the probability of winding or wearing of the traction wire rope is reduced, the construction difficulty of the large-span gap type self-damping wire is reduced, and the construction safety is improved.
Description
Technical Field
The invention relates to the field of power line overhead line construction methods, in particular to a gap type self-damping wire large-span overhead line construction method.
Background
The large-span engineering of the power transmission line becomes a throat and a bottleneck of the power transmission line due to the special importance of the large-span engineering. The design life of the large-crossing line is generally not less than 50 years, the design meteorological conditions are more strict than those of the general line, the engineering quantity is large, the construction period is long, and the investment is huge. The large span is large in span, the suspension point of the wire is high, the terrain is wide, the layer wind is easily formed in the air above the water surface, and the breeze vibration of the wire is stronger than that of a common line; meanwhile, the fact that the line is stressed and the sag of the wire is large is considered, an iron tower is required to be heightened for the purpose of ensuring crossing navigation, and engineering cost is increased intangibly and greatly. The current devices for preventing the vibration of overhead lines are mainly vibration-proof measures attached to the wires, such as vibration-proof hammers, damping wires, etc. This approach brings trouble in maintenance and repair, danger of fatigue damage of the damper itself, and the like. Because of these problems, it is considered to specially manufacture a wire having a large damping effect without the need for an additional damper, and this wire is called a self-damping wire because it is vibration-proof by its own damping. The self-damping wire has excellent self-damping performance due to the fact that gaps exist between the layers of the self-damping wire and a large amount of energy is consumed during vibration, and the self-damping performance is better than that of a common wire under larger tension, so that the average running tension can be improved. After the self-damping wire is adopted, the tension value of the wire is not limited by the average running tension any more, but is controlled by the maximum tension, the average running tension of the wire can be improved by at least 3-5 percentage points, sag can be obviously reduced, the height of the iron tower can be correspondingly reduced, the weight and the basic volume of the iron tower can be reduced, and the self-damping wire has obvious economic benefit and reduces engineering cost.
The self-damping wire comprises a gap type, and a plurality of wires in China are subjected to the gap type self-damping wire through capacity-increasing transformation, but the self-damping wire is mostly applied to common crossing wire engineering. In the large-span engineering, the gap type self-damping wire has large construction difficulty and cannot guarantee construction safety due to large span.
Disclosure of Invention
The invention aims to solve the technical problems and the technical task of improving the prior art, and provides a gap type self-damping wire large-span overhead line construction method which aims to reduce the construction difficulty of the large-span gap type self-damping wire and improve the construction safety. For this purpose, the present invention adopts the following technical scheme.
A construction method for a gap type self-damping lead wire with a large span wire comprises the following steps:
1) The unmanned aerial vehicle spreads the primary guide rope;
2) The large-scale stretching equipment combines the tension to spread the guide rope, the spreading guide rope starts to spread from the primary guide rope, and the diameter of the guide rope is gradually increased;
3) When the lead is pulled, a large-scale tractor is adopted to pull one lead for lead deployment;
4) When the OPGW is pulled, a large-scale tractor is adopted to pull a wire for OPGW deployment;
5) High-altitude wire tightening and butt-joint full-tension wire hanging;
6) The strain clamp and the traction pipe are hydraulically connected;
7) Installing a crossing tower accessory by utilizing a single-wire lifter double-point lifting method;
8) And installing the conductor spacer by using a spacer installation trolley.
The traction mode of one traction and one wire spreading is adopted, the traction wire connecting walking board is canceled, the maximum use tension born by the traction wire rope is reduced, the traction mode of one traction and two walking board turning over and high wire winding risk is avoided, the probability of occurrence of phase winding or abrasion is reduced to the greatest extent, meanwhile, the paying-off efficiency is improved through the auxiliary traction of the Dinima rope, the construction difficulty of the large-span gap type self-damping wire is reduced, the construction safety is improved, and the construction safety quality of the overhead wire is ensured.
As a preferable technical means: in the step 1), the primary guiding rope is deployed by the unmanned aerial vehicle, and the primary guiding rope is a Dinima rope with phi 3-3.5. The primary guide rope of the Dinima rope with phi of 3-3.5 is light and thin, and the unfolding efficiency of the multi-rotor unmanned aerial vehicle can be effectively improved.
As a preferable technical means: in the step 2), the guide rope adopts Dinima ropes, the diameter specifications of which are increased step by step from the primary guide rope are phi 5, phi 10 and phi 18, then the OPGW is pulled and connected by using a phi 20 anti-torsion wire rope, and when a lead is pulled, the phi 25 anti-torsion wire rope is connected behind the phi 20 anti-torsion wire rope, and then 2 phi 25 anti-torsion wire ropes are connected by using a connecting plate. The expanding diameter is increased step by step, the expanding efficiency is high, proper stretching equipment can be selected, and the energy consumption can be effectively reduced.
As a preferable technical means: all the guide ropes of each stage, the phi 20 anti-torsion wire rope and the OPGW, the connecting plate and the phi 25 anti-torsion wire rope are connected by adopting rotary connectors, and the phi 25 anti-torsion wire rope is connected with a wire traction pipe by adopting rotary connectors. The cable twisting during traction can be effectively released, and torsion can be effectively avoided.
As a preferable technical means: in the steps 2), 3) and 4), a traction field and a tension field are arranged, wherein the traction field adopts 2 large traction machines of 280kN, 1 large traction machines of 2 multiplied by 50kN, 2 medium traction machines of 2 multiplied by 70kN, the tension field adopts 1 large traction machines of 2 multiplied by 140kN, 1 large traction machines of 280kN and 35kN traction machines of 1 medium traction machines of 2 multiplied by 70 kN;
when the phi 18 Dinima rope is unfolded, the phi 18 Dinima rope is connected with a 35KN stretching all-in-one machine of a tension field, the phi 10 Dinima rope is connected with a 2X 50kN stretching all-in-one machine of a traction field, and the phi 10 Dinima rope and the phi 18 Dinima rope are connected by adopting a rotary connector;
when the phi 20 anti-torsion steel wire rope is unfolded, the phi 18 Dinima rope is connected with a 280KN large traction of a tension field, the phi 20 anti-torsion steel wire rope is connected with a 2X 70kN medium tension of a traction field, and the phi 18 Dinima rope and the phi 20 anti-torsion steel wire rope are connected by adopting a rotary connector;
when the OPGW or the phi 25 anti-torsion wire rope is pulled, the OPGW or the phi 25 anti-torsion wire rope is connected with a 2X 70kN middle tension of a tension field, the phi 20 anti-torsion wire rope is connected with a 2X 50kN pulling integrated machine of a pulling field, and the OPGW or the phi 25 anti-torsion wire rope and the phi 20 anti-torsion wire rope are connected by adopting a rotary connector;
when the phi 25 anti-torsion wire ropes are unfolded by utilizing the connecting plates, the phi 25 anti-torsion wire ropes at the traction side are connected with 280KN of a tension field in a large traction way, and the 2 phi 25 anti-torsion wire ropes at the traction side are respectively connected with 2 pieces of 2 multiplied by 70kN of the traction field in a tensioning way;
when the wires are pulled, the wires are connected with 12 multiplied by 140kN large piece of the tension field, each wire is connected with 1 phi 25 anti-torsion wire rope through 1 rotary connector, and each phi 25 anti-torsion wire rope is connected with 1 280kN large piece of the traction field in a pulling way. The traction and deployment of the guide rope, the OPGW and the lead wire of each stage can be effectively realized.
As a preferable technical means: in the step 5), the high-altitude wire tightening and butt-joint method full-tension wire hanging adopts an alloy wire aluminum strand clamping device, a preformed armor rod type steel core wire tightener and a wire tightening pulley block, and the specific operation of wire tightening and wire hanging comprises the following steps:
501 The stress of the wire on the tension field tensioner is kept, the wire is not loosened, and the wire is anchored by the wire clamping device on the cross arm of the iron tower wire;
502 After the wire clamping device is stressed, sequentially cutting off two layers of aluminum alloy wires on the outer layer of the wire from outside to inside, and then gradually stripping the aluminum alloy wires from the aluminum wire cutting point to the mounting position of the wire clamping device layer by layer along the twisting direction until the steel core is exposed;
503 Grease on the surface of the outer layer steel core is removed, a first preformed armor rod type steel core tightener is arranged, and a 1 st set of tightening pulley group is arranged between the tightener and the wire cross arm;
504 Tightening the 1 st set of wire tightening pulley blocks, transferring all tension of the wires to the wire tightening pulley blocks, and after the wires at the rear side of the installation position of the wire tightener are completely unstressed, cutting off the wire steel cores at the rear side of the first set of preformed armor rod tightener, and simultaneously loosening the pulley blocks connected to the wire clamping device to a loose state;
505 Along the broken wire steel core, a strain clamp aluminum pipe is sleeved; a second pre-twisted wire type steel core tightener is arranged on the side, close to the cross arm of the tower body, of the wire steel core, which is sleeved with the tension clamp aluminum pipe, and a 2 nd wire tightening pulley group is arranged between the tightener and the wire cross arm;
506 Tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed; continuously sleeving the strain clamp aluminum pipe until the strain clamp aluminum pipe exceeds an aluminum wire;
507 Tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed;
508 Continuing to sleeve the strain clamp aluminum pipe until the strain clamp aluminum pipe passes over the aluminum wire;
509 Peeling off the aluminum wire on the outer layer of the wire;
510 Reinstallation and tightening of the first set of preformed armor rod tighteners until the second set of preformed armor rod tighteners are unstressed;
511 Removing the second set of preformed armor rod type steel core tightener, completing wire tightening by using the first set of preformed armor rod type steel core tightener which is reloaded, marking the steel core and the aluminum wire after the sag is designed, and keeping a pulley block connected with the wire clamping device in a loose state in the wire tightening process;
512 After finishing the marking, loosening the line tightening pulley group, loosening the red mark position of the steel core to the center of the line gear by 0.4-0.6m, namely, the red mark of the steel core is deviated to the iron tower by 0.4-0.6m to be the broken line position of the steel core, anchoring and standing for at least 20min, and if the aluminum pipe is not crimped in the current day, standing for one night in the loose state of the aluminum line;
513 After the standing is finished, measuring and recording the distance between the steel core red mark and the aluminum wire red mark, keeping the anchoring state of the steel core, and tightening the aluminum wire by using a tightening pulley group arranged on a wire clamping device until the wire is re-tightened to the designed sag, wherein the aluminum wire red mark point is shifted to the tower body side compared with the original position;
514 Cutting off the wire steel core at the position of 0.4-0.6m in the direction of the steel core red-printed offset iron tower, sleeving a strain clamp steel anchor pipe in a penetrating way, and crimping the steel anchor pipe;
515 Using a first set of preformed armor rod tightener to finish the hanging wire of the strain clamp steel anchor pipe and the strain string;
516 The first set of preformed armor rod-type steel core tightener is dismantled, the outer aluminum wire of the lead is recovered, and after the residual wire is cut off, the aluminum pipe crimping of the strain clamp is completed. And the wire tightening and hanging are realized.
As a preferable technical means: in the step 6), when the strain clamp and the traction pipe are hydraulically connected, the hydraulic clamp of the hydraulic machine is used for crimping. The crimping force is large, and the crimping efficiency is high.
As a preferable technical means: in the step 7), a single-wire lifter is respectively arranged in construction holes on the front side and the rear side of the cross arm by using a single-wire lifter double-point lifting method to install the crossing tower accessory, the crossing tower accessory is lifted by using a 100kN chain block, and each sub-wire is lifted by using 2 pairs of single-wire lifters. Can effectively realize the installation of the crossing tower accessories.
As a preferable technical means: in the step 8), when the conductor spacer is installed, an installation trolley is adopted, personnel are led out to install, four nylon wheels are arranged at the upper end of the trolley, the trolley is hung on 2 sub conductors, two traction plates on the trolley are connected with 8 Dinima ropes through V-shaped steel wire sleeves, and the traction plates are led to the ground traction winch through three guide pulleys of a cross arm, a tower body and a tower foot. And (5) finishing the installation of the conductor spacer.
The beneficial effects are that: the traction mode of one traction and one wire spreading is adopted, the traction wire connecting walking board is canceled, the maximum use tension born by the traction wire rope is reduced, the traction mode of one traction and two walking board turning over and high wire winding risk is avoided, the probability of occurrence of phase winding or abrasion is reduced to the greatest extent, meanwhile, the paying-off efficiency is improved through the auxiliary traction of the Dinima rope, the construction difficulty of the large-span gap type self-damping wire is reduced, the construction safety is improved, and the construction safety quality of the overhead wire is ensured.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a schematic diagram of the traction process from the primary lead line to the OPGW in the present invention.
Fig. 3 is a schematic diagram of the present invention from primary lead to lead pulling process.
Fig. 4 is a drawing of the traction apparatus of the present invention for traction and tension fields.
Fig. 5 is a schematic illustration of the yoke plate connection of a phi 25 anti-twist steel wire rope according to the present invention.
Fig. 6 is a schematic diagram of a wire pulling connection in accordance with the present invention.
Fig. 7 is a schematic diagram of a wire tightening and hanging process in the present invention.
Fig. 8 is a schematic diagram of the use of the wire clamp and tightener when tightening Zhang Dace-resistant wires in an example of the invention.
In the figure: 1. phi 25 anti-twist steel wire rope; 2. a yoke plate; 3. rotating the connector; 4. a wire; 5. a traction tube; 6. a wire clamping device; 7. a first set of preformed armor rods type steel core tightener; 8. a second set of preformed armor rods tightener; 9. an aluminum pipe of the strain clamp; 10. a wire cross arm; 11. a steel core; 13. phi 20 anti-twist steel wire rope.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
1-3, a gap type self-damping wire large-span overhead line construction method comprises the following steps:
s1: the unmanned aerial vehicle spreads the primary guide rope;
s2: the large-scale stretching equipment combines the tension to spread the guide rope, the spreading guide rope starts to spread from the primary guide rope, and the diameter of the guide rope is gradually increased;
s3: when the lead 4 is pulled, a large tractor is adopted to pull one lead 4 for the lead 4 to be unfolded;
s4: when the OPGW is pulled, a large-scale tractor is adopted to pull a lead 4 for OPGW deployment;
s5: high-altitude wire tightening and butt-joint full-tension wire hanging;
s6: the strain clamp and the traction pipe 5 are hydraulically connected;
s7: installing a crossing tower accessory by utilizing a single-wire lifter double-point lifting method;
s8: the conductor 4 spacer is installed by means of a spacer installation trolley.
In order to improve the unfolding efficiency, in step S1, the unmanned aerial vehicle is used for unfolding the primary guide rope, and the multi-rotor unmanned aerial vehicle is used for unfolding the primary guide rope, and the primary guide rope is a dinima rope with a diameter of 3.5. The primary guide rope of the Dinima rope with phi of 3.5 is light and thin, and the display efficiency of the multi-rotor unmanned aerial vehicle can be effectively improved.
In order to better improve the unfolding efficiency, in step S2, the guide rope adopts a diminuta rope, the diameter specifications of which are increased step by step from the primary guide rope are Φ5, Φ10 and Φ18, then the diameter specifications are connected by using a Φ20 anti-torsion wire rope 13 when the OPGW is pulled, and when the lead 4 is pulled, the Φ25 anti-torsion wire rope 1 is connected behind the Φ20 anti-torsion wire rope 13, and then the 2 Φ25 anti-torsion wire ropes 1 are connected by using the connecting plate 2. The expanding diameter is increased step by step, the expanding efficiency is high, proper stretching equipment can be selected, and the energy consumption can be effectively reduced.
As shown in fig. 4-6, in order to avoid torsion at the connection part of each level of cable, the guide ropes at each level, the phi 20 anti-torsion wire rope 13 and the OPGW, the yoke plate 2 and the phi 25 anti-torsion wire rope 1 are all connected by adopting a rotary connector 3, and the phi 25 anti-torsion wire rope 1 is connected with the lead 4 traction tube 5 by adopting the rotary connector 3. The cable twisting during traction can be effectively released, and torsion can be effectively avoided.
In the example, in the steps S2, S3 and S4, a traction field and a tension field are arranged, wherein the traction field adopts 2 machines of 280kN large traction, 1 machine of 2 multiplied by 50kN large traction, 2 machines of 2 multiplied by 70kN medium tension, the tension field adopts 1 machine of 2 multiplied by 140kN large traction, 1 machine of 280kN large traction and 1 machine of 2 multiplied by 70kN medium tension and 35kN large traction;
when the phi 18 Dinima rope is unfolded, the phi 18 Dinima rope is connected with a 35KN stretching all-in-one machine of a tension field, the phi 10 Dinima rope is connected with a 2X 50kN stretching all-in-one machine of a traction field, and the phi 10 Dinima rope and the phi 18 Dinima rope are connected by adopting a rotary connector 3;
when the phi 20 anti-torsion wire rope 13 is unfolded, the phi 18 Dinima rope is connected with a 280KN large traction of a tension field, the phi 20 anti-torsion wire rope 13 is connected with a 2X 70kN medium tension of a traction field, and the phi 18 Dinima rope and the phi 20 anti-torsion wire rope 13 are connected by adopting a rotary connector 3;
when the OPGW or the phi 25 anti-torsion wire rope 1 is pulled, the OPGW or the phi 25 anti-torsion wire rope 1 is connected with a 2X 70kN middle tension of a tension field, the phi 20 anti-torsion wire rope 13 is connected with a 2X 50kN pulling and tensioning integrated machine of the pulling field, and the OPGW or the phi 25 anti-torsion wire rope 1 and the phi 20 anti-torsion wire rope 13 are connected by adopting a rotary connector 3;
when the phi 25 anti-torsion steel wire ropes 1 are unfolded by utilizing the connecting plates 2, the phi 25 anti-torsion steel wire ropes 1 on the traction side are connected with 280KN of a tension field in a large traction way, and the 2 phi 25 anti-torsion steel wire ropes 1 on the traction side are respectively connected with 2 pieces of 2 multiplied by 70kN medium tension of the traction field;
when the wires 4 are pulled, the wires 4 are connected with 1 station 2 multiplied by 140kN of a tension field, each wire 4 is connected with 1 phi 25 anti-torsion wire rope 1 through 1 rotary connector 3, and each phi 25 anti-torsion wire rope 1 is connected with 1 station 280kN of the pulling field in a large pulling way. The traction and deployment of the guide rope, the OPGW and the lead 4 at each level can be effectively realized.
As shown in fig. 7 and 8, in step S5, the high-altitude wire tightening and butt-connection method full-tension wire hanging adopts an alloy wire aluminum strand clamping device 6, a preformed armor rod type steel core wire tightener and a wire tightening pulley block, wherein the steel core wire tightener is connected with a wire 4
Taking the operation of tightening and hanging wires near the tension tower as an example, the specific operation comprises the following steps:
s501: the stress of the wire 4 on a tension field tensioner is kept, the wire is not loosened, and the wire 4 is anchored by a wire clamping device 6 at the wire cross arm 10 of the tension tower;
s502: after the wire clamping device 6 is stressed, sequentially cutting off two layers of aluminum alloy wires on the outer layer of the wire 4 from outside to inside in a layering manner, and then gradually stripping the aluminum alloy wires from the aluminum wire cutting point to the mounting position of the wire clamping device 6 layer by layer in the twisting direction until the steel core 11 is exposed;
s503: removing grease on the surface of an outer layer steel core 11, installing a first set of preformed armor rod type steel core tightener 7, and installing a 1 st set of tightening pulley group between the tightener and a wire cross arm 10;
s504: tightening the 1 st set of wire tightening pulley blocks, transferring all tension of the wires 4 to the wire tightening pulley blocks, and after the wires 4 at the rear side of the installation position of the wire tightener are completely unstressed, breaking the wire steel cores 11 at the rear side of the first set of pre-twisted wire type steel core tightener 7, and simultaneously loosening the pulley blocks connected to the wire clamping device 6 to a loose state;
s505: a strain clamp aluminum pipe 9 is sleeved along the broken wire steel core 11; a second preformed armor rod type steel core tightener 8 is arranged on the side, close to the cross arm of the tower body, of a wire steel core 11, which is sleeved with an aluminum pipe 9 of the strain clamp, and a 2 nd tightening pulley group is arranged between the tightener and the wire cross arm 10;
s506: tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed; continuing to sleeve the strain clamp aluminum pipe 9 until exceeding the aluminum wire;
s507: tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed;
s508: continuing to sleeve the strain clamp aluminum pipe 9 until the strain clamp aluminum pipe passes over the aluminum wire;
s509: peeling off the aluminum wire on the outer layer of the lead 4;
s510: reinstalling the first set of preformed armor rod tightener 7 and tightening until the second set of preformed armor rod tightener 8 is not stressed;
s511: dismantling a second set of preformed armor rod tightener 8, completing wire tightening of the lead 4 by using the reloaded first set of preformed armor rod tightener 7, marking the steel core 11 and the aluminum wire after sagging is designed, and keeping a pulley block connected to the wire clamping device 6 in a loose state in the wire tightening process;
s512: after the marking is finished, loosening the line tightening pulley group, loosening the red mark position of the steel core 11 to the center of the line stop by 0.5m, namely, deviating the red mark of the steel core 11 to the tension tower direction by 0.5m to be the line breaking position of the steel core 11, anchoring and standing for at least 20min, and if the aluminum pipe is not crimped in the current day, standing for one night in the aluminum line loosening state;
s513: after the standing is finished, measuring and recording the distance between the red mark of the steel core 11 and the red mark of the aluminum wire, keeping the anchoring state of the steel core 11, and tightening the aluminum wire by utilizing a tightening pulley group arranged on the wire clamping device 6 until the wire 4 is re-tightened to the designed sag, wherein the red mark point of the aluminum wire is moved to the side of the tower body by 0.7m compared with the original position;
s514: cutting off the wire steel core 11 at the position of 0.5m in the direction of the red-printed deflection tension tower of the steel core 11, sleeving a tension clamp steel anchor pipe in a penetrating manner, and crimping the steel anchor pipe;
s515: the first set of preformed armor rod-type steel core tightener 7 is utilized to finish the hanging wire of the steel anchor pipe and the tension string of the tension clamp;
s516: and removing the first set of preformed armor rod tightener 7, recovering the outer aluminum wire of the lead 4, and after the residual wire is cut off, completing crimping of the tension clamp aluminum pipe 9. And the wire tightening and hanging are realized.
In this example, in step S6, when the strain clamp and the traction tube 5 are hydraulically connected, the hydraulic clamp of the 250t hydraulic machine is used for crimping. And (5) finishing crimping.
In order to realize the installation of the crossing tower accessory, in the step S7, the single-wire lifter is installed in the construction holes on the front side and the rear side of the cross arm by using a single-wire lifter double-point lifting method, the single-wire lifters are respectively installed in the construction holes, the single-wire lifters are used for lifting by using 100kN chain blocks, each sub-wire 4 is lifted by using 2 single-wire lifters, and in the example, the single-wire lifters adopt 2 XDG 10 shackle+100 kN chain blocks+phi 24 X1.5 m galvanized pressed steel wire sleeves+80 kN lifting hooks. Can effectively realize the installation of the crossing tower accessories.
In order to complete the installation of the conductor 4 spacer, in step S8, when the conductor 4 spacer is installed, an installation trolley is adopted, personnel are led out to be installed, four nylon wheels are arranged at the upper end of the trolley and are respectively hung on 2 sub conductors 4, two traction plates on the trolley are connected through V-shaped steel wire sleeves, an 8 Dinima rope is led to the ground for traction grinding through three guide pulleys of a cross arm, a tower body and a tower foot. The installation of the conductor 4 spacer is completed.
In this example, each phase conductor 4 is drawn separately.
The traction mode of one traction and one unfolding of the lead 4 is adopted, the traction lead 4 is cancelled to be connected with the walking board, the maximum use tension born by the traction steel wire rope is reduced, the traction mode of one traction and two walking board turning over and high risk of winding the wire is avoided, the probability of occurrence of phase winding or abrasion is reduced to the greatest extent, meanwhile, the paying-off efficiency is improved through the auxiliary traction of the Dinima rope, the construction difficulty of the large-span gap type self-damping lead 4 is reduced, the construction safety is improved, and the construction safety quality of the overhead line is ensured.
The construction method of the gap type self-damping wire large-span overhead line shown in the above figures 1-8 is a specific embodiment of the invention, has shown the outstanding substantial characteristics and remarkable progress of the invention, and can be subjected to equivalent modification in terms of shape, structure and the like according to actual use requirements under the teaching of the invention, and the same is within the scope of protection of the scheme.
Claims (8)
1. A gap type self-damping wire large-span wire construction method is characterized by comprising the following steps:
1) The unmanned aerial vehicle spreads the primary guide rope;
2) The large-scale stretching equipment combines the tension to spread the guide rope, the spreading guide rope starts to spread from the primary guide rope, and the diameter of the guide rope is gradually increased;
3) When the lead (4) is pulled, a large-scale tractor is adopted to pull one lead (4) for the expansion of the lead (4);
4) When the OPGW is pulled, a large-scale tractor is adopted to pull a lead (4) for OPGW deployment;
5) High-altitude wire tightening and butt-joint full-tension wire hanging;
6) The strain clamp and the traction pipe (5) are hydraulically connected;
7) Installing a crossing tower accessory by utilizing a single-wire lifter double-point lifting method;
8) A conductor (4) is arranged on the spacer mounting trolley by utilizing the spacer;
in the steps 2), 3) and 4), a traction field and a tension field are arranged, wherein the traction field adopts 2 large traction machines of 280kN, 1 large traction machines of 2 multiplied by 50kN, 2 medium traction machines of 2 multiplied by 70kN, the tension field adopts 1 large traction machines of 2 multiplied by 140kN, 1 large traction machines of 280kN and 35kN traction machines of 1 medium traction machines of 2 multiplied by 70 kN;
when the phi 18 Dinima rope is unfolded, the phi 18 Dinima rope is connected with a 35KN stretching all-in-one machine of a tension field, the phi 10 Dinima rope is connected with a 2X 50kN stretching all-in-one machine of a traction field, and the phi 10 Dinima rope and the phi 18 Dinima rope are connected by adopting a rotary connector (3);
when the phi 20 anti-torsion steel wire rope (13) is unfolded, the phi 18 Dinima rope is connected with a 280KN large traction of a tension field, the phi 20 anti-torsion steel wire rope (13) is connected with a 2X 70kN middle tension of a traction field, and the phi 18 Dinima rope and the phi 20 anti-torsion steel wire rope (13) are connected by adopting a rotary connector (3);
when the OPGW or the phi 25 anti-torsion wire rope (1) is pulled, the OPGW or the phi 25 anti-torsion wire rope (1) is connected with a 2X 70kN middle tension of a tension field, the phi 20 anti-torsion wire rope (13) is connected with a 2X 50kN pulling and stretching integrated machine of a pulling field, and the OPGW or the phi 25 anti-torsion wire rope (1) is connected with the phi 20 anti-torsion wire rope (13) by adopting a rotary connector (3);
when the phi 25 anti-torsion steel wire ropes (1) are unfolded by utilizing the connecting plates (2), the phi 25 anti-torsion steel wire ropes (1) at the traction side are connected with 280KN of a tension field in a large traction way, and the 2 phi 25 anti-torsion steel wire ropes (1) at the traction side are respectively connected with 2 pieces of 2 multiplied by 70kN medium tension of the traction field;
when the wires (4) are pulled, the wires (4) are connected with 1 station 2 multiplied by 140kN of a tension field in a large way, each wire (4) is connected with 1 phi 25 anti-torsion wire rope (1) through 1 rotary connector (3), and each phi 25 anti-torsion wire rope (1) is connected with 1 station 280kN of the traction field in a large way.
2. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 1), the primary guiding rope is deployed by the unmanned aerial vehicle, and the primary guiding rope is a Dinima rope with phi 3-3.5.
3. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 2), the diameter specification of the guide rope which is gradually increased from the primary guide rope is phi 5, phi 10 and phi 18 by adopting a Dinima rope, then the guide rope is connected by using a phi 20 anti-torsion wire rope (13) when the OPGW is pulled, and when the lead (4) is pulled, the phi 25 anti-torsion wire rope (1) is connected behind the phi 20 anti-torsion wire rope (13), and then the 2 phi 25 anti-torsion wire ropes (1) are connected by using the connecting plate (2).
4. The gap-type self-damping wire large-span overhead line construction method according to claim 3, wherein the method comprises the following steps: all adopt rotary connector (3) to connect between each level guide rope, phi 20 anti-torsion wire rope (13) and OPGW, between yoke plate (2) and phi 25 anti-torsion wire rope (1), phi 25 anti-torsion wire rope (1) adopts rotary connector (3) to be connected with wire (4) traction tube (5).
5. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 5), the high-altitude wire tightening and butt-joint method full-tension wire hanging adopts an alloy wire aluminum strand clamping device (6), a preformed armor rod type steel core wire tightener and a wire tightening pulley block, and the specific operation of wire tightening and wire hanging comprises the following steps:
501 The stress of the wire (4) on the tension field tensioner is kept, the wire is not loosened, and the wire clamping device (6) is used for anchoring the wire (4) on the iron tower wire cross arm (10);
502 After the wire clamping device (6) is stressed, sequentially cutting off two layers of aluminum alloy wires on the outer layer of the wire (4) from outside to inside in layers, and then gradually stripping the aluminum alloy wires from the aluminum wire cutting point to the mounting position of the wire clamping device (6) layer by layer along the twisting direction until the steel core (11) is exposed;
503 Grease on the surface of the outer layer steel core (11) is removed, a first preformed armor rod type steel core tightener (7) is arranged, and a 1 st set of tightening pulley group is arranged between the tightener and the wire cross arm (10);
504 Tightening the 1 st set of wire tightening pulley blocks, transferring all tension of the wires (4) to the wire tightening pulley blocks, and after the wires (4) at the rear side of the installation position of the wire tightener are completely unstressed, breaking the wire steel cores (11) at the rear side of the first set of pre-twisted wire type steel core tightener (7), and simultaneously loosening the pulley blocks connected to the wire clamping device (6) to a loose state;
505 A tension-resistant wire clamp aluminum pipe (9) is sleeved along the broken wire steel core (11); a second preformed armor rod type steel core tightener (8) is arranged on the side, close to the cross arm of the tower body, of a wire steel core (11) sleeved with an aluminum pipe (9) of the strain clamp, and a 2 nd tightening pulley group is arranged between the tightener and the wire cross arm (10);
506 Tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed; continuously sleeving the strain clamp aluminum pipe (9) until the strain clamp aluminum pipe exceeds an aluminum wire;
507 Tightening the 2 nd set of tightening pulley blocks, and dismantling the 1 st set of tightening pulley blocks after the 1 st set of tightening pulley blocks are not stressed;
508 Continuing to sleeve the strain clamp aluminum pipe (9) until the strain clamp aluminum pipe passes through the aluminum wire;
509 Peeling off the aluminum wire on the outer layer of the wire (4);
510 The first set of preformed armor rod type steel core tightener (7) is reinstalled and tightened until the second set of preformed armor rod type steel core tightener (8) is not stressed;
511 The second set of preformed armor rod tightener (8) is dismantled, the first set of preformed armor rod tightener (7) is used for tightening the wires (4), the steel cores (11) and the aluminum wires are marked after the design sag is reached, and a pulley block connected to the wire clamping device (6) is kept in a loose state in the wire tightening process;
512 After finishing the marking, loosening the line tightening pulley group, loosening the red marking position of the steel core (11) to the center of the line stop by 0.4-0.6m, namely, the red marking of the steel core (11) is deviated to the iron tower direction by 0.4-0.6m to be the line breaking position of the steel core (11), anchoring and standing for at least 20min, and if the aluminum pipe is not crimped in the current day, standing for one night in the aluminum line loosening state;
513 After the standing is finished, measuring and recording the distance between the red mark of the steel core (11) and the red mark of the aluminum wire, keeping the anchoring state of the steel core (11), and tightening the aluminum wire by using a tightening pulley group arranged on a wire clamping device (6) until the wire (4) is re-tightened to the designed sag, wherein the red mark point of the aluminum wire is shifted to the tower body side compared with the original position;
514 Cutting off the wire steel core (11) at the position of the steel core (11) with the red mark offset from the iron tower direction by 0.4-0.6m, sleeving a strain clamp steel anchor pipe, and crimping the steel anchor pipe;
515 The first set of preformed armor rod-type steel core tightener (7) is utilized to finish the hanging wire of the strain clamp steel anchor pipe and the strain string;
516 And (3) removing the first preformed armor rod-type steel core tightener (7), recovering the outer aluminum wire of the lead (4), and after the residual wire is cut off, completing the compression joint of the aluminum pipe (9) of the strain clamp.
6. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 6), when the strain clamp and the traction pipe (5) are hydraulically connected, the strain clamp and the traction pipe are in pressure connection by utilizing a hydraulic clamp of a hydraulic machine.
7. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 7), a single-wire lifter is respectively hung in construction holes on the front side and the rear side of the cross arm by using a single-wire lifter double-point lifting method to install the crossing tower accessory, the crossing tower accessory is lifted by using a 100kN chain block, and each sub-wire (4) is lifted by using 2 pairs of single-wire lifters.
8. The gap-type self-damping wire large-span overhead line construction method according to claim 1, wherein the method comprises the following steps: in the step 8), when the conductor (4) spacer is installed, an installation trolley is adopted, personnel are led out to be installed, four nylon wheels are arranged at the upper end of the trolley and are hung on 2 sub-conductors (4), two traction plates on the trolley are connected with an 8 Dinima rope through a V-shaped steel wire sleeve, and the traction plates are led to the ground for traction grinding through a cross arm, a tower body and a tower foot three-position guide pulley.
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| CN202111452555.6A CN114221289B (en) | 2021-12-01 | 2021-12-01 | Construction method for gap type self-damping wire long-span overhead line |
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