CN102354926A - Large-section conductor tension stringing construction method - Google Patents
Large-section conductor tension stringing construction method Download PDFInfo
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- CN102354926A CN102354926A CN2011102648462A CN201110264846A CN102354926A CN 102354926 A CN102354926 A CN 102354926A CN 2011102648462 A CN2011102648462 A CN 2011102648462A CN 201110264846 A CN201110264846 A CN 201110264846A CN 102354926 A CN102354926 A CN 102354926A
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Abstract
The invention discloses a large-section conductor tension stringing construction method, which is characterized by comprising the following steps of: 1, conduction preparation: carrying out a compression joint test on conductors and ground wires, arranging tension fields and pulling fields, and cleaning construction channels; 2, suspension of a tackle; 3, spanning construction; 4, tension payingoff, ground wire and conductor payingoff, and temporary anchors in real time; and 5, compression joint of the conductors, tightening of the conductors, sag observation, and conductor suspension, thus finishing the whole construction. The method is used to ensure that in-phase sub-conductors have same payingoff tensions, thus guaranteeing the stringing construction quality; and by using the method, the construction processes such as the suspension of the payingoff tackle, payingoff of the conductors and pulling ropes, payingoff of the conductors, tightening of the conductors, accessory installation and the like are optimized, thus effectively improving the construction efficiency of the tension payingoff; and the labor power and time wastes are decreased, the fewer devices are used, the floor space is small, and the social economical efficiency is higher.
Description
Technical field
The present invention relates to power transmission and transformation power line construction technology, relate in particular to a kind of large-section lead construction under tension stringing method.
Background technology
800kV extra high voltage direct current transmission line engineering adopts 6 division 900mm
2Large-section lead; Wire type is JL/G3A-900/40; Do not see use at home in the transmission line as yet; Its payingoff construction comprises the projects such as suspension, lead wire and earth wire crimping of the confirming of stringing construction plan, choice of equipment, releasing pulley, does not still have mature experience at home can follow; According to existing extra high voltage line construction technology; Can not guarantee fail safe, the construction quality of work progress, therefore, accomplish 6 division 900mm for guaranteeing both quality and quantity
2Large-section lead stringing construction work needs to propose a kind of new construction method that is suitable for actual engine request.
Summary of the invention
The objective of the invention is to solve the problem that exists in the above-mentioned background technology, propose a kind ofly to be applicable to that its technical scheme of large-section lead construction under tension stringing method is following in the extra high voltage line:
1, a kind of large-section lead construction under tension stringing method is characterized in that may further comprise the steps:
1., preparation of construction: carry out the crimping test of lead, ground wire, and carry out the unwrapping wire section and divide, what tension field and a traction place, cleaning construction passage, the tension force that calculates the tensioner of each unwrapping wire section, hauling machine were set pulls up, disposes messenger;
2., suspension coaster: the ground wire releasing pulley adopts the single pulley suspension; At tangent tower suspension lead releasing pulley; Adopt single releasing pulley; 250kN level seven-wheel line tackle is hung on the six lines yoke plate below construction hole of dangling; At strain tower suspension lead releasing pulley, adopt two releasing pulleys, two coasters adopt channel-section steel to support; Hanger adopts steel wire loop, utilizes the shackle of 200kN level to connect;
3., cross over construction: select to set up the form of construction work of crossing over frame according to the circuit of crossing over, select to set up mao bamboon cross over frame, set up the window formula cross over frame, set up pillar cross over frame or, establish cableway-type and cross over one or more forms of construction work in the frame;
4., tension stringing: adopt the unsettled spreading conducting wire messenger of propeller-parachuting, " one leads one " mode is opened up and is put ground wire, adopts " one leads 6 " exhibition synchronously to put 6 bundle conductors, when carrying out unfolding conductor, keeps sub-conductor tension force to equate, ground wire, lead are put in exhibition, in time face anchor;
5., the crimping lead, carry out stringing, observation sag, hanging wire, accomplish whole construction.
In the preparation of the present invention before construction, take all factors into consideration many-sided factor, rationally divide the unwrapping wire section; Tension field and traction field are set, and, obtain opening of each unwrapping wire section and pull up through calculating; For configuration tensioner, hauling machine and messenger provide theoretical foundation, guarantee construction quality; Adopt " one leads 6 " exhibition to put scheme; Promptly utilize a hauling machine; Cooperate with three two stretching machines; Cooperate unwrapping wire with " one leads 6 " limp and seven-wheel line tackle; It has following advantage: (1) can guarantee that each sub-conductor of homophase has identical laying tension; The lead sag of having avoided causing owing to the Tension Difference between the homophase sub-conductor is inconsistent, thereby guarantees the stringing construction quality; (2) optimize construction technologies such as releasing pulley suspension, lead messenger and pull rope exhibition are put, unfolding conductor, stringing, annex installation, effectively improved the tension stringing efficiency of construction; (3) need number of devices few, floor space is little, has higher social economy's property.
The present invention has satisfied the requirement of standardized construction fully, can be used for instructing 6 division 900mm
2The standardized construction of large-section lead ultra-high voltage transformer station overhead wire; For the construction of ultra high voltage experiment and demonstration engineering safety, raising work efficiency, realization environmental objective provide technical support, also for using lead construction of the same type to have great reference value and directive significance in domestic other ultra high voltage project from now on.
Description of drawings
Fig. 1 is the overall construction flow chart of the present invention;
Fig. 2 draws a floor plan sketch map for the present invention;
Fig. 3 is a tension field floor plan sketch map of the present invention;
Fig. 4 is a unfolding conductor sequential schematic of the present invention;
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further detailed description.
Consult shown in Figure 1ly, large-section lead construction under tension stringing method may further comprise the steps:
1., preparation of construction: carry out the crimping test of lead, ground wire, and carry out the unwrapping wire section and divide, what tension field and traction, cleaning construction passage, the tension force that calculates the tensioner of each unwrapping wire section, hauling machine were set pulls up, disposes messenger;
2., suspension coaster: the ground wire releasing pulley adopts the single pulley suspension; At tangent tower suspension lead releasing pulley; Adopt single releasing pulley; 250kN level seven-wheel line tackle is hung on the six lines yoke plate below construction hole of dangling; At strain tower suspension lead releasing pulley, adopt two releasing pulleys, two coasters adopt channel-section steel to support; Hanger adopts steel wire loop, utilizes the shackle of 200kN level to connect;
3., cross over construction: select to set up the form of construction work of crossing over frame according to the circuit of crossing over, select to set up mao bamboon cross over frame, set up the window formula cross over frame, set up pillar cross over frame or, establish cableway-type and cross over one or more forms of construction work in the frame;
4., tension stringing: adopt the unsettled spreading conducting wire messenger of propeller-parachuting, " one leads one " mode is opened up and is put ground wire, adopts " one leads 6 " exhibition synchronously to put 6 bundle conductors, when carrying out unfolding conductor, keeps sub-conductor tension force to equate, ground wire, lead are put in exhibition, in time face anchor;
5., the crimping lead, carry out stringing, observation sag, hanging wire, accomplish whole construction.
Specific embodiment
Test with large-section lead tension stringing in the ± 800kV extra high voltage direct current transmission line illustrates concrete technical scheme of the present invention.
1, before the construction
Quantity according to the line construction bid section; Path; The quantity of iron tower; The distance of crossing over; The type of lead and parameter; Select the specifications and models and the pull rope of lead wire and earth wire; The specification and the parameter of guiding rope; Calculate the anti-parameter of turning round steel wire rope of all size that unwrapping wire uses; Select the model and the quantity of " one leads 6 " stringing construction capital equipment and Work tool; And scheme is put in the exhibition of choosing " leads 6 "; Promptly utilize a hauling machine; Cooperate with three two stretching machines; Cooperate unwrapping wire with " one leads 6 " limp and seven-wheel line tackle; Take all factors into consideration many-sided factor; Rationally divide the unwrapping wire section; The place of tension field and traction field is set; And through calculating; Obtain opening of each unwrapping wire section and pull up, be the configuration tensioner; Hauling machine and messenger provide theoretical foundation.According to result of calculation, the single line of main tensioner outlet tension force is 22～30kN, and the tractive effort of main hauling machine is 180～220kN.Confirm that thus pull rope is the anti-steel wire rope of turning round of square limit diameter 30mm, selecting square diameter is that the anti-steel wire rope of turning round of 20mm, 15mm is as the guiding rope.
2, the suspension of releasing pulley
1., ground wire releasing pulley hang
The ground wire releasing pulley all adopts single pulley, and tangent tower ground wire coaster all directly is connected with ground wire gold utensil U-16S with the 50kN shackle.Strain tower ground wire coaster all directly is connected with ground wire gold utensil UL-2115S with the 50kN shackle.
2., lead coaster suspension
Before preparation of construction, calculate lead to the envelope angle of coaster, the vertical load that coaster bears.Through test method, confirm that straight line splicing sleeve protective sleeve is crossed releasing pulley after, whether the aluminium hydraulic pressed connecting pipe buckling phenomenon appears.When vertical load surpasses the maximum rated work load of coaster; Load when splicing sleeve and splicing sleeve protective sleeve are crossed coaster surpasses it and allows load (definite through testing), in the time of possibly causing splicing sleeve crooked; After laying tension is normal, when the envelope angle of lead on releasing pulley surpasses 30 °; If satisfy among the above-mentioned three arbitrarily one, answer the suspended double coaster.
3., tangent tower releasing pulley hang: tangent tower suspension seven-wheel line tackle, utilize P-64320S that 250kN level seven-wheel line tackle is hung on the six lines construction hole, yoke plate below of dangling.
4., strain tower releasing pulley hang
Strain tower suspended double releasing pulley, two coasters adopt 160 * 16 * 3.5m channel-section steel to support, and it is the steel wire loop of 3m for 28mm length that hanger adopts diameter phi, utilize rated load to carry out the centre for the shackle of 200kN level and connect.
Utilize 60kN level Lever Blocks that the coaster pre-tilt is adjusted in real time in the unwrapping wire process, guarantee that all kinds of ropes do not job-hop.
3, arrange the field that pulls up, arrange tension field
According to traction field floor plan sketch map as shown in Figure 2, arrange the field that pulls up; Tension field floor plan sketch map according to is as shown in Figure 3 arranged tension field;
4, tension stringing
1., ground wire exhibition puts order: φ 3.5 high-strength caprone cables (the propeller-parachuting exhibition is put)-φ 8 enlightening Nimas rope (artificial transition)-φ 16 high-strength caprone cables (the machinery exhibition is put)-15 anti-steel wire rope (the machinery exhibition is put)-LBGJ-180 ground wires of turning round,
2., unfolding conductor order: the high-strength caprone cable of diameter phi 3.5mm (the propeller-parachuting exhibition the is put)-high-strength caprone cable of diameter phi 8mm enlightening Nima rope (artificial transition)-diameter phi 16mm (the machinery exhibition is put)-square linear diameter be 15mm anti-turn round steel wire rope (the machinery exhibition is put)-square linear diameter be 20mm anti-to turn round steel wire rope (the machinery exhibition is put)-square linear diameter be that 30mm anti-turned round steel wire rope-" one leads 6 " exhibition synchronously and put 6 division JL/G3A-900/40 leads, the unfolding conductor order is as shown in Figure 4.
3., cross over construction
According to several modes below the parameter of crossing over thing in the construction line:
35KV is with line and highway, railway, adopts to set up mao bamboon and cross over frame;
Cross over 35KV with line and highway, railway; Also can adopt and set up window formula leap frame; It is in light weight that this crosses over frame; Volume is little; Easy for installation, upwards the assembly unit group is upright piecewise can to carry out the high-altitude by 2 skilled workers, except that adopting a lifting rope manpower to lift the standard film; Without any need for aid, fail safe is better.
35kV～200kV power circuit and the electric railway leap that do not have a power failure; Set up pillar and cross over frame (dividing four posts, every phase four posts, 3 kinds of forms of every phase twin columns); But this type is crossed over frame and is adopted the steel construction column; The monomer deadweight is bigger; Using for transportation makes troubles, and particularly the area inconvenience of having inconvenient traffic is used in the mountain area etc.;
Set up cableway-type and cross over frame, the horizontal crossbeam of tying up fixedly holds the rete cord road, holds rete cord road, lapping on old lead, utilizes massif ground fixedly to hold 4 kinds of forms such as rete cord road with the body of the tower body-fixed on the branch tower;
Cross over the following power circuit of 35kV, can pass through the cable transition.
4., the exhibition of guiding rope is put
1., adopt the unsettled spreading guiding rope mode of propeller-parachuting.Exhibition for the elementary messenger of lead is put; Take " one leads 1 "; Mode is put in exhibition according to 1 high-strength caprone cable of φ 3.5mm of φ 8mm enlightening Nima rope band, is that the joint of the high-strength caprone cable of 3.5mm and Di Nima that diameter phi is 8mm rope is hung a lead and used diameter phi to be the high-strength caprone cable of 3.5mm in diameter phi promptly; After 30kN bending resistance connector passes through the ground wire coaster; Stop traction; The work high above the ground personnel cooperate; One people unties the circulator at fag end rear; Utilize length to use diameter phi to transit to the lead releasing pulley in lead for the high-strength caprone cable of 3.5mm as the high-strength caprone cable of 3.5mm for 20m～30m, diameter phi; Again be connected with circulator, complete operation continues traction.The chain type limp all repeats this operation during through every basic iron tower.
5., the ground wire exhibition is put
" one the leads one " mode of employing tension stringing, select medium-sized tension force car and medium-sized tractor, the rope connected mode: square diameter is that steel wire rope+rated load of 15mm is circulator+single head traction net+ground wire LBGJ-180 of 50kN.Answer slow traction when the beginning is decontroled in ground wire exhibition, treat that whole trailer system operation is normal after, can draw at full speed, its speed control is divided the branch to 80m/ at 40m/.
6., unfolding conductor
Adopt " one leads 6 " spreading conducting wire synchronously, select technical merit skilled operating personnel higher, that be familiar with the unwrapping wire program to carry out the control of tensioner, guarantee 6 root lead speed synchronization, tension force equates.The connected mode of rope: square diameter is that to turn round rotary connector+250kN that steel wire rope+rated load is 280kN " leads 6 " limp+130kN rotary connector+square diameter be that 20mm, length are that to turn round steel wire loop+rated load be that circulator+rated load of 80kN is single head traction net+JL/G3A-900/40 lead of 50kN for 3m anti-for 30mm anti-.
7., laying tension choosing and controlling
Satisfy coefficient of safety, the rope of guiding rope, pull rope and other connector quilt is crossed over the safe clear distance of thing, and the bearing capacity of leading, opening equipment.During spreading conducting wire, the maximum of solid conductor outlet tension force should not surpass 30kN, and total tension force of separate unit tensioner is between 2 * (22～30)=44～60kN; Lead the about 180～220kN of tractive effort of machine.
8., limp control
When carrying out unfolding conductor, keep sub-conductor tension force to equate, guarantee that limp do not overturn.Limp should be advanced at a slow speed when the coaster, when through strain tower, should make limp inclined through the tension force of adjustment sub-conductor, approximately is parallel to the releasing pulley axle, is convenient to limp and passes through smoothly.
9., the anchor that faces in the journey is let slip in exhibition
Lead, ground wire exhibition are put and are finished, and should in time perform and face anchor work, and face anchor tension force: it is 35kN that the JL/G3A-900/40 lead faces anchor tension force, and it is 20kN that ground wire LBGJ-180 faces anchor tension force.Lead is not less than 5 meters apart from ground level after facing anchor.Eight root leads are staggered, to prevent mutual whiplash damage wires.
5, crimping lead carries out stringing, observation sag, anchor
Different with the ordinary steel core aluminum stranded wire, for the JL/G3A-900/40 large-section lead, operate according to " large-section lead hydraulic pressure technology guide rule " (Q/GDW 571-2010), the mode that the strain insulator pipe takes aluminum pipe to fall to press, splicing sleeve takes aluminum pipe along the mode of pressing.
Lead wire and earth wire aluminium hydraulic pressed connecting pipe punching block specification and crimping size satisfy relational expression:
S＝0.866×(0.993×D)+0.2mm
Wherein: S is for pressing the maximum opposite side distance that allows in back, and D is aluminium hydraulic pressed connecting pipe external diameter (mm).
Three opposite side distance only allow one and reach maximum, should change punching block weight when surpassing this regulation.Splicing sleeve, repair sleeve and strain clamp are circular, are hexagon after the pressure.
The aluminum pipe drainage plate is installed, and the strain clamp drainage plate pastes with the light face of wire jumper drainage plate mutually during installation.
The content that this specification is not done to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (10)
1. large-section lead construction under tension stringing method is characterized in that may further comprise the steps:
1., preparation of construction: carry out the crimping test of lead, ground wire, and carry out the unwrapping wire section and divide, tension field and a traction place, cleaning construction passage, the tension force that calculates the tensioner of each unwrapping wire section, the tractive effort of hauling machine, configuration messenger are set;
2., suspension coaster: the ground wire releasing pulley adopts the single pulley suspension; At tangent tower suspension lead releasing pulley; Adopt single releasing pulley; 250kN level seven-wheel line tackle is hung on the six lines yoke plate below construction hole of dangling; At strain tower suspension lead releasing pulley, adopt two releasing pulleys, two coasters adopt channel-section steel to support; Hanger adopts steel wire loop, utilizes the shackle of 200kN level to connect;
3., cross over construction: select to set up the form of construction work of crossing over frame according to the circuit of crossing over, select to set up mao bamboon and cross over frame, set up the window formula and cross over frame, set up pillar and cross over frame or set up cableway-type and cross over one or more forms of construction work in the frame;
4., tension stringing: adopt the unsettled exhibition of propeller-parachuting to put the lead wire and earth wire messenger, " one leads one " mode is opened up and is put ground wire, adopts " one leads 6 " exhibition synchronously to put 6 bundle conductors, when carrying out unfolding conductor, keeps sub-conductor tension force to equate, ground wire, lead are put in exhibition, in time face anchor;
5., the crimping lead, carry out stringing, observation sag, anchor, hanging wire, accomplish whole construction.
2. large-section lead construction under tension stringing method according to claim 1; It is characterized in that; Step 1. in, also comprise and calculate anti-model and the quantity of turning round parameter, selection " leads 6 " stringing construction capital equipment and the Work tool of steel wire rope of all size that unwrapping wire uses.
3. large-section lead construction under tension stringing method according to claim 1 and 2; It is characterized in that; Step 2. in; When the ground wire releasing pulley is suspended on tangent tower; The ground wire coaster adopts the 50kN shackle directly to be connected with the ground wire gold utensil, and the ground wire releasing pulley is suspended on strain tower ground wire coaster and adopts the 50kN shackle directly to be connected with the ground wire gold utensil.
4. large-section lead construction under tension stringing method according to claim 3 is characterized in that, step 3. in, when crossing over 35kV, set up mao bamboon and cross over frame or set up the window formula and cross over frame with line and highway, railway; Do not have a power failure when crossing in 35kV～220kV power circuit and electric railway, set up cable-styled leap frame; Cross over the following power circuit of 35kV, adopt the cable transition.
5. large-section lead construction under tension stringing method according to claim 4; It is characterized in that; Step 4. in; The exhibition of lead messenger is put concrete grammar and is; The elementary messenger of lead takes " one leads 1 " exhibition to put mode; It promptly is the joint of the high-strength caprone cable of 3.5mm and the Di Nima rope that diameter phi is 8mm in diameter phi; Connecing a diameter phi is the high-strength caprone cable of 3.5mm; After the bending resistance connector of 30kN passes through the ground wire coaster; Stop traction; Utilize that 20m～30m is long, diameter phi is the high-strength caprone cable of 3.5mm, is that the high-strength caprone cable of 3.5mm transits to the lead releasing pulley with the lead diameter phi.
6. large-section lead construction under tension stringing method according to claim 4; It is characterized in that; Step 4. in; The concrete grammar that ground wire is put in exhibition is to adopt " one leads one " mode tension stringing; Select medium-sized tension force car and medium-sized tractor for use; It is that the steel wire rope of 15mm, the connector that rated load is 50kN, circulator and the exhibition of single head traction net that rated load is 50kN are put ground wire that rope connect to adopt square diameter, and the speed that exhibition is put is that speed control is divided the branch to 80m/ at 40m/.
7. large-section lead construction under tension stringing method according to claim 4; It is characterized in that; Step 4. in; The unfolding conductor concrete grammar is; Adopt " one leads 6 " spreading conducting wire synchronously; 6 root wire tensions are equated; Payingoff speed is synchronous; The order of connection that rope in the journey is let slip in exhibition; Connecting square diameter is the anti-steel wire rope of turning round of 30mm, and connects the rotary connector that rated load is 280kN then, and connecting rated load is " one leads 6 " limp of 250kN; It is that the circulator of 80kN draws net, spreading conducting wire with the single head that rated load is 50kN that rated load is installed.
8. large-section lead construction under tension stringing method according to claim 4 is characterized in that, step 4. in; During spreading conducting wire; The maximum outlet tension force of solid conductor is less than or equal to 30kN, and total tension force of separate unit tension force car is at 44～60kN, and the tractive effort that leads car is 180～220kN.
9. large-section lead construction under tension stringing method according to claim 4 is characterized in that, step 4. in, it is 35kN that lead faces anchor tension force, it is 20kN that ground wire faces anchor tension force, face behind the anchor lead apart from ground level more than or equal to 5 meters.
10. large-section lead construction under tension stringing method according to claim 1; It is characterized in that; In the crimping lead process of step in 5.; The lead wire and earth wire relation between maximum opposite side distance S of permission in back and the aluminium hydraulic pressed connecting pipe D outer diameter of pressing satisfies following formula: S=0.866 * (0.993 * D)+0.2, the unit of S and D is mm.
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