CN105064214A - Stay cable tension device for eliminating back-twist - Google Patents
Stay cable tension device for eliminating back-twist Download PDFInfo
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- CN105064214A CN105064214A CN201510436449.7A CN201510436449A CN105064214A CN 105064214 A CN105064214 A CN 105064214A CN 201510436449 A CN201510436449 A CN 201510436449A CN 105064214 A CN105064214 A CN 105064214A
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- anchor
- moveable anchor
- steel strand
- moveable
- roller bearing
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Abstract
The invention discloses a stay cable tension device for eliminating back-twist. The device comprises a stay cable anchor cup, a connector, a nut, a traction steel strand, a tension supporting lug, a thrust roller bearing, a first tool anchor, a first tool anchor limiting component, a tool anchor supporting lug, a hydraulic jack, a second tool anchor and a second tool anchor limiting component, wherein the stay cable anchor cup is connected with the traction steel strand through the connector, the stay cable anchor cup is connected with the tension supporting lug through the nut, the thrust roller bearing is arranged behind the tension supporting lug, the first tool anchor is arranged on the thrust roller bearing, the first tool anchor is connected with the tool anchor supporting lug, the tool anchor supporting lug is connected with the hydraulic jack, and the hydraulic jack is connected with the second tool anchor. According to the invention, the problem of twisting of steel strands caused by back-twist of a large-size ultra-long stay cable in traction and tension processes of the steel strands is solved; and the thrust roller bearing structure is creatively adopted, and the thrust roller bearing is arranged on the tension supporting lug.
Description
Technical field
The invention belongs to bridge building operations technical field, especially relate to a kind of inclined guy cable stretching device eliminating back twist.
Background technology
For large span stayed-cable bridge, suspension cable specification is large, strand is long, needs to adopt the some steel strand be parallel to each other, and by two cover moveable anchor alternating actions, suspension cable is drawn to design attitude.Because suspension cable steel wire is through left-handed 3 ° of twistings, be subject to axial tension effect, cable body can rotate along axis to clockwise direction, produces back twist.When suspension cable is installed, cable body back twist can cause the traction steel strand be parallel to each other to twist, and then strand is beaten in generation, so just changing the stress of steel strand, producing certain shearing force, along with the further increase of suspension cable windup-degree at the steel strand of ground tackle joint because beating strand, shearing force is also tending towards increasing, very easily cause steel strand to cut off, cause weight, extraordinarily serious safety accident, badly influence the safety of suspension cable installation exercise.
Summary of the invention
The object of this invention is to provide a kind of inclined guy cable stretching method and apparatus eliminating back twist, solve in the traction of prior art large gauge super long stayed cable steel strand and stretching process, strand problem is beaten in the steel strand generation caused because of cable body back twist, thus avoid the generation of steel strand fracture accident, ensure that cable stayed bridge safety.
The technical solution used in the present invention is:
Eliminate an inclined guy cable stretching device for back twist, comprise suspension cable anchor cup, connector, nut, traction steel strand, stretch-draw spike, thrust roller bearing, the first moveable anchor, the first moveable anchor limit assembly, moveable anchor spike, hydraulic jack, the second moveable anchor and the second moveable anchor limit assembly; Described suspension cable anchor cup is connected with traction steel strand by connector, suspension cable anchor cup is connected by nut with stretch-draw spike, thrust roller bearing is provided with at the rear of stretch-draw spike, thrust roller bearing is provided with the first moveable anchor, first moveable anchor fastening means anchor spike, moveable anchor spike connects hydraulic jack, and hydraulic jack connects the second moveable anchor.
Further, the first described moveable anchor and the second moveable anchor rear are respectively equipped with the first moveable anchor limit assembly and the second moveable anchor limit assembly.
Further, described traction steel strand adopt the standard steel section twisted wire of seven steel wire twistings, nominal diameter to be 15.2mm.Further, described connector is provided with the through hole that several diameters are 18mm, and traction steel strand are connected with suspension cable anchor head by the through hole on connector.
The beneficial effect that the present invention produces is: beat strand problem to solve the steel strand generation caused because of cable body back twist in the traction of large gauge super long stayed cable steel strand and stretching process, the present invention creatively have employed thrust roller bearing structure, is located at by thrust roller bearing on stretch-draw spike.In steel strand distraction procedure, when cable body is along the generation back twist of cable body axis, pass through thrust roller bearing, drive moveable anchor synchronous axial system, effectively eliminate the phenomenon causing the twisting of traction steel strand because of cable body back twist, thus evaded the accident generation that in distraction procedure, steel strand are cut off, not only ensure that the construction safety that suspension cable is installed, and raising slope, speed up the work.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, eliminate an inclined guy cable stretching device for back twist, this device comprises suspension cable anchor cup 1, connector 2, nut 3, traction steel strand 4, stretch-draw spike 5, thrust roller bearing 6, first moveable anchor 7, first moveable anchor limit assembly 8, moveable anchor spike 9, hydraulic jack 10, second moveable anchor 11 and the second moveable anchor limit assembly 12.
Be below a kind of embodiment of the present invention:
By suspension cable handling to beam face, traction steel strand 4 are connected with suspension cable anchor cup 1 by connector 2, traction steel strand 4 adopt the nominal diameter of seven steel wire twistings to be the standard steel section twisted wire of 15.2mm, and the traction radical of steel strand 4 and the size of connector 2 and technical condition etc. need technician to design as the case may be.At suspension cable anchor cup rear, stretch-draw spike 5, nut 3 and thrust roller bearing 6 are installed successively, after traction steel strand 4 pull out and meet active length, first moveable anchor 7, hydraulic jack 10 and the second moveable anchor 11 and are installed successively, wherein, moveable anchor is made up of tool clamping piece, instrument anchor ring and limit assembly, for clamping also anchoring steel strand.Adjust the first moveable anchor limit assembly 8 and the second moveable anchor limit assembly 12 to appropriate location, meet the spacing requirement of tool clamping piece.
When starting to draw stretch-draw, use oil pump to make the oil-feed of hydraulic jack 10 tension cylinder, the second moveable anchor 11 clamps traction steel strand 4 and stretches, and now the intermediate plate of the first moveable anchor 7 is in releasing orientation, does not contact with steel strand.When hydraulic jack 10 arrives range demands, stop tension cylinder oil-feed, regulate the first moveable anchor limit assembly 8, intermediate plate be pressed into the taper hole of the first moveable anchor 7 and clamp steel strand, check errorless after, the oil return of hydraulic jack 10 stretch-draw oil cylinder, tension cylinder backhaul, now the first moveable anchor 7 clamps steel strand, and the second moveable anchor 11 is in releasing orientation.After tension cylinder puts in place, regulate the second moveable anchor 11 to clamp steel strand, repeat above-mentioned tension operation, and so forth, by the intermittent action of the first moveable anchor 7 and the second moveable anchor 11, realize the towage of traction steel strand 4.
In distraction procedure, if suspension cable generation back twist, cable body rotates to clockwise direction, be there is rotating Vortex by suspension cable anchor cup 1 in drive traction steel strand 4, now under the effect of thrust roller bearing 6, the first moveable anchor 7, first moveable anchor limit assembly 8, moveable anchor spike 9, hydraulic jack 10, second moveable anchor 11 and the second moveable anchor limit assembly 12 are also towards clockwise direction integral-rotation.This process if desired, can complete above-mentioned rotation adjustment by machine tool and manpower augmented thrust roller bearing 6, ensure that the entirety of steel strand within the scope of whole active length is straight, thus evade the generation that strand phenomenon beaten by steel strand.
When inclined guy cable stretching is to design attitude, hydraulic jack 10 holds lotus, is screwed by nut 3.Regulate the first moveable anchor limit assembly 8 and the second moveable anchor limit assembly 12, the first moveable anchor 7 and the second moveable anchor 11 is made all to be in releasing orientation, check errorless after, the oil return of hydraulic jack 10 stretch-draw oil cylinder, after jack backhaul puts in place, remove the second moveable anchor limit assembly 12, second moveable anchor 11, hydraulic jack 10, moveable anchor spike 9, first moveable anchor limit assembly 8, first moveable anchor 7, thrust roller bearing 6 and stretch-draw spike 5 successively.
The distinguishing feature eliminating the inclined guy cable stretching method of back twist in the present embodiment is: traction steel strand are in straight state all the time in the overall process of inclined guy cable stretching, thus effectively evaded steel strand cause cut-out phenomenon because mutually beating strand, ensure that the construction safety in suspension cable installation process.
Be noted that, above-described embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, other amendment that those of ordinary skill in the art make technical scheme of the present invention or equivalently to replace, only otherwise depart from the spirit and scope of technical solution of the present invention, all should be encompassed in the middle of right of the present invention.
Claims (4)
1. eliminate an inclined guy cable stretching device for back twist, comprise suspension cable anchor cup, connector, nut, traction steel strand, stretch-draw spike, thrust roller bearing, the first moveable anchor, the first moveable anchor limit assembly, moveable anchor spike, hydraulic jack, the second moveable anchor and the second moveable anchor limit assembly; Described suspension cable anchor cup is connected with traction steel strand by connector, suspension cable anchor cup is connected by nut with stretch-draw spike, it is characterized in that: be provided with thrust roller bearing at the rear of stretch-draw spike, thrust roller bearing is provided with the first moveable anchor, first moveable anchor fastening means anchor spike, moveable anchor spike connects hydraulic jack, and hydraulic jack connects the second moveable anchor.
2. a kind of inclined guy cable stretching device eliminating back twist according to claim 1, is characterized in that: the first moveable anchor and the second moveable anchor rear are respectively equipped with the first moveable anchor limit assembly and the second moveable anchor limit assembly.
3. a kind of inclined guy cable stretching device eliminating back twist according to claim 1, is characterized in that: described traction steel strand adopt the standard steel section twisted wire of seven steel wire twistings, nominal diameter 15.2mm.
4. a kind of inclined guy cable stretching device eliminating back twist according to claim 1, is characterized in that: described connector is provided with the through hole that several diameters are 18mm, and traction steel strand are connected with suspension cable anchor head by the through hole on connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510436449.7A CN105064214B (en) | 2015-07-23 | 2015-07-23 | A kind of inclined guy cable stretching device eliminating back twist |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510436449.7A CN105064214B (en) | 2015-07-23 | 2015-07-23 | A kind of inclined guy cable stretching device eliminating back twist |
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| Publication Number | Publication Date |
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| CN105064214A true CN105064214A (en) | 2015-11-18 |
| CN105064214B CN105064214B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510436449.7A Active CN105064214B (en) | 2015-07-23 | 2015-07-23 | A kind of inclined guy cable stretching device eliminating back twist |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714682A (en) * | 2016-02-19 | 2016-06-29 | 四川公路桥梁建设集团有限公司 | Operation system for tensioning stay cables in small space bridge tower |
| CN110468711A (en) * | 2019-07-16 | 2019-11-19 | 武汉希萌科技有限公司 | A kind of tool anchor device of adjustable hole location |
| CN112240002A (en) * | 2019-07-17 | 2021-01-19 | 天津联东兴达科技有限公司 | Full-automatic hydraulic steel strand tractor |
| CN113756441A (en) * | 2020-06-05 | 2021-12-07 | 中国二十冶集团有限公司 | Large-span net rack anchor head inhaul cable and arc-shaped net rack tensioning method |
Citations (5)
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| DE2935419A1 (en) * | 1979-09-01 | 1981-03-19 | Lutz Dr.-Ing. 7250 Leonberg Franke | Prestressed concrete composite fibre stress bar end anchor - has stop limiting inside clamps axial movement beyond that producing friction pressure |
| CN1424465A (en) * | 2003-01-08 | 2003-06-18 | 柳州市威尔姆预应力有限公司 | Low stressed self anchoring method for group anchor steel tension cables |
| CN101725113A (en) * | 2009-12-08 | 2010-06-09 | 中铁大桥(郑州)缆索有限公司 | Two arm-brace stretching method of arc bridge tie bar cable |
| CN103696371A (en) * | 2013-12-25 | 2014-04-02 | 中铁大桥局集团第四工程有限公司 | Stretching device and stretching method for slings of self-anchorage suspension bridges |
| CN204982669U (en) * | 2015-07-23 | 2016-01-20 | 中铁大桥(郑州)缆索有限公司 | Suspension cable tensioning equipment of turning round is moved back in elimination |
-
2015
- 2015-07-23 CN CN201510436449.7A patent/CN105064214B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2935419A1 (en) * | 1979-09-01 | 1981-03-19 | Lutz Dr.-Ing. 7250 Leonberg Franke | Prestressed concrete composite fibre stress bar end anchor - has stop limiting inside clamps axial movement beyond that producing friction pressure |
| CN1424465A (en) * | 2003-01-08 | 2003-06-18 | 柳州市威尔姆预应力有限公司 | Low stressed self anchoring method for group anchor steel tension cables |
| CN101725113A (en) * | 2009-12-08 | 2010-06-09 | 中铁大桥(郑州)缆索有限公司 | Two arm-brace stretching method of arc bridge tie bar cable |
| CN103696371A (en) * | 2013-12-25 | 2014-04-02 | 中铁大桥局集团第四工程有限公司 | Stretching device and stretching method for slings of self-anchorage suspension bridges |
| CN204982669U (en) * | 2015-07-23 | 2016-01-20 | 中铁大桥(郑州)缆索有限公司 | Suspension cable tensioning equipment of turning round is moved back in elimination |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105714682A (en) * | 2016-02-19 | 2016-06-29 | 四川公路桥梁建设集团有限公司 | Operation system for tensioning stay cables in small space bridge tower |
| CN110468711A (en) * | 2019-07-16 | 2019-11-19 | 武汉希萌科技有限公司 | A kind of tool anchor device of adjustable hole location |
| CN112240002A (en) * | 2019-07-17 | 2021-01-19 | 天津联东兴达科技有限公司 | Full-automatic hydraulic steel strand tractor |
| CN113756441A (en) * | 2020-06-05 | 2021-12-07 | 中国二十冶集团有限公司 | Large-span net rack anchor head inhaul cable and arc-shaped net rack tensioning method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105064214B (en) | 2016-08-24 |
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