CN113235453B - High-efficiency prestressed steel strand traction head - Google Patents
High-efficiency prestressed steel strand traction head Download PDFInfo
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- CN113235453B CN113235453B CN202110671164.7A CN202110671164A CN113235453B CN 113235453 B CN113235453 B CN 113235453B CN 202110671164 A CN202110671164 A CN 202110671164A CN 113235453 B CN113235453 B CN 113235453B
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- column
- bearing sleeve
- steel strand
- bearing
- inner rod
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention provides a high-efficiency prestressed steel strand traction head, which comprises: the traction head is used for being connected with the traction steel wire; the steel strands are arranged in multiple groups and are connected to the outer wall of the traction head along the length direction of the traction head; wherein, the number of each group of steel strands is single or many. Compared with the prior art, the steel strands are connected to the traction head in groups, the shape of the cross section of the joint of the traction head and the steel strands is changed, and compared with the prior art that the joints of a plurality of steel strands are located in the same cross section, the deformation of a prestressed pipeline is improved, the traction head cannot smoothly pass through the deformed prestressed pipeline, and the construction efficiency and the construction progress are greatly improved.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a high-efficiency prestressed steel strand bundle traction head.
Background
In the traditional process of penetrating the prestressed steel strand bundle, the self-made steel strand bundle traction head or the finished product tractor is in a shaped state, and the common manufacturing method is that a fixed number of steel strands are welded on the periphery of a traction tie bar in a surrounding mode, then the fixed number of steel strands are welded on the periphery of the welded steel strands again, and the traction head is manufactured after enough number of steel strands are welded repeatedly; the traction head is in a columnar pyramid shape, and the steel strand is driven to penetrate through the prestress hole by applying force to the traction lacing wire.
In the post-tensioned prestressed bridge concrete pouring process, the condition (such as an oval shape) that a prestressed pipeline deforms can be met inevitably, the conventional shaping traction head (column) cannot smoothly pass through the deformed prestressed pipeline, the beam body needs to be windowed, the solid quality of the bridge is influenced, the construction efficiency is reduced, and the construction progress can also be greatly influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the high-efficiency prestressed steel strand bundle traction head to improve the construction efficiency and increase the construction progress.
The invention provides a high-efficiency prestressed steel strand bundle traction head, which comprises:
the traction head is used for being connected with the traction steel wire;
the steel strands are arranged in multiple groups and are connected to the outer wall of the traction head along the length direction of the traction head;
wherein, the number of each group of steel strands is single or many.
Compared with the prior art, the invention has the following beneficial effects:
in the technology of the invention, the material is,
the steel strands are connected to the traction head in a grouping mode, the shape of the cross section of the joint of the traction head and the steel strands is changed, and compared with the prior art that the joints of the steel strands are located in the same cross section, deformation of the prestressed pipeline is improved, the traction head cannot smoothly pass through the deformed prestressed pipeline, and construction efficiency and construction progress are greatly improved.
Preferably, the traction head comprises a bearing mechanism and an adjusting mechanism;
each adjusting mechanism corresponds to one steel strand;
the adjusting mechanism comprises a telescopic component and a sliding block which is slidably arranged on the telescopic component; the sliding block is connected with the steel strand;
the bearing mechanism is used for adjusting the orientation of the telescopic member;
when the prestressed hole walls on the two sides of the horizontal direction of the bearing mechanism protrude inwards, the sliding block slides to the upper part or the lower part of the bearing mechanism along the telescopic component; when the upper part of the bearing mechanism collapses, the sliding blocks slide to two sides of the horizontal direction of the bearing mechanism along the telescopic components.
Preferably, the bearing mechanism comprises a bearing sleeve, an inner rod, a power component and an anti-rotation component;
the bearing sleeve is provided with a plurality of placing holes communicated with the inside and the outside; the inner rod is in sliding fit in the bearing sleeve along the axial direction of the bearing sleeve; one end of the telescopic member is hinged with the inner wall of the containing hole, and the other end of the telescopic member is hinged with the outer wall of the inner rod; the power component is arranged in the bearing sleeve and connected with one end of the inner rod; the power component is used for driving the inner rod to slide along the axial direction of the inner rod; the anti-rotation component is connected with the lower end of the bearing sleeve and used for limiting the bearing sleeve to slide along the axial direction of the bearing sleeve.
Preferably, the telescopic member comprises a first column hinged with the inner wall of the mounting hole and a second column hinged with the inner rod;
the end surface of the first column is connected with a plurality of clamping columns which are distributed circumferentially; a positioning sleeve coaxial with the first column is connected among the clamping columns of the first column; the end surface of the second column is connected with a plurality of clamping columns which are distributed circumferentially; positioning rods coaxial with the second column are connected among the clamping columns of the second column; the positioning rod of the second column is in sliding fit with the positioning sleeve of the first column; the clamping columns of the first column and the clamping columns of the second column are mutually staggered and matched.
Preferably, the rotation-preventing member includes a guide rail; a sliding groove is formed below the bearing sleeve; the guide rail is in sliding fit with the sliding groove.
Preferably, the power member comprises a hydraulic cylinder; the hydraulic cylinder is arranged in the bearing sleeve; and a mandril of the hydraulic cylinder is connected with one end of the inner rod.
Preferably, the outer wall of the bearing sleeve is connected with a plurality of anti-touch strips; and the hole opening of each placing hole is provided with the anti-touch strip.
Preferably, one end of the bearing sleeve is a closed ball end.
Drawings
FIG. 1 is a schematic structural diagram of a high-efficiency prestressed steel strand drawing head according to an embodiment of the present invention;
fig. 2 is a front view of the high-efficiency prestressed steel strand pulling head of fig. 1;
FIG. 3 is a side view (in cross-section) of the high efficiency prestressed steel strand pulling head of FIG. 1;
fig. 4 is a schematic structural view of a telescopic member of the high-efficiency prestressed steel strand traction head of fig. 1;
fig. 5 is a schematic structural view of a first column and a second column of the high-efficiency prestressed steel strand traction head of fig. 1.
The reference numbers indicate:
1. a traction head; 11. a carrying mechanism; 111. a load bearing sleeve; 112. an inner rod; 113. a power member; 114. an anti-rotation member; 115. placing the hole; 116. a touch bar; 12. an adjustment mechanism; 121. a telescoping member; 121a, a first column; 121b, a second column; 121c, a positioning sleeve; 121d, a positioning rod; 122. a slider;
2. and (4) steel strands.
Detailed Description
In order to make the objects, technical solutions and beneficial effects of the present invention more clearly apparent, the technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 5, an efficient prestressed steel strand traction head comprises:
the traction head 1 is used for being connected with a traction steel wire;
the steel strands 2 are arranged in multiple groups, and the multiple groups of steel strands 2 are connected to the outer wall of the traction head 1 along the length direction of the traction head;
wherein, the number of each group of steel strands 2 is single or multiple.
Known, connect 2 quantity of steel strand wires on first 1 of pulling invariable, and the cross section of the totality of the steel strand wires 2 of the same quantity is the same, traditional first 1 of pulling is encircleed the welding in first 1 periphery with steel strand wires 2 of fixed quantity with steel strand wires 2, then weld the steel strand wires 2 of fixed quantity again in the steel strand wires 2 periphery that have welded, accomplish the preparation after the sufficient steel strand wires 2 of quantity are welded many times in the circulation, all solder joints all are located same cross section, the cross section of first 1 of pulling promptly, make first 1 of pulling excessively regular, and the cross section can't change, and the prestressing force hole that warp is anomalous collapse, regular first 1 of pulling can't pass.
By adopting the manufacturing method, the steel strands 2 are connected with the traction head 1 in groups along the length direction of the traction head 1, the cross section shapes of the steel strands 2 except the connection position with the traction head 1 cannot be changed, and the rest positions of the steel strands 2 can freely swing, so that the cross section shapes of the connection positions of the steel strands 2 and the traction head 1 in the next group can be changed (the cross section overall shapes of the traction head 1 and the steel strands 2); the variable cross section shape of the steel strand 2 and the traction head 1 enables the steel strand to smoothly pass through the deformed prestressed hole, so that the construction efficiency and the progress are greatly improved.
Furthermore, the traction head 1 comprises a carrier mechanism 11 and an adjustment mechanism 12. Each adjusting mechanism 12 corresponds to one steel strand 2.
The adjusting mechanism 12 comprises a telescopic member 121 and a sliding block 122 slidably mounted on the telescopic member 121; the slider 122 is connected to the steel strand 2.
The bearing mechanism 11 is used to adjust the orientation of the telescopic member 121. When the prestressed hole walls on both sides of the bearing mechanism 11 in the horizontal direction protrude inward, the sliding block 122 slides along the telescopic member 121 to the upper or lower side of the bearing mechanism 11; when the bearing mechanism 11 collapses upward, the slide blocks 122 slide along the telescopic members 121 to both sides of the bearing mechanism 11 in the horizontal direction.
One end of the telescopic member 121 is fixed on the bearing mechanism 11 and is marked as a fixed end; the other end moves relative to the fixed end under the driving of the bearing mechanism 11, and is called as a moving end. The carrying mechanism 11 is used for carrying the telescopic member 121, and simultaneously, the moving end of the telescopic member 121 is adjusted, so that the orientation of the telescopic member 121 is changed. The moving end of the telescopic member 121 is marked as a positive state when facing the direction in which the traction head 1 travels, and is marked as a negative state when the moving end is not facing the direction in which the traction head 1 travels.
State 1: when the prestressed hole walls on both sides of the horizontal direction of the support mechanism 11 protrude inward, the telescopic member 121 is in a forward state, which is shown in fig. 2; the steel strand 2 rubs against the protruding prestressed hole wall, and further drives the sliding block 122 connected with the steel strand to slide to the upper and lower sides of the bearing mechanism 11 along the telescopic member 121.
State 2: when the upper part of the carrying mechanism 11 collapses, the carrying mechanism 11 adjusts the telescopic member 121 to be in a reverse state, and the steel strand 2 rubs against the upper prestressed hole wall, driving the sliding block 122 connected with the steel strand to slide to the left and right sides of the carrying mechanism 11.
The deformation of the prestressed holes is mainly the deformation of the top and both sides.
Furthermore, the bearing mechanism 11 comprises a bearing sleeve 111, an inner rod 112, a power member 113 and an anti-rotation member 114;
the bearing sleeve 111 is provided with a plurality of placing holes 115 communicated with the inside and the outside; the inner rod 112 is axially and slidably fitted in the bearing sleeve 111 along the bearing sleeve 111; one end of the telescopic member 121 is hinged with the inner wall of the placing hole 115, and the other end of the telescopic member 121 is hinged with the outer wall of the inner rod 112; the power member 113 is installed in the bearing sleeve 111 and connected with one end of the inner rod 112; the power member 113 is used for driving the inner rod 112 to slide along the axial direction thereof; an anti-rotation member 114 is connected to the lower end of the carrier sleeve 111 and serves to restrict the carrier sleeve 111 from sliding axially therealong.
When the power member 113 drives the inner rod 112 to slide, one end of the telescopic member 121 hinged to the inner rod 112 is driven, the hinged end of the telescopic member 121 and the inner rod 112 is a movable end, and the hinged end of the telescopic member 121 and the inner wall of the placement hole 115 is a fixed end; the moving end of the telescopic member 121 is moved by the inner rod 112 relative to the fixed end thereof, so that the orientation of the telescopic member 121 is changed, and the sliding direction of the sliding block 122 is changed.
Further, the telescopic member 121 includes a first column 121a hinged to an inner wall of the seating hole 115 and a second column 121b hinged to the inner rod 112;
the end surface of the first column 121a is connected with a plurality of clamping columns which are distributed circumferentially; a positioning sleeve 121c coaxial with the first column 121a is connected between the plurality of clamping columns of the first column 121 a; the end surface of the second column 121b is connected with a plurality of circumferentially distributed snap columns; positioning rods 121d coaxial with the second column 121b are connected among the plurality of clamping columns of the second column 121 b; the positioning rod 121d of the second column 121b is in sliding fit with the positioning sleeve 121c of the first column 121 a; the engaging posts of the first posts 121a and the engaging posts of the second posts 121b are engaged with each other in a staggered manner.
The sliding block 122 needs to slide on the telescopic member 121, i.e. the telescopic member 121 not only needs to satisfy the requirement of telescopic movement, but also needs to enable the sliding block 122 to slide smoothly thereon. After the engaging posts of the first post 121a and the second post 121b are engaged with each other, a post with a smooth surface is formed to meet the requirement of the upper sliding block 122.
Further, the rotation preventing member 114 includes a guide rail; a chute is arranged below the bearing sleeve 111; the guide rail is in sliding fit with the sliding groove.
The guide rail is laid in the prestressed hole in advance, and the bearing sleeve 111 is arranged on the guide rail when the steel strand 2 is pulled; it may also be shaped, such as a dovetail block; so that the sleeve can not be separated from the guide rail, and the anti-rotation capability of the sleeve is stronger.
Further, the power member 113 includes a hydraulic cylinder; the hydraulic cylinder is arranged in the bearing sleeve 111; the ram of the hydraulic cylinder is connected to one end of an inner rod 112.
The hydraulic cylinder is used for driving the square rod to slide; the hydraulic cylinder shown in fig. 2 is arranged at the front part of the traction head 1, and when the hydraulic cylinder mandril is retracted, the telescopic member 121 is in a positive state; when the cylinder rams are extended, the telescopic member 121 is in a reverse state.
Further, a plurality of anti-touch bars 116 are connected to the outer wall of the bearing sleeve 111; the opening of each placing hole 115 is provided with a contact strip 116.
The steel strand 2 is connected with the sliding block 122 and then covers the placement hole 115 at the rear end, and in order to prevent the steel strand 2 from pressing the sliding block 122 in the placement hole 115 to reduce the sliding effect, the contact bar 116 supports the steel strand 2 so that the steel strand 2 does not contact the sliding block 122 in the placement hole 115.
Furthermore, one end of the bearing sleeve 111 is a closed ball end. The ball end of the bearing sleeve 111 is easier to advance in the pre-stressed hole.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (5)
1. The utility model provides a high-efficient prestressing force steel strand wires restraints pull head which characterized in that includes:
the steel strands are arranged in multiple groups and are connected to the outer wall of the traction head along the length direction of the traction head;
wherein, the number of each group of steel strands is single or multiple;
the traction head is used for being connected with a traction steel wire and comprises a bearing mechanism and an adjusting mechanism;
each adjusting mechanism corresponds to one steel strand;
the adjusting mechanism comprises a telescopic component and a sliding block which is slidably arranged on the telescopic component; the sliding block is connected with the steel strand;
the bearing mechanism is used for adjusting the orientation of the telescopic member;
when the prestressed hole walls on the two sides of the horizontal direction of the bearing mechanism protrude inwards, the sliding block slides to the upper part or the lower part of the bearing mechanism along the telescopic component; when the upper part of the bearing mechanism collapses, the sliding blocks slide to two sides of the bearing mechanism in the horizontal direction along the telescopic component;
the bearing mechanism comprises a bearing sleeve, an inner rod, a power component and an anti-rotation component;
the bearing sleeve is provided with a plurality of placing holes communicated with the inside and the outside; the inner rod is axially and slidably matched in the bearing sleeve along the bearing sleeve; one end of the telescopic member is hinged with the inner wall of the containing hole, and the other end of the telescopic member is hinged with the outer wall of the inner rod; the power component is arranged in the bearing sleeve and connected with one end of the inner rod; the power component is used for driving the inner rod to slide along the axial direction of the inner rod; the anti-rotation component is connected with the lower end of the bearing sleeve and is used for limiting the bearing sleeve to slide along the axial direction of the bearing sleeve;
the telescopic component comprises a first column hinged with the inner wall of the mounting hole and a second column hinged with the inner rod;
the end face of the first column is connected with a plurality of clamping columns which are distributed circumferentially; a positioning sleeve coaxial with the first column is connected among the clamping columns of the first column; the end surface of the second column is connected with a plurality of clamping columns which are distributed circumferentially; positioning rods coaxial with the second column are connected among the clamping columns of the second column; the positioning rod of the second column is in sliding fit with the positioning sleeve of the first column; the clamping columns of the first column and the clamping columns of the second column are mutually staggered and matched.
2. The high-efficiency prestressed steel strand pulling head as set forth in claim 1, wherein said rotation-preventing member comprises a guide rail; a sliding groove is formed below the bearing sleeve; the guide rail is in sliding fit with the sliding groove.
3. The high-efficiency prestressed steel strand pulling head as set forth in claim 2, wherein said power member comprises a hydraulic cylinder; the hydraulic cylinder is arranged in the bearing sleeve; and a mandril of the hydraulic cylinder is connected with one end of the inner rod.
4. The high-efficiency prestressed steel strand pulling head as set forth in claim 3, wherein a plurality of anti-touch bars are connected to the outer wall of said bearing sleeve; and the opening of each placement hole is provided with the anti-touch strip.
5. The high-efficiency prestressed steel strand pulling head as set forth in claim 4, wherein one end of the bearing sleeve is a closed ball end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671164.7A CN113235453B (en) | 2021-06-17 | 2021-06-17 | High-efficiency prestressed steel strand traction head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110671164.7A CN113235453B (en) | 2021-06-17 | 2021-06-17 | High-efficiency prestressed steel strand traction head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113235453A CN113235453A (en) | 2021-08-10 |
| CN113235453B true CN113235453B (en) | 2022-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110671164.7A Active CN113235453B (en) | 2021-06-17 | 2021-06-17 | High-efficiency prestressed steel strand traction head |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452323B (en) * | 2013-09-18 | 2016-08-17 | 天津鑫坤泰预应力专业技术有限公司 | A kind of core rod puller of finished steel strand bundle |
| CN205636518U (en) * | 2016-03-10 | 2016-10-12 | 中铁六局集团有限公司 | Instrument is worn to restraint by prestress wire |
| CN206189281U (en) * | 2016-11-17 | 2017-05-24 | 中交路桥华东工程有限公司 | Cast -in -place beam pre -stressed reinforcement draw gear |
| CN106436585B (en) * | 2016-12-02 | 2018-03-20 | 中交第二航务工程勘察设计院有限公司 | A kind of prestress wire lashing fixture and operating method |
| CN108104479B (en) * | 2018-01-24 | 2023-07-18 | 柳州欧维姆机械股份有限公司 | Integral prestress steel strand traction device and construction method for integral traction of prestress steel strand |
| CN207919904U (en) * | 2018-02-07 | 2018-09-28 | 中亿丰建设集团股份有限公司 | A kind of integrally dragging fixture |
| CN209292898U (en) * | 2018-11-28 | 2019-08-23 | 中铁十七局集团第一工程有限公司 | Steel strand wires auxiliary traction head |
| CN109868816A (en) * | 2019-01-25 | 2019-06-11 | 中国水利水电科学研究院 | Stress and the adjustable non-bonding prestress tendon Inner bolt head of deformation |
| CN109930837A (en) * | 2019-03-28 | 2019-06-25 | 重庆市隆泰稀土新材料有限责任公司 | A kind of drafting tool for steel strand wires |
| KR102255412B1 (en) * | 2019-04-25 | 2021-05-24 | 다올이앤씨 주식회사 | Device for cabel installation and method for cable installation using the same |
| CN210712573U (en) * | 2019-08-27 | 2020-06-09 | 中交路桥华南工程有限公司 | Steel strand traction system |
| CN211646008U (en) * | 2019-11-22 | 2020-10-09 | 开封市长城预应力有限责任公司 | Steel strand tractor convenient to installation |
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2021
- 2021-06-17 CN CN202110671164.7A patent/CN113235453B/en active Active
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