CN110714579A - Prestressed tendon extension anchoring structure - Google Patents
Prestressed tendon extension anchoring structure Download PDFInfo
- Publication number
- CN110714579A CN110714579A CN201810758038.3A CN201810758038A CN110714579A CN 110714579 A CN110714579 A CN 110714579A CN 201810758038 A CN201810758038 A CN 201810758038A CN 110714579 A CN110714579 A CN 110714579A
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- Prior art keywords
- extrusion
- sleeve
- prestressed
- tendon
- anchoring structure
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- 210000002435 tendon Anatomy 0.000 title claims abstract description 87
- 238000004873 anchoring Methods 0.000 title claims abstract description 48
- 238000001125 extrusion Methods 0.000 claims abstract description 90
- 230000004323 axial length Effects 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/163—Connectors or means for connecting parts for reinforcements the reinforcements running in one single direction
- E04C5/165—Coaxial connection by means of sleeves
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention provides a prestressed tendon lengthening and anchoring structure which comprises two prestressed tendon extrusion and anchoring units which are mutually butted, wherein each prestressed tendon extrusion and anchoring unit respectively comprises an extrusion sleeve positioned at one butted end and a prestressed tendon extruded and penetrated in the extrusion sleeve, each extrusion sleeve is respectively provided with an external thread, and the prestressed tendon lengthening and anchoring structure also comprises a connecting screw sleeve which is simultaneously screwed outside the two extrusion sleeves so as to anchor the two prestressed tendons together. The prestressed tendons are used for extruding the extrusion sleeve in the anchoring unit, the extrusion sleeve is provided with threads, the extrusion sleeve is correspondingly provided with a connecting threaded sleeve, and the two prestressed tendons are anchored together in a threaded connection mode. Compared with the mode of adopting the clamping piece type connector to lengthen the prestressed tendons in the prior art, the method reduces the number of parts, simplifies the connection mode and reduces the complexity of the prestressed tendon lengthening and anchoring structure.
Description
Technical Field
The invention relates to a prestressed tendon lengthening and anchoring structure.
Background
Among the prior art, because the restriction of prestressing tendons self length or the requirement of section stretch-draw prestressing tendons when being under construction, need dock two prestressing tendons, dock between two prestressing tendons among the prior art and adopt the clip formula structure more, as the utility model patent that the grant bulletin number is CN205134756U shows, this utility model discloses a steel strand wires connector, including the anchor ring of two butt joints, be equipped with the bell mouth in the anchor ring, be provided with the extrusion anchor in the bell mouth of anchor ring, be provided with spring and anti-skidding cusp strip in the extrusion anchor, the outside of extrusion anchor is the toper. During specific butt joint, the two prestressed tendons are respectively inserted into the corresponding extrusion anchors, the prestressed tendons are compacted through the conical wedge principle of the extrusion anchors, then the two anchor rings and the prestressed tendons are fixed on the steel sleeve, and the butt joint and the extension of the two prestressed tendons are realized through the steel sleeve.
The prestressed tendon extrusion anchoring unit in the prior art has a structure shown in fig. 1, and the prestressed tendon extrusion anchoring unit 1 includes a prestressed tendon 11, an extrusion sleeve 12 sleeved at one end of the prestressed tendon 11, and an extrusion anchoring friction sleeve (or an extrusion spring) located between the prestressed tendon 11 and the extrusion sleeve 12, wherein during anchoring, the extrusion anchoring friction sleeve (or the extrusion spring) and the extrusion sleeve 12 are sequentially sleeved outside one end of the prestressed tendon 11, so that the extrusion anchoring friction sleeve and the extrusion sleeve 12 forcibly pass through a die hole smaller than the outer diameter of the extrusion sleeve under the action of axial thrust, the extrusion sleeve is extruded and contracted, and during the contraction and deformation of the extrusion sleeve, the extrusion anchoring friction sleeve (or the extrusion spring) is extruded into a small irregular multi-edge and multi-tip shape, and is simultaneously embedded into the extrusion sleeve and the prestressed tendon under the action of extrusion force, so as to realize permanent connection.
In the steel strand connector, in order to realize the butt joint of the two prestressed tendons, an extrusion anchor, an anchor ring and a steel sleeve are required to be sequentially arranged outside the prestressed tendons, so that the structure of the steel strand connector is complex.
Disclosure of Invention
The invention aims to provide a prestressed tendon lengthening and anchoring structure, which aims to solve the technical problem of complicated structure caused by adopting a clamping piece type connector to lengthen a prestressed tendon in the technology.
In order to achieve the purpose, the technical scheme of the prestressed tendon lengthening and anchoring structure is as follows: the utility model provides a prestressing tendons anchor structure that lengthens, includes two prestressing tendons extrusion anchor units that dock each other, and each prestressing tendons extrusion anchor unit is equipped with the external screw thread respectively including the extrusion cover that is located butt joint one end and the prestressing tendons of dress in the extrusion cover is worn in the extrusion to the extrusion respectively, and prestressing tendons anchor structure that lengthens still includes that the screw thread is adorned soon in two extrusion cover outsidess in order to anchor two prestressing tendons connection swivel nut together simultaneously.
The invention has the beneficial effects that: the invention provides a prestressed tendon lengthening and anchoring structure which comprises two prestressed tendon extrusion and anchoring units, wherein the two prestressed tendon extrusion and anchoring units comprise extrusion sleeves and internal prestressed tendons, external threads are arranged on the outer portions of the extrusion sleeves, the prestressed tendon lengthening and anchoring structure also comprises connecting screw sleeves which are sleeved on the outer portions of the two extrusion sleeves. Compared with the mode of adopting the clamping piece type connector to lengthen the prestressed tendons in the prior art, the method reduces the number of parts, simplifies the connection mode and reduces the complexity of the prestressed tendon lengthening and anchoring structure.
The external threads outside the two extrusion sleeves are opposite in rotation direction, and correspondingly, the connecting threaded sleeve is provided with two internal thread sections with different rotation directions.
The axial length of the connecting screw sleeve is greater than the sum of the axial lengths of the two extrusion sleeves.
The external thread is arranged on the outer whole body of the extrusion sleeve.
And a plurality of layers of prestressed tendons are uniformly distributed in each extrusion sleeve along the radial direction, and the prestressed tendons of each layer except the middle layer are uniformly distributed at intervals along the circumferential direction.
The connecting screw sleeve comprises two parts which rotate relatively in the circumferential direction and are fixed relatively in the axial direction, and internal threads matched with the external threads of the corresponding extrusion sleeve are arranged on each part.
Drawings
FIG. 1 is a schematic view of a tendon extrusion anchoring unit in the prior art;
fig. 2 is a sectional view of an embodiment 1 of the tendon extension anchoring structure of the present invention;
FIG. 3 is a left side view of FIG. 2;
fig. 4 is a schematic view of a tendon extrusion anchoring unit in embodiment 2 of the tendon extension anchoring structure of the present invention;
fig. 5 is a sectional view of an embodiment 2 of the tendon extension anchoring structure of the present invention;
fig. 6 is a left side view of fig. 5.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 2 to 3, the tendon lengthening and anchoring structure of embodiment 1 of the present invention includes two tendon extrusion anchoring units 1 that are butted with each other, each tendon extrusion anchoring unit 1 includes an extrusion sleeve 12 and a tendon 11 that is extruded and penetrated in the extrusion sleeve 12, wherein an assembly manner between the extrusion sleeve 12 and the tendon 11 is the content of the prior art, and details will not be described in this embodiment.
In order to anchor the two prestressed tendons together, external threads are all opened in the outside of two extrusion covers 12, and the external thread on one of them extrusion cover 12 is the levogyration external thread, and the external thread on another extrusion cover 12 is the dextrorotation external thread, and in this embodiment, the outside entire body of extrusion cover 12 is provided with the external thread. The external portion of one end of two prestressing tendons extrusion anchor unit 1 butt joints is provided with connects swivel nut 2, connects swivel nut 2 both ends opening, connects and is provided with the internal thread in the swivel nut 2, and connects swivel nut 2 internal thread including controlling two parts, the rotation of two parts is opposite. During assembly, the extrusion sleeve 12 with the left-handed external thread is threaded in the left-handed thread of the connecting screw sleeve 2, and the extrusion sleeve 12 with the right-handed external thread is threaded in the right-handed thread of the connecting screw sleeve 2. So that the two prestressed tendon extrusion anchoring units 1 are anchored in the connecting threaded sleeve 2, and the lengthening anchoring of the two prestressed tendons is realized.
Because the screw thread turning directions of the extrusion sleeves in the two prestressed tendon extrusion anchoring units 1 are opposite, when the device is used, the two prestressed tendon extrusion anchoring units 1 can be driven to move relatively by rotating the connecting screw sleeve 2, the distance between the two prestressed tendon extrusion anchoring units 1 is adjusted, and in addition, the pretension force can be applied to the two prestressed tendons by rotating the connecting screw sleeve 2.
Of course, in other embodiments, the thread directions of the two extrusion sleeves may be designed to be the same only for lengthening the two tendons, and correspondingly, the thread directions of the internal threads of the connecting screw sleeve are also completely the same.
In the embodiment, as can be seen from the figure, the axial length of the connecting screw sleeve is greater than the sum of the axial lengths of the two extrusion sleeves, so that the two extrusion sleeves can completely extend into the connecting screw sleeve, and the length adjusting range is enlarged.
In other embodiments, threads having an axial length less than the axial length of the extrusion jacket may be provided only on the exterior of the extrusion jacket.
As shown in fig. 4 to 6, in the embodiment of the tendon elongation anchoring structure 2 of the present invention, the tendon extrusion anchoring unit 1 includes an extrusion sleeve 12 and a plurality of tendons 11 extruded and inserted into the extrusion sleeve 12, the tendons 11 are uniformly distributed in a plurality of layers at intervals along a radial direction, and the tendons 11 are uniformly distributed in each layer except for the middle layer at intervals along a circumferential direction.
The specific embodiment 3 of the tendon lengthening and anchoring structure of the present invention is different from the above embodiments in that the connection threaded sleeve is an integral structure, in this embodiment, the connection threaded sleeve is designed into two parts which are relatively rotated in the circumferential direction and relatively fixed in the axial direction, the two parts are both provided with internal threads, and the internal threads of the two parts can be screwed into the corresponding extrusion sleeve threads. In this embodiment, through will connecting the screw sleeve and designing into two parts, can realize the independent screw in of two extrusion covers, it is more convenient.
In the above embodiment, the portion of the connecting nut provided with the internal thread is an internal thread section.
Claims (6)
1. The utility model provides a prestressing tendons extension anchor structure which characterized in that: the prestressed tendon extension anchoring structure comprises two prestressed tendon extrusion anchoring units which are mutually butted, wherein each prestressed tendon extrusion anchoring unit comprises an extrusion sleeve positioned at one end of the butt joint and a prestressed tendon which is extruded and penetrated in the extrusion sleeve, each extrusion sleeve is provided with an external thread, and the prestressed tendon extension anchoring structure further comprises a connecting threaded sleeve which is screwed outside the two extrusion sleeves to anchor the two prestressed tendons together.
2. The tendon extension anchoring structure of claim 1, wherein: the external threads outside the two extrusion sleeves are opposite in rotation direction, and correspondingly, the connecting threaded sleeve is provided with two internal thread sections with different rotation directions.
3. The tendon extension anchoring structure of claim 1 or 2, wherein: the axial length of the connecting screw sleeve is greater than the sum of the axial lengths of the two extrusion sleeves.
4. The tendon extension anchoring structure of claim 3, wherein: the external thread is arranged on the outer whole body of the extrusion sleeve.
5. The tendon extension anchoring structure of claim 1 or 2, wherein: and a plurality of layers of prestressed tendons are uniformly distributed in each extrusion sleeve along the radial direction, and the prestressed tendons of each layer except the middle layer are uniformly distributed at intervals along the circumferential direction.
6. The tendon extension anchoring structure of claim 1 or 2, wherein: the connecting screw sleeve comprises two parts which rotate relatively in the circumferential direction and are fixed relatively in the axial direction, and internal threads matched with the external threads of the corresponding extrusion sleeve are arranged on each part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810758038.3A CN110714579A (en) | 2018-07-11 | 2018-07-11 | Prestressed tendon extension anchoring structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810758038.3A CN110714579A (en) | 2018-07-11 | 2018-07-11 | Prestressed tendon extension anchoring structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110714579A true CN110714579A (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810758038.3A Pending CN110714579A (en) | 2018-07-11 | 2018-07-11 | Prestressed tendon extension anchoring structure |
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| CN (1) | CN110714579A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834731A1 (en) * | 1988-10-12 | 1990-04-19 | Dyckerhoff & Widmann Ag | Device for anchoring or connecting concrete reinforcement bars and process for producing the same |
| CN2550440Y (en) * | 2002-07-05 | 2003-05-14 | 耿书岭 | Contrapetal prestress rib connector |
| US20060201083A1 (en) * | 2005-03-11 | 2006-09-14 | Hayes Speciality Machining, Ltd | Tensioning anchor suitable for blind-hole tendon anchoring and tendon repair |
| CN201267944Y (en) * | 2008-08-11 | 2009-07-08 | 河南红桥锚机有限公司 | Piece-clamping clamper of piece-clamping saw parting device and piece-clamping clamper rotor block |
| CN201991142U (en) * | 2010-10-27 | 2011-09-28 | 管乃彦 | Composite sleeve type rebar connecting device |
| CN203066358U (en) * | 2012-12-18 | 2013-07-17 | 中国建筑第七工程局有限公司 | Rapid connector for reinforcing steel bar |
| CN103850397A (en) * | 2014-03-04 | 2014-06-11 | 昆山盛夏复合材料科技有限公司 | Spiral tendon connector |
| CN104358359A (en) * | 2014-10-14 | 2015-02-18 | 周兆弟 | Concave-convex steel bar joint |
| CN204626791U (en) * | 2015-05-08 | 2015-09-09 | 内蒙古蒙西工程设计有限公司 | A kind of straight thread reinforced bar live-knot connecting device |
| CN206512932U (en) * | 2017-02-28 | 2017-09-22 | 中国建筑第八工程局有限公司 | Free-standing reinforced bar sleeve |
| CN208604835U (en) * | 2018-07-11 | 2019-03-15 | 河南红桥锚机有限公司 | Presstressed reinforcing steel spreading anchor structure |
-
2018
- 2018-07-11 CN CN201810758038.3A patent/CN110714579A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3834731A1 (en) * | 1988-10-12 | 1990-04-19 | Dyckerhoff & Widmann Ag | Device for anchoring or connecting concrete reinforcement bars and process for producing the same |
| CN2550440Y (en) * | 2002-07-05 | 2003-05-14 | 耿书岭 | Contrapetal prestress rib connector |
| US20060201083A1 (en) * | 2005-03-11 | 2006-09-14 | Hayes Speciality Machining, Ltd | Tensioning anchor suitable for blind-hole tendon anchoring and tendon repair |
| CN201267944Y (en) * | 2008-08-11 | 2009-07-08 | 河南红桥锚机有限公司 | Piece-clamping clamper of piece-clamping saw parting device and piece-clamping clamper rotor block |
| CN201991142U (en) * | 2010-10-27 | 2011-09-28 | 管乃彦 | Composite sleeve type rebar connecting device |
| CN203066358U (en) * | 2012-12-18 | 2013-07-17 | 中国建筑第七工程局有限公司 | Rapid connector for reinforcing steel bar |
| CN103850397A (en) * | 2014-03-04 | 2014-06-11 | 昆山盛夏复合材料科技有限公司 | Spiral tendon connector |
| CN104358359A (en) * | 2014-10-14 | 2015-02-18 | 周兆弟 | Concave-convex steel bar joint |
| CN204626791U (en) * | 2015-05-08 | 2015-09-09 | 内蒙古蒙西工程设计有限公司 | A kind of straight thread reinforced bar live-knot connecting device |
| CN206512932U (en) * | 2017-02-28 | 2017-09-22 | 中国建筑第八工程局有限公司 | Free-standing reinforced bar sleeve |
| CN208604835U (en) * | 2018-07-11 | 2019-03-15 | 河南红桥锚机有限公司 | Presstressed reinforcing steel spreading anchor structure |
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