CN202164744U - Anchorage device clamp piece with high anchoring efficiency - Google Patents
Anchorage device clamp piece with high anchoring efficiency Download PDFInfo
- Publication number
- CN202164744U CN202164744U CN2011201740132U CN201120174013U CN202164744U CN 202164744 U CN202164744 U CN 202164744U CN 2011201740132 U CN2011201740132 U CN 2011201740132U CN 201120174013 U CN201120174013 U CN 201120174013U CN 202164744 U CN202164744 U CN 202164744U
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- clamp piece
- hole
- main body
- intermediate plate
- plate main
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Abstract
An anchorage device clamp piece with high anchoring efficiency belongs to the technical field of prestressing stretch-draw anchoring system assemblies in high transit railways, freeway bridges and building engineering. The anchorage device clamp piece comprises a hollow cone frustum formed by two symmetrically arranged clamp piece main bodies, wherein the outer surface of the large-diameter end of each clamp piece main body is provided with a groove, and a through hole with the semicircle section is arranged in each clamp piece main body. The inner diameters of the lower ends of the through holes are the same, the inner diameters of the upper ends of the through holes extend outwards, and the surfaces of the through holes are provided with threads. The anchorage device clamp piece with the high anchoring efficiency is simple in structure, reasonable in design, obvious in effects on dispersing stress of steel strands, high and stable in anchoring efficiency of anchorage devices and capable of reducing a broken or cut-off phenomenon at small end positions of the clamp pieces caused by stress concentration and preventing the clamp pieces from being broken transversely at elastic groove ends.
Description
Technical field
The utility model belongs to the technical field of the prestressed stretch-draw anchor system components in high-speed railway, bridge on highway, the construction work, is specifically related to a kind of anchor clipper of high anchoring efficient.
Background technology
At speedway, high-speed railway bridge, case beam, industrial premises, dam in the prestressed reinforced concrete construction design of buildings such as nuclear reactor housing, usually adopts the prestressed stretch-draw anchor system that steel strand are applied prestressing force.One of assembly in tensioning rollering fastening system ground tackle can be divided into clip type, supporting type, male cone type and bond four kinds of formulas etc.Strand tapered anchorage is comparatively commonly used.During use, 2 pre-stress anchor clippers combination back forms the frustums of a cone of a hollow, the stretch-draw steel strand apply in the prestressing force process will be single or many steel strand clampings, fix, contract is tightly on anchor slab.Existing clamping piece structure is unreasonable; Make the ground tackle efficiency of anchorage not high and unstable, especially in doing ground tackle assembly static loading test stretching process, steel strand can be concentrated, overstep the extreme limit and break or cut off at the small end inside edge in intermediate plate small end place stress; Cause the not enough or disappearance of prestressing force in the concrete component; Destroy the supporting capacity of building, reduce its application life, increase potential safety hazard.
Summary of the invention
To the problem that prior art exists, the purpose of the utility model is to design the technical scheme that outstanding, high efficiency of anchorage of the suffered stress effect of a kind of dispersed steel twisted wire and stable anchor clipper are provided.
The anchor clipper of described a kind of high anchoring efficient; Comprise the hollow cone platform that constitutes by two symmetrically arranged intermediate plate main bodys; The larger diameter end external surface of described intermediate plate main body is provided with groove, and it is semicircular through hole that the cross section is set in the intermediate plate main body, it is characterized in that the through hole bottom diameter of described through hole equates; The through hole upper-end inner diameter extends out, and through-hole surfaces is provided with screw thread.
The anchor clipper of described a kind of high anchoring efficient is characterized in that the outer angle of flare a that described through hole upper-end inner diameter extends out formation is the 2-6 degree.
The anchor clipper of described a kind of high anchoring efficient is characterized in that arc surface and the intermediate plate main body external surface rounding off of described through hole upper end through being provided with.
The anchor clipper of described a kind of high anchoring efficient, the thread form that it is characterized in that described screw thread is a zigzag structure.
The anchor clipper of described a kind of high anchoring efficient is characterized in that the initial thread form height of screw thread of described through hole upper end is lower, and transits to the height such as screw thread with the through hole lower end gradually.
The anchor clipper of above-mentioned a kind of high anchoring efficient; Simple in structure; Reasonable in design, the suffered stress effect of dispersed steel twisted wire is outstanding, has reduced that the steel strand stress is concentrated and breaking of producing at intermediate plate small end place or cut off phenomenon; Avoided the transverse breakage of intermediate plate at the elastic groove end, the ground tackle anchoring property is high and stable.
When outer angle of flare a is 3 ° of 6', this moment ground tackle efficiency of anchorage can be stable maintain more than 0.98, fatigue test reaches and does not occur the steel strand fracture more than 2,000,000 times, cycle-index is that 50 times cyclic loading test ground tackle is in proper working order.
Description of drawings
Fig. 1 is the structural representation of intermediate plate main body in the utility model;
Fig. 2 is the enlarged drawing at A place among Fig. 1.
Among the figure: the 1-screw thread; The 2-groove; 3-intermediate plate main body; 4a-through hole upper end; 4b-through hole lower end; The 5-arc surface.
The specific embodiment
Further specify the utility model below in conjunction with Figure of description.
As shown in the figure, a kind of anchor clipper of high anchoring efficient adopts alloy steel material, cold upset forming after spheroidizing; Fraising, finish turning male cone (strobilus masculinus) and grooving, exterior angle; Cone angle in falling, tapping is sawed two; Operations such as heat treatment, formation is up-small and down-big intermediate plate main body 3, and two intermediate plate main bodys 3 are combined the frustum of a cone that constitutes hollow during use.
The larger diameter end external surface of intermediate plate main body 3 is provided with groove 2; Be used to place rubber ring; It is semicircular through hole that the cross section is set in the intermediate plate main body 3, and through hole lower end 4b internal diameter equates that through hole upper end 4a internal diameter extends out; Outer angle of flare a angle is the 2-6 degree, and the arc surface 5 and intermediate plate main body 3 external surface rounding ofves of through hole upper end 4a through being provided with.Adopt above-mentioned structure can guarantee that the 3-4 button silk of intermediate plate main body 3 smaller diameter end seamlessly transits; Stress when improving steel strand by stretch-draw is greatly concentrated; Reach the peptizaiton of power; Avoiding steel strand directly to locate stress in the smaller diameter end of intermediate plate main body 3 concentrates, oversteps the extreme limit and break or by being cut off, improve the anchoring property of ground tackle at smaller diameter end end face inside edge.The scope of outer angle of flare a clamping piece structure when 2-6 spends is reasonable, improve effect obviously and the ground tackle anchoring property good.When the α angular region is 3 ° of 6'; The suffered stress effect of pre-stress anchor clipper smaller diameter end dispersed steel twisted wire is outstanding; What the efficiency of anchorage of ground tackle can be stable at this moment maintains more than 0.98; Fatigue test reaches and does not occur steel strand fractures more than 2,000,000 times and break, and cycle-index is that 50 times cyclic loading test ground tackle is in proper working order.
Intermediate plate main body 3 external surfaces adopt complete cone structure (promptly an awl on earth), have increased the contact area of intermediate plate main body 3 with anchor slab dimension hole, make that stress is consistent when moving back anchor.
Be provided with screw thread 1 in the through hole, screw thread 1 thread form is a zigzag, has both guaranteed the grip behind the interlock steel strand, reduces the degree of engagement to steel strand again, and can effectively guarantee the stripped thread phenomenon can not occur.And the initial thread form height of screw thread 1 that is positioned at through hole upper end 4a is lower; And transit to gradually and screw thread 1 height such as grade that is positioned at through hole lower end 4b, the screw thread of such structure decrease through hole upper end 4a reduces the disrumpent feelings rate of steel strand to the degree of biting of steel strand; Improve anchoring efficient yarn number; This intermediate plate main body 3 has been cancelled through hole lower end 4b axial elastic trough simultaneously, improves the occlusal contact area between intermediate plate main body 3 inner conical surface profiles of tooth and the steel strand, has avoided the transverse breakage of intermediate plate main body 3 at the elastic groove end simultaneously.
The anchor clipper of the utility model can slide pre-stress anchor clipper along the anchor slab taper hole and realizes the anchoring to steel strand after external surface saltation polishing, has reliable gripping performance and good in the anchor performance.Special alloy steel makes intermediate plate main body 3 case hardnesses and internal flexibility all be improved behind heat treatment step, satisfies and is superior to national standard, has eliminated fatigability distortion, transverse breakage.
Claims (5)
1. the anchor clipper of a high anchoring efficient; Comprise the hollow cone platform that constitutes by two symmetrically arranged intermediate plate main bodys (3); The larger diameter end external surface of described intermediate plate main body (3) is provided with groove (2), and in the intermediate plate main body (3) cross section being set is semicircular through hole, it is characterized in that through hole lower end (4b) internal diameter of described through hole equates; Through hole upper end (4a) internal diameter extends out, and through-hole surfaces is provided with screw thread (1).
2. the anchor clipper of a kind of high anchoring efficient as claimed in claim 1 is characterized in that the angle that described through hole upper end (4a) internal diameter extends out the outer angle of flare a of formation is the 2-6 degree.
3. the anchor clipper of a kind of high anchoring efficient as claimed in claim 1 is characterized in that the arc surface (5) and intermediate plate main body (3) external surface rounding off of described through hole upper end (4a) through being provided with.
4. the anchor clipper of a kind of high anchoring efficient as claimed in claim 1, the thread form that it is characterized in that described screw thread (1) is a zigzag structure.
5. the anchor clipper of a kind of high anchoring efficient as claimed in claim 1 is characterized in that the initial thread form height of screw thread (1) of described through hole upper end (4a) is lower, and transits to the height such as screw thread (1) grade with through hole lower end (4b) gradually.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201740132U CN202164744U (en) | 2011-05-27 | 2011-05-27 | Anchorage device clamp piece with high anchoring efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201740132U CN202164744U (en) | 2011-05-27 | 2011-05-27 | Anchorage device clamp piece with high anchoring efficiency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202164744U true CN202164744U (en) | 2012-03-14 |
Family
ID=45800582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201740132U Expired - Fee Related CN202164744U (en) | 2011-05-27 | 2011-05-27 | Anchorage device clamp piece with high anchoring efficiency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202164744U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722254A (en) * | 2013-12-18 | 2014-04-16 | 柳州华威合力机械有限责任公司 | Clamping piece tapping clamp |
| CN111665128A (en) * | 2020-07-13 | 2020-09-15 | 西安石油大学 | Variable-rigidity clamping device for fatigue test |
-
2011
- 2011-05-27 CN CN2011201740132U patent/CN202164744U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103722254A (en) * | 2013-12-18 | 2014-04-16 | 柳州华威合力机械有限责任公司 | Clamping piece tapping clamp |
| CN111665128A (en) * | 2020-07-13 | 2020-09-15 | 西安石油大学 | Variable-rigidity clamping device for fatigue test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120314 Termination date: 20160527 |