CN103630443B - Anchorage clip for steel strand fatigue test - Google Patents
Anchorage clip for steel strand fatigue test Download PDFInfo
- Publication number
- CN103630443B CN103630443B CN201310719792.3A CN201310719792A CN103630443B CN 103630443 B CN103630443 B CN 103630443B CN 201310719792 A CN201310719792 A CN 201310719792A CN 103630443 B CN103630443 B CN 103630443B
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- CN
- China
- Prior art keywords
- steel strand
- intermediate plate
- clamp groove
- groove
- fatigue test
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- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000009661 fatigue test Methods 0.000 title claims abstract description 18
- 230000002035 prolonged effect Effects 0.000 claims 1
- 206010016256 fatigue Diseases 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 2
- 208000019300 CLIPPERS Diseases 0.000 description 1
- 208000021930 chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids Diseases 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
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- Clamps And Clips (AREA)
Abstract
A kind of anchorage clip for steel strand fatigue test of the present invention, including some intermediate plates being trapped among together and can extrude to axle center, the outer surface of some intermediate plates is combined into beloid taper seat and inner surface surrounds cylindrical clamp groove, the rear portion of taper seat is provided with a circle and tightens up spring fixing groove, the intermediate plate inner surface at clamp groove rear portion is provided with annular tooth, in the middle part of clamp groove and anterior intermediate plate inner surface be provided with some side by side and the annular relief groove at interval, clamp groove front portion is provided with guide section.The invention has the beneficial effects as follows: reliable to the firm grip of steel strand wires; annular relief groove is used to make intermediate plate that the chucking power of steel strand wires to be evenly distributed; not damaged; avoid producing tired source; prevent steel strand wires from because of clamping, fatigability fracture occurring; can correctly evaluate steel strand wires fatigue behaviour, protection intermediate plate itself, improves service life simultaneously.
Description
Technical field
The present invention relates to a kind of anchorage clip for steel strand fatigue test.
Background technology
Current domestic steel strand wires experiment on fatigue properties uses with annular tooth mostly, the intermediate plate of point-like tooth, or directly use engineering anchor clipper clamping steel strand wires, during fatigue test, the annular tooth of intermediate plate holds steel strand wires, but due to steel strand wires discontinuity, there is impression and becomes tired source in the position of clamping, and then occur steel strand wires to break in chuck during fatigue test, formed " notch effect ", and this situation once occurs, judge according to the standard of GB/T5224-2003 " steel strand wires for prestressed concrete ", this test is invalid, therefore steel strand wires fatigue behaviour can not correctly be evaluated.
Summary of the invention
For solving above technical deficiency, the invention provides a kind of energy and clamp steel strand wires solid and reliablely, it is to avoid steel strand wires are because clamping the anchorage clip for steel strand fatigue test occurring to be ruptured by fatigability.
The present invention is achieved by the following measures:
A kind of anchorage clip for steel strand fatigue test of the present invention, is trapped among together and can be to axle including some
The intermediate plate of heart extruding, the outer surface of some intermediate plates is combined into beloid taper seat and inner surface surrounds cylindrical clamp groove, the rear portion of taper seat is provided with a circle and tightens up spring fixing groove, the intermediate plate inner surface at clamp groove rear portion is provided with annular tooth, in the middle part of clamp groove and anterior intermediate plate inner surface be provided with some side by side and the annular relief groove that is spaced.
Length L of above-mentioned clamp groove is 15 ~ 30 times of clamp groove diameter phi D, and the cone angle of taper seat is 12 ° ~ 18 °.
Groove width m of above-mentioned annular relief groove is 2 ~ 3mm, and spacing n of annular relief groove is 10 ~ 15mm.
Above-mentioned clamp groove rear portion is provided with 2 times that length L3 is clamp groove diameter phi D at annular tooth.
Above-mentioned taper seat front end is extended with guide section, and length L1 of described guide section is 10 ~ 20mm, and cone angle beta is 5 ° ~ 8 °.
Crest diameter phi C of above-mentioned annular tooth is less than clamp groove diameter phi D, and the root diameter φ M of annular tooth is more than clamp groove diameter phi D.
Hardness H of above-mentioned intermediate plate outer surface is HRC58 ~ HRC62, and roughness K of intermediate plate outer surface is 0.8.
Above-mentioned intermediate plate is identical two or three, spacing 2 ~ 3mm.
The invention has the beneficial effects as follows: reliable to the firm grip of steel strand wires; annular relief groove is used to make intermediate plate that the chucking power of steel strand wires to be evenly distributed; not damaged; avoid producing tired source; prevent steel strand wires from because of clamping, fatigability fracture occurring; can correctly evaluate steel strand wires fatigue behaviour, protection intermediate plate itself, improves service life simultaneously.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the present invention.
Fig. 2 is backsight structural representation of the present invention.
Fig. 3 is the structure for amplifying schematic diagram of Y portion in Fig. 1.
Wherein: 1 intermediate plate, 2 clamp grooves, 3 annular relief groove, 4 annular teeth, 5 tighten up spring fixing groove, 6 guide sections.
Detailed description of the invention
It is described further below in conjunction with the accompanying drawings.
As it is shown in figure 1, a kind of anchorage clip for steel strand fatigue test of the present invention, including some intermediate plates
1, can be two or three, spacing 2 ~ 3mm, illustrate with three intermediate plates 1 now.Three intermediate plates 1 are trapped among together, the outer surface of intermediate plate 1 is combined into beloid taper seat and inner surface surrounds cylindrical clamp groove 2, the rear portion of taper seat is provided with a circle and tightens up spring fixing groove 5, intermediate plate 1 inner surface at clamp groove 2 rear portion is provided with annular tooth 4, in the middle part of clamp groove 2 and anterior intermediate plate 1 inner surface be provided with some side by side and the annular relief groove 3 that is spaced.Tightening up spring embedding and tighten up spring fixing groove 5, under the effect tightening up spring or anchor set, three intermediate plates 1 can extrude to axle center.
Through great many of experiments, present invention effect in the case of setting following parameter is best, and length L of clamp groove 2 is 15 ~ 30 times of clamp groove 2 diameter phi D, and the cone angle of taper seat is 12 ° ~ 18 °, intermediate plate 1 is solid and reliable to the chucking power of steel strand wires, it is possible to meet the requirement of fatigue test.Groove width m of annular relief groove 3 is 2 ~ 3mm, and spacing n of annular relief groove 3 is 10 ~ 15mm, rounding bottom annular relief groove 3, annular relief groove 3 makes chucking power dispersed, not damaged, it is to avoid produce tired source, prevents steel strand wires from because of clamping, fatigability fracture occurring.
Crest diameter phi C of annular tooth 4 is less than clamp groove 2 diameter phi D, and the root diameter φ M of annular tooth 4 is more than clamp groove 2 diameter phi D.Wire casing rear portion is provided with 2 times that length L3 is clamp groove 2 diameter phi D at annular tooth 4.Under the effect tightening up spring, three intermediate plate 1 rear portions are first tightened up, and steel strand wires are first gripped by annular tooth 4, are not intended as main retaining part, for preventing the steel strand wires just put into from slipping.Taper seat front end is extended with guide section 6, and length L1 of guide section 6 is 10 ~ 20mm, and cone angle beta is 5 ° ~ 8 °, conveniently penetrates anchor set.Hardness H of intermediate plate 1 outer surface is HRC58 ~ HRC62, and roughness K of intermediate plate 1 outer surface is 0.8.
Its operation principle is: steel strand wires to be held are through the clamp groove 2 in the middle of intermediate plate 1, tighten up under spring radial forces in spring fixing groove 5 is tightened up at rear portion, first annular tooth 4 clamps steel strand wires, steel strand wires drive intermediate plate 1 to travel forward under external force, intermediate plate 1 is radial contraction under matched anchor set effect, make intermediate plate 1 middle front part wrap up in and hold steel strand wires, annular pressure relief groove portion makes chucking power dispersed, on the premise of ensureing steel strand wires firm grip, it is to avoid produce steel strand wires because of clamping generation fatigability fracture.
The above is only the preferred implementation of this patent; it should be pointed out that, for those skilled in the art, on the premise of without departing from the art of this patent principle; can also make some improvement and replacement, these improve and replace the protection domain that also should be regarded as this patent.
Claims (8)
1. an anchorage clip for steel strand fatigue test, it is characterised in that: include some being trapped among together and can extruding to axle center
Intermediate plate, the outer surface of some intermediate plates is combined into beloid taper seat and inner surface surrounds the clamp groove of cylinder, taper seat
Rear portion be provided with a circle and tighten up spring fixing groove, the intermediate plate inner surface at clamp groove rear portion is provided with annular tooth, in the middle part of clamp groove
And anterior intermediate plate inner surface be provided with some side by side and the annular relief groove at interval.
2. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: length L of described clamp groove
Being 15 ~ 30 times of clamp groove diameter phi D, the cone angle of taper seat is 12 ° ~ 18 °.
3. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: the groove of described annular relief groove
Wide m is 2 ~ 3mm, and spacing n of annular relief groove is 10 ~ 15mm.
4. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: described clamp groove rear portion sets
It is equipped with 2 times that length L3 is clamp groove diameter phi D at annular tooth.
5. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: described taper seat front end is prolonged
Stretching and have guide section, length L1 of described guide section is 10 ~ 20mm, and cone angle beta is 5 ° ~ 8 °.
6. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: the crest of described annular tooth
Diameter phi C is less than clamp groove diameter phi D, and the root diameter φ M of annular tooth is more than clamp groove diameter phi D.
7. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: described intermediate plate outer surface
Hardness H is HRC58 ~ HRC62, and roughness K of intermediate plate outer surface is 0.8.
8. according to anchorage clip for steel strand fatigue test described in claim 1, it is characterised in that: described intermediate plate is identical
Two or three, spacing 2 ~ 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719792.3A CN103630443B (en) | 2013-12-20 | 2013-12-20 | Anchorage clip for steel strand fatigue test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310719792.3A CN103630443B (en) | 2013-12-20 | 2013-12-20 | Anchorage clip for steel strand fatigue test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103630443A CN103630443A (en) | 2014-03-12 |
| CN103630443B true CN103630443B (en) | 2016-11-02 |
Family
ID=50211722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310719792.3A Expired - Fee Related CN103630443B (en) | 2013-12-20 | 2013-12-20 | Anchorage clip for steel strand fatigue test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103630443B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105277427A (en) * | 2014-07-14 | 2016-01-27 | 宝钢集团南通线材制品有限公司 | Low frequency fatigue detection method of pre-stressed steel strand |
| CN104690665B (en) * | 2015-02-16 | 2017-04-19 | 沈阳工业大学 | Double-layer jig for fatigue elongation test of ordinary steel bar and prestressed steel bar, as well as mounting technique for double-layer jig |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2446200Y (en) * | 2000-08-16 | 2001-09-05 | 柳州欧维姆建筑机械有限公司 | Ground tackle clamping sheet |
| CN201273030Y (en) * | 2008-11-05 | 2009-07-15 | 湖南省第六工程有限公司 | Portable steel stranded wire clamper |
| CN201843262U (en) * | 2010-08-27 | 2011-05-25 | 天津鑫坤泰预应力专业技术有限公司 | Anchorage device clamping piece capable of increasing friction force |
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2013
- 2013-12-20 CN CN201310719792.3A patent/CN103630443B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103630443A (en) | 2014-03-12 |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160523 Address after: Ssangyong Village South Outer Ring Road, South Central Qixian town Ji'nan City, Shandong province 250000 City Applicant after: JINAN DONGCE TESTING MACHINE TECHNOLOGY CO.,LTD. Applicant after: TIANJIN METALLURGICAL GROUP FLOURISH STEEL INDUSTRIAL Co.,Ltd. Address before: Ssangyong Village South Outer Ring Road, South Central Qixian town Ji'nan City, Shandong province 250000 City Applicant before: JINAN DONGCE TESTING MACHINE TECHNOLOGY CO.,LTD. |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161102 |
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| CF01 | Termination of patent right due to non-payment of annual fee |