CN102619304A - Limiting device of clip-type anchorage used for prestressed tendons - Google Patents
Limiting device of clip-type anchorage used for prestressed tendons Download PDFInfo
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- CN102619304A CN102619304A CN2011102594227A CN201110259422A CN102619304A CN 102619304 A CN102619304 A CN 102619304A CN 2011102594227 A CN2011102594227 A CN 2011102594227A CN 201110259422 A CN201110259422 A CN 201110259422A CN 102619304 A CN102619304 A CN 102619304A
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- limiting plates
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Abstract
The name of the invention is a limiting device of a clip-type anchorage used for prestressed tendons. The invention relates to a limit height adjustable limiting device of a clip-type anchorage used for prestressed tendons. The device mainly solves the problems that, during the tension construction process of a bridge prestressed steel strand, changes of a steel strand diameter and anchorage manufacturers results in the uselessness of limiting plates and the production cost increase of a using unit, too many limiting plates of various heights on a using site brings increased management difficult and may results in mixed use, and prestressing construction that does not meet design requirements can bring about potential security risks to projects. According to the invention, a screw is screwed in along the axial direction of a nut, and a fastening bolt for fastening the screw is mounted along the radial direction of the nut. With the invention, the number of the limiting plates can be reduced, the investment is saved, and the production cost is lowered. And the limiting device has universality to limiting plates of different manufacturers. Reduction of the limiting plate number avoids the misuse caused by excess limiting plates during on-site construction, thus reducing security risks.
Description
Technical field
The present invention relates to the stretch-draw of a kind of use for tendon strand tapered anchorage and use limiting plate, relate to the stopping means of a kind of use for tendon strand tapered anchorage stretch-draw specifically with the adjustable limiting degree of depth.
Background technology
Prestressed concrete technology is mainly used in concrete structure engineerings such as railway, highway bridge, oil tank and water tower, pressure pipeline and railroad sleeper, and field such as highrise building, underground building, ocean engineering, nuclear power station engineering, TV transmission tower, earth anchor Foundation Design, lifting transportation.Core parts as prestressed concrete technology--ground tackle not only consumption increases rapidly, and performance requirement is also strict more.For the strand tapered anchorage that has from the anchor function, need adopt stopping means during stretch-draw, be commonly called as " limiting plate ", limit the drag-out of steel strand to intermediate plate, be that intermediate plate provides initial clamping force during from anchor simultaneously, to guarantee steady anchoring to steel strand in oil return.The spacing height of limiting plate should be confirmed according to the real size of intermediate plate, anchor hole size and steel strand diameter.Spacing height is bigger than normal, and intermediate plate is just little to the initial clamping force of steel strand, though reduced anchor mouth frictional resistance, the retraction loss is big, and possible stripped thread; Spacing height is less than normal, can cause the serious scratch of intermediate plate to steel strand, even pawl, stripped thread, and forfeiture is to the anchoring of steel strand; Therefore for the producer of each strand tapered anchorage, the spacing height of oneself is arranged all according to the steel strand diameter like 15.2,1860 grades of steel strand of φ.
For guaranteeing safety concerning the railway engineering of national economy; Railroad industry standard TB/T 3193-2008 " railway engineering use for tendon strand tapered anchorage, anchor clamps and connector technique condition " regulation: the spacing height of limiting plate in the time of should providing the steel strand diameter in the ground tackle operation instruction and be φ 15.2mm, and the concrete parameter of spacing plate height when the every increase of steel strand diameter 0.1mm is provided.The stopping means that railway ground tackle stretch-draw is at present adopted is a monolithic, highly fixing limiting plate; The tolerance of the steel strand diameter of φ 15.2 is-0.2～+ 0.4; When guaranteeing site operation; Applying unit can in time be changed the limiting plate of coupling according to the steel strand real size; Applying unit needs according to railway systems standard TB/T 3193-2008 requirement, assorts from the limiting plate of totally 7 kinds of spacing height between φ 15.0～15.6mm.By the minimum one class of operation of each beam making field, 4 calculating of every kind of specification need 28 of limiting plates altogether; If any then needing more limiting plates more than one class; Limiting plate uses distortion after a period of time, press to collapse etc. and cause spacing change in depth, and new limiting plate need in time be provided.Simultaneously because each manufacturer's clamping piece structure and not quite identical, the spacing degree of depth of the limiting plate of using with the diameter steel twisted wire is also different, also must change limiting plate when causing changing producer.Therefore also increased the cost of production of applying unit.Spacing degree of depth adjustment is the problem of a more complicated; With the working experience of construction team much relations are arranged, bring all limiting plates like the scene, management brings confusion to limiting plate, brings hidden danger to construction quality.Do not have the fine requirement that concerns in the practice of construction and operate, bring potential safety hazard to workmanship by the steel strand and the corresponding degree of depth of the spacing degree of depth.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned deficiency, and provide a kind ofly have a versatility, reduce the stopping means of the use for tendon strand tapered anchorage stretch-draw of potential safety hazard with spacing depth-adjustment.
Technical solution of the present invention is: use for tendon strand tapered anchorage stopping means is: along nut axially be screwed into screw, along the tight fixed bolt that radially is provided with lock screw of nut.
At least be provided with five five equilibrium grooves on the screw excircle described in the technical solution of the present invention.
Nut excircle described in the technical solution of the present invention radially is provided with three screws at least.
The number of the screw that the nut excircle described in the technical solution of the present invention directly makes progress and the groove number on the screw excircle be prime number each other.
Beneficial effect of the present invention:
A. saved input, reduced cost of production: for from the steel strand between φ 15.0～15.6mm, only needed 4 steel strand that can satisfy all dimensions, reduced limiting plate quantity, reduced cost of production like one class of operation;
B. has versatility: as long as anchor ring taper hole calibration is basic identical, can satisfy instructions for use through adjusting the spacing degree of depth for different manufacturers;
C. reduced hidden danger of quality: limiting plate quantity reduces, and management is simple, and one on each oil top has avoided too many because of limiting plate quantity, gives the misuse that causes in the site operation; Or press in using to collapse because of limiting plate and cause spacing change in depth can not in time change the prestressing force that limiting plate causes not reach the hidden danger of quality of designing requirement.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the upward view of Fig. 1.
Fig. 3 is the structural representation of nut among Fig. 1.
Fig. 4 is the upward view of Fig. 3.
Fig. 5 is the structural representation of screw among Fig. 1.
Fig. 6 is the upward view of Fig. 5.
The specific embodiment
Like Fig. 1,2,3,4,5, shown in 6; On the cylindrical of screw 2, be provided with nut 1 in the screw thread that is complementary of screw thread on the circle; Screw 2 is packed into through the screw thread on its cylindrical in the nut 1 vertically, is spacing height 4 on the last plane of screw 2 and the nut 1 between the plane, on the excircle of screw 2, is provided with some five equilibrium grooves 6; Be located at the groove number of five equilibrium groove 6 on screw 2 excircles, generally be no less than five; Radially be provided with some screws 5 on the excircle of nut 1, screw 5 is located on nut 1 excircle on the same plane, and the number of screw 5 generally is no less than three; The number of groove 6 prime number each other on the number of screw 5 and screw 2 excircles radially on nut 1 excircle; Be provided with tight fixed bolt 3 in the radially screw 5 on nut 1 excircle.
The initial spacing degree of depth of the present invention is confirmed: the spacing degree of depth of steel strand of the every kind of specification that provides according to ground tackle producer; Rotary screw 2; Make the size of spacing height 4 equal the spacing height that steel strand mate in the actual use, guarantee to tighten tight fixed bolt 3 then in the groove 6 on a tight fixed bolt 3 entering screws 2 circumference; Make screw 2 lockings, spacing height 4 changes in avoiding the use of.Spacing height 4 like φ 15.20mm steel strand coupling is 8.0mm, and rotary screw 2 makes spacing height 4=8.0 ± 0.05mm; Suitable rotary screw 2, guaranteeing has in the groove 6 on a screw 3 entering screws 2 circumference, tightens tight fixed bolt 3 then successively, guarantees that screw 2 and nut 1 do not have relative motion, and spacing height 4 is stablized.
Spacing degree of depth adjustment of the present invention: as shown in Figure 1, be provided with five tightening screws 5 with nut 1, screw 2 circumference are provided with eight grooves 6 and are example; Groove 6 on screw 2 circumference; In every 1/40 week of rotation, just can guarantee to make limiting plate locking in the groove 6 on tight fixed bolt 3 entering screws 2 circumference.If nut 1 adopts the closely-pitched pitch of 1.5mm, in 2 every 1/40 weeks of rotation of screw, the change in size of the spacing height 4 among Fig. 1 is 0.0375mm; Because strand tapered anchorage adopts the tapering self-locking, tapering is about 7 °, and during steel strand vary in diameter 0.1mm, spacing height 4 changes about 0.4mm, allows spacing height 4 to have ± error of 0.05mm simultaneously.Spacing height 4 like φ 15.30mm steel strand coupling is 8.4mm, 2 11/40 weeks of rotation of screw, spacing height 4 change in size 0.4125mm; Spacing height 4=8.4125mm; Differ 0.0125 with 8.4mm, in 8.4 ± 0.05mm scope, satisfy instructions for use; And can lock, guarantee that screw 2 and nut 1 do not have relative motion; Bearing surface is pressed when spacing height 4 diminishes when collapsing, and can unclamp tight fixed bolt 3, is adjusted to proper height according to last method.
Different manufacturers coupling adjustment: because each producer's intermediate plate pitch, cone angle are inconsistent, spacing height 4 is also different, if any the spacing height 4 of the φ 15.20mm of producer steel strand coupling be 8.2mm; Can unclamp tight fixed bolt 3 during adjustment, 2 5/40 weeks of rotation of screw, spacing height 4 change in size 0.1875mm; Spacing height 4=8.1875mm; Differ 0.0125 with 8.2mm, in 8.2 ± 0.05mm scope, get final product by last method locking then.Can be adjusted in the tolerance allowed band for arbitrary dimension, and ability lock screw 2 and nut 1 position, the work timing bit depth is remained unchanged.
Claims (4)
1. use for tendon strand tapered anchorage stopping means is characterized in that: along nut (1) axially be screwed into screw (2), along the tight fixed bolt that radially is provided with lock screw (2) (3) of nut (1).
2. a kind of use for tendon strand tapered anchorage stopping means according to claim 1 is characterized in that: described screw (2) excircle is provided with and is no less than five five equilibrium grooves (6).
3. a kind of use for tendon strand tapered anchorage stopping means according to claim 1 is characterized in that: described nut (1) excircle radially is provided with and is no less than three screws (5).
4. according to claim 1,2 or 3 described a kind of use for tendon strand tapered anchorage stopping means, it is characterized in that: the groove number (6) on the number of the screw (5) that described nut (1) excircle directly makes progress and screw (2) excircle is prime number each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102594227A CN102619304A (en) | 2011-09-05 | 2011-09-05 | Limiting device of clip-type anchorage used for prestressed tendons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102594227A CN102619304A (en) | 2011-09-05 | 2011-09-05 | Limiting device of clip-type anchorage used for prestressed tendons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102619304A true CN102619304A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102594227A Pending CN102619304A (en) | 2011-09-05 | 2011-09-05 | Limiting device of clip-type anchorage used for prestressed tendons |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995906A (en) * | 2012-12-05 | 2013-03-27 | 柳州市桥厦工程管材有限公司 | Prestress tension limit plate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095901U (en) * | 1991-04-23 | 1992-02-12 | 唐山工程技术学院 | Carbon steel wire anchor |
| FR2781854A1 (en) * | 1998-07-28 | 2000-02-04 | Freyssinet Int Stup | MONOBLOCK PIECE FOR THE PRODUCTION OF A CABLE ANCHORING Jaw, AND METHOD FOR MANUFACTURING SUCH A JIT |
| CN2575225Y (en) * | 2002-11-01 | 2003-09-24 | 开封市亚光预应力设备厂 | Electric heating health care watch post |
| CN202347734U (en) * | 2011-09-05 | 2012-07-25 | 襄阳中铁宏吉工程技术有限公司 | Limiting device for wedge-type anchors for prestressed reinforcements |
-
2011
- 2011-09-05 CN CN2011102594227A patent/CN102619304A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2095901U (en) * | 1991-04-23 | 1992-02-12 | 唐山工程技术学院 | Carbon steel wire anchor |
| FR2781854A1 (en) * | 1998-07-28 | 2000-02-04 | Freyssinet Int Stup | MONOBLOCK PIECE FOR THE PRODUCTION OF A CABLE ANCHORING Jaw, AND METHOD FOR MANUFACTURING SUCH A JIT |
| CN2575225Y (en) * | 2002-11-01 | 2003-09-24 | 开封市亚光预应力设备厂 | Electric heating health care watch post |
| CN202347734U (en) * | 2011-09-05 | 2012-07-25 | 襄阳中铁宏吉工程技术有限公司 | Limiting device for wedge-type anchors for prestressed reinforcements |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995906A (en) * | 2012-12-05 | 2013-03-27 | 柳州市桥厦工程管材有限公司 | Prestress tension limit plate |
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Application publication date: 20120801 |