CN202347734U - Limiting device for wedge-type anchors for prestressed reinforcements - Google Patents
Limiting device for wedge-type anchors for prestressed reinforcements Download PDFInfo
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- CN202347734U CN202347734U CN2011203293237U CN201120329323U CN202347734U CN 202347734 U CN202347734 U CN 202347734U CN 2011203293237 U CN2011203293237 U CN 2011203293237U CN 201120329323 U CN201120329323 U CN 201120329323U CN 202347734 U CN202347734 U CN 202347734U
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Abstract
The utility model discloses a limiting device for wedge-type anchors for prestressed reinforcements. The utility model relates to a limiting device, by which the limited height of a wedge-type anchor for prestressed reinforcements can be adjusted. The utility model is mainly designed for solving the problem that in the process of carrying out tensioning construction on pre-stressed steel strands of bridges, because of the diameter changes of the steel strands and the change of anchor manufacturers, limiting plates can not be used, so that the production cost of an application department is increased, and because too many limiting plates with various heights are used at the application sites, the management difficulty of the limiting plates is large, the mixed application of the limiting plates is possibly caused, and the prestressed construction can not meet the design requirements, thereby bringing potential safety hazards to projects. According to the utility model, a screw is screwed in the device along the axial direction of a nut, and a set-screw for locking the screw is arranged along the radial direction of the nut. By using the limiting device disclosed by the utility model, the number of limiting plates is reduced, the investment is saved, and the production cost is reduced. For different manufacturers, the limiting plate has generality. The number of the limiting plate is reduced, thereby avoiding the misapplication of the limiting plates in on-site construction because the limiting plate is large in number, and reducing the potential quality hazards.
Description
Technical field
The utility model relates to the stretch-draw of a kind of use for tendon strand tapered anchorage and uses limiting plate, relates to the stopping means of a kind of use for tendon strand tapered anchorage stretch-draw with the adjustable limiting degree of depth specifically.
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 purpose of the utility model 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.
The technical solution of the utility model 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 utility model.
Nut excircle described in the technical solution of the utility model radially is provided with three screws at least.
The number of the screw that the nut excircle described in the technical solution of the utility model directly makes progress and the groove number on the screw excircle be prime number each other.
The beneficial effect of the utility model:
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 the structural representation of the utility model.
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 utility model 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.
The spacing degree of depth adjustment of the utility model: 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 number of the groove (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 |
|---|---|---|---|
| CN2011203293237U CN202347734U (en) | 2011-09-05 | 2011-09-05 | Limiting device for wedge-type anchors for prestressed reinforcements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203293237U CN202347734U (en) | 2011-09-05 | 2011-09-05 | Limiting device for wedge-type anchors for prestressed reinforcements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202347734U true CN202347734U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203293237U Expired - Fee Related CN202347734U (en) | 2011-09-05 | 2011-09-05 | Limiting device for wedge-type anchors for prestressed reinforcements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202347734U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619304A (en) * | 2011-09-05 | 2012-08-01 | 襄阳中铁宏吉工程技术有限公司 | Limiting device of clip-type anchorage used for prestressed tendons |
-
2011
- 2011-09-05 CN CN2011203293237U patent/CN202347734U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619304A (en) * | 2011-09-05 | 2012-08-01 | 襄阳中铁宏吉工程技术有限公司 | Limiting device of clip-type anchorage used for prestressed tendons |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120725 Termination date: 20170905 |