CN203890897U - Prestress steel strand combing and bundle knitting drawing head - Google Patents
Prestress steel strand combing and bundle knitting drawing head Download PDFInfo
- Publication number
- CN203890897U CN203890897U CN201420322755.9U CN201420322755U CN203890897U CN 203890897 U CN203890897 U CN 203890897U CN 201420322755 U CN201420322755 U CN 201420322755U CN 203890897 U CN203890897 U CN 203890897U
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- steel strand
- drawing head
- head
- wedge
- hole
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Abstract
The utility model provides a prestress steel strand combing and bundle knitting drawing head which comprises a drawing head body, a steel strand fixing plate and a wedge block. The drawing head body comprises a front end ball head and a rear end hollow cylinder, a through drawing hole is formed in the axis of the ball head, an inner hole of the hollow cylinder is a conical hole, the small end of the conical hole is connected with the drawing hole, a threaded hole is formed in the side wall of the rear end of the drawing head, locating holes are formed in the steel strand fixing plate, the number of the locating holes is identical with that of prestress steel strands, and the wedge block is plugged in a gap between the drawing head and the steel strand fixing plate and is connected and fixed through screws. The prestress steel strand combing and bundle knitting drawing head has the advantages that winding of the steel strands and the uneven stress, caused by improper bundle penetrating, of the steel strands in the tensioning process are avoided through the limiting of the steel strand fixing plate. The prestress steel strand combing and bundle knitting drawing head is simple in structure and convenient to assemble and maintain, the stability of components during working is improved, and the relative positions of the steel strands can be still maintained even when penetrating through a corrugated pipe.
Description
Technical field
The invention relates to the utility model and relates to the utensil that the operation of shuttling back and forth in a kind of prestressing technique is used, and relates in particular to a kind of prestress wire comb and compiles bundle drawing head.
Background technology
Prestress wire is the stranded steel cable that has 2,3,7,19 high-tensile steel wires to form, and processes and be applicable to prestressed concrete or similar applications through eliminating stress.
During the construction of construction work prestressing technique, the operation of often shuttling back and forth be walked steel strand in the reinforced frame having tied, and is arranged to certain shape.Reeve and generally by workman, undertaken, need many people to coordinate and wear one by one, waste time and energy, efficiency is low.If steel strand are very long, will increase the difficulty of reeving.In practical application, prestressed reinforced concrete construction is generally the major bearing structures of bridge, pre-stress construction quality is one of key factor affecting bridge main body construction quality, because the span of bridge is larger, reserved prestressed pore passage length is longer, aperture is less, and how making the prestress wire of growing is accurately a construction technology difficult problem through reserving hole channel smoothly.But often due to many, with between steel strand, are easily wound around, intersect in the prior art, not only increased the difficulty while wearing, when steel strand are applied to prestressing force, also can cause the deviation of prestressing force data, affect result of use simultaneously.Each steel strand unbalance stress with bundle, affects its application life, accepts large meeting early fatigue fracture, causes prestressing force to be lost after reaction, and then the downwarp of beam body, collapses, increased use dangerous.
For the ease of traction steel strand, Chinese utility model patent 200820036485.X discloses a kind of steel stranded line rapid traction joint, wherein the design of taper pin has improved propulsive efficiency, but joint body is divided into the design that lock sleeve is fixedly connected with by resilient key assembly with lock sleeve, complex structure, has improved the difficulty operating in part processing and actual production.Chinese utility model patent 200820035829.5 discloses a kind of prestress wire drawing head, comprise drawing head and prestress steel twist thread fixing plate, wherein, the internal thread of drawing head and prestress steel twist thread fixing plate external screw thread are threaded connection, fixed head positioning bolt reinforcement is simultaneously fastening, although simple and compact for structure, fixed head lacks axial restraint, in distraction procedure, steel strand fixed head is connected unstable, easily separated with drawing head.
Summary of the invention
The problem that the invention will solve has been to provide a kind of prestress wire comb and has compiled bundle drawing head.
For solving the problems of the technologies described above, the technical scheme that the invention adopts is: a kind of prestress wire comb is compiled bundle drawing head, comprise drawing head, steel strand fixed head and wedge, described drawing head comprises front end ballhead and rear end hollow cylinder, the axle center of ballhead is provided with the towing pad of perforation, the endoporus of hollow cylinder is that the small end of bellmouth and bellmouth is connected with towing pad, described drawing head rear end sidewall is provided with screwed hole, described steel strand fixed head is provided with the locating hole with the identical number of share of stock of prestress wire, described wedge is filled out the space being placed between drawing head and steel strand fixed head, by dog screw, be connected and fixed.
Preferably, described wedge comprises front end right-angled triangle piece and rear end rectangular block, rectangular block is provided with counter sink, wherein the center line of counter sink overlaps with the center line of drawing head upper screwed hole, the hypotenuse of right-angled triangle piece matches with drawing head interior tapered hole, and wedge bottom surface right-angle side is in the part contacting with steel strand fixed head and be not provided with shoulder with the critical place of steel strand fixed head contact portion.
Preferably, described wedge is at least provided with 2, and it is symmetrical that the set position of wedge should keep.
Preferably, the locating hole on the outer wall of steel strand and described steel strand fixed head is interior along matched in clearance.
The advantage that the invention a has good effect is: owing to adopting technique scheme, and by the restriction of steel strand fixed head, steel strand unbalance stress when having avoided the winding of steel strand and having caused stretch-draw because lashing is improper.The invention is simple in structure, convenient for assembly and maintenance, and the stability while having improved member work, even while passing bellows, still can keep the relative position of many steel strand.
Accompanying drawing explanation
Fig. 1 is the invention structural representation;
Fig. 2 is the invention drawing head structural representation;
Fig. 3 is the invention steel strand fixed plate structure elevation;
Fig. 4 is the invention steel strand fixed plate structure lateral view;
Fig. 5 is the invention steel strand wedge structural representation;
In figure: 1-drawing head, 2-steel strand fixed head, 3-wedge, 4-towing pad, 21-locating hole, 11-screwed hole, 21-counter sink, 5-dog screw.
The specific embodiment
A kind of prestress wire comb is compiled bundle drawing head, comprise drawing head 1, steel strand fixed head 2 and wedge 3, described drawing head 1 comprises front end ballhead and rear end hollow cylinder, the axle center of ballhead is provided with the towing pad 4 of perforation, the endoporus of hollow cylinder is that the small end of bellmouth and bellmouth is connected with towing pad 4, described drawing head 1 rear end sidewall is provided with screwed hole 11, described steel strand fixed head 2 is provided with the locating hole 21 with the identical number of share of stock of prestress wire, described wedge 3 is filled out the space that is placed on 2 of drawing head 1 and steel strand fixed heads, by dog screw 5, be connected and fixed.Described wedge 3 comprises front end right-angled triangle piece and rear end rectangular block, rectangular block is provided with counter sink 31, wherein the center line of counter sink 31 overlaps with the center line of drawing head upper screwed hole 11, the hypotenuse of right-angled triangle piece matches with drawing head 1 interior tapered hole, and wedge 3 bottom surface right-angle sides are in the part contacting with steel strand fixed head 2 and be not provided with shoulder with the critical place of steel strand fixed head 2 contact portions.Described wedge 3 is at least provided with 2, and it is symmetrical that the set position of wedge 3 should keep.Locating hole 21 on the outer wall of steel strand and described steel strand fixed head 2 interior along matched in clearance.
Adopt technique scheme, by the restriction of steel strand fixed head, steel strand unbalance stress when having avoided the winding of steel strand and having caused stretch-draw because lashing is improper.The invention is simple in structure, convenient for assembly and maintenance, and the stability while having improved member work, even while passing bellows, still can keep the relative position of many steel strand.
Above the embodiment of the invention is had been described in detail, but described content is only the preferred embodiment of the invention, can not be considered to for limiting practical range of the present invention.All equalization variations of doing according to the invention scope and improvement etc., within all should still belonging to this patent covering scope.
Claims (4)
1. a prestress wire comb is compiled bundle drawing head, it is characterized in that: comprise drawing head (1), steel strand fixed head (2) and wedge (3), described drawing head (1) comprises front end ballhead and rear end hollow cylinder, the axle center of ballhead is provided with the towing pad (4) of perforation, the endoporus of hollow cylinder is that the small end of bellmouth and bellmouth is connected with towing pad (4), described drawing head rear end sidewall is provided with screwed hole (11), described steel strand fixed head (2) is provided with the locating hole (21) with the identical number of share of stock of prestress wire, described wedge (3) is filled out the space being placed between drawing head (1) and steel strand fixed head (2), by dog screw (5), be connected and fixed.
2. a kind of prestress wire comb according to claim 1 is compiled bundle drawing head, it is characterized in that: described wedge (3) comprises front end right-angled triangle piece and rear end rectangular block, rectangular block is provided with counter sink (31), wherein the center line of counter sink (31) overlaps with the center line of drawing head upper screwed hole (11), the hypotenuse of right-angled triangle piece matches with drawing head (1) interior tapered hole, and wedge (3) bottom surface right-angle side is in the part contacting with steel strand fixed head (2) and be not provided with shoulder with the critical place of steel strand fixed head (2) contact portion.
3. a kind of prestress wire comb according to claim 2 is compiled bundle drawing head, it is characterized in that: described wedge (3) is at least provided with 2, and it is symmetrical that the set position of wedge (3) should keep.
4. a kind of prestress wire comb according to claim 1 is compiled bundle drawing head, it is characterized in that: the locating hole (21) on the outer wall of steel strand and described steel strand fixed head (2) interior along matched in clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322755.9U CN203890897U (en) | 2014-06-16 | 2014-06-16 | Prestress steel strand combing and bundle knitting drawing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420322755.9U CN203890897U (en) | 2014-06-16 | 2014-06-16 | Prestress steel strand combing and bundle knitting drawing head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203890897U true CN203890897U (en) | 2014-10-22 |
Family
ID=51717319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420322755.9U Expired - Fee Related CN203890897U (en) | 2014-06-16 | 2014-06-16 | Prestress steel strand combing and bundle knitting drawing head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203890897U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758838A (en) * | 2016-12-26 | 2017-05-31 | 河南省交通规划设计研究院股份有限公司 | A kind of precompressed steel strand wires safety control |
-
2014
- 2014-06-16 CN CN201420322755.9U patent/CN203890897U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106758838A (en) * | 2016-12-26 | 2017-05-31 | 河南省交通规划设计研究院股份有限公司 | A kind of precompressed steel strand wires safety control |
| CN106758838B (en) * | 2016-12-26 | 2018-07-20 | 河南省交通规划设计研究院股份有限公司 | A kind of precompressed steel strand wires safety control |
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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: 20141022 Termination date: 20160616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |