CN102359231A - Heat treatment high-yield-ratio steel bar pre-tensioning clamp and using method thereof - Google Patents
Heat treatment high-yield-ratio steel bar pre-tensioning clamp and using method thereof Download PDFInfo
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- CN102359231A CN102359231A CN2011102234679A CN201110223467A CN102359231A CN 102359231 A CN102359231 A CN 102359231A CN 2011102234679 A CN2011102234679 A CN 2011102234679A CN 201110223467 A CN201110223467 A CN 201110223467A CN 102359231 A CN102359231 A CN 102359231A
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- reinforcing bar
- anchor clamps
- anchor ring
- heat treatment
- taper hole
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 title abstract description 11
- 239000010959 steel Substances 0.000 title abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 66
- 210000004907 gland Anatomy 0.000 claims description 26
- 239000004567 concrete Substances 0.000 claims description 18
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 18
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 6
- 208000004141 microcephaly Diseases 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 abstract description 7
- 239000011513 prestressed concrete Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000677 High-carbon steel Inorganic materials 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
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Abstract
The invention relates to a pretensioned clamp for heat treatment of high-strength-to-yield ratio steel bars and a manufacturing method thereof, and the pretensioned clamp is characterized in that: the anchor ring comprises a cylindrical anchor ring, wherein the inner diameter of the anchor ring is a conical hole, three clamping pieces which are 120 degrees to each other are arranged in the conical hole, a groove is formed in the outer wall of the large end of each clamping piece, and an O-shaped sealing ring which connects the three clamping pieces into a whole is arranged in the groove; each clamping piece inner wall all is provided with the screw thread, screw thread radial cross-section is the zigzag. The invention can well realize the anchoring of the high-yield-ratio steel bar during tensioning, has large clamping force on the steel bar and high anchoring efficiency, and can be repeatedly used. The invention can be widely applied to the construction process of the pre-tensioning method of the prestressed concrete in the field of buildings.
Description
Technical field
The present invention relates to a kind of tension clamp and method for using thereof, particularly open anchor clamps and method for using thereof earlier about a kind of high strong flexor ratio reinforcing bar of heat treatment (high-strength PC rod iron) that in prestressed concrete pre-tensioned method construction, uses.
Background technology
The present prestressed reinforcement of China mainly adopts high tensile steel wire, the steel strand of high-carbon steel series, and its strength standard value is 1570MPa～1860MPa, but need carry out pickling in the manufacturing process of high tensile steel wire, steel strand, thereby causes environment pollution.For fear of pickling, reduce environment pollution, China Iron & Steel Research Institute Group has successfully developed with the for prestressed concrete heat treatment high strong flexor ratio reinforcing bar of low-alloy steel wire through the alternative high tensile steel wire of heat treatment, steel strand, has filled up a domestic blank.The specification of present this new product has φ 7mm, φ 9mm, and intensity is 800MPa, 970MPa, 1270MPa level etc.But China does not still have ready-made anchor clamps can realize stretch-draw and anchoring to this reinforcing bar at present.
Summary of the invention
To the problems referred to above, it is reliable to the purpose of this invention is to provide a kind of anchoring property, and efficiency factor is high, and is easy to operate, and can open anchor clamps and method for using thereof earlier by the high strong flexor ratio reinforcing bar of reusable heat treatment for prestressed concrete.
For realizing above-mentioned purpose; The present invention takes following technical scheme: the high strong flexor ratio reinforcing bar of a kind of heat treatment is opened anchor clamps earlier; It is characterized in that: it comprises the cylindrical shape anchor ring, and said anchor ring internal diameter is a taper hole, is provided with three intermediate plates that are mutually 120 ° in the said taper hole; The stub end outer wall of said intermediate plate is provided with groove, is provided with an O RunddichtringO that three said intermediate plates are linked into an integrated entity in the said groove; Each said intermediate plate inwall is provided with thread, said thread radial section indention.
The coning angle of the taper hole that said anchor ring is inner is 11 °～15 °, and the coning angle of three said intermediate plate male cone (strobilus masculinus)s after the combination than the taper hole coning angle on the said anchor ring big by 5 '～30 '.
The addendum angle of said thread is γ, and 76 °≤γ≤78 °, the angle, forward position of thread is β, and 69 °≤β≤71 °, the tooth distance of thread is t, 0.75 millimeter≤t≤1.25 millimeters.
The microcephaly of said intermediate plate holds endoporus to be provided with one section horn-like opening that outer imperial palace is little.
The angular aperture of said opening is θ, 6 °≤θ≤8 °; The length of opening is l, 7 millimeters≤l≤10 millimeters.
Taper hole afterbody in said anchor ring is provided with one section straight hole again; The port of said straight hole is provided with three convex bayonet sockets that are mutually 120 °, is provided with a spring in the said straight hole, is provided with a gland at the afterbody of said spring; Said gland is provided with three pairs of boss with the convex bayonet fittings of said straight hole; Each height to said boss is a height, and one is low, during each low said boss location; Be fastened in the convex bayonet socket of a said straight hole, and high said boss card leans against the edge of said convex bayonet socket.
The high strong flexor ratio reinforcing bar of above-mentioned a kind of heat treatment is opened the method for using of anchor clamps earlier; May further comprise the steps: 1) reinforcing bar is penetrated and open earlier in the crossbeam of pedestal end; Taper hole small end with an anchor clamps anchor ring is inserted in from reinforcing bar one end termination again; And press close to open earlier pedestal end crossbeam, will be inserted in from the external part of reinforcing bar through three little head ends of intermediate plate of O RunddichtringO assembling then, and be installed in the taper hole of anchor ring as fixed end; The employing same procedure is installed, and another anchor clamps is installed in the stretching end of reinforcing bar; 2) knock the stub end of three intermediate plates of reinforcing bar fixed end with hammer, make the clamp reinforcing bar of this end; 3) with the stretch-draw end of tensioning equipment tension reinforcing steel bar to predetermined value; 4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar, the screen resilience of reinforcing bar just produces prestressing force in the concrete component of moulding.
The high strong flexor ratio reinforcing bar of above-mentioned another kind of heat treatment is opened the method for using of anchor clamps earlier; May further comprise the steps: 1) assembling fixture at first; To be installed in the taper hole of anchor ring through three intermediate plates of O RunddichtringO assembling; Again spring and gland are screwed in anchor ring, and boss low on the gland is got in the convex bayonet socket block, anchor clamps are assembled; 2) reinforcing bar is penetrated elder generation and open in the crossbeam of pedestal end, the anchor ring of anchor clamps that will assemble again awl mouthful end is inserted in from the external part of reinforcing bar, and presses close to elder generation and open pedestal end crossbeam, and this end is fixed as fixed end; Adopt same procedure, the stretch-draw end that another anchor clamps is inserted in reinforcing bar is also fixing; 3) with the stretch-draw end of tensioning equipment tension reinforcing steel bar to predetermined value, spring can advance intermediate plate automatically, makes in its taper hole that reliably is anchored at anchor ring; 4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar, the screen resilience of reinforcing bar just produces prestressing force in the concrete component of moulding.
The present invention is owing to take above technical scheme; It has the following advantages: 1, the present invention since be provided with one have a taper hole anchor ring; And in taper hole, be provided with three intermediate plates that are mutually 120 ° that connect by the O RunddichtringO; And be provided with thread at each said intermediate plate inwall, therefore can realize well the anchoring of high strong flexor ratio reinforcing bar when carrying out stretch-draw.2, the present invention is that γ and tooth are selected and cooperation apart from the reasonable range of t owing in three intermediate plates, adopting angle, forward position β, addendum angle, has guaranteed the degree of depth that the thread tooth embeds the high strong flexor ratio reinforcing bar of heat treatment, and anchoring property is reliable; Efficiency of anchorage is high, can satisfy the intermediate plate anchoring voluntarily of following up, and the needs of stripped thread do not take place; Also be convenient to the high strong flexor ratio reinforcing bar of heat treatment repeatedly during stretch-draw; Three intermediate plates unclamp, and the high strong flexor ratio reinforcing bar of heat treatment is withdrawed from, and have good loose anchor performance; Can prevent again simultaneously that the thread tooth from nipping causes the high strong flexor ratio reinforcing bar of heat treatment premature failure deeply.3, the present invention is owing to a horn-like opening is set in the intermediate plate entrance; And selected the angular aperture θ of opening and Rational Parameters that conical surface length is l to cooperate; Not only can prevent the phenomenon that the high strong flexor ratio reinforcing bar of heat treatment is crushed or bites broken in the intermediate plate entrance takes place when stretch-draw, can also guarantee the good static load performance of anchor clamps effectively and be repeatedly used performance.4, the present invention is owing to the taper hole afterbody at anchor ring is provided with a spring and a gland; Three intermediate plates receive certain roof pressure power when therefore making operation; Three intermediate plate follow-ups well guaranteed that anchor clamps to the clamping reliably of the high strong flexor ratio reinforcing bar of heat treatment, guarantee that anchor clamps have reliably from the anchor performance when stretch-draw loaded.5, the present invention is owing to be provided with the convex bayonet socket in the end of straight hole; And be provided with low high two boss with the convex bayonet fittings in the gland end; Therefore when operation; Can also be very beneficial for the use repeatedly of anchor clamps of the present invention simultaneously through promoting and rotating gland and realize quick chucking of the present invention or dismounting.The present invention is easy to install, can be widely used in the prestressed concrete pre-tensioned method work progress of building field.
Description of drawings
Fig. 1 is a configuration diagram of the present invention
Fig. 2 is an anchor ring structural representation of the present invention
Fig. 3 is three intermediate plate combining structures of the present invention sketch map
Fig. 4 is that sketch map is looked on the right side of Fig. 3
Fig. 5 is an intermediate plate inwall thread structural representation of the present invention
Fig. 6 is embodiments of the invention 2 configuration diagram
Fig. 7 is the embodiment of the invention 2 anchor ring structural representations
Fig. 8 is that sketch map is looked on the left side of Fig. 7
Fig. 9 is a gland structure sketch map of the present invention
Figure 10 is that sketch map is looked on the right side of Fig. 9
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Embodiment 1:
Like Fig. 1, shown in Figure 2, present embodiment comprises a cylindrical shape anchor ring 1, and anchor ring 1 internal diameter is a taper hole 2, coning angle 2 α of taper hole 2=14 °, and coning angle can change in 11 °～15 °.Be provided with three intermediate plates 4 (like Fig. 3, shown in Figure 4) that are mutually 120 ° that are used to clamp reinforcing bar 3 in the taper hole 2; The coning angle of three intermediate plate 4 male cone (strobilus masculinus)s after the combination than the coning angle of taper hole 2 big by 5 '～30 '; The stub end outer wall of three intermediate plates 4 after the combination is provided with a circle groove 5, is provided with an O RunddichtringO 6 (as shown in Figure 1) that three intermediate plates 4 are linked into an integrated entity in the groove 5.As shown in Figure 5, all be provided with thread 7 on three intermediate plate 4 inwalls, thread 7 radial section indentions; The addendum angle of thread 7 is γ, and 76 °≤γ≤78 °, the angle, forward position of thread 7 is β; 69 °≤β≤71 °, the tooth distance of thread 7 is t, 0.75 millimeter≤t≤1.25 millimeters.Angle, forward position β, addendum angle γ and the thread of thread 7 can increase frictional force apart from choose reasonable and the cooperation of t, prevents that intermediate plate 4 from skidding off.In order to make reinforcing bar 3 do not crushed or bite broken, and guarantee good static load performance and be repeatedly used performance that intermediate plate 4 microcephalies after combination hold inwall to be provided with imperial palace toy trumpet shape opening 8 outside a section, the angular aperture of opening 8 is θ, 6 °≤θ≤8 °; The length of opening 8 parts is l, 7 millimeters≤l≤10 millimeters.
When present embodiment uses (as shown in Figure 1): may further comprise the steps
1) at first reinforcing bar 3 being penetrated elder generation opens in the pedestal end crossbeam 17; Taper hole 2 small ends with the anchor ring 1 of anchor clamps are inserted in from reinforcing bar 3 one end terminations again; And press close to elder generation and open pedestal end crossbeam 17; Three intermediate plates, 4 little head ends that then will be through O RunddichtringO 6 assembling are inserted in from the external part of reinforcing bar 3, and are installed in the taper hole 2 of anchor ring 1; The method of the other end sectional fixture of reinforcing bar 3 is identical with said method;
2) knock the stub end of three intermediate plates 4 of the fixed end of reinforcing bar 3 with hammer, make the clamp reinforcing bar 3 of this end;
3) with the stretch-draw end of jack or other special equipment tension reinforcing steel bar 3 to predetermined value;
4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar 3, the screen resilience of reinforcing bar 3 just produces prestressing force in the concrete component of moulding.
Embodiment 2:
As shown in Figure 6, present embodiment comprises a cylindrical shape anchor ring 9, is provided with one section taper hole 10 and one section straight hole 11 that links to each other with taper hole 10 in the anchor ring 9.Be provided with three convex bayonet sockets 12 (like Fig. 7, shown in Figure 8) that are mutually 120 ° in the port of straight hole 11; In taper hole 10, also be provided with three identical with embodiment 1 intermediate plates 4 that are mutually 120 °; Stub end outer wall at three intermediate plates 4 is provided with groove 5, is provided with O RunddichtringO 6 in the groove 5.End at the stub end of three intermediate plates 4 is provided with a spring 13; The other end at spring 13 is provided with a gland 14; The port of gland 14 be provided with three pairs with anchor ring 9 on the boss 15,16 (like Fig. 9, shown in Figure 10) that cooperates of convex bayonet socket 12, and each to boss 15,16 be one high, one is low.During use; Spring 13 is pressed into gland 14 chuckings, and the two is connected in one, and promotes spring 13 forward with gland 14 and gets into anchor ring 9; Rotate gland 14; Boss low on the gland 14 16 is got in the convex bayonet sockets 12 block, high boss 15 can only block and leaned against convex bayonet socket 12 edges this moment, played the positioning action that stops gland 14 to be rotated further.During clamper for disassembling, promote spring 13 forward with gland 14, the backward rotation gland 14 again, make gland 14 and spring 13 withdraw from anchor ring 9 together.
In the foregoing description, some design features on three intermediate plates 4 are all identical with embodiment 1 with various parameter range, repeat no more at this.
When present embodiment uses (as shown in Figure 6): may further comprise the steps:
1) assembling fixture at first will be installed in the taper hole 10 of anchor ring 9 through three intermediate plates 4 of O RunddichtringO 6 assemblings, again spring 13 and gland 14 is screwed in anchor rings 9, and boss low on the gland 14 16 is got in the convex bayonet sockets 12 block, anchor clamps are assembled;
2) reinforcing bar 3 is penetrated elder generation and open in the pedestal end crossbeam 17, the anchor ring awl mouth of the anchor clamps that assemble is held from the external part of reinforcing bar 3 be inserted in again, and press close to elder generation and open pedestal end crossbeam 17, this end is fixed as fixed end; Adopt same procedure, the stretch-draw end that another anchor clamps is inserted in reinforcing bar 3 is also fixing;
3) with the stretch-draw end of jack or other tensioning equipment tension reinforcing steel bar 3 to predetermined value, spring 13 can advance intermediate plate 4 automatically, makes in its taper hole that reliably is anchored at anchor ring 9 10;
4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar 3, the screen resilience of reinforcing bar 3 just produces prestressing force in the concrete component of moulding.
Above-mentioned each embodiment only is used to explain the present invention, and wherein the structure of each parts, connected mode etc. all can change to some extent, and every equivalents of on the basis of technical scheme of the present invention, carrying out and improvement all should not got rid of outside protection scope of the present invention.
Claims (10)
1. the high strong flexor ratio reinforcing bar of heat treatment is opened anchor clamps earlier; It is characterized in that: it comprises the cylindrical shape anchor ring; Said anchor ring internal diameter is a taper hole; Be provided with three intermediate plates that are mutually 120 ° in the said taper hole, the stub end outer wall of said intermediate plate is provided with groove, is provided with an O RunddichtringO that three said intermediate plates are linked into an integrated entity in the said groove; Each said intermediate plate inwall is provided with thread, said thread radial section indention.
2. the high strong flexor ratio reinforcing bar of a kind of heat treatment as claimed in claim 1 is opened anchor clamps earlier; It is characterized in that: the coning angle of the taper hole that said anchor ring is inner is 11 °～15 °, and the coning angle of three said intermediate plate male cone (strobilus masculinus)s after the combination than the taper hole coning angle on the said anchor ring big by 5 '～30 '.
3. the high strong flexor ratio reinforcing bar of a kind of heat treatment as claimed in claim 1 is opened anchor clamps earlier, and it is characterized in that: the addendum angle of said thread is γ, 76 °≤γ≤78 °; The angle, forward position of thread is β; 69 °≤β≤71 °, the tooth distance of thread is t, 0.75 millimeter≤t≤1.25 millimeters.
4. the high strong flexor ratio reinforcing bar of a kind of heat treatment as claimed in claim 2 is opened anchor clamps earlier, and it is characterized in that: the addendum angle of said thread is γ, 76 °≤γ≤78 °; The angle, forward position of thread is β; 69 °≤β≤71 °, the tooth distance of thread is t, 0.75 millimeter≤t≤1.25 millimeters.
5. open anchor clamps earlier like claim 1 or the high strong flexor ratio reinforcing bar of 2 or 3 or 4 described a kind of heat treatments, it is characterized in that: the microcephaly of said intermediate plate holds endoporus to be provided with one section horn-like opening that outer imperial palace is little.
6. the high strong flexor ratio reinforcing bar of a kind of heat treatment as claimed in claim 5 is opened anchor clamps earlier, and it is characterized in that: the angular aperture of said opening is θ, 6 °≤θ≤8 °; The length of opening is l, 7 millimeters≤l≤10 millimeters.
7. open anchor clamps earlier like claim 1 or the high strong flexor ratio reinforcing bar of 2 or 3 or 4 or 6 described a kind of heat treatments, it is characterized in that: the taper hole afterbody in the said anchor ring is provided with one section straight hole again, and the port of said straight hole is provided with three convex bayonet sockets that are mutually 120 °; Be provided with a spring in the said straight hole; Afterbody at said spring is provided with a gland, and said gland is provided with three pairs of boss with the convex bayonet fittings of said straight hole, and each height to said boss is a height; One is low; During each low said boss location, be fastened in the convex bayonet socket of a said straight hole, and high said boss card leans against the edge of said convex bayonet socket.
8. the high strong flexor ratio reinforcing bar of a kind of heat treatment as claimed in claim 5 is opened anchor clamps earlier, it is characterized in that: the taper hole afterbody in the said anchor ring is provided with one section straight hole again, and the port of said straight hole is provided with three convex bayonet sockets that are mutually 120 °; Be provided with a spring in the said straight hole; Afterbody at said spring is provided with a gland, and said gland is provided with three pairs of boss with the convex bayonet fittings of said straight hole, and each height to said boss is a height; One is low; During each low said boss location, be fastened in the convex bayonet socket of a said straight hole, and high said boss card leans against the edge of said convex bayonet socket.
9. open the method for using of anchor clamps like the high strong flexor ratio reinforcing bar of each described a kind of heat treatment of claim 1～6 earlier, may further comprise the steps:
1) reinforcing bar being penetrated elder generation opens in the crossbeam of pedestal end; Taper hole small end with an anchor clamps anchor ring is inserted in from reinforcing bar one end termination again; And press close to elder generation and open pedestal end crossbeam; To be inserted in from the external part of reinforcing bar through three little head ends of intermediate plate of O RunddichtringO assembling then, and be installed in the taper hole of anchor ring as fixed end; The employing same procedure is installed, and another anchor clamps is installed in the stretching end of reinforcing bar;
2) knock the stub end of three intermediate plates of reinforcing bar fixed end with hammer, make the clamp reinforcing bar of this end;
3) with the stretch-draw end of tensioning equipment tension reinforcing steel bar to predetermined value;
4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar, the screen resilience of reinforcing bar just produces prestressing force in the concrete component of moulding.
10. like the method for using of claim 7 or the high strong flexor ratio reinforcing bar of 8 a described a kind of heat treatments elder generation anchor clamps, may further comprise the steps:
1) assembling fixture at first will be installed in the taper hole of anchor ring through three intermediate plates of O RunddichtringO assembling, again spring and gland is screwed in anchor ring, and makes in the boss entering convex bayonet socket low on the gland and block, and anchor clamps are assembled;
2) reinforcing bar is penetrated elder generation and open in the crossbeam of pedestal end, the anchor ring of anchor clamps that will assemble again awl mouthful end is inserted in from the external part of reinforcing bar, and presses close to elder generation and open pedestal end crossbeam, and this end is fixed as fixed end; Adopt same procedure, the stretch-draw end that another anchor clamps is inserted in reinforcing bar is also fixing;
3) with the stretch-draw end of tensioning equipment tension reinforcing steel bar to predetermined value, spring can advance intermediate plate automatically, makes in its taper hole that reliably is anchored at anchor ring;
4) formerly open fluid concrete in the pedestal, after concrete curing reaches design code intensity, put a reinforcing bar, the screen resilience of reinforcing bar just produces prestressing force in the concrete component of moulding.
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| CN2011102234679A CN102359231A (en) | 2011-08-05 | 2011-08-05 | Heat treatment high-yield-ratio steel bar pre-tensioning clamp and using method thereof |
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| CN2011102234679A CN102359231A (en) | 2011-08-05 | 2011-08-05 | Heat treatment high-yield-ratio steel bar pre-tensioning clamp and using method thereof |
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| CN102359231A true CN102359231A (en) | 2012-02-22 |
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| 濮小龙 吴秋英编: "《预应力张拉工艺（第4版）》", 30 November 1991, article "先张法" * |
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