CN103321431B - Rebar tensioner - Google Patents
Rebar tensioner Download PDFInfo
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- CN103321431B CN103321431B CN201310254412.3A CN201310254412A CN103321431B CN 103321431 B CN103321431 B CN 103321431B CN 201310254412 A CN201310254412 A CN 201310254412A CN 103321431 B CN103321431 B CN 103321431B
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- reinforcing bar
- hexagonal prism
- endoporus
- positive hexagonal
- sleeve
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Abstract
The present invention relates to a kind of rebar tensioner, comprise the screwed positive hexagonal prism sleeve of size two, snap bolt connecting two sleeves, the bar connecting nut of all attacking screw thread in the same way inside and outside, two supplementary anchorage nuts applying stretching force for jack.The present invention, by the entire length of a snap bolt telescopic adjustment stretcher that can slide in large sleeve, makes sleeve can connect two fixing reinforcing bars, by jack Shi Hanzhang, coordinates spanner to screw sleeve and makes reinforcing bar tensioning.This stretcher is mainly used in the displacement of reinforced concrete beam type works maintenance and reinforcement project reinforcing bar, use this stretcher that reinforcing bar can be made to be in tensioning state, recover the due initial stress of raw steel muscle, ensure that works can not occur crack after stressed too early, improve maintenance and reinforcement construction quality, make handling safety, simple, quick, the present invention has simple and reasonable, the advantages such as applicable narrow space construction, assists without the need to main equipment, easy to use.
Description
Technical field
The present invention relates to a kind of rebar tensioner, belong to the pre-stress construction field of civil engineering, replace reinforcing bar in especially a kind of reinforced concrete beam maintenance and reinforcement construction, after making displacement, reinforcing bar tensioning recovers the device of raw steel muscle initial stress.
Technical background
, there is corrosion and destruction in the reinforced concrete beam type structure in reinforced concrete beam type structure, especially marine environment, need on-call maintenance to reinforce after destruction under chloride permeability effect, and the reinforcing bar that wherein after corrosion, remaining cross-section amasss less than 80% requires to change.Because reinforced concrete beam is from the existence of gravidity weight, there is initial stress in original reinforcing bar, but change reinforcing bar and no matter adopt welding, or other mechanical connections all cannot recover the initial stress changing rear reinforcing bar, common pre-stress construction equipment cannot be implemented in narrow space, and after maintenance, works carries again, and new reinforcing bar is in relaxed state, works crack is easily caused to reappear, the application life after impact maintenance.
Generally be difficult to after pretensioned prestressing corrosion of steel bar in addition recover, current specifications needs to scrap process usually, and mainly in prior art, prestressed reinforcement is difficult to change, and cannot implement the reasons such as stretch-draw cause for the prestressed reinforcement after replacing.
Therefore be badly in need of one to apply in narrow space, simple to operate, the reinforcing bar tensioning apparatus of reinforcing bar initial stress can be recovered.
Summary of the invention
In order to solve above-mentioned practical problem, overcome in prior art the problem being difficult to recover new reinforcing bar initial stress or the Shi Hanzhang difficulty changed in the construction of reinforced concrete structure maintenance and reinforcement or increase, there is provided a kind of simple and reasonable, rebar tensioner easy to use.
To achieve these goals, present invention employs following technical scheme: a kind of rebar tensioner, it comprises
One for connecting the little positive hexagonal prism sleeve 1 of the first reinforcing bar, and described little positive hexagonal prism sleeve 1 is provided with hole wall and attacks threaded endoporus 5 in the one end with the first bar connecting, the other end on the other side is provided with hole wall and attacks threaded endoporus 6, and
One for connecting the large positive hexagonal prism sleeve 3 of the second reinforcing bar, and described large positive hexagonal prism sleeve 3 has the reducing inner chamber axially run through, and
One is axially connected between large and small positive hexagonal prism sleeve for realizing the round end connecting bolt 2 of stretcher length adjustment, described round end connecting bolt 2 is made up of the larger head of diameter and the less key of diameter, described head has smooth outer wall, outer diameter is more smaller than the large footpath section diameter of large positive hexagonal prism sleeve 3 reducing inner chamber and be greater than the path section inner diameter of reducing inner chamber, described key outer wall has attacked screw thread, described round end connecting bolt inserts from the bigger diameter end of described reducing inner chamber and passes miner diameter end, is threaded with endoporus 6; And
To lay respectively at outside large and small positive hexagonal prism sleeve two and the supplementary anchorage nut 14,11 on the second reinforcing bar and the first reinforcing bar that is tightened, described supplementary anchorage nut 14,11 is fixed in Special jack fixture.Apply stretching force by jack pair reinforcing bar, then screw small sleeve, the object of reinforcing bar tensioning can be realized.
Described rebar tensioner also comprises a bar connecting nut 4, described bar connecting nut is hollow cylinder, its outer wall and inwall attack the identical screw thread in direction, the large footpath section inwall 8 of described large positive hexagonal prism sleeve 3 reducing inner chamber attacks internal thread and identical with the outer wall thread of described bar connecting nut 4, and the inner thread of bar connecting nut is identical with the screw thread of the second reinforcing bar outer wall.
Described little positive hexagonal prism sleeve 1 is positive hexagonal prism, endoporus 5 and 6 is mutual disconnected blind hole, and endoporus 5 and 6 inwall attacks the contrary screw thread in direction respectively, can tighten two ends screw thread simultaneously, namely one of them hole inwall attacks clockwise thread, another blind hole inside fire attack anti-clockwise thread.
The hand of spiral of described round end connecting bolt 2 key and endoporus 6 are in the same way.
Large footpath section inwall 8 hand of spiral of described large positive hexagonal prism sleeve 3 reducing inner chamber is identical with the hand of spiral of round end connecting bolt 2 key, and while ensureing to tighten small sleeve, large sleeve does not get loose.
Described first reinforcing bar 9 end becomes straight thread 10 by the rolled thread of stripping rib, and straight thread length and endoporus 5 deep equality, hand of spiral is identical with endoporus 5 hand of spiral.
The present invention, by the entire length of a snap bolt telescopic adjustment stretcher that can slide in large sleeve, makes sleeve can connect two fixing reinforcing bars, by jack Shi Hanzhang, coordinates spanner to screw sleeve and makes reinforcing bar tensioning.This stretcher is mainly used in the displacement of reinforced concrete beam type works maintenance and reinforcement project reinforcing bar, use this stretcher that reinforcing bar can be made to be in tensioning state, recover the due initial stress of raw steel muscle, ensure that works can not occur crack after stressed too early, improve maintenance and reinforcement construction quality, make handling safety, simple, quick, the present invention has simple and reasonable, the advantages such as applicable narrow space construction, assists without the need to main equipment, easy to use.
Accompanying drawing explanation
Fig. 1 overall structure schematic diagram of the present invention;
Fig. 2 decomposition texture schematic diagram of the present invention.
Little positive hexagonal prism sleeve 1, round end connecting bolt 2, large positive hexagonal prism sleeve 3, bar connecting nut 4, endoporus 5, endoporus 6, reducing inner chamber 7, large footpath section 7.1, path section 7.2, inwall 8, the first reinforcing bar 9, straight thread 10, supplementary anchorage nut 11, second reinforcing bar 12, straight thread 13, supplementary anchorage nut 14
Detailed description of the invention
Below in conjunction with concrete accompanying drawing and embodiment, the invention will be further described
As shown in Figures 1 and 2, a kind of rebar tensioner, comprises little positive hexagonal prism sleeve 1, round end connecting bolt 2, large positive hexagonal prism sleeve 3, bar connecting nut 4, and supplementary anchorage nut 11,14.
Little positive hexagonal prism sleeve 1 is positive hexagonal prism, and spanner can be adopted to screw, and its two ends are drilled with endoporus 5 and 6, and wherein endoporus 5 is comparatively dark, more shallow for connecting the first reinforcing bar 9, Inner hole 6, for connecting round end connecting bolt 2.In order to tighten two ends screw thread simultaneously, offense is to contrary screw thread respectively for endoporus 5 and endoporus 6 inwall, and namely one of them hole inwall attacks clockwise thread, another blind hole inside fire attack anti-clockwise thread.Endoporus 5 and endoporus 6 are mutual disconnected blind hole.
Large positive hexagonal prism sleeve 3 is positive hexagonal prism, and spanner can be adopted to screw.Large positive hexagonal prism sleeve 3 has the reducing inner chamber 7 axially run through, and large footpath section 7.1 opening is towards the second reinforcing bar 12, and its inwall 8 has attacked screw thread; Path section 7.2 opening, towards the first reinforcing bar 9, is the circular hole of inner wall smooth.Round end connecting bolt 2 is connected between the two, for realizing stretcher length adjustment along the axis direction of large and small positive hexagonal prism sleeve.Round end connecting bolt 2 is made up of the larger head 2.1 of diameter and the less key 2.2 of diameter, head 2.2 is for having the cylindrical shape of smooth outer wall, and its outer diameter is more smaller than large footpath section 7.1 diameter of large positive hexagonal prism sleeve 3 reducing inner chamber and be greater than path section 7.2 inner diameter of reducing inner chamber.Round end connecting bolt 2 inserts from large footpath section opening, and key 2.2 passes path section opening, thus round end connecting bolt 2 can freely be slided among the reducing inner chamber of large positive hexagonal prism sleeve 3, can not come off again from path section 7.2.Key 2.2 outer wall has attacked screw thread, identical with endoporus 6 hand of spiral, and while ensureing to tighten small sleeve, large sleeve does not get loose.
Bar connecting nut 4 is hollow cylinder, and inner and outer wall all attacks the identical screw thread in direction, and hand of spiral is identical with inwall 8 hand of spiral.Bar connecting nut 4 is connected to large positive hexagonal prism sleeve 3 inwall by external screw thread.
As shown in Figure 1, as a kind of embodiment, little positive hexagonal prism sleeve 1 is threaded connection the first reinforcing bar 9, and wherein the first reinforcing bar 9 end becomes straight thread 10 by the rolled thread of stripping rib, and reach equals endoporus 5 degree of depth, and hand of spiral is identical with endoporus 5 hand of spiral.
Bar connecting nut 4 is threaded connection the second reinforcing bar 12, wherein the second reinforcing bar 12 end becomes straight thread 13 by the rolled thread of stripping rib, reach is greater than the gross thickness of bar connecting nut 4 and auxiliary hold-down nut, and hand of spiral is identical with bar connecting nut 4 hand of spiral.Large positive hexagonal prism sleeve 3 is connected with bar connecting nut 4 by screw thread.
Supplementary anchorage nut 11,14 is fixed in Special jack fixture, by jack tension both sides reinforcing bar Shi Hanzhang to design load.Little positive hexagonal prism sleeve 1 is tightened by spanner, with the fixing large positive hexagonal prism sleeve 3 of another spanner, makes the first reinforcing bar 9 and the second reinforcing bar 12 tensioning, screws supplementary anchorage nut 11,14, prevent from getting loose.
Rebar tensioner uses step as follows:
1. measure replaced rebar sizes, new reinforcing bar cuts, and one end of two new reinforcing bars is shelled rib rolled thread respectively and become straight thread.
2. excise former corrosion reinforcing bar, end stays the unattacked reinforcing bar of sufficient length to carry out bar connecting, and new reinforcing bar can adopt welding or other mechanical joining methods to connect reliably.
3. round end connecting bolt inserted in large sleeve and pass from bottom small sircle hole, then screwing in the shallow blind hole of small sleeve.
4. auxiliary hold-down nut is screwed in reinforced bar straight thread, then a reinforcing bar screws in bar connecting nut wherein.
5., first in the large sleeve of round end connecting bolt indentation, then to the external screw thread of good bar connecting nut, connecting reinforcement attaching nut and large sleeve, move to prevent bar connecting nut and can first fix with auxiliary hold-down nut.
6. extend round end connecting bolt, connect small sleeve and another reinforcing bar.
7. with the auxiliary hold-down nut of special fixture clamping, utilize jack to apply stretching force, reinforcing bar extends, and makes round end connecting bolt again in the large sleeve of retraction, rotates small sleeve until round end connecting bolt head holds out against large sleeve bottom with spanner.
8. jack oil return, unloads jack and fixture, completes stretch-draw operation, tightens auxiliary hold-down nut, utilizes the principle of double nut to prevent screw from getting loose, and after concreting is fixing, system complete stability no longer relaxes.
When practical application, must ensure that reinforcing bar firmly welds or positive mechanical connects, prevent contingency.Should apply tension stress according to design calculated value, consider bolt mismachining tolerance simultaneously, there will be rational stress loss after unloading, ultra stretching a little during stretch-draw, be rotated with rear unloading, the strain detecting that adopts with good conditionsi accurately controls stretching construction.
Claims (5)
1. a rebar tensioner, is characterized in that: comprise
One for connecting the little positive hexagonal prism sleeve (1) of the first reinforcing bar, described little positive hexagonal prism sleeve (1) is provided with hole wall and attacks threaded endoporus A (5) in the one end with the first bar connecting, the other end on the other side is provided with hole wall and attacks threaded endoporus B (6), and
One for connecting the large positive hexagonal prism sleeve (3) of the second reinforcing bar, described large positive hexagonal prism sleeve (3) has the reducing inner chamber axially run through, the path section opening of reducing inner chamber is towards the first reinforcing bar and inner wall smooth, large footpath section opening is towards the second reinforcing bar and inwall has attacked screw thread, and
One is axially connected to greatly, for realizing the round end connecting bolt (2) of stretcher length adjustment between little positive hexagonal prism sleeve, described round end connecting bolt (2) is made up of the larger head of diameter and the less key of diameter, described head has smooth outer wall, outer diameter is more smaller than the large footpath section diameter of large positive hexagonal prism sleeve (3) reducing inner chamber and be greater than the path section inner diameter of reducing inner chamber, described key outer wall has attacked screw thread, described round end connecting bolt inserts from the bigger diameter end of described reducing inner chamber and passes miner diameter end, be threaded with endoporus B (6), and
One bar connecting nut (4), described bar connecting nut is hollow cylinder, its outer wall and inwall attack the identical screw thread in direction, the outer wall thread of bar connecting nut (4) is identical with the large footpath section inner thread of large positive hexagonal prism sleeve reducing inner chamber, and the inner thread of bar connecting nut (4) is identical with the screw thread of the second reinforcing bar outer wall; And
To lay respectively at outside large and small positive hexagonal prism sleeve two and the supplementary anchorage nut be tightened on the second reinforcing bar and the first reinforcing bar, described supplementary anchorage nut is fixed in Special jack fixture.
2. rebar tensioner according to claim 1, it is characterized in that: described little positive hexagonal prism sleeve (1) is positive hexagonal prism, endoporus A (5) and endoporus B (6) is mutual disconnected blind hole, and endoporus A (5) and endoporus B (6) inwall attack the contrary screw thread in direction respectively.
3. rebar tensioner according to claim 1, is characterized in that: the hand of spiral of described round end connecting bolt (2) key and the hand of spiral of endoporus B (6) are in the same way.
4. rebar tensioner according to claim 1, is characterized in that: large footpath section inwall (8) hand of spiral of described large positive hexagonal prism sleeve (3) reducing inner chamber is identical with the hand of spiral of round end connecting bolt (2) key.
5. rebar tensioner according to claim 2, it is characterized in that: described first reinforcing bar (9) end becomes straight thread (10) by the rolled thread of stripping rib, straight thread length and endoporus A (5) deep equality, hand of spiral is identical with endoporus A (5) hand of spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310254412.3A CN103321431B (en) | 2013-06-24 | 2013-06-24 | Rebar tensioner |
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| CN201310254412.3A CN103321431B (en) | 2013-06-24 | 2013-06-24 | Rebar tensioner |
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| CN103321431A CN103321431A (en) | 2013-09-25 |
| CN103321431B true CN103321431B (en) | 2015-09-16 |
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| CN108221716A (en) * | 2018-02-10 | 2018-06-29 | 深圳市市政设计研究院有限公司 | A kind of tensioning equipment and its method for stretching of accurate control prestress value |
| CN108360755A (en) * | 2018-04-10 | 2018-08-03 | 四川林彬彬装配式建筑科技有限公司 | A kind of reinforced concrete column joint reinforcing bar connection structure |
| CN110952717A (en) * | 2018-09-26 | 2020-04-03 | 深圳天安骏业投资发展(集团)有限公司 | Prestressed steel section beam and ultrathin sandwich floor system applying same |
| CN110485561A (en) * | 2019-07-15 | 2019-11-22 | 武汉理工大学 | A kind of bolt connection node and its construction method of adjustable prefabricated components length |
| WO2021243414A1 (en) * | 2020-06-03 | 2021-12-09 | Richardson, Wayne Arnold | A coupler assembly |
| CN113116582B (en) * | 2021-04-17 | 2023-06-20 | 中国人民解放军空军特色医学中心 | Support frame for oral cavity |
| CN113202232A (en) * | 2021-05-20 | 2021-08-03 | 班升诚业科技(上海)有限公司 | Mechanical connection and installation method for steel bars |
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| JP2004300836A (en) * | 2003-03-31 | 2004-10-28 | Shimizu Corp | Mechanical reinforcement joint and tension introduction method of reinforcement |
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| CN102926508A (en) * | 2012-11-20 | 2013-02-13 | 中国水电顾问集团中南勘测设计研究院 | Constructional reinforcement stress coupling connector and method for connecting and continuously monitoring constructional reinforcement stress |
| CN203531409U (en) * | 2013-06-24 | 2014-04-09 | 中交四航工程研究院有限公司 | Tensioner for steel bars |
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2013
- 2013-06-24 CN CN201310254412.3A patent/CN103321431B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| GB2166830A (en) * | 1984-10-31 | 1986-05-14 | Paul Francis Hope | Concrete reinforcement couplers |
| JP2004300836A (en) * | 2003-03-31 | 2004-10-28 | Shimizu Corp | Mechanical reinforcement joint and tension introduction method of reinforcement |
| CN102605901A (en) * | 2012-04-05 | 2012-07-25 | 江苏金砼预制装配建筑发展有限公司 | Reinforcing steel bar assembly type structural reinforcing steel bar for building, connecting head part molding method and connecting head part molding mold |
| CN102926508A (en) * | 2012-11-20 | 2013-02-13 | 中国水电顾问集团中南勘测设计研究院 | Constructional reinforcement stress coupling connector and method for connecting and continuously monitoring constructional reinforcement stress |
| CN203531409U (en) * | 2013-06-24 | 2014-04-09 | 中交四航工程研究院有限公司 | Tensioner for steel bars |
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| CN103321431A (en) | 2013-09-25 |
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