CN203531409U - Tensioner for steel bars - Google Patents
Tensioner for steel bars Download PDFInfo
- Publication number
- CN203531409U CN203531409U CN201320364376.1U CN201320364376U CN203531409U CN 203531409 U CN203531409 U CN 203531409U CN 201320364376 U CN201320364376 U CN 201320364376U CN 203531409 U CN203531409 U CN 203531409U
- Authority
- CN
- China
- Prior art keywords
- reinforcing bar
- hexagonal prism
- endoporus
- positive hexagonal
- tensioner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model relates to a tensioner for steel bars. The tensioner comprises two regular hexagonal prism body sleeves with threads, a cheese bolt connected with the two sleeves, a steel bar connection nut with co-directional threads inside and outside and two auxiliary anchoring nuts used for applying tensioning force of a jack. The overall length of the tensioner is telescopically adjusted by the cheese bolt capable of sliding in a large sleeve so that two fixed steel bars can be connected by the sleeves. Pre-stressing force is applied by the jack and the sleeves are tightly screwed by a wrench so that steel bars are tensioned. The tensioner for the steel bars has following beneficial effects: the tensioner is mostly applied to displacement of the steel bars in a maintenance and reinforcement project of a reinforced concrete girder type structure; by adoption of the tensioner, the steel bars can be in a tensioning state, initial stresses of the original steel bars are recovered; cracks are not produced prematurely after force is borne on the structure; maintenance and reinforcement construction qualities are enhanced so that the operation is safe, simple and rapid; and the tensioner is simple and reasonable in structure and convenient to use and is suitable for construction in narrow space without large-scale auxiliary equipment.
Description
Technical field
The utility model relates to a kind of reinforcing bar stretcher, belongs to the pre-stress construction field of civil engineering, in especially a kind of reinforced concrete beam maintenance and reinforcement construction, replaces reinforcing bar, makes to replace the device that rear reinforcing bar tensioning recovers former reinforcing bar initial stress.
Background technology
, 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 wherein after corrosion, the long-pending reinforcing bar below 80% of remaining cross-section requires to change.Due to the existence of reinforced concrete beam from 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 to change the initial stress of 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, easily cause works crack to reappear, the application life after impact maintenance.
After pretensioned prestressing corrosion of steel bar, be generally difficult in addition recover, current specifications need to be scrapped processing conventionally, is mainly that in prior art, prestressed reinforcement is difficult to change, and cannot implement the reasons such as stretch-draw for the prestressed reinforcement after changing and cause.
Therefore be badly in need of a kind of can applying in narrow space, simple to operate, can recover the reinforcing bar tensioning apparatus of reinforcing bar initial stress.
Utility model content
In order to solve above-mentioned practical problem, overcome in prior art and be difficult to recover change or the new reinforcing bar initial stress increasing or the problem that applies prestressing force difficulty in the construction of reinforced concrete structure maintenance and reinforcement, a kind of simple and reasonable, easy to use reinforcing bar stretcher is provided.
To achieve these goals, the utility model has adopted following technical scheme: a kind of reinforcing bar stretcher, 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 the first endoporus 5 in the one end being connected with the first reinforcing bar, and the other end on the other side is provided with hole wall and attacks threaded the second 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 running 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 consists of the larger head of diameter and the less key of diameter, described head has smooth outer wall, outer diameter is more smaller and be greater than the path section inner diameter of reducing inner chamber than the large footpath section diameter of large positive hexagonal prism sleeve 3 reducing inner chambers, described key outer wall has been attacked screw thread, described round end connecting bolt inserts and passes miner diameter end from the bigger diameter end of described reducing inner chamber, is threaded with the second endoporus 6; And
Second auxiliary anchoring nut the 14, the first auxiliary anchoring nut 11 that lays respectively at large and small positive hexagonal prism sleeve two outsides and be tightened on the second reinforcing bar and the first reinforcing bar, the described second auxiliary anchoring nut 14 and the first auxiliary anchoring nut 11 are fixed in Special jack fixture.By jack pair reinforcing bar, apply stretching force, then screw small sleeve, can realize the object of reinforcing bar tensioning.
Described reinforcing bar stretcher also comprises a reinforcing bar attaching nut 4, described reinforcing bar attaching nut is hollow cylinder, its outer wall attacks with inwall the screw thread that direction is identical, the large footpath section inwall 8 of described large positive hexagonal prism sleeve 3 reducing inner chambers is attacked internal thread and identical with described reinforcing bar attaching nut's 4 outer wall thread, and reinforcing bar attaching nut's inner thread is identical with the screw thread of the second reinforcing bar outer wall.
Described little positive hexagonal prism sleeve 1 is positive hexagonal prism, the first endoporus 5 and the second endoporus 6 are mutual disconnected blind hole, the first endoporus 5 and the second endoporus 6 inwalls are attacked respectively the screw thread of opposite direction, to can tighten two ends screw thread simultaneously, be that one of them hole inwall is attacked clockwise screw thread, the counterclockwise screw thread of another blind hole inside fire attack.
The hand of spiral of described round end connecting bolt 2 keys and the second endoporus 6 are in the same way.
Large footpath section inwall 8 hand of spirals of described large positive hexagonal prism sleeve 3 reducing inner chambers are identical with the hand of spiral of round end connecting bolt 2 keys, and when guaranteeing to tighten small sleeve, large sleeve does not get loose.
Described the first reinforcing bar 9 ends become straight thread 10 by the rolled thread of stripping rib, straight thread length and the first endoporus 5 deep equalities, and hand of spiral is identical with the first endoporus 5 hand of spirals.
The utility model, 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, applies prestressing force, 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 can make reinforcing bar in tensioning state, recover the due initial stress of former reinforcing bar, guarantee that works can not occur crack after stressed too early, improve maintenance and reinforcement construction quality, make handling safety, simple, quick, the utlity model has simple and reasonable, the advantages such as applicable narrow space construction, assists without main equipment, easy to use.
Accompanying drawing explanation
Fig. 1 the utility model overall structure schematic diagram;
Fig. 2 the utility model decomposition texture schematic diagram.
Little positive hexagonal prism sleeve 1, round end connecting bolt 2, large positive hexagonal prism sleeve 3, reinforcing bar attaching nut 4, the first endoporus 5, the second endoporus 6, reducing inner chamber 7, large footpath section 7.1, path section 7.2, inwall 8, the first reinforcing bars 9, straight thread 10, the first auxiliary anchoring nut 11, the second reinforcing bar 12, the auxiliary anchoring nut 14 of straight thread 13, the second
The specific embodiment
Below in conjunction with concrete accompanying drawing and embodiment, the utility model is described in further detail
As shown in Figures 1 and 2, a kind of reinforcing bar stretcher, comprises little positive hexagonal prism sleeve 1, round end connecting bolt 2, large positive hexagonal prism sleeve 3, reinforcing bar attaching nut 4, and first auxiliary anchoring nut the 11, second auxiliary anchoring nut 14.
Little positive hexagonal prism sleeve 1 is positive hexagonal prism, can adopt spanner to screw, and its two ends are drilled with the first endoporus 5 and the second endoporus 6, and wherein the first endoporus 5 is darker, more shallow for connecting the first reinforcing bar 9, the two Inner holes 6, for connecting round end connecting bolt 2.In order to tighten two ends screw thread simultaneously, the first endoporus 5 and the second endoporus 6 inwalls are attacked respectively the screw thread of opposite direction, and one of them hole inwall is attacked clockwise screw thread, the counterclockwise screw thread of another blind hole inside fire attack.The first endoporus 5 and the second endoporus 6 are mutual disconnected blind hole.
Large positive hexagonal prism sleeve 3 is positive hexagonal prism, can adopt spanner to screw.Large positive hexagonal prism sleeve 3 has the reducing inner chamber 7 axially running through, and large footpath section 7.1 openings are towards the second reinforcing bar 12, and its inwall 8 has been attacked screw thread; Path section 7.2 openings, towards the first reinforcing bar 9, are the circular hole of inner wall smooth.Round end connecting bolt 2 is connected between the two along the axis direction of large and small positive hexagonal prism sleeve, for realizing stretcher length adjustment.Round end connecting bolt 2 consists 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 and be greater than path section 7.2 inner diameters of reducing inner chamber than large footpath section 7.1 diameters of large positive hexagonal prism sleeve 3 reducing inner chambers.Round end connecting bolt 2 inserts from large footpath section opening, and key 2.2 passes path section opening, thereby round end connecting bolt 2 can freely be slided among the reducing inner chamber of large positive hexagonal prism sleeve 3, can from path section 7.2, not come off again.Key 2.2 outer walls have been attacked screw thread, identical with the second endoporus 6 hand of spirals, and when guaranteeing to tighten small sleeve, large sleeve does not get loose.
Reinforcing bar attaching nut 4 is hollow cylinder, and inner and outer wall is all attacked the screw thread that direction is identical, and hand of spiral is identical with inwall 8 hand of spirals.Reinforcing bar attaching nut 4 is connected in large positive hexagonal prism sleeve 3 inwalls 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 ends become straight thread 10 by the rolled thread of stripping rib, reach equals first endoporus 5 degree of depth, and hand of spiral is identical with the first endoporus 5 hand of spirals.
Reinforcing bar attaching nut 4 is threaded connection the second reinforcing bar 12, wherein the second reinforcing bar 12 ends become straight thread 13 by the rolled thread of stripping rib, reach is greater than the gross thickness of reinforcing bar attaching nut 4 and auxiliary hold-down nut, and hand of spiral is identical with reinforcing bar attaching nut 4 hand of spirals.Large positive hexagonal prism sleeve 3 is connected with reinforcing bar attaching nut 4 by screw thread.
First auxiliary anchoring nut the 11, second auxiliary anchoring nut 14 is fixed in Special jack fixture, by jack tension both sides reinforcing bar, applies prestressing force to design load.Little positive hexagonal prism sleeve 1 can be 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 tensionings, screws first auxiliary anchoring nut the 11, second auxiliary anchoring nut 14, prevents from getting loose.
Reinforcing bar stretcher uses step as follows:
1. measure replaced rebar sizes, new reinforcing bar cuts, and one end of two new reinforcing bars is shelled respectively rib rolled thread and become straight thread.
2. excise former corrosion reinforcing bar, end stays the unattacked reinforcing bar of sufficient length to carry out reinforcing bar connection, and new reinforcing bar can adopt welding or other mechanical connection method to connect reliably.
3. round end connecting bolt inserted in large sleeve and passed from bottom small sircle hole, then screwing in the shallow blind hole of small sleeve.
4. auxiliary hold-down nut is screwed in to reinforced bar straight thread, then on a reinforcing bar, screw in reinforcing bar attaching nut therein.
5. first in the large sleeve of round end connecting bolt indentation, the external screw thread to good reinforcing bar attaching nut then, connecting reinforcement attaching nut and greatly sleeve, can first fix with auxiliary hold-down nut in order to prevent that reinforcing bar attaching nut from moving.
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, with spanner rotation small sleeve until round end connecting bolt head holds out against large sleeve bottom.
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 that screw from getting loose, and after concreting is fixing, system complete stability no longer relaxes.
When practical application, must guarantee 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, during stretch-draw, super a little stretch-draw, is rotated with rear unloading, and the strain detecting that adopts with good conditionsi is accurately controlled stretching construction.
Claims (6)
1. a reinforcing bar stretcher, 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 in the one end being connected with the first reinforcing bar and attacks threaded the first endoporus (5), the other end on the other side is provided with hole wall and attacks threaded the second 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 running through, and
One is axially connected in greatly, between little positive hexagonal prism sleeve for realizing the round end connecting bolt (2) of stretcher length adjustment, described round end connecting bolt (2) consists of the larger head of diameter and the less key of diameter, described head has smooth outer wall, outer diameter is more smaller and be greater than the path section inner diameter of reducing inner chamber than the large footpath section diameter of large positive hexagonal prism sleeve (3) reducing inner chamber, described key outer wall has been attacked screw thread, described round end connecting bolt inserts and passes miner diameter end from the bigger diameter end of described reducing inner chamber, be threaded with the second endoporus (6), and
The the second auxiliary anchoring nut (14), the first auxiliary anchoring nut (11) that lay respectively at large and small positive hexagonal prism sleeve two outsides and be tightened on the second reinforcing bar and the first reinforcing bar, the described second auxiliary anchoring nut (14) and the first auxiliary anchoring nut (11) are fixed in Special jack fixture.
2. reinforcing bar stretcher according to claim 1, it is characterized in that: described reinforcing bar stretcher also comprises a reinforcing bar attaching nut (4), described reinforcing bar attaching nut is hollow cylinder, its outer wall attacks with inwall the screw thread that direction is identical, the large footpath section inwall (8) of described large positive hexagonal prism sleeve (3) reducing inner chamber is attacked internal thread and identical with described reinforcing bar attaching nut's (4) outer wall thread, and reinforcing bar attaching nut's inner thread is identical with the screw thread of the second reinforcing bar outer wall.
3. reinforcing bar stretcher according to claim 1, it is characterized in that: described little positive hexagonal prism sleeve (1) is positive hexagonal prism, the first endoporus (5) and the second endoporus (6) are mutual disconnected blind hole, and the first endoporus (5) and the second endoporus (6) inwall are attacked respectively the screw thread of opposite direction.
4. reinforcing bar stretcher according to claim 1, is characterized in that: the hand of spiral of described round end connecting bolt (2) key and the second endoporus (6) are in the same way.
5. reinforcing bar stretcher according to claim 2, 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.
6. reinforcing bar stretcher according to claim 3, it is characterized in that: described the first reinforcing bar (9) end becomes straight thread (10) by the rolled thread of stripping rib, straight thread length and the first endoporus (5) deep equality, hand of spiral is identical with the first endoporus (5) hand of spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320364376.1U CN203531409U (en) | 2013-06-24 | 2013-06-24 | Tensioner for steel bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320364376.1U CN203531409U (en) | 2013-06-24 | 2013-06-24 | Tensioner for steel bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203531409U true CN203531409U (en) | 2014-04-09 |
Family
ID=50417633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320364376.1U Expired - Fee Related CN203531409U (en) | 2013-06-24 | 2013-06-24 | Tensioner for steel bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203531409U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321431A (en) * | 2013-06-24 | 2013-09-25 | 中交四航工程研究院有限公司 | Rebar tensioner |
| CN107297613A (en) * | 2016-04-15 | 2017-10-27 | 中国石油天然气股份有限公司 | Mounting tool and compressor |
-
2013
- 2013-06-24 CN CN201320364376.1U patent/CN203531409U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321431A (en) * | 2013-06-24 | 2013-09-25 | 中交四航工程研究院有限公司 | Rebar tensioner |
| CN103321431B (en) * | 2013-06-24 | 2015-09-16 | 中交四航工程研究院有限公司 | Rebar tensioner |
| CN107297613A (en) * | 2016-04-15 | 2017-10-27 | 中国石油天然气股份有限公司 | Mounting tool and compressor |
| CN107297613B (en) * | 2016-04-15 | 2024-04-30 | 中国石油天然气股份有限公司 | Mounting tool and compressor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103321431B (en) | Rebar tensioner | |
| US10612241B2 (en) | Apparatus for prestressing concrete floor of inclined shaft wall | |
| CN205400024U (en) | Instrument formula external scaffolding bolt that can dismantle used repeatedly links wall spare | |
| CN105442760A (en) | Steel bar connection mode used for connection among prefabricated reinforced concrete members | |
| CN203531409U (en) | Tensioner for steel bars | |
| JP6501219B2 (en) | Brace with tension adjustment | |
| CN102852284A (en) | Taper-sleeve locking-type steel bar connection joint | |
| CN201539046U (en) | Right-and-left threaded coupling sleeve of steel bar | |
| CN112302001A (en) | Rapid pile splicing device for steel reinforcement cage and using method of rapid pile splicing device | |
| CN103498536A (en) | Extruding taper sleeve locking-type steel bar joint and method for connecting steel bars by using same | |
| CN204425900U (en) | Be convenient to the Anti-drop hoe changing hoe handle | |
| CN206957265U (en) | A kind of angle steel reinforced structure of concrete column | |
| CN203821869U (en) | Safety protection device for building construction hole | |
| CN203891453U (en) | Steel tube scaffold fastener with plum-headed bolts | |
| CN203320428U (en) | Novel reinforcing device of reinforced concrete bridge and bridge deck | |
| CN208089737U (en) | A kind of nut and its fastening structure with self-locking function | |
| CN201474302U (en) | Combined water-proof bolt of construction form erecting system | |
| CN203742072U (en) | Compression rod with adjustable length for self-balancing pre-stressed cable strut grid structure | |
| CN201933698U (en) | Steel bar connecting sleeve | |
| CN201704797U (en) | Device for high-strength bolt slanting wedge load | |
| CN206769427U (en) | A kind of reinforced steel beam and girder for the prefabricated components that are open | |
| CN214272406U (en) | Energy-saving steel structure unit | |
| CN210066501U (en) | Auxiliary device for bridge plate prestressed steel strand tensioning construction | |
| CN211597395U (en) | Civil air defense wallboard tie bar | |
| CN201255166Y (en) | Torsional shear type high-strength bolt for steel structure |
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: 20140409 Termination date: 20170624 |