CN101967885B - Prestressed reinforcing steel tensioning equipment - Google Patents
Prestressed reinforcing steel tensioning equipment Download PDFInfo
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- CN101967885B CN101967885B CN 201010291770 CN201010291770A CN101967885B CN 101967885 B CN101967885 B CN 101967885B CN 201010291770 CN201010291770 CN 201010291770 CN 201010291770 A CN201010291770 A CN 201010291770A CN 101967885 B CN101967885 B CN 101967885B
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- wedge
- logical heart
- reinforcing steel
- screw rod
- presstressed reinforcing
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Abstract
The invention relates to prestressed structure engineering equipment in construction, in particular to prestressed reinforcing steel tensioning equipment, which comprises a bracket with a loop, a through screw movably arranged in the bracket through the loop, a first jacking and pressing device provided with an inner screw hole, a clamping mechanism for clamping prestressed reinforcing steel and arranged at one end of the through screw, a second jacking and pressing device sleeved at one end of the through screw and a fixing mechanism, wherein the second jacking and pressing device is provided with an inner screw hole; the inner wall of the inner screw hole of the second jacking and pressing device is provided with inner threads matched with the threads of the through screw; and the fixing mechanism is arranged at one end of the bracket close to a building and is used for fixing the prestressed reinforcing steel. The equipment has a simple structure and low cost, is light and convenient to carry and is suitable for tensioning the prestressed reinforcing steel in a narrow space.
Description
Technical field
The present invention relates to a kind of prestressed structure part engineering equipment for engineering construction, especially relate to a kind of presstressed reinforcing steel tension equipment.
Background technology
In engineering construction, need to adopt presstressed reinforcing steel, such as reinforcing bar, steel strand come the prestressing force of building is designed; Usually can use the presstressed reinforcing steel tension equipment, such as jack, come presstressed reinforcing steel is carried out tension, adopt ground tackle to come the presstressed reinforcing steel after the tension is fixed, thereby can obtain needed prestressing force; Ground tackle is headed into from the mouth of pipe that is arranged with presstressed reinforcing steel, formation is to the clamping of presstressed reinforcing steel, thereby reach the purpose of fixing described presstressed reinforcing steel, yet after presstressed reinforcing steel is fixed, when removing this presstressed reinforcing steel tension equipment, this presstressed reinforcing steel all can have an amount of recovery usually, thereby, prestressing force can lose because of the retraction of presstressed reinforcing steel, and this is because due to ground tackle fails sufficiently described presstressed reinforcing steel to be fixed to clamp.
Chinese patent CN2695428Y discloses a kind of front clamp type low expansion lifting jack, comprising the top-pressure mechanism that is used for the tension presstressed reinforcing steel, and presstressed reinforcing steel blocked prevents the ground tackle retaining mechanism that bounces back; Described top-pressure mechanism comprises fluid cylinder, the jack intermediate plate, the intermediate plate wedge, piston, the top pressure head, compression bar, and be located at spring between top pressure head and compression bar, with the retaining mechanism of being located at the outer ram outside, this jack can with prior art in the middle of high-pressure oil pump support the use, presstressed reinforcing steel is carried out tension, can push up pressure to ground tackle again, owing to adopt the mode of hydraulic pressure to carry out tension, can reach very large drawing tension, and because its pressure on top surface is also very large, thereby ground tackle can be headed in the mouth of pipe that is arranged with presstressed reinforcing steel with hanging down, play the good fixation of presstressed reinforcing steel, immediately after fixing, remove jack, can guarantee that also presstressed reinforcing steel and prestressing force satisfy the requirement of above-mentioned standard.
Yet, the tensioning device of above-mentioned employing hydraulic way, still existent defect: its structure is comparatively complicated, in order to obtain larger drawing tension, described fluid cylinder must have larger volume, and needs a larger compression pump to be mated use, therefore above-mentioned equipment volume is larger, and comparatively heavy, for the working environment of some narrow spaces, can't use this fluid pressure type tensioning device to carry out tension work.
Summary of the invention
For this reason, technical problem to be solved by this invention is to propose a kind of simple in structure, and volume is light and handy, is applicable to the presstressed reinforcing steel tension equipment in narrow and small tension space.
Presstressed reinforcing steel tension equipment of the present invention comprises a support, forms running-on on axially on the described support; Logical heart screw rod, described logical heart screw rod has relative support top pressure side with a relative support apart from the building far away tension end nearer apart from building, and described logical heart screw rod is located in the described support by activity by described running-on; The first jack unit, described the first jack unit are sheathed on described tension end place, and form inner bolt hole, form the internal thread that cooperatively interacts with described logical heart screw flight on the inwall of the described inner bolt hole of described the first jack unit; Clamping device, described clamping device are located on the described tension end of described logical heart screw rod, are used for clamping presstressed reinforcing steel, and described the first jack unit passes through to drive described logical heart screw rod to be realized described clamping device top is pressed, and closely realizes the tension to presstressed reinforcing steel; Also comprise, second jack unit is sheathed on the described top pressure side of described logical heart screw rod, described the second jack unit forms inner bolt hole, forms the internal thread that cooperatively interacts with described logical heart screw flight on the described inner bolt hole inwall of described the second jack unit.A fixed mechanism, described fixed mechanism are located at described support near an end of building, are used for fixedly presstressed reinforcing steel.
Above-mentioned presstressed reinforcing steel tension equipment, described clamping device comprises the bevelled clamping wedge of surface forming, with logical heart cover of wedge, the external diameter of the low end in described clamping wedge surface is less than the internal diameter of described logical heart cover of wedge, and the external diameter of the higher end in described clamping wedge surface is greater than the internal diameter of described logical heart cover of wedge, and the external diameter of described logical heart screw rod is greater than the internal diameter of described logical heart cover of wedge simultaneously.
Above-mentioned presstressed reinforcing steel tension equipment, also comprise the bevelled fixedly cover of wedge of surface forming, and fixed wedge, the external diameter of the low end in described fixed wedge surface is less than the internal diameter of described fixedly cover of wedge, and the external diameter of the higher end in described fixed wedge surface is greater than the internal diameter of described fixedly cover of wedge, and the external diameter of described logical heart screw rod is less than the internal diameter of described fixedly cover of wedge simultaneously.
Above-mentioned presstressed reinforcing steel tension equipment, described the first jack unit and described the second jack unit are nut.
Above-mentioned presstressed reinforcing steel tension equipment, the sidewall of the described tension end of described logical heart screw rod is provided with recess.
Above-mentioned presstressed reinforcing steel tension equipment has following advantage:
1. described presstressed reinforcing steel tension equipment comprises support, logical heart screw rod, and the first jack unit, the second jack unit, clamping device and fixed mechanism, it is simple in structure, and volume is light and handy, is highly suitable for the tension of the presstressed reinforcing steel that carries out in narrow and small tension space.
2. above-mentioned presstressed reinforcing steel tension equipment, described clamping device comprises that surface forming has the inclined-plane that clamping wedge is arranged, with logical heart cover of wedge, the external diameter of the low end in described clamping wedge surface is less than the internal diameter of described logical heart cover of wedge, and the external diameter of the higher end in described clamping wedge surface is greater than the internal diameter of described logical heart cover of wedge, and the external diameter of described logical heart screw rod is greater than the internal diameter of described logical heart cover of wedge simultaneously.In tention process, the prestressing force influential point of tendons that is positioned at described clamping wedge and logical heart cover of wedge is stated clamping by described clamping wedge and logical heart cover of wedge gradually, can realize better the tension to described presstressed reinforcing steel.
3. above-mentioned presstressed reinforcing steel tension equipment, the sidewall of the described tension end of described logical heart screw rod is provided with recess, can clamp described recess position with clamping device, thereby guarantee that better described logical heart screw rod can be with the first nut, or the rotation of the second nut and rotating, thereby realize tension to presstressed reinforcing steel.
For content of the present invention is more likely to be clearly understood, the below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation.
Fig. 1 is for using the presstressed reinforcing steel tension equipment that presstressed reinforcing steel is carried out the fixing schematic diagram of tension
Fig. 2 is the jagged presstressed reinforcing steel tension equipment of tool schematic diagram.
The 1-support, 2-leads to heart screw rod, 3-the first nut, 4-the second nut, 5-clamping device, 6-clamping wedge, 7-leads to heart cover of wedge, the 8-steel strand, and the 9-fixed head, the 10-fixed mechanism, 11-is cover of wedge fixedly, the 12-fixed wedge, 13-pad, 14-recess, 17-top pressure side, 18-tension end.
As shown in Figure 1, for using the presstressed reinforcing steel tension equipment presstressed reinforcing steel is carried out the fixing schematic diagram of tension, wherein the presstressed reinforcing steel tension equipment comprises a support 1, forms running-on (not marking) herein on axially on the described support 1; Logical heart screw rod 2 is located in the described support 1 by activity by described running-on, and described logical heart screw rod 2 has the relative described support 1 with of a relatively described support 1 top pressure side 17 nearer apart from building (not marking) the tension end 18 far away apart from building (not marking) herein herein; The first jack unit, be the first nut 3 in the present embodiment, be sheathed on described tension end 18 places, and form inner bolt hole (this lower place do not mark), form the internal thread that the screw thread with described logical heart screw rod 2 cooperatively interacts on the inwall of the described inner bolt hole of described the first nut 3; Clamping device 5, comprise that surface forming has the inclined-plane that clamping wedge 6 is arranged, with logical heart cover of wedge 7, the external diameter of the low end in described clamping wedge 6 surfaces is less than the internal diameter of described logical heart cover of wedge 7, and the external diameter of the higher end in described clamping wedge 6 surfaces is greater than the internal diameter of described logical heart cover of wedge 7, the external diameter of described logical heart screw rod 2 is greater than the internal diameter of described logical heart cover of wedge 7 simultaneously, described clamping device 5 is located on the described logical heart screw rod 2 tension ends 18, described the first nut 3 can be realized the top of described clamping device 5 is pressed by driving described logical heart screw rod 2, and then realizes the tension to presstressed reinforcing steel; Second jack unit is the second nut 4 in the present embodiment, is located on the top pressure side 17 of described logical heart screw rod 2, and described the second nut 4 forms inner bolt hole, forms the internal thread that the screw thread with described logical heart screw rod 2 cooperatively interacts on the described inner bolt hole inwall.Fixed mechanism 10 is located at described support 1 near an end of building, and described fixed mechanism 10 comprises fixed head 9, and fixedly cover of wedge 11, and fixed wedge 12; Pad 13 is located on the described fixed wedge 12, for cooperating with described the second nut 4 described fixed wedge 12 is headed into described fixedly cover of wedge 11.
Above-mentioned presstressed reinforcing steel tension equipment comes work by following process: sheathed successively as shown in Figure 1 on the presstressed reinforcing steel that at first stretches out in by building (being steel strand 8 in the present embodiment), fixed head 9, fixedly cover of wedge 11, fixed wedge 12, with pad 13, and then top pressure side 17 is provided with the second nut 4, the tension end is provided with the logical heart screw rod 2 of the first nut 3, with an integrated model that is configured to of being located on the described logical heart screw rod 2, be inserted in by described steel strand 8 top axial along described logical heart screw rod 2, and allow described steel strand 8 tops be stretched out by the tension end of described logical heart screw rod 2, and described support 1 top is pressed on the described fixed head 9, then described logical heart cover of wedge 7 and described clamping wedge 6 is sheathed on described steel strand 8 successively near on the end of described tension end 18.When the beginning tension, rotate described the first nut 3, fixed head 9 is pressed on described support 1 top; When support 1 is peaked at described fixed head 9 places and is rotated further the first nut 3, described the first nut 3 drives described logical heart screw rod 2 towards the direction of described logical heart cover of wedge 7, and to described logical heart cover of wedge 7 formation top pressures, because being subject to the top of described logical heart screw rod 2, logical heart cover of wedge 7 presses, can be to clamping wedge 6 motions, and described clamping wedge 6 is inserted in wherein, the special construction of clamping wedge 6 can be at logical heart cover of wedge 7 in the process of clamping wedge 6 motions, make described clamping wedge 6 progressively clamp described steel strand 8, until logical heart cover of wedge 7 is relative fixedly situation with the position of described clamping wedge 6 and steel strand 8; Need to continue rotation the first nut 3 this moment, described clamping device 5 can be under the driving of described logical heart screw rod 2 the described steel strand 8 of pulling, until with described steel strand be pulled to have predetermined prestressing force till, finish to stretch.
In order to allow described steel strand 8 continue to keep due prestressing force constant, need to fix described steel strand 8 before removing described presstressed reinforcing steel tension equipment this moment in advance, avoid its retraction; In order to achieve this end, can be with described the second nut 4 to described fixed mechanism 10 direction precessions, described the second nut 4 is pressed into described fixedly cover of wedge 11 by the pad 13 that is positioned at 12 of described the second nut 4 and described fixed wedge with described fixed wedge 12 tops, because the shape of described fixed wedge 12 is special, therefore can behind the cover of wedge 11 described steel strand 8 be clamped being pushed into fixedly, and it does not bounce back to fix assurance.Can remove other parts of the described presstressed reinforcing steel tension equipment except fixed mechanism 10 this moment.
Described presstressed reinforcing steel tension equipment comprises support, logical heart screw rod, and the first jack unit, the second jack unit, clamping device and fixed mechanism, it is simple in structure, and volume is light and handy, is highly suitable for the tension of the presstressed reinforcing steel that carries out in narrow and small tension space.
Above-mentioned presstressed reinforcing steel tension equipment, described clamping device comprises that surface forming has the inclined-plane that clamping wedge is arranged, with logical heart cover of wedge, the external diameter of the low end in described clamping wedge surface is less than the internal diameter of described logical heart cover of wedge, and the external diameter of the higher end in described clamping wedge surface is greater than the internal diameter of described logical heart cover of wedge, and the external diameter of described logical heart screw rod is greater than the internal diameter of described logical heart cover of wedge simultaneously.In tention process, the prestressing force influential point of tendons that is positioned at described clamping wedge and logical heart cover of wedge is clamped by described clamping wedge and described logical heart cover of wedge gradually, can realize better the tension to described presstressed reinforcing steel.
The difference of present embodiment and embodiment 1 only is that as shown in Figure 2, the outer wall of described logical heart screw rod 2 is provided with recess 14.Can use clamping device clamp such as spanner as described in recess 14 places of logical heart screw rod 2, this moment since logical heart screw rod 2 clamped by spanner, therefore can guarantee better that described logical heart screw rod 2 can be with the first nut 3, or the rotation of the second nut 4 and rotating, cause tension to realize.
[0027] obvious, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms according to varying in size of equipment on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (5)
1. a presstressed reinforcing steel tension equipment is characterized in that: comprise
A support forms running-on on axially on the described support;
Logical heart screw rod, described logical heart screw rod has relative support top pressure side with a relative support apart from the building far away tension end nearer apart from building, and described logical heart screw rod is located in the described support by activity by described running-on;
The first jack unit, described the first jack unit are located at described tension end place, and form inner bolt hole, form the internal thread that cooperatively interacts with described logical heart screw flight on the inwall of the described inner bolt hole of described the first jack unit;
Clamping device, described clamping device are located on the described tension end of described logical heart screw rod, are used for clamping presstressed reinforcing steel, and described the first jack unit passes through to drive described logical heart screw rod to be realized described clamping device top is pressed, and closely realizes the tension to presstressed reinforcing steel;
Also comprise, second jack unit is located on the described top pressure side of described logical heart screw rod, described the second jack unit forms inner bolt hole, forms the internal thread that cooperatively interacts with described logical heart screw flight on the described inner bolt hole inwall of described the second jack unit;
A fixed mechanism, described fixed mechanism are located at described support near an end of building, are used for fixedly presstressed reinforcing steel.
2. presstressed reinforcing steel tension equipment according to claim 1, it is characterized in that: described clamping device comprises the bevelled clamping wedge of surface forming, with logical heart cover of wedge, the external diameter of the low end in described clamping wedge surface is less than the internal diameter of described logical heart cover of wedge, and the external diameter of the higher end in described clamping wedge surface is greater than the internal diameter of described logical heart cover of wedge, and the external diameter of described logical heart screw rod is greater than the internal diameter of described logical heart cover of wedge simultaneously.
3. presstressed reinforcing steel tension equipment according to claim 1 and 2, it is characterized in that: described fixed mechanism comprises the bevelled fixedly cover of wedge of surface forming, and fixed wedge, the external diameter of the low end in described fixed wedge surface is less than the internal diameter of described fixedly cover of wedge, and the external diameter of the higher end in described fixed wedge surface is greater than the internal diameter of described fixedly cover of wedge, and the external diameter of described logical heart screw rod is less than the internal diameter of described fixedly cover of wedge simultaneously.
4. presstressed reinforcing steel tension equipment according to claim 3, it is characterized in that: described the first jack unit and described the second jack unit are nut.
5. presstressed reinforcing steel tension equipment according to claim 4, it is characterized in that: the sidewall of the described tension end of described logical heart screw rod is provided with recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010291770 CN101967885B (en) | 2010-09-26 | 2010-09-26 | Prestressed reinforcing steel tensioning equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010291770 CN101967885B (en) | 2010-09-26 | 2010-09-26 | Prestressed reinforcing steel tensioning equipment |
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| CN101967885A CN101967885A (en) | 2011-02-09 |
| CN101967885B true CN101967885B (en) | 2013-01-09 |
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| CN 201010291770 Active CN101967885B (en) | 2010-09-26 | 2010-09-26 | Prestressed reinforcing steel tensioning equipment |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105544989A (en) * | 2015-12-15 | 2016-05-04 | 天津银龙预应力材料股份有限公司 | Tension rod disassembling device |
| CN109093839B (en) * | 2018-08-10 | 2024-02-27 | 中国华西企业股份有限公司 | Prestressed rib stretching structure for prestressed floor slab |
| CN108943380B (en) * | 2018-09-28 | 2024-03-26 | 山东豪迈机械制造有限公司 | Locking device and prestressed reinforcement tensioning device |
| CN112458899A (en) * | 2020-04-03 | 2021-03-09 | 吕世宽 | Bridge prestress tensioning device |
| CN117027460B (en) * | 2023-09-06 | 2024-01-16 | 河北科技师范学院 | Steel plate shear wall positioning and connecting system in assembled building |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201874246U (en) * | 2010-09-26 | 2011-06-22 | 北京华泰天成科技发展有限公司 | Prestressed tendon tensioning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2094581U (en) * | 1990-11-27 | 1992-01-29 | 柳州市建筑机械总厂 | Inclined drawing chain group anchor set |
| JP2002180668A (en) * | 2000-12-13 | 2002-06-26 | Shinko Wire Co Ltd | Connection device for tendons for prestressed concrete and connection method for prestressed concrete block using the same |
| CN2576837Y (en) * | 2002-09-04 | 2003-10-01 | 柳州海威姆建筑机械有限公司 | Carbon-fier prestressed reinforcement anchoring apparatus |
| CN2695525Y (en) * | 2004-04-29 | 2005-04-27 | 深圳市海川实业股份有限公司 | Special anchoring device for |
| JP2006219912A (en) * | 2005-02-10 | 2006-08-24 | Anderson Technology Kk | Fixing structure between prestressing strand and socket, and device for press-fitting and fixing prestressing strand and wedge into socket |
| CN101781933B (en) * | 2010-03-29 | 2013-04-03 | 赵正义 | Structure and method for reducing steel bar stress in advance before tension withdrawal |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201874246U (en) * | 2010-09-26 | 2011-06-22 | 北京华泰天成科技发展有限公司 | Prestressed tendon tensioning device |
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