CN217581293U - Secondary tensioning and releasing device for prestressed steel strands - Google Patents
Secondary tensioning and releasing device for prestressed steel strands Download PDFInfo
- Publication number
- CN217581293U CN217581293U CN202220855507.5U CN202220855507U CN217581293U CN 217581293 U CN217581293 U CN 217581293U CN 202220855507 U CN202220855507 U CN 202220855507U CN 217581293 U CN217581293 U CN 217581293U
- Authority
- CN
- China
- Prior art keywords
- steel
- frame base
- jack
- bearing pedestal
- steel frame
- 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.)
- Active
Links
Images
Landscapes
- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
The utility model discloses a secondary tensioning and releasing device of prestressed steel strands, which comprises an anchorage device, a steel frame base, a rectangular bearing pedestal, a telescopic steel component, a force sensor, a stress comprehensive tester, a feed-through jack and an oil pump station; the steel frame base and the rectangular bearing pedestal are arranged in a front-back collinear front-back manner, the steel strand penetrates through the longitudinal centers of the steel frame base and the rectangular bearing pedestal and then is fixed with the feed-through jack, and the feed-through jack is connected with the oil pump station through an oil pipe; an anchorage device is arranged outside the penetrating end corresponding to the steel frame base on the steel strand, a telescopic steel component, a force sensor and an anchorage device are sequentially arranged outside the penetrating end corresponding to the steel frame base, the force sensor is arranged between the outer side of the penetrating end corresponding to the rectangular bearing pedestal and the penetrating jack, and a data wire of the force sensor is connected to a stress comprehensive tester. The operation is convenient, the precision is high, and the economic cost is substantial; the secondary accurate compensation tensioning and releasing problems of the steel strand are effectively solved.
Description
Technical Field
The utility model relates to a secondary stretch-draw of prestressing force steel strand wires and put a device.
Background
After the steel strand is stretched for the first time, the prestress loss is serious due to the compression and rebound of the anchorage device and the slippage of the steel strand and the clamping piece, and the specified target control force cannot be achieved. In recent years, the traditional secondary tension compensation method is difficult to control prestress with high precision, and the process is complex.
The traditional releasing and tensioning process of the prestressed steel strand is generally that after a part of length is reserved by a feed-through jack, the steel strand is slowly pressurized until a clamping piece loosens, then the clamping piece is pushed backwards by a tool, and the operation is repeatedly carried out until the steel strand is released and tensioned.
The sheet releasing mode has the following problems:
(1) The clip piece is only manually drawn by a tool to move, so that the operation is very inconvenient;
(2) When the prestress is large, the anchor device and the clamping piece are too tight to be used for pulling out the clamping piece by the anchor withdrawing device
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure easy operation just can carry out the secondary stretch-draw of the prestressing force steel strand wires of precision high control and put a device.
The utility model provides a secondary tensioning and releasing device of prestressed steel strand, which comprises an anchorage device, a steel frame base, a rectangular bearing pedestal, a telescopic steel component, a force sensor, a stress comprehensive tester, a feed-through jack and an oil pump station; the steel frame base and the rectangular bearing pedestal are arranged in a front-back collinear front-back manner, the steel strand penetrates through the longitudinal centers of the steel frame base and the rectangular bearing pedestal and then is fixed with the feed-through jack, and the feed-through jack is connected with the oil pump station through an oil pipe; an anchorage device is arranged outside the penetrating end corresponding to the steel frame base on the steel strand, a telescopic steel component, a force sensor and an anchorage device are sequentially arranged outside the penetrating end corresponding to the steel frame base, the force sensor is arranged between the outer side of the penetrating end corresponding to the rectangular bearing pedestal and the penetrating jack, and a data wire of the force sensor is connected to a stress comprehensive tester.
In one embodiment of the above device, the steel frame base is a long strip structure, and the cross section of the rectangular bearing pedestal is the same as that of the steel frame base.
In an embodiment of the above device, the steel frame base includes two L-shaped side plates symmetrically arranged and two connecting plates fixed at both ends thereof, the central positions of the two connecting plates are respectively provided with a circular hole having a diameter larger than the outer diameter of the steel strand, and a reinforcing plate is arranged between the horizontal edges of the two L-shaped side plates.
In an embodiment of the above device, the rectangular bearing pedestal includes two rectangular side plates and a yoke plate fixed at their outer ends, and a circular hole with a diameter larger than the outer diameter of the steel strand is provided at the central position of the yoke plate.
In one embodiment of the above device, the telescopic steel member comprises an internally threaded sleeve and T-shaped screws symmetrically connected at two ends of the internally threaded sleeve, and the thread directions of two end sections of the internally threaded sleeve are opposite; the axial center of the T-shaped screw is provided with a steel strand mounting hole.
In an embodiment of the above device, a force transmission plate is disposed between the force sensor outside the rectangular bearing pedestal and the through jack.
The utility model discloses with the one end anchor of steel strand wires at the one end of steel frame base, only need pass through the punching type jack stretch-draw to the one end of installing force transducer and scalable steel member during stretch-draw, respectively prevent when opening when the secondary stretch-draw, only need to install rectangle load pedestal and another force transducer in the outside that the stretch-draw end of steel strand wires corresponds the steel frame base, through punching type jack stretch-draw can. The device structure and the tensioning operation are simple. And the rectangular bearing pedestal, the force sensor and the like can be repeatedly utilized to stretch and draw the plurality of steel strands. In addition, because only one end is subjected to secondary tensioning and releasing, the problem of asynchronous force transmission at two ends can be avoided. Summarizing, this device uses through the scalable steel member cooperation ground tackle of the stretch-draw end installation at steel strand wires and force sensor, with the steel strand wires in the one end anchor of steel frame base, carries out stretch-draw through the other end of feed-through jack to steel strand wires, through the accurate control of oil pump machine station to jack pressure, has following advantage: convenient operation, high precision and low cost; the device can be widely used for high-precision tension tests of steel strands and treatment of the problem of releasing and tensioning the steel strands after the tests are finished; the problem of the accurate supplementary stretch-draw of secondary of steel strand wires and put a is effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is an enlarged schematic structural view of the retractable steel member in the present embodiment.
Detailed Description
As shown in fig. 1 to 3, the prestressed steel strand secondary tensioning and releasing device disclosed in this embodiment includes a steel frame base 1, an anchorage device 3, a telescopic steel member 4, a force sensor 5, a stress comprehensive tester 6, a rectangular bearing pedestal 7, a prestressed through jack 8, and an oil pump station 9.
The steel frame base 1 is of a long strip-shaped structure and comprises two L-shaped plates which are symmetrically arranged and connecting plates fixed at two ends of the L-shaped plates, a plurality of reinforcing plates are arranged between horizontal edges of the two L-shaped plates, and round holes with diameters larger than the diameters of the steel strands are arranged at the central positions of the connecting plates.
The anchor 3 is an existing clip type anchor.
The telescopic steel member 4 comprises a threaded sleeve and T-shaped screws symmetrically connected with two ends of the threaded sleeve, the thread directions of two end sections of the internally threaded sleeve are opposite, and the T-shaped screws are rotated to realize the extension or the reduction of the length of the whole member. The axial center of the T-shaped screw is provided with a steel strand mounting hole.
The rectangular bearing pedestal 7 comprises two rectangular side plates and a yoke plate fixed at the outer ends of the two rectangular side plates, and a circular hole with the diameter larger than the outer diameter of the steel strand is arranged at the central position of the yoke plate.
The working process of the device is as follows:
when the steel strand is stretched for the first time, the steel strand passes through the yoke plate of the steel frame base 1, the anchorage device 3 is connected on the outer side of the corresponding anchoring end, the telescopic steel component 4 and the force sensor 5 are connected on the outer side of the corresponding penetrating end, and the data wire of the force sensor 5 is connected to the stress comprehensive tester 6. And then fixing the tensioning end of the steel strand with a through jack 8, connecting the through jack 8 with an oil pump station through an oil pipe, tensioning the tensioning end of the steel strand through the through jack 8, and controlling the force through kilonewton force displayed by a force sensor in a comprehensive tester to achieve a primary tensioning prestress control value. The force transmission path is the tension end anchorage device, the force sensor, the telescopic steel member and the steel frame base.
When the steel strand needs to be subjected to secondary compensation tensioning, the tensioning end of the steel strand 2 penetrates through the rectangular bearing pedestal 7, the inner end of the rectangular bearing pedestal 7 is in contact with the penetrating end of the steel frame base 1, the steel strand is connected with a force sensor 5, the outer side of the force sensor 5 is provided with a force transmission plate, the outer side of the force transmission plate is connected with a penetrating jack 8, the data wire of the force sensor is connected with a comprehensive tester and then is tensioned again, the force application is stopped after a target value is reached, and the force transmission path is the force sensor, the rectangular bearing pedestal and the steel frame. And (3) as the steel strand is elongated, a gap is formed between the screw rod at the inner end of the telescopic steel component and the steel frame base, the T-shaped screw rod at the side is twisted and screwed by a spanner, the jack, the bearing pedestal and the sensor are taken out after the jack is returned with oil, and secondary tensioning is completed.
When the steel strand needs to be released, the stress application is stopped after the tension force exceeds the prestress value of the existing steel strand by referring to the operation of secondary compensation tension, the T-shaped screws on the two sides of the loosened telescopic steel member are twisted oppositely to be closed, the jack returns oil, the steel strand retracts at the moment, and the release tension is completed.
This device uses through the scalable steel member cooperation ground tackle of the stretch-draw end installation at steel strand wires and force sensor, with the steel strand wires at the one end anchor of steel frame base, carries out stretch-draw through the other end of punching type jack to steel strand wires, through the accurate control of oil pump machine station to jack pressure, has following advantage:
convenient operation, high precision and low cost; the device can be widely used for high-precision tension tests of steel strands and treatment of the problem of releasing and tensioning of the steel strands after the tests are finished, and the device can be repeatedly used; because only two stretch-draws and put at one end, the problem of asynchronous power transmission at two ends can not occur, and the problem of secondary accurate compensation stretch-draw and put of steel strand is effectively solved.
Claims (6)
1. The utility model provides a secondary stretch-draw of prestressing force steel strand and put a device, includes the ground tackle, its characterized in that: the device also comprises a steel frame base, a rectangular bearing pedestal, a telescopic steel component, a force sensor, a comprehensive stress tester, a feed-through jack and an oil pump station; the steel frame base and the rectangular bearing pedestal are arranged in a front-back collinear front-back manner, the steel strand penetrates through the longitudinal centers of the steel frame base and the rectangular bearing pedestal and then is fixed with the feed-through jack, and the feed-through jack is connected with the oil pump station through an oil pipe; an anchorage device is arranged outside the penetrating end corresponding to the steel frame base on the steel strand, a telescopic steel component, a force sensor and an anchorage device are sequentially arranged outside the penetrating end corresponding to the steel frame base, the force sensor is arranged between the outer side of the penetrating end corresponding to the rectangular bearing pedestal and the penetrating jack, and a data wire of the force sensor is connected to a stress comprehensive tester.
2. The secondary tensioning and releasing device for prestressed steel strands as claimed in claim 1, wherein: the steel frame base is of a long strip-shaped structure, and the cross section size of the rectangular bearing pedestal is the same as that of the steel frame base.
3. The secondary tensioning and releasing device for prestressed steel strands as claimed in claim 2, wherein: the steel frame base comprises two L-shaped side plates which are symmetrically arranged and connecting plates of which the two ends are fixed, round holes of which the diameters are larger than the outer diameter of the steel strand are respectively arranged at the central positions of the two connecting plates, and a reinforcing plate is arranged between the horizontal edges of the two L-shaped side plates.
4. The secondary tensioning and releasing device for prestressed steel strands as claimed in claim 2, wherein: the rectangular bearing pedestal comprises two rectangular side plates and a yoke plate fixed at the outer ends of the two rectangular side plates, and a circular hole with the diameter larger than the outer diameter of the steel strand is arranged at the central position of the yoke plate.
5. The secondary tensioning and releasing device for prestressed steel strands as claimed in claim 1, wherein: the telescopic steel member comprises an internal thread sleeve and T-shaped screws symmetrically connected with two ends of the internal thread sleeve, and the thread directions of two end sections of the internal thread sleeve are opposite; the axial center of the T-shaped screw is provided with a steel strand mounting hole.
6. The secondary tensioning and releasing device for prestressed steel strands as recited in claim 1, wherein: and a force transmission plate is arranged between the force sensor on the outer side of the rectangular force bearing pedestal and the feed-through jack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220855507.5U CN217581293U (en) | 2022-04-13 | 2022-04-13 | Secondary tensioning and releasing device for prestressed steel strands |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220855507.5U CN217581293U (en) | 2022-04-13 | 2022-04-13 | Secondary tensioning and releasing device for prestressed steel strands |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217581293U true CN217581293U (en) | 2022-10-14 |
Family
ID=83540611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220855507.5U Active CN217581293U (en) | 2022-04-13 | 2022-04-13 | Secondary tensioning and releasing device for prestressed steel strands |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217581293U (en) |
-
2022
- 2022-04-13 CN CN202220855507.5U patent/CN217581293U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109653531B (en) | External prestress steel strand connector and matched tensioning device | |
| CN103556785A (en) | Retraction compensating type nut clamping piece anchor as well as anchor tensioning method | |
| CN211401921U (en) | Anchor rod drawing device | |
| CN206158201U (en) | It contracts to pace up and down can dismantle gripper type ground tackle device | |
| CN217581293U (en) | Secondary tensioning and releasing device for prestressed steel strands | |
| CN209760863U (en) | External prestress steel strand connector and matched tensioning device | |
| CN110793854B (en) | Indoor drawing test device suitable for extensible constant-resistance anchor rod and test method thereof | |
| CN201024591Y (en) | Stretching compensation bracing strut device | |
| CN112392041A (en) | Tensioning device for insufficient reserved length of steel strand and application method thereof | |
| CN109773947B (en) | Steel wire rubber strip winding pipe with prestressed tendon hole forming function and use method | |
| CN201972410U (en) | Integrated tool anchor | |
| CN109098095B (en) | Auxiliary equipment for preventing reinforcing steel bar stress loss for beam making | |
| CN113374177B (en) | Anchor device | |
| CN207761302U (en) | One kind can be used in turn anchor pole tension tool | |
| CN207418179U (en) | A kind of preceding card punching bridge prestress stretch-draw jack | |
| CN214737422U (en) | Steel strand secondary tensioning tool | |
| CN113309361B (en) | Prestressed automatic tensioning anchoring equipment and tensioning method | |
| CN210439165U (en) | Prestressed carbon fiber tensioning device | |
| CN210946868U (en) | Connector for threaded steel bar and prestressed tendon | |
| CN204575310U (en) | Presstressed reinforcing steel porous anchor assembly static test pre-tightening apparatus | |
| CN201162311Y (en) | Clip type anchorage used for carbon fiber reinforced polymeric material pre-stress tendon | |
| CN203486838U (en) | Prestress tension jack | |
| CN109764845B (en) | Front end steel strand displacement detection device based on reverse pulling method | |
| CN221372956U (en) | Prestressed steel strand stretching auxiliary device | |
| CN110700095A (en) | Stay cable anchoring traction device of large-span cable-stayed bridge and traction construction method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |