CN2384931Y - Flat-anchor front-retained lifting jack - Google Patents
Flat-anchor front-retained lifting jack Download PDFInfo
- Publication number
- CN2384931Y CN2384931Y CN 98212948 CN98212948U CN2384931Y CN 2384931 Y CN2384931 Y CN 2384931Y CN 98212948 CN98212948 CN 98212948 CN 98212948 U CN98212948 U CN 98212948U CN 2384931 Y CN2384931 Y CN 2384931Y
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- CN
- China
- Prior art keywords
- anchor
- flat
- arranged side
- stretch
- instrument
- 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
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Abstract
The utility model relates to a flat-anchor front clamping type lifting jack, which is characterized in that two lifting jacks are arranged in parallel, the front end point of the middle of two oil cylinders is provided with a front clamping assembly, and anchor devices arranged on the front clamping assembly are distributed in a single row shape. The oil cylinders of the two parallel lifting jacks are used to drive the front clamping assembly to do uniform motion outwards, and prestressing tendons are automatically clamped. The utility model has the advantages that the manufacturing procedure of the flat anchor devices is simplified, the multiple-hole integral bundle penetrating, spacing and tensioning actions are completed at one time, a plurality of prestressing tendons are stressed together, are tensioned simultaneously, and are anchored simultaneously, and the tensioning efficiency and quality and safety are improved.
Description
The utility model relates to cassette jack before a kind of flat anchor that uses in tensioning construction, be applicable to the flat type ground tackle of porous simultaneous tension in the prestressed hollow slab beam, can be widely used in the engineering such as prestressed reinforced concrete construction, member, bridge of posttension daraf(reciprocal of farad).
During prestress engineering is constructed at home at present, during with the hollow slab girder of porous ground tackle stretching method, engineering unit all is with one one ground stretch-draw of cassette jack before the 26T usually, the flat type ground tackle that for design the time was horizontal distribution originally is when one one ground stretch-draw, in order to make stretch-draw jack and steel strand not produce interference, the stretch-draw end face of flat type ground tackle will be designed to 1: 15 symmetric taper, so just increase the tooling cost of flat type ground tackle, reduce production efficiency.The flat type ground tackle of porous is on one one ground during stretch-draw, owing to be subjected to the influence of frictional resistance, stretch-draw jack frictional resistance and the oil pressure indicator reading collimation error in duct, the unbalanced stress that is easy to generate every prestressing tendon is even, if on a slice beam, pursue root stretch-draw, the cumulative stress error that then causes is just bigger, and the error that applies when certain a branch of or a certain stretching force greatly also can cause this sheet beam to produce twisted phenomena owing to strain differs.Adopt the technology of a stretch-draw to cause problems such as the stretch-draw number of times is frequent, the engineering time long, labor strength is big, inefficiency simultaneously.
The purpose of this utility model just provides a kind of top cover that need not add, can porous integral lashing, spacing, stretch-draw once finish, many stressed together, the anchorings simultaneously of prestressing tendon, make the beam distortion evenly, the stretch-draw time is shortened, efficient improves n doubly (n is the radical of tensioned prestressing bar), and the preceding cassette jack of light and handy easy flat anchor is installed.
Solution of the present utility model is such: in the utility model of being made up of oil cylinder 6, piston 7, bottom 5, loam cake 15 and front clip component, two group oil cylinders 6 and piston 7 are to be arranged side by side, thereby constitute two jacks arranged side by side, simultaneously ground tackle are carried out stretch-draw; Front clip component is installed in the middle front end place of two jacks arranged side by side, and the ground tackle on the front clip component is single-row shape and distributes.After taking above-mentioned measure, can utilize the oil cylinder of two jacks arranged side by side to drive the outside uniform movement of front clip component, the front clip component device clamps prestressing tendon automatically, the automatic loose tension prestress muscle of front clip component device when oil return, carry out a lashing of porous, automatic spacing clamping, Integratively stretch-draw by many steel strand on the front clip component, and the jack of need not worrying when stretch-draw can produce with strand interferes, flat type ground tackle also needn't design 1: 15 symmetric taper when design, directly be designed to the plane, reduced manufacturing procedure.
The utility model has the advantages that the manufacturing procedure that to simplify flat type ground tackle, can porous integral lashing, spacing, stretch-draw once finish, many prestressing tendons are stressed together, simultaneous tension, anchoring simultaneously, make the beam distortion evenly, the stretch-draw time shortens, install lightly easyly, improved stretch-draw efficient and quality, safe and reliable.
Accompanying drawing is embodiment of the present utility model
Accompanying drawing 1 is a schematic appearance of the present utility model
Accompanying drawing 2 is upward views of accompanying drawing 1
Accompanying drawing 3 is structural representations of the present utility model
Accompanying drawing 4 is that the utility model uses the mounting structure scheme drawing
The utility model is made up of oil pipe handle 1, oil nozzle joint 2, preceding connecting panel 3, back connecting panel 4, bottom 5, oil cylinder 6, piston 7 and front clip component, and front clip component includes spring perch 8, spring 9, spring housing 10, instrument intermediate plate 11, instrument anchor slab 12, moves back anchor core print 13, brace panel 14 and loam cake 15.
Two group oil cylinders 6 and piston 7 are to be arranged side by side, and constitute two jacks arranged side by side, and front clip component is installed in the middle front end place of two jacks arranged side by side, and the ground tackle on the front clip component is single-row shape and distributes.Flat anchor hole number optionally can be chosen in the 2-5 hole, and the flat anchor hole number of present embodiment is 3 holes.The front and back of two jacks arranged side by side are to be fixed together with preceding connecting panel 3, back connecting panel 4.
Moving back anchor core print 13 is to be threaded with preceding connecting panel 3, brace panel 14 is to be connected with screw with oil cylinder 6, instrument anchor slab 12 is to be connected by screw with brace panel 14, and instrument anchor slab 12 is to be connected by screw with spring perch 8, is the circular arc free-running fit between instrument anchor slab 12, spring perch 8 and two oil cylinders 6 arranged side by side.When moving back anchor core print 13, make instrument intermediate plate 11 and move back anchor core print 13 and produce displacement along with mobile the moving forward of preceding connecting panel 3.Because boosting of jack, two oil cylinders 6 arranged side by side produce motion, driving brace panel 14 moves, brace panel 14 also drives 12 motions of instrument anchor slab, spring perch 8 its sense of motion under the promotion of instrument anchor slab 12 is consistent with oil cylinder 6 sense of motions, and instrument intermediate plate 11 follows up automatically along the taper hole of instrument anchor slab 12 under the promotion of spring 9, make instrument intermediate plate 11 clamp prestressing tendon and drive prestressing tendon and move towards oil cylinder 6 identical directions, thereby to the prestressing tendon application of stress.
During work, cassette jack installation in position before the ground tackle of will working, prestressing tendon and the flat anchor after globality is once reeved, connects 2YBZ2-80 high-voltage electric oil pump, beginning stretch-draw work.
1, opens electric oil pump, to oil-feed cylinder fuel feeding at the uniform velocity, the piston 7 suffered transmission of pressures of jack arrive preceding connecting panel 3, withstood an end of work ground tackle, produce antagonistic force and make oil cylinder 6 outside uniform movements, move back anchor core print 13 and produce displacement with instrument intermediate plate 11, spring 9 in the front clip component makes the taper hole follow-up of instrument intermediate plate 11 along instrument anchor slab 12 by spring housing 10, avoided the dislocation of instrument intermediate plate, instrument intermediate plate 11 clamps the anchoring prestressing tendon and at the uniform velocity outwards moves with oil cylinder 6, and preceding connecting panel 3 plays the automatic spacing effect.
2, after the cassette jack tension meets the requirements of technical value before the flat anchor, stop to the oil-feed oil supply cylinder, the differential pressure that makes the oil-feed cylinder is to zero point, then to oil return cylinder fuel feeding at the uniform velocity, oil cylinder 6 backhauls then stop the work of high-voltage electric oil pump on earth, and stretch-draw is for the first time finished.
If 3 stretch-draw for the first time do not reach designing requirement to parameters such as the stress of member designs, stretch values, then carry out the second time or repeatedly stretch-draw, directly restart electric oil pump, repetitive operation step 1,2 stretch-draw are until reaching designing requirement.
In accompanying drawing 4 described scheme of installations, the 16th, work anchor intermediate plate, the 17th, flat type work anchor slab, the 18th, flat type anchor plate, the 19th, spiral bar, the 20th, prestressing tendon, the 21st, metal bellow, the 22nd, concrete component.
Claims (4)
1, cassette jack before a kind of flat anchor includes oil cylinder (6), piston (7), bottom (5), loam cake (15) and front clip component, it is characterized in that two group oil cylinders (6) and piston (7) are to be arranged side by side, thereby constitutes two jacks arranged side by side; Front clip component is installed in the middle front end place of two jacks arranged side by side, and the ground tackle on the front clip component is single-row shape and distributes.
2, cassette jack before the flat anchor according to claim 1, the front and back that it is characterized in that described two jacks arranged side by side are to be fixed together with preceding connecting panel (3), back connecting panel (4).
3, cassette jack before the flat anchor according to claim 2 is characterized in that between instrument anchor slab 12, spring perch 8 and two oil cylinders arranged side by side be the circular arc free-running fit.
4, cassette jack before the flat anchor according to claim 3, it is characterized in that moving back anchor core print 13 is to be threaded with preceding connecting panel 3, and instrument anchor slab 12 is to be connected by screw with brace panel 14, and instrument anchor slab 12 is to be connected by screw with spring perch 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98212948 CN2384931Y (en) | 1998-03-09 | 1998-03-09 | Flat-anchor front-retained lifting jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98212948 CN2384931Y (en) | 1998-03-09 | 1998-03-09 | Flat-anchor front-retained lifting jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2384931Y true CN2384931Y (en) | 2000-06-28 |
Family
ID=33967070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98212948 Expired - Fee Related CN2384931Y (en) | 1998-03-09 | 1998-03-09 | Flat-anchor front-retained lifting jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2384931Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331767A (en) * | 2011-08-15 | 2012-01-25 | 北京市建筑工程研究院有限责任公司 | Synchronous computer controller device for overall tension and construction method |
| CN102734254A (en) * | 2012-07-13 | 2012-10-17 | 三一重工股份有限公司 | Parallel oil cylinder and engineering machinery |
| CN104045018A (en) * | 2014-05-30 | 2014-09-17 | 柳州泰姆预应力机械有限公司 | Front-clamping type jack |
-
1998
- 1998-03-09 CN CN 98212948 patent/CN2384931Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102331767A (en) * | 2011-08-15 | 2012-01-25 | 北京市建筑工程研究院有限责任公司 | Synchronous computer controller device for overall tension and construction method |
| CN102331767B (en) * | 2011-08-15 | 2013-01-02 | 北京市建筑工程研究院有限责任公司 | Synchronous computer controller device for overall tension and construction method |
| CN102734254A (en) * | 2012-07-13 | 2012-10-17 | 三一重工股份有限公司 | Parallel oil cylinder and engineering machinery |
| CN102734254B (en) * | 2012-07-13 | 2015-12-02 | 三一汽车制造有限公司 | Parallel oil cylinder and engineering machinery |
| CN104045018A (en) * | 2014-05-30 | 2014-09-17 | 柳州泰姆预应力机械有限公司 | Front-clamping type jack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |