CN2460241Y - Jack for single prestressed reinforcing steel stretch-draw - Google Patents
Jack for single prestressed reinforcing steel stretch-draw Download PDFInfo
- Publication number
- CN2460241Y CN2460241Y CN 00262627 CN00262627U CN2460241Y CN 2460241 Y CN2460241 Y CN 2460241Y CN 00262627 CN00262627 CN 00262627 CN 00262627 U CN00262627 U CN 00262627U CN 2460241 Y CN2460241 Y CN 2460241Y
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- CN
- China
- Prior art keywords
- gathering sill
- piston bush
- reinforcing steel
- utility
- model
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- Expired - Fee Related
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Abstract
The utility model relates to a front clamping type jack for stretching a single prestressing tendon, which comprises a piston sleeve and a feed-through sleeve, wherein, an inner side face of the piston sleeve and an outer side face of the feed-through sleeve of the utility model are respectively provided with a guiding groove and a guiding block arranged in the guiding. In the prestressing technology of building components, the utility model is used for implementing stretching to single prestressing tendons. Compared with the prior art, the utility model has the advantages that the feed-through sleeve is prevented from being rotated correspondingly to the piston sleeve, the prestressing tendon is avoided from being extended because of rotation and relaxation, and thus construction quality is ensured.
Description
The utility model relates to jack, especially is used for the stretch-draw instrument to single presstressed reinforcing steel stress application in the building unit prestressing technique.
In the middle of the building unit pre-stress construction, usually need implementing stretch-draw by the stranded single presstressed reinforcing steel of making of steel wire strand.When this presstressed reinforcing steel was implemented stretch-draw, just these stranded steel wires can produce a turning moment, if to the not in addition oppositely containing of this moment, presstressed reinforcing steel will rotate, and causes the presstressed reinforcing steel elongation per unit length to become big, influences workmanship.At present, it is identical or similar that this single presstressed reinforcing steel is carried out the preceding cassette jack that the instrument of stretch-draw mostly produces now, uses with the applicant, its relative motion of this jack is produced between parts not only can axially-movable, but also can relative rotary motion, therefore, above-mentioned during in stretch-draw by the stranded single presstressed reinforcing steel of making of steel wire strand, can cause presstressed reinforcing steel rotation, elongation.
The purpose of this utility model provides a kind of when implementing single tension of prestressed tendon, can prevent the preceding cassette jack of single tension of prestressed tendon of presstressed reinforcing steel rotation.
For achieving the above object, the scheme that the utility model adopts is: it includes piston bush and punching cover, and the lateral surface of the medial surface of its piston bush and punching cover is respectively arranged with gathering sill and is contained in the interior guide pad of this gathering sill.
Above-mentioned gathering sill can be located at the medial surface of described piston bush, and guide pad then is located at the lateral surface of described punching cover, and gathering sill can be contained in by the cylindrical shell of fluting on the medial surface of described piston bush and constitute, and also can directly be processed to form on the medial surface of piston bush; Above-mentioned gathering sill also can be located at the lateral surface of described punching cover, and guide pad then is located at the medial surface of described piston bush, and the lateral surface that gathering sill can be contained in described punching cover by the cylindrical shell of fluting constitutes, and also can directly be processed to form on the lateral surface of punching cover.Above-mentioned gathering sill can be one group with the combination that is contained in the guide pad in the gathering sill, and many groups also can be arranged.
Above-mentioned punching cover is meant and is used for penetrating therein the also telescopic installing component of relative fixed presstressed reinforcing steel; Above-mentioned guide pad can pass through screw, pin and be connected with piston bush or punching cover, the protrusion that also can be direct forming put in piston bush or punching.
Owing to adopted such scheme, the utility model compared with prior art has following beneficial effect:
Be respectively arranged with gathering sill and the guide pad that is contained in this gathering sill at the medial surface of described piston bush and the lateral surface of described punching cover, therefore, can effectively prevent of the rotation of punching cover, thereby avoid presstressed reinforcing steel rotation, elongation, guarantee construction quality with respect to piston bush.
The utility model is described in further detail below in conjunction with the accompanying drawing example:
Fig. 1 is the structural representation of preceding cassette jack in the prior art.
Fig. 2 is the structural representation of the utility model embodiment.
Fig. 3 is the A-A sectional drawing of Fig. 2.
Preceding cassette jack shown in Figure 1, it is the preceding cassette jack that the applicant produces now, uses, the most of lateral surface major part with punching cover 2 of its piston bush 1 medial surface all is the face of cylinder, piston bush 1 can rotate relatively with punching cover 2, the cassette jack during by the stranded single presstressed reinforcing steel of making of steel wire strand, can cause presstressed reinforcing steel rotation, elongation in stretch-draw before this.
Among Fig. 2, the utility model embodiment shown in Figure 3, on piston bush 14 medial surfaces, inlay slotted cylindrical shell 15, the cylindrical shell 15 of piston bush 14 and fluting fixedly be linked to be one can not relative motion integral body, groove on the cylindrical shell 15 has just formed the gathering sill that is arranged on piston bush 14 medial surfaces, during work, the cylindrical shell 15 of fluting, piston bush 14 and become a relatively-stationary integral body by piston end cover 8, the limit body 11 that is threaded; Lateral surface at punching cover 13, be connected with guide pad 5 by alignment pin 6, guide pad 5 just in time is contained in the above-mentioned gathering sill, oil cylinder 4, pressing plate 17, nut 16, punching cover 13 and go up between alignment pin 6, guide pad 5 and the instrument anchor ring of installing 9 by screw thread or alignment pin 6 and connect into motion integral body with respect to piston bush 14.The utility model is when work, presstressed reinforcing steel passes from piston end cover 8 and enters in the instrument anchor ring 9, effect by intermediate plate 10, spring housing 12 and the spring 7 of installing in instrument anchor ring 9 is held fixing, when oil pipe 3 input fluid under pressures, oil cylinder 4, pressing plate 17, nut 16, punching cover 13 and alignment pin 6, guide pad 5 and instrument anchor ring 9 integral body of upward installing are moved to the direction of nut 16 1 ends with respect to piston bush 14, simultaneously presstressed reinforcing steel are drawn in the piston bush 14.In the process of stretch-draw, guide pad 5 moves along gathering sill, thereby prevents that 13 effects at presstressed reinforcing steel of punching cover from issuing looks for the relatively rotating of piston bush 14, and guaranteed that presstressed reinforcing steel is unlikely the elongation of loosening in stretching process.
Claims (6)
1, cassette jack before the single tension of prestressed tendon, it includes piston bush and punching cover, it is characterized in that: the lateral surface of the medial surface of described piston bush and described punching cover is respectively arranged with gathering sill and is contained in the interior guide pad of this gathering sill.
2, cassette jack before the single tension of prestressed tendon according to claim 1, it is characterized in that: described gathering sill is located at the medial surface of described piston bush; Described guide pad is located at the lateral surface of described punching cover.
3, cassette jack before the single tension of prestressed tendon according to claim 2 is characterized in that: described gathering sill is contained in by the cylindrical shell of fluting on the medial surface of described piston bush and constitutes.
4, cassette jack before the single tension of prestressed tendon according to claim 1 is characterized in that: described gathering sill is located at the lateral surface of described punching cover; Described guide pad is located at the medial surface of described piston bush.
5, cassette jack before the single tension of prestressed tendon according to claim 4 is characterized in that: described gathering sill is made of the lateral surface that the cylindrical shell of slotting is contained in described punching cover.
6, according to cassette jack before claim 1,2,3, the 4 or 5 described single tension of prestressed tendon, it is characterized in that: described gathering sill has many groups with the combination that is contained in the guide pad in the gathering sill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262627 CN2460241Y (en) | 2000-11-13 | 2000-11-13 | Jack for single prestressed reinforcing steel stretch-draw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00262627 CN2460241Y (en) | 2000-11-13 | 2000-11-13 | Jack for single prestressed reinforcing steel stretch-draw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2460241Y true CN2460241Y (en) | 2001-11-21 |
Family
ID=33617839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00262627 Expired - Fee Related CN2460241Y (en) | 2000-11-13 | 2000-11-13 | Jack for single prestressed reinforcing steel stretch-draw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2460241Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798876A (en) * | 2010-04-28 | 2010-08-11 | 赵正义 | Structure for reducing reinforcement stresses before tension withdrawing |
| CN102953549A (en) * | 2011-08-30 | 2013-03-06 | 中铁十局集团有限公司 | Novel quick tensioning construction method for front-blocked jack |
-
2000
- 2000-11-13 CN CN 00262627 patent/CN2460241Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101798876A (en) * | 2010-04-28 | 2010-08-11 | 赵正义 | Structure for reducing reinforcement stresses before tension withdrawing |
| CN101798876B (en) * | 2010-04-28 | 2012-09-12 | 赵正义 | Structure for reducing reinforcement stresses before tension withdrawing |
| CN102953549A (en) * | 2011-08-30 | 2013-03-06 | 中铁十局集团有限公司 | Novel quick tensioning construction method for front-blocked jack |
| CN102953549B (en) * | 2011-08-30 | 2015-03-18 | 中铁十局集团有限公司 | Novel quick tensioning construction method for front-blocked 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 |