CN203877835U - Novel highway and bridge steel strand tensioning jack - Google Patents
Novel highway and bridge steel strand tensioning jack Download PDFInfo
- Publication number
- CN203877835U CN203877835U CN201420330643.8U CN201420330643U CN203877835U CN 203877835 U CN203877835 U CN 203877835U CN 201420330643 U CN201420330643 U CN 201420330643U CN 203877835 U CN203877835 U CN 203877835U
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- China
- Prior art keywords
- piston
- piston rod
- steel strand
- briquetting
- bridge steel
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- Expired - Fee Related
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 239000000446 fuel Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 6
- 230000033001 locomotion Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a novel highway and bridge steel strand tensioning jack. The novel highway and bridge steel strand tensioning jack comprises a cylinder, a front end cover, a rear end cover, a piston and a piston rod. The extending end of the piston rod is connected with a movable clamping groove; the outer side of the rear end cover is provided with a fixed clamping sleeve; one side of the inside of the cylinder, which is close to the rear end cover, is provided with a positioning block, the positioning block is provided with a radial hole, and a steel ball is arranged inside the radial hole; the piston is provided with a sliding press block, a first spring is arranged between the press block and the rear end surface of the piston, and a retaining ring for limiting the press block is arranged between the piston and the press block; the rear end of the piston rod is connected with a nut, and the nut is circumferentially provided with a concave arc groove corresponding to the radial hole. According to the novel highway and bridge steel strand tensioning jack, the movement of the piston can be locked by pressing the steel ball into the concave arc groove through the press block, so that stable self-locking of the piston can be guaranteed during the alternant process of releasing a steel strand through the movable clamping sleeve and fixing the steel strand through the fixed clamping sleeve, and further working instability of the jack due to movement of the piston under relatively large external force can be avoided.
Description
Technical field
The utility model relates to a kind of novel road bridge steel twisted wire stretch-draw jack.
Background technology
At present, in the construction engineerings such as span compare great highway, bridge, as the steel strand of drag-line, all need to adopt when mounted jack to carry out prestressed stretch-draw, make it produce certain deformation, can bear the suffered load of steel member itself, increase the useful life longevity of steel member.With regard to existing jack, substantially can meet the stretch-draw operating needs of steel strand, and develop multiple use function for different situations, existing jack adopts hydraulic ram push structure mostly, it after stretch-draw puts in place, clamps steel strand by fixing to clamp cover by being connected to the mobile gripping sleeve tension steel strand on piston, mobile gripping sleeve unclamps steel strand and retreats into original position with piston, carries out stretch-draw next time.In this process, require oil cylinder in the time that single tension puts in place, need to there is good lock function, prevent that piston rod is moved under larger External Force Acting, affect stretch-draw effect, cause jack Shortcomings aspect the stationarity of work.
Summary of the invention
The technical problems to be solved in the utility model is: the problem existing in order to solve prior art in above-mentioned background technology, provides after a kind of stretch-draw the novel road bridge steel twisted wire stretch-draw jack that has good auto-lock function, improves working stability.
The utility model solves the technical scheme that its technical matters adopts: a kind of novel road bridge steel twisted wire stretch-draw jack, comprise cylinder body, front end cover, rear side housing, piston and piston rod, on cylinder body, offer front fuel feed hole and rear fuel feed hole, described piston rod external part is connected with mobile gripping sleeve, rear side housing outside is provided with and fixes to clamp cover, piston rod center has for wearing steel strand, and run through the through hole of rear side housing, in cylinder body, nearly rear side housing side is provided with locating piece, on locating piece, offer radial hole, in radial hole, be provided with steel ball, on piston, be provided with slidably briquetting, between briquetting and piston rear end face, be provided with the first spring, between piston and briquetting, be provided with the back-up ring spacing to briquetting, piston rod rear end is connected with a side and is adjacent to the nut of piston rear end face, nut along the circumferential direction offers the imploded arcs groove corresponding with described radial hole.
More firm for guaranteeing steel ball locking, described steel ball both sides are provided with trapezoidal pin.
For ensureing that better piston rod moves steadily, on described piston rod, be provided with the baffle plate that is positioned at piston front, on piston, offer inner cavity, be provided with the second spring in described inner cavity, the external side end that baffle plate is pressed in the second spring moves with piston rod and compresses or discharge the second spring.
The outer circumference surface of described briquetting coordinates with the inwall fluid-tight of cylinder body.
The beneficial effects of the utility model are: the utility model is in the time that piston moves to bottom, cylinder body lower end, by steel ball by the interior arc fluting on briquetting pressed-in nut compress and lock piston moves, now movable clamping cover unclamps steel strand, fix to clamp cover and clamp steel strand, ensure unclamping and clamp in the alternation procedure of steel strand, can, stably from pinning piston, prevent that piston is moved under larger External Force Acting, cause the jiggly phenomenon of jack work.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model under lock-out state.
Fig. 3 is the partial enlarged drawing of Fig. 1.
In figure: 1. the rear fuel feed hole 8. of the cylinder body 2. front end cover 3. rear side housing 4. piston front fuel feed hole 7. of 5. piston rod 6. moves gripping sleeve 9. and fixes to clamp trapezoidal pin 20. baffle plate 21. inner cavity 22. second springs of cover 10. through hole 11. locating piece 12. radial hole 13. steel ball 14. briquetting 15. first spring 16. back-up ring 17. nut 18. imploded arcs groove 19.
Detailed description of the invention
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present utility model is only described in a schematic way, and therefore it only shows the formation relevant with the utility model.
A kind of novel road bridge steel twisted wire stretch-draw jack as shown in FIG. 1 to 3, comprise cylinder body 1, front end cover 2, rear side housing 3, piston 4 and piston rod 5, on cylinder body 1, offer front fuel feed hole 6 and rear fuel feed hole 7, described piston rod 5 external parts are connected with mobile gripping sleeve 8, rear side housing 3 outsides are provided with and fix to clamp cover 9, and piston rod 5 centers have for wearing steel strand and running through the through hole 10 of rear side housing 3.
Interior nearly rear side housing 3 sides of cylinder body 1 are provided with locating piece 11, on locating piece 11, offer radial hole 12, in radial hole 12, be provided with steel ball 13, described steel ball 13 both sides are provided with trapezoidal pin 19, on piston 4, be provided with slidably briquetting 14, the outer circumference surface of described briquetting 14 coordinates with the inwall fluid-tight of cylinder body 1, between briquetting 14 and piston 4 aft end faces, be provided with the first spring 15, between piston 4 and briquetting 14, be provided with the back-up ring 16 spacing to briquetting 14, piston rod 5 rear ends are connected with a side and are adjacent to the nut 17 of piston 4 aft end faces, nut 17 along the circumferential direction offers the imploded arcs groove 18 corresponding with described radial hole 12.
On described piston rod 5, be provided with the baffle plate 20 that is positioned at piston 4 fronts, offer inner cavity 21 on piston 4, be provided with the second spring 22 in described inner cavity 21, the external side end that baffle plate 20 is pressed in the second spring 22 moves with piston rod 5 and compresses or discharge the second spring 22.
Working process is summarized as follows: steel strand are located in through hole 10, when current fuel feed hole 6 oil-feed, fix to clamp cover 9 and unclamp steel strand, mobile gripping sleeve 8 clamps steel strand, piston rod 5 moves down, the mobile gripping sleeve 8 that drive is fixed on piston rod 5 outer ends synchronously moves down and drawing steel stranded wire, in the time that piston 4 moves to cylinder body 1 bottom, the nut 17 of piston rod 5 rear ends enters in the endoporus of locating piece 11 and promotes steel ball 13 and float, when moving to steel ball 13, blocks after briquetting 14 in piston rod 5, briquetting 14 stops mobile, piston rod 5 drives nut 17 to compress the first spring 15 and the second spring 22 continues to move downward, steel ball 13 starts to fall in the imploded arcs groove 18 of nut 17, and briquetting 14 also moves down under the effect of the first spring 15, in steel ball 13 is fallen into imploded arcs groove 18 completely, piston 4 is encountered cylinder body 1 bottom, piston rod 5 stop motions, briquetting 14 is also with shutting by steel ball 13 tops, steel ball 13 cannot float, be stuck in imploded arcs groove 18, thereby play auto lock effect, now can unclamp mobile gripping sleeve 8, fix to clamp cover 9 and clamp steel strand, complete drawing process one time, when after fuel feed hole 7 oil-feeds, hydraulic drive piston 4 moves, spacing due to back-up ring 16 when piston 4 moves right, drive briquetting 14 move together, in the time moving certain distance, steel ball 13 radially hole 12 outwards moves, realize release, piston rod 5 stretches out and drives mobile gripping sleeve 8 to move to initial position and carry out drawing next time, constantly repeats above-mentioned steps, thereby completes the stretch-draw of steel strand.
The utility model is pressed in interior arc fluting 18 by briquetting 14 by steel ball 13 and lock piston 4 moves, ensure to unclamp steel strand at mobile gripping sleeve 8, fixed to clamp in cover 9 these alternation procedures of clamping steel strand, can be stably from pinning piston 4, prevent that piston rod 5 is moved under larger External Force Acting, cause the jiggly phenomenon of jack work, improved stability and the safety of jack work.
Taking above-mentioned foundation desirable embodiment of the present utility model as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this utility model technological thought, carry out various change and amendment completely.The technical scope of this utility model is not limited to the content on specification sheets, must determine its technical scope according to claim scope.
Claims (4)
1. a novel road bridge steel twisted wire stretch-draw jack, comprise cylinder body (1), front end cover (2), rear side housing (3), piston (4) and piston rod (5), on cylinder body (1), offer front fuel feed hole (6) and rear fuel feed hole (7), it is characterized in that: described piston rod (5) external part is connected with mobile gripping sleeve (8), rear side housing (3) outside is provided with and fixes to clamp cover (9), piston rod (5) center has for wearing steel strand, and run through the through hole (10) of rear side housing (3), in cylinder body (1), nearly rear side housing (3) side is provided with locating piece (11), on locating piece (11), offer radial hole (12), in radial hole (12), be provided with steel ball (13), on piston (4), be provided with slidably briquetting (14), between briquetting (14) and piston (4) aft end face, be provided with the first spring (15), between piston (4) and briquetting (14), be provided with the back-up ring (16) spacing to briquetting (14), piston rod (5) rear end is connected with a side and is adjacent to the nut (17) of piston (4) aft end face, nut (17) along the circumferential direction offers the imploded arcs groove (18) corresponding with described radial hole (12).
2. novel road bridge steel twisted wire stretch-draw jack according to claim 1, is characterized in that: described steel ball (13) both sides are provided with trapezoidal pin (19).
3. novel road bridge steel twisted wire stretch-draw jack according to claim 1, it is characterized in that: on described piston rod (5), be provided with the baffle plate (20) that is positioned at piston (4) front, on piston (4), offer inner cavity (21), in described inner cavity (21), be provided with the second spring (22), the external side end that baffle plate (20) is pressed in the second spring (22) moves and compresses or discharge the second spring (22) with piston rod (5).
4. novel road bridge steel twisted wire stretch-draw jack according to claim 1, is characterized in that: the outer circumference surface of described briquetting (14) coordinates with the inwall fluid-tight of cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330643.8U CN203877835U (en) | 2014-06-16 | 2014-06-16 | Novel highway and bridge steel strand tensioning jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420330643.8U CN203877835U (en) | 2014-06-16 | 2014-06-16 | Novel highway and bridge steel strand tensioning jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203877835U true CN203877835U (en) | 2014-10-15 |
Family
ID=51678360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420330643.8U Expired - Fee Related CN203877835U (en) | 2014-06-16 | 2014-06-16 | Novel highway and bridge steel strand tensioning jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203877835U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652287A (en) * | 2015-02-25 | 2015-05-27 | 林同棪国际工程咨询（中国）有限公司 | Bridge pre-stress tension device |
| CN105387820A (en) * | 2015-11-01 | 2016-03-09 | 中北大学 | Circumferential positioning laser deep hole straightness detection device |
| CN107601342A (en) * | 2016-07-11 | 2018-01-19 | 北京汽车股份有限公司 | Vehicle |
| CN112227730A (en) * | 2020-10-16 | 2021-01-15 | 盐城市双强管桩有限公司 | Interactive device of numerical control tensioning equipment |
| CN113737649A (en) * | 2021-08-19 | 2021-12-03 | 中铁十六局集团第五工程有限公司 | Bridge suspension cable tensioning device |
-
2014
- 2014-06-16 CN CN201420330643.8U patent/CN203877835U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104652287A (en) * | 2015-02-25 | 2015-05-27 | 林同棪国际工程咨询（中国）有限公司 | Bridge pre-stress tension device |
| CN104652287B (en) * | 2015-02-25 | 2016-06-22 | 林同棪国际工程咨询（中国）有限公司 | Bridge prestress tensioning equipment |
| CN105387820A (en) * | 2015-11-01 | 2016-03-09 | 中北大学 | Circumferential positioning laser deep hole straightness detection device |
| CN105387820B (en) * | 2015-11-01 | 2018-02-16 | 中北大学 | Circumferential registration laser Deep Hole Straightness Test Device |
| CN107601342A (en) * | 2016-07-11 | 2018-01-19 | 北京汽车股份有限公司 | Vehicle |
| CN112227730A (en) * | 2020-10-16 | 2021-01-15 | 盐城市双强管桩有限公司 | Interactive device of numerical control tensioning equipment |
| CN112227730B (en) * | 2020-10-16 | 2022-03-15 | 盐城市双强管桩有限公司 | Interactive device of numerical control tensioning equipment |
| CN113737649A (en) * | 2021-08-19 | 2021-12-03 | 中铁十六局集团第五工程有限公司 | Bridge suspension cable tensioning device |
| CN113737649B (en) * | 2021-08-19 | 2023-03-14 | 中铁十六局集团第五工程有限公司 | Bridge suspension cable tensioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RAIL TRANSIT ENGINEERING CO. OF CHINA RAILWAY 18TH Free format text: FORMER OWNER: XIAO SHUGUO Effective date: 20150113 Owner name: THE EIGHTEENTH BUREAU OF CHINA'S RAILROAD GROUP CO Effective date: 20150113 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 530021 NANNING, GUANGXI ZHUANG AUTONOMOUS REGION TO: 530031 NANNING, GUANGXI ZHUANG AUTONOMOUS REGION |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150113 Address after: 530031, the Guangxi Zhuang Autonomous Region City, Nanning Jinzhou Road, 31 City masterpiece, 2 floor Patentee after: Rail Transit Engineering Co., Ltd. of China Railway 18 Bureau Group Co., Ltd. Patentee after: the Eighteenth Bureau of China's Railroad Group Co., Ltd. Address before: 530021 the Guangxi Zhuang Autonomous Region Nanning Jinzhou Road No. 31 city Jiezuo 23 layer eighteen Bureau of China Railway Group Track Traffic Engineering Co. Patentee before: Xiao Shuguo |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Rail Transit Engineering Co., Ltd. of China Railway 18 Bureau Group Co., Ltd. Document name: Notification to Pay the Fees |
|
| 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: 20141015 Termination date: 20170616 |