CN201882850U - Tensioning hydraulic jack with prestressed tendon - Google Patents
Tensioning hydraulic jack with prestressed tendon Download PDFInfo
- Publication number
- CN201882850U CN201882850U CN2010206412816U CN201020641281U CN201882850U CN 201882850 U CN201882850 U CN 201882850U CN 2010206412816 U CN2010206412816 U CN 2010206412816U CN 201020641281 U CN201020641281 U CN 201020641281U CN 201882850 U CN201882850 U CN 201882850U
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- Prior art keywords
- cylinder barrel
- piston rod
- hydraulic jack
- cylinder
- pressure sensor
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Abstract
The utility model discloses a tensioning hydraulic jack with a prestressed tendon. A cylinder cover is hermetically arranged on one end of a cylinder barrel of the tensioning hydraulic jack and consists of a multi-post pressure sensor, a piston rod is axially hermetically assembled in the cylinder barrel in a sliding manner, one end of the annular piston rod penetrates through the end surface of the other end of the cylinder barrel in an axially extending manner, an oil inlet and an oil outlet are respectively disposed on a bearing surface, which corresponds to the piston rod, of the cylinder barrel, through holes which are communicated with each other are respectively axially arranged on the cylinder cover and the piston rod, the prestressed tendon is penetratingly arranged in the through holes, an inner cylinder liner which is in hermetic sliding fit with an inner hole wall of the piston rod is fixed onto an inner hole wall of the cylinder cover, the cylinder barrel is provided with a clamping key which is in location fit with the peripheral surface of the multi-post pressure sensor and arranged on the inner wall of the cylinder barrel, and a displacement sensor used for monitoring displacement of the piston rod is fixedly arranged on the other end surface, which is far away from the cylinder cover, of the cylinder barrel. Manual monitoring of the prior art is replaced by the pressure sensor and the displacement sensor, on the one hand, the problem of large errors due to human factors is avoided, on the other hand, monitoring precision and monitoring speed of the tensioning hydraulic jack are greatly improved, and accordingly tensioning construction of the prestressed tendon is rapid, accurate and safe.
Description
Technical field
The utility model relates to the hydraulic jack that uses in the tension of prestressed tendon work progress in a kind of civil engineering.
Background technology
In the stretching construction of prestressing tendon, need the stress and strain of prestressing tendon all to adhere to specification.The main hydraulic jack that adopts of existing tension of prestressed tendon construction, during construction, the stretching force that the workmen applies by the oil pressure indicator modulated pressure jack of observing on the oil pump, the length that prestressing tendon is elongated need obtain with the ruler actual measurement by artificial, and the transmission work of information also is by manual record.The defective that this manually operated tension of prestressed tendon construction exists is:
1. control accuracy is low, and result of a measurement exists than mistake;
2. human element influences the tension of prestressed tendon construction quality, and both personal error was big;
3. operating efficiency is lower:
4. real-time, the accuracy that information is transmitted in the work progress is relatively poor;
5. the quality monitoring difficulty is bigger when component inside or more hidden scope of operation stretching construction;
6. to supervise needed human resources bigger for construction quality, and quality-control cost is higher.
The utility model content
The purpose of this utility model is: provide a kind of tension of prestressed tendon hydraulic jack, to solve the problem that personal monitoring's precision is low, error is big in the prior art.
The technical scheme of tension of prestressed tendon hydraulic jack of the present utility model is: a kind of tension of prestressed tendon hydraulic jack, comprise cylinder barrel, the back-end sealing of cylinder barrel is provided with cylinder cap, the side seal slidable fit has piston rod in the cylinder barrel, one end of annular piston bar extends axially the end face that passes the cylinder barrel front end, on described cylinder cap and piston rod, axially offer respectively and be interconnected, be used to wear the through hole of prestressing tendon, be fixed with on the hole wall of through hole on the described cylinder cap with piston rod on the inner cylinder liner of hole wall sealed sliding running-fit of through hole, described cylinder cap is made of shape and described cylinder barrel and the adaptive polystyle pressure sensor of inner cylinder liner, on the inwall of described cylinder barrel, be provided with the card key that cooperates with this polystyle pressure sensor outer peripheral face location, on the front end face of described cylinder barrel, fixedly install the displacement pickup that is useful on the displacement of monitoring piston rod.
On the outer face of described polystyle pressure sensor, axially convex with the boss that is used for anchoring auxiliary member limit card.
Pass at described piston rod on the outer face of cylinder barrel and axially offer the annular groove that is used for the limit card moveable anchor.
Adopt the adaptive polystyle pressure sensor of shape and cylinder barrel and inner cylinder liner to substitute existing cylinder cap on the hydraulic jack of the present utility model, it is in the sealing cylinder barrel, can cooperate the stretching force of monitoring prestressing tendon with anchor fitting, the displacement pickup that is provided with on itself and the cylinder barrel end face is used, realized the automatic monitoring of the stress and strain in the tension of prestressed tendon process, avoided the big problem of error that causes because of human element, its monitoring accuracy and monitoring velocity greatly improve on the other hand, make that the stretching construction of prestressing tendon is quick, accurately, but each sensor signal is by the mode of operation of computer information processing system automatic guidance hydraulic jack, the tension of prestressed tendon that can effectively avoid human element the to cause accident that causes out of control.
Description of drawings
Fig. 1 is the structural representation of the utility model tension of prestressed tendon hydraulic jack specific embodiment;
Fig. 2 is the running condition scheme drawing of the utility model tension of prestressed tendon hydraulic jack.
The specific embodiment
The specific embodiment of tension of prestressed tendon hydraulic jack of the present utility model as shown in Figure 1, it comprises cylinder barrel 9, the side seal slidable fit has piston rod 12 in the cylinder barrel 9, one end of piston rod 12 extends axially the front end end face that passes cylinder barrel 9, on the outer face of piston rod 12, axially offer and be used for and the spacing annular groove that cooperates of moveable anchor device, back-end sealing at cylinder barrel 9 is provided with cylinder cap, on cylinder cap and piston rod 12, axially offer respectively and be interconnected, be used to wear the through hole of prestressing tendon, on the hole wall of cylinder cap through hole, be fixed with inner cylinder liner 10 with the hole wall sealed sliding running-fit of piston rod 12 through holes, in the utility model, this cylinder cap is made of shape and cylinder barrel 9 and inner cylinder liner 10 adaptive polystyle pressure sensors 8, is provided with on the inwall of cylinder barrel 9 and the spacing card key 7 that cooperates of the outer peripheral face of this polystyle pressure sensor 8.On the front end face of cylinder barrel 9, fixedly install the displacement pickup 11 that is useful on monitoring piston rod 12 longitudinal travels.Corresponding piston rod 12 also is respectively arranged with into and out of hydraulic fluid port on the sidewall of cylinder barrel 9.
During use, be used for tensioned prestressing bar member 17 be fixed with reinforced rib 3 and offer corresponding prestressing tendon duct 1, prestressing tendon 15 is located in this duct 1, be provided with the work anchor device in the port in prestressing tendon duct 1, this work anchor device comprises and installs the anchor plate 2 that is fixed in the prestressing tendon duct 1, roof pressure is provided with anchor fitting 4 on the outer face of anchor plate 2, each prestressing tendon 15 passes the corresponding anchor hole that offers on this anchor fitting 4, the outer hole of each anchor hole is provided with the mooring anchor 5 that is used for the anchoring prestressing tendon along locating correspondence, roof pressure is provided with backup anchor fixing apparatus 6 on the outer face of mooring anchor 5, the boss card of this backup anchor fixing apparatus 6 on the polystyle pressure sensor 8 that is provided with on the outer face of hydraulic jack and the hydraulic jack joined, and makes hydraulic jack and the 6 coaxial settings of backup anchor fixing apparatus.Prestressing tendon 15 passes the trepanning of inner cylinder liner 10 on the hydraulic jack and the endoporus of piston rod 12, roof pressure is provided with the moveable anchor device 13 that is used for tensioned prestressing bar 15 on the outer face of piston rod 12, this moveable anchor device 13 is installed in the annular groove on piston rod 12 outer faces, guarantee that moveable anchor device 13 is coaxial with hydraulic jack, the corresponding fixed orifice that offers prestressing tendon on moveable anchor device 13 is provided with provisional mooring anchor 14 on the edge, outer hole of fixed orifice.When tensioned prestressing bar, oil inlet and outlet on the hydraulic jack cylinder barrel is connected on the oil pump 16, start oil pump 16 and make hydraulic jack work, hydraulic jack promotes moveable anchor device 13 by its piston rod and moves, the strain data of prestressing tendon 15 is monitored in real time by the displacement pickup that is provided with on the hydraulic jack cylinder barrel end face, simultaneously, the antagonistic force of hydraulic jack upper piston rod 12 is applied on the polystyle pressure sensor 8 of hydraulic jack top ends, thereby realizes the real-time monitoring to the stress data of prestressing tendon.Polystyle pressure sensor 8 and displacement pickup 11 all are connected with the computer control system 19 that is used to control oil pump 16 work by signal pickup assembly 18, stress and strain data that polystyle pressure sensor 8 and displacement pickup 11 monitorings obtain are input in the computing machine 19 by information collecting device 18, stress and strain that is obtained by 19 pairs of monitorings of computing machine and the preset value in the computing machine are compared, when stress reaches required value, when strain value does not reach, or strain value reaches required value, when stress value does not reach, computer control system 19 is reported to the police and is controlled oil pump 16 simultaneously by the surpassed distance warning and quits work, and prevents that prestressing tendon is destroyed.In the time of construction, computer control system 19 connects monitoring camera-shooting device 20, wireless telemetry 21 and internet 22 respectively, tensioning equipment to prestressing tendon is monitored in real time, gather the mode of operation of prestressing tendon and tensioning equipment in real time by camera monitoring device 20, in time note abnormalities, video information and data message carry out remote transmission by internet 22, and the staff can realize digital management and Long-distance Control by wireless telemetry 21 in Control Room.
Claims (3)
1. tension of prestressed tendon hydraulic jack, comprise cylinder barrel, the back-end sealing of cylinder barrel is provided with cylinder cap, the side seal slidable fit has piston rod in the cylinder barrel, one end of annular piston bar extends axially the end face that passes the cylinder barrel front end, on described cylinder cap and piston rod, axially offer respectively and be interconnected, be used to wear the through hole of prestressing tendon, be fixed with on the hole wall of through hole on the described cylinder cap with piston rod on the inner cylinder liner of hole wall sealed sliding running-fit of through hole, it is characterized in that, described cylinder cap is made of shape and described cylinder barrel and the adaptive polystyle pressure sensor of inner cylinder liner, on the inwall of described cylinder barrel, be provided with the card key that cooperates with this polystyle pressure sensor outer peripheral face location, on the front end face of described cylinder barrel, fixedly install the displacement pickup that is useful on the displacement of monitoring piston rod.
2. tension of prestressed tendon hydraulic jack according to claim 1 is characterized in that, axially convexes with the boss that is used for anchoring auxiliary member limit card on the outer face of described polystyle pressure sensor.
3. tension of prestressed tendon hydraulic jack according to claim 1 is characterized in that, passes at described piston rod on the outer face of cylinder barrel and axially offers the annular groove that is used for the limit card moveable anchor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206412816U CN201882850U (en) | 2010-12-03 | 2010-12-03 | Tensioning hydraulic jack with prestressed tendon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206412816U CN201882850U (en) | 2010-12-03 | 2010-12-03 | Tensioning hydraulic jack with prestressed tendon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201882850U true CN201882850U (en) | 2011-06-29 |
Family
ID=44180388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206412816U Expired - Lifetime CN201882850U (en) | 2010-12-03 | 2010-12-03 | Tensioning hydraulic jack with prestressed tendon |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201882850U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808516A (en) * | 2012-08-23 | 2012-12-05 | 中铁十三局集团有限公司 | Tensioning system |
| CN103063174A (en) * | 2011-10-20 | 2013-04-24 | 上海力远计算机科技有限公司 | Wireless prestress tensile elongation measuring device |
| CN103741953A (en) * | 2013-12-20 | 2014-04-23 | 广西科技大学 | Automatic prestress tensioning control system |
| CN106321563A (en) * | 2016-10-27 | 2017-01-11 | 哈尔滨理工大学 | Annular hydraulic cylinder provided with mechanical self-locking devices |
| CN106809759A (en) * | 2017-03-02 | 2017-06-09 | 湖南联智智能科技有限公司 | A kind of preceding clip type jack from dynamometry value |
| CN104649180B (en) * | 2014-06-24 | 2017-07-04 | 柳州市威尔姆预应力有限公司 | Inner blocking type stretch-draw jack and its construction method |
| CN109269884A (en) * | 2018-08-17 | 2019-01-25 | 武汉希萌科技有限公司 | A kind of prestressed stretch-draw preceding clip type jack and tool anchor arrangement |
-
2010
- 2010-12-03 CN CN2010206412816U patent/CN201882850U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063174A (en) * | 2011-10-20 | 2013-04-24 | 上海力远计算机科技有限公司 | Wireless prestress tensile elongation measuring device |
| CN102808516A (en) * | 2012-08-23 | 2012-12-05 | 中铁十三局集团有限公司 | Tensioning system |
| CN103741953A (en) * | 2013-12-20 | 2014-04-23 | 广西科技大学 | Automatic prestress tensioning control system |
| CN104649180B (en) * | 2014-06-24 | 2017-07-04 | 柳州市威尔姆预应力有限公司 | Inner blocking type stretch-draw jack and its construction method |
| CN106321563A (en) * | 2016-10-27 | 2017-01-11 | 哈尔滨理工大学 | Annular hydraulic cylinder provided with mechanical self-locking devices |
| CN106809759A (en) * | 2017-03-02 | 2017-06-09 | 湖南联智智能科技有限公司 | A kind of preceding clip type jack from dynamometry value |
| CN109269884A (en) * | 2018-08-17 | 2019-01-25 | 武汉希萌科技有限公司 | A kind of prestressed stretch-draw preceding clip type jack and tool anchor arrangement |
| CN109269884B (en) * | 2018-08-17 | 2021-08-06 | 武汉希萌科技有限公司 | Pre-clamping jack and tool anchor equipment for prestress tensioning |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110629 |
|
| CX01 | Expiry of patent term |