CN1374246A - Steel bar tensing jack - Google Patents
Steel bar tensing jack Download PDFInfo
- Publication number
- CN1374246A CN1374246A CN 02112856 CN02112856A CN1374246A CN 1374246 A CN1374246 A CN 1374246A CN 02112856 CN02112856 CN 02112856 CN 02112856 A CN02112856 A CN 02112856A CN 1374246 A CN1374246 A CN 1374246A
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- CN
- China
- Prior art keywords
- piston rod
- steel bar
- jack
- clamping plate
- train wheel
- 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.)
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Abstract
The steel bar tensing jack for pre-stress tension of steel bar consists of hydraulic cylinder, piston rod, upper clamping plate block and lower clamping plate block. The hydraulic cylinder has cylinder in the lower part of the upper clamping plate block; the piston rod has one end connected to piston inside the cylinder and the other end fixed by one screw nut onto the lower clamping plate block; both the upper clamping plate block and the lower clamping plate block have U-shaped cross section and bearing nut in the central hole; and the cylinder and the piston rod are distributed beside the tensed steel bar. There are linings between the piston rod and each clamping plate block, oil returning port and oil feeding port.
Description
One, technical field
The present invention is a kind of jack that is used for the rod iron prestressed stretch-draw, belongs to the Construction of Civil Engineering mechanical equipment
Technical field.
Two, background technology
In civil engineering structure, two ends band fork ear pin joint, the centre can be used as suspension rod, pull bar, structure bridging etc. with the rod iron of positive and negative coupling bush after applying prestress.
How rod iron to the two ends pin joint applies prestress at middle part coupling bush place, does not domesticly see its similar tensioning equipment.There is similar steel bar tensing jack in the MACALLOY company of external Britain.The stretch-draw jack of MACALLOY company adopts the clamping plate piece to be recessed the monolithic construction of four oil cylinders, adopts rated oil pressure to reach the superelevation oil pressure of 135MPa.The shortcoming of this stretch-draw jack is: 1. rated oil pressure is too high, and the superelevation oil pressure of 135MPa requires too highly to sealing member, and not being suitable for the civil engineering rated oil pressure is the prestressed stretch-draw oil pump of 60MPa.2. rod iron has serial size, and serial stretching force is also arranged.The intraplate four cylinder integral tension jack commonalities of recessed folder are not strong, are not easy to the serial stretching force that flexible combination becomes to be applicable to the different rod footpath.
Three, technology contents
1, goal of the invention:
The object of the invention provides a kind of and common prestressed stretch-draw oil pump rated oil pressure 60MPa and is complementary, and little jack cylinder and clamping plate piece apart arrangement realize the steel bar tensing jack of different rod footpath and stretching force flexible combination.
2, technical scheme:
The present invention is a kind of steel bar tensing jack, by hydraulic actuating cylinder, piston rod and last fixture block, following fixture block is formed, the cylinder body of hydraulic actuating cylinder is positioned at the bottom of train wheel bridge piece, one end of piston rod is connected with piston and is arranged in cylinder body, the other end of piston rod is fixed on the lower plate piece by adjustment nut, the cross-sectional plane of train wheel bridge piece and lower plate piece is " U " shape, central hole at train wheel bridge piece and lower plate piece is respectively equipped with the pressure-bearing nut, cylinder body and piston rod are symmetrically distributed in outside the rod iron axis that is tightened up, the cylinder body that is positioned at train wheel bridge piece bottom has 4, be symmetrically distributed in outside the axis of the rod iron that the axle center of train wheel bridge piece promptly is tightened up, be lined with lining between piston rod and the train wheel bridge piece and between piston rod and the lower plate piece, the side of cylinder body is provided with oil return nozzle, is provided with inlet nozzle in the rearward end of cylinder body.
3, technique effect:
Steel bar tensing jack of the present invention will be owing to will clamp the piston rod that the feedthrough pull bar of upper and lower clamping plate piece changes the little jack of pipe link double as into, obtain being used for the maximum functional piston area of stretch-draw, under the condition of rated oil pressure 60MPa, obtained the maximum stretching force identical with external like product.
Steel bar tensing jack of the present invention also owing to adopted four or two little jacks and clamping plate apart arrangement, can dispose the little jack of different tension tonnages neatly, and not need to change clamping plate; Or do not change little jack, and only change the not high upper and lower clamping plate piece size of processing request, realized being applicable to the series of combination of different rod footpath and tension tonnage, further improved the field of application of jack.
Four, description of drawings
Fig. 1 is an overall structure scheme drawing of the present invention.Little jack 1 is wherein arranged, train wheel bridge piece 2, lower plate piece 3, piston rod 4, inlet nozzle 5, oil return nozzle 6, locating dowel pin 7, piston 8, jack end cap 9, adjustment nut 10, rod iron 11, positive and negative tooth coupling bush 12, pressure-bearing nut 13, lining 16, cylinder body 17.
Fig. 2 is an end face structure scheme drawing of the present invention.Multiport valve 14, oil pipe 15 are wherein arranged.
Five, the specific embodiment
Claims (4)
1, a kind of steel bar tensing jack, by hydraulic actuating cylinder, piston rod and last fixture block, following fixture block is formed, it is characterized in that the cylinder body (17) of hydraulic actuating cylinder is positioned at the bottom of train wheel bridge piece (2), one end of piston rod (4) is connected with piston (8) and is arranged in cylinder body (17), the other end of piston rod (4) is fixed on the lower plate piece (3) by adjustment nut (10), the cross-sectional plane of train wheel bridge piece (2) and lower plate piece (3) is " U " shape, central hole at train wheel bridge piece (2) and lower plate piece (3) is respectively equipped with pressure-bearing nut (13), and cylinder body (17) and piston rod (4) are symmetrically distributed in outside rod iron (11) axis that is tightened up.
2, steel bar tensing jack according to claim 1 is characterized in that the cylinder body (17) that is positioned at train wheel bridge piece (2) bottom has 4, is symmetrically distributed in outside the axis of the rod iron (11) that the axle center of train wheel bridge piece (2) promptly is tightened up.
3, steel bar tensing jack according to claim 1 is characterized in that being lined with lining (16) between piston rod (4) and the train wheel bridge piece (2) and between piston rod (4) and the lower plate piece (3).
4, steel bar tensing jack according to claim 1 is characterized in that the side of cylinder body (17) is provided with oil return nozzle (6), is provided with inlet nozzle (5) in the rearward end of cylinder body (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021128561A CN1139534C (en) | 2002-04-08 | 2002-04-08 | Steel bar tensing jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021128561A CN1139534C (en) | 2002-04-08 | 2002-04-08 | Steel bar tensing jack |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1374246A true CN1374246A (en) | 2002-10-16 |
| CN1139534C CN1139534C (en) | 2004-02-25 |
Family
ID=4742300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021128561A Expired - Fee Related CN1139534C (en) | 2002-04-08 | 2002-04-08 | Steel bar tensing jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1139534C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274329A (en) * | 2013-05-29 | 2013-09-04 | 南京工程学院 | Jacking-and-pulling jack and construction method applying jacking-and-pulling jack to pile-anchor support |
| CN110094381A (en) * | 2019-04-24 | 2019-08-06 | 中冶建筑研究总院有限公司 | A kind of multi-cylinder integral type prestressed stretch-draw jack side by side |
-
2002
- 2002-04-08 CN CNB021128561A patent/CN1139534C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103274329A (en) * | 2013-05-29 | 2013-09-04 | 南京工程学院 | Jacking-and-pulling jack and construction method applying jacking-and-pulling jack to pile-anchor support |
| CN103274329B (en) * | 2013-05-29 | 2016-03-23 | 南京工程学院 | A kind of top draws jack for the construction method of pile-anchor retaining |
| CN110094381A (en) * | 2019-04-24 | 2019-08-06 | 中冶建筑研究总院有限公司 | A kind of multi-cylinder integral type prestressed stretch-draw jack side by side |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1139534C (en) | 2004-02-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Shen Lian Document name: Notice of first review |
|
| AR01 | Abandonment of patent right to avoid double patenting |
According to article 9 of the patent law and article 13 of the detailed rules for the implementation of the patent law: 2112856.1 of the invention patents in this issue as a notice of authorization, and at the same time corresponding to the 02219813.X utility model patent to be given up, and in the 20 volume of the 08 issue of the new type of communique on the patent right to abandon the announcement. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040225 Termination date: 20130408 |