CN202625726U - Large-tonnage jacking-pressing type front-clamping jack - Google Patents
Large-tonnage jacking-pressing type front-clamping jack Download PDFInfo
- Publication number
- CN202625726U CN202625726U CN 201220218182 CN201220218182U CN202625726U CN 202625726 U CN202625726 U CN 202625726U CN 201220218182 CN201220218182 CN 201220218182 CN 201220218182 U CN201220218182 U CN 201220218182U CN 202625726 U CN202625726 U CN 202625726U
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Abstract
The utility model relates to a fixing device, and particularly relates to a large-tonnage jacking-pressing type front-clamping jack. The large-tonnage jacking-pressing type front-clamping jack disclosed by the utility model comprises an oil cylinder housing for an oil cylinder, a piston and a core-penetrating sleeve which are installed in a nesting manner from outside to inside, wherein a limit plate and a working clamping sheet are arranged in an inner hole on the end part of the piston, two groups of bidirectional oil way pipelines are arranged on the oil cylinder housing for the oil cylinder, and the pipelines are communicated with a forward-stroke oil tank and a backward-stroke oil tank respectively. The piston in the large-tonnage jacking-pressing type front-clamping jack disclosed by the utility model is provided with a flow guide channel on a backward-stroke oil cavity, the flow guide channel is communicated with the backward-stroke oil cavity of the stroke of the piston, a jacking-pushing sleeve is arranged between the piston and the core-penetrating sleeve, and the jacking-pushing sleeve is connected with a jacking-pushing disc. The large-tonnage jacking-pressing type front-clamping jack disclosed by the utility model has the advantages that the stable and smooth entrance of a pre-stress anchor device in a self-locked state can be guaranteed in the complex working conditions of field construction because a pre-stress applied on the clamping sheet is of a hydraulic mode, thus greatly improving the safety of a pre-stress tensioning operation; and steel strands can be greatly saved during the use of the large-tonnage jacking-pressing type front-clamping jack.
Description
Technical field
The utility model relates to a kind of anchor fitting, relates in particular to the preceding card of a kind of large-tonnage roof pressure type jack.
Background technology
At present the jack that adopted of many steel strand (greater than 2) prestressed stretch-draw is most is drum type brake punching jack in China, thereby when stretch-draw, adopts positioning plate that intermediate plate is carried out spacingly guaranteeing that with the friction force that increases between intermediate plate and the steel strand prestressed anchor gets into self-locking state smoothly.The preceding cassette jack that minority adopts also just is built into jack inside with positioning plate, though can save a large amount of steel strand, the limit method of intermediate plate is remained common positioning plate.But this mode can not apply very big precompressed compression to intermediate plate; Complex working condition in the open air the phenomenon (just sliding Shu Xianxiang) that prestressed anchor can not get into self-locking state smoothly occurs through regular meeting; This has produced very big potential safety hazard just for the prestressing force pulling process, and a lot of rising because the serious accident of sliding Shu Zaocheng all can be taken place in annual China.
The utility model content
The purpose of the utility model is to the problem that is easy to generate sliding Shu Xianxiang in the prior art; Before being provided, a kind of large-tonnage roof pressure type blocks jack; When prestressed stretch-draw, can in stretch-draw, apply enough big precompressed compression, to guarantee that prestressed anchor can get into self-locking state smoothly to intermediate plate.Thereby the potential safety hazard in the reduction production process, and save employed steel strand.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is following:
Card jack before the large-tonnage roof pressure type of the utility model; Comprise the cylinder shell, piston and the punching cover that are nested with installation from extroversion, cylinder shell is provided with two groups of two-way oil line pipes, and pipeline is connected with process fuel tank and backhaul fuel tank respectively; Described piston is provided with at least one flow-guiding channel on backhaul fuel tank one side; Jack is provided with the pushing tow cover between piston and punching cover, flow-guiding channel is connected with the cavity of piston stroke, and the pushing tow cover is connected with the pushing tow dish.
The both sides of said positioning plate are pushing tow dish and work clip sheet, and work clip sheet is nested to be installed in the work anchor ring.
Be built-in with the top wedge device at the jack front end, during the epitrochoidal chamber fuel feeding, cylinder shell and punching cover are moved to the left the top wedge device and clamp when jack uses, and can save steel strand in a large number thereby can clamp steel strand in the jack front end.During backhaul chamber fuel feeding,, the punching cover can not be moved with cylinder shell, thereby make the backhaul oil pressure promote that pushing tow overlaps and positioning plate moves, compress work clip sheet because of the epitrochoidal chamber pressurize.After backhaul pressure reached setting value, epitrochoidal chamber oil pressure, cylinder shell and punching cover were moved to the left, and the top wedge device unclamps.
The advantage of the utility model is: because the present invention adopts precompressed compression that intermediate plate applied is hydraulic way; The complex working condition of construction can ensure that also prestressed anchor can stablize, get into smoothly self-locking state in the open air, has improved the safety of prestressing force pulling process greatly.And the present invention adopts is the mode of preceding card, thus use can also be a large amount of the time of the present invention the saving steel strand.
Description of drawings
Fig. 1 is the confined state structural representation of the utility model.
1. cylinder shell; 2. working end oil nozzle; 3. working oil chamber; 4. work anchor ring; 5. pushing tow cover; 6. piston; 7. pushing tow dish; 8. positioning plate; 9. work clip sheet; 10. device is carved on the top; 11. flow-guiding channel; 12. backhaul oil nozzle; 13. backhaul oil pocket; 14 punching covers.
The specific embodiment
Card jack before the large-tonnage roof pressure type of the utility model; Comprise the cylinder shell 1, piston and the punching cover 14 that are nested with installation from extroversion; Cylinder shell 1 is provided with two groups of two-way oil line pipes; Pipeline is connected with working oil chamber 3 and backhaul oil pocket 13 respectively, and described piston 6 is provided with at least one flow-guiding channel 11 on backhaul fuel tank 13 1 sides, and jack is provided with pushing tow cover 5 between piston 6 and punching cover 14; Flow-guiding channel 11 is connected with the cavity 15 of piston stroke, and pushing tow cover 5 is connected with pushing tow dish 7.
Be built-in with top wedge device 10 at the jack front end, during the epitrochoidal chamber fuel feeding, cylinder shell 1 is moved to the left top wedge device 10 with punching cover 14 and clamps when jack uses, and can save steel strand in a large number thereby can clamp steel strand in the jack front end.
The both sides of said positioning plate 8 are pushing tow dish 7 and work clip sheet 9, work clip sheet 9 nested being installed in the work anchor ring 4.
During backhaul chamber fuel feeding,, the punching cover can not be moved with cylinder shell, thereby make backhaul oil pocket 13 oil pressure promote pushing tow cover 5 and positioning plate 8 moves, compress work clip sheet 9 because of working oil chamber 3 pressurizes.
After backhaul pressure reached setting value, working oil chamber 3 oil pressure, cylinder shell 1 and punching cover 14 were moved to the left, and top wedge device 10 unclamps.
During work, one. steel strand are passed work anchor ring 4, positioning plate 8, top wedge device 10 earlier; Two. be connected on the output oil pipe of two-way pumping plant respectively on the working end oil nozzle 2 and backhaul oil nozzle 12 on the pump housing; Three. start pumping plant, give the epitrochoidal chamber fuel feeding earlier, the oil pocket of backhaul simultaneously 13 pressure are zero.Cylinder shell 1 is moved to the left with punching cover 14, and top wedge device 10 steps up; Four. after working oil chamber 3 oil pressure reach required pressure, close the valve on the pumping plant, and pressurize; Five. give backhaul oil pocket 13 fuel feeding.Because of the epitrochoidal chamber pressurize, cylinder shell 1 and punching cover 14 can not be moved.Thereby make backhaul oil pocket 13 have oil pressure, and move with positioning plate 8 through flow-guiding channel 11 promotion pushing tow covers 5.Thereby compress work clip sheet 9; Six. after backhaul oil pocket 13 pressures reach required pressure, make the epitrochoidal chamber off-load.Cylinder shell 1 moves right with punching cover 14, and top wedge device 10 unclamps.Take down jack.Both finished the work.
Increased a hydraulic actuating cylinder on the basis of this structure cassette jack before original in jack inside; Finish by the hydraulic actuating cylinder that increases newly intermediate plate to be applied a precompressed compression before the jack backhaul in stretch-draw; Thereby prestressed anchor can get into self-locking state smoothly when promptly having guaranteed prestressed stretch-draw; Stop the potential safety hazard of sliding bundle, can save a large amount of steel strand again.
Claims (3)
1. block jack before a large-tonnage roof pressure type; Comprise the cylinder shell, piston and the punching cover that are nested with installation from extroversion; Cylinder shell is provided with two groups of two-way oil line pipes; Pipeline is connected with process fuel tank and backhaul fuel tank respectively, it is characterized in that: described piston (6) is provided with at least one flow-guiding channel (11) on backhaul fuel tank (13) one sides, and jack is provided with pushing tow cover (5) between piston (6) and punching cover (14); Flow-guiding channel (11) is connected with the cavity (15) of piston stroke, and pushing tow cover (5) is connected with pushing tow dish (7).
2. the card jack is characterized in that: be built-in with top wedge device (10) at the jack front end before the large-tonnage roof pressure type as claimed in claim 1.
3. card jack before the large-tonnage roof pressure type as claimed in claim 1, it is characterized in that: the both sides of said positioning plate (8) are pushing tow dish (7) and work clip sheet (9), work clip sheet (9) is nested to be installed in the work anchor ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218182 CN202625726U (en) | 2012-05-16 | 2012-05-16 | Large-tonnage jacking-pressing type front-clamping jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220218182 CN202625726U (en) | 2012-05-16 | 2012-05-16 | Large-tonnage jacking-pressing type front-clamping jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202625726U true CN202625726U (en) | 2012-12-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220218182 Expired - Lifetime CN202625726U (en) | 2012-05-16 | 2012-05-16 | Large-tonnage jacking-pressing type front-clamping jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202625726U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591026A (en) * | 2015-01-21 | 2015-05-06 | 巨隆液压设备(集团)有限公司 | Double-stroke and double-thrust hydraulic jack |
| CN104909300A (en) * | 2015-05-14 | 2015-09-16 | 柳州泰姆预应力机械有限公司 | Intelligent front clamping type jack enabling construction to be achieved conveniently |
| CN108193883A (en) * | 2018-01-08 | 2018-06-22 | 中交三公局第工程有限公司 | Flat hogging moment steel strand wires jack |
| CN108468276A (en) * | 2018-02-01 | 2018-08-31 | 重庆恒佳工程技术咨询有限公司 | A kind of two-way jack-up system of prestressing force intelligent tensioning |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
-
2012
- 2012-05-16 CN CN 201220218182 patent/CN202625726U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591026A (en) * | 2015-01-21 | 2015-05-06 | 巨隆液压设备(集团)有限公司 | Double-stroke and double-thrust hydraulic jack |
| CN104909300A (en) * | 2015-05-14 | 2015-09-16 | 柳州泰姆预应力机械有限公司 | Intelligent front clamping type jack enabling construction to be achieved conveniently |
| CN108193883A (en) * | 2018-01-08 | 2018-06-22 | 中交三公局第工程有限公司 | Flat hogging moment steel strand wires jack |
| CN108468276A (en) * | 2018-02-01 | 2018-08-31 | 重庆恒佳工程技术咨询有限公司 | A kind of two-way jack-up system of prestressing force intelligent tensioning |
| CN117486114A (en) * | 2024-01-03 | 2024-02-02 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
| CN117486114B (en) * | 2024-01-03 | 2024-03-05 | 河南丽卡数控设备有限公司 | Multi-hole front clamping jack |
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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: 20121226 |
|
| CX01 | Expiry of patent term |