CN2224833Y - Straining jack - Google Patents
Straining jack Download PDFInfo
- Publication number
- CN2224833Y CN2224833Y CN 94247288 CN94247288U CN2224833Y CN 2224833 Y CN2224833 Y CN 2224833Y CN 94247288 CN94247288 CN 94247288 CN 94247288 U CN94247288 U CN 94247288U CN 2224833 Y CN2224833 Y CN 2224833Y
- Authority
- CN
- China
- Prior art keywords
- face
- lever assembly
- panel
- decomp
- decomp lever
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Bridges Or Land Bridges (AREA)
Abstract
The utility model relates to a jack for operation, which can make a plurality of stranded wires obtain equal stretching force and belongs to the technical field of operation machines. The utility model is composed of a cylinder, an end plate, a plug screw baffle ring, decompression lever components at end surfaces, a piston push rod, sealing components, tool anchor components, a hydraulic transmission system, supporting legs, etc. Each steel stranded wire in a steel stranded wire bunch can be stretched with equal force in the way of asynchronism; therefore, the efficiency of the stranded wire bunchcan be fully utilized, and the construction quality of a project can be ensured. A plurality of decompression levers at end surfaces are arranged in the utility model to reduce the axial thrust which hydraulic media exert on the end plate and is borne by the plug screw baffle ring, which supplies convenience to structure design, strength design and material selection.
Description
The utility model relates to a kind of with employed many ropes on the load, the work tool that club obtains to equate stretching force or propelling thrust of directly acting on of operations such as lifting, traction, pushing tow, belongs to the Work machine technical field.It can be widely used in engineerings such as building, hydro-structure, Prestressed Concrete Bridges, Excitations for Long Span Suspension, side slope, the dam foundation and carry out the technology implementation that bury at the prestressed anchor reinforcement place, and being specially adapted to adopt many steel strand is that a branch of prestress anchorage cable adds the technology implementation that bury at all places.
At present, the lot of domestic and international engineering item all adopts prestress anchorage cable to add same technical finesse.Prestressed anchor reinforcement is to realize by the chucking of the pretension stretch-draw of steel strand and ground tackle is located, and in order to improve the effect that anchor cable reinforces and the quality of engineering, the steel strand of use are many and are a branch of steel wire bundle.Existing anchor mainly contains dual mode with technology to the pretension stretch-draw of steel wire bundle: first synchronous mode integral tension; It two the asynchronous stretch-draw of power such as is.The result of synchronous mode integral tension is different by the tension stress of each intrafascicular root steel strand of the guiding principle twisted wire of stretch-draw, can guarantee to be equated by the tension stress of intrafascicular each the root steel strand of guiding principle twisted wire of stretch-draw etc. the result of the asynchronous stretch-draw of power.
Chinese patent 932461263,932461271 described " the asynchronous jack of power such as single cylinder bull ", " device is drawn on the asynchronous top of power such as many bars of single cylinder ", can the asynchronous stretch-draw of power such as implement simultaneously to each the root steel strand in the steel wire bundle, but there is such shortcoming: oil-filled pressurization in its cylinder body, can be to asynchronous stretch-draw of power such as steel wire bundle enforcements, hydraulic medium has also applied thrust (pressure) along axis direction to end plates, the operation pressure of hydraulic medium is big more, and then the axial thrust that acts on the end plates of hydraulic medium is also big more.The axial thrust that hydraulic medium imposes on the end plates will be born with the screw thread that connects of cylinder body by the plug screw baffle ring, and the screw thread that cooperates is bearing hydraulic medium and acting on axial thrust on the end plates so plug screw baffle ring and cylinder body link.When the operation pressure of big (diameter that is end plates is bigger), hydraulic medium is higher the aperture of cylinder body, then this thrust is just very big, strengthen difficulty for the structure design and the choosing of material of jack, also strengthened the leading dimensions of jack, increased cost usefulness.
The purpose of this utility model is that provide for the shortcoming that overcomes prior art a kind of can the asynchronous stretch-draw of power such as implement simultaneously to each the root guiding principle twisted wire in the steel wire bundle, can reduce the novel stretch-draw jack that hydraulic medium that the plug screw baffle ring born acts on the axial thrust on the end plates again.
The utility model can be realized by following measure: this jack is made up of cylinder body, end plates, plug screw baffle ring, end face decomp lever assembly, piston mandril, poted assemblies, moveable anchor assembly, the power hydraulic system that comprises compression indicator, feet etc.The cylinder body that is assembled together, end plates, plug screw baffle ring, end face decomp lever assembly, piston mandril, poted assemblies etc. constitute a pressure chamber, the variable section position that exterior contour is a plurality of piston mandrils of stepped shaft shape is in the pressure chamber, driven by a cover power hydraulic system, each piston mandril cooperates the tractive end of load line of jack-up (as steel strand etc.) through the moveable anchor assembly.The difference of the area of a circle that cylindrical surrounded of piston mandril enlarged diameter section and the area of a circle that cylindrical surrounded of reduced diameter section is an effective cross sectional area.According to the hydraulic principle, the product of the effective cross sectional area of piston mandril and the operation pressure of hydraulic medium (pressure) has determined hydraulic medium to the size of piston mandril along its axis direction thrust, as long as the structure of each piston mandril is identical, effective cross sectional area equates that then hydraulic medium also equates the axial thrust of each piston mandril.A kind of version of end face decomp lever is: the round bar (or pipe) that its outer body profile is a cylindrical shape; Another kind of version is: its outer body profile is the stepped shaft shape, and the variable section position is in the pressure chamber, should note avoiding and the piston mandril of making back and forth movement when working is collided.The end face decomp lever that the outer body profile is the stepped shaft shape can directly be made into integrative-structure, also can be made into that two bodies connect by screw thread fit again and into a single integrated structure.No matter be the end face decomp lever of any version, all to there be screw thread to connect or a chimb that diameter is bigger is arranged at its two-end part with nut, so that the end face decomp lever is located, prevent to skid off.The piston mandril of installing in the through hole on end plates is equipped with miscellaneous part can be to asynchronous stretch-draw of power such as steel strand enforcements, and the end face decomp lever of installing can reduce the axial thrust of hydraulic medium to end plates, promptly reduce the load of plug screw baffle ring, reduce the link load of the screw thread that cooperates of plug screw baffle ring and cylinder body.
Structural representation of the present utility model is seen Fig. 1.Cylinder body (1) is a thick cyclinder, two-end part of circular hole has front console (2) and rear end panel (3) in it, preceding plug screw baffle ring (4) and back plug screw baffle ring (5) connect with cylinder body (1) by screw thread, and front console (2) and rear end panel (3) directionality is arranged are fixed tightly in the cylinder body (1).Have on forward and backward two ends panel (2,3) that quantity equates, the cooresponding each other axially extending bore in orientation, the quantity in hole what and position distribution are looked the performance requriements of jack and are easy to processly made by design.These holes can be divided into two classes by the purposes difference.First kind hole is used for installing piston mandril (7), and the structure of this class hole and piston mandril (7) and assembly relation etc. are existing elaborating in some patents (as 932461271,932461263) specification sheets.The second class hole is used for installing end face decomp lever assembly (6), promptly the orientation on forward and backward two ends panel (2,3) identical cooresponding each other each an end face decomp lever assembly (6) respectively is installed in to axially extending bore.Difference by the outer body contour shape of end face decomp lever assembly (6) can be divided into it two kinds again, the match diameter at position of the two ends of first kind of end face decomp lever assembly (6) and through hole on the front and back ends panel (2,3) equates, certainly, axially extending bore aperture that this end face decomp lever assembly (6) is installed also equates being used on the front and back ends panel (2,3).The structural system that this (first kind) end face decomp lever assembly (6) is installed abbreviates uniform cross section end face decomp lever structure as.Match with through hole on the front and back ends panel (2, the 3) diameter at position of the two ends of second kind of end face decomp lever assembly (6) is unequal, its enlarged diameter section matches with through hole on the front console (2), reduced diameter section matches with through hole on the rear end panel (3), certainly the aperture that is used to install the axially extending bore on the front and back ends panel (2,3) of this end face decomp lever assembly (6) is also unequal, and the through-hole aperture on the front console (2) is greater than the through-hole aperture on the rear end panel (3).The structural system that this (second kind) end face decomp lever assembly (6) is installed abbreviates unequal section end face decomp lever structure as.
The pressure chamber (14) of power hydraulic system (10) in cylinder body (1) injects hydraulic medium, because the effect of front and back ends panel (2,3), forward and backward plug screw baffle ring (4,5), end face decomp lever assembly (6), piston mandril (7), poted assemblies (8), hydraulic medium can not be from the introversive outer seepage of pressure chamber (14), then operation pressure rising.In the process of the operation pressure that increases hydraulic medium, piston mandril (7), moveable anchor assembly (9), work anchor assembly (15), feet (11), backhaul oil cylinder (13), limit switch parts such as (12) cooperatively interact, can be to the asynchronous stretch-draw of power such as each root steel strand (16) enforcement of steel wire bundle, all reach rated value up to the tension stress of steel strand (16).In the oil-filled pressure process of pressure chamber (14), owing to there is end face decomp lever assembly (6) to be installed in the axially extending bore on the front and back ends panel (2,3), so forward and backward two ends panel (2,3) bears the medial surface of hydraulic medium and the area of contact of hydraulic medium reduces, promptly hydraulic medium acts on the stagnation pressure reduction on the forward and backward two ends panel (2,3).If what install is uniform cross section end face decomp lever structure, because installing the aperture of the axially extending bore of end face decomp lever assembly (6), equate being used on forward and backward two ends panel (2,3), then forward and backward two ends panel (2,3) is also equal to the axial thrust of forward and backward two ends panel (2,3) because of the corresponding hydraulic medium that reduces of uniform cross section end face decomp lever assembly (6) is installed, in such cases, there is not responsive to axial force on end face decomp lever assembly (6).If what install is unequal section end face decomp lever structure, it is unequal that being used on forward and backward two ends panel (2,3) installed the aperture of axially extending bore of end face decomp lever assembly (6), goes up because of the corresponding hydraulic medium that reduces of unequal section end face decomp lever assembly (6) is installed also unequal to the axial force of forward and backward two ends panel (2,3) at forward and backward two ends panel (2,3).Because the outer body profile of unequal section end face decomp lever assembly (6) is the stepped shaft shape, according to hydraulic principle, when hydraulic medium has operation pressure, then hydraulic medium has an axial thrust to unequal section end face decomp lever assembly (6), this thrust will make unequal section end face decomp lever assembly (6) move to its big extreme direction (being the direction of forward end panel (2)), because of the end (in the non-side that is subjected to hydraulic pressure of rear end panel (3)) of the thin part of unequal section end face decomp lever assembly (6) diameter has screw nut to match, then this makes end face decomp lever assembly (6) will pass to rear end panel (3) by nut to the thrust that its big extreme direction moves, and then offset the axial thrust that a part of hydraulic medium gives rear end panel (3), so just reduced the link workload of the screw thread that cooperates of back plug screw baffle ring (5) and cylinder body (1) effectively.If feet (11) is supported on cylinder body (1) the jack whole set of etc.ing on the work anchor assembly (15) by plug screw baffle ring (4) before directly supporting, then preceding plug screw baffle ring (4) and cylinder body (1) axial thrust that hydraulic medium that the screw thread that cooperates bears acts on the front console that links descends more obviously.Make the size of this thrust that unequal section end face decomp lever assembly (6) moves to its big extreme direction, the difference of the sectional area of, rear end panel (2,3) matching part the same with its two ends is relevant, also relevant with the size of hydraulic medium operation pressure.Down, responsive to axial force is arranged on unequal section end face decomp lever assembly (6) in working order.
Accompanying drawing drawing of the present utility model is described as follows:
Fig. 1 is the axial section of this novel stretch-draw jack.Wherein end face decomp lever assembly (6) is a unequal section end face decomp lever structure.
Fig. 2 is an A-A transverse cross-sectional view among this jack Fig. 1.
Fig. 3 is this jack localized axial section-drawing.End face decomp lever assembly (6) shown in the figure is the unequal section end face decomp lever structure of another kind of form.
Fig. 4 is this jack localized axial section-drawing.End face decomp lever assembly (6) shown in the figure is a uniform cross section end face decomp lever structure.
Referring to the structure of the represented novel stretch-draw jack of attached Fig. 1 and 2, wherein:
1-cylinder body, 2-front console
3-rear end panel 4-preceding plug screw baffle ring
5-back plug screw baffle ring 6-end face decomp lever assembly
7-piston mandril, 8-poted assemblies
9-moveable anchor assembly, 10-power hydraulic system
11-feet, 12-limit switch
13-backhaul oil cylinder, 14-pressure chamber
15-work anchor assembly, 16-steel strand.
The utility model is an example with the jack with six piston mandrils, five end face decomp lever assemblies, promptly as shown in Figure 1, 2.
This novel stretch-draw jack has the following advantages:
1, use this jack to carry out the technology implementation that prestressed anchor reinforcement is handled, in the process of stretch-draw steel strand, draw pine earlier, the back tension, control to always moving by pine, tension stress size up to every steel strand all equates, and reaches specified stretching force, and its difference is within ± 1%.So this jack
(1) can give full play to the usefulness of every steel strand, make full use of material, economical with materials.
(2) can make every steel strand all reach the stretching force that design standard requires, the distribution of stress of steel strand is even, and the single hole anchor force is guaranteed the construction quality of engineering accurately and reliably.
(3) can accurately control the state of stress of every stretch-draw steel strand at any time, in the construction operation process, safe and reliable, progress is fast at the scene.
2, this key problem in technology that the stress of every stretch-draw steel strand is all equated each other, be that self structure and technical characterictic by this jack guarantees, be not subjected to artificial factor, so less demanding to the staff's that implements the stretch-draw operation technical standard.
3,, series of products can be set, several at least of the radicals of stretch-draw steel strand, tens, tens at most, up to a hundred according to requirement of engineering; The total pulling force of a branch of steel strand is that the single hole anchor force can be by tens thousand of thousand Ns of thousands of oxen, tens of thousand Niu Zhizhi.
4, for some engineering item, be under the prerequisite of a determined value in total anchor force, can be by increasing the steel strand radical in a branch of steel strand, strengthen the total pulling force of a branch of steel strand, promptly strengthen the single hole anchor force,, save the funds spending of engineering to reduce the quantity of steel wire bundle.
Claims (3)
1, a kind of novel stretch-draw jack, by cylinder body, front console, the rear end panel, preceding plug screw baffle ring, back plug screw baffle ring, end face decomp lever assembly, piston mandril, poted assemblies, the moveable anchor assembly, power hydraulic system, feet, limit switch, formations such as backhaul oil cylinder, it is characterized in that on front console (2) and rear end panel (3), having quantity to equate, the cooresponding each other axially extending bore in orientation, identical at front console (2) with orientation on the rear end panel (3), cooresponding each other each in the axially extending bore, each installs an end face decomp lever assembly (6).
2, novel stretch-draw jack as claimed in claim 1, it is characterized in that identical, cooresponding each aperture that is used to install end face decomp lever assembly (6) each other, orientation on forward and backward two ends panel (2,3) to axially extending bore, equate, and the match diameter at position of axially extending bore with on the forward and backward two ends panel (2,3) at end face decomp lever assembly (6) two ends that are mounted also equates.
3, novel stretch-draw jack as claimed in claim 1, it is characterized in that the orientation on forward and backward two ends panel (2,3) is identical, cooresponding each other each aperture that is used to install end face decomp lever assembly (6) to axially extending bore, be unequal, and be that through-hole aperture on the front console (2) is greater than the through-hole aperture on the rear end panel (3), the outer body profile of the end face decomp lever assembly (6) that is mounted is the stepped shaft shape, its enlarged diameter section cooperates with through hole on the front console (2), and reduced diameter section cooperates with through hole on the rear end panel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247288 CN2224833Y (en) | 1994-12-30 | 1994-12-30 | Straining jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94247288 CN2224833Y (en) | 1994-12-30 | 1994-12-30 | Straining jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2224833Y true CN2224833Y (en) | 1996-04-17 |
Family
ID=33852551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94247288 Expired - Fee Related CN2224833Y (en) | 1994-12-30 | 1994-12-30 | Straining jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2224833Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424003C (en) * | 2004-01-13 | 2008-10-08 | 柳州海威姆建筑机械有限公司 | Pretightening method of hoist steel strand for continuous hoist jack |
| CN106224319A (en) * | 2016-08-26 | 2016-12-14 | 扬州市振东电力器材有限公司 | By-pass type hydraulic line tightening oil cylinder |
-
1994
- 1994-12-30 CN CN 94247288 patent/CN2224833Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424003C (en) * | 2004-01-13 | 2008-10-08 | 柳州海威姆建筑机械有限公司 | Pretightening method of hoist steel strand for continuous hoist jack |
| CN106224319A (en) * | 2016-08-26 | 2016-12-14 | 扬州市振东电力器材有限公司 | By-pass type hydraulic line tightening oil cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2224833Y (en) | Straining jack | |
| CN101210414B (en) | Fastening positioning device for suspension bridge main cable construction | |
| CN2172761Y (en) | Asynchronous traction device | |
| CN116240942B (en) | Bulldozing equipment for roadbed construction | |
| CN2203966Y (en) | Single cylinder multi-head jack | |
| CN2788999Y (en) | Centrifugal concret square pile mould | |
| CN2577032Y (en) | Threaded connection pretightening structure | |
| CN2179406Y (en) | Static hydraulic pile puller | |
| CN2183987Y (en) | Asynchronous lifter with single cylinder and muti-rod | |
| CN210178779U (en) | Coupling convenient to detach on deep-well pump | |
| CN2640749Y (en) | Safety anti-falling controller for hydraulic press slider | |
| CN209762211U (en) | Planet carrier with pre-tightened stand column | |
| RU2105661C1 (en) | Screw-type remover | |
| CN211312198U (en) | Stay cable anchoring traction device of large-span cable-stayed bridge | |
| CN214870188U (en) | Dismounting device of piston | |
| CN201334748Y (en) | Hand-held squeezing and connecting device of piston-type split threaded sleeve | |
| CN206065166U (en) | 300T gate-type forcing presses | |
| CN215432421U (en) | Mining hydraulic pin puller | |
| CN111075369A (en) | Return-stroke-free tubular column tripping device and under-pressure operation system | |
| CN210173446U (en) | Traction device | |
| CN210978744U (en) | Fixing device for reducing friction between stand column and oil pipe | |
| CN2773176Y (en) | Power-increasing squeezing expander | |
| CN220179224U (en) | Pin puller for pin of mining machinery equipment | |
| CN217732539U (en) | Jack loosening and clamping component of lifting jack | |
| CN212689031U (en) | Rigid connecting piece connected to upper and lower reinforcement cages of load box |
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 |