CN102602841A - General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge - Google Patents
General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge Download PDFInfo
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- CN102602841A CN102602841A CN2011103407158A CN201110340715A CN102602841A CN 102602841 A CN102602841 A CN 102602841A CN 2011103407158 A CN2011103407158 A CN 2011103407158A CN 201110340715 A CN201110340715 A CN 201110340715A CN 102602841 A CN102602841 A CN 102602841A
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Abstract
The invention discloses a general type double-acting penetrating multi-stage piston tensioning jack for a prestressing bridge, relates to a penetrating jack, and particularly relates to a penetrating multi-stage piston tensioning jack for construction of a prestressing bridge. The general type double-acting penetrating multi-stage piston tensioning jack mainly resolves the problems that an existing penetrating jack cylinder is long, the reserved quantity of steel strands is high, the steel strands are wasted, although an internal clamp type jack can save steel strands, steel strand threading wastes time and labor, and the length of a piston is measured inconveniently. The penetrating multi-stage piston tensioning jack comprises an end cap mounted in a tensioning cylinder, a penetrating sleeve, a rear sealing ring, a primary piston, a primary piston front sealing ring and a primary piston end cap, and is characterized in that a secondary piston is arranged on the inner side of the primary piston. The multi-stage pistons are designed, so that the length of a cylinder is reduced, the lengths of exposed portions of steel strands when the bridge is tensioned can be reduced, the steel strands are saved, manufacturing cost of the bridge is reduced, and installation of the general type double-acting penetrating multi-stage piston tensioning jack is identical to that of a common penetrating jack during tensioning.
Description
Technical field
The present invention relates to a kind of feedthrough jack, relate to the prestress bridge specifically with universal double acting feedthrough multi-level piston stretch-draw jack.
Background technology
In the bridge prestress construction, YDC series feedthrough jack is generally all adopted in ground tackle stretch-draw.As shown in Figure 2, the 11st, jack piston, during stretch-draw, steel strand beam-ends (external from anchor plate end face to beam) generally will be reserved the technology length excision of the 800mm left and right sides.After stretch-draw is intact, again with the unnecessary steel strand excision in the outer 20 ∽ 30mm places of work clip sheet.Calculate with high ferro case beam, every hole case beam is totally 249 steel strand, and two ends are totally 498 terminations, needs technology length 398m.
In the bridge prestress construction, steel strand must pass from oil cylinder inside, and jack is all made the feedthrough jack of hollow, and agricultural machinery and elevator machinery all are solid with flexible multistage jack; Can't be used as bridge and use jack, use the feedthrough jack as bridge, oil cylinder length is long, and steel strand reservation amount is big; Cause the steel strand waste, the inner blocking type jack is made by more domestic producers, and is preposition moveable anchor, through being threaded in the punching cover; Though can save steel strand because moveable anchor in punching cover and on the moveable anchor hole more, mounting tools intermediate plate, steel strand; Waste time and energy, in case the slip stripped thread deals with also difficulty; During the bridge prestress construction, need to measure the steel strand elongation, guarantee bridge two ends stretching force basically identical; Measure the steel strand elongation and generally convert through measuring the piston overhang, the inner blocking type jack because during stretch-draw and common feedthrough jack mounting means inconsistent, piston stretches out direction near beam-ends; Therefore measure the piston length inconvenience, waste time and energy, use not a lot based on above reason market.
Summary of the invention
The objective of the invention is in order to overcome above-mentioned deficiency, and a kind of existing mounting means that do not change is provided, shorten oil cylinder length, save steel strand, the prestress bridge that reduces the bridge manufacturing cost is with universal double acting feedthrough multi-level piston stretch-draw jack.
Technical solution of the present invention is: the prestress bridge comprises the end cap that is installed in the tension cylinder with universal feedthrough multi-level piston stretch-draw jack; The punching cover; Back envelope ring; Envelope ring and first stage piston end cap before the first stage piston, first stage piston, it is characterized in that: the inboard at first stage piston is provided with second piston.
First stage piston described in the technical solution of the present invention and second piston are separated by by envelope ring before the back shield on the first stage piston and the orienting sleeve on the first stage piston and the second piston that is located at the second piston front end outside in two cylinder bodies that constitute, and the envelope ring outside is provided with the second piston end cap before the second piston.
The present invention changes multi-level piston into owing to will have the first stage piston of feedthrough jack piston now, promptly in each grade piston, designs the mode of second piston, through the design multi-level piston; Shorten jack length, thus the reduce tool anchor apart from the distance of beam-ends, the protruded length of steel strand when shortening bridge stretch-draw; Therefore, a. has saved steel strand in the bridge prestress construction, and every steel strand two ends are approximately saved about 400 ~ 500mm; Press shared 498 steel strand of the every hole of railway box beam beam and calculate, every hole beam is practiced thrift 249m left and right sides steel strand, and each Liang Chang produces 60 hole beams per month; Can practice thrift 15 tons of steel strand, nearly 100,000 yuan of month saving can reduce the bridge cost greatly; Saved input, reduced productive costs: b. is in the bridge prestress construction, because do not change existing operating mode; Moveable anchor is installed, is taken off conveniently, when occurring losing the anchor stripped thread, can solve fault very soon by existing operating mode; Time saving and energy saving, alleviated working strength of workers.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of common feedthrough jack.
The specific embodiment
As shown in Figure 1; The present invention is by the end cap 1, punching cover 2, back envelope ring 3, first stage piston 4 and the second piston 5 that are installed in the tension cylinder 6; And before the second piston before envelope ring 7, second piston end cap 8, the first stage piston envelope ring 9, first stage piston end cap 10 constitute, end cap 1 is through being threaded in the left end of tension cylinder 6, back envelope ring 3 is contained in the right side of end cap 1; Overlap in punching cover 2 the punching, be fixed on through end cap 1 on the interior circle of back envelope ring 3 as jack; First stage piston 4 is located at the inboard of tension cylinder 6; Second piston 5 is located at the inboard of first stage piston 4; First stage piston 4 is located at respectively by the interior orienting sleeve on back shield on the first stage piston 4 and the first stage piston 4 with second piston 5; Be separated by in two cylinder bodies that constitute with envelope ring 7 before the second piston that is contained in the second piston 5 front ends outsides, the outside of envelope ring 7 is provided with second piston end cap 8 before the second piston; First stage piston 4 is located between the preceding envelope ring 9 of first stage piston in the back envelope ring 3 and the first stage piston 4 front ends outside; The outside of envelope ring 9 is provided with first stage piston end cap 10 before the first stage piston; On tension cylinder 6, radially be provided with oil inlet or return opening A, B, oil inlet or return opening B, A are located at the front and back ends place of tension cylinder 6 respectively.
Principle of work: during the bridge prestress construction, in the left end A of tension cylinder 6 place's oil-feed, right-hand member B place's oil return; Utilize hydraulic oil to irritate oil by force, promote first stage piston 4 and move right together, be i.e. envelope ring 9 one side shiftings before first stage piston with second piston 5; First stage piston 4 seals when encircling 9 left sides before running into first stage piston, does not readvance, and continues from oil inlet A; Utilize hydraulic oil to irritate oil by force, second piston 5 continues to move right, i.e. envelope ring 7 one side shiftings before second piston; Reach the length of stretch-draw requirement, or second piston 5 is run into till the preceding envelope ring of second piston 7 left ends.
When putting anchoring, through in tension cylinder 6 right-hand member B place's oil-feeds, left end A place's oil return; Utilize hydraulic oil to irritate oil by force, promote second piston 5 and be moved to the left, promptly envelope is encircled 3 one side shiftings backward; Run into first stage piston 4 end back shields up to the piston bottom surface, continue, utilize hydraulic oil to irritate oil by force from the B oil-feed; Promote second piston 5 and continue to be moved to the left with first stage piston 4, promptly envelope is encircled 3 one side shiftings backward, till running into back envelope ring 3 end faces.
Claims (2)
1. a prestress bridge comprises the end cap (1) that is installed in the tension cylinder (6), punching cover (2) with universal double acting feedthrough multi-level piston stretch-draw jack; Back envelope ring (3); Envelope ring (9) and first stage piston end cap (10) before the first stage piston (4), first stage piston; It is characterized in that: be provided with second piston (5) in the inboard of first stage piston (4).
2. prestress bridge according to claim 1 is with universal double acting feedthrough multi-level piston stretch-draw jack; It is characterized in that: described first stage piston (4) and second piston (5) be located at respectively and be located at before the second piston in the second piston front end outside envelope ring (7) by the orienting sleeve on back shield on the first stage piston (4) and the first stage piston (4) village and be separated by in two cylinder bodies that constitute, envelope ring (7) outside is provided with second piston end cap (8) before the second piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103407158A CN102602841A (en) | 2011-11-02 | 2011-11-02 | General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103407158A CN102602841A (en) | 2011-11-02 | 2011-11-02 | General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102602841A true CN102602841A (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103407158A Pending CN102602841A (en) | 2011-11-02 | 2011-11-02 | General type double-acting penetrating multi-stage piston tensioning jack for prestressing bridge |
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| CN (1) | CN102602841A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106192768A (en) * | 2016-08-31 | 2016-12-07 | 襄阳中铁宏吉工程技术有限公司 | A kind of hold down gag and steel strand prestress tensioning system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100609844B1 (en) * | 2006-07-04 | 2006-08-08 | (주) 대진유압기계 | Hydraulic jack having double cylinder |
| CN2876046Y (en) * | 2006-03-13 | 2007-03-07 | 何开智 | Bipiston hydraulic hoisting jack |
| CN201351104Y (en) * | 2008-12-25 | 2009-11-25 | 柳州欧维姆机械股份有限公司 | Continuous traction jack |
| CN202390149U (en) * | 2011-11-02 | 2012-08-22 | 襄阳中铁宏吉工程技术有限公司 | Universal difunctional through type multistage piston tensioning jack for pre-stressed bridge |
-
2011
- 2011-11-02 CN CN2011103407158A patent/CN102602841A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2876046Y (en) * | 2006-03-13 | 2007-03-07 | 何开智 | Bipiston hydraulic hoisting jack |
| KR100609844B1 (en) * | 2006-07-04 | 2006-08-08 | (주) 대진유압기계 | Hydraulic jack having double cylinder |
| CN201351104Y (en) * | 2008-12-25 | 2009-11-25 | 柳州欧维姆机械股份有限公司 | Continuous traction jack |
| CN202390149U (en) * | 2011-11-02 | 2012-08-22 | 襄阳中铁宏吉工程技术有限公司 | Universal difunctional through type multistage piston tensioning jack for pre-stressed bridge |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106192768A (en) * | 2016-08-31 | 2016-12-07 | 襄阳中铁宏吉工程技术有限公司 | A kind of hold down gag and steel strand prestress tensioning system |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120725 |