CN203682980U - Front-locating penetrating type hydraulic jack - Google Patents
Front-locating penetrating type hydraulic jack Download PDFInfo
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- CN203682980U CN203682980U CN201420044266.1U CN201420044266U CN203682980U CN 203682980 U CN203682980 U CN 203682980U CN 201420044266 U CN201420044266 U CN 201420044266U CN 203682980 U CN203682980 U CN 203682980U
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- hydraulic jack
- anchor ring
- piston body
- cover
- outer cylinder
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Abstract
The utility model discloses a front-locating penetrating type hydraulic jack. The front-locating penetrating type hydraulic jack is characterized by comprising a penetrating cover, a piston body, an outer cylinder cover and a transition cover, the penetrating cover is sleeved with the piston body, the piston body is sleeved with the outer cylinder cover, the transition cover is located on the front end face of the piston body, the piston body and the transition cover are fixedly connected to form a fixed body, the transition cover is provided with a working anchor ring with a clamping piece, the penetrating cover and the outer cylinder cover are fixedly connected to form a movable body relative to the piston body, and a tool anchor ring with a clamping piece is fixedly connected to the front end inside the penetrating cover. The front-locating penetrating type hydraulic jack has the advantages of being high in safety coefficient and mounting and dismounting efficiency, the working length of each steel strand at each end of a beam is greatly reduced, and cost is saved.
Description
Technical field
The utility model relates to hydraulic jack, is specifically related to a kind of preposition feed-through hydraulic jack being applied in building, science of bridge building.
Background technology
Since the eighties in 20th century, prestressed concrete is widely used in the modern projects such as large public building, high level and high-rise building, Longspan Bridge and multi storied industrial factory building.Especially the circuit major part of express highway, high speed railway special line is made up of bridge, and the major bearing structures of bridge adopts prestressed reinforced concrete construction.At present, form the system of a set of uniqueness at aspects such as design theory, method of calculating, member series, structural system, tensioning rollering fastening system, prestressing techniques, prestressing tendon and the concrete materials of prestressed concrete: aspect the operating technique and construction management of prestressed concrete, accumulated rich experience.This wherein, prefabricated for simple prestressed concrete beam, is that jack has become indispensability as tensioning equipment by special tensioning equipment application of stress.
In pre existing stress tension technological process, general tensioning equipment is two circle feed-through hydraulic jacks as shown in Figure 1 at present, and the instrument anchor ring 2 on it and tool clamping piece 1 are placed on the rear end of jack 4.The major technique defect of this kind equipment is:
One, safety factor is low, and safety control is subject to human element more, and because of instrument anchor ring 2 and tool clamping piece 1 external, in the time there is tool clamping piece 1 explosion, relic splashes region within the scope of 45 degree, and the speed per hour of splashing, up to 100 ~ 150km, causes very large potential safety hazard to operating personal and pedestrian;
Two, to expose usable length long for steel strand, and cost drops into larger;
Three, in stretch-draw and maintenance process, dismounting is comparatively loaded down with trivial details, and work efficiency is general.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, a kind of preposition feed-through hydraulic jack is provided, this hydraulic jack is by being placed on hydraulic jack front end by work anchor ring, and instrument anchor ring is built in to the punching cover interior forward end of hydraulic jack, to shorten steel strand usable lengths, and by flying chip, fly beam control in punching cover internal cavities.
The utility model object realizes and being completed by following technical scheme:
A kind of preposition feed-through hydraulic jack, it is characterized in that described hydraulic jack comprises punching cover, is sheathed on described punching and overlaps peripheral piston body, be sheathed on the outer cylinder sheath of described piston body periphery and be positioned at the spacer shell on described piston body front end face, wherein said piston body and not kinetoplast of the affixed formation of described spacer shell are provided with the work anchor ring with intermediate plate on described spacer shell; Described punching cover and the movable body of the affixed formation of described outer cylinder sheath with respect to described piston body, at described punching cover, Inner Front End place is connected with the instrument anchor ring with intermediate plate.
In described punching cover, there is cavity at described instrument anchor ring rear.
The rearward end of described punching cover is provided with safety screen that can opening and closing.
Described punching cover, described piston body, described outer cylinder sheath, described work anchor ring and described instrument anchor ring have same central axis.
Affixed for being threaded between described instrument anchor ring and described punching cover internal face.
Described intermediate plate is the intermediate plate of clamping steel strand.
The utility model has the advantages that:
1. this hydraulic jack adopts three circle feedthrough structures, instrument anchor ring is built in to the front end of hydraulic jack, and in the rear end of hydraulic jack, safety screen is set, to guarantee that intermediate plate is in the time occurring explosion, can be by flying chip, fly beam control within the scope of cylinder body, reach safety precaution double insurance, thoroughly eliminated potential safety hazard;
2. instrument anchor ring is built in the front end place of hydraulic jack, and with the Distance Shortened of positioning plate, after tested, the every end single steel strand of beam body usable length can shorten 350mm;
3. the anchor ring of working is placed on hydraulic jack front end, when under stretch-draw bundle steel strand radical same case without changing work anchor ring, reduced the dismounting number of times of work anchor ring, three-chip type intermediate plate entirety peace is torn effective work efficiency that improved open simultaneously.
Accompanying drawing explanation
Fig. 1 is the hydraulic jack schematic diagram for tension steel strand in prior art;
Fig. 2 is the feed-through hydraulic jack structure schematic diagram in the utility model;
Fig. 3 is the plan sketch of instrument anchor ring in the utility model;
Fig. 4 is the lateral plan of instrument anchor ring in the utility model.
The specific embodiment
Feature of the present utility model and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that the understanding of technical personnel of the same trade:
As Fig. 1-4, in figure, mark 1-27 is respectively: tool clamping piece 1, instrument anchor ring 2, spacer shell 3, jack 4, positioning plate 5, tool clamping piece 6, instrument anchor ring 7, anchor plate 8, oil inlet 9, return opening 10, steel strand 11, anchor plate 12, work anchor ring 13, work clip sheet 14, positioning plate 15, stretch-draw hole 16, spacer shell 17, backing plate 18, return opening 19, instrument anchor ring 20, tool clamping piece 21, oil inlet 22, safety screen 23, outer cylinder sheath 24, piston body 25, punching cover 26, end cap 27.
Embodiment: the present embodiment relates to a kind of preposition feed-through hydraulic jack that in building, science of bridge building, steel strand is carried out prestressed stretch-draw that is applied to, and this hydraulic jack is the modifying device for conventional hydraulic jack shown in Fig. 1.As shown in Figure 1, this routine hydraulic jack is beam circle feed-through hydraulic jack, its main body is jack 4, there is oil inlet 9 and oil outlet 10, on the aft end face of jack 4, be provided with an instrument anchor ring 2 with some tool clamping pieces 1 through spacer shell 3, simultaneously on the front end face of jack 4, be provided with an instrument anchor ring 7 with some tool clamping pieces 6 through positioning plate 5, instrument anchor ring 7 is butted on the anchor plate 8 in beam body.The major technique defect of this equipment is: one, safety factor is low, and safety control is subject to human element more, has certain potential safety hazard; Two, to expose usable length long for steel strand, and cost drops into larger; Three, in stretch-draw and maintenance process, dismounting is comparatively loaded down with trivial details, and work efficiency is general.
Be illustrated in figure 2 the preposition feed-through hydraulic jack in the present embodiment, the main body of this preposition feed-through hydraulic jack is hydraulic jack, it comprises punching cover 26 from inside to outside successively, piston body 25 and outer cylinder sheath 24, piston body 25 is set in the outside wall surface of punching cover 26, outer cylinder sheath 24 is set in the outside wall surface of piston body 25, and the end face between outer cylinder sheath 24 and piston body 25 forms shutoff with end cap 27, offer respectively return opening 19 and oil inlet 22 in the outside wall surface front-end and back-end of outer cylinder sheath 24, the drainback passage of the oil cylinder that return opening 19 forms for outer cylinder sheath 24, the oil inlet passage of the oil cylinder that oil inlet 22 forms for outer cylinder sheath 24, the front end face of piston body 25 is butted on spacer shell 17 and forms not kinetoplast through backing plate 18, and outer cylinder sheath 24 and component movement body (being equivalent to the chuck of aforementioned not kinetoplast) of punching cover 26 can be done with respect to the not movement of kinetoplast under oil circuit drives.On the front end face of spacer shell 17, be provided with a positioning plate 15, on positioning plate 15, be fixed with work anchor ring 13, in the anchor hole of work anchor ring 13, be inserted with work clip sheet 14; The instrument anchor ring 20 that has been threaded on the interior forward end face of punching cover 26, is inserted with tool clamping piece 21 in the anchor hole of instrument anchor ring 20; In addition, on the aft end face of punching cover 26, be fixed with safety screen 23 through a bolt, safety screen 23 can carry out opening and closing control to the inner space of punching cover 26 by rotation.
As shown in Figure 3,4, on instrument anchor ring 20, be distributed with some anchor holes, the quantity of anchor hole is corresponding with the steel strand quantity of required stretch-draw, in anchor hole, be inserted with tool clamping piece 21, tool clamping piece 21 in the present embodiment is combined by three intermediate plates, and by establishing rubber ring at its outside hoop, it is integrally formed, can disposablely push in the anchor hole in instrument anchor ring 20.
As shown in Figure 2, adopt the preposition feed-through hydraulic jack pair Prestressed Concrete Bridges of two covers in the present embodiment to carry out stretch-draw operation, specifically comprise the steps:
(1) required control stress for prestressing and steel strand theoretic elongation during according to the stretch-draw of this project bridge, the hydraulic jack that meets tension stress and tentioning stroke is produced in design, through field-checking: hydraulic jack technical parameter reaches the required designing requirement of stretch-draw, coefficient of correction does not exceed 1.05 grades, meets code requirement;
(2) oil inlet on hydraulic jack 22 and return opening 19 are installed with hydrant cart oil circuit, joint should be firm, must not have external leakage phenomenon;
(3) hydraulic jack is mentioned, make its front end face just to the anchor plate 12 in the stretch-draw hole 16 in bridge beam body; Take afterwards strand pulling machine to enter 11 lashings of machine steel strand, guarantee that steel strand 11 blankings are accurate, steel strand 11 are successively through work anchor ring 13, positioning plate 15, spacer shell 17 and instrument anchor ring 20; After treating steel strand 11 lashings, the mode being threaded connection screws in instrument anchor ring 20 that in punching cover 26, both to be done as a whole; It should be noted that work anchor ring 13, positioning plate 15, spacer shell 17 and hydraulic jack should be on same straight line, and vertical with the end face of backing plate 18, otherwise easily damage parts;
(4) adopt rubber ring that work clip sheet 14, tool clamping piece 21 are become one respectively, disposable work anchor ring 13, the instrument anchor ring 20 of pushing, after intermediate plate strikes tight dropping place, carries out stretch-draw operation;
(5) start Oil pump electrical machinery, to oil-feed in oil inlet 22, outer cylinder sheath 24 outwards moves with respect to piston body 25 with the movable bodies of punching cover 26 compositions, moves with instrument anchor ring 20, and tool clamping piece 21 clamps steel strand 11 simultaneously;
(6) stop control lever in the time of hydraulic jack stroke residue 5mm～10mm, opens return opening 19 valves and makes high-pressure side Pressure Drop to zero;
(7) if following two times tensioning is proceeded in the designing requirement of single tension out of reach;
(8) oil return, tool clamping piece 21 outwards moves in company with steel strand 11, and outer cylinder sheath 24 and punching cover 26 are got back to initial position;
(9) tool clamping piece 21 pushed in instrument anchor ring 20 and strike tightly, repeating step 5-6, until reach designing requirement; It should be noted that, be provided with rotatable safety screen 23 in hydraulic jack rear end, in the time that hydraulic jack is in running order, safety screen 23 is closed, and when off working state, safety screen 23 is opened.
In the present embodiment, the beneficial effect of preposition feed-through hydraulic jack is:
(1) two traditional its technological processes of ring type feed-through hydraulic jack because of instrument anchor ring external, in the time there is tool clamping piece explosion, relic splashes region within the scope of 45 degree, and the speed per hour of splashing, up to 100-150km, causes very large potential safety hazard to operating personal and pedestrian; The present embodiment adopts three circle feedthrough structure tool anchor rings to be built in jack transition apparatus front end, and at rear end design safety baffle plate, when occurring tool clamping piece explosion, flying chip, fly beam control within the scope of cylinder body, reach safety precaution double insurance, thoroughly eliminated potential safety hazard;
(2) first take strand pulling machine to carry out steel stranded wire penetrating adapter, guarantee that steel wire is accurate, instrument anchor ring is screwed in punching cover front end by the mode being threaded connection, and installs in firm foundations at the instrument of assurance anchor ring, carries out lower step stretch-draw operation; After tested, the every end single steel strand of beam body usable length can shorten 350mm, and every hole 32mT beam is saved 805 yuan, and every Pin 32m case beam is saved 1180 yuan, and the saving analytical table of steel strand is as follows:
| Sequence number | Beam type | Steel strand radical | Save length | Unit price | The amount of money (unit) |
| 1 | T beam (hole) | 174 | 121.8m | 6000 yuan/ton | 805 |
| 2 | Case beam (Pin) | 255 | 178.5m | 6000 yuan/ton | 1180 |
Note: T beam is to lead to bridge (2005) 2101-32m curve as example, and case beam is to lead to the whole hole of bridge (2005) 2221-II 31.5m as example;
(3) instrument anchor ring is fixed on oil cylinder front end, when under stretch-draw bundle steel strand radical same case without changing instrument anchor ring, reduced the dismounting number of times of instrument anchor ring, three-chip type tool clamping piece entirety peace is torn effective work efficiency that improved open simultaneously; Take 32mT beam as example: in equal number situation, every beam of former whole stretch-draw needs 1.5 hours used times, after adopting new technology, every actual stretch-draw time of beam is 1 hour, stretch-draw every day work capacity, by former every day 3/ of single line hole, is brought up to single line hole (work efficiency has improved 30%) every day 4/.
Claims (6)
1. a preposition feed-through hydraulic jack, it is characterized in that described hydraulic jack comprises punching cover, is sheathed on described punching and overlaps peripheral piston body, be sheathed on the outer cylinder sheath of described piston body periphery and be positioned at the spacer shell on described piston body front end face, wherein said piston body and not kinetoplast of the affixed formation of described spacer shell are provided with the work anchor ring with intermediate plate on described spacer shell; Described punching cover and the movable body of the affixed formation of described outer cylinder sheath with respect to described piston body, at described punching cover, Inner Front End place is connected with the instrument anchor ring with intermediate plate.
2. the preposition feed-through hydraulic jack of one according to claim 1, is characterized in that, in described punching cover, having cavity at described instrument anchor ring rear.
3. the preposition feed-through hydraulic jack of one according to claim 1 and 2, the rearward end that it is characterized in that described punching cover is provided with safety screen that can opening and closing.
4. the preposition feed-through hydraulic jack of one according to claim 1, is characterized in that described punching cover, described piston body, described outer cylinder sheath, described work anchor ring and described instrument anchor ring have same central axis.
5. the preposition feed-through hydraulic jack of one according to claim 1, is characterized in that affixed for being threaded between described instrument anchor ring and described punching cover internal face.
6. the preposition feed-through hydraulic jack of one according to claim 1, is characterized in that described intermediate plate is the intermediate plate of clamping steel strand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044266.1U CN203682980U (en) | 2014-01-24 | 2014-01-24 | Front-locating penetrating type hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420044266.1U CN203682980U (en) | 2014-01-24 | 2014-01-24 | Front-locating penetrating type hydraulic jack |
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| Publication Number | Publication Date |
|---|---|
| CN203682980U true CN203682980U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420044266.1U Expired - Fee Related CN203682980U (en) | 2014-01-24 | 2014-01-24 | Front-locating penetrating type hydraulic jack |
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| CN (1) | CN203682980U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640126A (en) * | 2021-10-13 | 2021-11-12 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
-
2014
- 2014-01-24 CN CN201420044266.1U patent/CN203682980U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113640126A (en) * | 2021-10-13 | 2021-11-12 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
| CN113640126B (en) * | 2021-10-13 | 2022-01-11 | 中国矿业大学(北京) | Rock-soil prestressed anchor cable or anchor rod tensioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20220124 |