CN104692281A - Three-stage double-acting self-fitting hydraulic jack - Google Patents
Three-stage double-acting self-fitting hydraulic jack Download PDFInfo
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- CN104692281A CN104692281A CN201510141784.4A CN201510141784A CN104692281A CN 104692281 A CN104692281 A CN 104692281A CN 201510141784 A CN201510141784 A CN 201510141784A CN 104692281 A CN104692281 A CN 104692281A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/46—Combinations of several jacks with means for interrelating lifting or lowering movements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
Abstract
The invention provides a three-stage double-acting self-fitting hydraulic jack. The three-stage double-acting self-fitting hydraulic jack comprises an outer oil cylinder, a primary piston cylinder block, a secondary piston cylinder block and a tertiary piston cylinder block which are in sleeving connection coaxially sequentially, and further comprises a plurality of cylinder block inclining portions, and the cylinder block inclining portions are arranged between the outer wall of the primary piston cylinder block and the inner wall of the outer oil cylinder uniformly and between the upper wall of the primary piston cylinder block and the lower wall of the outer oil cylinder correspondingly. Each cylinder block inclining portion comprises a hollow tube sleeving a spring connectively, a solid tube is connected to the other end of the spring, and the external diameter of the solid tube is matched with the internal diameter of the hollow tube. The three-stage double-acting self-fitting hydraulic jack has the advantages that by the aid of the cylinder body inclining portions, the primary piston cylinder block achieves that the three-stage piston cylinder blocks translate along an optional direction and rotate within a specific three-dimensional space in an inclining manner under finite constraint of stainless steel segmentation blocks, so that cylinder jamming caused by the fact that the cylinder blocks deflect irregularly under the action of upper dynamic load is improved.
Description
Technical field
The present invention relates to hydraulic jack technical field, particularly relating to a kind of three grades of double actings from fitting hydraulic jack.
Background technology
In bridge jacking work progress, conventional hydraulic jacks is made up of oil cylinder, piston, seal ring, base and hydraulic pressure wet goods parts, programmable logic controller (PLC) (Programmable Logic Controller, PLC) system, equilibrium oil distributor and high pressure fuel pipe, hydraulic oil single-acting fuel transfer pump and precise displacement monitoring device (displacement pickup) is coordinated to realize integral bridge or Local Members synchronization of jacking up and fall operation after rise.And current most of elevated bridge top girder construction all adopts hollow slab girder, box girder, trough girder and T-shaped plate-girder, and the keystone configuration of girder is bent cap, between beam body and bent cap, rubber plinth is set, bridge floor load can be reached lower cover girder construction until pile foundation, top beam body Yin Wendu simultaneously, load and concrete self creep the infinitesimal deformation produced can by rubber plinth on behalf of elimination, but after rubber plinth produces distortion and damage, due to top beam body and lower cover girder construction gap too small, traditional single-acting or double-action hydraulic jack are due to cylinder body itself highly excessive (all higher than 4cm), cannot lay and be less than or equal in the small space of 4cm into gap.Single-acting or double acting thin type jack cooperation PLC control system and relevant device can only be laid and realize the micro-jacking of top beam body and bearing replacement operation, but there is following problem and drawback in traditional single-acting or the slim jack of double acting micro-jacking operation: under bridge floor not close to traffic situation, when the slim jack jacking of tradition operates, easily be subject to the huge load action in top and card cylinder phenomenon occurs, or due to cylinder body not constraint itself, cause delivery quality excessive, piston occurs and departs from cylinder body and oil leakage phenomenon and jacking failure.
Summary of the invention
Because the above-mentioned defect of prior art, it is conventional hydraulic jacks cylinder body not constraint itself that the present invention will solve, and causes delivery quality excessive, and the technical matters of piston disengaging cylinder body and oil leakage phenomenon and jacking failure occurs.
For achieving the above object, the invention provides a kind of three grades of double actings from fitting hydraulic jack, comprising: outside oil cylinder, first order piston/cylinder, second stage piston/cylinder and the third stage piston/cylinder composition coaxially connected together successively; Multiple cylinder body rake is also comprised in described jack, described cylinder body rake is evenly arranged between the outer wall of described first order piston/cylinder and the inwall of described outside oil cylinder, and between the corresponding upper wall being arranged at described first order piston/cylinder in position and the lower wall of described outside oil cylinder; Described cylinder body tilt component comprises hollow cylinder, the spring of socket in described hollow cylinder, the solid cylindrical shell that the described spring other end connects, and the external diameter of described solid cylindrical shell and the internal diameter of described hollow cylinder match; The top of described first order piston/cylinder is provided with cross salient, the corner of described cross salient is provided with manual centering rectification device, described manual centering rectification device comprises the spring be fixedly connected with described first order piston/cylinder, the hook be connected with described spring.。
Preferred as technique scheme, the number arranging described cylinder body tilt component is 5.
Preferred as technique scheme, described second stage piston/cylinder and third stage piston/cylinder are made up of four sub-cylinder bodies respectively.
Preferred as technique scheme, described first order piston/cylinder inside is provided with the asphalt channel being communicated to described second stage piston/cylinder, described asphalt channel is provided with bidirection press valve.
Preferred as technique scheme, described bidirection press valve opening and closing threshold value is 0.5MPa.
Preferred as technique scheme, described three grades of double actings comprise the first oil-leakage-prevention barrier from laminating hydraulic jack, described first oil-leakage-prevention barrier comprises the oil removal material that outside oil cylinder inner roof wall attaches, the free end of described oil removal material is provided with compressed part, described compressed part and described first order piston/cylinder compress, described compressed part comprises high-strength spring and corrosion-resistant steel ball, described first oil-leakage-prevention barrier also comprises high polymer elastic rubber plate, one end of described high polymer elastic rubber plate is fixedly connected with described corrosion-resistant steel ball, the other end is connected with pinch device, one end of described pinch device is connected with described first order piston/cylinder, the other end is connected with described oil removal material,
Described three grades of double actings also comprise the second oil-leakage-prevention barrier from laminating hydraulic jack, and described second oil-leakage-prevention barrier comprises bottom the segmentation bulk that arranges in outside oil cylinder and offers oil circulation hole, and inside described outside oil cylinder, base is set to radiused configuration.
The invention has the beneficial effects as follows:
The three grades of double actings provided of the present invention are from fitting hydraulic jack, and first order piston/cylinder utilizes cylinder body rake to realize three grades of piston/cylinders along any direction translation and certain three dimensional space tilt rotation when corrosion-resistant steel segmentation bulk piecemeal finite constraint.Cylinder body and this body space of jack are set, improve cylinder body and produce irregular deflection and card cylinder phenomenon by top Under Dynamic Load.
Be described further below with reference to the technique effect of accompanying drawing to design of the present invention, concrete structure and generation, to understand object of the present invention, characteristic sum effect fully.
Accompanying drawing explanation
Fig. 1 is the planar structure schematic diagram of oneself the laminating hydraulic jack of three grades of double actings that one embodiment of the invention provides;
Fig. 2 is three grades of double actings laminating hydraulic jack A-A section-drawing certainly in Fig. 1;
Fig. 3 is three grades of double actings laminating hydraulic jack B-B section-drawing certainly in Fig. 1;
Fig. 4 is the structural representation that the first order cylinder body of oneself the laminating hydraulic jack of three grades of double actings that the embodiment of the present invention provides stretches out;
Fig. 5 is the structural representation that three grades of double actings of oneself the laminating hydraulic jack of three grades of double actings that the embodiment of the present invention provides are stretched out from laminating hydraulic jack second and third grade of cylinder body;
Fig. 6 is three grades of double actings providing of the embodiment of the present invention control to distribute hydraulic power unit system automatically structural representation from laminating hydraulic jack and oil mass;
Fig. 7 is that three grades of double actings that the embodiment of the present invention provides stretch out using state schematic diagram from laminating hydraulic jack first order cylinder body;
Fig. 8 is that three grades of double actings that the embodiment of the present invention provides stretch out using state schematic diagram from laminating hydraulic jack second stage cylinder body;
Fig. 9 is that three grades of double actings that the embodiment of the present invention provides stretch out using state schematic diagram from laminating hydraulic jack third stage cylinder body;
Figure 10 is the three grades of double actings using state schematic diagram of laminating hydraulic jack three grades of cylinder bodies from jointing plate soffit certainly that the embodiment of the present invention provides;
Figure 11 is three grades of double actings laminating hydraulic jack cross-sectional structure schematic diagram certainly that the embodiment of the present invention provides;
Figure 12 is the structure enlarged diagram of the hermetically-sealed construction of oneself the laminating hydraulic jack of three grades of double actings that in Fig. 2, Fig. 3, C portion provides;
Figure 13 is three grades of double actings structure enlarged diagram that oil circuit punches in the oil mass automatic statistical device and cylinder body of laminating hydraulic jack that in Fig. 2, D portion provides;
Figure 14 is the structure enlarged diagram of the manual centering rectification device of oneself the laminating hydraulic jack of three grades of double actings that in Fig. 2, E portion provides;
Figure 15 is three grades of double actings laminating three grades of cylinder bodies of hydraulic jack and structure enlarged diagram of oil circuit certainly that in Fig. 3, F portion provides;
Figure 16 is the structural representation of the upper and lower device for limiting expansion of first order cylinder body of oneself the laminating hydraulic jack of three grades of double actings that in Fig. 3, G portion provides;
Figure 17 is the structural representation of the high polymer elastic rubber plate oil removal seal approach of oneself the laminating hydraulic jack of three grades of double actings that the embodiment of the present invention provides;
Figure 18 is the structural representation of the oil removal seal construction of oneself the laminating hydraulic jack of three grades of double actings that in Figure 11, H portion provides;
Figure 19 is the double acting synchronous jacking device part composition structural blast schematic diagram that further embodiment of this invention provides.
Detailed description of the invention
Shown in accompanying drawings 1 ~ Figure 19, present embodiments provide a kind of three grades of double actings and automatically control to distribute hydraulic power unit system 44 from laminating hydraulic jack 7 and oil mass.The three grades of double actings of every platform are made up of first order piston/cylinder 6, second stage piston/cylinder 5, third stage piston/cylinder 1, outside oil cylinder 43, digital flowmeter 8 (being equipped with digital flowmeter data line 22), oil cylinder oil inlet mouth 9 jointly from laminating hydraulic jack 7 external structure, as shown in Fig. 1 and Figure 15, second stage piston/cylinder 5 and third stage piston/cylinder 1 are arranged at the inside of first order piston/cylinder 6.Oil mass controls to distribute hydraulic power unit system 44 automatically to be needed between jacking bridge beam body 35 and lower support thing (or basis) 36 by three grades of double actings of identical for multiple stage type specification being arranged at respectively from laminating hydraulic jack 7.
Three grades of double actings, from laminating hydraulic jack 7, comprising: the outside oil cylinder 43, first order piston/cylinder 6, second stage piston/cylinder 5 and the third stage piston/cylinder 1 that coaxially connect together successively form; Second stage piston/cylinder 5 and third stage piston/cylinder 1 are made up of four sub-cylinder bodies respectively.Three grades of double actings fit hydraulic jack 7 certainly due to classification jacking, and three grades of piston/cylinders are respectively divided into four sub-cylinder bodies, as as shown in Fig. 7 ~ Figure 10, three grades of double actings can according to on-the-spot actual condition bottom the adjacent beams body of laminating hinge seam both sides from laminating hydraulic jack 7, make adjacent beams body can realize uniform stressed and synchronization of jacking up falling, the more traditional slim jack of the serviceability that this part is superior, have and significantly promoted and improve, be more applicable for the complex working condition of current all kinds of jack-up construction.
By carrying out Curve guide impeller to tradition slim jack jacking cylinder geometrical body structure, there is the problem cannot fitted at the bottom of adjacent plate-girder in the jacking plane overcoming the overall contact surface of traditional slim jack, successfully make each jacking cylinder unit of ultra-thin jack can be close to the adjacent panels soffit that there is the discrepancy in elevation, and in jacking process, realize adjacent panels back lift be uniformly distributed and formative dynamics balance top power, simultaneously innovative design adjustment handle, high-altitude application workman can be convenient to and carry out real-time deviation correcting and centering from the jacking contact surface of the arbitrarily angled putting position to ultra-thin jack and jacking cylinder unit, further ensure that ultra-thin jack top lift promotes with dynamic synchronization being uniformly distributed of adjacent panels soffit, and keep top force homeostasis, improve the reasonableness of jacking operation simultaneously, stop and avoid causing secondary " destruction " to cutting with scissors seam between adjacent plate-girder, for desirable operating condition is created in adjacent plate-girder synchronization of jacking up construction.
In order to realize can along any direction translation and three certain bit space tilt rotation in jack jacking process, multiple cylinder body rake is also comprised in jack, cylinder body rake is evenly arranged between the outer wall of first order piston/cylinder 6 and the inwall of outside oil cylinder 43, and between the corresponding upper wall being arranged at first order piston/cylinder 6 in position and the lower wall of outside oil cylinder 43; Cylinder body tilt component comprises hollow cylinder 18, the spring 20 of socket in hollow cylinder 18, the solid cylindrical shell 19 that the spring other end connects, and the external diameter of solid cylindrical shell 19 and the internal diameter of hollow cylinder 18 match.The number of cylinder body tilt component is preferably 5.Hollow cylinder 18, solid cylindrical shell 19 can select stainless steel.By reference to the accompanying drawings 2, shown in accompanying drawing 3 and accompanying drawing 15, first order piston/cylinder 6 can utilize cylinder body rake, and namely the hollow flexible cylindrical shell 18 of corrosion-resistant steel, stainless steel solid cylindrical shell 19, being configured in when corrosion-resistant steel splits bulk 21 piecemeal finite constraint of corrosion-resistant steel height strong spring 20 realize three grades of piston/cylinders 6,5,1 along any direction translation and certain three dimensional space tilt rotation.
As shown in Fig. 3 and Figure 11, segmentation bulk is positioned at outside oil cylinder 43 inner wall of hydraulic jack, and is close to the hollow flexible cylindrical shell 18 of corrosion-resistant steel and stainless steel solid cylindrical shell 19.The effect of segmentation bulk mainly contains 2 points: 1. splitting bulk can carry out Region Segmentation spacing (being divided into 5 pieces of moving areas) by hollow for the corrosion-resistant steel be connected with first order piston/cylinder 6 flexible cylindrical shell 18 and stainless steel solid cylindrical shell 19, guarantee first order piston/cylinder 6 the hollow flexible cylindrical shell 18 of 5 corrosion-resistant steels that is connected and stainless steel solid cylindrical shell 19 carry out flexible translation respectively along the direction of specifying and vertically move, 2. by digging semicircle hole bottom segmentation bulk, at oil pump in hydraulic jack during fuel feeding, the inner rising along with the oil mass in outside oil cylinder 43 and oil pressure of jack, three grades of piston/cylinders stretch out respectively to be close to bottom beam body and stressed, if there is the situations such as unbalance stress in 5 pieces of scalable translations of segmentation bulk segmentation and the region of vertical movement, by the semicircle hole bottom segmentation bulk, stressed (hydraulic pressure) can be flowed to stressed (hydraulic pressure) comparatively zonule compared with hydraulic oil guidance quality in large regions in real time, thus make stressed (hydraulic pressure) compared with three grades of cylinder bodies of large regions from fitting after at the bottom of beam body evenly to sink, and stressed (hydraulic pressure) evenly stretches out (or floating) compared with three grades of cylinder bodies of zonule from fitting after at the bottom of beam body simultaneously, the hydraulic pressure difference produced compared with the different hydraulic pressure oil mass in zonule and the discrepancy in elevation compared with large regions and stressed (hydraulic pressure) by stressed (hydraulic pressure) guarantees the stress balance of each stress area and the object of hydraulic pressure reasonable distribution.
By improving cylinder interior tectonic sieving, the deflection of cylinder body any direction in three dimensional space can be realized, realize any direction translation of cylinder body in self table plane and the vertical movement on vertical cylinder body surface in-plane simultaneously, and by arranging necessary cylinder body and this body space of jack, significantly improving cylinder body and producing irregular deflection and card cylinder phenomenon by top Under Dynamic Load.And by the improvement to jacking housing structure, add the constraint in cylinder body jacking process, and to the dual oil card of cylinder interior vibrational power flow, even if after a large amount of fuel feeding of oil pump enters ultra-thin jack inside, also can stop and avoid the leakage of oil that produces in traditional slim jack jacking process and cylinder body to take off cylinder phenomenon, make jacking process and result success reliably, and make Various types of data more closing to reality monitoring data, thus ensure that the fidelity of jacking travel displacement data and jack top force data and reliable confidence level.
In order to jacking step by step and the automatic order falling of oneself laminating hydraulic jack 7 of conservative control three grades of double actings, first order piston/cylinder 6 inside is provided with the asphalt channel being communicated to second stage piston/cylinder 5, asphalt channel is provided with bidirection press valve.First order piston/cylinder 6 inside is made up of, as shown in Fig. 2, Fig. 3 and Figure 15 first order cylinder interior asphalt channel 4, bidirection press valve 14 and cylinder body rake.Preferably, arranging of bidirection press valve 14 can consider to take 0.5MPa as the boundary opened and closed, if the hydraulic oil pressure of first order piston/cylinder 6 bottom is less than 0.5Mpa, then bidirection press valve 14 is in closed condition, hydraulic oil by continue to promote first order piston/cylinder 6 upwards jacking until reaching three grades of double actings till the top of laminating hydraulic jack 7 inside face, if now three grades of double actings continue to strengthen from laminating hydraulic jack 7 oil inside offering amount, oil pressure increase until more than 0.5Mpa time, bidirection press valve 14 is opened, then hydraulic oil will enter second stage piston/cylinder 5 and even third stage piston/cylinder 1 along first order cylinder interior asphalt channel 4, and promote three grades of piston/cylinders 6, 5, 1 classification jacking, and when three grades of piston/cylinders 6, 5, when 1 classification falls after rise, because external pressure and interior oil are pressed with a difference of pressure, when oil pressure pressure is less than 0.5Mpa, contribute to utilizing barometric pressure by three grades of piston/cylinders 6, 5, 1 presses down and automatically receives cylinder.
Conveniently centering rectification operation, the top of first order piston/cylinder 6 is provided with cross salient 3, the corner of cross salient is provided with manual centering rectification device 2, and manual centering rectification device 2 comprises the spring 12 be fixedly connected with first order piston/cylinder 6, the hook be connected with spring 12.Spring 12 can select stainless steel, by the drawknot of the hook and stainless steel spring 12 that are welded on manual centering rectification device 2 and first order piston/cylinder 6 two ends and rivet 10 and welding material 11 (or shutoff ointment), the rotating shaft of manual centering rectification device 2 is fixed on first order piston/cylinder 6, as shown in figure 14, realize manual centering rectification device 2 rotate drop-down use and on push away retraction function, and can utilize the gap of the cross monolateral aligning adjacent beams body of cross salient 3 or hinge seam position carry out centering rectification operation.
In order to prevent the leakage of hydraulic oil, three grades of double actings are provided with multiple oil removal barrier from laminating hydraulic jack 7, comprise the first oil-leakage-prevention barrier, first oil-leakage-prevention barrier comprises the oil removal material 17 that outside oil cylinder 43 inner roof wall attaches, the free end of oil removal material 17 is provided with compressed part, compress with first order piston/cylinder 6, compressed part comprises high-strength spring 15 and corrosion-resistant steel ball 16, first oil-leakage-prevention barrier also comprises high polymer elastic rubber plate 13, one end of high polymer elastic rubber plate 13 is fixedly connected with corrosion-resistant steel ball 16, the other end is connected with pinch device, one end of this pinch device is connected with described first order piston/cylinder 6, the other end is connected with oil removal material 17.Connection between high polymer elastic rubber plate 13 and corrosion-resistant steel ball 16 see Figure 12, after adopting rivet 29 to rivet, can be added stifled sealant 27 and achieves a fixed connection, can certainly adopt the connection modes such as welding by angle steel sheet 28.Same, after high polymer elastic rubber plate 13 is connected with pinch device and also can adopts and adopt rivet 29 to rivet by angle steel sheet 28, add stifled sealant 27 and achieve a fixed connection.Pinch device comprises the band hollow flexible cylindrical shell 24 of high strong spring corrosion-resistant steel and stainless steel solid cylindrical shell 25.Said structure can realize, as the pinch device of a part for first order piston/cylinder 6, be with the hollow flexible cylindrical shell 24 of high strong spring corrosion-resistant steel and stainless steel solid cylindrical shell 25 will be close in outpacking rubber in laminating hydraulic jack 7 jacking and falling process three grades of double actings and fill out alumina silicate fibre (or glass wool) oil removal material 17, common formation prevents three grades of double actings from from laminating hydraulic jack 7, the first " barrier " cutting oil and oil removal of leakage of oil occurring when hydraulic oil delivery volume is excessive or oil pressure is too high.
In addition, owing to have employed compressed part, comprise high-strength spring 15, corrosion-resistant steel ball 16, stainless steel solid cylindrical shell 30, structure type of attachment between the hollow flexible cylindrical shell 31 of corrosion-resistant steel, specifically see Figure 16, this compressed part structure is at three grades of piston/cylinders 6, 5, 1 jacking and falling are received in cylinder process due to three grades of piston/cylinders 6, 5, closely connected first order piston/cylinder surface is kept when the translation on 1 generation any direction and three dimensional space tilt rotation, operate in the process of pumpback hydraulic oil at the falling plunger of PLC hydraulic power unit 39 and the dump pump part reversion of the pumpback oil such as Special Eccentric wheel and motor thereof, contribute to producing certain downforce and make three grades of piston/cylinders 6, 5, 1 smooth falling receives cylinder automatically, decrease three grades of piston/cylinders 6 simultaneously, 5, the friction force produced when the translation on 1 generation any direction and the motion of three dimensional space tilt rotation.
In order to prevent the leakage of hydraulic oil, the second oil-leakage-prevention barrier is also provided with between first order piston/cylinder 6 and outside oil cylinder 43, second oil-leakage-prevention barrier comprises: offer oil circulation hole 23 bottom the segmentation bulk 21 arranged in outside oil cylinder, as shown in figure 13, and base arranges base radiused configuration 26 in outside oil cylinder 43 inside outside oil cylinder 43, be conducive to three grades of piston/cylinders 6, 5, 1 is being subject to realizing outside oil cylinder 43 inside and three grades of piston/cylinders 6 under uneven upper load effect, 5, the oil mass layout code reassignment of the hydraulic oil of 1 bottom and oil pressure self-equalizing, the oil feeding line simultaneously realizing hydraulic oil in hydraulic oil fuel feeding jacking process along three grades of double actings bottom the inside face inclined-plane of the outside oil cylinder 43 of laminating hydraulic jack 7 to lower and on promote three grades of piston/cylinders 6, 5, 1 normal operation, the oil circuit avoided and stop traditional fuel feeding is toward three grades of double actings oil leakage phenomenon that row causes from the inside face of the outside oil cylinder 43 of laminating hydraulic jack 7 is upwards reverse.Simultaneously, the mechanical connection that three grades of double actings mainly rely on the high polymer elastic rubber plate 13, high-intensity sealing glue 27, angle steel sheet 28, the rivet 29 that are arranged on first order piston/cylinder 6 and the outside inner both sides of oil cylinder 43 to form from the first order piston/cylinder 6 of laminating hydraulic jacks 7 and the connection of outside oil cylinder 43 inside realizes, and for space-closed connects, as Fig. 2, Fig. 3, Figure 12 and Figure 17, can be formed and prevent the second capsule containment oil " barrier " that hydraulic oil pressure in jacking process is excessive or oil mass too much and leak outside.
In order to adapt to the operating mode that bridge beam body is the needs jackings such as T-shaped beam, freely-supported hollow slab girder, box beam and trough girder and bearing replacement, three grades of double actings preferably design from laminating hydraulic jack 7 body height and are less than 4cm.Owing to adopting three grades of piston/cylinders 6,5,1 classification jacking, as shown in Figure 4, Figure 5, large about the 2cm of jacking stroke of the current existing slim jack of its jacking stroke ratio.
In to the decision design of hydraulic pressure ultra-thin jack body height, need the factor considered to depend primarily on bottom beam body and the gap at bent cap top, or even the altitude information of the rubber plinth of the beam body bottom support adopted is as foundation.According to actual field construction operating mode, gap between hollow slab girder bottom surface and its lower cover top surface of the beam (or hollow slab girder beam body bottom adopt rubber plinth height) is between 31mm ~ 42mm, and in conjunction with practical experience, if hydraulic jack body height is excessively thin, then easily there are cylinder body area of thrust surface not enough, Lack of support can be caused, thus cause the cylinder body of hydraulic jack to destroy, and hydraulic jack body height is blocked up, then cannot be laid in the gap of plate-girder bottom surface and bent cap end face.In sum, ultrathin hydraulic jack body height is for being less than 4cm, and namely 3.8cm is high.According to on-the-spot practice of construction operating mode and load situation (hollow slab girder deadweight+vehicular load), the load born required for the ultrathin hydraulic jack laid under cutting with scissors crack structure position between hollow slab girder is oppositely calculated, and determine specified top lift and the jacking area of contact (comprising the parameters such as jack body diameter) of the hydraulic jack of required research and development, combine engineering experience and test figures in the past simultaneously, in workshop, simulate field working conditions test cell is set, by constantly adjusting the body (or external cylinders) of hydraulic jack highly, by collecting test figures after carefully analyzing, seek to meet on-the-spot actual condition demand, the hydraulic jack body height meeting theoretical checking computations and l-G simulation test is less than the test results of the optimum of 4cm, thus determine the geometric techniques index such as hydraulic jack diameter and body height size.
Than traditional slim jack volume and the less three grades of double actings of height of cylinder from fitting hydraulic jack (being highly less than 4cm), can be laid in the working space of narrow space, meet various complexity little space jacking operation operating mode, can stop and avoid using cutting bent cap protective cover concrete and installing bracket jacking to operate the bridge structure secondary caused simultaneously " destruction " phenomenon, and the jacking stroke realizing more traditional slim jack on this ultra-thin jack significantly promotes (more than 2cm), its operation ease and work efficiency advantage is highlighted than traditional slim jack jacking operation and bearing replacement.
The present embodiment is by carrying out essence improvement to the internal structure of existing conventional slim jack and operate outside principle, thus realize being applicable to jacking narrow space, jacking accuracy requirement is high, synchronism requires that high and synchronization of jacking up and the integration of receipts cylinder require high complex working condition, and optimize and solve traditional slim jack complicated operation and synchronization of jacking up and falling failure frequency problem occurred frequently in bridge jacking process under bridge floor not close to traffic situation, realize ultra-thin jack high-altitude application simple, meet the synchronization of jacking up of each adjacent beams body and unjointed beam body and fall the construction demand of operation after rise bottom accurate location and jack jacking cylinder automatic attaching bridge beam body, aforementioned many technical barriers and problem are captured.
The social benefit that the present embodiment produces mainly can in the synchronization of jacking up of actual science of bridge building and the synchronous construction operation fallen after rise, by the superior serviceability of workman's easy positioning and rectifying cooperation three grades of double actings from laminating hydraulic jack self, stress performance and physical property, realize fast, concentrate, civilise construction, for the smooth operation of the on-the-spot line operating personal of project provides advantage and guarantee, while raising operating personal work efficiency, directly reduce related synchronization jacking and fall time of consuming of operation after rise, short for creating, flat, fast construction period and race against time (such as, some overhaul or salvaging duration anxiety, operating efficiency and schedule requirement high) provide certain condition, and indirectly alleviate and avoid the traditional construction cycle and longer social economy to be increased and the negative effect of people's daily life, be conducive to improving People's livelihood.
Three grades of double actings that the present embodiment provides not only thoroughly improve from laminating hydraulic jack and have stopped traditional jacking and fallen leakage of oil in construction after rise, steel-fastening, the common sex chromosome mosaicism such as de-cylinder, and significantly promote synchronization of jacking up simultaneously and fall the success ratio and work efficiency that operate after rise, thus the time of embodiment is short, work efficiency is high, do over again few, the measured construction advantage of matter, direct reduction and the project that optimizes is on-the-spot artificial and the input amount of mechanical one-shift and time loss, and the project that significantly decreases each side (people in this operation work progress, machine, material, method, ring) cost drop into, for construction enterprises' reduced cost, create profit and gain time and provide good objective condition and opportunity.
By three grades of double actings providing the present embodiment from the research and development of laminating hydraulic jack and application, be conducive to making industry Nei Ge enterprise understand bridge synchronous jacking and the latest tendency and the progress that fall preparation of construction and the facility of constructing after rise instantly, deeper secondary research and development and optimization can be carried out by the core technology grasping invention for research and development unit, thus grasp the core technology of this aspect, and create the objective condition that industrial competition provides necessary for R & D Enterprises self.Transformation of scientific findings is being actual product and the on-the-spot line construction of the project that is applied to must through process by what become that core technology is converted into productive force, for outstanding creativeness and the works fine performance of patent of the present invention, and enterprise can be used to capture industry market, win project and establish public's praise and image provides advantage for research and development.
As shown in Figure 6, the present embodiment additionally provides a kind of oil mass and automatically controls to distribute hydraulic power unit system 44, comprise coordinated control system 40, coordinated control system 40 is connected with multiple hydraulic power unit of PLC one to one 39 and the adjustable oil path distributor 34 of PLC by integrated data line 38; High pressure fuel pipe 33 mouth of PLC hydraulic power unit 39 is connected to the oil circuit input end of the adjustable oil path distributor 34 of PLC, and the FPDP of PLC hydraulic power unit 39 is connected with the FPDP of the adjustable oil path distributor of PLC by integrated data line 38; PLC is adjustable digital flowmeter data line 22 that oil path distributor 34 carries respectively by the digital flowmeter that single data line 32 is connected with at least one hydraulic jack, and the oil inlet of hydraulic jack is connected to by high pressure fuel pipe 33.Preferably, the hydraulic jack in the present embodiment is the three grades of double actings laminating hydraulic jack 7 certainly in above-described embodiment.
Single data line 32 carries out docking with three grades of double actings digital flowmeter data line 22 that digital flowmeter 8 carries in hydraulic jack 7 of fitting and is connected, the other end is connected on the FPDP of the adjustable oil path distributor 34 of PLC, the dynamic oil mass information of the input jack inside of each three grades of double actings being measured Zi digital flowmeter 8 in laminating hydraulic jack 7 and data feedback are to the adjustable oil path distributor 34 of PLC, automatically the opening and closing of the sluice gate of each fuel feeding circuit in the adjustable oil path distributor 34 of PLC are regulated by PLC information analysis and processing capacity, thus the oil mass of each three grades of double actings on laminating hydraulic jack 7 oil circuit of improving supply, complete preliminary delivery quality Optimization Work, simultaneously by the Analysis on Results of the adjustable oil path distributor of PLC 34 to the preliminary delivery quality Optimization Work that the oil mass of each three grades of double actings on laminating hydraulic jack 7 oil circuit is carried out, dynamic analysis data and the conclusion information very first time are fed back on PLC hydraulic power unit 39 and coordinated control system 40 by integrated data line 38, by PLC hydraulic power unit 39 with coordinated control system 40 respectively to the dynamic delivery quality of each three grades of double actings on hydraulic jack 7 of fitting fed back, each oil circuit oil mass distribution condition, on the analysis foundation of the multidate informations such as oil circuit opening and closing situation, by the motor rotations of PLC function record Hydraulic Pump that PLC hydraulic power unit 39 carries, automatically the hydraulic pressure oil mass exporting respective volume amount is calculated according to revolution, and adjust hydraulic pump motor revolution and power according to hydraulic oil amount result of calculation in real time in conjunction with the analysis result of prior feedback information and supply oil mass and the delivery rate of the adjustable oil path distributor 34 of each PLC, and by coordinated control system 40 coordinated signals and the collaborative work coordinating multiple PLC hydraulic power unit 39, the adjustable oil path distributor of PLC 34 can carry out PLC secondary analysis according to PLC hydraulic power unit 39 and coordinated control system 40 to taking the new delivery quality of (or adjustment) after the dynamic oil mass information analysis process of feedback simultaneously, the distribution condition of leading to each three grades of double actings oil circuit valve opening and closing and concrete oil mass on laminating hydraulic jack 7 in the adjustable oil path distributor 34 of PLC is determined according to analysis result, thus ensure that each three grades of double actings enter oneself laminating hydraulic jack 7 inside of each three grades of double actings from fitting supply oil mass between hydraulic jack 7 and existing oil mass sum are consistent forever, reach from oil mass automatically control to distribute hydraulic power unit entire system to each three grades of double actings from the local oil circuit delivery quality of laminating hydraulic jack 7 and three grades of double actings from the inner total oil mass of laminating hydraulic jack 7 from entirety to the dynamic oil mass message loop process of local and systematization delivery quality balance, once each three grades of double actings are after the inner total oil mass of laminating hydraulic jack 7 keeps balancing each other, each three grades of double actings also will be consistent from the jacking displacement of three grades of piston/cylinders of laminating hydraulic jack 7, thus accurately guarantee that in jacking process, each three grades of double actings are from the synchronism of fit hydraulic jack 7 jacking stroke and beam displacement body.
Coordinated control system 40 is made up of jointly hand-held signal projector (remote controller) and built-in signal receiver (chip), hand-held signal projector (remote controller) is provided with three buttons, precompressed key respectively, jacking key and falling key, precompressed can be sent by long distance wireless, the control signal of jacking and falling operation, and on the control setup CPUS7-224 mainboard that the control system that built-in signal receiver (chip) is installed on PLC hydraulic oil pump is correlated with (being equivalent to computer main board), and in PLC Pump Control System, form new wireless remote control controlling functions.In PLC Pump Control System, the oil pump of original setting and establishment defeated (time) oily work functions can show and operate on outside touch-screen, and four defeated (time) hydraulic fluid ports that PLC hydraulic oil pump comprises set switching function all in the controls.If want switch and the work of defeated (time) oil of defeated (time) hydraulic fluid ports different on coordinated signals multiple PLC hydraulic power unit simultaneously, can be in advance ON or OFF (can directly point touching shield set) to each PLC hydraulic power unit not needing defeated (time) hydraulic fluid port controlled and needs control set its mode of operation on outside touch-screen, then according to practice of construction stage and needs, directly by clicking the upper different button (precompressed of hand-held signal projector (remote controller), jacking or falling), synchronously send command signal and via built-in signal receiver (chip) and the process of control setup CPUS7-224 double analysis to mounted built-in signal receiver (chip) on the relevant control setup CPUS7-224 mainboard of the control system of each PLC hydraulic oil pump, then finally assign work order by control setup CPUS7-224 to allow previously set and be in the instruction that defeated (time) hydraulic fluid port under ON (unlatching) state synchronously sends according to hand-held signal projector (remote controller) and take relevant work or operation (oil transportation precompressed, oil transportation jacking or oil pumping fall after rise), and previously set defeated (time) hydraulic fluid port be under OFF (closedown) state and will not participate in work, thus control further the jacking of each ultra-thin jack corresponding to defeated (time) hydraulic fluid port, precompressed and falling construction.
Automatically control to distribute in hydraulic power unit system 44 operation process in whole oil mass and be responsible for supplying electric power to the adjustable oil path distributor 34 of PLC hydraulic power unit 39, coordinated control system 40 and PLC by portable electric generator (or power supply) 41, transmission line of electricity 42 always, the normal operation of guarantee equipment and the electricity needs of data transmission, and digital flowmeter 8 carries battery supply, also give the electricity needs of electric power running and digital flowmeter data line 22 data transmission solving himself.Simultaneously each three grades of double actings are from the oil mass supply between any two of laminating hydraulic jack 7, PLC is adjustable oil path distributor 34 and PLC hydraulic power unit 39 and oil mass reclaims and fuel feeding circuit realizes mainly through high pressure fuel pipe 33.
By that analogy, for each three grades of double actings from the oil return of laminating hydraulic jack 7 by cylinder recirculating oil quantity balance with synchronous fall after rise with beam body between keep falling after rise the consistent principle of displacement and above-mentioned three grades of double actings certainly fit hydraulic jack 7 synchronization of jacking up and beam displacement body synchronism principle consistent, repeat no more.
PLC hydraulic power unit possesses the double acting serviceability of hydraulic oil supply and pumpback, primarily of PLC system and machine operation system two parts composition, PLC system does not show in the drawings, as shown in figure 19, machine operation system forms jointly primarily of manual shutoff valve 45, Low Fuel Pump 46, leakage-free solenoid valve 47, jacking plunger 48, falling plunger 49, eccentric wheel 50, counter wheel 51, motor 52, back pressure valve 53, fuel tank 54.
As an embodiment, as shown in Figure 6, three grades of above-mentioned double actings are one group from laminating every 5 of hydraulic jack 7, and every two groups automatically control to distribute hydraulic power unit system 44 with an oil mass and are connected and carry out fuel feeding and oil return controls.
The bridge jacking from fit uniform stressed bridge synchronous jacking and the system of falling after rise of patent of the present invention and drop method is adopted specifically to comprise the following steps:
A. treating multiple stage three grades of double actings to be installed from laminating hydraulic jack 7 between the bridge beam body 35 of jacking and support (or basis) 36, and utilize three grades of double actings subsidiary manual centering rectification device 2 on laminating hydraulic jack 7 to carry out position centering and correction process (mainly allowing the gap of the monolateral aligning of the cross line adjacent two panels beam body of first order cylinder body salient 3 or hinge stitch position), as shown in Figure 6, guarantee that three grades of double actings are in from laminating hydraulic jack 7 midway location treating jacking two panels beam body.
B. high pressure fuel pipe 33 is connected with the interface of three grades of double actings from the oil cylinder oil inlet mouth 9 of hydraulic jack 7 of fit, PLC is adjustable oil path distributor 34 and PLC hydraulic power unit 39 respectively, guarantees from PLC hydraulic power unit 39 through the adjustable oil path distributor of PLC 34 to each three grades of double actings from the fuel feeding of hydraulic jack 7 of fitting and oil return circuit it is to be communicated with and unobstructed.
Be connected with the digital flowmeter data line 22 of three grades of double actings from hydraulic jack 7 of fitting one end of single data line 32, the other end of single data line 32 is connected with the FPDP of the adjustable oil path distributor 34 of PLC simultaneously; And the FPDP of the FPDP of adjustable oil path distributor 34, PLC hydraulic power unit 39 FPDP and coordinated control system 40 is connected to each other between two with PLC respectively by the two ends of integrated data line 38, guarantee that arriving PLC hydraulic power unit 39 from laminating hydraulic jack 7 through the adjustable oil path distributor of PLC 34 from each three grades of double actings all keeps being communicated with all data transmission links of coordinated control system 40 and unobstructed.
Then, transmission line of electricity 42 two ends are effectively connected with portable electric generator (or power supply) 41 and the adjustable oil path distributor 34 of PLC, PLC hydraulic power unit 39 and coordinated control system 40 respectively, guarantee the traffic clearance of each power operation equipment and be communicated with, the electric power that portable electric generator (or power supply) 41 is produced can convey to the adjustable oil path distributor of PLC 34, PLC hydraulic power unit 39 and coordinated control system 40 smoothly and carry out charged operation.As shown in Figure 6, interlock synchro control (synchronization of jacking up and falling) is carried out by arranging coordinated control system 40 between multiple stage PLC PLC hydraulic power unit 39.
C. start portable electric generator (or power supply) 41 and pass through transmission line of electricity 42 by power transmission to the adjustable oil path distributor 34 of PLC, PLC hydraulic power unit 39 and coordinated control system 40, make oil mass automatically control to distribute hydraulic power unit system 44 and carry out normal operation, oil mass automatically controls to distribute hydraulic power unit system 44 and is guaranteeing the oil mass accurate measurement of the hydraulic oil that PLC hydraulic power unit 39 exports, the hydraulic pressure oil mass that PLC adjusts the oil path distributor 34 pairs of PLC hydraulic power units 39 to export carry out oil mass accurately distribute and to each three grades of double actings under the inner total oil mass of laminating hydraulic jack 7 carries out the prerequisite that equivalent accurately controls, drive three grades of double actings from three grades of piston/cylinders 6 of laminating hydraulic jack 7,5, the inner carrier of 1 is with outer piston classification jacking, first order piston/cylinder 6 primary responsibility carries out the first order and synchronously tries jacking, in order to eliminate three grades of double actings from the space of fit hydraulic jack 7 and adjacent beams body bottom surface and the elastic deformation of beam body own, the uneven load transmitted along with bridge top in not close to traffic situation with seasonal first order piston/cylinder 6 and horizontal force are in conjunction with there is degree of dip between adjacent beams body 35 and the discrepancy in elevation carries out suitable translation and space tilt adjustments, make the surface of first order piston/cylinder parallel as far as possible and be close to the bottom surface of adjacent beams body, and guarantee monolateral gap or the hinge seam position still aiming at adjacent two panels beam body of the cross line of the first order cylinder body salient 3 that previous centering is complete, if there is little deviation still carry out secondary position centering and correction process (as Fig. 4 and Fig. 7) by three grades of double actings subsidiary manual centering rectification device 2 on laminating hydraulic jack 7.
By carrying out Curve guide impeller to the slim jack of tradition, by double level PLC control system in conjunction with professional flow monitoring device, guarantee to get from oil pump the conformability entering the oil mass of each ultra-thin jack after oil path distributor distributes, in the ultra-thin jack cylinder of direct guarantee, the volume of hydraulic oil increases uniform synchronization, and jacking travel displacement is synchronously equal, and adopt displacement monitor to carry out Simultaneous Monitoring and checking, if double level PLC control system distributes overbalance automatically to the fuel feeding of ultra-thin jack and oil mass, manual input parameter still can be adopted to distribute in conjunction with displacement monitoring feedback data adjustment fuel feeding and oil mass and to reach dynamical equilibrium, ensure that the displacement in ultra-thin jack jacking process accurately controls by two methods.
D. first order piston/cylinder 6 two centerings and positional deviation correction complete, and first order piston/cylinder 6 surface is parallel and after being close to the bottom surface of adjacent beams body, continue to drive oil mass automatically to control to distribute the oil mass accurate measurement of the hydraulic oil of hydraulic power unit system 44 keeping PLC hydraulic power unit 39 to export, the hydraulic pressure oil mass that PLC adjusts the oil path distributor 34 pairs of PLC hydraulic power units 39 to export carry out oil mass accurately distribute and to each three grades of double actings under the inner total oil mass of laminating hydraulic jack 7 carries out the prerequisite that equivalent accurately controls, continue to each three grades of double actings from laminating hydraulic jack 7 oil inside offering, second stage piston/cylinder 5 and third stage piston/cylinder 1 is made to continue to eject separately respectively, and carry out the second stage and third stage synchronization of jacking up operation respectively, and allow second stage piston/cylinder 5 or third stage piston/cylinder 1 surface can be parallel and closely connected in adjacent beams body bottom surface, when guaranteeing three grades of double actings from laminating hydraulic jack 7 position centering, according to three grades of double actings from laminating hydraulic jack 7 internal oil pressure self-equalizing, oil mass self-equalizing distributes and water conservancy diversion serviceability, meet and provide the top power that the uneven load handed down with adjacent beams body end face balances each other, make evenly to bear top lift between each beam body (or adjacent beams body), continue on this basis automatically to be controlled to distribute hydraulic power unit system 44 to each three grades of double actings from laminating hydraulic jack 7 evenly equivalent fuel feeding by oil mass simultaneously, the flow volume exported according to the running revolution automatic gauge hydraulic oil of the motor of PLC hydraulic power unit 39 and quality are also reflected on PLC read-out in real time, the three grades of double actings that enter of simultaneously feeding back from the digital flowmeter 8 that laminating hydraulic jack 7 carries in conjunction with three grades of double actings are comprehensively analyzed from the hydraulic pressure oil mass dynamic data of laminating hydraulic jack 7 inside, show that each three grades of double actings are equal from the inner oil inlet quantity per second of laminating hydraulic jack 7, " third-class " conclusion that inner oil mass total amount is equal and oil-feed speed is equal, thus confirm the three grade piston/cylinders 6 of each three grades of double actings from laminating hydraulic jack 7, 5, between the jacking stroke of 1 and each beam body, the jacking displacement of (or between adjacent beams body) is all synchronously equal, as Fig. 8, shown in Fig. 9 and Figure 10, gap between girder construction and beam body (or hinge crack structure) itself is zero damage and is protected effectively.
E. three grades of piston/cylinders 6 are utilized three grades of double actings from laminating hydraulic jack 7, 5, 1 puts in place after construction operation to the jacking of (or between adjacent beams body) between each beam body, can automatically control to distribute hydraulic power unit system 44 by oil mass and guarantee the oil mass accurate measurement of the hydraulic oil that PLC hydraulic power unit 39 exports, the hydraulic pressure oil mass that PLC adjusts the oil path distributor 34 pairs of PLC hydraulic power units 39 to export carry out oil mass accurately distribute and to each three grades of double actings under the inner total oil mass of laminating hydraulic jack 7 carries out the prerequisite that equivalent accurately controls, analogize according to the operation of synchronization of jacking up and principle, to all three grades of piston/cylinders 6, 5, 1 successively classification carry out the reverse first order, the second stage and the third stage are synchronously received cylinder and fall after rise, thus realize top power uniform balance and the beam that synchronously falls, and three grades of double actings can be utilized from three grades of piston/cylinders 6 of laminating hydraulic jack 7, 5, certainly the laminating serviceability of 1 recovers each beam body (or adjacent beams body) original position and state when the beam that falls receives cylinder, as Fig. 8, shown in Fig. 9 and Figure 10, gap between girder construction and beam body (or hinge crack structure) itself is zero damage and is protected effectively.
In sum, because embodiment have employed three grades of double actings from laminating hydraulic jack 7, the pre-jacking of one-level can be carried out, eliminate space and elastically-deformable while, adjustable jack piston cylinder surface is consistent with beam body base plane position, make in succeeding level-two and three grades of formal jacking processes, second stage piston/cylinder 5 and third stage piston/cylinder 1 can fully be fitted beam body bottom surface, and be the centering position (stitch with the hinge between adjacent two plate-girders and align) adjusting jack entirety by manual centering rectification device 2 people, make second stage piston/cylinder 5 and third stage piston/cylinder 1 better can play its oil pressure self-equalizing in jack up girder process, oil mass self-equalizing assignment performance, and realize the effect of beam body bottom surface uniform stressed.Simultaneously, automatically control to distribute the accurate measurement of hydraulic power unit system 44 pairs of hydraulic pressure oil masses by oil mass, hydraulic pressure oil mass accurately distribute and three grades of double actings from the accurate control of the inner total oil masses of laminating hydraulic jack 7, realize multiple three grades of double actings from the laminating inner identical oil mass of hydraulic jack 7 and jack three grades of piston/cylinders 6, 5, the conformability of 1 jacking stroke and beam displacement body, thus reach bridge beam body Multi-point synchronization jacking and fall after rise controlled, and avoid and stopped piston in prior art easily departing from cylinder body, piston is stuck by cylinder body, piston leakage of oil, jacking stroke differs and cannot accurately control, the uneven grade of top lift 18 defects, thus guarantee the structural safety in bridge jacking work progress, construction quality is good, work efficiency promotes and cost reduces.
By to the slim jack of tradition, PLC control system, single-acting fuel transfer pump contacts to each other and working mechanism carries out improvement optimal design, improved by slim for tradition single-acting jack is that three grades of double actings are from fitting hydraulic jack, and the Coupled motion system of upgrading research and development PLC general control system (PLC hydraulic power unit 39) and sub-control system (PLC is adjustable oil path distributor 34) on PLC control system basis, I carries out transformation and upgrade to tradition defeated (time) oil pump physical structure, at traditional single plunger (i.e. jacking plunger), on the supporting oil pump parts basis such as eccentric wheel and motor, add the dump pump part falling plunger and the pumpback oil such as Special Eccentric wheel and motor thereof after rise, realize the double acting integrated design of defeated (time) oil pump and application (as Figure 19), finally reach ultra-thin jack and jacking can fall the double acting performance receiving cylinder after rise, stop and captured tradition fuel transfer pump (single-acting oil pump) to realize the disadvantage that jack receives cylinder automatically.By PLC general control system and defeated (time) oil pump script two independent individual unit are carried out intensive merging, both number of devices and heavy burden had been decreased, the convenience of lifting operation and maintenance again, make both linkage work efficiency and quality better, improve traditional oil path distributor simultaneously, PLC sub-control system and oil path distributor are carried out intensive synthesis, according to the data of ultra-thin jack flow meter feedback, make oil path distributor can carry out linking exporting in synchro control many groups jack oil circuit with defeated (time) oil pump and carry out secondary inching defeated (time) oil mass often on group (individual) jack oil circuit with the oil mass of recovery and by the switch of the automation oil circuit gate of oil path distributor, thus reach and realize synchronous equal amount defeated (time) fuel-flow control of each ultra-thin jack in jack synchronization of jacking up and synchronous falling process, and then control and ensure the synchronism of jack jacking and falling displacement, stop and captured traditional slim jack jack-up system to control poor even heavy handled " bottleneck " to hydraulic jack synchronization of jacking up and falling.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical personnels in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. three grades of double actings are from fitting a hydraulic jack, it is characterized in that, comprising: outside oil cylinder, first order piston/cylinder, second stage piston/cylinder and the third stage piston/cylinder composition coaxially connected together successively; Multiple cylinder body rake is also comprised in described jack, described cylinder body rake is evenly arranged between the outer wall of described first order piston/cylinder and the inwall of described outside oil cylinder, and between the corresponding upper wall being arranged at described first order piston/cylinder in position and the lower wall of described outside oil cylinder; Described cylinder body tilt component comprises hollow cylinder, the spring of socket in described hollow cylinder, the solid cylindrical shell that the described spring other end connects, and the external diameter of described solid cylindrical shell and the internal diameter of described hollow cylinder match; The top of described first order piston/cylinder is provided with cross salient, the corner of described cross salient is provided with manual centering rectification device, described manual centering rectification device comprises the spring be fixedly connected with described first order piston/cylinder, the hook be connected with described spring.
2. a kind of three grades of double actings as claimed in claim 1 are from fitting hydraulic jack, it is characterized in that, described three grades of double actings comprise the first oil-leakage-prevention barrier from laminating hydraulic jack, described first oil-leakage-prevention barrier comprises the oil removal material that outside oil cylinder inner roof wall attaches, the free end of described oil removal material is provided with compressed part, described compressed part and described first order piston/cylinder compress, described compressed part comprises high-strength spring and corrosion-resistant steel ball, described first oil-leakage-prevention barrier also comprises high polymer elastic rubber plate, one end of described high polymer elastic rubber plate is fixedly connected with described corrosion-resistant steel ball, the other end is connected with pinch device, one end of described pinch device is connected with described first order piston/cylinder, the other end is connected with described oil removal material, described three grades of double actings also comprise the second oil-leakage-prevention barrier from laminating hydraulic jack, and described second oil-leakage-prevention barrier comprises bottom the segmentation bulk that arranges in outside oil cylinder and offers oil circulation hole, and inside described outside oil cylinder, base is set to radiused configuration.
3. a kind of three grades of double actings as claimed in claim 1 are from fitting hydraulic jack, and it is characterized in that, the number arranging described cylinder body tilt component is 5.
4. a kind of three grades of double actings as claimed in claim 1 are from fitting hydraulic jack, and it is characterized in that, described second stage piston/cylinder and third stage piston/cylinder are made up of four sub-cylinder bodies respectively.
5. a kind of three grades of double actings as claimed in claim 1 are from fitting hydraulic jack, it is characterized in that, described first order piston/cylinder inside is provided with the asphalt channel being communicated to described second stage piston/cylinder, described asphalt channel is provided with bidirection press valve.
6. a kind of three grades of double actings as claimed in claim 5 are from fitting hydraulic jack, and it is characterized in that, described bidirection press valve opening and closing threshold value is 0.5MPa.
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