EP2325390B1 - Poutre lisseuse et finisseuse de route - Google Patents

Poutre lisseuse et finisseuse de route Download PDF

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Publication number
EP2325390B1
EP2325390B1 EP09013219A EP09013219A EP2325390B1 EP 2325390 B1 EP2325390 B1 EP 2325390B1 EP 09013219 A EP09013219 A EP 09013219A EP 09013219 A EP09013219 A EP 09013219A EP 2325390 B1 EP2325390 B1 EP 2325390B1
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EP
European Patent Office
Prior art keywords
screed
proportional
hydraulic
valve
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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EP09013219A
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German (de)
English (en)
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EP2325390A1 (fr
EP2325390B2 (fr
Inventor
Roman Dipl.-Ing. Munz
Martin Dipl.-Ing. Buschmann
Achim Eul
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Joseph Voegele AG
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Joseph Voegele AG
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Application filed by Joseph Voegele AG filed Critical Joseph Voegele AG
Priority to EP09013219.2A priority Critical patent/EP2325390B2/fr
Priority to PL09013219T priority patent/PL2325390T5/pl
Priority to JP2010228263A priority patent/JP5751793B2/ja
Priority to US12/907,341 priority patent/US8353642B2/en
Priority to CN201010512860.5A priority patent/CN102041770B/zh
Publication of EP2325390A1 publication Critical patent/EP2325390A1/fr
Publication of EP2325390B1 publication Critical patent/EP2325390B1/fr
Publication of EP2325390B2 publication Critical patent/EP2325390B2/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/14—Extendable screeds
    • E01C2301/16—Laterally slidable screeds
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/20—Screed or paver accessories for paving joint or edge treatment

Definitions

  • the invention relates to a screed according to the preamble of claim 1 and a road finisher according to the preamble of claim 15.
  • the directional control valve either opens at least one flow path completely or closes it. This results in a predetermined velocity of the hydraulic flow rate of the hydraulic cylinder in the respective direction of movement.
  • the volume flow can be changed by additional hydraulic measures upstream or downstream of the directional control valve.
  • no continuous change or adjustment of the movement speed of the hydraulic cylinder is possible.
  • a known road paver has a screed with the features of the preamble of claim 1.
  • the known paver has for each hydraulic cylinder of the Ausziehbohle in the screed on a magnetic switching valve, which is switched by a controller to extend the retractable screed, retract or hold in position.
  • the magnetic switching valve is a directional control valve for the hydraulic cylinder, the movement speed of which depends exclusively on the delivery pressure provided by the hydraulic system of the road paver or the set delivery flow rate (quantity per unit of time). An individual adaptation of the speed of movement of the hydraulic cylinder is not possible with a magnetic switching valve (passage position / shut-off position).
  • the invention has for its object to provide a screed and a paver in which it is possible to adjust the movement speed of the hydraulic cylinder for moving the Ausziehbohle when installing a covering to certain and possibly varying installation parameters.
  • proportional directional control valve with either proportional electrical direct control or proportional electric hydraulic pilot control makes it possible to change or even automatically adjust the movement speed of the hydraulic cylinder and thus the displacement speed of the Ausziehbohle relative to the base board exactly or adapted to at least one installation parameter in proportional valve technology the movement speed of the controlled hydraulic cylinder always exactly corresponds to the current loading of the proportional magnet or has a precisely predeterminable proportionality to the current application.
  • proportional solenoids generate a specific course of the magnetic force or of the magnet lifting and, in contrast to black-and-white actuating magnets, not only switch back and forth between switching positions.
  • the proportional valve technology thus makes it possible to move the respective Ausziehbohle very slowly in the screed for accurate training of a running in working direction seam or a lateral completion of the respective Ausziehbohle or change the movement speed accordingly with a specific profile, and yet to basically set the working width the screed to move the extenders as fast or as slowly as possible. If a side port of a road is to be installed on the pavement or to bypass an obstacle at a certain paving speed, the proportional valve technology for the respective skip can be used to precisely vary the speed of movement as required.
  • the paver has with the equipment the respective proportional directional control valve electro-hydraulic requirements for to be connected as a working, Ausziehbohlen having screed, which make it possible to precisely control the displacement speed of each Ausziehbohle, modify and / or adapt to certain installation parameters. This results in high quality built-in coverings even in difficult installation conditions.
  • proportional valve technology has been used in mobile hydraulics, for example in crane controls, mast controls of concrete pumps, lifting platforms, industrial trucks and the like for decades, it has a higher cost, complicated electrical control, and a suspected susceptibility to breakdown under extreme working conditions found in a screed or a paver no use for screeds of road pavers, also because the operating personnel specially trained by road pavers to cope with certain installation parameters, and to compensate for the limitations imposed by the black and white valve technique with improvisations and experience.
  • the proportional valve technology especially for the hydraulic cylinders of the extendable screeds in the screed is useful not only for the non-limiting selection of the listed installation situations, but for all applications in which a precise adjustment and change in the speed of movement of the towed by the paver, but an independent Working unit forming screed is needed to keep the quality of the installed lining as varied and high as possible despite varying or only occasionally occurring installation situations.
  • the proportional valve technology is compatible with a constant pump or a control pump pressure supply, wherein in a constant pump system in non-actuation of a hydraulic consumer, a non-pressurized circulation (via a circulation valve or through the proportional directional control valve) may be provided.
  • the proportional valve technology in the screed also offers the advantage of being able to control automatic operating sequences conveniently via control systems. Since in the screed with considerable working pressures, e.g. 200 bar or more must be worked, and with large flow rates of, for example 60 l / min, relatively large-sized, powerful proportional solenoids are required for a proportional electrical direct actuation of the directional control valve, so that it may be appropriate proportional directional control valves with proportional electric use hydraulic pilot control, since for proportional feedforward possibly lower pressures and only small quantities of pressure medium are to be mastered, for which Malawi emergede and weaker and therefore cheaper proportional solenoids are sufficient.
  • the movement speed of the hydraulic cylinder is adjusted in proportion to a given speed of movement of at least one other Ausziehbohlen component via the control of the proportional solenoid, for the function of the Ausziehbohlen shift is important.
  • the speed of movement of the hydraulic cylinder is set in proportion to the speed of movement of a vertical and / or transverse drive of the Ausziehbohlen-Glättbleches that generates a substantially constant speed of movement. This requires, for example, for adaptation, the speed of movement of the hydraulic cylinder, for example, depending on the bank angle of the Ausziehbohlen-Glättbleches to vary sensitively to compensate for an offset while moving.
  • the speed of movement of the hydraulic cylinder is load-independent variable and durable.
  • the proportional valve technology can be particularly easily combined with hydraulic measures that lead to a load independence. This is advantageous because the resistance to movement of the Ausziehbohle example, the Ausschiebehub, wear, the nature of the substrate, the consistency of the paving material, environmental conditions and the like. Depends and may vary. Thanks to the load independence in the control of the movement speed of the hydraulic cylinder, these influences can not falsify the predetermined by the current application of the proportional solenoid movement speed.
  • the proportional valve technology for the hydraulic cylinder of Ausziehbohlen is expediently used in a screed at the operable with a given movement speed hydraulic cylinder and / or spindle drives with hydro or electric motors for height and / or roll adjustment of Ausziehbohlen-Glättbleches at least relative to the base screed plate are provided.
  • the given speed of such drives has thanks to the proportional valve technology for the hydraulic cylinder of the Ausziehbohlen shift no adverse effect in adapting to certain installation parameters or changing installation situations more.
  • the height and / or roll adjustment of the Ausziehbohlen-Glättbleches can be made different here.
  • the entire guide system for the pullout bed is adjusted relative to the base board.
  • the guide on which the Ausziehbohle is moved fixed parallel to the screed plate of the base board in this.
  • the extractor screed plate is adjusted only relative to the pull-out, either in the vertical position or in the bank or only in the altitude, in which case the bank angle is changed by an additional adjustment.
  • the proportional directional control valve can be designed as a seat valve or slide valve.
  • a seat valve is characterized by a leak-free shut-off position and precisely predeterminable actuating forces.
  • a spool valve allows very precise control, but works with inevitable leakage.
  • the proportional directional control valve could also be a two-way or three-way flow control valve, which works with a proportional or directly controlled by the proportional solenoid control orifice.
  • a screed associated control block of the electro-hydraulic control at least for the respective Ausziehbohlen-displacement hydraulic cylinder between two working ports and a pressure source with associated tank a 4/3-way proportional pressure control valve, preferably in slide construction and with the tank open zero position, with two oppositely acting proportional solenoids for direct operation provided.
  • the control block contains a minimum number of hydraulic or electro-hydraulic components for each hydraulic cylinder.
  • each 3/2-valve is associated with a pressure pilot control of the 4/3-valve.
  • the 4/3 valve prefferably be assigned a pressure compensator on the pressure side and a load-holding valve for the work connection side, wherein the two load-holding valves can be opened in a cross-over manner.
  • the pressure compensator makes it possible to operate the proportional directional control valve independently of the load, because the pressure compensator keeps the pressure difference set at the proportional directional control valve by the application of current to the proportional magnet constant, independently of fluctuations in the supply pressure or the working pressure in the hydraulic cylinder, and thus keeps the speed of movement of the hydraulic cylinder constant.
  • the load-holding valves generate a hydraulic blockage of the hydraulic cylinder in the respectively set shift position and immediately release their load-holding function as a function of pressure, when a movement of the hydraulic cylinder is controlled.
  • the pressure compensator is expediently acted on the control side by a control spring and a, preferably via a shuttle valve, tapped load pressure signal and closing control side by the inlet pressure of the 4/3-valve.
  • the pressure balance determine changing pressure conditions in the hydraulic cylinder or on the pressure source and intervene accordingly regulating. This is also expedient if several hydraulic consumers are supplied and controlled by a common pressure source.
  • At least one working port of the hydraulic cylinder should be protected by a pressure relief valve to the tank, which performs, for example, a shock valve function, if the pullout accidentally moves against an obstacle or to stop.
  • control block in addition to the proportional directional control valves of the hydraulic cylinder for Ausziehbohlen-displacement and other hydraulic consumers in the screed as the hydraulic cylinders and / or hydraulic motors for Ausziehbohlen-Smoothing plate height and / or -Verne Trentsver ein assigned, solenoid-operated directional control valves, and is the control block connected to a common pressure source and also to a common electro-hydraulic control.
  • the pressure source, the tank and the electrohydraulic control, as well as the control block can be located in the paver. At least the control block could alternatively be accommodated in the screed.
  • the proportional solenoids are assigned electrical proportional amplifiers in the electrohydraulic control, the advantages of which are to keep the application current for the proportional magnet constant regardless of the supply voltage and of thermally induced changes in resistance of the coil of the proportional magnet. Furthermore, this results in a better EMC characteristic and the possibility of use within a wide temperature range.
  • the electrohydraulic control system comprises an automatic control section, preferably optionally activatable, for linking the actuation of the proportional solenoids with the motion control of a further extending screed component movement.
  • the automatic control section adjusts, for example, the application of current to the respective proportional magnet in exact association with a movement control of the further extending screed component in order to carry out an individual adaptation to a given installation situation.
  • the energization of the proportional solenoid and the control of the further movement can be linked on the operator side.
  • the control of movements in the screed may be performed by the paver and / or for example an exterior steering position on the screed be, for example, even by wireless route, eg by radio transmission or the like., By an operator off the paver and the screed or possibly even from the Internet using, for example, the Bluetooth or WLAN technology.
  • At least the electrical or electronic components, such as the proportional magnets, and possibly provided feedback sensors can be integrated in a bus system, eg a CAN bus, of the paver.
  • Fig. 1 schematically illustrates a paver F with a screed B when installing a covering 24 of paving material 15 on a substrate 14, wherein the paver F at a paving speed V moves.
  • the paver F has a chassis 1 with a chassis 2 and a front bunker 3 for paving material. Behind the bunker 3 is a prime mover source, e.g. a diesel engine 4, arranged in the chassis 1, which drives via a pump distributor gear 5, at least one hydraulic pump 6, which supplies a hydraulic system 9, in which at least one control block is arranged with at least one proportional directional control valve, not shown.
  • the screed B is connected to Switzerlandholmen 10, which are connected to draw points 11 of the chassis 1.
  • the tow points 11 can be adjusted by hydraulic motors 12 in height.
  • the road paver F has a driver's cab 7 with a control panel 8, in which at least part of an electro-hydraulic control S for the screed B can be placed.
  • a transverse distribution device 13 is provided for the built-in material 15, which is conveyed backwards from the bunker 3 and dropped on the ground 14.
  • the screed B forms from the paving material 15, the covering 24 with a certain thickness, which can vary in the direction of travel or transverse to the direction of travel.
  • the built-in material 15 is compacted and leveled in the built-in lining 24 (by precompacting and / or high-compression devices of the screed B, not shown).
  • the screed B has a base board 16 of a certain width, on which, for example, an outside control stand 17 can be attached. Also, the exterior control station 17 may include a similar or similar electrohydraulic control S '.
  • the electrohydraulic controls S, S ' are connected to the hydraulic system 9 and serve to provide movable working components of the screed B, e.g. to operate hydraulically.
  • vigbohlenfeste guide means 18 On the base board 16 , jackbohlenfeste guide means 18 are provided, on which Ausziehbohlen 19 relative to the base board 16 and transversely to the direction of working back and forth are arranged herverschiebbar.
  • To move each Ausziehbohle 19 at least one hydraulic cylinder 20 is provided, which is supported in the base 16 on the one hand and in the Ausziehbohle 19 on the other.
  • the hydraulic cylinders 20 serve to change the working width of the screed B or of the built-in covering 24.
  • the base screed 16 has at least one screed plate 21 which rests on the paving material 15.
  • Each Ausziehbohle 19 has at least one screed plate 22.
  • the screed B is appropriate employed with a positive angle ⁇ relative to the ground 14, while being dragged floating on the paving material 15.
  • the attack angle ⁇ determines, for example, the lining thickness of the covering 24.
  • the devices 23 may have as drives hydraulic cylinders or hydraulic motors, which are supplied by the hydraulic system 9, or electric motors. Usually, the actuated devices 23 generate a substantially constant speed of movement of the Ausziehbohlen-Glättbleches 22nd
  • the coating 24 in Fig. 2A has over the working width an at least substantially flat top 25.
  • the lining 24 has a roof profile 26 (this is the base board 16 according to the Fig. 3 to 5 subdivided into two basic screed parts 16a, 16b which can be bent off relative to one another).
  • the lining 24 has a flat upper part 25 (or a roof profile 26, not shown), eg as a roadway, and a lateral, downwardly sloping shoulder 26 '(slope) extending from a transition 27 at an angle ⁇ to the outer edge of the lining 24 drops.
  • the Fig. 2A, 2B, 2C indicates X and X1 different working widths. The working width is changed by actuating at least one of the hydraulic cylinders 20 for displacing at least one of the Ausziehbohlen 19th
  • Fig. 3 shows the screed B (a part of it) in a schematic view in the direction of travel.
  • the base pile 16 consists of two equal wide base screed parts 16a, 16b, which (not shown in detail), for example, relative to each other are bent to selectively the roof profile 26 of Fig. 2B or the flat top 25 of Fig. 2A or Fig. 2C to shape.
  • the screed-fixed guide means 18 are parallel to the screed smoothing plate 21 and guide the Ausziehbohle 19 during displacement movements controlled by the hydraulic cylinder 20 with respect to the base pile fixed displacement direction.
  • Pro Ausziehbohle 19 for example, two height and / or Querverstellinraumen 23 (with hydraulic cylinders, spindle drives with hydraulic motors or electric motors, or the like) provided to the altitude of the Ausziehbohlen-Glättbleches 22 relative to Baseboard screed 21 to be able to adjust, which, for example, when changing in Fig. 1 shown attack angle ⁇ is required because the mounted on the rear side of the base beam 16 Ausziehbohle 19 has a greater distance from the towing point 11 than the base board 16 and moves differently than this.
  • the screed in Fig. 3 builds, for example, with the base board 16 and the partially pushed-Ausziehbohle 19 the covering 24 of Fig. 2A one.
  • Fig. 4 illustrates that the109nver eins- and / or Qu mecanicsverstell Anlagenen 23 for the Ausziehbohlen-smoothing plate 22 can also be used to adjust the bank of the Ausziehbohlen-Glättbleches 22 with the angle ⁇ of the shoulder 26 ', if the covering 24 of Fig. 2C is installed.
  • the height offset Y1 of the Ausziehbohlen-Glättbleches 22 must be compensated with respect to the Grundbohlen-Glättblech 21 by adjusting the angle ⁇ when increasing the working width, for example from X to X1 by the Ausziehbohlen-Glättblech 22 parallel to itself is lowered.
  • the movement speed of the hydraulic cylinder 20 must be adjusted as a function of the angle ⁇ for a given speed of movement of the height adjustment of the Ausziehbohlen-Glättbleches 22. For this reason, and also for avoiding obstacles or forming precise seams or terminations, therefore, the proportional valve technology for the screed B is used to control the movement speed and / or direction of the hydraulic cylinder 20, as shown in FIG 8 and 9 explained.
  • Fig. 5 serve the means 23 only for height adjustment of the Ausziehbohlen-Glättbleches 22 and an intermediate frame 28 'relative to the screed smoothing plate 21 (by means of, for example, a common drive 23').
  • a bank of the Ausziehbohlen-Glättbleches 22 with the angle ⁇ can be selected by a further, separate drive 28 relative to the intermediate frame 28 '. If the working width is increased from X to X1, the devices 23 or the drive 23 'are displaced with a substantially constant speed of movement of the Ausziehbohlen-Glättbleches 22 and intermediate frame 28', so that for locating the transition 27, the movement speed of the hydraulic cylinder 20 depends must be adjusted by the size of the selected angle ⁇ . Again, the proportional valve technology is used for speed control.
  • the electro-hydraulic control S, S 'for the screed B of Fig. 3 and 4 is based Fig. 6 schematically indicated in connection with at least one control block 29 per screed half, to which a common pressure source P and an associated tank on the one hand and the respective hydraulic cylinder 20 and the drives of the devices 23 are connected.
  • Fig. 7 illustrates the linkage of the electro-hydraulic control S, S 'with a control block 29, per screed half, in which the respective hydraulic cylinder 20 and the drive 23' of the screed B of Fig. 5 are connected.
  • the control blocks 29 of the 6 and 7 is used for at least the speed control of the hydraulic cylinder 20, the proportional valve technology, as based on the 8 and 9 is explained.
  • control block 29 may be placed in the paver F, for example in the hydraulic system 9 and connected via couplings 61 and hydraulic lines with the screed B and at least the hydraulic cylinder 20.
  • the control block 29 could be located at a suitable location in the screed B or even directly on the respective hydraulic cylinder 20.
  • the control block 29 may be assembled in a plate-row or block construction of individual sections, as for example with reference to 8 and 9 is explained, or modularly constructed of individually mounted hydraulic components.
  • the Ausziehbohlen 19 are mounted on the rear in working direction rear side of the base pile 16 (rear mount).
  • the proportional valve technology can also be used on screeds for the hydraulic cylinders where the screeds are mounted on the front of the screed (front mount).
  • the control and / or electrical or electronic monitoring of the proportional directional control valve W or of proportional solenoids can be achieved via a bus system common in the road paver today, e.g. a CAN bus, which, if necessary, in conjunction with corresponding sensors and their information ensures high functionality and reliability.
  • a bus system common in the road paver today e.g. a CAN bus, which, if necessary, in conjunction with corresponding sensors and their information ensures high functionality and reliability.
  • control block 29 comprises at least three assembled sections 30, 31 and 32, the sections 30 and 31 containing proportional directional valves W for at least the two hydraulic cylinders 20 of the screed B, and in the further, not in detail running section 32, for example, black and white Solenoid directional valves W 'for driving Other hydraulic consumers such as the devices 23, 23 'and 28, and the like.
  • the Fig. 3 to 7 can be provided.
  • the section 30 has two working connections 33, 34 for the hydraulic cylinder 20, which is arranged between the extension screed 19 and the base screed part 6a. From the working ports 33, 34 lead working lines 35, 36 to the proportional directional control valve W, wherein the working line 35 is secured via an adjustable pressure relief valve 37 to a connected to a tank T tank line 47, and in both working lines, in this embodiment, hydraulically alsêtbare Load holding valves 38 arranged with immediate check valves 39 and between the working lines 35, 36 in a cross-connection 40, a shuttle valve 41 are arranged, which serves for tapping a load pressure signal.
  • the tank line 47 running through the sections 30, 31, 32 is connected to the proportional directional control valve W in the respective section like a pump line 48 common to all sections (pressure source P).
  • a pump line 48 common to all sections (pressure source P).
  • the section 30 of the associated pump line 48 may be arranged as a feed regulator, a pressure compensator 43, the adjustable pressure compensator member by a control spring 44 in the up direction (to open the passage) and parallel to the control spring 44 from a control line 45 with the load pressure signal from the shuttle valve 41st is acted upon, however, in the closing control direction (to shut off) from a control line 46 with the input pressure of the proportional directional control valve W is applied.
  • the proportional directional valve W is in Fig. 8 a multi-way multi-position spool valve with proportional electrical direct operations by oppositely acting proportional magnets M1, M2, which act directly on a valve element 50 (eg a spool), parallel to springs 42, for example, set the neutral position shown.
  • a valve element 50 eg a spool
  • 4/3-way proportional pressure control valve 49 the pressure control function is indicated by the parallel lines in the symbolic representation
  • the proportional magnets M1, M2 are for example, to the electro-hydraulic control S, S 'connected (in the paver and / or in the exterior control station 17), wherein the electro-hydraulic control S, S' have an automatic control section 60 or may be connected to this, to link the electrical control of the proportional solenoid M1, M2 with a control of a further Ausziehbohlen component movement, for example, the means 23, 23 'in the section 32 of the control block 29, for example, the hydraulic cylinder 20 to adjust with a depending on, for example, the other movement speed selected movement speed.
  • the electrohydraulic control S, S ' basically allows the direction and speed control of each hydraulic cylinder 20, the latter with change of the speed in direct dependence on the current application of the respective proportional magnet M1, M2.
  • the proportional directional control valve W controls the hydraulic cylinder 20 independent of load, since the pressure compensator 43 independently of the current through the respective proportional solenoid M1, M2 pressure difference across a valve spool 50 keeps constant whether the supply pressure (pressure source P) and / or the working pressure in the respective working line 35, 36 varies, so that always exactly the energization of the proportional magnet M1 or M2 corresponding amount of hydraulic medium per unit time flows, which determines the movement speed of the hydraulic cylinder 20.
  • the proportional directional valve W (4/3-way valve 49) is in Fig. 8 shown as a one-piece slide valve. The same function could be achieved in two proportional directional control valves. Proportional directional valve W could also be formed as a poppet valve or as one or two two-way or three-way proportional flow control valves (not shown).
  • control block 29 contains for the same functions another embodiment of the proportional directional control valve W.
  • the 4/3-way pressure control valve 51 for its spool 50 hydraulic pilot controls 52a, 52b, via control lines 53a, 53b to each a 3 / 2-way proportional pilot pressure control valve 54a and 54b are connected, at which the proportional solenoid M1, M2 act on a pilot valve member 55, such as a spool.
  • pilot valves 54a, 54b have to process only relatively small amounts of control fluid, are small and inexpensive, and need only smaller and less expensive proportional magnets M1, M2 in the execution of Fig. 8 ,
  • the proportional valve technology can alternatively be used for a screed of a road paver for precise speed adjustment and change, in which the 4/3-way proportional pressure control valve 49 basic screed telescopically and relative to each extendable screed in at least two relative to each other by means of sliding hydraulic cylinders Basic screed has adjustable sections.

Claims (15)

  1. Poutre lisseuse (B) pour finisseuse de route (F), avec une poutre de base (16) qui comporte au moins une tôle d'égalisation (21), et au moins une poutre extensible (19) qui comporte au moins une tôle d'égalisation (22) et qui est disposée sur la poutre de base (16) de manière à être coulissante par rapport à celle-ci à l'aide d'au moins un vérin hydraulique à commande bilatérale (20) pour modifier la largeur de travail (X, X1) de la poutre de base (B), et avec une commande électrohydraulique (S, S', 9) qui comporte au moins un distributeur à actionnement magnétique au moins pour commander la direction du vérin hydraulique (20) et qui est destinée à commander le vérin hydraulique (20), caractérisée en ce que pour la modification par opérateur ou automatique de la vitesse de mouvement du vérin hydraulique (20) en fonction d'au moins un paramètre de lissage, le distributeur est constitué par un distributeur proportionnel (W) avec un actionnement direct électrique proportionnel ou une commande pilote électrique hydraulique proportionnelle.
  2. Poutre lisseuse selon la revendication 1, caractérisée en ce qu'à l'aide d'un aimant proportionnel (M1, M2) de l'actionnement direct ou de la commande pilote du distributeur proportionnel (W), la vitesse de mouvement du vérin hydraulique (20) est réglable proportionnellement à une vitesse et/ou un sens de mouvement de préférence donnés d'au moins un autre composant de poutre extensible, de préférence proportionnellement à la vitesse de mouvement et/ou à un angle (β) d'un entraînement de hauteur et/ou d'inclinaison transversale (23, 23') pour la tôle de lissage de poutre extensible (22).
  3. Poutre lisseuse selon la revendication 1, caractérisée en ce que la vitesse de mouvement du vérin hydraulique (20) est apte à être modifiée et maintenue indépendamment de la charge par l'intermédiaire du distributeur proportionnel (W).
  4. Poutre lisseuse selon l'une au moins des revendications précédentes, caractérisée en ce qu'il est prévu dans la poutre extensible (19), pour le réglage de hauteur et/ou d'inclinaison transversale de la tôle de lissage de poutre extensible (22) par rapport à la tôle de lissage de poutre de base (21), des vérins hydrauliques et/ou des commandes à broche aptes à fonctionner à une vitesse de mouvement de préférence donnée, avec des moteurs hydrauliques ou électriques comme entraînements (23, 23').
  5. Poutre lisseuse selon l'une au moins des revendications précédentes, caractérisée en ce que le distributeur proportionnel (W) comprend au moins une vanne à plusieurs voies et à plusieurs positions à structure de soupape à siège ou de tiroir.
  6. Poutre lisseuse selon l'une au moins des revendications 1 à 3, caractérisée en ce que le distributeur proportionnel (W) comprend au moins un régulateur de débit à deux ou trois voies, avec un obturateur de régulation réglable grâce à l'aimant proportionnel (M1, M2).
  7. Poutre lisseuse selon l'une au moins des revendications précédentes, caractérisée en ce qu'il est prévu avec la commande électrohydraulique (S, S') dans un bloc de commande (29) relié, au moins pour le vérin hydraulique de coulissement de poutre extensible (20) correspondant, un régulateur de pression proportionnel à 4/3 voies (49), de préférence à structure à tiroir, avec une position nulle ouverte vers le réservoir (T), avec deux aimants proportionnels à actions contraires (M1, M2) entre deux raccordements de travail (33, 34) du vérin hydraulique (20) et une source de pression (P) avec un réservoir (T) associé.
  8. Poutre lisseuse selon l'une au moins des revendications 1 à 6 précédentes, caractérisée en ce qu'il est prévu dans un bloc de commande (29) relié à la commande électrohydraulique (S, S') deux régulateurs de pression pilotes proportionnels à 3/2 voies (54a, 54b) avec chacun un aimant proportionnel (M1, M2), de préférence à structure à tiroir, et un régulateur de pression à 4/3 (51) à pilotes hydrauliques, de préférence à structure à tiroir et avec une position neutre ouverte vers le réservoir (T) entre deux raccordements de travail (33, 34) du vérin hydraulique (20) et une source de pression (P) avec un réservoir (T) associé, chaque régulateur de pression 3/2 (54a, 54b) étant raccordé à une commande pilote de pression (52a, 52b).
  9. Poutre lisseuse selon la revendication 7 ou 8, caractérisée en ce qu'il est prévu, associés au régulateur 4/3 (51, 49), une balance de pression (43), côté source de pression, et des vannes de maintien de charge (38) à commande d'ouverture croisée, côté raccordement de travail.
  10. Poutre lisseuse selon la revendication 9, caractérisée en ce que la balance de pression (43) est apte à être commandée, côté commande d'ouverture, par un ressort de régulation (44) et par un signal de pression de charge prélevé de préférence par l'intermédiaire d'un sélecteur de circuit (41), et, côté commande de fermeture, par la pression d'entrée de la vanne 4/3 (51, 49).
  11. Poutre lisseuse selon la revendication 7 ou 8, caractérisée en ce qu'au moins un raccordement de travail (34) du vérin hydraulique (20) est protégé par une soupape de limitation de pression (37) par rapport au réservoir (T).
  12. Poutre lisseuse selon la revendication 7 ou 8, caractérisée en ce que le bloc de commande (29) comprend aussi, en plus des distributeurs proportionnels (W) des vérins hydrauliques (20) pour le coulissement de la poutre extensible, d'autres consommateurs hydrauliques dans la poutre lisseuse (B), comme des distributeurs à actionnement magnétique (W') associés aux vérins hydrauliques et/ou aux moteurs hydrauliques comme entraînements (23, 23') pour le réglage de hauteur et/ou d'inclinaison transversale de la tôle de lissage de poutre extensible (22), et est raccordé à une source de pression (P) commune à tous les consommateurs hydrauliques, avec un réservoir (T) associé, de préférence un système hydraulique (9) de la finisseuse (F), et à une commande électrohydraulique (S, S') commune.
  13. Poutre lisseuse selon l'une au moins des revendications 2 ou 6 à 12 précédentes, caractérisée en ce que des amplificateurs proportionnels électriques sont associés aux aimants proportionnels (M1, M2) du distributeur proportionnel (W).
  14. Poutre lisseuse selon l'une au moins des revendications 2 ou 6 à 13 précédentes, caractérisée en ce que la commande électrohydraulique (S, S') comporte une section de commande automatique (60) activable sélectivement, pour relier la commande des aimants proportionnels (M1, M2) à une commande d'un autre mouvement de composant de poutre extensible.
  15. Finisseuse (F) avec une poutre lisseuse (B) selon l'une au moins des revendications 1 à 14 comportant des poutres extensibles (19) aptes à coulisser grâce à des vérins hydrauliques (20), caractérisée en ce que la commande électrohydraulique (S, S') est en relation d'actionnement avec des aimants proportionnels (M1, M2) d'au moins un distributeur proportionnel (W) de la poutre lisseuse (B) associé fonctionnellement à un vérin hydraulique (20) dans ladite poutre lisseuse (B), afin d'adapter la vitesse de mouvement du vérin hydraulique (20) à au moins un paramètre de lissage.
EP09013219.2A 2009-10-20 2009-10-20 Poutre lisseuse et finisseuse de route Active EP2325390B2 (fr)

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Application Number Priority Date Filing Date Title
EP09013219.2A EP2325390B2 (fr) 2009-10-20 2009-10-20 Poutre lisseuse et finisseuse de route
PL09013219T PL2325390T5 (pl) 2009-10-20 2009-10-20 Deska równająca i zespół maszynowy do budowy dróg
JP2010228263A JP5751793B2 (ja) 2009-10-20 2010-10-08 道路仕上げ機用スクリード
US12/907,341 US8353642B2 (en) 2009-10-20 2010-10-19 Screed for road finishing machine
CN201010512860.5A CN102041770B (zh) 2009-10-20 2010-10-20 用于路面整修机的刮板

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EP2325390B1 true EP2325390B1 (fr) 2012-05-30
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JP2011089387A (ja) 2011-05-06
CN102041770A (zh) 2011-05-04
PL2325390T5 (pl) 2019-12-31
CN102041770B (zh) 2014-11-19
EP2325390A1 (fr) 2011-05-25
PL2325390T3 (pl) 2012-12-31
US8353642B2 (en) 2013-01-15
JP5751793B2 (ja) 2015-07-22
EP2325390B2 (fr) 2019-06-26
US20110091278A1 (en) 2011-04-21

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