EP0446206A1 - Process and device for control of a twin-cylinder thick matter pump. - Google Patents
Process and device for control of a twin-cylinder thick matter pump.Info
- Publication number
- EP0446206A1 EP0446206A1 EP89908162A EP89908162A EP0446206A1 EP 0446206 A1 EP0446206 A1 EP 0446206A1 EP 89908162 A EP89908162 A EP 89908162A EP 89908162 A EP89908162 A EP 89908162A EP 0446206 A1 EP0446206 A1 EP 0446206A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- reversing
- delivery
- pump
- hydraulic
- cylinders
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000008569 process Effects 0.000 title claims abstract description 31
- 230000001960 triggered effect Effects 0.000 claims abstract description 14
- 230000006835 compression Effects 0.000 claims abstract 2
- 238000007906 compression Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 4
- 210000000056 organ Anatomy 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract 2
- 239000012530 fluid Substances 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 description 2
- 235000010678 Paulownia tomentosa Nutrition 0.000 description 1
- 240000002834 Paulownia tomentosa Species 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B7/00—Piston machines or pumps characterised by having positively-driven valving
- F04B7/02—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated
- F04B7/0233—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers
- F04B7/0258—Piston machines or pumps characterised by having positively-driven valving the valving being fluid-actuated a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an orbital movement, e.g. elbow-pipe type members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
- F04B9/1176—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor
- F04B9/1178—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each piston in one direction being obtained by a single-acting piston liquid motor the movement in the other direction being obtained by a hydraulic connection between the liquid motor cylinders
Definitions
- The. invention relates to a method and a device for controlling a thick matter umpe with two conveying cylinders, which open into a material feed container via front openings and by means of at least one hydraulic reversing pump and hydraulic drive cylinders 2 actuated in push-pull manner, with a delivery cylinder within the material feed container Arranged, alternately connected on the inlet side to the openings of the delivery cylinders and hydraulically actuated pipe separators which open the respective other openings and which can be connected on the outlet side to a delivery line, a reversing process of the pipe switch being triggered each time the pressure stroke in the delivery cylinders is terminated and during the Um Kunststoffvor ⁇ the thick matter feed is interrupted.
- a method for controlling a two-cylinder thick matter pump of this type is known (DE-OS 32 53 576), in which both the drive cylinders of the delivery cylinders and the hydraulic actuating organs of the pipe switch are operated directly with the pressure oil delivered by the hydraulic reversing pump . be charged.
- 2/2-way seat valves are installed in the lines of the main delivery circuit leading to the drive cylinders, which in turn can be controlled via a deceleration valve.
- the reversing pump is switched over by an electrical end position signal immediately upon completion of a pressure stroke triggered.
- the delay valve is reversed at the moment the reversing pump is switched over so that the 2/2 e-seat valves are brought into their closed position are so that the pressure medium cannot flow from the reversing pump into the lines leading to the drive cylinders.
- a sufficient pressure builds up in the respective high-pressure line leading to the actuating members in order to switch through the hydraulic actuating members of the pipe switch via a reversing valve.
- the switching of the reversing valve is delayed by means of a throttle chain until the pipe switch is switched over. Then the 2/2-way seat valves are opened again for both flow directions.
- the invention is based on the object of developing a method and a device for controlling a thick matter pump of the type specified at the outset, with which hydraulic sequence control of the drive cylinders and the pipe switch is possible without fittings in the main oil circuit.
- a preferably hydraulic or electrical end position signal for triggering the reversing process is tapped on the pipe switch or on its hydraulic actuating members after each switchover process.
- the pressure oil supply to the actuators of the pipe switch is interrupted or reversed with compensation for the oil flow reversal in the main circuit.
- the hydraulic actuating organs of the pipe switch are expediently held under the action of the pressure generated by the reversing pump until a reversal process is triggered when the pressure stroke is ended while maintaining the conveying direction of the reversing pump.
- the delivery volume and / or the delivery pressure of the reversing pump is changed while maintaining the delivery direction.
- the reversing pump can be briefly controlled to the maximum delivery volume and can then be readjusted according to a predetermined delivery volume or delivery pressure.
- the free-flow circuit according to the invention enables at least one additional reversing pump to be connected in parallel to the main circuit in the event of higher demands on the delivery rate, without additional measures, in particular without exchanging other fittings.
- a device for carrying out the method according to the invention advantageously has an adjusting and regulating mechanism for setting the delivery direction and, if appropriate, the delivery rate of the reversing pump, which can be acted upon with hydraulic or electrical end position signals that can be tapped at the pipe switch or at its hydraulic actuating members.
- the hydraulic actuators of the pipe switch can be acted upon with pressure oil branched from the valve-free main circuit leading from the reversing pump to the drive cylinders.
- a directional control valve which reverses the direction of the pressure oil supply is expediently arranged in the hydraulic line branching from the main circuit and leading to the hydraulic actuating elements of the pipe switch and can be actuated via a pilot control signal which responds to the conveying direction of the reversing pump.
- a further directional valve which can be actuated by the position signals of the conveying cylinder or its drive cylinders, can be arranged, which can be switched over upon completion of a pressure stroke and which triggers the reversing process of the pipe switch.
- the single figure shows the circuit of a control arrangement for a free-flow sequence control of drive cylinders and tubular switch cylinders in a single-circuit arrangement.
- the thick matter pump essentially consists of two delivery cylinders 1, 1 ', the front openings 2, 2' of which open into a material container (not shown) and can be connected alternately to a delivery line 4 via a pipe switch 3 during the pressure stroke.
- the delivery cylinders will be 1,1 '.
- Via hydraulic drive cylinders 5, 5 'and the reversing hydraulic pump 6, which is designed as a swash plate axial piston pump in the exemplary embodiment shown, is driven in push-pull mode.
- the delivery pistons 7,7 ' are connected to the pistons 8,8' of the drive cylinders 5,5 'via a common piston rod 9,9'.
- a water box 10 through which the piston rods 9, 9 'extend.
- the drive cylinders 5, 5 ' are pressurized with pressure oil on the bottom side via the pressure lines 11, 11' of the main circuit with the aid of the reversing pump 6 and are hydraulically connected to one another at their rod-side end via a transverse line 12.
- a pressure compensation line 14 which contains a check valve 13 and bridges the relevant drive piston 8 'in its end positions, is arranged at the two ends of the drive cylinder 5'.
- the direction of movement of the drive piston 8,8 * and thus the delivery piston 7,7 ' is reversed in that the swash plate 15 of the reversing pump 6 is triggered by a reversing signal is swung through the zero position and thus the direction of delivery of the pressure oil in the lines 11, 11 'of the main circuit changes in the free flow.
- the delivery rate of the reversing pump 6 is determined at a predetermined drive speed by the swivel angle of the swash plate 15.
- the swash plate angle and thus the delivery amount is adjustable in proportion to a control pressure p which actuates the actuating cylinder 18 via the lines 16, 17 and 17 'and the reversing valve 20 located in the relevant line path.
- the control pressure p can be varied in accordance with the switching states of the thick matter pump using hydraulic or electrical means, not shown.
- pressure regulators 70 and 71 are provided, the control inputs of which can be connected via a changeover valve 72 or a directional control valve 73 to the line 11, 11 'of the main circuit which carries high pressure or low pressure.
- the switchover of the pipe switch 3 takes place via the hydrocyliners 21, 21 r , which are preferably designed as plunger cylinders, and directly via the lines 22, 22 'branched off from the main circuit, the reversing valve 30 and the pressure lines 23, 23' of the reversing pump 6 are supplied with pressurized oil.
- the pilot control of the U control valve 30 takes place hydraulically via the lines 24, 24 ', which via the directional control valves 31 and 40 with the control pressure, together with the reversing pump 6 driven auxiliary pump 25 can be acted upon.
- the directional control valve 31 is dimensional x or over the electrically or hydraulically gege ⁇ appropriate, ⁇ tapped Endlage ⁇ sig- xx of the drive cylinder 5 operable rend das.-way valve 40 in accordance with the quaint ⁇ in the leading to the actuating cylinder 18 control lines 17,17 ' prevailing pressure over the lines 28,28 'is reversible.
- the main control valve 20, which determines the delivery direction of the reversing pump 6, is actuated via end position signals of the pipe switch cylinders 21, 21 ', which can be tapped via the hydraulic lines 26, 26' and / or via electrical signal transmitters y.
- the auxiliary pump 25 also charges the closed main circuit via the check valves 75, 75 'and is secured by the pressure-limiting valve 74.
- the circuit arrangement shown leads to a sequence control of the drive cylinders 5, 5 'and the tube switch cylinders 21, 21', which functions as follows:
- a reversal of the directional control valve 31 is triggered via the electrically tapped end position signal x.
- Characterized the Umsteu ⁇ is' operation on the diverter cylinders 21,21 'reversed erventil 30 under triggering of a reversing change, wherein the conveying direction of the reversible pump 6 remains keep initially er ⁇ and the drive pistons 8,8' via the Pressure oil in line 11 are kept in their respective end positions.
- the valve 20 is reversed via the corresponding position signal.
- Characterized changes Vor ⁇ control on the adjusting cylinder 18 so that the swash plate 15 by pivots tung the reversible pump 6 under the Umledgeu ⁇ g 'Förderrich-.
- the reversal signal is tapped in parallel between the valve 20 and the actuating cylinder 18 and switched to the pilot control of the valve 40 via the lines 28, 28 '.
- the valve 40 thus changes its position and thus ensures that the tube switch cylinders 21, 21 'maintain the previously assumed end position despite the reversal of the direction of delivery of the reversing pump 6.
- pilot valve 40 Since the pilot valve 40 responds to the reversing signal faster than the reversing pump 6, adjustable throttles 29, 29 'are arranged in the pilot lines 28, 28', which prevent undesired switching back of the pipe switch cylinders 21, 21 'in the course of the reversal of the conveying direction adapted to the time behavior of the reversing pump 6 cause the pilot valve 40 and thus the directional control valve 30 to slowly switch through.
- the return valve 32 upstream of the reversing valve 20 in the control lines 26, 26 ', the drive cylinders 5, 5' can be acted upon in the opposite manner if necessary, so that material is conveyed back from the delivery line into the storage container.
- the described circle arrangement is particularly suitable for smaller or slow-running systems which are dependent on the smallest possible number of hydraulic assemblies.
- a two-circuit sequential circuit is suitable, in which the pipe switch reversing valve 30 is not connected to the main circuit via the lines 22, 22 ', but to a separate hydraulic circuit. In the latter case, the directional valve 40 can be omitted.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
L'invention concerne une commande séquentielle destinée à une pompe à liquides épais comportant deux cylindres de refoulement (1, 1') débouchant, par l'intermédiaire d'ouvertures frontales (2, 2'), dans une trémie, et une dérivation (3) à commande hydraulique, qui est située à l'intérieur de la trémie et peut être reliée côté entrée en alternance à chacune des ouvertures (2, 2') des cylindres de refoulement (1, 1'), laissant libre l'autre ouverture, et qui peut être reliée côté sortie à une canalisation de refoulement (4). Les cylindres de refoulement (1, 1') sont reliés à des vérins hydrauliques de commande (5, 5') qui sont actionnés en mode push-pull par au moins une pompe réversible hydraulique (6). A la fin de chaque course de compression dans les cylindres de refoulement (1,l 1') est déclenché un processus d'inversion de la dérivation (3) pendant lequel est interrompu le refoulement des liquides épais. Pendant ce processus d'inversion, le sens de refoulement de la pompe réversible (6) est initialement maintenu inchangé, avec maintien d'une amenée libre de fluide hydraulique au vérin de commande (5, 5'), et ce n'est qu'à l'achèvement du processus d'inversion de la dérivation (3) que le sens de refoulement est inversé. Pour déclencher cette inversion du sens de marche, un signal hydraulique ou électrique de fin de course (y, y, 26, 26') est détecté au niveau de la dérivation (3) ou de ses organes hydrauliques de commande (21, 21') après chaque processus d'inversion.The invention relates to a sequential control for a thick liquid pump comprising two delivery cylinders (1, 1 ') opening, via front openings (2, 2'), into a hopper, and a bypass ( 3) hydraulically controlled, which is located inside the hopper and can be connected on the inlet side alternately to each of the openings (2, 2 ') of the discharge cylinders (1, 1'), leaving the other free opening, and which can be connected on the outlet side to a discharge pipe (4). The delivery cylinders (1, 1 ') are connected to hydraulic control cylinders (5, 5') which are actuated in push-pull mode by at least one hydraulic reversible pump (6). At the end of each compression stroke in the delivery cylinders (1, l 1 '), a bypass reversal process (3) is triggered during which the delivery of thick liquids is interrupted. During this reversal process, the direction of discharge of the reversible pump (6) is initially kept unchanged, with maintenance of a free supply of hydraulic fluid to the control cylinder (5, 5 '), and this is only 'at the end of the bypass reversal process (3) the discharge direction is reversed. To trigger this reversal of the direction of travel, a hydraulic or electrical limit switch signal (y, y, 26, 26 ') is detected at the bypass (3) or its hydraulic control members (21, 21'). ) after each reversal process.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3840892 | 1988-12-05 | ||
DE3840892A DE3840892A1 (en) | 1988-12-05 | 1988-12-05 | METHOD AND DEVICE FOR CONTROLLING A TWO-CYLINDER FUEL PUMP |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0446206A1 true EP0446206A1 (en) | 1991-09-18 |
EP0446206B1 EP0446206B1 (en) | 1993-06-16 |
Family
ID=6368470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89908162A Expired - Lifetime EP0446206B1 (en) | 1988-12-05 | 1989-07-11 | Process and device for control of a twin-cylinder thick matter pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US5344290A (en) |
EP (1) | EP0446206B1 (en) |
JP (1) | JPH04501897A (en) |
DE (2) | DE3840892A1 (en) |
WO (1) | WO1990006444A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6929454B2 (en) | 2000-07-24 | 2005-08-16 | Putzmeister Aktiengesellschaft | Thick matter pump |
CN108146877A (en) * | 2017-12-15 | 2018-06-12 | 太仓佳锐精密模具有限公司 | Control device is rotated under a kind of barrel limited |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4141108A1 (en) * | 1991-12-13 | 1993-06-17 | Putzmeister Maschf | DEVICE FOR REGULATING THE OUTLET PRESSURE OF A PUMP |
DE19542258A1 (en) * | 1995-11-13 | 1997-05-15 | Putzmeister Maschf | Method and device for controlling a two-cylinder thick matter pump |
DE10150467A1 (en) * | 2001-10-16 | 2003-04-17 | Putzmeister Ag | Pump for chick material, comprises IC engine drive and at least one hydraulic pump of reversible type |
US6592334B1 (en) * | 2001-12-21 | 2003-07-15 | Weatherford/Lamb, Inc. | Hydraulic multiphase pump |
US7175394B2 (en) * | 2001-12-21 | 2007-02-13 | Weatherford/Lamb, Inc. | Hydraulic multiphase pump |
US6736376B1 (en) * | 2002-03-19 | 2004-05-18 | Delisle Gilles L. | Anti-detonation fuel delivery system |
DE102004015419A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for controlling a slurry pump |
WO2005121555A1 (en) * | 2004-06-07 | 2005-12-22 | Hunter Hitech Pty Ltd | A pump assembly |
DE102005008217A1 (en) * | 2005-02-22 | 2006-08-31 | Putzmeister Ag | Hydraulic drive for two-cylinder thick matter pumps, has main pump, and blocking valve to block rinsing oil flow and to release oil flow after time delay, while diverting oil flow from low pressure side of hydraulic circuit into oil tank |
IT1393038B1 (en) * | 2009-02-09 | 2012-04-11 | Imer Int Spa | PUMP FOR CLACESTRUZZO |
DE102011083874A1 (en) * | 2011-09-30 | 2013-04-04 | Putzmeister Engineering Gmbh | Hydraulic system with suction return filter |
CN102979692B (en) * | 2012-05-22 | 2014-08-06 | 北汽福田汽车股份有限公司 | Tandem hydraulic cylinder device, control method thereof and pumping device |
CN103114983B (en) * | 2012-06-27 | 2014-01-01 | 中联重科股份有限公司 | Pumping stroke control method of viscous material double-cylinder pump and viscous material pumping equipment |
DE102018130480A1 (en) * | 2018-11-30 | 2020-06-04 | Liebherr-Betonpumpen Gmbh | Two-cylinder slurry pump |
EP4395977A1 (en) | 2021-09-03 | 2024-07-10 | Readily3D SA | Method for digital analytic correction of photoresponsive material reactivity in additive manufacturing |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3327641A (en) * | 1965-03-08 | 1967-06-27 | Air Placement Equipment Co Inc | Concrete pump |
FR2040855A5 (en) * | 1969-04-23 | 1971-01-22 | Richier Sa | |
US4036564A (en) * | 1971-08-02 | 1977-07-19 | Richards John A | Concrete pumping apparatus |
GB1452561A (en) * | 1973-11-16 | 1976-10-13 | Fogt Indmasch | Apparatus for pumping wet concrete |
IT1014858B (en) * | 1974-06-07 | 1977-04-30 | Ripamonti E | THREE-WAY DISTRIBUTING VALVE FOR TWO-CYLINDER PUMPS FOR CAL CESTRUZZO |
DE3243576A1 (en) * | 1982-11-25 | 1984-05-30 | Karl Dipl.-Ing. 7000 Stuttgart Schlecht | Two-cylinder piston pump, especially for thick matter |
JPS59206683A (en) * | 1983-05-09 | 1984-11-22 | Mitsubishi Heavy Ind Ltd | Concrete pump |
DE3346820A1 (en) * | 1983-12-23 | 1985-07-04 | Linde Ag, 6200 Wiesbaden | Hydrostatic drive for a concrete piston pump |
-
1988
- 1988-12-05 DE DE3840892A patent/DE3840892A1/en not_active Ceased
-
1989
- 1989-07-11 US US07/690,915 patent/US5344290A/en not_active Expired - Fee Related
- 1989-07-11 DE DE8989908162T patent/DE58904753D1/en not_active Expired - Fee Related
- 1989-07-11 WO PCT/EP1989/000805 patent/WO1990006444A1/en active IP Right Grant
- 1989-07-11 JP JP1507739A patent/JPH04501897A/en active Pending
- 1989-07-11 EP EP89908162A patent/EP0446206B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9006444A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6929454B2 (en) | 2000-07-24 | 2005-08-16 | Putzmeister Aktiengesellschaft | Thick matter pump |
CN108146877A (en) * | 2017-12-15 | 2018-06-12 | 太仓佳锐精密模具有限公司 | Control device is rotated under a kind of barrel limited |
Also Published As
Publication number | Publication date |
---|---|
WO1990006444A1 (en) | 1990-06-14 |
US5344290A (en) | 1994-09-06 |
DE58904753D1 (en) | 1993-07-22 |
DE3840892A1 (en) | 1990-06-07 |
EP0446206B1 (en) | 1993-06-16 |
JPH04501897A (en) | 1992-04-02 |
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