EP3542060A1 - Dickstoffpumpe mit einstellbarer begrenzung des förderdrucks - Google Patents
Dickstoffpumpe mit einstellbarer begrenzung des förderdrucksInfo
- Publication number
- EP3542060A1 EP3542060A1 EP17816475.2A EP17816475A EP3542060A1 EP 3542060 A1 EP3542060 A1 EP 3542060A1 EP 17816475 A EP17816475 A EP 17816475A EP 3542060 A1 EP3542060 A1 EP 3542060A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- pilot valve
- pump
- adjustable
- hydraulic
- 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
- 239000011345 viscous material Substances 0.000 title abstract 5
- 239000012530 fluid Substances 0.000 claims abstract description 39
- 239000010802 sludge Substances 0.000 claims description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
- 239000002002 slurry Substances 0.000 description 12
- 238000005086 pumping Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000926 separation method Methods 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/02—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having two cylinders
-
- 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
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/34—Control not provided for in groups F04B1/02, F04B1/03, F04B1/06 or F04B1/26
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
-
- 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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- 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
- F04B9/1172—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 pump piston in the two directions being obtained by a double-acting piston liquid motor
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
Definitions
- the invention relates to a slurry pump comprising a hydraulically driven two-cylinder piston pump for generating a thick matter delivery pressure, and a hydraulic pump, which acts on the two-cylinder piston pump via a drive line with hydraulic fluid, wherein the Dickstoffforder founded is adjustable limited.
- Such thick matter pumps are used for example for conveying concrete from a hopper into a delivery line.
- the high-pressure discharge pressure in the delivery line can be well over 200 bar for stationary high-solids pumps.
- the delivery lines used must be designed for such Dickstoffforder horr. In the construction of tall structures, such as skyscrapers or bridge pylons, the delivery lines are laid vertically to the building upwards and can bridge heights of up to 500 m or more.
- a concrete spreader mast is often connected to distribute the concrete pumped up the building to the top level of the job site.
- a concrete distribution boom usually includes a folding mast with which the concrete is distributed.
- the articulated mast in the rule on delivery tubes, which are limited to a load by a thick matter delivery pressure of about 85 bar. If there is a stoppage in the delivery lines or delivery pipes of the distribution boom due to blockages, especially if the concrete distribution tower is connected at a lower height to the delivery line, Set a critical Dickstoff handtik that brings the delivery line or the weaker delivery tubes of the distribution boom to bursting.
- a simple and safe adjustable limitation of the thick matter delivery pressure is required. In other applications, the adjustable limitation of the thick matter delivery pressure is useful for securing equipment connected to the thick matter pump, such as concrete delivery hoses.
- the thick matter delivery pressure of the sludge pump must be adapted to the situation on the construction site, so that no critical thick matter delivery pressure can build up in the delivery pipes or lines connected to the sludge pump, which can rupture the pipes or lines.
- today used thick matter pumps have a preset pressure control of the hydraulic drive of the two-cylinder piston pump, which is usually set at the factory before the first commissioning and is difficult to access.
- the ratio of the thick matter delivery pressure to the hydraulic pressure in a two-cylinder piston pump is in principle easily derivable from one another via the ratio of the piston surfaces of the hydraulic cylinders and the thick matter delivery cylinders. If the hydraulic pressure rises above a fixed setpoint value, the pressure control automatically returns the delivery rate of the hydraulic pump in order to limit the hydraulic pressure and thus also the thick matter delivery pressure.
- This type of pressure control is also referred to as pressure cutoff.
- an adjustable pressure relief valve is also provided in the prior art, which limits the pressure of the hydraulic fluid in the drive line to a maximum value.
- the set maximum pressure is set lower than the target pressure of the pressure control, this will override the preset pressure control, so that the capacity of the hydraulic pump is no longer automatic is withdrawn. This creates unnecessary losses and the hydraulic fluid is heated.
- the target pressure of the pressure control and the maximum pressure of the hydraulic fluid should be easily and safely adaptable to the individual conditions on the particular site.
- the at least one hydraulic pump for limiting the thick matter delivery pressure has a pressure control adjustable to a desired pressure of the hydraulic fluid and the pressure of the hydraulic fluid in the drive line is limited to an adjustable maximum pressure via an adjustable pressure limiting valve is, wherein the target pressure of the pressure control and the maximum pressure of the hydraulic fluid can be adjusted by a common actuator.
- the advantages achieved by the invention result from the fact that the target pressure of the pressure control and the maximum pressure of the hydraulic fluid can be adjusted by a common control element simple and error-prone.
- the pressure control which is easily adjustable in this way, simplifies the limitation of the thick matter delivery pressure by means of the adjustable hydraulic pump.
- the pressure of the hydraulic fluid in the drive line is automatically limited by an adjustable pressure relief valve to a maximum value matching the desired value of the pressure control.
- control element is designed to set the target pressure of the pressure control and the maximum pressure of the hydraulic fluid in the same concurrent manner that the maximum pressure is always a predetermined differential pressure above the target pressure. In this way, it is ensured that the settings on the common control element lead to any change in the safety precautions and efficiency of Dickstoff pump.
- a preferred embodiment provides that the actuating element has an adjustable to the desired pressure of the hydraulic fluid first pilot valve, which is connected on the input side with a lock slider of the pressure control of the hydraulic pump and the output side is relieved in a hydraulic reservoir, wherein the first pilot valve opens from reaching the target pressure.
- this first pilot valve is a simple, but safe way to cut off the pressure of the hydraulic fluid at the target pressure.
- control element has a second pilot valve
- the input side is connected to a main stage of the pressure relief valve and the output side to the input side of the first pilot valve, wherein the second pilot valve opens from the predetermined differential pressure between the input and output side.
- This second pilot valve thus ensures that the predetermined by the pressure relief valve maximum pressure in the drive line is always automatically to the differential pressure above the target pressure of the pressure cut, ie the maximum pressure is automatically set with the setting of the target pressure correctly to a matching maximum pressure. This reliably does not lead to undesired interactions between the pressure regulation of the hydraulic pump and the pressure relief by the pressure limiting valve.
- the Safety is always ensured because the main stage of the pressure relief valve opens when the pressure in the drive line exceeds the set point and reaches a pressure value that is well above the setpoint pressure.
- the predetermined differential pressure between the input and output side of the second pilot valve is optimally about 20 bar, as this ensures adequate reliability of the slurry pump.
- the second pilot valve is not adjustable. In this way it can be ensured that the adjustment possibilities via the adjusting element do not lead to a limited operational reliability of the slurry pump due to manual adjustments to the second pilot valve.
- An advantageous embodiment of the invention provides that the first pilot valve is adjustable via a handwheel.
- the adjustment of the first pilot valve via a handwheel makes the adaptation of the slurry pump to the conditions on the site for the individual purpose particularly simple and safe.
- the handwheel is lockable and / or lockable.
- a locking possibility of the hand wheel prevents unwanted changes in the settings of the first pilot valve and thus on the actuator.
- the possibility of locking the handwheel also ensures that changes to the position of the handwheel are made only by authorized personnel.
- a further advantageous embodiment of the invention is that the actuating element has a non-adjustable third pilot valve, which is connected in parallel with the first pilot valve and opens when a maximum permissible pressure is reached.
- a parallel to the first pilot valve third pilot valve which opens at a maximum allowable pressure and relieves the pressure control in a hydraulic reservoir, provides additional protection against malfunction or high setting of the adjustable first pilot valve.
- a preferred embodiment provides that the first pilot valve, a switching valve is connected upstream, in such a way that the third pilot valve to the arrangement of the first pilot valve and switching valve is connected in parallel, wherein the switching valve, the connection of the input side of the first pilot valve with the adjusting slide of the pressure control optionally manufactures or separates.
- Such a switching valve allows easy adjustment of the target pressure of the pressure control between the set at the first pilot valve target pressure and the maximum allowable pressure of the pressure control, which is predetermined by the third pilot valve. As a result, the limitation of the thick matter delivery pressure on the slurry pump to the maximum allowable pressure can be adjusted very quickly, without a change to the first adjustable pilot valve is necessary.
- An advantageous embodiment of the invention provides that the switching valve is latching and / or lockable.
- a Einrastitzkeit the switching valve prevents unintentional position changes to the switching valve and thus to the actuator.
- the Abschhnennenkeit the changeover valve also ensures that changes to the position of the change-over only done by authorized personnel.
- FIG. 1 shows a thick matter pump according to the prior art
- FIG. 2 thick matter pump according to the invention
- FIG. 4 control element according to the invention
- Figure 5 Variant of the thick matter pump with remotely controllable pilot valve.
- FIG. 1 shows a schematic and partial view of a slurry pump 1 with a hydraulically driven two-cylinder piston pump 2 for producing a thick matter delivery pressure according to the prior art.
- the two hydraulic cylinders are indicated schematically and connected via connecting lines and a switching control 12, here for example an electro-hydraulically pilot operated 4/3-way valve, with a drive line 8, via which the two-cylinder piston pump 2 by a hydraulic pump 3, for example an axial piston variable , is acted upon with hydraulic fluid.
- a switching control 12 takes place an alternating action on the two hydraulic cylinders of the two-cylinder piston pump.
- hydraulic lines shown in the figures with continuous lines are so-called working lines, which are designed for high hydraulic fluid flows, while the hydraulic lines shown in broken lines represent control or measuring lines are designed for smaller hydraulic fluid flows.
- a pressure gauge 19 is coupled, at which the instantaneous pressure of the hydraulic fluid is read.
- the thick matter delivery pressure can be derived from one another via the ratio of the effective piston areas of the hydraulic cylinders and the thick matter delivery cylinders.
- the setting of the maximum target value of the pressure control of the hydraulic pump is arranged by means of one of the hydraulic pump 3 Locking slide 4 set manually. As soon as the pressure of the hydraulic fluid in the drive line 8 reaches this setpoint value, the pumping power of the hydraulic pump 3 is automatically reduced so that no losses occur in the hydraulic system when this limit value is reached.
- This setpoint is usually factory set at the first startup on the hydraulic pump and should not be changed in the rule.
- a pressure limiting unit 5a is connected to the working line 8 for safety.
- This pressure limiting unit 5a comprises the main stage of the pressure limiting valve 15, with a downstream pilot valve 18.
- the hydraulic pressure of the drive line 8 is passed through the nozzle equipped with a passage 17 through the main stage 15 through a further damping nozzle 20 to the pilot valve 18.
- a limiting pressure which should be slightly higher than the desired value of the setpoint to the hydraulic pump 3
- FIG. 2 shows schematically and partially a slurry pump 1 with a hydraulically driven two-cylinder piston pump 2 for producing a thick matter delivery pressure in accordance with FIG Invention.
- the mode of operation largely corresponds to the pump 1 shown in FIG. 1, for which reason only the setting according to the invention of the thick matter delivery pressure will be discussed below.
- a so-called open hydraulic system in which the hydraulic pump 3 always pumps the hydraulic fluid in the same direction and sucks the hydraulic fluid from a hydraulic reservoir (tank) 14.
- the invention is also applicable, for example, to known closed hydraulic systems, in which the switching of the pumping direction of the hydraulic cylinder of the two-cylinder piston pump 2 is effected by the pumping direction of the hydraulic pump 3 is reversed via a switching control.
- the thick matter pumping pressure generated by the thick matter pump 1 can be adjustable limit.
- the hydraulic pump 3 can be controlled to cut off the thick matter delivery pressure by a target pressure of the hydraulic fluid is set in the pressure control.
- the adjusting element 6 is connected via the connection X with the control slide 4 of the pressure control on the hydraulic pump 3.
- the pressure of the hydraulic fluid generated by the hydraulic pump 3 in the drive line 8 is limited to an adjustable by the pressure relief valve 5 maximum pressure.
- the adjusting element 6 is connected via the connection X1 to the main stage 15 of the pressure limiting valve 5.
- the actuator 6 is designed such that the target pressure of the pressure control and the maximum pressure of the hydraulic fluid in the drive line 8 can be adjusted concurrently. In this way, the maximum pressure of the hydraulic fluid in the drive line 8 is always a predetermined differential pressure above the target pressure of the Pressure control.
- the adjusting element 6 has an adjustable to the desired pressure of the hydraulic fluid first pilot valve 9, which is the input side connected to the spool 4 of the pressure control of the hydraulic pump 3 and the output side is relieved in a hydraulic reservoir 14.
- the first pilot valve 9 opens automatically upon reaching the set target pressure in the pressure control and thus ensures very simply that the set target pressure is maintained. In the embodiment, the target pressure in the pressure control between 0 and 315 bar via the first pilot valve 9 can be adjusted.
- a second pilot valve 7 of the control element 6 is the input side connected to the main stage 15 of the pressure relief valve 5 and the output side to the input side of the first pilot valve 9.
- This second pilot valve 7 has the property of adding the dynamic pressure from the outlet side directly to the setting value set via the adjusting spring and opens from a predetermined differential pressure between input and output side and thus provides the appropriate to the set value limitation of the pressure in the drive line 8 via the Pressure relief valve 5 safe.
- a predetermined differential pressure 20 bar are given in the embodiment.
- the second pilot valve 7, shown adjustably here is preferably preset in the factory, ie the predetermined pressure difference at which the pilot valve 7 switches can not be changed.
- the second pilot valve 7 acts on the main stage 15 of the pressure relief valve 5 to hedge in such a way that the pressure relief valve 5, the drive line 8 relieved of pressure as soon as the pressure of the hydraulic fluid in the drive line 8 exceeds a value to the preset pressure difference above the is set to the first pilot valve 9 setpoint of the pressure control of the hydraulic pump 3.
- the actuator 6 further includes an optional, to the first pilot valve 9 connected in parallel, non-adjustable third pilot valve 10, which relieves upon reaching a maximum allowable pressure in the hydraulic reservoir 14.
- the achievable here maximum allowable pressure is given in the embodiment with 320 bar. This maximum system pressure is factory set.
- This third pilot valve 10 ensures that errors in the first pilot valve 9 does not overload the entire system Slurry pump comes. In this way, the first pilot valve 9 and the third pilot valve 10 act directly on the spool valve 4 for the pressure separation of the hydraulic pump controller.
- the hedge is ensured by the third pilot valve 10 permanently.
- FIG. 3 shows a schematic and partial view of a thick matter pump 1 according to FIG. 1, in which case the adjusting element 6 has an additional switching valve 11.
- the switching valve 1 1 is connected upstream of the first pilot valve 9, in such a way that the third pilot valve 10 is connected in parallel to the arrangement of first pilot valve 9 and switching valve 1 1, wherein the switching valve 1 1, the connection of the input side of the first pilot valve 9 with the Locking slide 4 of the pressure control either produces or separates.
- the switching valve 1 1 allows easy adjustment of the target pressure of the pressure control between the set at the first pilot valve 9 target pressure and the maximum system pressure at the third pilot valve 10. In this way, the limitation of the thick matter delivery pressure can be adjusted very quickly, without changes in settings on the first adjustable Pilot valve 9 are necessary.
- the switching valve 1 1 is designed as a ball valve.
- the actuator 6 can therefore also be easily reset via the switching valve 1 1 to the lower, set pressure.
- FIG. 4 shows a constructive realization of the adjusting element 6 according to FIG. 2, schematically from the outside.
- the adjusting element 6 is designed as a special block and can be positioned at a location of the thick matter pump 1 (FIG. 1 or 2) which can be easily reached by the user.
- the first pilot valve 9 can be adjusted via a handwheel 13.
- the handwheel 13 is lockable and lockable.
- the set value can be secured to the first pilot valve 9.
- the switching valve shown 1 1 can be easily handled and is designed to be latching and lockable.
- the Control element 6 also has measuring connections 16 with which can be tapped information on the pressure conditions in the actuator 6.
- the operator can thus simply set the hydraulic pressure so that the maximum thick matter delivery pressure can not be exceeded.
- the pilot valve 9, but also the switching valve 1 1, for example, could be electrically controlled by remote control. Furthermore, a spatially separate arrangement of the valves of the control element 6 is conceivable.
- pilot valve 9 is electrically remote controlled adjustable
- the pilot valve 9 is designed here as an electrically controlled proportional pressure relief valve and is controlled by an electronic control unit 23.
- the control electronics 23 measures by means of the pressure sensor 21, the hydraulic drive pressure of the two-cylinder piston pump 2 and derives therefrom the thick matter delivery pressure on the ratio of the effective piston surfaces of the hydraulic cylinder and the thick matter delivery cylinder to each other.
- an operating unit 22 which is equipped with a keyboard and a screen, as shown, or for example, with a touch screen, the operator here only the desired maximum delivery pressure of the two-cylinder piston pump 2 before.
- the control electronics 23 determines from the measured by the pressure sensor 21 hydraulic pressure and the maximum thicker material delivery pressure specified by the operator, as already described above, with blocked two-cylinder piston pump 2, the correct setting of the pilot valve 9 and adjusts it via the control line accordingly. Based on a predetermined, stored system side valve characteristic, the control electronics 23, for example, without the blocking of the two-cylinder piston pump 2 set the pilot valve 9. With the help of the pressure sensor 21, the setting can be controlled and readjusted if necessary.
- the preset remotely controlled reduction of the limiting pressure of the pressure cut can be easily overridden. That by pressing the change-over valve 1 1, the predetermined over the third pilot valve 10 maximum system pressure for the pressure cut is again set, which is 20 bar in the example shown here below the limit pressure defined by the pilot valve 7 and the pressure relief valve 5 limit pressure.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016122392.1A DE102016122392A1 (de) | 2016-11-21 | 2016-11-21 | Dickstoffpumpe mit einstellbarer Begrenzung des Förderdrucks |
PCT/EP2017/079962 WO2018091747A1 (de) | 2016-11-21 | 2017-11-21 | Dickstoffpumpe mit einstellbarer begrenzung des förderdrucks |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3542060A1 true EP3542060A1 (de) | 2019-09-25 |
EP3542060B1 EP3542060B1 (de) | 2020-11-18 |
Family
ID=60702598
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17816475.2A Active EP3542060B1 (de) | 2016-11-21 | 2017-11-21 | Dickstoffpumpe mit einstellbarer begrenzung des förderdrucks |
Country Status (4)
Country | Link |
---|---|
US (1) | US11092143B2 (de) |
EP (1) | EP3542060B1 (de) |
DE (1) | DE102016122392A1 (de) |
WO (1) | WO2018091747A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019105871A1 (de) | 2019-03-07 | 2020-09-10 | Liebherr-Mischtechnik Gmbh | Gelenkarm-Steuerung einer Betonpumpe |
CN110701032A (zh) * | 2019-10-23 | 2020-01-17 | 徐州晟源环境科技有限公司 | 一种恒压恒流量污泥泵送系统 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3709504C2 (de) * | 1987-03-23 | 1995-02-02 | Rexroth Mannesmann Gmbh | Ventileinrichtung |
DE3812753C2 (de) * | 1988-04-16 | 1994-05-26 | Rexroth Mannesmann Gmbh | Ventilanordnung für eine verstellbare Pumpe |
WO1990009528A1 (en) * | 1989-02-20 | 1990-08-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic circuit for working machines |
DE19503986A1 (de) * | 1995-02-07 | 1996-08-08 | Hudelmaier Ulrike | Verfahren und Vorrichtung zum Fördern von Beton oder anderen Dickstoffen |
DE10040737A1 (de) | 2000-08-17 | 2002-02-28 | Mannesmann Rexroth Ag | Ventilanordnung |
DE102005035981A1 (de) * | 2005-07-28 | 2007-02-01 | Putzmeister Ag | Hydraulische Schaltungsanordnung, insbesondere für den Antrieb von Betonverteilermasten |
DE102012216242A1 (de) | 2012-09-13 | 2014-03-13 | Putzmeister Engineering Gmbh | Vorrichtung zur Antriebssteuerung einer Zweizylinder-Dickstoffpumpe |
-
2016
- 2016-11-21 DE DE102016122392.1A patent/DE102016122392A1/de not_active Withdrawn
-
2017
- 2017-11-21 EP EP17816475.2A patent/EP3542060B1/de active Active
- 2017-11-21 US US16/462,412 patent/US11092143B2/en active Active
- 2017-11-21 WO PCT/EP2017/079962 patent/WO2018091747A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
EP3542060B1 (de) | 2020-11-18 |
US11092143B2 (en) | 2021-08-17 |
US20190309737A1 (en) | 2019-10-10 |
WO2018091747A1 (de) | 2018-05-24 |
DE102016122392A1 (de) | 2018-05-24 |
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