EP3247503B1 - Pumpenanordnung und entsprechendes betriebsverfahren - Google Patents

Pumpenanordnung und entsprechendes betriebsverfahren Download PDF

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Publication number
EP3247503B1
EP3247503B1 EP16700526.3A EP16700526A EP3247503B1 EP 3247503 B1 EP3247503 B1 EP 3247503B1 EP 16700526 A EP16700526 A EP 16700526A EP 3247503 B1 EP3247503 B1 EP 3247503B1
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EP
European Patent Office
Prior art keywords
pumps
pump
individual
outlet
pressure
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.)
Active
Application number
EP16700526.3A
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German (de)
English (en)
French (fr)
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EP3247503A1 (de
Inventor
Alexander RÜGER
Marcus DUSCHEK
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Duerr Systems AG
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Duerr Systems AG
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Publication of EP3247503A1 publication Critical patent/EP3247503A1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
    • B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
    • B05B12/14—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet
    • B05B12/1418—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet
    • B05B12/1445—Arrangements for controlling delivery; Arrangements for controlling the spray area for supplying a selected one of a plurality of liquids or other fluent materials or several in selected proportions to a spray apparatus, e.g. to a single spray outlet for supplying several liquids or other fluent materials in selected proportions to a single spray outlet pumping means for the liquids or other fluent materials being mechanically linked, e.g. master and slave pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/14—Arrangements for preventing or controlling structural damage to spraying apparatus or its outlets, e.g. for breaking at desired places; Arrangements for handling or replacing damaged parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0406—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material with several pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1007—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material
    • B05C11/1013—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to condition of liquid or other fluent material responsive to flow or pressure of liquid or other fluent material
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • 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
    • F04B49/02—Stopping, starting, unloading or idling control
    • 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
    • F04B49/06—Control using electricity
    • 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
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/10—Other safety measures
    • F04B49/103—Responsive to speed
    • 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
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/137—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers the pumping members not being mechanically connected to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
    • B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
    • B05B15/58—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter preventing deposits, drying-out or blockage by recirculating the fluid to be sprayed from upstream of the discharge opening back to the supplying means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B9/00—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour
    • B05B9/03—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material
    • B05B9/04—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump
    • B05B9/0403—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material
    • B05B9/0409—Spraying apparatus for discharge of liquids or other fluent material, without essentially mixing with gas or vapour characterised by means for supplying liquid or other fluent material with pressurised or compressible container; with pump with pumps for liquids or other fluent material the pumps being driven by a hydraulic or a pneumatic fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1044—Apparatus or installations for supplying liquid or other fluent material to several applying apparatus or several dispensing outlets, e.g. to several extrusion nozzles

Definitions

  • the invention relates to a pump arrangement, in particular in a coating installation for coating components, in particular in a painting installation for painting motor vehicle body components. Furthermore, the invention relates to an operating method for such a pump arrangement.
  • sealant e.g. PVC: polyvinyl chloride
  • the sealant can be applied by application robots that guide an applicator along the seams over the component surface.
  • application robots usually, several application robots are used simultaneously in a coating booth, which draw the sealant from a common supply line.
  • the material is supplied by several pumps that are interconnected on the input and output side and pump the sealant into the supply line. Due to the fact that the individual pumps are connected in parallel, it is necessary to set the pump speed manually once so that the pumps can work together. In normal coating operation, the pumps are then switched on or off simultaneously and together.
  • a disadvantage of this conventional pump arrangement is first of all the fact that there is no guaranteed pump start when required, ie it can happen that individual pumps do not start up with a switch-on signal and then stop during operation. This in turn can lead to uneven wear of the pumps, which is undesirable.
  • the sealant in the stopped pump can harden, which would lead to the destruction of the pump.
  • a pump stall can lead to process sequence errors.
  • the risk of individual pumps stalling requires a manual control effort.
  • the prior art also includes DE 600 13 013 T2 , DE 101 34 747 A1 , DE 41 18 869 A1 , DE 40 25 638 A1 and DE 37 11 053 A1 .
  • the invention is therefore based on the object of creating a correspondingly improved pump arrangement and a corresponding operating method for it.
  • the pump arrangement according to the invention initially provides several pumps in accordance with the prior art have an adjustable pump capacity and are used to convey a coating agent.
  • the coating agent can be a sealant (eg PVC: polyvinyl chloride) for seam sealing of weld seams on a motor vehicle body part.
  • a sealant eg PVC: polyvinyl chloride
  • the invention is not limited to sealants with regard to the coating agent, but can also be implemented with other coating agents, such as adhesive, paint, oil, silicone, insulating material or the like lich.
  • the pumps can be piston pumps, gear pumps, diaphragm pumps or wobble piston pumps, to name just a few.
  • the pumps are connected in parallel on the outlet side and inlet side, so that the pumps draw the coating agent to be conveyed from a common inlet line and convey it into a common outlet line.
  • One aspect of the invention therefore provides a monitoring unit which makes it possible to switch the individual pumps on and/or off at different times.
  • the invention differs in this aspect from the known pump arrangements described at the beginning, in which the pumps are switched on and off together (i.e. at the same time).
  • This individual switching on and off of the individual pumps enables, for example, a cyclical change of the switched-on pumps, so that the individual pumps alternate in operation.
  • the individual pumps in Each time there is a break in operation that can be used for maintenance purposes or to increase the service life of the pump.
  • the cyclic alternation of the pumps that are switched on makes it possible to maintain a reserve capacity without the pumps that form the reserve capacity remaining permanently switched off, which could lead to malfunctions, for example due to the coating agent curing in the permanently switched-off pumps.
  • the monitoring unit therefore preferably switches on only some of the pumps, while the remaining pumps are switched off.
  • the number of pumps switched on can be varied depending on the required pump capacity. If, for example, a large pump power is required, then a larger number of pumps are switched on than when a small pump power is required.
  • the monitoring unit then changes the switched-on part of the pumps after a predetermined period of operation, so that all pumps are switched on and off again one after the other.
  • This changeover of the part of the pumps that is switched on preferably takes place cyclically, so that the ratio of the switched-on time and the switched-off time is the same for all pumps.
  • the operating time after which the switched-on part of the pumps is changed is preferably between ten minutes and four hours, for example in a range from 30 minutes to two hours.
  • the monitoring unit can preferably also check whether the individual pumps are actually working or not.
  • the invention also differs from the known pump arrangements described at the outset, in which there is no guarantee that all pumps will function when required really start up, which is not automatically recognized with conventional pump arrangements.
  • a pump sensor is therefore preferably assigned to the individual pumps, which detects whether the respective pump is working or not. The monitoring unit can then issue a warning if a pump is switched on but is actually not working.
  • the pump sensor can detect the speed of a drive shaft of the pump or the piston speed.
  • the operating status (working/not working) of the individual pumps can also be determined by measuring the pressure at the outlet of the pump.
  • the invention is not limited to the examples described above.
  • the monitoring unit according to the invention also enables the pump output of the entire pump arrangement to be adapted to the current requirement. In this way, the monitoring unit can turn on an additional pump if the pump capacity of the entire pump arrangement is not sufficient.
  • the pump arrangement according to the invention therefore preferably has an outlet pressure sensor which is arranged in the common outlet line of the pumps and measures the outlet pressure of the entire pump arrangement. The monitoring unit then queries the outlet pressure from the outlet pressure sensor and compares it with a predetermined minimum pressure. If the outlet pressure falls below the specified minimum pressure, the monitoring unit can switch on an additional pump in order to increase the pump capacity of the entire pump arrangement.
  • the monitoring unit therefore preferably also enables leak detection, with the monitoring unit assuming a leak if the measured outlet pressure in the common outlet line of the pump arrangement falls below a predetermined minimum pressure for a predetermined minimum period of time.
  • reaction to a detected leak there are various options within the scope of the invention, which can be combined with one another or implemented in a time-staggered manner.
  • One possible reaction is a leakage warning, which can be output optically or acoustically, for example.
  • Another possible reaction is that in the event of a leak, all pumps are switched off in order to keep the damage caused by the leak as low as possible.
  • staggered reactions For example, an optical or acoustic leakage warning can first be issued if the measured outlet pressure falls below the minimum pressure for a predetermined period of time. If the drop below the specified minimum pressure continues for a longer period of time, the monitoring unit can react by switching off all pumps.
  • the monitoring unit can respond to the request for an increased pump output of the entire pump arrangement by switching on an additional pump.
  • the pumping power of the individual pumps is first increased in order to satisfy the requirement for an increased pumping power.
  • increasing the pumping power of the individual pumps comes up against design-related limits with regard to the pumping speed.
  • the pistons in a piston pump should not generally exceed a specific maximum stroke speed.
  • the individual pumps are therefore each assigned a speed sensor which measures the pump speed of the respective pumps. The monitoring unit then interrogates the individual speed sensors and thereby determines the pump speeds of the individual pumps.
  • the monitoring unit finds that the measured pump speed exceeds a predetermined first maximum value for at least one pump, the monitoring unit switches on an additional pump since the pumps that are switched on are not sufficient to provide the pump power required by the consumer.
  • the monitoring unit can switch off the relevant pump. Switching off individual pumps serves to avoid damage to the respective pumps, while switching on individual pumps serves to increase the pump capacity of the entire pump arrangement.
  • the monitoring unit is a Can issue a warning if the pump speed exceeds a predetermined maximum value for at least one pump.
  • both reactions switching off the pump and issuing a warning message
  • a first aspect of the invention has been described above, which provides a monitoring unit which switches the pumps on and off unsimultaneously, which was previously not possible with the conventional pump arrangements.
  • the invention provides a control device to individually control a fluid variable (e.g. coating medium pressure) at the outlet of the individual pumps.
  • a fluid variable e.g. coating medium pressure
  • the control device is a closed-loop control device, i.e. with a feedback loop.
  • the control device is a control device that individually regulates a fluid variable (eg coating medium pressure) at the outlet of the individual pumps, the control device regulating the controlled fluid variables at the outlet of the individual pumps to a common target value.
  • a fluid variable eg coating medium pressure
  • This individual control of the fluid variables (e.g. coating medium pressure) at the outlet of the individual pumps significantly improves the way the individual pumps work together. In addition, this also prevents that individual pumps do not start when switched on, as can happen with the conventional pump arrangements described above.
  • the control device for each individual pump has a measuring element, with the measuring element measuring an actual value of the controlled fluid variable (e.g. coating medium pressure) at the outlet of the individual pumps.
  • a pressure sensor can be arranged downstream behind the individual pumps, which measures the outlet pressure of the respective pump.
  • control device preferably includes an actuator for each individual pump, with the actuator controlling the individual pumps with a variable manipulated variable in order to adjust the actual value of the controlled fluid variable to the specified setpoint value.
  • the actuator can be a continuous valve (eg a proportional valve), for example, which controls the pneumatically driven pump with an adjustable compressed air flow in order to adjust the pump output within the framework of the control.
  • the continuous valve eg a proportional valve
  • the use of a continuous valve (eg proportional valve) as an actuator for controlling the pneumatic pump is advantageous because the pump performance of the respective pump can be continuously adjusted by continuously (constantly) changing the compressed air flow.
  • the controller records several measured variables (e.g. coating agent pressures at the outlet of the individual pumps) and outputs several manipulated variables (e.g. control signals for the individual proportional valves) to the actuators of the individual pumps.
  • the control device preferably has a controller which is connected on the input side to the measuring elements of the individual pumps and receives the measured actual values of the controlled fluid variables (e.g. outlet pressure) at the individual pumps from the measuring elements.
  • the controller On the output side, the controller is connected to the individual actuators (e.g. proportional valves) of the individual pumps and controls these actuators with a variable manipulated variable, whereby the manipulated variable depends on a target/actual deviation between a specified target value and the measured actual value.
  • the controller is therefore responsible for all pumps and enables individual recording of the controlled variable (e.g. outlet pressure) and individual control of the individual pumps.
  • figure 1 shows a pump arrangement 1, which is used in a paint shop for painting motor vehicle body components, in order to pump a sealant (e.g. PVC: polyvinyl chloride) to a number of application robots, which are not shown in the drawing, and to pump the sealant onto seams (e.g. flanged seams, weld seams). apply to the vehicle body components to be painted, which is known per se from the prior art.
  • a sealant e.g. PVC: polyvinyl chloride
  • seams e.g. flanged seams, weld seams
  • a material supply room which is also referred to as "PVC room”.
  • PVC room a material supply room
  • the area within the dot-dash line is in the vicinity of the painting line or the painting booth, but still outside the painting line or the painting booth.
  • the pump arrangement 1 draws the sealant from the material supply space via a feed line 2 .
  • the outgoing line 2 opens into an input line 3, which supplies several pumps 4.1-4.7 connected in parallel with sealant.
  • a return line 5 also branches off from the common input line 3 of the pumps 4.1-4.7 in order to enable material circulation between the material supply space and the pump arrangement 1, which is also known per se from the prior art.
  • the pumps 4.1-4.7 are connected on the output side via a check valve 6.1-6.7 to a common output line 7, i.e. the pumps 4.1-4.7 draw the sealant from the common input line 3 and pump the sealant into the common output line 7.
  • the two feed lines 8, 9 feed the application robots on opposite sides of the painting line.
  • the feed line 8 thus supplies the application robots on one side of the painting line, while the feed line 9 supplies the application robots on the other side of the painting line.
  • the individual pumps 4.1-4.7 are each driven pneumatically.
  • the pumps 4.1-4.7 are each connected to a compressed air supply 13 via a 2/2-way solenoid valve 10.1-10.7 and each proportional valve 11.1-11.7 via a common 2/2-way solenoid valve 12 .
  • the 2/2-way solenoid valve 12 can release or block the compressed air for all of the pumps 4.1-4.7. This makes possible a joint activation or deactivation of the pumps 4.1-4.7 by the 2/2-way solenoid valve 12.
  • the individual pumps 4.1-4.7 can also be switched on or off individually by opening or closing the respective 2/2-way solenoid valve 10.1-10.7.
  • the pump capacity of the individual pumps 4.1-4.7 can also be set individually, specifically via a suitable control of the individual proportional valves 11.1-11.7.
  • a pressure sensor 14.1-14.7 is arranged downstream behind each of the pumps 4.1-4.7, with the individual pressure sensors 14.1-14.7 each measuring the outlet pressure of the individual pumps 4.1-4.7.
  • each of the pumps 4.1-4.7 is assigned an initiator 15.1-15.7 for stroke monitoring of the individual pumps 4.1-4.7.
  • the initiators 15.1-15.7 allow the pump speeds of the individual pumps 4.1-4.7 to be monitored, as will be described in detail below.
  • the initiators 4.1-4.7 also allow a check to be made as to whether the individual pumps 4.1-4.7 are actually working.
  • a pressure sensor 16 which measures the pressure in the input line 3 is assigned to the common input line 3 of the pumps 4.1-4.7.
  • the common input line 3 of the pumps 4.1-4.7 also has a temperature sensor 17 which measures the temperature of the sealant in the input line 3.
  • a pressure sensor 18 and a temperature sensor 19 are also arranged in the outlet line 7 and measure the pressure or temperature of the sealant in the outlet line 7 .
  • the pump arrangement 1 also includes a return line 21 and two pneumatically driven shut-off valves 22, 23.
  • the shut-off valve 22 is closed during production and open during circulation operation.
  • the shut-off valve 23 is open during production and closed during circulation operation.
  • the production operation is an operating state in which the connected application robots request sealant, i.e. in normal coating operation.
  • Circulation mode is an operating state in which the connected application robots do not request any sealant, for example during overnight or weekend breaks or during maintenance breaks.
  • FIG. 2 shows a schematic representation of the above-described and in figure 1 shown pump assembly 1.
  • a control device 24 is also shown here, which contains a control device and a monitoring unit.
  • control device 24 is connected to the pressure sensors 14.1-14.2 in order to measure the pressure upstream behind the individual pumps 4.1-4.7, which enables the outlet pressure of the individual pumps 4.1-4.7 to be regulated, as will be described in detail later.
  • control device 24 is connected on the input side to the temperature sensor 17, the pressure sensor 16, the pressure sensor 18 and the temperature sensor 20 in order to be able to take the measured values of these sensors into account when checking the pump arrangement 1 .
  • control device 24 On the output side, the control device 24 is connected to the two shut-off fittings 22, 23 and to the 2/2-way solenoid valve 12 in order to control the operation of the pump arrangement 1, as will be described in detail below.
  • control device 24 is connected on the output side to the proportional valves 11.1-11.7 in order to be able to control the individual pumps 4.1-4.7 individually as part of the regulation.
  • control device 24 is also connected on the output side to the 2/2-way solenoid valves 10.1-10.7 of the individual pumps 4.1-4.7 in order to be able to switch the individual pumps 4.1-4.7 on and off individually, as will also be described in detail.
  • the control device 24 contains a regulator in order to regulate the outlet pressure of the individual pumps 4.1-4.7.
  • the control device 24 detects actual values of the outlet pressure of the individual pumps 4.1-4.7 via the pressure sensors 14.1-14.2 and compares the measured actual values with a predetermined, uniform target value for the pressure. From this, the control device 24 calculates a target/actual deviation between the target value and the actual value of the individual pumps 4.1-4.7. Depending on this target/actual deviation, the control device 24 then controls the individual proportional valves 11.1-11.7 individually with a control signal, to regulate the actual value of the outlet pressure of the individual pumps 4.1-4.7 individually for each of the pumps 4.1-4.7 to the desired value.
  • control device 24 can switch the individual pumps 4.1-4.7 on or off individually, as has already been briefly mentioned above. This can be done as part of the in figure 3 operating method shown in the form of a flow chart can be used to switch on the individual pumps 4.1-4.7 cyclically, as will be described below.
  • a first step S1 the operator of the pump arrangement 1 enters a number n of pumps for the start of operation.
  • the number n of pumps required also depends on the power requirements of the connected application robots.
  • a step S2 the operator of the pump arrangement 1 then enters a cycle time T for changing the switched-on pumps 4.1-4.7.
  • step S3 all pumps 4.1-4.7 are then switched on for a short time in order to move the coating material in the branch lines to the individual application robots.
  • n pumps are then selected for the start of operation.
  • n the number of pumps 4.1-4.4 can be selected.
  • n pumps are then switched on, while the remaining pumps remain switched off.
  • n 4
  • the pumps 4.1-4.4 can then be switched on, while the Pumps 4.5-4.7 remain switched off.
  • a continuous check is then carried out to determine whether the specified cycle time T has expired.
  • pumps 4.2-4.5 can then be selected for the following switching on, whereas pumps 4.1 and 4.6, 4.7 should remain switched off.
  • step S5 there is a transition to step S5, in which the selected pumps are switched on or off.
  • control device 24 enables an operating method that figure 4 is shown in simplified form in the form of a flow chart and is described below.
  • a step S1 the lifting speed v HUB1 , . . . , v HUB7 of all pumps 4.1-4.7 is first measured. This measurement can take place, for example, using the initiators 15.1-15.7.
  • step S2 the highest lifting speed v MAX of all pumps 4.1-4.7 is then measured.
  • step S3 it is then checked whether this maximum lifting speed v MAX exceeds a predetermined maximum value v MAX1 .
  • an additional pump 4.1-4.7 is switched on in a step S4 in order to lower the lifting speed v MAX below the specified maximum value v MAX1 .
  • a step S5 it is then checked whether the greatest pump speed v MAX exceeds a predetermined second maximum value v MAX2 .
  • step S6 the pump whose lifting speed v MAX exceeds the specified maximum value v MAX2 is switched off and a warning message is output.
  • This speed monitoring and optional connection of additional pumps is intended to prevent the pump speed from exceeding the limit values specified as part of the control.
  • control device 24 enables an operating method that figure 5 is shown schematically in the form of a flow chart and enables leakage detection.
  • a pressure p in the outlet line 7 is then measured, which can be done by means of the pressure sensor 20.
  • a step S3 the measured pressure p is then compared with a predetermined minimum value p MIN .
  • a step S4 checks whether the current value t of the timer exceeds a specified time value T . If this is not the case, then the control device 24 tries to raise the pressure that is too low by switching on an additional pump 4.1-4.7 in a step S6. In a step S7, the pump reaction is then awaited, whereupon the pressure p is measured again in a step S2.
  • step S4 it is checked whether the pressure has fallen below the specified time period T.
  • step S5 all pumps 4.1-4.7 are then switched off, if necessary, and a leakage warning is given.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Coating Apparatus (AREA)
  • Nozzles (AREA)
EP16700526.3A 2015-01-23 2016-01-08 Pumpenanordnung und entsprechendes betriebsverfahren Active EP3247503B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015000869.2A DE102015000869B4 (de) 2015-01-23 2015-01-23 Pumpenanordnung und entsprechendes Betriebsverfahren
PCT/EP2016/000045 WO2016116258A1 (de) 2015-01-23 2016-01-08 Pumpenanordnung und entsprechendes betriebsverfahren

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EP3247503A1 EP3247503A1 (de) 2017-11-29
EP3247503B1 true EP3247503B1 (de) 2023-04-26

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EP (1) EP3247503B1 (pl)
KR (1) KR102436231B1 (pl)
CN (1) CN107208616B (pl)
DE (1) DE102015000869B4 (pl)
HU (1) HUE062545T2 (pl)
MX (1) MX2017009483A (pl)
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EP3856420B1 (en) * 2018-09-24 2023-07-05 Graco Minnesota Inc. Paint sprayer distribution control and output volume monitoring architectures
US11073150B2 (en) * 2018-12-12 2021-07-27 Haines Fire & Risk Consulting Method, system, and apparatus for testing pumps
JP7274356B2 (ja) * 2019-06-11 2023-05-16 東京エレクトロン株式会社 液処理装置、液処理方法及び記憶媒体
JP7356283B2 (ja) * 2019-07-30 2023-10-04 三菱重工業株式会社 流体供給システム及び流体供給方法
KR102177911B1 (ko) * 2019-11-27 2020-11-12 주식회사 레티그리드 시설물의 설비제어시스템 제어 동작에 대한 에너지 효율화 ROI(Return of Investment) 실시간 평가 방법
US20210388830A1 (en) * 2020-06-12 2021-12-16 Deere & Company Demand based hydraulic pump control system
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CN107208616A (zh) 2017-09-26
DE102015000869A1 (de) 2016-09-01
PL3247503T3 (pl) 2023-08-07
US20180003170A1 (en) 2018-01-04
WO2016116258A1 (de) 2016-07-28
US10975858B2 (en) 2021-04-13
KR20170106339A (ko) 2017-09-20
EP3247503A1 (de) 2017-11-29
KR102436231B1 (ko) 2022-08-25
DE102015000869B4 (de) 2019-10-24
HUE062545T2 (hu) 2023-11-28
CN107208616B (zh) 2020-05-29
MX2017009483A (es) 2017-11-15

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