EP1906013A2 - Pompe de dosage, dispositif de pulvérisation pour la pulvérisation de moyens de pulvérisation tout comme procédé de fonctionnement d'un tel dispositif de pulvérisation - Google Patents

Pompe de dosage, dispositif de pulvérisation pour la pulvérisation de moyens de pulvérisation tout comme procédé de fonctionnement d'un tel dispositif de pulvérisation Download PDF

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Publication number
EP1906013A2
EP1906013A2 EP07018175A EP07018175A EP1906013A2 EP 1906013 A2 EP1906013 A2 EP 1906013A2 EP 07018175 A EP07018175 A EP 07018175A EP 07018175 A EP07018175 A EP 07018175A EP 1906013 A2 EP1906013 A2 EP 1906013A2
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EP
European Patent Office
Prior art keywords
metering pump
valve
line
spray
active ingredient
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.)
Withdrawn
Application number
EP07018175A
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German (de)
English (en)
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EP1906013A3 (fr
Inventor
Wolf-Dieter Wichmann
Frank Gessler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lechler GmbH
Original Assignee
Lechler GmbH
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Filing date
Publication date
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Application filed by Lechler GmbH filed Critical Lechler GmbH
Publication of EP1906013A2 publication Critical patent/EP1906013A2/fr
Publication of EP1906013A3 publication Critical patent/EP1906013A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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

Definitions

  • the invention relates to a metering pump, in particular for a spraying device for spraying spraying agents in agriculture, with at least one delivery chamber having at least one liquid inlet and at least one liquid outlet.
  • the at least one liquid inlet and / or the at least one liquid outlet can be closed with a valve.
  • the invention also relates to a spraying device for spraying sprays in agriculture with at least one metering pump. Furthermore, the invention relates to a method for operating such a spray device.
  • the object of the invention is therefore to provide a metering pump, a spray device with at least one metering pump and a method for To operate to provide such a spray device, which are improved in terms of handling in operation, in preparation for operation and cleaning.
  • a metering pump in particular for a spraying device for spraying sprays in agriculture, with at least one delivery chamber having at least one liquid inlet and at least one liquid outlet.
  • the at least one liquid inlet and / or the at least one liquid outlet can be closed with a valve.
  • the at least one valve is designed to be self-locking unlockable by means of an unlocking device.
  • the metering pump in two directions with little resistance and can also be flowed through outside a normal production operation. These directions are on the one hand from the liquid inlet to the liquid outlet and on the other hand, then in the unlocked state, from the liquid outlet to the liquid inlet of the metering pump.
  • the flow essentially relates to the delivery chamber of the metering pump and the unlockability of the check valves of the metering pump, there are numerous possibilities that greatly facilitate the operation of the metering pump or a spray device provided therewith.
  • both an intake valve and an exhaust valve are self-locking but unlocked formed.
  • the invention can be unlocked the valves of a metering pump but also allows the flow through an entire pipeline system from the reservoir of the spray to the place of injection of the spray, and that outside the normal production operation.
  • the required switching and control elements must be provided only at appropriate locations in the system. The operation of the metering pump according to the invention or a spray device provided therewith is thus much safer to handle.
  • the entire metering system can be filled from the reservoir of the spray to the place of injection with spray by means of pneumatic underpressure before starting the dosing while the metering pump is vented ,
  • This has the advantage that at the beginning of dosing the spray is fed immediately and without delay.
  • the advantage is achieved that after completion of the dosage, the spray contained in the entire system can be fed back, for example by means of compressed air in the reservoir. This represents a major advance in that there is no longer any undiluted residual amount of pure spray that can not be applied to the previously treated area.
  • the metering pump can be located together with the reservoir for the spray at any suitable location of the spray device. This is completely independent of the location of the feed of the spray, without this spatial separation of metering pump and feed has a delay in the dosage or the concentration structure. Since the valves of the metering pump can thus be unlocked, by means of the metering pump in addition to the metered addition of spraying agents into a carrier liquid, the prefeeding from an active ingredient storage tank and the return conveyance of the spraying agent into an active ingredient storage tank or the like can take place. Also, a flushing of the delivery chamber of the metering pump is possible in this way.
  • any liquid including emulsions and suspensions or the like is considered, which in turn include the spray.
  • carrier liquid which is also a fluid
  • water is generally used.
  • Sprays and active ingredient used are used. Although a spray is generally a mixture of a carrier liquid with an active ingredient, both terms are used synonymously in this specification, and both terms can be equivalently used in the invention.
  • the delivery chamber of the metering pump is connected both to the at least one liquid inlet and to the at least one liquid outlet.
  • a self-locking valve is here called a valve having a passage direction and a reverse direction.
  • a passage function is achieved in a valve according to the invention, in which the unlocking device is not activated, preferably by means of a suction or pressure effect generated by the metering pump.
  • a blocking function is achieved in accordance with the same valve with a pressure or suction generated by the metering pump. The blocking function can also be supported by an additional force on the blocking valve body of the valve or generated exclusively by this force effect.
  • each liquid inlet and each liquid outlet can be closed with a valve.
  • each liquid inlet and each liquid outlet can each be closed by means of a separate valve.
  • the valve in the liquid inlet is designed as a suction valve and the valve in the liquid outlet as a pressure valve.
  • Each of the valves can be controlled separately for unlocking.
  • the valve has a valve body which is permanently subjected to force.
  • the valve body is preferably subjected to force by means of a closing spring.
  • the valve body may be formed, for example, as a ball, cylinder, plate or the like, which may be arranged on a plunger or acted upon by a Entsperrst Congressel.
  • the valve body seals against a suitably shaped valve seat in the valve housing.
  • the permanent application of force to the valve body is preferably carried out by means of spring force and / or gravity and is provided in particular for the self-locking function of the valve, for example in the manner of a check valve.
  • the unlocking device is pneumatically, hydraulically and / or electrically activated.
  • the metering pumps according to the invention is a spraying device in agriculture or plant protection technology and tractors are generally used as carrier vehicles which already have hydraulic and / or pneumatic systems for other applications, there is no need for activation by means of pneumatics or hydraulics of the unlocking device Drive means are provided. If an electrically activatable unlocking device is provided, this can be realized for example with a servomotor or an electromagnet.
  • the unlocking device acts on the valve body of the valve, in particular by means of a plunger on the valve body.
  • the action of the unlocking device on the valve body can be effected with a piston, plunger and / or magnet, wherein the unlocking device acts in particular in a direction which acts parallel to the direction of movement of the valve body but against the force for the self-locking function.
  • the unlocking can for example also be effected by means of a magnetic field in which the valve body and / or an unlocking ram is moved as in a linear motor.
  • the unlocking device has a return device.
  • the return device is in the preferred embodiment of the invention, a return spring which acts on a plunger.
  • a magnet and / or a spring may be provided for the return of the unlocking.
  • the resetting can also take place in that the activation device of the unlocking device is deactivated and the delivery pressure of the metering pump is reduced, so that the self-locking properties of the valve are sufficient to reset the unlocking device.
  • the object underlying the invention is also achieved by a spraying device for spraying sprays in agriculture, in particular a field sprayer, with at least one metering pump according to the invention.
  • the spray device comprises at least one group of spray nozzles, each having an inlet connected to each other by a common feed channel, the metering pump delivering spray into the inlet immediately upstream of the spray nozzle into the inlet or immediately upstream of the group of spray nozzles.
  • Each of the spraying nozzle or group of spray nozzles provided in the spraying device is in each case assigned at least one separate metering pump.
  • the metering pump and the spray nozzles are arranged in or on a common housing.
  • the metering pump and the spray nozzles thus form a module which can be arranged as a unit, for example on a spray bar of the spray device.
  • the metering pump can be attached to a nozzle holder.
  • the at least one metering pump is connected by means of a spray medium supply line with a drug reservoir and the at least one metering pump is connectable to a compressed air line and / or a carrier liquid line.
  • the at least one metering pump can be arranged in a ring line which has at least one spray agent feed line from an active ingredient storage tank to the metering pump and at least one active substance return line from the metering pump to the active substance storage tank. In this way, a prefeed operation, a return operation and / or a purge mode are possible. By targeted activation of the unlocking of the valves, the conveying direction of the metering pump could even be reversed.
  • a sensor in the region of the mouth of the active ingredient feed line in the carrier liquid line in or at the active ingredient feed line a sensor is provided which detects at least the presence of fluid and outputs a corresponding signal.
  • a sufficient advance can be detected and, for example, based on the sensor signal, a compressed air supply can be switched off.
  • a compound of the active ingredient feed line with the carrier liquid line in the mouth of the active ingredient feed line in the carrier liquid line by means of a valve is shut off, so that only in a conveying operation of the metering pump is a connection between the active ingredient feed line and the carrier liquid line and otherwise the carrier liquid line and the active ingredient feed line are reliably separated.
  • the at least one metering pump can be connected to a compressed air line or a carrier liquid line in order to remove spraying agent at least from the metering pump or to flush the metering pump in a return operation or flushing operation
  • An inventive method for operating a spray device described above comprises the step of unlocking the at least one valve of the metering pump and the Vortexns of spray to the at least one metering pump, the return of spray from the at least one metering pump or the flushing of the at least one metering pump in the unlocked state of the at least one valve.
  • the metering pump 10 shown in FIG. 1 for metering in active ingredients for agricultural spraying equipment has a suction valve 14 in the region of a liquid inlet 12 of the metering pump 10 and a pressure valve 18 in the region of a liquid outlet 16 of the metering pump 10.
  • the liquid inlet 12 and the liquid outlet 16 are each connected to a delivery chamber 20 of the metering pump 10.
  • a piston 22 In the delivery chamber 20, which is cylindrical, a piston 22 is arranged to be linearly movable parallel to a central longitudinal axis of the delivery chamber 20.
  • the piston 22 is connected to a piston rod 24, which is in engagement with a drive, not shown.
  • Valves 14, 18 of the metering pump are shown in a state in which a normal conveying operation is made possible with the metering pump.
  • the valves 14, 18 of the dosing pump are shown in a state in which a rinsing or cleaning process, a prefeed operation or a return operation is possible.
  • Each of the valves 14, 18 has, for example, a spherical valve body 26 which is pressed by means of a coil spring 28 with force in a valve seat 30 to achieve a self-locking of the valves 14, 18 in the manner of a check valve.
  • the valve body 26 separates, when it rests in the valve seat 30, a valve vestibule 32 from a delivery line 34, wherein on the delivery line 34, a Y-piece 35 is connected.
  • an unlocking device 36 act. This has a plunger 38 which is connected to a piston 40.
  • the piston 40 is guided linearly movable in a cylinder 42 and held by means of a coil spring 44 in a Endanschlag too, which is shown in Figure 3. Against the force of the coil spring 44, the piston 40 can be acted upon by a pneumatic or hydraulic line 46 with a compressive force which moves the piston 40 together with the plunger 38 in a direction parallel to the vector 47 of the compressive force and opposite to the pressure force of the spring 44 runs.
  • valves 14, 18 will be explained with reference to valve 18. If the piston 22 of the metering pump 10 in FIG. 1 is moved towards the valve 14, that is to the right in FIG. 1, a pressure is built up in the delivery chamber 20, which acts according to the arrow 48 in FIG. 3 in the valve antechamber 32. Is the pressure or the resulting pressure force on the valve body 26 is greater than the spring force of the coil spring 28, the valve body 26 against the force of the coil spring 28 from the Valve seat 30 lifted and a liquid to be pumped can be pumped from the valve vestibule 32 in the feed line 34. In the opposite movement of the piston 22 in Figure 1 to the left is formed in the valve vestibule 32, a negative pressure, which acts according to arrow 50 in Figure 3.
  • valve body 26 if the pressure and thus the pressure force acting on the valve body 26, for example by a pressure equalization or by the described suction effect, smaller than the spring force of the coil spring 28, the valve body 26 is pressed by the coil spring 26 back into the valve seat 30. A backflow of already promoted spray from the delivery line 34 into the delivery chamber 20 is prevented.
  • the valve 14 operates analogously and prevents the spray contained in the delivery chamber 20 can flow back into the intake passage 12. As a result, fluid is expelled from the delivery chamber 20 through the valve 18 during the movement of the piston 22 to the right. Moves the piston 22 in Figure 1 to the left, fluid is sucked through the valve 14 into the pumping chamber.
  • the piston 40 is pressurized by the pneumatic or hydraulic line 46 with a compressive force. As soon as the pressure force is greater than the forces of the coil springs 28, 40 together, thereby the piston 40, and with this the plunger 38, on the delivery line 34 moves. The valve body 26 is lifted out of the valve seat 30 and the valve 18 is unlocked. Decreases the pneumatic or hydraulic pressure of the hydraulic fluid in the line 46 again below the sum of the forces of the coil springs 28 and 40, the valve body 26, if the piston of the pump performs no pumping movement, pressed by the coil spring 28 back into the valve seat 30 and the Piston 40 brought by the coil spring 44 back into the end stop position, which is shown in Figure 3.
  • the delivery chamber 20 can be flowed through in the unlocked state of the valves 14, 18 both in the conveying direction and in the opposite direction with only a small flow resistance. As a result, a pre-promotion of the drug before the start of injection, a return promotion after injection end and a rinsing process of the metering pump allows.
  • FIG. 4 shows a spray device according to the invention with the components required for the general function, the components required for unlocking the pump valves and the components required for filling before the delivery operation and for emptying after the delivery operation of the metering pump and piping.
  • FIG. 4 shows a spray device 60 according to the invention, in which a prefeed operation, a return operation and a flushing operation are possible.
  • the spray device 60 has a storage tank 61 for carrier liquid, usually water, which is connected via a carrier liquid line 63 with a spray bar 66 with a plurality of spray nozzles.
  • a carrier liquid pump 62 is arranged in the carrier liquid line 63 between storage tank 61 and spray bar 66. For simplicity, the representation of the components for the regulation of the spray pressure applied by the pump 62 has been dispensed with.
  • a Wirkstoffsaug Congress 75 is disposed and between the metering pump 80 and the feed point 65 is a Wirkstoffinspeise réelle 68 is arranged.
  • a suction valve 77 is arranged, which is designed as a check valve and is unlockable by means of an unlocking device 74.
  • an outlet valve 72 Downstream of the metering pump 80, an outlet valve 72 is arranged, which is also unlocked with an unlocking device 73.
  • the unlocking devices 73, 74 are not activated and during a movement of a piston 79 of the metering pump 80, the metering pump 80 thus sucks active substance from the active substance reservoir 76 into its delivery chamber 78 and then conveys this again into the active ingredient feed line 68.
  • a flow meter 87 Downstream of the outlet valve 72, a flow meter 87 is arranged and in turn downstream of the flow meter 87, a constant pressure valve 69 is arranged, which is also unlocked by means of an unlocking device 70.
  • the constant pressure valve 69 is constructed in the manner of a conventional check valve and in the illustration of FIG. 4 only schematically. It is essential that the constant pressure valve 69 has a constant opening pressure, which is independent of the back pressure in the Wirkscherinspeisetechnisch between the constant pressure valve 69 and de feed 65. Thus, as soon as the pressure in the delivery chamber 68 of the metering pump 80 has exceeded a predetermined value, opens the constant pressure valve 69 and Liquid can happen this.
  • a float valve 64 is further arranged.
  • This float valve 64 connects an air line 88 to which an overpressure or a negative pressure can be applied to the active ingredient feed line 68.
  • a float 89 is raised and blocks the connection between the air line 88th and the drug delivery line 68 reliably.
  • a further valve 67 is provided, which can be opened with an unlocking device 90. This further valve 67 is closed at rest and only during the delivery operation of the metering pump 80, this is actively opened by the unlocking 90.
  • a connection can be interrupted from the carrier liquid line 63 to the active ingredient feed line 68 in response to a control signal.
  • connection 82 for pneumatic overpressure and a connection 85 for pneumatic negative pressure is further provided.
  • the means for generating the pneumatic overpressure or pneumatic negative pressure at the terminals 82 and 85 are not shown for clarity.
  • Pneumatic switching valves 81, 83, 84 and 86 serve to distribute the pneumatic overpressure or pneumatic negative pressure to the individual unlocking devices 90, 70, 73 and 74 of the individual valves and to the air line 88.
  • the spraying device 60 to be metered can be conveyed from the active substance reservoir 76 to the feed location 65 in the spraying device 60 according to the invention.
  • the spray from the metering pump 78 and the active ingredient feed line 68 and the WirkstoffzuWORKtechnisch 75 from the feed 65 in the drug reservoir 76 is conveyed back become.
  • pure water can be sucked in from a clean water tank 91 of the spray device, and the metering pump 80 as well as the entire area of the spray device 60 contaminated with spray up to the feed point 65 can be rinsed.
  • valves 81 and 86 are switched to passage.
  • a pneumatic negative pressure is present in the air line 88 and thus at the float valve 64 and the unlocking devices 70, 73, 74 of the constant pressure valve 69, the outlet valve 72 and the suction valve 77 are subjected to pneumatic pressure and these valves 69, 72, 77 thereby enter the unlocked state.
  • the valve 67 is closed and thereby separates the active ingredient feed line 68 from the carrier liquid line 63.
  • the float valve 64 is opened because there is no spray in the active ingredient feed line 68.
  • a sensor 64a shown only schematically in the illustration of FIG. 4 detects the position of the float 89 and switches off the process whenever the float 89 has closed the float valve 64 and in particular switches over the pneumatic valves 81, 83, 84 and 86 , In this way, in a prefeed operation, the spray can be conveyed to near the feed point 65 and at the same time the delivery chamber 78 of the metering pump 80 is vented.
  • the pneumatic valves 81 and 86 are switched to the lock state so that the pneumatic negative pressure at the float valve 64 is turned off and the release of the constant pressure valve 69, the exhaust valve 72 and the suction valve 77 is released.
  • the metering pump 80 can now, according to their intended use, record their conveying operation. If the metering pump 80 is placed in the conveying mode, corresponding to a movement of the piston 79 from left to right and vice versa, the pneumatic valve 83 is switched through simultaneously with the recording of the conveying operation and thus the valve 67 is switched to passage at the entry point 65, so that the passage between the active ingredient feed line 68 and the carrier liquid line 63 is released.
  • the spraying agent contained in the suction line 75, the delivery chamber 78, the flow rate meter 87 and the active substance feed line 68 can be conveyed back into the active substance reservoir 76 in a return operation.
  • the pneumatic valves 81 and 84 are switched to passage. If the metering pump 80 is no longer in the delivery mode, the valve 67 is also closed and thereby separates the active ingredient feed line 68 from the carrier liquid line 63. The float valve 64 is now closed because there is spray in the active ingredient feed line.
  • the pneumatic valve 81 to passage now the constant pressure valve 69, the exhaust valve 72 and the intake valve 77 are unlocked.
  • the inflowing compressed air displaces the spray agent in the active ingredient feed line 68 in the active substance reservoir 76 opposite to the conveying direction in the conveying mode.
  • the unlocked constant pressure valve 69, the flow meter 87, the unlocked outlet valve 72, the delivery chamber 78 of the metering pump 80 and the unlocked intake valve 77 flows through. If the circuit of the pneumatic valves 81 and 84 triggering this return operation is ended, the pneumatic overpressure at the float valve 64 is switched off and the release of the constant-pressure valve 69, the outlet valve 72 and the intake valve 77 is canceled. This can also be done automatically, e.g.
  • the suction line 75 can be connected to the pure water tank 91 and the pure water can then, as described in the prefeed operation, be sucked close to the feed 65.
  • the small, in the suction line 75, the delivery chamber 78 of the metering pump 80, the flow meter 87, the constant pressure valve 69 and the active ingredient feed line 68 still contained spray agent residues can be diluted to an ineffective dose.
  • FIG. 5 shows a spray device 50 according to the invention, more precisely a field sprayer with several part widths on the spray bar and therefore a large working width in which the metering pumps according to the invention are used.
  • the spray device 50 has a ring line. Starting from a drug reservoir 52, the ring line is composed of an active substance feed line 54, which branches into individual secondary lines 56, 58, 60, 62, and a active substance return line 64, in which the secondary lines 56, 58, 60, 62 are brought together again. Through the loop constantly circulates active ingredient, so that this example drug reservoir comes again in the drug reservoir 52.
  • Each of the secondary lines 56, 58, 60, 62 supplies a certain number of metering pumps 10 in the nozzle holders 66, wherein at least one metering pump 10, each having at least one associated spray nozzle in a common housing 68 is arranged on each nozzle holder.
  • a division into several secondary lines 56, 58, 60, 62 is expedient in order to ensure a uniform supply of all nozzle holder metering pumps 10 with active ingredient.
  • a throttle valve 70, 72, 74, 76 is provided in each secondary line 56, 58, 60, 62.
  • the sum of the volume flows through all the throttle valves 70, 72, 74, 76 is preferably about 20% below the average delivery rate of a circulation pump 78, for a fast and uniform distribution of the active ingredient.
  • the division of the ring line shown in Fig. 4 into several parallel subcircles can be done independently of the division of the sub-beams. For smaller boom widths, for example, a division into three secondary circuits is sufficient, due to the folding of a linkage on which the sub-beams are arranged.
  • FIG. 5 Likewise shown in FIG. 5 are the components required for providing the carrier liquid with an injection pressure which is preferably adapted to the travel speed.
  • the carrier liquid preferably pure water
  • the carrier liquid container 80 is conveyed out of the carrier liquid container 80 by means of the carrier liquid pump 82.
  • a pressure control unit 84 in conjunction with a control unit, not shown, for an adapted to the driving speed injection pressure in the subsequent carrier liquid lines 86, which lead to the spray boom.
  • a flow meter 88 is provided, which supplies signals to the control unit, not shown.
  • control unit calculates the required amount of active ingredient to be metered, divides this amount of active ingredient onto the individual nozzle holder metering pumps 10 in operation and converts the determined quantity of active ingredient into drive pulses for the metering pumps 10 in the housings 68.
  • each partial width by means of a section valve 90 is shut off.
  • the section valves 90 are, for example, switched pneumatically and are also controlled by the control unit, not shown.
  • the ring line of the illustrated embodiment is divided according to the division of the sections into secondary lines 56, 58, 60, 62.
  • the active substance storage container 52 is connected to a filling line 92 for filling and to an emptying line 94 for emptying the active ingredient storage container 52, wherein the emptying line 94 is connected to the storage container 52 by means of a four-way valve 96.
  • the four-way valve 96 opens except in the reservoir 52 and in the discharge line 94 still in the spray medium supply line 54 and in a compressed air line 96. According to the position of the four-way valve 96 shown in Figure 4, the active ingredient from the drug reservoir 52 passing the four-way valve 96 and the circulation pump 78 and enter the spray medium supply line 54.
  • the four-way valve 96 can be brought into a position in which it the compressed air line 98 with the active ingredient supply line 54 combines. Now, if devices are provided at the liquid outlets of the metering pumps 10, by means of which the spraying agent flow, which would run in spraying operation in the direction of the spray nozzles, back into the secondary line 56, 58, 60, 62, the spray from the lines 54, 56 , 58, 60, 62, 64 and the metering pumps 10 are blown out.
  • Y pieces can be provided at the liquid outlets of the metering pumps 10, for example, as shown in FIG.
  • One arm of these pieces respectively opens at a spray nozzle or at a group of spray nozzles and the other arm is connected to a compressed air line 100 with a two-way valve 106.
  • the two arms of the Y-pieces are each lockable by means of its own valve.
  • a three-way valve 102 is provided for this alternative, by means of which the active substance return line 64 with the compressed air line 104 is connectable.
  • the three-way valve 102 is adjusted so that the active substance return line 64 is connected to the compressed air line 104 and the two-way valve 106 so set the non-sealed arms of the Y-pieces are connected to the compressed air line 100, the remaining spray from the line 64, the metering pumps 10, the secondary lines 56, 58, 60, 62 and the active ingredient supply line 54 is conveyed back into the fuel supply reservoir 52 ,
  • the embodiment of the metering pumps 10 with the two self-locking, but unlockable valves advantageous because with the valves unlocked and the pumping chamber can be emptied.
  • FIG. 6 shows a further preferred embodiment of a metering pump according to the invention with self-locking and unlockable valves.
  • the metering pump 110 is also provided for metering active ingredients in a field sprayer and has a total of four self-locking and unlockable valves 112, 114, 116 and 118 of the type, as already described.
  • the valves 112, 118 are assigned to a first delivery chamber 120 and the valves 114, 116 to a second delivery chamber 122.
  • the first delivery chamber 120 is bounded by a first piston 124 and the second delivery chamber 122 is bounded by a second piston 126.
  • the two pistons 124, 126 are driven together in a manner not shown.
  • this can take place via a piston rod connecting the pistons, which in each case moves the two connected pistons 124, 126 in the same direction in the directions of the double arrow 128.
  • the two pistons 124, 126 can also be hydraulically driven, for example, so that they would then move in opposite directions.
  • the pistons 124, 126 are moved in the same direction.
  • the piston 124 moves upward and pushes liquid out of the delivery space 120, liquid is simultaneously sucked into the delivery space 122.
  • the peculiarity of the metering pump 110 is the combination of two delivery chambers 120, 122 and thus in principle the combination of two pumps.
  • the piston 124, the delivery chamber 120 and the valves 112, 118 on the one hand and the piston 126, the delivery chamber 122 and the valves 114, 116 each represent independent pumps.
  • the valve 118 forms an intake valve and the valve 112 an exhaust valve for the delivery chamber 120.
  • the valve 116 forms an intake valve and the valve 114 an exhaust valve for the delivery chamber 122. All valves are unlocked according to the invention ,
  • the two intake valves 118, 116 are fed from a common intake passage 130.
  • the two outlet valves 112, 114 convey into a common pressure line 132.
  • valves 112, 114, 116, 118 function as self-locking valves and are thus not in the unlocked state, a precisely defined delivery volume will become apparent with each movement of the pistons 124, 126 sucked the common intake passage 130 and then ejected in the associated counter-movement in the common rail 132 pressure. If, as shown in the illustration of FIG.
  • the intake valve 116 is unlocked by means of the associated unlocking device, the delivery volume of the metering pump 110 can be halved, since in the unlocked state of the intake valve 116 liquid is indeed sucked from the common intake line 130, When the piston is moved back, however, the liquid is forced back into the suction line 130, since sufficient pressure can not be built up in the delivery chamber 122 to lift the valve body of the outlet valve 114 away from its valve seat.
  • the suction and pushing back of fluid into and out of the delivery chamber 122 in the unlocked state of the intake valve 116 is indicated by a double arrow 136.
  • the delivery rate of the metering pump 110 can thereby be halved. As a result, even larger areas of active ingredients to be dosed can be covered.

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EP07018175A 2006-09-19 2007-09-17 Pompe de dosage, dispositif de pulvérisation pour la pulvérisation de moyens de pulvérisation tout comme procédé de fonctionnement d'un tel dispositif de pulvérisation Withdrawn EP1906013A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006045450A DE102006045450B4 (de) 2006-09-19 2006-09-19 Spritzvorrichtung zum Versprühen von Spritzmitteln sowie Verfahren zum Betreiben einer solchen Spritzvorrichtung

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EP1906013A2 true EP1906013A2 (fr) 2008-04-02
EP1906013A3 EP1906013A3 (fr) 2010-11-10

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EP07018175A Withdrawn EP1906013A3 (fr) 2006-09-19 2007-09-17 Pompe de dosage, dispositif de pulvérisation pour la pulvérisation de moyens de pulvérisation tout comme procédé de fonctionnement d'un tel dispositif de pulvérisation

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EP2611289B1 (fr) 2010-08-31 2016-01-06 Exel Industries Ensemble de pulvérisation et pulvérisateur équipé d'au moins un tel ensemble
AT14837U1 (de) * 2015-07-02 2016-07-15 Mayrhofer Alexander Vorrichtung zur abgabe zweier flüssigkeiten
EP3332639A1 (fr) * 2016-12-08 2018-06-13 HORSCH LEEB Application Systems GmbH Pulvérisateur agricole
DE102017220024A1 (de) * 2017-11-10 2019-05-16 Robert Bosch Gmbh Verfahren zum Überwachen und/oder Steuern eines Bereitstellungsvorgangs einer Spritzflüssigkeit an einer Spritzdüseneinheit

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WO2011059824A2 (fr) 2009-10-29 2011-05-19 Medtronic, Inc. Méthodes et matériels pour des régimes thérapeutiques contre l'hépatite c optimisés
CN104053357B (zh) 2011-12-14 2016-01-20 巴斯夫欧洲公司 分配液体混合物的系统和方法
CN105173890B (zh) * 2015-07-31 2018-04-24 中国矿业大学 一种卷盘式喷灌机卷盘换向自锁装置
DE102017126350A1 (de) 2017-11-10 2019-05-16 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Wirkstoffversorgungssystem für ein landwirtschaftliches Spritzgerät
DE102018102586A1 (de) 2018-02-06 2019-08-08 Amazonen-Werke H. Dreyer Gmbh & Co. Kg Verfahren zum Ausbringen einer Spritzflüssigkeit
CN111149777B (zh) * 2020-03-09 2024-09-17 北京弘控生态环境有限公司 黑水虻养殖和卸料自动化系统
EP4178724B1 (fr) * 2020-07-10 2025-11-19 Board of Trustees of Michigan State University Ensemble soupape pour pulvérisation agricole, appareil associé, systèmes associés et méthodes associées
CN114467607B (zh) * 2022-02-08 2023-01-24 新疆维吾尔自治区阿克苏地区林业和草原局 干旱区超大图文模型绿化种植方法
FR3140558B1 (fr) * 2022-10-11 2025-10-24 Exel Ind Ensemble de pulvérisation à injection directe comprenant une interface de dosage direct

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2611289B1 (fr) 2010-08-31 2016-01-06 Exel Industries Ensemble de pulvérisation et pulvérisateur équipé d'au moins un tel ensemble
US11779006B2 (en) 2010-08-31 2023-10-10 Exel Industries Spraying assembly, and sprayer equipped with at least one such assembly
AT14837U1 (de) * 2015-07-02 2016-07-15 Mayrhofer Alexander Vorrichtung zur abgabe zweier flüssigkeiten
EP3332639A1 (fr) * 2016-12-08 2018-06-13 HORSCH LEEB Application Systems GmbH Pulvérisateur agricole
DE102017220024A1 (de) * 2017-11-10 2019-05-16 Robert Bosch Gmbh Verfahren zum Überwachen und/oder Steuern eines Bereitstellungsvorgangs einer Spritzflüssigkeit an einer Spritzdüseneinheit

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DE102006045450B4 (de) 2008-07-10
DE102006045450A1 (de) 2008-03-27
EP1906013A3 (fr) 2010-11-10
US20080078843A1 (en) 2008-04-03

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