EP2114134A1

EP2114134A1 - Spraying device for delivering liquids

Info

Publication number: EP2114134A1
Application number: EP07857132A
Authority: EP
Inventors: Volker Ehlen
Original assignee: Amazonen Werke H Dreyer SE and Co KG
Current assignee: Amazonen Werke H Dreyer SE and Co KG
Priority date: 2007-02-03
Filing date: 2007-12-27
Publication date: 2009-11-11
Also published as: WO2008095527A1; EA200970715A1

Abstract

Spraying device for delivering liquids, in particular for agricultural purposes, comprising a spraying beam arrangement that is assigned to a vehicle and has at least one liquid line (14) running transversely in relation to the travelling direction and provided at intervals with spray nozzles (19), wherein at least one liquid to be to delivered, respectively coming from at least one metering pump (29) which supplies the carrier liquid from a liquid tank (28) and produces the spraying pressure and from at least one pump (38) which supplies at least one active agent and feeds it into the carrier liquid in a metering manner, can be fed to the spray nozzles in an adjustable amount by means of the at least one liquid line, characterized in that a pre-mixing container (32) for pre-diluting and/or dissolving the at least one active agent with and/or in diluting liquid before delivery of the liquids is provided, and in that the pre-mixing container is connected by means of at least one line (37) to the metering pump (38), which at least before the delivery of the liquids feeds a pre-diluted active agent into the carrier liquid.

Description

Spraying device for dispensing liquids

The invention relates to an injection device for dispensing liquids according to the preamble of claim 1.

Such a spray device is known for example from DE 10 2004 047 585 A1. This spraying device has an active ingredient reservoir and a drug reservoir. In the drug reservoir is concentrated liquid pesticide. From the active substance storage container, the liquid active substance located in the active substance storage container can be fed to the active ingredient supply container via a discharge line. From the drug reservoir, the concentrated drug in the vicinity of the dispensing nozzles is fed into the carrier liquid.

In one embodiment according to this document, prediluted active substance can also be introduced into the active substance preliminary container. For this purpose, a predilution pump is provided, which sucks an exactly defined amount of active substance and carrier liquid per pressure pulse and fills it with the active ingredient reservoir in dilute liquid during the dispensing process.

This type of pre-dilution of the concentrated active ingredient is relatively expensive and therefore expensive due to the predilution pump and during the predilution during the dispensing process.

In practice, further injection devices are known, in which prior to application of the active ingredient, the active ingredient is fed via a so-called. Inspülbehälter in the spray tank in vorverdünnter way the liquid in the liquid tank, so the spray mixture of mixed together carrier liquid and active agent it is necessary to mix in the spray agent tank per volume of spray agent tank.

Furthermore, it is known in practice to feed the active ingredient in the so-called direct feed process undiluted only directly into the carrier liquid, similar to that described in DE 10 2004 047 585 A1. The invention has for its object to improve the known injection device for dispensing liquids or the method for using an injection device to the effect that with simple means a trouble-free dosing of the active agent only immediately before application in the carrier liquid outside the liquid tank in the carrier liquid.

This object is achieved by the characterizing features of claim 1. As a result of these measures, the active agent agent is prediluted in a separate operation prior to the application of the liquid on agricultural land in the premixer and then the prediluted drug agent is fed into the carrier liquid through the metering pump. Thus, only pre-diluted active agent agent is fed into the carrier liquid, so that only very little carrier liquid is contaminated.

An advantageous feed of the prediluted active agent into the carrier liquid and thorough mixing of the prediluted active agent with the carrier liquid is achieved in that a mixing device is arranged between the feed point of the prediluted active agent in the carrier liquid line and the spray nozzles of the spray bar assembly in the carrier liquid line.

An advantageous embodiment of the spraying device for prediluting the active agent can be achieved in that the premix container has at least such a volume that sufficient vorverdünntes drug agent from the premix container tuned to the sufficient supply of prediluted drug in the liquid tank located in the carrier liquid carrier liquid to the maximum capacity of carrier liquid the liquid tank is receivable.

An advantageous dimensioning of the premix container can be ensured by the fact that the capacity of the premix container max. 1/10 volume of the liquid tank or at least 100 l.

In one embodiment of the invention, it is provided that the metering line, which is arranged between the premix container and the carrier liquid line, in which the metering pump is arranged, as seen in the flow direction behind the arranged in the carrier liquid line pump opens into the carrier liquid line.

In another embodiment, it is provided that the metering line, which is arranged between the premix container and the carrier liquid line and in which the metering pump is arranged, opens into the carrier liquid line, viewed in the flow direction, before the pump arranged in the carrier liquid line.

As a result of this measure, a simpler designed metering pump can be used, which feeds the prediluted active agent in the region of the carrier liquid line, in which the carrier liquid located in the line is not yet pressurized, but is in the intake state. Thus, it is therefore not necessary that the metering pump must feed the prediluted active agent against an increased pressure of the carrier liquid line.

In order to ensure adequate mixing of the prediluted active ingredient applied in the premix container during mixing and during application of the active agent, it is provided that a mixing device is assigned to the premix container.

A simple implementation of a method for dispensing the liquids with the spray device described above is achieved by prediluting and / or dissolving the active ingredient with a diluent liquid in a separate operation before applying the liquid to agricultural surfaces in the premix container such that at least as much active agent vorverdünnt in the premix tank in this operation and dissolved, sufficient for at least for application with a carrier liquid amount that can accommodate the carrier liquid tank maximum, and that during the injection process via the metering the at least one prediluted and / or dissolved active ingredient in the carrier liquid line in metered Way fed and in the mixing chamber, the at least one prediluted drug agent is uniformly mixed with the carrier liquid.

Among other things, the following advantages are achieved by the invention in a simple manner: it is possible for the active agent agent to be mixed in a prediluted manner for one or more fillings of the liquid tank - Larger amounts of spray can be carried for several liquid tank fillings of carrier liquid

Mixing of the prediluted active substance liquid can be carried out separately from the filling of the liquid tank with carrier liquid

- The spray system according to the invention is salaried entrepreneur and Großbetriebefreundlich

- It can also be dissolved and prediluted powder and granules

- In the reservoir, there is only water as the carrier liquid, so that the reservoir in its shape are arbitrarily, without consideration for the best possible configuration with respect to the stirring of liquid located in the liquid tank, designed as a stirring of the carrier liquid located in the liquid tank which is usually water is not required

- The legally required fresh water tank is also eliminated, because fresh water is in the liquid tank as the carrier liquid

- Since no more stirring a large broth volume is required, a pump for discharging the liquid can be used with lower pump power

- Especially for contractors, it is advantageous that in the premix container only as much drug is prediluted, as he needed for the auszubringende area. Many customers can be operated individually with a carrier liquid filling the liquid tank, it must only be diluted in each case the required amount of active ingredient, which is then fed to the carrier liquid located in the liquid tank usually water directly from the application of the carrier liquid.

These entire advantages can be achieved in a cost effective and much simpler manner without the direct feed in the classical method in this inventive new method, because simple metering pumps and fewer components are required.

Further details of the invention can be taken from the example description and the drawings. Show here

1 shows a liquid plan of a conventional conventional syringe during the flushing of a granulated or liquid active ingredient via the dispenser container in the liquid tank for applying the spray mixture in a schematic representation, according to the prior art,

1 but with the complete mixing of the active ingredient with the carrier liquid to a homogeneous spray mixture in the liquid tank,

3 shows the liquid plan according to FIG. 1, but in the situation of discharging the spray mixture onto the target surface, FIG.

4 shows the liquid plan in a direct feed during the injection process in a schematic and simplified representation according to the prior art,

5 is a schematic and simplified illustration of the liquid plan for the injection device according to the invention during premixing and predilution of a granulated or liquid active agent on the premix vessel.

6 shows the liquid plan of the injection device according to the invention during the injection process in a schematic and simplified representation,

7 shows a further liquid plan for the injection device according to the invention during premixing and predilution of a granulated or liquid active agent on the premix vessel in a schematic and simplified representation and

Fig. 8 shows the liquid plan of the injection device according to the invention according to FIG. 7 during the injection process in a schematic and simplified representation.

The injection device according to the liquid plans according to FIGS. 1-3 according to the prior art comprises a liquid tank 1 for holding spray liquid, a pump 2 which pumps the liquid and is driven by a motor power source, the induction bowl 3, a feed pump 4 operating as a venturi nozzle , a plurality of changeover valves 6, 7, 8 in the various liquid lines 9, 10, 11, 12, 13 and a spray bar 14 and a stirring device 15. In the liquid tank 1 is added Next filled as a carrier liquid water to feed the liquid and granulated active agent in the liquid tank and mix with the water to a spray mixture, they are first entered into the dispenser 3, where they are optionally dissolved and mixed with and liquid over the Pump 2 and the lines 9 and 12 is introduced into the dispenser 3. At the same time, the Venturi nozzle 4 is acted upon by the liquid flow via the pump 2 and the line 13. This creates a negative pressure in the region of the venturi 4, so that the liquid or the liquefied active agent is then introduced via the line 16 with the water and via the venturi 4 and the line 17 into the liquid tank 1. Via the agitated by the pump 2 and the line 18 with liquid sucked from the tank 1, the water is mixed with the liquid introduced via the line 17 into the liquid tank 1 and prediluted in the dispenser 3 with the liquid by pumping.

When the active agent has been introduced via the dispensing container 3 into the liquid tank 1, as described above, the two shut-off valves 6, 7 are brought into shut-off position according to FIG. 2, so that the pump 2 only sucks the liquid out of the liquid tank 1 and over the stirring device 15 again introduces into the liquid tank 1. By this circulation pumping and by stirring the amount of water present in the liquid tank 1 with the active agent agent fed in, a homogeneous spray mixture is obtained in a mixing manner by stirring and thorough mixing.

In order to form a homogeneous spray mixture after mixing the water with the active agent, the three-way stopcock 8 is then brought into the position shown in FIG. 3 in order to deliver the spray mixture via the pump 2 and the lines 10, 11 and one not shown Dispensing fitting in an adjustable manner on the spray nozzles 19 of the spray bar 14 on the target surface.

The injection apparatus according to the prior art liquid plan according to FIG. 4 comprises a liquid tank 20 for receiving carrier liquid, usually water, a liquid-conveying pump 21, a line 22 leading to a spray bar 14 equipped with spray nozzles 19 , in which the mixing device 23 is arranged, on. About the metering pump 24 is concentrated drug sucked from the active substance container 25 via the line 26 and fed via line 27 into the carrier liquid leading line 22. In the mixing device 23, the concentrated active agent agent is mixed with the carrier liquid. In this case, one speaks of a direct feed of the active ingredient in the carrier liquid. The feeding of the concentrated active agent into the carrier liquid and the mixing of the carrier liquid takes place directly and continuously during the injection process during the application of the active substance mixed with the carrier liquid via the spray nozzles 19 of the spray bar 14.

The explanation of the application of active agent agents in agricultural practice by premixed spray mixture according to the liquid plan of Fig. 1 and 3 and the classic direct injection according to the liquid plan of Fig. 4 is used to better understand the below-described inventive predilute the active ingredient according to the liquid plans ^{' shown in} FIG 5 and 6.

5 and 6 has a liquid tank 28 for receiving carrier liquid, usually water, a fluid-conveying pump 29, a leading to a spray bar 14, which is equipped with spray nozzles 19, leading line 30, in which the mixing device 31 is arranged, on. The spray nozzles 19 are arranged at a distance from the spray bar 14. Furthermore, the spraying device has the premixing container 32, which is connected via a branch 33 with the liquid-conveying pump 29 and carrier liquid-carrying line 30 via the line 34. This line 34 opens in premix tank 32. In this line 34 a stopcock 35 is arranged. Between the premix tank 32 and the liquid pump 29 leading to the spray bar 14 leading line 30 is seen in the flow direction 36 a in this line 30 in front of the mixing device 31 opening line 37 is arranged. In this line 37, which leads from the premix tank 32 to the line 30 leading from the pump 29 to the spray bar 14, a metering pump 38 is arranged. In the line leading from the pump 29 to the spray bar 14, a metering fitting (not shown) is arranged in front of the mouth of the line 37 coming from the premix tank 32. As seen in the flow direction 36 of the carrier liquid line 30, the line 37 leads into the carrier liquid line 30 behind the pump 29 arranged in the carrier liquid line 30. The mode of operation of the spray device according to the invention is the following:

In the liquid tank, carrier liquid 28, generally water, is first introduced via a filling opening. In the pre-mixing tank 32 granulated or liquid active agent, as shown in FIG. 5 symbolically represented by the containers 39, filled before the start of the injection process. For dissolving granulated active ingredient and for prediluting the filled active agent is sucked by the pump 29 from the liquid tank carrier liquid as dilution liquid and fed via line 34 into the premix tank 32. This dissolves granulated active agent and dissolves liquid and granular dissolved active agent with the diluting liquid, typically water, before dispensing the liquid and / or prediluting in the premix container. By means of a corresponding mixing and stirring device (not shown) in the pre-mixing tank 32, a homogeneous prediluted active agent charge is generated.

For discharging the active agent on the respective target surface via the spray nozzles 19, the stopcock 35 in the line 34 leading from the pump 29 into the premix tank 32 is brought from the flow position shown in FIG. 5 into the shut-off position shown in FIG the line 30 arranged as a three-way stopcock 40 trained shut-off valve is brought from the shut-off position shown in Fig. 5 in the flow position shown in Fig. 6. By means of the liquid-conveying pump 29, carrier liquid, as a rule water, is sucked out of the liquid tank 28 and pumped via the line 30 to the spray nozzles 19 of the spray bar 14. The carrier liquid quantity supplied to the spray nozzles 19 is adjusted in pressure and quantity by means of a metering fitting, not shown, which is arranged in the line 30. At the same time, the presupplied active agent agent is sucked in from the premixing container 32 and metered into the carrier liquid of the line 30 via the metering pump 28. The prediluted active substance medium is intensively mixed with the carrier liquid in the mixing device 31, so that a homogeneous spray mixture is produced, which can be applied via the spray nozzles 19.

The premix container 32 has a volume such that for feeding prediluted active agent into the container located in the liquid tank 28 gerflüssigkeit sufficiently vorverdünntes drug agent is present in Vormischbehälter. The capacity of Vormischbehälters 32 is limited to the max. Capacity of carrier liquid of the liquid tank tuned. It has been found that the volume of the Vormischbehälters 32 should be about 1/10 of the volume of the liquid tank 28 or at least 100 liters.

In order to keep the premixed active agent in homogeneous solution even under difficult conditions, a stirring device, not shown, is assigned in the premixing tank 32, which is fed via the line 41 from the metering pump 38.

Thus, according to the spraying device according to the invention, a method is provided for using an injection device, by means of which in a separate operation before applying the liquid on agricultural surfaces in the pre-mixing tank 32, the active agent means with a diluent liquid, usually water, prediluted and / or if it is granulated active agent agent is dissolved. There is always prediluted and dissolved so much active agent in Vormischbehälter 32 in this operation prior to the actual dispensing of the liquid, which is sufficient for at least for application in a carrier liquid amount that can accommodate the carrier liquid container 28 maximum. During the injection process, the at least one prediluted and / or, if it is granulated active agent, dissolved and prediluted active agent agent is fed into the carrier liquid in metered manner via the metering pump 38. In the mixing chamber of the mixing device 31, the at least one prediluted active agent agent is uniformly mixed with the carrier liquid.

The further liquid plan according to FIGS. 7 and 8 differs from the liquid plan according to FIGS. 5 and 6 in that the metering line 37 arranged between the premix tank 32 and the carrier liquid line 30, in which the metering pump 38 is arranged, is seen in the flow direction 36 in front of the arranged in the carrier liquid line 30 pump 29 opens into the carrier liquid line 30. In this way, an inexpensive metering pump 38 can be used because it does not have to feed the prediluted active agent agent against an increased pressure in the carrier liquid line 30, but in this area the carrier liquid is sucked out of the carrier liquid tank 28. So here is a suction pressure prevails.

Claims

claims

1.

Spraying device for dispensing liquids, ^' in particular for agricultural purposes, with a vehicle associated with a spray bar assembly having at least one transverse to the direction of liquid line provided at intervals with spray nozzles, wherein the spray nozzles via the at least one liquid line at least one liquid to be dispensed each of characterized in that a pre-mixing container (32) for pre-diluting and / or dissolving at least one pumping the carrier liquid from a liquid tank and the injection pressure generating metering pump and at least one at least one active agent conveying and in the carrier liquid in a metering manner feeding pump in an adjustable amount can be supplied the at least one active agent agent (39) is provided with and / or in dilution liquid prior to the discharge of the liquids, that the premixing container (32) via at least one Leit (37) with which at least before the dispensing of the liquids, a prediluted active agent means (39) in the carrier liquid feeding metering pump (38) is connected.

Second

Spraying device according to claim 1, characterized in that between the feed point of the prediluted active agent in the carrier liquid line (30) and the spray nozzles (19) of the spray bar assembly (14) in the carrier liquid line, a mixing device (31) is arranged.

Third

Spraying device according to claim 1, characterized in that the pre-mixing container (32) has at least one such volume, that sufficient pre-diluted active ingredient in the liquid tank (28) is located carrier liquid sufficiently pre-diluted active agent from Vormischbehälter (32) matched to the maximum Capacity of the carrier liquid of the liquid tank (28) is receivable.

4th

Spraying device according to claim 3, characterized in that the capacity volume of premix tank (32) max. 1/10 volume of the liquid tank (28) or at least 100 l.

5th

Spraying device according to claim 1, characterized in that the premix container

(32) is associated with a stirring device.

6th

Spraying device according to Claim 1, characterized in that the metering line (37), which is arranged between the premixing container (32) and the carrier liquid line (30) and in which the metering pump (38) is arranged, is located downstream of the liquid carrier line (36) in the direction of flow (36). 30) arranged pump (29) opens into the carrier liquid line (30).

7th

Spraying device according to Claim 1, characterized in that the metering line (37), which is arranged between the premixing container (32) and the carrier liquid line (30) and in which the metering pump (38) is arranged, is located in the direction of flow (36) in front of the carrier liquid line (36). 30) arranged pump (29) opens into the carrier liquid line (30).

8th.

Method for using an injection device according to one or more of the preceding claims 1 to 4, characterized in that prediluted in a separate operation before applying the liquid on agricultural surfaces in the premixing container (32) the active agent means (39) with a diluting liquid and / or is dissolved, that at least as much active agent in the premixing container (32) is prediluted and dissolved in this operation, which is sufficient at least for application with a carrier liquid amount, which can accommodate the carrier liquid container (28) maximum, and that during the injection process via the metering pump (38) the at least one prediluted and / or dissolved active agent in the carrier liquid line in metered manner and fed in the mixing chamber (31) the at least one pre-diluted active agent is uniformly mixed with the carrier liquid.