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EP1034891B1 - Dispositif et procédé de nettoyage - Google Patents

Dispositif et procédé de nettoyage Download PDF

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Publication number
EP1034891B1
EP1034891B1 EP00104095A EP00104095A EP1034891B1 EP 1034891 B1 EP1034891 B1 EP 1034891B1 EP 00104095 A EP00104095 A EP 00104095A EP 00104095 A EP00104095 A EP 00104095A EP 1034891 B1 EP1034891 B1 EP 1034891B1
Authority
EP
European Patent Office
Prior art keywords
water
compressed air
pressure
conduit
mixture
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.)
Expired - Lifetime
Application number
EP00104095A
Other languages
German (de)
French (fr)
Other versions
EP1034891A3 (en
EP1034891A2 (en
Inventor
Josef Keizers
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.)
torbo Engineering Keizers GmbH
Original Assignee
torbo Engineering Keizers GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by torbo Engineering Keizers GmbH filed Critical torbo Engineering Keizers GmbH
Publication of EP1034891A2 publication Critical patent/EP1034891A2/en
Publication of EP1034891A3 publication Critical patent/EP1034891A3/en
Application granted granted Critical
Publication of EP1034891B1 publication Critical patent/EP1034891B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/0015Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with control of feed parameters, e.g. feed rate of abrasive material or carrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • B24C7/003Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier with means for preventing clogging of the equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0084Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a mixture of liquid and gas

Definitions

  • the present invention relates to a cleaning device according to the preamble of Claim 1 and a method according to the preamble of claim 13.
  • a device and a method are known from US Pat. No. 5,283,991, in which a mixture of water and solid particles is generated in a pressure vessel and is stored under pressure.
  • water comes from a water connection pumped with pressure into the pressure vessel, so that at an outlet of the pressure vessel, the mixture exits the pressure vessel under pressure.
  • the mixture is conveyed to a nozzle via a switching device, through which it is dispensed onto the surface to be cleaned.
  • the switching device also has a compressed air connection, so that via the switching device compressed air can also be directed to the outlet nozzle.
  • the cleaning device or method is used so that the switching device first compressed air is output at the outlet nozzle. With this Compressed air can initially be cleaned from loosely adhering surfaces Dirt are freed.
  • the operator must in the known device or method depending on the pressure conditions, d. H. the set air pressure or water pressure, the different flows, such as B. water-solid flow, water flow or compressed air flow, over various Adjust adjustment devices, so that for the desired cleaning success required mixing ratios between the individual streams and jet quantities be respected.
  • the object of the invention is therefore a method and an apparatus for execution of the process that is easy to use, i.e. that the operator largely exempt from monitoring and setting tasks, whereby at the same time a constant and good dosage of compressed air, pressurized water and mixture as well as economical use of water is achieved.
  • the cleaning device should be simple and safe and sufficient Provide performance.
  • the water supply device a Water supply unit with a safety switch that includes the cleaning device switches off before the water supply becomes insufficient. Thereby it is ensured that only water enters the pressure tank during operation is pumped and no air through which the safety of the pressure vessel could be endangered. Due to the constant water supply from the water supply unit is a constant flow of water to the cleaning device guaranteed.
  • the pressure increasing device which provides the water supplied as pressurized water for the device automatically can be controlled via the compressed air, so that the pressurized water always has a 20% higher pressure value than compressed air.
  • This control of the pressure increasing device via the compressed air can therefore done automatically because not having a fluctuating water supply a regulation of the compressed air, which controls the pressure increasing device, responds must become.
  • the water supply unit advantageously comprises a water reservoir, which serves as an intermediate buffer, being on the water reservoir a float switch is provided which performs the functions of the safety switch takes over. If the water in the water reservoir drops below a certain level Minimum height, so the float switch responds and switches off the device. This ensures that sufficient water is available during operation of the cleaning device Way is available.
  • the water reservoir also has an overflow switch on the water supply to the water reservoir stops when a water level is reached. This avoids that excessive water is consumed that is not needed.
  • the water reservoir to provide a solids separator so that excess water from the Pressure vessel that has an overflow opening when filling the pressure vessel can run to the water reservoir of the water supply device can be traced back. Because the excess water from the pressure tank Can contain solid parts, it is necessary to remove them before returning the Separate water for water supply with a solids separator.
  • the pressure booster for generating the pressurized water to be controlled automatically via the connected compressed air.
  • the regulation takes place in such a way that by directly on the pressure booster compressed air the water pressure generated is about 20% higher that of the adjacent compressed air. This will ensure that the water pressure is always approx. 20% or 0.2 - 0.8 bar higher than the connected air pressure.
  • This is advantageous because it adds water and / or mixture to the compressed air flow, the water or the mixture with pressure is entered into the compressed air flow. This has the consequence that when mixing of the different flows no injector effect occurs and the desired one Dosage can thus be adhered to exactly.
  • a water supply line is provided between the outlet line, which is connected to the outlet of the pressure vessel, and the pressure booster a water supply line is provided, if necessary additional pressurized water can be added to the mixture.
  • the water, compressed air and water solid streams are advantageously led to the outlet nozzle via switching devices.
  • the various flows to the outlet nozzle can be activated or blocked become.
  • these switching devices run as valves where it is also possible to adjust the volume flow to regulate, it is advantageous to design these switching devices as on / off switches, which only allow compressed air, pressurized water or a mixture to be switched on or cordon off. If the switching devices are designed as on / off switches, so it is particularly advantageous to add additional dosing devices in the different Lines such as compressed air line, water line, water supply line and / or water injection line, d.
  • the pipe with the pressurized water in the Pressure vessel is injected to convey the mixture out of the pressure vessel, provided.
  • the enforced Amounts of compressed air and / or water can be regulated.
  • the metering devices are advantageously designed as metering valves inside each a perforated disc with different sized bores have, so that depending on the set bore, the flow rate is precisely defined and is reproducibly adjustable. It is advantageous if the metering devices are installed in the lines so that the pressure drop at Operation on the dosing devices only slight, i.e. approx. 0.2 - 0.8 bar.
  • the water supply in the device or method according to the invention and the pressure ratio between water and air was kept constant is, it is through the described dosing devices, in particular with the perforated disk valves possible, precise and reproducible dosing settings make.
  • the operator can thus easily operate the metering devices set a certain flow rate and this, for example read off on a scale on the dosing devices and he can be sure be that in relation to the connected compressed air flow, d. H. independently from this, the desired amount of water or mixture, metered becomes.
  • the operator does not have to adjust the water pressure and thus no replenishment of the water or compressed air flows as a result of changed water pressure-air pressure ratio.
  • the cleaning device or method according to the invention ensures that only non-compressible water is supplied to the pressure vessel and thus a corresponding amount of mixture from the pressure vessel exit. This also supports the exact dosage.
  • a preferred embodiment is to achieve a greater cleaning performance equipped with a second compressed air supply device, parallel to the first compressed air supply device on the compressed air line connected. This means that a higher compressed air output is available if required be put.
  • the second compressed air supply device is advantageously switched so that first the amount of compressed air from the first Compressed air supply device can be controlled via a metering device can, and if this is no longer sufficient, the compressed air of the second compressed air supply device can be switched on.
  • an auxiliary line is provided, whose cross section compared to the two aforementioned lines is essential is smaller.
  • a filling device for. B. in the form of a filling funnel, provide a closable water connection, to which via a line pressurized water can be supplied from the pressure increasing device, so that the filling of the solid parts is facilitated by water supply.
  • the switching and / or metering devices are preferably in the various Cables designed as electropneumatic valves that use compressed air, which is branched off from the compressed air supply device, are actuated. It is particularly preferred to use a compressed air tank as an intermediate store to provide for actuation of the switching and / or metering devices guarantee even if the compressed air supply should fail.
  • the electropneumatic Valves also have the advantage that they also have a Remote control can be controlled so that the operator, for example works on the outlet nozzle far away from the actual cleaning device, operate the switching and / or dosing devices via a remote control can.
  • the cleaning device essentially comprises a water supply device 1, A, a pressure vessel 2 with one attached to it Filling device 3, a pressure increasing device 4, a spray device 27, several lines for carrying water, compressed air and / or mixture as well as several switching and / or dosing devices (21 - 24; 9, 11, 15, 17) for Regulate the respective flow rates.
  • this advantageous embodiment includes another Compressed air supply device C, to increase performance the cleaning device in addition to the compressed air supply device B can be switched on.
  • the water supply device 1, A comprises a water reservoir 1 and one Water connection A. Furthermore, the water tank 1 has two switches 1a, 1b, which are advantageously designed as a float switch, and at Exceeding a water high (switch 1a) or a water low (1b) switch. If the maximum water level is exceeded, the Switch 1a the water supply to the water reservoir 1 by the water connection A is closed. Switch 1b switches when one falls below Water level from the cleaning device.
  • the water supply device 1, A contains a solids separator 1d, which is advantageously arranged in the upper part of the water reservoir 1 is, so that the water level in the water reservoir 1 below the solids separator 1d lies.
  • the solids separator 1d is connected via a line from the Overflow 2b of the pressure vessel 2 is fed and is used for the recovery of solids-free water.
  • the pressure vessel 2 which is used to produce a mixture of water and solid particles and is used to provide this mixture under pressure points at his lower end a water injection 2d and an outlet 2e while in the upper part a filling opening 2a, an overflow 2b and a pressure relief valve 2c are arranged.
  • a filling device 3 in the form of a screen attachment is located directly at the filling opening 2a intended.
  • the screen attachment 3 comprises a funnel-shaped base body, in which a sieve is arranged to remove solid parts, e.g. Sands to seven, like this that the solid parts have the desired grain size.
  • the screen attachment 3 a water connection 3a and a vibrating unit 3b.
  • the water connection is designed so that the water flowing into the sieve attachment 3 fixed parts in it are set in a slight rotation. Through the current of water and / or the vibration generated by the vibrating unit 3b filling the pressure water tank with solid parts is made easier.
  • the pump 4c has an output line 4d, through which the the pump 4c generated pressure water is output.
  • a connection for the compressed air control line 6 is available, via which the Control of the pump necessary compressed air is present. Because of the compressed air of the compressed air control line 6, the pump 4c is controlled so that the Water pressure at the pump outlet 4d is about 20% higher than the air pressure in the compressed air control line 6.
  • the pump outlet 4d is on the one hand connected to the closable via a line Water connection 3a of the filling device 3 connected.
  • the other is Pump outlet 4d of the pressure booster 4 via the water injection line 12 connected to the water injection 2d of the pressure vessel 2.
  • a metering device 11 a check valve RV and a pressure gauge 13 intended.
  • the amount of water, the Injection 2d is fed into the pressure vessel 2 can be set.
  • the pump outlet 4d of the pressure increasing device 4 connected to the water switching device 22 via the water line 18.
  • the Water pipe 18 is also a metering device 17 and a check valve RV arranged.
  • Another water supply line 16 is parallel to the water injection line 12 and to the water line 18 at the pump outlet 4d of the pressure booster 4 connected.
  • This water supply line 16 also has a metering device 15 and a check valve RV on.
  • the other end of the water supply line 16 opens into the outlet line 20, which extends from the outlet 2e of the Pressure vessel 2 extends to the mixture switching device 23. In this way it is possible to mix the mixture from the pressure vessel 2 to the mixture switching device 23 is guided, in addition one via the metering device 15 add adjustable amount of water.
  • auxiliary line 14 is also provided in the exemplary embodiment shown, which starts from the water injection line 12 and in the vicinity of the outlet 2e of the pressure vessel 2 opens into the outlet line 20.
  • the cross section of the Auxiliary line 14 is opposite the cross sections of the water injection line 12 and the outlet line 20 greatly reduced, so that only a small amount of Water can flow through the auxiliary line 14, however, this reduces the outflow of the mixture relieved from the pressure vessel 2.
  • the auxiliary line 14 also has a Check valve RV on.
  • the cleaning device has a compressed air switching device 21 on.
  • This compressed air switching device 21 is via the compressed air line 19 with the second compressed air supply device C and via the connecting lines 8 and 5 connected to the first compressed air supply device B.
  • the connecting line 8 is also a metering device 9 and a check valve RV provided in the connecting line 8 .
  • the compressed air line 19 can also be a Have manomotors 10.
  • a quick release switching device 24 provided, which is connected to a quick drain line 25 is.
  • the switching devices 21-24 are in the exemplary embodiment shown designed as an on / off switch and are advantageously one behind the other arranged that the compressed air switching device 21 of the water switching device 22 is connected upstream, while the water switching device 22 in turn the Mixture switching device 23 is connected upstream. This way, when open Compressed air switching device 21 the compressed air flow by opening the water switching device 22 water or by opening the mixture switching device 23 a mixture can be added without damage to the solid parts on the compressed air switching device 21 or the water switching device 22 could cause. Subsequent to the mixture switching device 23, the quick-release switching device 24 is arranged.
  • the quick-release switching device 24 is designed so that when open Quick drain switch 24 of access to the quick drain line 25 is open is, and thus compressed air, water and / or mixture via the quick drain line 25 can be drained. Because the diameter of the quick drain line 25 is substantially larger than the diameter of the spray line 26, is therefore a ensures that the cleaning device is switched off quickly.
  • the switching devices 21-24 and the metering devices of 9, 11, 15 and 17 are advantageously in the embodiment shown as electropneumatic Valves executed. This makes it possible for them, for example also by a remote control, which is advantageously on the spray device 27 can be operated.
  • the one for actuating the electropneumatic Valves necessary compressed air is supplied by the compressed air supply device B provided, advantageously a compressed air tank 7a is interposed as a buffer, so that a constant supply of the electropneumatic Valves with compressed air is ensured.
  • the cleaning device according to the invention according to the present embodiment is operated in the following way:
  • the compressed air tank 2 with solid parts i.e. H. granular materials, which are clay-free and heavier than water and have a grain size of up to max. 3 mm own, e.g. B. sand or the like.
  • the fixed parts and / or water is poured into the filling opening 2a via the sieve attachment 3. Due to the higher weight of the fixed parts, they decrease when the pressure vessel is filled 2 down while the lighter water at the open overflow 2b can escape. Since the overflow 2b connected to the solid separator 1d is, the excess water in the solid separator 1d from the solid parts separated and then the water supply device 1, A available posed.
  • the pressure vessel 2 is filled with solid parts and / or water as long as until the solid parts reach the overflow 2b. Then the overflow 2b closed and the rest of the pressurized water tank is up to the filling opening 2a filled up with water. This residual filling with water can over injection 2d or via fill opening 2a.
  • the padding with Water via the injection 2d has the advantage that the solid parts in the lower Area can be loosened somewhat by the penetrating water. Is the pressure vessel 2 completely filled with water, the filling opening 2a is closed and the pressure vessel 2 is pressurized via the injection 2d set.
  • the pump 4c is directly via the compressed air control line 6 through the compressed air supply device B controlled so that the water pressure or the pressure in Pressure vessel 2 is approximately 0.2 to 0.8 bar higher than the connected air pressure.
  • cleaning can only be carried out with compressed air.
  • the compressed air switching device 21 open while the other switching devices 22-24 are closed are. Compressed air is thus supplied from the first via lines 5, 8 and 19 Compressed air supply device B directed to the spray device 27.
  • the amount of compressed air can be regulated by adjusting the metering device 9. If particularly powerful cleaning with compressed air is required, this can also be done the second compressed air supply device C can be connected and the metering device 9 are opened completely.
  • a second cleaning option is to add water to the compressed air flow add.
  • the switching device 22 is additionally opened.
  • the amount added water can be adjusted by the metering device 17. Since the water pressure in the cleaning device by the pressure increasing device 4 is greater than the pressure of the compressed air, the added water with overpressure added to the compressed air flow. This ensures that the on the dosing device 17 set amount is observed.
  • Another way of cleaning is to enter the compressed air flow Add mixture of water and solid particles.
  • Compressed air switching device 21 opened the mixture switching device 23 while the switching devices 22 and 24 are closed. With that, too with overpressure, the mixture coming from the pressure vessel 2, the Leaves pressure vessel 2 through outlet 2e, entered into the compressed air flow. Due to the water injection 2d, the pressure vessel 2 is simultaneously continuous Water added so that the built up by the pressure increasing device 4 Pressure in pressure vessel 2 is maintained. The same amount of water that is supplied to the pressure vessel 2, thus emerges as a mixture at the outlet 2e.
  • the quick release switch 24 also allows the cleaning device switch off so that the spraying process ends within a very short time becomes. If the switching devices 21-23 are closed, then remains in the u. U. very long spray line 26 a rest of the spray medium, which u. U. can lead to very long post-spraying times. Here is the quick release switch 24 opened, so that located in the spray line 26 Medium through the quick drain line 25, which has a much larger cross section than the spray line 26 has, escape very quickly. So that can if necessary, a very quick interruption of the spraying process can be achieved.
  • the quick cut-off device Compared to the usual squeezing "of the spray line 26, e.g. Hose to achieve a quick break has the quick cut-off device also the advantage that the pressure in the spray line 26 very quickly is degraded and thus sources of danger, e.g. B. burst hose (Spray line 26) can be avoided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Nozzles (AREA)
  • Vehicle Body Suspensions (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Cleaning In General (AREA)

Abstract

The water supply unit (1) comprises at least a water connection (A) and a water preparation unit (1) with safety switch (1b) which switches off the cleaning apparatus when the pressure raising device (4) is no longer supplied with sufficient water. The safety switch can be a floating switch triggered when a certain water level is not reached. An overflow switch can be provided to stop the water supply when the required water level is reached.

Description

Die vorliegende Erfindung betrifft ein Reinigungsgerät nach dem Oberbegriff des Anspruchs 1 und ein Verfahren nach dem Oberbegriff des Anspruchs 13.The present invention relates to a cleaning device according to the preamble of Claim 1 and a method according to the preamble of claim 13.

Aus der US-Patentschrift US-5,283,991 ist ein Gerät und ein Verfahren bekannt, bei dem in einem Druckbehälter ein Gemisch aus Wasser und Festteilen erzeugt und unter Druck bevorratet wird. Beim Betrieb wird Wasser von einem Wasseranschluß mit Druck in den Druckbehälter hineingepumpt, so daß an einem Auslaß des Druckbehälters das Gemisch unter Druck aus dem Druckbehälter austritt. Das Gemisch wird über eine Schalteinrichtung zu einer Düse befördert, über die es auf die zu reinigende Oberfläche ausgegeben wird. Die Schalteinrichtung weist darüber hinaus einen Druckluftanschluß auf, so daß über die Schalteinrichtung auch Druckluft zur Austrittsdüse geleitet werden kann. Üblicherweise wird das Reinigungsgerät bzw. -verfahren so eingesetzt, daß über die Schalteinrichtung zunächst Druckluft an der Austrittsdüse ausgegeben wird. Mit dieser Druckluft können zu reinigende Oberflächen zunächst von lose haftendem Schmutz befreit werden. Soll anschließend stärker haftender Schmutz von der Oberfläche entfernt werden, so kann diesem Luftdruckstrahl über die Schalteinrichtung das Gemisch aus dem Druckbehälter beigemischt werden. Über einen weiteren Anschluß an der Schalteinrichtung, an dem Druckwasser anliegt, ist es möglich, dem Druckluftstrom alternativ oder ergänzend zum Gemisch auch Druckwasser zuzusetzen. Dies ist dann vorteilhaft, wenn das Wasser-Festteile-Mischungsverhältnis verändert werden soll, oder wenn ausschließlich mit Druckluft und Druckwasser gereinigt werden soll.A device and a method are known from US Pat. No. 5,283,991, in which a mixture of water and solid particles is generated in a pressure vessel and is stored under pressure. In operation, water comes from a water connection pumped with pressure into the pressure vessel, so that at an outlet of the pressure vessel, the mixture exits the pressure vessel under pressure. The mixture is conveyed to a nozzle via a switching device, through which it is dispensed onto the surface to be cleaned. The switching device also has a compressed air connection, so that via the switching device compressed air can also be directed to the outlet nozzle. Usually the cleaning device or method is used so that the switching device first compressed air is output at the outlet nozzle. With this Compressed air can initially be cleaned from loosely adhering surfaces Dirt are freed. Should then be more adhering dirt from the Surface can be removed, so this air pressure jet through the switching device the mixture can be mixed in from the pressure vessel. About one it is a further connection to the switching device to which pressurized water is present possible, the compressed air flow as an alternative or in addition to the mixture Add pressurized water. This is advantageous if the water / solid mixture ratio should be changed, or if only with Compressed air and water should be cleaned.

Bei diesem bekannten Reinigungsgerät bzw. -verfahren, hängt der Druck des Druckwassers von dem angeschlossenen Luftdruck und dem angeschlossenen Wasserdruck ab, wobei die den Druck des Druckwassers regelnde Druckluft über ein Ventil eingestellt werden muß. Da es für die Sicherheit des Druckbehälters außerordentlich wichtig ist, daß keine Luft in den Druckbehälter gelangt, da dieses im Gegensatz zum Wasser komprimierbar ist und deshalb veränderte Sicherheitsanforderungen an den Druckbehälter stellt sowie den Betrieb des Gerätes stört, ist es wichtig, daß der Bediener ständig die Wasserzufuhr von dem Wasseranschluß kontrolliert und die Druckverhältnisse in dem Reinigungsgerät, insbesondere den Druck im Druckbehälter in Abhängigkeit des Vordrucks des Wassers, über das o. g. Ventil regelt, falls die Wasserversorgung über den Wasseranschluß schwankt, oder für den gewünschten Wasserdruck keine ausreichenden Wassermengen bereitgestellt werden können. Darüber hinaus muß der Bediener bei dem bekannten Gerät bzw. Verfahren je nach den Druckverhältnissen, d. h. dem eingestellten Luftdruck bzw. Wasserdruck, die verschiedenen Ströme, wie z. B. Wasser-Festteile-Fluß, Wasserfluß oder Druckluftstrom, über verschiedene Einstelleinrichtungen regeln, damit die für den gewünschten Reinigungserfolg benötigten Mischungsverhältnisse zwischen den einzelnen Strömen und Strahlmengen eingehalten werden. Dies hängt jedoch auch wieder von den eingestellten Werten für Druckluft und Druckwasser bzw. ihrem Verhältnis zueinander ab.In this known cleaning device or method, the pressure of the Pressure water from the connected air pressure and the connected Water pressure decreases, the compressed air regulating the pressure of the pressurized water via a valve must be set. As it is for the safety of the pressure vessel It is extremely important that no air gets into the pressure vessel, as this in contrast to water is compressible and therefore changed safety requirements to the pressure vessel and the operation of the device disturbing, it is important that the operator constantly keep the water supply from the water connection checked and the pressure conditions in the cleaning device, in particular the pressure in the pressure vessel depending on the pre-pressure of the water, about the above Valve controls if the water supply is via the water connection fluctuates, or insufficient for the desired water pressure Amounts of water can be provided. In addition, the operator must in the known device or method depending on the pressure conditions, d. H. the set air pressure or water pressure, the different flows, such as B. water-solid flow, water flow or compressed air flow, over various Adjust adjustment devices, so that for the desired cleaning success required mixing ratios between the individual streams and jet quantities be respected. However, this also depends on the set Values for compressed air and pressurized water or their relationship to each other from.

Aufgabe der Erfindung ist es deshalb, ein Verfahren sowie ein Gerät zur Ausführung des Verfahrens zu schaffen, das bedienungsfreundlich ist, d.h. das den Bediener weitgehend von Überwachungs- und Einstellaufgaben befreit, wobei gleichzeitig eine gleichbleibende und gute Dosierung von Druckluft, Druckwasser und Gemisch sowie ein sparsamer Umgang mit Wasser erreicht wird. Darüber hinaus soll das Reinigungsgerät einfach und sicher aufgebaut sein und eine ausreichende Leistung bereitstellen.The object of the invention is therefore a method and an apparatus for execution of the process that is easy to use, i.e. that the operator largely exempt from monitoring and setting tasks, whereby at the same time a constant and good dosage of compressed air, pressurized water and mixture as well as economical use of water is achieved. About that In addition, the cleaning device should be simple and safe and sufficient Provide performance.

Diese Aufgabe wird gelöst durch ein Reinigungsgerät mit den Merkmalen des Anspruchs 1 bzw. durch ein Verfahren mit den Merkmalen des Anspruchs 13. Vorteilhafte Ausführungsformen sind Gegenstand der Unteransprüche.This object is achieved by a cleaning device with the features of Claim 1 or by a method with the features of claim 13. Advantageous embodiments are the subject of the dependent claims.

Wesentlich bei dem erfindungsgemäßen Reinigungsgerät bzw. Verfahren ist, daß die Wasserversorgung konstant ist und automatisch überwacht wird. Dies wird erfindungsgemäß dadurch erreicht, daß die Wasserversorgungseinrichtung eine Wasserbereitstellungseinheit mit einem Sicherheitsschalter umfaßt, der das Reinigungsgerät abschaltet, bevor die Wasserversorgung unzureichend wird. Dadurch wird gewährleistet, daß beim Betrieb ausschließlich Wasser in den Druckbehälter gepumpt wird und keine Luft, durch die die Sicherheit des Druckbehälters gefährdet werden könnte. Durch die konstante Wasserzufuhr aus der Wasserbereitstellungseinheit ist ein konstanter Wasserzufluß zu dem Reinigungsgerät gewährleistet. Dies ermöglicht wiederum, daß die Druckerhöhungseinrichtung, die das zugeführte Wasser als Druckwasser für das Gerät bereitstellt, automatisch über die Druckluft gesteuert werden kann, so daß das Druckwasser immer einen um ca. 20 % erhöhten Druckwert gegenüber der Druckluft aufweist. Diese Steuerung der Druckerhöhungseinrichtung über die Druckluft kann deshalb automatisch erfolgen, weil nicht auf eine schwankende Wasserzufuhr mit einer Regelung der Druckluft, die die Druckerhöhungseinrichtung steuert, reagiert werden muß.It is essential in the cleaning device or method according to the invention that the water supply is constant and is monitored automatically. this will achieved according to the invention in that the water supply device a Water supply unit with a safety switch that includes the cleaning device switches off before the water supply becomes insufficient. Thereby it is ensured that only water enters the pressure tank during operation is pumped and no air through which the safety of the pressure vessel could be endangered. Due to the constant water supply from the water supply unit is a constant flow of water to the cleaning device guaranteed. This in turn enables the pressure increasing device, which provides the water supplied as pressurized water for the device automatically can be controlled via the compressed air, so that the pressurized water always has a 20% higher pressure value than compressed air. This control of the pressure increasing device via the compressed air can therefore done automatically because not having a fluctuating water supply a regulation of the compressed air, which controls the pressure increasing device, responds must become.

Vorteilhafterweise umfaßt die Wasserbereitstellungseinheit einen Wasservorratsbehälter, der als Zwischenpuffer dient, wobei an dem Wasservorratsbehälter ein Schwimmschalter vorgesehen ist, der die Aufgaben des Sicherheitsschalters übernimmt. Sinkt das Wasser in dem Wasservorratsbehälter unter eine bestimmte Mindesthöhe, so spricht der Schwimmschalter an und schaltet das Gerät ab. Damit ist gewährleistet, daß beim Betrieb des Reinigungsgeräts Wasser in ausreichender Weise zur Verfügung steht.The water supply unit advantageously comprises a water reservoir, which serves as an intermediate buffer, being on the water reservoir a float switch is provided which performs the functions of the safety switch takes over. If the water in the water reservoir drops below a certain level Minimum height, so the float switch responds and switches off the device. This ensures that sufficient water is available during operation of the cleaning device Way is available.

In einer vorteilhaften Ausführungsform weist der Wasservorratsbehälter weiterhin einen Überlaufschalter auf, der die Wasserzufuhr zu dem Wasservorratsbehälter stoppt, wenn ein Wasserhöchststand erreicht ist. Damit wird vermieden, daß übermäßig Wasser verbraucht wird, das nicht benötigt wird.In an advantageous embodiment, the water reservoir also has an overflow switch on the water supply to the water reservoir stops when a water level is reached. This avoids that excessive water is consumed that is not needed.

Zur Wassereinsparung ist es weiterhin vorteilhaft, an dem Wasservorratsbehälter einen Feststoffabscheider vorzusehen, so daß überschüssiges Wasser aus dem Druckbehälter, das über eine Überlauföffnung beim Befüllen des Druckbehälters ablaufen kann, zum Wasservorratsbehälter der Wasserversorgungseinrichtung zurückgeführt werden kann. Da das überschüssige Wasser aus dem Druckbehälter Festteile enthalten kann, ist es notwendig, diese vor der Rückführung des Wassers zur Wasserversorgung mit einem Feststoffabscheider abzutrennen.To save water, it is also advantageous to the water reservoir to provide a solids separator so that excess water from the Pressure vessel that has an overflow opening when filling the pressure vessel can run to the water reservoir of the water supply device can be traced back. Because the excess water from the pressure tank Can contain solid parts, it is necessary to remove them before returning the Separate water for water supply with a solids separator.

Wie bereits oben erwähnt, ist es durch die konstante und automatische Wasserversorgung möglich, die Druckerhöhungseinrichtung zur Erzeugung des Druckwassers automatisch über die angeschlossene Druckluft zu regeln. Die Regelung erfolgt dabei in der Weise, daß durch die unmittelbar an der Druckerhöhungseinrichtung anliegende Druckluft der erzeugte Wasserdruck um ca. 20 % über dem der anliegenden Druckluft ist. Dadurch wird sichergestellt, daß der Wasserdruck immer ca. 20 % bzw. 0.2 - 0,8 bar höher ist als der angeschlossene Luftdruck. Dies ist deshalb vorteilhaft, weil somit bei einer Zugabe von Wasser und/oder Gemisch zum Druckluftstrom das Wasser bzw. das Gemisch mit Druck in den Druckluftstrom eingegeben wird. Dies hat zur Folge, daß bei der Mischung der verschiedenen Ströme keine Injektorwirkung auftritt und die gewünschte Dosierung somit genau eingehalten werden kann.As mentioned above, it is through the constant and automatic water supply possible, the pressure booster for generating the pressurized water to be controlled automatically via the connected compressed air. The regulation takes place in such a way that by directly on the pressure booster compressed air the water pressure generated is about 20% higher that of the adjacent compressed air. This will ensure that the water pressure is always approx. 20% or 0.2 - 0.8 bar higher than the connected air pressure. This is advantageous because it adds water and / or mixture to the compressed air flow, the water or the mixture with pressure is entered into the compressed air flow. This has the consequence that when mixing of the different flows no injector effect occurs and the desired one Dosage can thus be adhered to exactly.

Bei einer besonders vorteilhaften Ausführungsform ist zwischen der Auslaß-Leitung, die am Auslaß des Druckbehälters angeschlossen ist, und der Druckerhöhungseinrichtung eine Wasserzusetzleitung vorgesehen, über die bei Bedarf zusätzliches Druckwasser dem Gemisch zugesetzt werden kann. Dies hat den Vorteil, daß durch die Menge an zusätzlich zugesetztem Wasser das Verhältnis Wasser/Festteile entsprechend den Reinigungserfordernissen in einfacher Weise verändert werden kann. Während das Verhältnis Wasser zu Festteile bei der im Druckbehälter erzeugten Mischung bei üblicherweise 80 vol-% Festteilen zu 20 vol-% Wasser liegt, kann dieses Verhältnis durch Zugabe von Wasser über die Wasserzusetzleitung in Richtung auf einen größeren Wasseranteil verändert werden. In a particularly advantageous embodiment, between the outlet line, which is connected to the outlet of the pressure vessel, and the pressure booster a water supply line is provided, if necessary additional pressurized water can be added to the mixture. This has the Advantage that the ratio by the amount of additional water added Water / solid parts in a simple manner according to the cleaning requirements can be changed. While the ratio of water to solid particles in the Pressure vessel produced mixture with usually 80 vol% solids to 20 vol-% water, this ratio can be increased by adding water Water supply line changed in the direction of a larger proportion of water become.

Die Wasser-, Druckluft- und Wasser-Festteile-Ströme werden vorteilhafterweise über Schalteinrichtungen zur Austrittsdüse geführt. Durch die Schalteinrichtungen können die verschiedenen Ströme zur Austrittsdüse freigeschaltet oder gesperrt werden. Obwohl es selbstverständlich möglich ist, diese Schalteinrichtungen als Ventile auszuführen, bei denen es auch möglich ist, den Volumenstrom zu regeln, ist es vorteilhaft, diese Schalteinrichtungen als Ein-/Aus-Schalter auszuführen, die es nur erlauben, Druckluft, Druckwasser oder Gemisch zuzuschalten oder abzusperren. Sind die Schalteinrichtungen als Ein-/Aus-Schalter ausgeführt, so ist es besonders vorteilhaft, zusätzliche Dosiervorrichtungen in den verschiedenen Leitungen, wie Druckluftleitung, Wasserleitung, Wasserzusetzleitung und/oder Wassereinspritzleitung, d. h. die Leitung, mit der Druckwasser in den Druckbehälter eingespritzt wird, um das Gemisch aus dem Druckbehälter herauszubefördern, vorzusehen. Über diese Dosiervorrichtungen können die durchgesetzten Mengen an Druckluft und/oder Wasser geregelt werden.The water, compressed air and water solid streams are advantageously led to the outlet nozzle via switching devices. Through the switching devices the various flows to the outlet nozzle can be activated or blocked become. Although it is of course possible to use these switching devices run as valves where it is also possible to adjust the volume flow to regulate, it is advantageous to design these switching devices as on / off switches, which only allow compressed air, pressurized water or a mixture to be switched on or cordon off. If the switching devices are designed as on / off switches, so it is particularly advantageous to add additional dosing devices in the different Lines such as compressed air line, water line, water supply line and / or water injection line, d. H. the pipe with the pressurized water in the Pressure vessel is injected to convey the mixture out of the pressure vessel, provided. The enforced Amounts of compressed air and / or water can be regulated.

Die Dosiereinrichtungen sind vorteilhafterweise als Dosierventile ausgeführt, die in ihrem Innern jeweils eine Lochscheibe mit verschieden großen Bohrungen aufweisen, so daß je nach eingestellter Bohrung die Durchflußmenge genau definiert und reproduzierbar einstellbar ist. Dabei ist es vorteilhaft, wenn die Dosiereinrichtungen so in die Leitungen eingebaut sind, daß der Druckabfall beim Betrieb an den Dosiereinrichtungen nur geringfügig, d.h. ca. 0.2 - 0.8 bar, ist. Da, wie oben erläutert, bei dem erfindungsgemäßen Gerät bzw. Verfahren die Wasserversorgung und das Druckverhältnis zwischen Wasser und Luft konstant gehalten ist, ist es durch die beschriebenen Dosiereinrichtungen, insbesondere mit den Lochscheibenventilen möglich, genaue und reproduzierbare Dosiereinstellungen vorzunehmen. Der Bediener kann somit in einfacher Weise an den Dosiereinrichtungen eine gewisse Durchflußmenge einstellen und diese, beispielsweise an einer Skala, an den Dosiereinrichtungen ablesen, und er kann sich sicher sein, daß in Bezug auf den angeschlossenen Druckluftstrom, d. h. unabhängig von diesem, die gewünschte Menge an Wasser bzw. Gemisch, zudosiert wird. Der Bediener muß also keine Anpassung des Wasserdrucks vornehmen und somit auch keine Nachdosierung der Wasser- bzw. Druckluftströme infolge eines geänderten Wasserdruck-Luftdruck-Verhältnisses. Da darüber hinaus der Ausgangsstrom aus den Dosierventilen mit Überdruck in die anderen Ströme injiziert wird, entsteht auch keine Injektwirkung, die die Dosierung verfälschen könnte. Ferner ist durch das erfindungsgemäße Reinigungsgerät bzw. Verfahren sichergestellt, daß nur nicht-komprimierbares Wasser dem Druckbehälter zugeführt wird und somit eine entsprechende Menge an Gemisch aus dem Druckbehälter austritt. Auch dies unterstützt die exakte Dosierung.The metering devices are advantageously designed as metering valves inside each a perforated disc with different sized bores have, so that depending on the set bore, the flow rate is precisely defined and is reproducibly adjustable. It is advantageous if the metering devices are installed in the lines so that the pressure drop at Operation on the dosing devices only slight, i.e. approx. 0.2 - 0.8 bar. There, as explained above, the water supply in the device or method according to the invention and the pressure ratio between water and air was kept constant is, it is through the described dosing devices, in particular with the perforated disk valves possible, precise and reproducible dosing settings make. The operator can thus easily operate the metering devices set a certain flow rate and this, for example read off on a scale on the dosing devices and he can be sure be that in relation to the connected compressed air flow, d. H. independently from this, the desired amount of water or mixture, metered becomes. The operator does not have to adjust the water pressure and thus no replenishment of the water or compressed air flows as a result of changed water pressure-air pressure ratio. In addition, the output current injected into the other streams from the metering valves with excess pressure there is also no injecting effect that falsifies the dosage could. Furthermore, the cleaning device or method according to the invention ensures that only non-compressible water is supplied to the pressure vessel and thus a corresponding amount of mixture from the pressure vessel exit. This also supports the exact dosage.

Um eine größere Reinigungsleistung erzielen zu können, ist eine bevorzugte Ausführungsform mit einer zweiten Druckluftversorgungseinrichtung ausgestattet, die parallel zur ersten Druckluftversorgungseinrichtung an der Druckluftleitung angeschlossen ist. Somit kann bei Bedarf eine höhere Druckluftleistung zur Verfügung gestellt werden. Vorteilhafterweise wird die zweite Druckluftversorgungseinrichtung so geschaltet, daß zunächst die Druckluftmenge aus der ersten Druckluftversorgungseinrichtung über eine Dosiereinrichtung gesteuert werden kann, und, falls diese nicht mehr ausreicht, die Druckluft der zweiten Druckluftversorgungseinrichtung zugeschaltet werden kann.A preferred embodiment is to achieve a greater cleaning performance equipped with a second compressed air supply device, parallel to the first compressed air supply device on the compressed air line connected. This means that a higher compressed air output is available if required be put. The second compressed air supply device is advantageously switched so that first the amount of compressed air from the first Compressed air supply device can be controlled via a metering device can, and if this is no longer sufficient, the compressed air of the second compressed air supply device can be switched on.

Bei einer weiteren vorteilhaften Ausführungsform ist zwischen der Wassereinspritzleitung, die das Druckwasser dem Druckbehälter zuführt, und der Auslaß-Leitung, die das Gemisch aus dem Druckbehälter abführt, eine Hilfsleitung vorgesehen, deren Querschnitt gegenüber den beiden vorgenannten Leitungen wesentlich kleiner ist. Damit wird erreicht, daß bei einer schlechten Ableitung des Gemisches aus dem Druckbehälter, z. B. bei Verwendung von Festteilen mit zu großem Durchmesser oder Festteilen ohne Feinanteilen oder von lehmhaltigem Sand als Festteile, der Druckaufstau bei der Einspritzung des Druckwassers in den Druckbehälter über die Hilfsleitung abgebaut werden kann, wobei die Zufuhr von Wasser in der Nähe des Auslasses des Druckbehälters gleichzeitig die Ableitung des Gemisches erleichtert. Damit wird sichergestellt, daß auch unter schwierigen Bedingungen ein reibungsloser Betrieb des Druckbehälters gegeben ist.In a further advantageous embodiment, between the water injection line, which supplies the pressurized water to the pressure vessel and the outlet pipe, which discharges the mixture from the pressure vessel, an auxiliary line is provided, whose cross section compared to the two aforementioned lines is essential is smaller. This ensures that in the event of poor derivation of the Mixture from the pressure vessel, e.g. B. when using fixed parts with large diameter or solid parts without fine particles or loamy Sand as solid parts, the pressure build-up when the pressurized water is injected into the pressure vessel can be dismantled via the auxiliary line, the supply of water near the outlet of the pressure vessel at the same time Derivation of the mixture easier. This ensures that even under difficult conditions given a smooth operation of the pressure vessel is.

Zur besseren Befüllung des Druckbehälters mit Festteilen, insbesondere Sanden, ist es vorteilhaft, an einer Befüllvorrichtung, z. B. in Form eines Befüllungstrichters, einen verschließbaren Wasseranschluß vorzusehen, zu dem über eine Leitung von der Druckerhöhungseinrichtung Druckwasser zugeführt werden kann, so daß das Einfüllen der Festteile durch Wasserzufuhr erleichtert wird.For better filling of the pressure vessel with solid parts, especially sands, it is advantageous to a filling device, for. B. in the form of a filling funnel, provide a closable water connection, to which via a line pressurized water can be supplied from the pressure increasing device, so that the filling of the solid parts is facilitated by water supply.

Vorzugsweise sind die Schalt- und/oder Dosiervorrichtungen in den verschiedenen Leitungen als elektropneumatische Ventile ausgeführt, die über Druckluft, die von der Druckluftversorgungseinrichtung abgezweigt wird, betätigt werden. Besonders bevorzugt ist es, dabei einen Druckluftbehälter als Zwischenspeicher vorzusehen, um eine Betätigung der Schalt- und/oder Dosiervorrichtungen zu gewährleisten, auch wenn die Druckluftversorgung ausfallen sollte. Die elektropneumatischen Ventile besitzen weiterhin den Vorteil, daß diese auch über eine Fernbedienung gesteuert werden können, so daß der Bediener, der beispielsweise an der Austrittsdüse weit entfernt von dem eigentlichen Reinigungsgerät arbeitet, über eine Fernsteuerung die Schalt- und/oder Dosiervorrichtungen bedienen kann.The switching and / or metering devices are preferably in the various Cables designed as electropneumatic valves that use compressed air, which is branched off from the compressed air supply device, are actuated. It is particularly preferred to use a compressed air tank as an intermediate store to provide for actuation of the switching and / or metering devices guarantee even if the compressed air supply should fail. The electropneumatic Valves also have the advantage that they also have a Remote control can be controlled so that the operator, for example works on the outlet nozzle far away from the actual cleaning device, operate the switching and / or dosing devices via a remote control can.

Die wesentlichen Merkmale, Kennzeichen und Vorteile der Erfindung werden im folgenden bei der detaillierten Beschreibung eines Ausführungsbeispiels deutlich, das anhand der beigefügten Zeichnung beschrieben wird. Dabei zeigt,

  • Fig. 1 eine Prinzipskizze eines erfindungsgemäßen Reinigungsgeräts.
  • The essential features, characteristics and advantages of the invention will become apparent in the following in the detailed description of an exemplary embodiment which is described with reference to the accompanying drawing. It shows
  • Fig. 1 is a schematic diagram of a cleaning device according to the invention.
  • Das erfindungsgemäße Reinigungsgerät umfaßt im wesentlichen eine Wasserversorgungseinrichtung 1, A, einen Druckbehälter 2 mit einer darauf angebrachten Befüllvorrichtung 3, eine Druckerhöhungseinrichtung 4, eine Sprühvorrichtung 27, mehrere Leitungen zur Führung von Wasser, Druckluft und/oder Gemisch sowie mehrere Schalt- und/oder Dosiervorrichtungen (21 - 24; 9, 11, 15, 17) zum Regulieren der jeweiligen Durchflußmengen. Neben der ersten Druckluftversorgungseinrichtung B beinhaltet dieses vorteilhafte Ausführungsbeispiel eine weitere Druckluftversorgungseinrichtung C, die zur Erhöhung der Leistungsfähigkeit des Reinigungsgerätes zusätzlich zur Druckluftversorgungseinrichtung B zugeschaltet werden kann.The cleaning device according to the invention essentially comprises a water supply device 1, A, a pressure vessel 2 with one attached to it Filling device 3, a pressure increasing device 4, a spray device 27, several lines for carrying water, compressed air and / or mixture as well as several switching and / or dosing devices (21 - 24; 9, 11, 15, 17) for Regulate the respective flow rates. In addition to the first compressed air supply device B, this advantageous embodiment includes another Compressed air supply device C, to increase performance the cleaning device in addition to the compressed air supply device B can be switched on.

    Die Wasserversorgungseinrichtung 1, A umfaßt einen Wasserspeicher 1 und einen Wasseranschluß A. Des weiteren weist der Wasserspeicher 1 zwei Schalter 1a, 1b auf, die vorteilhafterweise als Schwimmschalter ausgeführt sind, und beim Überschreiten eines Wasserhöchststandes (Schalter 1a) bzw. eines Wassertiefstands (1b) schalten. Bei Überschreiten des Wasserhöchststandes schaltet der Schalter 1a die Wasserzufuhr zum Wasserspeicher 1 ab, indem der Wasseranschluß A verschlossen wird. Der Schalter 1b schaltet bei Unterschreiten eines Wassertiefstandes das Reinigungsgerät ab.The water supply device 1, A comprises a water reservoir 1 and one Water connection A. Furthermore, the water tank 1 has two switches 1a, 1b, which are advantageously designed as a float switch, and at Exceeding a water high (switch 1a) or a water low (1b) switch. If the maximum water level is exceeded, the Switch 1a the water supply to the water reservoir 1 by the water connection A is closed. Switch 1b switches when one falls below Water level from the cleaning device.

    Ferner beinhaltet die Wasserversorgungseinrichtung 1, A einen Feststoffabscheider 1d, der vorteilhafterweise im oberen Teil des Wasserspeichers 1 angeordnet ist, so daß der Wasserhöchststand im Wasserspeicher 1 unterhalb des Feststoffabscheiders 1d liegt. Der Feststoffabscheider 1d wird über eine Leitung von dem Überlauf 2b des Druckbehälters 2 gespeist und dient zur Rückgewinnung von feststofffreiem Wasser.Furthermore, the water supply device 1, A contains a solids separator 1d, which is advantageously arranged in the upper part of the water reservoir 1 is, so that the water level in the water reservoir 1 below the solids separator 1d lies. The solids separator 1d is connected via a line from the Overflow 2b of the pressure vessel 2 is fed and is used for the recovery of solids-free water.

    Der Druckbehälter 2, der zur Herstellung eines Gemisches aus Wasser und Festteilen und zur Bereitstellung dieses Gemisches unter Druck dient, weist an seinem unteren Ende eine Wassereinspritzung 2d und einen Auslaß 2e auf, während im oberen Teil eine Einfüllöffnung 2a, ein Überlauf 2b und ein Überdruckventil 2c angeordnet sind.The pressure vessel 2, which is used to produce a mixture of water and solid particles and is used to provide this mixture under pressure points at his lower end a water injection 2d and an outlet 2e while in the upper part a filling opening 2a, an overflow 2b and a pressure relief valve 2c are arranged.

    Direkt an der Einfüllöffnung 2a ist eine Befüllvorrichtung 3 in Form eines Siebaufsatzes vorgesehen. Der Siebaufsatz 3 umfaßt einen trichterförmigen Grundkörper, in dem ein Sieb angeordnet ist, um Festteile, wie z.B. Sande zu sieben, so daß die Festteile die gewünschte Korngröße aufweisen. Außerdem weist der Siebaufsatz 3 einen Wasseranschluß 3a und eine Rütteleinheit 3b auf. Der Wasseranschluß ist so ausgebildet, daß das in den Siebaufsatz 3 strömende Wasser die darin befindlichen Feststeile in eine leichte Rotation versetzt. Durch die Strömung des Wassers und/oder die Vibration, die durch die Rütteleinheit 3b erzeugt wird, wird das Befüllen des Druckwasserbehälters mit Festteilen erleichtert.A filling device 3 in the form of a screen attachment is located directly at the filling opening 2a intended. The screen attachment 3 comprises a funnel-shaped base body, in which a sieve is arranged to remove solid parts, e.g. Sands to seven, like this that the solid parts have the desired grain size. In addition, the screen attachment 3 a water connection 3a and a vibrating unit 3b. The water connection is designed so that the water flowing into the sieve attachment 3 fixed parts in it are set in a slight rotation. Through the current of water and / or the vibration generated by the vibrating unit 3b filling the pressure water tank with solid parts is made easier.

    Die Druckerhöhungseinrichtung 4, die über eine Leitung 4a direkt mit der Wasserversorgungseinrichtung 1, A verbunden ist, umfaßt im wesentlichen eine Pumpe 4c, der vorteilhafterweise ein Wasserfilter 4b vorgeschaltet ist. Neben der Zuleitung 4a weist die Pumpe 4c eine Ausgangsleitung 4d auf, bei der das durch die Pumpe 4c erzeugte Druckwasser ausgegeben wird. Ferner ist an der Pumpe 4c ein Anschluß für die Druckluftsteuerleitung 6 vorhanden, über den die zur Steuerung der Pumpe notwendige Druckluft anliegt. Durch die Druckluft, die an der Druckluftsteuerleitung 6 anliegt, wird die Pumpe 4c so gesteuert, daß der Wasserdruck am Pumpenausgang 4d um etwa 20% höher ist als der Luftdruck in der Druckluftsteuerleitung 6.The pressure increasing device 4, which is connected directly to the water supply device via a line 4a 1, A essentially comprises one Pump 4c, which is advantageously preceded by a water filter 4b. In addition to the Supply line 4a, the pump 4c has an output line 4d, through which the the pump 4c generated pressure water is output. Also on the pump 4c a connection for the compressed air control line 6 is available, via which the Control of the pump necessary compressed air is present. Because of the compressed air of the compressed air control line 6, the pump 4c is controlled so that the Water pressure at the pump outlet 4d is about 20% higher than the air pressure in the compressed air control line 6.

    Da die Druckluftsteuerleitung 6 direkt mit der Druckluftversorgungseinrichtung B verbunden ist, herrscht in der Druckluftsteuerleitung 6 der gleiche Luftdruck, wie in der Druckluftversorgungseinrichtung B.Since the compressed air control line 6 directly with the compressed air supply device B is connected, the same air pressure prevails in the compressed air control line 6, as in the compressed air supply device B.

    Der Pumpenausgang 4d ist zum einen über eine Leitung mit dem verschließbaren Wasseranschluß 3a der Befüllvorrichtung 3 verbunden. Zum anderen ist der Pumpenausgang 4d der Druckerhöhungseinrichtung 4 über die Wassereinspritzleitung 12 mit der Wassereinspritzung 2d des Druckbehälters 2 verbunden. Bei der gezeigten vorteilhaften Ausführungsform sind in der Wassereinspritzleitung 12 eine Dosiervorrichtung 11, ein Rückschlagventil RV und ein Manometer 13 vorgesehen. Über die Dosiervorrichtung 11 kann die Wassermenge, die über die Einspritzung 2d in den Druckbehälter 2 zugeführt wird, eingestellt werden. The pump outlet 4d is on the one hand connected to the closable via a line Water connection 3a of the filling device 3 connected. The other is Pump outlet 4d of the pressure booster 4 via the water injection line 12 connected to the water injection 2d of the pressure vessel 2. at the advantageous embodiment shown are in the water injection line 12 a metering device 11, a check valve RV and a pressure gauge 13 intended. About the metering device 11, the amount of water, the Injection 2d is fed into the pressure vessel 2 can be set.

    Darüber hinaus ist der Pumpenausgang 4d der Druckerhöhungseinrichtung 4 über die Wasserleitung 18 mit der Wasserschaltvorrichtung 22 verbunden. In der Wasserleitung 18 ist ebenfalls eine Dosiervorrichtung 17 und ein Rückschlagventil RV angeordnet.In addition, the pump outlet 4d of the pressure increasing device 4 connected to the water switching device 22 via the water line 18. In the Water pipe 18 is also a metering device 17 and a check valve RV arranged.

    Eine weitere Wasserzusetzleitung 16 ist parallel zur Wassereinspritzleitung 12 und zur Wasserleitung 18 am Pumpenausgang 4d der Druckerhöhungseinrichtung 4 angeschlossen. Auch diese Wasserzusetzleitung 16 weist eine Dosiervorrichtung 15 und ein Rückschlagventil RV auf. Das andere Ende der Wasserzusetzleitung 16 mündet in die Auslaß-Leitung 20, die sich vom Auslaß 2e des Druckbehälters 2 zur Gemisch-Schaltvorrichtung 23 erstreckt. Auf diese Weise ist es möglich, dem Gemisch, das aus dem Druckbehälter 2 zur Gemisch-Schaltvorrichtung 23 geführt wird, zusätzlich eine über die Dosiervorrichtung 15 einstellbare Menge an Wasser zuzusetzen.Another water supply line 16 is parallel to the water injection line 12 and to the water line 18 at the pump outlet 4d of the pressure booster 4 connected. This water supply line 16 also has a metering device 15 and a check valve RV on. The other end of the water supply line 16 opens into the outlet line 20, which extends from the outlet 2e of the Pressure vessel 2 extends to the mixture switching device 23. In this way it is possible to mix the mixture from the pressure vessel 2 to the mixture switching device 23 is guided, in addition one via the metering device 15 add adjustable amount of water.

    Um den Abfluß des Gemisches aus dem Druckbehälter 2 zu erleichtern, ist bei dem gezeigten Ausführungsbeispiel weiterhin eine Hilfsleitung 14 vorgesehen, die von der Wassereinspritzleitung 12 ausgeht und in der Nähe des Auslasses 2e des Druckbehälters 2 in die Auslaß-Leitung 20 einmündet. Der Querschnitt der Hilfsleitung 14 ist gegenüber den Querschnitten der Wassereinspritzleitung 12 und der Auslaß-Leitung 20 stark reduziert, so daß nur eine geringe Menge an Wasser durch die Hilfsleitung 14 fließen kann, was jedoch den Ausfluß des Gemisches aus dem Druckbehälter 2 erleichtert. Auch die Hilfsleitung 14 weist ein Rückschlagventil RV auf.To facilitate the outflow of the mixture from the pressure vessel 2 is at an auxiliary line 14 is also provided in the exemplary embodiment shown, which starts from the water injection line 12 and in the vicinity of the outlet 2e of the pressure vessel 2 opens into the outlet line 20. The cross section of the Auxiliary line 14 is opposite the cross sections of the water injection line 12 and the outlet line 20 greatly reduced, so that only a small amount of Water can flow through the auxiliary line 14, however, this reduces the outflow of the mixture relieved from the pressure vessel 2. The auxiliary line 14 also has a Check valve RV on.

    Neben der Wasserschaltvorrichtung 22 und der Gemisch-Schaltvorrichtung 23 weist das erfindungsgemäße Reinigungsgerät eine Druckluftschaltvorrichtung 21 auf. Diese Druckluftschaltvorrichtung 21 ist über die Druckluftleitung 19 mit der zweiten Druckluftversorgungseinrichtung C sowie über die Verbindungsleitungen 8 und 5 mit der ersten Druckluftversorgungseinrichtung B verbunden. In der Verbindungsleitung 8 ist ebenfalls eine Dosiervorrichtung 9 und ein Rückschlagventil RV vorgesehen. Die Druckluftleitung 19 kann darüber hinaus ein Manomoter 10 aufweisen.In addition to the water switching device 22 and the mixture switching device 23 the cleaning device according to the invention has a compressed air switching device 21 on. This compressed air switching device 21 is via the compressed air line 19 with the second compressed air supply device C and via the connecting lines 8 and 5 connected to the first compressed air supply device B. In the connecting line 8 is also a metering device 9 and a check valve RV provided. The compressed air line 19 can also be a Have manomotors 10.

    Zusätzlich zu den Schaltvorrichtungen 21 - 23 ist eine Schnellablaß-Schaltvorrichtung 24 vorgesehen, die mit einer Schnellablaßleitung 25 verbunden ist. Die Schaltvorrichtungen 21 - 24 sind im gezeigten Ausführungsbeispiel als Ein-/Aus-Schalter ausgeführt und sind vorteilhafterweise so hintereinander angeordnet, daß die Druckluftschaltvorrichtung 21 der Wasserschaltvorrichtung 22 vorgeschaltet ist, während die Wasserschaltvorrichtung 22 wiederum der Gemisch-Schaltvorrichtung 23 vorgeschaltet ist. Auf diese Weise kann bei geöffneter Druckluftschaltvorrichtung 21 dem Druckluftstrom durch Öffnen der Wasserschaltvorrichtung 22 Wasser bzw. durch Öffnen der Gemisch-Schaltvorrichtung 23 ein Gemisch zugesetzt werden, ohne daß Festteile Beschädigungen an der Druckluftschaltvorrichtung 21 oder der Wasserschaltvorrichtung 22 verursachen könnten. Anschließend an die Gemisch-Schaltvorrichtung 23 ist die Schnellablaß-Schaltvorrichtung 24 angeordnet. An die Schnellablaß-Schaltvorrichtung 24 schließt sich die Sprühleitung 26 an, an deren Ende sich die Sprühvorrichung 27 befindet. Je nachdem, welche der Schaltvorrichtungen 21 - 23 geöffnet oder geschlossen ist, wird somit Druckluft und/oder Wasser und/oder Gemisch über die Sprühleitung 26 an die Sprühvorrichtung 27 abgegeben. Die Schnellablaß-Schaltvorrichtung 24 ist so ausgeführt, daß bei geöffneter Schnellablaß-Schaltvorrichtung 24 der Zugang zur Schnellablaßleitung 25 geöffnet ist, und somit Druckluft, Wasser und/oder Gemisch über die Schnellablaßleitung 25 abgelassen werden können. Da der Durchmesser der Schnellablaßleitung 25 wesentlich größer ist als der Durchmesser der Sprühleitung 26, ist damit ein schnelles Abschalten des Reinigungsgerätes gewährleistet.In addition to the switching devices 21-23 is a quick release switching device 24 provided, which is connected to a quick drain line 25 is. The switching devices 21-24 are in the exemplary embodiment shown designed as an on / off switch and are advantageously one behind the other arranged that the compressed air switching device 21 of the water switching device 22 is connected upstream, while the water switching device 22 in turn the Mixture switching device 23 is connected upstream. This way, when open Compressed air switching device 21 the compressed air flow by opening the water switching device 22 water or by opening the mixture switching device 23 a mixture can be added without damage to the solid parts on the compressed air switching device 21 or the water switching device 22 could cause. Subsequent to the mixture switching device 23, the quick-release switching device 24 is arranged. To the quick release switch 24 follows the spray line 26, at the end of which the Sprühvorrichung 27 is located. Depending on which of the switching devices 21 - 23 is opened or closed, compressed air and / or water and / or Mixture dispensed via the spray line 26 to the spray device 27. The Quick-release switching device 24 is designed so that when open Quick drain switch 24 of access to the quick drain line 25 is open is, and thus compressed air, water and / or mixture via the quick drain line 25 can be drained. Because the diameter of the quick drain line 25 is substantially larger than the diameter of the spray line 26, is therefore a ensures that the cleaning device is switched off quickly.

    Die Schaltvorrichtungen 21 - 24 sowie die Dosiervorrichtungen von 9, 11, 15 und 17 sind bei dem gezeigten Ausführungsbeispiel vorteilhafterweise als elektropneumatische Ventile ausgeführt. Dadurch ist es möglich, daß sie beispielsweise auch durch eine Fernbedienung, die sich vorteilhafterweise an der Sprühvorrichtung 27 befinden kann, bedient werden können. Die zur Betätigung der elektropneumatischen Ventile notwendige Druckluft wird von der Druckluftversorgungseinrichtung B bereitgestellt, wobei vorteilhafterweise ein Druckluftbehälter 7a als Puffer zwischengeschaltet ist, damit eine ständige Versorgung der elektropneumatischen Ventile mit Druckluft sichergestellt ist.The switching devices 21-24 and the metering devices of 9, 11, 15 and 17 are advantageously in the embodiment shown as electropneumatic Valves executed. This makes it possible for them, for example also by a remote control, which is advantageously on the spray device 27 can be operated. The one for actuating the electropneumatic Valves necessary compressed air is supplied by the compressed air supply device B provided, advantageously a compressed air tank 7a is interposed as a buffer, so that a constant supply of the electropneumatic Valves with compressed air is ensured.

    Das erfindungsgemäße Reinigungsgerät nach dem vorliegenden Ausführungsbeispiel wird in der folgenden Weise betrieben:The cleaning device according to the invention according to the present embodiment is operated in the following way:

    Zunächst wird der Druckluftbehälter 2 mit Festteilen, d. h. körnige Materialien, die lehmfrei und schwerer als Wasser sind sowie eine Korngrößes bis max. 3 mm besitzen, z. B. Sand oder dgl., und Wasser gefüllt. Dabei werden die Festteile und/oder Wasser über den Siebaufsatz 3 in die Einfüllöffnung 2a eingefüllt. Durch das höhere Gewicht der Festteile sinken diese beim Befüllen des Druckbehälters 2 nach unten ab, während das leichtere Wasser am geöffneten Überlauf 2b entweichen kann. Da der Überlauf 2b mit dem Feststoffabscheider 1d verbunden ist, wird das überschüssige Wasser im Feststoffabscheider 1d von den Festteilen getrennt und dann der Wasserversorgungseinrichtung 1, A zur Verfügung gestellt. Der Druckbehälter 2 wird solange mit Festteilen und/oder Wasser gefüllt, bis die Festteile bis an den Überlauf 2b heranreichen. Dann wird der Überlauf 2b verschlossen und der Rest des Druckwasserbehälters wird bis zur Einfüllöffnung 2a mit Wasser aufgefüllt. Diese Restauffüllung mit Wasser kann über die Einspritzung 2d oder über die Einfüllöffnung 2a erfolgen. Die Auffüllung mit Wasser über die Einspritzung 2d hat den Vorteil, daß die Festteile im unteren Bereich durch das eindringende Wasser etwas gelockert werden. Ist der Druckbehälter 2 vollständig mit Wasser gefüllt, so wird die Einfüllöffnung 2a verschlossen und der Druckbehälter 2 wird über die Einspritzung 2d unter Druck gesetzt. First, the compressed air tank 2 with solid parts, i.e. H. granular materials, which are clay-free and heavier than water and have a grain size of up to max. 3 mm own, e.g. B. sand or the like., And water filled. The fixed parts and / or water is poured into the filling opening 2a via the sieve attachment 3. Due to the higher weight of the fixed parts, they decrease when the pressure vessel is filled 2 down while the lighter water at the open overflow 2b can escape. Since the overflow 2b connected to the solid separator 1d is, the excess water in the solid separator 1d from the solid parts separated and then the water supply device 1, A available posed. The pressure vessel 2 is filled with solid parts and / or water as long as until the solid parts reach the overflow 2b. Then the overflow 2b closed and the rest of the pressurized water tank is up to the filling opening 2a filled up with water. This residual filling with water can over injection 2d or via fill opening 2a. The padding with Water via the injection 2d has the advantage that the solid parts in the lower Area can be loosened somewhat by the penetrating water. Is the pressure vessel 2 completely filled with water, the filling opening 2a is closed and the pressure vessel 2 is pressurized via the injection 2d set.

    Die Pumpe 4c wird über die Druckluftsteuerleitung 6 direkt durch die Druckluftversorgungseinrichtung B so gesteuert, daß der Wasserdruck bzw. der Druck im Druckbehälter 2 etwa 0,2 bis 0,8 bar höher ist als der angeschlossene Luftdruck.The pump 4c is directly via the compressed air control line 6 through the compressed air supply device B controlled so that the water pressure or the pressure in Pressure vessel 2 is approximately 0.2 to 0.8 bar higher than the connected air pressure.

    Die Reinigung von Oberflächen kann mit dem erfindungsgemäßen Reinigungsgerät nun auf folgende Weise erfolgen. Zum einen kann die Reinigung ausschließlich mit Druckluft durchgeführt werden. Dazu wird die Druckluftschaltvorrichtung 21 geöffnet, während die übrigen Schaltvorrichtungen 22 - 24 geschlossen sind. Damit wird über die Leitungen 5, 8 und 19 Druckluft von der ersten Druckluftversorgungseinrichtung B zur Sprühvorrichtung 27 geleitet. Die Menge an Druckluft kann durch das Einstellen der Dosiervorrichtung 9 geregelt werden. Ist eine besonders kraftvolle Reinigung mit Druckluft gewünscht, so kann zusätzlich die zweite Druckluftversorgungseinrichtung C angeschlossen werden und die Dosiervorrichtung 9 vollständig geöffnet werden.Surfaces can be cleaned with the cleaning device according to the invention now do the following. For one thing, cleaning can only be carried out with compressed air. For this, the compressed air switching device 21 open while the other switching devices 22-24 are closed are. Compressed air is thus supplied from the first via lines 5, 8 and 19 Compressed air supply device B directed to the spray device 27. The amount of compressed air can be regulated by adjusting the metering device 9. If particularly powerful cleaning with compressed air is required, this can also be done the second compressed air supply device C can be connected and the metering device 9 are opened completely.

    Eine zweite Reinigungsmöglichkeit besteht darin, zu dem Druckluftstrom Wasser zuzusetzen. Dazu wird zusätzlich die Schaltvorrichtung 22 geöffnet. Die Menge an zugesetztem Wasser kann durch die Dosiervorrichtung 17 eingestellt werden. Da der Wasserdruck im Reinigungsgerät durch die Druckerhöhungseinrichtung 4 größer ist als der Druck der Druckluft, wird das zugesetzte Wasser mit Überdruck dem Druckluftstrom beigegeben. Dadurch wird sichergestellt, daß die an der Dosiervorrichtung 17 eingestellte Menge eingehalten wird.A second cleaning option is to add water to the compressed air flow add. For this purpose, the switching device 22 is additionally opened. The amount added water can be adjusted by the metering device 17. Since the water pressure in the cleaning device by the pressure increasing device 4 is greater than the pressure of the compressed air, the added water with overpressure added to the compressed air flow. This ensures that the on the dosing device 17 set amount is observed.

    Eine weitere Möglickeit der Reinigung besteht darin, dem Druckluftstrom ein Gemisch aus Wasser und Festteilen zuzusetzen. Dazu wird zusätzlich zur Druckluftschaltvorrichtung 21 die Gemisch-Schaltvorrichtung 23 geöffnet, während die Schaltvorrichtungen 22 und 24 geschlossen werden. Damit wird, ebenfalls mit Überdruck, das aus dem Druckbehälter 2 kommende Gemisch, das den Druckbehälter 2 über den Auslaß 2e verläßt, in den Druckluftstrom eingegeben. Durch die Wassereinspritzung 2d wird dem Druckbehälter 2 gleichzeitig ständig Wasser zugesetzt, so daß der durch die Druckerhöhungseinrichtung 4 aufgebaute Druck im Druckbehälter 2 beibehalten wird. Die gleiche Menge an Wasser, die dem Druckbehälter 2 zugeführt wird, tritt folglich als Gemisch am Auslaß 2e aus.Another way of cleaning is to enter the compressed air flow Add mixture of water and solid particles. In addition to Compressed air switching device 21 opened the mixture switching device 23 while the switching devices 22 and 24 are closed. With that, too with overpressure, the mixture coming from the pressure vessel 2, the Leaves pressure vessel 2 through outlet 2e, entered into the compressed air flow. Due to the water injection 2d, the pressure vessel 2 is simultaneously continuous Water added so that the built up by the pressure increasing device 4 Pressure in pressure vessel 2 is maintained. The same amount of water that is supplied to the pressure vessel 2, thus emerges as a mixture at the outlet 2e.

    Falls es erwünscht ist, das Mischungsverhältnis von Wasser zu Festteilen, das üblicherweise bei 20:80 Vol. Anteilen liegt, zu verändern, so ist es über die Dosiervorrichtung 15 möglich, zusätzliches Wasser zur Auslaß-Leitung zuzusetzen. Dies ist besonders für eine schonende Reinigung vorteilhaft.If it is desired to mix the ratio of water to solids that is usually 20:80 vol. proportions, so it is via the metering device 15 possible to add additional water to the outlet pipe. This is particularly advantageous for gentle cleaning.

    Über die gegenüber der Wassereinspritzleitung 12 und der Auslaß-Leitung 20 in ihrem Querschnitt klein dimensionierte Hilfsleitung 14 ist es möglich, daß ein kleiner Teil des Wassers direkt von der Wassereinspritzleitung 12 in die Auslaß-Leitung 20 geleitet wird. Dies ist insbesondere dann vorteilhaft, wenn beispielsweise durch Festteile mit einer etwas großen Körnung der Abstransport aus dem Auslaß 2e etwas behindert ist. Dadurch steigt der Druck vor der Einspritzung 2d etwas an, was am Manometer 13 abgelesen werden kann, so daß dann automatisch über die Hilfsleitung 14 ein Teil des Wassers umgeleitet wird. Dieser Teil des Wassers, der in der Nähe des Auslasses 2e in die Auslaß-Leitung 20 eingeführt wird, erleichtert auch den Abtransport der Festteile.Via the opposite the water injection line 12 and the outlet line 20 in their cross-section small dimensioned auxiliary line 14, it is possible that a small part of the water directly from the water injection line 12 into the outlet line 20 is directed. This is particularly advantageous if, for example due to solid parts with a somewhat large grain, the removal from the Outlet 2e is somewhat obstructed. This increases the pressure before the injection 2d something that can be read on the manometer 13, so that then automatically a portion of the water is diverted via the auxiliary line 14. this part of water introduced into the outlet pipe 20 in the vicinity of the outlet 2e will also facilitate the removal of the solid parts.

    Durch die Wasserversorgungseinrichtung 1, A, mit dem Wasserspeicher 1 und dem Wasseranschluß A ist gewährleistet, daß während des gesamten Reinigungsvorgangs eine gleichbleibende Wasserversorgung der Druckerhöhungseinrichtung 4 gegeben ist. Da durch die Schalter 1a und 1b des Wasserspeichers 1 ein Wasserhöchststand und Wassertiefstand vorgebenen ist, ist die Wasserversorgung der Pumpe 4c innerhalb dieser Grenzen konstant. Der Wasserspeicher 1 kann somit Schwankungen in der Wasserversorgung über den Wasseranschluß A ausgleichen. Durch die konstante Wasserversorgung von der Wasserversorgungseinrichtung 1, A und die direkte Steuerung der Pumpe 4c mit Druckluft über die Druckluftsteuerleitung 6 wird automatisch ein konstant höherer Wasserdruck in Bezug auf den Luftdruck gewährleistet, ohne daß auf eine variierende Wasserversorgung mit Anpassung der Steuerdruckluft reagiert werden müßte. Through the water supply device 1, A, with the water reservoir 1 and the water connection A ensures that during the entire cleaning process a constant water supply to the pressure booster 4 is given. Since by the switches 1 a and 1 b of the water reservoir 1 Maximum water level and low water level is specified, the water supply the pump 4c constant within these limits. The water reservoir 1 can therefore fluctuations in the water supply via the water connection A compensate. Due to the constant water supply from the water supply facility 1, A and direct control of the pump 4c with compressed air A constantly higher water pressure is automatically generated via the compressed air control line 6 guaranteed in terms of air pressure without changing Water supply would have to be reacted to by adapting the control compressed air.

    Aufgrund des konstanten Druckverhältnisses ist die Dosierung von Wasser bzw. Gemisch in den Druckluftstrom sehr genau möglich.Due to the constant pressure ratio, the dosing of water or Mixture in the compressed air flow is very possible.

    Die Schnellablaßschaltvorrichtung 24 ermöglicht es weiterhin, das Reinigungsgerät so abzuschalten, daß innerhalb kürzester Zeit der Sprühvorgang beendet wird. Werden nämlich die Schaltvorrichtungen 21 - 23 geschlossen, so verbleibt in der u. U. sehr langen Sprühleitung 26 ein Rest des Sprühmediums, das u. U. zu sehr langen Nachsprühzeiten führen kann. Wird hier die Schnellablaß-Schaltvorrichtung 24 geöffnet, so kann das in der Sprühleitung 26 befindliche Medium durch die Schnellablaßleitung 25, die einen wesentlich größeren Querschnitt als die Sprühleitung 26 aufweist, sehr schnell entweichen. Damit kann bei Bedarf ein sehr schnelles Unterbrechen des Sprühvorgangs erreicht werden.The quick release switch 24 also allows the cleaning device switch off so that the spraying process ends within a very short time becomes. If the switching devices 21-23 are closed, then remains in the u. U. very long spray line 26 a rest of the spray medium, which u. U. can lead to very long post-spraying times. Here is the quick release switch 24 opened, so that located in the spray line 26 Medium through the quick drain line 25, which has a much larger cross section than the spray line 26 has, escape very quickly. So that can if necessary, a very quick interruption of the spraying process can be achieved.

    Gegenüber dem üblichen Quetschen" der Sprühleitung 26, z. B. bei einem Schlauch, zur Erzielung einer schnellen Unterbrechung, hat die Schnellabschaltvorrichtung auch den Vorteil, daß der Druck in der Sprühleitung 26 sehr schnell abgebaut wird und somit Gefahrenquellen, z. B. Platzen des Schlauches (Sprühleitung 26), vermieden werden.Compared to the usual squeezing "of the spray line 26, e.g. Hose to achieve a quick break has the quick cut-off device also the advantage that the pressure in the spray line 26 very quickly is degraded and thus sources of danger, e.g. B. burst hose (Spray line 26) can be avoided.

    Claims (16)

    1. Cleaning apparatus for the cleaning of surfaces including
      a pressure container (2) for receiving water and solid particles and storing them under pressure,
      a water supply device (1, A),
      a compressed air supply device (B)
      a pressure increasing device (4), which is connected to the water supply device (1, A) and increases the pressure of the supplied water,
      a spray device (27) for discharging compressed air and/or water and/or mixture onto the surface to be cleaned,
      a plurality of conduits for conducting water, compressed air and/or solid particles
      a plurality of switching and/or metering devices (9, 11, 15, 17; 21-24), which are provided in the conduits to control the flows of water, compressed air and/or mixture,
      at least one water injection conduit (12) between the pressure increasing device (4) and pressure container (2),
      at least one outlet conduit (20) between the pressure container (2) and mixture switching device (23),
      at least one water conduit (18) between the pressure increasing device (4) and water switching device (22),
      at least one compressed air conduit (19) between the compressed air supply (B) and compressed air switching device (21) and
      at least one spray conduit (26) is provided between the switching devices (21-23) and the spray device (27),
      whereby the switching devices (21-23) have different switching states, in which compressed air and/or water and/or mixture is correspondingly discharged at the spray device (27), the mixture being discharged through an outlet opening (2e) in the pressure container (2) via the outlet conduit (20) and the mixture switching device (23) to the spray device (27) whilst water is supplied simultaneously via the water injection conduit (12) and a water injection device (2d) from the pressure increasing device (4) into the pressure container (2) and the water supply device (1, A) has at lest one water connection (A), characterised in that the water supply device further has a water provision unit (1), which is so constructed that a constant water supply is obtained, including a safety switch (1b), whereby the safety switch (1b) switches off the cleaning apparatus when the pressure increasing device (4) is no longer adequately supplied with water by the water supply device (1, A).
    2. Cleaning apparatus as claimed in claim, characterised in that the water provision unit (1, A) includes a water storage container (1), in which the safety switch (1b) is constructed in the form of a float switch, which switches when the water level falls below a predetermined value.
    3. Cleaning apparatus as claimed in claim 2. characterised in that the water storage container (1) further includes an overflow switch (1a), which stops the water supply from the water connection (A), when a maximum water level has been achieved.
    4. Cleaning apparatus claimed in one of claims 2 or 3, characterised in that the water storage container (1) includes a solid material separator (1d), which is connected via a conduit to a overflow opening (2b) in the pressure container (2) and is supplied from there with water.
    5. Cleaning apparatus as claimed in one of the preceding claims, characterised in that the pressure increasing device (4) is directly connected via compressed air control conduit (6) to the compressed air supply unit (B) and is controlled by the applied compressed air.
    6. Cleaning apparatus as claimed in one of the preceding claims, characterised in that provided between the outlet conduit (20) and the pressure increasing device (4) there is a water addition conduit (16), through which water may additionally be added to the mixture.
    7. Cleaning apparatus as claimed in one of the preceding claims, characterised in that disposed in the water injection conduit (12) and/or the water addition conduit (16) and/or the water conduit (18) there are metering devices (11, 15, 17), by means of which the volumes passing through may be controlled.
    8. Cleaning apparatus as claimed in one of the preceding claims, characterised in that the metering devices (11, 15, 17) have apertured discs with bores of different sizes, with which the flow volume may be adjusted in a precisely defined manner, the pressure drop across the metering devices (11, 15, 17) being limited to ca. 0.8 bar.
    9. Cleaning apparatus claimed in one of the preceding claims, characterised in that a second compressed air supply device (C) is provided, which may be connected to the compressed air conduit (19) in parallel with a first compressed air supply device (B) and thus increases the compressed air output, when required.
    10. Cleaning apparatus claimed in one of the preceding claims, characterised in that provided between the water injection conduit (12) and the outlet conduit (20) there is an auxiliary conduit (14), the cross section of which is substantially smaller with respect to the water injection conduit (12) and the outlet conduit (20).
    11. Cleaning apparatus as claimed in one of the preceding claims, characterised in that provided between the pressure increasing device (4) and a closable water connection (3 a) on a filling device (3) of the pressure container (2) there is a conduit, through which water can be conducted to the filling device (3) when the water connection is open.
    12. Cleaning apparatus as claimed in one of the preceding claims, characterised in that the switching and/or metering devices (11, 15, 17; 21-24) include electro-pneumatic valves, which are connected to the first compressed air supply device (B) via a connection (7b) provided with a compressed air store (7a) and are actuated by means of compressed air.
    13. A method of cleaning surfaces with compressed air and/or water and/or a water-solid material mixture, particularly a water-sand mixture, in which the mixture is produced in a pressure container and is forced out of the pressure container by the injection of water into the pressure container (2) and conducted to a switching device (23), the pressure of the supplied water being provided by a pressure increasing device (4), and in which compressed air and the pressurised water provided by the pressure increasing device (4) is available at further switching devices (21, 22) and a selection is made at the switching devices (21-23) whether the cleaning is performed only with compressed air, water or a mixture or combination of them, characterised in that the water supply to the pressure increasing device (4) is so performed that the water supply is constant and is automatically monitored so that the cleaning apparatus switches off when the pressure increasing device (4) is no longer sufficiently supplied with water by the water supply device (1A).
    14. A method as claimed in claim 13, characterised in that the pressure of the water produced by the pressure increasing device (4) is automatically adjusted to a value which is ca. 20% above that of the compressed air.
    15. A method as claimed in claim 13 or 14, characterised in that the outflow of the mixture from the pressure container (2) is facilitated by a small addition of water shortly after the outlet (2e).
    16. A method as claimed in one of claims (13-15) characterised in that the amounts of compressed air, water and mixture may be precisely adjusted.
    EP00104095A 1999-03-10 2000-02-28 Dispositif et procédé de nettoyage Expired - Lifetime EP1034891B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19910563A DE19910563A1 (en) 1999-03-10 1999-03-10 Cleaning device and method
    DE19910563 1999-03-10

    Publications (3)

    Publication Number Publication Date
    EP1034891A2 EP1034891A2 (en) 2000-09-13
    EP1034891A3 EP1034891A3 (en) 2002-10-16
    EP1034891B1 true EP1034891B1 (en) 2004-11-24

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    ID=7900403

    Family Applications (1)

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    EP00104095A Expired - Lifetime EP1034891B1 (en) 1999-03-10 2000-02-28 Dispositif et procédé de nettoyage

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    EP (1) EP1034891B1 (en)
    AT (1) ATE283146T1 (en)
    DE (2) DE19910563A1 (en)
    ES (1) ES2232338T3 (en)
    PT (1) PT1034891E (en)

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    GB2382317B (en) * 2001-11-22 2004-05-12 Quill Internat Ind Plc Abrasive blasting apparatus
    SG115439A1 (en) * 2001-12-28 2005-10-28 Jetsis Int Pte Ltd Method and apparatus for abrasive recycling and waste separation system
    GB0200372D0 (en) * 2002-01-08 2002-02-20 Aquablast Ltd Removing surface coatings and contamination
    DE102005010781A1 (en) * 2005-02-25 2006-08-31 Alfred Kärcher Gmbh & Co. Kg Sand blaster for cleaning different surfaces includes metering device for granules and a control unit with adjustable throttle valve upstream of inlet chamber to adapt gas flow to type of surface being cleaned
    EP1859901A1 (en) * 2006-05-23 2007-11-28 ANT Applied New Technologies AG Device for abrasive liquid suspension blasting
    GB0612944D0 (en) * 2006-06-29 2006-08-09 Bhr Group Ltd Water jet cutting apparatus
    DE102009043697A1 (en) 2009-10-01 2011-04-07 Alstom Technology Ltd. Method for machining workpieces by means of a abrasive-containing water jet emerging from a nozzle under high pressure, water-jet system for carrying out the method and application of the method
    NL1037571C2 (en) * 2009-12-18 2011-06-21 Lasbedrijf Vink B V SYSTEM FOR RADIATING OBJECTS WITH A MIXTURE OF LIQUID AND ABRASIVE.
    CN108857915B (en) * 2018-09-29 2023-07-18 广东水拓工程科技有限公司 Wet-type sand blasting system

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    GB2077158A (en) * 1980-06-07 1981-12-16 Wood Group Structural Coatings Wet grit blasting
    DE3473078D1 (en) * 1984-01-26 1988-09-01 Schmutz Gmbh Ernst Process and device for cleaning parts of plants which are contaminated by radioactivity
    EP0408609A1 (en) * 1988-03-02 1991-01-23 Cleaning Technology Limited Abrasive cleaning or cutting
    US5283991A (en) * 1992-09-08 1994-02-08 Josef Keizers Sandblasting method and a moist-sand blasting apparatus
    DE19623024A1 (en) * 1996-06-08 1997-12-11 Josef Bauer Wet jet plant

    Also Published As

    Publication number Publication date
    DE19910563A1 (en) 2000-09-14
    EP1034891A3 (en) 2002-10-16
    ES2232338T3 (en) 2005-06-01
    DE50008716D1 (en) 2004-12-30
    PT1034891E (en) 2005-03-31
    EP1034891A2 (en) 2000-09-13
    ATE283146T1 (en) 2004-12-15

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