EP0332090B1 - Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water - Google Patents

Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water Download PDF

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Publication number
EP0332090B1
EP0332090B1 EP19890103819 EP89103819A EP0332090B1 EP 0332090 B1 EP0332090 B1 EP 0332090B1 EP 19890103819 EP19890103819 EP 19890103819 EP 89103819 A EP89103819 A EP 89103819A EP 0332090 B1 EP0332090 B1 EP 0332090B1
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EP
European Patent Office
Prior art keywords
pressure
negative
container
outlet
pressure container
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
EP19890103819
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German (de)
French (fr)
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EP0332090A3 (en
EP0332090A2 (en
Inventor
Horst Kauffeldt
Thomas Kauffeldt
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Individual
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Individual
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Publication of EP0332090A2 publication Critical patent/EP0332090A2/en
Publication of EP0332090A3 publication Critical patent/EP0332090A3/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A47L5/38—Built-in suction cleaner installations, i.e. with fixed tube system to which, at different stations, hoses can be connected
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/2931—Diverse fluid containing pressure systems
    • Y10T137/3109—Liquid filling by evacuating container

Definitions

  • the invention relates to a device for suction and removal of a liquid containing pollutants, in particular dirty water, with the features from the preamble of claim 1 or 10 .
  • Such devices are known and for example in DE-PS 30 32503 and DE-OS 35 22nd 199.
  • a disadvantage of the known device is that continuous operation during the suction of the liquids is not possible because the vacuum container has to be emptied regularly, the suction process having to be interrupted because the vacuum container has to be ventilated for emptying.
  • the object underlying the invention was to design a device of the type specified above so that the suction of the liquid containing pollutants does not have to be interrupted when the vacuum container is filled, which can be of great importance especially when suctioning large quantities of liquid .
  • the basic idea of the invention is to remedy the difficulty of emptying the vacuum container against the air pressure behind the outlet by maintaining the outflow of the liquid through the outlet at least for a predetermined period of time even when the air pressure is in the vacuum tank by taking care of it that the outlet pressure given by the sum of the hydrostatic pressure of the liquid and the air pressure in the vacuum container is greater than or equal to the air back pressure prevailing behind the outlet, so that a pressure equalization between the area in front of the outlet and the area behind the outlet of the vacuum tank is carried out .
  • the pressure difference between the interior of the negative pressure and the exterior is compensated for by an additional water column, the hydrostatic pressure of which corresponds exactly to the pressure difference that occurs.
  • the device must have a height that corresponds at least to the required height of the water column. Given the magnitude of the suction blowers and vacuum chambers used and the vacuum thus generated in the vacuum container in the order of 10 to 20 kPa, the height of the required water column is in the order of 1 to 2 m.
  • the pressure compensation is established in that the vacuum container is followed by a second container in which a vacuum is generated for certain periods of time allows the liquid to be removed from the vacuum container itself, while the container is placed under atmospheric pressure within other periods, so that the liquid can be removed from the second vacuum container during these periods.
  • the second vacuum tank thus serves as a buffer tank for the removal of the dirty water from the first vacuum tank.
  • the control of the pressure changes in the second vacuum container can either be dependent on the fill level, but it can also be made particularly dependent on the greater pressure fluctuations occurring in the vacuum container itself due to the technique of suction.
  • the liquid containing harmful substances can be sucked off from an object by placing the end of the supply hose on the object, possibly with the interposition of a suction adapter.
  • the inlet opening increases and more air flows in.
  • a quasi-continuous operation is possible in that the device for emptying the vacuum container does not have to be switched off and the vacuum container is emptied via the additional container in the naturally occurring operating phases, in which a lower one takes place in the first vacuum container There is negative pressure.
  • the device shown in FIGS. 1 and 2 is primarily intended for suction and removal of a liquid containing pollutants, for example, dirty water, inside buildings, for example apartments, offices, hospitals, etc., it being assumed that somewhere near the dirty water accumulation there is a functional drain, for example in the form of a toilet.
  • pollutants for example, dirty water
  • buildings for example apartments, offices, hospitals, etc.
  • a functional drain for example in the form of a toilet.
  • the device has a base frame 10 which can be moved on wheels 10.1.
  • a vacuum container 1 is arranged on the base frame 10 and is sealed on its upper side with a lid 1.1.
  • Two vacuum connections 1.2 and 1.3 are led through the cover 1.1, each of which is connected to a suction blower 2 or 3 of known design arranged on the cover 1.1.
  • check valves 1.4 and 1.5 are arranged, which are designed as ball valves and ensure that even with a rapid rise in the water level within the vacuum chamber, no water can be sucked in by the suction fans.
  • a suction mouthpiece of known design can be connected.
  • Spray nozzles 1.7 are also arranged within the interior in the vacuum container 1, to which fresh water or another cleaning liquid can be supplied in a manner not specifically shown for cleaning the interior in the vacuum container 1.
  • the vacuum container 1 opens in its lower part into two outlets 1.8 and 1.9, each of which is followed by a water standpipe 5.1 or 5.2 in the vertical direction.
  • the lower ends of the water level pipes 5.1 and 5.2 are led into the lower area of a collecting container 6, which is also arranged on the base frame 10.
  • the top of the collecting container 6 is closed with a removable cover 6.1.
  • the collecting container 6 On its underside, the collecting container 6 has an outlet tube 6.2 which extends into the container in a funnel shape and on the outside of which a sealing sleeve 6.3 is arranged.
  • a water discharge pipe 6.4 is screwed sealingly, which protrudes with its upper end into the interior of the collecting container, an inlet piece 6.5 being arranged telescopically at this upper end, thereby causing the inlet opening for the water discharge pipe inside of the interior of the collecting container 6 can be set to different heights.
  • two inward-opening check valves 6.6 are arranged in the lid 6.1 of the collecting container 6, which serve to equalize the pressure serve and should prevent the escape of possibly odor-polluting substances from the air from the collecting container 6.
  • spray nozzles 6.7 are also arranged in the collecting container 6, to which fresh water or another cleaning liquid can be supplied in a manner not specifically shown for cleaning the collecting container.
  • the device is arranged above a toilet facility that is used as a waste water drain.
  • the frame 10 is arranged above the toilet bowl 7 in such a way that the outlet pipe 6.2 of the collecting container 6 is led into the outlet opening 7.1 of the toilet bowl 7, the sealing sleeve 6.3 serving for sealing the outlet with respect to the inlet opening in the toilet bowl 7.
  • the part of the device comprising the collecting container 6 and the vacuum container 1 can be arranged on the base frame 10 in a manner that is not specifically shown and can be raised and lowered.
  • the toilet device shown also includes a cistern 8 attached to a wall 9.
  • the suction fans 2 and 3 are switched on, so that the air is sucked out of the interior of the vacuum container 1.
  • Water is then poured into the collecting container 6, in such an amount that, due to the negative pressure generated in the vacuum container 1, the water in the two water level pipes 5.1 and 5.2 rises until the water level of the water column has reached a height W1 at which an equilibrium state, which is explained in more detail below, is established.
  • the water is added to the collecting container 6 in such a way that the water level in the collecting container 6 is also at a level W2 which is above the connection opening of the water standpipes 5.1 and 5.2, but just below the inlet opening into the water discharge pipe 6.4.
  • the sum of the pressure prevailing in the vacuum tank 1 and the hydrostatic pressure of the water columns in the water level pipes 5.1 and 5.2 between heights W2 and W1 corresponds exactly to the external air pressure, the lower part of the water level pipes 5.1 and 5.2 together with the collecting tank 6 acts as a siphon.
  • the dirty water sucked in through the supply hose 4 as a result of the negative pressure in the negative pressure container 1 when the suction mouthpiece is attached enters the negative pressure container 1 so that the water level in the negative pressure container 1 increases.
  • the water level in the collecting tank 6 also rises and in the stationary state just as much water flows out of the collecting tank 6 as is supplied to the vacuum tank 1 via the overflow 6.5.
  • air can flow in through the supply hose 4, so that the pressure in the vacuum container rises and the water level W1 drops accordingly, but at most up to the height W2.
  • dirty water is sucked in again, the old state of equilibrium with the height W1 is restored immediately a.
  • the device can thus be operated continuously and the sucked-up dirty water from the vacuum chamber is discharged into the toilet device 7 during the entire operation.
  • FIGS. 1 and 2 shows a variant of the embodiment according to FIGS. 1 and 2.
  • the vacuum container 11 is closed with a lid 11.1 on which a suction blower 12 is arranged, which sucks the air out of the vacuum container 1 via a vacuum connection 11.2.
  • the vacuum container 11 has a suction connection 11.6 to which the supply hose 14 is connected.
  • the outlet 11.8 of the vacuum container 11 is connected to a collecting container 16 via a water standpipe 15, the inlet opening between the water standpipe 15 and the collecting container 16 being closable by a non-return flap 15.2.
  • Spray nozzles 11.7, 15.1 and 16.7 are arranged in the vacuum tank 11 and in the water standpipe 15 and in the collecting tank 16, to which fresh water can be supplied for cleaning.
  • the top of the collecting container 16 is closed with a removable cover 16.1.
  • the pressure equalization between the collecting container 16 and the outside space takes place via equalizing valves 16.6.
  • the outlet pipe 16.2 of the collecting container 16 is inserted sealingly into the outlet 7.1 of a toilet device 7 by means of a sleeve seal 16.3.
  • the principle of operation of the device according to FIG. 3 is the same as the principle of operation of the device according to FIGS. 1 and 2.
  • the water level W3 in Vacuum tank 11 or in the water standpipe 15 is set so that the above-mentioned equilibrium state between the atmospheric pressure on the one hand and the sum of the pressure in the vacuum tank 11 and the hydrostatic pressure of the water column in the water standpipe 15 is maintained during operation.
  • the check valve closes due to the external air pressure 12.2. With an increase in the water level in the vacuum container 11 by supplying dirty water via the supply hose 14, a corresponding amount of water flows out through the collecting container 16, so that the state of equilibrium is restored.
  • FIGS. 1 to 3 require a certain minimum height, since the length of the water standpipes 5.1, 5.2 and 15 must be selected so that water columns can be generated which generate a sufficient hydrostatic pressure corresponding to the selected vacuum in the vacuum container 1 or 11 .
  • a device for suction and discharge of dirty water is shown with a vacuum container 21 which is sealed on its top by a lid 21.1.
  • a vacuum connection 21.2 is passed through the cover and into the interior of the vacuum container 21, at the free end of which a ball valve 21.4 is arranged.
  • a suction blower 22 arranged on the cover 21.1 is connected to the interior of the vacuum container 21 via the vacuum connection 21.2.
  • In the upper part of the vacuum tank 21 also opens a suction port 21.6, to which a water supply hose 24 is connected.
  • the outlet opening 21.8 arranged at the bottom of the vacuum container 21 is connected via a check valve 21.3 to the upper part of a second vacuum container 26, which in turn has an outlet opening 26.1, which is connected to a dirty water discharge line 28 via a check valve 26.2.
  • the interior of the first vacuum container 21 is connected to the interior of the second vacuum container 26 via a bypass system 25.
  • the bypass system 25 has a branch 25.2 connected to the interior of the second vacuum container 26, which has a controllable 3/2-way valve 27 either with a branch 25.3 opening to the outside atmosphere or with a branch leading to the interior of the first vacuum container 21 25.1 is connectable.
  • FIG. 5 shows a possible embodiment of the controllable 3/2-way valve 27.
  • a piston-like valve disk 27.1 is slidably guided between two valve seats 27.2 and 27.3 in the branches 25.1 and 25.3 aligned with one another.
  • the valve plate 27.1 can be moved together with a guide rod 27.5 against the force of a compression spring 27.6.
  • the end of the compression spring facing away from the valve plate 27.1 is supported on a stop 27.4 through which the guide rod 27.5 is slidably guided.
  • the position of the stop 27.4 can be adjusted in a manner not shown, whereby the pretension of the compression spring 27.6 and thus the switching point of the valve can be adjusted.
  • valve plate 27.2 Under the influence of a strong negative pressure in branch 25.1, valve plate 27.2 can move from the position shown in FIG. 5 to the right until it abuts stop 27.3 and in this position connects branch 25.2 with branch 25.3 opening towards the atmosphere. If the negative pressure in branch 25.1 subsides, valve plate 27.1 finally moves again under the influence of the force of spring 27.6 to the left until it abuts stop 27.2 and the connection between branches 25.1 and 25.2 is thus restored.
  • the operation of the device according to FIGS. 4 and 5 is as follows: To extract dirty water, the suction fan 22 is switched on and the suction mouthpiece, not shown, is placed on the free end of the supply hose 24 on the object to be extracted. The action of the suction fan 22 creates a strong negative pressure in the vacuum container 21, by means of which, as shown above, the valve plate 27.1 is brought into abutment against the valve seat 27.3. In this position, the interior spaces of the two vacuum containers 21 and 26 are separated from one another and the interior space of the second vacuum container 26 is connected to the external atmosphere via the branches 25.2 and 25.3. The dirty water flows under the effect of the negative pressure into the first negative pressure container 21, where it can accumulate up to approximately the height W4.
  • a drain through the outlet 21.8 is initially not possible because the check valve 21.3 closes under the effect of the air pressure prevailing in the second vacuum container 26 and this closing pressure is not overcome by the hydrostatic pressure of the water column in the first vacuum container 21 because of the vacuum prevailing there.
  • the suction mouthpiece If the suction mouthpiece is placed back on the object to be vacuumed, it will be at the top described first state again in that the dirty water is sucked into the first vacuum container 21, from which it cannot drain and by the second vacuum container 26 can be emptied via the check valve 26.2.
  • the advantage of this device over other known suction devices is that the first vacuum chamber 21 never needs to be completely ventilated during operation and the suction fan 22 continues to run.
  • the changeover from the first to the second operating state only takes place by lifting off the suction mouthpiece, a process that occurs from time to time anyway when suctioning dirty water from the floor in the natural course of work.
  • appropriate level indicators which may emit alarm signals, that neither of the two vacuum containers 21 and 26 is filled beyond a certain level
  • the device shown in FIGS. 6, 6a and 7 differs from the device according to FIGS. 4 and 5 essentially in the design of the bypass system and the 3/2-way valve.
  • the suction fan 32 Arranged on the cover 31.1 of the first vacuum container 31 is the suction fan 32, which evacuates the interior of the first vacuum space 31 via the vacuum connection 31.2, which is provided with the ball valve 31.4.
  • the supply hose 34 is connected to the suction connection 31.6 of the vacuum chamber 31.
  • the outlet at the bottom of the first vacuum container 31 is connected via a check valve 31.3 to the interior of the second vacuum container 36, the outlet thereof 36.1 is connected to a waste water discharge line 38 via a check valve 36.2.
  • the interiors of the two vacuum containers 31 and 36 are connected to one another via a bypass system 35, which contains a 3/2-way valve 37.
  • the bypass system has a total of four branches.
  • the first branch 35.1 is connected to the interior in the upper part of the first vacuum container 31, while the second branch 35.2 is connected to the interior in the upper part of the second vacuum container 36.
  • the third branch 35.3 opens to the atmosphere and the fourth branch 35.4 is connected to the interior in the lower part of the first vacuum container 31. In operation, the latter part is filled with the collecting dirty water.
  • the design of the 3/2-way valve is shown in more detail in Fig. 7.
  • a valve piston 37.1 is slidably guided in the straight section of the branch 35.4.
  • the valve piston has two passages 37.2 and 37.3.
  • the two branches 35.1 and 35.2 can be connected to one another via the first passage 37.2, while the branch 35.3 can be connected to the branch 35.2 via the second passage 37.3.
  • the two branches 35.1 and 35.2 are separated from one another, while the branch 35.2 is connected via the connecting branch 35.5 to the branch 35.3 opening into the atmosphere.
  • the two branches 35.1 and 35.2 are connected to one another, while the connecting branch 35.5 is separated from the branch 35.3.
  • the valve piston 37.2 is guided in a sealing manner via ring seals 37.4, 37.5 and 37.6.
  • the operation of the device shown in FIGS. 6 and 7 is as follows: If, after starting up the suction blower 32 and placing a suction mouthpiece connected to the supply hose 34 on the object to be extracted, a strong negative pressure is created in the vacuum container 31, the external atmospheric pressure shifts the valve piston 37.1 into the position shown in FIG. 7.
  • the interiors of the two vacuum containers 31 and 36 are separated from one another and the interior of the second vacuum container 36 is connected to the outside atmosphere via the passage 37.3.
  • the dirty water flows into the first vacuum tank 31, in which it can collect approximately up to the water level W6, and any dirty water contained in the second vacuum tank 36 can flow out via the check valve 36.1.
  • the hydrostatic pressure of the accumulating liquid is sufficient at least from a certain water level in the negative pressure container 31 to move the valve piston 37.1 to the left into the other To move end position in which the two branches 35.1 and 35.2 and thus the interiors of the two vacuum containers 31 and 36 are connected to each other and the entry of air from the atmosphere into the second vacuum container 36 is prevented.
  • the dirty water flows through the check valve 31.3 from the first vacuum tank 31 into the second vacuum tank 36, in which it collects approximately up to the water level W7. Replacing the suction mouthpiece on the object causes the valve 37 to be reversed again and the above-mentioned first operating state begins again.
  • FIG. 6a a variant of this embodiment is shown in FIG. 6a, in which this is not the case.
  • the liquid-carrying branch 35.4 of the bypass system is not connected to the inside of the first vacuum container 31 on the underside of the first vacuum container, but is guided into the upper part of the first vacuum container 31, so that a liquid standpipe 35.6 connects to the branch 35.4, which up to the level of a liquid level W8 with a liquid, for example Water that is filled.
  • the valve 37 is designed in accordance with FIG. 7.
  • the switching point of the valve can be set by the amount of liquid in the liquid standpipe 35.6 that does not change.
  • the valve piston 37.1 is shifted from the right position in FIG. 7 to the left position when the sum of the hydrostatic pressure of the liquid column in the liquid standpipe 35.6 together with the pressure still prevailing in the vacuum container 31 is sufficient to close the piston 37.1 against the atmospheric pressure move.
  • the shift in the opposite direction takes place in the case of a stronger negative pressure due to the atmospheric pressure acting from outside.
  • a sealing piston 35.7 which is displaceable in the pipe and is seated on the liquid surface, is expediently arranged in order to prevent the liquid from splashing out in the event of greater pressure fluctuations.
  • corresponding level indicators emitting signals can be provided for the two vacuum containers.
  • valves instead of the 3/2-way valves shown in FIGS. 5 and 7, in particular electromagnetically controlled valves, which are controlled in a manner not shown by sensors which act on the one in the first vacuum container 31 Pressure and if necessary respond to the liquid levels in the two vacuum tanks.

Abstract

A liquid feed hose (24) is connected to a negative pressure container (21). Connected downstream of the outlet (21.8) of the negative pressure container (21) is an outlet device which allows the liquid to be discharged even under negative pressure. The outlet device has a second negative pressure container (26), into which the outlet (21.8) of the first negative pressure container (21) opens out via a non-return valve (21.3). The outlet (26.1) of the second negative pressure container (26) is connected via a non-return valve (26.2) to a discharge line (28). The two negative pressure containers are connected to each other via a bypass system (25) which contains an actuatable 3/2-way valve (27). The actuation takes place in dependence on the negative pressure in the first negative pressure container (21) in such a way that, in a first operating state, in which the bypass is blocked and the second negative pressure container (26) is under atmospheric pressure, the first negative pressure container (21) is filled and the second is emptied. In a second operating state, the bypass is open, both negative pressure containers (21, 26) are under the same pressure and the liquid flows from the first negative pressure container (21) into the second negative pressure container (26). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Absaugung und Abführung einer Schadstoffe enthaltenden Flüssigkeit, insbesondere von Schmutzwasser, mit den Merkmalen aus dem Oberbegriff des Patentanspruchs 1 bzw. 10.. Derartige Vorrichtungen sind bekannt und beispielsweise in DE-PS 30 32503 und DE-OS 35 22 199 beschrieben.The invention relates to a device for suction and removal of a liquid containing pollutants, in particular dirty water, with the features from the preamble of claim 1 or 10 .. Such devices are known and for example in DE-PS 30 32503 and DE-OS 35 22nd 199.

Ein Nachteil der bekannten Vorrichtung liegt darin, daß ein kontinuierlicher Betrieb beim Absaugen der Flüssigkeiten nicht möglich ist, weil der Unterdruckbehälter regelmäßig geleert werden muß, wobei der Absaugvorgang unterbrochen werden muß, da der Unterdruckbehälter zum Entleeren belüftet werden muß.A disadvantage of the known device is that continuous operation during the suction of the liquids is not possible because the vacuum container has to be emptied regularly, the suction process having to be interrupted because the vacuum container has to be ventilated for emptying.

Die der Erfindung zugrunde liegende Aufgabe bestand darin, eine Vorrichtung der oben angegebenen Art so auszubilden, daß das Absaugen der Schadstoffe enthaltenden Flüssigkeit nicht unterbrochen zu werden braucht, wenn der Unterdruckbehälter gefüllt ist, was besonders beim Absaugen größerer Mengen von Flüssigkeit von großer Bedeutung sein kann.The object underlying the invention was to design a device of the type specified above so that the suction of the liquid containing pollutants does not have to be interrupted when the vacuum container is filled, which can be of great importance especially when suctioning large quantities of liquid .

Die Lösung dieser Aufgabe erfolgt erfindungsgemäß mit den Merkmalen aus dem kennzeichnenden Teil der Patentansprüche 1 oder 10.This object is achieved according to the invention with the features from the characterizing part of patent claims 1 or 10.

Demnach besteht der Grundgedanke der Erfindung darin, die Schwierigkeit der Entleerung des Unterdruckbehälters gegen den hinter dem Auslaß herrschenden Luftdruck dadurch zu beheben, daß der Abfluß der Flüssigkeit durch den Auslaß auch bei im Unterdruckbehälter herrschendem Luftdruck mindestens während vorgegebener Zeiträume aufrechterhalten wird, indem dafür gesorgt wird, daß der durch die Summe aus dem hydrostatischen Druck der Flüssigkeit und dem Luftdruck im Unterdruckbehälter gegebene Auslaßdruck größer oder gleich dem hinter dem Auslaß herrschenden Luftgegendruck ist, so daß ein Druckausgleich zwischen dem Bereich vor dem Auslaß und dem Bereich hinter dem Auslaß des Unterdruckbehälters durchgeführt wird.Accordingly, the basic idea of the invention is to remedy the difficulty of emptying the vacuum container against the air pressure behind the outlet by maintaining the outflow of the liquid through the outlet at least for a predetermined period of time even when the air pressure is in the vacuum tank by taking care of it that the outlet pressure given by the sum of the hydrostatic pressure of the liquid and the air pressure in the vacuum container is greater than or equal to the air back pressure prevailing behind the outlet, so that a pressure equalization between the area in front of the outlet and the area behind the outlet of the vacuum tank is carried out .

Vorteilhafte Weiterbildungen der beiden in den Patentansprüchen 1 und 10 angegebenen unterschiedlichen Ausführungsformen der erfindungsgemäßen Vorrichtung, die den oben angegebenen Lösungsgedanken benutzen, sind in den Unteransprüchen 2 bis 9 bzw. 11 bis 15 beschrieben.Advantageous further developments of the two different embodiments of the device according to the invention specified in claims 1 and 10, which use the above-mentioned solution, are described in subclaims 2 to 9 and 11 to 15, respectively.

Bei der ersten Ausführungsform nach Patentanspruch 1 wird der Druckunterschied zwischen dem Innenraum des Unterdrucks und dem Außenraum durch eine zusätzliche Wassersäule ausgeglichen, deren hydrostatischer Druck genau der auftretenden Druckdifferenz entspricht. Mit dieser Vorrichtung ist bei Benutzung nur eines Behälters ein kontinuierlicher Betrieb beim Absaugen und beim Abführen der Flüssigkeit möglich. Dabei muß die Vorrichtung eine Bauhöhe aufweisen, die mindestens der erforderlichen Höhe der Wassersäule entspricht. Bei der Größenordnung der verwendeten Sauggebläse und Unterdruckräume und des somit im Unterdruckbehälter erzeugten Unterdrucks in der Größenordnung von 10 bis 20kPa liegt die Höhe der erforderlichen Wassersäule in der Größenordnung von 1 bis 2 m.In the first embodiment according to claim 1, the pressure difference between the interior of the negative pressure and the exterior is compensated for by an additional water column, the hydrostatic pressure of which corresponds exactly to the pressure difference that occurs. With this device, continuous operation during suction and removal of the liquid is possible when using only one container. The device must have a height that corresponds at least to the required height of the water column. Given the magnitude of the suction blowers and vacuum chambers used and the vacuum thus generated in the vacuum container in the order of 10 to 20 kPa, the height of the required water column is in the order of 1 to 2 m.

Bei der Ausführungsform nach Patentanspruch 10 wird der Druckausgleich dadurch hergestellt, daß dem Unterdruckbehälter ein zweiter Behälter nachgeschaltet ist, in dem für bestimmte Zeiträume ein Unterdruck erzeugt wird, der die Abführung der Flüssigkeit aus dem Unterdruckbehälter selbst ermöglicht, während innerhalb anderer Zeiträume der Behälter unter Atmosphärendruck gesetzt wird, damit während dieser Zeiträume die Flüssigkeit aus dem zweiten Unterdruckbehälter abgeführt werden kann. Der zweite Unterdruckbehälter dient also quasi als Pufferbehälter für die Abführung des Schmutzwassers aus dem ersten Unterdruckbehälter. Die Steuerung der Druckänderungen im zweiten Unterdruckbehälter kann entweder vom Füllstand abhängig sein, sie kann aber auch in besonders vorteilhafter Weise von im Unterdruckbehälter selbst infolge der Technik des Absaugens entstehenden stärkeren Druckschwankungen abhängig gemacht werden. Wie weiter unten anhand eines Ausführungsbeispiels noch genauer beschrieben wird kann das Absaugen der Schadstoffe enthaltenden Flüssigkeit von einem Objekt dadurch geschehen, daß das Ende des Zuführungsschlauches, gegebenenfalls unter Zwischenschaltung eines Saugadapters, auf das Objekt aufgesetzt wird. Wenn das Schlauchende oder der Adapter vom Objekt abgehoben wird, vergrößert sich die Eintrittsöffnung und es strömt mehr Luft nach. Diese Änderungen in der Betriebsweise haben im Unterdruckraum starke Druckschwankungen zur Folge. Die Steuerung kann nun so erfolgen, daß während der Zuführung der Flüssigkeit in den ersten Unterdruckbehälter der Zusatzbehälter unter Atmosphärendruck steht und sich in der weiter unten beschriebenen Weise entleert. Wenn nun beispielsweise durch Abheben des Adapters vom Objekt eine starke Druckschwankung auftritt, also der Unterdruck im Unterdruckbehälter durch Nachströmen von Luft geringer wird, erfolgt die Umsteuerung, so daß nun der Zusatzbehälter unter den gleichen Unterdruck gesetzt wird unter dem sich der erste Unterdruckbehälter befindet, so daß in dieser Betriebsphase die im ersten Unterdruckbehälter angesammelte Flüssigkeit in den zweiten Unterdruckbehälter abströmen kann. Beim Wiederaufsetzen des Adapters auf das Objekt und dem Wiederansaugen weiterer Flüssigkeit erfolgt die Rücksteuerung und es beginnt nunmehr wieder die erste Phase, in der die vom Objekt abgesaugte Flüssigkeit dem ersten Unterdruckbehälter zugeführt wird und währenddessen der zweite Unterdruckbehälter geleert wird.In the embodiment according to claim 10, the pressure compensation is established in that the vacuum container is followed by a second container in which a vacuum is generated for certain periods of time allows the liquid to be removed from the vacuum container itself, while the container is placed under atmospheric pressure within other periods, so that the liquid can be removed from the second vacuum container during these periods. The second vacuum tank thus serves as a buffer tank for the removal of the dirty water from the first vacuum tank. The control of the pressure changes in the second vacuum container can either be dependent on the fill level, but it can also be made particularly dependent on the greater pressure fluctuations occurring in the vacuum container itself due to the technique of suction. As will be described in more detail below with the aid of an exemplary embodiment, the liquid containing harmful substances can be sucked off from an object by placing the end of the supply hose on the object, possibly with the interposition of a suction adapter. When the hose end or the adapter is lifted from the object, the inlet opening increases and more air flows in. These changes in the operating mode result in strong pressure fluctuations in the vacuum chamber. The control can now be carried out in such a way that while the liquid is being fed into the first vacuum container, the additional container is under atmospheric pressure and is emptied in the manner described below. If, for example, a strong pressure fluctuation occurs when the adapter is lifted from the object, that is to say the negative pressure in the vacuum container becomes lower as a result of air flowing in, the reversal takes place, so that the additional container now is placed under the same negative pressure under which the first negative pressure container is located, so that in this operating phase the liquid accumulated in the first negative pressure container can flow out into the second negative pressure container. When the adapter is re-placed on the object and further liquid is sucked in, the reverse control takes place and the first phase now begins again, in which the liquid sucked off the object is fed to the first vacuum container and the second vacuum container is emptied during this time.

Auch bei dieser Ausführungsform der erfindungsgemäßen Vorrichtung ist ein quasi kontinuierliches Arbeiten möglich, indem das Gerät zur Entleerung des Unterdruckbehälters nicht abgeschaltet zu werden braucht und die Entleerung des Unterdruckbehälters über den Zusatzbehälter in den sich natürlich ergebenden Betriebsphasen durchgeführt wird, in denen im ersten Unterdruckbehälter ein geringerer Unterdruck herrscht.In this embodiment of the device according to the invention, a quasi-continuous operation is possible in that the device for emptying the vacuum container does not have to be switched off and the vacuum container is emptied via the additional container in the naturally occurring operating phases, in which a lower one takes place in the first vacuum container There is negative pressure.

Im folgenden werden anhand der beigefügten Zeichnungen Vorrichtungen beschrieben, die den beiden grundsätzlichen Ausführungsmöglichkeiten der Erfindung entsprechen.In the following, devices will be described with reference to the accompanying drawings, which correspond to the two basic possible embodiments of the invention.

In den Zeichnungen zeigen:

Fig. 1
in einer stark schematisierten Seitenansicht eine erste Vorrichtung zur Absaugung von Schmutzwasser, die an eine Toiletteneinrichtung im Haushalt anschließbar ist;
Fig. 2
in einer Darstellung analog Fig. 1 die Vorrichtung nach Fig. 1 in einer Ansicht von hinten;
Fig. 3
eine Variante der Vorrichtung nach Fig. 1 und 2;
Fig. 4
in einer ebenfalls stark schematisierten Darstellung eine Vorrichtung zum Absaugen von Schmutzwasser mit zwei hintereinandergeschalteten Unterdruckbehältern;
Fig. 5
eine Einzelheit der Ausführungsform nach Fig. 4;
Fig. 6
eine weitere Ausführungsform einer Vorrichtung zum Absaugen von Schmutzwasser mit zwei hintereinandergeschalteten Zusatzbehältern;
Fig.6a
eine Variante der Vorrichtung nach Fig. 6;
Fig. 7
eine Einzelheit der Ausführungsform nach Fig. 6.
The drawings show:
Fig. 1
in a highly schematic side view, a first device for suctioning dirty water, which can be connected to a toilet facility in the household;
Fig. 2
in a representation analogous to Figure 1, the device of Figure 1 in a view from behind.
Fig. 3
a variant of the device of Figures 1 and 2.
Fig. 4
in a likewise highly schematic representation, a device for extracting dirty water with two vacuum containers connected in series;
Fig. 5
a detail of the embodiment of FIG. 4;
Fig. 6
a further embodiment of a device for suctioning dirty water with two additional containers connected in series;
Fig.6a
a variant of the device of FIG. 6;
Fig. 7
a detail of the embodiment of FIG. 6th

Die in den Fig. 1 und 2 dargestellte Vorrichtung ist in erster Linie zur Absaugung und Abführung einer Schadstoff enthaltenden Flüssigkeit, also beispielsweise von Schmutzwasser, innerhalb von Gebäuden, also beispielsweise Wohnungen, Büros, Krankenhäusern usw., gedacht, wobei davon ausgegangen wird, daß irgendwo in der Nähe der Schmutzwasseransammlung ein funktionsfähiger Abfluß, beispielsweise in Gestalt einer Toilette, vorhanden ist.The device shown in FIGS. 1 and 2 is primarily intended for suction and removal of a liquid containing pollutants, for example, dirty water, inside buildings, for example apartments, offices, hospitals, etc., it being assumed that somewhere near the dirty water accumulation there is a functional drain, for example in the form of a toilet.

Die Vorrichtung besitzt ein Grundgestell 10, das auf Rädern 10.1 verfahrbar ist. Am Grundgestell 10 ist ein Unterdruckbehälter 1 angeordnet, der an seiner Oberseite mit einem Deckel 1.1 dicht verschlossen ist. Durch den Deckel 1.1 sind zwei Unterdruckanschlüsse 1.2 und 1.3 geführt, die jeweils an ein auf den Deckel 1.1 angeordnetes Sauggebläse 2 bzw. 3 bekannter Bauart angeschlossen sind. Am inneren Ende der beiden Unterdruckanschlüsse 1.2 und 1.3 sind jeweils Rückschlagventile 1.4 und 1.5 angeordnet, die als Kugelventile ausgebildet sind und dafür sorgen, daß auch bei raschem Anstieg des Wasserspiegels innerhalb des Unterdruckraums kein Wasser von den Sauggebläsen angesaugt werden kann.The device has a base frame 10 which can be moved on wheels 10.1. A vacuum container 1 is arranged on the base frame 10 and is sealed on its upper side with a lid 1.1. Two vacuum connections 1.2 and 1.3 are led through the cover 1.1, each of which is connected to a suction blower 2 or 3 of known design arranged on the cover 1.1. At the inner end of the two vacuum connections 1.2 and 1.3, check valves 1.4 and 1.5 are arranged, which are designed as ball valves and ensure that even with a rapid rise in the water level within the vacuum chamber, no water can be sucked in by the suction fans.

In das Oberteil des Unterdruckbehälters 1 mündet weiterhin ein Sauganschluß 1.6 ein, an dem ein Zuführungsschlauch 4 angeschlossen ist. Am nicht dargestellten freien Ende des Zuführungsschlauches 4 kann ein Saugmundstück bekannter Bauart angeschlossen sein.In the upper part of the vacuum container 1 also opens a suction port 1.6, to which a supply hose 4 is connected. At the free end of the supply hose 4, not shown, a suction mouthpiece of known design can be connected.

Innerhalb des Innenraums im Unterdruckbehälter 1 sind weiterhin Sprühdüsen 1.7 angeordnet, denen in nicht eigens dargestellter Weise Frischwasser oder eine andere Reinigungsflüssigkeit zugeführt werden kann zur Reinigung des Innenraums im Unterdruckbehälter 1.Spray nozzles 1.7 are also arranged within the interior in the vacuum container 1, to which fresh water or another cleaning liquid can be supplied in a manner not specifically shown for cleaning the interior in the vacuum container 1.

Der Unterdruckbehälter 1 mündet in seinem Unterteil in zwei Auslässe 1.8 und 1.9, an die sich in vertikaler Richtung jeweils ein Wasserstandrohr 5.1 bzw. 5.2 anschließt. Die unteren Enden der Wasserstandrohre 5.1 und 5.2 sind in dem unteren Bereich eines Sammelbehälters 6 hineingeführt, der ebenfalls am Grundgestell 10 angeordnet ist. Der Sammelbehälter 6 ist an seiner Oberseite mit einem abnehmbaren Deckel 6.1 abgeschlossen. An seiner Unterseite besitzt der Sammelbehälter 6 ein sich trichterförmig in den Behälter hinein erstreckendes Auslaßrohr 6.2, an dessen Außenseite eine Dichtungsmanschette 6.3 angeordnet ist. In den trichterförmigen Teil des Auslaßrohres 6.2 ist ein Wasserabführungsrohr 6.4 dichtend eingeschraubt, das mit seinem oberen Ende in den Innenraum des Sammelbehälters hineinragt, wobei an diesem oberen Ende ein Einlaßstück 6.5 teleskopartig verschiebbar angeordnet ist, wodurch bewirkt wird, daß die Einlaßöffnung für das Wasserabführungsrohr innerhalb des Innenraums des Sammelbehälters 6 auf unterschiedliche Höhen eingestellt werden kann. Weiterhin sind im Deckel 6.1 des Sammelbehälters 6 zwei nach innen öffnende Rückschlagventile 6.6 angeordnet, die zum Druckausgleich dienen und das Austreten von gegebenenfalls geruchsbelästigende Stoffe enthaltender Luft aus dem Sammelbehälter 6 verhindern sollen. Schließlich sind im Sammelbehälter 6 noch Sprühdüsen 6.7 angeordnet, denen in nicht eigens dargestellter Weise Frischwasser oder eine andere Reinigungsflüssigkeit zur Säuberung des Sammelbehälters zugeführt werden kann.The vacuum container 1 opens in its lower part into two outlets 1.8 and 1.9, each of which is followed by a water standpipe 5.1 or 5.2 in the vertical direction. The lower ends of the water level pipes 5.1 and 5.2 are led into the lower area of a collecting container 6, which is also arranged on the base frame 10. The top of the collecting container 6 is closed with a removable cover 6.1. On its underside, the collecting container 6 has an outlet tube 6.2 which extends into the container in a funnel shape and on the outside of which a sealing sleeve 6.3 is arranged. In the funnel-shaped part of the outlet pipe 6.2, a water discharge pipe 6.4 is screwed sealingly, which protrudes with its upper end into the interior of the collecting container, an inlet piece 6.5 being arranged telescopically at this upper end, thereby causing the inlet opening for the water discharge pipe inside of the interior of the collecting container 6 can be set to different heights. Furthermore, two inward-opening check valves 6.6 are arranged in the lid 6.1 of the collecting container 6, which serve to equalize the pressure serve and should prevent the escape of possibly odor-polluting substances from the air from the collecting container 6. Finally, spray nozzles 6.7 are also arranged in the collecting container 6, to which fresh water or another cleaning liquid can be supplied in a manner not specifically shown for cleaning the collecting container.

In dem dargestellten Ausführungsbeispiel ist die Vorrichtung über einer Toiletteneinrichtung angeordnet, die als Schmutzwasserablauf benutzt wird. Hierzu ist das Gestell 10 über dem Toilettenbecken 7 so angeordnet, daß das Auslaßrohr 6.2 des Sammelbehälters 6 in die Ablauföffnung 7.1 des Toilettenbeckens 7 hineingeführt ist, wobei die Dichtungsmanschette 6.3 für eine Abdichtung des Auslasses gegenüber der Einlaßöffnung im Toilettenbecken 7 dient. Um das Grundgestell 10 mittels der Räder 10.1 über die Toilette fahren zu können, kann der den Sammelbehälter 6 und den Unterdruckbehälter 1 umfassende Teil der Vorrichtung am Grundgestell 10 in nicht eigens dargestellter Weise anhebbar und absenkbar angeordnet sein.In the illustrated embodiment, the device is arranged above a toilet facility that is used as a waste water drain. For this purpose, the frame 10 is arranged above the toilet bowl 7 in such a way that the outlet pipe 6.2 of the collecting container 6 is led into the outlet opening 7.1 of the toilet bowl 7, the sealing sleeve 6.3 serving for sealing the outlet with respect to the inlet opening in the toilet bowl 7. In order to be able to drive the base frame 10 over the toilet by means of the wheels 10.1, the part of the device comprising the collecting container 6 and the vacuum container 1 can be arranged on the base frame 10 in a manner that is not specifically shown and can be raised and lowered.

Zur dargestellten Toiletteneinrichtung gehört in üblicher Weise auch ein an einer Wand 9 befestigter Spülkasten 8.In the usual way, the toilet device shown also includes a cistern 8 attached to a wall 9.

Zur Inbetriebnahme der in den Fig. 1 und 2 dargestellten Vorrichtung werden die Sauggebläse 2 und 3 eingeschaltet, so daß aus dem Innenraum des Unterdruckbehälters 1 die Luft abgesaugt wird. Es wird dann in den Sammelbehälter 6 Wasser eingefüllt, und zwar in solcher Menge, daß infolge des im Unterdruckbehälter 1 erzeugten Unterdrucks das Wasser in den beiden Wasserstandrohren 5.1 und 5.2 emporsteigt bis der Wasserspiegel der Wassersäule auf einer Höhe W1 angelangt ist, in der sich ein weiter unten näher erläuterter Gleichgewichtszustand einstellt. Die Wasserzugabe in den Sammelbehälter 6 erfolgt so, daß außerdem im Sammelbehälter 6 der Wasserspiegel auf einer Höhe W2 liegt, die oberhalb der Anschlußöffnung der Wasserstandrohre 5.1 und 5.2 liegt, aber knapp unterhalb der Einlaßöffnung in das Wasserabführungsrohr 6.4.To start up the device shown in FIGS. 1 and 2, the suction fans 2 and 3 are switched on, so that the air is sucked out of the interior of the vacuum container 1. Water is then poured into the collecting container 6, in such an amount that, due to the negative pressure generated in the vacuum container 1, the water in the two water level pipes 5.1 and 5.2 rises until the water level of the water column has reached a height W1 at which an equilibrium state, which is explained in more detail below, is established. The water is added to the collecting container 6 in such a way that the water level in the collecting container 6 is also at a level W2 which is above the connection opening of the water standpipes 5.1 and 5.2, but just below the inlet opening into the water discharge pipe 6.4.

Bei eingestelltem Gleichgewicht entspricht die Summe aus dem im Unterdruckbehälter 1 herrschenden Druck und dem hydrostatischen Druck der Wassersäulen in den Wasserstandrohren 5.1 und 5.2 zwischen den Höhen W2 und W1 gerade dem äußeren Luftdruck, wobei der untere Teil der Wasserstandrohre 5.1 und 5.2 zusammen mit dem Sammelbehälter 6 als Siphon wirkt.When the equilibrium is set, the sum of the pressure prevailing in the vacuum tank 1 and the hydrostatic pressure of the water columns in the water level pipes 5.1 and 5.2 between heights W2 and W1 corresponds exactly to the external air pressure, the lower part of the water level pipes 5.1 and 5.2 together with the collecting tank 6 acts as a siphon.

Das infolge des Unterdrucks im Unterdruckbehälter 1 beim Ansetzen des Saugmundstücks durch den Zuführungsschlauch 4 angesaugte Schmutzwasser tritt in den Unterdruckbehälter 1 ein so daß sich der Wasserspiegel im Unterdruckbehälter 1 erhöht. Zur Wiederherstellung des Gleichgewichtes erhöht sich auch der Wasserspiegel im Sammelbehälter 6 und im stationären Zustand fließt über den Überlauf 6.5 gerade soviel Wasser aus dem Sammelbehälter 6 ab, wie dem Unterdruckbehälter 1 zugeführt wird. Beim Abheben des Saugmundstücks aus der aufzusaugenden Schmutzwassermenge kann Luft durch den Zuführungsschlauch 4 nachströmen, so daß der Druck im Unterdruckbehälter ansteigt und der Wasserspiegel W1 entsprechend absinkt, jedoch äußerstenfalls bis auf die Höhe W2. Beim Wiederansaugen von Schmutzwasser stellt sich der alte Gleichgewichtszustand mit der Höhe W1 sogleich wieder ein. Die Vorrichtung kann also kontinuierlich betrieben werden und das aufgesaugte Schmutzwasser aus dem Unterdruckraum wird während des ganzen Betriebes in die Toiletteneinrichtung 7 abgeführt.The dirty water sucked in through the supply hose 4 as a result of the negative pressure in the negative pressure container 1 when the suction mouthpiece is attached enters the negative pressure container 1 so that the water level in the negative pressure container 1 increases. To restore equilibrium, the water level in the collecting tank 6 also rises and in the stationary state just as much water flows out of the collecting tank 6 as is supplied to the vacuum tank 1 via the overflow 6.5. When the suction mouthpiece is lifted from the amount of dirty water to be sucked up, air can flow in through the supply hose 4, so that the pressure in the vacuum container rises and the water level W1 drops accordingly, but at most up to the height W2. When dirty water is sucked in again, the old state of equilibrium with the height W1 is restored immediately a. The device can thus be operated continuously and the sucked-up dirty water from the vacuum chamber is discharged into the toilet device 7 during the entire operation.

Fig. 3 zeigt eine Variante der Ausführungsform nach den Fig. 1 und 2.3 shows a variant of the embodiment according to FIGS. 1 and 2.

Der Unterdruckbehälter 11 ist mit einem Deckel 11.1 abgeschlossen, auf dem ein Sauggebläse 12 angeordnet ist, das über einen Unterdruckanschluß 11.2 die Luft aus dem Unterdruckbehälter 1 absaugt. Der Unterdruckbehälter 11 weist einen Sauganschluß 11.6 auf, an den der Zuführungsschlauch 14 angeschlossen ist. Über ein Wasserstandrohr 15 ist der Auslaß 11.8 des Unterdruckbehälters 11 an einen Sammelbehälter 16 angeschlossen, wobei die Einlaßöffnung zwischen dem Wasserstandrohr 15 und dem Sammelbehälter 16 durch eine Rückschlagklappe 15.2 verschließbar ist. Im Unterdruckbehälter 11 und im Wasserstandrohr 15 sowie im Sammelbehälter 16 sind Sprühdüsen 11.7, 15.1 bzw. 16.7 angeordnet, denen zur Reinigung Frischwasser zugeführt werden kann. Der Sammelbehälter 16 ist an seiner Oberseite mit einem abnehmbaren Deckel 16.1 verschlossen. Der Druckausgleich zwischen Sammelbehälter 16 und dem Außenraum erfolgt über Ausgleichsventile 16.6.The vacuum container 11 is closed with a lid 11.1 on which a suction blower 12 is arranged, which sucks the air out of the vacuum container 1 via a vacuum connection 11.2. The vacuum container 11 has a suction connection 11.6 to which the supply hose 14 is connected. The outlet 11.8 of the vacuum container 11 is connected to a collecting container 16 via a water standpipe 15, the inlet opening between the water standpipe 15 and the collecting container 16 being closable by a non-return flap 15.2. Spray nozzles 11.7, 15.1 and 16.7 are arranged in the vacuum tank 11 and in the water standpipe 15 and in the collecting tank 16, to which fresh water can be supplied for cleaning. The top of the collecting container 16 is closed with a removable cover 16.1. The pressure equalization between the collecting container 16 and the outside space takes place via equalizing valves 16.6.

Das Auslaßrohr 16.2 des Sammelbehälters 16 ist in den Auslaß 7.1 einer Toiletteneinrichtung 7 mittels einer Manschettendichtung 16.3 dichtend eingesetzt.The outlet pipe 16.2 of the collecting container 16 is inserted sealingly into the outlet 7.1 of a toilet device 7 by means of a sleeve seal 16.3.

Die Funktionsweise der Vorrichtung nach Fig. 3 ist prinzipiell die gleiche wie die Funktionsweise der Vorrichtung nach Fig. 1 und 2. Der Wasserspiegel W3 im Unterdruckbehälter 11 bzw. im Wasserstandrohr 15 ist so eingestellt, daß der oben erwähnte Gleichgewichtszustand zwischen dem Atmosphärendruck einerseits und der Summe aus dem Druck im Unterdruckbehälter 11 und dem hydrostatischen Druck der Wassersäule im Wasserstandrohr 15 während des Betriebes erhalten bleibt. Durch den äußeren Luftdruck schließt die Rückschlagklappe 12.2. Bei einer Erhöhung des Wasserstandes im Unterdruckbehälter 11 durch Zuführung von Schmutzwasser über den Zuführungsschlauch 14 fließt eine entsprechende Wassermenge über den Sammelbehälter 16 ab, so daß sich der Gleichgewichtszustand wieder einstellt.The principle of operation of the device according to FIG. 3 is the same as the principle of operation of the device according to FIGS. 1 and 2. The water level W3 in Vacuum tank 11 or in the water standpipe 15 is set so that the above-mentioned equilibrium state between the atmospheric pressure on the one hand and the sum of the pressure in the vacuum tank 11 and the hydrostatic pressure of the water column in the water standpipe 15 is maintained during operation. The check valve closes due to the external air pressure 12.2. With an increase in the water level in the vacuum container 11 by supplying dirty water via the supply hose 14, a corresponding amount of water flows out through the collecting container 16, so that the state of equilibrium is restored.

Die Ausführungsformen nach den Fig. 1 bis 3 benötigen eine gewisse Mindestbauhöhe, da die Länge der Wasserstandrohre 5.1, 5.2 und 15 so gewählt sein muß, daß Wassersäulen erzeugbar sind, die einen dem gewählten Unterdruck im Unterdruckbehälter 1 bzw. 11 entsprechenden ausreichenden hydrostatischen Druck erzeugen.The embodiments according to FIGS. 1 to 3 require a certain minimum height, since the length of the water standpipes 5.1, 5.2 and 15 must be selected so that water columns can be generated which generate a sufficient hydrostatic pressure corresponding to the selected vacuum in the vacuum container 1 or 11 .

Im folgenden werden Ausführungsbeispiele beschrieben, die dieses Erfordernis nicht aufweisen und somit in flacherer Bauweise konstruiert sein können.Exemplary embodiments are described below which do not have this requirement and can therefore be constructed in a flatter design.

In Fig. 4 ist eine Vorrichtung zum Absaugen und Abführen von Schmutzwasser dargestellt mit einem Unterdruckbehälter 21, der an seiner Oberseite durch einen Deckel 21.1 dicht abgeschlossen ist. Durch den Deckel ist ein Unterdruckanschluß 21.2 hindurch und in den Innenraum des Unterdruckbehälters 21 hineingeführt, an dessen freiem Ende ein Kugelventil 21.4 angeordnet ist. Ein auf dem Deckel 21.1 angeordnetes Sauggebläse 22 ist über den Unterdruckanschluß 21.2 mit dem Innenraum des Unterdruckbehälters 21 verbunden. In das Oberteil des Unterdruckbehälters 21 mündet weiterhin ein Sauganschluß 21.6 ein, an den ein Wasserzuführungsschlauch 24 angeschlossen ist. Die am Boden des Unterdruckbehälters 21 angeordnete Auslaßöffnung 21.8 ist über ein Rückschlagventil 21.3 mit dem Oberteil eines zweiten Unterdruckbehälters 26 verbunden, der wiederum eine Auslaßöffnung 26.1 besitzt, welche über ein Rückschlagventil 26.2 mit einer Schmutzwasserabführungsleitung 28 verbunden ist. Der Innenraum des ersten Unterdruckbehälters 21 ist über ein Bypass-System 25 mit dem Innenraum des zweiten Unterdruckbehälters 26 verbunden. Das Bypass-System 25 besitzt einen mit dem Innenraum des zweiten Unterdruckbehälters 26 verbundenen Zweig 25.2, der über ein ansteuerbares 3/2-Wegeventil 27 entweder mit einem sich zur äußeren Atmosphäre hin öffnenden Zweig 25.3 oder mit einem zum Innenraum des ersten Unterdruckbehälters 21 hinführenden Zweig 25.1 verbindbar ist.In Fig. 4, a device for suction and discharge of dirty water is shown with a vacuum container 21 which is sealed on its top by a lid 21.1. A vacuum connection 21.2 is passed through the cover and into the interior of the vacuum container 21, at the free end of which a ball valve 21.4 is arranged. A suction blower 22 arranged on the cover 21.1 is connected to the interior of the vacuum container 21 via the vacuum connection 21.2. In the upper part of the vacuum tank 21 also opens a suction port 21.6, to which a water supply hose 24 is connected. The outlet opening 21.8 arranged at the bottom of the vacuum container 21 is connected via a check valve 21.3 to the upper part of a second vacuum container 26, which in turn has an outlet opening 26.1, which is connected to a dirty water discharge line 28 via a check valve 26.2. The interior of the first vacuum container 21 is connected to the interior of the second vacuum container 26 via a bypass system 25. The bypass system 25 has a branch 25.2 connected to the interior of the second vacuum container 26, which has a controllable 3/2-way valve 27 either with a branch 25.3 opening to the outside atmosphere or with a branch leading to the interior of the first vacuum container 21 25.1 is connectable.

In Fig. 5 ist eine mögliche Ausführungsform des ansteuerbaren 3/2-Wegeventils 27 näher dargestellt. Bei dieser Ausführungsform ist in den zueinander fluchtenden Zweigen 25.1 und 25.3 ein kolbenartig ausgebildeter Ventilteller 27.1 zwischen zwei Ventilsitzen 27.2 und 27.3 verschiebbar geführt. In der in Fig. 5 dargestellten Stellung des Ventiltellers 27.1, in der er am Ventilsitz 27.2 anliegt, ist der sich zur Atmosphäre hin öffnende Zweig 25.3 verschlossen und die beiden Zweige 25.1 und 25.2 sind miteinander verbunden. Der Ventilteller 27.1 ist zusammen mit einer Führungsstange 27.5 gegen die Kraft einer Druckfeder 27.6 verschiebbar. Die Druckfeder stützt sich mit ihrem vom Ventilteller 27.1 abgewandten Ende an einem Anschlag 27.4 ab, durch den die Führungsstange 27.5 verschiebbar hindurchgeführt ist. Der Anschlag 27.4 ist in nicht eigens dargestellter Weise in seiner Lage verstellbar, wodurch die Vorspannung der Druckfeder 27.6 und damit der Schaltpunkt des Ventils einstellbar ist.5 shows a possible embodiment of the controllable 3/2-way valve 27. In this embodiment, a piston-like valve disk 27.1 is slidably guided between two valve seats 27.2 and 27.3 in the branches 25.1 and 25.3 aligned with one another. In the position of the valve plate 27.1 shown in FIG. 5, in which it rests on the valve seat 27.2, the branch 25.3 opening towards the atmosphere is closed and the two branches 25.1 and 25.2 are connected to one another. The valve plate 27.1 can be moved together with a guide rod 27.5 against the force of a compression spring 27.6. The end of the compression spring facing away from the valve plate 27.1 is supported on a stop 27.4 through which the guide rod 27.5 is slidably guided. The position of the stop 27.4 can be adjusted in a manner not shown, whereby the pretension of the compression spring 27.6 and thus the switching point of the valve can be adjusted.

Unter dem Einfluß eines starken Unterdrucks im Zweig 25.1 kann sich der Ventilteller 27.2 aus der in Fig. 5 dargestellten Stellung nach rechts bewegen bis er am Anschlag 27.3 anliegt und in dieser Stellung den Zweig 25.2 mit dem sich zur Atmosphäre hin öffnenden Zweig 25.3 verbindet. Läßt der Unterdruck im Zweig 25.1 nach, so verschiebt sich schließlich der Ventilteller 27.1 unter dem Einfluß der Kraft der Feder 27.6 wieder nach links bis er am Anschlag 27.2 anliegt und somit die Verbindung zwischen den Zweigen 25.1 und 25.2 wieder hergestellt ist.Under the influence of a strong negative pressure in branch 25.1, valve plate 27.2 can move from the position shown in FIG. 5 to the right until it abuts stop 27.3 and in this position connects branch 25.2 with branch 25.3 opening towards the atmosphere. If the negative pressure in branch 25.1 subsides, valve plate 27.1 finally moves again under the influence of the force of spring 27.6 to the left until it abuts stop 27.2 and the connection between branches 25.1 and 25.2 is thus restored.

Die Funktionsweise der Vorrichtung nach Fig. 4 und 5 ist folgende:
Zum Absaugen von Schmutzwasser wird das Sauggebläse 22 eingeschaltet und das nicht dargestellte Saugmundstück am freien Ende des Zuführungsschlauches 24 auf das abzusaugende Objekt aufgesetzt. Durch die Wirkung des Sauggebläses 22 entsteht im Unterdruckbehälter 21 ein starker Unterdruck, durch den, wie oben dargestellt, der Ventilteller 27.1 in Anschlag an den Ventilsitz 27.3 gebracht wird. In dieser Stellung sind die Innenräume der beiden Unterdruckbehälter 21 und 26 voneinander getrennt und der Innenraum des zweiten Unterdruckbehälters 26 ist über die Zweige 25.2 und 25.3 mit der äußeren Atmosphäre verbunden. Das Schmutzwasser strömt unter der Wirkung des Unterdrucks in den ersten Unterdruckbehälter 21 ein, wo es sich bis etwa zur Höhe W4 ansammeln kann. Ein Abfließen durch den Ausfluß 21.8 ist zunächst nicht möglich, da das Rückschlagventil 21.3 unter der Wirkung des im zweiten Unterdruckbehälter 26 herrschenden Luftdrucks schließt und dieser Schließdruck vom hydrostatischen Druck der Wassersäule im ersten Unterdruckbehälter 21 wegen des dort herrschenden Unterdrucks nicht überwunden wird.The operation of the device according to FIGS. 4 and 5 is as follows:
To extract dirty water, the suction fan 22 is switched on and the suction mouthpiece, not shown, is placed on the free end of the supply hose 24 on the object to be extracted. The action of the suction fan 22 creates a strong negative pressure in the vacuum container 21, by means of which, as shown above, the valve plate 27.1 is brought into abutment against the valve seat 27.3. In this position, the interior spaces of the two vacuum containers 21 and 26 are separated from one another and the interior space of the second vacuum container 26 is connected to the external atmosphere via the branches 25.2 and 25.3. The dirty water flows under the effect of the negative pressure into the first negative pressure container 21, where it can accumulate up to approximately the height W4. A drain through the outlet 21.8 is initially not possible because the check valve 21.3 closes under the effect of the air pressure prevailing in the second vacuum container 26 and this closing pressure is not overcome by the hydrostatic pressure of the water column in the first vacuum container 21 because of the vacuum prevailing there.

Eventuell im zweiten Unterdruckbehälter 26 enthaltenes Schmutzwasser kann jedoch unter diesen Bedingungen ohne weiteres durch den Ausfluß 26.1 und das Rückschlagventil 26.2 abfließen.Dirty water possibly contained in the second vacuum tank 26 can, however, easily flow out through the outlet 26.1 and the check valve 26.2 under these conditions.

Wird während des Betriebes das Saugmundstück abgehoben, so daß mehr Luft durch den Zuführungsschlauch 24 in den ersten Unterdruckbehälter 21 einströmen kann, so steigt der Druck im Unterdruckbehälter 21 und entsprechend im Zweig 25.1 an bis schließlich eine Umsteuerung des Ventils 27 erfolgt und der Ventilteller 27.1 wieder in die in Fig. 5 dargestellte Position zurückkehrt, in der er am Ventilsitz 27.2 anliegt. In dieser Stellung sind die Innenräume der beiden Unterdruckbehälter 21 und 26 miteinander verbunden und in beiden herrscht der gleiche Druck, der unterhalb des äußeren Atmosphärendrucks liegen kann. In dieser Stellung kann das im ersten Unterdruckbehälter 21 enthaltene Schmutzwasser über das Rückschlagventil 21.3 in den zweiten Unterdruckbehälter 21 einströmen und sich dort etwa bis zur Höhe des Wasserspiegels W5 sammeln. Ein Abfließen des Schmutzwassers aus den zweiten Unterdruckbehälter 26 ist unter diesen Bedingungen nicht möglich, da im Unterdruckbehälter 26 ein gewisser Unterdruck herrscht und das Rückschlagventil 26.2 unter dem Einfluß des äußeren Atmosphärendrucks schließt.If the suction mouthpiece is lifted off during operation so that more air can flow through the supply hose 24 into the first vacuum container 21, the pressure in the vacuum container 21 and accordingly in the branch 25.1 increases until valve 27 is finally reversed and the valve plate 27.1 again 5, in which it rests on the valve seat 27.2. In this position, the interiors of the two vacuum containers 21 and 26 are connected to one another and in both the same pressure prevails, which can be below the external atmospheric pressure. In this position, the dirty water contained in the first vacuum tank 21 can flow into the second vacuum tank 21 via the check valve 21.3 and collect there up to the level of the water level W5. Under these conditions, it is not possible for the dirty water to flow out of the second vacuum container 26, since there is a certain vacuum in the vacuum container 26 and the check valve 26.2 closes under the influence of the external atmospheric pressure.

Wird das Saugmundstück wieder auf das abzusaugende Objekt aufgesetzt, so stellt sich der oben beschriebene erste Zustand wieder ein, indem das Schmutzwasser in den ersten Unterdruckbehälter 21 eingesaugt wird, aus dem es nicht abfließen kann und indem sich der zweite Unterdruckbehälter 26 über das Rückschlagventil 26.2 entleeren kann.If the suction mouthpiece is placed back on the object to be vacuumed, it will be at the top described first state again in that the dirty water is sucked into the first vacuum container 21, from which it cannot drain and by the second vacuum container 26 can be emptied via the check valve 26.2.

Der Vorteil dieser Vorrichtung gegenüber anderen bekannten Absaugvorrichtungen besteht darin, daß während des Betriebes der erste Unterdruckraum 21 nie völlig belüftet zu werden braucht und das Sauggebläse 22 ständig weiter läuft. Die Umsteuerung vom ersten in den zweiten Betriebszustand erfolgt lediglich durch Abheben des Saugmundstücks, ein Vorgang der beim Absaugen von Schmutzwasser vom Boden im natürlichen Arbeitsverlauf sowieso von Zeit zu Zeit auftritt. Selbstverständlich kann durch entsprechende Füllstandsanzeigen, die gegebenenfalls Alarmsignale abgeben, sichergestellt werden, daß keiner der beiden Unterdruckbehälter 21 und 26 über eine bestimmte Füllstandshöhe hinaus gefüllt wirdThe advantage of this device over other known suction devices is that the first vacuum chamber 21 never needs to be completely ventilated during operation and the suction fan 22 continues to run. The changeover from the first to the second operating state only takes place by lifting off the suction mouthpiece, a process that occurs from time to time anyway when suctioning dirty water from the floor in the natural course of work. Of course, it can be ensured by appropriate level indicators, which may emit alarm signals, that neither of the two vacuum containers 21 and 26 is filled beyond a certain level

Die in den Fig. 6, 6a und 7 dargestellte Vorrichtung unterscheidet sich von der Vorrichtung gemäß Fig. 4 und 5 im wesentlichen durch die Ausbildung des Bypass-Systems und des 3/2-Wegeventils.The device shown in FIGS. 6, 6a and 7 differs from the device according to FIGS. 4 and 5 essentially in the design of the bypass system and the 3/2-way valve.

Auf dem Deckel 31.1 des ersten Unterdruckbehälters 31 ist das Sauggebläse 32 angeordnet, das über den Unterdruckanschluß 31.2, der mit dem Kugelventil 31.4 versehen ist, den Innenraum des ersten Unterdruckraums 31 evakuiert. An den Sauganschluß 31.6 des Unterdruckraums 31 ist der Zuführungsschlauch 34 angeschlossen. Der Auslaß am Boden des ersten Unterdruckbehälters 31 ist über ein Rückschlagventil 31.3 mit dem Innenraum des zweiten Unterdruckbehälters 36 verbunden, dessen Auslaß 36.1 über ein Rückschlagventil 36.2 mit einer Schmutzwasserabführungsleitung 38 verbunden ist. Die Innenräume der beiden Unterdruckbehälter 31 und 36 sind über ein Bypass-System 35 miteinander verbunden, das ein 3/2-Wegeventil 37 enthält.Arranged on the cover 31.1 of the first vacuum container 31 is the suction fan 32, which evacuates the interior of the first vacuum space 31 via the vacuum connection 31.2, which is provided with the ball valve 31.4. The supply hose 34 is connected to the suction connection 31.6 of the vacuum chamber 31. The outlet at the bottom of the first vacuum container 31 is connected via a check valve 31.3 to the interior of the second vacuum container 36, the outlet thereof 36.1 is connected to a waste water discharge line 38 via a check valve 36.2. The interiors of the two vacuum containers 31 and 36 are connected to one another via a bypass system 35, which contains a 3/2-way valve 37.

Bei der in Fig. 6 dargestellten Ausführungsvariante besitzt das Bypass-System insgesamt vier Zweige. Der erste Zweig 35.1 ist an den Innenraum im Oberteil des ersten Unterdruckbehälters 31 angeschlossen, während der zweite Zweig 35.2 an den Innenraum im Oberteil des zweiten Unterdruckbehälters 36 angeschlossen ist. Der dritte Zweig 35.3 öffnet sich zur Atmosphäre und der vierte Zweig 35.4 ist an den Innenraum im unteren Teil des ersten Unterdruckbehälters 31 angeschlossen. Dieser letztere Teil ist in Betrieb mit dem sich sammelnden Schmutzwasser gefüllt. Die Ausbildung des 3/2-Wegeventils ist in Fig. 7 näher dargestellt. Ein Ventilkolben 37.1 ist in dem gradlinig ausgebildeten Abschnitt des Zweiges 35.4 verschiebbar geführt. Der Ventilkolben besitzt zwei Durchlässe 37.2 und 37.3. Über den ersten Durchlaß 37.2 sind die beiden Zweige 35.1 und 35.2 miteinander verbindbar, während über den zweiten Durchlaß 37.3 der Zweig 35.3 über einen Verbindungszweig 35.5 an den Zweig 35.2 anschließbar ist. In der in Fig. 7 dargestellten Stellung sind die beiden Zweige 35.1 und 35.2 voneinander getrennt, während der Zweig 35.2 über den Verbindungszweig 35.5 mit dem sich in die Atmophäre öffnenden Zweig 35.3 verbunden ist. In einer nach links verschobenen Stellung des Ventilkolbens 37.1 sind dagegen die beiden Zweige 35.1 und 35.2 miteinander verbunden, während der Verbindungszweig 35.5 vom Zweig 35.3 abgetrennt ist. Der Ventilkolben 37.2 ist über Ringdichtungen 37.4, 37.5 und 37.6 dichtend geführt.In the embodiment variant shown in FIG. 6, the bypass system has a total of four branches. The first branch 35.1 is connected to the interior in the upper part of the first vacuum container 31, while the second branch 35.2 is connected to the interior in the upper part of the second vacuum container 36. The third branch 35.3 opens to the atmosphere and the fourth branch 35.4 is connected to the interior in the lower part of the first vacuum container 31. In operation, the latter part is filled with the collecting dirty water. The design of the 3/2-way valve is shown in more detail in Fig. 7. A valve piston 37.1 is slidably guided in the straight section of the branch 35.4. The valve piston has two passages 37.2 and 37.3. The two branches 35.1 and 35.2 can be connected to one another via the first passage 37.2, while the branch 35.3 can be connected to the branch 35.2 via the second passage 37.3. In the position shown in FIG. 7, the two branches 35.1 and 35.2 are separated from one another, while the branch 35.2 is connected via the connecting branch 35.5 to the branch 35.3 opening into the atmosphere. In contrast, in a position of the valve piston 37.1 shifted to the left, the two branches 35.1 and 35.2 are connected to one another, while the connecting branch 35.5 is separated from the branch 35.3. The valve piston 37.2 is guided in a sealing manner via ring seals 37.4, 37.5 and 37.6.

Die Funktionsweise der in den Fig. 6 und 7 dargestellten Vorrichtung ist folgende:
Wenn nach Inbetriebnahme des Sauggebläses 32 und Aufsetzen eines an den Zuführungsschlauch 34 angeschlossenen Saugmundstücks auf das abzusaugende Objekt im Unterdruckbehälter 31 ein starker Unterdruck entsteht, verschiebt der äußere Atmosphärendruck den Ventilkolben 37.1 in die in Fig. 7 dargestellte Stellung. Die Innenräume der beiden Unterdruckbehälter 31 und 36 sind voneinander getrennt und der Innenraum des zweiten Unterdruckbehälters 36 ist über den Durchlaß 37.3 mit der äußeren Atmosphäre verbunden. Das Schmutzwasser strömt in den ersten Unterdruckbehälter 31 ein,in dem es sich etwa bis zur Wasserstandshöhe W6 sammeln kann und eventuell im zweiten Unterdruckbehälter 36 enthaltenes Schmutzwasser kann über das Rückschlagventil 36.1 abströmen. Wenn durch Abheben des Saugmundstücks und Einströmen von mehr Luft durch den Zuführungsschlauch 34 der Unterdruck im ersten Unterdruckbehälter 31 geringer wird, reicht mindestens ab einem bestimmten Wasserstand im Unterdruckbehälter 31 der hydrostatische Druck der sich ansammelnden Flüssigkeit aus, um den Ventilkolben 37.1 nach links in die andere Endstellung zu verschieben, in der die beiden Zweige 35.1 und 35.2 und damit die Innenräume der beiden Unterdruckbehälter 31 und 36 miteinander verbunden werden und der Lufteintritt aus der Atmosphäre in den zweiten Unterdruckbehälter 36 unterbunden wird. In dieser Stellung strömt das Schmutzwasser durch das Rückschlagventil 31.3 aus dem ersten Unterdruckbehälter 31 in den zweiten Unterdruckbehälter 36, in dem es sich etwa bis zur Wasserstandshöhe W7 sammelt. Ein Wiederaufsetzen des Saugmundstücks auf das Objekt bewirkt die erneute Umsteuerung des Ventils 37 und es beginnt wieder der oben erwähnte erste Betriebszustand.The operation of the device shown in FIGS. 6 and 7 is as follows:
If, after starting up the suction blower 32 and placing a suction mouthpiece connected to the supply hose 34 on the object to be extracted, a strong negative pressure is created in the vacuum container 31, the external atmospheric pressure shifts the valve piston 37.1 into the position shown in FIG. 7. The interiors of the two vacuum containers 31 and 36 are separated from one another and the interior of the second vacuum container 36 is connected to the outside atmosphere via the passage 37.3. The dirty water flows into the first vacuum tank 31, in which it can collect approximately up to the water level W6, and any dirty water contained in the second vacuum tank 36 can flow out via the check valve 36.1. If the negative pressure in the first negative pressure container 31 becomes lower by lifting the suction mouthpiece and inflowing more air through the supply hose 34, the hydrostatic pressure of the accumulating liquid is sufficient at least from a certain water level in the negative pressure container 31 to move the valve piston 37.1 to the left into the other To move end position in which the two branches 35.1 and 35.2 and thus the interiors of the two vacuum containers 31 and 36 are connected to each other and the entry of air from the atmosphere into the second vacuum container 36 is prevented. In this position, the dirty water flows through the check valve 31.3 from the first vacuum tank 31 into the second vacuum tank 36, in which it collects approximately up to the water level W7. Replacing the suction mouthpiece on the object causes the valve 37 to be reversed again and the above-mentioned first operating state begins again.

Da bei der Ausführungsform nach Fig. 6 der Umsteuerungsvorgang auch von der Füllstandshöhe im ersten Unterdruckbehälter 31 abhängt, ist in Fig. 6a eine Variante dieser Ausführungsform dargestellt, bei der dies nicht der Fall ist. Bei dieser Variante, die im übrigen der Ausführungsform nach Fig. 6 entspricht, ist der Flüssigkeit führende Zweig 35.4 des Bypass-Systems nicht an der Unterseite des ersten Unterdruckbehälters 31 an dessen Innenraum angeschlossen, sondern in das Oberteil des ersten Unterdruckbehälters 31 hineingeführt, so daß an den Zweig 35.4 ein Flüssigkeitsstandrohr 35.6 anschließt, das bis zur Höhe eines Flüssigkeitsspiegels W8 mit einer Flüssigkeit, z.B. Wasser, gefüllt ist.Since in the embodiment according to FIG. 6 the reversing process also depends on the level in the first vacuum container 31, a variant of this embodiment is shown in FIG. 6a, in which this is not the case. In this variant, which otherwise corresponds to the embodiment according to FIG. 6, the liquid-carrying branch 35.4 of the bypass system is not connected to the inside of the first vacuum container 31 on the underside of the first vacuum container, but is guided into the upper part of the first vacuum container 31, so that a liquid standpipe 35.6 connects to the branch 35.4, which up to the level of a liquid level W8 with a liquid, for example Water that is filled.

Das Ventil 37 ist entsprechend Fig. 7 ausgebildet. Bei der Ausführungsform nach Fig. 6a ist der Schaltpunkt des Ventils durch sie sich nicht ändernde Flüssigkeitsmenge im Flüssigkeitsstandrohr 35.6 einstellbar. Eine Verschiebung des Ventilkolbens 37.1 aus der in Fig. 7 rechten Stellung in die linke Stellung erfolgt, wenn die Summe aus dem hydrostatischen Druck der Flüssigkeitssäule im Flüssigkeitsstandrohr 35.6 zusammen mit dem im Unterdruckbehälter 31 noch herrschenden Druck ausreicht, um den Kolben 37.1 gegen den Atmosphärendruck zu verschieben. Die Verschiebung in entgegengesetzter Richtung erfolgt bei stärkerem Unterdruck durch den von außen wirkenden Atmosphärendruck.The valve 37 is designed in accordance with FIG. 7. In the embodiment according to FIG. 6a, the switching point of the valve can be set by the amount of liquid in the liquid standpipe 35.6 that does not change. The valve piston 37.1 is shifted from the right position in FIG. 7 to the left position when the sum of the hydrostatic pressure of the liquid column in the liquid standpipe 35.6 together with the pressure still prevailing in the vacuum container 31 is sufficient to close the piston 37.1 against the atmospheric pressure move. The shift in the opposite direction takes place in the case of a stronger negative pressure due to the atmospheric pressure acting from outside.

Über der Flüssigkeitssäule im Flüssigkeitsstandrohr 35.6 ist zweckmäßig ein im Rohr verschiebbarer, auf der Flüssigkeitsoberfläche aufsitzender Verschlußkolben 35.7 angeordnet, um ein Herausspritzen der Flüssigkeit bei stärkeren Druckschwankungen zu verhindern.Above the liquid column in the liquid standpipe 35.6, a sealing piston 35.7, which is displaceable in the pipe and is seated on the liquid surface, is expediently arranged in order to prevent the liquid from splashing out in the event of greater pressure fluctuations.

Auch bei dieser Ausführungsform können entsprechende Signale abgebende Füllstandsanzeigen für die beiden Unterdruckbehälter vorgesehen sein.In this embodiment, too, corresponding level indicators emitting signals can be provided for the two vacuum containers.

Es ist selbstverständlich möglich, anstelle der in den Fig. 5 und 7 dargestellten 3/2-Wegeventile andere Ausführungsformen von Ventilen zu verwenden, insbesondere elektromagnetisch angesteuerte Ventile, die in nicht dargestellter Weise von Sensoren gesteuert werden, welche auf den im ersten Unterdruckbehälter 31 herrschenden Druck und gegebenenfalls auf die Füllstände der Flüssigkeit in den beiden Unterdruckbehältern ansprechen.It is of course possible to use other embodiments of valves instead of the 3/2-way valves shown in FIGS. 5 and 7, in particular electromagnetically controlled valves, which are controlled in a manner not shown by sensors which act on the one in the first vacuum container 31 Pressure and if necessary respond to the liquid levels in the two vacuum tanks.

Es ist auch möglich, derartige Ventile in einem vorgegebenen Zeittakt umzusteuern, so daß die Entleerung der beiden Unterdruckbehälter in vorgegebenen Zeitabschnitten erfolgt.It is also possible to change over such valves in a predetermined time cycle, so that the two vacuum containers are emptied in predetermined time periods.

Claims (15)

  1. Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water, having a negative-pressure container (1, 11) which has, on its upper part, at least one negative-pressure connection (1.2, 1.3, 11.2) connected to a suction fan and also a suction connection (1.6, 11.6) connected to a supply hose, and which has, on the lower part, at least one outlet (1.8, 11.8) which can be sealed off against the entry of air from outside and downstream of which an outlet arrangement (5.1, 15) is connected, characterized in that the outlet arrangement has a column of liquid standing in a pipe (5.1, 15) connected downstream of the outlet (1.8, 11.8), the height of which column is such that the sum of the hydrostatic pressure it generates and the air pressure in the negative-pressure container (1, 11) is at least equal to the air pressure in the space outside and a sealing device (6-6.5, 15.2) opening in the direction of outflow is disposed at the outer end of the pipe (5..1, 15).
  2. Apparatus according to Claim 1, characterized in that the sealing device is a non-return valve or non-return flap (15.2).
  3. Apparatus according to Claim 1, characterized in that the sealing device is a siphon (6-6.5).
  4. Apparatus according to Claim 3, characterized in that the negative-pressure container (1) is mounted on a base frame (10) on which there is disposed, underneath the negative-pressure container, a collecting container (6) which is at the same air pressure as the outside atmosphere and into which the pipe (5.1, 5.2) of the outlet arrangement opens, the collecting container (6) having a liquid outlet (6.4, 6.5), the inlet aperture of which is located above the mouth of the pipe (5.1, 5.2).
  5. Apparatus according to Claim 5, characterized in that the inlet aperture (6.5) of the liquid outlet is adjustable in its height within the collecting container (6).
  6. Apparatus according to Claim 4 or 5, characterized in that spray nozzles (1.7, 6.7, 11.7, 16.7), to which a cleaning fluid can be supplied, are disposed in the negative-pressure container (1, 11) and/or in the collecting container (6, 16).
  7. Apparatus according to one of Claims 4 to 6, characterized in that the collecting container (6, 16) is sealed in an air-tight manner by means of a removable upper part (6.1, 16.1) in which at least one pressure-equalizing valve (6.6, 16.6) opening only in the direction of the collecting container is disposed.
  8. Apparatus according to one of Claims 4 to 7, characterized in that the liquid outlet (6.5) of the collecting container (6) opens into an outlet connecting piece (6.2) which is disposed on the underside of the said collecting container and which can be inserted, in a sealing manner, in the outflow aperture (7.1) of a lavatory basin (7).
  9. Apparatus according to one of Claims 4 to 8, characterized in that the base frame (10) is designed to be transportable on wheels (10.1) or rollers.
  10. Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water, having a negative-pressure container (21, 31) which has, on its upper part, at least one negative-pressure connection (21.2, 31.2) connected to a suction fan and also a suction connection (21.6, 31.6) connected to a supply hose, and which has, on the lower part, at least one outlet (21.8, 31.8) which can be sealed off against the entry of air from outside and downstream of which an outlet arrangement (25-26-27, 35-36-37) is connected, characterized in that the outlet arrangement has a second negative-pressure container (26, 36) which is disposed underneath or beside the first negative-pressure container (21, 31) and is connected to its outlet (21.8, 31.8) by means of a non-return valve (21.3, 31.3) or non-return flap and the two negative-pressure containers (21, 26 and 31, 36) are connected to each other in their upper part by means of a bypass system (25, 35) which contains a switchable control member (27, 37) which can assume two positions, in the first of which the inner chamber of the first negative-pressure container (21, 31) is connected to the inner chamber of the second negative-pressure container (26, 36), and in the second of which the inner chamber of the second negative-pressure container (26, 36) is connected to the outside atmosphere, and the switching of the control member (27, 37) from one of the two positions into the other takes place in dependence upon the air pressure in the first negative-pressure container (21, 31) and/or upon the level of liquid in one or both of the negative-pressure containers (21, 26 and 31, 36) and the second negative-pressure container (26, 36) has, in its lower part, an outlet (26.1, 36.1) which is connected, by means of a non-return valve (26.2, 36.2) or a non-return flap, to an outflow line (28, 38).
  11. Apparatus according to Claim 10, characterized in that the control member is designed as a switchable 3/2-way valve (27, 37).
  12. Apparatus according to Claim 11, characterized in that the control member is an electromagnetically switchable 3/2-way valve and there are disposed, in the negative-pressure containers, sensors for detecting the air pressure and/or the filling level, the output signals from which are supplied to an electrical control unit which generates a control signal which is supplied to the actuating part of the 3/2-way valve.
  13. Apparatus according to Claim 11, characterized in that the 3/2-way valve is pneumatically switchable in a direct manner by the air pressure in the first negative-pressure container (21, 31).
  14. Apparatus according to Claim 11, characterized in that the 3/2-way valve is hydropneumatically switchable by the sum of the air pressure in the first negative-pressure container (21, 31) and the hydrostatic pressure of a column of water.
  15. Apparatus according to one of Claims 10 to 14, characterized in that the switching of the control member (27, 37) takes place in such a way that, at a predetermined higher negative pressure, the said control member is in the second position in the first negative-pressure container (21, 31), whereas at a predetermined lower negative pressure, it is in the first position.
EP19890103819 1988-03-11 1989-03-04 Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water Expired - Lifetime EP0332090B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883808124 DE3808124A1 (en) 1988-03-11 1988-03-11 DEVICE FOR EXTRACTION AND EXTRACTION OF A LIQUID CONTAINING A POLLUTANT, IN PARTICULAR WASTE WATER
DE3808124 1988-03-11

Publications (3)

Publication Number Publication Date
EP0332090A2 EP0332090A2 (en) 1989-09-13
EP0332090A3 EP0332090A3 (en) 1991-07-03
EP0332090B1 true EP0332090B1 (en) 1994-11-23

Family

ID=6349477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890103819 Expired - Lifetime EP0332090B1 (en) 1988-03-11 1989-03-04 Apparatus for extracting and removing a liquid containing noxious material, especially of dirty water

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US (1) US5022114A (en)
EP (1) EP0332090B1 (en)
AT (1) ATE114228T1 (en)
DE (2) DE3808124A1 (en)

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Publication number Priority date Publication date Assignee Title
FR2674598B1 (en) * 1991-03-28 1993-06-11 Nicoll Raccords Plastiques IMPROVED HYDRAULIC VALVE.
FR2674425B1 (en) * 1991-03-28 1994-12-02 Nicoll Raccords Plastiques IMPROVEMENTS TO DOMESTIC SUCTION INSTALLATIONS.
US5133374A (en) * 1991-04-01 1992-07-28 Druding Kevin W Apparatus and method for purging medical instruments and disposing of infectious waste
DK119093A (en) * 1993-10-22 1995-04-23 Joergen Sjoegreen Universal Vacuum Cleaner
WO1995018685A1 (en) * 1994-01-06 1995-07-13 Ricom Engineering Limited Liquid recovery apparatus
US6513187B1 (en) * 2000-10-12 2003-02-04 Donald P. Naseth, Sr. Continuous carpet cleaning system
CA2425350A1 (en) * 2003-04-14 2004-10-14 Peter Alex Container shut-off valve with venting
CA2441991C (en) * 2003-09-19 2012-11-13 Ronald R. Chisholm Fluid transfer apparatus
US20050115606A1 (en) * 2003-10-01 2005-06-02 Chisholm Ronald R. System for effecting liquid transfer from an elevated supply container
US20050210620A1 (en) * 2004-03-29 2005-09-29 Vanorden Scott T Integrated cleaning apparatus and methods
TWI320835B (en) * 2004-08-31 2010-02-21 Huei Tarng Liou Gas injection device

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US2497435A (en) * 1948-08-24 1950-02-14 Branneman Leonard Steam vacuum cleaner
US2825921A (en) * 1956-02-20 1958-03-11 Armstrong Delay Inc Central vacuum cleaning system
US3048875A (en) * 1960-06-02 1962-08-14 Joseph P Rossi Pneumatic systems
DE3032503C2 (en) * 1980-08-28 1985-05-23 Erhard 6000 Frankfurt Crema Containers for holding media containing pollutants
CA1190008A (en) * 1982-09-27 1985-07-09 Conrad Sevigny Waste liquid disposal apparatus
FR2547189B1 (en) * 1983-06-09 1987-02-13 Aspiramatic IMPROVEMENTS TO CENTRAL VACUUM CLEANING FACILITIES
GB8331234D0 (en) * 1983-11-23 1983-12-29 Aberlan Equipment & Service Co Liquid recovery unit
SE447867B (en) * 1984-08-08 1986-12-22 Waertsilae Oy Ab COMBINED CLEANING AND TRANSPORT SYSTEM
DE3522199A1 (en) * 1985-06-21 1987-01-02 Thyssen Nordseewerke Gmbh Container for receiving media, containing harmful substances, with the aid of negative pressure
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US4766637A (en) * 1988-01-15 1988-08-30 James Winnicki Wet vacuum apparatus

Also Published As

Publication number Publication date
DE58908651D1 (en) 1995-01-05
ATE114228T1 (en) 1994-12-15
US5022114A (en) 1991-06-11
EP0332090A3 (en) 1991-07-03
EP0332090A2 (en) 1989-09-13
DE3808124A1 (en) 1989-09-21

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