WO2008003332A1 - Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient - Google Patents

Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient Download PDF

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Publication number
WO2008003332A1
WO2008003332A1 PCT/EP2006/006424 EP2006006424W WO2008003332A1 WO 2008003332 A1 WO2008003332 A1 WO 2008003332A1 EP 2006006424 W EP2006006424 W EP 2006006424W WO 2008003332 A1 WO2008003332 A1 WO 2008003332A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
float
valve
closing body
container according
Prior art date
Application number
PCT/EP2006/006424
Other languages
German (de)
English (en)
Inventor
Ottorino Gorni
Claudio Guerra
Eugenio Venturini
Original Assignee
Alfred Kärcher Gmbh & Co. Kg
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 Alfred Kärcher Gmbh & Co. Kg filed Critical Alfred Kärcher Gmbh & Co. Kg
Priority to PCT/EP2006/006424 priority Critical patent/WO2008003332A1/fr
Publication of WO2008003332A1 publication Critical patent/WO2008003332A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K24/00—Devices, e.g. valves, for venting or aerating enclosures
    • F16K24/04—Devices, e.g. valves, for venting or aerating enclosures for venting only
    • F16K24/042—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float
    • F16K24/044—Devices, e.g. valves, for venting or aerating enclosures for venting only actuated by a float the float being rigidly connected to the valve element, the assembly of float and valve element following a substantially translational movement when actuated, e.g. also for actuating a pilot valve
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0023—Recovery tanks
    • A47L7/0028—Security means, e.g. float valves or level switches for preventing overflow
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0023—Recovery tanks
    • A47L7/0038—Recovery tanks with means for emptying the tanks
    • 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
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0004—Suction cleaners adapted to take up liquids, e.g. wet or dry vacuum cleaners
    • A47L7/0042—Gaskets; Sealing means

Definitions

  • Container for holding a fluid and suction device with such a container
  • the invention relates to a container for receiving by means of negative pressure in this sucked, in particular solids-containing fluid, with an inlet and an outlet opening for the fluid and with a suction opening for sucking the container and a ventilation opening for venting the container, wherein the outlet opening an outlet valve unit and the ventilation opening associated with a float operable ventilation valve unit and the two valve units are automatically opened and closed depending on the level of the container.
  • the invention relates to a suction device for sucking particularly solids-containing fluid with such a container.
  • Containers for receiving sucked by means of negative pressure in this fluid are used for example in suction devices in the form of so-called sludge suction, with the help of a garden pond can be sucked.
  • the containers can be subjected to negative pressure, so that in particular solids-containing fluid can be sucked in via the inlet opening into a collecting space of the container.
  • an outlet valve unit opens the outlet opening of the container and the fluid can be dispensed, for example, via an outlet hose.
  • Upon reaching a lower level closes the exhaust valve unit, so that again fluid can be sucked.
  • a sludge sucker is known in which the negative pressure is generated by means of a suction unit.
  • the exhaust valve unit assumes its closed position. To dispense fluid, the suction unit must be switched off. It then sets within the container gradually atmospheric pressure and the exhaust valve unit is in its open position, so that the container can be emptied. To empty it is therefore necessary to turn off the suction unit.
  • a container of the aforementioned type which can be ventilated via a ventilation opening.
  • a ventilation valve unit is arranged, which can be actuated by a float arranged inside the container.
  • the float opens the vent valve unit.
  • the lowering of the level has the result that the float closes the ventilation valve unit again, so that the container is again subjected to negative pressure, whereby the outlet valve unit automatically goes into its closed position.
  • the float To open and close the vent valve unit, the float must be moved only slightly.
  • Object of the present invention is to provide a container of the type mentioned and a suction device with such a container such that the container can be almost completely emptied and the mechanical load on the exhaust valve unit and the ventilation unit can be reduced.
  • the float When filling the container, the float experiences a buoyant force, so that it endeavors to carry out a movement corresponding to the rising fluid level. According to the invention, however, the float is subjected to a restraining force counteracting the buoyancy force as a function of the fill level. This makes it possible to initially retain the float in a lowered position despite rising fluid level. Since the restraining force is dependent on the level, it may drop or at least assume a reduced value when an upper level is reached, so that the float can then move upwards in accordance with the acting buoyancy force in order to actuate the venting valve unit. If the ventilation valve unit is opened by the float, external air flows into the container and the negative pressure drops within a short time.
  • the design of the float can be chosen so that it initially remains in its upper position and even gradually with lowering fluid level due to the acting buoyancy again takes a lowered position. Only when a lower level is reached, the float has lowered so far that it closes the vent valve unit, so that due to the continuous pressurization of the container with negative pressure within a short time, the pressure within the container lowers and the exhaust valve unit assumes its closed position and again Fluid can be sucked.
  • the restraining force is dependent on the pressure within the container and the venting valve unit can be opened by the float when an upper level is reached.
  • the float is acted upon by the negative pressure during the loading of the container with a buoyancy force of the float counteracting retention force, which is dependent on the pressure within the container. Due to the prevailing negative pressure fluid is sucked into the container, so that the level rises. However, since the float is subjected to a retention force, it does not easily follow the rising level, so that an actuation of the ventilation valve unit is initially omitted. Only when an upper level is reached, the ventilation valve unit is opened by the float.
  • Exhaust valve unit and vent valve unit according to the invention have a specifiable by the retention force bi-stability.
  • the vent valve assembly remains in its open position from the upper level of the container until the container is almost completely deflated, and upon reaching the lower level, the vent valve unit transitions to its closed position where it remains until it reaches the upper level is.
  • the exhaust valve unit remains in its open position upon reaching the upper level until the container is almost completely emptied and a lower level is reached at which the exhaust valve unit returns to its closed position, in which it remains until until again the upper level is reached.
  • the bistability is achieved by the application of the float with the preferably depending on the pressure within the container retention force.
  • the retention force is chosen such that it is greater than the buoyancy force of the float until the upper level is reached. Only when the upper level is reached, the buoyant force of the float is greater than the restraining force, so that the float can open the ventilation valve unit and move so far upwards that the aeration valve tilhen can only be closed again when the float has reached a position corresponding to the lower level.
  • the actuation of the outlet valve unit takes place, as already known from the publication DE 199 42 187 Al, depending on the pressure acting on the outlet valve unit pressure resulting from the interaction of the negative pressure within the container and the static pressure of the fluid.
  • the exhaust valve unit automatically assumes its closed position.
  • the negative pressure decreases and the outlet valve unit is opened due to the applied static pressure of the fluid.
  • the fluid level lowers until the container is almost completely emptied.
  • the exhaust valve unit Upon reaching the lower level, the exhaust valve unit returns to a closed position due to the vacuum forming within the tank.
  • the container according to the invention can thus be emptied almost completely. This in turn reduces the mechanical stress on the outlet valve unit and the vent valve unit because they have a lower opening and closing frequency compared to known container designs.
  • the loading of the float depending on the level of the container with a retaining force can be done by means of a separate retaining element.
  • the float of the ventilation valve unit can be acted upon by the retention force, because this allows a structurally simpler design of the container.
  • the ventilation valve unit takes over in such a configuration additional lent to their function of selectively closing and releasing the ventilation opening, also the function of applying a restraining force to the float during the filling of the container.
  • the ventilation valve unit has at least one closing body coupled to the float, which can be acted upon on one side by the atmospheric pressure prevailing outside the container and on the other side by the pressure prevailing inside the container.
  • the float is acted upon by the closing body with a retaining force. If the float opens the ventilation valve unit, the negative pressure breaks down within the container so that practically no restraining force is exerted on the float by the closing body.
  • the coupling of the float with the at least one closing body of the ventilation valve unit can take place via movable transmission members. It is favorable, however, if the closing body is rigidly connected to the float, because the movement of the float can be transmitted directly to the closing body.
  • the closing body is formed plate-like in an advantageous embodiment. This allows a flat construction of the ventilation valve unit, wherein the closing body can be produced inexpensively.
  • the ventilation valve unit comprises a pilot valve and a main valve, which from the Floats are openable one after the other.
  • the pilot valve Upon reaching a predetermined upper level can be opened by the float first, the pilot valve, the actuation of the float a lower actuation force must be exercised than for actuation of the main valve.
  • the opening of the pilot valve has the consequence that foreign air can flow into the container and thereby reduces the negative pressure within the container. This in turn causes the float is subjected to a smaller retention force, so that he can now also open the main valve, with the result that forms within the container in a very short time almost atmospheric pressure and the float virtually no restraining force applied becomes. He can thus easily assume a position corresponding to the upper level due to the acting buoyancy and thereby hold both the pilot valve and the main valve in the open position until a lower level is reached at which the two valves are closed by the float.
  • pilot valve is rigidly connected to the float, so that movement of the float can be transmitted directly to the pilot valve.
  • the pre-valve preferably has a rigidly connected to the float closing body, which is slidably held in a closing body of the main valve.
  • the closing body of the main valve may have a guide sleeve in which the pilot valve closing body is displaceable.
  • the pilot valve has a closing body in the form of a valve disk, which is connected via a valve lifter with the float.
  • the valve stem engages through the closing body of the main valve, so that the main valve closing body between the closing body of the pilot valve and the float is arranged.
  • the closing body of the pilot valve is associated with a valve seat which is arranged on the closing body of the main valve.
  • the closing body of the main valve can have a lip-like projection onto which the closing body of the pilot valve can be placed in a sealing manner.
  • the main valve of the ventilation valve unit has a closing body, which can be raised after opening the pilot valve by a valve seat assigned to the closing body.
  • the vent valve unit can thus be opened by the float in two stages. In a first stage, only the closing body of the pilot valve is separated from an associated valve seat, and then, in a second stage, the closing body of the main valve can be separated from its associated valve seat.
  • the closing body of the main valve is conveniently funnel-shaped.
  • the closing body can be inserted into a ventilation opening of the container, wherein it is sealingly seated with a bottom on the edge of the ventilation opening and can be lifted by lifting the float of this edge.
  • it can surround the closing body of the pilot valve, the upper side of the funnel-like closing body of the main valve is sealingly placed and can be connected via the valve stem rigidly connected to the float, wherein the plunger engages through the closing body of the main valve.
  • the invention also relates to a suction device for aspirating in particular solids-containing fluid, wherein the suction device comprises a container of the type described above and a suction unit, which is in flow communication with the suction opening of the container.
  • the container can be subjected to negative pressure for sucking, for example, sludge, which is taken from a garden pond.
  • the suction device is thus designed as independently operable sludge suction, the suction unit can be operated continuously. It is not necessary to switch off the suction unit in order to empty the container.
  • the suction unit is arranged above the container, because this allows a particularly compact design of the suction device.
  • Figure 1 is a sectional view of a container according to the invention during the suction of fluid
  • FIG. 2 is a sectional view of the container according to FIG. 1 upon reaching an upper filling level
  • Figure 3 is a sectional view of the container according to Figure 1 during emptying of the container;
  • FIG. 4 a perspective view of the container of Figure 1 in the manner of an exploded view and
  • FIG. 5 shows a sectional view of a suction device according to the invention with a container according to FIG. 1.
  • a container 10 according to the invention is shown schematically in FIGS. 1 to 4 for receiving fluid sucked into it by means of negative pressure, in particular solids-containing fluid.
  • a container is used, in particular, for extracting garden ponds and can be connected to a conventional suction device, in particular a wet-dry vacuum cleaner, for application with negative pressure.
  • the container 10 comprises a designed in the manner of a bucket lower part 11, which defines a collecting space 12 for the fluid, and an upper part 13, which forms a double-walled lid with a collecting space 12 covering the inner lid 14 and an outer lid 15.
  • the container 10 has an inlet opening 17 to which a supply hose for supplying fluid to be suctioned off, in particular sludge to be suctioned off, can be connected.
  • the lower part 14 has an outlet opening 18, on which an outlet valve unit in the form of a flap valve 20 with a pivotable valve flap 21 is arranged.
  • a suction opening 23 is also arranged, to which a suction hose can be connected.
  • the collecting chamber 12 can be continuously acted upon by a suction device with negative pressure. Under the effect of the negative pressure, the fluid can be sucked through the inlet opening 17 into the collecting space 12, and the filled Collecting chamber 12 can be emptied through the outlet port 18. To the outlet port 18, an outlet hose can be connected.
  • the inner lid 14 has a ventilation opening 25 in the middle, on which a ventilation valve unit 26 is arranged. About the vent opening 25, the plenum 12 can be vented upon reaching an upper level. This will be explained in more detail below.
  • a substantially bell-shaped float 28 is arranged for actuating the ventilation valve unit 26.
  • the latter comprises a pilot valve 30 with a Vorventil-closing body 31 and a main valve 33 with a main valve closing body 34.
  • the Vorventil- closing body 31 is plate-like and via a valve stem 36 rigidly connected to the float 38.
  • the main valve-closing body 34 is funnel-shaped and comprises an annular cover 37 which is sealingly seated with its underside on the edge 27 of the vent opening 25 and merges in the direction of the float 28 via a cone-shaped intermediate part 38 into a sleeve 39 which from the valve stem 36 of the Vorventiles 30 is penetrated.
  • the main valve closing body 34 has a multiplicity of perforations 40, which are covered by the pre-valve closing body 36 in the closed position of the ventilation valve unit 26 shown in FIG.
  • the latter is in the closed position of the vent valve unit 26 on top of a sealing lip 41 of the ring cover 37 sealingly.
  • the sealing lip 41 forms a valve seat for the pilot valve 30, and the edge 27 of the ventilation opening 35 forms a valve seat for the main valve 33.
  • FIG. 1 shows the container 10 during the suction of fluid.
  • the fluid flowing into the collecting space 12 is indicated by the arrow 43 in FIG. shows.
  • the collecting space 12 is subjected to negative pressure via the suction opening 23, the suction flow which forms is shown in FIG. 1 by the arrow 44.
  • the vent valve unit 26 as well as the flapper valve 20 is closed, so that due to the inflowing fluid, the fluid level 46 increases continuously. This has the consequence that the float 28 is acted upon by a buoyant force.
  • the float 28 is acted upon by the ventilation valve unit 26 with a buoyancy counteracting restraining force, which is due to the fact that the Vorventil- closing body 31 and the main valve closing body 34 are exposed on its upper side facing away from the plenum 12 to the outside of the plenum 12 prevailing atmospheric pressure.
  • the pilot valve closing body 31, which is rigidly connected to the float 28, thus exerts on the float 28 a downward retention force which prevents the float 28 from moving upwardly in accordance with the fluid level 46. Instead, the float 28 is increasingly immersed in the fluid, so that the buoyant force of the float 28 increases continuously. If the fluid level 46 reaches an upper filling level 48 of the container 10 shown in FIG.
  • the buoyant force of the float 28 exceeds the pressure force exerted by the pre-valve closing body 31 so that the float 48 lifts the pre-valve closing body 31 away from the sealing lip 41.
  • This has the consequence that foreign air 50 can flow through the openings 40 of the main valve closing body 34 into the collecting space 12.
  • the negative pressure lowers, ie the pressure difference between the pressure prevailing outside of the collecting chamber 12 atmospheric pressure and the pressure prevailing within the collecting chamber 12 pressure decreases.
  • the main valve closing body 34 experiences a lower pressure force, so that now the buoyancy of the Float 28 is sufficient to lift the main valve closing body 34 from the associated valve seat, ie from the edge 27 of the vent opening 25.
  • three compression springs 54 are arranged between the main valve closing body 34 and the inner lid 14 with which the dead weight of the float 28 and the closing bodies 31 and 34 of the preventer tiles 30 and the main valve 33 can be balanced.
  • the container 10 can be subjected to continuous negative pressure, wherein alternately fluid is sucked in until reaching the upper level and then can flow out of the container 10 again.
  • the required operation of the ventilation valve unit 26 and the flap valve 20 is carried out automatically depending on the level of the container 10th
  • the pressurization of the container 10 with negative pressure can be effected by means of an external vacuum source.
  • the container 10 in combination with a suction unit forms a manageable unit in the form of a suction device.
  • a suction device 60 is shown schematically in FIG.
  • the suction device 60 comprises a suction unit 61, which is placed on the container 10.
  • the suction unit 61 is arranged in a suction head 63, to which a suction channel 64 connects. Via the suction channel 64, the suction unit 61 is in fluid communication with the suction opening 23 of the container 10.
  • the suction device 10 With the help of the suction device 10 in particular solids-containing fluids can be sucked, it is particularly suitable for extracting garden ponds. However, it can also be used for the extraction of other fluids, for example for the extraction of liquid media contaminated with solid and / or liquid pollutants.
  • the suction unit 61 can be operated continuously, wherein the ventilation valve unit 26 and the flap valve 20 open and close automatically depending on the level of the container 10.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

La présente invention concerne un récipient (10) conçu pour recevoir un fluide qui est aspiré dans ce récipient par dépression et qui contient notamment de la matière solide. Le récipient présente un orifice d'aspiration et un orifice de refoulement (17, 18) pour le fluide, un orifice d'évacuation par aspiration (23) permettant de vider le récipient (10) par aspiration, ainsi qu'un orifice d'aération (25) permettant d'aérer le récipient (10). Une unité de soupape de refoulement (20) est associée à l'orifice de refoulement (18) et une unité de soupape d'aération (26) pouvant être actionnée par un flotteur (28) est associée à l'orifice d'aération (25). Les deux unités de soupape (20, 26) peuvent s'ouvrir et se fermer automatiquement en fonction du niveau du récipient (10). Afin d'améliorer un tel récipient de manière à pouvoir y faire le vide pratiquement complètement et à pouvoir réduire la contrainte mécanique sur les unités de soupape de refoulement et d'aération (20, 26), le flotteur (28) peut, en fonction du niveau du récipient, être soumis à une force de retenue qui est opposée à la poussée du flotteur (28).
PCT/EP2006/006424 2006-07-01 2006-07-01 Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient WO2008003332A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/006424 WO2008003332A1 (fr) 2006-07-01 2006-07-01 Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2006/006424 WO2008003332A1 (fr) 2006-07-01 2006-07-01 Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient

Publications (1)

Publication Number Publication Date
WO2008003332A1 true WO2008003332A1 (fr) 2008-01-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/006424 WO2008003332A1 (fr) 2006-07-01 2006-07-01 Récipient conçu pour recevoir un fluide et appareil d'aspiration comportant un tel récipient

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589720B2 (en) 2019-09-11 2023-02-28 Techtronic Floor Care Technology Limited Floor cleaner

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474929A (en) * 1947-05-08 1949-07-05 Boler William Automatic valve and switch for hydraulic brakes
DE3032503A1 (de) * 1980-08-28 1982-03-04 Erhard 6000 Frankfurt Crema Behaelter zur aufnahme von schadstoffe enthaltenden medien
DE3522199A1 (de) * 1985-06-21 1987-01-02 Thyssen Nordseewerke Gmbh Behaelter zur aufnahme von schadstoffe enthaltenden medien mit hilfe von unterdruck
US5503184A (en) * 1991-11-12 1996-04-02 Itt Automotive Europe Gmbh Pressure control valve
DE19942187A1 (de) * 1999-09-03 2001-03-29 Oase Wuebker Gmbh & Co Kg Schlammsauger
DE10347473A1 (de) * 2003-10-01 2005-05-04 Kaercher Gmbh & Co Kg Alfred Sauggerät
WO2006021392A1 (fr) * 2004-08-24 2006-03-02 Oase Gmbh Aspirateur de liquides

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474929A (en) * 1947-05-08 1949-07-05 Boler William Automatic valve and switch for hydraulic brakes
DE3032503A1 (de) * 1980-08-28 1982-03-04 Erhard 6000 Frankfurt Crema Behaelter zur aufnahme von schadstoffe enthaltenden medien
DE3522199A1 (de) * 1985-06-21 1987-01-02 Thyssen Nordseewerke Gmbh Behaelter zur aufnahme von schadstoffe enthaltenden medien mit hilfe von unterdruck
US5503184A (en) * 1991-11-12 1996-04-02 Itt Automotive Europe Gmbh Pressure control valve
DE19942187A1 (de) * 1999-09-03 2001-03-29 Oase Wuebker Gmbh & Co Kg Schlammsauger
DE10347473A1 (de) * 2003-10-01 2005-05-04 Kaercher Gmbh & Co Kg Alfred Sauggerät
WO2006021392A1 (fr) * 2004-08-24 2006-03-02 Oase Gmbh Aspirateur de liquides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11589720B2 (en) 2019-09-11 2023-02-28 Techtronic Floor Care Technology Limited Floor cleaner

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