EP0460271B1 - Procédé et dispositif pour pomper du liquide d'un récipient - Google Patents

Procédé et dispositif pour pomper du liquide d'un récipient Download PDF

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Publication number
EP0460271B1
EP0460271B1 EP19900110870 EP90110870A EP0460271B1 EP 0460271 B1 EP0460271 B1 EP 0460271B1 EP 19900110870 EP19900110870 EP 19900110870 EP 90110870 A EP90110870 A EP 90110870A EP 0460271 B1 EP0460271 B1 EP 0460271B1
Authority
EP
European Patent Office
Prior art keywords
line
liquid
container
opening
gas mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900110870
Other languages
German (de)
English (en)
Other versions
EP0460271A1 (fr
Inventor
Lothar Galler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Roediger & Co Haustechnik GmbH
Original Assignee
Wilhelm Roediger & Co Haustechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilhelm Roediger & Co Haustechnik GmbH filed Critical Wilhelm Roediger & Co Haustechnik GmbH
Priority to DE59010093T priority Critical patent/DE59010093D1/de
Priority to EP19900110870 priority patent/EP0460271B1/fr
Publication of EP0460271A1 publication Critical patent/EP0460271A1/fr
Application granted granted Critical
Publication of EP0460271B1 publication Critical patent/EP0460271B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F3/00—Pumps using negative pressure acting directly on the liquid to be pumped

Definitions

  • the invention relates to a method and a device for suctioning liquid from a container according to the preambles of the independent claims 1 and 3.
  • Vacuum extraction systems are used to discharge waste water or other liquids from a ventilated container without a natural gradient being available. This is not only used in stationary areas, but also in mobile facilities such as Ships, trains or airplanes.
  • the liquid accumulated in a container, such as fecal water, is fed from a tank via a vacuum line to a further collecting container or the like, in order to then e.g. to be pumped out.
  • the liquid accumulated in the container can be sucked off via a riser pipe, which in turn can be connected to a vacuum source if necessary.
  • Shut-off devices such as valves are provided between the vacuum source and the riser pipe.
  • a liquid gas mixture is sucked in via the riser pipe. This means that liquid can accumulate in front of the shut-off device, even if the suction takes place at intervals, that is to say it is waited for liquids from the liquid gas mixture to have accumulated in front of the shut-off device, in order to then suck off further liquid by briefly opening the shut-off device.
  • a device for lifting liquids from a container by means of two lines is known, the suction openings of which run at the same level.
  • a septic tank is disposed of via a line that can be connected to a vacuum source.
  • the object of the present invention is to develop a method and a device according to the preamble of claim 1 or claim 3 so that without control engineering effort and with structurally simple measures it is ensured that despite sucking in a liquid gas mixture in the line suctioning the liquid only accumulates a small amount of residual liquid which, even when it solidifies, cannot lead to any impairment of the device, the undesired frequent “sucking in” being to be avoided.
  • the problem is to be solved that when liquid is sucked out of a ventilated container it is prevented that larger amounts of liquid remain in the line after the suctioning process has ended.
  • the teaching according to the invention ensures that the second line emptying into the first line ensures that when the undesired liquid / gas mixture is drawn in via the first line, further suction via the first line is prevented by essentially exclusively gasing via the second line is sucked in. Since this is lighter than the liquid gas mixture, it is largely ensured that only very little residual water can accumulate in the line leading to the negative pressure source, which water cannot lead to impairment even if, for example, solidification occurs at low temperatures. Consequently, no complex switching mechanisms are required to ensure that the liquid gas mixture is not sucked in, nor are special insulation measures or the like required in the area of the line in which liquid can accumulate.
  • a second line that is connected to the section of the first line that runs preferably in the container and that terminates above the opening of the first line is arranged.
  • the opening of the first line through which the liquid is suctioned off, lies between the opening of the second line and the bottom of the container.
  • the opening of the second line starting from the first line can now be closed with an element such as a floating body, specifically when the opening is covered with liquid.
  • the element i.e. the floating body, is e.g. surrounded by a picture like a cage, which starts from the second line.
  • the length of the second line and thus the weight of the water column present in this is now chosen so that the negative pressure prevailing in the first line is overcome and thus the weight of the liquid column pushes the element closing the opening away, so that the liquid from the second line flows into the container.
  • gas can be sucked in via the second line located higher at its opening, so that no further liquid gas mixture is conveyed into the suction line via the section of the first line running in the container. Should If the opening of the first line is still slightly submerged in the liquid, only a small water column can be observed in the area of the opening.
  • the teaching of the invention consequently provides an automatic and almost instantaneous switchover of the suction of a liquid gas mixture to the suction of only gas, which ensures that no significant amount of liquid can accumulate in the suction line, in particular before or after the shut-off device. At the same time, the unwanted suction, which causes unnecessary pressure losses in the vacuum system, is no longer necessary.
  • the amount of liquid accumulated in the second line and flowing back into the container has a volume which corresponds to that in order to refill the container to such an extent that the opening of the first line is closed again by liquid in such a way that further suction of the liquid gas mixture is avoided.
  • the container (10) can be a cuboid and cylindrical, ventilated container, in which e.g. via supply lines, not shown, in mobile devices such as Rail cars, ships or airplanes, existing washing facilities or toilet facilities, waste water (12) is accumulated.
  • a suction line (14) is provided which comprises a section (16) which runs essentially vertically inside the container (10) and a section (18) which extends outside the container (10) and which extends over a sink such as a siphon (20) can be connected to a vacuum source (connection 22), not shown.
  • a shut-off device e.g. Valve (24) is arranged, which is then opened when the container (10) is to be emptied.
  • a second line (28) extends via a connecting piece such as a T-piece (26) and extends approximately inside the container (10) runs parallel to the riser pipe (16).
  • the riser pipe (16) opens with its opening (30) at a shorter distance from the tank bottom (32) than the opening (34) of the second line (28).
  • the opening (34) of the line (28) can be closed with a float (36) as long as the opening (30) is immersed in the liquid (12).
  • the floating body (36) is surrounded by a receptacle such as a cage (38) which starts from the second line (28). This ensures that the float (36) can close the opening (34) to the desired extent.
  • the cage (38) has the necessary openings so that liquid can penetrate into the interior of the cage and so that the floating body (36) can close the opening (34).
  • the shape of the openings is chosen so that clogging by solids present in the liquid (12) is not possible. Should appropriate residues nevertheless get into the area between the float (36) and the opening (34), the suction effect there will result in a quasi self-cleaning of the float (36), which in turn can seal the opening (34) tightly.
  • the suction line (14) is connected to a vacuum source via the connection (22).
  • the shut-off device (24) is opened. Liquid is then sucked off through the opening (30) of the riser pipe (16).
  • the second line (28) is closed via the floating body (36). Nevertheless, liquid collects in the line (28) and flows into the line (28) via the connection (26).
  • the liquid level in the container (10) drops. If the liquid level is below the opening (34) of the line (28), this will continue to be closed by the floating body (36) due to the negative pressure prevailing in the suction line (14).
  • Suction line (14) Due to the pressure drop in the Suction line (14) can be closed by a control, not shown, the shut-off device (24).
  • the container (10) can then be refilled in order to carry out the previously described suction process after it has been filled.
  • the container (10) can have a height of 150 cm.
  • the diameter can be 80 to 100 cm.
  • the distance between the openings (30) and (32) only needs a few cm, e.g. 5 cm in order to enable the automatic switching of the suction from liquid gas mixture to gas proposed according to the invention.
  • the length of the line (28) should be selected so that the gravity pressure of the liquid column is greater than the negative pressure prevailing in the suction line (14) when the liquid gas mixture is drawn in.
  • the riser pipe (16) can have a bore provided with the reference number (40), through which it is to be ensured that the container (10) cannot be emptied if the section (18) running outside the container (14) ) e.g. has a leak in the depression or breaks.
  • the bore (40) prevents the lifting effect.
  • the bore (40) has a clear diameter which does not allow a noticeable reduction in pressure within the line (14) during suction, which would otherwise impair the suction effect when emptying the container (10).
  • the teaching according to the invention can be implemented if the first line runs outside the container and only opens into the bottom region thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)

Claims (10)

  1. Procédé pour aspirer un liquide (12) d'un récipient (10) au moyen d'une première canalisation (16) qui peut être raccordée à une source de dépression et dans laquelle débouche une seconde canalisation (28), procédé dans lequel des orifices (30, 34) dans lesdites première et seconde canalisations sont placés à proximité du fond (32) dudit récipient et dans lequel la première canalisation aspire un mélange de liquide et de gaz dès que le niveau dudit liquide dans ledit récipient descend et s'approche de l'orifice (30) de ladite première canalisation,
    caractérisé en ce
    qu'il comporte les étapes suivantes:
    - ladite seconde canalisation (28) débouchant dans ladite première canalisation (16) est obturée par un élément obturateur (36) qui flotte sur ledit liquide (12);
    - ladite première canalisation aspire pour l'essentiel du liquide alors que ladite seconde canalisation est simultanément remplie de liquide;
    - lorsque ladite première canalisation aspire le mélange de liquide et de gaz, la pression gravitationnelle provoquée par le liquide dans ladite seconde canalisation dépasse la dépression qui règne dans ladite première canalisation et de cette façon, le liquide repousse l'élément obturateur (36) de l'orifice (34) et permet ainsi au liquide de retourner en s'écoulant dans ledit récipient (10);
    - ensuite, du gaz est aspiré par ladite seconde canalisation ouverte, tout en évitant de continuer à aspirer un mélange de liquide et de gaz à travers ladite première canalisation.
  2. Procédé selon la revendication 1
    caractérisé en ce que
    le volume de liquide s'écoulant de ladite seconde canalisation (28) bouche ledit orifice (30) de ladite première canalisation (16) par du liquide afin d'empêcher l'aspiration continue d'un mélange de liquide et de gaz.
  3. Procédé pour aspirer un liquide (12) d'un récipient (10) à travers un orifice (30) placé à proximité du fond (32) dudit récipient au moyen d'une première canalisation (14, 16, 18) pouvant être raccordée à une source de dépression et dans laquelle débouche une seconde canalisation (28) dont l'orifice (34) est placé à proximité du fond dudit récipient,
    caractérisé en ce que
    ledit orifice (34) de ladite seconde canalisation (28) présente une distance supérieure par rapport au fond dudit récipient (10) que ledit orifice (30) de ladite première canalisation (16), et que ledit orifice (34) peut être obturé par un élément obturateur (36) en fonction de sa flottaison sur le niveau de liquide.
  4. Procédé selon la revendication 3
    caractérisé en ce que
    ladite seconde canalisation (28) est montée de façon parallèle ou sensiblement parallèle à la section (16) de ladite première canalisation qui se trouve à l'intérieur dudit récipient (10).
  5. Procédé au moins selon la revendication 3
    caractérisé en ce que
    ladite seconde canalisation (28) débouche sensiblement de façon verticale dans la section (16) de ladite première canalisation qui se trouve à l'intérieur dudit récipient (10).
  6. Procédé selon la revendication 3
    caractérisé en ce que
    ledit élément obturateur (36) a la forme d'un flotteur sphérique, logé dans une enveloppe, par exemple en forme de cage (38), qui est montée sur ladite seconde canalisation (28).
  7. Procédé selon la revendication 3
    caractérisé en ce que
    la pression qui règne dans ladite première canalisation (16) est plus faible que la pression gravitationnelle provoquée par la colonne de liquide se trouvant dans ladite seconde canalisation (28) lors d'une aspiration d'un mélange de liquide et de gaz à travers ladite première canalisation.
  8. Procédé au moins selon la revendication 3
    caractérisé en ce que
    la section (16) de ladite première canalisation qui se trouve à l'intérieur dudit récipient (10) est montée de façon sensiblement verticale.
  9. Procédé au moins selon la revendication 3
    caractérisé en ce
    qu'au moins une des canalisations présente une ouverture dans la région du bord supérieur dudit récipient (10).
  10. Procédé au moins selon la revendication 3
    caractérisé en ce que
    le liquide accumulé dans ladite seconde canalisation (28) et qui retourne en s'écoulant dans ledit récipient (10) possède un volume qui correspond au volume nécessaire pour remplir de liquide ledit récipient à un niveau plus élevé que celui dudit orifice (30) de ladite première canalisation (16).
EP19900110870 1990-06-08 1990-06-08 Procédé et dispositif pour pomper du liquide d'un récipient Expired - Lifetime EP0460271B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59010093T DE59010093D1 (de) 1990-06-08 1990-06-08 Verfahren und Vorrichtung zum Absaugen von Flüssigkeit aus einem Behälter
EP19900110870 EP0460271B1 (fr) 1990-06-08 1990-06-08 Procédé et dispositif pour pomper du liquide d'un récipient

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19900110870 EP0460271B1 (fr) 1990-06-08 1990-06-08 Procédé et dispositif pour pomper du liquide d'un récipient

Publications (2)

Publication Number Publication Date
EP0460271A1 EP0460271A1 (fr) 1991-12-11
EP0460271B1 true EP0460271B1 (fr) 1996-01-24

Family

ID=8204072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900110870 Expired - Lifetime EP0460271B1 (fr) 1990-06-08 1990-06-08 Procédé et dispositif pour pomper du liquide d'un récipient

Country Status (2)

Country Link
EP (1) EP0460271B1 (fr)
DE (1) DE59010093D1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2089691A (en) * 1934-04-04 1937-08-10 Salvage Process Corp Method and apparatus for transporting viscous liquids
GB2131098A (en) * 1982-12-02 1984-06-13 Alh Syst Ltd Pit latrine emptier
GB2198484A (en) * 1986-11-13 1988-06-15 Univ Queensland Syphons and liquid metering devices

Also Published As

Publication number Publication date
DE59010093D1 (de) 1996-03-07
EP0460271A1 (fr) 1991-12-11

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