US20220307495A1 - Device for sucking up liquid from the ground - Google Patents

Device for sucking up liquid from the ground Download PDF

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Publication number
US20220307495A1
US20220307495A1 US17/611,047 US202017611047A US2022307495A1 US 20220307495 A1 US20220307495 A1 US 20220307495A1 US 202017611047 A US202017611047 A US 202017611047A US 2022307495 A1 US2022307495 A1 US 2022307495A1
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United States
Prior art keywords
pump
enclosure
liquid
plane
suction
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US17/611,047
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English (en)
Inventor
Guy Delaisse
Erik GUILLEMIN
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AMS R&D Sas
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AMS R&D Sas
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Assigned to AMS R&D SAS reassignment AMS R&D SAS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DELAISSE, GUY, GUILLEMIN, Erik
Publication of US20220307495A1 publication Critical patent/US20220307495A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/20—Filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • 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
    • A47L7/0019—Details of the casing

Definitions

  • the present invention relates to the field of devices for sucking up liquid present on a floor.
  • the purpose of such filtering is to limit any risk of the pump becoming blocked by objects and/or particles situated in the surroundings of the device for sucking up liquid.
  • Such a device acts as a pump strainer screen.
  • a drawback of such devices is that they are liable to become clogged with objects and/or particles lying on the floor around the device.
  • An object of the present invention is to provide a device that is adapted to be in fluid flow connection with a pump in order to suck up liquid on a floor, the device limiting any risk of the pump becoming clogged.
  • the invention provides a device for sucking up liquid on a floor, the device having an outside wall defining a first enclosure that is open at least via openings formed through the outside wall so as to allow liquid to pass from outside the first enclosure to inside the first enclosure.
  • the device has a pipe presenting a first end arranged for putting into fluid flow connection with a liquid suction pump and a second end of the pipe is in fluid flow connection with said first enclosure so as to be able to suck liquid present in the first enclosure into said pipe.
  • the device of the invention is essentially characterized in that it includes an inside wall defining a second enclosure, the second enclosure being open at least via openings formed through the inside wall so as to allow liquid to pass from the first enclosure into the second enclosure and said second end of the pipe opening out into the inside of the second enclosure at a distance from the first enclosure.
  • the liquid is thus subjected to first filtering by the openings formed through the outside wall and to second filtering through openings formed through the inside wall.
  • Double filtering is thus performed and there is a buffer zone between the inside wall and the outside wall that greatly limits any risk of the suction pump being blocked by matter present outside the suction device.
  • the second enclosure is located inside the first enclosure. This makes it possible to perform double filtering with a device that is particularly compact, presenting a buffer storage zone between the inside wall and the outside wall.
  • FIG. 1 is a perspective view of a first embodiment of an assembly comprising a device of the invention for sucking up liquid on a floor and a liquid suction pump that is connected laterally to a first end of the pipe of the device, with the assembly in this embodiment forming a basement-drainer having the pump and the device placed side-by-side on the floor from which it is desired to suck up liquid;
  • FIG. 2 is a perspective view of the FIG. 1 pump used as a transfer pump, with the suction inlet of the pump in this embodiment connected to an external pipe for admitting liquid to the pump and with the discharge outlet of the pump connected to an external liquid discharge pipe;
  • FIG. 3 is a perspective view of the bottom face of a portion of the FIG. 1 device for sucking up liquid on a floor (shown without its bottom piece), with a portion of FIG. 3 being an enlargement showing slot-shaped openings made through inside and outside walls of the device;
  • FIG. 4 a is a cross-section view through a portion of the FIG. 1 device for sucking up liquid (shown without its bottom piece), with a portion of FIG. 4 a being an enlargement of the slot-shaped openings made through the inside and outside walls of the device (the liquid level Nx outside the first enclosure E 1 lies above the suction limit plane P 1 a for sucking through the inside wall 20 , at this stage, no liquid is yet being sucked towards the pump since the pump can only suck in gas above the level Nx);
  • FIG. 4 b is a view identical to the view of FIG. 4 a , but in this figure the liquid level Nx outside the first enclosure E 1 lies above the suction limit plane P 1 a for sucking through the inside wall 20 , at this stage, the liquid level Ny inside the second enclosure E 2 begins to rise under the effect of gas being sucked in by the dry self-priming pump, but the liquid has not yet reached the pump;
  • FIG. 4 c is a view identical to the view of FIGS. 4 a and 4 b , but in this figure the liquid level Nx outside the first enclosure E 1 lies a little above the suction limit plane P 1 a for sucking through the inside wall 20 , at this stage, the liquid level Ny inside the second enclosure E 2 has risen under the effect of gas being sucked in by the pump, and the liquid fills the second enclosure E 2 completely and reaches the pump;
  • FIG. 5 is is a cross-section view of the FIG. 1 device for sucking up liquid on the floor (shown with its bottom piece);
  • FIG. 6 is a cross-section view of the FIG. 1 device for sucking up liquid on a floor (shown with its bottom piece), with a portion of FIG. 6 being an enlargement showing the slot-shaped openings 11 , 21 made through the inside and outside walls of the device (it can be seen that the cross section of each of these openings becomes larger in the direction of fluid flow through these openings so as to limit any risk of internal clogging in any of these openings);
  • FIG. 7 is a cross-section view of the assembly shown in FIG. 2 , in which it can be seen that the pump includes an electric motor driving a movable part 45 with reciprocating motion between first and second walls 44 a and 44 b of the chamber 44 in order to cause the pump to suck in fluid;
  • a portion of FIG. 7 is an enlargement of the movable part 45 in which there can be seen circular first upstream and downstream lips 120 a and 121 a on a first side of the part 45 , and circular second upstream and downstream lips 120 b and 121 b on another side of the part 45 ;
  • FIG. 8 is a perspective view of a second embodiment of an assembly comprising a device of the invention for sucking up liquid on a floor and a liquid suction pump, the assembly being in its liquid transfer configuration in which the device of the invention is assembled to an attachment fitting of the pump that is remote from the suction inlet of the pump, the device of the invention forming a stand that supports the pump, and the pump being used for transferring fluid without the fluid and/or liquid passing through the device of the invention;
  • FIG. 9 is a perspective view of the second embodiment of an assembly including the device of the invention for sucking up liquid on a floor and a liquid suction pump, the assembly being in its basement-drainer configuration in which the device of the invention is in fluid flow connection with the suction inlet of the pump, the device of the invention forming a stand that supports the pump, and the pump being used for sucking up the liquid on the floor, the liquid passing through the device of the invention;
  • FIG. 10 is a section view of the FIG. 9 assembly on a plane X-X (the assembly is shown in its embodiment where the device forms a stand for supporting the pump), the assembly is shown in its basement-drainer configuration;
  • FIG. 11 is a section view of the movable part 45 in the chamber 44 , the first lips 120 a and 121 a being shown attached to a first side of the movable part 45 so as to bear against a first wall 44 a of the chamber 44 and the second lips 120 b and 121 b being shown attached to a second side of the movable part 45 so as to bear against a second wall 44 b of the chamber 44 ; and
  • FIG. 12 is a section view of the second wall 44 b of the chamber 44 of the pump, and in this embodiment the second lips 120 b and 121 b are not attached to the movable part 45 as they are in FIG. 11 , but they are attached exclusively to the second wall 44 b of the chamber 44 (this embodiment is like the embodiment shown in FIG. 7 in which the second wall 44 b carries the second lips 120 b and 121 b and in which the first wall 44 a carries the first lips 120 a and 121 a ).
  • the invention relates to a device 1 for sucking up liquid from a floor S.
  • the device 1 has an outside wall 10 defining a first enclosure E 1 that is open at least via openings 11 formed through the outside wall 10 so as to allow liquid to pass from outside the first enclosure E 1 to inside the first enclosure E 1 .
  • the outside wall 10 is in the shape of a bell with a cylindrical side, and the openings 11 formed through the outside wall are essentially in the shape of slots. Each opening 11 extends in a plane that is perpendicular to a plane via which the device 1 bears against the floor S.
  • the openings 11 are arranged in first and second groups of openings G 1 and G 2 , and a portion G 3 of the outside wall 10 extends between the first and second groups of openings G 1 and G 2 so as to separate them.
  • Each of the openings 11 in the first group G 1 is elongate in shape and extends in a direction that is common to all of these openings 11 of the first group G 1 .
  • these openings 11 of the first group G 1 are in the shape of mutually parallel slots.
  • Each of the openings 11 in the second group G 2 extends lengthwise along an arc, having a first terminal end located on a side edge of the outside wall 10 , and a second terminal end located on a top face of the outside wall 10 .
  • All of the openings in the first group G 1 open out towards the floor in order to suck in liquid as close as possible to the floor, while the openings 11 in the second group G 2 are spaced apart from the floor in order to be able to suck in liquid to be found above the device.
  • openings 11 are distributed over a major portion of the periphery of the outside wall 10 (specifically these openings 11 are distributed over at least 60% of the periphery of the outside wall 10 ) and they are preferably spaced apart from one another equidistantly in order to provide uniform suction of liquid towards the inside of the first enclosure E 1 . This serves to minimize any risk of clogging the openings 11 .
  • the device 1 also has a pipe 3 presenting a first end 3 a arranged for putting into fluid flow connection with a liquid suction pump 4 and a second end 3 b of the pipe 3 is in fluid flow connection with said first enclosure E 1 so as to be able to suck liquid present in the first enclosure E 1 into said pipe 3 .
  • the device 1 also has an inside wall 20 defining a second enclosure E 2 that is preferably located inside said first enclosure E 1 .
  • This second enclosure E 2 is open at least via openings 21 formed through the inside wall 20 so as to allow liquid to pass from the first enclosure E 1 into the second enclosure E 2 and into said second end 3 b of the pipe opening out into the inside of the second enclosure E 2 at a distance from the first enclosure E 1 .
  • this aspect of the device of the invention serves to perform double filtering, thereby reducing the risk of the pump becoming clogged by objects that are to be found around the device 1 .
  • the total liquid flow section through the openings in the outside wall 10 is at least 30% greater than the total liquid flow section through the openings in the inside wall 20 .
  • the minimum dimension X 1 of the openings 11 through the outside wall 10 is smaller than the minimum dimension X 2 of the openings 21 through the inside wall 20 .
  • the minimum dimension X 2 of the openings 21 through the inside wall 20 and the maximum dimension of the openings 21 through the inside wall 20 are selected to limit the size of particles capable of passing into the second enclosure E 2 .
  • the openings 21 formed through the inside wall 20 are formed exclusively between a suction limit plane P 1 a for sucking through the inside wall (i.e. an upper plane) and a bearing plane P 1 b (i.e. a plane lower than said upper plane when the device is placed on the floor in order to suck in liquid).
  • a suction limit plane P 1 a for sucking through the inside wall i.e. an upper plane
  • a bearing plane P 1 b i.e. a plane lower than said upper plane when the device is placed on the floor in order to suck in liquid.
  • the openings 11 formed through the outside wall 10 are formed exclusively between a suction limit plane P 2 a for sucking through the outside wall and a bearing plane P 2 b of the outside wall (the plane P 2 a being above the plane P 2 b when the device 1 is placed on the floor in order to suck in liquid).
  • At least some of the openings formed through the outside wall 10 are formed between the suction limit plane P 2 a for sucking through the outside wall and the suction limit plane P 1 a for sucking through the inside wall.
  • the outside wall 10 includes openings 11 that are above the level of the suction limit plane P 1 a for sucking through the inside wall 20 and below the level of the suction limit plane P 2 a for sucking through the outside wall, the outside wall serves to filter the liquid over a fraction of the outside wall that is above the level of the suction limit plane P 1 a for sucking through the inside wall.
  • Limiting the volume of air that is absorbed into the second enclosure E 2 serves to improve capacity for pumping liquid (the presence of air in the pipe 3 causes the efficiency of the pump to be lowered).
  • said second end 3 b of the pipe opens out into an inside portion of the second enclosure that is located entirely between the suction limit plane P 1 a for sucking through the inside wall and the suction limit plane P 2 b for sucking through the outside wall.
  • This characteristic enables the second end 3 b of the pipe to generate suction quickly in the second enclosure in order to cause the liquid level Ny therein to rise above the suction limit plane P 1 a , and to suck in quickly the liquid present on the floor.
  • This second end 3 b is oriented to define a main liquid suction axis via said second end 3 b that does not pass through any of the openings 21 formed through the inside wall 20 .
  • This characteristic helps make the flow of liquid passing through the various openings 21 more uniform, thereby limiting any risk of a low level of liquid appearing at a single one of the openings 21 with the resultant risk of air being sucked in through that single opening 21 (which would lead to deterioration in the operation of the pump).
  • FIGS. 1, 4 a , 4 b , 4 c , and 7 at least some of the openings 11 formed through the outside wall 10 extend between the suction limit plane P 1 a for sucking through the inside wall and the bearing plane P 1 b of the inside wall.
  • the openings 11 formed through the outside wall 10 are formed entirely between the suction limit plane P 2 a for sucking through the outside wall and the bearing plane P 2 b of the outside wall.
  • bearing plane P 1 b of the inside wall and the bearing plane P 2 b of the outside wall are preferably mutually coplanar in order to improve placement of the device on the floor S.
  • the suction limit plane P 1 a for sucking through the inside wall is spaced apart from the bearing plane P 1 b of the inside wall by a height of value no more than 1 centimeter (cm) and preferably no more than 4 millimeters (mm), more preferably no more than 2 mm, thus making it possible to limit the width of the openings 21 made through the inside wall 20 . Consequently, the distance between the floor (against which the inside wall 20 comes to bear) and the suction limit plane P 1 a is thus very small.
  • the device of the invention As soon as the level of the liquid, in this example water, on the floor S goes past the suction limit plane P 1 a through the inside wall 20 , i.e. as soon as it exceeds the above-mentioned height value, the device of the invention is then in a position to suck in liquid only and is thus fully effective.
  • the liquid level from which the liquid can be sucked in is particularly low.
  • the device preferably includes a bottom piece 22 that bears against the inside wall 20 .
  • This bottom piece 22 forms a bottom face for the second enclosure E 2 .
  • the bottom piece 22 is preferably solid, however it could optionally present recesses of dimensions that are less than or equal to the minimum dimensions X 2 of each of the openings 21 in the inside wall 20 .
  • the bottom piece 22 serves to limit the size of particles that can penetrate into the second enclosure E 2 , since only particles that are capable of passing through the openings 21 can penetrate into the enclosure E 2 .
  • this bottom piece 22 forms a soleplate of the device 1 that bears against the floor S.
  • the bottom piece 22 comprises a bottom plate 22 a forming the bottom face of the second enclosure E 2 , together with ribs 22 b.
  • Each of the ribs 22 b extends perpendicularly relative to said bottom plate 22 a.
  • Each of the ribs 22 b has a first terminal end placed facing the inside wall 20 and a second terminal end placed in a central zone of the second enclosure E 2 , into which the second end 3 b of the pipe 3 opens out.
  • each rib 22 b has a first function of stiffening the bottom piece 22 and a second function of guiding the flow of fluid inside the second enclosure E 2 as it goes from the inside wall 20 (where the liquid is admitted) to the central zone of the second enclosure E 2 (where the pipe 3 opens out).
  • the second enclosure E 2 is preferably open towards a bottom plane PF in which a major portion of said bottom piece 22 extends.
  • the bottom plane PF is the plane in which the bottom plate 22 a of the bottom piece 22 extends.
  • first enclosure E 1 open towards the bottom plane PF makes it possible to have an opening of this first enclosure directed towards the floor S from which it is desired to suck up liquid. While sucking in liquid via the pipe 3 , suction is generated in the first enclosure E 1 that tends to press the device 1 against the floor S.
  • the device preferably includes a rod 40 extending inside of the second enclosure E 2 , the rod 40 extending from a top face of the second enclosure E 2 to a central zone of said bottom piece 22 .
  • the rod 40 and the bottom piece 22 are mechanically assembled one against the other.
  • the bottom piece 22 forming the bottom face of the second enclosure E 2 is thus assembled to the remainder of the device via a centering rod 40 in contact against the central zone of the bottom piece.
  • This assembly technique is advantageous since it limits any risk of the bottom piece 22 bending, and consequently any risk of it breaking.
  • the bottom piece 22 lies between opposite bottom and top faces, with its top face facing into the second enclosure E 2 .
  • the bottom piece includes a peripheral margin having a chamfer 22 c extending to the top face of the bottom piece.
  • Some of the openings 21 formed through the inside wall 20 also present a chamfer 21 a with one face of the chamfer 21 a either being parallel to the chamfer 22 c at the peripheral margin of the bottom piece, or else not parallel to the chamfer 22 c , diverging apart from the chamfer 22 c on going from the outside towards the inside of the second enclosure E 2 .
  • the chamfer 22 c of the bottom piece extends as far as the bottom face of the bottom piece, thereby enabling the chamfer to come very close to the floor S on which the device 1 is placed.
  • all of the openings 21 formed through the inside wall 20 extend lengthwise in the same plane that is common to all of the openings 21 in the inside wall 20 .
  • these openings 21 are themselves horizontal along their respective lengths.
  • the flow section for liquid through a given opening 21 formed through the inside wall 20 is determined by its length and by its width.
  • openings 21 in the inside wall 20 extend longitudinally in the same plane, that means that while the device is in use, these openings 21 extend longitudinally essentially parallel to the floor S.
  • the invention also relates to an assembly 100 for sucking up liquid on a floor S, the assembly comprising:
  • the pump 4 is connected to a control unit UC for the pump 4 , itself connected to a probe 50 that is adapted to detect when a liquid level is reached relative to the pump 4 .
  • the control unit UC is arranged to cause the pump 4 to operate in response to the probe 50 detecting said liquid level.
  • the probe 50 may be fastened on the pump, or alternatively it may be fastened on the device 1 of the invention.
  • This fastening may be adjustable so as to adjust the detection level from which the probe detects the presence of liquid on the floor on which the device 1 is arranged.
  • the probe 50 in order to preserve the integrity of the probe 50 , the probe 50 may be fastened on the device in order to detect a liquid level being reached inside the device 1 , specifically a liquid level inside the first enclosure.
  • the liquid level detected by the probe 50 may be a liquid level Nx outside the first enclosure E 1 , or a liquid level inside the first enclosure E 1 .
  • the probe 50 may comprise at least two electrodes that are spaced apart from each other so as to be able to detect that a liquid level has been reached as a function of these electrodes measuring at least one electrical characteristic.
  • This electrical characteristic must vary depending on the nature of the fluid present between the electrodes.
  • the electrical characteristic measured by means of the electrodes may be an electric resistance between electrodes, an electric current between the electrodes, or an electric voltage between the electrodes.
  • control unit UC causes the electric motor to operate. This avoids causing the motor to operate for liquid levels that are too small and incompatible with self-priming of the pump, the pump being actuated only when it can begin to suck up the liquid on the floor.
  • the probe 50 is arranged so that the liquid level detected by the probe 50 lies above the suction limit plane P 1 a for suction through the inside wall, i.e. preferably for liquid on the floor S presenting depth lying in the range 2 mm to 4 mm.
  • control unit UC and the probe 50 are arranged so that after the liquid level has dropped below a predetermined level as detected by the probe 50 , operation of the motor is maintained by the control unit UC for a predetermined duration.
  • the pump continues to operate to lower the level of water on the floor and to avoid a level equilibrium point causing the pump to cycle through stopping and starting.
  • control unit UC or the level probe 50 may include a timer for timing said predetermined duration, the timer being triggered on detecting that the liquid level has dropped below said predetermined level.
  • the control unit UC allows the motor to stop when the predetermined duration times out.
  • this predetermined duration may be about 30 seconds.
  • timer may be integrated in the probe 50 , with the control unit UC then being programmed to stop the motor as soon as it receives a signal from the probe indicating that the predetermined duration has timed out.
  • the pump 4 is self-priming when dry, with the term “self-priming when dry” indicating that the pump has the ability to suck in dry air and create sufficient suction to suck up liquid on the floor and move the liquid into the chamber in order to discharge it via a discharge outlet 42 of the pump.
  • the pump 4 includes a suction inlet 41 and a discharge outlet 42 .
  • the first end 3 a of the pipe 3 of the device 1 is arranged to be releasably connected to said suction inlet 41 for fluid flow in such a manner that when the pipe 3 is connected to the suction inlet 41 of the pump 4 and a bearing face of the device 1 is placed on a plane floor S (from which it is desired to suck up liquid), the weight of the pump 4 opposes the device 1 moving away from said plane floor S.
  • the pump comprises a chamber 44 in fluid flow connection with the suction inlet 41 and with the discharge outlet 42 , a movable part 45 arranged inside the chamber 44 , and an electric motor 46 located outside the chamber 44 .
  • the electric motor and the control unit UC are powered via an electric power cable 60 .
  • the electric motor 46 is connected to the movable part 45 by a coupling mechanism in such a manner that the control unit UC actuating the electric motor 46 causes the movable part 45 to perform reciprocating motion relative to the chamber in order to move a fluid (a gas or a liquid) from the suction inlet 41 to the discharge outlet 42 .
  • the movable part 45 is in the shape of a disk that is hollow in its center and that is connected to the electric motor in such a manner as to be moved with rectilinear reciprocating motion in a direction perpendicular to the disk.
  • the hollow in the center of the disk enables a pumping effect to be obtained on both sides of the movable part with only one discharge outlet facing the hollow.
  • the movable part being a solid disk (without a hollow in its center), in which case the movable part 45 is capable of:
  • the movable part 45 is rigid, however it could be deformable in such a manner that actuating the electric motor 46 gives rise to a wave that propagates along the movable part 45 in order to move the fluid.
  • the movable part is an undulating diaphragm.
  • Such a diaphragm may be in the shape of a disk (the wave propagating radially relative to the disk) or in the shape of a strip (the wave propagating along the length of the strip) or in the shape of an elongate flexible tube that is peripherally stretchable (in which case the wave is a circular wave formed in the periphery of the tube and propagating along the length of the tube).
  • the pump may include an upstream lip 120 a and a downstream lip 121 a designed to deform as a function of the movement of the movable part 45 in such a manner as to create a first space 123 a between the lips 120 a , 121 a and the wall 44 a of the chamber 44 , which first space 123 a is expanded when the movable part 45 is moved away from the first wall 44 a of the chamber and is compressed when the movable part 45 is moved towards the first wall 44 a .
  • the part 45 alternates between being moved away from and towards the first wall 44 a when the control unit UC actuates the electric motor 46 .
  • the upstream lip 120 a is adapted to create sealing contact against the first wall 44 a when the pressure of the fluid in the space 123 a is higher than the pressure of the fluid upstream from the upstream lip 120 a.
  • downstream lip 121 a is adapted:
  • the space 123 a alternates between being in suction and open to the suction inlet 41 in order to suck in fluid (gas or liquid) therefrom, and being in compression and open to the discharge outlet 42 in order to expel the fluid therethrough.
  • the pump includes:
  • These circular first upstream and downstream lips 120 a and 121 a are placed between one of the sides of said movable part 45 and a first wall of the chamber 44 so as to define a first space 123 a between these circular first upstream and downstream lips 120 a and 121 a.
  • the first space 123 a defined between the lips 120 a and 121 a forms an angular space extending between a first wall 44 a of the chamber 44 and a first side of the movable part 45 that faces this first wall 44 a.
  • these circular first upstream and downstream lips 120 a and 121 a are such that over the first portion P 1 of said reciprocating motion of said movable part 45 relative to the chamber 44 , the circular first downstream lip 121 a provides sealing that prevents fluid from passing from said discharge outlet 42 to said first space 123 a , with the circular first upstream lip 120 a then allowing free passage for fluid between said first space 123 a and said suction inlet 41 .
  • the circular first upstream lip 120 a is spaced apart from one of said first wall 44 a and movable part 45 in order to generate a free fluid passage, i.e. a free space between said first space 123 a and said suction inlet 41 .
  • these circular first upstream and downstream lips 120 a and 121 a are such that over a second portion P 2 of said reciprocating motion of said movable part 45 relative to the chamber 44 , the circular first upstream lip 120 a provides sealing that prevents fluid from passing from said first space 123 a to said suction inlet 41 , with the circular first downstream lip 121 a being arranged:
  • the reciprocating motion of the movable part 45 causes fluid to be sucked from the suction inlet 41 into the first space 123 a during the first portion P 1 of the motion, and then causes the fluid to be expelled from the first space 123 a to the discharge outlet 42 over the second portion P 2 of said reciprocating motion.
  • the pump may include a second upstream lip 120 b and a second downstream lip 121 b designed to deform as a function of the movement of the movable part 45 in such a manner as to create a second space 123 b between the lips 120 b , 121 b and a second wall 44 b of the chamber 44 , which second space 123 b is expanded when the movable part 45 is moved away from the second wall 44 a of the chamber and is compressed when the movable part 45 is moved towards the second wall 44 a.
  • the part 45 is movable between the first and second walls 44 a and 44 b of the chamber 44 .
  • the part 45 thus alternates between being moved away from and towards the second wall 44 b when the control unit UC actuates the electric motor 46 .
  • the second upstream lip 120 b is adapted to create sealing contact against the second wall 44 b when the pressure of the fluid in the second space 123 b is higher than the pressure of the fluid upstream from the second upstream lip 120 b.
  • the second downstream lip 121 b is adapted:
  • the second space 123 b alternates between being in suction and open to the suction inlet 41 in order to suck in the fluid (gas or liquid) therefrom, and being in compression and open to the discharge outlet 42 in order to expel the fluid therethrough.
  • the circular second upstream lip 120 b is placed closer to the suction inlet 41 than it is to the discharge outlet 42 and the circular second downstream lip 121 b is placed closer to the discharge outlet 42 that it is to the suction inlet 41 .
  • These circular second upstream and downstream lips 120 b and 121 b are placed between one of the sides of said movable part 45 and a second wall 44 b of the chamber 44 so as to define a second space 123 b between these circular second upstream and downstream lips 120 b and 121 b.
  • the second space 123 b defined between the lips 120 b and 121 b forms an annular space extending between the second wall 44 b and the second side of the movable part 45 that is facing the second wall 44 b.
  • these circular second upstream and downstream lips 120 b and 121 b are such that over the third portion of said reciprocating motion of said movable part 45 relative to the chamber 44 , the circular second downstream lip 121 b provides sealing that prevents fluid from passing from said discharge outlet 42 to said second space 123 b , with the circular second upstream lip 120 b then allowing free passage for fluid between said second space 123 b and said suction inlet 41 .
  • this third portion of the motion of the movable part that is symmetrical to the first portion P 1 of the motion relative to a central position of the part 45 between the walls 44 a and 44 b.
  • the circular second upstream lip 120 b is spaced apart from one of said second wall 44 b and movable part 45 in order to generate a free fluid passage, i.e. a free space between said second space 123 b and said suction inlet 41 .
  • these circular second upstream and downstream lips 120 b and 121 b are such that over the fourth portion of said reciprocating motion of said movable part 45 relative to the chamber 44 , the circular second upstream lip 120 b provides sealing that prevents fluid from passing from said second space 123 b to said suction inlet 41 , with the circular second downstream lip 121 b then being arranged:
  • the reciprocating motion of the movable part 45 causes fluid to be sucked from the suction inlet 41 into the second space 123 a and then causes the fluid to be expelled from the second space 123 b to the discharge outlet 42 .
  • one of the faces of the movable part does not have any lip, then that is either because that face is not used for pumping (as applies to a movable part in the form of a disk without a hollow center), or else because it is the movable part that is deformable in order to establish sealing against the corresponding wall of the chamber.
  • Using only one lip on a side of the movable part serves only to oppose fluid return.
  • Using two lips on a side of the movable part serves to create the space between an upstream lip and a downstream lip in order to obtain a pump presenting a self-priming effect when dry.
  • a given lip can become pressed against a support of the lip (the chamber wall or the movable part) and act as a suction cup.
  • Each at least one fluid passage between a given lip and its support is such that when the lip comes to pressed against its support, fluid can continue to flow between the lip and its support. This avoids the suction cup effect.
  • each projection or channel extends longitudinally from one end of the given lip towards a junction point between that lip and its support.
  • the projections and/or channels are formed/carried solely by the support of the lip rather than by the lip itself, since the lip is then deformable in uniform manner.
  • Having a projection or a channel carried by a lip gives rise to preferred deformation zones over the lip, which can then give rise to head losses that are detrimental to the operation of the pump.
  • the projections or channels are formed on the support of the lip so as to form radii centered around an axis of symmetry of the given lip.
  • the pump 4 can be used on its own to transfer the fluid from its suction inlet to the discharge outlet, or alternatively it can be used in combination with the device of the invention in order to form a basement-drainer.
  • the fluid flow connection between the pump 4 and the device 1 is preferably made using a manually-operable coupling, i.e. a coupling that can be changed manually, without needing any tool, from a state in which the device is coupled with the pump to a state in which the device is uncoupled from the pump, and vice versa.
  • a manually-operable coupling i.e. a coupling that can be changed manually, without needing any tool, from a state in which the device is coupled with the pump to a state in which the device is uncoupled from the pump, and vice versa.
  • the coupling may comprise a quick coupling and/or a coupling with a loose nut that can be tightened in order to clamp the pipe to the pump without any need for the device 1 to be pivoted relative to the pump 4 .
  • the coupling includes an O-ring that provides sealing as soon as the pipe is engaged relative to the coupling over a depth of engagement that is greater than at least one pitch of the thread of the loose nut.
  • the basement-drainer configuration 100 is particularly practical, since the device 1 serves to reduce the minimum depth of liquid from which it is possible to begin pumping up the liquid present on the floor.
  • the device 1 enables the liquid present on the floor to be sucked up even when the depth of liquid on the floor is very shallow, preferably less than 4 mm, more preferably less than 2 mm.
  • the pump 4 In a first assembly configuration between the device 1 and the pump 4 , the pump 4 has legs 43 with ends that are coplanar with the bearing face of the device 1 when the first end 3 a of the pipe 3 of the device is in fluid flow connection with said suction inlet 41 .
  • the assembly 100 of the invention is particularly stable since its center of gravity is very close to the floor S.
  • the suction inlet 41 and the discharge outlet 42 of the pump 4 extend longitudinally in a common plane that is parallel to said bearing face of the device.
  • the pump 4 is assembled with the first end 3 a the pipe 3 of the device 1 in such a manner that when the bearing face of the device is positioned on a plane floor S so as to suck up liquid therefrom, the pump 4 is then supported by the device 1 .
  • the first end 3 a the pipe 3 is formed on a top face of the device 1 , with the device 1 being located between its bearing face and this top face.
  • the suction inlet 41 of the pump 4 extends longitudinally in an extension direction that is perpendicular relative to the longitudinal axis along which the discharge outlet 42 extends.
  • the suction inlet 41 extends longitudinally in an extension direction that is perpendicular relative to said bearing face of the device 1 on the floor.
  • the device 1 forms a stand for supporting the pump 4 on the floor.
  • the assembly is adapted to adopt selectively either a liquid transfer configuration ( FIG. 8 ) or a basement-drainer configuration ( FIGS. 9 and 10 ).
  • the device 1 is assembled on an attachment fitting 47 of the pump 4 that is situated at a distance from the suction inlet 41 of the pump. In this way, it is possible to transfer liquid using the pump without the liquid passing through the device.
  • the device 1 In the basement-drainer configuration ( FIGS. 9 and 10 ), the device 1 is in fluid flow connection with the suction inlet 41 of the pump, the device 1 then forming a stand supporting the pump and then being arranged to filter the liquid sucked up by the pump.
  • the attachment fitting 47 is a projection (specifically a threaded projection) that engages the first end 3 a of the pipe 3 of the device 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US17/611,047 2019-05-14 2020-05-13 Device for sucking up liquid from the ground Pending US20220307495A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FRFR1905028 2019-05-14
FR1905028A FR3096093B1 (fr) 2019-05-14 2019-05-14 Dispositif pour l’aspiration de liquide se trouvant sur un sol.
PCT/EP2020/063389 WO2020229569A1 (fr) 2019-05-14 2020-05-13 Dispositif pour l'aspiration de liquide se trouvant sur un sol

Publications (1)

Publication Number Publication Date
US20220307495A1 true US20220307495A1 (en) 2022-09-29

Family

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Application Number Title Priority Date Filing Date
US17/611,047 Pending US20220307495A1 (en) 2019-05-14 2020-05-13 Device for sucking up liquid from the ground

Country Status (5)

Country Link
US (1) US20220307495A1 (de)
EP (1) EP3969757B1 (de)
CN (1) CN114364878B (de)
FR (1) FR3096093B1 (de)
WO (1) WO2020229569A1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809277A (en) * 1956-10-17 1959-02-18 Megator Pumps Compressor Improvements in liquid strainers
DE2619403A1 (de) * 1976-05-03 1977-11-24 Albert Blum Tauchpumpenaggregat
JPH0395081U (de) * 1990-01-16 1991-09-27
FR2744769B1 (fr) * 1996-02-12 1999-02-12 Drevet Jean Baptiste Circulateur de fluide a membrane vibrante
JP3095081U (ja) * 2002-12-11 2003-07-18 時男 園田 埋め込みインサート一体型ｌ金物
EP2740940B1 (de) * 2012-12-04 2020-03-04 Einhell Germany AG Tauchpumpe
DE102015007100A1 (de) * 2015-06-08 2016-12-08 Gea Tuchenhagen Gmbh Selbstansaugende Pumpenaggregation

Also Published As

Publication number Publication date
FR3096093B1 (fr) 2023-02-24
WO2020229569A1 (fr) 2020-11-19
FR3096093A1 (fr) 2020-11-20
EP3969757C0 (de) 2024-05-01
EP3969757A1 (de) 2022-03-23
CN114364878A (zh) 2022-04-15
CN114364878B (zh) 2023-10-31
EP3969757B1 (de) 2024-05-01

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