EP3969757A1

EP3969757A1 - Device for sucking up liquid from the ground

Info

Publication number: EP3969757A1
Application number: EP20724179.5A
Authority: EP
Inventors: Guy Delaisse; Erik GUILLEMIN
Original assignee: AMS R&D Sas
Current assignee: AMS R&D Sas
Priority date: 2019-05-14
Filing date: 2020-05-13
Publication date: 2022-03-23
Anticipated expiration: 2040-05-13
Also published as: CN114364878B; EP3969757B1; US20220307495A1; EP3969757C0; FR3096093A1; CN114364878A; WO2020229569A1; FR3096093B1

Abstract

The invention relates to a device (1) for sucking up liquid from the ground (S), the device (1) comprising an exterior wall (10) defining a first enclosure (E1) that is open at least via cutouts (11) for the liquid to pass into the interior of this first enclosure (E1), the device (1) having a pipe (3) fluidically connected to a liquid suction pump (4) of said first enclosure (E1). The device has an interior wall (20) defining a second enclosure (E2), this second enclosure (E2) being open at least via cutouts (21) formed through the interior wall (20) for the liquid to pass from the first enclosure (E1) to the second enclosure (E2), the pipe leading into this second enclosure (E2).

Description

DEVICE FOR SUCTION OF LIQUID CONTAINED ON

A SOIL

The present invention relates to the field of devices for the suction of liquid located on a floor.

BACKGROUND OF THE INVENTION

Devices are adapted to be fluidly connected to a pump in order to be able to suck a liquid located on the ground while filtering this liquid.

The purpose of this filtration is to limit the risk of the pump blocking by objects / particles located in the environment of the device for suctioning liquid.

Such a device acts as a pump strainer. A disadvantage of these devices is that they are subject to clogging by objects / particles resting on the ground around the device.

OBJECT OF THE INVENTION

An object of the present invention is to provide a device suitable for being fluidly connected to a pump for the suction of liquid from a ground, this device limiting the risk of the pump clogging.

SUMMARY OF THE INVENTION

To this end, according to the invention, a device is proposed for the suction of liquid from a floor comprising an outer wall defining a first enclosure open at least via recesses formed through this outer wall to allow the passage of liquid from the exterior of the first enclosure towards the interior of this first enclosure.

The device according to the invention comprises a pipe having a first end arranged to be fluidly connected with a liquid suction pump and a second end of the pipe fluidly connected to said first enclosure to be able to sucking the liquid located in this first enclosure towards said pipe.

This device according to the invention is essentially characterized in that it comprises an interior wall defining a second enclosure, this second enclosure being open at least via recesses formed through the interior wall to allow the passage of liquid from the first enclosure. towards the second enclosure and said second end of the pipe opening inside this second enclosure, at a distance from the first enclosure.

In this way, the liquid sucked from the outside of the first enclosure towards said pipe passes successively through the first enclosure and then through the second enclosure.

This liquid thus undergoes a first filtration thanks to the recesses formed through the outer wall and a second filtration through the recesses formed through the interior wall.

There is thus a double filtration and a buffer zone between the inner wall and the outer wall of which greatly limits the risk of the suction pump clogging by materials present outside the suction device.

Preferably, the second enclosure is placed inside the first enclosure. This makes it possible to achieve this double filtration with a particularly compact device having a buffer storage zone between the inner wall and the outer wall.

BRIEF DESCRIPTION OF THE DRAWINGS

Other characteristics and advantages of the invention will emerge clearly from the description which is given hereinafter, by way of indication and in no way limiting, with reference to the appended drawings, in which: [Fig. 1] Figure 1 is a perspective view of a first embodiment of an assembly comprising a device for the suction of liquid on a floor according to the invention and a liquid suction pump which is connected laterally to a first end of the pipe of the device, in this embodiment the assembly forms a cellar vacuum, the pump and the device of which are placed side by side on the ground where the liquid is to be sucked up;

[Fig. 2] FIG. 2 is a perspective view of the pump of FIG. 1 used as a transfer pump, in this embodiment the suction inlet of the pump is connected to an external liquid inlet pipe towards the pump and the pump delivery outlet is connected to an external liquid delivery pipe;

[Fig. 3] figure 3 is a perspective view of a lower face of a part of the device for the suction of liquid on a floor illustrated in figure 1 (without its bottom), an area of this figure 3 is an enlargement at the level of the slotted recesses made through the inner and outer walls of the device;

[Fig. 4a] figure 4a is a cross-sectional view of part of the device for the suction of liquid on a floor illustrated in figure 1 (without its bottom), an area of this figure 4a is an enlargement at the level of the recesses in slots made through the inner and outer walls of the device (the liquid level Nx outside the first enclosure El passes above the suction limit plane Pla through the inner wall 20, at this stage, there is still no suction of liquid towards the pump because the pump can only suck the gases above the level Nx);

[Fig. 4b] FIG. 4b is a view identical to that of FIG. 4a but here the level of liquid Nx outside the first enclosure El passes above the limit suction plane Pla through the interior wall 20, at this stage, the level of liquid Ny in the second enclosure E2 begins to rise under the effect of a gas suction by the dry self-priming pump, the liquid does not yet reach the level of the pump;

[Fig. 4c] FIG. 4c is a view identical to that of FIGS. 4a and 4b but here the level of liquid Nx outside the first enclosure El passes slightly above the limit suction plane Pla through the interior wall 20, at this stage, the level of liquid Ny in the second enclosure E2 is mounted under the effect of a gas suction by the pump and this liquid completely fills the second enclosure E2 and arrives at the level of the pump;

[Fig. 5] Figure 5 is a cross-sectional view of the device for sucking liquid from a floor shown in Figure 1 (with its bottom);

[Fig. 6] figure 6 is a cross-sectional view of the device for sucking liquid from a floor shown in figure 1 (with its bottom), an area of this figure 6 is an enlargement at the level of the slotted recesses 11, 21 carried out through inner and outer walls of the device (it can be seen that the cross section of each of these recesses increases in a direction of flow of the fluid through these recesses so as to limit the risk of internal clogging of each of these recesses);

[Fig. 7] Figure 7 is a cross-sectional view of the assembly illustrated in Figure 2 where it is seen that the pump comprises an electric motor causing reciprocating movement of a movable part 45 between first and second walls 44a, 44b of the chamber 44 to generate a suction of fluid by the pump; A zone of this FIG. 7 is an enlargement at the level of this movable part 45 where one sees first upstream and downstream circular lips 120a, 121a on a first side of the part 45 and of the second upstream and downstream circular lips 120b, 121b on the other side of room 45;

[Fig. 8] FIG. 8 is a perspective view of a second embodiment of an assembly comprising a device for the suction of liquid from a ground according to the invention and a liquid suction pump, the assembly being in its liquid transfer configuration, in which the device according to the invention is assembled on an attachment of the pump at a distance from the suction inlet of the pump, this device according to the invention forming a support foot for the pump. pump and the pump being used to transfer fluid without this fluid / liquid passing through the device according to the invention;

[Fig. 9] FIG. 9 is a perspective view of the second embodiment of the assembly comprising the device for sucking liquid from a floor according to the invention, the assembly being in its empty cellar configuration in which the device according to the invention is fluidly connected to the suction inlet of the pump, this device according to invention forming a support foot for the pump and the pump being used to suck liquid from the ground, this liquid passing through the device according to the invention;

[Fig. 10] Figure 10 is a sectional view along a plane XX of the assembly of Figure 9 (the assembly is here in the embodiment where the device forms a support foot of the pump), the assembly is here in its empty cellar configuration;

[Fig. 11] Figure 11 is a sectional view of the movable part 45 in the chamber 44, the first lips 120a, 121a being here attached to a first side of the movable part 45 to come to bear against a first wall 44a of the chamber 44 and the second lips 120b, 121b being attached to a second side of the movable part 45 to bear against a second wall 44b of the chamber 44;

[Fig. 12] Figure 12 is a sectional view of the second wall 44b of the chamber 44 of the pump, in this embodiment, the second lips 120b, 121b are not attached to the movable part 45 as in Figure 11, but they are exclusively attached to the second wall 44b of the chamber 44 (this mode is in accordance with that shown in FIG. 7 where the second wall 44b carries the second lips 120b, 121b and where the first wall 44a carries the first lips 120a, 121a). DETAILED DESCRIPTION OF THE INVENTION

In general and with reference to Figures 1, 3, 4, 5, 6, 7, 9 and 10, the invention relates to a device 1 for sucking liquid from a floor S.

This device 1 comprises an outer wall 10 defining a first enclosure El open at least via recesses 11 formed through this outer wall 10 to allow the passage of liquid from the outside of the first enclosure El to the inside of this first. pregnant El.

This outer wall 10 has the shape of a bell with a cylindrical edge and the recesses 11 formed through the outer wall are essentially in the form of slits. Each recess 11 extends in a plane perpendicular to a bearing plane of the device 1 on the ground S.

These recesses 11 are here arranged in first and second groups of recesses G1, G2 and a portion G3 of the outer wall 10 extends between these first and second groups of recesses G1, G2 to separate them.

Each of the recesses 11 of the first group G1 has an elongated shape and extends in a direction common to all of these recesses 11 of the first group G1.

In this case, these recesses 11 of the first group G1 in the form of mutually parallel slots.

Each of the recesses 11 of the second group G2 extends in length along an arc and has a first end end positioned on a lateral edge of the outer wall 10 and a second end end positioned on an upper face of the outer wall 10.

The recesses of the first group Gl all open towards the ground to draw liquid there as closely as possible floor and the recesses 11 of the second group G2 are remote from the floor to be able to suck liquid located above the device.

These recesses 11 are distributed over a major part of the periphery of the outer wall 10 (in this case these recesses 11 are distributed over at least 60% of the periphery of the outer wall 10) and are preferably equidistant from each other in order to be able to achieve uniform suction of liquid towards the inside of the first enclosure E1. The risk of clogging of the recesses 11 is thus minimized.

The device 1 also comprises a pipe 3 having a first end 3a arranged to be fluidly connected with a liquid suction pump 4 and a second end 3b of the pipe 3 fluidly connected to said first enclosure E1 in order to be able to suck liquid located in this first enclosure El to said pipe 3.

The device 1 also comprises an interior wall 20 defining a second enclosure E2 which is preferably placed inside said first enclosure El. This second enclosure E2 is open at least via recesses 21 formed through the interior wall 20 to allow the passage of liquid from the first enclosure El to the second enclosure E2 and said second end 3b of the pipe opening inside this second enclosure E2, at a distance from the first enclosure El.

As explained previously, this aspect of the device according to the invention makes it possible to achieve double filtration which reduces the risk of the pump clogging by objects located around the device 1.

Preferably, the total section of liquid passage via the recesses of the outer wall 10 is greater by at least 30% than the total section of liquid passage through the recesses of the inner wall 20.

This makes it possible to limit the risk of clogging of the outer wall because the depression between the inner and outer faces of the outer wall 10 is limited with respect to the depression which exists between the inner and outer faces of the inner wall 20.

This limits the risk of aspiration of objects located around the outer wall 10.

Preferably, as can be understood from FIG. 4a, the minimum dimension XI of the recesses 11 through the exterior wall 10 is less than the minimum dimension X2 of the recesses 21 through the interior wall 20. Thus, in the event of passage of particles through the recesses 11 of the exterior wall 10, it is certain that these particles will be able to pass through the recesses 21 of the interior wall 20, which avoids the risk of the first enclosure E1 becoming clogged. Furthermore, the minimum dimension X2 recesses 21 through the interior wall 20 and the maximum dimension of the recesses 21 through the interior wall 20 are selected to limit the size of the particles liable to pass into the second enclosure E2.

The recesses 21 formed through the inner wall 20 are exclusively formed between a suction limit plane through the inner wall Pla (that is to say an upper plane) and a bearing plane of the inner wall Pib (that is to say a lower plane with respect to said upper plane when the device is placed on the ground to suck liquid therein).

The recesses 11 formed through the outer wall 10 are exclusively formed between a limit suction plane through the outer wall P2a and a bearing plane of the outer wall P2b (the plane P2a being above the plane P2b when the device 1 is placed on the ground to suck liquid therein).

At least some of the recesses formed through the outer wall 10 are formed between the suction limit plane through the outer wall P2a and the suction limit plane through the inner wall Pla.

As the outer wall 10 has recesses 11 which are above the level of the suction limit plane Pla through the inner wall 20 and below the level of the suction limit plane through the outer wall P2a, the outer wall makes it possible to filter liquid on a portion of this outer wall which is above the level of the limit suction plane Pla of the inner wall.

This makes it possible to reduce the risk of clogging of the recesses formed through the outer wall.

Moreover, thanks to this characteristic, when the device is arranged so that the bearing plane of the inner wall Pib is below the suction limit plane Pla through the inner wall 20 and that the liquid level Nx outside the first enclosure passes above the limit suction plane Pla, it is then certain that the recesses 21 formed through the inner wall are all immersed in the liquid and that they do not open out to the 'outdoors.

It then suffices to apply a vacuum in the pipe 3 to generate a vacuum in the second enclosure E2 and thus force the suction of liquid while avoiding the passage of air / gas to this second enclosure E2.

Limiting the volume of air absorbed to the second enclosure E2 makes it possible to improve the liquid pumping capacity (the presence of air in pipe 3 induces a drop in pump efficiency).

As seen in Figures 2 to 7 and 10, said second end 3b of the pipe opens into an internal portion of the second enclosure which is exclusively located between the limit plane of suction through the internal wall Pla and the plane suction limit through the outer wall P2b. This feature allows the second end 3b of the pipe to quickly generate a vacuum in the second enclosure to cause the level Ny of liquid to rise above the suction limit plane Pla, and quickly suck up the liquid lying on the ground. .

This second end 3b is oriented to define a main axis of liquid suction via this second end 3b which does not pass through any of the recesses 21 formed through the inner wall 20. This characteristic promotes homogenization of the flow of liquid flowing. through the various recesses 21, which limits the risk of a low liquid level appearing at the level of only one of the recesses 21 and a risk of air being sucked in via this single recess 21 (this would lead to degradation pump operation).

As seen in Figures 1, 4a, 4b, 4c and 7, at least some of the recesses 11 formed through the outer wall 10 extend between the suction limit plane through the inner wall Pla and the support plane of the interior wall Pib.

Thus, as soon as the liquid begins to spread over the ground S, it can quickly reach the interior of the second enclosure E2. It is thus possible to start pumping the liquid as soon as possible, in this case, as soon as the water level Ny inside the second enclosure E2 passes above the limit suction plane through the interior wall. Pla. More generally, the recesses 11 formed through the outer wall 10 are exclusively formed between the limit suction plane through the outer wall P2a and the bearing plane of the outer wall P2b.

It should be noted that the bearing plane of the inner wall Pib and the bearing plane of the outer wall P2b are preferably coplanar with each other to improve the resistance of the device on the ground S.

Likewise, the said:

- suction limit plane through the interior wall PIa;

- support plane of the interior wall Pib;

- suction limit plane through the outer wall P2a; and

- support plane of the outer wall P2b; are planes preferably parallel to each other and are designed to be horizontal when the device is placed on a horizontal plane ground in order to suck liquid therein.

Preferably, the suction limit plane through the inner wall Pla is spaced from the bearing plane of the inner wall Pib by a height value of at most 1 centimeter and preferably at most 4 millimeters, preferably d 'at most 2 mm, which makes it possible to limit the width of the recesses 21 made through the inner wall 20. Consequently, the distance between the ground (against which the inner wall 20 bears) and the limit plane of Pla suction is thus very low.

As soon as the liquid level, here water, on the ground S exceeds the suction limit plane Pla through the inner wall 20, that is to say as soon as it exceeds the pre height value mentioned, the device according to the invention is then able to suck only liquid and it is then fully effective.

Thus, thanks to the invention the liquid level from which the liquid can be sucked is particularly low.

It is thus possible to reduce the residual level of liquid on the floor at the end of the suction.

As can be seen in particular from FIGS. 5, 6, 7, the device preferably comprises a bottom 22 bearing against the inner wall 20.

This bottom 22 forms a lower face of the second enclosure E2.

This bottom 22 is preferably solid, but it may optionally have recesses of dimensions less than or equal to the minimum dimensions X2 of each of the recesses 21 of the inner wall 20.

Thanks to this bottom 22, the size of the particles capable of penetrating towards the second enclosure E2 is limited since only particles capable of passing through the recesses 21 can penetrate into this enclosure E2.

The risk of blockage in the pump connected to line 3 is thus particularly limited.

Preferably, this bottom 22 forms a support foot of the device 1 on the ground S.

This bottom 22 comprises a lower plate 22a forming the lower face of the second enclosure E2 and ribs 22b.

Each of these ribs 22b extends perpendicularly relative to said lower plate 22a.

Each of these ribs 22b has a first terminal end disposed opposite the inner wall 20 and a second terminal end disposed in a central zone of the second enclosure E2 towards which the second end 3b of the pipe opens

3.

In this embodiment, each rib 22b has a first function of stiffening the bottom 22 and a second function of guiding the flow of fluid inside the second enclosure E2 going from the inner wall 20 where the liquid is admitted towards a central zone of the second enclosure E2 into which the pipe 3 emerges.

A laminar flow of the liquid towards the pipe 3 is thus promoted, which limits the pressure drop induced by the device according to the invention.

As can be understood from these same figures 5, 6, 7, the second enclosure E2 is preferably open towards a bottom plane PF in which a major part of said bottom 22 extends.

The bottom plane PF is here the plane in which the bottom plate 22a extends from the bottom 22.

The fact that the first enclosure El is open in the direction of the bottom plane PF makes it possible to have an opening of this first enclosure oriented towards the ground S on which it is desired to suck the liquid. During the suction of liquid via line 3, a vacuum is generated in the first enclosure El which tends to press the device 1 against the ground S.

This limits the risk of accidental tilting of the device 1 since the outer wall 10 has a tendency to be pressed towards the ground S.

The risk of particles passing between the outer wall 10 and the floor S on which the device is pressed is thus greatly limited.

The device preferably comprises a rod 40 extending inside the second enclosure E2, this rod 40 extending from an upper face from this second enclosure E2 to a central zone of said bottom 22.

The rod 40 and the bottom 22 are being assembled mechanically against each other.

The bottom 22 forming the lower face of the second enclosure E2 is thus assembled to the rest of the device via a centering rod 40 in contact against the central zone of the bottom.

This method of assembly is advantageous because it limits the risk of the bottom 22 bending and therefore the risk of its breaking.

The bottom 22 has lower and upper faces arranged on either side of the bottom, the upper face being opposite the second enclosure E2.

Preferably, the bottom comprises a peripheral edge having a chamfer 22c extending to the upper face of the bottom.

Some of the recesses 21 formed through the inner wall 20 also have a chamfer 21a, a chamfer face 21a of which is either parallel to the chamfer 22c of the peripheral edge of the bottom, or not parallel to the chamfer 22c away from this chamfer 22c going from the outside to the inside of the second enclosure E2.

Since the chamfer 22c on the edge of the bottom 22 is parallel to the chamfers 21a of the recesses of the interior wall 20, the flow of fluid through the recesses 21 is improved.

Preferably, the chamfer of the bottom 22c extends to the underside of the bottom, which allows this chamfer to come as close as possible to the ground S on which the device 1 is placed.

This allows the liquid located on the floor S to be sucked up at the junction between this chamfer 22c and the underside of the bottom 22. This can be beneficial in lowering the level of liquid from which to start pumping.

Preferably, all the recesses 21 formed through the interior wall 20 extend lengthwise in the same plane which is common to all the recesses 21 of the interior wall 20. In other words, when the device is placed. on the horizontal plane ground, these recesses 21 are horizontal according to their respective lengths.

The section of passage of liquid through a given recess 21 made through the inner wall 20 is determined by its length and by its width.

As the recesses 21 of the inner wall 20 extend longitudinally in the same plane, this means that, when using the device, these recesses 21 are essentially elongated parallel to the floor S.

Thus, as soon as the liquid level passes above all of the recesses 21, it is known that it is possible to suck essentially liquid without air.

The maximum liquid suction efficiency is thus reached quickly, as soon as the liquid level passes above all of the recesses 21, in this case above the widths of each of these recesses 21.

This characteristic makes it possible to lower the level from which the device according to the invention makes it possible to suck only liquid.

As indicated above, and illustrated in Figures 1, 7, 8, 9 and 10, the invention also relates to an assembly 100 for the suction of liquid from a floor S comprising:

the device 1 according to any one of the embodiments described; and - A liquid suction pump (4) connected to said first end (3b) of the pipe (3).

The pump 4 is connected to a control unit UC of the pump 4 itself connected to a probe 50 suitable for detecting the reaching of a liquid level with respect to the pump 4.

This control unit UC is arranged to control the operation of the pump 4 in response to the detection of said liquid level by the probe 50.

As illustrated in Figures 1 and 2, the probe 50 can be fixed to the pump or alternatively it can be fixed to the device 1 according to the invention.

This fixing can be adjustable so as to adjust a detection level from which the probe detects the presence of liquid on the ground where the device 1 is placed.

In some embodiments, in order to preserve the integrity of the probe 50, the probe 50 can be attached to the device to detect the reaching of a liquid level inside the device 1, in this case either a liquid level inside the first enclosure.

In summary, the level of liquid detected by the probe 50 can be a level of liquid Nx outside the first enclosure E1 or a level of liquid in the first enclosure E1.

As illustrated in Figures 1 and 2, the probe 50 may include at least two electrodes spaced from each other to be able to detect the reaching of a liquid level as a function of a measurement of at least one characteristic. electric made with these electrodes.

This electrical characteristic must be variable as a function of the nature of the fluid located between these electrodes. For example, this electrical characteristic measured using these electrodes can be an electrical resistance between these electrodes, a current intensity between these electrodes, an electrical voltage between these electrodes.

Thus, as soon as the liquid comes into contact with these electrodes, there is a variation in the measured electrical characteristic and it is thus possible to measure the attainment of the liquid level. The control unit UC can, as a function of this measurement, control the operation of the electric motor. This avoids having the engine operate for liquid levels that are too low and incompatible with the self-priming of the pump, the pump being actuated only when it can begin to suck liquid from the ground.

Preferably, the probe 50 can be arranged so that the liquid level detected by the probe 50 is above said suction limit plane through the internal wall Pla, that is to say preferably between 2 and 4 mm height of liquid above ground S.

Preferably, the control unit UC and the probe 50 are arranged so that after a drop in the level of liquid below a predetermined level detected by the probe 50, the operation of the engine is maintained by the control unit. UC for a predetermined time.

Thus, the pump continues to run to lower the water level on the ground and avoid a level equilibrium point causing the pump to cycle between on and off.

For this, the control unit UC or the level probe 50 may include a time delay counting down said predetermined duration, this time delay being triggered as from the detection of the drop in temperature. liquid level below said predetermined level.

The stopping of the engine being authorized by the control unit UC at the end of the countdown of the predetermined period. This predetermined duration is for example of the order of 30 seconds.

The pump's running time without water is thus minimized so as not to alter it.

It should be noted that the time delay can be integrated into the probe 50 and, in this case, the control unit UC is programmed to stop the motor as soon as it receives a signal from the probe indicating the end of the time count. predetermined.

This pump 4 is dry self-priming, the term dry self-priming pump denoting the ability of the pump to suck dry air and create sufficient vacuum to suck liquid off the ground and move it up to the chamber to deliver it via a delivery outlet 42 of the pump.

The pump 4 has a suction inlet 41 and a delivery outlet 42.

The first end 3a of the pipe 3 of the device 1 is arranged to be fluidly and removably connected to said suction inlet 41 such that when this pipe 3 is connected to the suction inlet 41 of the pump 4 and that a bearing face of the device 1 is placed on a plane floor S (where it is desired to suck liquid), the pump 4 under the effect of its own weight opposes the removal of the device 1 with respect to said S plane ground.

The pump comprises a chamber 44 fluidly connected to the suction inlet 41 and to the delivery outlet 42, a movable part 45 disposed in the chamber 44 and an electric motor 46 located outside the chamber 44.

The electric motor and the UC control unit are supplied with energy via a power supply cable 60.

The electric motor 46 is connected to the movable part 45 by a coupling mechanism such that the actuation of the electric motor 46 by the control unit UC induces a movement of the movable part 45 relative to the chamber to move. a fluid (gas or liquid) from the suction inlet 41 to the delivery outlet 42.

The movable part 45 here has the form of a disc hollowed out at its center connected to the electric motor so as to be moved in an alternating rectilinear movement in a direction perpendicular to the disc.

The recess of the disc at its center makes it possible to have a pumping effect on both sides of the moving part with a single discharge outlet facing this recess.

It is however conceivable that the moving part 45 is a solid disc (not hollowed out in its center) and in this case, this moving part can allow:

- either a pumping effect of only one on both sides of the moving part (in this case there is only a need for a single discharge outlet);

- or a pumping effect on both sides of the moving part (in this case, a discharge outlet must be provided for each side of the moving part).

This moving part 45 is here rigid but it could be deformable so that the actuation of the electric motor 46 induces a wave propagating along the moving part 45 to move the fluid.

In this case, this moving part is an undulating membrane.

Such a membrane can be discoidal (the wave propagating along the radius of this disc) or in the form of a ribbon (the wave propagating along the length of the tape) or in the form of a flexible tube which can be extended along its periphery and elongated (in this case the wave is a circular wave formed along the periphery of the tube and propagating along the length of this tube).

In each of these embodiments, the pump may include an upstream lip 120a and a downstream lip 121a provided to deform according to the displacement of the movable part 45 so as to create between these lips 120a, 121a and the wall 44a of the chamber 44, a first space 123a expandable when moving part 45 away from the first wall 44a of the chamber and compressible when moving part 45 towards the first wall 44a. The part 45 is alternately moved away from and closer to the first wall 44a during actuation of the electric motor 46 by the control unit UC.

The upstream lip 120a is adapted to create a sealed contact against the first wall 44a when the fluid pressure in the space 123a exceeds a fluid pressure upstream of this upstream lip 120a.

Conversely, the downstream lip 121a is suitable for:

- On the one hand, create a sealed contact against the first wall 44a as long as the fluid pressure in the space 123a is lower than a fluid pressure downstream of this downstream lip 121a; and to

- On the other hand, move away from the first wall 44a when the fluid pressure in the space 123a is greater than the fluid pressure downstream of this downstream lip 121a.

Thus, the space 123a is alternately at low pressure and open towards the suction inlet 41 to suck in fluid (gas or liquid) and at overpressure and open towards the discharge outlet 42 to expel this fluid there. These lips confer a self-priming ability at the pump.

We will now describe in detail the case where these upstream and downstream lips are circular lips as illustrated in the various embodiments of FIGS. 7, 10, 11 and 12.

As stated earlier, the pump includes:

- A first upstream circular lip 120a placed closer to the suction inlet 41 than to the delivery outlet 42; and

- A first downstream circular lip 121a placed closer to the delivery outlet 42 than to the suction inlet 41.

These first upstream and downstream circular lips 120a, 121a are placed between one of the sides of said movable part 45 and a first wall of the chamber 44 to define a first space 123a between these first upstream and downstream circular lips 120a, 121a.

In the present case, as the mobile part forms a disc hollowed out at its center, this first space 123a defined between the lips 120a and 121a forms an annular space extending between a first wall 44a of the chamber 44 and a first side of the chamber. mobile part 45 which is opposite this first wall 44a.

As can be understood in particular from FIG. 11, these first upstream and downstream circular lips 120a, 121a are such that, on a first part PI of said reciprocating movement of said movable part 45 relative to the chamber 44, the first downstream circular lip 121a provides a seal preventing the passage of fluid from said delivery outlet 42 to said first space 123a and the first upstream circular lip 120a then allowing free fluid passage between said first space 123a and said suction inlet 41.

In this case, on this first part PI of said reciprocating movement of said movable part 45, the first upstream circular lip 120a is moved away from one of said first wall 44a or movable part 45 to generate a free fluid passage, that is to say a free space between said first space 123a and said suction inlet 41.

Thus, on this first part PI of said reciprocating movement, as the first space 123a is closed downstream and open upstream, a fluid suction effect is obtained from the suction inlet 41 towards the first space 123a by separating the movable part 45 vis-à-vis the first wall 44a.

As can be seen in particular from FIG. 11, these first upstream and downstream circular lips 120a, 121a are such that on a second part P2 of said reciprocating movement of said movable part 45 relative to the chamber 44, the first upstream circular lip 120a produces a seal preventing the passage of fluid from said first space 123a to said suction inlet 41, the first downstream circular lip 121a being arranged for:

- On the one hand, allow the passage of fluid between said first space 123a and said delivery outlet 42 when a fluid pressure inside said first space 123a is greater than a fluid pressure at the delivery outlet 42; and for

on the other hand, preventing the passage of fluid from said delivery outlet 42 to said first space 123a.

Thus, on this second part P2 of said reciprocating movement, as the first space 123a is closed upstream and open downstream only when the fluid pressure in the first space 123a is greater than a fluid pressure at the level of the discharge outlet 42, a discharge of fluid from the first space 123a towards the discharge outlet 42 is obtained by bringing the movable part 45 closer to the first wall 44a.

The reciprocating movement of the movable part 45 induces a suction of fluid from the suction inlet 41 towards the first space 123a on the first part PI of the movement then an expulsion of fluid from the first space 123a towards the delivery outlet 42 on the second part P2 of said reciprocating displacement.

To double this effect of suction / expulsion of fluid / liquid, it is possible to arrange for the pump to include a second upstream lip 120b and a second downstream lip 121b provided to deform according to the movement of the movable part 45 so as to create between these lips 120b, 121b and a second wall 44b of the chamber 44, a second space 123b expandable when the moving part 45 is moved away from the second wall 44a of the chamber and compressible when one brings the moving part 45 closer to the second wall 44a.

In this case, the part 45 is movable between the first and second walls 44a, 44b of the chamber 44.

The part 45 is thus alternately moved away from and closer to the second wall 44b during the actuation of the electric motor 46 by the control unit UC.

The second upstream lip 120b is adapted to create a sealed contact against the second wall 44b when the fluid pressure in the second space 123b exceeds a fluid pressure upstream of this second upstream lip 120b.

Conversely, the second downstream lip 121b is suitable for:

- On the one hand, create a sealed contact against the second wall 44a as long as the fluid pressure in the second space 123b is less than a fluid pressure downstream of this second downstream lip 121b; and to

- On the other hand, move away from the second wall 44b when the fluid pressure in the space 123b is greater than the fluid pressure downstream of this downstream lip 121b.

Thus, the second space 123b is alternately in depression and open towards the suction inlet 41 to suck fluid there (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid therein.

The second upstream circular lip 120b is placed closer to the suction inlet 41 than to the delivery outlet 42 and the second downstream circular lip 121b is placed closer to the delivery outlet 42 than to the suction inlet 41.

These second upstream and downstream circular lips 120b, 121b are placed between one of the sides of said movable part 45 and a second wall 44b of the chamber 44 to define a second space 123b between these second upstream and downstream circular lips 120b, 121b.

In the present case, as the moving part forms a disc hollowed out at its center, this second space 123b defined between the lips 120b and 121b forms an annular space extending between the second wall 44b and the second side of the moving part 45 which is opposite this second wall 44b.

As can be seen in particular from FIG. 11, these second upstream and downstream circular lips 120b, 121b are such that, on a third part of said reciprocating displacement of said movable part 45 relative to the chamber 44, the second downstream circular lip 121b produces a seal preventing the passage of fluid from said discharge outlet 42 to said second space 123b and the second upstream circular lip 120b then allowing free fluid passage between said second space 123b and said suction inlet 41.

It should be noted that this third part of the movement of the movable part which is symmetrical with the first part PI of the movement relative to a central position of the part 45 between the walls 44a and 44b.

In this case, on this third part of said reciprocating movement of said movable part 45, the second upstream circular lip 120b is remote from one of said second wall 44b or movable part 45 to generate a free fluid passage, that is, that is to say a free space between said second space 123b and said suction inlet 41.

Thus, on this third part of said reciprocating movement, as the second space 123b is closed downstream and open upstream, a fluid suction effect is obtained from the suction inlet 41 towards the second space 123b by separating the movable part 45 vis-à-vis the second wall 44b.

As can be seen in particular from FIG. 11, these second upstream and downstream circular lips 120b, 121b are such that over a fourth part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second upstream circular lip 120b produces a sealing preventing the passage of fluid from said second space 123b to said suction inlet 41, the second downstream circular lip 121b being arranged for:

- On the one hand allow the passage of fluid between said second space 123b and said discharge outlet 42 when a fluid pressure inside said second space 123b is greater than a fluid pressure at the discharge outlet 42; and on the other hand to prevent the passage of fluid from said delivery outlet 42 to said second space 123b.

Thus, on this fourth part of said reciprocating displacement, as the second space 123b is closed upstream and open downstream only when the fluid pressure in the second space 123b is greater than a fluid pressure at the outlet discharge 42, a discharge of fluid from the second space 123b to the discharge outlet 42 is obtained by bringing the movable part 45 closer to the second wall 44b.

The reciprocating movement of the movable part 45 induces a suction of fluid from the suction inlet 41 towards the second space 123a then an expulsion of fluid from the second space 123b towards the delivery outlet 42.

Thus, thanks to the pairs of lips placed on either side of the part, there is an alternation of displacement, two aspirations and two expulsions offset from each other which makes it possible to obtain a more homogeneous flow of fluid over time. .

It should be noted that the number of lips on each side can be variable.

Thus, if one face of the moving part does not have a lip then, it is either because this face is not used for pumping (case of a moving part in the form of a disc not hollowed out in its center), or because it is the movable part which is deformable to establish a seal against the corresponding wall of the chamber.

The use of a single lip on one side of the moving part only makes it possible to oppose a return of fluid.

The use of two lips on the same side of the moving part makes it possible to create the space between an upstream lip and a downstream lip to obtain a dry self-priming effect for the pump.

With more than two lips on the same side of the moving part, it is possible to increase the differential pressure generated between the discharge outlet and the suction inlet of the pump.

Thus, depending on the desired differential pressure, there could be three lips per side of the moving part or more.

It has been noticed that under certain conditions, a given lip can come to be pressed and make a suction cup against a support of this lip (the chamber wall or the moving part).

The behavior of the pump is then degraded because this given lip no longer performs its sealing function.

To avoid this, as shown in the figures

7, 11 and 12, have made sure to create at least one fluid passage between the given lip and its support.

Each at least one passage of fluid between a given lip and its support is such that when this lip comes to bear against its support, fluid can continue to circulate between this lip and its support. This avoids the suction effect.

For this, we can either create shape irregularities between the given lip and its support such as:

bosses carried by the given lip and oriented towards its support; and or

- Bosses carried by the support and oriented towards the given lip that it supports; and or

- canals (hollow areas) carried by the lip data and oriented towards its support; and / or channels (hollow areas) carried by the support and oriented towards the given lip that it supports.

Preferably, each boss or channel extends longitudinally from one end of the given lip towards a junction point between this lip and its support.

It is generally preferred that the bosses and / or channels are only formed / carried on the support of the lip rather than on the lip itself because this lip is then deformable in a homogeneous manner.

Having a boss or a channel carried by a lip induces preferred deformation zones on the lip which can induce pressure drops that are detrimental to the operation of the pump.

In the case where the given lip is annular, it is preferred that these bosses or channels be formed on the support of the lip in order to form therein spokes centered around an axis of symmetry of the given lip.

The pump 4 can be used alone to transfer fluid from its suction inlet to the delivery outlet or alternatively it can be used in combination with the device according to the invention to form a cellar vacuum.

The fluidic connection between the pump 4 and the device 1 is preferably made by means of a coupling that can be actuated manually, that is to say capable of switching manually, without tools, from a state of coupling of the device with the pump in a state of decoupling of the device from the pump and vice versa.

This coupling may include a quick coupling and / or a coupling with an idle nut allowing tightening by screwing to tighten the pipe to the pump without the need for relative pivoting of the device 1 with respect to the pump 4. Preferably, it is ensured that this connection comprises an O-ring providing a seal as soon as there is a fitting of the pipe vis-à-vis the fitting over a fitting depth greater than at least one thread pitch of the 'crazy nut.

Thus, manually, without requiring any tool, it is possible to quickly switch from the empty cellar configuration to the liquid transfer configuration and vice versa.

The cellar vacuum configuration 100 is particularly practical because the device 1 makes it possible to reduce the minimum liquid level from which it can start to pump liquid lying on the ground.

This is particularly advantageous for limiting the effects of a flood since the suction of liquid begins at the earliest. Likewise, the device 1 makes it possible to suck up liquid lying on the ground until a very low height of liquid on the ground is reached, preferably less than 4 mm, preferably less than 2 mm.

According to a first method of assembly between the device 1 and the pump 4, the pump 4 comprises feet 43 whose ends are coplanar with the bearing face of the device 1 when the first end 3a of the pipe 3 of the device is connected. fluidly at said suction inlet 41.

In this first assembly mode, when the pump and the device according to the invention are fluidly connected to one another and positioned to pump liquid on a plane ground S, the pump 4 and the device 1 are then placed. next to each other on this floor.

In this embodiment, the assembly 100 according to the invention is particularly stable since its center of gravity is very close to the ground S. In this mode, the suction inlet 41 and the delivery outlet 42 of the pump 4 extend longitudinally in a common plane which is parallel to said bearing face of the device.

In a second method of assembling the pump 4 with the device 1 (see Figures 9 and 10), the pump 4 is assembled with the first end 3a of the pipe 3 of the device 1 in such a way that when the face of support of the device is positioned on a plane floor S to suck liquid therein, the pump 4 is then supported by this device 1.

In this embodiment, illustrated in Figures 9 and 10, the first end 3a of the pipe 3 is formed on an upper face of the device 1, the bearing face of the device and this upper face being placed on either side. other of device 1.

In this embodiment, the suction inlet 41 of the pump 4 extends longitudinally in an extension direction which is perpendicular to an axis of longitudinal extension of the delivery outlet 42.

Here the suction inlet 41 extends longitudinally in an extension direction which is perpendicular to said bearing face of the device 1 on the ground.

In a preferred embodiment of the assembly 100 illustrated in Figures 8, 9, 10, the device 1 forms a support foot for the pump 4 on the ground.

According to another advantageous embodiment of the assembly 100 illustrated in Figures 8 to 10, the assembly is adapted to selectively adopt a liquid transfer configuration (Figure 8) and a cellar vacuum configuration (Figures 9 and 10).

In liquid transfer configuration (Figure 8), the device 1 is assembled on a fastener 47 of the pump 4 located at a distance from the suction inlet 41 of the pump. In this way, liquid can be transferred using the pump without this liquid passing through the device.

In the empty cellar configuration (Figures 9 and 10), the device 1 is fluidly connected to the suction inlet 41 of the pump, this device 1 forming a support foot for the pump, this device 1 then being arranged for filter the fluid sucked by the pump.

It should be noted that the attachment 47 is here a protuberance (here a threaded protuberance) on which the first end 3a of the pipe is fitted.

3 of operative part 1.

Claims

1. Device (1) for the suction of liquid on a floor (S), the device (1) comprising an outer wall (10) defining a first enclosure (El) open at least via recesses (11) formed through of this outer wall (10) to allow the passage of liquid from the outside of the first enclosure (El) to the inside of this first enclosure (El), the device (1) comprising a pipe (3) having a first end (3a) arranged to be fluidly connected with a liquid suction pump (4) and a second end (3b) of the pipe (3) fluidly connected to said first enclosure (El) in order to be able to suck liquid located in this first enclosure (El) towards said pipe (3), characterized in that the device (1) comprises an inner wall (20) defining a second enclosure (E2), this second enclosure (E2) being open at least via recesses (21) formed through the inner wall (20) to allow the passage of liquid from the first enclosure (El) to the second enclosure (E2) and said second end (3b) of the pipe opening inside this second enclosure (E2), at a distance from the first enclosure (El) .

2. Device (1) according to claim 1, wherein said a second enclosure (E2) is placed inside said first enclosure (El).

3. Device (1) according to any one of claims 1 or 2, wherein:

the recesses (21) formed through the inner wall (20) are exclusively formed between a suction limit plane through the inner wall (Pla) and a bearing plane of the inner wall (Pib); and the recesses (11) formed through the outer wall (10) are exclusively formed between a limit suction plane through the outer wall (P2a) and a bearing plane of the outer wall (P2b), some at less of the recesses formed through the outer wall being formed between the suction limit plane through the outer wall (P2a) and the suction limit plane through the inner wall (Pla).

4. Device according to any one of claims 1 to 3, wherein at least some of the recesses (11) formed through the outer wall (10) extend between the suction limit plane through the inner wall. (Pla) and the support plane of the interior wall (Pib).

5. Device according to any one of claims 3 or 4, wherein the bearing plane of the inner wall (Pib) and the bearing plane of the outer wall (P2b) are coplanar with each other.

6. Device according to any one of claims 3 to 5, wherein said:

- suction limit plane through the interior wall (Pla);

- bearing plane of the interior wall (Pib); - suction limit plane through the outer wall (P2a); and

- bearing plane of the outer wall (P2b); are planes parallel to each other.

7. Device according to any one of claims 1 to 6, comprising a bottom (22) resting against the inner wall (20), this bottom (22) forming a lower face of the second enclosure (E2).

8. Device according to claim 7, wherein the bottom (22) comprises a lower plate (22a) forming the lower face of the second enclosure (E2) and ribs (22b), each of these ribs (22b) extending perpendicular to said bottom plate (22a), each of these ribs having a first end end disposed opposite the inner wall (20) and a second terminal end disposed in a central zone of the second enclosure (E2) towards which the second end (3b) of the pipe (3) opens.

9. Device according to any one of claims 7 or 8, wherein the second enclosure

(E2) is open towards a bottom plane (PF) in which extends a major part of said bottom 22.

10. Device according to any one of claims 7 or 8, comprising a rod (40) extending inside the second enclosure (E2), this rod (40) extending from an upper face of this second. enclosure (E2) up to a central zone of said bottom (22), the rod (40) and the bottom (22) being assembled mechanically against each other.

11. Device according to any one of claims 1 to 10, wherein all the recesses formed through the inner wall (20) extend lengthwise in the same plane which is common to all the recesses (21). of the inner wall (20).

12. An assembly (100) for the suction of liquid on a floor (S) comprising the device (1) according to any one of claims 1 to 11 and a suction pump (4) for liquid connected to said first end. (3b) of the pipe (3), the pump (4) being connected to a control unit (UC) of the pump (4) itself connected to a probe (50) suitable for detecting the attainment of a liquid level with respect to the pump (4), this control unit being arranged to control the operation of the pump (4) in response to the detection of said liquid level by the probe (50).

13. The assembly (100) of claim 12, wherein the pump (4) comprises a suction inlet (41) and a discharge outlet (42), the first end (3a) of the pipe (3) of the device. (1) being arranged to be fluidly and removably connected to said suction inlet (41) such that when this pipe (3) is connected to the suction inlet (41) of the pump (4) and that a bearing face of the device (1) is placed on a level ground (S), the pump (4) under the effect of its own weight opposes the removal of the device (1) vis- vis-à-vis said flat ground (S).

14. The assembly (100) of claim 13, wherein the pump (4) comprises feet (43) whose ends are coplanar with the bearing face of the device (1) when the first end (3a) of the pipe. (3) of the device is fluidly connected to said suction inlet (41).

15. The assembly of claim 13, wherein the pump (4) is assembled with the first end (3a) of the pipe (3) of the device (1) such that when the bearing face of the device is positioned on a flat floor (S) for sucking liquid therein, the pump (4) is then supported by this device (1).

16. An assembly according to any one of claims 13 to 15, wherein the pump (4) is a dry self-priming pump.

17. An assembly according to any one of claims 13 to 16, wherein the pump comprises a chamber (44) fluidly connected to the suction inlet (41) and to the discharge outlet (42), a movable part ( 45) disposed in the chamber (44) and an electric motor (46) located outside the chamber (44), the electric motor (46) being connected to the workpiece movable (45) by a coupling mechanism such that actuation of the electric motor (46) induces reciprocating movement of the movable part (45) relative to the chamber to displace fluid from the suction inlet towards the discharge outlet.

18. The assembly of claim 17, wherein the pump comprises a first upstream circular lip (120a) placed closer to the suction inlet (41) than to the discharge outlet (42) and a first circular lip. downstream (121a) placed closer to the delivery outlet (42) than to the suction inlet (41), these first upstream and downstream circular lips (120a, 121a) being placed between one of the sides of said part movable (45) and a first wall (44a) of the chamber (44) in order to define a first space (123a) between these first upstream and downstream circular lips (120a, 121a), these first upstream and downstream circular lips (120a, 121a ) being such that:

- on a first part (PI) of said reciprocating displacement of said movable part (45) relative to the chamber (44), the first downstream circular lip (121a) provides a seal preventing the passage of fluid from said delivery outlet (42) ) towards said first space (123a), the first upstream circular lip (120a) then allowing a free fluid passage between said first space (123a) and said suction inlet (41); and

- on a second part (P2) of said reciprocating displacement of said movable part (45) relative to the chamber (44), the first upstream circular lip (120a) provides a seal preventing the passage of fluid from said first space (123a) towards said suction inlet (41), the first downstream circular lip (121a) being arranged for: - on the one hand allow the passage of fluid between said first space (123a) and said delivery outlet (42) when a fluid pressure inside said first space (123a) is greater than a fluid pressure in level of the discharge outlet (42); and for

19. An assembly (100) according to any one of claims 13 to 18, wherein the device (1) for sucking liquid from a floor (S) forms a support foot for the pump (4).

20. An assembly (100) according to any one of claims 13 to 18, wherein the assembly is adapted to selectively adopt a liquid transfer configuration and a vacuum-cellar configuration, in the liquid transfer configuration, the device. (1) is assembled on an attachment (47) of the pump (4) located at a distance from the suction inlet (41) of the pump and in the vacuum-cellar configuration, the device (1) is fluidly connected to the suction inlet (41) of the pump, this device (1) forming a support foot for the pump, this device (1) then being arranged to filter the fluid sucked by the pump.