EP3969757B1 - Device for sucking up liquid from the ground - Google Patents

Description

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

BACKGROUND OF THE INVENTION

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

This filtration aims to limit the risk of the pump being blocked by objects/particles located in the environment of the device for suction of liquid.

We know a device with filtration with two walls of GB809277 . The device is designed to float in water. A pipe runs through the device.

Such a device plays the role of 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 adapted to be fluidly connected to a pump for suction of liquid from a floor, this device limiting the risk of clogging of the pump.

SUMMARY OF THE INVENTION

The invention is defined by the claims. For this purpose, according to the invention, a device is proposed for suction of liquid on 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 outside of the first enclosure towards the inside of this first enclosure.

The device according to the invention comprises a pipe having a first end arranged to be fluidly connected to a liquid suction pump and a second end of the pipe fluidly connected to said first enclosure to be able to suck 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 then through the second enclosure.

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

We thus have double filtration and a buffer zone between the interior wall and the exterior wall which greatly limits the risk of the suction pump being blocked by materials present outside the suction device.

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

BRIEF DESCRIPTION OF THE DRAWINGS

• [Fig. 1] la figure 1 est une vue en perspective d'un premier mode de réalisation d'un ensemble comportant un dispositif pour l'aspiration de liquide sur un sol selon l'invention et une pompe d'aspiration de liquide qui est reliée latéralement à une première extrémité de la conduite du dispositif, dans ce mode de réalisation l'ensemble forme un vide cave dont la pompe et le dispositif sont posés côte à côte sur le sol où l'on veut aspirer le liquide ;
• [Fig. 2] la figure 2 est une vue en perspective de la pompe de la figure 1 utilisée en pompe de transfert, dans ce mode de réalisation l'entrée d'aspiration de la pompe est reliée à une conduite externe d'admission de liquide vers la pompe et la sortie de refoulement de la pompe est reliée à une conduite externe de refoulement du liquide ;
• [Fig. 3] la figure 3 est une vue en perspective d'une face inférieure d'une partie du dispositif pour l'aspiration de liquide sur un sol illustré à la figure 1 (sans son fond), une zone de cette figure 3 est un agrandissement au niveau des évidements en fentes réalisées au travers des parois intérieure et extérieure du dispositif ;
• [Fig. 4a] la figure 4a est une vue en coupe transversale d'une partie du dispositif pour l'aspiration de liquide sur un sol illustré à la figure 1 (sans son fond), une zone de cette figure 4a est un agrandissement au niveau des évidements en fentes réalisées au travers des parois intérieure et extérieure du dispositif (le niveau de liquide Nx à l'extérieur de la première enceinte E1 passe au-dessus du plan limite d'aspiration P1a au travers de la paroi intérieure 20, à ce stade, il n'y a pas encore d'aspiration de liquide vers la pompe car la pompe ne peut aspirer que les gaz au-dessus du niveau Nx) ;
• [Fig. 4b] la figure 4b est une vue identique à celle de la figure 4a mais ici le niveau de liquide Nx à l'extérieur de la première enceinte E1 passe au-dessus du plan limite d'aspiration P1a au travers de la paroi intérieure 20, à ce stade, le niveau de liquide Ny dans la seconde enceinte E2 commence à monter sous l'effet d'une aspiration de gaz par la pompe auto-amorçante à sec, le liquide n'arrive pas encore au niveau de la pompe ;
• [Fig. 4c] la figure 4c est une vue identique à celle des figures 4a et 4b mais ici le niveau de liquide Nx à l'extérieur de la première enceinte E1 passe légèrement au-dessus du plan limite d'aspiration P1a au travers de la paroi intérieure 20, à ce stade, le niveau de liquide Ny dans la seconde enceinte E2 est monté sous l'effet d'une aspiration de gaz par la pompe et ce liquide remplie complètement la seconde enceinte E2 et arrive au niveau de la pompe ;
• [Fig. 5] la figure 5 est une vue en coupe transversale du dispositif pour l'aspiration de liquide sur un sol illustré à la figure 1 (avec son fond) ;
• [Fig. 6] la figure 6 est une vue en coupe transversale du dispositif pour l'aspiration de liquide sur un sol illustré à la figure 1 (avec son fond), une zone de cette figure 6 est un agrandissement au niveau des évidements en fentes 11, 21 réalisés au travers des parois intérieure et extérieure du dispositif (on voit que la section transversale de chacune de ces évidements va en augmentant dans un sens d'écoulement du fluide au travers de ces évidement de manière à limiter le risque de colmatage interne de chacun de ces évidements) ;
• [Fig. 7] la figure 7 est une vue en coupe transversale de l'ensemble illustré à la figure 2 où l'on voit que la pompe comporte un moteur électrique entrainant un déplacement alternatif d'une pièce mobile 45 entre des première et deuxième parois 44a, 44b de la chambre 44 pour générer une aspiration de fluide par la pompe ; Une zone de cette figure 7 est un agrandissement au niveau de cette pièce mobile 45 où l'on voit des premières lèvres circulaires amont et aval 120a, 121a d'un premier côté de la pièce 45 et des deuxièmes lèvres circulaires amont et aval 120b, 121b d'un autre côté de la pièce 45 ;
• [Fig. 8] la figure 8 est une vue en perspective d'un second mode de réalisation d'un ensemble comportant un dispositif pour l'aspiration de liquide sur un sol selon l'invention et une pompe d'aspiration de liquide, l'ensemble étant dans sa configuration de transfert de liquide, dans laquelle le dispositif selon l'invention est assemblé sur une attache de la pompe à distance de l'entrée d'aspiration de la pompe, ce dispositif selon l'invention formant un pied de support de la pompe et la pompe étant utilisée pour transférer du fluide sans que ce fluide / liquide ne transite par le dispositif selon l'invention ;
• [Fig. 9] la figure 9 est une vue en perspective du second mode de réalisation de l'ensemble comportant le dispositif pour l'aspiration de liquide sur un sol selon l'invention, l'ensemble étant dans sa configuration vide cave dans laquelle le dispositif selon l'invention est relié fluidiquement à l'entrée d'aspiration de la pompe, ce dispositif selon l'invention formant un pied de support de la pompe et la pompe étant utilisée pour aspirer du liquide sur le sol, ce liquide transitant par le dispositif selon l'invention ;
• [Fig. 10] la figure 10 est une vue en coupe selon un plan X-X de l'ensemble de la figure 9 (l'ensemble est ici dans le mode de réalisation où le dispositif forme un pied de support de la pompe), l'ensemble est ici dans sa configuration vide-cave ;
• [Fig. 11] la figure 11 est une vue en coupe de la pièce mobile 45 dans la chambre 44, les premières lèvres 120a, 121a étant ici attachées d'un premier côté de la pièce mobile 45 pour venir en appui contre une première paroi 44a de la chambre 44 et les deuxièmes lèvres 120b, 121b étant attachées d'un second côté de la pièce mobile 45 pour venir en appui contre une seconde paroi 44b de la chambre 44 ;
• [Fig. 12] la figure 12 est une vue en coupe de la seconde paroi 44b de la chambre 44 de la pompe, dans ce mode de réalisation, les deuxièmes lèvres 120b, 121b ne sont pas attachées à la pièce mobile 45 comme sur la figure 11, mais elles sont exclusivement attachées à la deuxième paroi 44b de la chambre 44 (ce mode est conforme à celui présenté à la figure 7 où la deuxième paroi 44b porte les deuxièmes lèvres 120b, 121b et où la première paroi 44a porte les premières lèvres 120a, 121a).

Other characteristics and advantages of the invention will emerge clearly from the description given below, for information only and in no way limiting, with reference to the appended drawings, in which:

• [ Fig. 1 ] there figure 1 is a perspective view of a first embodiment of an assembly comprising a device for 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 driving the device, in this embodiment the assembly forms a cellar vacuum whose pump and the device are placed side by side on the ground where the liquid is to be sucked up;
• [ Fig. 2 ] there figure 2 is a perspective view of the pump of the figure 1 used as a transfer pump, in this embodiment the suction inlet of the pump is connected to an external liquid intake pipe to the pump and the discharge outlet of the pump is connected to an external discharge pipe some cash ;
• [ Fig. 3 ] there Figure 3 is a perspective view of a lower face of a part of the device for suction of liquid on a floor illustrated in figure 1 (without its background), an area of this Figure 3 is an enlargement at the level of the slot recesses made through the interior and exterior walls of the device;
• [ Fig. 4a ] there figure 4a is a cross-sectional view of part of the device for suction of liquid on a floor illustrated in figure 1 (without its background), an area of this figure 4a is an enlargement at the level of the slot recesses made through the interior and exterior walls of the device (the liquid level Nx outside the first enclosure E1 passes above the suction limit plane P1a through the interior wall 20, at this stage, there is no liquid suction towards the pump yet because the pump can only suck gases above the level Nx);
• [ Fig. 4b ] there figure 4b is a view identical to that of the figure 4a but here the liquid level Nx outside the first enclosure E1 passes above the suction limit plane P1a through the interior wall 20, at this stage, the liquid level Ny in the second enclosure E2 begins to be mounted under the effect of gas suction by the dry self-priming pump, the liquid does not yet reach the level of the pump;
• [ Fig. 4c ] there figure 4c is a view identical to that of figures 4a And 4b but here the liquid level Nx outside the first enclosure E1 passes slightly above the suction limit plane P1a through the interior wall 20, at this stage, the liquid level Ny in the second enclosure E2 is mounted under the effect of gas suction by the pump and this liquid completely fills the second enclosure E2 and arrives at the level of the pump;
• [ Fig. 5 ] there Figure 5 is a cross-sectional view of the device for suction of liquid on a floor illustrated in figure 1 (with its background);
• [ Fig. 6 ] there Figure 6 is a cross-sectional view of the device for suction of liquid on a floor illustrated in figure 1 (with its background), an area of this Figure 6 is an enlargement at the level of the slotted recesses 11, 21 made through the interior and exterior walls of the device (we see 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 ] there figure 7 is a cross-sectional view of the assembly illustrated in figure 2 where we see 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; An area of this figure 7 is an enlargement at the level of this moving part 45 where we see first upstream and downstream circular lips 120a, 121a on a first side of the part 45 and second upstream and downstream circular lips 120b, 121b on another side from room 45;
• [ Fig. 8 ] there figure 8 is a perspective view of a second embodiment of an assembly comprising a device for suction of liquid on a floor according to the invention and a liquid suction pump, the assembly being in its transfer configuration of liquid, 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 and the pump being used to transfer fluid without this fluid/liquid passing through the device according to the invention;
• [ Fig. 9 ] there Figure 9 is a perspective view of the second embodiment of the assembly comprising the device for suction of liquid on a floor according to the invention, the assembly being in its cellar vacuum configuration in which the device according to the invention is fluidly connected to the suction inlet of the pump, this device according to the the invention forming a support foot for the pump and the pump being used to suck up liquid from the ground, this liquid passing through the device according to the invention;
• [ Fig. 10 ] there Figure 10 is a sectional view according to a plan XX of the entire Figure 9 (the assembly is here in the embodiment where the device forms a support leg for the pump), the assembly is here in its cellar empty configuration;
• [ Fig. 11 ] there Figure 11 is a sectional view of the moving part 45 in the chamber 44, the first lips 120a, 121a being here attached to a first side of the moving 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 come to bear against a second wall 44b of the chamber 44;
• [ Fig. 12 ] there 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 moving part 45 as in the Figure 11 , but they are exclusively attached to the second wall 44b of the chamber 44 (this mode conforms to that presented in figure 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 suction of liquid on a floor S.

This device 1 comprises an outer wall 10 defining a first enclosure E1 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 E1 to the inside of this first speaker E1.

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 slots. Each recess 11 extends in a plane perpendicular to a support 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 exterior 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 slots parallel to each other.

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

The recesses of the first group G1 all open towards the ground to suck up liquid as closely as possible. from the ground and the recesses 11 of the second group G2 are moved away from the ground to be able to suck up liquid located above the device.

These recesses 11 are distributed over most 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 to be able to achieve a uniform suction of liquid towards the inside of the first enclosure E1. The risk of clogging 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 to be able to suck up liquid located in this first enclosure E1 towards 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 E1. 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 E1 towards the second enclosure E2 and said second end 3b of the pipe opening inside the this second enclosure E2, at a distance from the first enclosure E1.

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

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

This makes it possible to limit the risk of clogging of the exterior wall because the depression between the internal and external faces of the exterior wall 10 is limited in relation to the depression which exists between the interior and exterior faces of the interior wall 20.

This limits the risk of objects being sucked in around the exterior wall 10.

Preferably, as we understand from the figure 4a , the minimum dimension X1 of the recesses 11 through the outer wall 10 is less than the minimum dimension 10, we are certain that these particles will be able to pass through the recesses 21 of the interior wall 20, which avoids the risk of clogging the first enclosure E1. Furthermore, the minimum dimension X2 of the 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 capable of passing into the second enclosure E2.

The recesses 21 formed through the interior wall 20 are exclusively formed between a suction limit plane through the interior wall P1a (that is to say an upper plane) and a support plane of the interior wall P1b (that is to say a lower plane compared to said upper plane when the device is placed on the ground to suck up liquid).

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

At least some of the recesses formed through the exterior wall 10 are formed between the suction limit plane through the exterior wall P2a and the suction limit plane through the interior wall P1a.

As the outer wall 10 has recesses 11 which are above the level of the suction limit plane P1a 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 suction limit plane P1a of the inner wall.

This reduces the risk of clogging the recesses formed through the exterior wall.

Furthermore, thanks to this characteristic, when the device is arranged so that the support plane of the interior wall P1b is below the suction limit plane P1a through the interior wall 20 and the liquid level Nx outside the first enclosure passes above the suction limit plane P1a, we are then certain that the recesses 21 formed through the interior wall are all immersed in the liquid and that they do not open to the 'outdoors.

It is then sufficient to apply a vacuum in line 3 to generate a depression in the second enclosure E2 and thus force the suction of liquid while avoiding the passage of air/gas towards this second enclosure E2.

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

As seen on the 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 suction limit plane through the interior wall P1a and the suction limit plane through the exterior wall P2b. This characteristic allows the second end 3b of the pipe to quickly generate a depression in the second enclosure to raise the liquid level Ny above the suction limit plane P1a, and quickly suck up the liquid located 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 interior wall 20. This characteristic promotes homogenization of the flow of liquid flowing through the different recesses 21, which limits the risk of the appearance of a low liquid level 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 induce degradation pump operation).

As seen on the figures 1 , 4a , 4b, 4c And 7 , at least some of the recesses 11 formed through the exterior wall 10 extend between the suction limit plane through the interior wall P1a and the support plane of the interior wall P1b.

Thus, as soon as the liquid begins to spread on the ground S, it can quickly reach the interior of the second enclosure E2. We can thus start pumping the liquid at the earliest, in this case, as soon as the water level Ny inside the second enclosure E2 passes above the suction limit plane through the interior wall P1a.

More generally, the recesses 11 formed through the exterior wall 10 are exclusively formed between the suction limit plane through the exterior wall P2a and the support plane of the exterior wall P2b.

It should be noted that the support plane of the interior wall P1b and the support plane of the exterior wall P2b are preferentially coplanar with each other to improve the hold of the device on the ground S.

• plan limite d'aspiration au travers de la paroi intérieure P1a ;
• plan d'appui de la paroi intérieure P1b ;
• plan limite d'aspiration au travers de la paroi extérieure P2a ; et
• plan d'appui de la paroi extérieure P2b ;

sont des plans préférentiellement parallèles entre eux et sont prévus pour être horizontaux lorsque le dispositif est disposé sur un sol plan horizontal pour y aspirer du liquide.Likewise, the said:

• suction limit plane through the interior wall P1a;
• support plane of the interior wall P1b;
• suction limit plane through the exterior wall P2a; And
• support plane of the exterior wall P2b;

are planes preferably parallel to each other and are intended to be horizontal when the device is placed on a horizontal plane ground to suck up liquid.

Preferably, the suction limit plane through the interior wall P1a is spaced from the support plane of the interior wall P1b 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 interior wall 20. Consequently, the distance between the ground (against which the interior wall 20 bears) and the limit plane of suction P1a is thus very weak.

As soon as the liquid level, here water, on the ground S exceeds the suction limit plane P1a through the interior 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 up 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.

We can thus reduce the residual level of liquid on the ground at the end of suction.

As we understand in particular from figures 5 , 6 , 7 , the device preferably comprises a bottom 22 resting against the interior wall 20.

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

This bottom 22 is preferably solid but it may possibly have recesses of dimensions less than or equal to the minimum dimensions X2 of each of the recesses 21 of the interior 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 for 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 perpendicular to said lower plate 22a.

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

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 interior wall 20 where the liquid is admitted towards a central zone of the second enclosure E2 where pipe 3 opens.

This promotes a laminar flow of the liquid towards line 3, which limits the pressure loss induced by the device according to the invention.

As we understand 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 lower plate 22a of the bottom 22 extends.

The fact that the first enclosure E1 is open towards the bottom plane PF makes it possible to have an opening in this first enclosure oriented towards the ground S on which it is desired to suck up the liquid. When liquid is suctioned via line 3, a depression is generated in the first enclosure E1 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 tends to press towards the ground S.

The risk of particles passing between the exterior wall 10 and the ground S on which the device is placed 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 mechanically assembled 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 bending of the bottom 22 and consequently the risk of its breakage.

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 has a peripheral edge having a chamfer 22c extending to the upper face of the bottom.

Some of the recesses 21 formed through the interior wall 20 also have a chamfer 21a, one 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 by deviating from this chamfer 22c going from the outside towards the inside of the second enclosure E2.

As the chamfer 22c at 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 lower face of the bottom which allows this chamfer to approach as close as possible to the ground S on which the device 1 is placed.

This makes it possible to suck up the liquid located on the ground S at the level of the junction between this chamfer 22c and the underside of the bottom 22.

This can be advantageous in lowering the liquid level from which pumping can begin.

Preferably, all the recesses 21 formed through the interior wall 20 extend in length in the same plane which is common to all of 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 liquid passage section through a given recess 21 made through the interior wall 20 is determined by its length and its width.

As the recesses 21 of the interior 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, we know that we can essentially suck up liquid without air.

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 allows only liquid to be sucked up.

• le dispositif 1 selon l'un quelconque des modes de réalisation décrits ; et
• une pompe d'aspiration (4) de liquide reliée à ladite première extrémité (3b) de la conduite (3).

As indicated previously, and illustrated in figures 1 , 7 , 8 , 9 And 10 , the invention also relates to an assembly 100 for suction of liquid on 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).

Pump 4 is connected to a control unit UC of pump 4 itself connected to a probe 50 adapted to detect the reaching of a liquid level relative to 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 on the figures 1 and 2 , the probe 50 can be fixed on the pump or alternatively it can be fixed on 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 certain embodiments, in order to preserve the integrity of the probe 50, the probe 50 can be fixed on 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 liquid level detected by the probe 50 can be a liquid level Nx outside the first enclosure E1 or a liquid level in the first enclosure E1.

As illustrated on the figures 1 and 2 , the probe 50 may comprise at least two electrodes spaced from one another to be able to detect the reaching of a liquid level based on a measurement of at least one electrical characteristic carried out with these electrodes.

This electrical characteristic must be variable depending on 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 we can thus measure the reaching of the liquid level. The control unit UC can, based on this measurement, control the activation of the electric motor. This avoids operating the motor for liquid levels that are too low and incompatible with the self-priming of the pump, the pump being activated only when it can begin to suck up 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 interior wall P1a, that is to say preferably between 2 and 4 mm height of liquid relative to the ground S.

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

This keeps the pump running to lower the water level on the ground and avoid a level balance 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 from the detection of the drop in the liquid level below said predetermined level.

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

The duration of operation without water of the pump 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 from the probe a signal indicating the end of the countdown of the duration predetermined.

This pump 4 is dry self-priming, the term dry self-priming pump indicating the capacity of the pump to suck in dry air and create sufficient depression to suck up liquid from the ground and move it up to the chamber to discharge it via a discharge outlet 42 of the pump.

Pump 4 has a suction inlet 41 and a discharge outlet 42.

The first end 3a of the pipe 3 of the device 1 is arranged to be connected fluidically and removably to said suction inlet 41 in such a way that when this pipe 3 is connected to the suction inlet 41 of the pump 4 and that a support face of the device 1 is placed on a flat ground S (where it is desired to suck up liquid), the pump 4, under the effect of its own weight, opposes the movement away of the device 1 opposite said ground plane S.

The pump comprises a chamber 44 fluidly connected to the suction inlet 41 and to the discharge outlet 42, a moving part 45 arranged 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 an electrical power cable 60.

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

The moving part 45 here has the shape of a disc hollowed out in 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 in the disc in its center allows for a pumping effect on both sides of the moving part with a single discharge outlet facing this recess.

• soit un effet de pompage d'un seul des deux côtés de la pièce mobile (dans ce cas il n'y a besoin que d'une seule sortie de refoulement) ;
• soit un effet de pompage des deux côtes de la pièce mobile (dans ce cas, on doit prévoir une sortie de refoulement pour chaque côté de la pièce mobile).

It is however possible 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 on only one of the two sides of the moving part (in this case there is only 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 rigid here 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 ribbon) or in the form of a flexible tube extensible 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 can include an upstream lip 120a and a downstream lip 121a designed to deform depending on the movement of the moving part 45 so as to create between these lips 120a, 121a and the wall 44a of the chamber 44, a first space 123a which is expandable when moving part 45 is moved away from the first wall 44a of the chamber and compressible when moving part 45 is brought closer to the first wall 44a. The part 45 is alternately moved away from and brought 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.

• d'une part créer un contact étanche contre la première paroi 44a tant que la pression de fluide dans l'espace 123a est inférieure à une pression de fluide en aval de cette lèvre aval 121a ; et à
• d'autre part s'écarter de la première paroi 44a lorsque la pression de fluide dans l'espace 123a est supérieure à la pression de fluide en aval de cette lèvre aval 121a.

Conversely, the downstream lip 121a is suitable for:

• on the one hand create a tight 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 in depression and open towards the suction inlet 41 to suck in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid. These lips impart self-priming ability at the pump.

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

• une première lèvre circulaire amont 120a placée à plus grande proximité de l'entrée d'aspiration 41 que de la sortie de refoulement 42 ; et
• une première lèvre circulaire aval 121a placée à plus grande proximité de la sortie de refoulement 42 que de l'entrée d'aspiration 41.

As stated previously, the pump includes:

• a first circular upstream lip 120a placed closer to the suction inlet 41 than to the discharge outlet 42; And
• a first downstream circular lip 121a placed closer to the discharge 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 moving part forms a hollow disc in 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 movable part 45 which is opposite this first wall 44a.

As we understand in particular from the Figure 11 , these first upstream and downstream circular lips 120a, 121a are such that, on a first part P1 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 discharge outlet 42 towards said first space 123a and the first upstream circular lip 120a then authorizing a passage of free fluid between said first space 123a and said suction inlet 41.

In this case, on this first part P1 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 P1 of said reciprocating movement, as the first space 123a is closed towards the downstream and open towards the upstream, we obtain an effect of suction of fluid from the suction inlet 41 towards the first space 123a by moving the moving part 45 away from the first wall 44a.

• d'une part autoriser le passage de fluide entre ledit premier espace 123a et ladite sortie de refoulement 42 lorsqu'une pression de fluide à l'intérieure du ledit premier espace 123a est supérieure à une pression de fluide au niveau de la sortie de refoulement 42 ; et pour
• d'autre part interdire le passage de fluide ladite sortie de refoulement 42 vers ledit premier espace 123a.

As we understand in particular from the Figure 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 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 to:

• on the one hand authorize the passage of fluid between said first space 123a and said discharge outlet 42 when a fluid pressure inside said first space 123a is greater than a fluid pressure at the discharge outlet 42 ; and for
• on the other hand prohibit the passage of fluid from said discharge outlet 42 towards said first space 123a.

Thus, on this second part P2 of said reciprocating movement, as the first space 123a is closed towards the upstream and opened towards the 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 is obtained from the first space 123a towards the discharge outlet 42 by bringing the movable part 45 closer to the first wall 44a.

The reciprocating movement of the moving part 45 induces a suction of fluid from the suction inlet 41 towards the first space 123a on the first part P1 of the movement then an expulsion of fluid from the first space 123a towards the discharge outlet 42 on the second part P2 of said reciprocating movement.

To double this suction/expulsion effect of fluid/liquid, it is possible to ensure that the pump includes a second upstream lip 120b and a second downstream lip 121b designed to deform according to the movement of the moving part 45 so as to create between these lips 120b, 121b and a second wall 44b of the chamber 44, a second space 123b which is expandable when moving part 45 is moved away from the second wall 44a of the chamber and compressible when 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 brought closer to the second wall 44b during 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.

• d'une part créer un contact étanche contre la seconde paroi 44a tant que la pression de fluide dans le second espace 123b est inférieure à une pression de fluide en aval de cette seconde lèvre aval 121b ; et à
• d'autre part s'écarter de la seconde paroi 44b lorsque la pression de fluide dans l'espace 123b est supérieure à la pression de fluide en aval de cette lèvre aval 121b.

Conversely, the second downstream lip 121b is adapted to:

• on the one hand create a tight contact against the second wall 44a as long as the fluid pressure in the second space 123b is lower 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 in fluid (gas or liquid) and in overpressure and open towards the discharge outlet 42 to expel this fluid.

The second upstream circular lip 120b is placed closer to the suction inlet 41 than to the discharge outlet 42 and the second downstream circular lip 121b is placed closer to the discharge outlet 42 than to the discharge outlet 42. 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 movable part forms a hollow disc in 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 movable part 45 which is opposite this second wall 44b.

As we understand in particular from the Figure 11 , these second upstream and downstream circular lips 120b, 121b are such that, on a third part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second downstream circular lip 121b provides a seal preventing the passage of fluid from said discharge outlet 42 towards said second space 123b and the second upstream circular lip 120b then authorizing a passage of free fluid between said second space 123b and said suction inlet 41.

It should be noted that this third part of the movement of the moving part which is symmetrical to the first part P1 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 moved away from one of said second wall 44b or movable part 45 to generate a passage of free fluid, i.e. 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 towards the downstream and open towards the upstream, we obtain an effect of suction of fluid from the suction inlet 41 towards the second space 123b by moving the moving part 45 away from the second wall 44b.

• d'une part autoriser le passage de fluide entre ledit second espace 123b et ladite sortie de refoulement 42 lorsqu'une pression de fluide à l'intérieure du ledit second espace 123b est supérieure à une pression de fluide au niveau de la sortie de refoulement 42 ; et pour
• d'autre part interdire le passage de fluide ladite sortie de refoulement 42 vers ledit second espace 123b.

As we understand in particular from the Figure 11 , these second upstream and downstream circular lips 120b, 121b are such that on a fourth part of said reciprocating movement of said movable part 45 relative to the chamber 44, the second upstream circular lip 120b provides a seal preventing the passage of fluid from said second space 123b towards said suction inlet 41, the second downstream circular lip 121b being arranged to:

• on the one hand authorize 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 for
• on the other hand prohibit the passage of fluid from said discharge outlet 42 to said second space 123b.

Thus, on this fourth part of said reciprocating movement, as the second space 123b is closed towards the upstream and opened towards the 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 is obtained from the second space 123b towards the discharge outlet 42 by bringing the movable part 45 closer to the second wall 44b.

The reciprocating movement of the moving 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 discharge outlet 42.

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

It should be noted that the number of lips on each side may vary.

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 shape of a disc not hollowed out in its center), either because it is the moving 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 prevent 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, the differential pressure generated between the discharge outlet and the suction inlet of the pump can be increased.

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

It has been noted that under certain conditions, a given lip can press against a support of this lip (the chamber wall or the moving part) and act as a suction cup.

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

To avoid this, as shown in the figures 7 , 11 and 12 , 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 rest against its support, fluid can continue to circulate between this lip and its support. This avoids the suction effect.

• des bossages portés par la lèvre donnée et orientés vers son support ; et/ou
• des bossages portés par le support et orientés vers la lèvre donnée qu'il supporte ; et/ou
• des canaux (zones creuses) portés par la lèvre donnée et orientés vers son support ; et/ou
• des canaux (zones creuses) portés par le support et orientés vers la lèvre donnée qu'il supporte.

To do this, we can either create shape irregularities between the given lip and its support such that

• 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.

The fact of having a boss or a channel carried by a lip induces privileged deformation zones on the lip which can induce pressure losses detrimental to the operation of the pump.

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

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

The fluid connection between the pump 4 and the device 1 is preferably made using a manually actuable connection, that is to say capable of switching manually, without tools, from a state of coupling of the device with the pump to a state of decoupling of the device with the pump and vice versa.

This connection may include a quick connection and/or a connection with an idle nut allowing tightening by screwing to tighten the pipe on the pump without the need for relative pivoting of the device 1 with respect to the pump 4.

Preferably, we ensure that this connection includes an O-ring sealing as soon as there is a fitting of the pipe with respect to the fitting to a fitting depth greater than at least one thread pitch of the connection. crazy nut.

Thus, manually, without requiring a tool, you can quickly switch from the cellar emptying 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 pumping liquid from the ground.

This is particularly advantageous for limiting the effects of flooding since the suction of liquid begins as soon as possible. Likewise, the device 1 makes it possible to suck up liquid from 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 mode of assembly between the device 1 and the pump 4, the pump 4 comprises feet 43 whose ends are coplanar with the support face of the device 1 when the first end 3a of the pipe 3 of the device is connected fluidly to said suction inlet 41.

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

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 discharge outlet 42 of the pump 4 extend longitudinally in a common plane which is parallel to said support face of the device.

In a second mode of assembling the pump 4 with the device 1 (see the 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 support face of the device is positioned on a flat ground S to suck up liquid, the pump 4 is then supported by this device 1.

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

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

Here the suction inlet 41 extends longitudinally in a direction of extension which is perpendicular to said support 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 empty configuration ( figures 9 And 10 ).

In liquid transfer configuration ( figure 8 ), 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. In this way, liquid can be transferred using the pump without this liquid passing through the device.

In the cellar empty 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 to filter the fluid sucked in by the pump.

It should be noted that the attachment 47 is here an excrescence (here a threaded excrescence) on which the first end 3a of the pipe 3 of the device 1 fits.

Claims (20)

1. A device (1) for sucking up liquid on a floor (S), the device (1) having an outside wall (10) defining a first enclosure (E1) 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 (E1) to inside the first enclosure (E1), the device (1) having a pipe (3) presenting a first end (3a) arranged for putting into fluid flow connection with a liquid suction pump (4) and a second end (3b) of the pipe (3) in fluid flow connection with said first enclosure (E1) so as to be able to suck liquid present in the first enclosure (E1) into said pipe (3), wherein the device (1) includes an inside wall (20) defining a second enclosure (E2), the second enclosure (E2) being open at least via openings (21) formed through the inside wall (20) so as to allow liquid to pass from the first enclosure (E1) into the second enclosure (E2) and said second end (3b) of the pipe opening out into the inside of the second enclosure (E2) at a distance from the first enclosure (E1) and wherein:

   · the openings (21) formed through the inside wall (20) are formed exclusively between a suction limit plane (Pla) for sucking through the inside wall and a bearing plane (P1b) of the inside wall; and

   · the openings (11) formed through the outside wall (10) are formed exclusively between a suction limit plane (P2a) for sucking through the outside wall and a bearing plane (P2b) of the outside wall, at least some of the openings formed through the outside wall being formed between the suction limit plane (P2a) for sucking through the outside wall and the suction limit plane (Pla) for sucking through the inside wall.
2. A device (1) according to claim 1, wherein said second enclosure (E2) is located inside said first enclosure (E1).
3. A device according to any one of claims 1 or 2, wherein the suction limit plane (Pla) for sucking through the inside wall is spaced from the suction limit plane (Pla) for sucking through the inside wall by a maximum height of 1 centimeter.
4. A device according to any one of claims 1 to 3, wherein at least some of the openings (11) formed through the outside wall (10) extend between the suction limit plane (Pla) for sucking through the inside wall and the bearing plane (P1b) of the inside wall.
5. A device according to claim 3 or claim 4, wherein the bearing plane (P1b) of the inside wall and the bearing plane (P2b) of the outside wall are mutually coplanar.
6. A device according to any one of claims 1 to 5, wherein said:

   · suction limit plane (Pla) for sucking through the inside wall;

   · bearing plane (P1b) of the inside wall;

   · suction limit plane (P2a) for sucking through the outside wall; and

   · bearing plane (P2b) of the outside wall;

   are mutually parallel planes.
7. A device according to any one of claims 1 to 6, including a bottom piece (22) bearing against the inside wall (20), the bottom piece (22) forming a bottom face of the second enclosure (E2).
8. A device according to claim 7, wherein the bottom piece (22) comprises a bottom plate (22a) forming the bottom face of the second enclosure (E2) together with ribs (22b), each of the ribs (22b) extending perpendicularly relative to said bottom plate (22a), each of these ribs having a first terminal end arranged facing the inside wall (20) and a second terminal end arranged in a central zone of the second enclosure (E2) into which the second end (3b) of the pipe (3) opens out.
9. A device according to claim 7 or claim 8, wherein the second enclosure (E2) is open towards a bottom plane (PF) in which a major portion of said bottom piece 22 extends.
10. A device according to claim 7 or claim 8, including a rod (40) extending inside the second enclosure (E2), the rod (40) extending from a top face of the second enclosure (E2) to a central zone of said bottom piece (22), the rod (40) and the bottom piece (22) being mechanically assembled one against the other.
11. A device according to any one of claims 1 to 10, wherein all of the openings 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) .
12. An assembly (100) for sucking up liquid on a floor (S), the assembly comprising the device (1) according to any one of claims 1 to 11 and a liquid suction pump (4) 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) adapted to detect liquid reaching a level relative to the pump (4), the control unit being arranged to cause the pump (4) to operate in response to the probe (50) detecting liquid at said level.
13. An assembly (100) according to claim 12, wherein the pump (4) includes 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 put releasably into fluid flow connection with said suction inlet (41) 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), the pump (4), under the effect of its own weight, opposes the device (1) moving away from said plane floor (S).
14. An assembly (100) according to claim 13, wherein the pump (4) has legs (43) with ends that are coplanar with the bearing face of the device (1) when the first end (3a) of the pipe (3) of the device is in fluid flow connection with said suction inlet (41).
15. An assembly according to claim 13, wherein the pump (4) is assembled with the first end (3a) of 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) in order to suck up liquid therefrom, the pump (4) is then supported by the device (1).
16. An assembly according to any one of claims 13 to 15, wherein the pump (4) is self-priming when dry.
17. An assembly according to any one of claims 13 to 16, wherein 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 (46) being connected to the movable part (45) by a coupling mechanism in such a manner that actuating the electric motor (46) causes the movable part (45) to perform reciprocating motion relative to the chamber in order to move a fluid from the suction inlet to the discharge outlet.
18. An assembly according to claim 17, wherein the pump includes a circular first upstream lip (120a) placed closer to the suction inlet (41) than to the discharge outlet (42) and a circular first downstream lip (121a) placed closer to the discharge outlet (42) than to the suction inlet (41), these circular first upstream and downstream lips (120a, 121a) being placed between one of the sides of said movable part (45) and a first wall (44a) of the chamber (44) to define a first space (123a) between the circular first upstream and downstream lips (120a, 121a), these circular first upstream and downstream lips (120a, 121a) being such that:

    · over a first portion (P1) of said reciprocating movement of said movable part (45) relative to the chamber (44), the circular first downstream lip (121a) provides sealing preventing fluid from passing from said discharge outlet (42) to said first space (123a), the circular first upstream lip (120a) then allowing free passage for fluid between said first space (123a) and said suction inlet (41); and that

    · over a second portion (P2) of said reciprocating movement of said movable part (45) relative to the chamber (44), the circular first upstream lip (120a) provides sealing preventing fluid from passing from said first space (123a) to said suction inlet (41), the circular first downstream lip (121a) being arranged:

    · firstly to allow fluid to pass between said first space (123a) and said discharge outlet (42) when the fluid pressure inside said first space (123a) is higher than the fluid pressure at the discharge outlet (42); and

    · secondly to prevent fluid from passing from said discharge outlet 42 to said first space 123a.
19. An assembly (100) according to any one of claims 13 to 18, wherein the device (1) for sucking up liquid on a floor (S) forms a stand for supporting the pump (4).
20. An assembly (100) according to any one of claims 13 to 18, wherein the assembly is adapted to adopt selectively either a liquid transfer configuration or a basement-drainer configuration, in the liquid transfer configuration, the device (1) is assembled to an attachment fitting (47) of the pump (4) situated at a distance from the suction inlet (41) of the pump, and in the basement-drainer configuration, the device (1) is in fluid flow connection with the suction inlet (41) of the pump, the device (1) forming a stand for supporting the pump, the device (1) then being arranged to filter the fluid sucked in by the pump.

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