SUBMERSIBLE WATER PUMP

Abstract

The present invention is a transfer or drainage pump, comprising an engine, usually electric, contained in a sealed body, that powers a turbine; said turbine sucks liquid that is close to the suction nozzle, and said liquid is expelled through an outlet duct. The pump includes an external casing with a top lid, a bottom lid and a wall that surrounds the pump, and includes a set of small holes extending over the inferior area of its surface, near the suction nozzle, and a set of bigger holes extending over the superior area of the casing. The present invention also includes a set of space maintainer appliances for the detachment of textile products, sanitary towels, towels, rags that are objects that produce the greater damage to submersible pumps due to the obstruction they can provoke.

Claims

1. A submersible water pump, comprising an external casing surrounding the body of the pump, said casing including a top lid, a bottom lid and a surrounding wall, said wall with small holes near the area where the suction nozzle is located and, in the rest of the surrounding wall, big holes for the passage of water and solid material

2. The submersible water pump of claim 1, comprising a casing where the sum of the area of the small holes where the suction nozzle is located have a minimum total surface for the flow of water of at least of 500 cm2.

3. The submersible water pump of claim 1, comprising a casing where the big holes have a diameter equivalent to the maximum diameter of solids allowed by the turbine.

4. The submersible water pump of claim 1, comprising a casing where the big holes have a diameter almost as big as the maximum diameter of solids allowed by the turbine.

5. The submersible water pump of claim 1, comprising space maintainers appliances to keep objects away from the casing wall.

6. The submersible water pump of claim 5, where the space maintainers appliances include means to fit or be fixed to the casing holes.

7. The submersible water pump of claim 5, where the space maintainers appliances comprise a thin ductile thread, with a certain elasticity, such as a wire, or a plastic thread.

8. The submersible water pump of claim 5, where the space maintainers appliances comprise a wavy U-shape.

9. The submersible water pump of claim 5, where the space maintainers appliances comprises a multiheaded shape.

10. The submersible water pump of claim 5, where the space maintainers appliances comprise a Omega-like head shape.

11. The submersible water pump of claim 5, comprising space maintainers appliances, where the space maintainers appliances include means to fit or be fixed to the casing holes, said space maintainers appliances are formed by a thin ductile thread, with a certain elasticity, such as a wire, or a plastic thread with an omega-like head shape or wavy U-shape, to keep objects away from the casing wall.

12. The submersible water pump of claim 11, comprising an electric flow sensor fixed to the casing wall.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a bottom view in perspective and separated in parts of the present invention, where the relevant parts of said disclosure are an exterior casing (1), big holes (2), small holes (3), engine (4), area of the suction nozzle (5), flow sensor (6), a turbine (8) an outlet duct (9) and a flap valve (7), a top lid of the casing (12) and a bottom lid or base (13).

[0019] FIG. 2 represents an embodiment of the space maintainer appliance with a wavy U-shape (10).

[0020] FIG. 3 represents an embodiment of the space maintainer appliance with a multi headed shape (11).

DETAILED DESCRIPTION OF THE DISCLOSURE

[0021] According to the abovementioned illustrations, the present invention is a transfer and/or drainage pump, comprising an engine (4), usually electric, contained in a sealed body, that powers a turbine (8); said turbine sucks liquid that is close to the suction nozzle (5), and said liquid is expelled through an outlet duct (9).

[0022] The external casing (1) that surrounds the pump, includes a set of small holes (2) extending over the inferior area of its surface, around the casing (1) near the suction nozzle (5), and a set of bigger holes (2) extending over the superior area of the casing (1), said bigger holes (3) having the same diameter as the maximum diameter of solids allowed by the turbine (8). The amount of holes is the maximum possible so as to slow the flow of liquid through the holes, compared to the flow rate of the suction of the turbine, and facilitating the decanting of the solids that do not pass through the holes. To that effect, the sum of the surface of the holes is at least 500 cm2 and will depend on the flow rate of the pump in order to avoid the bomb to vacuum work.

[0023] The external casing includes a top lid (12) and an inferior lid or floor (13). The top lid (12) avoids the flow of residue inside the casing caused by precipitation, furthermore the casing hinders the flow of solids caused by precipitation due to its vertical configuration, such solids accumulating at the bottom of the tank. The inferior lid or floor (13) of the casing isolates the suction nozzle (5) from the muddy substance that accumulates at the bottom of the water tank.

[0024] The pump shows a compact design, where the body of the engine and the outlet duct maintain a parallel configuration and very close one to the other so as to minimize the space occupied by the pump. The structure of the pump is surrounded by the casing at sufficient distance between the perforations and the pump so as not to allow the flow of solids with admissible diameter, but with an excessive length. Thus the recommended distance between the perforations and the proximal parts of the pump will be between one or two diameters from the maximum diameter for the passage of solids allowed by the turbine. With the present embodiment, the hard and heavy solids will precipitate and remain at the bottom of the water chamber, due to the fact that the power of suction is distributed all along the surface of the casing producing a minimum alteration of the flow outside of the same, thanks to the holes without filters of the casing. The soft and light solids that float, in the extent that the length and diameter allow, will enter within the casing and be suctioned by the turbine and expelled through the outlet duct.

[0025] As compared with traditional pumps, every time that the passage of solids is allowed for the same to be expelled by the turbine, the use of a non-mechanical flow sensor will be necessary, especially not one with floating system, as this one could jam when being exposed to solids. Thus, preferably, an electrical or electronic flow sensor will be used. The flow sensor (6) is inserted inside the casing (1), activated when in contact with water and deactivates moments later when contact with water is interrupted.

[0026] Moreover, in the case of pumps for residual waters, the clogging of the holes may be caused by textile material, sanitary towels, paper towels and cleansing material. If the obstruction of the holes surpasses the area necessary for the circulation of water through the casing in accordance with the rate flow of the pump, a vacuum will be produced and in order to preserve the functioning of the pump, the flow sensor (6) will deactivate the engine due to the fact that said sensor is no longer in contact with water.

[0027] The present invention includes a set of space maintainer appliances for the detachment of textile products, sanitary towels, towels, rags that are objects that produce the greater damage to submersible pumps due to the obstruction the can provoke. The space maintainer appliances may have a wavy shape, circular shape or omega like shape, in order to keep flexible products away from the walls of the casing and are affixed to the holes of the casing. The towels, sanitary towels and rags, when being near the casing due to the circulation of water, shall contact with the space maintainer appliances. Such space maintainers does not allow the towels, sanitary towels or rags to reach and obstruct the casing holes, and these flexible objects may precipitate vertically along the space maintainers or be bent or hooked thus avoiding, in such way too, the obstruction of the casing holes.

[0028] As shown in FIGS. 2 and 3, the space maintainers appliances consist on means to keep object away from the casing wall and means to fit or be fixed to the casing holes. A preferred embodiment consists on a thin ductile thread, with a certain elasticity, such as a wire, for example, or a plastic thread. The shape and elasticity of said thin thread allows to press-fit each piece into the holes and makes a sort of barrier at a distance of at least 1 centimetre and preferably equal to the diameter of the hole, that maintains the towels, sanitary towels or rags far from the hole and also avoid that said object from remaining flat, reaching the hole and obstructing it. Thus, the capacity of the pump to pump water before the saturation of textile objects that surround it, is maximized.