Intake device and a pump station
In a first aspect the invention relates to an intake device ( 3 ) for creating a uniform flow of liquid entering a pump ( 4 ), which flow of liquid is free from rotation and swirls about the inlet of said pump. The inlet device ( 3 ) comprises an inlet section ( 11 ) having an orifice ( 14 ) and a decreasing cross section area seen in the direction from said orifice ( 14 ) for gradually accelerating a flow of pumped liquid, a redirection section ( 12 ) for redirecting the flow of pumped liquid from a mainly horizontal direction to a mainly vertical direction, and an outlet section ( 13 ) arranged to be connected to an inlet ( 6 ) of a pump ( 4 ). The device is characterized in that at least a part of a circumferential wall edge of said inlet section ( 11 ) extending around said orifice ( 14 ) comprises a bevel ( 17 ). In a second aspect the invention also relates to a pump station comprising such an intake device.
1. An intake device ( 3 ) for creating a homogenous flow of liquid entering a pump ( 4 ), comprising
an inlet section ( 11 ) having an orifice ( 14 ) and a decreasing cross section area seen in the direction from said orifice ( 14 ) for accelerating a flow of pumped liquid,
the orifice ( 14 ) being disposed mainly vertically,
a redirection section ( 12 ) for redirecting the flow of pumped liquid from a mainly horizontal direction to a mainly vertical direction, and
an outlet section ( 13 ) arranged to be connected to an inlet ( 6 ) of a pump ( 4 ),
wherein at least a part of a circumferential wall edge of said inlet section ( 11 ) extending around said orifice ( 14 ) comprises a bevel ( 17 ),
the bevel ( 17 ) comprising a plane surface, and
the bevel ( 17 ) being arranged in connection with generally vertical parts of the circumferential wall edge of the inlet section ( 11 ) extending around the orifice ( 14 ).
2. The intake device ( 3 ) according to claim 1 , wherein said bevel ( 17 ) comprises several plane facet surfaces.
3. The intake device ( 3 ) according to claim 1 , wherein the intake device ( 3 ) comprises at least one guide vane ( 18 ) arranged in said inlet section ( 11 ) adjacent to said orifice ( 14 ), and positioned perpendicular to the orifice ( 14 ) of the inlet section ( 11 ).
4. A pump station ( 1 ) comprising at least one pump ( 4 ) and at least one intake device ( 3 ) connected to an inlet ( 6 ) of said pump ( 4 ), characterized in, that said intake device ( 3 ) is an intake device ( 3 ) according to claim 1 .
5. The intake device ( 3 ) according to claim 1 , wherein the width of said bevel ( 17 ), in the direction across the orifice ( 14 ) of the inlet section ( 11 ), is at least 1:20 of the width of the said orifice ( 14 ).
6. The intake device ( 3 ) according to claim 5 ,
wherein the intake device ( 3 ) comprises at least one guide vane ( 18 ) arranged in said inlet section ( 11 ) adjacent to said orifice ( 14 ), and positioned perpendicular to the orifice ( 14 ) of the inlet section ( 11 ).
7. A pump station ( 1 ) comprising at least one pump ( 4 ) and at least one intake device ( 3 ) connected to an inlet ( 6 ) of said pump ( 4 ), wherein said intake device ( 3 ) is an intake device ( 3 ) according to claim 6 .
8. A pump station comprising
at least one pump ( 4 ) and at least one intake device ( 3 ) connected to an inlet ( 6 ) of said pump ( 4 ),
wherein the intake device ( 3 ) comprises
means for accelerating a flow of pumped liquid comprising an inlet section ( 11 ) having an orifice ( 14 ) and a decreasing cross section area seen in the direction from said orifice ( 14 )
a redirection section ( 12 ) for redirecting the flow of pumped liquid from a mainly horizontal direction to a mainly vertical direction, and
an outlet section ( 13 ) connected to an inlet ( 6 ) of said pump ( 4 ),
wherein at least a part of a circumferential wall edge of said inlet section ( 11 ) extending around said orifice ( 14 ) comprises a plane surface bevel ( 17 ), and
wherein means for effecting a smooth redirection of liquid comprises the plane surface bevel ( 17 ) at said inlet section ( 11 ) extending at a 45° angle in relation to the orifice ( 14 ) of the inlet section ( 11 ).