Pump device
AssigneeGrundfos Holding A/S
InventorAllan Jessen
Life of this patent
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Abstract
A pump device (2), to be mounted coaxially in a pipe (3), includes an axial or mixed flow pump with a guide tube (7) arranged around a propeller portion of the pump device (2). In a mounting position, a gap (11) is formed between an upper end (16) of the guide tube (7) at an outlet portion (8) of the pump device (2) and the column pipe (3). The guide tube (7) has an elastic portion (12) connected to an outlet end of the guide tube (7). The elastic portion (12) is bendable in a radial direction towards the column pipe (3) in order to at least partially, in particular completely, close the gap (11) during operation of the pump device (2). Further, a pump system (1) includes the pump device (2).
Claims20
A pump device to be mounted coaxially in a pipe, the pump device comprising an axial or mixed flow pump comprising:
- a pump device propeller portion;
- and
- a guide tube arranged around the pump device propeller portion of the pump device, wherein the guide tube has an elastic portion at it's a guide tube outlet end which elastic portion is bendable in a radial outward direction.
A pump system comprising:
- a pump device;
- a surrounding pipe, the pump device being mounted coaxially in the pip, the pump device comprising:
- a pump device propeller portion;
- and
- a guide tube arranged around the propeller portion of the pump device, wherein the guide tube has an elastic portion at a guide tube outlet end, which elastic portion is bendable in a radial outward direction.
Dependencies are inferred from the claim text.