Device and a method for ejecting a fluid

1. A device for ejecting a fluid comprising:

a main pipe;

a rotatable housing connected to the main pipe;

a hub provided with a nozzle, the hub being rotatably connected to the housing;

the fluid being arranged to be conveyed through the main pipe and the housing to the nozzle for ejection of the fluid;

the hub being arranged to rotate about an axis oriented at an angle α in relation to a longitudinal axis of the main pipe;

a connection part arranged between the main pipe and the housing, the connection part comprising a bent pipe, a first end of which is connected to the main pipe and a second end of which is connected to the housing; and

the angle α between the axis of the hub and the longitudinal axis of the main pipe being arranged to vary between 90−β and 90+β, 2≤β≤45, when the housing rotates one revolution, such that the main pipe is hit by the fluid from the nozzle at a varying height.

2. A device according to claim 1 , wherein the housing is rotatably connected to the main pipe.

3. A device according to claim 1 , wherein a direction of fluid ejection from the nozzle is essentially perpendicular to the axis about which the hub is arranged to rotate.

4. A device according to claim 1 , wherein the housing is arranged to rotate about an axis arranged with an angle γ≠0 in relation to the longitudinal axis of the main pipe.

5. A device according to claim 1 , wherein a rotational speed of the housing differs from a rotational speed of the hub.

6. A fluid ejecting device positioned in an interior of a tank or container, the tank or container including an inside wall, the fluid ejecting device comprising:

a main pipe positioned in the interior of the tank or container, the main pipe possessing a longitudinal axis and a longitudinal extent;

a rotatable housing connected to the main pipe to rotate about a housing rotation axis relative to the main pipe and positioned in the interior of the tank or container;

a bent pipe possessing one end connected to the main pipe and an opposite end connected to the housing;

a rotatable hub rotatably connected to the housing so that the rotatable hub rotates relative to the housing about a hub rotation axis, the rotatable hub being positioned in the interior of the tank or container;

a nozzle arranged on the rotatable hub to rotate together with the rotatable hub;

the main pipe, the housing, the bent pipe, the rotatable hub and the nozzle being configured so that fluid introduced into the main pipe is conveyed through the main pipe, through the rotatable housing, through the bent pipe and through the rotatable hub, and is ejected through the nozzle; and

the hub rotation axis forming an angle α in relation to the longitudinal axis of the main pipe, the angle α between the hub rotation axis and the longitudinal axis of the main pipe varying between 90−β and 90+β, 2≤β≤45, when the housing rotates one revolution, so that the fluid ejected by the nozzle hits the main pipe at different locations along the longitudinal extent of the main pipe.

7. The fluid ejecting device positioned in the interior of the tank or container according to claim 6 , wherein the housing is rotatably connected to the main pipe.

8. The fluid ejecting device positioned in the interior of the tank or container according to claim 6 , wherein the nozzle is configured so that the fluid ejected from the nozzle is essentially perpendicular to the hub rotation axis.

9. The fluid ejecting device positioned in the interior of the tank or container according to claim 6 , wherein the housing rotation axis forms an angle γ≠0 relative to the longitudinal axis of the main pipe.

10. The fluid ejecting device positioned in the interior of the tank or container according to claim 6 , wherein the hub rotation axis is essentially perpendicular to the housing rotation axis.

11. A method for ejecting a fluid comprising

providing a main pipe, a rotatable housing connected to the main pipe and a hub provided with a nozzle, said hub being rotatably connected to the housing,

conveying the fluid through said main pipe, further through the housing and to said nozzle,

ejecting the fluid trough the nozzle,

rotating the hub about an axis arranged with an angle α in relation to a longitudinal axis of the main pipe,

providing a connection part between the main pipe and the housing, the connection part including a bent pipe between the main pipe and the housing, a first end of the bent pipe being connected to the main pipe and a second end of the bent pipe being connected to the housing, and

varying the angle α between the axes between 90−β and 90+β, 2≤β≤45, when the housing rotates one revolution, such that the main pipe is hit by the fluid from the nozzle at a varying height.

12. A method according to claim 11 , comprising ejecting the fluid through the nozzle in a direction essentially perpendicular to the axis about which the hub is rotated.

13. A method according to claim 11 , comprising rotating the housing in relation to the main pipe about an axis.

14. A method according to claim 11 , comprising providing the axis with an angle γ≠0 in relation to the longitudinal axis of the main pipe.

15. A method according to claim 11 , comprising rotating the housing and the hub with different rotational speeds.