Underwater conveying assembly with a pump and with a drive device

1. Underwater conveying assembly comprising:

a pump;

a drive device connected to drive the pump, the drive device being sealed off with respect to the surrounding water and with respect to a process medium;

the pump and the drive device being combined into a module, and the pump having at least two inlet ports and at least one outlet port;

a casing which widens downwardly to form a collecting element, the module being arranged within the casing and the collecting element, between the casing and the module a collection space is formed; and

at least one suction tube which extends in the axial extent of the pump and is arranged extending inside the collecting element so that it can be introduced into a conveying hole and is flow-connected to one of the at least two inlet ports; and

a suction pipe connected to said at least one suction tube at a first position inside the collecting element and connected to said one of the at least two inlet ports of the pump at a second position, relatively farther inside the collecting element than said first position,

wherein a first flow path comprises said at least one suction tube, said suction pipe and at least one of said inlet ports in sequence and a second flow path comprises said collection space, said suction pipe, and at least one of said inlet ports in sequence, and wherein the pump is configured to receive process medium through either of said first and second flow paths individually and from both of said paths simultaneously.

2. Underwater conveying assembly according to claim 1 , wherein the collection space is designed as an annular space around the module.

3. Underwater conveying assembly according to claim 1 , wherein the collecting element is designed as a funnel, as a bell or as a funnel-like device which tapers in the direction of said at least two inlet ports.

4. Underwater conveying assembly according to claim 1 , wherein the suction pipe and the suction tube are flow-connected to one another.

5. Underwater conveying assembly according to claim 4 , further comprising an adjustable valve is provided which controls the distribution of the throughflow quantity from the suction pipe and the suction tube to said at least two inlet ports.

6. Underwater conveying assembly according to claim 1 , further comprising sensor devices on the collecting element for detecting the temperature, the outlet pressure and/or the concentration of admixtures in the surrounding water to make possible the positioning of the underwater conveying assembly above an outlet point of hydrocarbons.

7. Underwater conveying assembly according to claim 1 , further comprising devices for treating the process medium, for the separation of solids and/or for the supply of aggregates are located in the collecting element.

8. Underwater conveying assembly according to claim 1 , further comprising a recirculation line from a pressure space of the pump to a suction space of the pump through which a separated liquid phase is delivered to a suction space of the pump in a metered way in order to avoid dry running in the event of a predominant conveyance of gas phases.

9. Underwater conveying assembly according to claim 1 , further comprising at least one nonreturn valve connecting an inlet side and an outlet side of the underwater conveying assembly which ensures a free passage of the process medium, even when the pump is not activated.

10. Underwater conveying assembly according to claim 1 , further comprising heating devices arranged in the collecting element or in said collection space.

11. Underwater conveying assembly according to claim 1 , further comprising anchoring devices arranged on the collecting element or said casing.

12. Underwater conveying assembly according to claim 1 , wherein the suction tube projects beyond the height of the collecting element.

13. Underwater conveying assembly according to claim 1 , wherein the pump is a screw spindle pump.

14. Underwater conveying assembly, comprising:

a pump;

a drive device connected to drive the pump, the drive device being sealed off with respect to the surrounding water and with respect to a process medium;

the pump and the drive device being combined into a module, and the pump having at least one inlet port and at least one outlet port;

a casing which widens downwardly to form a collecting element, the module being arranged within the casing and the collecting element, between the casing and the module a collection space is formed; and

at least one suction tube which extends in the axial extent of the pump and is arranged extending inside the collecting element so that it can be introduced into a conveying hole and is flow-connected to the at least one inlet port; and

a suction pipe connected to said at least one suction tube at a first position inside the collecting element and connected to said at least one inlet port of the pump at a second position, said suction pipe having at least one inlet relatively farther inside the collecting element that said first position,

wherein a first flow path comprises said at least one suction tube, said suction pipe, and said at least one inlet port in sequence, and a second flow path comprises said collection space, said inlet, said suction pipe, and said at least one inlet in sequence, and wherein the pump is configured to receive the process medium through said either of said first and second flow paths individually and from both of said paths simultaneously.