Pumping station for a tank pump

2:

• The pumping station according to claim 1, wherein the end-position connection pieces (6) of the hollow shaft (4) and/or the shaft tube (5) is/are configured to be elliptical, in particular round, or polygonal or polygon-shaped in cross-section.

3:

• The pumping station according to one claim 1, wherein the end-position connection pieces (6) of the hollow shaft (4) are formed to be identical, and the hollow shaft (4) has mirror symmetry.

4:

• The pumping station according to claim 1, wherein the pumping station (1), the pump tube (2), the rotor (3), as well as the hollow shaft (4) are connected to one another in a releasable manner, in particular releasable without tools, and preferably have thread-free, manually releasable quick-release connections.

5:

• The pumping station according to claim 1, wherein the hollow shaft (4) is mounted in a holding element (10) on the rotor side, so as to rotate.

6:

• The pumping station according to claim 5, wherein the holding element (10) is a bearing that forms a cylinder that is flattened on at least one side, wherein the cylinder has a central passage opening to accommodate the hollow shaft and preferably adjacent media passages.

7:

• The pumping station according to claim 5, wherein the holding element (10) is accommodated on the hollow shaft (4) so as not to rotate, and wherein in the pump tube (2), a preferably welded-in or formed-in stop is provided, which prevents further rotation of the holding element (10) in the assembled state.

8:

• The pumping station according to claim 1, wherein at least one of the hollow shaft (4), the rotor (3), and a pump foot (7) arranged on the pump tube (2) in the end position is produced from a chemical-resistant, preferably inert material, in particular stainless steel.

9:

• The pumping station according to claim 8, wherein seals are assigned to the pump tube (2), wherein the seals are produced from a chemical-resistant material, preferably from ethylene-propylene-diene rubber or fluorine rubber.

10:

• The pumping station according to claim 1, wherein the transition between the pump tube (2) and the hollow shaft (4) is sealed off by a sliding-ring seal (8), and the sliding-ring seal (8) is held in its position in the pump tube (2), relative to the hollow shaft (4), by a steel spring (9).

11:

• The pumping station according to claim 1, wherein all the contours within the pump tube (2) have smooth surfaces and smooth connection transitions.

12:

• The pumping station according to claim 1, wherein a through-flow counter for a precise amount determination of the volume stream is assigned either to the pump tube (2) or to an outlet.