Volume Measurement and/or Metering Device and Method for Operating a Volume Measurement and/or Metering Device

Abstract

A volume measurement and/or metering device includes a cylinder/piston and cock system for sucking in and/or discharging liquids in a defined way, the piston being movable in relation to the cylinder for sucking in or discharging the liquid. The cylinder is mounted, together with the cylinder bottom, rotatably with respect to the cock system about an axis of rotation parallel to the cylinder longitudinal axis. The cylinder bottom bears with a sealing seat against a cock element of the cock system, the cock element having at least one duct orifice. These orifices are arranged in such a way that the at least one orifice in the cylinder bottom can be brought into congruence with the orifices of the cock element when the cylinder and the cylinder bottom are rotated. Further, means for simultaneously closing of all the orifices of the cylinder bottom are provided.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Preferred embodiments of the invention are explained below by means of drawings in which:

FIG. 1 shows a diagrammatic illustration of a volume measurement and metering device having the features of the invention in section,

FIG. 2 shows a top view of the actuation device and the cylinder/piston/cock system in the direction of the arrows AA and B-B in FIG. 1,

FIG. 3 shows a section in the plane C-C and D-D in FIG. 1, and

FIG. 4 shows an alternative device in a section in the plane CC and D-D in FIG. 1.

Claims

1. Volume measurement and/or metering device with a cylinder/piston and cock system for sucking in and/or discharging liquids in a defined way, a piston being movable in relation to a cylinder for sucking in or discharging the liquid, the cylinder being mounted, together with the cylinder bottom, rotatably with respect to the cock system about an axis of rotation parallel to the cylinder longitudinal axis, the cylinder bottom bearing with a sealing seat against a cock element of the cock system having at least one duct orifice, and these orifices being arranged in such a way that the at least one orifice in the cylinder bottom can be brought into congruence alternately with the orifice or orifices of the cock element when the cylinder and cylinder bottom are rotated, wherein means for the simultaneous closing of all the orifices of the cylinder bottom are provided.

2. Device according to claim 1, wherein in at least one predetermined settable closing position of the cock system, all the orifices of the cylinder bottom are closed by the cock element.

3. Device according to claim 2, wherein a control arrangement for the controlled setting of the positions of the cylinder bottom relative to the cock element is provided.

4. Device according to claim 2, wherein a measurement arrangement for determining the at least one closing position of the cylinder bottom relative to the cock element is present, so that controlled operation of the device is possible.

5. Device according to claim 1, wherein the orifices are arranged asymmetrically in the cock element.

6. Device according to claim 1, wherein a valve is provided for closing the at least one orifice in the cylinder bottom.

7. Method for operating a volume measurement and/or metering device with a cylinder, piston and cock system for sucking in and/or discharging liquids in a defined way, the piston being moved in relation to the cylinder for sucking in or discharging the liquid, the cylinder being mounted, together with the cylinder bottom, rotatably with respect to the cock system about an axis of rotation parallel to the cylinder longitudinal axis, and the cylinder bottom bearing with a sealing seat against a cock element of the cock system having at least one duct orifice, wherein the cock system is brought into predetermined settable positions in such a way that either the at least one orifice in the cylinder bottom is brought into congruence with the orifices of the cock element for sucking in or discharging the liquids, or that the at least one orifice in the cylinder bottom is closed.

8. Method according to claim 7, wherein the cylinder bottom is brought into such a position relative to the cock element that the cock element is in a sealing closing position with all orifices of the cylinder bottom, thereby simultaneously closing all the orifices of the cylinder bottom.

9. Method according to claim 7, wherein the cock system is brought into the predetermined settable position in an automated way by means of a control arrangement.

10. Method according to claim 7, wherein the position of the cylinder bottom relative to cock element is checked by means of a measurement arrangement.