Diaphragm pump and device for controlling same
AssigneeBran & Luebbe GmbH
InventorNorbert Siegel
Life of this patent
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Abstract
The invention relates to a diaphragm pump with a device for controlling the position of a diaphragm separating the conveying chamber from the displacement chamber. As a replacement of the mechanical control of the refilling process, a pressure sensor is arranged in the displacement chamber, which is connected with an evaluation unit designed for generating a refill signal, which is switched so it actuates a refill valve through an operative connection. Advantageously, a second sensor for detecting the piston travel is provided, whose signal is linked with the signal from the pressure sensor. The invention furthermore relates to a method for controlling the position of a diaphragm.
Claims12
A diaphragm pump with a device for controlling the position of a diaphragm that separates a conveying chamber from a displacement chamber, and with a reservoir for a hydraulic medium, which is in connection with the displacement chamber via a refilling unit, comprising:
- a pressure sensor arranged in the displacement chamber, said pressure sensor being connected to an evaluation unit designed for generating a refill signal, so that a refill unit is actuated by means of an operative connection.
A method for controlling the position of a diaphragm that separates a conveying and a displacement chamber of a diaphragm pump and is driven by an oscillating displacer by means of a hydraulic medium, wherein the displacement chamber can be refilled via a line with the hydraulic medium as required, comprising the steps of:
- detecting the pressure in the displacement chamber by a sensor;
- conducting a signal to an evaluation unit;
- and
- in accordance with a defined algorithm, causing the refilling of the displacement chamber with hydraulic medium.
Dependencies are inferred from the claim text.