Double diaphragm pump

Abstract

A diaphragm pump, in which a fluid moves at least a first piston of a first piston / cylinder system back and forth, the first piston being mechanically connected to at least one other hydraulic piston and the hydraulic piston driving at least one diaphragm by a hydraulic medium.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is the U.S. National Phase Patent Application of PCT International Application No. PCT / EP2011 / 001360, filed Mar. 18, 2011, which claims priority to German Patent Application No. 10 2010 013 108.3, filed Mar. 26, 2010, the contents of such applications being incorporated by reference herein.FIELD OF THE INVENTION[0002]The present invention relates to a diaphragm pump having at least one diaphragm.BACKGROUND OF THE INVENTION[0003]In diaphragm pumps, the diaphragm delimits a conveying space in which a supply line and a discharge line open. Generally, non-return valves are arranged in the supply and discharge lines in such a manner that, by the diaphragm being moved back and forth, the conveying medium can first be drawn via the supply line into the conveying space and can subsequently be pressed out of the conveying space via the discharge line.[0004]So that a continuous conveying action is possible, in most cases two diaphr...

AI Technical Summary

Benefits of technology

The present invention provides a diaphragm pump with the following technical effects: a long service life of diaphragms, low differential pressures, good efficiency, and a maximum service life of about 8,000 hours. The pump uses an inert fluid to prevent contamination of the conveyed medium. The main valve can also be easily cleaned, repaired, or replaced, and the valve control element has a 4 / 2 way or 5 / 2 way design to achieve better efficiency. The switching valves may have throttles to slow down the movement of the valve control element and allow for longer phase of pressure compensation. Overall, this patent provides a reliable and efficient diaphragm pump for various applications.

Problems solved by technology

The disadvantage of this pump is that the diaphragms, owing to the high pressure in the conveying space and the ambient pressure behind the diaphragm, are subjected to a high differential pressure load, which leads to rapid wear in the diaphragms.

The disadvantage of this pump is that, in the event of a defect of the diaphragm, the conveying medium reaches the pneumatic system and disables the valves and consequently the entire pump.

The pump can subsequently be restarted, if at all, only with great complexity.

The disadvantage of this pump involves the large spaces which must be filled with compressed air after the dead centre point has been reached so that the diaphragms can be moved in the other direction.

A very large amount of compressed air is thereby required, which increases the maintenance costs of the pump.

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