Chemie Und Filter Gmbh Verfahrenstechnik Kg

Chemie Und Filter Gmbh

Michael Wally

A fluid flow machine has a diaphragm pump which is driven by an electromagnet and is confined in a pressure-resistant capsule together with the electromagnet as well as with the electronic control unit for the electromagnet. The constituents of the capsule are connected to each other so that they form one or more gaps each having a configuration and dimensions such as to prevent the propagation of flames and/or sparks from the interior of the capsule to the surrounding area. This renders it possible to use the machine in an explosive atmosphere, even if the pump is designed to deliver metered quantities of flammable fluids. A gap of the above outlined character is provided between two portions of the capsule where a reciprocable plunger extends toward the diaphragm. Additional gaps are provided in a removable cover of the capsule at each of several locations where rotary and/or reciprocable adjusting devices extend from the interior of the capsule so that they can be manipulated in order to change the extent of movement of the armature of the electromagnet, to adjust one or more potentiometers or to actuate one or more switches. Further safety gaps can be provided in regions where the terminal or terminals of one or more electric cables extend into the capsule and/or where a light-transmitting cylinder is installed in the capsule to allow for observation of a signal generating device in the interior of the capsule.

Diaphragm pump for use in an explosive atmosphere

A diaphragm pump, particularly for conveying flammable media, has a housing whose interior is divided into a pumping chamber and a second chamber by a deformable diaphragm having a marginal portion which is clamped between two sections of the pump head and being deformable by a cupped member which is biased in one direction by a coil spring and is movable in the other direction by a plunger receiving motion from a motor and being in mere abutment with the bottom wall of the cupped member. The housing defines a first set of gaps which connect the second chamber with the atmosphere and a second set of gaps which connect the atmosphere with the pumping chamber. The dimensions and shapes of the gaps are such that they do not permit the propagation of ignition from the respective chamber to the atmosphere.

Growing community of inventors

Bammental, Germany

Michael Wally