Hydraulically driven diaphragm pump with a magnetic coupled diaphragm assembly

Abstract

characterized in that the diaphragm stop element has a recess, into which the tie rod and/or the magnet connected to the tie rod is inserted, so that the diaphragm assembly is centred with respect to the tie rod.

1 . A diaphragm pump, comprising:
 a diaphragm assembly comprising a diaphragm and a diaphragm stop device fixing the diaphragm, and   a diaphragm return device comprising a tie rod,   wherein the diaphragm assembly and the tie rod are connected to each other with a magnetic adhesive force, and wherein a first magnet for providing the magnetic adhesive force is arranged on or in the area of the tie rod, and   wherein the diaphragm stop device has a recess, into which the tie rod and/or the first magnet connected to the tie rod is inserted, so that the diaphragm assembly is centred with respect to the tie rod.   
     
     
         2 . The diaphragm pump of  claim 1 , wherein the magnetic adhesive force is greater than or equal to the maximum required return force of the diaphragm during the operation of the diaphragm pump. 
     
     
         3 . The diaphragm pump of  claim 1 , wherein the diaphragm stop device comprises a diaphragm stop disc and a diaphragm stop element connected to the diaphragm stop disc, the diaphragm being arranged between the diaphragm stop disc and the diaphragm stop element. 
     
     
         4 . The diaphragm pump of  claim 1 , further comprising a second magnet for providing the magnetic adhesive force, the second magnet being arranged on or in the area of the diaphragm stop element. 
     
     
         5 . The diaphragm pump of  claim 4 , wherein the first magnet is arranged on or in the area of the end of the tie rod that faces the diaphragm, and the second magnet is arranged with reversed polarity opposite the first magnet in the area of the diaphragm stop element, wherein the first magnet together with the second magnet provides the magnetic adhesive force. 
     
     
         6 . The diaphragm pump of  claim 1 , further comprising a third magnet for providing the magnetic adhesive force is arranged in the area of the diaphragm stop element or in the area of the end of the tie rod that faces the diaphragm but is not connected to the diaphragm stop element or the tie rod. 
     
     
         7 . The diaphragm pump of  claim 4 , wherein the tie rod has a recess, into which the diaphragm stop element or the second magnet that is connected to the diaphragm assembly is inserted. 
     
     
         8 . The diaphragm pump of  claim 1 , wherein the recess is at least partly rectangular, trapezoidal or semi-cylindrical in its cross section. 
     
     
         9 . The diaphragm pump of  claim 1 , wherein the first magnet is formed in the shape of a disc magnet, a conical magnet, a spherical magnet or a ring magnet. 
     
     
         10 . The diaphragm pump of  claim 1 , wherein the first magnet is a permanent magnet or an electromagnet. 
     
     
         11 . The diaphragm pump of  claim 1 , wherein the first magnet has a corrosion-resistant coating. 
     
     
         12 . The diaphragm pump of  claim 1 , wherein the first magnet comprises a thread, a recess or a projection that is designed and configured to detach the connection between the first magnet and the tie rod or the first magnet and the diaphragm stop element. 
     
     
         13 . The diaphragm pump of  claim 1 , wherein the first magnet is connected to the surface of the tie rod or the surface of the diaphragm stop element using an adhesive. 
     
     
         14 . The diaphragm pump of  claim 1 , wherein the depth of the recess of the diaphragm stop element is greater than the height of that part of the tie rod or the first magnet that is connected to the tie rod when inserted into the recess. 
     
     
         15 . A pump, comprising:
 a diaphragm assembly comprising a diaphragm and a diaphragm stop device fixing the diaphragm, and   a diaphragm return device comprising a tie rod, wherein the diaphragm assembly and the tie rod are connected to each other with a magnetic adhesive force,   a first magnet for providing at least a portion of the magnetic adhesive force, the first magnet arranged on or in the area of the tie rod,   a second magnet for providing at least a portion of the magnetic adhesive force, the second magnet being arranged on or in the area of the diaphragm stop element; and   a third magnet for providing at least a portion of the magnetic adhesive force, the third magnet arranged in the area of the diaphragm stop element or in the area of an end of the tie rod that faces the diaphragm but is not connected to the diaphragm stop element or the tie rod,   wherein the diaphragm stop device has a recess, into which the tie rod and/or the first magnet connected to the tie rod is inserted, so that the diaphragm assembly is centred with respect to the tie rod.   
     
     
         16 . The pump of  claim 15 , wherein each magnet is formed in the shape of a disc magnet, a conical magnet, a spherical magnet or a ring magnet. 
     
     
         17 . The pump of  claim 15 , wherein each magnet is as a permanent magnet or an electromagnet. 
     
     
         18 . The pump of  claim 15 , wherein at least one of the magnets has a corrosion-resistant coating.