Diaphragm pump with two diaphragm heads and two separate pump housings

Abstract

A diaphragm pump ( 1 ) having two diaphragm heads ( 15 ), in each case two diaphragms ( 6 ) and two separate pump housings ( 3 ) in which the connecting rods ( 5 ) for the diaphragms ( 6 ) are arranged, which connecting rods ( 5 ) can be driven by a common shaft ( 4 ). The drive for the shaft ( 4 ) can be arranged between the two pump housings ( 3 ). Here, the two pump housings ( 3 ) are connected to one another in an air-permeable fashion in particular by a connecting line ( 7 ), such that the air displaced in each case by the one diaphragm ( 6 ) can be moved into the other pump housing ( 3 ) in which the associated diaphragm ( 6 ) leads to a space enlargement as a result of being driven in the opposite direction.

1 . A diaphragm pump ( 1 ) comprising two diaphragm heads ( 15 ) and two separate pump housings ( 3 ) and diaphragms ( 6 ) provided therein, with the pump housings ( 3 ) being arranged adjacent to each other, and a drive of the diaphragms ( 6 ) being offset by 180 degrees such that a direction of simultaneous deflection of the diaphragms ( 6 ) of the two pump housings ( 3 ) are opposite each other, the two pump housings ( 3 ) are connected to each other in an air-permeable fashion. 
     
     
         2 . The diaphragm pump according to  claim 1 , wherein as an air-permeable connection at least one connection line ( 7 ) is provided between the two pump housings ( 3 ), which are arranged essentially parallel in reference to each other, and at least one of a cross-section or a flow resistance of the at least one connection line ( 7 ) is sized such that at least a portion or all of the air transported or displaced by a bottom of the diaphragm can be transported into the other respective pump housing ( 3 ). 
     
     
         3 . A diaphragm pump according to  claim 2 , wherein the at least one connection line ( 7 ) connects sides or walls ( 3   a ) of the two pump housings ( 3 ) facing each other. 
     
     
         4 . A diaphragm pump according to  claim 1 , wherein at least one of the two pump housings are of equal size ( 3 ) or a displacement volume of the two diaphragms ( 6 ) per stroke are of equal size. 
     
     
         5 . A diaphragm pump according to  claim 2 , further comprising a common drive shaft for the diaphragms, and at least one seal ( 8 ) is provided in an area of a bearing and penetrating opening for the common drive shaft ( 4 ) at the respective pump housing ( 3 ), with a flow resistance of the seal being greater than the connection line ( 7 ) between the two pump housings ( 3 ). 
     
     
         6 . A diaphragm pump according to  claim 5 , wherein a felt washer is provided as the seal ( 8 ) at each of the bearings ( 9 ) of the drive shaft ( 4 ) in an area of penetration through the pump housings, covering said bearings ( 9 ). 
     
     
         7 . A diaphragm pump according to  claim 6 , wherein the felt washer is provided at least at a side of the bearing ( 9 ) facing towards an interior of the pump housing ( 3 ). 
     
     
         8 . A diaphragm pump according to  claim 2 , wherein each of the respective pump housings ( 3 ) has an intermediate wall ( 10 ) in an area of a connection rod ( 5 ) to separate a crank case ( 11 ) from a motion chamber ( 12 ) of a diaphragm head ( 2 ), the intermediate wall includes a penetration opening ( 13 ) for the connection rod ( 5 ), and the air-permeable connection or connection line ( 7 ) of the two pump housings ( 3 ) is provided between the intermediate wall ( 10 ) and a bottom of the respective diaphragm head ( 2 ). 
     
     
         9 . A diaphragm pump according to  claim 8 , wherein the penetrating opening ( 13 ) has at least one of a close tolerance in the intermediate wall ( 10 ) for the connection rod ( 5 ) in reference thereto or comprises a seal ( 14 ) or a felt washer that contacts the connection rod ( 5 ) and allows for its motion. 
     
     
         10 . A diaphragm pump according to  claim 7 , wherein the felt washer is provided at a side of the bearing facing away from an interior of the pump housing ( 3 ). 
     
     
         11 . A diaphragm pump according to  claim 6 , wherein the felt washer is provided at a side of the bearing facing away from an interior of the pump housing ( 3 ).