Peristaltic pump

Abstract

The invention relates to a peristaltic pump in which a case is formed by a dimensionally stable supporting frame ( 1 ) and by a tube reception device ( 2 ) formed thereon by clipping. A rotor ( 3 ) provided with three rotatable transport rollers ( 33 a , 33 b , 33 c ). Said tube reception device ( 2 ) is provided with a tube bearing body ( 25 ) which forms a bed for the tubes on the internal surface and comprises two legs ( 2 a , 2 b ) on the ends thereof. The tube flexible sections ( 43 ) are compresses by said transport rollers ( 33 a , 33 b , 33 c ) in order to ensure the peristaltic conveyance of a medium. The two legs ( 2 a , 2 b ) are elastically deformable in a radial direction in order to be elastically adaptable on the supporting frame ( 1 ). The bearing body ( 25 ) is substentially omega-shaped and provided with uniform input and output areas which ensure a medium continuous low-pulsed peristaltic conveyance. The inventive pump is constructed in such a way that it is small-sized, comprises few spare parts and is rapidly and easily mounted.

1 . Peristaltic pump, with a rotor ( 3 ) received in a housing, which is provided with at least one rotatably supported conveyor roller ( 33   a ,  33   b ,  33   c ), as well as with a tubing holder ( 2 ) for receiving of at least one flexible tubing section ( 43 ) that is squeezable by the conveyor roller ( 33   a ,  33   b ,  33   c ) for the peristaltically conveying a medium, characterized in that the housing is constituted by a dimensionally stable support frame (I) and by tubing holder ( 2 ), whereby the tubing holder ( 2 ) is designed at least partially elastically resilient such that it can be attached to the support frame ( 1 ) in the sense of a snap-on connection, and whereby the tubing holder ( 2 ) is fixed to the support frame ( 1 ) to be dimensionally stable after the attachment.  
   
   
       2 . Pump according to  claim 1 , characterized in that the tubing holder ( 2 ) is provided with a tubing bed body member ( 25 ), having a tubing bed at its inner side and two legs ( 2   a ,  2   b ) at its end, the latter ones being resiliently elastic in radial direction.  
   
   
       3 . Pump according to  claim 2 , characterized in that the tubing bed body member ( 25 ) at least partially and coaxially enlaces the rotor ( 3 ).  
   
   
       4 . Pump according to  claim 2 , characterized in that the two legs ( 2   a ,  2   b ) of the tubing bed body member ( 25 ) pass over from a concave shape to a convex shape in a smooth transition in the region of the particular leg end.  
   
   
       5 . Pump according to  claim 2 , characterized in that the tubing bed body member is designed essentially in the shape of an omega.  
   
   
       6 . Pump according to  claim 2 , characterized in that the support frame ( 1 ) is provided with cut-outs ( 13 ) and the legs ( 2   a ,  2   b ) of the tubing bed body member ( 25 ) at their ends with notch elements ( 22 ) for snapingly engaging the cutouts ( 13 ) of the support frame ( 1 ).  
   
   
       7 . Pump according to  claim 6 , characterized in that the notch elements ( 22 ) are located at the outside of the legs ( 2   a ,  2   b ), and that the support frame ( 1 ) is provided with a web ( 14 ) located above the cut-outs ( 13 ), at the side facing the tubing bed body member ( 25 ), for positively and/or non-positively supporting the particular leg ( 2   a ,  2   b ) of the tubing bed body member ( 25 ) at the outside.  
   
   
       8 . Pump according to  claim 2 , characterized in that the tubing bed body member ( 25 ) is designed such that its dimensional stability and fixation at the support frame ( 1 ) is supported, in addition to the elastically resilient inherent tenseness of the legs ( 2   a ,  2   b ), by the mutal force action of the squeezed tubing section and the squeezed tubing sections ( 43 ), respectively.  
   
   
       9 . Pump according to  claim 2   2 , characterized in that the tubing bed body member ( 25 ) is provided with a plurality of radially and/or axially extending reinforcing ribs ( 23 ,  24 ).  
   
   
       10 . Pump according to  claim 2 , characterized in that the inner side of the tubing bed body member ( 25 ) is provided with a multitude of groove-like recess ( 21 ) for receiving and guiding a plurality of tubing sections ( 43 ).  
   
   
       11 . Pump according to  claim 9 , characterized in that the particular conveyor roller ( 33   a ,  33   b ,  33   c ) is in the shape of a barrel and extends in axial directions over the groove-like recesses ( 21 ).  
   
   
       12 . Pump according to  claim 2 , characterized in that the particular tubing section is led into and out of the tubing bed body member ( 25 ) in substantially tangential direction.  
   
   
       13 . Pump according to  claim 2 , characterized in that the rotor ( 3 ) is provided with at least two conveyor rollers ( 33   a ,  33   b ,  33   c ), and that the tubing bed body member ( 25 ) coaxially enlaces the rotor ( 3 ) by an amount of 360° divided by the number of conveyor rollers.  
   
   
       14 . Pump according to  claim 1 , characterized in that the rotor ( 3 ) is provided with three conveyor rollers ( 33   a ,  33   b ,  33   c ), and the inlet portion ( 35 ) is offset around the axis of rotation of the rotor ( 3 ) with regard to the outlet portion ( 36 ) by 210° to 270°, preferably by approximately 240°.  
   
   
       15 . Pump according to  claim 3 , characterized in that the two legs ( 2   a ,  2   b ) of the tubing bed body member ( 25 ) pass over from a concave shape to a convex shape in a smooth transition in the region of the particular leg end.