Peristaltic Pump

Abstract

The invention relates to a peristaltic pump ( 1 ) for conveying a medium conducted in a hose, having a plurality of squeezing elements ( 3 ) which press the hose, so as to squeeze the hose, against a counter bearing ( 4 ) and thereby convey the medium in the hose onward in the conveying direction. To permit a simpler and faster insertion of a hose in a peristaltic pump of said type, it is provided according to the invention that the peristaltic pump has a threading device for inserting the hose between the squeezing elements ( 3 ) and the counter bearing ( 4 ).

1 . A peristaltic pump for conveying a medium carried in a hose, comprising several squeezing elements that press the hose against a counter bearing to squeeze the hose and convey the medium in the hose onward in a conveying direction, wherein the peristaltic pump includes a threading device for automatically inserting the hose between the squeezing elements and the counter bearing, the threading device including a screw spindle. 
     
     
         2 . The peristaltic pump according to  claim 1 , wherein the squeezing elements comprise squeezing rollers set in rotation by a driving motor via a gear mechanism. 
     
     
         3 . The peristaltic pump according to  claim 2 , wherein the squeezing rollers are supported on a carrier disk, in which an axis of each squeezing roller extends parallel to a drive shaft of driving motor. 
     
     
         4 . The peristaltic pump according to  claim 3 , wherein the carrier disk and the squeezing rollers rotatably supported therein are set in rotation by the driving motor via a gear mechanism during operation of the peristaltic pump. 
     
     
         5 . The peristaltic pump according to  claim 4 , wherein a guide roller is respectively arranged between two adjacent squeezing rollers on the carrier disk. 
     
     
         6 . The peristaltic pump according to  claim 3 , wherein the threading device is arranged outside the carrier disk. 
     
     
         7 . The peristaltic pump according to  claim 1 , wherein the screw spindle can be rotatively driven by a spindle driver. 
     
     
         8 . The peristaltic pump according to  claim 7 , wherein the spindle driver is coupled to the driving motor in such a way that the spindle driver sets the screw spindle in rotation as soon as the driving motor rotates the carrier disk. 
     
     
         9 . The peristaltic pump according to  claim 8 , wherein the screw spindle is arranged on a shaft, the shaft rotationally rigid and extending parallel to axis of the squeezing rollers. 
     
     
         10 . The peristaltic pump according to  claim 9 , wherein the shaft is rotatably supported in a housing part of the peristaltic pump. 
     
     
         11 . The peristaltic pump according to  claim 1 , wherein the threading device automatically inserts the hose between the squeezing elements and the counter bearing during operation of the peristaltic pump. 
     
     
         12 . The peristaltic pump according to  claim 1 , further comprising a fixing device for fixing the hose to a first location on an intake side of the peristaltic pump and to a second location on an output side of the peristaltic pump. 
     
     
         13 . The peristaltic pump according to  claim 1 , wherein the counter bearing is formed as a ring in a shape of a segment of a circle with a recess and the screw spindle is arranged in a region of the recess. 
     
     
         14 . The peristaltic pump according to  claim 2 , wherein the gear mechanism comprises a sun wheel and at least one planetary wheel connected to a respective squeezing roller in a rotationally rigid form and the carrier disk is set in rotation by the drive via an epicyclic gear including the sun wheel and at least one planetary wheel for each squeezing roller during operation of the peristaltic pump, wherein the at least one planetary wheel is coupled to an inner circumference of a housing that acts as a crown wheel. 
     
     
         15 . The peristaltic pump according to  claim 14 , wherein the sun wheel is connected to a driveshaft of the drive in a rotationally rigid form and torque transmitted from the driveshaft to the sun wheel is transmitted to the carrier disk by the sun wheel via inner circumference of the housing that acts as a crown wheel, wherein the carrier disk is set in rotation without an inserted hose during operation of the peristaltic pump.