Peristaltic rotation pump with exact, especially mechanically linear dosage

Abstract

The peristaltic rotation pump includes the pump segment extending along the working path, which is transversely grooved at the place of contact with the compressed pump segment, and is adjacent along all its length to an elevated circular supporting occlusal path, for rolling of pressure rollers. The working path includes a lead-in path, occlusal path and releasing path. Mechanical linearity of dosing is ensured by a circular occlusal path and the nearly circular releasing path, adjacent along all its length to the elevated supporting occlusal path for rolling of at least three pressure rollers. The angle length of the releasing path corresponding to the distance from the point of the beginning of releasing the pump segment to the point of complete release of the pump segment by the pressure roller is identical with that of the occlusal path.

1 . A peristaltic rotation pump with exact, especially mechanically linear dosing, comprises: 
 a pump segment placed on a working path, is said path being adjacent to an elevated circular supporting occlusal path and a rotor with pressure rollers, characteristic by the fact, said pump segment extending along the working path, both ends of said pump segment leaning against a supporting surface outside the working path, the working path being transversally grooved at the place of contact with the compressed pump segment and being adjacent within all its length to an elevated circular supporting occlusal path on which at least two pressure rollers roll, the rollers being freely sliding mounted with their outside surface in a hollow slide mounting of the pressure blocks placed flexibly in the hollow arms of at least double-arm rotor, the rotor being connected to a shaft of the step motor, while the supporting occlusal path is elevated in the direction to the rotor rotation center above the transversally grooved working path comprised of the lead-in path, occlusal path and releasing path.    
   
   
       2 . The peristaltic pump according to  claim 1  the wherein said pump segment forms angle α=90° with the radius of said working path at the point of diversion of the pump segment from the working path.  
   
   
       3 . The peristaltic pump according to  claim 1 , wherein the circular occlusal path and nearly circular releasing path are adjacent to an elevated circular supporting occlusal path along a whole length thereof, for rolling of at least three pressure rollers, and elevating the supporting occlusal path above the occlusal path by distance d<than twice the width of the pump segment wall, and at the point of absolute release of the pump segment, the supporting occlusal path being elevated above the releasing path by a distance less or equal to the external diameter of the pump segment, while the angle length of the occlusal path equals to the angle length of the releasing path corresponding to the distance from the point where the pressure roller starts releasing the pump segment to the point of complete release of the pump segment by the pressure roller, where the pressing force of the pressing roller to the pump segment is zero.  
   
   
       4 . The peristaltic pump according to  claim 1 , wherein the rotor comprising: 
 at least a two-arm hollow profiles an inside space of each arm of each hollow profile being filled with a pressure block, each profile being split by a longitudinal partition into two parts;    a spring placed in each part, the pressure blocks being secured in each arm of each hollow profile within an extent of stroke thereof by a pin located in a longitudinal groove of the pressure block and going through the first groove made in the arm of the hollow profile, each spring being leant inside the pressure block against the back wall of the slide mounting; and    a freely located a roller, each spring being pre-stressed at the other end against the body located in the hollow profile, the body being fixed by a bayonet close to the shaft of the step motor, the body being at least trilateral prism.    
   
   
       5 . The peristaltic pump according to  claim 1 , wherein the rotor has two arms and wherein the body is a tetralateral prism.  
   
   
       6 . The peristaltic pump according to  claim 1  wherein the rotor has three arms, wherein the body is a trilateral prism, the rounded corners thereof fitting into the second socket at the place of connection of the arms of the hollow profile, the front of the body being fitted with a cylindrical protrusions, in which a securing spring is placed, wherein the back of the body has a securing groove and an input groove for a securing pin placed on the shaft, the width of the securing groove at its most distant point from the cylindrical protrusion axis being less than the diameter of the securing pin, and wherein a pin of the pressure block fits into the first groove symmetrically placed at the front of the rotor and hollow profile, the pin locking at the same time into the appropriate second groove of the control element handling the pressure blocks when the rotor is inserted into the working path, into which the pump segment is pressed by expansion, the control element being connected by thread with the cylindrical protrusion.  
   
   
       7 . The peristaltic pump according to  claim 1 , wherein a minimum length of the occlusal path is defined by size of a central angle of the rotor rotation and is calculated from the formula 360°/number of arms of the rotor.  
   
   
       8 . The peristaltic pump according to  claim 1 , wherein said pressure block is comprised of guiding grooves for transversal guiding of the pump segment for the grooved occlusal path.  
   
   
       9 . The peristaltic pump according to  claim 1 , wherein the pressure roller is a roll from a rolling bearing which slides by all cylindrical surfaces thereof in sliding mounting of the pressure block.  
   
   
       10 . The peristaltic pump according to  claim 1 , wherein the sliding mounting is finished with wiper blades for removing possible dirt in both direction of rotation of the rotor, and wherein sockets are made on the head of the pressure block at the level of the blades.  
   
   
       11 . The peristaltic pump according to  claim 1 , wherein a length of stroke of the pressing block moves in the range of 1.1 to 2.0 multiple of the external diameter of the pump segment.  
   
   
       12 . The peristaltic pump according to  claim 1 , wherein the pressure roller is an electric conductor and when it gets to touching a speed contact or the position contact located on the supporting occlusal path where the lead-in path changes into the occlusal path and with common contact placed opposite to them on the edge of the occlusal path, the conductor is under electric current of very low voltage.  
   
   
       13 . The peristaltic pump according to  claim 1 , wherein the pressure roller is magnetized.