Ring plate valve for piston compressors

Abstract

A ring plate valve for piston compressors includes several individual plastic ring plates ( 3 ) as closing organs, which are concentrically arranged in relation to each other between valve seat ( 1 ) and catcher ( 2 ). The diameter of individual steel spiral springs, that are distributed on the circumference for the purpose of supplying the ring plates ( 3 ) with spring force, is essentially equally large as the width of the ring plates ( 3 ), thereby allowing for the realization of a small spring length. On the side of the catcher, the spiral springs ( 4 ) are supported and guided inside individual spring cups ( 7 ), preferably of abrasion-resistant plastic.

1 . Self-acting ring plate valve for piston compressors comprised of several individual plastic ring plates ( 3 ) as closing organs, which are concentrically arranged in relation to each other between valve seat ( 1 ) and catcher ( 2 ) and which are loaded from the direction of the circumferential fixed links ( 6 ) of the catcher ( 2 ) vis-à-vis the valve seat ( 1 ) by way of individual steel spiral springs ( 4 ) wherein the diameter of the spiral springs ( 4 ) is essentially equally large as, or minimally smaller than the width of the ring plates ( 3 ) at the contact location of the spiral springs ( 4 ), and wherein the spiral springs ( 4 ) are supported and guided on the side of the catcher ( 2 ) in individual spring cups ( 7 ) that rest in blind-hole-type recesses ( 5 ) of the circumferential fixed links ( 6 ) of the catcher ( 2 ), and, when the ring plates ( 3 ) are in the open state, the spring cups ( 7 ) close off to the outside the space that is occupied by the spiral springs ( 4 ), at least for the most part.  
     
     
         2 . Ring plate valve as in claimed in  claim 1 , wherein the spring cups are comprised of thermoplastic or duroplastic materials, preferably polyamides, polyphenyl sulfides, polyetherketones, phenolic resins or epoxy resins, containing filler and/or reinforcement materials, preferably carbon fibers, graphite, aramide or fluorocarbon polymers in order to increase the abrasion resistance.  
     
     
         3 . Ring plate valve as claimed in  claim 1 , wherein the spring cups ( 7 ) have a ventilation opening ( 9 ) arranged on their floor ( 8 ) that ventilates the space occupied by the spiral springs ( 4 ) by way of at least one opening ( 10 ) which is envisioned on the floor of the recesses ( 5 ) of the circumferential fixed links ( 6 ) of the catcher ( 2 ), and said opening leads to the outside and/or inside circumference of the circumferential fixed links ( 6 ).  
     
     
         4 . Ring plate valve as claimed in  claim 3 , wherein the recesses ( 5 ) in the circumferential fixed links ( 6 ) of the catcher ( 2 ) feature a graduated area in the floor area for forming the openings ( 10 ) that lead to the outside and inside circumferences of the circumferential fixed links ( 6 ) of the catcher ( 2 ) and whose diameter is even larger at that location than the width of the circumferential fixed links ( 6 ).  
     
     
         5 . Ring plate valve as claimed in  claim 1 , wherein the floor ( 8 ) of the spring cups ( 7 ) is realized as conical, at least in the area where the spiral springs ( 4 ) are supported, in order to achieve the self-acting centering of the spiral springs ( 4 ).