Piston pump with quick exhaust slide valves

Abstract

A pneumatically driven piston pump and its quick exhaust slide valves, which allows air to be evacuated from the piston pump's piston chambers directly into the environment without having to pass through the main distributor valve, in such a way that it does not cause a drop in temperature due to the expansion of the compressed air which freezes the humidity of the air itself, clogging the compressed air circulation ducts and causing the pump to shut down or stall. Such an air-operated piston pump with quick exhaust valves allows the passage of air with low restriction, which increases the efficiency of the piston pump and decreases its compressed air consumption compared to the same air motor without quick exhaust valves.

1 - 9 . (canceled) 
     
     
         10 . A piston pump with quick exhaust slide valves comprising:
 a single piston in two air piston chambers with reciprocating motion separating the two piston air chambers and two quick exhaust valves, one of the quick exhaust valves for each air piston chamber, which prevent, by means of a sliding mechanism of the quick exhaust valves, the evacuation of the air from the air piston chambers through a main air distribution valve, preventing the main distribution valve from freezing and allowing the air to be discharged directly into the environment from the piston pump.   
     
     
         11 . The piston pump with quick exhaust slide valves according to  claim 10  wherein the piston pump having a main exhaust system which comprises:
 at least one compressed air inlet connection; 
 at least one of the main air distribution valve; 
 at least two piston limit switch sensors; 
 the two air piston chambers; 
 at least two of the quick exhaust slide valves; 
 at least one pneumatic piston pump silencing system; and 
 an air chamber piston. 
 
     
     
         12 . The piston pump with quick exhaust slide valves according to  claim 10  wherein the quick exhaust slide valves have a guided slide or moving part which allows air to enter the air piston chamber and when the stroke is reversed to be exhausted directly from the air piston chamber into the environment via the main exhaust system of the piston pump. 
     
     
         13 . The piston pump with quick exhaust slide valves according to  claim 10  wherein the quick exhaust valves comprise a prismatic slide system with a moving part, a stationary sleeve and housing, so that the moving part has linear travel guided by the stationary sleeve and housing. 
     
     
         14 . The piston pump with quick exhaust slide valves according to  claim 13  wherein each of the quick exhaust slide valves has three ports, one of the ports is always open, and the other two of the ports are closed by a moving part, one of the three ports being in an operating position of a moving part. 
     
     
         15 . The piston pump with quick exhaust slide valves according to  claim 14  wherein the moving part is displaced by the dynamic pressure of the compressed air, depending on whether it arrives at one port or the other port, the moving part comprises:
 a compressed air inlet port; 
 an air outlet port to the atmosphere; 
 an air motor port; 
 the moving part of quick exhaust slide valve; 
 the stationary sleeve of quick exhaust slide valve; and 
 quick exhaust slide valve body/housing. 
 
     
     
         16 . The piston pump with quick exhaust slide valves according to  claim 10  wherein the quick exhaust valves are independent accessories externally coupled to the piston pump, and the independent accessories are used in any pneumatic system as independent quick exhaust valves. 
     
     
         17 . The piston pump with quick exhaust slide valves according to  claim 10 , wherein the quick exhaust valves electronically operated. 
     
     
         18 . The piston pump with quick exhaust slide valves according to  claim 13 , wherein the moving part of the quick exhaust valves has a part of flexible and elastic material which deforms elastically when the quick exhaust valve receives air under pressure from a convex side of the part, contracting and allowing the passage of pressurised air and, when the quick exhaust valve receives the pressurised air from a concave side of the part, the part elastically deforms and expands to fill an entire cylindrical cross-section of a housing of the quick exhaust valve. 
     
     
         19 . The piston pump with quick exhaust slide valves according to  claim 18  wherein the part of flexible and elastic material exerts thrust force to move the moving part until the moving part butts against the housing sealing an air inlet port of the quick exhaust valve. 
     
     
         20 . The piston pump with quick exhaust sliding valves according to  claim 19  wherein the moving part has a part of flexible and elastic material located in the area that contacts the stationary sleeve in one of the operating positions, sealing an air outlet port of the valve. 
     
     
         21 . The piston pump with quick exhaust slide valves according to  claim 20  wherein the moving part has the two of the parts of flexible material assembled by means of fittings or bolted to a structure of a rigid material, the rigid material being metallic or plastic. 
     
     
         22 . The piston pump with quick exhaust slide valves according to  claim 12  wherein the moving part is entirely made of a single piece of flexible and elastic material. 
     
     
         22 . The piston pump with quick exhaust slide valves according to  claim 12 , wherein the quick exhaust slide valves are integrated in a pneumatic actuator on which the quick exhaust slide valves are to operate, wherein the pneumatic actuator has housings into which the moving part and stationary parts of the quick exhaust valves are inserted. 
     
     
         23 . The piston pump with quick exhaust slide valves according to  claim 12 , wherein the design of the quick exhaust slide valves prevents the possibility of misalignment of the moving part, ensuring the guidance of said moving part, which makes it possible to lengthen travel of the moving part to increase the section of the compressed air passage, reducing load loss and improving the performance of the quick exhaust slide valve with respect to designs of the same size, which have a short travel so that the moving part, without guidance, does not become misaligned and cause leaks and/or malfunctioning.