Pipe fitting provided with two ball valves, one of which with concavity, that are activated in a sequence and with quick release coupling means subordinated to the closing of both valves

摘要

A fitting including two fitting parts connectable to respective pipes and provided with respective ball valves one of which with concavity, and a coupling device of the quick release type for the aforementioned fitting parts. It provides a functional interconnection that prevents the closing of the valve without concavity before the closing of the valve with concavity and the release of the coupling device before the closing of the valve without concavity. The functional interconnection includes a first control lever for the closing rotation of the valve with concavity, a second control lever for the closing rotation of the valve without concavity, that is hinged on the same axes of the first lever and has a rotation subordinated to the removal of a mechanical block caused by the first lever in an opening position. A first hydraulic cylinder controls the rotation of the first lever toward a closing position of the valve with concavity, and a second hydraulic cylinder controls the rotation of the second lever toward a closing position of the valve without concavity after the removal of the mechanical block and, subsequently, the release of the coupling device of the two fitting parts.