ES262999U - Device detector of the pressure and piloter of a security valve. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Pressure detector device and pilot valve of a safety valve, of the type comprising: a flap mounted on the capacity to be protected and governed by a set consisting of a cylinder inside which is mounted with sliding a plunger whose shank is solidary of the clapper; the cylinder communicates with the detection and pilot device, which is, in turn, in communication, direct or through a relay tank, with the capacity to be protected; a first enclosure joined, on the one hand, to the capacity to be protected and, on the other hand, to the cylinder that governs the valve itself; this enclosure is provided with a flap that can isolate it from said cylinder; and a second enclosure that can be put in communication with the atmosphere by the operation of a flap and that ends in the conduit that communicates the first enclosure with the control cylinder of the valve., and in which the flaps of both enclosures are associated with respective driving means, governed in turn by the fluid of the capacity to be protected and operated in such a way that, below a certain predetermined pressure, the first enclosure communicates the capacity to be protected and the control cylinder of the valve, without the second enclosure communicating with the atmosphere, and that, above a certain predetermined pressure, the first enclosure isolates from the valve control cylinder the capacity to be protected, while the second enclosure the enclosure then allows the communication of said cylinder with the atmosphere, characterized in that the actuating means of both flaps are constituted by a single cylinder, the chamber communicates with the capacity to be protected and within which a piston moves whose piston rod is capable of being supported, when a displacement of the piston inside the cylinder occurs, overcoming the resistance of elastic means and, as a result of the pressure existing within the capacity, on a coaxial rod whose displacement is also carried out by overcoming the resistance of elastic means and on which a suitable organ is mounted to act, depending on the position of the rod, on the shanks of the two flaps, associated to the enclosure that joins the capacity that is to be protected to the control cylinder and, respectively, to the enclosure able to put in communication with the atmosphere the control cylinder. (Machine-translation by Google Translate, not legally binding)