Shock absorbing means for flow control devices

Details Shock absorbing means for flow control devices Shock absorbing means for flow control devices

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 25/00 (2006.01) F16K 17/04 (2006.01) F16K 31/122 (2006.01)

Patent

CA 2088508

A pressure relief valve (14, 14A) has a reciprocable valve member (34, 34A) for seating on an annular seat face (66, 66A) of a nozzle assembly (38, 38A). The nozzle assembly (38, 38A) has an inner seat ring (40, 40A), a radially outer anchor ring (42, 42A), and a flexible connecting member (44, 44A) extending in a generally radial direction between the outer peripheral surface (64) of the seat ring (40, 40A) and the inner peripheral surface of the anchor ring (42, 42A). Upon seating or reseating of the valve member (34, 34A), seal face (36, 36A) contacts the seat face (66, 66A) of seat ring (40, 40A) and flexible connecting member (44, 44A) flexes upon relative movement of the seat ring (40, 40A) after initial contact of the valve member (34, 34A) against the seat ring (40, 40A) thereby to act as a shock absorber for absorbing impact forces.

Cette invention concerne une soupape de sûreté (14, 14A) comportant un obturateur à mouvement alternatif (34, 34A) destiné à prendre appui sur la portée annulaire (66, 66A) d'un ajutage (38, 38A). L'ajutage (38, 38A) comporte une bague-siège intérieure (40, 40A), une bague extérieure d'ancrage de diamètre plus grand que la bague-siège et un élément souple de raccordement (44, 44A) faisant le pont dans une direction généralement radiale entre la périphérie extérieure (64) de la bague-siège (40, 40A) et la périphérie intérieure de la bague d'ancrage (42, 42A). Lorsque l'obturateur (34, 34A) ou se referme, sa portée (36, 36A) prend appui sur la portée annulaire (66, 66A) de la bague-siège (40, 40A) et l'élément de raccordement souple (44, 44A) se plie en fonction de déplacement de la bague-siège (40, 40A) sous l'impact de l'obturateur (34, 34A) afin d'absorber le choc.

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