F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 17/04 (2006.01) F16K 15/06 (2006.01)
Patent
CA 2317742
A pressure relief valve assembly (10) for releasing fluid through a vent (V) in a railway tank car, tank trucks and similar vessels. A valve disk (16) is normally biased in a closed position by a plurality of constant-force springs (30) of laminated steel tapes (30a) on drums (32) supported on upright angle brackets (36) symmetrically arranged around a valve seat (14). The pressure at which the valve opens is determined by a preselection of the number of springs (30), laminated tapes (30a) per spring (30), and the restoring force of each tape (30a).
L'invention concerne un ensemble soupape de surpression (10) destinée à libérer du fluide par l'intermédiaire d'un évent (V) ménagé sur un wagon-citerne, un camion-citerne, ou toute cuve analogue. Un plateau de soupape (16) est normalement placé en position fermée par les ressorts (30) à force constante de rubans d'acier feuilletés (30a), situés sur des tambours (32) qui reposent sur des supports angulaires verticaux (36), disposés de manière symétrique autour d'un siège (14) de soupape. On calcule la pression sous laquelle la soupape s'ouvre en choisissant au préalable la quantité de ressorts (30), de rubans laminés (30a) par ressort (30), et en réglant la force de rappel de chacun de ces rubans (30a).
Kelso Technologies Inc.
Ridout & Maybee Llp
LandOfFree
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