Gas cylinder valve with non-perforated diaphragms

Details Gas cylinder valve with non-perforated diaphragms Gas cylinder valve with non-perforated diaphragms

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 41/12 (2006.01) F16K 1/30 (2006.01)

Patent

CA 2197790

A gas cylinder valve with (1) minimum wetted area has a one-piece valving assembly (53) comprising a valve member (19), a non-perforated diaphragm member (37) and a valve stem (51), the latter including a threaded stud (59) and a stem shaft (61) threaded on to the stud (59). The threaded stud (59), diaphragm member (37) and valve member (19) are fused together by a YAG laser weld (69) applied through a central, blind bore (29) in the valve member (19). Another through weld (71) is applied around the peripheral edge (73) of the threaded stud (59). A rim (67) on the stem shaft (61) clamps the diaphragm (37) outside the peripheral weld (71) through a pair of washers (75, 77) which absorb the torsional load. A helical compression spring (91) bears on a valve stem shaft shoulder (95) outside the wetted area to bias the valve open. A resilient bushing (79) supported by a metal cup (43) backs up the diaphragm member (37).

Robinet-vanne de bouteille de gaz présentant une surface mouillée qui est minimale (1). Ce robinet-vanne comprend un corps de vanne (53) en une seule pièce comprenant une soupape (19), un diaphragme non perforé (37) et une tige de soupape (51), cette dernière comprenant un boulon fileté (59) et un axe de tige (61) vissé sur le boulon (59). Le boulon fileté (59), le diaphragme (37) et la soupape (19) sont soudés ensemble par une soudure au laser au grenat d'yttrium et d'aluminium (69) pratiquée à travers un alésage central (29) non débouchant, ménagé dans la soupape (19). Une autre soudure traversante (71) est réalisée selon la périphérie (73) du boulon fileté (59). Un cerclage (67) sur une tige de soupape (61) fixe le diaphragme (37) en dehors de la soudure périphérique (71) par l'intermédiaire de deux rondelles (75, 77) qui absorbent la charge de torsion. Un ressort hélicoïdal de compression (91) appuie sur l'épaulement de l'axe de la tige de soupape (95), en dehors de la surface mouillée, pour forcer la soupape en position ouverte. Une bague élastique (79) reposant sur une cuvette en métal (43) renforce le diaphragme (37).

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