Gate valve sleeve

Details Gate valve sleeve Gate valve sleeve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 3/00 (2006.01) F16K 3/02 (2006.01)

Patent

CA 2078021

A sealing sleeve for a gate valve is disclosed which is designed to respond to movements of the gate of the valve in a particular manner. The seal undergoes an axial compressive type movement as the gate is moved between opposed sealing sleeves and this causes a predetermined radially inward buckling of an intermediate wall section of the sealing sleeve. This predetermined buckling creates a spring bias in the sleeve, urging the sleeve to return to the original, less stressed condition. Preferably, the sleeve is of a composite structure and a particular component of the intermediate wall section creates this spring bias. This structure has improved operating characteristics and accommodates a wider range of resilient materials to be used for the sealing sleeve.

Manchon d'étanchéité pour vanne conçu pour réagir de façon particulière aux mouvements de l'obturateur de la vanne. L'élément d'étanchéité a un mouvement du type compression axiale quand l'obturateur se déplace entre des manchons d'étanchéité opposés, ce qui cause une flexion prédéterminée d'une section de paroi intermédiaire du manchon d'étanchéité qui se fait radialement vers l'intérieur. Cette flexion prédéterminée crée un effet de ressort dans le manchon, ce qui le pousse à réintégrer son état original moins tendu. De préférence, le manchon est de structure composite et une composante particulière de la section de paroi intermédiaire crée cet effet de ressort. Ladite structure a des caractéristiques de comportement améliorées et permet l'utilisation d'une vaste gamme de matériaux élastiques pour le manchon d'étanchéité.

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