The invention relates to a butterfly valve, comprising a passageway, a valve seat enclosing the passageway, a rotatable valve shaft which has an axis of rotation spaced from a plane through the valve seat, a valve plate member fixed to the valve shaft and being located in the passageway, and seal en
The invention relates to a butterfly valve, comprising a passageway, a valve seat enclosing the passageway, a rotatable valve shaft which has an axis of rotation spaced from a plane through the valve seat, a valve plate member fixed to the valve shaft and being located in the passageway, and seal enclosing the valve plate member. The valve plate member has an open position and a closed position. At least in a plane through the seal in the open position, the width of the passageway adjacent to the valve seat as viewed from the valve seat in the direction of the axis of rotation is larger than the width of the passageway at the valve seat. Due to this configuration leakage via the seal in the closed position is avoided, because of minimal deformation of the seal in the open position. The butterfly valve has good resistance against irradiation and high-temperature necessary for enabling disinfection of the butterfly valve and a container to which it can be fixed and which is suitable for storage of sterilized products.
대표청구항▼
1. A container for containing fluid comprising; a butterfly valve comprising: a housing including a passageway defined by an internal surface of the housing, said passageway having a center line in axial direction thereof,a valve seat enclosing the passageway, the valve seat defining a plane,a valve
1. A container for containing fluid comprising; a butterfly valve comprising: a housing including a passageway defined by an internal surface of the housing, said passageway having a center line in axial direction thereof,a valve seat enclosing the passageway, the valve seat defining a plane,a valve shaft rotatably mounted to the housing and having an axis of rotation extending through the center line and spaced apart from the plane that extends through the valve seat,a valve plate member fixed to the valve shaft and being located in the passageway,a seal enclosing the valve plate member,said valve plate member having an open position and a closed position, in which the seal is in engagement with the valve seat so as to close the passageway, whereinat least in a plane through the seal in the open position, the width of the passageway adjacent to the valve seat as viewed from the valve seat in the direction of the axis of rotation is larger than the width of the passageway at the valve seat,a bag secured to the housing of the butterfly valve at a location thereof spaced from an end of the housing which protrudes in the bag,wherein the housing and bag are each made of plastic suitable for disinfecting by irradiation and high temperature with the bag secured to the end of the housing; andwherein the housing of the butterfly valve comprises a flange located on an external surface portion thereof, spaced apart from the valve seat in a direction opposite the direction of the axis of rotation, the bag further including a sleeve having a flange sealingly secured to an inner surface of the bag, so that the sleeve protrudes into the bag, with the housing extending into and being sealingly coupled within the sleeve, so that the bag is sandwiched between the flange mounted to the inner surface of the bag to which the bag is sealingly coupled and the flange of the housing of the butterfly valve along which the bag is abuttingly positioned, wherein the flange of the housing of the butterfly valve is larger than the flange of the sleeve, the container further comprising a box wherein the butterfly valve is mounted to an opening in the box with the flange of the housing of the butterfly valve being positioned within the box with at least a portion of the housing extending outside of the box. 2. The container according to claim 1, wherein the cross-sectional area of the passageway has a circumferential edge, which circumferential edge adjacent to the valve seat as viewed from the valve seat in the direction of the axis of rotation of the valve shaft extends beyond the circumferential edge at the valve seat in radial direction thereof. 3. The container according to claim 1, wherein the cross-sectional area of the passageway beyond the valve seat as viewed from the valve seat in the direction of the axis of rotation of the valve shaft gradually increases. 4. The container according to claim 1, wherein the passageway has a circular cross-sectional area. 5. The container according to claim 1, wherein the cross-sectional area of the passageway at least at the valve seat decreases in axial direction of the passageway. 6. The container according to claim 5, wherein the cross-sectional area of the passageway decreases up to an axial location of the passageway adjacent to an end portion of the valve plate member in its closed position, which end portion is located on the valve plate member in a direction as viewed from the axis of rotation to the seal. 7. The container according to claim 1, wherein the passageway comprises an inlet at one side and an outlet at an opposite side of the valve plate member, and the valve plate member is provided with reinforcement ribs located at a side of the valve plate member facing the outlet. 8. The container according to claim 7, wherein the reinforcement ribs are located next to the valve shaft as viewed from the plane through the seal in a direction perpendicular thereto. 9. The container according to claim 1, wherein the butterfly valve comprises a stop mechanism for stopping the valve plate member with respect to the housing when it is rotated from its open position to its closed position. 10. The container according to claim 9, wherein the stop mechanism comprises a projection mounted to the valve plate member which projects beyond the circumference of the valve plate member in a radial direction of the plane through the seal substantially perpendicular to the axis of rotation. 11. The container according to claim 1, wherein the housing is made of polycarbonate. 12. The container according to claim 1, wherein the valve plate member is made of polyamide, and the valve shaft is made of fibre-reinforced polyamide. 13. The container according to claim 1, wherein the valve plate member and/or the valve shaft are made of polycarbonate. 14. The container according to claim 1 and further comprising a box, wherein the butterfly valve and the box are mounted to each other with the bag disposed in the box such that the bag is filled and/or emptied with liquid material by opening the butterfly valve. 15. The container according to claim 14, wherein the bag is configured such that it folds when it is emptied. 16. The container according to claim 1, wherein the housing of the butterfly valve comprises a flange located on an external surface portion thereof, and the external surface portion is fixed to a sleeve which is mounted to a box in a hole of the box wherein the flange faces an external wall of the box. 17. The container according to claim 16, wherein the sleeve includes a flange opposite to the flange of the housing, said flange of the housing having a circumferential edge which extends at least partly beyond a circumferential edge of the flange of the sleeve as viewed from the center line. 18. The container of claim 1 wherein the bag is secured to the end of the housing with a heat weld between the plastic material of the bag and the plastic material of the housing. 19. The container of claim 18 wherein the housing includes a plastic sleeve at the end of the housing forming an outer surface to which the bag is secured, the sleeve having the heat weld with the bag. 20. The container of claim 19 wherein a portion of the housing having an internal surface at the end has a corresponding outer surface about the center line at the end that is secured to the sleeve with a press fit connection.
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이 특허에 인용된 특허 (11)
Podd Stephen D. (1321 Sherbrooke St. West ; Apt. E1 Montreal ; Quebec CAX H3G 1J4 ) Podd Victor I. (2582 NW. 59th St. Boca Raton FL 33496), Apparatus and method for rapid installation of container liner and access ports.
Hartwall Peter,SEX, Bag shaped inner layer in the form of a so-called liner intended for use together with a carrying outer structure when transporting and storing bulk goods.
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