One aspect of the invention provides a diaphragm valve having a plurality of sealing members disposed on the diaphragm, the plurality of sealing member and the seat define two intermediate chambers, coupled to at least one and potentially more, alarm port, to alert of leakage of fluid from the inlet
One aspect of the invention provides a diaphragm valve having a plurality of sealing members disposed on the diaphragm, the plurality of sealing member and the seat define two intermediate chambers, coupled to at least one and potentially more, alarm port, to alert of leakage of fluid from the inlet side and/or the outlet side. A second aspect of the invention provides at least one angled lip disposed to improve the seal quality of any diaphragm valve. The angled lip enjoys increased sealing responsive to increased pressure of the fluid it seals against. The angled lip may be disposed on the inlet side, he outlet side, or both. In certain embodiments the lip is utilized in a diaphragm having two sealing member forming a single intermediate chamber therebetween when the valve is in the closed condition.
대표청구항▼
1. A fluid control valve comprising: a valve body having a first inner surface at last partially defining a chamber the chamber comprising a valve inlet and a valve outlet in communication with the chamberan elongated seat member disposed between the inlet and the outlet, the seat member having at l
1. A fluid control valve comprising: a valve body having a first inner surface at last partially defining a chamber the chamber comprising a valve inlet and a valve outlet in communication with the chamberan elongated seat member disposed between the inlet and the outlet, the seat member having at least a first opening disposed therein, the opening being in communication with at least one alarm port; and,a diaphragm member disposed within the chamber for controlling communication between the valve inlet and the valve outlet, the diaphragm member having an upper surface and a lower surface, the lower surface comprising at least partially pliable first, second and third spaced apart elongated sealing members, the first and second sealing members defining a first channel therebetween, and the second and third sealing members defining a second channel therebetween, the diaphragm member being movable at least between a first state permitting fluid communication between the inlet and the outlet and a second state wherein the elongated members engage the seat member such that the first channel and at least a portion of the seat define a first intermediate chamber, and the second channel with at least a portion of the seat define a second intermediate chamber. 2. The control valve as claimed in claim 1 wherein the first intermediate chamber or the second intermediate chamber, or a combination thereof are in communication with the first opening. 3. The control valve of claim 1 wherein the seat further having a second opening disposed therein, wherein the first opening is in communication with the first intermediate chamber, and the second opening is in communication with the second intermediate chamber. 4. The control valve as claimed in claim 3, wherein the second opening is in communication with a second alarm port. 5. The control valve as claimed in claim 4, wherein the first alarm port is disposed on a first side of the valve and the second alarm port is disposed on the opposite side of the valve. 6. The control valve as claimed in claim 3 wherein the second opening is in communication with the at least one alarm port. 7. The control valve as claimed in claim 1 wherein the second sealing member comprises material which is more rigid than the material of at least one of the first and third sealing members. 8. The control valve as claimed in claim 1, further comprising a compression spring disposed in the diaphragm chamber, and extending between a spring support and the diaphragm, the spring urging the diaphragm into the second state. 9. The control valve as claimed in claim 1, wherein at least one of the first and third member comprises a protrusion extending toward the seat, the protrusion having an angled lip disposed at the distal end thereof, the angled lip being angled away from the second sealing member. 10. A fluid control valve comprising: a valve body having a first inner surface defining a chamber the chamber comprising a valve inlet and a valve outlet in communication with the chamber;an elongated seat member disposed between the inlet and the outlet; and,a diaphragm member disposed within the chamber for controlling fluid communication between the valve inlet and the valve outlet, the diaphragm member having an upper surface and a lower surface, the lower surface comprising at least a first sealing member, the diaphragm member being movable between at least a first state permitting fluid communication between the inlet and the outlet and a second state wherein the first elongated sealing member engages the seat member;wherein the at least first sealing member having an inlet side and an outlet side, the sealing member comprises a protrusion coupled to the lower surface of the diaphragm and extending away therefrom towards a distal end; and,a first lip disposed at or about the distal end and forming an edge or a curvature with the protrusion, the lip being angled relative to the protrusion, towards the inlet if it is disposed on the inlet side of the sealing member, or towards the outlet if it is disposed on the outlet side of the sealing member. 11. A valve as claimed in claim 10, wherein the first lip extends in the direction of the inlet. 12. A valve as claimed in claim 10, wherein the first lip extends in the direction of the outlet. 13. A valve as claimed in claim 10, further comprising a second lip disposed on the side of the sealing member opposite the side of the first lip, and angled in an opposite direction from the first lip relative to the Y-Z plane. 14. A valve as claimed in claim 10, further comprising a second sealing member disposed on the lower surface of the diaphragm and extending substantially parallel to the first sealing member the first and the second sealing members in combination with the seat member, at least partially define an intermediate chamber. 15. A valve as claimed in claim 14 wherein the first sealing member is an inlet sealing member, and wherein the first lip is disposed on the inlet side of the first sealing member, and extending therefrom in the direction of the inlet. 16. A valve as claimed in claim 14 wherein the first sealing member is outlet sealing member, and wherein the first lip is disposed on the outlet side of the first sealing member, and extending therefrom in the direction of the outlet. 17. A valve as claimed in claim 14 wherein the first sealing member an inlet sealing member and the second sealing member is an outlet sealing member; the first lip being disposed on the inlet side of the first sealing member and angled therefrom in the direction of the inlet;further comprising a second lip disposed on the side of the second sealing member, and angled therefrom in the direction of the outlet. 18. A fluid control alarm valve comprising: a valve body having a first inner surface at least partially defining a chamber, the chamber having an inlet and an outlet in fluid communication with the chamber;a seat having disposed between the inlet and the outlet;a first, second, and third sealing members are disposed to impede fluid passage from the inlet to the outlet;a first intermediate chamber is defined at least partially by the first and second sealing members, and a second intermediate chamber is defined between at least the second and third sealing members;a first opening is disposed in the first intermediate chamber and a second opening being disposed in the second intermediate chamber;wherein the first opening is in fluid communications with a first alarm activator, and the second opening is in fluid communication with a second alarm activator. 19. A valve as claimed in claim 10, wherein the lip is integral to the protrusion and/or to the diaphragm. 20. A valve as claimed in claim 10 wherein the protrusion and the lip are integral to the diaphragm. 21. A valve as claimed in claim 13 wherein the second lip is integral to the protrusion and/or to the diaphragm.
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이 특허에 인용된 특허 (7)
Lodolo, Alberto, Diaphargm valve and open close element for said valve.
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