Embodiments of the invention provide a normally open valve, a normally closed valve, and a combination valve. The valves include a valve body with an inlet coupled to a fluid supply line, an outlet providing a service flow of fluid, a vent venting to atmosphere, a lower piston, a lower diaphragm, an
Embodiments of the invention provide a normally open valve, a normally closed valve, and a combination valve. The valves include a valve body with an inlet coupled to a fluid supply line, an outlet providing a service flow of fluid, a vent venting to atmosphere, a lower piston, a lower diaphragm, and a mechanical valve actuator. The mechanical valve actuator includes an upper piston, an upper diaphragm, a pilot piston with a bore and a plunger, and a spring. The spring is positioned either inside the pilot piston for the normally open valve or inside the upper piston for the normally closed valve. The valves are actuated based on a control fluid entering a system pressure port and exceeding a pressure set point in order to either open or close the valve.
대표청구항▼
1. A valve that is normally open, the valve adapted to be coupled to a fluid supply line, the valve providing a service flow of fluid, the valve receiving a control fluid, the valve in fluid communication with atmosphere, the valve comprising: a valve body including an inlet coupled to the fluid sup
1. A valve that is normally open, the valve adapted to be coupled to a fluid supply line, the valve providing a service flow of fluid, the valve receiving a control fluid, the valve in fluid communication with atmosphere, the valve comprising: a valve body including an inlet coupled to the fluid supply line and an outlet providing the service flow of fluid;a restriction wall positioned between the inlet and the outlet, the restriction wall defining a passageway for the service flow of fluid; anda chamber within the valve body within which is: a sealing mechanism configured to selectively block the passageway for the service flow of fluid;an upper diaphragm positioned at a second end of the chamber opposite the first end of the chamber; anda mechanical valve actuator having an inner bore and configured to translate separately from the sealing mechanism and positioned between the sealing mechanism and the upper diaphragm,wherein a spring is positioned within the inner bore of the mechanical valve actuator and is configured to engage the mechanical valve actuator in order to open the valve. 2. The valve of claim 1, wherein the sealing mechanism includes a lower piston and a lower diaphragm, and the valve body includes a bleed opening extending through the lower piston and the lower diaphragm and configured to vent fluid flow at the inlet, the bleed opening venting excess service flow to a lower chamber when the valve is closed. 3. The valve of claim 1, wherein the valve body includes an upper chamber, a middle chamber, and a lower chamber, the upper chamber positioned between the upper diaphragm and the system pressure port, and the lower chamber positioned between the middle chamber and the sealing mechanism. 4. The valve of claim 3, wherein the control fluid provided to the valve through the system pressure port is confined to the upper chamber and maintained separate from the service flow of fluid between the inlet and the outlet. 5. The valve of claim 1, wherein the mechanical valve actuator includes a plunger and the sealing mechanism includes a pilot, such that the plunger is configured to cover the pilot to prohibit backflow of the service flow of fluid when the valve is closed. 6. The valve of claim 1, wherein the pilot includes a first passageway with a first diameter extending through the lower piston, and a second passageway with a second diameter extending through the lower diaphragm, the first diameter being smaller than the second diameter. 7. The valve of claim 1, further comprising a vent venting to the atmosphere, wherein at least one of the inlet, the outlet, the vent, and the system pressure port include a passageway with a plurality of radially concentric diameters. 8. The valve of claim 1, wherein the pressure set point is determined by a strength parameter of the spring. 9. The valve of claim 1, wherein the pressure set point is 69 kPa. 10. The valve of claim 1, wherein the control fluid enters the system pressure port to actuate the valve without the use of electrical power. 11. A valve that is normally closed, the valve adapted to be coupled to a fluid supply line, the valve providing a service flow of fluid, the valve receiving a control fluid, the valve in fluid communication with atmosphere, the valve comprising: a valve body including an inlet coupled to the fluid supply line;an outlet providing the service flow of fluid;a restriction wall positioned between the inlet and the outlet, the restriction wall defining a passageway for the service flow of fluid; anda chamber within the valve body and including: a sealing mechanism designed to selectively close the passageway for the service flow, positioned in a first end of the chamber;an upper diaphragm positioned in a second end of the chamber opposite the first end of the chamber;a mechanical valve actuator having an inner bore and configured to translate within the valve body separately from the sealing mechanism and positioned between the sealing mechanism and the upper diaphragm; anda spring disposed within the inner bore of the mechanical valve actuator that engages the mechanical valve actuator in order to close the valve. 12. The valve of claim 11, wherein the mechanical valve actuator includes a plunger and the sealing mechanism includes a pilot hole, such that the plunger is configured to cover the pilot hole and prohibit backflow of the service flow of fluid when the valve is closed. 13. The valve of claim 11, wherein the spring is a compression spring. 14. The valve of claim 11, wherein the control fluid enters the system pressure port to actuate the valve without the use of electrical power. 15. A valve adapted to be coupled to a fluid supply line, the valve providing a service flow of fluid, the valve receiving a control fluid, the valve in fluid communication with atmosphere, the valve comprising: a valve body including an inlet coupled to the fluid supply line;an outlet providing the service flow of fluid;a restriction wall positioned between the inlet and the outlet, the restriction wall defining a passageway for the service flow of fluid; anda chamber within the valve body and including therein: a sealing mechanism designed to selectively close the passageway for the service flow and positioned in a first end of the chamber;an upper diaphragm positioned in a second end of the chamber opposite the first end of the chamber;a mechanical valve actuator configured to translate within the valve body separately from the sealing mechanism; anda spring engaging the mechanical valve actuator in order to close the valve, the spring being disposed within an inner bore of the mechanical valve actuator and coaxially disposed therewith. 16. The valve of claim 15, wherein the sealing mechanism includes a lower piston and a lower diaphragm, and the valve body includes a bleed opening extending through the lower piston and the lower diaphragm and configured to vent fluid flow at the inlet, the bleed opening venting excess service flow to a lower chamber when the valve is closed. 17. The valve of claim 15, wherein the valve body includes an upper chamber, a middle chamber, and a lower chamber, the upper chamber positioned between the upper diaphragm and a system pressure port that is coupled to the valve body, and the lower chamber positioned between the middle chamber and the sealing mechanism. 18. The valve of claim 17, wherein the control fluid provided to the valve through the system pressure port is confined to the upper chamber and maintained separate from the service flow of fluid between the inlet and the outlet. 19. The valve of claim 15, wherein the mechanical valve actuator includes a plunger and the sealing mechanism includes a pilot, such that the plunger is configured to cover the pilot to prohibit backflow of the service flow of fluid when the valve is closed. 20. The valve of claim 15, wherein the sealing mechanism includes a lower piston, a lower diaphragm, and a pilot extending through the lower piston and the lower diaphragm, the pilot including a first passageway with a first diameter extending through the lower piston, and a second passageway with a second diameter extending through the lower diaphragm, the first diameter being smaller than the second diameter.
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이 특허에 인용된 특허 (18)
Assa, Igal; Ben-Horin, Ra'anan, 3-Way control valve.
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