초록 ▼

This disclosure is related to a non-electronic pressure control system for a pressurized system that receives fluid from a fluid supply. The pressure control system includes a control module, an actuator and a flow control device. The control module monitors the pressure of fluid either upstream or

This disclosure is related to a non-electronic pressure control system for a pressurized system that receives fluid from a fluid supply. The pressure control system includes a control module, an actuator and a flow control device. The control module monitors the pressure of fluid either upstream or downstream of the flow control device. The control module can send a pneumatic signal to the actuator to open or close the flow control device responsive to the pressure monitored by the control module and the pressure required for the pressurized system.

대표청구항 ▼

1. A pressure control system for monitoring fluid pressure for a pressurized system, the pressure control system comprising: a fluid control device for affecting the pressure of fluid downstream from the fluid control device;an actuator for opening and closing the fluid control device; anda control

1. A pressure control system for monitoring fluid pressure for a pressurized system, the pressure control system comprising: a fluid control device for affecting the pressure of fluid downstream from the fluid control device;an actuator for opening and closing the fluid control device; anda control module for processing pneumatic signals from at least one predetermined pressure point upstream or downstream from the fluid control device, the control module sending signals to the actuator to open or close the fluid control device responsive to pneumatic signals, the control module comprising: a pressure sensor to determine pressures of the fluid from the at least one predetermined pressure point;an air switch to receive pneumatic signals from the pressure sensor responsive to the pressure of the fluid from the at least one predetermined pressure point;a charge valve to send a pneumatic signal to the actuator or exhaust fluid from the control module responsive to a pneumatic signal received from the air switch;a first regulator to control the pressure of fluid entering the control module from an instrument air pressure line and passing to the charge valve; anda second regulator to alter pressure of fluid from the pressure sensor to increase the air switches effectiveness at system pressures outside of an operational range of the air switch. 2. The pressure control system of claim 1 further comprising a fluid supply which provides a fluid source for the pressurized system, the fluid supply in fluid communication with the pressurized system via a fluid transportation conduit. 3. The pressure control system of claim 1 wherein the predetermined pressure point can be located upstream or downstream of the fluid control device. 4. The pressure control system of claim 1 wherein the predetermined pressure point can be located within the pressurized system. 5. The pressure control system of claim 1 wherein fluid is taken from the predetermined pressure point to the control module via a first pressure sensing line. 6. The pressure control system of claim 1 wherein the second regulator adds a predetermined amount of pressure to a low pressure fluid from the predetermined pressure point to enhance the air switches effectiveness. 7. The pressure control system of claim 1 wherein the second regulator reduces a high pressure fluid received via the predetermined pressure point a predetermined amount to a lower pressure to enable the air switch to handle the fluid without destroying the air switch. 8. The pressure control system of claim 1 wherein the control module further comprises a circuit enable to stabilize and optimize performance of the air switch. 9. The pressure control system of claim 1 wherein the control module opens or closes the fluid control device via the actuator when the pressure of the fluid from the predetermined pressure point is above or below a predetermined pressure range. 10. The pressure control system of claim 1 wherein the control module opens or closes the fluid control device via the actuator when the pressure of the fluid from the predetermined pressure point is above or below a predetermined pressure. 11. The pressure control system of claim 5 further comprising a second pressure sensing line providing a fluid under pressure from a second predetermined pressure point to the control module, the control module opening and closing the fluid control device responsive to a differential in pressure between the pressure of the fluid from the predetermined pressure point and the fluid from the second predetermined pressure point. 12. The pressure control system of claim 11 wherein the first predetermined pressure point is positioned upstream from the fluid control device and the second predetermined pressure point is positioned downstream of the fluid control device. 13. The pressure control system of claim 11 wherein the first predetermined pressure point is positioned upstream from the fluid control device and the second predetermined pressure point is positioned at a location within the pressurized system. 14. The pressure control system of claim 11 wherein the fluid from the second predetermined pressure point is fed to the pressure sensor of the control module in addition to the first predetermined pressure point. 15. The pressure control system of claim 14 wherein the pressure sensor provides a pneumatic signal to the air switch responsive to the differential in pressure between the fluid from the pressure of the fluid from the first predetermined pressure point and the fluid from the second predetermined pressure point. 16. A pressure control system for monitoring fluid pressure for a pressurized system, the pressure control system comprising: a fluid control device for affecting the pressure of fluid downstream from the fluid control device;an actuator for opening and closing the fluid control device; anda control module for processing pneumatic signals from at least one predetermined pressure point upstream or downstream from the fluid control device, the control module sending signals to the actuator to open or close the fluid control device responsive to pneumatic signals, fluid is taken from the predetermined pressure point to the control module via a first pressure sensing line, the control module comprising: a pressure sensor to determine pressures of the fluid from the at least one predetermined pressure point;an air switch to receive pneumatic signals from the pressure sensor responsive to the pressure of the fluid from the at least one predetermined pressure point; anda charge valve to send a pneumatic signal to the actuator or exhaust fluid from the control module responsive to a pneumatic signal received from the air switch; anda second pressure sensing line providing a fluid under pressure from a second predetermined pressure point to the control module, the control module opening and closing the fluid control device responsive to a differential in pressure between the pressure of the fluid from the predetermined pressure point and the fluid from the second predetermined pressure point. 17. The pressure control system of claim 16 wherein the first predetermined pressure point is positioned upstream from the fluid control device and the second predetermined pressure point is positioned downstream of the fluid control device. 18. The pressure control system of claim 16 wherein the first predetermined pressure point is positioned upstream from the fluid control device and the second predetermined pressure point is positioned at a location within the pressurized system. 19. The pressure control system of claim 16 wherein the fluid from the second predetermined pressure point is fed to the pressure sensor of the control module in addition to the first predetermined pressure point. 20. The pressure control system of claim 19 wherein the pressure sensor provides a pneumatic signal to the air switch responsive to the differential in pressure between the fluid from the pressure of the fluid from the first predetermined pressure point and the fluid from the second predetermined pressure point.