초록 ▼

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow and backflow through a defined section of pipe. The pipe sealing apparatus has a first inflatable plug at a first end and a second inflatable plug at a second end connected by an elongated flexible tensile

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow and backflow through a defined section of pipe. The pipe sealing apparatus has a first inflatable plug at a first end and a second inflatable plug at a second end connected by an elongated flexible tensile member and a fluid pressure hose. Each inflatable plug has a plurality of ports that may be connected to a source of fluid pressure, plugged, or left unplugged depending on the application. The second inflatable plug may be inflated either simultaneous with the first plug, or independent of the first plug. Each inflatable plug also has a flow-through conduit.

대표청구항 ▼

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow and backflow through a defined section of pipe. The pipe sealing apparatus has a first inflatable plug at a first end and a second inflatable plug at a second end connected by an elongated flexible tensile

A pipe sealing apparatus insertable inside a pipe and inflatable therein to prevent fluid flow and backflow through a defined section of pipe. The pipe sealing apparatus has a first inflatable plug at a first end and a second inflatable plug at a second end connected by an elongated flexible tensile member and a fluid pressure hose. Each inflatable plug has a plurality of ports that may be connected to a source of fluid pressure, plugged, or left unplugged depending on the application. The second inflatable plug may be inflated either simultaneous with the first plug, or independent of the first plug. Each inflatable plug also has a flow-through conduit. PID) control. 6. The fluid delivery and control system of claim 1 wherein the pressure sensor is provided upstream of the electronically controlled valve. 7. The fluid delivery and control system of claim 1 wherein the pressure sensor is provided downstream of the electronically controlled valve. 8. The fluid delivery and control system of claim 1 wherein the electronically controlled valve comprises a boot valve, and further comprising a boot control volume line and a solenoid interposed in the line, wherein the solenoid is controllably operated by the control circuitry to regulate fluid pressure within a boot of the boot valve to controllably adjust a throttling element of the boot valve. 9. The fluid delivery and control system of claim 8 wherein the boot control volume line is provided between an upstream line of the valve and a boot volume of the boot valve. 10. The fluid delivery and control system of claim 8 wherein the boot control volume line is provided between a boot volume of the boot valve and a downstream vent. 11. The fluid delivery and control system of claim 10 wherein the downstream vent is vented to atmosphere. 12. The fluid delivery and control system of claim 1 further comprising a communication interface operative to adjustably configure the control circuitry. 13. The fluid delivery and control system of claim 1 wherein the control circuitry adjusts the electronically controlled valve to increase fluid pressure to a fluid flush operating point. 14. A fluid flow control system, comprising: a pressure sensor to detect fluid pressure oscillations within a fluid delivery line; an electronically controlled flow regulating valve having a central bore with a variable outer diameter, the bore provided in the line to impart a substantially linear fluid streamline through at least a portion of the central bore and operative to regulate fluid flow through the line; and a processor communicating with the pressure sensor and the electronically controlled flow regulating valve, the sensor generating a PID feedback control signal; and the processor operative to regulate fluid flow through the valve to mitigate fluid pressure oscillations in the line. 15. The control system of claim 14 comprising a plurality of electronically controlled valves, each controlled by the processor and operative to regulate fluid flow through respective lines of an irrigation system. 16. The control system of claim 14 wherein the fluid pressure oscillations result from non-steady state flow conditions within the line. 17. A fluid flow control system, comprising: a pressure sensor to detect fluid pressure within a fluid delivery line; an electronically controlled flow regulating valve provided in the line to impart a substantially linear flow axis and operative to regulate fluid flow through the line; and a processor communicating with the pressure sensor and the electronically controlled flow regulating valve, the sensor generating a PID feedback control signal; wherein the processor is operative to regulate fluid flow through the valve to mitigate fluid pressure oscillations in the line and is further operative to adjust a sampling rate of the pressure sensor to a correction frequency that substantially negates detection of the fluid pressure oscillations. 18. A fluid flow control system, comprising: a pressure sensor to detect fluid pressure within a fluid delivery line; an electronically controlled flow regulating valve provided in the line to impart a substantially linear flow axis and operative to regulate fluid flow through the line; and a processor communicating with the pressure sensor and the electronically controlled flow regulating valve, the sensor generating a PID feedback control signal; wherein the processor is operative to regulate fluid flow through the valve to mitigate fluid pressure oscillations in the line and is further operative to discern an operating pressure base line about which fluid pressure