초록 ▼

An arrangement for a control valve for controlling pressure and flow rate of a fluid, the fluid flowing via an inlet into the control valve being brought to rotate about a main flow axis before the fluid, at least with reduced pressure or speed energy, flows via an outlet opening from the control va

An arrangement for a control valve for controlling pressure and flow rate of a fluid, the fluid flowing via an inlet into the control valve being brought to rotate about a main flow axis before the fluid, at least with reduced pressure or speed energy, flows via an outlet opening from the control valve and where at least one inlet port communicating with the inlet being provided tangentially in relation to an inlet portion of the speed reduction chamber located in the control valve, and where the speed reduction chamber, provided substantially concentric with the main flow axis, is divergent over at least the first portion of the main flow direction.

대표청구항 ▼

1. A control valve for controlling a pressure and a flow rate of a fluid, comprising: an inlet;a speed reduction chamber having an inlet portion extending from the inlet; andan outlet,wherein fluid flowing from the inlet is brought to rotate about a main flow axis before flowing out of the outlet vi

1. A control valve for controlling a pressure and a flow rate of a fluid, comprising: an inlet;a speed reduction chamber having an inlet portion extending from the inlet; andan outlet,wherein fluid flowing from the inlet is brought to rotate about a main flow axis before flowing out of the outlet via the speed reduction chamber at a reduced pressure or flow rate, the speed reduction chamber being substantially concentric with the main flow axis and being in part divergent along the main flow axis, wherein the inlet portion of the speed reduction chamber is a void convergent along the main flow axis, wherein the speed reduction chamber has a hyperboloid divergent portion leading to the outlet, with the hyperboloid divergent portion having a maximum diameter greater than a maximum diameter of the inlet portion, and wherein a controllable flow inlet valve is disposed between the inlet and the inlet portion of the speed reduction chamber and wherein the speed reduction chamber has a conical divergent portion between the inlet portion and the hyperboloid divergent portion. 2. A control valve for controlling a pressure and a flow rate of a fluid, comprising: an inlet;at least one inlet channel;at least one inlet port;a controllable flow inlet valve configured to adjust fluid flow from the inlet and the at least one inlet channel through the at least one inlet port; anda speed reduction chamber having an inlet portion, configured to receive fluid tangentially from the at least one inlet port, extending continuously to an outlet,wherein fluid flowing from the inlet is brought to rotate about a main flow axis by the at least one inlet channel and the at least one inlet port before flowing out of the outlet via the speed reduction chamber at a reduced pressure or flow rate, the speed reduction chamber being substantially concentric with the main flow axis and being in part divergent along the main flow axis, wherein the inlet portion of the speed reduction chamber is convergent along the main flow axis, wherein the speed reduction chamber has a hyperboloid divergent portion leading to the outlet, with the hyperboloid divergent portion having a maximum diameter greater than a maximum diameter of the inlet portion and a minimum diameter greater than a diameter of the outlet, and wherein the controllable flow inlet valve is disposed between the inlet and the inlet portion of the speed reduction chamber. 3. The control valve as claimed in claim 2, wherein the inlet is axially oriented to the main flow axis. 4. The control valve as claimed in claim 2, wherein the speed reduction chamber is essentially free of internal bodies. 5. The control valve as claimed in claim 2, wherein the speed reduction chamber further has a first conical divergent portion and a second conical divergent portion, wherein the hyperboloid divergent portion is located between the first conical divergent portion and the second conical divergent portion and wherein the hyperboloid divergent portion prevents a large reduction in droplet size in a dispersed phase of the fluid as the flow rate reduces in speed. 6. The control valve as claimed in claim 2, wherein the inlet portion is directly adjacent the inlet such that fluid flows directly from the inlet into the speed reduction chamber as controlled by the control valve. 7. The control valve as claimed in claim 2, wherein the hyperboloid divergent portion has a length along the main flow axis greater than a distance between the inlet and an end of the inlet portion along the main flow axis. 8. The control valve as claimed in claim 2, wherein the inlet has an inlet port and an adjustable control piston for controlling the flow rate of the fluid into the speed reduction chamber. 9. The control valve as claimed in claim 8, wherein the control piston includes projections that protrude into the inlet ports when the control piston is displaced. 10. The control valve as claimed in claim 2, wherein the inlet is radially displaced from the main flow axis. 11. The control valve as claimed in claim 10, wherein the inlet is tangentially oriented to the main flow axis. 12. The control valve as claimed in claim 11, wherein the fluid contains droplets of a dispersed phase within a continuous phase. 13. A method of reducing a flow rate of a fluid comprising droplets of a dispersed phase within a continuous phase, the method comprising: introducing the fluid into a control valve through an inlet, at least one inlet channel and at least one inlet port while causing the fluid to rotate around a main flow axis of a speed reduction chamber, the speed reduction chamber having an inlet portion extending from the inlet and receiving fluid tangentially from the at least one inlet port;increasing the tangential velocity of the rotating fluid flow by introducing the fluid through a convergent portion of the control valve, the convergent portion of the control valve causing a reduction in the rotation radius of the fluid flow;introducing the fluid into a hyperbolic divergent portion of the speed reduction chamber, with the hyperboloid divergent portion having a maximum diameter greater than a maximum diameter of the inlet portion and a minimum diameter greater than a diameter of an outlet of the control valve, so as to avoid a large reduction in the droplet size in the dispersed phase of the fluid; andcontrolling the fluid flow rate through the inlet by passing the fluid through a controllable flow inlet valve, disposed between the inlet and the inlet portion of the speed reduction chamber, to adjust fluid flow from the inlet and the at least one inlet channel through the at least one inlet port to the inlet portion and continuously to the outlet. 14. The method of claim 13, wherein the fluid is introduced in a direction that is axially oriented with the main flow axis. 15. The method of claim 13, wherein the fluid is introduced in a direction tangential to the main flow axis. 16. The method of claim 13, further comprising: preventing a large reduction in the droplet size in the dispersed phase of the fluid as the fluid flow reduces in speed by passing the fluid through a first conical divergent portion, then through the hyperboloid divergent portion and then through a second conical divergent portion, wherein the hyperboloid divergent portion is located between the first conical divergent portion and the second conical divergent portion of the speed reduction chamber. 17. The method of claim 13, wherein the fluid flows directly from the inlet into the speed reduction chamber as controlled by the control valve. 18. The method of claim 13, wherein the fluid flows through the hyperboloid divergent portion for a distance, along the main flow axis, greater than a distance between the inlet and an end of the inlet portion along the main flow axis. 19. A method of reducing a flow rate of a fluid comprising droplets of a dispersed phase within a continuous phase, the method comprising: introducing the fluid into a control valve through an inlet, the inlet causing the fluid to rotate around a main flow axis of a speed reduction chamber, the speed reduction chamber having an inlet portion extending from the inlet;increasing the tangential velocity of the rotating fluid flow by introducing the fluid through a convergent portion of the control valve, the convergent portion of the control valve causing a reduction in the rotation radius of the fluid flow;introducing the fluid into a hyperbolic divergent portion of the speed reduction chamber, with the hyperboloid divergent portion having a maximum diameter greater than a maximum diameter of the inlet portion, so as to avoid a large reduction in the droplet size in the dispersed phase of the fluid;controlling the fluid flow rate through the inlet by passing the fluid through a controllable flow inlet valve prior to introducing the fluid through the inlet; andremoving the fluid from the control valve through an outlet provided in an end plate, said end plate sealing said control valve. 20. The method of claim 19, further comprising removing the fluid through the outlet positioned in the end plate at a position which does not coincide with the main flow axis of the speed reduction chamber.