Valve with inherent enhanced turbulent flow metering device and flow regulation
A valve incorporates a device causing turbulents in the water stream just before passing over the turbine fins of the flow sensor. The device actually increases the Reynolds number or turbulence of the water stream increasing the contact of the water on the turbine. This causes the turbine to rotate more efficiently for the given flow volume passing over the flow measuring device. The improved efficiency results in better accuracy and performance over the entire flow range. In one embodiment the turbulent device forces the flow stream to rotate counter clockwise and hit the turbine fins causing higher force which makes the turbine turn more efficiently. The turbine is designed such that the major portion of the fin surface area is perpendicular to the turbulent flow stream. This opposed direction causes more force to be placed on the turbine fin by the water stream.
1. A valve having a flow channel defined therethrough, comprising:
a turbine rotationally positioned within the flow channel; and
a turbulent device fixedly positioned within the flow channel upstream of the turbine, the turbulent device having a helical outer surface that forms at least one helical flow path that traverses an entire periphery of the turbulent device.
2. The valve of claim 1 , wherein the helical outer surface of the turbulent device is configured to extend entirely across the flow channel.
3. The valve of claim 1 , wherein the turbine includes at least one fin positioned on an outer surface thereof and configured to impart rotation in a first direction to the turbine in the presence of fluid flow through the flow channel, and wherein the helical outer surface of the turbulent device is configured to impart rotation of the fluid flow through the flow channel in the first direction.
4. The valve of claim 3 , wherein the at least one fin is configured to impart counter-clockwise rotation of the turbine, and wherein the helical outer surface is configured to impart counter-clockwise rotation of the fluid flow downstream thereof.
5. The valve of claim 1 , further comprising at least one fixed element secured within the flow channel, and wherein the turbine is rotationally attached to the at least one fixed element.
6. The valve of claim 5 , wherein the turbine is rotationally attached to the at least one fixed element by a pair of shaft ends.
7. The valve of claim 5 , wherein the at least one fixed element includes an upstream fixed element and a downstream fixed element.
8. The valve of claim 7 , wherein the upstream fixed element includes a frusto-conical leading surface.
9. The valve of claim 8 , wherein the downstream fixed element includes a frusto-conical trailing surface.
10. The valve of claim 1 , further comprising a flow connector having a first end and a second end, the flow channel extending therethrough, and wherein the turbine is positioned in the flow connector.
11. The valve of claim 10 , wherein the turbulent device is positioned in the flow connector.
12. The valve of claim 10 , further comprising a valve operator, the flow channel extending therethrough, and wherein the turbulent device is positioned in the valve operator.
13. The valve of claim 12 , wherein the valve operator includes a flow restrictor.
14. An apparatus, comprising:
a body defining a flow channel therethrough;
a turbine rotationally positioned within the flow channel; and
a turbulent device positioned within the flow channel upstream of the turbine, the turbulent device configured to include a helical outer surface that forms at least one helical flow path that traverses an entire periphery of the turbulent device to increase the Reynolds number of a fluid flowing through the flow channel.
15. The apparatus of claim 14 , wherein the helical outer surface contacts an inner surface of the flow channel, the helical flow path being defined therebetween.
16. The apparatus of claim 15 , wherein the turbine includes at least one fin positioned on an outer surface thereof and configured to rotate the turbine in the presence of fluid flowing through the flow channel, and wherein the helical outer surface of the turbulent device is configured to increase turbulence of the fluid so as to aid rotation of the turbine.
17. The apparatus of claim 15 , wherein the turbine includes at least one fin positioned on an outer surface thereof and configured to rotate the turbine in a first direction in the presence of fluid flowing through the flow channel, and wherein the helical outer surface of the turbulent device is configured to cause rotation in the first direction in the fluid flowing through the channel upstream of the turbine.
18. The apparatus of claim 15 , wherein the turbine includes at least one fin positioned on an outer surface thereof and configured to rotate the turbine when fluid flowing through the flow channel contacts a surface thereof, and wherein the helical outer surface of the turbulent device is configured to cause rotation in the fluid flowing through the channel such that the fluid contacts the surface of the at least one fin generally perpendicular.
19. The apparatus of claim 15 , wherein the turbine includes at least one fin positioned on an outer surface thereof and configured to rotate the turbine when fluid flowing through the flow channel contacts a surface thereof, and wherein the helical outer surface of the turbulent device is configured to direct the fluid flowing through the channel generally normal to the surface of the at least one fin.
20. A valve, comprising:
a valve operator having a first fluid passage defined therethrough;
a flow connector connected to the valve operator, the flow connector having a second fluid passage defined therethrough in fluid communication with the first fluid passage, the first fluid passage and the second fluid passage forming a flow channel;
a turbine rotationally positioned within the flow channel; and
a turbulent device positioned within the flow channel upstream of the turbine, the turbulent device having a helical outer surface that forms at least one helical flow path that traverses an entire periphery of the turbulent device that is configured to increase turbulence of fluid flowing through the flow channel.