Passive capillary wicking device
A wicking device is an elongated tubular assembly having opposing ends and formed of an elongated, porous, tubular, heat resistant, metallic core suggestedly of interwoven resilient wire, a wicking layer of glass fiber yarns extending generally longitudinally along the outer surface of the metallic core, at least substantially surrounding the metallic core, and an exterior of interwoven glass fiber yarns forming an elongated tubular outer jacket running the length of the device surrounding the wicking layer of glass fiber yarns and the metallic core. The assembly is stripped of organic materials following assembly as part of the manufacturing process, preferably by heating the assembly.
1. A wicking device suitable to be buried and operate in soil and comprising in a tubular assembly:
an elongated, porous, tubular, heat resistant, metallic core;
a wicking layer of glass fiber yarns extending generally longitudinally along an outer surface of the metallic core, at least substantially surrounding the metallic core; and
an exterior of interwoven glass fiber yarns forming an elongated tubular outer jacket running the length of the device surrounding the wicking layer of glass fiber yarns and the metallic core;
the glass fiber yarns of the wicking layer and the elongated tubular outer jacket being stripped of essentially all organic matter before burial.
2. The wicking device of claim 1 consisting essentially of the elongated, porous, tubular, heat resistant, metallic core and the wicking layer of glass fiber yarns and the exterior of interwoven glass fiber yarns forming the elongated tubular outer jacket.
3. The wicking device of claim 1 wherein the glass fiber yarns of the wicking layer and the tubular outer jacket have been heated sufficiently to remove essentially all organic matter.
4. The wicking device of claim 3 wherein the glass fiber yarns have been heated to at least a temperature of 300° F. before burial.
5. The wicking device of claim 1 further comprising a reinforcement jacket of interwoven wire surrounding the tubular outer jacket of interwoven glass fiber yarns.
6. A method of making the wicking device of claim 1 as an assembly comprising the steps of:
surrounding the metallic core with the wicking layer of glass fiber yarns extending generally longitudinally along the outer surface of the metallic core, at least substantially surrounding the metallic core;
interweaving an outer jacket of glass fiber yarns surrounding the metallic core and the wicking layer of glass fiber yarns to form the tubular assembly; and
stripping the tubular assembly of any organic matter.
7. The method of claim 6 wherein the stripping step comprises heating the tubular assembly sufficiently to remove the organic matter.
8. The method of claim 6 wherein the stripping step comprises heating the assembly to a temperature of at least 300° F.
9. A method of using a wicking device comprising the steps of:
locating a first continuous length of the wicking device of claim 1 beneath a surface of soil; and
locating one end of the first continuous length of the wicking device below a remainder of the first continuous length of the wicking device to drain the wicking device.
10. The method of claim 9 further comprising the steps of
locating a second continuous length of the wicking device beneath the surface of the soil spaced from and oriented generally parallel with the first continuous length of the wicking device with one end of the second continuous length of the wicking device below a remainder of the second continuous length of the wicking device; and
connecting the one end of each of the first and second continuous lengths to a common collector tube also located beneath the surface of the soil.
11. The method of claim 9 wherein the step of locating the first continuous length of the wicking device beneath the surface of soil comprises providing enough vertical drop to the one end of the first continuous length to create suction drainage the remainder of the first continuous length of the wicking device.
12. The wicking device of claim 1 wherein the threads for the yarns of the wicking layer are continuous along the length of the device.
13. A wicking device suitable to be buried and operate in soil and comprising in a tubular assembly:
an elongated, porous, tubular, heat resistant, metallic core;
a wicking layer of glass fiber yarns extending generally longitudinally along an outer surface of the metallic core, at least substantially surrounding the metallic core; and
an exterior of interwoven glass fiber yarns forming an elongated tubular outer jacket running the length of the device surrounding the wicking layer of glass fiber yarns and the metallic core;
wherein the glass fiber yarns of the wicking layer and the tubular outer jacket have been stripped of any hydrophobic coating before burial.
14. The wicking device of claim 13 having been heated before use to strip essentially any hydrophobic coating from the glass fiber yarns of the wicking layer and the outer jacket.
15. A wicking device suitable to be buried and operate in soil and comprising in a tubular assembly:
an elongated, porous, tubular, heat resistant, metallic core;
a wicking layer of glass fiber yarns extending generally longitudinally along an outer surface of the metallic core, at least substantially surrounding the metallic core; and
an exterior of interwoven glass fiber yarns forming an elongated tubular outer jacket running the length of the device surrounding the wicking layer of glass fiber yarns and the metallic core;
wherein the wicking device has been heated to a temperature of at least 300° F. before burial.
16. The wicking device of claim 15 having been heated sufficiently long at 300° F. to strip the glass fiber yarns of the wicking layer and the outer jacket of essentially all organic matter.
17. A method of making a wicking device comprising the steps of:
providing an elongated, porous, tubular, heat resistant, metallic core;
providing a wicking layer of glass fiber yarns extending generally longitudinally along an outer surface of the metallic core, at least essentially surrounding the metallic core along essentially the length of the device; and
interweaving glass fiber yarns to form an elongated tubular outer jacket running the length of the device surrounding the wicking layer of glass fiber yarns and the metallic core; and
stripping the assembled core, wicking layer and tubular outer jacket of essentially all organic material present in the assembled core, wicking layer and tubular outer jacket.
18. The method of making the wicking device of claim 17 wherein the stripping step comprising the step of heating the assembled core, wicking layer and tubular outer jacket to an internal temperature of at least 300° F.