Gas-Line Probe Adapter for Connecting Vacuum Jacketing

摘要

A vacuum jacketed gas line adaptor with a flange cover for an existing pipeline sample take-off probe encasing a sample line and hermetically sealed to a vacuum valve housing having an sealable access port and containing a vented bleed valve and a block valve, fluidly connected to the sample line and a length of vacuum jacketed tubing sealing connected to the valve housing and in vacuum communication therewith, where the vacuum jacketed tubing surrounds the sample line to provide thermal isolation from the ambient for the sample line to a sample vaporizer.

主权项

1. A vacuum jacketed probe adapter for connecting to a cryogenic liquid pipeline probe including a sample take-off line, a cryogenic valve and a vacuum port connection, said adapter comprising:
a) a flange member of a select length and first cross-section dimension adapted to overlie and enclose the probe and hermetically seal the probe from an ambient environment; b) a first length of hollow vacuum tubing with a first end and a second end, having a cross-sectional dimension corresponding to that of the flange member to be hermetically sealable thereto at said first end and projecting from said flange member hermetically sealable to the flange; c) a valve housing defining a chamber and at least a first, second and third entry ports spaced from the probe, said valve housing being hermetically sealed to the second end of the first length of hollow vacuum tubing at said first entry port, said second entry port having an sealable door for access to the interior of the valve housing, said housing enclosing a first cryogenic venting bleed valve and a second cryogenic blocking valve, said cryogenic bleed and block valves being accessible through said second entry port; d) a sample takeoff line for transmitting a cryogenic liquid sample from the probe, extending centrally through the first length of hollow vacuum tubing, said take off line connectable to the probe and projecting into said valve housing, said sample take off line being connected to said first cryogenic venting bleed valve and then exiting the valve housing from said a second cryogenic blocking valve through said third entry port; e) a second length of hollow vacuum tubing with a first end and a second end, hermetically connected to said third entry port at said first end of said second length of hollow vacuum tubing, said sample take off line being disposed within and extending centrally through said second length of hollow vacuum tubing; and f) a connector in said take-off line formed proximate to the second end of said second length of hollow vacuum tubing to feed the content of the take-off sample into a vaporizer cabinet.