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US 4,298,054 AGranted
Method of withdrawing a mobile sensor from a heat exchanger
AssigneeIntercontrole
InventorAndrev Adamowski
Life of this patent
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AssigneeIntercontrole
InventorAndrev Adamowski
Estimating the term…
A method of withdrawing a mobile inspection sensor assembly from the lower header of a vertical tubular heat-exchanger includes the steps of introducing into a guide tube of the assembly and into a water tube of the heat-exchanger aligned therewith an end portion of a dummy sensor in the form of a tube of a relatively rigid material, which may nevertheless be slightly bent, securing the end of the dummy sensor to the water tube by actuating means operable at the other end of the sensor tube, and sliding the sensor assembly along the tube of the dummy to an access opening of the header. A dummy sensor for carrying out this method includes an expansible head which may be mechanically or pneumatically operated to fix the sensor in a water tube.
A method for withdrawing a mobile sensor apparatus from a header of a tubular heat-exchanger, the heat-exchanger having a closable access opening and the sensor apparatus having expansible mandrels by which the apparatus can be secured to tubes of the heat-exchanger and at least one guide tube by which a sensor can be introduced into a tube of the heat-exchanger to be inspected, said method comprising the steps of
In sensor apparatus for use in a tubular heat-exchanger,
A method for returning a mobile sensor apparatus to a header of a water-tube heat-exchanger having an access opening, said sensor apparatus including a framework carrying expansible mandrels by which the apparatus can be fixed to water-tubes of the exchanger and at least one guide tube for the introduction of a sensor to one of the water tubes, said method comprising the steps of passing a dummy sensor through one of the guide tubes, engaging the dummy sensor in one of the water-tubes sliding the apparatus along the dummy sensor until the expansible mandrels engage in water tubes, and withdrawing the dummy sensor from the guide tube.
Dependencies are inferred from the claim text.