US 4,432,931 AGranted

Inspection system

AssigneeElectric Power Research Institute, Inc.

InventorJohn L. Lockett

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Abstract

A system for the remote visual inspection of an annulus defined between two vessels. A conduit member is disposed in the annulus having one end adjacent an upper portion of the vessel and the other end terminating adjacent an area to be inspected. The conduit member is provided with at least one aperture adjacent the area to be inspected and sized to receive a housing containing a camera and a light source. The housing and light source are introduced into the conduit member by a support means which includes at least a first hollow, flexible hose member having a first end connected to the housing and a second end terminating adjacent an upper portion of the vessels. The flexible hose member is made sufficiently rigid for introducing the housing through the conduit member by pressurization with a fluid. The system further includes a source of electrical power for the camera, a light, and display means for receiving signals from the camera as well as means for maintaining the camera at a desired temperature.

Claims10

Dependent claims

A system for remote visual inspection of a structure comprising:

a primary vessel surrounded by a containment vessel;
at least one substantially rigid fixed conduit member terminating at a first end adjacent an upper portion of said vessels and a second end adjacent an area to be inspected, said conduit member being provided with at least one aperture in the wall thereof adjacent the area to be inspected;
a housing containing a camera and a light source for insertion into said first end of said conduit member;
means for controlling the temperature of said camera;
support means for said housing, said support means including at least a first hollow, flexible hose member having a first end connected to said housing and a second end attached to a spool assembly positioned adjacent said upper portion of said vessels;
means for supplying electrical power to said camera and light source and for transmitting signals from said camera;
display means for receiving signals from said camera;
pressurizing means for introducing a fluid into said flexible hose member in an amount sufficient to provide a desired amount of rigidity to the hose member to facilitate movement of said housing and hose member through the rigid fixed conduit member and;
means for driving said support means into said conduit member to position said housing adjacent the area to be inspected.

6 more elements

Dependencies are inferred from the claim text.