INSPECTION APPARATUS GUIDE SYSTEM

摘要

A valve body in a passage of a housing connected to a through hole in a sealed machine casing can allow an inspection apparatus into an interior of the casing when open, and prevents fluid flow through the passage when closed. Seals can engage the inspection apparatus to prevent fluid flow through the passage during inspection or inspection apparatus movement. A guide conduit in the casing can include branches and can guide the inspection apparatus to multiple inspection sites. Guide marks can identify the branches to assist with navigation within the casing.

主权项

1. An inspection apparatus guide system comprising:
a housing configured at a first end thereof for attachment to a casing, the housing including a main passage therethrough configured for communication with a first through hole in the casing, the main passage being sized to receive an inspection apparatus extendible therethrough; a valve body mounted in the housing so that an outboard portion of the main passage lies between the valve body and a second end of the housing, the valve body having a first position in which the valve body seals the outboard portion of the main passage from the interior of the casing, the valve body further having a second position in which the valve body opens the main passage to the interior of the casing; and a first seal mounted in the housing so as to project into the main passage farther from the casing than the valve body is with an inner periphery of the first seal that is smaller than an outer periphery of the inspection apparatus so that the first seal is arranged to sealingly engage the inspection apparatus, thereby substantially preventing passage of fluid between the inner periphery of the first seal and the outer periphery of the inspection apparatus.