viZaar INVIZ BIG, Руководство по эксплуатации

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3.2 Option centering tools and trollies
Centering tools are necessary to perform
inspections with the INVIZ big in larger
tubes and pipes, nevertheless, a side view
or a straight view is employed. Centering
tools prevent the probe from lying on the
tube/pipe-sole, creating diffculties because
of unacceptable illumination and focusing
situations. Also centering tools prevent
the probe optics to get dirty through
debris in the empty pipe.
For good inspection results, always try to
attach a corresponding centering tool to
each tube diameter.
Two different centering tools technics are
available: ‘Sliding’ centering discs and
brushes for small diameters and larger
centering trollies with wheels reducing
friction. Pushing aids like epoxy fibre
rods or poles are attached to the bigger
trollies or directly to the probe when
using smaller discs only.
Standard centering tools
3 Supplementary equipment
Custom made centering tools
3.2a 3.2b
tighten 2 worm-screws
tighten 2 worm-screws
3.2g
3.2h
3.2i
3.2j
tighten 3 worm-screws
29mm head
open screws to attach or remove centering tool
3.2
When choosing a centering
tool always consider
obstacles, big weldings,
damaged (oval) pipes, dirt
etc. which decreases the
nominal inner pipe diame-
ter. Ignoring the rule to
choose centering tools at a
maximum of 75% - 85% of
the inner tube diameter may
end into the impact of the
probe get stuck inside the
inspection application. Always assure all
components screws of the
centering tools are perfectly
tightened to not get lost
inside the application.
Heavy centering tools can
cause damage to delicate
tube surfaces.