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Home > Products > OFT-9 FURNACE VIEWING TELEVISION SYSTEM OFT-9 FURNACE VIEWING TELEVISION SYSTEM The OFT-9 is a special system designed specifically for the applications where it is necessary to be able to vary the penetration of the camera in the furnace; for instance, to observe the operation of both over- and under-firing burners from a single insertion point in the furnace roof. In this instance, the camera operates like an inverted periscope and is lowered between the transfer mechanism structure to see below the stock level. 
The water cooled and air purged camera housing is stainless
steel, with an overall diameter of less than 50mm; depending on application,
the length can be in excess of 4 metres. The housing is normally fitted to an
insertion port in the furnace roof, and lowered to a suitable position where
it can be locked in place. Separate locking is provided for vertical and rotational
movement, so the unit can be 'panned' round whist held at a fixed insertion
level.
Shorter versions can be inserted horizontally, in this configuration the bending forces on the housing limit the overall length. One concept of this design is that it is easily moved to different insertion points on the furnace, if this is large as in the case, for example, of a plate-annealing furnace. To facilitate this, all connections to the camera housing are by quick-release fittings which may me made and disconnected whilst the system is on-line without escape of coolant. The insertion point hardware is relatively inexpensive and it is intended that a unit remains permanently fixed at each insertion point, as accurate alignment with the internal mechanism of the furnace is essential. Interface with the cooling and electrical services is provided at each point by matching quick- release fittings, which are permanently fixed. A master electrical junction box is located at a convenient point and houses camera power supplies, coolant flow, air pressure and camera temperature monitoring facilities, as well as local alarm indications and volt-free contacts for remote signalling. High-efficiency filters for the air supply are also fitted at this location, allowing normal shop air supplies to be used for the cooling air. Pictures are displayed on an industrial video monitor at the operator's position, but may also be viewed locally to the camera for alignment purposes. A portable monitor is used for this purpose. The system supply includes all items described above, including both monitors. Additional insertion point hardware is required if more than one location needs to be monitored. As the OFT-9 systems are built to specific requirements, Industrial Television Ltd should be contacted at an early stage to ensure users obtain the optimum performance for their application. |
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