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Technical description
The machine is composed of
four overlapping sections with horizontal ways.
The three upper sections are
used for sterilization while the inferior one is for the cooling process.
The upper section of the machine and his lateral parts are closed with a
inox cap AISI 304 completely removing.
The steam distribution of the steam
into the cooker section.
The rotation of the tin is alternate in every
section obtain the best distribution of warmth in the tin and to exploit at
the best the surface of thermic exchange between the tin and the external
surrounding.
The speed of alternate rotation doesn't depend on the speed of
tin entrance into the sterilizer. This allows to have a very soft working
procedure of product in the metal recipient and, at the same time, a drastic
reduction of sterilization times, so it's possible to make better the
exposition of the tin to the sterilization temperature.
The inferior course,
responsible for the cooling process, is covered by a net inox system for the
distribution of water. This is pumped on the tins through some nebulizer
nozzles that divide it giving a continuous exposition of the tins to cooling,
avoiding the danger of died zones.
The water can be recycled for other
working process.
The cooling water, before being introduced into the net
nozzles, must be filtered. The tin rotation will be done by motorized rolls,
in inox AISI 304 with regolable speed, it is made by four motoriductor 2.0
HP.
The control and the regulation of temperature is realized by feeler PT
100 for the survey in the sterilization chamber; the signal is sent to a
pneumatic regulating valve, air-open model, that is on the sterilization
chamber of the machine.
The sterilizer has other safety devices such as:
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N° 5 controllers of the
correct position of the tins on the four sections.
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Alarm for low pressure
compressed air.
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N° 7 alarms thermic release
of all the machine motors.
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Alarm when the transfer
shovel for the tins of second and third sector doesn't work .
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Alarm for low
temperature.
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N° 2 alarms for the breaking of the main chain.
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Alarm for the tins slot at
the clearance.
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N° 2 alarms for a not
correct passing of the tins through the four sections.
All these devices both cause
the immediate stop of machine And the warning signal on the electric cabin.
All the regulation and control instruments of the machine are installed on a
particular electric cabin that also has all the safety devices and alarms
for the correct working of the plant.
The feeding of the tins takes place
for a conveyor trapezoid belt, set in motion by a motorvariator 0,5 HP, that
has a pneumatic display synchronized with the main chain. The release of
tins takes place with the same conveior belt actioned by a motovariator 5.0
HP, too.
The main chains has an high breaking load and they are balanced,
those for the moving of the rollers are a special model with fixed and
dimostable tongues with at their end a delrin ferrule for the rotation of
the piston pin of the roller.
The chains for the rotation of the roller are
reinforced with high breaking load and with full rollers.
The tension of the
main chains is made automatically by four hydraulic cylinders, helped by a
cabin that assures the right pressure.
The carrying structure of the
sterilizzer-cooler is built with structural tee steel of carbon treated with
antirust and aluminium, while the lids, the lateral sealings, the round
rollers and the storage pools of cooling water are of inox steel.
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