Page 55 of 66 Pages
9.7 Door Safety System for models 5050, 5075
9.7.1 Door Components
A circular frame with a “C” cross section is welded on the
topside of the vessel. When the door is closed it lays on
the “bottom leg” of the frame.
The door plate mechanism consist the following:
a. A centric shaft welded to the doorplate (2).
b. An arm housing (3) that holds the 8 arms and is able
to swivel on a thrust bearing. The housing is
secured.
c. Bakelite handle (4), which is operated by the
operator, is installed directly on the housing.
d. 8 arms (5), which are held in the arm housing in
such a way that they, are rotatable. These arms are
freely located in a guide (6), which enable them to
move in an angular movement due to the rotation of
the arm holder.
Note: the drawing provided below describes the door in
the “locked” position: The handle is positioned in
10:00-4:00 (hour) angle, and the arms are pushed
radially into the circular frame.
The “open” position is when the handle is located in
7:00-1:00 (hour) angle. In this position the arms are
retracted from the circular frame due to the rotary
movement of the arm holder to a position which is
described in dotted lines.
9.7.2 Safety means
The door is equipped with three safety means as follows:
9.7.2.1 Locking solenoid (7)
This solenoid is a “Normally pushed” pin type and is
located on an adjustable base (8). The solenoid’s pin
is spring loaded in such a way that when it is not
activated, the pin is pushed out.
A bracket with a hole is attached on the arm holder.
The hole is located in such a way that the solenoid
pin, when pushed, will be trapped in the hole.
An inclined tongue is welded to the bracket. This
tongue assists the pin to retract when the locking
mechanism is turned to the “unlocked position”.
When the pin is in the “locking position” it prevents
the arm holder from any angular movement.
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