Paper making and fiber liberation – Processes and products – Conditioning – preparing or repairing of apparatus
Patent
1993-11-23
1996-09-10
Lamb, Brenda A.
Paper making and fiber liberation
Processes and products
Conditioning, preparing or repairing of apparatus
162272, 29895, D21F 124
Patent
active
055542638
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE SPECIFICATION
The invention relates to a method for removing and installing rolls in a paper machine or the like substantially in the direction of the longitudinal axis of the rolls. The method is intended for use especially in connection with paper machines, paper-board machines, cellulose machines, presses, etc.
Previously it has been very slow and difficult to remove and reinstall the auxiliary rolls and doctor blades of a paper machine, for instance. As such machines are positioned close to the wall and the ceiling structures, there is not room enough for conventional lifting and displacing devices, but the work has been done by human power by utilizing hoist blocks and other similar auxiliary means. The removal of a single auxiliary roll may have required a whole working day of four men.
U.S. Pat. No. 3,744,837 discloses a device for displacing elongated bodies. This device, primarily intended for use in pipe installations, is however unsuitable for use in narrow spaces as it has to be supported from above by means of a lifter.
OBJECTS AND SUMMARY
The object of the present invention is to eliminate the above problems and to provide a method which makes the handling of the above-mentioned objects decisively more rapid and easier. This object is achieved by means of a method according to the invention, which is characterized in that support structure of the paper machine or the like above the roll to be displaced, the auxiliary displacing means being mounted to move along the support structure; displacing means so as to be suspended from it, and the other end of the roll to be displaced is supported by a displacing device; and the direction of the longitudinal axis of the roll to be displaced so that the auxiliary displacing means fixed to one end of the roll to be displaced moves along the support structure while the roll to be displaced moves with it.
The invention is based on the idea that the structures already existing in the vicinity of the roll to be displaced are utilized as a support structure for the roll to be displaced, a simple auxiliary displacing means being fitted in the support structures. One end of the roll to be displaced is supported by the auxiliary displacing means so that the roll can be displaced by moving it from the other end by means of a suitable displacing or lifting device positioned outside the paper machine or the like.
When using the method according to the invention, the time required for removing or installing the roll is reduced by more than one half as compared with the previous methods.
The cost of the apparatus required for embodying the method is very low, as e.g. a wire rope provided with a rolling means may be advantageously used as the auxiliary displacing means. When the rolls of the paper machine or the like are to be displaced, such a wire rope is fitted around one roll, and so one end of the roll to be displaced is suspended therefrom. The displacing device, in turn, may be any device by means of which the other end of the roll can be supported and moved.
In the following the invention will be described in greater detail in connection with the removal of a roll of a paper machine set forth as an illustrating embodiment with reference to the attached drawings, in which
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic side view of a few rolls of the paper machine;
FIG. 2 shows two of the rolls of FIG. 1 as seen in the longitudinal direction of the paper machine, and the realization of the method according to the invention;
FIG. 3 shows the auxiliary displacing means according to the invention in connection with the rolls shown in FIG. 1 in the same direction as in FIG. 1;
FIG. 4 is an enlarged view of the auxiliary displacing means of FIGS. 2 and 3 when detached;
FIG. 5 is a cross-sectional view of the rolling means of the auxiliary displacing means shown in the preceding figures, illustrating the attachment of the rolling means to the wire rope of the auxiliary displacing means; and
FIGS. 6a-6e show a few possible ways of rea
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The Way Things Work, Houghton Mifflin Co, Boston, Ma. (1988) pp. 60-63.
EWM Technology Ltd. OY
Lamb Brenda A.
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