Material or article handling – Cylindrical bar handling device – Including ramp and retractable stop or ejector
Patent
1979-12-11
1982-11-09
Paperner, Leslie J.
Material or article handling
Cylindrical bar handling device
Including ramp and retractable stop or ejector
29726, 91445, 91527, 414909, B66F 1100
Patent
active
043582427
ABSTRACT:
Apparatus primarily for use in extracting and re-inserting heat exchanger tube bundles in chemical processing plants. An elongated frame structure having first and second pairs of spaced parallel beams is provided, with a carriage attachable to the tube bundle and moveable along the frame structure first beams in response to actuation of extraction cylinders. No portion of the frame structure extends above the first parallel beams, and an arm is mounted on each corner of the structure, pivotal about an axis perpendicular to the direction of tube withdrawal, and a cable extending from a central crane is mounted on each arm. A cylinder pivots each arm about its axis to change the position of the supporting crane back relative to the center of gravity of the structure. A pair of moveable side arms with clamps are provided for engaging a flange on the heat exchanger shell, and attitude control slings are also provided. Control for all of the power elements associated with the apparatus is provided by a control console connected by an umbilical to the apparatus, a pneumatic pilot control system including an air motor for powering hydraulic pumps providing the control function. A plurality of trolleys each having individually pivotal leaves are associated with the second pair of beams and rollable along and with respect to those beams, supporting the core at various points therealong during withdrawal.
REFERENCES:
patent: 3239076 (1966-03-01), Huff et al.
patent: 3257001 (1966-06-01), Postlewaite et al.
patent: 3836015 (1974-09-01), Travis
patent: 3880086 (1975-04-01), Khondker
patent: 3918536 (1975-11-01), Deeter et al.
patent: 3954187 (1976-05-01), Van der Woerd
patent: 3972420 (1976-08-01), Stock et al.
patent: 4053062 (1977-10-01), Travis
patent: 4227854 (1980-10-01), Coffey
Prepared Papers 1; Refinery Experience with the Hydraulic Tube-Bundle Extractor.
Industrial and Overseas Securities Limited
Paperner Leslie J.
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