Metal working – Means to assemble or disassemble – Heat exchanger
Patent
1985-07-22
1987-06-09
Schmidt, Frederick R.
Metal working
Means to assemble or disassemble
Heat exchanger
29252, 254 29A, B23P 1904
Patent
active
046709754
ABSTRACT:
A tool for pulling heating tube sections from a tube sheet of a steam generator, includes a threaded pulling mandrel screwed to the heating tube section, a mounting plate fixed to the tube sheet, a hydraulic linear drive having a cylinder fastened to the mounting plate and a first lifting piston, a hydraulic clamping means having a cylinder surrounding the mandrel and being fastened to the first lifting piston, wedge-shaped clamping jaws having wide and narrow ends and being movable in longitudinal direction of the mandrel for engaging the clamping piston with the mandrel, and second and third hydraulic lifting pistons of the clamping piston, the second lifting piston resting against the narrow ends and the third lifting piston resting against the wide ends of the clamping jaws.
REFERENCES:
patent: 3938427 (1976-02-01), Warrington
patent: 4015821 (1977-04-01), Warrington
patent: 4095335 (1978-06-01), Lassarat
patent: 4366617 (1983-01-01), Nanstiel et al.
patent: 4438901 (1984-03-01), Reneau et al.
Greenberg Laurence A.
Kraftwerk Union Aktiengesellschaft
Lerner Herbert L.
Schad Steven P.
Schmidt Frederick R.
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