Tool for pulling a tube section from a tube sheet

Details Tool for pulling a tube section from a tube sheet Tool for pulling a tube section from a tube sheet

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.

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