| 摘要 |
1,157,394. Making pressure vessels; assembling force fits; jointing. BAROGENICS Inc. 12 Jan., 1968 [22 May, 1967], No. 1916/68. Headings B3A, B3U and B3V. [Also in Divisions B1 and G6] A pressure vessel is made by expanding a hollow, segmented, support cylinder 10, inserting a sleeve 14 into the cylinder and allowing the support to contract to produce hoop compression in the sleeve. The sleeve is then machined to make its ends flush with the support and end caps are welded to the ends. The support cylinder is composed of segments 18a &c., each with two pairs of holes 22 through which pins 24 are inserted. The pins preferably extend the whole length of the cylinder but shorter pins may be used. The pin ends are threaded and nuts serve to clamp the segments together. The support cylinder is expanded either by the sleeve 14 or by an intermediate sleeve 30. In the former case the bore of the support cylinder is tapered as is the outer surface 27 of the sleeve. The sleeve is forced into the bore by an hydraulic press or jack. This method is particularly suitable for small pressure vessels. In the latter case the intermediate sleeve 30 is expanded by a wedge 36 forced into a slot in the sleeve to expand the support cylinder. Alternatively several wedges (54), (55), (56) may be used in spaced slots in the sleeve, Fig. 4 (not shown), or two wedges (42), (44) co-operating together in one slot, Fig. 3 (not shown). |
