| 摘要 |
651,622. Stuffing-box substitutes. BRITISH INSULATED CALLENDER'S CABLES, Ltd., RICHARDSON, A. B. F. G., TUNNICLIFF, E. and FISHER, I. K. Oct. 11, 1948, No. 26479. [Class 122(v)] In a sealing gland, at the point of entry into a vessel containing pressure fluid of a relatively moving body, of the type in which the pressure of the fluid in the vessel is substantially balanced by that of a counter pressure liquid supplied to the interior of the gland, the counter pressure liquid is admitted to the clearance between the gland and the body passing through it, in the form of an annular stream inclined with respect to the direction of travel of the body so as to have a substantial component of movement in that direction. A gland at the inlet end of a vulcanising chamber 11 containing steam or other hot pressure fluid through which a rubber cable 10 passes comprises a holder 1, in two parts 1a and 1b, containing a pair of bushes 2, 3 shaped to form a pair of conical portions 5, 6 which converge towards a relatively short throat 4 lying partly in one bush and partly in the other portion. The contiguous ends 7, 8 of the bushes 2, 3 are coned and spaced to leave between them an annular port 9, inclined in the direction of movement of the cable, through which a stream of water is supplied via an annular chamber 18, longitudinal ports 17, and an annular groove 15 in the holder to the clearance between the throat 4 and the cable 10. The parts 1a 1b of the holder and the bush 5 and 6 are in halves and the bushes are axially located by collars 12 and 13. A third internally coned bush 31 having a throat 32 is fitted between the bush 5 and the inlet end of the gland and most of the surplus water escaping from the throat 4 flows through an annular port 34 formed by the space between the bushes 5 and 31 and is led away through a port 36 to a detachable chamber 37 on the external surface of the holder part 1a. The annular chamber 18 reduces the transfer of heat by conduction from the steam along the gland wall. |
