Bonded high-pressure rubber hose, particularly for conveying gaseous media

摘要

The invention relates to a bonded high-pressure rubber hose comprising a flexible internal stripwound tube (10), a liquid and gas tight liner (2) made from rubber or plastic, reinforcing plies embedded in rubber, and in specific cases an adhesively bonded coupling body (11), the lower reinforcing ply or plies being disposed at an angle smaller than the so-called angle of equilibrium (35.26°). The invention is characterized by that in addition to the primary liner the hose (2) comprises a liquid and gas tight secondary liner (7) disposed above the small angle reinforcing ply or plies (1,1a), and that the following inequality holds for the angle of lay of the lowest reinforcing ply (1) of the hose: •where •a1 is the angle of lay of the lowest small angle reinforcing ply (1) •D s is the outside diameter of the internal stripwound tube (10) •D1 is the mean diameter of the lowest small angle reinforcing ply (1).

主权项

1. A bonded high-pressure rubber hose comprising a flexible internal stripwound tube, a liquid and gas tight primary liner made from rubber or plastic, reinforcing plies embedded in rubber, one or more of the reinforcing plies comprising lower reinforcing plies which are disposed at an angle of lay smaller than an angle of equilibrium, the reinforcing plies further comprising upper reinforcing plies disposed at a higher angle of lay than the angle of equilibrium, a liquid and gas tight secondary liner disposed above the lower reinforcing plies, and an adhesively bonded coupling, wherein if the primary liner should become damaged the secondary liner and the upper reinforcing plies can still withstand at least a design operating internal pressure of the hose, wherein the one or more lower reinforcing plies are embedded in rubber inside of a body of the coupling and the secondary liner is adhesively bonded to the body of the coupling by a sealing material that provides metal to rubber adhesion, and wherein the following inequality holds for the angle of lay of a lowest one of the one or more lower reinforcing plies of the hose:
tg2α1<[1−(Ds/D1)2]/2 where α1 is the angle of lay of the lowest one of the one or more lower reinforcing plies, Ds is the outside diameter of the internal stripwound tube, D1 is the mean diameter of the lowest one of the one or more lower reinforcing ply plies.