Flexible hose structure with a interlaced reinforcement

摘要

A flexible hose structure includes at least one inner tubular layer of a first polymeric material defining a longitudinal axis, at least one meshed intermediate reinforcement layer arranged on the inner layer and having at least one first series of yarns defining first chained wales and first courses arranged according to a helical progression with a first pitch of predetermined length, and at least one second series of yarns defining second chained wales and second courses arranged according to a helical progression with a second pitch of predetermined length. The first pitch is a multiple of the second pitch, and the first wales (and the second wales are mutually interlaced with respective meshes not in a chain to exert an independent resistance to radial expansion on the inner layer.

主权项

1. A flexible hose structure, comprising:
at least one inner tubular layer (2) made of a first polymeric material defining a longitudinal axis (L); at least one intermediate meshed reinforcing layer (3) placed on said inner layer (2) and made of yarns in a fibrous material; and an optional outer tubular covering layer made of a second polymeric material, wherein said intermediate meshed reinforcing layer (3) comprises,
at least one first series of yarns (4) defining first chained wales (6, 6′, 6″, . . . ) and first courses (7, 7′, 7″, . . . ) with at least said first courses (7, 7′, 7″, . . . ) arranged with a helical pattern with a first pitch (P1) of predetermined length, andat least one second series of yarns (5) defining second chained wales (8, 8′, 8″, . . . ) and second courses (9, 9′, 9″, . . . ) with at least said second courses (9, 9′, 9″, . . . ) arranged with a helical pattern with a second pitch (P2) of predetermined length, and wherein said first pitch (P1) is a multiple of said second pitch (P2),and said first wales (6, 6′, 6″, . . . ) and said second wales (8, 8′, 8″, . . . ) are reciprocally interlaced with respective meshes (10, 10′, 10″, . . . : 11, 11′, 11″, . . . ) not mutually chained for independently exerting on said inner layer (2) a radial expansion strength.