CRYOGENIC FLUID PUMPING HOSE Russian patent published in 2010 - IPC F16L39/02 F16L11/00 

FIELD: machine building.

SUBSTANCE: hose includes internal hose (10) at least with two sections (12, 13) connected to each other using at least two internal connection elements (16, 17; 30a, 30b; 72, 73) passing in transverse direction. Internal hose is flexible and includes flexible reinforced wall having inner diametre at least of 10 cm. External hose (11) enveloping internal hose contains water-proof elastomeric or composite material and includes at least two sections (20, 21) connected to each other by means of two external connection elements (24, 25). External hose has wall at least 2 cm thick, bending radius, at least 2 m and inner diametre of at least 20 cm. Internal hose is kept at some distance from external hose by means of a number of separating elements (28, 29) covering distance hi between outer wall of internal hose and oinner wall of external hose; at that, this distance is within 0.1 to 0.8 of inner diametre d_i0 of internal hose (10), and longitudinal position of a pair of internal connection elements (16, 17; 30a, 30b; 72, 73) is at the level of or close to longitudinal position of pair of external connection elements (24, 25). Internal connection elements (16, 17; 30a, 30b; 72, 73) cover distance h_i between walls of internal and external hoses and include flange section (16, 17, 72, 73) of internal hose wall, two transverse support surfaces (34, 35) on external hose wall; at that, flange sections (16, 17, 72, 73) are connected in a detachable way between support surfaces (34, 35) to prevent relative axial movement between segments of internal and external hoses (12, 13; 20, 21) at the level of or close to longitudinal position of pair of external and internal connection elements, in which flange sections (72, 73) can be detached from internal hose wall and/or support surfaces (34, 35) can be detached from wall of external hose so that at removal of flange sections (72, 73) and/or support surfaces (34, 35) from gap between internal hose (10) and external hose (11), all parts of wall of internal hose (10) are located at some distance from external hose (11) wall.

EFFECT: hose is extended when used in marine conditions.