Hydrogen filling hose

Abstract

Provided is a hydrogen-filled hose (1) capable of allowing high-pressure hydrogen gas to flow at a greater flow rate. The present invention is characterized by being provided with a reinforcing layer (3) coaxially laminated between an inner surface layer (2) and an outer surface layer (5), the inner surface layer (2) being formed from a thermoplastic resin having a dry hydrogen gas permeation coefficient of 1 * 10-8 cc * cm / cm2 * sec * cmHg or less at 90 DEG C, and the outer surface layer (5) being formed from a thermoplastic resin having a dry hydrogen gas permeation coefficient of 1 * 10-8 cc * cm / cm2 * sec * cmHg or less at 90 DEG C, the reinforcing layer (3) being laminated coaxially between the inner surface layer (2) and the outer surface layer (5). The diameter of a flow path (2a) formed by the inner surface layer (2) is 10-25 mm (inclusive), the number of the reinforcing layers (3) is 4-8 (inclusive), each reinforcing layer (3) has a spiral structure formed by helically winding a metal wire (4), and puncture holes (6) penetrating in the thickness direction are distributed in the outer surface layer (5), so that hydrogen gas h penetrating through the inner surface layer (2) can easily and smoothly flow out to the outside of the hose (1).

Description

technical field [0001] The present invention relates to a hydrogen-filling hose, and more specifically, to a hydrogen-filling hose capable of flowing high-pressure hydrogen gas at a larger flow rate. Background technique [0002] Various hoses for filling hydrogen gas for fuel cell vehicles and the like have been proposed (for example, refer to Patent Document 1). Hydrogen filling hoses are not only required to have excellent resistance to hydrogen gas permeation, but in recent years it has been desired to supply a larger amount of hydrogen gas from a dispenser to fuel cell vehicles and the like in a shorter period of time. [0003] Simply enlarging the inner diameter of the hose and increasing the flow rate of the high-pressure hydrogen gas in response to such a request reduces the breakdown pressure of the hose. Therefore, it is necessary to improve the pressure resistance performance of the hose. It is more advantageous to form the reinforcement layer of the hose with m...

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Problems solved by technology

[0004] On the other hand, as the inner diameter of the hose increases, the permeation amount of hydrogen gas increases. Therefore, when the reinforcement layer is formed of metal wires, there is a problem that the metal wires are prone to hydrogen embrittlement.

Therefore, there is room for improvement in hose construction for allowing high-pressure hydrogen to flow at a greater flow rate

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