Method for determining specification of metal wire for hose, and hose

A technology for metal wires and hoses, applied in the direction of hoses, pipes/pipe joints/fittings, pipes, etc., to achieve the effect of improving pressure resistance and durability

Pending Publication Date: 2022-07-29
THE YOKOHAMA RUBBER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the fatigue test of a single metal wire takes time and effort, there is room for improvement in terms of simply selecting a metal wire of an appropriate specification that can effectively improve the pressure durability of the hose

Method used

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  • Method for determining specification of metal wire for hose, and hose
  • Method for determining specification of metal wire for hose, and hose
  • Method for determining specification of metal wire for hose, and hose

Examples

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Embodiment Construction

[0028] Hereinafter, the specification determination method and the hose of the wire for hoses of this invention are demonstrated based on embodiment shown in drawing.

[0029] figure 1 , figure 2 The illustrated embodiment of the hose 1 of the present invention is used as a so-called hydraulic hose or a hose for an air conditioner that circulates a refrigerant of an air conditioner for a vehicle. The hose use pressure is, for example, the hose 1 belonging to the category of high-pressure hoses of 15 MPa or more and 50 MPa or less. The hose outer diameter is, for example, 20 mm or more and 75 mm or less, and the hose inner diameter is, for example, 10 mm or more and 55 mm or less.

[0030] In this hose 1, the inner surface layer 2, the reinforcement layer 3 (3a, 3b, 3c, 3d) and the outer surface layer 5 are laminated|stacked coaxially in this order from the inner peripheral side. Furthermore, the interlayer rubber layer 6 is interposed between the reinforcing layers 3 stack...

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Abstract

Provided are: a method for determining the specification of a metal wire for a hose, the method being capable of easily selecting a metal wire of an appropriate specification that effectively improves the pressure resistance durability of the hose; and a hose provided with a reinforcement layer comprising a metal wire of an appropriate specification. On the basis of the ratio (Ta / Tx) of the 0.2% yield strength (Ta) to the maximum tensile stress (Tx) of a wire (4) that forms a reinforcing layer (3) of a spiral structure interposed between an inner surface layer (2) and an outer surface layer (5) of a hose (1), and on the basis of the results of a pressure endurance test in which internal pressure is repeatedly applied to the hose (1) under a predetermined internal pressure condition. An appropriate range (R) of a ratio (Ta / Tx) in which the results of the pressure endurance test satisfy a preset target value is ascertained, and a metal wire (4) having the specification of the ratio (Ta / Tx) of 0.85-0.99, which is the ascertained appropriate range (R), is selected as a member for forming the reinforcement layer (3) of the hose (1).

Description

technical field [0001] The present invention relates to a method for determining the specification of a metal wire for a hose, and a hose, and more specifically, to a metal wire for a hose which can easily select a metal wire of an appropriate specification for effectively improving the pressure resistance durability of the hose. A method of determining a wire specification, and a hose provided with a reinforcing layer formed of a metal wire of an appropriate specification. Background technique [0002] In hydraulic hoses, vehicle air-conditioning hoses, and the like, in order to withstand a high internal pressure, a reinforcing layer of a spiral structure formed by winding a metal wire in a spiral shape, for example, is interposed between the inner surface layer and the outer surface layer between. In order to evaluate the pressure resistance durability of the hose, a pressure durability test (impulse test) in which a predetermined internal pressure is repeatedly applied t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08F16L11/12
CPCF16L11/08F16L11/083F16L11/12
Inventor 末藤亮太郎
Owner THE YOKOHAMA RUBBER CO LTD
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