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Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid

一种金属波纹管、高压流体的技术，应用在挠性管领域

Inactive Publication Date: 2005-10-12
ORK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] These problems are not only in the case of high-pressure hydrogen supply in hydrogen fuel cells, but also in the supply of other ultra-high pressure fluids.

Method used

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  • Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid
  • Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid
  • Metal bellows tube, method of producing the same, and flexible tube for high-pressure fluid

Examples

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Effect test

example 1

[0130] A stainless steel cylindrical pipe was formed into a corrugated base pipe (corrugation pitch: 2.5 mm) in which the cross-sectional shape of the ridges and recesses in the wall of the corrugated pipe was U-shaped by a continuous die forming method. Next, through the aforementioned second to fourth steps, a cross-section in which the cross-sectional shape of the ridges and recesses in the corrugated-shaped pipe wall is V-shaped is prepared.

[0131] The outer diameter is 9.3 mm, the inner diameter is 5.2 mm, the thickness of the corrugated pipe wall is 0.15 mm, the pitch of the corrugation is 0.5 mm (the number of ridges per 1 cm in the longitudinal direction of the pipe is: 20), the total The length is 30cm.

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Abstract

Cross sections of both a mountain (2) and a valley (3) of a bellows-like tube wall (1) of a metal bellows tube are made to a letter-V shape. This enables to provide a metal bellows tube with a much better bending fatigue resistance property than that available in conventional products. A flexible tube for a high-pressure fluid is structured from the metal bellows tube and a tube-like metal knitted body covering the outer side of the bellows tube. This makes it possible that a high-pressure fluid with a pressure exceeding 20 MPa can be, and particularly, even a very high-pressure fluid with a pressure of 70 MPa can be safely transported without allowing molecules of the fluid to permeate the tube.

Description

technical field [0001] The present invention relates to a metal bellows, a method of manufacturing the same, and a flexible pipe for high-pressure fluid using the bellows. The flexible tube for high-pressure fluid is used to supply or transmit high-pressure fluid for hydrogen fuel cells, such as high-pressure hydrogen gas. Background technique [0002] Since metal bellows are metal tubes that have corrugated walls and allow expansion / contraction, inflection and bending, they are used to absorb movable piping systems such as industrial equipment and installations, piping systems in steel mills, petroleum smelting, petroleum Displacement purposes such as thermal expansion / contraction, vibration, shock resistance, shock absorption, ground subsidence, etc. in chemical, power generation, and other core industries, etc. [0003] Metal bellows (hereinafter simply referred to as "bellows") are conventionally formed by arranging a plurality of disks extruded into a specific cross-se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D15/06F16L9/06F16L11/15
CPCF16L9/06F16L11/15B21D15/06F16L11/11
Inventor 小泉一夫
Owner ORK
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