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Hydrogen storage tank and replacement method for on-off valve

A technology for storage containers and opening and closing valves, applied in container discharge methods, container filling methods, chemical instruments and methods, etc., can solve problems such as insufficient, air flowing into the main body of the container, and hydrogen storage alloys in contact with the air, etc.

Inactive Publication Date: 2007-09-26
TOYOTA IND CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, since the on-off valve is removed after the supply of the inert gas, until the on-off valve is replaced, air may flow into the container body due to leakage of the inert gas from the container body.
Therefore, there is still a risk that the hydrogen storage alloy in the container main body comes into contact with the air, and it is not sufficient as a method for preventing the oxidation of the hydrogen storage alloy and its accompanying deterioration.

Method used

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  • Hydrogen storage tank and replacement method for on-off valve
  • Hydrogen storage tank and replacement method for on-off valve
  • Hydrogen storage tank and replacement method for on-off valve

Examples

Experimental program
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no. 1 Embodiment approach

[0015] Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. 1 and 2 .

[0016] As shown in FIG. 1 , the hydrogen storage container 11 includes: a cylindrical (cylindrical in this embodiment) container body 12 ; and a heat exchanger 13 accommodated in the container body 12 . The container body 12 is formed by forming a fiber-reinforced resin layer 15 on the outer surface of a hollow liner 14 . The fiber-reinforced resin layer 15 covers substantially the entire area of ​​the outer surface of the liner 14 . Hydrogen gas is stored in the hydrogen storage container 11 at a pressure exceeding atmospheric pressure.

[0017] The inner liner 14 is formed of, for example, aluminum alloy, and ensures the airtightness of the hydrogen storage container 11 . Furthermore, the liner 14 is formed into a relatively elongated shape. The liner 14 is configured such that one end (base end), that is, the left end in FIG. 1 is divisible. That ...

no. 2 Embodiment approach

[0044] Next, a second embodiment that actualizes the present invention will be described with reference to FIG. 3 focusing on differences from the first embodiment described above.

[0045] In the present embodiment, the gas supply pipe 24 is provided on the joint 27 instead of the cover part 17 . That is, the hydrogen supply / release pipe 28 and the gas supply pipe 24 extend in parallel from the joint 27 . The on-off valves 26 and 30 provided in the two pipes 24 and 28 arranged in parallel are located in the vicinity of each other. In addition, this second embodiment is the same as the above-mentioned first embodiment in terms of the function of the hydrogen storage container 11 and the replacement procedure of the on-off valve 30 .

[0046] This embodiment has the following advantages in addition to the same advantages as the advantages (1), (3) to (6) of the first embodiment.

[0047] (7) The hydrogen supply / release pipe 28 and the gas supply pipe 24 are arranged in parall...

no. 3 Embodiment approach

[0050]Next, a third embodiment that actualizes the present invention will be described with reference to FIG. 4 focusing on differences from the first embodiment described above.

[0051] In the hydrogen storage container 40 of the present embodiment, the fiber-reinforced resin layer 15 is not formed on the outer surface of the inner liner 14 , and the container main body 12 is constituted only by the inner liner 14 . Furthermore, a gas supply pipe 24 is provided on the main body portion 14 a of the liner 14 . The gas supply pipe 24 is welded and fixed to the main body 14a while being inserted into a mounting hole formed through the outer peripheral wall of the main body 14a, thereby ensuring the airtightness of the container main body 12 . In addition, the gas supply pipe 24 is provided at a portion of the main body portion 14 a that is close to the cover portion 17 , and is spaced apart from the hydrogen supply / release pipe 28 . In addition, the third embodiment is the same...

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Abstract

The present invention provides a hydrogen storage tank (11) and a replacement method for an on-off valve, in which hydrogen occluding alloy (MH) received in a tank body (12) is prevented from being oxidized in the replacement of an on-off valve (30) connected to a hydrogen supply / discharge pipe (28) extending from the tank body (12). The hydrogen storage tank (11) has the tank body (12) in which the hydrogen occluding alloy (MH) is being received, the hydrogen supply / discharge pipe (28) to which the on-off valve (30) is connected, the on-off valve (30) being used to supply hydrogen gas to the tank body (12) and discharge hydrogen gas from the tank body (12), and a gas supply pipe (24) used to supply inert gas to the tank body (12) and provided independently of the hydrogen supply / discharge pipe (28). The method of replacing the on-off valve (30) connected to the hydrogen supply / discharge pipe (28) is such that inert gas is supplied from the gas supply pipe (24) to the tank body (12) and the on-off valve (30) is replaced in a state where the inert gas can be discharged from the supply / discharge pipe (28).

Description

technical field [0001] The present invention relates to a replacement method for a hydrogen storage container including a container body containing a hydrogen storage material, and an on-off valve for opening and closing a pipeline extending from the container body of the hydrogen storage container. Background technique [0002] In recent years, the awareness of suppressing global warming has been increasing, and especially for the purpose of reducing carbon dioxide emitted from vehicles, the development of hydrogen vehicles using hydrogen as fuel, such as fuel cell vehicles and hydrogen engine vehicles, has been actively developed. A hydrogen storage container for storing hydrogen gas is mounted on a hydrogen car. As a hydrogen storage container, for example, a container body in which a powdery hydrogen storage alloy is accommodated is known. [0003] In the hydrogen storage container disclosed in Patent Document 1, a hydrogen supply line and a hydrogen discharge line exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F17C11/00C01B3/00F17C13/04
CPCF17C2221/012F17C2203/0646Y10T29/49407F17C2227/0192F17C2205/0397Y10T29/49412F17C11/005F17C2203/0648Y10T29/49716Y02E60/321F17C2270/0184F17C2227/044Y02E60/327C01B3/0005Y10T29/4973F17C2203/067F17C2227/0379F17C2203/0617F17C2227/0309F17C2201/056F17C2203/0604F17C2260/015Y10T29/49721F17C2203/0619C01B3/0031F17C2201/0104Y02E60/32Y02P90/45
Inventor 藤敬司森大五郎
Owner TOYOTA IND CORP
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