JP2006300138A - High-pressure gas storage vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-pressure gas storage vessel enabling an increase in pressure resistance by uniformizing a pressure distribution on a liner by a reinforcement layer on a vessel shoulder part. <P>SOLUTION: This high-pressure gas storage vessel 1 comprises the liner 2 and the reinforcement layer 4 formed by wrapping a band-like reinforcement member 3 around the surface of the liner 2. A pressure transmission member 8 formed by sealing a pressure transmission medium 6 formed of a liquid, an oil, or a gel-like medium in a bag 7 is installed between the liner 2 on the vessel shoulder part 1C and the corresponding reinforcement layer 4. Further, the bag 7 forming the pressure transmission member 8 is so formed that its portion 7A in contact with the reinforcement layer 4 is formed of a high-strength material of such a degree that cannot be broken by the holding force of the reinforcement layer 4 and its portion 7B in contact with the liner 2 is brought into contact uniformly with the liner 2 and formed of a low-strength material of such a degree that the pressure transmission medium 6 therein does not leak. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a high-pressure gas storage container for filling and storing various gases, and in particular, to a technique for achieving a uniform pressure distribution in the container shoulder where the internal pressure is higher than that of other parts.

For example, as a gas storage container for storing gas, a belt-like carbon fiber is wound around the circumferential surface of a tank-shaped liner to increase the mechanical strength (pressure resistance) of the container, and this is used as a reinforcing layer. A pressure vessel has been proposed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-231997

  By the way, in the pressure vessel described in Patent Document 1, the pressure resistance is ensured by winding the carbon fiber directly around the liner. A hoop winding is performed on the body of the liner to wrap a plurality of carbon fibers in the circumferential direction of the body, and a mirror winding including the shoulder of the liner is a helical winding that wraps the carbon fibers on the diagonal in the longitudinal direction of the container. It is carried out.

  As described above, since the hoop winding and the helical winding are performed differently on the liner with respect to the liner, the number of carbon fibers stacked on the container shoulder is smaller than the number of carbon fibers stacked on other portions. . In particular, in the container shoulder portion having a curvature shape, the winding number of the carbon fiber varies depending on the position due to the helical winding. In addition, the density of the epoxy resin (adhesive) for holding the carbon fibers also varies.

  Therefore, when an internal pressure is applied to the liner, the pressure distribution in the container shoulder is not uniformly uniform, and the surface pressure distribution varies, for example, there is a portion where the internal pressure is locally high. A crack is generated at a site where the internal stress is locally high, and the life of the container may be shortened.

  Then, an object of this invention is to provide the high pressure gas storage container which can make pressure distribution to the liner by the reinforcement layer in a container shoulder part uniform, and can improve a pressure | voltage resistant performance.

  The high-pressure gas storage container according to the present invention includes a liner and a reinforcing layer formed by winding a belt-shaped reinforcing member around the peripheral surface of the liner, and further, a pressure is applied between the liner and the reinforcing layer on the container shoulder. A transmission member is provided.

  According to the high pressure gas storage container of the present invention, since the pressure transmission member is provided between the liner at the shoulder portion of the container and the reinforcing layer, the pressing force to the liner by the reinforcing layer is made uniform by the pressure transmitting member, The uneven pressure distribution on the liner due to the thickness of the reinforcing layer varying depending on the position of the container shoulder becomes uniform at all positions of the container shoulder.

  Therefore, according to the present invention, the pressure on the liner by the reinforcing layer at the container shoulder where the thickness of the reinforcing layer varies can be made uniform. Cracks can be prevented, pressure resistance can be improved, and container life can be extended.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  1 is a perspective view of a high-pressure gas storage container according to the present embodiment, FIG. 2 is an enlarged cross-sectional view of a main part taken along line AA of FIG. 1, and FIG. 3 is a belt-shaped reinforcing member wound around a liner to form a reinforcing layer. FIG. 4 is an enlarged cross-sectional view of a main part of a container shoulder portion.

  As shown in FIGS. 1 to 3, the high-pressure gas storage container 1 of the present embodiment includes a cylindrical liner 2 and a reinforcing layer 4 formed by winding a belt-shaped reinforcing member 3 around the peripheral surface of the liner 2. Consists of. The high-pressure gas storage container 1 is filled and stored with a gas such as hydrogen gas.

  The liner 2 is formed as a container (tank) having a bottomed cylindrical shape having a base 5 at one end. Such a liner 2 may be made of a synthetic resin or a metal. As the synthetic resin, for example, polyethylene, polypropylene, ABS, polyamide, polycarbonate, or a mixture of these with reinforcing fibers can be used. An aluminum alloy or the like is used as the metal.

  The reinforcing layer 4 is formed by winding a predetermined number of belt-shaped reinforcing members 3 around the peripheral surface of the liner 2 and serves to ensure the physical strength (pressure resistance) of the liner 2. The body 1A excluding both ends in the longitudinal direction of the liner 2 is hoop-wrapped to wind the reinforcing member 3 in the circumferential direction, and the reinforcing member 3 is placed diagonally on the mirror 1B at both ends in the container longitudinal direction. Helical winding is performed.

  For the reinforcing member 3, for example, CFRP (Fiber Reinforced Plastics), which is a fiber reinforced plastic using carbon fibers as reinforcing fibers, is used. Further, when the reinforcing member 3 is wound, an epoxy resin is impregnated for the purpose of holding the reinforcing members 3 together.

  When the reinforcing member 3 is wound around the cylindrical liner 2 by different winding methods such as hoop winding and helical winding, the mirror portion 1B is hung from the body 1A to the base 5 or from the body 1A to the bottom. In the shoulder portion 1 </ b> C that is bent and curved, the thickness of the reinforcing layer 4 varies due to the difference in the number of windings of the reinforcing member 3 depending on the position. The variation in the thickness of the reinforcing layer 4 induces unevenness of the pressing force (holding force) of the shoulder portion 1C against the liner 2.

  Therefore, in the present embodiment, the liner 2 of the shoulder portion 1C and the reinforcing layer of the portion corresponding thereto are improved in order to improve the pressure resistance performance by making the pressing pressure against the liner 2 by the reinforcing layer 4 at the container shoulder portion 1C uniform. 4, a pressure transmission member 8 in which a pressure transmission medium 6 is enclosed in a bag 7 is provided. In FIG. 2, the pressure transmission member 8 is arranged on the shoulder 1 </ b> C on the base 5 side, but the pressure transmission member 8 is also arranged on the shoulder on the container bottom side.

  As the pressure transmission medium 6, for example, a medium made of a liquid such as water, an oil, or a gel-like medium is used. Examples of the oil and gel medium include high viscosity water, high viscosity polymer oil, high viscosity silicone oil, urethane gel, grease, gelatin and the like. The bag 7 accommodates the pressure transmission medium 6 therein and is sealed so as not to leak liquid. The bag 7 is formed of two kinds of materials, and the portion 7A that contacts the reinforcing layer 4 is formed of a high-strength material that is not broken by the holding force of the reinforcing layer 4, and the portion 7B that contacts the liner 2 is The material is made of a low-strength material that is in uniform contact with the liner 2 and does not leak the internal pressure transmission medium 6.

  As the high-strength material, since a strong pressing force from the reinforcing layer 4 is applied, a highly rigid stainless steel, aluminum alloy, or the like that can withstand it is used. As the low-strength material, a polymer film (polyvinyl chloride or the like) that is thin enough to prevent the pressure transmission medium 6 from leaking is used so that the pressure transmission medium 6 itself contacts the liner 2 as much as possible.

  In addition, the pressure transmission medium 6 in the bag 7 leaks to the outside at the interface between the portion 7A formed from the high-strength material and the portion 7B formed from the low-strength material, which is a joint between the two types of bags 7 having different strengths. A sealing member 9 is provided to prevent the sticking out.

  According to the high-pressure gas storage container 1 of the present embodiment configured as described above, the pressure transmission medium 6 is placed in the bag 7 between the liner 2 of the container shoulder 1C and the reinforcing layer 4 corresponding thereto. Since the pressure transmission member 8 enclosed in the container is provided, a large or small pressing force F1 (the size of the pressing force is indicated by the size of the arrow) generated by the difference in thickness of the reinforcing layer 4 depending on the position of the shoulder 1C. The pressure is uniformized by the Pascal principle by the pressure transmission medium 6 such as the liquid enclosed in the bag 7, and the non-uniform pressure distribution on the liner 2 is uniform at all positions of the shoulder 1C. The pressing force F2 against the liner 2 of the pressure transmission member 8 is indicated by an arrow having the same size.

  Therefore, according to the present embodiment, the pressure (holding force) on the liner 2 by the reinforcing layer 4 at the container shoulder 1C where the thickness of the reinforcing layer 4 varies can be made uniform. Arbitrary portions can be locally increased to prevent the liner 2 from cracking, the pressure resistance can be improved, and the container life can be extended.

  Moreover, according to this Embodiment, since the site | part 7A which contact | connects the reinforcement layer 4 is formed with a high intensity | strength material among the bags 7 which comprise the pressure transmission member 8, the strong pressing force from this reinforcement layer 4 is received. Even if it is hung, it does not break, and the portion 7B that contacts the liner 2 of the bag 7 is made of a low-strength material, so that it follows the curved surface (R surface) of the liner 2 and makes the surface pressure uniform. However, the pressing force from the reinforcing layer 4 can be transmitted. In addition, the pressure transmission member 8 can follow the liner 2 that is deformed as the gas fuel is charged / discharged while ensuring uniform surface pressure.

  Moreover, according to this Embodiment, the sealing member 9 is provided in the interface of the site | part 7A formed from the high intensity | strength material from which two types of strengths which comprise the bag 7 differ, and the site | part 7B formed from a low strength material. However, since the pressing force from the reinforcing layer 4 is applied to the seal member 9, the seal structure of the seal member 9 can be simplified.

  Further, according to the present embodiment, since the liquid, oil, or gel-like medium is used for the pressure transmission member 8, the pressure on the liner 2 caused by the variation in the thickness of the reinforcing layer 4 in the shoulder 1C due to the Pascal principle. The distribution can be made uniform.

  In addition, according to the present embodiment, it is possible to provide the high-pressure gas storage container 1 that satisfies different required specifications by properly using the type of liquid, oil, or gel medium sealed in the bag 7. . Specifically, when it is desired to prevent temperature transmission to the reinforcing layer 4, the pressure transmission medium 6 can act as a heat insulating member by using a medium having a small heat capacity. When it is desired to positively lower the temperature rise in the container, the gas temperature in the container can be lowered by using a heat absorbing medium.

  Although specific embodiments to which the present invention is applied have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made.

  For example, in the above-described embodiment, the pressure transmission medium 6 is sealed in the bag 7 made of different materials on the liner 2 side and the reinforcing layer 4 side. However, the pressure transmission medium 6 is prevented from leaking. In this case, the portion 7B formed from the low-strength material on the side that is in close contact with the liner 2 side may be omitted.

It is a perspective view of the high pressure gas storage container of this embodiment. It is a principal part expanded sectional view in the AA line of FIG. It is a figure which shows the winding pattern for winding a strip | belt-shaped reinforcement member around a liner and forming a reinforcement layer. It is a principal part expanded sectional view of a container shoulder part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... High pressure gas storage container 2 ... Liner 3 ... Reinforcement member 4 ... Reinforcement layer 5 ... Base 6 ... Pressure transmission medium 7 ... Bag 8 ... Pressure transmission member 9 ... Sealing member 1A ... Body 1B ... Mirror part 1C ... Shoulder part

Claims (4)

In a high-pressure gas storage container comprising a liner and a reinforcing layer formed by winding a belt-shaped reinforcing member around the peripheral surface of the liner,
A pressure transmission member is provided between the liner at the shoulder portion of the container and the reinforcing layer. The high-pressure gas storage container according to claim 1,
Of the pressure transmission member, the portion in contact with the reinforcing layer is formed of a high-strength material that is not broken by the holding force of the reinforcing layer, and the portion in contact with the liner is in uniform contact with the liner and has an internal pressure. A high-pressure gas storage container formed of a low-strength material that does not leak the transmission medium. The high-pressure gas storage container according to claim 2,
A high-pressure gas storage container, wherein a seal member is provided at an interface between a portion formed from a high-strength material and a portion formed from a low-strength material. The high-pressure gas storage container according to claim 2 or 3,
The pressure transmission medium is made of a liquid, oil, or gel medium.