JP2024070745A - Gas bottles - Google Patents

Abstract

To enable a joint part of a liner split body to be inspected from the inner side of a container liner and inhibit damage to a storage material.SOLUTION: A gas container has: a resin container liner 2 having an internal space 29; a storage material 5 which is stored and held in the internal space and occludes and discharges a filler gas; and two holding members 6 each of which is connected to each of two mouth rings 3 and disposed in the internal space and holds the storage material. The container liner is formed by joining two liner split bodies 20, which have a cylindrical shape and are arranged in the axial direction, integrally. Each holding member has: a shaft part 60 which extends in the axial direction and is hollow and whose interior communicates with an interior of the mouth ring; and restriction parts 65 each of which engages with the storage material to restrict position change of the storage material in the axial direction. The two holding members are spaced apart from each other in the axial direction. A joint part 21 of the two liner split bodies is located between the holding members in the axial direction.SELECTED DRAWING: Figure 4

Description

The present invention relates to a gas container for storing and releasing a gas, such as hydrogen gas.

In recent years, technologies have been proposed that use hydrogen gas, natural gas, and the like as fuel for vehicles and various devices. Gas containers for storing and releasing these gases have also been actively studied (for example, Patent Document 1).

The gas container introduced in Patent Document 1 accommodates a porous hydrogen storage material, which is a type of storage material, in its internal space.
The storage material physically or chemically absorbs and releases the gas to be stored (hereinafter, referred to as the filled gas, as necessary). By using these storage materials, the amount of gas that can be stored in the internal space can be increased.

A typical storage material undergoes a temperature change when absorbing and releasing a fill gas.
On the other hand, the storage capacity of the storage material depends on temperature, and it is known that the storage capacity is particularly excellent at low temperatures. For this reason, conventional gas containers are generally provided with a cooling function for cooling the storage material.

For example, Patent Document 1 introduces a technology in which a cooling pipe is provided in a gas container to cool the storage material contained in the internal space together with the cooling pipe.

JP 2008-75697 A

One type of gas container mentioned above is known to have a resin container liner.

A known method for manufacturing a resin container liner is to arrange multiple resin-molded short cylindrical liner segments in series in the axial direction of the container liner, and then join and integrate adjacent liner segments. Container liners manufactured by this method have a joint that extends around the entire circumference in part of the axial direction.

Some gas containers store flammable gases, such as hydrogen, as the filling gas. Since the resin container liner is a component with relatively low rigidity, it is important to prevent damage to the container liner and gas leakage in this type of gas container. For this reason, for example, in hydrogen tanks that store hydrogen, one of the inspection items is to inspect the above-mentioned joints from inside the container liner.

When storing storage materials and cooling pipes in the internal space, as in the technology introduced in the above-mentioned Patent Document 1, the above-mentioned joints are hidden by the storage materials and cooling pipes, making it very difficult to inspect the joints.
In view of the above, there is a need for a gas container capable of cooling a storage material, in which the joint between the liner segments can be inspected from inside the container liner.

Furthermore, some storage materials are relatively fragile. For example, if the gas container is for use in a vehicle, the storage material may be damaged by impacts while driving. There is also a demand for technology to prevent damage to such storage materials.

The present invention was made in consideration of the above circumstances, and aims to provide a gas container capable of cooling storage materials, in which the joints of the liner segments can be inspected from inside the container liner, and damage to the storage materials can be suppressed.

The gas container of the present invention which solves the above problems is
A resin container liner having an internal space;
two nozzles each having a higher rigidity than the container liner, attached to both ends of the container liner in the axial direction, and connecting the outside of the container liner with the internal space;
A storage material accommodated in the internal space for absorbing and releasing a fill gas;
two holding members connected to the two nozzles, respectively, and disposed in the internal space to hold the storage material;
The container liner is formed by joining together two cylindrical liner pieces arranged in the axial direction,
Each of the retaining members includes:
a shaft portion extending in the axial direction, being hollow and communicating with an interior of the base;
a restricting portion that protrudes from the shaft portion in a radial direction of the container liner and engages with the storage material to restrict a positional change of the storage material in the axial direction,
The two holding members are spaced apart from each other in the axial direction,
The joint between the two liner segments is a gas container located between the retaining members in the axial direction.

The gas container of the present invention is a gas container capable of cooling storage materials, the joints of the liner segments can be inspected from inside the container liner, and damage to the storage materials can be suppressed.

FIG. 1 is an explanatory diagram for explaining a gas container according to an embodiment of the present invention; FIG. 2 is an explanatory diagram for explaining a schematic exploded view of the gas container according to the embodiment. FIG. 2 is an explanatory diagram for explaining a typical holding member in the gas container according to the embodiment. FIG. 2 is an explanatory diagram showing a schematic axial cross section of the gas container according to the embodiment;

The gas container of the present invention has a resin container liner with an internal space, and a storage material that absorbs and releases the filled gas is contained in the internal space.

In the gas container of the present invention, the container liner is formed by joining two liner pieces together. Therefore, the container liner in the gas container of the present invention has a joint between the two liner pieces.

The gas container of the present invention also has two nozzles, each of which is connected to a holding member. The holding members are disposed in the internal space of the container liner and hold the storage material.

Each of the holding members has a shaft portion and a restricting portion.
The shaft portion extends in the axial direction of the container liner and is connected to the nozzle. The storage material and gas contained in the container liner can exchange heat with the shaft portion in the internal space of the container liner, and the shaft portion can exchange heat with the outside world via the nozzle. Therefore, the gas container of the present invention can be said to be a gas container capable of cooling the storage material.

The regulating portion protrudes from the shaft portion in the radial direction of the container liner. The regulating portion engages with the storage material to regulate the positional change of the storage material in the axial direction of the container liner. As a result, the gas container of the present invention is able to stably store and hold the storage material and prevent damage to the storage material.

The two nozzles are attached to both ends of the container liner in the axial direction, and the two retaining members are attached to each nozzle. In the gas container of the present invention, the two retaining members are spaced apart from each other in the axial direction of the container liner. In other words, a gap is formed between the two retaining members.

In the gas container of the present invention, the joint between the two liner segments is between the retaining members in the axial direction of the container liner. In other words, in the gas container of the present invention, the above-mentioned joint is not hidden at least by the retaining member. Therefore, in the gas container of the present invention, the joint between the liner segments can be inspected from the storage space side of the container liner, i.e., from inside the container liner.

Here, the shaft portion of the gas container of the present invention extends in the axial direction, is hollow, and its interior is connected to the interior of the nozzle. Therefore, the interior of the shaft portion functions as a passage for an inspection device, such as an endoscope. If an inspection device is inserted into the interior of the shaft portion from the nozzle and reaches between the two holding members, the joint between the liner segments can be directly imaged by the inspection device, making it possible to directly and non-destructively inspect the joint.

As described above, the gas container of the present invention is a gas container capable of cooling storage materials, the joints of the liner segments can be inspected from inside the container liner, and damage to the storage materials can be suppressed.

The gas container of the present invention will be described below with respect to each of its constituent elements.
Unless otherwise specified, the numerical range "x to y" described in this specification includes the lower limit x and the upper limit y. These upper and lower limit values, as well as the numerical values listed in the examples, can be arbitrarily combined to form a new numerical range. Furthermore, any numerical value selected from any of the above numerical ranges can be used as the upper and lower limit numerical values of the new numerical range.
In the following description, unless otherwise specified, the axial direction, radial direction, and circumferential direction refer to the axial direction, radial direction, and circumferential direction of the container liner.

The type of gas to be filled in the gas container of the present invention is not particularly limited, and the pressure of the gas in the gas container is also not particularly limited, but the gas container of the present invention is particularly suitable for use as a pressure-resistant container filled with flammable gases such as hydrogen gas and natural gas at high pressure.

The gas container of the present invention has a container liner, two nozzles, a storage material, and two retaining members.

Of these, the container liner has an internal space for containing the target filled gas. Since such a container liner is the part that comes into direct contact with the filled gas, it is preferable to select a material for the container liner that has so-called gas barrier properties, that is, a material that is difficult for the filled gas to permeate.

Specifically, the material of the container liner can be selected appropriately depending on the type of filled gas and the environment in which the gas container will be installed.

For example, if the filled gas is hydrogen gas, it is preferable to use polyethylene resin, polypropylene resin, or the like as the material for the container liner. It is also preferable to coat the inside of the container liner with a material with excellent gas barrier properties, such as ethylene-vinyl alcohol polymer (EVOH).

The container liner is made by joining two liner segments together. The liner segments are cylindrical and arranged in the axial direction. The two liner segments may be the same shape and be arranged symmetrically with respect to the joint, or they may be different shapes. Considering manufacturing costs, it is preferable that the two liner segments be the same shape.

There are no particular limitations on the method for joining the liner sections together, and any commonly used joining method, such as gluing or welding, may be appropriately selected depending on the intended use of the gas container.

The shape of the container liner is not particularly limited, but it is preferably a bottomed or bottomless tube that can form an internal space. In addition, since the nozzles are attached to both axial ends of the container liner, it is preferable that the container liner has a symmetrical shape on both axial ends. Furthermore, it is also preferable that the container liner has a shape that uniformly distributes the internal pressure caused by the filled gas, such as a cylindrical shape or a regular polygonal cylindrical shape.

The two nozzles are attached to both ends of the container liner, in other words, to one end of each liner section.

The liner portion may be integrally formed with the nozzle, or may be formed separately from the nozzle.
For example, the liner portion may be insert-molded using a preformed nozzle as an insert, or the nozzle may be attached to the liner portion by inserting the nozzle into the preformed liner portion.
In order to prevent leakage of the filled gas to the outside of the container liner, it is preferable to interpose a sealing member such as an O-ring between the mouthpiece and the container liner.

The material of the nozzle is not particularly limited, but since the nozzle is required to have higher rigidity than the container liner, it is particularly preferable to select a metal material such as aluminum, an aluminum alloy, or stainless steel as the material for the nozzle.

The mouthpiece connects the outside of the container liner with the internal space provided in the container liner, and functions as an inlet and outlet for the fill gas.
In the gas container of the present invention, both of the two mouthpieces may be used as inlets and outlets for the filled gas, or one of the mouthpieces may be plugged.

The gas container of the present invention may have a reinforcing part. The reinforcing part is a part of the gas container that covers the container liner from the outside, and the gas container of the present invention having the reinforcing part is suitably used as a pressure-resistant container.
In order to reinforce the container liner, the reinforcing portion is preferably more rigid than the container liner, and the thickness of the reinforcing portion is preferably greater than the thickness of the container liner at least at the axial end portion.

The reinforcing section may be made of high-strength fiber impregnated with resin (so-called FRP), similar to general pressure-resistant containers. Examples of high-strength fiber include carbon fiber, glass fiber, and aramid fiber, and examples of resin impregnated into the high-strength fiber include thermosetting resins such as epoxy resin, unsaturated polyester resin, and vinyl ester resin.

A common method may be used to form the reinforcing portion. For example, a method may be used in which high-strength fibers impregnated with a resin material are wound around the container liner to form a helical layer or hoop layer, and the resin material is then heated and cured. Alternatively, a method may be used in which the helical layer or hoop layer made of resin and high-strength fibers is formed into a sheet shape, attached to the container liner, and the resin material is then heated and cured.

The storage material is contained in the storage space and held by a holding member, which will be described later. The storage material only needs to absorb and release the fill gas, and the storage material may be appropriately selected according to the type of fill gas to be stored in the gas container of the present invention.

For example, when the filled gas is hydrogen, it is preferable to use, as the storage material, a porous carbon material such as vapor grown carbon fiber (so-called carbon nanotube), carbon black, or activated carbon.
In addition, as described in, for example, Patent Document 1, it is also preferable to use these porous carbon materials as storage materials after activating them together with an alkali salt such as KOH, NaOH, or LiOH under an inert gas atmosphere.
In addition, it is also suitable to use porous metal complexes (so-called MOFs), zeolites, hydrogen storage alloys, metal hydrides, and the like as storage materials.

The storage material can have various shapes. In order to fully utilize the storage material's ability to absorb and release the charged gas, it is preferable to increase the contact area of the storage material with the charged gas, and it is preferable to use a storage material made of primary particles and/or secondary particles with a large specific surface area. Note that the primary particles and secondary particles are not limited in shape, and the storage material may be in the form of short or long fibers.

Considering the ease of handling of the storage material and thus the gas container of the present invention, it is preferable to crosslink the storage material of primary particles and/or secondary particles with a crosslinking agent or bind them with a binder to form them into pellets.
The shape of the pellets is preferably a shape that fits the storage space that stores the pellets, and is particularly preferably a shape that avoids the holding member that is stored in the storage space together with the storage material.
As described below, when the storage material is sandwiched between the restricting portion of the holding member and the mouthpiece, the storage material is preferably in a solid or bulk state.

As described above, the two holding members are connected to the two nozzles one by one and are placed in the internal space to hold the storage material. The two holding members may have the same shape or different shapes. The holding member has a shaft portion and a restricting portion.

The shaft portion of the holding member is hollow and is connected to the nozzle and extends in the axial direction of the container liner. The connection mechanism between the nozzle and the shaft portion is not particularly limited, and it is sufficient that they communicate with each other so that the inside of the nozzle and the inside of the shaft portion can function as a passage for the inspection equipment. The connection mechanism between the nozzle and the shaft portion can be achieved by various methods, such as adhesive bonding, welding, screwing, and bolting.

The material of the shaft portion is not particularly limited. However, for the convenience of heat exchange with the storage material and gas contained in the internal space of the container liner, it is preferable to use a material with high thermal conductivity for the shaft portion, and it is particularly preferable to use a metal material such as stainless steel or aluminum. The material of the nozzle and the material of the shaft portion may be different, but considering corrosion resistance, it is preferable to select a material with no potential difference, and it is particularly preferable to use the same material.

The restricting portion protrudes from the shaft portion in the radial direction of the container liner. Therefore, it may be said that the outer diameter of the restricting portion is larger than the outer diameter of the shaft portion.
The restricting portion may be formed integrally with the shaft portion, or may be separate from the shaft portion and attached to the shaft portion. The material of the restricting portion may be the same as or different from the material of the shaft portion. If the shaft portion and the restricting portion are made of metal, it is preferable to select materials that have no potential difference as the material of the shaft portion and the material of the restricting portion, and it is particularly preferable to use the same material.

The regulating portion may be shaped so as to protrude from the shaft portion in the radial direction of the container liner and engage with the storage material to regulate the positional change of the storage material in the axial direction.

For example, the restricting portion may be a protrusion that protrudes in the radial direction of the shaft portion.
The protruding height of the protruding restricting portion is not particularly limited as long as it can restrict the positional change of the storage material in the axial direction by engaging with the storage material.

When the restricting portion is in the form of a protrusion, the position of the restricting portion in the axial direction of the shaft portion is not particularly limited and may be located at any position. For example, the restricting portion may be located at the end of the shaft portion facing the internal space, in other words, the end of the shaft portion facing the other holding member, or at the end of the shaft portion facing the nozzle, or in a position between these.

The number of protruding regulating parts is not particularly limited, and may be one or more, but in order to stably hold the storage material, it is preferable that the protruding regulating parts are located at multiple points along the circumferential direction of the shaft part.

Also, for example, the restricting portion may be in the form of a plate that protrudes in the radial direction of the shaft portion. The plate-shaped restricting portion is preferably attached, for example, to the end portion of the shaft portion facing the internal space, and engages with the axial end face of the storage material, in other words, the end face of the storage material held by the holding member facing the other holding member. In this case, the storage material is sandwiched between the restricting portion and the nozzle, and is therefore more stably held by the holding member.

The restricting portion may have holes, openings, grooves, etc. that serve as flow paths for the fill gas. It is particularly preferable to provide such holes, openings, grooves, etc. when the restricting portion is plate-shaped, but they may also be provided when the restricting portion is protruding.

It is preferable that the holding member further has a rotation prevention portion that protrudes axially from the regulating portion and engages with the storage material to regulate the positional change of the storage material in the circumferential and/or radial directions of the container liner. When the holding member has multiple regulating portions, the rotation prevention portion may be provided only on some of the multiple regulating portions, or may be provided on all of the regulating portions.

The anti-rotation portion may protrude in the axial direction, but in order to more stably hold the storage material by the holding member, it is more preferable for the anti-rotation portion to protrude in the axial direction toward the nozzle to which the holding member is connected.

When the restricting portion is plate-shaped, it is preferable that the anti-rotation portion be located at multiple points along the circumferential direction of the shaft portion.

In the gas container of the present invention, the two retaining members are spaced apart from each other in the axial direction. In other words, the two retaining members are arranged in the axial direction, and a gap is present between the two retaining members in the axial direction. The length of the axial gap between the two retaining members is not particularly limited, but it is sufficient that the joint between the liner segments is long enough to fit into the gap in the axial direction.

In the gas container of the present invention, the joint between the liner segments is arranged in the gap in the axial direction, so that the joint is not hidden by the holding member. Therefore, the joint can be easily inspected using an endoscope or the like inserted through the nozzle.

To make it easier to inspect the joint, it is advisable that not only the holding member but also the storage material be positioned to avoid the gap. Taking this into consideration, it is particularly preferable for the storage material to be sandwiched between the restricting portion of the holding member and the mouthpiece.

The gas container of the present invention will be explained below using specific examples.

(Example)
The gas container of the embodiment is a pressure-resistant container that is mounted on a vehicle and is used to store and release hydrogen gas, which is a type of fill gas.
Fig. 1 is an explanatory diagram for explaining a gas container of the embodiment. Fig. 2 is an explanatory diagram for explaining an exploded view of the gas container of the embodiment. Fig. 3 is an explanatory diagram for explaining a holding member of the gas container of the embodiment. Fig. 4 is an explanatory diagram for explaining an axial cross section of the gas container of the embodiment.
Hereinafter, the axial direction and the radial direction refer to the directions shown in each drawing. Also, the axial end portion and the axial center portion refer to the axial end portion and the axial center portion shown in FIG.

As shown in Figures 1 to 4, the gas container 1 of the embodiment has a container liner 2, two nozzles 3, a reinforcing portion 4, two storage materials 5, and two retaining members 6.

The container liner 2 is made of polyethylene resin and is a so-called resin liner that is roughly cylindrical with reduced diameters at both axial ends.

As shown in FIG. 2, the container liner 2 is made by welding two liner segments 20 of the same shape together. The two liner segments 20 are arranged in the axial direction. The joint 21 between the two liner segments 20 is located in the approximate center of the container liner 2 in the axial direction, and extends around the entire circumference of the container liner 2.

As shown in FIG. 4, each liner section 20 is generally short and cylindrical with a bottom, and the container liner 2 is also generally cylindrical with a bottom. An internal space 29 is formed inside the container liner 2.

The axial end of each liner section 20 is dome-shaped and has an opening in the center. A metal nozzle 3 is attached to each opening 22 via an O-ring 39.

A holding member 6 is connected to each of the two nozzles 3. Each holding member 6 is made of the same metal as the nozzles 3.

As shown in Figures 2 and 3, the two holding members 6 have a shaft portion 60, a restricting portion 65, a rotation prevention portion 70, and a fastening portion 75, and are of the same shape.

Of these, the shaft portion 60 extends in the axial direction. The base end portion 61, which is one end of the shaft portion 60, has a larger diameter than the restriction side end portion 62, which is the other end of the shaft portion 60, and than the general portion 63, which connects the base end portion 61 and the restriction side end portion 62. The restriction side end portion 62 has a slightly smaller diameter than the general portion 63. The shaft portion 60 is generally hollow and straight.

The outer diameter of the nozzle-side end 61 is approximately the same as the inner diameter of the end of the axial center portion of the nozzle 3. The nozzle-side end 61 of the shaft portion 60 is fixed to the corresponding nozzle 3 by a bolt (not shown). This connects the shaft portion 60 to the nozzle 3, and the inside of the shaft portion 60 is connected to the inside of the nozzle 3.

The shaft portion 60 and the nozzle 3 are made of metal with high thermal conductivity, so they function as a heat exchanger that exchanges heat with the storage material 5 and gas (not shown) in the internal space 29 (Figure 4) of the container liner 2. This provides the gas container 1 of the embodiment with a cooling function.

2 and 3, the restriction side end portion 62 has a variable diameter shape having a region with a different radial length in a part of its circumferential direction. More specifically, the radial cross section of the restriction side end portion 62 has a substantially D-shape.
Although not shown, a screw thread is formed on the outer circumferential surface of the restriction side end portion 62 .

The restricting portion 65 is generally disk-shaped and has a plurality of openings 65O arranged in the circumferential direction. Therefore, the restricting portion 65 can be said to be generally wheel-shaped.
An attachment opening 65m is provided in the center of the restriction portion 65. The outer edge of the attachment opening 65m has substantially the same shape as the outer diameter of the restriction side end portion 62, and its radial cross section is substantially D-shaped.

The restricting end 62 is inserted into the mounting opening 65m. The mounting opening 65m and the restricting end 62 have corresponding different diameter shapes, so that the relative positional changes between the shaft portion 60 and the restricting portion 65 in the radial and circumferential directions are restricted.

The fastening portion 75 is generally nut-shaped. The fastening portion 75 has a thread groove (not shown) that corresponds to the thread of the restricting portion 65, and the fastening portion 75 and the restricting portion 65 are screwed together. This fixes the restricting portion 65 and the shaft portion 60, and restricts the relative positional change between the restricting portion 65 and the shaft portion 60 in the axial direction.

The anti-rotation portion 70 is provided on the restricting portion 65 and protrudes from the restricting portion 65 in the axial direction.
More specifically, the gas container 1 of the first embodiment has a plurality of anti-rotation portions 70. The anti-rotation portions 70 are arranged along the circumferential direction of the restricting portion 65 and the shaft portion 60 at the radially outer portion of the restricting portion 65 and are spaced apart from one another. Each anti-rotation portion 70 protrudes in the axial direction toward the nozzle side end portion 61 of the shaft portion 60, in other words, toward the nozzle 3 side.

As shown in FIG. 2, the two storage materials 5 are in the form of pellets of approximately the same shape.
Specifically, the outer shape of each storage material 5 is shaped to fit the internal space 29 of the container liner 2 .
Each storage material 5 has a hollow portion 51 shaped to follow the outer shape of the corresponding shaft portion 60. Therefore, each storage material 5 has a substantially cylindrical shape.
Each storage material 5 is sandwiched between the nozzle 3 and the restricting portion 65. A recess 52 is provided on the axial end face of each storage material 5 at a position corresponding to the anti-rotation portion 70 on the axial center side. The anti-rotation portion 70 fits into the recess 52 and engages with the storage material 5. This restricts the positional change of the storage material 5 in the radial and circumferential directions.

The storage material 5 and the holding member 6 are housed in the internal space 29 of the container liner 2. A portion of the mouthpiece 3 is also housed in the internal space 29 of the container liner 2.
The container liner 2 is covered from the outside with a reinforcing part 4 made of FPR.

The method for manufacturing the gas container 1 of the embodiment is described below.

First, the two liner segments 20 that make up the container liner 2 were each injection molded, and a nozzle 3 was attached to each of the openings 22 of the two liner segments 20 together with an O-ring 39. The shaft portion 60 of the holding member 6 was connected to the nozzle 3.

A storage material 5 was inserted into each liner section 20. At this time, the shaft section 60 was inserted into the hollow section 51 of the storage material 5. The regulating section 65 was inserted into the regulating side end section 62 of the shaft section 60. At this time, the anti-rotation section 70 of the regulating section 65 was inserted into the recessed section 52 of the storage material 5. Furthermore, by attaching the fastening section 75 to the regulating side end section 62 of the shaft section 60, two integrated components of the liner section 20, the nozzle 3, the storage material 5, and the holding member 6 were obtained.

The two integrated parts described above were arranged symmetrically in the axial direction. The ends of the two liner segments 20 at the axial center were then welded together. This resulted in a container liner 2 in which the two liner segments 20 were joined. A joint 21 was formed in the approximate axial center of the container liner 2, extending around the entire circumference.

An FRP reinforcing section 4 was formed on the surface of the container liner 2 obtained as described above, and the gas container 1 of the embodiment was obtained.

In the gas container 1 of the embodiment, a storage material 5 and a holding member 6 are accommodated in the internal space 29 of the container liner 2 .
As shown in FIG. 4 , the two holding members 6 are spaced apart from each other in the axial direction, and the joint portion 21 between the liner segments 20 of the container liner 2 is located between the holding members 6 in the axial direction.

Furthermore, in the gas container 1 of the embodiment, the storage materials 5 held by each holding member 6 and sandwiched between the mouthpiece 3 and the restricting portion 65 are also spaced apart from each other in the axial direction. Therefore, an area is formed in the axial center of the internal space 29 of the container liner 2 where neither the holding member 6 nor the storage material 5 is present. The joint 21 of the container liner 2 is located in this area.
In other words, the joint 21 is exposed to the internal space 29 of the container liner 2 without being hidden by the retaining member 6 or the storage material 5 .

The inside of the shaft portion 60 of the holding member 6 is connected to the inside of the nozzle 3, so an inspection device inserted through the nozzle 3 passes through the inside of the shaft portion 60, passes through the axial end of the shaft portion 60, and emerges between the two holding members 6. Because the joint 21 is exposed between the two holding members 6, the joint 21 can be easily imaged by the inspection device, making it possible to easily inspect the condition of the joint 21.

As described above, according to the gas container 1 of the embodiment, since the storage material 5 can be cooled by the shaft portion 60 and the nozzle 3, the performance of the gas container 1 in storing and releasing the filled gas is improved.
Furthermore, according to the gas container 1 of the embodiment, the joint 21 of the liner section 20 can be easily inspected from inside the container liner 2, so that the manufacturing efficiency of the gas container 1 is improved.
Furthermore, according to the gas container 1 of the embodiment, the restricting portion 65 and the anti-rotation portion 70 restrict the positional change of the storage material 5 in the axial, radial and circumferential directions, so that the storage material 5 can be stably accommodated and held in the internal space 29 of the container liner 2. This makes it possible to suppress damage to the storage material 5.

Although the present invention has been described above, the present invention is not limited to the above-described embodiments, and it is possible to implement the present invention by appropriately extracting and combining elements described in the embodiments, and to make various modifications without departing from the spirit of the present invention.
Furthermore, the specification of the present invention discloses not only the citation relationships of each claim at the time of the initial application, but also a technical idea that appropriately combines the matters described in each claim.

1: Gas container 2: Container liner 20: Liner section 21: Joint section 29: Internal space 3: Cap 4: Reinforcement section 5: Storage material 6: Holding member 60: Shaft section 65: Regulating section 70: Anti-rotation section

Claims (3)

A resin container liner having an internal space;
two nozzles each having a higher rigidity than the container liner, attached to both ends of the container liner in the axial direction, and connecting the outside of the container liner with the internal space;
A storage material accommodated in the internal space for absorbing and releasing a fill gas;
two holding members connected to the two nozzles, respectively, and disposed in the internal space to hold the storage material;
The container liner is formed by joining together two cylindrical liner pieces arranged in the axial direction,
Each of the retaining members includes:
a shaft portion extending in the axial direction, being hollow and communicating with an interior of the base;
a restricting portion that protrudes from the shaft portion in a radial direction of the container liner and engages with the storage material to restrict a positional change of the storage material in the axial direction,
The two holding members are spaced apart from each other in the axial direction,
A gas container, wherein a joint portion of the two liner segments is located between the retaining members in the axial direction. The regulating portion is
The plate is attached to an end of the shaft portion on the side of the internal space, and has a larger diameter than the shaft portion.
The gas container according to claim 1 , wherein the storage material is sandwiched between the nozzle and the gas container. The gas container according to claim 1 or 2, wherein the holding member further has a rotation prevention portion that protrudes from the regulating portion in the axial direction and engages with the storage material to regulate the positional change of the storage material in the circumferential direction and/or the radial direction of the container liner.

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