pressure vessels

Abstract

The present invention provides a pressure vessel capable of improving reliability when the temperature drops. The pressure vessel comprises a gas containing portion (110), a valve, a sealing member, and a metal tubular member (140). The gas containing portion (110) is formed by a liner (111) made of synthetic resin and a fiber-reinforced resin layer (112) covering the outer surface of the liner (111), and has a neck (114) with an opening (113) formed at the front end. The valve has an insert portion that is inserted into the neck (114) from the opening (113) and forms a gas flow path that connects the internal space of the gas containing portion (110) with the external space. The sealing member seals between the neck (114) and the insert portion. The tubular member (140) is arranged between the liner (111) and the fiber-reinforced resin layer (112) at the neck (114) and is arranged around the sealing member. The tubular member (140) has anchoring portions (143, 144) embedded in the liner (111) and having an inner surface (141) and an outer surface (142) covered with the synthetic resin material of the liner (111).

Description

Technical Field

[0001] The present disclosure relates to pressure vessels. Background Art

[0002] In the past, there are known gas tanks that are filled with gases such as hydrogen at high pressure. Patent Document 1 below discloses a gas tank having a fiber-reinforced layer formed by stacking fibers by a fiber winding method on the outer peripheral side of an inner liner to which an interface member is attached. A ventilation layer having fine gaps between fibers is provided in the inner layer portion of the fiber-reinforced layer of this conventional gas tank (Patent Document 1, Abstract, Claim 1, Paragraph 0007, Figure 3 ).

[0003] According to this conventional gas tank, gas that has passed through the liner under high pressure does not remain between the liner and the fiber-reinforced layer. Instead, it is gradually released to the outside from the gap between the liner and the interface member via a ventilation layer formed by fine gaps between the fibers that make up the fiber-reinforced layer. This ensures sufficient strength compared to a case where grooves are formed in the fiber-reinforced layer, and prevents the high-concentration gas trapped between the liner and the fiber-reinforced layer from escaping to the outside in a short period of time. Furthermore, when the gas tank is depressurized, inward deformation of the liner due to the high-pressure gas between the liner and the fiber-reinforced layer is prevented (Patent Document 1, paragraph 0008).

[0004] In this conventional gas tank, the mouth of the liner has an inner extension portion and a cylindrical engaged portion, and the inner side of the engaged portion serves as the mouth. The inner extension portion is inclined and extended from the inner end edge of the shoulder of the liner toward the center axis side in a manner such that the closer it is to the smaller diameter side, the more it is located on the inner side of the liner. The cylindrical engaged portion protrudes into the liner along the axial direction of the liner from the side of the inner extension portion opposite to the shoulder. An embedding ring is integrally provided on the outer periphery of the engaged portion. The embedding ring tightens an O-ring installed between the engaged portion and the engaging portion of the interface member pressed into the engaged portion (Patent Document 1, paragraphs 0028 to 0029, Figure 2 ).

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2009-174700 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] In the conventional gas tank, as described above, the insert ring is integrally provided with the liner on the outer circumference of the cylindrical engagement portion, which forms part of the liner's mouth, tightening the O-ring installed between the liner's engagement portion and the engagement portion of the interface member. In this structure, when the temperature of the gas tank decreases, the synthetic resin liner and the metal insert ring contract together. Consequently, the difference in thermal expansion coefficient between the liner and the insert ring creates stress that can cause the liner to peel from the insert ring, potentially reducing the reliability of the gas tank.

[0010] The present disclosure provides a pressure vessel capable of improving reliability when the temperature drops.

[0011] Technical solutions to problems

[0012] One embodiment of the present disclosure is a pressure vessel, characterized in that it comprises: a gas containing portion having a liner made of synthetic resin and a fiber-reinforced resin layer covering the outer surface of the liner, and provided with a neck having an opening at the front end; a valve having an insertion portion inserted into the neck from the opening, and a gas flow path provided in the insertion portion and connecting the internal space of the gas containing portion with the external space; a sealing member that seals between the neck and the insertion portion; and a metal tubular member provided at the neck between the liner and the fiber-reinforced resin layer and arranged around the sealing member, the tubular member having an anchoring portion that is buried in the liner and has its inner and outer surfaces covered by the synthetic resin material of the liner.

[0013] In the pressure vessel according to the above aspect, the liner may include an expanded diameter portion having an increased outer diameter at a front end portion of the neck, and the anchor portion may be embedded in the expanded diameter portion of the liner and have an increased diameter closer to the front end of the neck.

[0014] In the pressure vessel of the above-mentioned embodiment, the gas containing portion may also have a shoulder portion, which is connected to the base end portion of the neck and is enlarged in diameter compared to the neck; the anchor portion is buried in the lining of the shoulder portion and is enlarged in diameter as it moves away from the neck; and the inclination angle of the outer surface of the anchor portion relative to the central axis of the neck is smaller than the inclination angle of the outer surface of the lining of the shoulder portion relative to the central axis.

[0015] In the pressure vessel according to the above aspect, the liner may include an expanded diameter portion having an increased outer diameter at a front end portion of the neck portion, and the anchor portion may be embedded in the expanded diameter portion of the liner and include a through hole radially penetrating the tubular member.

[0016] In the pressure vessel of the above aspect, the anchor portion may have an inclined surface that forms an acute angle with the inner surface and an obtuse angle with the outer surface, and the inner surface and the inclined surface are covered with the synthetic resin material of the liner.

[0017] Effects of the Invention

[0018] According to the above-described aspect of the present disclosure, it is possible to provide a pressure vessel capable of improving reliability when the temperature drops. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view showing a first embodiment of the pressure vessel according to the present disclosure.

[0020] Figure 2 yes Figure 1 An enlarged cross-sectional view of the neck of the gas receiving portion of the pressure vessel is shown.

[0021] Figure 3 It is an explanation Figure 2 A cross-sectional view illustrating a method for manufacturing a liner of a gas containing portion is shown.

[0022] Figure 4 This is a diagram showing the second embodiment of the pressure vessel according to the present disclosure. Figure 2 An enlarged cross-sectional view of .

[0023] Figure 5 It is an explanation Figure 4 A cross-sectional view illustrating a method for manufacturing a liner of a gas containing portion is shown. DETAILED DESCRIPTION

[0024] Hereinafter, embodiments of the pressure vessel according to the present disclosure will be described with reference to the accompanying drawings.

[0025] [Implementation Method 1]

[0026] Figure 1 1 is a cross-sectional view showing the first embodiment of the pressure vessel according to the present disclosure. The pressure vessel 100 of this embodiment is, for example, a tank mounted on a fuel cell vehicle or a hydrogen energy vehicle and filled with high-pressure hydrogen. The pressure vessel 100 includes, for example, a gas receiving portion 110, a valve 120, a sealing member 130, and a tubular member 140. Figure 1 In the illustrated example, the pressure container 100 includes a valve fixing member 150 for fixing the valve to the gas containing portion 110 .

[0027] The gas containment section 110 includes a synthetic resin liner 111 and a fiber-reinforced resin layer 112 covering the outer surface of the liner 111. Furthermore, the gas containment section 110 is provided with a neck section 114 having an opening 113 at its tip. More specifically, the gas containment section 110 includes: a cylindrical neck section 114; a shoulder section 115 connected to the neck section 114 and having a larger diameter than the neck section 114; a cylindrical main section 116 connected to the shoulder section 115; and a dome-shaped or hemispherical end section 117 connected to the main section 116. The shoulder section 115 gradually increases in diameter, for example, in a smooth curve from the neck section 114 toward the main section 116, and has a dome-shaped or hemispherical shape.

[0028] The liner 111 is an inner container made of synthetic resin with gas barrier properties that forms an internal space IS for containing gas. As the raw material of the liner 111, for example, polyamide, polyethylene, ethylene-vinyl alcohol copolymer resin (EVOH), polyester, epoxy resin, etc. can be used. When polyamide 6 is used as the raw material of the liner 111, the linear expansion coefficient of the liner 111 is, for example, 13×10 -5 [1 / K] or so.

[0029] The fiber-reinforced resin layer 112 covers the outer surface of the gas-containing liner 111, thereby functioning as a reinforcement layer to ensure the strength of the liner 110. The fiber-reinforced resin layer 112 is formed by, for example, winding a fiber bundle impregnated with uncured resin around the liner 111 and curing the resin impregnated in the fiber bundle, thereby covering the outer surface of the liner 111. The fiber bundles of the fiber-reinforced resin layer 112 can be made of, for example, glass fiber, aramid fiber, boron fiber, or carbon fiber. In terms of lightness and mechanical strength, carbon fiber is preferably used as the raw material for the fiber bundles of the fiber-reinforced resin layer 112.

[0030] As the resin impregnated in the fiber bundle of the fiber-reinforced resin layer 112, for example, a thermoplastic resin such as polyetheretherketone, polyphenylene sulfide, polyacrylate, polyimide, or polyamide can be used. Alternatively, as the resin impregnated in the fiber bundle of the fiber-reinforced resin layer 112, for example, a thermosetting resin such as phenolic resin, melamine resin, urea resin, or epoxy resin can be used.

[0031] The valve fixing member 150 is, for example, a cylindrical metal member mounted on the outside of the cylindrical neck portion 114 of the gas containing portion 110. The valve fixing member 150 is fixed to the outside of the neck portion 114 by having a protrusion on the inner circumference of the valve fixing member 150 bite into the outer circumference of the neck portion 114 to prevent it from slipping out. Threads for fixing the valve 120 are provided on the outer circumference of the valve fixing member 150.

[0032] The valve 120 is a metal member having, for example, a cylindrical insertion portion 121, which is inserted into the neck portion 114 through the opening 113 of the gas containing portion 110. The gas flow path 122 is provided in the insertion portion 121 and connects the internal space IS of the gas containing portion 110 with the external space OS. Furthermore, the valve 120 has, for example, a concave mounting portion 123 that is mounted on the front end of the neck portion 114 of the gas containing portion 110. The mounting portion 123 is secured to the front end of the cylindrical neck portion 114 of the gas containing portion 110 via the valve fixing member 150 by screwing threads provided on the inner circumferential surface facing the outer circumferential surface of the valve fixing member 150 into threads provided on the outer circumferential surface of the valve fixing member 150.

[0033] The insert portion 121 of the valve 120 is inserted into the inner side of the liner 111 of the cylindrical neck 114 of the gas containing portion 110, with the threads of the mounting portion 123 threadedly engaged with the threads of the valve holder 150. The insert portion 121 has a gas flow path 122 that connects the internal space IS of the gas containing portion 110 with the external space OS.

[0034] The sealing member 130 seals the neck portion 114 of the gas containing section 110 and the insert portion 121 of the valve 120. More specifically, the sealing member 130 is, for example, an O-ring disposed between the outer circumferential surface of the insert portion 121 and the lining 111 of the neck portion 114, thereby airtightly sealing the neck portion 114 of the gas containing section 110 and the insert portion 121 of the valve 120. The sealing member 130 is, for example, disposed in a groove formed in the outer circumferential surface of the insert portion 121 of the valve 120.

[0035] The tubular member 140 is a metal tubular or ring-shaped member disposed between the liner 111 and the fiber-reinforced resin layer 112 at the neck portion 114 of the gas containment section 110 and arranged around the sealing member 130. The tubular member 140 is sometimes referred to as an insert ring. The tubular member 140 is provided, for example, to prevent a decrease in the sealing performance of the sealing member 130 due to expansion of the fiber-reinforced resin layer 112 when the internal space IS of the gas containment section 110 is filled with gas and the internal pressure of the gas containment section 110 increases.

[0036] The linear expansion coefficient of the metal tubular member 140 is smaller than that of the synthetic resin liner 111. The material of the tubular member 140 is not particularly limited, and stainless steel can be used, for example. When the raw material of the tubular member 140 is stainless steel (SUS316L), the linear expansion coefficient of the tubular member 140 is, for example, approximately 1.6×10 -5 [1 / K], which is less than one eighth of the linear expansion coefficient of the liner 111. Therefore, when the temperature of the pressure vessel 100 decreases, the liner 111 shrinks more than the tubular member 140.

[0037] Figure 2 yes Figure 1 An enlarged cross-sectional view of the neck portion 114 of the gas containing portion 110 of the pressure vessel 100 is shown. The tubular member 140 includes anchor portions 143 and 144 embedded in the liner 111, with the inner surface 141 and outer surface 142 covered by the synthetic resin material of the liner 111. Alternatively, the tubular member 140 may include only one of the anchor portions 143 and 144. For example, the anchor portions 143 and 144 may be provided throughout the entire circumference of the tubular member 140, or may be provided partially along the circumference of the tubular member 140.

[0038] The first anchor portion 143 is provided at a distal end portion of the tubular member 140 near the opening 113 at the distal end of the neck portion 114, in the direction of the central axis CA of the tubular member 140. Furthermore, the second anchor portion 144 is provided at a proximal end portion of the tubular member 140, extending from the proximal end portion of the neck portion 114 of the gas containing portion 110 to the distal end portion of the shoulder portion 115, in the direction of the central axis CA of the tubular member 140.

[0039] exist Figure 2 In the illustrated example, the liner 111 has an expanded diameter portion 111a having an increased outer diameter at the front end of the neck portion 114. The expanded diameter portion 111a is provided, for example, in the direction of the central axis CA of the neck portion 114, extending from the opening 113 at the front end of the neck portion 114 to the front end of the tubular member 140, where the anchor portion 143 is formed. Furthermore, the central axis CA of the neck portion 114 and the tubular member 140 coincides with the central axis CA of the gas containing portion 110, for example.

[0040] exist Figure 2 In the example shown, the wall thickness of the liner 111 is thicker at the expanded diameter portion 111a than at other portions. The first anchor portion 143 is embedded in the expanded diameter portion 111a of the liner 111, and the diameter is expanded as it approaches the front end of the neck portion 114. The inner surface 141 and the outer surface 142 of the first anchor portion 143 are covered by the synthetic resin material of the liner 111. That is, Figure 2 In the example shown, a thin layer of synthetic resin material of the liner 111 is formed between the outer surface 142 of the first anchor portion 143 and the fiber-reinforced resin layer 112 .

[0041] In addition, the liner 111 has a thick portion 111b, which is thicker than the other portions, similar to the expanded diameter portion 111a, at the distal end of the shoulder portion 115 connected to the base end of the neck portion 114. The second anchor portion 144 is embedded in the thick portion 111b of the shoulder portion 115 of the liner 111 provided in the gas containing portion 110, and has a larger diameter as it moves away from the neck portion 114.

[0042] The inclination angle α of the outer surface 142 of the second anchor portion 144 relative to the central axis CA of the neck portion 114 is smaller than the inclination angle β of the outer surface of the thick portion 111b of the liner 111 relative to the central axis CA of the neck portion 114. Thus, the outer surface 142 of the anchor portion 144 is covered with the synthetic resin material of the liner 111, and a layer of the synthetic resin material of the liner 111 is formed between the anchor portion 144 and the fiber-reinforced resin layer 112.

[0043] Figure 3 It is an explanation Figure 2 The cross-sectional view shown in FIG. illustrates a method for manufacturing the liner 111 of the gas containment unit 110. The liner 111 is molded in several sections, for example, along the central axis CA of the gas containment unit 110, and then integrated by welding or other methods. Here, a method for manufacturing the front end portion of the liner 111, which constitutes the neck 114, shoulder 115, and a portion of the main body 116 of the gas containment unit 110, is described.

[0044] First, the tubular member 140 is fixed to the mold D for the liner 111. At this point, a gap G is formed between the inner wall of the mold D and the outer surfaces 142 of the anchors 143 and 144 of the tubular member 140. The outer surface 142 of the straight tube portion 145 of the tubular member 140 between the anchors 143 and 144 is in close contact with the inner wall of the mold D. In this state, injection molding is performed, where molten synthetic resin material for the liner 111 is injected from the gate D1 of the mold D and caused to flow in the direction of the arrow.

[0045] During this injection molding process, the molten synthetic resin material of the liner 111 enters the gap G between the gap G and the anchor portions 143 and 144 of the tubular member 140. Consequently, the inner surfaces 141 and outer surfaces 142 of the anchor portions 143 and 144 are covered with the synthetic resin material of the liner 111. Thus, the liner 111 and the tubular member 140 are integrated through insert molding. Here, the outer surface 142 of the straight tube portion 145 of the tubular member 140, which is in close contact with the inner wall of the mold D, is not covered by the synthetic resin material of the liner 111 but instead protrudes from the liner 111 and comes into contact with the fiber-reinforced resin layer 112.

[0046] Alternatively, a gap G may be formed between the outer surface 142 of the straight tube portion 145 of the tubular member 140 between the anchor portions 143 and 144 and the inner wall surface of the mold D. In this case, not only the inner surface 141 and outer surface 142 of the anchor portions 143 and 144, but also the inner surface 141 and outer surface 142 of the straight tube portion 145 of the tubular member 140 are covered by the synthetic resin material of the liner 111. In other words, the entire tubular member 140 is embedded in the synthetic resin material of the liner 111, and the entire outer surface of the tubular member 140 is covered by the synthetic resin material of the liner 111.

[0047] The following describes the function of the pressure vessel 100 of this embodiment by comparing it with the conventional gas tank described above. In the conventional gas tank, as described above, the insert ring is integrally provided with the liner on the outer periphery of the cylindrical engagement portion, which is part of the liner's mouth, tightening the O-ring installed between the engagement portion of the liner and the engagement portion of the interface member. In this structure, when the temperature of the gas tank drops, the synthetic resin liner and the metal insert ring shrink together. Consequently, due to the difference in thermal expansion coefficients between the liner and the insert ring, stress is applied that may cause the liner to peel from the insert ring, potentially reducing the reliability of the gas tank.

[0048] In contrast, the pressure vessel 100 of this embodiment includes a gas container 110, a valve 120, a sealing member 130, and a metal tubular member 140. The gas container 110 includes a synthetic resin liner 111 and a fiber-reinforced resin layer 112 covering the outer surface of the liner 111. The gas container 110 also includes a neck 114 having an opening 113 at its tip. The valve 120 includes an insert 121 inserted into the neck 114 through the opening 113, and a gas flow path 122 provided in the insert 121 and connecting the internal space IS of the gas container 110 with the external space OS. The sealing member 130 seals the space between the neck 114 and the insert 121. The tubular member 140 is provided between the liner 111 and the fiber-reinforced resin layer 112 at the neck 114 and is disposed around the sealing member 130. Furthermore, the tubular member 140 includes anchor portions 143 and 144 embedded in the liner 111 , with the inner surface 141 and the outer surface 142 being covered with the synthetic resin material of the liner 111 .

[0049] With this structure, the pressure vessel 100 of this embodiment can suppress a decrease in the sealing performance of the sealing member 130 due to expansion of the fiber-reinforced resin layer 112 when the internal pressure of the gas containment section 110 increases, by virtue of the tubular member 140 disposed inside the fiber-reinforced resin layer 112 and surrounding the sealing member 130. Furthermore, the anchors 143 and 144 of the tubular member 140 are embedded in the liner 111, with the inner and outer surfaces 141 and 142 of the anchors 143 and 144 covered by the synthetic resin material of the liner 111. Therefore, when the temperature of the pressure vessel 100 decreases, even if the liner 111 contracts more than the tubular member 140, the liner 111 is restrained to the tubular member 140 by the anchors 143 and 144, preventing the liner 111 from peeling off from the tubular member 140. This improves the reliability of the pressure vessel 100 when the temperature decreases.

[0050] In the pressure vessel 100 of this embodiment, the liner 111 has an expanded diameter portion 111a having an increased outer diameter at the front end of the neck 114. Furthermore, the anchor portion 143 of the tubular member 140 is embedded in the expanded diameter portion 111a of the liner 111 and is increasingly expanded toward the front end of the neck 114.

[0051] With this structure, the pressure vessel 100 of this embodiment can increase the area of ​​the inner surface 141 and outer surface 142 of the anchor portion 143 covered by the synthetic resin material of the liner 111, thereby enabling the liner 111 to be firmly restrained by the anchor portion 143. Furthermore, even if stress acts in the direction of the central axis CA of the tubular member 140 due to the difference in linear expansion coefficient between the liner 111 and the tubular member 140, the anchor portion 143, whose diameter is enlarged near the front end of the neck portion 114, can more reliably restrain the liner 111, thereby preventing the liner 111 from peeling off.

[0052] Furthermore, in the pressure vessel 100 of this embodiment, the gas containing portion 110 includes a shoulder portion 115 connected to the base end of the neck portion 114 and having a larger diameter than the neck portion 114. The anchor portion 144 of the tubular member 140 is embedded in the liner 111 of the shoulder portion 115 and has a larger diameter as it moves away from the neck portion 114. Furthermore, the inclination angle α of the outer surface 142 of the anchor portion 144 relative to the central axis CA of the neck portion 114 is smaller than the inclination angle β of the outer surface of the liner 111 of the shoulder portion 115 relative to the central axis CA.

[0053] With this structure, the pressure vessel 100 of this embodiment can increase the area of ​​the inner surface 141 and outer surface 142 of the anchor portion 144 covered by the synthetic resin material of the liner 111, thereby enabling the liner 111 to be firmly restrained by the anchor portion 144. Furthermore, even if stress acts in the direction of the central axis CA of the tubular member 140 due to the difference in linear expansion coefficient between the liner 111 and the tubular member 140, the liner 111 can be more reliably restrained by the anchor portion 144, which has a larger diameter as it moves away from the neck portion 114, thereby preventing the liner 111 from peeling off.

[0054] Furthermore, the inclination angle α of the outer surface 142 of the anchor portion 144 relative to the central axis CA of the neck portion 114 is smaller than the inclination angle β of the outer surface of the liner 111 of the shoulder portion 115 relative to the central axis CA. Therefore, the thickness of the synthetic resin material of the liner 111 covering the outer surface 142 of the anchor portion 144 is increased as the distance from the neck portion 114 increases, and the liner 111 can be more firmly constrained by the anchor portion 144.

[0055] As described above, according to the present embodiment, it is possible to provide the pressure vessel 100 that can improve reliability when the temperature drops by constraining the liner 111 using the anchor portions 143 and 144 of the tubular member 140 .

[0056] [Implementation Method 2]

[0057] Next, referring to the embodiment 1 Figure 1 , refer to Figure 4 and Figure 5 A second embodiment of the pressure vessel according to the present disclosure will be described. Figure 4 This is a diagram showing a second embodiment of the pressure vessel according to the present disclosure, which corresponds to the first embodiment. Figure 2 An enlarged cross-sectional view of . Figure 5 It is an explanation Figure 4 sectional views showing a method for manufacturing the liner 111 of the gas containing portion 110 are shown.

[0058] The pressure vessel 100 of this embodiment differs from the pressure vessel 100 of Embodiment 1 in the structure of the anchor portions 146 and 147 of the tubular member 140. The pressure vessel 100 of this embodiment has the same other structures as the pressure vessel 100 of Embodiment 1, and thus the same reference numerals are used for the same parts, and their descriptions are omitted.

[0059] Similar to the pressure vessel 100 of the first embodiment, in the pressure vessel 100 of this embodiment, the liner 111 has an expanded diameter portion 111a having an increased outer diameter at the distal end of the neck portion 114. Furthermore, in the pressure vessel 100 of this embodiment, the first anchor portion 146 of the tubular member 140 is embedded in the expanded diameter portion 111a of the liner 111 and has a through hole 148 that radially penetrates the tubular member 140.

[0060] Through such a structure, Figure 5 As shown, when the molten synthetic resin material of the liner 111 is injected from the gate D1 of the mold D to insert-mold the tubular member 140 into the liner 111, the inner surface 141 and outer surface 142 of the anchor portion 146 are covered with the synthetic resin material. Furthermore, the molten synthetic resin material fills the through-hole 148. This allows the molded liner 111 to be securely fixed to the anchor portion 146 of the tubular member 140.

[0061] Furthermore, similar to the pressure vessel 100 of the first embodiment, in the pressure vessel 100 of this embodiment, the second anchor portion 147 is embedded in the liner 111 of the shoulder portion 115 of the gas containing portion 110. Furthermore, in the gas containing portion 110 of this embodiment, the second anchor portion 147 has an inclined surface 149 that forms an acute angle with the inner surface 141 and an obtuse angle with the outer surface 142. Furthermore, the inner surface 141 and the inclined surface 149 of the anchor portion 147 are covered by the synthetic resin material of the liner 111.

[0062] According to this structure, Figure 5 As shown, when the molten synthetic resin material of the liner 111 is injected from the gate D1 of the mold D and the tubular member 140 is insert-molded into the liner 111, the synthetic resin material that is drawn in from the inner surface 141 side covers the outer inclined surface 149 of the anchor portion 147. As a result, as shown in FIG. Figure 4 As shown, the anchor portion 147 bites into the synthetic resin material of the liner 111, and the synthetic resin material of the liner 111 exists outside the anchor portion 147. Thus, the molded liner 111 can be firmly fixed to the anchor portion 147 of the tubular member 140.

[0063] Therefore, according to this embodiment, similar to the above-described first embodiment, it is possible to provide a pressure vessel 100 that can improve reliability when the temperature drops by constraining the liner 111 using the anchor portions 146 and 147 of the tubular member 140 .

[0064] While the embodiment of the pressure vessel according to the present disclosure has been described in detail above using the drawings, the specific structure is not limited to the embodiment, and any design changes that do not depart from the spirit of the present invention are also included in the present disclosure.

[0065] Label Description

[0066] 100 pressure vessels

[0067] 110 Gas storage unit

[0068] 111 Lining

[0069] 111a Expanded diameter

[0070] 112 fiber reinforced resin layer

[0071] 113 opening

[0072] 114 Neck

[0073] 115 Shoulders

[0074] 120 valve

[0075] 121 Insertion

[0076] 122 Gas flow path

[0077] 130 Sealing component

[0078] 140 Tubular components

[0079] 141 inner surface

[0080] 142 outer surface

[0081] 143 Anchoring

[0082] 144 Anchoring

[0083] 146 Anchoring

[0084] 147 Anchor

[0085] 148 through holes

[0086] 149 Inclined Surface

[0087] CA Central Axis

[0088] IS Interior

[0089] OS external space

[0090] α Tilt angle

[0091] β tilt angle

Claims

1. A pressure vessel, characterized in that: have: a gas receiving portion having a synthetic resin liner and a fiber-reinforced resin layer covering the outer surface of the liner, and provided with a neck portion having an opening at a front end; a valve having an insertion portion inserted into the neck portion from the opening, and a gas flow path provided in the insertion portion and connecting the internal space of the gas containing portion with the external space; a sealing member for sealing between the neck portion and the insertion portion; and A metal tubular member is provided between the liner and the fiber-reinforced resin layer at the neck portion and is disposed around the sealing member. The tubular member has an anchor portion embedded in the liner and having its inner and outer surfaces covered by the synthetic resin material of the liner. The liner has an expanded diameter portion with an enlarged outer diameter at the front end portion of the neck. The anchor portion is embedded in the enlarged diameter portion of the liner, and its diameter is enlarged as it approaches the front end of the neck portion.

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