JP2010266029A - High-pressure gas tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-pressure gas tank having simple construction for preventing the deformation of members resulting from pressure in the tank. <P>SOLUTION: The high-pressure gas tank 10 stores gas at higher pressure than normal pressure. It includes a hollow liner 12 whose internal functions as a gas storage space 18, a cap 14 arranged at the end of the liner 12, and a reinforcing layer 16 covering the outside face of the liner 12 mounted with the cap 14. The cap 14 has an approximately cylindrical cylinder part 30 and a collar part 32 extending from the outside face of the cylinder part 30 along the end face of the liner 12, and also has a displacement restricting member for restricting the displacement of the reinforcing layer 16. The displacement restricting member specifically includes a protruding part 40 extending from the outside face of the cylinder part 30 and protruding into the reinforcing layer 16, and an abutting part 42 abutting on the outermost layer of the reinforcing layer 16. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a high-pressure gas tank that stores gas (for example, natural gas or hydrogen gas) at a pressure higher than normal pressure.

  Conventionally, high-pressure gas tanks that store fuel gas such as natural gas or hydrogen gas at a pressure higher than normal pressure, that is, high pressure (for example, 35 MPa or 70 MPa) are widely known. Such a high-pressure gas tank is mounted on a mobile body using these gases as fuel, such as a fuel cell vehicle or a CNG vehicle.

  As this type of high-pressure gas tank, for example, the one described in Patent Document 1 is known. The high-pressure gas tank described in Patent Document 1 includes a synthetic resin inner shell, a base attached to the inner shell, and an outer shell (reinforcing layer) made of FRP (Fiber Reinforced Plastics) covering the outer surface of the inner shell and the base. ,have.

JP 2008-14342 A

  Here, in such a conventional high-pressure gas tank, a flange portion (flange portion) located between the inner shell and the outer shell is often extended. Such a heel part tends to concentrate a load as compared with other parts, and is likely to be deformed by receiving the load. This deformation of the collar becomes one of the causes of the performance deterioration and the life reduction of the high-pressure gas tank. In order to prevent this heel part deformation | transformation, it is possible to make a reinforcement layer thick. However, increasing the thickness of the reinforcing layer causes an increase in cost and an increase in the size and weight of the tank.

  In order to reduce such a problem, Patent Document 2 discloses a technique in which a cushioning material that absorbs and relaxes the compressive stress applied to the flange portion is disclosed between the flange portion and the reinforcing layer that are likely to be deformed by tank internal pressure. Has been. According to such a technique, the member deformation caused by the tank internal pressure can be somewhat reduced. However, this technique requires a new part called a cushioning material, and has a problem of increasing costs and labor. That is, conventionally, it has been difficult to obtain a high-pressure gas tank having a simple configuration that can prevent deformation of a member due to tank internal pressure.

  Therefore, an object of the present invention is to provide a high-pressure gas tank having a simple configuration that can prevent member deformation due to tank internal pressure.

  The high-pressure gas tank of the present invention is a high-pressure gas tank that stores gas at a pressure higher than normal pressure, and has a hollow liner that functions as a gas storage space and an end of the liner, and the liner A base that communicates with the inside and outside of the base, including a substantially cylindrical tubular portion and a flange that protrudes outward from the outer surface of the tubular portion and extends along the end surface of the liner, and an outer side of the liner on which the base is mounted A displacement layer that regulates displacement of the reinforcement layer by contacting at least a part of the reinforcement layer that is to be displaced in a direction in which the contact area with the die decreases. It has a member, It is characterized by the above-mentioned.

  In a preferred aspect, the displacement regulating member includes an abutting portion that protrudes outward from the vicinity of the tip of the cylindrical portion and that abuts against the outermost layer of the reinforcing layer and inhibits the displacement of the reinforcing layer. In this case, it is desirable that the abutting portion has a substantially trumpet shape with an outer diameter increasing toward the tip. Further, when the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted, the contact portion is detachable from the cylindrical portion. It is desirable that the cylindrical portion is attached after the reinforcing layer is formed. Further, when the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted, the end surface on the distal end side of the abutting portion is closer to the edge. It is desirable that the taper be provided so as to approach the end surface of the liner.

  In another preferred aspect, the displacement restricting member includes a protrusion that protrudes outward from a contact portion with the reinforcing layer on the outer surface of the cylindrical portion and protrudes into the reinforcing layer. In this case, an internal thread for attaching and detaching the valve assembly is formed on the inner side surface of the cylindrical portion, and the projecting portion extends from a portion of the outer surface of the cylindrical portion that faces the portion where the internal thread is formed. It is desirable to project outward. Further, when the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted, the end surface on the tip side of the protruding portion is closer to the edge of the liner. It is desirable that a taper is provided so as to approach the end face.

  According to the present invention, the base includes the displacement regulating member that regulates the displacement of the reinforcing layer by contacting at least a part of the reinforcing layer to be displaced in a direction in which the contact area with the base is reduced. Therefore, the member deformation due to the tank internal pressure can be effectively prevented.

It is a schematic sectional drawing of the high-pressure gas tank which is an embodiment of the present invention. It is the A section enlarged view in FIG. It is a figure which shows an example of another high pressure gas tank. It is an image figure which shows the mode of reinforcement layer formation. It is a figure which shows an example of another high pressure gas tank. It is a figure which shows the cross section of another high pressure gas tank. It is a figure which shows the conventional high pressure gas tank.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic cross-sectional view of a high-pressure gas tank 10 according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion A in FIG.

  The high-pressure gas tank 10 is a container for storing a fuel gas such as hydrogen gas or natural gas at a pressure higher than normal pressure, that is, high pressure (for example, several tens of MPa to 100 MPa). The high-pressure gas tank 10 may be used as a stationary type or mounted on a moving body such as a vehicle. For example, when used in a fuel cell vehicle, the high pressure gas tank 10 is filled with fuel gas (hydrogen gas) having a pressure of about several tens of Mpa to 100 Mpa.

  The high-pressure gas tank 10 includes a liner 12 made of resin or the like, a base 14 attached to an end portion of the liner 12, a liner 12 and a reinforcing layer 16 that covers the outer surface of the base 14. The liner 12 is a substantially cylindrical member having gas barrier properties and is made of resin or the like. More precisely, the liner 12 has a shape in which a substantially hemispherical surface is connected to both ends of a cylinder, and the inside of the liner 12 becomes a gas storage space 18 filled with high-pressure gas. Furthermore, one end or both ends (both ends in the illustrated example) of the liner 12 are folded inside the tank to form an insertion cylinder 20 into which the cap 14 is inserted. The insertion tube 20 is a substantially cylindrical portion having an inner diameter that is substantially the same as or slightly larger than the outer diameter of the base 14.

  The base 14 is a member that is disposed at the end of the liner 12 and communicates with the inside and outside of the liner 12. A valve assembly (not shown) is attached to and detached from the base 14. The base 14 is made of a metal such as stainless steel or aluminum, and includes a substantially cylindrical tube portion 30, a flange portion 32 that protrudes from the outer surface of the tube portion 30, a displacement regulating member that will be described later, and the like. Yes. In the following description, the end of the base that is inserted into the liner 12 (that is, the right end in FIG. 2) is the “rear end”, and the end that protrudes outside the liner 12 (that is, the figure). The left end portion in FIG.

  The cylindrical portion 30 is a cylindrical portion whose inner diameter is slightly smaller than the outer diameter of the valve assembly. Of the cylindrical portion 30, a portion closer to the rear end than the flange portion 32 (rightward portion in FIG. 2) functions as an insertion portion 34 inserted into the insertion tube 20 of the liner 12, and is a portion closer to the distal end than the flange portion 32. Functions as a neck portion 36 that protrudes outward from the liner 12. A female screw 38 that allows the valve assembly to be attached and detached is formed on the inner side surface of the neck portion 36.

  The collar portion 32 is a substantially disk-shaped portion projecting outward from the intermediate height position of the cylindrical portion 30. The flange portion 32 is a part integrally formed with the cylindrical portion 30. The flange portion 32 has a shape corresponding to the periphery of the hemispherical surface of the liner 12, and when the base 14 is attached to the liner 12, the flange portion 32 and the end surface of the liner 12 are smoothly continuous. Yes.

  Here, as will be described in detail later, when the inside of the liner 12 is filled with gas, the base 14 is pressed outward (to the left in FIG. 2) by the pressure of the gas. As the base 14 is pressed outward, the flange portion 32 presses the reinforcing layer 16 outward, which may cause the reinforcing layer 16 to be deformed. Such deformation of the reinforcing layer 16 is known to cause various problems. Therefore, in this embodiment, in order to prevent or reduce the deformation of the reinforcing layer 16 by the flange 32, the base 14 is provided with a displacement regulating member that prevents or reduces the displacement of the reinforcing layer 16. The displacement restricting member includes protrusions 40u and 40d (hereinafter simply referred to as “protrusion 40” unless otherwise specified) and an abutting part 42. The specific configuration and operation thereof will be described in detail later.

  The reinforcing layer 16 is a layer provided for the purpose of reinforcing the liner 12 made of resin or the like, and is made of, for example, unit fiber reinforced plastic (CFRP) as a fiber reinforced composite material. The reinforcing layer 16 is formed by winding CFRP, which is a fibrous material, around the outer surface of the liner 12 with the cap 14 attached thereto, for example, by a filament winding method (hereinafter referred to as “FW method”). It is formed. As is apparent from the drawings, the tip of the base 14 protrudes to the outside of the reinforcing layer 16, and an opening 50 for allowing the base 14 to protrude is formed in the reinforcing layer 16. .

  Here, the pressure of the gas filled in the tank is transmitted to the reinforcing layer 16 through the base 14 and the liner 12. It is known that this transmitted pressure is not uniform and tends to be excessive around the collar portion 32 of the base 14. As a result, in the conventional high-pressure gas tank, the reinforcing layer may be deformed around the flange portion. This will be described in detail with reference to FIG.

  7A and 7B are schematic cross-sectional views of a conventional high-pressure gas tank. FIG. 7A shows a state before deformation of the reinforcing layer 16 and FIG. 7B shows a state after deformation of the reinforcing layer 16. A conventional high-pressure gas tank also includes a resin liner 12, a base 14 attached to an end of the liner 12, a liner 12, a reinforcing layer 16 that covers the outer surface of the base 14, and the like. However, unlike the high-pressure gas tank of the present embodiment, the base 14 of the conventional high-pressure gas tank is not provided with a protrusion 40 or a contact portion 42 that is a displacement regulating member that regulates the displacement of the reinforcing layer 16. Therefore, the conventional base 14 includes a substantially cylindrical tube portion 30 and a substantially disk-shaped flange portion 32 that protrudes outward from an intermediate height position of the tube portion 30. A valve assembly 100 is mounted inside the base 14 by screwing.

  Here, when the high-pressure gas tank is filled with the high-pressure gas, the pressure of the high-pressure gas is transmitted to the reinforcing layer 16 through the liner 12 and the base 14, and the reinforcing layer 16 is pressed outward. In response to this pressing, the periphery of the opening 50 of the reinforcing layer 16 is deformed in a direction in which the opening 50 expands, in other words, in a direction in which the contact area with the base 14 decreases, and as a result, illustrated in FIG. It may become a state to do.

  As a cause of such deformation, first, the periphery of the opening 50 in the reinforcing layer 16 is lower in strength than other parts and easily deformed. Another reason is that an excessive pressing force is easily transmitted to the periphery of the opening 50 as compared with other parts via the flange portion 32 of the base 14.

  That is, the pressure of the high-pressure gas is applied not only to the inner surface of the liner 12 but also to the bottom surface of the cylindrical portion 30 of the base 14 and the bottom surface of the valve assembly 100 screwed to the base 14. Under this internal pressure, the valve assembly 100 and the base 14 try to protrude outward. However, the protrusion of the base 14 or the like is hindered by the flange portion 32 of the base 14 coming into contact with the reinforcing layer 16. From another point of view, not only the internal pressure acting on the flange 32 but also the force that the base 14 and the valve assembly 100 try to protrude outward is applied to the contact portion of the reinforcing layer 16 with the flange 32. It will be.

More specifically, when the pressure of the high-pressure gas is P, the outer diameter of the flange portion 32 is b, and the outer diameter of the cylindrical portion 30 of the base 14 is r, the pressure is transmitted to the reinforcing layer 16 via the flange portion 32. The pressure P ^* to be applied is expressed by a mathematical formula of P ^* = (b ² × P) / (b ² −r ² ). That is, the portion of the reinforcing layer 16 that contacts the collar portion 32 receives a pressure {b ² / (b ² −r ² )} times that of the other portions. As a result, the periphery of the opening 50 in the reinforcing layer 16 is easily displaced in the direction in which the contact area with the base 14 decreases, that is, in the outer direction.

  When the reinforcement layer 16 is deformed around the opening 50, a minute gap is formed between the base 14, the liner 12, and the reinforcement layer 16 as shown in FIG. The strength of the high-pressure gas tank as a whole may be reduced. Above all, the deformation of the reinforcing layer 16 causes a further reduction in the contact area between the base 14 and the reinforcing layer 16, and thus further concentration of the load (pressure). As a result, the deformation of the reinforcing layer 16 further increases. Invite a vicious circle to induce.

  In the present embodiment, the shape of the base 14 is made special in order to prevent or reduce the deformation of the reinforcing layer 16 and thus the concentration of load (pressure). This will be described below with reference to FIGS. 1 and 2 again.

  As described above, the base 14 of this embodiment has a displacement regulating member that regulates (prevents or reduces) the displacement of the reinforcing layer 16. This displacement regulating member basically has a configuration that regulates displacement of the reinforcing layer 16 by contacting at least a part of the reinforcing layer 16 that is to be displaced in a direction in which the contact area with the base 14 is reduced. It has become. More specifically, in the present embodiment, the protrusion 14 and the contact portion 42 are provided on the base 14 as a displacement regulating member.

  The protruding portion 40 is a substantially disc-shaped rib that protrudes outward from a contact portion with the reinforcing layer 16 (that is, the outer surface of the neck portion 36) in the outer surface of the cylindrical portion 30. The protruding portion 40 extends in a direction substantially orthogonal to the axis of the cylindrical portion 30 that is substantially cylindrical, in other words, in a direction substantially parallel to the extending direction of the flange portion 32. Therefore, when the cap 14 or the like tries to protrude outward under the pressure of the high-pressure gas filled in the tank, the reinforcing layer 16 abuts not only on the flange portion 32 but also on the upper surface of the projection portion 40. It will be. Thus, the outward protrusion of the base 14 and the like is inhibited. From another viewpoint, the projecting output of the cap 14 and the like is distributed not only to the flange portion 32 but also to the upper surface of the projecting portion 40 and transmitted to the reinforcing layer 16.

  In other words, in the case of the present embodiment, the area in contact with the reinforcing layer 16 for transmitting the projecting output of the cap 14 and the like is increased by the amount of the projecting portion 40 compared to the conventional case. As a result, the pressing force per unit area is reduced as compared with the conventional high-pressure gas tank (the high-pressure gas tank shown in FIG. 7) in which the projecting output is transmitted only by the collar portion 32. And as a result, since an excessive pressure is prevented from being applied partially, deformation of the reinforcing layer is effectively prevented or reduced.

  In addition, when the reinforcing layer 16 is deformed outwardly by receiving pressure from the flange portion 32, the bottom surface of the protrusion 40 comes into contact with the reinforcing layer 16, so that the deformation of the reinforcing layer 16 is effective. To be prevented. In other words, the displacement of the reinforcing layer 16 is restrained by the protrusion 40.

  That is, by providing the protrusion 40, the contact area between the base 14 and the reinforcing layer 16 can be increased, and hence the pressing force per unit area can be reduced, and the displacement of the reinforcing layer 16 can be restrained. As a result, the displacement of the reinforcing layer 16 can be effectively prevented or reduced.

  The contact part 42 is a part provided in the vicinity of the tip of the base 14. The shape of the contact portion 42 is not particularly limited as long as it protrudes outward from the vicinity of the tip of the cylindrical portion 30 and can contact the outermost layer of the reinforcing layer 16 to inhibit the displacement of the reinforcing layer 16. In this embodiment, as illustrated in FIG. 2, the contact portion 42 has a substantially trumpet shape in which the outer diameter increases as it approaches the tip. When the reinforcing layer 16 is displaced outward due to the internal pressure of the tank, the bottom surface of the abutting portion 42 comes into contact with the outermost layer of the reinforcing layer 16. And by this contact, the outward displacement of the reinforcing layer 16 is effectively prevented or reduced.

  As is clear from the above description, in the present embodiment, the displacement that regulates the displacement of the reinforcing layer 16 by abutting at least a part of the reinforcing layer 16 that is to be displaced in a direction in which the contact area with the base 14 is reduced. It has a regulating member (protrusion 40 and abutment 42). And by having this displacement control member, a deformation | transformation of the reinforcement layer 16 can be prevented or reduced effectively.

  The configuration described here is merely an example, and the specific configuration may be appropriately changed as long as the displacement of the reinforcing layer 16 can be regulated by contacting at least a part of the reinforcing layer 16. . For example, in the above-described embodiment, both the protrusion 40 and the contact portion 42 are provided, but only one of them may be provided. For example, only the protrusion 40 may be provided and the contact part 42 may be omitted. Conversely, only the contact portion 42 may be provided and the protrusion 40 may be omitted.

  FIG. 2 also includes two protrusions 40 having different shapes, that is, an upper protrusion 40u having a substantially rectangular cross section and a lower protrusion 40d having a substantially triangular cross section. However, the number of the protrusions 40 is not particularly limited, and may be one or three or more. When a plurality of protrusions 40 are provided, the shapes of the plurality of protrusions 40 may be the same or different from each other.

  Moreover, the formation position of this projection part 40 will not be specifically limited if it is a contact part with the reinforcement layer 16 among the outer surfaces of the cylinder part 30 of the nozzle | cap | die 14 at least. However, in order to improve the strength of the base 14, it is desirable that the protrusion 40 be provided at a position on the outer surface of the cylindrical portion 30 that faces a portion where the female screw 38 for screwing and mounting the valve assembly is formed. That is, the portion where the female screw 38 for screwing and attaching the valve assembly is slightly thinner than other parts due to its configuration, and the strength tends to decrease. Providing the protrusion 40 at such a portion where the strength is likely to decrease causes the protrusion 40 to function as a reinforcing material that reinforces the strength of the cylindrical portion 30, thereby improving the strength of the entire base 14.

  Further, the shapes of the contact part 42 and the protrusion part 40 are not particularly limited as long as they can contact the reinforcing layer 16 to be displaced. However, when the reinforcing layer 16 is formed by winding a fibrous material around the outer surface of the liner 12 to which the cap 14 is attached, the upper surface of the contact portion 42 and the protruding portion 40 is tapered. Is desirable.

  That is, as shown in FIG. 3, the upper surfaces of both the abutting portion 42 and the protruding portion 40 are tapered so that they approach the end surface of the liner as they approach the edge (approach to the right side in FIG. 3). It is desirable that By setting it as this shape, the formation process of the reinforcement layer 16, ie, the winding process of a fibrous material, can be performed easily. This will be described with reference to FIG.

  FIG. 4 is an image diagram showing how the reinforcing layer 16 is formed by the FW method. In the FW method, a bundle of FCRP impregnated in a resin, that is, a fiber bundle is wound around a liner. During this winding, the liner is rotated about its long axis. Further, the bobbin that holds the fiber bundle is also rotated and moved as appropriate.

  The winding method is not particularly limited. For example, hoop winding, helical winding, or other winding methods may be used. Here, the hoop winding is a winding method in which the fiber bundle is set substantially perpendicular to the rotation axis and the winding locations are gradually shifted. The helical winding is a winding method in which the fiber bundle is set obliquely with respect to the rotation axis and the winding location is largely shifted. In any case, the reinforcing layer 16 is formed by winding the fibrous material around the liner 12.

  Here, the reinforcing layer 16 is naturally formed between the abutting portion 42 and the protruding portion 40, between the protruding portion 40 and the protruding portion, and between the protruding portion 40 and the flange portion 32. There is a need. At this time, if the upper surfaces of the contact part 42 and the protrusion part 40 are substantially horizontal or taper away from the end face of the liner 12 as approaching the edge, the contact part 42 and the protrusion part 40 are in the process of winding. The fiber material caught on the upper surface stays caught on the upper surface. On the other hand, as illustrated in FIG. 3, a case is considered in which the upper surfaces of the protrusions 40 and the abutting portions 42 have a substantially downward taper (a taper that approaches the liner end surface as it approaches the edge). In this case, even if the fiber material is caught on the upper surface in the winding process, if the fiber material is pulled in a direction to press against the upper surface, the fiber material slides on the upper surface, and the contact portion 42 or the protrusion 40. Will automatically fall to the underside. As a result, the fiber material can be easily arranged also on the lower side of the abutting portion 42 and the protruding portion 40. In other words, the reinforcing layer 16 can be more easily formed by forming a downward taper.

  In the above description, only the case where the abutting portion 42 and the protruding portion 40 are integrally formed with the cylindrical portion 30 of the base 14 is illustrated, but these are detachable from the cylindrical portion 30. However, for example, as shown in FIG. 5, a tubular body or an annular body having a male screw formed on the outer surface of the cylindrical portion 30 and a female screw capable of screwing the contact portion 42 into the male screw. It is good. Thus, by making the contact part 42 detachable, the forming operation of the reinforcing layer 16, that is, the winding operation of the fiber material can be facilitated.

  That is, in this case, when the fiber material is wound, if the contact portion 42 is removed from the cylindrical portion 30, the fiber material is not caught on the upper surface of the contact portion 42 at the time of winding, and the fiber material is wound. Work can be performed easily. Then, after the winding of the fiber material is completed and the reinforcing layer 16 is completely formed, if the contact portion 42 is attached to the cylindrical portion 30 by attaching means such as screwing, the reinforcing layer 16 Subsequent deformation can also be effectively prevented or reduced.

  In the above description, only the case where the contact portion 42 and the protrusion portion 40 are substantially disk-shaped members extending from the entire periphery of the cylindrical portion 30 is illustrated. A plurality of ribs arranged in the circumferential direction on the outer surface of 30 may be used. For example, the BB cross section in FIG. 2 may have a shape as shown in FIG. Even in such a configuration, the plurality of ribs (the abutting portion 42 or the protruding portion 40) abuts on a part of the reinforcing layer 16 to be displaced and tries to inhibit the displacement. The deformation of the member can be effectively prevented or reduced as compared with the conventional high pressure gas tank. In addition, when the contact part 42 or the protrusion part 40 is comprised by the some rib arranged in the circumferential direction, it is desirable to arrange the said several rib at equal intervals in the circumferential direction in the world which can receive a pressure equally.

  DESCRIPTION OF SYMBOLS 10 High pressure gas tank, 12 liner, 14 nozzle | cap | die, 16 reinforcement layer, 18 gas storage space, 20 insertion cylinder, 30 cylinder part, 32 collar part, 34 insertion part, 36 neck part, 38 internal thread, 40 protrusion part, 42 contact part 50 opening, 100 valve assembly.

Claims (8)

A high-pressure gas tank that stores gas at a pressure higher than normal pressure,
A hollow liner whose inside functions as a gas storage space,
A base that is disposed at an end of the liner and communicates with the inside and outside of the liner, and includes a substantially cylindrical tubular portion and a flange that projects outward from the outer surface of the tubular portion and extends along the end surface of the liner When,
A reinforcing layer covering the outer surface of the liner on which the base is mounted;
With
The base has a displacement regulating member that regulates displacement of the reinforcing layer by coming into contact with at least a part of the reinforcing layer to be displaced in a direction in which the contact area with the base becomes small.
A high-pressure gas tank characterized by that. The high-pressure gas tank according to claim 1,
The displacement regulating member includes an abutting portion that projects outward from the vicinity of the tip of the cylindrical portion and that abuts against the outermost layer of the reinforcing layer to inhibit displacement of the reinforcing layer. . The high-pressure gas tank according to claim 2,
The high-pressure gas tank, wherein the contact portion has a substantially trumpet shape with an outer diameter increasing toward the tip. The high-pressure gas tank according to claim 2 or 3,
When the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted,
The contact portion is detachable from the cylindrical portion, and is attached to the cylindrical portion after the reinforcement layer is formed.
A high-pressure gas tank characterized by that. The high-pressure gas tank according to any one of claims 2 to 4,
When the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted,
The end surface on the front end side of the contact portion is tapered so as to approach the end surface of the liner as it approaches the edge.
A high-pressure gas tank characterized by that. The high-pressure gas tank according to any one of claims 1 to 5,
The high pressure gas tank, wherein the displacement regulating member includes a protruding portion that protrudes outward from a contact portion with the reinforcing layer on the outer surface of the cylindrical portion and protrudes into the reinforcing layer. The high-pressure gas tank according to claim 6,
An internal thread for attaching and detaching the valve assembly is formed on the inner surface of the cylindrical portion,
The projecting portion protrudes outward from a portion where the female screw is formed on the outer surface of the cylindrical portion.
A high-pressure gas tank characterized by that. The high-pressure gas tank according to claim 6 or 7,
When the reinforcing layer is configured by winding a fibrous material around the outer surface of the liner on which the base is mounted,
The end surface on the tip side of the protrusion is tapered so as to approach the end surface of the liner as it approaches the edge.
A high-pressure gas tank characterized by that.

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