JP2013228082A - Pressure container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure container that can be inexpensively manufactured.SOLUTION: A fixed region 31 and a common region 30 are provided in an insert ring 3 of a pressure container so that an outer diameter of the fixed region 31 is larger than an outer diameter of the common region 30, at least part of an outer circumferential surface 310 of the fixed region 31 is exposed to an outer circumference of a linear mouth 111, and an axial length L1 of the fixed region 31 is longer than a thickness w1 of the insert ring 3.

Description

  The present invention relates to a pressure vessel for filling various pressurized substances, and a manufacturing method thereof.

  Examples of pressurized substances filled in the pressure vessel include liquid hydrogen, various compressed gases such as CNG (compressed natural gas), and various liquefied gases such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas). .

  As a pressure vessel for filling these various pressurized substances, generally, a metal vessel part attached to a hollow vessel body and a valve attached to the die part are used. In this type of pressure vessel, it is general that the inner peripheral surface of the container main body is formed of a resin liner portion, and the outer peripheral surface of the liner portion is covered with a reinforcing portion made of high-strength resin (FRP or the like). In general, an O-ring for sealing the base and the liner is interposed between the base and the liner.

  The O-ring is pressed against the liner part and the base part. Since the liner portion is made of resin, it may be deformed by the pressing force of the O-ring. As a result, it may be difficult to improve the sealing performance between the liner portion and the base portion. For this reason, in this type of pressure vessel, the liner portion is reinforced by integrating a ring-shaped insert ring with a rigidity higher than that of the liner portion (see, for example, Patent Documents 1 to 3). .

  The insert ring is required to have a relatively high rigidity. For this reason, the insert ring is generally made of metal. Such an insert ring and a liner part can be integrated by an insert molding method. In this case, in order to stably place the insert ring on the mold for the liner portion, it is necessary to make at least a part of the outer peripheral surface of the insert ring abut on the mold surface of the mold. For this reason, at least a part of the outer peripheral surface of the insert ring is exposed on the surface of the liner portion. Further, since the insert ring and the liner portion are integrated, at least a part of the inner peripheral surface of the insert ring abuts on the liner portion.

  By the way, it is difficult to firmly integrate the insert ring and the liner portion by simply contacting the liner contact surface with the liner portion. For this reason, in Patent Documents 1 and 2, in order to firmly integrate the insert ring and the liner portion, a technology is provided in which the insert ring and the liner portion are engaged with each other by providing complementary shapes on the insert ring and the liner portion. Has been proposed. In order to provide such an uneven shape, the insert ring is preferably manufactured by cutting or forging. However, according to such a method, there is a problem that it is difficult to manufacture the insert ring at low cost.

  Patent document 3 introduces an insert ring formed by press working. This insert ring is inexpensive because it does not require cutting or forging during manufacture. However, the press-processed product is inferior in molding accuracy compared to the cut product. For this reason, it is difficult to mold the insert ring formed by pressing into a shape along the mold surface of the mold. If the insert ring is not stably fixed to the mold surface of the mold, the insert ring may move within the mold and may not be integrated at the correct position with respect to the liner portion, resulting in production loss. Patent Document 3 discloses a technique in which one end of the insert ring in the axial direction is bent toward the radially outer side (outer peripheral side) of the insert ring and the end surface is brought into contact with the mold surface of the mold. However, even with this technique, it has been difficult to stably hold the insert ring in the mold. In other words, in this case, the region of the insert ring that contacts the mold surface is only the thickness of the insert ring and is very small. For this reason, the insert ring is easy to move (position shift) in the mold and is difficult to be stably held in the mold. Therefore, also in this case, the insert ring is not integrated at the correct position with respect to the liner portion, and a manufacturing loss may occur, and there is a problem that it is difficult to reduce the manufacturing cost of the pressure vessel.

JP 2008-175341 A JP 2010-249239 A JP 2011-85230 A

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a pressure vessel that can be manufactured at low cost.

The pressure vessel of the present invention that solves the above problems is
A hollow container body having an opening, and a base part forming the periphery of the opening,
The inner peripheral surface of the container body is composed of a resin liner,
The liner portion is disposed on the outer peripheral side of the base portion and has a liner mouth portion extending toward the inside of the container body, and an O-ring is disposed between the base portion and the liner mouth portion. A pressure vessel,
An insert ring having a ring shape that is higher in rigidity than the liner portion is integrally formed in the liner mouth portion,
The insert ring has a fixed region portion that is a partial region in the axial direction, and a general region portion that is another partial region in the axial direction,
The diameter of the circle that wraps around the radially outer end in the radial section of the fixed region is larger than the diameter of the circle that wraps around the radially outer end of the general region.
At least a part of the outer peripheral surface of the fixed region portion is exposed to the outer periphery of the liner mouth portion,
The outer peripheral surface of the fixed region portion is exposed on the outer periphery of the liner mouth portion,
The axial length of the fixed region portion is larger than the wall thickness of the insert ring.

The pressure vessel of the present invention preferably includes any one of the following (1) to (3), and more preferably includes a plurality.
(1) The insert ring is made of metal and is pressed.
(2) The general region portion is disposed on the proximal end side of the liner mouth portion, and the fixed region portion is disposed on the extending end side of the liner mouth portion.
(3) A tip outer peripheral portion of the fixed region portion is tapered.

  The pressure vessel of the present invention has a fixed region portion and a general region portion. At least a part of the outer peripheral surface of the fixed region portion is exposed on the outer periphery of the liner opening. Therefore, at least a part of the outer peripheral surface of the fixed region portion comes into contact with the mold surface of the mold during insert molding. Since the axial length of the fixed region is larger than the thickness of the insert ring, a sufficient contact area between the mold surface of the mold and the insert ring can be secured. Therefore, according to the pressure vessel of the present invention, the displacement of the insert ring during molding is suppressed, and the production loss can be reduced.

  Hereinafter, unless otherwise specified, in this specification, “the diameter of a circle surrounding the radially outer end portion in the radial section of the fixed region portion” is referred to as “the outer diameter of the fixed region portion”. In addition, “the diameter of a circle that forms a radially outer end portion in the radial section of the general region portion” is referred to as “the outer diameter of the general region portion”. In the pressure vessel of the present invention, the outer diameter of the general region portion is smaller than the outer diameter of the fixed region portion. Therefore, the general region portion is integrated inside the liner portion (more specifically, the liner mouth portion). Therefore, the insert ring is firmly integrated with the liner portion. That is, according to the pressure vessel of the present invention, the insert ring and the liner portion can be firmly integrated without cutting the insert ring or the like, so that the manufacturing cost can be reduced.

  In the pressure vessel of the present invention having the above (1), since the insert ring is manufactured at low cost, the entire pressure vessel is also manufactured at low cost.

  In the pressure vessel of the present invention having the above (2), the small-diameter general region portion is disposed on the proximal end side of the liner mouth portion, and the large-diameter fixed region portion is disposed on the distal end side of the liner mouth portion. When insert-molding the liner portion, it is possible to secure a sufficient resin flow path particularly on the outer peripheral surface side of the liner mouth portion. For this reason, the general region portion can be integrated with the liner opening portion with high reliability, and a pressure vessel in which the liner portion and the insert ring are firmly integrated can be easily manufactured. Further, since the liner portion and the insert ring can be easily integrated, the manufacturing loss of the pressure vessel can be reduced, and the manufacturing cost of the pressure vessel can be reduced.

  According to the pressure vessel of the present invention having the above (3), the insert ring can be easily inserted and placed in the mold.

It is sectional drawing which represents typically a mode that the pressure vessel of Example 1 was cut | disconnected in the axial direction. It is a principal part enlarged view of FIG. It is sectional drawing which represents typically a mode that the insert ring in the pressure vessel of Example 1 was cut | disconnected in the axial direction. It is explanatory drawing which represents typically the insert molding process in the manufacturing method of the pressure vessel of Example 1. FIG. It is explanatory drawing which represents typically the insert molding process in the manufacturing method of the pressure vessel of Example 1. FIG. It is explanatory drawing which represents typically the 2nd form of the insert ring in the pressure vessel of this invention. It is explanatory drawing which represents typically the 2nd form of the insert ring in the pressure vessel of this invention. It is explanatory drawing which represents typically the 3rd form of the insert ring in the pressure vessel of this invention. It is explanatory drawing which represents typically the 3rd form of the insert ring in the pressure vessel of this invention. It is explanatory drawing which represents typically the 3rd form of the insert ring in the pressure vessel of this invention.

Hereinafter, the pressure vessel of the present invention will be described with specific examples.
(Example)

  The pressure vessel of an Example is a fuel tank for motor vehicles, and is provided with said (1)-(3). 1 to 3 are sectional views schematically showing the pressure vessel of the embodiment, and FIGS. 4 and 5 are explanatory views schematically showing the manufacturing method of the pressure vessel of the embodiment. Specifically, FIG. 1 is a cross-sectional view schematically showing a state where the pressure vessel of the embodiment is cut in the axial direction. 2 is an enlarged view of the main part of FIG. 1. More specifically, FIG. 2 shows a base part, an insert ring, an O-ring, and a liner part and a reinforcing part located in the vicinity of the pressure vessel shown in FIG. Represent. FIG. 3 is a cross-sectional view schematically showing a state where the insert ring in the pressure vessel of the embodiment is cut in the axial direction. 4 and 5 schematically show the insert molding process in the method of manufacturing a pressure vessel of the embodiment. Specifically, the mold used in the insert molding process, and the die part and the insert ring in the mold are schematically shown. Represent. More specifically, FIG. 4 shows a state where the mold is opened, and FIG. 5 shows a state where the mold is closed. Hereinafter, in the examples, “up”, “down”, “front”, and “rear” refer to “up”, “down”, “front”, and “rear” shown in the drawings. An axial direction is the same direction as the front-back direction shown in each figure. In addition, the axial direction of a nozzle | cap | die part, an insert ring, an O-ring, and the whole pressure vessel corresponds.

  The pressure vessel of Example 1 has a vessel body 1, a base portion 2, an insert ring 3 and an O-ring 4. The container body 1 has a cylindrical shape (hollow shape) having a base portion at two ends in the axial direction (front-rear direction in FIG. 1) and having a reduced diameter. The container body 1 has a reinforcing part 10 and a liner part 11. The liner portion 11 is made of EVOH (ethylene-vinyl alcohol copolymer resin) having excellent gas barrier properties. The reinforcing portion 10 is made of FRP containing carbon fibers and an epoxy resin, and is wound around the outer periphery of the liner portion 11. That is, the liner portion 11 covers the inner peripheral surface of the reinforcing portion 10.

  The two end portions in the axial direction of the container body 1 are integrated with a base portion 2 in which an opening portion 15 is formed and a base portion 2 (2b) that is sealed without being formed with an opening portion. . The base part 2 is made of metal and has a boss part 20 and a flange part 21. The boss 20 has a cylindrical shape. A screw groove (not shown) is formed in a portion of the inner peripheral surface of the boss portion 20 on the outer side in the axial direction (the front side in FIG. 1) of the container body 1. The flange portion 21 protrudes from the outer peripheral surface of the boss portion 20 in the outer peripheral direction. In the pressure vessel according to the first embodiment, the flange portion 21 has an annular shape that is continuous with the entire outer periphery of the boss portion 20. The base extension part 22 which is the rear part of the boss part 20 extends further to the rear side than the flange part 21. A valve (not shown) is detachably attached to one base part 2 (front base part in FIG. 1).

The liner portion 11 includes a flange bottom seal portion 110, a liner mouth portion 111, and a general portion 113. As shown in FIG. 2, the flange bottom seal portion 110 covers the bottom surface 210 of the flange portion 21. The liner mouth portion 111 covers the outer peripheral surface 220 of the mouthpiece extension portion 22. The general part 113 is another part.
An annular groove-shaped O-ring holding groove 221 is formed on the outer peripheral surface of the base extension 22. An O-ring 4 is inserted into the O-ring holding groove 221.

  As described above, the outer peripheral surface 220 of the base extension part 22 is covered with the liner mouth part 111 which is a part of the liner part 11. The insert ring 3 is integrated with the liner opening 111. The insert ring 3 has an endless ring shape, and is formed by press-molding a metal plate ring (short cylinder). Specifically, the insert ring 3 is made of SUS 316L, which is a kind of austenitic stainless steel. SUS 316L is known to hardly cause hydrogen embrittlement, and is preferably used as a pressure vessel material using liquid hydrogen as a pressurized substance. Note that SUS 316L is a name according to the JIS standard and is substantially the same as 316L according to the ASTM standard.

  The insert ring 3 includes a general region portion 30 that is one end portion in the axial direction (end portion on the front side in FIGS. 2 and 3) and a fixed region portion 31 that is the other end portion (end portion on the rear side in FIGS. 2 and 3). And a contact area 32 that connects the general area 30 and the fixed area 31. The general region portion 30 has a straight tubular shape having a substantially constant radial cross-sectional area. The fixed region portion 31 also has a straight tubular shape. As shown in FIGS. 2 to 5, as shown in FIGS. 2 to 5, the tip outer peripheral portion 3 c (that is, the rear end portion in FIGS. 2 to 5 and the outer periphery of the fixed region portion 31). The portion corresponding to the portion is tapered.

The outer diameter of the fixed region portion 31 is larger than the outer diameter of the general region portion 30. The connecting region 32 that connects the fixed region 31 and the general region 30 has a tapered shape that connects the fixed region 31 and the general region 30 in a stepped shape. The thicknesses of the general region portion 30, the fixed region portion 31, and the communication region portion 32 are substantially the same. The general region portion 30 and the communication region portion 32 are embedded in the liner mouth portion 111. The outer peripheral surface 310 of the fixed region portion 31 is substantially flush with the outer peripheral surface 111 b of the liner port portion 111, and the entire outer peripheral surface 310 of the fixed region portion 31 is exposed to the outer periphery of the liner port portion 111. The other part of the fixed region portion 31 is in contact with the liner opening 111.
The pressure vessel of an Example is manufactured as follows.

  First, as shown in FIG. 4, the insert ring 3 is placed on the mold surface 5 a for molding the outer peripheral surface 111 b of the liner port 111 in the mold 5. The mold surface 5a is recessed in a mortar shape. The insert ring 3 is inserted into the concave mold surface 5a. Since the axial length L1 of the fixed region portion 31 is larger than the wall thickness W1 of the insert ring 3, the outer peripheral surface 310 of the fixed region portion 31 abuts on the mold surface 5a with a sufficient area. The outer diameter of the fixed region 31 of the insert ring 3 is formed slightly smaller than the inner diameter of the mold surface 5a. For this reason, when the insert ring 3 is set in the mold 5, a gap is generated between them by the difference between the outer diameter of the fixed region portion 31 and the inner diameter of the mold surface 5 a. In the pressure vessel, the general region portion 30 is embedded in the liner port portion 111. Therefore, the outer diameter of the general region portion 30 is smaller than the inner diameter of the mold surface 5b facing the general region portion 30 in the mold 5, and the outer surface 300 of the general region portion 30 and the mold surface 5b A relatively large gap is formed between them. Further, the mold surface 5b has a taper shape for improving the mold release property. Therefore, when the insert ring 3 is placed on the mold 5, the insert ring 3 is directed in the direction of the arrow in FIG. 4 with the lower end 3 </ b> A on the general region portion 30 side in the fixed region portion 31 as the center (in FIG. 4). Try to tilt (counterclockwise). However, at this time, the upper end portion 3 </ b> B located on the distal end side of the fixed region portion 31 in the insert ring 3 interferes with the mold surface 5 a of the mold 5. For this reason, the tilting of the insert ring 3 stops, and the insert ring 3 is stably held by the mold 5. The longer the axial length L1 of the portion of the insert ring 3 that contacts the mold surface 5a (fixed region portion 31), the easier the upper end 3B and the mold surface 5a interfere with each other, and the tilt of the insert ring 3 described above. Can be suppressed with high reliability. Accordingly, the axial length L1 of the fixed region portion 31 has a preferable range. Specifically, the axial length L1 of the fixed region portion 31 is preferably equal to or longer than the axial length L3 of the mold surface 5a, and more preferably exceeds the axial length L3 of the mold surface 5a. The upper limit value of the axial length L3 of the mold surface 5a is not particularly limited, but can be appropriately set to such a length that the release resistance of the liner portion 11 in which the insert ring 3 is integrated is not excessive.

  Note that, as described above, the distal end outer peripheral portion 3c of the fixed region portion 31 serving as the insertion start end of the insert ring 3 is tapered. For this reason, the insert ring 3 can be easily inserted into the mold surface 5 a of the mold 5. Moreover, the mold surface is not damaged.

  Thereafter, the mold on which the insert ring 3 is placed is closed as shown in FIG. 5 to form the cavity 500 for the liner portion 11. EVOH (hereinafter simply referred to as a molten resin) melted or softened is injected into the cavity 500 from the gate (not shown) of the mold 5 to mold the liner portion 11.

  Thereafter, the mold 5 is opened as shown in FIG. 4, and a molded body (not shown) in which the liner portion 11 and the insert ring 3 are integrated is taken out. Then, the base part 2 fitted with the O-ring 4 is inserted into the liner mouth part 111. Then, as shown in FIGS. 1 and 2, the pressure vessel of the embodiment in which the O-ring 4 is pressed against the liner opening 111 and the liner opening 111 is reinforced by the insert ring 3 is obtained.

  As shown in FIGS. 1 and 2, the general region 30 of the insert ring 3 is integrated into the liner opening 111, whereby the insert ring 3 and the liner opening 111 are firmly integrated. For this reason, the liner opening 111 can be stably reinforced by the insert ring 3.

  The axial length L1 of the fixed region portion 31 in the insert ring 3 only needs to be larger than the wall thickness W1 of the insert ring 3, and the stability of the insert ring 3 during molding and the insert ring 3 and the liner portion 11 (liner It can be appropriately set in consideration of the integrity with the mouth portion 111). Considering the stability of the insert ring 3 at the time of molding, as described above, the axial length L1 of the fixed region 31 is preferably equal to or greater than the axial length L3 of the mold surface 5a.

  The insert ring 3 only needs to be higher in rigidity than the liner portion 11 and the material thereof is not particularly limited. However, when the material is limited by law, the insert ring 3 may be appropriately selected within the range. For example, when the pressure vessel contains hydrogen as a pressurized substance, SUS316L which is a kind of stainless steel or A6061 (T6) which is a kind of aluminum alloy can be used as the material of the insert ring 3.

  The insert ring 3 may be molded by a method other than press molding, but it is preferable to press mold in consideration of a reduction in manufacturing cost. The insert ring 3 only needs to have a shape (that is, a cylindrical shape) having a length in the axial direction, and the axial length is not particularly limited.

  Further, the insert ring 3 may be formed integrally with the liner opening 111 and the position thereof is not particularly limited, but it is preferable that at least a part of the insert ring 3 faces the O-ring 4. Further, it is particularly preferable that the general region portion 30 faces the O-ring 4 among the insert rings 3. Since the general region portion 30 is integrated inside the liner mouth portion 111 and both the radially inner side and the radially outer side are covered with the liner mouth portion 111, the portion that is firmly integrated with the liner mouth portion 111. It is. By receiving the pressing force by the O-ring 4 in the general region portion 30, the liner port portion 111 can be reinforced more reliably.

  The shape of the insert ring 3 is not limited to the shape of the embodiment. For example, the general region portion 30 is not limited to a straight tube shape, and may have a tapered shape in which the outer peripheral surface 300 expands toward the fixed region portion 31 as shown in FIGS. Also in this case, the insert ring 3 can be stably held on the mold surface 5 a of the mold 5. In this case as well, the axial length of the fixed region 31 is preferably set to be equal to or longer than the axial length L3 of the mold surface 5a, and is set to a length exceeding the axial length L3 of the mold surface 5a. Is more preferable. By making the fixing region portion 31 such a length, the insert ring 3 can be more stably held by the mold surface 5 a of the mold 5.

  Alternatively, the radial section of the fixed region portion 31 and / or the general region portion 30 may not be a perfect circle. For example, as shown in FIGS. 8 to 10, only a part of the circumferential direction (convex portion 31 x) of the fixed region portion 31 having a substantially straight tubular shape as a whole may protrude outward in the radial direction. In this case, as shown in FIG. 8, the cross section in the radial direction of the fixed region portion 31 has an uneven shape. The plurality of convex portions 31 x in the fixed region portion 31 are arranged while being separated from each other along the circumferential direction of the fixed region portion 31. Adjacent convex portions 31x are smoothly continuous with portions (concave portions 31y) other than the convex portions 31x in the fixed region portion 31.

  In this case, in the radial cross section of the fixed region portion 31, the protruding end portions 31 a to 31 i of the convex portion 31 x constitute the radial direction outer end portion of the fixed region portion 31. The protruding end portions 31a to 31i are arranged on the circumference of a circle O indicated by a two-dot chain line in FIG. The diameter of the circle O is larger than the diameter of a circle that wraps around the radially outer end portion in the radial section of the general region portion 30. In addition, in the insert ring 3 shown in FIGS. 8-10, the general area | region part 30 makes a straight tube shape. For this reason, the circle that forms the radially outer end in the radial cross section of the general region portion 30 corresponds to the radial cross section of the outer peripheral surface 300 of the general region portion 30.

  If the diameter of the circle O is larger than the diameter of the radial cross section of the outer peripheral surface 30x of the general region portion 30, a part of the outer peripheral surface 310 in the fixed region portion 31 is on the outer periphery of the liner mouth portion 111 as shown in FIG. The other portion of the fixed region 31 that is exposed can be brought into contact with the liner opening 111. Accordingly, also in this case, a part of the outer peripheral surface 310 of the fixed region portion 31 can be brought into contact with the mold surface of the molding die during insert molding, and the displacement of the insert ring 3 during molding can be shifted as in the first embodiment. Can be suppressed. In addition, since the fixed region portion 31 has a concavo-convex shape having the convex portions 31 x, the strength of the fixed region portion 31 is increased, and there is an advantage that the liner port portion 111 can be reinforced more strongly by the fixed region portion 31. Furthermore, by making the fixed region portion 31 uneven, the contact area between the fixed region portion 31 and the liner port portion 111 can be increased, and the advantage that the fixed region portion 31 and the liner port portion 111 can be integrated more firmly is also provided. is there.

  In addition, since the general region portion 30 having a diameter smaller than the diameter of the circle O is integrated in the liner opening 111, the insert ring 3 and the liner opening 111 can be firmly integrated as in the first embodiment. The liner opening 111 can be stably reinforced by the insert ring 3.

  The general region portion 30 may have a concavo-convex shape similarly to the fixed region portion 31, but in order to apply a substantially uniform surface pressure to the liner mouth portion 111, the general region portion 30 has a straight tubular shape. preferable. The diameter of the circle surrounding the radially outer end in the radial cross section of the general region portion 30, that is, the outer diameter of the general region portion 30 only needs to be smaller than the diameter of the circle O, that is, the outer diameter of the fixed region portion 31. It may be larger than the inner diameter of the fixed region portion 31. In any case, the general region portion 30 may be embedded in the liner mouth portion 111. In other words, the inner diameter of the general region portion 30 may be larger than the inner diameter of the liner port portion 111, and the outer diameter of the general region portion 30 may be smaller than the outer diameter of the liner port portion 111.

  By the way, in the insert ring 3 shown in FIGS. 8-10, the fixed area | region part 31 has the some convex part 31x and the recessed part 31y which connects the adjacent convex part 31x. In the case where the fixed region portion 31 has such a concavo-convex shape, it is necessary to form the liner mouth portion 111 also on the outer peripheral side of the concave portion 31y, that is, between the adjacent convex portions 31x. This is because the thickness of the liner opening 111 in the vicinity of the fixed region 31 is made sufficiently large. In this case, the recess 31y is preferably provided with a flow passage for the molding material from the inner periphery side to the outer periphery side of the recess 31y. Specifically, it is the circulation opening 33 shown in FIGS. By providing the circulation opening 33 in the recess 31y, as shown in FIG. 10, the liner opening 111 can be present on the inner peripheral side and the outer peripheral side of the recess 31y. The shape and number of the flow openings 33 provided in each recess 31y are not particularly limited. When a plurality of flow openings 33 are provided in each recess 31 y, the plurality of flow openings 33 provided in the same recess 31 y may be arranged in the circumferential direction of the fixed region portion 31, or the axial direction of the fixed region portion 31. May be arranged in In addition, since the liner opening part 111 enters also into the distribution opening 33 by providing the distribution opening 33, there is an advantage that the liner opening part 111 and the insert ring 3 can be integrated more firmly.

  The liner portion 11 in the pressure vessel of Example 1 is made of EVOH, but the material of the liner portion 11 in the pressure vessel of the present invention may be appropriately selected according to the pressurized substance to be filled. For example, PPS (polyphenylene sulfide), polyethylene, nylon, or the like is preferably used as the material of the liner portion 11.

  The reinforcing portion 10 in the pressure vessel of Example 1 is made of FRP containing carbon fiber and epoxy resin, but glass fiber or aramid fiber may be used instead of carbon fiber.

  The pressure vessel of the present invention can be preferably used as a pressure vessel for filling various liquefied gases such as hydrogen gas, CNG, LNG, and LPG. It can be particularly preferably used as an on-vehicle pressure vessel.

1: Container body 2: Base part 3: Insert ring 4: O-ring 5: Mold 5a: Mold surface 10: Reinforcement part 11: Liner part 15: Opening part 30: General area part 31: Fixed area part 31X: Convex part 31y: Concavity 33: Distribution opening 111: Liner mouth part 111a: Extender end 111b of liner mouth part: Outer peripheral surface of liner mouth part 310: Outer peripheral surface of fixed region part

Claims (4)

A hollow container body having an opening, and a base part forming the periphery of the opening,
The inner peripheral surface of the container body is composed of a resin liner,
The liner portion has a liner mouth portion that is disposed on the outer peripheral side of the mouthpiece portion and extends toward the inside of the container body, and an O-ring is disposed between the mouthpiece portion and the liner mouth portion. A pressure vessel comprising:
An insert ring having a ring shape that is higher in rigidity than the liner portion is integrally formed in the liner mouth portion,
The insert ring has a fixed region portion that is a partial region in the axial direction, and a general region portion that is another partial region in the axial direction,
The diameter of the circle that wraps around the radially outer end in the radial section of the fixed region is larger than the diameter of the circle that wraps around the radially outer end of the general region.
At least a part of the outer peripheral surface of the fixed region portion is exposed to the outer periphery of the liner mouth portion,
A pressure vessel in which the axial length of the fixed region portion is larger than the thickness of the insert ring.   The pressure vessel according to claim 1, wherein the insert ring is made of metal and is pressed.   The pressure vessel according to claim 1 or 2, wherein the general region portion is disposed on a proximal end side of the liner port portion, and the fixed region portion is disposed on an extending end side of the liner port portion.   The pressure vessel according to any one of claims 1 to 3, wherein a tip outer peripheral portion of the fixed region portion has a tapered shape.

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