JP2006307947A - Manufacturing method for high pressure gas storage vessel and high pressure gas storage vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a high pressure storage vessel winding many reinforcing members around a shoulder part to increase mechanical strength of an end part, in particular, the shoulder part having reduced thickness of a reinforcing layer. <P>SOLUTION: In this manufacturing method for the high pressure gas storage vessel 15 manufactured by winding the belt-like reinforcing members 13 around a peripheral face of a liner after molding the liner 4 into a tank shape, a wind-around auxiliary member 6 covering at least the shoulder part 4C of the liner to increase the number of windings of the reinforcing member 13 wound around the shoulder part 4C is attached to a part in the vicinity of boundary of a barrel part 4A and the end part 4B of the liner, and the reinforcing member 13 is also wound around the wind-around auxiliary member 6 when winding the reinforcing member 13 around the peripheral face of the liner. The wind-around auxiliary member 6 is provided with a liner contact face 7 adhered closely to a liner mounting part, an inclined face 8 around which the reinforcing member is wound in hoop winding, and a curvature face 9 covering the shoulder part 4C around which the reinforcing member is wound in helical winding. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a high-pressure gas storage container for filling and storing various gases and a high-pressure gas storage container, and more particularly, to a technique for increasing the amount of winding of a reinforcing member around a container shoulder.

  For example, as a gas storage container for storing gas, a belt-like carbon fiber is wound around the circumferential surface of a tank-shaped liner to increase the mechanical strength (pressure resistance) of the container, and this is used as a reinforcing layer. A pressure vessel has been proposed (see, for example, Patent Documents 1 and 2).

The carbon fiber is wound around the cylindrical body by a hoop wound around its circumference, and the mirror part, which is a curvature-shaped part (dome-shaped part) at both ends of the body, is on the diagonal in the container longitudinal direction. It is wound with a helical winding.
Japanese Patent Laid-Open No. 10-220691 JP 2002-188794 A

  By the way, in this type of pressure vessel, the pressure resistance of the vessel is increased by winding carbon fibers around the circumferential surface of the liner, but the thickness of the reinforcing layer of the mirror part is larger than the thickness of the reinforcing layer of the body part. In particular, the pressure resistance of the shoulder portion close to the trunk portion of the mirror portion is lower than other portions.

  In other words, because the mirror part, which has a curved shape, winds the carbon fiber helically because of its structure, the number of turns of the carbon fiber is inevitably reduced compared to the body part, and compared with other parts. The strength of the mirror part (especially the shoulder part) is relatively lowered, and the pressure resistance of the entire container cannot be ensured.

  Accordingly, the present invention provides a method for producing a high-pressure gas storage container and a high-pressure gas storage, in which a reinforcing member can be wound around the shoulder portion in order to increase the mechanical strength of the mirror portion, particularly the shoulder portion, in which the thickness of the reinforcing layer is reduced. The purpose is to provide a container.

  In the method for manufacturing a high-pressure gas storage container according to the present invention, winding around the boundary between the body portion and the mirror portion of the liner at least covers the shoulder portion of the liner and increases the number of turns of the reinforcing member wound around the shoulder portion. After attaching the auxiliary means, when the reinforcing member is wound around the peripheral surface of the liner, the reinforcing member is also wound around the winding auxiliary means.

  On the other hand, a high-pressure gas storage container according to the present invention comprises a tank-shaped liner and a reinforcing layer formed by winding a belt-like reinforcing member around the peripheral surface of the liner. Winding assisting means for covering at least the shoulder of the liner and increasing the number of turns of the reinforcing member wound around the shoulder is provided in the vicinity of the boundary.

  According to the method for manufacturing a high-pressure gas storage container of the present invention, the reinforcing member is also wound on the winding auxiliary means attached so as to cover the shoulder portion of the liner, and the reinforcement wound on the winding auxiliary means. By the member, the number of windings of the reinforcing member in the shoulder can be increased. Therefore, according to the method of the present invention, the strength of the shoulder can be increased, and the pressure resistance strength of the entire container can be made uniform.

  On the other hand, according to the high-pressure gas storage container of the present invention, the winding auxiliary means for increasing the number of windings of the reinforcing member wound around the shoulder portion of the liner is provided so as to cover at least the shoulder portion. By increasing the number of reinforcing members to be attached, the number of windings of the reinforcing member at the shoulder can be increased, and the strength of the shoulder can be increased.

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

  1 is a molding process diagram for molding a liner, FIG. 2 is a diagram of a groove forming process for forming a groove on the outer peripheral surface of the liner after molding, FIG. 3 is a perspective view of a winding auxiliary means, and FIG. FIG. 5 is a cross-sectional view, FIG. 5 is a mounting process diagram for mounting the winding auxiliary means on the liner, FIG. 6 is a winding process chart for helically winding the reinforcing member on the winding auxiliary means, and FIG. 7 is a completed high-pressure gas storage container. FIGS. 8A and 8B are winding process diagrams when the reinforcing member is wound without providing the winding auxiliary means.

  To manufacture the high-pressure gas storage container according to the present embodiment, first, as shown in FIG. 1A, a disk-shaped metal plate made of, for example, an aluminum alloy that serves as a base material for a liner for forming into a tank shape. Prepare 1 Next, this metal plate 1 is press-molded to form a cylindrical body 2 having an upper end opened as shown in FIG. Next, the opening side of the cylindrical body 2 is squeezed to complete the liner 4 having the base 3 as shown in FIG.

  In this embodiment, the liner 4 is manufactured in a tank shape by press-molding the metal plate 1, but the liner 4 may be manufactured by resin molding.

  Next, with respect to the liner 4, as shown in FIG. 2, the vicinity of the boundary between the barrel portion 4A which is a cylindrical portion and the mirror portion 4B which is a curved portion (dome shape portion) at both ends of the barrel portion 1A. Then, the hooking groove 5 is formed along the circumferential direction at a position near the body portion 4A. Two hook grooves 5 are formed on the base 3 side and the bottom side, respectively. Further, the hook groove 5 has a groove depth that does not impair the mechanical strength (pressure resistance, etc.) of the liner 4, for example, a depth of about 1 mm at the maximum.

  Next, a winding auxiliary member 6 which is a winding auxiliary means for attaching to the vicinity of the boundary between the body portion 4A and the mirror portion 4B of the liner 4 is prepared. As shown in FIGS. 3 and 4, the winding auxiliary member 6 covers at least the shoulder portion 4 </ b> C close to the body portion 4 </ b> A of the mirror portion 4 </ b> B, and winds the reinforcing member around the liner circumferential surface in the reinforcing layer forming step described later. In addition, it is used to increase the number of windings of the reinforcing member wound around the shoulder 4C.

  The winding auxiliary member 6 is a ring-shaped member provided with a slit 6A, and the inner periphery is slightly shorter than the outer periphery of the liner in a state where the slit 6A is closed. It has a structure to hold down. In addition, the winding auxiliary member 6 can further press the tank 4 by winding and tightening fibers around the periphery. The winding auxiliary member 6 includes a liner contact surface 7 that is in close contact with the mounting portion of the liner 4, an inclined surface 8 that is wound during hoop winding for winding the reinforcing member in the circumferential direction of the liner 4, and a reinforcing member. And a curvature surface 9 that covers the shoulder portion 4 </ b> C wound at the time of helical winding wound around the diagonal line of the liner 4 in the longitudinal direction.

  The liner contact surface 7 is composed of a straight line and a curved line that are in close contact with the shapes of the body portion 4A, the shoulder portion 4C, and the mirror portion 4B, and is in close contact with these mounting portions without any gaps.

  The inclined surface 8 has a gentle gentle slope so that its thickness gradually increases from the body portion 4A to the shoulder portion 4C. A reinforcing member is wound around the inclined surface 8 when the trunk portion 4A is hoop-wound. The inclined surface 8 and the curvature surface 9 are formed with a slip-preventing groove 10 for preventing the reinforcing member from sliding off. The anti-skid groove 10 is formed as a shallow groove in an annular shape along the circumferential direction, and a plurality of anti-skid grooves 10 are formed at a predetermined pitch in the inclined direction.

  The curvature surface 9 is a curved surface on which more reinforcing members are wound when the reinforcing member is helically wound around the liner 4. The curvature surface 9 is formed with a curvature that becomes thicker from the inclined surface 8 to the shoulder portion 4C, and gradually becomes thinner from there, and the tip thereof coincides with the curvature of the mirror portion 4B. It is like that.

  Further, the winding auxiliary member 6 includes an engaging protrusion 11 which is a protrusion locked to the hooking groove 5 formed in the liner 4 and an elasticity applying piece 12 having the engaging protrusion 11 at the tip. Is formed. The elasticity applying piece 12 is formed into a tongue piece shape by a slit formed in the main body of the winding assisting member 6 and applies an elastic force to the engaging projection 11 formed at the tip thereof. The engaging protrusion 11 protrudes toward the inside of the winding assisting member 6 and is not easily detached from the hooking groove 5 by the elastic force of the elasticity applying piece 12 by being inserted and engaged with the hooking groove 5. It is made like.

  The winding auxiliary member 6 is the same as the liner 4 in order to follow the expansion of the liner 4 at the time of filling since the container is filled with fuel gas and prevent damage due to the difference in thermal expansion amount with the liner 4. Formed by material.

  Next, as shown in FIG. 5, the ring-shaped winding auxiliary member 6 is slid from the base 3 side and the bottom side of the liner 4 to the body 4A. Then, these winding auxiliary members 6 are slid until the engaging protrusions 11 are fitted into the hooking grooves 5 formed in the liner 4. Then, the engaging protrusion 11 engages with the hooking groove 5 and is urged by the elasticity applying piece 12 to prevent the hooking groove 5 from coming out easily. Further, the winding auxiliary member 6 has one slit 6A, and the inner circumference is 3 to 5 mm shorter than the outer circumference of the liner. Therefore, by utilizing the material elastic force of the winding auxiliary member 6 The liner 4 can be pressed down.

  Next, the belt-shaped reinforcing member 13 is wound around the peripheral surface of the liner 4. As the reinforcing member 13, for example, a CFRP layer (Fiber Reinforced Plastics), which is a fiber reinforced plastic material using carbon fibers as reinforcing fibers, is used as a band.

  An example of winding the reinforcing member 13 onto the liner 4 is shown in FIG. FIG. 8 shows a general winding method and shows a state where the reinforcing member 13 is wound in a state where the winding auxiliary member 6 of the present embodiment is not attached to the liner 4.

  As shown in FIG. 8 (a), the body 4A of the liner 4 is hoop-wrapped to wind the reinforcing member 13 in the circumferential direction, and the reinforcing member 8 is diagonally disposed in the container longitudinal direction at the mirror portions 4B at both ends thereof. Helical winding around the top. Further, in order to wind the reinforcing member 13 around each of the body portion 4A and the mirror portion 4B, the belt-shaped reinforcing member 13 is immersed in an epoxy resin bag, and then the liner 4 is wound around the circumferential surface thereof while rotating.

  In such a winding process, as shown in FIG. 8B, the reinforcing member 13 does not always reach the shoulder 4C on the opposite side of the shoulder 4C close to the body 4A in the mirror 4B. Therefore, the thickness of the reinforcing layer of the shoulder 4C is the thinnest. That is, in helical winding, the reinforcing member 13 cannot be wound to such an extent that the strength of the shoulder portion 4C can be sufficiently secured, so the shoulder portion 4C is inevitably the weakest portion. In order to avoid this, it is conceivable to increase the thickness of the shoulder portion 4C in order to increase the pressure resistance of the liner 4, but there is a surplus in another portion of the mirror portion 4B, and the container is more than necessary. Become heavier.

  Therefore, in the present embodiment, when the reinforcing member 13 is wound around the peripheral surface of the liner 4, the reinforcing member 13 is also wound on the winding auxiliary member 6. At the time of hoop winding, the reinforcing member 13 is wound not only on the peripheral surface of the liner 4 but also on the inclined surface 8 of the winding auxiliary member 6. At this time, since the slip prevention groove 10 is formed on the inclined surface 8, the reinforcing member 13 wound thereon is prevented from slipping down.

  Then, at the time of helical winding, when the reinforcing member 13 is wound around the mirror portion 4B, the reinforcing member 13 is also wound on the curvature surface 9 of the winding auxiliary member 6 as shown in FIG. By doing in this way, since the curvature surface 9 is made into the surface made into the curvature shape which is easy to wind the reinforcement member 13, more reinforcement members 13 are wound around the shoulder part 4C. As a result, the reinforcing member 13 having an amount sufficient to ensure sufficient pressure resistance can be wound around the shoulder portion 4C where it is difficult to wind the reinforcing member 13 due to the structure of the tank.

  By performing hoop winding and helical winding as described above, the high-pressure gas storage container 15 in which the reinforcing layer 14 is formed by winding a plurality of reinforcing members 13 around the peripheral surface of the liner 4 is manufactured.

  According to the high pressure gas storage container 15 manufactured in this way, the winding auxiliary member 6 that covers at least the shoulder 4C of the liner 4 is provided in the vicinity of the boundary between the body 4A and the mirror 4B of the liner 4. It is possible to wind the reinforcing member 13 in an amount sufficient to secure sufficient pressure resistance to the shoulder portion 4C when helically wound (a target thickness can be secured), and the shoulder portion 4C. The pressure resistance strength of the container can be improved, and the pressure resistance of the entire container can be made uniform.

  Further, according to the high-pressure gas storage container 15 of the present embodiment, since the winding auxiliary member 6 has a ring shape, the reinforcing layer 14 of the shoulder 4C can be thickened uniformly around the entire circumference.

  Further, according to the high-pressure gas storage container 15 of the present embodiment, the reinforcing member 13 can be wound around the inclined surface 8 of the winding auxiliary member 6 during hoop winding, and the reinforcing member is attached to the curvature surface 9 during helical winding. 13 can be wound more. Further, the slip-off preventing groove 10 formed on the inclined surface 8 can prevent the reinforcing member 13 wound around the inclined surface 8 from falling off.

  Further, according to the high-pressure gas storage container 15 of the present embodiment, the engagement protrusion 11 of the winding auxiliary member 6 is engaged with the hook groove 5 formed on the peripheral surface of the liner 4. The auxiliary member 6 can be securely fixed to the liner 4, and the winding auxiliary member 6 can be easily positioned with respect to the liner 4.

  The specific embodiment to which the present invention is applied has been described above. However, the above-described embodiment is an example, and the present invention is not limited to the above-described embodiment.

It is a shaping | molding process figure which shape | molds a liner. It is a groove | channel formation process figure which forms a groove | channel in the outer peripheral surface of the liner after shaping | molding. It is a perspective view of a winding auxiliary means. It is sectional drawing of a winding assistance means. It is an attachment process figure which attaches a winding auxiliary means to a liner. It is a winding process figure which helically winds a reinforcement member on a winding auxiliary means. It is a figure which shows the completed high pressure gas storage container. It is a winding process figure when a reinforcing member is wound without providing a winding auxiliary means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Metal plate 2 ... Cylindrical body 3 ... Base 4 ... Liner 4A ... Trunk part 4B ... Mirror part 4C ... Shoulder part 5 ... Hatch groove 6 ... Winding auxiliary member (winding auxiliary means)
7 ... Liner contact surface 8 ... Inclined surface 9 ... Curvature surface 10 ... Sliding prevention groove (groove)
11 ... engaging protrusion (protrusion)
13 ... Reinforcing member 14 ... Reinforcing layer 15 ... High-pressure gas storage container

Claims (6)

In a method for manufacturing a high-pressure gas storage container manufactured by forming a liner into a tank shape and then winding a belt-shaped reinforcing member around the peripheral surface of the liner,
At least the shoulder portion of the liner is covered near the boundary between the body portion and the mirror portion of the liner, and a winding auxiliary means for increasing the number of turns of the reinforcing member wound around the shoulder portion is attached,
When the reinforcing member is wound around the peripheral surface of the liner, the reinforcing member is also wound around the winding auxiliary means. In a high-pressure gas storage container comprising a tank-shaped liner and a reinforcing layer formed by winding a belt-shaped reinforcing member around the peripheral surface of the liner,
A high-pressure gas is provided in the vicinity of the boundary between the body portion and the mirror portion of the liner, covering at least the shoulder portion of the liner and increasing the number of windings of the reinforcing member wound around the shoulder portion. Storage container. The high-pressure gas storage container according to claim 2,
The high-pressure gas storage container, wherein the winding auxiliary means has a ring shape that is slid and mounted from the base side and the bottom side of the liner to the body. The high-pressure gas storage container according to claim 2 or 3,
The winding assisting means includes a liner contact surface formed in close contact with the mounting portion of the liner, an inclined surface wound during hoop winding for winding the reinforcing member in a circumferential direction of the liner, and the reinforcing member as a liner. A high-pressure gas storage container comprising: a curved surface covering a shoulder wound during helical winding wound around a diagonal in the longitudinal direction. The high-pressure gas storage container according to claim 4,
A slip-preventing groove for preventing the reinforcing member from slipping is formed at least on the inclined surface. A high-pressure gas storage container according to any one of claims 2 to 5,
A protrusion is formed on the winding auxiliary means, and the protrusion is engaged with a groove formed on the outer peripheral surface of the liner.

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