JP2015075173A - Pressure container and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure container and a method of manufacturing the same such that a reinforcement layer having reinforcement fiber crossed can be easily formed on a surface.SOLUTION: A pressure container is provided with: a metallic liner 11 in a hollow doughnut shape; a first reinforcement layer 12 which covers the outside of the liner 11 by curing reinforcement fiber which is spirally continuous toward one side L in a peripheral direction B and an axial direction A of the liner 11 with resin; and a second reinforcement layer 13 which covers the outside of the liner 11 (first reinforcement layer 12) by curing reinforcement fiber which is spirally continuous toward the other side R in the peripheral direction B and the axial direction A of the liner 11 with resin.

Description

  The present invention relates to a pressure vessel that can contain a fluid having a pressure higher than atmospheric pressure, such as helium and oxygen, and a method for manufacturing the same.

  A pressure vessel that can contain a high-pressure fluid is generally configured by forming a reinforcing layer such as a fiber reinforced plastic on the outer peripheral surface of a metal liner having a base portion and having a hollow shape. In this case, the reinforcing layer is formed by a filament winding method. This filament winding method is a method in which reinforcing fibers impregnated with a resin are wound so as to intersect while applying tension to the surface of the liner, and the resin is cured and molded.

  As a conventional pressure vessel and its manufacturing method, what was described in the following patent documents 1-3 is proposed, for example.

Japanese Patent No. 4382536 Japanese Patent Publication No. 03-028301 Japanese Examined Patent Publication No. 04-037773

  By the way, as a shape of the pressure vessel, a cylindrical shape has been generally used. However, when the device on which the pressure vessel is mounted is a columnar shape, a donut-shaped pressure vessel having a hollow center may be more advantageous for mounting than a cylindrical pressure vessel. However, when manufacturing a doughnut-shaped pressure vessel, it is difficult to wind reinforcing fibers so as to cross while applying tension to the surface of the liner having a donut shape.

  This invention solves the subject mentioned above, and it aims at providing the pressure vessel which can form easily the reinforcement layer which a reinforcement fiber cross | intersects on the surface, and its manufacturing method.

  In order to achieve the above object, a pressure vessel according to the present invention comprises a metal liner having a hollow donut shape and a reinforcing fiber that is spirally continuous toward one side in the circumferential direction and the axial direction of the liner. A first reinforcing layer that is cured by the coating and covers the outer side of the liner, and reinforcing fibers that are spirally continuous in the circumferential direction of the liner and toward the other side in the axial direction are cured by the resin to cover the outer side of the liner And a second reinforcing layer to be coated.

  Therefore, the first reinforcing layer and the second reinforcing layer are wound around the outer peripheral surface of the liner in layers by reinforcing fibers continuous in a spiral toward one side and reinforcing fibers continuous in a spiral toward the other side. Is formed in a laminate, it is possible to easily form two reinforcing layers where reinforcing fibers intersect.

  In the pressure vessel of the present invention, the reinforcing fibers constituting the first reinforcing layer and the second reinforcing layer are constituted by a prepreg.

  Therefore, by using the prepreg, the reinforcing fiber can be easily wound around the outer peripheral surface of the liner in a spiral shape.

  Further, the pressure vessel manufacturing method of the present invention spirals the first reinforcing fiber impregnated with resin on the surface of a metal liner having a hollow donut shape in the circumferential direction of the liner and toward one side in the axial direction. A step of winding the second reinforcing fiber impregnated with resin around the surface of the first reinforcing fiber in the circumferential direction of the liner toward the other side in the axial direction, and the first reinforcing fiber Forming a first reinforcing layer and a second reinforcing layer by curing the liner on which the fiber and the second reinforcing fiber are wound.

  Accordingly, the reinforcing fiber is spirally wound around the outer peripheral surface of the liner toward one side, and the reinforcing fiber is wound spirally toward the other side of the liner. Since the reinforcing layers are formed by lamination, two reinforcing layers where the reinforcing fibers intersect can be easily formed.

  The pressure vessel manufacturing method of the present invention is a method of manufacturing a pressure vessel that is cured after winding reinforcing fibers impregnated with resin around the entire surface of a metal liner having a hollow donut shape, By repeating the partial winding process of inclining the fibers in the axial direction with respect to the circumferential direction of the liner and winding the fibers in a predetermined width spirally with a series of reinforcing fibers at a predetermined interval in the axial direction of the liner. The first winding step of winding the first reinforcing fiber layer around the entire surface of the liner, and the reinforcing fiber is inclined in a direction opposite to the inclination direction of the first winding step to form a spiral having a predetermined width. A second winding in which the second reinforcing fiber layer is wound around the entire surface of the liner by continuously repeating the partial winding step of winding with a series of reinforcing fibers at a predetermined interval in the axial direction of the liner. And having a process It is an feature.

  Accordingly, the spiral winding of the reinforcing fiber with the predetermined width in the partial winding process around the liner can maintain the tension of the reinforcing fiber because it is inclined, and the predetermined width within the range in which the reinforcing fiber does not loosen. Yes, it can be tightly wound so that the fibers are in contact with each other in a spiral. Therefore, the reinforcing fiber can be wound around the hollow donut-shaped liner without loosening by continuously repeating the partial winding step with a series of reinforcing fibers at intervals in the axial direction of the liner. In this case, the axial interval in the partial winding step is an interval position where the reinforcing fiber can be wound while maintaining the winding tension of the reinforcing fiber, and a series of reinforcing fibers of the interval are also stretched in contact with the liner surface. It will be. In addition, the winding of the reinforcing fiber with a predetermined width in the partial winding process is a dense winding, and the winding between the partial winding processes is a sparse winding compared to the dense winding, and the partial winding process The first reinforcing fiber layer and the second reinforcing fiber layer can be wound around the entire circumference of the liner without any gaps by repeating a number of times continuously with a series of reinforcing fibers at intervals in the circumferential direction of the liner. .

  According to the pressure vessel and the manufacturing method thereof of the present invention, two reinforcing layers in which reinforcing fibers intersect can be easily formed on the outside of a liner having a hollow donut shape.

FIG. 1 is a partially cutaway schematic view showing a pressure vessel according to an embodiment of the present invention. FIG. 2 is a flowchart showing the procedure of the pressure vessel manufacturing method of the present embodiment. FIG. 3 is a schematic view showing a method for manufacturing the pressure vessel of the present embodiment.

  Exemplary embodiments of a pressure vessel and a method for manufacturing the same according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a partially cutaway schematic view showing a pressure vessel according to one embodiment of the present invention, FIG. 2 is a flowchart showing the procedure of the pressure vessel manufacturing method of this embodiment, and FIG. 3 is the pressure of this embodiment. It is the schematic showing the manufacturing method of a container.

  The pressure vessel of the present embodiment is filled with fluid and has a donut shape. In this case, since the central part of the pressure vessel having a donut shape is hollow, various devices can be arranged here. In addition, a plurality of pressure vessels having a donut shape can be stacked and used in communication with each other. Note that the fluid filled in the pressure vessel includes helium, hydrogen, oxygen, and the like that can be used as a working fluid or fuel.

  In this embodiment, as shown in FIG. 1, the pressure vessel 10 includes a metal liner 11 having a hollow donut shape and a spiral shape in the circumferential direction B and the one side L in the axial direction A of the liner. First reinforcing layer 12 that is hardened with resin to cover the outer side of the liner 11, and a reinforcing fiber that is spirally continuous in the circumferential direction B of the liner 11 and toward the other side R in the axial direction A Is hardened with a resin and is composed of a second reinforcing layer 13 covering the outside of the liner 11 (first reinforcing layer 12).

  In addition, the axial direction A mentioned above is a direction along the circumference since the pressure vessel 10 has a hollow portion in the center and the main body has a donut shape (ring shape) continuous in the circumferential direction. . Further, the circumferential direction B is a direction along the outer circumferential direction in this circular cross section because the cross section orthogonal to (crossing) the axial direction A of the pressure vessel 10 forms a substantially circular cross section (meridian plane).

  The liner 11 is made of a metal material such as titanium or aluminum, and two holes 21 and 22 are formed in the upper portion. The holes 21 and 22 are used as a supply port for supplying fluid to the inside or a discharge port for discharging the fluid inside. The number of the holes 21 and 22 may be one or three or more.

  The first reinforcing layer 12 is formed by winding a first prepreg as a reinforcing fiber in a spiral shape around the outer peripheral surface of the liner 11 in the circumferential direction B and toward one side L in the axial direction A, and curing this. The outer side of the liner 11 is covered and reinforced.

  The second reinforcing layer 13 has a second prepreg as a reinforcing fiber formed in a spiral shape in the circumferential direction B on the outer peripheral surface of the liner 11, here the outer side of the first prepreg and toward the other side R in the axial direction A. The outer side of the liner 11 is covered and reinforced by winding and curing.

  Here, the prepreg is formed by impregnating a resin (epoxy resin, etc.) into a strip-like or strip-like carbon fiber strip with carbon fibers (or glass fibers) aligned in the same direction and semi-curing it. is there.

  Here, the manufacturing method of the pressure vessel of a present Example is demonstrated using the flowchart of FIG. 2, and the schematic of FIG.

  As shown in FIG. 2, the pressure vessel manufacturing method of the present embodiment includes a step (S 11) of manufacturing a metal liner 11 having a hollow donut shape, and a circumferential surface B of the liner 11 on the surface of the liner 11. And the process (S12-S13) of winding the 1st prepreg impregnated with resin toward the one side L in the axial direction A in a spiral shape, the circumferential direction B of the liner 11 on the surface of the first prepreg, and in the axial direction A The step of winding the second prepreg impregnated with the resin toward the other side R in a spiral manner (S14), and curing the liner 11 around which the first prepreg and the second prepreg are wound, thereby hardening the first reinforcing layer 12 and the first prepreg. 2 and the step of forming the reinforcing layer 13 (S15 to S16).

  That is, first, in step (S11), a liner 11 having a hollow donut shape is manufactured using titanium or another material, and two holes 21 and 22 are formed in the upper part. Next, as shown in FIG. 3, in the step (S12), the strip-shaped first and second prepregs 31 and 32 are cut (cut) into a predetermined width. In the step (S13), the first prepreg 31 having a predetermined width is spirally (helical) formed on the outer peripheral surface of the liner 11 in the circumferential direction B and toward the one side L in the axial direction A. Wrap along. That is, the first prepreg 31 is wound around the outer peripheral surface of the liner 11 in a spiral manner counterclockwise (one side L).

  Further, in the step (S14), the second prepreg 32 having a predetermined width is formed on the outer peripheral surface of the liner 11 in the circumferential direction B and toward the other side R in the axial direction A in a spiral shape (helical shape). Wrap along. That is, the second prepreg 32 is wound around the outer peripheral surface of the liner 11 in a spiral manner clockwise (the other side R).

  That is, the partial winding process in which the first prepreg 31 is inclined at a predetermined angle in the axial direction A with respect to the circumferential direction B of the liner 11 and spirally wound with a predetermined width is performed by the series of first prepregs 31 in the axial direction of the liner 11. The first winding step of winding the first reinforcing fiber layer around the entire surface of the liner 11 by repeating the step B continuously at a predetermined interval and the inclination direction of the first winding step of the second prepreg 32 The partial winding process of inclining in the opposite direction and winding in a spiral shape with a predetermined width is continuously repeated at a predetermined interval in the axial direction B of the liner 11 with a series of reinforcing fibers, thereby making the entire surface of the liner 11 uniform. It is comprised by the 2nd winding process which winds a 2nd reinforcing fiber layer around.

  Specifically, in FIG. 3, in the first winding step, the first prepreg 31 is temporarily fixed to the surface of the liner 11 with a tape (not shown), and the first prepreg 31 is moved in the circumferential direction B of the liner 11. Is spirally wound in a state inclined at a predetermined angle in the axial direction A. At this time, when the first prepreg 31 is spirally wound around the surface of the liner 11, the first prepreg 31 b in the second turn is a predetermined interval in the axial direction B of the liner 11 with respect to the first prepreg 31 a in the first turn. It will be a distant position. Subsequently, the first prepreg 31c in the third turn is located at a predetermined distance in the axial direction B of the liner 11 with respect to the first prepreg 31b in the second turn, and then the first prepreg 31c in the third turn. On the other hand, the first prepreg 31d in the fourth turn is positioned at a predetermined interval in the axial direction B of the liner 11. The first prepreg 31e in the fifth turn is separated from the first prepreg 31d in the fourth turn by a predetermined distance in the axial direction B of the liner 11 and is in close contact with the first prepreg 31a in the first turn without any gap. It becomes the position. That is, the surface of the liner 11 is divided into four regions in the axial direction A, and the first prepreg 31 is continuously wound around each region.

  In this manner, the partial winding process of winding in a predetermined width spiral is continuously repeated at a predetermined interval in the axial direction B of the liner 11 by the series of first prepregs 31, so that the first winding is performed on the entire surface of the liner 11. The reinforcing fiber layer can be wound.

  On the other hand, in the second winding step, the second prepreg 32 is temporarily fixed to the surface of the first reinforcing fiber layer formed outside the liner 11 with a tape (not shown), and the second prepreg 32 is wound around the liner 11. It is wound in a spiral shape in a state where it is inclined at a predetermined angle in the axial direction A with respect to the direction B. In this case, the inclination direction in which the second prepreg 32 is wound is a reverse direction that is symmetrical to the inclination direction in which the first prepreg 31 is wound. At this time, when the second prepreg 32 is spirally wound around the surface of the first reinforcing fiber layer, the second prepreg 32b in the second turn is in the axial direction B of the liner 11 with respect to the second prepreg 32a in the first turn. The positions are separated by a predetermined interval. Subsequently, the second prepreg 32c in the third turn is located at a predetermined distance in the axial direction B of the liner 11 with respect to the second prepreg 32b in the second turn, and then the second prepreg 32c in the third turn. On the other hand, the second prepreg 32d in the fourth turn is located at a predetermined distance in the axial direction B of the liner 11. The second prepreg 32e in the fifth turn is separated from the second prepreg 32d in the fourth turn by a predetermined distance in the axial direction B of the liner 11, and is in close contact with the second prepreg 32a in the first turn without any gap. It becomes the position. That is, the surface of the liner 11 is divided into four regions in the axial direction A, and the second prepreg 32 is continuously wound around each region.

  In this way, the partial winding step of winding in a spiral shape with a predetermined width is continuously repeated at a predetermined interval in the axial direction B of the liner 11 by a series of second prepregs 32, thereby forming the first reinforcing fiber layer in the liner 11. The second reinforcing fiber layer can be wound around the entire surface.

  In this case, in the first winding process, the spiral winding of the predetermined width of the first prepreg 31 in the partial winding process with respect to the liner 11 is inclined, so that the tension of the first prepreg 31 can be maintained. The first prepreg 31 has a predetermined width within a range in which the first prepreg 31 is not loosened, and can be tightly wound so that the fibers are in contact with each other in a spiral shape. Therefore, the first prepreg 31 is wound around the hollow donut-shaped liner 11 without loosening by repeating the partial winding process continuously with a series of first prepregs 31 spaced in the axial direction B of the liner 11. be able to. In this case, the interval in the axial direction B in the partial winding step is an interval position where the first prepreg 31 can be wound while maintaining the winding tension of the first prepreg 31. Will be stretched in contact with. Further, the winding of the predetermined width of the first prepreg 31 in the partial winding process is a dense winding, and the winding between the partial winding processes is a sparse winding compared to the dense winding, and the partial winding process The first reinforcing fiber layer can be wound around the entire surface of the liner 11 without a gap by repeating a number of times continuously with a series of first prepregs 31 at intervals in the circumferential direction of the liner.

  On the other hand, in the second winding step, the spiral winding of the predetermined width of the second prepreg 32 in the partial winding step with respect to the liner 11 on which the first reinforcing fiber layer is formed is inclined opposite to the first winding step. Therefore, the tension of the second prepreg 32 can be maintained, and the second prepreg 32 has a predetermined width within a range where the second prepreg 32 is not loosened, and can be tightly wound so that the fibers are in contact with each other in a spiral shape. For this reason, the second prepreg 32 is wound around the hollow donut-shaped liner 11 without loosening by repeating the partial winding process continuously with a series of second prepregs 32 at intervals in the axial direction B of the liner 11. be able to. In this case, the interval in the axial direction B in the partial winding step is an interval position where the second prepreg 32 can be wound while the winding tension of the second prepreg 32 is maintained. Will be stretched in contact with. Further, the winding of the predetermined width of the second prepreg 32 in the partial winding process is a dense winding, and the winding between the partial winding processes is a sparse winding compared to the dense winding, and the partial winding process Is repeated a number of times continuously with a series of second prepregs 32 at intervals in the circumferential direction of the liner, whereby the second reinforcing fiber layer is formed in a gap around the entire surface of the first reinforcing fiber layer formed on the liner 11. It can be wound without any problems.

  Thereafter, in the step (S15), the resin is cured by the liner 11 around which the first prepreg 31 and the second prepreg 32 are wound, so that the first reinforcing layer 12 and the second layer covering the outside of the liner 11 are cured. The reinforcing layer 13 is formed. Then, the pressure vessel 10 is manufactured by performing a finishing process in a process (S16).

  As described above, in the pressure vessel according to the present embodiment, the metal liner 11 having a hollow donut shape is continuous with the spiral in the circumferential direction B and the one side L in the axial direction A of the liner 11. The first reinforcing layer 12 in which the reinforcing fiber is cured by the resin and covers the outer side of the liner 11, and the reinforcing fiber that spirally continues toward the other side R in the circumferential direction B and the axial direction A of the liner 11 is made of the resin. A second reinforcing layer 13 that is cured and covers the outside of the liner 11 (first reinforcing layer 12) is provided.

  Therefore, the first prepreg 31 is spirally wound around the outer peripheral surface of the liner 11 toward the one side L, and the second prepreg 32 is wound spirally toward the other side R on the first prepreg 31. Since the 1st reinforcement layer 12 and the 2nd reinforcement layer 13 are laminated | stacked and formed, the two reinforcement layers 12 and 13 which a reinforcement fiber cross | intersect can be formed easily.

  When forming at least two reinforcing layers 12 and 13 in which carbon fibers intersect on the surface of the liner 11, the belt-like carbon fibers are wound along the circumferential direction B of the liner 11, but are along the axial direction A of the liner 11. It is difficult to wrap. That is, the carbon fiber can be wound around the outer periphery of the liner 11 along the axial direction A with a predetermined tension, but the carbon fiber along the axial direction A with a predetermined tension can be wound around the inner periphery of the liner 11. Cannot be wrapped. In this embodiment, the prepregs 31 and 32 are spirally wound in two different directions, whereby at least two reinforcing layers 12 and 13 in which carbon fibers intersect can be formed on the surface of the liner 11.

  Further, in the pressure vessel of this embodiment, the reinforcing fibers constituting the first reinforcing layer 12 and the second reinforcing layer 13 are constituted by the first prepreg 31 and the second prepreg 32. Therefore, by using the prepregs 31 and 32, the reinforcing fiber can be easily wound around the outer peripheral surface of the liner 11 in a spiral shape.

  In the method for manufacturing a pressure vessel according to the present embodiment, a step (S11) of manufacturing a metal liner 11 having a hollow donut shape, and the first prepreg 31 toward the one side L on the surface of the liner 11 are performed. , A step of winding the second prepreg 32 around the surface of the first prepreg 31 toward the other side R (S14), a first prepreg 31 and a second prepreg 32. Is formed from a step (S15 to S16) in which the first reinforcing layer 12 and the second reinforcing layer 13 are formed by curing the liner 11 on which is wound.

  Therefore, the first prepreg 31 is spirally wound around the outer peripheral surface of the liner 11 toward the one side L, and the second prepreg 32 is wound spirally toward the other side R on the first prepreg 31. Since the 1st reinforcement layer 12 and the 2nd reinforcement layer 13 are laminated | stacked and formed, the two reinforcement layers 12 and 13 which a reinforcement fiber cross | intersect can be formed easily, and simplification of a manufacturing process is attained. can do.

  In the above-described embodiment, the two reinforcing layers 12 and 13 are formed on the outer side of the liner 11. However, the number of the reinforcing layers 12 and 13 is not limited to this number, and the two reinforcing layers arranged in the direction in which the reinforcing fibers intersect with each other. What is necessary is just three layers or more. Further, in the above-described embodiment, the surface of the liner 11 is divided into four regions in the axial direction A, and the prepregs 31 and 32 are continuously wound around each region. The number is not limited to one, and may be set as appropriate according to the winding angle of each prepreg 31, 32. Furthermore, the winding angle of the first prepreg 31 and the second prepreg 32 around the liner 11 is preferably a symmetric angle.

  The pressure vessel and the manufacturing method thereof according to the present invention can be easily provided with a plurality of reinforcing layers arranged in the direction in which the reinforcing fibers intersect on the outside of the liner, and can be applied to any pressure vessel. Can do.

DESCRIPTION OF SYMBOLS 10 Pressure vessel 11 Liner 12 1st reinforcement layer 13 2nd reinforcement layer 31 1st prepreg (reinforced fiber)
32 Second prepreg (reinforced fiber)

Claims (4)

A metal liner in the shape of a hollow donut,
A first reinforcing layer in which a reinforcing fiber that is spirally continuous toward one side in the circumferential direction and the axial direction of the liner is cured by a resin and covers the outer side of the liner;
A second reinforcing layer in which a reinforcing fiber that is spirally continuous toward the other side in the circumferential direction and the axial direction of the liner is cured by a resin and covers the outside of the liner;
A pressure vessel comprising:   The pressure vessel according to claim 1, wherein the reinforcing fibers constituting the first reinforcing layer and the second reinforcing layer are constituted by a prepreg. Winding the first reinforcing fiber impregnated with the resin spirally around the surface of the metal liner having a hollow donut shape in the circumferential direction of the liner and toward one side in the axial direction;
Winding the second reinforcing fiber impregnated with resin spirally around the surface of the first reinforcing fiber in the circumferential direction of the liner and toward the other side in the axial direction;
Forming the first reinforcing layer and the second reinforcing layer by curing the liner around which the first reinforcing fiber and the second reinforcing fiber are wound;
A method for producing a pressure vessel, comprising: A method for producing a pressure vessel that cures after winding a reinforcing fiber impregnated with a resin around the entire surface of a metal liner having a hollow donut shape,
The partial winding process in which the reinforcing fibers are inclined in the axial direction with respect to the circumferential direction of the liner and wound in a spiral shape with a predetermined width is continuously repeated with a series of reinforcing fibers at predetermined intervals in the axial direction of the liner. A first winding step of winding the first reinforcing fiber layer around the entire surface of the liner;
A part winding process in which the reinforcing fiber is inclined in a direction opposite to the inclination direction of the first winding process and wound in a spiral shape with a predetermined width is continuously performed at a predetermined interval in the axial direction of the liner by a series of reinforcing fibers. The second winding step of winding the second reinforcing fiber layer around the entire circumference of the surface of the liner,
A method for producing a pressure vessel, comprising:

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