JP2017096371A - Pressure container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure container capable of enhancing strength of an end part of a pressure container in which pressure acts on a direction along an axial center of the pressure container.SOLUTION: A pressure container 1 is configured such that on a peripheral surface of a core material 2 including a cylindrical liner 3 formed with an internal space S and a mouthpiece 4 integrated with the liner 3 on at least one end part of the liner 3, a sheet-like fiber-reinforced resin layer 5 is formed so as to circle a plurality of times over both ends of the core material 2. On a cross section vertical to an axial center CL of the pressure container 1, the shape of the core material 2 changes so that a cross sectional area of the core material 2 containing the mouthpiece 4 gradually decreases toward an end part 11 of the pressure container 1 on which the mouthpiece 4 is arranged.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a pressure vessel suitable for storing high-pressure gas or the like.

  For example, a pressure vessel for storing fuel gas is used in a natural gas vehicle or a fuel cell vehicle. In order to reduce the weight and increase the strength, this type of pressure vessel is used as a core material with a base attached to the liner corresponding to the shape of the pressure vessel with an adhesive or the like, and a fiber reinforced resin layer is provided on the core material. It is covered.

  As such a pressure vessel, for example, Patent Document 1 proposes a method of manufacturing a pressure vessel by a filament winding method. Here, a narrow fiber reinforced resin obtained by impregnating a filamentous reinforcing fiber with a thermosetting resin is used as a fiber reinforced resin material covering the core material. In this method, the narrow fiber reinforced resin is wound around the liner that forms at least a part of the body portion of the pressure vessel so as to overlap.

JP 2010-125826 A

  However, according to the filament winding method shown in Patent Document 1, a narrow fiber-reinforced resin is wound around a core material so as to overlap, so that the winding time becomes a long time.

  Therefore, when one fiber-reinforced resin sheet is wound around the core material a plurality of times, the fiber-reinforced resin layer can be formed in a short time. However, it is difficult for the pressure vessel manufactured by such a method to reinforce the end of the pressure vessel in which pressure acts in a direction along the axis. Therefore, in order to reinforce the end portion of the pressure vessel, it is necessary to separately reinforce by the filament winding method after winding the fiber reinforced resin sheet around the core material, which takes time.

  The present invention has been made in view of these points, and the object of the present invention is to provide a peripheral surface of the core material so that the sheet-like fiber reinforced resin circulates around the axis of the core material a plurality of times. An object of the present invention is to provide a pressure vessel capable of increasing the strength of the end portion of the pressure vessel in which pressure acts in a direction along the axis of the pressure vessel even if a fiber reinforced resin layer is formed on the pressure vessel.

  In view of the above problems, a pressure vessel according to the present invention includes a cylindrical liner having an internal space, and a base integrated with the liner at at least one end of the liner. A pressure vessel in which a sheet-like fiber reinforced resin layer is formed so as to circulate a plurality of times over both sides of the core material, in a cross section perpendicular to the axis of the pressure vessel, The shape of the core material is changed so that the cross-sectional area of the core material including the base continuously decreases as the cross-sectional area proceeds to the end of the pressure vessel where the base is disposed.

  According to the present invention, since the sheet-like fiber reinforced resin layer is formed in the pressure vessel so as to circulate the core material a plurality of times, such a pressure vessel is easily manufactured in a short time. Furthermore, since the shape of the core material is changed so that the cross-sectional area of the core material in the part where the fiber reinforced resin layer is formed proceeds continuously to the end where the base is arranged, the shaft material changes. Even if pressure acts in the direction along the heart, the base does not come out of the liner. Therefore, it is not necessary to further reinforce the peripheral portion of the end portion of the pressure vessel by the filament winding method.

It is a typical sectional view of a pressure vessel concerning an embodiment of the present invention. It is AA arrow sectional drawing along the axial center of the pressure vessel shown in FIG. (A) is BB arrow sectional drawing of the pressure vessel shown in FIG. 2, (b) is CC arrow sectional drawing of the pressure vessel shown in FIG. 2, (c) is a figure. It is DD sectional view taken on the line of the pressure vessel shown in FIG.

  Below, the pressure vessel (tank) 1 which concerns on embodiment of this invention is demonstrated, referring the following FIGS. 1-3.

  As shown in FIG. 1 and FIG. 2, in the pressure vessel 1 according to the present embodiment, a sheet-like fiber is formed on the peripheral surface of the core material 2 so as to circulate the core material 2 a plurality of times over both sides of the core material 2. A reinforced resin layer 5 is formed. The core material 2 includes a cylindrical liner 3 and a pair of caps 4 and 4 integrated with the liner 3.

  The liner 3 is formed with an internal space S that accommodates (fills) high-pressure hydrogen gas of, for example, about 70 MPa. The material of the liner 3 is not particularly limited as long as the fiber reinforced resin sheet can be wound around the peripheral surface thereof, such as metal or resin.

  The base 4 is a metal base made of aluminum or stainless steel. In the present embodiment, the base 4 is flattened in an elliptical shape and has a shape of a dent toward the end of the pressure vessel 1. The pair of caps 4 and 4 are fitted to the inner wall 32 of the liner 3 on both sides of the liner 3.

  Thus, when the pressure vessel 1 is used, the base 4 and the liner 3 are integrated, and high-pressure hydrogen gas can be supplied into the internal space S from the gas supply port 41 formed in one base 4.

  Such integration is achieved, for example, by preparing a cylindrical pipe corresponding to the liner 3, inserting the caps 4 on both sides of the cylindrical pipe, and then deforming both sides of the cylindrical pipe so that the end faces are flattened. Can do.

  Thereby, all the circumferences around the axial center CL of the liner 3 can be made the same length. Therefore, at the time of manufacturing the pressure vessel 1 which will be described later, the sheet-like fiber reinforced resin to be the fiber reinforced resin layer 5 is the same length as the liner 3 (core) in any cross section orthogonal to the axis CL of the liner 3. It can be easily wound around the material 2).

  The fiber reinforced resin layer 5 is a sheet-like layer continuously formed on the peripheral surface of the core material 2 so as to circulate the core material 2 a plurality of times over both sides of the liner 3. In the present embodiment, as described above, in any cross section orthogonal to the axis CL of the liner 3, the winding length of the sheet-like fiber reinforced resin layer 5 that circulates the liner 3 (circulated length) is The same. Therefore, the winding length of the fiber reinforced resin layer 5 shown to Fig.3 (a)-(c) is the same.

  The fiber reinforced resin layer 5 is a layer in which a reinforced fiber is impregnated with a matrix resin. The reinforcing fibers are continuous reinforcing fibers that are aligned along the circumferential direction of the core material 2, and the reinforcing fibers are oriented in a direction orthogonal to the axis CL of the pressure vessel 1.

  Furthermore, in the present embodiment, in a cross section perpendicular to the axis CL of the pressure vessel 1, the cross-sectional area of the core material 2 including the base 4 continuously decreases as it proceeds to the end portion 11 of the pressure vessel 1. The shape of the core material 2 has changed.

  Thereby, since the fiber reinforced resin layer 5 is also formed on the core material 2 including the base 4, the base 4 does not come out of the liner 3 even if pressure is applied in the direction along the axis CL. Therefore, it is not necessary to further reinforce the peripheral portion of the end portion of the pressure vessel 1 by the filament winding method. In addition, since it is not necessary to increase the thickness of the base 4 in consideration of pressure resistance, the pressure vessel 1 can be reduced in weight.

  Such a pressure vessel 1 can be manufactured as follows, for example. A cylindrical pipe corresponding to the liner 3 is prepared, and after the bases 4 are inserted on both sides of the cylindrical pipe, both sides of the cylindrical pipe are deformed so that the end surfaces are flattened. Thereby, the base 4 is integrated with the liner 3.

  Next, a fiber reinforced resin sheet in which a reinforcing resin is impregnated with a matrix resin is wound around the liner 3 a plurality of times over both ends of the core material 2 (specifically, the liner 3) with which the base 4 is integrated. In this embodiment, at the time of winding, by applying tension to the fiber reinforced resin sheet, the fiber reinforced resin sheet to be the fiber reinforced resin layer 5 has the same length in any cross section intersecting the axis CL of the liner 3. Therefore, the fiber reinforced resin sheet can be easily wound around the liner 3 (core material 2). Thereby, the fiber reinforced resin layer 5 equivalent to the center of the liner 3 is also formed in the portion of the liner 3 where the base 4 is disposed.

  Here, when the matrix resin is a thermoplastic resin, the fiber reinforced resin sheet is heated and wound around the liner 3 in a state where the thermoplastic resin is softened, and then the thermoplastic resin is solidified by cooling or the like. Let On the other hand, when the matrix resin is a thermosetting resin, after winding the fiber reinforced resin sheet impregnated with the uncured thermosetting resin, the thermosetting resin is cured by heating.

  Thus, the pressure vessel 1 can be manufactured in a short time by winding the fiber reinforced resin sheet around the liner 3 (that is, by the sheet winding method). Furthermore, in this embodiment, since the fiber reinforced resin sheet is wound around the core material 2 in which the base 4 is integrated with the liner 3, it is not necessary to attach the base with an adhesive or the like by post-processing. Therefore, since it is not necessary to increase the bonding allowance between the base 4 and the liner 3 in order to increase the pressure resistance, the pressure vessel 1 can be reduced in size.

  Although the embodiment of the present invention has been described in detail above, the specific configuration is not limited to this embodiment, and even if there is a design change within a scope not departing from the gist of the present invention, they are not limited to this embodiment. It is included in the invention.

  For example, in the present embodiment, in the manufacturing method, the base and the liner are integrated in advance. For example, after a fiber reinforced resin sheet is wound around a cylindrical pipe in advance to form a fiber reinforced resin layer, the base is inserted into this. Alternatively, the cylindrical pipe on which the fiber reinforced resin layer is formed may be deformed so as to crush both sides.

1: pressure vessel (tank), 2: core material, 3: liner, 4: base, CL: axial center, S: internal space.

Claims (1)

On the peripheral surface of a core material provided with a cylindrical liner in which an internal space is formed and a base integrated with the liner at at least one end of the liner, a plurality of the core material is provided on both sides of the core material. A pressure vessel in which a sheet-like fiber reinforced resin layer is formed so as to circulate,
In the cross section perpendicular to the axial center of the pressure vessel, the cross-sectional area of the core material including the base is continuously reduced as it advances toward the end of the pressure vessel where the base is disposed. A pressure vessel characterized by a change in shape.

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