JPH11159619A - Internal pressure vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal pressure vessel difficult to generate layer separation and layer shear fracture, even when an internal pressure is increased, with high reliability. SOLUTION: In a fiber reinforcing resin-made internal pressure vessel closing at least one end of a cylinder unit 1 by a seal cover 5, in an internal peripheral surface of the cylinder unit 1 in a part providing the seal cover 5, in a shape conformed to its prescribed location, a hollow groove 3 fitting this location is provided. In an external shape of a fitting part of the seal cover 5 fitted to the hollow groove 3, a tapered surface is formed in an outer surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal pressure vessel.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional internal pressure container is provided with a fiber-reinforced resin or a resin-made resin in a concave groove 13 provided at each end of a cylindrical body 11 made of a fiber-reinforced resin. Metal end plate 15a and retainer ring 15
b (an annular number divided into an appropriate number). Reference numeral 17 denotes an O-ring for improving the sealing property between the cylindrical body 11 and the sealing lid 15, and reference numeral 16 denotes an end plate 15a and a retainer ring.
It is a bolt that connects to 15b.

In this internal pressure vessel, a glass fiber 12 impregnated with a thermosetting resin is continuously wound around a mandrel, and then the thermosetting resin is heated and cured by a filament winding method (FW method). Molded,
Thereafter, as shown in FIG. 7, a concave groove 13 is formed in the cylindrical body 11 by cutting, and subsequently, an end plate 15a is inserted into the cylindrical body 11, and subsequently, a retainer ring 15b is attached to the end plate 15a. It is manufactured by a method in which it is attached while being fitted into the concave groove 13.

As a result of various studies, the applicant has confirmed that the above-mentioned internal pressure container has the following disadvantages.

When the concave groove 13 of the cylindrical body 11 is formed by cutting as described above, the glass fiber 12 forming the cylindrical body 11 is cut. Since the strength is reduced by cutting the glass fiber 12 and the thin cylinder is a cylinder simply laminated by resin adhesive force, the internal pressure of the sealing lid 15 of the internal pressure container (shown by an arrow in FIG. 6)
When the axial force acts on the # portion in FIG. 6, delamination or interlaminar shear breakage easily occurs in the # portion in FIG. 6, and thus the # portion comes off.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a highly reliable internal pressure vessel which is less likely to cause delamination or interlayer destruction even when the internal pressure is increased.

[0007]

The gist of the present invention will be described with reference to the accompanying drawings.

An inner pressure vessel made of a fiber-reinforced resin in which at least one end of a cylindrical body is closed by a sealing lid 5, wherein the sealing lid 5 is provided on the inner peripheral surface of the cylindrical body 1 where the sealing lid 5 is provided. A concave groove 3 into which the part is fitted is provided, and the outer shape of the fitting portion of the sealing lid 5 fitted into the concave groove 3 is formed with a tapered surface on the outer surface. The present invention relates to an internal pressure vessel characterized by having a bent shape.

Further, in the internal pressure container according to claim 1,
The sealing lid 5 is composed of a closing portion 5a and a ring portion 5b.
The inner pressure container according to claim 1, wherein the ring portion 5b is fitted into the concave groove 3 formed on the inner peripheral surface of the inner pressure container.

[0010] At least one end of the cylindrical body is sealed with a lid 5.
In the internal pressure container made of fiber reinforced resin closed by the above, a portion provided with the hermetic lid 5 on the inner peripheral surface of the cylindrical body 1 has a shape matching a predetermined portion of the hermetic lid 5, An insert ring 4 provided with a concave groove 3 to be fitted is provided, and an outer shape of a fitting portion of the sealing lid 5 fitted into the concave groove 3 is a shape having a tapered surface formed on an outer surface. Pertains to an internal pressure vessel.

Further, in the internal pressure container according to claim 3,
An insert ring 4 having a substantially trapezoidal vertical cross section is used as the insert ring 4, and a continuous fiber 2 is used as the cylindrical body 1.
The inner pressure container according to the present invention employs a cylindrical body 1 having a structure in which is wound and laminated.

Further, in the internal pressure container according to claim 4,
The present invention relates to an internal pressure vessel characterized in that an insert ring 4 is arranged in the middle of a fiber 2 to be wound and laminated.

Further, in the internal pressure vessel according to any one of claims 3 to 5, a fiber reinforced resin sealing layer 2a is provided on the inner peripheral surface of the fiber reinforced resin cylinder 1 to which the insert ring 4 is fixed. The present invention relates to an internal pressure container characterized by the above.

[0014]

The operation and effect of the first and second aspects of the invention will be described.

Due to the fitting portion of the sealing lid 5 and the tapered surface of the concave groove 3, even if the internal pressure of the internal pressure container becomes high, this internal pressure X
Is a component of a and b, and b is a component of c and d.
A compressive force acts in the lamination direction of the fiber reinforced resin of the inner pressure container,
Breakage due to delamination of fiber 2 (breakage due to tensile force in the laminating direction of fiber 2) and breakage of fiber 2 due to interlaminar shear (fiber 2
(Destruction due to lateral displacement along the lamination surface of the fiber 2) is suppressed, and as the pressure in the container increases, the compressive force increases proportionally in the lamination direction, so that delamination of the fiber 2 and interlaminar shear fracture are reliably prevented. can do.

The operation and effect of the third aspect of the invention will be described.

In addition to the functions and effects of the first and second aspects, the groove 3 is provided with an insert ring 4 so as to minimize the cutting of the fiber 2.
Therefore, the strength can be improved accordingly.

The operation and effect of the present invention will be described.

The continuous fiber 2 is not parallel to the axis of the cylindrical body 1 as shown in FIG. 7 in the longitudinal section in the wound and laminated state by the insert ring 4 having a substantially trapezoidal longitudinal section, as shown in FIG. Since it is oriented in an oblique state, even if an axial force due to the internal pressure of the cylindrical body 1 acts, the internal pressure can be received by the fiber tensile force. Peeling and interlaminar shear failure can be avoided.

The operation and effect of the invention according to claim 6 will be described.

The fiber reinforced resin sealing layer 2a serves as a sealing layer on the inner peripheral surface of the fiber reinforced resin cylindrical body 1 to which the insert ring 4 is fixed, so that the airtightness is high, and the insertion ring is formed by the fiber reinforced resin sealing layer 2a. 4 can be stably fixed, and therefore, a highly reliable internal pressure container can be obtained in which the delamination of the fibers 2 and the interlaminar shear fracture do not easily occur even when the internal pressure increases.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the internal pressure vessel
In order to close the end of the cylindrical body 1 forming the internal pressure container, for example, a sealing lid 5 composed of an end plate 5a as a closing portion 5a and a retainer ring 5b as a ring portion 5b is provided.

The retainer ring 5b is composed of three arc-shaped plates as shown in FIG.
The retaining ring 8 is brought into contact with the inner peripheral surface of the retainer ring 5b to prevent the retaining ring 8 from coming out of the concave groove 3, and the retaining ring 8 is fixed to the end plate 5a with bolts 9.

An insert ring 4 having a substantially trapezoidal longitudinal section is provided at an end of the cylindrical body 1, and a concave groove 3 into which a retainer ring 5 b is fitted is provided on an inner peripheral surface of the insert ring 4. In addition, this insert ring 4 is divided into two parts,
The split ring may be used, and the insert ring 4 is formed of the fiber 2 simultaneously with the formation of the cylindrical body 1 when the cylindrical body 1 is formed without using the insert ring 4 formed in advance. You can also.

The method of manufacturing the internal pressure vessel according to the present embodiment includes the following steps.
Is formed by a filament winding method (FW method).

First, in order to form a fiber-reinforced resin sealing layer 2a to be a sealing layer impregnated with an epoxy resin, a mandrel is continuously wound with a required amount of a special sealing substrate or glass fiber 2 impregnated with a resin. The insert ring 4 is fitted at an appropriate position, or the insert ring 4 is formed of glass fiber 2, and then the fiber reinforced resin seal layer 2a is formed.
And, a required amount of the glass fiber 2 impregnated with the epoxy resin is continuously wound on the insert ring 4, subsequently, the epoxy resin is heated and cured, and then the mandrel is released to form the cylindrical body 1. .

Subsequently, the groove 3 is formed by cutting on the inner peripheral surface of the cylindrical body 1 at the position where the insert ring 4 is mounted so as to form the groove 3 for mounting the retainer ring 5b of the sealing lid 5. An inclined surface having a predetermined angle is formed in the concave groove 3 so that the end portion of the cylindrical body 1 becomes wider toward the inner peripheral surface, and the retainer ring of the sealing lid 5 fitted into the concave groove 3 is formed. The outer shape of 5b is formed on the tapered tapered surface so as to contact the shape of the concave groove 3. Then, the inner pressure container is manufactured by fitting the retainer ring 5 b of the sealing lid 5 into the concave groove 3 and closing the cylindrical body 1.

A specific method of fitting the retainer ring 5b of the sealing lid 5 into the concave groove 3 is as follows. First, an end plate 5a having an O-ring 7 mounted on the outer periphery for sealing is inserted into the cylindrical body 1, The retainer ring 5 b divided into three as shown in FIG. 2 is inserted into the cylinder 1, the retainer ring 5 b is fitted in the concave groove 3 provided in the insert ring 4, and the retainer ring 5 b comes out of the concave groove 3. In order to prevent this, the holding ring 8 is brought into contact with the inner peripheral surface of the retainer ring 5b, and the holding ring 8 is fixed to the end plate 5a with bolts 9.

[0030] Therefore, the formed pressure vessel as described above, even when the internal pressure of the pressure vessel is high, the internal pressure (shown by arrows in FIG. 1) is the inclined surface of the groove 3 (in FIG. 1 ♭ ₁ part) Further, as shown in FIG. 5, the internal pressure X presses the retainer ring 5b of the sealing lid 5 so as to abut the concave groove 3 formed by the inclined surface. The pressing force X in the direction (a) is divided into a slanting surface direction a and a pressing force in a direction b perpendicular to the slanting surface. Direction) from the lower side to the upper side, and a pressing force d in the direction of the lamination surface of the fibers 2 (horizontal direction), and further in the direction of the lamination surface of the fibers 2 (horizontal direction). Is a pressing force e in the direction perpendicular to the inclined surface and a pressing force f in the direction of the inclined surface.
As a result, the pressing force X applied in the laminating surface direction (horizontal direction) of the fibers 2 becomes the pressing force c for vertically pressing the laminating surface direction (horizontal direction) of the fibers 2 upward from below. And the pressing force e in the direction perpendicular to the inclined surface and the pressing force a, f in the direction of the inclined surface, and vertically presses the lamination surface direction (horizontal direction) of the fibers 2 from below to above. The pressing force c acts to prevent delamination or interlaminar shear breakage of the fiber 2, and the pressing force e in the direction perpendicular to the inclined surface is the fiber 2 at the portion where the laminating surface direction of the fiber 2 is inclined. Acts to prevent interlayer delamination and interlayer shear fracture.

Accordingly, an inclined surface is formed in the concave groove 3 in which the retainer ring 5b of the sealing lid 5 is fitted, and the outer shape of the retainer ring 5b of the sealing lid 5 fitted in this concave groove 3 is changed to the shape of the concave groove 3. Because it was formed on the tapered surface so that it abuts against
Even if the internal pressure vessel becomes high pressure and this internal pressure presses the sealing lid 5, the internal pressure acting on the sealing lid 5 presses the inclined surface of the concave groove 3 to prevent delamination of the fiber 2 and interlaminar shear breakage. Therefore, even if the internal pressure in the internal pressure container is increased, it is possible to obtain a highly reliable internal pressure container in which the delamination of the fibers 2 and the interlaminar shear breakage are difficult.

In order to prevent the pressing forces a and f in the direction of the inclined surface, the pressing ring 8 which is in contact with the inner peripheral surface of the retainer ring 5b works effectively.

Further, an inclined surface having a predetermined angle is formed in the concave groove 3 in which the retainer ring 5b of the sealing lid 5 is fitted so that the end of the cylindrical body 1 becomes wider toward the inner peripheral surface,
Since the outer shape of the retainer ring 5b of the sealing lid 5 fitted into the concave groove 3 is formed into a tapered tapered surface so as to abut the shape of the concave groove 3, the retainer ring 5b of the sealing lid 5 is extremely inserted into the concave groove 3. Can be easily inserted into the device.

Further, in the manufacture of the cylindrical body 1, since only the insert ring 4 is fitted on the mandrel, the manufacturing efficiency is improved, and further, by fitting several insert rings 4 at appropriate positions, the cylindrical shape is obtained. Since the desired number of the bodies 1 can be obtained, the mass production is excellent in this respect. Further, since the fiber reinforced resin sealing layer 2a as the sealing layer is formed by the FW method, a clean sealing layer without wrinkles can be easily obtained. Will be done.

Fiber-reinforced resin seal layer 2 as seal layer
In some cases, it is not necessary to provide a, and this internal pressure container is also manufactured by the same method as described above. Even if the internal pressure of the internal pressure container becomes high, the internal pressure container becomes highly reliable in which delamination or interlayer destruction is difficult.

In some cases, it is not necessary to use the insert ring 4 in order to prevent delamination or shear destruction of the inner pressure vessel. In this case, the inner pressure vessel is not shown in FIGS.
The groove 3 provided with the same inclined surface as described above is provided directly on the inner peripheral surface of the cylindrical body 1 without using the insert ring 4 shown in FIGS. .

Also in this case, even if the inside of the internal pressure container becomes high pressure and this internal pressure presses the sealing lid 5, the internal pressure acting on the sealing lid 5 is reduced by the groove provided directly on the inner peripheral surface of the cylindrical body 1. 3 acts to prevent delamination and interlaminar shearing of the fiber 2, so that even if the internal pressure in the internal pressure container increases, delamination of the fiber 2 and interlaminar shearing are less likely to occur. It is possible to provide a highly pressurized internal pressure container.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a main part of an internal pressure container according to one embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing a method for manufacturing an internal pressure container according to one embodiment of the present invention.

FIG. 3 is an explanatory sectional view showing a main part of an internal pressure container according to another embodiment of the present invention.

FIG. 4 is an explanatory sectional view showing a method for manufacturing an internal pressure vessel according to another embodiment of the present invention.

FIG. 5 is a conceptual explanatory diagram of the present invention.

FIG. 6 is an explanatory sectional view showing a main part of a conventional internal pressure vessel.

FIG. 7 is an explanatory sectional view showing a conventional method for manufacturing an internal pressure container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylindrical body 2 Fiber 2a Fiber reinforced resin sealing layer 3 Concave groove 4 Insert ring 5 Sealing lid 5a Closed part 5b Ring part

Claims (6)

[Claims] 1. An internal pressure container made of fiber reinforced resin, wherein at least one end of a cylindrical body is closed with a sealing lid, and a portion where the sealing lid is provided on the inner peripheral surface of the cylinder is provided with the sealing lid. A concave groove into which the part is fitted is provided in a shape that matches the predetermined part, and the outer shape of the fitting part of the sealing lid that fits into the concave groove is a shape having a tapered surface formed on the outer surface. An internal pressure container characterized by the above-mentioned. 2. The internal pressure container according to claim 1, wherein the sealing lid is constituted by a closing portion and a ring portion, and the ring portion is fitted into a concave groove formed on an inner peripheral surface of the cylindrical body. Features an internal pressure vessel. 3. An internal pressure vessel made of fiber reinforced resin, wherein at least one end of a cylindrical body is closed with a sealing lid, and a portion where the sealing lid is provided on the inner peripheral surface of the cylinder is provided with the sealing lid. An insert ring provided with a concave groove in which the part is fitted is provided in a shape that matches the predetermined part, and the outer shape of the fitting part of the sealing lid that fits in the concave groove has a tapered surface formed on an outer surface. Internal pressure container characterized by having a bent shape. 4. The internal pressure container according to claim 3, wherein an insert ring having a substantially trapezoidal vertical cross section is used as the insert ring, and a cylindrical body having a structure in which continuous fibers are wound and laminated is used as the cylindrical body. An internal pressure vessel characterized by the above. 5. The internal pressure container according to claim 4, wherein the insert ring is disposed in the middle of the fibers to be wound and laminated. 6. The internal pressure vessel according to claim 3, wherein a fiber reinforced resin seal layer is provided on an inner peripheral surface of the fiber reinforced resin cylinder to which the insert ring is fixed. And internal pressure vessel.