JPH0698295B2 - Method for manufacturing shell for square pressure vessel - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for manufacturing a shell for a rectangular pressure vessel.

[Conventional technology and its problems]

Conventionally, a metal cylindrical container is generally used as a pressure container for storing chemical substances and the like. However,
A cylindrical container requires a lot of trouble to fix it so that it does not move when it is loaded on a vehicle, and a large amount of wasted space is required for packing in a warehouse or the like. If a metal container is used to make a rectangular container having the same volume as the cylindrical container, the weight becomes large.

Therefore, pressure of 10 kgf /
As a pressure vessel used at a pressure of ² cm ² or less, it is conceivable to use a core material forming a square tubular body with a surface coating layer made of fiber reinforced plastic to reduce the weight. When a fiber-reinforced plastic surface coating layer is wound on the core material forming the core material by the filament winding method, the roving cannot exert sufficient pressing force against the core material, resulting in void defects such as air bubbles and uneven thickness. Has deteriorated the quality.

Therefore, the present invention aims to provide a method for manufacturing a shell for a rectangular pressure vessel that has good storage efficiency in a warehouse, a vehicle, etc., and can be stacked, and that is lightweight and has excellent specific strength and specific rigidity. There is.

[Means for Solving the Problems]

The present invention has been made in view of such a conventional technical problem, and the configuration thereof is such that an aluminum honeycomb or an aramid honeycomb is used as a core material arranged to form a quadrangular tubular body, and the outside of the core material is used. A method for manufacturing a shell for a square pressure vessel having a surface coating layer made of fiber reinforced plastic on,
After pressing the central portion of each side of the core material arranged so as to form a quadrangular tubular body outward, and bulging so as to extend in the central axis direction to give a curvature to each core material, This is a method for manufacturing a shell for a rectangular pressure vessel in which a roving is wound around the core material by a filament winding method to form a surface coating layer. Then, the core material and the surface coating layer can be flattened by pressing the outer surface of the surface coating layer before curing with a flat plate.

[Action]

In this method of manufacturing a shell for a rectangular pressure vessel, the central portion of each side of the core material is pressed outward, and the core material is bulged so as to extend in the central axis direction to give a curvature to each core material. After that, roving is wound around the core material by a filament winding method to form a surface coating layer. Therefore, the tension of the roving can be pressed and effectively utilized as a force to tightly wind the roving on the core material. As a result, it is possible to form a surface coating layer having no voids such as bubbles between the roving winding surface and the rovings. The winding direction of the roving can be determined in consideration of the acting direction of the stress generated by the internal pressure during use as the rectangular pressure vessel.

A pressure vessel is generally constructed by attaching a bottom and a lid to the square pressure vessel shell manufactured in this manner.

If the pressure vessel contains 10 kgf / cm ² or less of chemical substances,
Due to the internal pressure, the shell forming the quadrangular cylinder tries to bulge and deform outward. However, the bulging deformation of shells is satisfactorily prevented by the core material forming the honeycomb body and the surface coating layer formed by the filament winding method. Also, by adjusting the roving direction of the surface coating layer in consideration of the action direction of the stress caused by the internal pressure of the contained substance, the swelling deformation of the shell can be well suppressed while the thickness of the surface coating layer is reduced. can do.

When the outer surface of the surface coating layer before curing is pressed by a flat plate to straighten the core material and the surface coating layer, a better rectangular cylinder is formed, and the stability especially when stacking is improved. .

〔Example〕

Embodiments according to the present invention will be described below with reference to the drawings.

1 to 11 show one embodiment of the present invention. Reference numeral 1 denotes a mandrel. As shown in FIGS. 1 and 2, iron rectangular plates 2 having cutouts 2a at four corners are arranged to face each other, and both rectangular plates 2 are welded and fixed to an outer peripheral edge of a strength member 2b. At the same time, it has a structure in which the shaft 3 is inserted through the central portion, welded and fixed, and integrally connected. In addition, a notch 2c is formed in the center of each side of each rectangular plate 2, and a sliding member 4 made of a high-rigidity square member is slidably arranged in each notch 2c, and the sliding member 4 is placed outside. An extrusion means 5 for extruding toward is attached. The pushing means 5 is composed of a bracket 5a which is positioned inside and fixed to each notch 2c of the rectangular plate 2 and a screw member 5b which is screwed into the bracket 5a. Notch 2c
The sliding member 4 can be pushed outward while being guided to. Further, four holes 2d are formed in each rectangular plate 2 at equal intervals, and insertion members 21b described later can be inserted into the holes 2d.

In this way, four plate members 6 made of light metal (for example, aluminum, aluminum alloy) are arranged so as to cover each rectangular plate 2, and the four plate members 6 connect the angle members 7 with the screws 8. Each butt corner is filled with an angle member 9 made of a light metal, which is slidable in the direction of the central axis of the shaft 3. Thus, the four plate members 6 and the angle members 7 and 9 form a flexible rectangular tubular body.

Next, a method for producing a shell for a rectangular pressure vessel using the mandrel 1 described above will be described.

First, the third plate is attached to the outer surfaces of the four plate members 6 and the angle member 9.
As shown in the figure, a releasing treatment is performed by applying a separating agent 10 or the like. A fiber-reinforced plastic strip is wound around the outer surface of the mandrel 1 as shown in FIG. 4 and cured to form the inner layer 11. The inner layer 11 can also be formed by the filament winding method.

Next, on the outer surface of the inner layer 11, four honeycomb core members 12 made of aluminum or aramid, which are core members, are bonded and fixed so that the through holes 12a are substantially perpendicular to the outer surface. In the bonding work of the honeycomb body 12, an adhesive is interposed between the honeycomb body 12 and the inner layer 11,
This is done using the fastener 13 as shown in FIG. Fastener 13
Is a metal plate 13 arranged on the outer surface of the facing honeycomb body 12.
a, restraining members 13b arranged at appropriate intervals on the outer surface of each metal plate 13a, bolt members 13c inserted into both ends of each restraining member 13b, and nut members 13d screwed to each bolt member 13c.
The nut member 13d is screwed in, and the pair of opposing honeycomb bodies 12 are firmly bonded to the inner layer 11 in a state of being crimped. The other pair of honeycomb bodies 12 are firmly adhered to the outer peripheral surface of the inner layer 11 after the pair of honeycomb bodies 12 are adhered to each other or by using the same fastener 13 in which the position of the pressing member 13b is displaced.

The space formed at the abutting corners of each honeycomb body 12 is filled with a filling member 14 made of urethane or aluminum by bonding, and a small gap formed between the filling member 14 and the honeycomb body 12 is filled with putty. Further, as shown in FIGS. 6 and 10, a thin intermediate plate 15 made of fiber reinforced plastic having glass cloth or carbon cloth as roving is laminated on the outer surface of each honeycomb body 12, and a resin which also serves as an adhesive is cured. .

Next, in such a mandrel 1, the pushing means 5 is acted to give each honeycomb body 12 a curvature as schematically shown in FIG. That is, the screw member 5b is screwed into the bracket 5a, and the sliding members 4 are extruded outward while being guided by the notches 2c. The four plate members 6, the inner layer 11, the honeycomb body 12 and the intermediate plate 15 are The central portion of each side is pressed outward and bulged so as to extend in the direction of the central axis, thereby giving a curvature.

In this state, the shaft 3 of the mandrel 1 is rotatably driven and attached to the filament winding molding apparatus. And
While rotating the mandrel 1, a roving 17a of carbon fiber, glass fiber or the like is wound around the honeycomb body 12 and the packing member 14 by the filament winding method to form the surface coating layer 17 shown in FIG. As shown in FIG. 9, the roving 17a is guided to the guide roll 18 and guided to the resin tank 1
It is dipped in, for example, a thermosetting molten resin in 9 and passed through a pair of rollers 20 and wound on the intermediate plate 15 with a predetermined tension to form a surface coating layer 17. By wrapping the roving 17a while applying an appropriate tension, the roving 17a tightly wraps in a state in which the pressing force is sufficiently applied, and there are no voids such as bubbles between the roving 17a and the intermediate plate 15 and between the rovings 17a. The surface coating layer 17 can be formed. When the surface coating layer 17 is formed in this manner, the direction of the fiber is determined in consideration of the acting direction of the stress generated by the internal pressure during the use as the rectangular pressure vessel.

After the surface coating layer 17 is hardened, the action of the extrusion means 5 is released, and the square pressure vessel shell including the inner layer 11, the honeycomb body 12, the surface coating layer 17 and the like is separated from the mandrel 1. At the time of this separation, pull out each angle member 9 in advance,
Keep the outer shape of the mandrel 1 small. Each surface of the separated rectangular pressure vessel shell has a slight curvature and bulges outward.

The square pressure vessel shell having such a structure is used to assemble the square pressure vessel by attaching the bottom and lid (not shown).

The square pressure vessel contains chemical substances and the pressure is 10 kgf / cm.
Used below ² . Due to the internal pressure of the contained substance, it tries to bulge outward so as to bulge. However,
This bulging deformation is favorably prevented by the inner layer 11, the honeycomb body 12, the intermediate plate 15, and the surface coating layer 17. Further, since the through hole 12a is placed on the honeycomb body 12 so as to be substantially perpendicular to each outer surface, it is effective in terms of lightweight and specific strength and specific rigidity. Furthermore, in consideration of the action direction of the stress generated by the internal pressure of the contained substance, by adjusting the direction of the fibers of the surface coating layer 17, the bulging deformation of the pressure vessel while achieving the thinning of the surface coating layer 17 is achieved. It can be suppressed well.

By the way, each surface of the shell for a rectangular pressure vessel has a slight curvature and bulges outward. In order to correct this bulging deformation, as shown in FIG. 8, the action of the extrusion means 5 is released and the correction means 21 is activated before the surface coating layer 17 is cured. As shown in detail in FIG. 11, the correcting means 21 is a flat plate 21a and a pressing member 21e, which are flat plates respectively arranged on the surface coating layer 17 having a square shape, and is inserted into the holes 2d of each rectangular plate 2. The insertion member 21b, the pressing member 21e and the bolt member 21c inserted into the insertion member 21b, and the nut member 21d screwed to the bolt member 21c. The inner layer 11, the honeycomb body 12, and the intermediate member by tightening the nut member 21d. Plate 15, surface coating layer
The swelling on each side of the square pressure vessel shell made of 17 etc. can be corrected flatly. After flattening, the surface coating layer 17 is cured and the straightening means 21 is released.

The pressure vessel using the square type pressure vessel shell that has corrected this bulge has a good square shape, so it is easier to load and transport on a vehicle, and there is almost no gap in the warehouse and it is more efficient. Can be stacked and accommodated.

〔The invention's effect〕

As can be understood from the above description, according to the present invention, the following effects can be obtained.

(1). It is possible to form a good quality surface coating layer without void defects such as bubbles and thickness unevenness between the winding surface of roving and between rovings, and manufacture a shell for square pressure vessel with excellent specific strength and specific rigidity. be able to. In addition, according to the shell for a rectangular pressure vessel manufactured by this method, outward bulging deformation due to internal pressure is suppressed by the core material forming the honeycomb body and the surface coating layer made of fiber reinforced plastic, Since the shape of the quadrangular cylinder is firmly held, a high degree of specific strength and specific rigidity is secured. As a result, the reliability and durability of the pressure vessel are both good.

(2). The square pressure vessel shell manufactured by this method has a structure having a surface coating layer made of fiber reinforced plastic on the outside of the core material made of an aluminum honeycomb or an aramid honeycomb, and is relatively lightweight.

(3). According to the pressure vessel configured by attaching the bottom portion and the lid to the square pressure vessel shell manufactured by this method,
Since it has a substantially quadrangular shape, it can be efficiently stacked and stored in a warehouse, a vehicle, or the like with almost no space.

[Brief description of drawings]

1 to 11 show one embodiment of the present invention, FIG. 1 is a view showing a mandrel, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG.
8 to 8 are views showing the manufacturing process, FIG. 9 is a schematic view showing a filament winding machine, FIG. 10 is a sectional view showing an enlarged corner portion of a shell for a rectangular pressure vessel, and FIG. 11 is a correction. It is a figure which shows a means. 1: Mandrel, 2: Rectangular plate, 3: Shaft, 4: Sliding member, 5: Extruding means,
6: Plate member, 7, 9: Angle member, 11: Inner layer, 12: Honeycomb body (core material), 12a: Through hole, 13: Fastener, 14: Packing member, 15: Intermediate plate,
17: surface coating layer, 17a: roving, 19: resin tank, 21: straightening means, 21a: straightening plate (flat plate).

Claims (2)

[Claims] 1. A method for producing a shell for a rectangular pressure vessel, comprising an aluminum honeycomb or an aramid honeycomb as a core material arranged so as to form a quadrangular tubular body, and having a surface coating layer made of fiber reinforced plastic on the outside of the core material. Then, the central portions of the respective sides of the core material arranged so as to form a quadrangular tubular body are pressed outward, and are expanded so as to extend in the direction of the central axis, thereby giving curvature to each core material. A method for manufacturing a shell for a rectangular pressure vessel, which comprises applying a roving around the core material by a filament winding method to form a surface coating layer after the application. 2. The core material and the surface coating layer are flattened by pressing the outer surface of the surface coating layer before curing with a flat plate.
A method for manufacturing the shell for a rectangular pressure vessel according to claim 1.