JPH0579598A - Perssure container - Google Patents

Abstract

PURPOSE:To improve the pressureproofness and appearance and shape by carrying out winding through the transition from a trajectory passing through the vicinity of a polar point to a trajectory passing through the low latitude each time when a stiffening member increases its turn and/or through the transition from the trajectory passing through the low latitude to the trajectory passing through the vicinity of the polar point. CONSTITUTION:As for the trajectory of a filament winding, winding starts from the position in contact with a mouthpiece part 4 as shown by the trajectory 1, and the shift towards a trajectory 3 passing through the low latitude is performed together with the increase of turns. Further, on the contrary, winding is performed through the shift toward the trajectory 1 from the trajectory 3. Accordingly, the helical winding in winding of 20 deg. for a liner 5 made of aluminium is carried out, allowing carbon fibers to be impregnated with epoxy resin, through the filament winding method. Accordingly, as for a shaped pressure container, a winding trajectory on a dome part is newly formed, and the reduction of weight and the superior pressureproofness are secured, and the outside appearance and shape can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure vessel that is lightweight, has high pressure resistance, and has an excellent external shape.

[0002]

2. Description of the Related Art Conventionally, a metal container has been used as a container for enclosing gas, liquefied gas and the like. However, if the wall thickness is increased in order to increase the pressure resistance, the weight becomes extremely heavy, and there are drawbacks such as easy corrosion. Therefore, recently, a pressure vessel made of a composite material that is lightweight, has high pressure resistance, and is excellent in corrosion resistance has been developed and is being put into practical use as a consumer product.

Composite pressure vessels are generally manufactured by the filament winding method. There are helical winding, in-plane winding, and polar winding for winding the dome portion, and it is known that winding is performed by contacting the reinforcing materials to the caps at both ends of the liner.
Also, when designing a filament winding container, the fiber orientation angle of the dome, stress distribution, etc. can be obtained by various theories, but in this case as well, it is a prerequisite for calculation that the reinforcing material is wound in contact with the base. Is becoming (For example, filament winding [Nikkan Kogyo Shimbun]
1970)

[0004]

However, when the reinforcing material is wound so as to be in contact with the die in this manner, the thickness in the vicinity of the die (in the vicinity of the pole) is actually excessively thicker than other thicknesses of the dome portion. Become. This tendency becomes more remarkable as a large container is wound with a thin reinforcing material. If the winding thickness in the vicinity of the die is excessively increased in this manner, slippage of the reinforcing material is caused, the winding shape is broken, and the breaking strength is reduced. Further, it is inefficient in that extra reinforcing material is partially wound, and there arises a problem that the outer shape of the winding is impaired.

[0005]

The present inventors have found that the above problems can be solved by fundamentally changing the winding trajectory of the reinforcing material in the dome portion of the pressure vessel from the conventional method. Reached

That is, according to the present invention, in the dome portion of the pressure vessel in which the fiber reinforced layer is formed by the filament winding method, the reinforcement moves from the orbit passing near the poles to the orbit passing through the low latitude every time the reinforcing material goes around. While and / or while transitioning from an orbit passing through a low latitude to an orbit passing near a pole, there is provided a pressure vessel characterized by being wound.

The present invention will be described below with reference to the drawings. FIG. 1 shows a conceptual diagram of the pressure vessel dome portion. In the present invention, the trajectory of filament winding is
First, start winding from the position where it contacts the base like track 1,
It is preferable to shift to the direction of the orbit 3 passing through the low latitude each time the orbit is repeated. On the contrary, good results can be obtained by performing winding while moving from the track 3 to the track 1 or by appropriately combining the two tracks.

In the present invention, the filament winding method may be either dry or wet, and the winding may be helical, in-plane or polar. As the reinforcing material, generally used fibers or tapes having high strength and high elastic modulus can be used. Particularly, carbon fibers, aramid fibers, and glass fibers are preferable in terms of practical performance. Further, the matrix resin can be appropriately selected from thermosetting or thermoplastic resins according to the required characteristics.

[0009]

Example: While impregnating carbon fiber with epoxy resin,
The aluminum liner was helically wound at a winding angle of 20 °. At this time, winding was performed while shifting the orbit from the vicinity of the pole to a predetermined angle in the low latitude direction. Furthermore, hoop winding was performed on the cylindrical portion. When the hydrostatic breakdown test of this sample was performed, it was 920 kg / cm ^2.
It was destroyed from the cylindrical part. For comparison with this, the winding was performed under the same conditions except that the winding was always in contact with the base. This sample has a breaking strength of 870 kg.
/ Cm ² It was destroyed from the dome part. As described above, according to the winding of the present invention, the breaking strength was increased even when the same amount and the same amount of the reinforcing material were used. Further, while the product of the present invention has a beautiful external shape, the comparative product is not preferable because of the excessively raised peripheral portion only in the periphery of the die.

[0010]

According to the pressure vessel of the present invention, in the dome portion of the pressure vessel in which the fiber reinforced layer is formed by the filament winding method, the orbit passing through the vicinity of the pole changes to the orbit passing through the low latitude every time the reinforcing material goes around. It is characterized in that it is wound while transitioning and / or transitioning from an orbit passing through low latitude to an orbit passing near the pole. As a result, even if the same reinforcing material and matrix resin are used, the fracture strength is higher than that of the conventional method. The reason for this is not fully understood, but one possible reason is that the reinforcing material is not concentrated in the vicinity of the base of the dome portion, but is effectively dispersed in other portions. Further, it has been found that the production efficiency is increased and the appearance shape is excellent in that no extra reinforcement material is wound.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a dome portion of a pressure vessel according to the present invention.

[Explanation of symbols]

 1 Reinforcement winding orbit 2 Reinforcement winding orbit 3 Reinforcement winding orbit 4 Clasp 5 Liner E Equator M Meridian

Claims (1)

[Claims] 1. In a dome portion of a pressure vessel in which a fiber-reinforced layer is formed by a filament winding method, each time the reinforcing material goes around, it moves from an orbit passing near the pole to an orbit passing through a low latitude, and / or A pressure vessel characterized by being wound while transitioning from an orbit passing through low latitude to an orbit passing near the pole.