JPS59200900A - Pressure vessel - Google Patents

Abstract

PURPOSE:To obtain inexpensive and highly capable pressure vessel by a method wherein a steel hoop is wound into cross winding so that the winding directions of the hoops are different mutually in the pressure vessel in which the steel hoops are wound around an inner tube both ends thereof are closed at both mirror plates. CONSTITUTION:The pressure vessel is formed by winding a plurality of layers of the steel hoops 2 continuously into spiral around the inner tube to form a layered cylinder and securing both ends of the hoops to the mirror plates 4 respectively by welding. The winding directions of the spiral windings of the steel hoops 2a, 2b of neighboring layers 3 are different mutually and the wound steel hoops 2a, 2b of each neighboring layers 3 are not welded mutually. According to this method, man-hours for manufacturing the vessel may be reduced remarkably and the inexpensive pressure vessel having sufficient capability of practical use may be obtained.

Description

[Detailed description of the invention] The present invention relates to pressure vessels.

Conventional various pressure vessel bodies are made of thick plates made of benzene roll,
Some of the well-known types include those that have been bent using a press, etc., those that are made by winding a thin plate into a spiral shape, and those that are formed by cutting a cylinder in half and stacking many thin plates to create the required container thickness.

In this way, in terms of internal pressure strength, it is advantageous to use a spiral type container body made of thin plates without circumferential welding, in which multiple spiral cylinders are connected in the longitudinal direction by welding or other methods depending on the length of the container. It is publicly known that

However, spiral-type containers are not economical due to the increase in the number of joints in the cylindrical axis direction and the associated increase in manufacturing man-hours due to restrictions on the width of thin plates that can be obtained relative to the container length due to the recent increase in container size. There are some advantages that are lost.

The present invention was proposed in view of the above circumstances, and an object of the present invention is to provide a low-cost and high-performance pressure vessel.

To this end, the present invention provides a pressure vessel in which a stratified cylinder is constructed by continuously winding a plurality of layers of steel strips in a spiral manner on the outer peripheral surface of an inner cylinder, and each end of the cylinder is closed with an end plate.
The steel strip of each adjacent layer is spirally wound in different directions so as to be cross-wound.

One embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a side view thereof, Fig. 2 is a cross-sectional view of Fig. 1, Fig. 3 is a longitudinal sectional view of Fig. 1, and Fig. 4 is a longitudinal sectional view of Fig. 1. Figure 5 ('I) and (II) are explanatory diagrams showing how to cross-wrap the steel strips in Figure 4, and Figure 6 is the VI in Figure 5. FIG. 7 is a diagram showing the relationship between the angle θ and the strength ratio α of the cross-wound multi-layer case shown in FIG.

In the above figure, 1 indicates an inner cylinder with a steel strip wrapped around the surface in a spiral shape, 2 indicates a steel strip wrapped around the inner tube 1 in a multi-layer spiral shape, and the required plate thickness t of the container body is the inner tube. It consists of a plate thickness of 1 and a plurality of steel strip plates 2, each of which forms a body. 4 is the end plate at the end of the vessel, and 5 is the welded part with the end plate of the body. Each steel strip is crossed and wrapped around each other, and the adjacent portions 3 of each wrapped steel strip are not welded together.

In order to test the performance of such a pressure vessel, the inventor developed a pressure vessel with an inner diameter of 450 mm and a length of 500 mm.

Twelve layers of broom steel plates 2 with a width of 315 mm and a plate thickness of 224 mm are cross-wound around the outer periphery of an inner cylinder 1 formed of plate thickness B, s, g and material 5S41, and the inner cylinder has a total of 13 layers. After forming the body, welded unidirectional mirror plates to both ends to create a multi-layer container.

In this winding, the angle θ is 50° to 54.7°, and the pressure resistance is 453 kg/a1, taking into account the strength of the inner cylinder l. It is estimated that the above is the result, and the result of the destructive test using water pressure is 544.
．． It shows a bursting pressure of Kti/cr&, which corresponds to about 90% of the bursting pressure of 611 Kq/att of a unidirectional container of the same plate thickness, and it was found that it has sufficient strength for practical use. The strength evaluation concept shown in Fig. 7 was confirmed to be mechanically compatible.

With this S, the figure is closed by ignoring the binding force between each layer. Therefore, it also shows the safety evaluation of the container of the present invention.

Also, considering that each steel strip deforms when internal pressure is applied so that it approaches the equilibrium angle (θ = 54.7°) at point Q shown in the same figure, the winding should be done so that the angle is slightly closer to the equilibrium angle. By setting the smaller size, the contact between adjacent parts of the wrapped steel strips is strengthened, and by setting the corner of the steel strip wrapping around the outermost part of the fuselage to an equilibrium angle, it is possible to strengthen the contact between the adjacent parts of the wrapped steel strip. /3 or higher strength is possible.

Such a spiral type multi-layer container can be made by simply welding the adjacent parts of the wound steel strips together, and by simply cross-wrapping each layer to each other, it becomes a practically sufficient container, reducing the number of man-hours required for manufacturing the container. can be significantly reduced.

In short, according to the present invention, a stratified cylinder is produced by continuously winding a plurality of layers of steel strips in a spiral shape on the outer peripheral surface of an inner cylinder.
In a pressure vessel whose both ends are closed with end plates, the spiral winding of the steel strips of each adjacent layer is made in different directions to form a cross winding, thereby obtaining a low-cost pressure vessel. It is extremely useful for industry.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
Figure 3 is a longitudinal cross-sectional view of Figure 1, Figure 4 is a partially enlarged view of section ■ in Figure 3, Figure 5 (IL (II)
is an explanatory diagram showing how to cross-wrap the steel strips in Figure 4, Figure 6 is a partially enlarged view showing part ■ in Figure 5, Figure 7
The figure is a diagram showing the relationship between the angle θ and the strength ratio α for the cross-wrapped multi-layer inner cylinder of the same plate thickness in Figure 6. 0 1. Inner cylinder, 2.2a, 2b , *e*2e...Striped steel plate, 3...Adjacent part, 4...End plate, 5...Welded part, Sub-agent Patent attorney Masafumi Tsukamoto 30 Continued from page 1 0 Inventor Tadao Ozaki Inside the Mitsubishi Heavy Industries, Ltd. Hiroshima Research Center, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima 0 Inventor: Inside the Mitsubishi Heavy Industries, Ltd. Hiroshima Research Center, 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima

Claims (1)

[Claims] In a pressure vessel in which a stratified cylinder is made by continuously winding multiple layers of steel strips in a spiral shape on the outer circumferential surface of an inner cylinder, and both ends of the cylinder are closed with end plates, the spiral of the steel strips in each adjacent layer is A pressure vessel characterized by cross-wrapping in opposite directions.