JPS6098297A - Square low temperature storage tank - Google Patents

Abstract

PURPOSE:To enable the heat shrinkage of a membrane to be moderately carried out by providing a hunch part on the corner of the body of a square storage tank and spreadingly providing a single corrugation membrane in such a way that square flat parts are arranged successively from said hunch part. CONSTITUTION:A heat insulating material 12 is attached in a layer form to a body 11, while a hunch part is provided on the corner of the body 11. By spreadingly providing a single corrugation membrane on the heat insulating material 12 in such a way that, with a triangular flat part 13, which is created by providing such a hunch part, used as a center, square flat parts 14 are arranged successively from the part 13, it becomes possible that the rotation of the adjacent flat parts 13, 14 can be made reversed to each other. Thereby, the heat shrinkage of the membrane can be moderately carried out.

Description

[Detailed description of the invention] The membrane stretched directly on the inner circumference of the cold insulation material of the low temperature storage tank has
Vertical and horizontal corrugations are usually placed in order to absorb the heat shrinkage strain that occurs in menstrual lenses. The method of crossing vertical and horizontal corrugations is the double corrugation method, in which one corrugation is three-dimensionally superimposed on the other corrugation, and the other is the double corrugation method, in which one of the corrugations that is about to intersect is annihilated, and the corrugations are combined into one. A single corrugation method can be considered to avoid this.

Figures 1 and 2 show typical examples of the single corrugation system, where (1) shows the flat part of the membrane, (2
) shows the corrugation, and (3) shows the shape of the corrugation when it is heat-shrinked. The corrugations are arranged as shown in FIG. 4) is provided. Note that (5) in the figure is the rotation center of the flat portion (1), and adjacent flat portions rotate in opposite directions. Note that (6) in the figure shows the position of the proximal edge of the corrugation after heat shrinkage.

If the single corrugation membrane shown in FIGS. 1 and 2 is applied as it is to the six intersecting corners of a rectangular storage tank, the corrugation arrangement will be as shown in FIG. , Also, in part B, the corrugation necessary to absorb heat shrinkage is cut,
Distortion occurs in the membrane.

For this reason, single corrugation is used for flat or cylindrical storage tanks that become flat when expanded, but is not applied to rectangular storage tanks that have three-dimensional corners.

The present invention has been proposed to enable the construction of a rectangular storage tank with a single corrugation and to expand the scope of application of the single corrugation. A rectangular low-temperature storage tank characterized in that a single corrugation membrane is stretched on the inner surface of the storage tank so that a triangular flat part formed by providing a triangular flat part is the center and a rectangular flat part continuous to the same part is arranged. This is related.

In the present invention, as described above, haunch portions are provided at the corners of the frame of the rectangular storage tank, and the inner surface of the storage tank is arranged so that the rectangular flat portion is successively arranged around the triangular flat portion thus created. Since a single corrugation membrane is stretched over the membrane, it is possible to reverse the rotation of adjacent flat parts, and the membrane can be easily heat-shrinked.

In addition, in the present invention, by providing haunches at the corners of the storage tank frame, the strength and rigidity of the frame can be improved, etc.
The invention has many advantages.

The present invention will be described below with reference to the illustrated embodiments.

aO is the frame of the rectangular storage tank, α is the frame (IDK layered cold insulation material), and a notch portion is provided at the corner of the frame (tl).

By arranging the single corrugation membrane so that the triangular flat part αJ created by providing the hump part is the center and the rectangular flat part αa successively connected to the same part is arranged, It becomes possible to reverse the rotation of each of the adjacent flat portions (13) Q4), and thus the membrane thermally shrinks without difficulty.

Furthermore, the strength of the frame (11) is increased by providing corbels at the corners of the frame αυ that supports the membrane.

The rigidity is increased.

The storage tank side wall and ceiling membranes are supported by the frame (11) via anchors provided at the center of rotation of the flat portion or at the fixed point 0 of the corrugation.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the arrangement of the membrane with single corrugation, Fig. 2 is a plan view thereof, Fig. 3 is a perspective view showing the arrangement of the membrane in the corner of a rectangular storage tank, and Fig. Figure 4 shows an embodiment of the rectangular low-temperature storage tank according to the present invention.Slope -1ai+...Structure, Sauce...Cold insulator, 0th floor...Triangular flat part, α Enoki...Square flat part

Claims (1)

[Claims] A single corrugation membrane is placed on the inner surface of the storage tank so that a rectangular flat part is placed around the triangular flat part created by providing a notch part in the corner of the rectangular storage tank, and continues to the round part. A rectangular low temperature storage tank characterized by: