JPS6220113B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid tank containing two liquids, such as two liquid petroleum products, having different maximum storage amounts.

There is a request to store two liquids in one tank.
When it becomes increasingly difficult to secure space for tanks, as has been the case recently, these demands are urgent. In particular, there is a strong demand for a device with variable storage capacity for two liquids. For example, there are requests such as:

When tank capacity V _O , storage amount V _A of liquid A, and storage amount V _B of liquid B, V _A /V _B =0~V _O /0~V _O However, V _A +V _B ≦V _O
〓1 That is, the maximum storage amount of liquid A and liquid B is the tank capacity V
It is _O.

For such a request (〓1), the first, second,
A tank equipped with a flexible diaphragm as shown in Figure 3 is applied. FIG. 1 shows a vertical diaphragm, and the diaphragm 6 or 7 has a shape obtained by vertically dividing the tank 1 or 2 symmetrically.

FIG. 2 shows a diagonal diaphragm, and the diaphragm 8 has a shape obtained by diagonally dividing the rectangular tank 3 having a square cross section symmetrically.

FIG. 3 shows a horizontal diaphragm, and the diaphragm 9 or 10 has a shape in which the tank 1 or 2 is vertically symmetrically divided.

However, in some cases, there may be requests to do the following.

V _A /V _B =0~V _AM /0~V _O However, V _AM <V _O , V _A
+V _B ≦V _O 〓2 That is, the maximum storage amount of liquid B is the tank capacity V _O , but the maximum storage amount of liquid A V _AM is considerably smaller than V _O.

In response to this requirement (2), the vertical diaphragm shown in FIG. 1, the diagonal diaphragm shown in FIG. 2, and the horizontal diaphragm shown in FIG. 3 are economically disadvantageous. In other words, the size of the diaphragm and the length of the attachment line are such that the maximum storage amount of liquids A and B is V _O , and in the case of requirement (〓2), the relative considered excessive.

However, if a diaphragm is provided so that the storage chamber of liquid A becomes V _AM , when V _A = V _AM and V _B = 0, the liquid pressure is supported by the diaphragm, so there is a large tension in the diaphragm. , an excessive concentrated load is applied to the mounting part, which poses a structural problem. Figure 4 shows the shape of a square tank 2 divided vertically (however, the tank is not vertically divided symmetrically like a vertical diaphragm).
Such a situation is exemplified by a device provided with a diaphragm 11 (l>L). The same applies to the shape of a cylindrical tank divided vertically as shown in Figure 4, or the shape of a square tank divided diagonally (not a square tank with a square cross section divided diagonally symmetrically like a diagonal diaphragm). (not shown).

Requirement (2) seems to be relatively easy to meet if the diaphragm has a shape that extends above and below the tank, such as the horizontal diaphragm shown in FIG. That is, as shown in FIG. 5, which takes the cylindrical tank 1 as an example, the storage chamber at the bottom of the diaphragm 9' that divides the tank horizontally (a diaphragm that does not substantially vertically symmetrically divide the tank laterally like a horizontal diaphragm) is V _AM (h<H).

However, the problem is that liquid A is placed at the bottom of the horizontal diaphragm.
The injection mechanism and the discharge mechanism for the liquid B placed in the upper part require complicated ingenuity. Also, the specific gravity of liquid A is
When the specific gravity is smaller than , buoyancy acts on the liquid A, and as shown in FIG. 6, a large tension is exerted on the diaphragm and an excessively concentrated load is exerted on the attachment part. In FIGS. 1 to 6, 4 is liquid A, 5 is liquid B, and 12 is a mounting portion.
Also, the dotted line is the position of the diaphragm when liquid A is empty and liquid B is at its maximum storage capacity, the broken line is the position of the diaphragm when liquid A is at its maximum storage capacity and liquid B is empty, and T is the position of the diaphragm when liquid A is at its maximum storage capacity. F is the tension that acts on the diaphragm when liquid B is empty, and F is the concentrated load that is applied to the attachment part when T is applied.

In view of the above, the present invention was developed to solve these problems. The invention will now be explained in detail in a non-limiting manner with reference to the illustrative drawing of FIG.

A small tank (capacity V _AM ) 14 is provided inside the large tank (capacity V _O ) 13, and the small tank 1
4 is provided with a vertical diaphragm 6 or an oblique diaphragm depending on its shape. The small tank is divided into two storage chambers by a diaphragm, and one of the storage chambers is assumed to contain liquid A4. The other storage chamber is to be filled with liquid B5, and a hole 15 or slit is provided in the wall of the small tank on the side where liquid B5 is placed, so that liquid B5 can freely enter and exit the small tank. It shall be possible to enter and exit. That is, it is assumed that the entire space surrounded by the diaphragm 6, the small tank 14, and the large tank 13 is used as a storage chamber for the liquid B5.

FIG. 7 shows an example in which a small cylindrical tank is provided within a large cylindrical tank 13 and a vertical diaphragm 6 is provided.
The line E containing × is the position of the diaphragm when liquid A is at its maximum storage capacity, and the line F containing ○ is the position of the diaphragm when liquid A is empty and liquid B has a liquid level height that is at least higher than the height of a small cylindrical tank. The position of the diaphragm is shown. It is assumed that the inlet/outlet for the liquid A is provided, for example, from the bottom of a small tank (not shown).

In addition, although not shown, there is a method in which a small rectangular tank is provided within a large cylindrical tank and a vertical diaphragm is provided, or a method in which the cross section of the small rectangular tank is square and a diagonal diaphragm is provided.

Furthermore, there are those in which a small cylindrical tank or a small rectangular tank is provided within a larger rectangular tank and a vertical diaphragm is provided, and there are those in which a diagonal diaphragm is provided in a small rectangular tank with a square cross section.

As is clear from the above, the tank of the present invention is economical because the diaphragm can be made smaller when the maximum storage amount of liquid A is required to be considerably smaller than the maximum storage amount of liquid B (2). Also, even when V _A = V _AM and V _B = 0, liquid A
Since the hydraulic pressure caused by this is supported by the walls of the small tank, there is no large tension on the diaphragm and no excessive concentrated load on the mounting part, which is advantageous from a structural standpoint.

In addition, the idea of putting two types of liquids in one tank has traditionally been the idea of installing a partition plate in the tank, but compared to a diaphragm, this has considerable problems in tank utilization, reinforcement of the partition plate, etc., and is not suitable for large tanks. Therefore, it was difficult to recruit.

[Brief explanation of the drawing]

Figures 1 to 3 (only a and b in Figure 2) are diagrams explaining conventional liquid tanks; in these figures, a and c are sectional views of the tank, and b and d are a and c, respectively.
Figures 4 and 5 are diagrams for explaining tanks that can be considered from conventional liquid tanks; in these figures, a is a sectional view of the tank, b and a are perspective views of the diaphragm used, FIG. 6 is a diagram illustrating a problem with the tank shown in FIG. 5, and FIG. 7 is a sectional view illustrating the tank of the present invention. 1... Cylindrical tank, 2... Square tank, 3... Square tank (square cross section), 4... Liquid A, 5... Liquid B, 6...
Vertical diaphragm for cylindrical tanks, 7... Vertical diaphragms for square tanks, 8... Diagonal diaphragms for square tanks (square cross section),
9...Horizontal diaphragm for cylindrical tank, 9'...Horizontal diaphragm for cylindrical tank, 10...Horizontal diaphragm for square tank, 11
... Vertical diaphragm for square tanks, 12... Mounting part (not shown as mounting line), 13... Large cylindrical tank, 14... Small cylindrical tank, 15... Hole provided in small cylindrical tank (for liquid B). It is actually a communication hole).

Claims (1)

[Claims] 1. A small tank is placed inside a large tank, and the small tank is provided with a vertical or diagonal diaphragm depending on its shape, and one space of the small tank separated by the diaphragm is used as one liquid storage chamber. For the other space, a hole or slit is provided in the wall of the small tank in that area so that the liquid can freely flow in and out of the small tank. A liquid tank characterized in that the sum of the spaces surrounded by a small tank wall and a large tank wall constitutes another liquid storage chamber.