JPH0413230B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a liquid tank such as an oil tank.

(Prior Art) There is a demand for storing different types of liquids simultaneously in one liquid tank. For example, two types of oil are stored simultaneously in an oil tank. In response to these requirements, the simplest structure is to provide a bag made of a flexible membrane material within a liquid tank.

(Problems to be Solved by the Invention) However, this structure also has the following problems. That is, how to remove the gas inside the bag.

The simplest solution is to forcibly raise a portion of the top of the bag, such as the one shown in Figure 1. However, in this case, there is a drawback that extremely excessive stress is concentrated in the portion that is forcibly raised. In FIG. 1, 1 is a liquid tank, 2 is a bag (when full), 2' is a bag (empty), and 4 is a gas vent pipe (fixed).

In view of the above, the present invention has been developed to solve these problems.

(Means for Solving the Problems) That is, the present invention provides a liquid tank in which a bag made of a flexible membrane material is provided inside a liquid tank, and in which the bag serves as a storage chamber for a different type of liquid. The bag is suspended from the tank ceiling or the top of the tank, and the bag is connected to a tube that moves up and down as the height changes, forming a bag degassing mechanism, and a floating body is attached to the top surface of the bag around the part where the tube is connected. It is a liquid tank.

(Function) The tank of the present invention will be described in detail below in a non-limiting manner with reference to the illustrative drawings. The principle of the present invention is shown in FIGS. 2 and 3. However, FIGS. 2 and 3 are only examples and the present invention is not limited thereto. As shown in FIG. 2, a pipe 5 for degassing is hung from the tank ceiling or the top of the tank, usually at the center of the top surface of the bag, and connected to the top surface of the bag. The tube can be moved up and down as the height of the bag changes (when pouring and draining the liquid in the bag), thereby avoiding excessive stress on the connection.
In the example shown in FIG. 2, a suitable weight 10 is attached to the end of the tube (outside the tank). Furthermore, the second
In the figure, 3 indicates a guide roller, and the same reference numerals as in FIG. 1 indicate the same parts.

In addition to the above, a floating body 7 is attached around the connecting part 6 as shown in FIG. 3, thereby offsetting the weight of the metal fittings of the connecting part and making the connecting part even slightly higher than the top surface of the other bags. The floating body shows an example in which a foam body 8 is housed in a space sealed with a membrane material similar to that of a bag.
Note that 2 in FIG. 3 indicates a bag.

Note that FIG. 4 shows an example of the shape of the bag provided in the present invention, where FIG. 4a shows a sealed bag and FIGS. b and c show a bag with an open bottom.

(Effects of the Invention) According to the liquid tank of the present invention which can store different types of liquids at the same time as described above, the pipe connected to the gas venting part of the bag moves up and down due to changes in the height of the bag, so there is an excessive burden on the connecting part. It is safe because stress is not concentrated.

Furthermore, since the floating body is attached to the upper surface of the bag around the part where the pipe is connected, the concentration of excessive stress on the connecting part is reduced to the maximum, and a safe degassing mechanism is provided, and degassing is ensured.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view for explaining a conventional liquid tank, FIG. 2 is a schematic vertical cross-sectional view of a tank for explaining the liquid tank of the present invention, and FIG. 3 is a schematic vertical cross-sectional view for explaining the liquid tank of the present invention. FIGS. 4a, 4b, and 4c, which are enlarged views of the connecting portion between the tube and the bag, are illustrations of the shape of the bag provided in the liquid tank of the present invention, respectively. 1...Liquid tank, 2...Bag (full), 2'...Bag (empty), 3...Guide roller, 4...Gas venting pipe (fixed), 5...Gas venting pipe (movable), 6...Connection part, 7...
Floating body part (floating body container), 8...foam, 10... weight.

Claims (1)

[Scope of Claims] 1. In a liquid tank in which a bag made of a flexible membrane material is provided inside the liquid tank, and the bag is used as a storage chamber for a different type of liquid, the upper surface of the bag is provided with a bag made of a flexible membrane material from the tank ceiling or the upper part of the tank. A liquid tank characterized in that a tube that moves up and down as the height of a suspended bag changes is connected to serve as a bag degassing mechanism, and a floating body is attached to the upper surface of the bag around the part where the tube is connected. 2. The liquid tank according to claim 1, which uses a sealed bag to provide a bag inside the liquid tank. 3. The liquid tank according to claim 1, wherein the bag is provided inside the liquid tank by fixing the open end side of the bag whose bottom side is open to the bottom of the tank. 4. The liquid tank according to claim 1, wherein the bag is provided inside the liquid tank by fixing the open end side of the bag whose bottom side is open to the side surface of the tank.