Transport tank and transporting method thereof

Abstract

A transport inner bag and a pressure inner bag are loaded in a tank body of a tank container. A supply-discharge opening for the transport inner bag is provided in a position corresponding to a tank supply-discharge opening, and cargo is filled through the opening. A supply-discharge opening for the pressure inner bag is provided in a position corresponding to a hatch of the tank body, and air is filled through the opening to expand the pressure inner bag, so that a space between the transport inner bag and an inner surface of the tank body is filled as well as the gap in between. This prevents the transport inner bag from moving in the tank body in transporting in a state that the cargo is not fully loaded in the transport inner bag, so that the breakage of the transport inner bag caused by the movement is prevented.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a transport tank to be transported with containing a cargo in a transport inner bag, and more specifically, a transport tank having a pressure inner bag for preventing the transport inner bag from moving in a tank body of the transport tank during transportation, and transporting method thereof. [0003] 2. Description of the Prior Arts [0004] In cargo transportation by sea, railroad, road and so forth, a tank container is generally used for liquid materials (cargo). As the tank container, a 20 foot container (hereinafter referred to as a tank container) which conforms to the ISO Standards is ordinarily used, for example. The tank container has 20 foot length, 8 foot width, and 8 foot height, so that about 20 tons of liquid can be filled therein. [0005] In the container transportation to use this kind of tank container, it is necessary to wash the inside of the tank after transportatio...

AI Technical Summary

Benefits of technology

[0009] An object of the present invention is to provide a transport tank in which a transport inner bag hardly moves if the transport tank is transported with the transport inner bag which is not fully loaded with a cargo, and a transporting method thereof.

[0012] According to the present invention, the second inner bag will expand by the filler to prevent the first inner bag from moving in the tank body during transportation, so that it is possible to settle such drawbacks as the breakage of the first inner bag due to the movement or the discharge failure of the cargo due to twist or inversion of the cargo during the transportation of the first inner bag which is not fully loaded with the cargo. In addition, a specific amount of the filler is preliminarily filled in the second inner bag to arrange the shape of the second inner bag before or while containing the cargo in the first inner bag, so that the folded second inner bag is not sandwiched between the first inner bag and the inner surface of the tank body when the cargo is put into the first inner bag. Therefore, it is possible to prevent the filling failure due to the sandwiched portion at the time of filling the filler in the second inner bag or to prevent the second inner bag from being ruptured.

Problems solved by technology

However, with respect to the prior art inner bag to be used in the tanks and tank containers, it is so difficult to produce appropriate inner bags for large tanks including the 20 foot container that there has no practical application.

Namely, it has been difficult to produce the inner bag fitting in the cylindrical 20 foot container easily and affordably.

Therefore, changing the inner bag makes it unnecessary to wash the inside of the tank.

However, the following problem occurs in process of developing the above-mentioned inner bag.

Consequently, the inner bag may be ruptured, the supply-discharge opening may crack, or the cargo may not be discharged due to twist or inversion of the inner bag.

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