Method for constructing triple-shell tank

Patent metadata

Field	Value
Publication number	US-12358713-B2
Application number	US-202218724030-A
Country	US
Kind code	B2
Filing date	Dec 21, 2022
Priority date	Dec 27, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate. According to the construction method, an intermediate tank roof is temporarily fixed onto an inner tank roof to form a connected roof body, a guide side plate having a predetermined height is installed around the connected roof body, a sealing process is performed between an outer peripheral edge of the connected roof body and an inner face of the guide side plate to form a sealed space, air is supplied to the sealed space to air-raise the connected roof body, at least a part of an outer tank roof is formed on the intermediate tank roof of the air-raised connected roof body, and an outer tank side plate is installed around the guide side plate.

First claim

The invention claimed is:

1. A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate, the method comprising:
temporarily fixing an intermediate tank roof onto an inner tank roof to form a connected roof body;
installing a guide side plate having a predetermined height around the connected roof body;
performing a sealing process between an outer peripheral edge of the connected roof body and an inner face of the guide side plate to form a sealed space, and supplying air to the sealed space to air-raise the connected roof body; and
forming at least a part of an outer tank roof on the intermediate tank roof of the air-raised connected roof body, and installing an outer tank side plate around the guide side plate.

2. The method for constructing a triple shell tank according to claim 1 , wherein
a temporary support is placed on the intermediate tank roof of the air-raised connected roof body; and
the outer tank roof is installed on the temporary support, and subsequently the outer tank roof and the outer tank side plate are fixed.

3. The method for constructing a triple shell tank according to claim 1 , wherein
the guide side plate is an inner tank side plate, and an intermediate tank side plate having a predetermined height is installed around the inner tank side plate,
in the air-raising, a sealing process is performed between an outer peripheral edge of the inner tank roof and an inner face of the inner tank side plate to form a sealed space, and
after the air-raising, the inner tank roof and the inner tank side plate are fixed, subsequently the temporary fixing of the connected roof body is released to fix the intermediate tank roof and the intermediate tank side plate.

4. The method for constructing a triple shell tank according to claim 3 , wherein an inner tank bottom plate constituting a bottom part of a region surrounded by the inner tank side plate is formed at least before the air-raising.

5. The method for constructing a triple shell tank according to claim 3 , wherein
the inner tank side plate, the intermediate tank side plate, and the outer tank side plate are assembled by stacking a plurality of circular steps formed by arranging a plurality of side plate pieces in a circular ring shape, and
the circular step of the inner tank side plate, the circular step of the intermediate tank side plate, and the circular step of the outer tank side plate are stacked in parallel.

6. The method for constructing a triple shell tank according to claim 3 , wherein
the inner tank side plate and the intermediate tank side plate are assembled by stacking a plurality of circular steps formed by arranging a plurality of side plate pieces in a circular ring shape, and
the circular step of the inner tank side plate is assembled to an uppermost step prior to the intermediate tank side plate to fix the circular step of the uppermost step and the outer peripheral edge of the inner tank roof.

7. The method for constructing a triple shell tank according to claim 1 , wherein
the guide side plate is an intermediate tank side plate,
in the air-raising, a sealing process is performed between an outer peripheral edge of the intermediate tank roof and an inner face of the intermediate tank side plate to form a sealed space,
after the air-raising, an inner tank side plate having a predetermined height is installed inside the intermediate tank side plate, and
the intermediate tank roof and the intermediate tank side plate are fixed, subsequently the temporary fixing of the connected roof body is released to fix the inner tank roof and the inner tank side plate.

8. The method for constructing a triple shell tank according to claim 7 , wherein an intermediate tank bottom plate constituting a bottom part of a region surrounded by the intermediate tank side plate is formed at least before the air-raising.

9. The method for constructing a triple shell tank according to claim 3 , wherein
the intermediate tank side plate and the outer tank side plate are assembled by stacking a plurality of circular steps formed by arranging a plurality of side plate pieces in a circular ring shape, and
the circular step of the intermediate tank side plate and the circular step of the outer tank side plate are stacked in parallel.

10. The method for constructing a triple shell tank according to claim 3 , wherein the outer tank side plate is installed prior to installation of the inner tank side plate after the air-raising.

11. The method for constructing a triple shell tank according to claim 1 , wherein
the guide side plate is an intermediate tank side plate,
in the air-raising, a sealing process is performed between an outer peripheral edge of the inner tank roof and an inner face of the intermediate tank side plate to form a sealed space,
after the air-raising, an inner tank side plate having a predetermined height is installed inside the intermediate tank side plate, and
the intermediate tank roof and the intermediate tank side plate are fixed, subsequently the temporary fixing of the connected roof body is released to fix the inner tank roof and the inner tank side plate.

12. The method for constructing a triple shell tank according to claim 11 , wherein
the outer peripheral edge of the inner tank roof includes an inner tank knuckle plate, and
the sealing process includes a process of attaching a temporary roof closing a space between the inner tank knuckle plate and the inner face of the intermediate tank side plate to the inner tank knuckle plate.

13. The method for constructing a triple shell tank according to claim 1 , wherein the air-raising is executed in a state where an outer tank roof piece constituting the outer tank roof is mounted on the intermediate tank roof of the connected roof body.

14. The method for constructing a triple shell tank according to claim 1 , wherein
a first construction opening, which is a construction entrance, is opened in the outer tank side plate when the outer tank side plate is installed,
a second construction opening is opened in the inner tank side plate when the inner tank side plate is installed, and a third construction opening is opened in the intermediate tank side plate when the intermediate tank side plate is installed,
the second construction opening is sealed after completion of work inside the inner tank, and then the third construction opening is sealed after completion of work inside the intermediate tank, and
subsequently, the first construction opening is sealed after completion of work inside the outer tank.

Assignees

• Kawasaki Heavy Ind Ltd

Inventors

• Komatsu Takanori
• Terabayashi Masato
• Nakayama Makoto
• Kinoshita Teruaki
• Namiki Yuji

Classifications

• B65D88/08

  with a vertical axis · CPC title

• B65D81/3881

  formed with double walls, i.e. hollow · CPC title

• B65D90/12

  Supports · CPC title

• B65D90/024

  with features of cylindrical curvature · CPC title

• B65D88/06

  cylindrical (B65D88/12 takes precedence) · CPC title