JPS6019877A - Inner float type tank roof assembling method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling a fixed roof of an inner float type tank.

In general, so-called inner floats are used to store liquids such as pure water that do not want to be mixed with rainwater or oxygen, or highly volatile liquids such as gasoline, which have a floating roof inside a cylindrical tank with a fixed roof. A type tank is used. Conventionally, when assembling a fixed roof for such an inner float type tank, as shown in FIG. Generally, a fixed roof is assembled using scaffolding 6 of a predetermined height temporarily installed over the entire surface of the floating roof S. However, such a conventional roof assembly method requires a large-scale scaffold 6, which requires a great deal of labor to assemble, dismantle, and transport, which greatly affects the construction period and increases costs. Additionally, work at heights is extremely dangerous. In addition, as another example of the conventional roof assembly method,
There is a method of assembling a fixed roof on top of the floating roof, using pressurized air or water between the floating roof and the fixed roof to float the fixed roof or the fixed roof and the floating roof together and fixing it to a predetermined position. However, it has drawbacks such as the troublesome installation and removal of flotation equipment, and the need for troublesome adjustment to attach the roof periphery to the upper end of the side plate. Yet again.

These conventional roof assembly methods have a number of drawbacks, such as the fact that long-term pressure tests by filling the tank with water cannot be performed until after the tank is completed.

Therefore, an object of the present invention is to eliminate these conventional drawbacks by filling a tank with water to float a floating roof, and then assembling a fixed roof on top of the floating roof, thereby safely and easily. It is also possible to assemble the roof at low cost.
To provide a method for assembling the roof of an inner float type tank, which can shorten the construction period by carrying out a water pressure test of the tank at the same time as assembling the roof.

According to this invention, the roof assembly method for an inner float tank is such that after the assembly of the tank side plates is completed, the floating roof assembled on the bottom plate in the tank side plate is floated to a predetermined height by filling with water, and temporary construction is carried out on the floating roof. It consists of assembling a fixed roof using supporting members such as scaffolding and pillars.

Other objects, features and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 2 of the drawings shows an embodiment of the method for assembling the roof of an inner float tank according to the present invention. In this embodiment, first, the tank side plate 13 is assembled on top of the tank bottom plate /l/, and in parallel, the tank side plate 13 is assembled on top of the tank bottom plate /l/.
Assemble the floating roof/6 on top of the support member/left provided at the bottom. After the side plate 13 and the floating roof/Af are completed, water is filled in the tank and the floating roof/Af is floated to an optimal height. At this position, the floating roof /l is temporarily fixed to the side plate 13 by a stopper /g to prevent movement such as rotation or rocking. At this point, the pressure test by filling with water can be started. Next, temporarily install the support column /9 at the center of the tank above the floating roof /6.

Scaffolding 17 is erected around this pillar /q. These pillars/
Using q and scaffolding /7, cross the roof frame l/ from the pillar /9 to the upper end of the side plate 13, place the roof plate /2 on top of this roof frame /l, and install the fixed roof IO. Assemble. Finally, the pillars /9, scaffolding /7, support members /l, and other supporting members for supporting the roof frame /l were removed.

The assembly of the fixed roof IO is completed.

As described above, according to the present invention, by making a fixed roof using a floating roof, the fixed roof and floating roof can be worked in close proximity, resulting in high safety. It can be of low height and does not require scaffolding in the special pressure peripheral area, so assembly and removal work is easy and economical. Furthermore, compared to the conventional method of floating a fixed roof using pressurized air or water and fixing it to the upper end of the side plate, the work is easier because there is no need to adjust the connection between the peripheral edge of the roof and the upper end of the side plate. When assembling a floating roof, according to this invention, it is only necessary to prepare a sufficient number of supporting members to support the load of the floating roof alone. The number of supporting members can be reduced compared to the case where Furthermore, since the water filling pressure test and fixed roof assembly can be performed in parallel, the construction period can be significantly shortened.

There are many advantages.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional roof assembly method for an inner 7a-) type tank, and FIG. 2 is a schematic diagram showing an embodiment of the roof assembly method according to the present invention. In the figure. /, /θ: Fixed roof, /3: Tank side plate. ,? , /41: Tank bottom plate, /S: Support member, 5°lA: Floating roof, A, /7: Scaffolding, tt: Stopper, lq: Support. Patent applicant: Toyo Kanetsu Co., Ltd.

Claims (1)

[Claims] After completing the assembly of the tank side plates, the floating roof assembled on the bottom plate inside the tank side plate is floated to a predetermined height by filling with water, and a fixed roof is installed using supporting members such as scaffolding and pillars temporarily installed on the floating roof. A method for assembling the roof of an inner float tank.