JPS6145030B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention involves installing a crane inside a concrete frame formed in the ground and assembling each member using the crane when constructing an underground tank for oil storage, etc. This invention relates to a method of welding and installing a bottom plate, a floating roof, etc., and in particular, a rail material is fixed in a ring shape to a side wall concrete, a crane post is established on the bottom plate concrete, and the upper end of the crane post and the above-mentioned A crane girder is installed between the rail material, and the tank components are lifted and suspended via a crane truck installed on the crane girder and a hook such as a hoist suspended from the truck, and moved in the radial direction of the tank. This invention relates to a floating roof tank installation method in which construction is performed by rotating the girder.

<Prior Art> As is well known, various types of storage tanks for petroleum, etc. have been built and operated in the past, each having advantages and disadvantages, and are constructed according to design conditions.

Among them, floating roof tanks are widely used because of their simple structure and easy maintenance.

However, on the other hand, when constructing a floating roof tank, since it is first formed on the bottom plate,
There were problems not only with the formation of the bottom plate itself, but also with the construction efficiency of the tank as a whole.

That is, as shown in FIG. 1, a balance crane 4 is installed at the center of the bottom plate 3 of the concrete frame 2 of the underground tank constructed by excavating the ground 1, and using this, the inner lining bottom plate 5 is installed. After that, a scaffold 6 is set on the bottom plate 5, and a floating roof 7 is placed on top of it.
I was trying to assemble it.

<Problems to be Solved by the Invention> By the way, according to this type of balance crane installation method, basically due to the balance limit of the balance crane 4 itself, it is difficult to assemble the weight blocks of members such as the bottom plate 5 and the floating roof 7. There is a drawback that there are restrictions on attachment,
Furthermore, aside from the case of small and medium diameter tanks, when it comes to large diameter tanks, the bottom plate 5 and floating roof 7 also become larger in diameter, which increases the arm length of the crane and increases the balance weight accordingly. The crane had to be placed far away from the center, resulting in a large-scale crane structure, and there was an inconvenience that the work operation was not smooth due to the inertia of the balance weight.

And instead of a balance crane, for example,
In some cases, guiding devices are installed on the base of the bottom of the tank, but there is a limit to their operating radius, and there are also elements that limit the movement of the boom, such as the center post's retainer wire, and this is especially true when constructing concrete for lining side plates. There were also inconveniences such as interference.

The purpose of this invention is to solve the technical problem of crane operation when constructing a floating roof tank based on the above-mentioned conventional technology, and to make it possible to easily form a tank bottom plate and a roof, and to easily construct even large tanks. It is an object of the present invention to provide an excellent floating roof tank installation method that allows smooth setting and resetting of construction equipment and is beneficial to the field of tank technology utilization in the energy industry.

<Means/effects for solving the problems> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned claims and in accordance with the above-mentioned object, is to install a tank in a tank excavated into the ground. Rail material is buried in a ring shape in the side wall of the concrete frame in advance, a crane post is established on the bottom plate, a crane girder is installed between the upper end of the rail material and the rail material, and the crane girder is rotated around the crane post. At the same time, the crane truck was moved along the crane girder, and the parts were assembled and welded using the hook of the hoist suspended from the crane truck, and a lining bottom plate was formed at the bottom. A roof was formed, and the side walls were used to form side plates for concrete rolling. Also, the crane girder and crane post were dismantled after the fact, and technical measures were taken to use the rail materials as reinforcing ribs for the lining side plates. It is something.

<Embodiment> Next, an embodiment of the present invention will be described below with reference to FIG. 2 and the following drawings. Note that the same parts as in FIG. 1 will be explained using the same reference numerals.

In the process of pouring the concrete frame 2 as the outer wall of the tank in a site excavated in the set ground 1, after pouring the bottom plate 3, when pouring the side wall 3', studs 8 are integrally placed at the set height position all around the circumference. buried,
Furthermore, a rail material 10 made of H-shaped steel is integrally provided on the liner 9 of the stud 8 in a ring shape in the circumferential direction.

On the other hand, a crane post 11 suspended from a heavy machine (not shown) on the ground surface is fixed to the center of the bottom plate 3 of the concrete frame 2 using studs for the lining bottom plate, and A suspended crane girder 12 is supported with its base end on the upper part of the crane post 11 in a loose state, and the crane girder 12 is constructed as shown in FIG. 4 in detail.
A roller 14 pivotally supported by a bracket 13 at the tip of the roller is placed on the rail material 10.

Then, the crane truck 16 is placed on the rails 15 formed in advance on the crane girder 12, and the cables are appropriately routed to complete the preparation.

After the preparation described above, the crane truck 16 is moved along the rail 15 of the crane girder 12 with respect to the lining bottom plate 5 that has been similarly suspended, and the reversible motor 17 installed at the tip of the crane girder 12 is moved. is activated, the roller 14 is rotated via the sprockets 18, 19 and the chain 20, the clay girder 12 is rotated around the upper end of the crane post 11, and the crane truck 1 is rotated.
Each member and equipment are moved via the hoist hook 21 suspended from the lining bottom plate 5.
Assembling, welding, inspecting, etc.

After the construction of the lining bottom plate 5 is completed, the scaffolding members suspended in the same manner are assembled by operating the crane dolly 16, hoist hook 21, and crane girder 12 to assemble the scaffolding 6, which is also suspended from the floating roof. As for the members, the floating roof 7 is assembled, welded, and inspected in the same manner as for the lining bottom plate 5.

Then, the bottom plate 5, the scaffolding 6, and the floating roof 7
Installation work such as assembly, welding, inspection, etc. is carried out inside the concrete frame 2 as shown in the figure, so there is no problem with the construction of the upper part.

Therefore, if the installation work of the lining side plate (not shown) is performed simultaneously with these lower part work, the efficiency of tank construction will be greatly improved.

Therefore, if the upper part of the lining side plate is installed near the rail material 10 when the installation of the lining bottom plate 5, scaffolding 6, and floating roof 7 is completed, it will be easier to attach the lining side plate in the next stage. The rail material 10 can be used as a rib material such as a spacer or stud material, and can be continued to be attached to the upper stage.
Meanwhile, the used crane girder 12 and crane post 11 are dismantled and lifted up by the reverse operation of the above-mentioned installation and setting work, and carried out of the system to be used for construction of the next tank.

After the crane post 11 and crane girder 12 are removed, the remains of the crane post 11 are welded and inspected so that they become part of the tank bottom plate, but since that part is in the center of the tank, various The work is relatively easy.

Although the above-described embodiments of the present invention are for completely underground tanks, it goes without saying that the present invention can also be applied to semi-underground tanks where the portion is excavated into the ground.

<Effects of the Invention> As described above, according to the present invention, when installing a floating roof tank, the rail material is fixed in a ring shape within the side wall of the concrete frame, a crane post is established on the bottom plate, and the upper end of the rail material is connected to the rail material. A crane girder is installed between the parts, and the crane cart on the crane girder is moved back and forth along the crane girder so as to rotate around the crane post, and the suspended parts are assembled, welded, and inspected. As a result, the crane girder covers the entire bottom area,
Therefore, it is easy to assemble and form a lining bottom plate and a floating roof, and moreover, a large diameter tank bottom plate and a floating roof can be formed without any trouble using only one crane post and one crane girder.

In addition, since you only need to set the crane post and crane girder, there is no need for centering or balance adjustment like in conventional balance cranes or guide trucks, and the structure is extremely simple, making crane work much easier. Since it is simple, it is easy to set up, reset, and disassemble, and has the advantage of being easy to operate and being manufactured at low cost.

Furthermore, the rail material fixed in a ring shape to the side wall of the concrete frame has the advantage that it can be used as a reinforcing rib for the lining side wall.

Furthermore, the lining bottom plate and floating roof can be installed using a crane, and since the crane only forms an inverted L-shaped frame of the crane post and crane girder, it is easy to install the lining side plate above. , which has the advantage of significantly improving tank construction efficiency.

In addition, since the crane girder is installed between the rail material installed on the side wall of the concrete frame and the crane post, there is no need to use the so-called cantilever type, and it is therefore possible to suspend quite heavy components. The structure of the crane post and crane girder can be made lightweight, and therefore the crane post can be easily hung and the crane girder can be easily installed, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a floating roof tank installation method based on the prior art, FIG. 2 is a general longitudinal sectional view of an embodiment of the present invention, and FIG. 3 is a plan view of FIG. 2.
FIG. 4 is a partially enlarged sectional view of FIG. 2. 2... Concrete frame, 3'... Side wall, 10
...Rail material, 11...Crane post, 12...
... Crane girder, 16 ... Crane trolley, 5
...Bottom plate, 7...Floating roof.

Claims (1)

[Claims] 1. When installing a floating roof tank, in an installation method in which a crane is installed inside the concrete structure and parts are assembled using the crane, a ring-shaped rail material is fixed to the inner surface of the side wall of the structure, and a crane is installed in the center of the bottom plate. A post is provided, a crane girder is provided between the crane post and the above-mentioned rail material, and the crane girder is rotated around the crane post, and members are assembled using a crane dolly installed on the crane girder to construct a bottom plate, floating roof, etc. A floating roof tank installation method characterized by performing the following steps.