JPH0469499A - Method for installing side membrane for underground tank and package box - Google Patents

Abstract

PURPOSE:To improve the working efficiency in the case of taking out side membranes for an underground tank from a package box and installing them, by hanging the package box in vertical state into the underground tank, there slinging up the side membranes from the top of the package box with a temporarily installed hanging device, and installing the side membranes. CONSTITUTION:A package box 12 allows side membranes 11 to be taken out therefrom being kept vertical in the same posture as that in the case of installation. The package box 12 is equipped with a removable top cover 13 at a portion corresponding to the top of the side membranes 11 in installed position and with a removable front cover 14 in the front. Hanging devices 17 are attached in advance to each side membrane 11. The whole packing box 12 with the side membranes 11 is slung up by a crane 20 with the top covers 13 up, hung to the bottom 23 of an underground tank 19, and kept vertical. The top covers 13 and the front cover 14 of the package box 12 are opened, and also holding members 16 are kept open, and engagingly locking parts 17a on the supper side of the hanging device 17 are hooked on hooks 26 of a hoist 25 on movable scaffolding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an attachment method for attaching a side membrane to a membrane-type underground tank in which low-temperature liquid such as LNG (liquefied natural gas) is stored, and a method for attaching a side membrane thereto. Regarding the packaging box for side membranes, the side membranes, which are long thin plates and easily deformed, can be easily handled and installed.

[Prior Art] One type of low-temperature storage tank for storing low-temperature liquids such as LNG is a membrane-type underground tank.

This membrane type underground tank consists of an outer tank made of concrete, etc. built inside a hole drilled in the ground, and a membrane made of a thin plate of 1 to 3 am, such as stainless steel, placed on the inner surface of the outer tank with an insulating material in between. are attached to create an airtight inner tank, and the upper part of these is covered with a roof to create a sealed structure.

The side membranes of such underground tanks are corrugated to cope with heat shrinkage due to storage of low-temperature liquids, and are usually formed into a long length of about 7 to 8 meters. Since it is a thin plate and requires airtightness, extreme care must be taken to prevent scratches from the material stage.

As shown in Figure 3, conventional installation of the side membrane of an underground tank involves lowering the side membrane that has been molded at the factory and transported to the site into the bottom of the underground tank 2 in its packaging box 1, and installing it inside. The membrane is lifted up by a transverse membrane carrier 3, moved to the side wall 4, and lowered onto a roller conveyor 5 so that the side membrane 6 is in a horizontal state.

The packaging box 1 is opened and a lifting jig 7 is attached to the side membrane 6 to prevent deformation during lifting.

A rack and pinion type movable scaffold 8 that is suspended from the top of the side wall 4 and can move up and down along the side wall 4 and move in the circumferential direction.
The upper end of the lifting jig 7 is connected to the wire 9 of the hoist, and the lower end of the lifting jig 7 is positioned on the roller conveyor 5 installed at an angle.

The upper end of the side membrane 6 is lifted up and at the same time the lower end is slid to gradually bring the side membrane 6 into an upright state.

After rising to a predetermined position, moving laterally, distributing the material, and attaching the side membrane 6 to the side wall 4, the lifting jig 7 is removed to complete the attachment of one side membrane 6.

Thereafter, the side membrane 6 is attached by repeating the same operation.

[Problems to be Solved by the Invention] In this method of installing the side membrane 6, the side membrane 6 in a horizontal state is lifted up and erected, and the insulation material attached to the inside of the outer tank of the underground tank 2 is or contact with the moving scaffold 8, or the roller conveyor 5.
The problem is that it is easily deformed by contact with other objects, and that it requires a large number of personnel to work carefully, resulting in poor efficiency.

The present invention has been made in view of the problems of the prior art, and includes a method for attaching a side membrane of an underground tank that allows the side membrane to be easily attached without fear of deformation, and a method for attaching the side membrane for this purpose. The purpose of this project is to provide packaging boxes for membranes.

[Means for Solving the Problems] In order to solve the problems of the above-mentioned prior art, the method for installing a side membrane of an underground tank of the present invention includes a method for installing a side membrane of an underground tank by removing it from a packaging box and installing it. , after suspending the packaging box in an upright position in an underground tank, the side membrane is lifted and taken out from the top of the packaging box using a temporary hanging device, and the materials are arranged and installed at a predetermined position. It is something.

In addition, the side membrane packaging box of the present invention has a top lid formed in a portion corresponding to the top of the packaging box in which the side membrane is placed, when the side membrane is attached, and a top cover of the side membrane inside the top of the packaging box. The present invention is characterized in that it includes a support member and a presser member for supporting the hanging tool which are connected in advance to the hanger.

[For production]

According to this underground tank side membrane installation method,
When putting a factory-packed packaging box into an underground tank, it will be hung upright, so lift the side membrane out of the packaging box in this state, arrange it in the specified position, and install it. This eliminates the need to lift the material from a horizontal position, reducing the risk of deformation. Furthermore, by distributing the material while it is lifted, there is no need to install a jig to prevent deformation, making it easy to arrange and arrange the material. Installation is possible.

In addition, according to this packaging box, a top lid is formed on the packaging box so that it can be opened and closed, and the hanging tools that are connected in advance to each side membrane can be fixed with the support member and the pressing member. At the installation site, the side membrane can be easily removed from the packaging box and installed by removing the holding member and hanging it on a hoist.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a process diagram of an embodiment of the method for attaching a side membrane to an underground tank according to the present invention, and FIG. 2 is a packing diagram of the side membrane used in the method for attaching a side membrane to an underground tank according to the present invention. It is a perspective view concerning one example of a box.

In this method of installing the side membrane of an underground tank, the packaging box 12 for packing and transporting the side membrane 11 molded at the factory is different from the conventional method.
I will explain about it.

As shown in FIG. 2, this packaging box 12 is designed so that when the side membrane 11 is taken out, it can be taken out in an upright position, similar to the attitude at the time of attachment. Note that during transportation, it is carried in a horizontal state, as in the past.

This packaging frame 12 is provided with an upper lid 13 at a portion corresponding to the upper part when the side membrane 11 is attached so that it can be removed, and a front lid 14 is also provided on the front side so that it can be removed.

The size of the packaging box 12 is such that a plurality of side membranes 11, for example, three side membranes, can be stored therein in a suspended state. It is attached to form three semicircular four parts 15a.

A presser member 16 is openably and closably connected to one end of the support member 15 with a bottle, and a semicircular recess 16a is formed on the lower surface of the support member 15 so as to face the recess 15a of the support member 15. .

Side membrane 1 stored in such a packaging box 12
1, a hanging tool 17 is attached in advance.

This hanging tool 17 is composed of a long tube that is attached to the recesses 15a of the support member 15 attached to both ends of the packaging box 12, and locking parts 17a and 17b are welded or otherwise installed on the top and bottom of both ends. It is fixed by sticking out.

The side membrane cores 1 are suspended from the lower locking portions 17b of the hanging tool 17 via wires 18, respectively.

To pack the side membrane 11 in such a packaging box 12, insert the side membrane 11 so that the hanging tool 17 is locked to the four parts 15H of the support member 5, and close the presser member 16. After pressing with the recess 16a, the top lid 13 and front lid 14 are closed.

Note that when transporting from the factory, the packaging box 12 is transported with the side membrane 11 in a horizontal state, so pads (not shown) such as hard urethane are placed on the top, bottom, left and right, and front and back of the side membrane 11. This prevents damage caused by contact with the side membranes 11 and the packaging box 12.

Next, a method of attaching the side membrane 11 placed in such a packaging box 12 will be explained with reference to FIG. 1.

■ Transport the side membrane 11 in the packaging box 12 to the construction site of the underground tank 19. In this case, the packaging box 12 may be transported in a horizontal state.

■ Move the side membrane 11 along with the packing box 12 to the crane 20.
Then, lift it up with the top lid 13 facing upward, and lower it from the opening 22 formed in the roof 21 of the underground tank 19 to the bottom 23 of the underground tank 19, leaving it in the upright state.

■ After this, the packaging box 12 is moved to the side wall 24 of the underground tank 19. This movement is performed by using a forklift, a roller conveyor, etc. (not shown), or by combining these with the crane 20.

■ Open the top cover 13 and front cover 14 of the packaging box 12, open the holding member 16, and attach the hoist of the movable scaffold installed in advance in the underground tank 19 to the locking part 17a on the upper side of the hanging tool 17. Hang the hook 26 of 25.

Then, the side membrane 11 is hoisted up by the hoist 25, the movable scaffold is moved to a predetermined mounting position, the material is arranged, and the material is mounted on the side wall 24 of the underground tank 19.

■ In this way, several cases of one side membrane 11 are completed, and from now on, the side membrane 1
1 is hung vertically from a packaging box 12, and then attached to a side wall 24.

According to this method of installing the side membrane of an underground tank, the side membrane 11 can be arranged and installed while being carried into the underground tank 19, and can be installed by raising it from a horizontal position as in the conventional method. There is less risk of damaging the side membrane 11 than in the case where the side membrane 11 is damaged, and the installation work can be carried out more efficiently.

Further, since the installation work can be carried out while the side membrane 11 is being lifted up and standing, there is no need for a lifting jig to prevent deformation, and labor can be saved in the work.

On the other hand, according to the side membrane packaging box 12, the side membrane 11 can be taken out in a vertically suspended state, and the structure of the packaging box 2 is simple, and it can also be transported horizontally as usual. It is.

In the above embodiment, the case where three side membranes were stored in the packaging box was explained, but it is possible to further increase the number of side membranes,
You may try to reduce it.

Furthermore, the hanging tool for the packaging box is not limited to a tubular shape, and may have other shapes.

Furthermore, changes may be made to each component without changing the gist of the invention.

[Effects of the Invention] As described above in detail with one embodiment, according to the method for attaching a side membrane of an underground tank of the present invention,
When a factory-packed packaging box is placed in an underground tank, it is hung upright, so the side membrane is lifted out of the packaging box in this state, and the materials are placed in a designated position and installed. be able to.

Therefore, there is no need to raise the side membrane from the horizontal state as in the past, reducing the risk of deformation, and by distributing the material while it is lifted, it is possible to attach a jig to prevent deformation. There is no need for
Materials can be easily arranged and installed, improving work efficiency.

Further, according to the side membrane packaging box of the present invention, a top lid is formed on the packaging box so that it can be opened and closed;
The hanging tools that have been connected to each side membrane in advance can be fixed using support members and holding members, so the side membranes can be easily fixed by removing the holding members at the installation site and hanging the hanging tools with a hoist. Able to remove from packaging box and install.

[Brief explanation of the drawing]

FIG. 1 is a process diagram showing an embodiment of the method for attaching a side membrane of an underground tank according to the present invention, and FIG. It is a perspective view concerning one example of a packing box of. FIG. 3 is a process diagram of a conventional side membrane attachment method. 11: Side membrane, 12: Packing box, 13: Top lid, 1
5: Support member, 16: Holding member, 17: Hanging tool, 19: Underground tank, 2o: Crane, 21: Roof, 22: Opening, 23: Bottom, 24: Side wall, 25: Hoist. Figure 2 I Figure F1

Claims (2)

[Claims] (1) When removing the side membrane of the underground tank from the packaging box and installing it, first hang the packaging box upright inside the underground tank, then lift the side membrane from the top of the packaging box using a temporary hanging device and remove it. A method for installing a side membrane of an underground tank, characterized in that the side membrane is installed by arranging the materials at a predetermined position. (2) A top lid is formed on the part of the packaging box in which the side membrane is placed that corresponds to the top when the side membrane is installed, and a suspension is attached to the top of the side membrane in advance on the inside of the top of the packaging box. A side membrane packaging box characterized by comprising a support member and a presser member for supporting ingredients.