JP2596502B2 - Floating roof insulation construction method for floating roof tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating roof insulation method for a floating roof tank used for storing heavy oil, crude oil and the like.

[0002]

2. Description of the Related Art Generally, in a storage tank of heavy oil, crude oil, or the like having a high viscosity at room temperature, the oil storage temperature is maintained at 50 to 60 ° C. in order to ensure fluidity of storage. Therefore, it is necessary to install a heat insulating material in the tank from the viewpoint of energy saving. However, tanks for storing heavy oil, crude oil, etc. are often of the floating roof type, and most of them are of the single deck type.

FIG. 4 schematically shows the configuration of a storage tank having a single-deck floating roof. In the figure, T is a tank, B is a circular floating roof, 1 is a steel deck plate constituting the floating roof, 2 is a pontoon, and 3 is a seal member. Since the deck plate of the single deck type floating roof is made of a steel plate with a thickness of about 4.5 mm, it can be easily wavy deformed by wind pressure or walking of inspection workers. Insulation is difficult to apply, and the deck plates of existing single-deck tanks often have no insulation.

However, in a single-deck type tank, heat dissipation from the deck plate occupies about 60% of the whole, so that heat insulation is being performed on the deck plate. However, since the deck plate of the single deck tank has a structure in which steel plates of the required dimensions are connected vertically and horizontally by welding, periodic inspection of welds is easy when waterproof insulation is applied to the deck plate. Therefore, it is common practice not to apply a waterproof heat insulating material to the welded portion but to apply only a waterproof sheet material or only an anticorrosive paint.

[0005]

FIGS. 5A and 5B show a conventional method of applying a waterproof heat insulating material around a welded portion.
Are known.

In FIG. 1, reference numeral 1 denotes a deck plate, 1a
Is a steel plate constituting a deck plate, 1b is a welded portion, 4 is a heat insulating material having fire resistance and flexibility, and 5 is a waterproof sheet member. First, the heat insulating material 4 is bonded to the deck plate 1 with an adhesive having flexibility even after curing, and the waterproof sheet member 5 bonded to the surface of the heat insulating material 4 is bent and bonded to the end surface of the heat insulating material 4. Bend at a right angle and deck plate 1
By adhering another waterproof sheet member 6 to the waterproof sheet member 5 and the welded portion 1b, the welded portion can be easily inspected. However, there is a problem in that the waterproof sheet member 5 is easily peeled off from the end surface of the heat insulating material 4 as shown in FIG.

[0007]

SUMMARY OF THE INVENTION The present invention relates to a waterproof insulation construction for a deck plate constituting a floating roof of a floating roof type tank,
It is a main object of the present invention to provide a floating roof insulation construction method capable of preventing a phenomenon in which a waterproof sheet member peels off from an end surface of a heat insulating material and floats.

[0008]

According to a first aspect of the present invention, there is provided a waterproof insulation material for a deck plate constituting a floating roof of a floating roof type tank. And an auxiliary heat insulating material which is made of the same material as the heat insulating material and which is brought into contact with the end surface of the heat insulating material by bending the waterproof sheet member and which can change the end surface of the heat insulating material into a tapered shape. The gist of the present invention is to use a waterproof heat insulating material and fix the heat insulating material and the auxiliary heat insulating material after bending the waterproof sheet member and the waterproof sheet member to the deck plate using a flexible adhesive even after curing. .

According to a second aspect of the present invention, there is provided a waterproof insulation material applied to a deck plate constituting a floating roof of a floating roof type tank, wherein the waterproof sheet member has a fire-resistant and flexible heat-insulating material; Using a waterproof heat insulating material which is made of the same material as above and is bonded to an auxiliary heat insulating material which is brought into contact with an end face of the heat insulating material by bending the waterproof sheet member and which can change the end face of the heat insulating material into a tapered shape, The heat insulating material and the auxiliary heat insulating material after bending the waterproof sheet member and the waterproof sheet member are fixed to the deck plate by using an adhesive having flexibility even after curing, and the heat insulating material where the auxiliary heat insulating materials abut each other. At the corners of the material, cut and cut the corners of the waterproof sheet member and overlap them. It is summarized in that to fix overlapping bets member.

As the heat insulating material used in the present invention, for example, a fire-resistant material manufactured by foaming by adding an organic binder and a foaming agent to a fire-resistant powder such as aluminum hydroxide and calcium carbonate as a main component is used. A molded heat insulating material which has flexibility and is mainly made of closed cells and has no water absorption is exemplified.

The adhesive used in the present invention must have high adhesive strength, a heat-resistant temperature of 60 ° C. or higher, and have flexibility even after curing. One example is a modified silicone-based adhesive.

[0012]

According to the heat insulating material construction method of the first aspect,
Since the end surface of the heat insulating material has a tapered shape due to abutment of the auxiliary heat insulating material, it is possible to prevent the waterproof sheet member from rising due to peeling from the end surface of the heat insulating material. Furthermore, since a waterproof sheet is adhered to the end surface of the heat insulating material that becomes tapered by butt of the auxiliary heat insulating material before construction,
The waterproof sheet does not peel off during construction. Further, according to the heat insulating construction method according to the second invention, the waterproof structure at the corner of the heat insulating material to which the auxiliary heat insulating materials are joined can be further ensured.

[0013]

FIG. 1 shows an embodiment in which the first invention is applied to a single-deck floating roof. In the figure, 1 is a deck plate, 1a is a steel plate constituting the deck plate, 1b is a welded portion, 4 is a heat insulating material having fire resistance and possibility, 5 is a waterproof sheet member, and 4a is made of the same material as the heat insulating material. In the present embodiment, the auxiliary heat insulating material 4a is a rod-shaped member having an isosceles triangular cross section,
A waterproof heat insulating material having the same size as the end face of a and adhered to the waterproof sheet member 5 at the bottom is used.

In order to heat-insulate the deck plate 1 by using the above-mentioned waterproof heat-insulating material, first, as shown in FIG. 4a is abutted against the end surface of the heat insulating material 4, the end of the heat insulating material 4 is changed into a tapered shape, and the heat insulating material 4a, the auxiliary heat insulating material 4a, and the waterproof sheet member 5 are bonded using the adhesive 7 having flexibility even after curing. The waterproof sheet member 6 is bonded to the deck plate 1 and another waterproof sheet member 6 is welded to the waterproof sheet member 5.
b, and complete the construction.

It is advantageous to use the waterproof insulation material shown in FIG. 1 (A) obtained from factory production.
As shown in the figure, the end of the heat insulating material is cut along the two-dot chain line A at the construction site using the heat insulating material 4 with the waterproof sheet member formed to be longer than the predetermined dimension so as to cut out the auxiliary heat insulating material 4a. You may.

FIGS. 3A, 3B, and 3C show an embodiment in which the second invention of the present application is applied to a floating roof. The waterproof sheet member 5 is provided with a heat insulating material 4 and a side adjacent thereto. 2 shows a method of constructing a corner portion of a waterproof heat insulating material obtained by bonding an auxiliary heat insulating material 4a provided in each of FIGS. As the auxiliary heat insulating material 4a for forming the end of the heat insulating material 4 into a tapered shape, a material obtained by cutting the end of the heat insulating material 4 into a shape in which the ends meet at the corners of the heat insulating material is used.

As a construction method, first, as shown in FIG. 3 (A), a cut is made in the corner portion of the waterproof sheet member 5 along the two-dot chain line B, and then the flexibility is maintained even after curing. The heat insulating material 4, the auxiliary heat insulating material 4a, and the waterproof sheet member 5 are adhered to the deck plate side using an adhesive having the adhesive. At this time, as shown in FIG. After the corner portions 5 are superimposed, as shown in FIG. 3C, a substantially L-shaped waterproof sheet member 8 is superimposed on the superimposed corner portions and fixed with an adhesive. Complete the construction.

[0018]

As described above, according to the first aspect of the present invention, in the waterproof insulation work of the deck plate constituting the floating roof of the tank, the phenomenon that the waterproof sheet member peels off from the end face of the heat insulating material and rises. Can be prevented. Also, after the waterproof insulation material is installed, the edge of the waterproof insulation material is formed into a tapered shape. There is no missing part.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the first invention, in which (A) is a cross-sectional view of a waterproof heat-insulating material, and (B) is a cross-sectional view of a waterproof heat-insulating material installed on a deck plate.

FIG. 2 is a cross-sectional view showing another example of the waterproof heat insulating material.

FIG. 3 shows an embodiment of the second invention, wherein (A),
(B), (C) is a top view of the waterproof heat insulating material which shows a construction order.

FIG. 4 is a schematic configuration diagram of a tank having a single-deck floating roof.

FIG. 5 shows an example of a conventional waterproof insulation construction.
(A) is a cross-sectional view of the waterproof heat-insulating material at the time of completion of construction, and (B) is a cross-sectional view of the waterproof sheet member in a floating state.

[Explanation of symbols]

 T tank 1 deck plate 1a steel plate 1b welded part 2 pontoon 3 seal member 4 heat insulating material 5 waterproof sheet member 6 waterproof sheet member 4a auxiliary heat insulating material 7 adhesive 8 waterproof sheet member

Continuation of the front page (56) References JP-B-61-22708 (JP, B2) JP-B-61-23562 (JP, Y2) JP-B-61-27367 (JP, Y2)

Claims (2)

(57) [Claims] In the construction of a waterproof insulation material on a deck plate constituting a floating roof of a floating roof type tank, the waterproof sheet member is made of a heat insulating material having fire resistance and flexibility, and a material similar to the heat insulating material, The waterproof sheet member is bent by using a waterproof heat insulating material which is abutted against an end surface of the heat insulating material by bending the waterproof sheet member and is bonded to an auxiliary heat insulating material capable of changing the end surface of the heat insulating material into a tapered shape. And fixing the heat-insulating material, the auxiliary heat-insulating material and the waterproof sheet member to the deck plate using an adhesive having flexibility even after curing. 2. A waterproof insulation material applied to a deck plate constituting a floating roof of a floating roof type tank, wherein the waterproof sheet member is made of a heat insulating material having fire resistance and flexibility, and a material similar to the heat insulating material, The waterproof sheet member is bent by using a waterproof heat insulating material which is abutted against an end surface of the heat insulating material by bending the waterproof sheet member and is bonded to an auxiliary heat insulating material capable of changing the end surface of the heat insulating material into a tapered shape. After the heat insulating material and auxiliary heat insulating material and the waterproof sheet member are fixed to the deck plate using an adhesive having flexibility even after curing, at the corners of the heat insulating material where the auxiliary heat insulating materials abut each other, Make cuts in the corners of the waterproof sheet member and superimpose, and then attach and attach a waterproof sheet member separately made according to the shape of the corner part from above Floating roof insulation method for floating roof tanks.