JPH04154582A - Insulation waterproof device of floating roof for floating roof type tank - Google Patents

Abstract

PURPOSE:To make it possible to use only one type of corner block even when the angles of sharp corners of triangle shaped insulation materials of edge insulation material blocks are different by a method wherein a sharp corner of a triangle shaped insulation material for each edge insulation material block is cut off at a necessary part, in response to the angle, and a cut end with a specified length is formed. CONSTITUTION:For edge insulation material blocks 3a which are located in the vicinity of the peripheral edge of a circular deck 1, a part of the respective constituent insulation materials 2 is cut off in order so that it matches a part of the circumference of the deck 1, and the angle of a sharp corner 4 of the triangle shaped insulation material 2a differs depending on the location on the circumference of the deck 1. Among all insulation material blocks 3 on the deck 1 for a circular floating roof 10, the sharp corner 4 of the triangle shaped insulation material 2a for each edge insulation material block 3a is cut off at a necessary part, in response to the angle theta, and a cut end 8 with a specified length is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floating roof insulation and waterproofing device for a floating roof tank.

Conventional technology Conventionally, in order to insulate and waterproof the circular floating roof of a floating roof tank, rectangular insulating materials of a predetermined size are laid on the top of the steel deck of the floating roof, and the top of this insulating material is For example, a waterproof sheet made of a high-strength polyvinyl chloride-coated steel plate (hereinafter referred to as a PVC steel plate) was covered.

However, steel decks for floating roofs are made by sequentially welding steel plates of the required size, and in order to check for aging of the welds due to rust over time,
All welds had to be removed and insulation laid down.

For this reason, the required number of insulation materials were put together to form a large number of insulation blocks, and the blocks were laid out parallel to each other. An edge insulation material block located near the periphery of the circular deck and an intermediate insulation material block located inside the steel plate welded portion and having a rectangular shape when viewed from above were formed.

A top surface waterproof sheet made of a PVC steel plate is placed on the top surface of each insulation block, and a band-shaped side waterproof sheet made of a PVC steel plate is placed on the side peripheral surface of the block. In order to increase efficiency, the corners of the insulation blocks were covered with corner members made of PVC steel plates.

Problems to be Solved by the Invention However, among the insulation blocks on the circular deck of the floating roof, particularly in the edge insulation blocks located near the periphery of the circular deck, part or all of the constituent insulation material is , the triangular insulating material is cut sequentially to approximately match a part of the circumference of the deck, and has an acute corner at the tip, and the angle of the acute corner of the triangular insulating material is , which differs depending on the circumferential position of the deck, so in the past, corner members were manufactured and used according to each angle, but now there are so many types of corner members that it becomes very difficult to manufacture them. Not only is it cumbersome and easy to make mistakes when picking up materials and machining steel plates, it is also extremely troublesome to store and manage several types of corner members, and it takes time to align corner members on site. However, when corner members with angles that do not match are used, there is a problem in that work at the site is hindered.

The object of the present invention is to solve the problem of the above-mentioned prior art, and even if the angles of the acute corners of the triangular insulation material of the edge insulation material block are sequentially different depending on the circumferential position of the deck, only one type of insulation material can be used. It is sufficient to use the corner members of This makes it extremely easy to store and manage corner members, and it is also possible to quickly align corner members on-site, significantly reducing on-site work time, and to avoid misaligned angles. To provide a heat insulating and waterproofing device for a floating roof in a floating roof type tank, which can perform heat insulating and waterproofing of the floating roof very efficiently and reliably without having to worry about using corner members.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a large number of insulation blocks in which a required number of rectangular insulation materials having a predetermined size are grouped together on the upper surface of a deck of a circular floating roof. The blocks are laid out parallel to each other to form an edge insulation block located near the periphery of the circular deck, and an intermediate insulation block that is rectangular when viewed from the plane. , Part or all of the constituent insulation material of each edge insulation material block is a triangular insulation material that is sequentially cut to approximately match a part of the circumference of the deck and has an acute corner at the tip. In a floating roof type tank in which a triangle-shaped insulation material of each edge insulation material block is formed, the acute corner part of the triangular insulation material of each edge insulation material block is cut off at a required part according to the angle, and a cut end of a predetermined length is obtained. A waterproof sheet for the top surface made of a synthetic resin-coated metal plate is placed on the top surface of each edge insulation material block, leaving only the periphery of the top surface of the block. , made of a synthetic resin-coated metal plate, with a cross section approximately A strip-shaped side tarpaulin sheet is placed over the cut ends of the triangular insulation of the block, except for the cut ends of the triangular insulation of the edge insulation block.
A corner member made of a waterproof sheet made of a synthetic resin-coated metal plate is covered, and the corner member is provided along the upper horizontal part of the sector-shaped part and the arcuate edge of this part when viewed from a plane having the required angle. It is composed of a vertical part and a lower horizontal part that comes into contact with the top surface of the deck, and has an approximately one-shaped cross section, and the cut end of the triangular insulation material of the edge insulation material block is the opening of the corner member. When viewed from the plane of the corner member, a waterproof sheet for the upper surface is housed so as to span both ends of the circular arc-shaped vertical portion, and covers the upper surface of the edge insulation material block. The upper horizontal parts of the covering band-shaped side waterproof sheets are placed abutting against each other with a predetermined gap between them, and a stretchable connecting sheet is passed across this gap to connect the connecting sheets. The edge is joined to the side edge of the top waterproof sheet and the connecting side edge of the side waterproof sheet, and the connecting side edge of the strip-shaped side waterproof sheet is attached to both connecting side ends of the corner member. The parts are arranged abuttingly with a predetermined gap between them, and a stretchable band-shaped connecting sheet is passed across this gap so that the edges of the connecting sheet meet the connecting end of the corner member and the band-shaped side surface. The gist of this invention is an insulation and waterproofing device for a floating roof in a floating roof tank, which is characterized by being joined to the connecting end of a waterproof sheet.

According to the above-mentioned insulation and waterproofing device for a floating roof, the acute corner portion of the triangular insulation material of each edge insulation material block is cut off at a required portion according to the angle, regardless of the circumferential position of the deck. Since a cut end of a predetermined length is formed, it is only necessary to cover the cut end of this triangular insulation material with one type of corner member, and depending on the circumferential position of the deck, the edge insulation material block Even if the angle of the acute corner part of the triangular insulation material changes sequentially, these steps include cutting the top waterproof sheet, cutting the connecting end of the band-shaped side waterproof sheet, and cutting the acute corner member. Both of these steps, such as cutting off the lower horizontal portion, can be done by cutting the plate material.

Therefore, only one type of corner member can be used to accommodate various angles of the sharp corners of the edge insulation block, making it very easy to manufacture the corner member and reducing material pick-up. Since there is no possibility of mistakes occurring in the drawing or processing of the steel plate, and only one type of corner member is used, storage and management of the corner members is extremely simple.

In addition, corner members can be quickly aligned on-site, significantly reducing on-site work time, and there is no need to worry about using corner members at mismatched angles, which greatly improves insulation and waterproofing of floating roofs. This can be done efficiently and reliably.

Example Next, embodiments of the present invention will be described based on the drawings.

First, in Fig. 3, the steel deck (1) of the floating roof (10) of a floating roof type crude oil storage tank is made of thin steel plates of a required size and, for example, a thickness of 4.5 cm, which are successively joined by welding. In order to insulate and waterproof this deck (1), it is necessary to remove the welded parts (A) due to rust over time.
) In order to check for aging, all welded parts (^) are removed and insulation material (2) is laid out, followed by waterproofing using a waterproof sheet made of PVC steel plate.

The heat insulating material (2) is rectangular, made of, for example, expanded polystyrene resin, and has a predetermined size of 2 m in length and 1 m in width. These insulating materials (2) are laid out in the required number to form a large number of insulating material blocks (3), and the blocks (3) are arranged in parallel to each other on each deck (1). An edge insulation material block (3a) located inside the welding part (A) and near the peripheral edge of the circular deck (1), and a square block located inside each welding part (A) of the deck (1) and having a rectangular shape when viewed from the plane. middle insulation block (
3b) is formed.

As shown in FIGS. 1 and 5, in the edge insulation block (3a) located near the periphery of the circular deck (1), a part of the constituent insulation material (2) is ) Triangular-shaped insulation material (
2a) is formed, and as shown in Fig. 3, the angle of the acute corner part (4) of the triangular heat insulating material (2a) varies depending on the circumferential position of the deck (1). There is.

Of all the insulation blocks (3) on the deck <1) of the circular floating roof (lO), each edge insulation block (3a
) of the triangular insulation material (2a) at the acute corner (4
) is cut off at a required portion according to the angle (θ) to form a cut end portion (8) of a predetermined length.

Here, FIG. 1 shows the case where the angle (θ) of the acute corner part (4) of this triangular heat insulating material (2a) is 30@, and FIGS. 11 and 12 show the case where this triangular shape insulation material (
2a) shows the case where the angle (θ) of the acute corner portion (4) is 606″ and 80″, respectively.

Each edge insulation block (3a) is covered with a waterproof sheet made of PVC steel plate in the following manner.

First, as shown in FIGS. 1, 5, and 6, a top waterproof sheet (5) made of a PVC steel plate is placed on the top surface of the edge insulation material block (3a) around the top surface of the block (3a). The block (3a) is covered with an upper horizontal part (8a) made of a PVC steel plate and covers the upper surface peripheral part of the block (3a) on the side peripheral surface of the block (3a).
A strip-shaped waterproof sheet (6) for the side surface of the cross-sectional road 1 is composed of a vertical part (6b) that covers the side surface of the block and a lower horizontal part (6c) that contacts the top surface of the deck (1). (3
A PVC steel plate is placed over the cut end (8) of the triangular heat insulator (2a) in a), except for the cut end (8) of the edge heat insulator block (3a). It is covered with an acute angle corner member (7). In addition, at the other two right-angled corners of the edge insulation block (3a),
It is covered with a right angle corner member (■7).

Note that another obtuse corner of the edge insulation material block (3a) has a band-shaped side surface having cutouts (18) and (19) in the upper horizontal part (6a) and the lower horizontal part (6c), respectively. It is covered with waterproof sheet 1-(6).

Here, as shown in FIGS. 1 and 2, the acute angle corner member (7) has an upper horizontal portion (7a) that is fan-shaped when viewed from a plane with an angle of 135°, for example, and an arcuate edge thereof. It is composed of a vertical part (7b) provided along the deck (1) and a lower horizontal part (7c) that comes into contact with the upper surface of the deck (1), and has a generally l-shaped cross section.

The cut end (8) of the triangular insulation material (2a) of the edge insulation material block (3a) forms an acute corner member (7).
It is housed inside the opening of the corner member (7) so as to span both ends of the arc-shaped vertical part (7a) when viewed from the plane of the corner member (7).

The peripheral edge of the top waterproof sheet (5) that covers the top surface of the edge insulation material block (3a) and the upper horizontal portion (6a) of the strip-shaped side waterproof sheet (6) that covers the same side are spaced apart from each other by a predetermined distance. (9) are arranged in an abutting manner, and at both connecting side ends (7A) (7A) of the acute angle corner member (7),
One connecting side end (8A) (8A) of the two strip-shaped side waterproof sheets (6) (6) is connected to a predetermined gap (9).
) are arranged side by side with gaps in between.

The lower horizontal part (7c) of this corner member for acute angles (7) that comes into contact with the upper surface of the deck (1) is the outer edge of the lower horizontal part (Be) (6c) of the waterproof sheets for both strip-shaped side surfaces (8) and (6). It is cut on the extension line of , and the part outside this (7d) (
7d) has been cut off.

As shown in Figures 11 and 12, if the angle (θ) of the acute corner part (4) of the triangular insulation material (2a) of the edge insulation material block (3a) is different, it will be cut off accordingly. The length of the cut end (8) of the triangular heat insulating material (2a) is, for example, 185 cm.
As such, it is assumed to be constant.

In addition, the acute corner part (4) of the triangular heat insulating material (2a)
) angle (θ) is 30' (see Figure 1) 60'
(see Fig. 11) and 80'' (see Fig. 12), the sizes of the cut-off portions (7d) (7d) of the lower horizontal portion (7c) of the corner member (7) also differ.

Although detailed illustrations are omitted, the triangular heat insulating material (
If the angle (θ) of the acute corner part (4) in 2a) differs, the two connecting ends (7A) of the acute corner member (7) are arranged in abutment manner accordingly. 2
The connecting side ends of the two strip-shaped side waterproof sheets (8) and (6) (
The lengths of 6A) (8A) also differ.

For example, the acute corner part (4) of the triangular heat insulating material (2a)
) is 60° (see Figure 11), the connecting end (7A) of the acute corner member (7),
The length of the connecting side end (6A) of the strip-shaped side waterproof sheet (6) is equal to V when viewed from the plane, but even if the angle (θ) is smaller than this (in the case of Fig. 1) , or even if it becomes larger (in the case of FIG. 12), the length of the connection side end (6A) on the side of the strip-shaped side waterproof sheet (6) becomes longer.

Therefore, in such a case, at the connecting side ends (6A) (6A) of the two strip-shaped side waterproof sheets (6) (6), the tips of these upper horizontal parts (8a) (6a) may overlap each other, but in that case, the tips of the overlapping upper horizontal parts (6a) and (8a) may be cut appropriately so that a gap (9) of the required width is left between them; Even strip-shaped side waterproof sheet (
6) Cutting the connecting end or cutting the corner member for an acute angle (
This can be solved by cutting off the lower horizontal portion (7c) of 7).

In addition, as shown in FIGS. 5 and 6, the right angle corner member (17) has a rectangular upper horizontal portion (17a) when viewed from above.
), a vertical part (17b) that is abbreviated in shape when viewed from above, and a lower horizontal part (17c) that comes into contact with the upper surface of the deck (1), and has a substantially uniform cross-section.

At both connecting side ends of this right angle corner member (17), 2
The other connecting end portions (6B) (8B) of the two band-shaped side waterproof sheets (8) (8) are arranged abuttingly with a predetermined gap (9) between them.

Around the edge insulation material block (8a), the lower horizontal part (8C) of the strip-shaped side waterproof sheet (6), the lower horizontal part (7c) of the corner member for acute angles (7), and the corner for right angles. The lower horizontal part (17c) of the member (17) is connected to the deck (17c) by the required number of stud pins (I4).
1) is fixed.

As shown in FIG. 7, the top well waterproof sheet (5) and the side waterproof sheet (6), or the side waterproof sheet (6) and the corner member (7) for an acute angle or one corner, are arranged.
) (17), a stretchable belt-shaped connecting sheet (11) is passed across the gap (9) between the
Both side edges of the connecting sheet (11) are connected to the gap (9), the top waterproof sheet on both sides (5) the side waterproof sheet) (8), or the corner member for acute angles or right angles (7) (17)
are connected to each other.

Note that the acute corner part (4) of the triangular heat insulating material (2a)
) is small, for example, 30°, a triangular void is formed on the extension of the lower horizontal portion (7c) of the corner member (7), as shown in the figure. Therefore, it is sufficient to cover this gap with a triangular connecting sheet (lla) of the same shape but slightly larger size.

Finally, as shown in Figures 4 and 8, a non-combustible belt-shaped covering sheet (12) is placed over the stretchable belt-shaped connecting sheet 1- (11), and both side edges of the sheet are covered with each other. They are joined by a sealing adhesive (13).

In addition, the triangular connecting sheet (lla) is also covered with a nonflammable belt-shaped covering sheet (12a) of the same shape (No. 8).
(see figure).

By the way, the above-mentioned gap (9) can allow expansion and contraction of the waterproof sheets (5) and (6) due to temperature difference, and is preferably set to, for example, 10 to 60 mm.

In addition, as the band-shaped connecting sheet (11), a soft polyvinyl chloride thermoplastic synthetic resin sheet, or a non-vulcanized rubber sheet is used. Preferably, sheets are used. (11) has a width of 100 to 20 mm, for example.
01% thickness is about 1.0-2.0-1.

Silicone-based, urethane-based, and rubber-based adhesives can be used as adhesives for joining the waterproof sheets (5) (6) and corner members (7) to the band-shaped connecting sheet (11), but especially waterproof When the joint surfaces of the sheets (5), (6), the corner members (7), and the connecting sheet (11) are both made of vinyl chloride resin, tetrahydrofuran alone, tetrahydrofuran and vinyl chloride resin, or vinyl chloride and vinyl acetate are used. It is desirable to use a solution type adhesive in which a resin such as a copolymer is dissolved.

Although not shown, a waterproof sheet (5) for the upper surface made of PVC steel plate is placed over the upper surface of the intermediate insulation material block (3b), which is rectangular when viewed from above, leaving only the peripheral edge of the block (3b). At the same time, the same insulation block (3b)
Right angle corner members (17) similar to those described above are arranged at each of the four right angle corners.

The side circumferential surface of the intermediate insulation block (3b) excluding the corner portions is covered with the strip-shaped side waterproof sheet (6) of the cross section road 1, as in the case above, and the top surface waterproof sheet is also covered. (5
), the strip-shaped side waterproof sheet (8), and the right-angle corner member (17), each having a stretchable strip-shaped connecting sheet (11) was passed and joined so as to straddle the respective gaps (9). After that, a nonflammable belt-shaped covering sheet (12) is placed over the stretchable belt-shaped connecting sheet (ll).

As shown in FIG. 9, for example, an edge insulation block (3a
) and the intermediate insulation block (3b) are provided with a predetermined gap (9), and each welded portion (A) of the deck (1) is positioned within this gap (9). There is. A stretchable and transparent belt-shaped connecting sheet (11) is passed across this gap (9), and both side edges of the connecting sheet (11) are covered with waterproof sheets for the side surfaces on both sides of the gap (9). (6)
(8) are respectively joined to the lower horizontal portion (Be) (Be). In addition, this elastic band-shaped connecting sheet (11)
A noncombustible belt-shaped covering sheet (12) is placed on top of the
Both side edges of this are joined with a sealing adhesive (13).

Since the band-shaped connecting seam (11) is transparent, after manufacturing the steel deck (1) of the floating roof (10), when inspecting the aging of the welded part (A) due to rust over time, it is necessary to check that it is non-flammable. It is fine if you peel off the band-shaped covering sheet (12).

In addition, as shown in Figure 10, the peripheral edge of the deck (1) of the floating roof (lO) of the crude oil storage tank and the side wall (20) of the pontoon (floating body) (15) are each made of a PVC steel plate. Piece (16) (1B) is a stud pin (■
4) is fixed.

A predetermined gap (9) is provided between the insulation block (3) and the side wall (20) of the pontoon (15), and each welded portion of the deck (1) is provided within this gap (9). (A
) is located. A stretchable and transparent strip-shaped connecting sheet (11) is passed across the gap (9), and both side edges of the connecting sheet (11) are stretched across the gap (9).
) Lower horizontal part (6c) of both side waterproof sheets (6)
and a joint piece (16), respectively. Moreover, a non-combustible strip-shaped covering sheet (12) with an abbreviated cross section and a vertical part and a horizontal part is placed on top of this transparent connecting sheet (11), and the vertical part of this covers the side wall (15) of the pontoon (15). 20) Transparent connecting sheet (11) along the inner surface
The horizontal part is joined to the lower horizontal part (6c) of the side waterproof sheet (8) by an adhesive (13) that also serves as a seal.

When inspecting the aging of the welded part (A) due to rust over time, in the same way as in the above case, a non-combustible band-shaped covering sheet (12
) is -1 better if you peel it off.

At the required height of the side (g<20) of the pontoon (I5), a coating is provided to cover the upper end of each of a joint piece (16), a transparent connecting seam (11), and a noncombustible strip-shaped covering sheet (12). A member (21) is attached, as well as a roadside cross-shaped drainage cover (22) above it.

According to the above embodiment, the elastic band-shaped connecting sheet (
11) does not appear on the surface of the deck (1), so the entire floating roof (10) has a structure that complies with noncombustibility standards.

In addition, in the above example, the upper surface waterproof sheet (5)
, strip-shaped side waterproof sheet (8), corner member for acute angles (
7) and the right angle corner member (17), or the non-combustible strip-shaped covering sheet (12), are each made of a steel plate coated with polyvinyl chloride on both sides, but these are also made of a steel sheet coated with polyvinyl chloride on both sides. It may also be made of synthetic resin-coated steel plate.

Effects of the Invention As described above, the present invention has a structure in which a required number of rectangular insulating materials having a predetermined size are grouped together to form a large number of insulating material blocks on the upper surface of a deck of a circular floating roof, and the blocks are mutually arranged. Edge insulation blocks are laid out parallel to each other and are located near the periphery of the circular deck;
A middle section insulation material block is formed which is rectangular when viewed from the plane, and a part or all of the constituent insulation material of each edge insulation material block is sequentially cut to approximately correspond to a part of the circumference of the deck. In a floating roof tank in which triangular insulation is formed with an acute corner at the tip, the acute corner of the triangular insulation of each edge insulation block is at that angle. Accordingly, a cut end portion of a predetermined length is formed by cutting off a predetermined length, and a waterproof sheet for the top surface made of a synthetic resin-coated metal plate is placed on the top surface of each edge insulation material block around the top surface of the block. At the same time, on the side circumferential surface of the block, there is an upper horizontal portion that is made of a synthetic resin-coated metal plate and covers the upper peripheral edge of the block, a vertical portion that covers the side surface of the block, and an upper portion that touches the upper surface of the deck. A strip-shaped side waterproof sheet with a cross section of approximately t, which is made up of the lower horizontal part in contact with the block, is placed over the triangular insulating material of the same block except for the cut ends, and the triangular insulating material of the edge insulating material block A corner member made of a waterproof sheet made of a synthetic resin-coated metal plate is placed over the cut end of the corner member. It consists of a vertical part provided along the edge and a lower horizontal part that comes into contact with the top surface of the deck, and has an approximately 1-shaped cross section. A periphery of a top waterproof sheet that covers the top surface of the edge insulation block, the end of which is housed inside the opening of the corner member so as to span both ends of the arc-shaped vertical portion when viewed from the plane of the corner member. and the upper horizontal part of the strip-shaped side waterproof sheet covering the same side surface are arranged abuttingly with a predetermined gap between them, and a stretchable strip-shaped connecting sheet is passed across this gap. The edge of the connecting sheet is joined to the side edge of the top waterproof sheet and the connecting side edge of the side waterproof sheet, and the strip-shaped side waterproof sheet is attached to both connecting side ends of the corner member. The connecting side ends of the sheets are arranged abuttingly with a predetermined gap between them, and a stretchable belt-shaped connecting sheet is passed across this gap so that the edge of the connecting sheet meets the connecting side edge of the corner member. and the connecting side end of the strip-shaped side waterproof sheet, so that the acute angle of the triangular insulation material of each edge insulation material block is Since the corner portion is cut off at a required portion according to its angle to form a cut end portion of a predetermined length, one type of corner member can be placed over the cut end portion of the triangular insulation material. Depending on the circumferential position of the deck, the angle of the acute corner of the triangular insulation of the edge insulation block may vary depending on the circumferential position of the deck. Both the cutting of the connecting end and the cutting off of the lower horizontal part of the corner member for acute angles can be done by cutting the plate material.

Therefore, only one type of corner member can be used to accommodate various angles of the sharp corners of the edge insulation block, making it very easy to manufacture the corner member and reducing material pick-up. Since there is no possibility of mistakes occurring in the drawing or processing of the steel plate, and only one type of corner member is used, storage and management of the corner members is extremely simple.

In addition, corner members can be quickly aligned on-site, significantly reducing on-site work time, and there is no need to worry about using corner members at mismatched angles, which greatly improves insulation and waterproofing of floating roofs. This has the effect that it can be carried out efficiently and reliably.

[Brief explanation of the drawing]

Fig. 1 is an enlarged plan view of the main part of the floating roof of a floating roof tank according to the first embodiment of the present invention, Fig. 2 is a perspective view of only the corner members, and Fig. 3 is a schematic part of the floating roof of the floating roof tank. FIG. 4 is a plan view, and FIG. 2 is an enlarged sectional view taken along line 1--2 in FIG. Figures 5 to 8 are partially enlarged perspective views showing the steps of sequentially insulating and waterproofing a floating roof according to the present invention.
Fig. 5 is a schematic exploded perspective view showing the deck of the floating roof and the heat insulating material and waterproof sheet placed on it, and Fig. 6 shows the state where the heat insulating material and the waterproof sheet are placed on the deck of the floating roof. Fig. 7 is a schematic perspective view of the connecting side edges of the waterproof sheets connected together with a band-like connecting sheet on the deck of the same floating roof, and Fig. 8 is a schematic perspective view of the waterproof sheet on the deck of the same floating roof. FIG. 2 is a schematic perspective view of a state in which a nonflammable belt-shaped covering sheet is further placed over a belt-shaped connecting sheet that connects connecting side edges of the apparatus. FIG. 9 is an enlarged sectional view taken along line XX in FIG. 3. FIG. 10 is an enlarged sectional view taken along line XX in FIG. 3. FIG. 11 is an enlarged plan view of a main part of a floating roof according to a second embodiment of the present invention, and FIG. 12 is an enlarged plan view of a main part of a floating roof according to a third embodiment of the invention. <1)...Floating roof deck of crude oil storage tank, (A
)...Welded part, (2)...Rectangular insulation material, (3)...
... Insulation block, (3a) ... Edge insulation block, (4) ... Corner section, (2a) ... Triangular insulation material, (3b) ... Square middle insulation material Material block, (5)...Top waterproof sheet, (6)...Strip-shaped side waterproof sheet, (6a)...Top horizontal part, (6b
)-...Vertical part, (6c)...Lower horizontal part, (7)-
... Corner member, (θ) ... Corner, (7a) ... Fan-shaped upper horizontal part, (7b) ... Arc-shaped vertical part when viewed from the plane, (7c) ... Lower horizontal part ζ(8)...Cut end of triangular heat insulating material, (9)...Gap, (10)...
...Floating roof, (11)...Stretchable belt-shaped connecting sheet. Above Figure 6

Claims (1)

[Claims] On the upper surface of the deck (1) of the circular floating roof, a required number of rectangular insulating materials (2) having a predetermined size are put together to form a large number of insulating material blocks (3).
3) An edge insulation material block (3a) that is arranged parallel to each other and located near the periphery of the circular deck (1), and an intermediate insulation material block (3b) that is rectangular when viewed from the plane. is formed and each edge insulation block (3a
) Part or all of the constituent insulation material (2) of the deck (
1) A floating roof type tank in which a triangular heat insulating material (2a) is formed by cutting it sequentially so as to substantially match a part of the circumference of 1) and having an acute corner part (4) at the tip. In this step, the acute corner part (4) of the triangular insulating material (2a) of each edge insulating material block (3a) is cut off at a required portion according to the angle to form a cut end of a predetermined length ( 8) is formed, and the upper surface waterproof sheet (5) made of a synthetic resin-coated metal plate is placed on the upper surface of each edge insulation material block (3a), leaving the upper surface periphery of the block (3a). At the same time, a block (3a) made of a synthetic resin-coated metal plate is attached to the side peripheral surface of the block (3a).
3a) an upper horizontal part (6a) that covers the upper surface periphery, a vertical part (6b) that covers the side surface of the block (3a), and a deck (
1) A strip-shaped side waterproof sheet (6) with a cross section of approximately ■, which is composed of a lower horizontal part (6c) that contacts the upper surface, is cut into the triangular heat insulating material (2a) of the same block (3a). Covered except for the ends (8) and edge insulation blocks (3a)
A corner member (7) made of a waterproof sheet made of a synthetic resin-coated metal plate is attached to the cut end (8) of the triangular heat insulating material (2a).
) is covered, and the corner member (7) has the required angle (
θ), a sector-shaped upper horizontal part (7a) when viewed from a plane, and a vertical part (7b) provided along the arcuate edge of the sector-shaped upper horizontal part (7a).
and the lower horizontal part (7c) that comes into contact with the top surface of the deck (1).
The cut end (8) of the triangular insulating material (2a) of the edge insulating material block (3a) is connected to the opening of the corner member (7). A top waterproof sheet (5) is placed inside the corner member (7) so as to extend over both ends of the arc-shaped vertical portion (7a) when viewed from the plane of the corner member (7), and covers the top surface of the edge insulation material block (3a). )
A belt-shaped side waterproof sheet (6
) are arranged abutting against each other with a predetermined gap (9) between them, and a stretchable strip-shaped connecting sheet (11) is passed across the gap (9). The edge of the connecting sheet (11) is the top waterproof sheet (5).
and the connection side edge of the side surface waterproof sheet (6), and the strip-shaped side surface waterproof sheet (6) is connected to both connection side ends of the corner member (7). The side ends are arranged abutting with a predetermined gap (9), and a stretchable band-shaped connecting sheet (11) is passed across this gap (9), and the connecting sheet (11) is Insulating and waterproofing of a floating roof in a floating roof type tank, characterized in that the edge is joined to the connecting side end of the corner member (7) and the connecting side end of the strip-shaped side waterproof sheet (6) Device.