JPH0413504Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cooling device for the upper part of the tank side wall of an underground low temperature storage tank, particularly the seal plate portion inside the side body plate.

[Conventional technology]

Figures 5 to 8 show examples of the structure of the upper part of the tank side wall 1 in a general underground low temperature storage tank, in which a membrane 3 provided inside the tank side wall 1 via a cold insulation material 2 is extended to the upper surface of the side wall 1. Membrane 3
A seal plate 5 is welded to airtightly connect the end portion of the side body plate 4 to the side body plate 4. Furthermore, corrugations 6 and 7 are provided at required intervals in the circumferential direction between the membrane 3 and the seal plate 5. Reference numeral 8 indicates a hanging deck that is suspended and supported from a roof (not shown).

In the above structure, conventionally, in order to keep cool between the upper end of the tank side wall 1 and the outer circumference of the hanging deck 8, a futon-like glass wool 9 which is stuffed with glass wool in a bag has been used.
is tied and fixed to the hanging deck 8 with wire or the like.

[Problem that the invention attempts to solve]

However, in the above-mentioned conventional system, since the blanket-like glass wool 9 is simply placed on the upper end of the tank side wall 1 for cold insulation, as shown in FIG. At the rising portions of the corrugations 6 and 7, a gap S tends to occur between the futon-like glass wool 9, the membrane 3, and the seal plate 5, and cold air escapes to the outside from there, reducing the cold insulation effect and causing the side body plate 4 There was a problem with frost adhering to the surface. Furthermore, even if the stored liquid causes sloshing due to an earthquake, etc., the stored liquid will pass through the gap S to the seal plate 5.
There was a problem in that the cooling effect was significantly reduced due to the direct flow upward.

The present invention was developed by focusing on the above-mentioned conventional problems, and improves safety by blocking the cold path from the seal plate part, preventing frost formation on the side body plate, and improving the cold insulation effect of the storage tank. The purpose is to achieve this goal.

[Means for solving problems]

The present invention is an attempt to solve the above-mentioned technical problem.The connection part between the membrane and the seal plate at the upper end of the tank side wall of an underground low-temperature storage tank is formed in advance with urethane foam to match the shape of the corrugation. A molded product of urethane foamate is arranged on the outer periphery of the piece, the upper surface of the membrane and the seal plate, and fixed with airtight adhesive, and then urethane foamate is sprayed onto the upper surface of the molded product to form a sprayed layer. The outer peripheral cold insulating material formed to match the upper surface of the airtight cold insulating layer is arranged so as to be integrated with the cold insulating material on the hanging deck, and the upper end of the tank side wall and the outer periphery of the hanging deck are formed. This relates to a cooling device for an upper side wall of an underground low temperature storage tank, characterized in that the space between the storage tank and the storage tank is closed.

[Effect]

Therefore, in the present invention, the connecting portion between the membrane and the seal plate is airtightly covered with an airtight cold insulation layer.
Further, an outer circumferential cold insulating material formed to match the top surface of the airtight cold insulating layer is disposed so as to be integrated with the cold insulating material on the hanging deck to reliably close the space between the upper end of the tank side wall and the outer periphery of the hanging deck. This prevents cold heat from being transmitted to the side body plate side via the seal plate.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figures 1 to 3 show an example of the present invention applied to the underground low temperature storage tank shown in Figures 5 to 8, and the same reference numerals in the figures represent the same thing. There is.

As shown in the figure, on the upper surface of the membrane 3 side at the connection part between the membrane 3 and the seal plate 5,
A cold insulating piece 10 is provided which has a concave portion that matches the corrugation 6 formed on the membrane 3 and is pre-molded with urethane foam so that the entire outside has a rectangular shape. A U-shaped member 11 of a required length surrounding the shape, a membrane 3, and a plate-shaped member 12 placed on the seal plate 5 are fixed with an adhesive or the like.
Further, a tortoise-shell wire mesh 13 or the like is placed on the members 11 and 12, and urethane foam is sprayed onto the mesh (twice) to form a sprayed layer 14 to form an airtight cold insulation layer 15.

As shown in FIG. 3, a rectangular protrusion 16 will be formed in the airtight cold insulation layer 15 at the position of the corrugation 6, so a felt cut out and shaped in advance to match the protrusion 16 will be formed. A peripheral cold insulating material 17 made of glass wool or the like is provided so as to be integrated with a cold insulating material 18 on the hanging deck 8.

As described above, on the connection part between the membrane 3 and the seal plate 5 at the upper end of the tank side wall 1, there is a cold insulating piece 10 having a shape that matches the corrugation 6, and a U-shaped member 11 that matches the outer shape of the cold insulating piece 10.
and an airtight cold insulation layer 15 in which the plate member 12 placed on the membrane 3 and the seal plate 5 is adhesively fixed, and a spray layer 14 is further formed thereon by spraying.
By configuring and airtightly covering the connecting portion, it is possible to suppress the cold heat from being transmitted to the side body plate 4 via the seal plate 5 as much as possible. By using a simple shape such as the rectangular protrusion 16 shown in FIG. 3, the outer cold insulating material 17 can be formed and fitted easily and reliably, thereby preventing a cold path of cold air due to the generation of a gap, and It is possible to prevent the stored liquid from flowing out to the side body plate 4 side when sloshing occurs.

FIG. 4 shows another example of the shape of the airtight cold insulation layer 15. By changing the thickness shape of the U-shaped member 11' so as to form a trapezoidal protrusion 16', the shape of the airtight cold insulation layer 15 is changed. This makes it easier to further improve airtightness.

In the above embodiment, an example of application to the corrugation portion of the membrane was shown, but it goes without saying that the present invention can be similarly applied to the corrugation portion of the seal plate.

[Effect of idea]

As described above, according to the cooling device for the upper side wall of an underground low-temperature storage tank of the present invention, by configuring the airtight cooling layer that airtightly covers the connection between the membrane and the seal plate at the upper part of the tank side wall, By preventing cold heat from escaping to the side body plate side through the seal plate, and improving sealing performance by creating a shape that makes it easy to match between the airtight cold insulation layer and the outer cold insulation material even when sloshing occurs. It is possible to prevent the stored liquid from flowing out to the side body plate side, thereby achieving an excellent effect of improving the safety of the low temperature storage tank.

[Brief explanation of drawings]

Fig. 1 shows an embodiment of the present invention, and is a front view of the side wall of the tank seen from inside, Fig. 2 is an enlarged view in the direction of Fig. 1, and Fig. 3 is a view in the direction of Fig. 2. , FIG. 4 is an explanatory diagram showing an example of the shape of an airtight cold insulation layer that is different from that in FIG. 3, FIG. 5 is a plan view of the tank side wall of a general low-temperature storage tank, and FIG. The perspective view, Fig. 7 is the direction arrow view of Fig. 6, Fig. 8
The figure is a directional view of FIG. 6, and FIG. 9 is an explanatory diagram showing a conventional cold storage state. 1 is a tank side wall, 3 is a membrane, 4 is a side body plate, 5 is a seal plate, 6 and 7 are corrugations, 8 is a hanging deck, 10 is a cooling piece, 11 is a U-shaped member, 12 is a plate-shaped member, 13 is a Tortoise shell wire mesh, 14
15 indicates a sprayed layer, 15 indicates an airtight cold insulation layer, and 17 indicates a peripheral cold insulation material.

Claims (1)

[Scope of utility model registration request] At the connection between the membrane and the seal plate at the upper end of the tank side wall of an underground low temperature storage tank,
A piece of urethane foamate is formed in advance to match the shape of the corrugation, and a molded product of urethane foamate is placed on the outer periphery of the piece and on the upper surface of the membrane and seal plate, and the molded product is airtightly adhesively fixed. An airtight cold insulation layer is formed by spraying urethane foamate on the top surface of the product to form a sprayed layer, and a peripheral cold insulation material formed to match the top surface of the airtight cold insulation layer is integrated with the cold insulation material on the hanging deck. 1. A cold storage device for an upper side wall of an underground low temperature storage tank, characterized in that the space between the upper end of the tank side wall and the outer periphery of the hanging deck is closed.