JP2526084Y2 - Refrigeration tank bottom unit for cryogenic 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 cold insulator layer structure at the bottom of a low-temperature tank, and more particularly to a cold insulator layer structure at a bottom of a low-temperature tank which can shorten a construction period.

[0002]

2. Description of the Related Art Generally, a low-temperature tank stores a low-temperature liquefied gas such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas). As shown in FIG. It is mainly composed of an outer tank 14 surrounding the inner tank 13.

A heat insulating material layer 15 is provided at the bottom between the inner and outer tanks 13 and 14 to form a heat insulating structure. The heat insulating material not only lowers the thermal conductivity but also has a strength against the liquid pressure. Requirements are also a major factor. The bottom heat insulating material layer structure includes a foam glass laying method, a granular pearlite laying method using a cylindrical block, or the like, and a plurality of layers (5 in the illustrated example) of a heat insulating material block 16 such as foam glass on the bottom plate 14a of the outer tank 14. Layers).

[0004]

However, in the above-described bottom cold insulator layer structure, a cold insulator block is laid one by one on the bottom plate of the outer tank, and a capping material as a cushioning material is further laid thereon. Since the heat insulating material blocks are laminated and formed through the intermediary, a considerable number of days are required until the entire structure is formed, and the construction period becomes long.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a cold insulation material layer structure at the bottom of a low-temperature tank, which can shorten the construction period. It is in.

[0006]

According to the present invention, in order to achieve the above-mentioned object, the bottom plate of the inner tank which is laid on the bottom plate of the outer tank and stores the low-temperature liquid on the upper surface is closely mounted. And a layer around the bottom cold insulator layer for
In the bottom cold insulator layer structure of a cryogenic tank with a shaved concrete ring, the bottom cold insulator layer can be transported
Form a pallet container divided by a cold insulation plate so as to be vertically divided into a plurality of sizes , and each upper portion is opened and the side portions are interdigitated with each other, and formed in the pallet container. A plurality of cold insulator blocks such as foam glass are laminated in advance in a factory or the like to form a cool pallet,
These cool pallets are placed on the bottom plate of the outer tank,
The sides of the ret are arranged so as to mesh with each other to form a bottom insulation layer and beside the concrete ring.
The contacting portion is formed in a fan shape .

[0007]

The refrigeration pallet is formed by stacking a plurality of refrigeration blocks, such as foam glass, in a pallet container formed so as to vertically divide the bottom refrigeration layer into a plurality of sections. If these cool pallets are arranged on the bottom plate so that the sides of the adjacent cool pallets mesh with each other,
A bottom cold insulator layer will be laid. For this reason, on the bottom plate of the outer tank, lay a number of blocks of cooling material one by one,
In addition, since it is not necessary to stack a large number of cold insulator blocks on this, the number of installation steps on site (in the tank) is greatly reduced, and the construction period of the bottom cold insulator layer can be shortened. It becomes possible.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a cylindrical low-temperature tank for storing LNG (liquefied natural gas) and the like. This tank 1 has an inner tank 2 for storing a low-temperature liquid and an outer tank 2 for storing the low-temperature liquid. It is mainly composed of an outer tank 3 surrounding this at a predetermined interval.

The outer tank 3 is provided on a foundation 4 and the outer tank 3
A concrete ring 5 is provided on the bottom plate 3a near the side plate 3b. On the bottom plate 3 a of the outer tub 3 in the concrete ring 5, a bottom cold insulator layer 6 for blocking external heat input to the storage solution in the inner tub 2 is laid, and the lower cold insulator layer 6 is provided. The bottom portion 2a of the inner tank 2 is mounted on the upper surface portion in close contact. That is, the circumference of the cold insulator layer 6
A concrete ring 5 is provided in the surroundings.

As shown in FIGS. 1 and 2, the bottom heat insulating material layer 6 is constituted by a cold insulating pallet 7 which is divided into a plurality of vertically divided portions. This cool pallet 7
In the example shown in the figure, a plurality of cold insulator blocks 9 such as foam glass, granular perlite using a cylindrical block, etc. are laid in a pallet container 8 and a capping material (not shown) as a cushioning material is provided. And formed into a size that can be transported.

The pallet container 8 divides the bottom cold insulating material layer 6 into a plurality of substantially vertically divided parts. The pallet container 8 has an opening at the upper part and the side part is adjacent to the adjacent pallet container 8 (cooling pallet 7). It is formed of a cold insulation plate made of a veneer plate or the like so as to mesh with each other. As shown in FIG. 1 and FIG. 2, the step on the side of the pallet container 8 is formed on both the inner tank 2 side and the outer tank 3 side, The portions are engaged with each other so that the bottom cold insulator layer 6 is easily formed.
The cold insulation pallet may be in any shape as long as the side of the cold insulation pallet (the protrusion of the pallet container) is meshed with each other to form a bottom cold insulation material layer. Is formed in a fan shape adjacent to the concrete ring. For example, a portion adjacent to the concrete ring may be formed in a sector shape, and the other portions may be formed in a rectangular shape, or all may be formed in a sector shape. Further, the pallet container may be formed in two types of pallet containers 10 and 11 as shown in FIG. 3 so as to have a protrusion on one of the inner tank side and the outer tank side. Pallet containers 10 and 11 of different forms are alternately arranged to form the bottom cold insulator layer 12. Further, the bottom refrigerating material layer may be formed using pallet containers 8, 10, and 11 of all forms shown in FIGS.

Now, in order to lay the bottom cold insulator layer 6 on the bottom plate 3a of the outer tub 3, a cold pallet 7 is lifted by a crane or the like, and this is placed on the side of the cold pallet 7 adjacent to the bottom plate 3a of the outer tub 3. The parts are arranged one by one so as to mesh with each other. By performing this for all the cool pallets 7, the bottom cool insulating material layer 6 is laid.

As described above, the bottom cold insulator layer 6 is laid on the bottom plate 3a of the outer tub 3 only by arranging the cold pallet 7, so that the bottom cold insulator layer 6 can be formed with high accuracy. This significantly reduces the number of installation steps, and shortens the construction period of the bottom heat insulating material layer 6. In other words, the cool pallet 7 lays a plurality of cool material blocks 9 such as foam glass in a pallet container 8 formed so as to vertically divide the bottom cool material layer 6 into a plurality of pieces, and via a capping material. Because it is formed by lamination, it must be precisely
Can be laminated . For this reason, on-site (in tank 1)
Installation of the bottom cold insulating material layer 6 for performing on the bottom plate 3a of the outer vessel 3, the side of the cold pallets 7 adjacent a plurality of cold pallets 7 need only be disposed so as to mesh with each other, conventionally performed in Since it is not necessary to lay a large number of the heat insulating material blocks 9 on the bottom plate 3a of the outer tank 3 and to stack a large number of the heat insulating material blocks 9 thereon, the number of installation steps can be greatly reduced. Will be. Further, since the sides of the cold pallets 7 adjacent a relatively large cold pallet 7 having a large number of cold insulating material block 9 is arranged to mesh with each other, performing the laying and lamination of many small cold insulating material block 9 Since it is not necessary, the bottom cold insulating material layer 6 can be formed accurately. Further, since the sides of the cold pallets 7 are formed in different levels so as to mesh with each other and the cold insulating pallet 7 adjacent, external to the inner tank 2 from between cold pallet 7 when forming the bottom cold insulator layer 6 There is no need to worry about ingress of heat.

[0015]

[Effects of the Invention] In short, according to the present invention, the factory
So that the bottom insulation layer is divided vertically into multiple parts , and so on.
A plurality of cold insulator blocks, such as foam glass, were stacked in a pallet container formed in a transportable size to form a cold insulator pallet, and these cold insulator pallets constituted a bottom cold insulator layer. along with the attained to shorten the construction period, seminal
An excellent effect that the bottom cold insulator layer can be formed frequently is exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a main part of FIG.

FIG. 3 is a sectional view showing another embodiment of the present invention.

FIG. 4 is a schematic sectional view showing a conventional example.

[Explanation of symbols]

 2 inner tank 2a bottom plate 3 outer tank 3a bottom plate 6 bottom cold insulator layer 7 cold pallet 8 pallet container 9 cold insulator block

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hideki Kobayashi Inside Toyosu Sogo Office, 3-2-1-16 Toyosu, Koto-ku, Tokyo (56) References JP 61-167799 (JP, A) Actual opening Sho-59-59600 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A bottom cold insulator layer for laying on a bottom plate of an outer tub and for tightly installing a bottom plate of an inner tub for storing a low-temperature liquid on an upper surface portion, and a periphery of the bottom cold insulator layer. Setting
In the bottom cold insulator layer structure of a cryogenic tank with a shaved concrete ring, the bottom cold insulator layer can be transported
Form a pallet container divided by a cold insulation plate so as to be vertically divided into a plurality of sizes , and each upper portion is opened and the side portions are interdigitated with each other, and formed in the pallet container. A plurality of cold insulator blocks such as foam glass are laminated in advance in a factory or the like to form a cool pallet,
Place these cool pallets on the bottom plate of the outer tank
The cold pallets are arranged so that the sides thereof mesh with each other to form a bottom cold insulator layer, and the concrete ring
Cold section adjacent to the, characterized in that formed on the fan
Insulation layer structure at the bottom of the tank .