JP2744694B2 - Expandable heat-insulating material for filling gap and method of mounting the same - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an inflatable heat insulating material for filling a gap applied to a gap of a heat insulating structure and a method of using the same.

[Prior art] Conventionally, glass wool is filled on site or soft urethane is filled in the gap between block-shaped or panel-shaped heat insulating materials, but the working efficiency is very poor, and a great deal of artificial I need it. In particular, in the case of low-temperature containment containers, the heat insulating material shrinks and the gap between the heat insulating materials expands.If the shrinkage is not sufficiently compressed with glass wool or the like at the time of initial filling, the gap remains, causing heat convection and heat insulation. Significantly inhibits the effect.

[Problems to be solved by the invention]

In a heat-insulating structure that requires high heat-insulating performance, the heat-insulating material often has a multilayer structure. In this case, it is very important to fill the sealing material so as to eliminate the gap between the heat-insulating materials.

In particular, the low-temperature tank of a liquefied gas ship employs a multilayer heat-insulating structure in which the surface is covered with a large number of blocks or panel-like heat-insulating materials as shown in the plan view of FIG. In that case, it is important to solve the following problems.

(1) From the viewpoint of preventing convection between the layers of the heat insulating material or between the cut ends, the tank material and the heat insulating material are thermally contracted by cooling by the load, so that there is a gap between the layers between the panels and between the cut ends as shown in FIG. And convection due to cold air occurs,
The heat insulation performance is significantly reduced.

(2) When the heat insulating material is multilayered and a gap is generated between the layers,
In order to cause looseness in the mounting bolts and the like and reduce the holding power of the heat insulating material, it is necessary to increase the holding power of the panel by filling a heat insulating material having an appropriate repulsive force acting as a spring between the layers.

(3) When using air-permeable heat-insulating materials such as glass wool as low-temperature heat-insulating materials, the heat-insulating structure itself is poor in airtightness, or poorly dried, absorbs moisture and causes condensation, frost formation, and icing. Cheap.

The present invention has been proposed in view of such circumstances,
It is an object of the present invention to provide an inflatable heat-insulating material for filling a gap with good workability, which effectively performs construction of a heat-insulating structure, and a method of mounting the same.

[Means for solving the problem]

For this purpose, the first invention is characterized in that a cotton-like or spongy elastic heat-insulating material such as glass wool or soft urethane foam is flatly compressed, wrapped in an airtight film and vacuum-packed.

According to a second aspect of the present invention, the flat heat-insulating material for filling described in (1) is inserted into gaps formed around a plurality of blocks or panel-shaped heat-insulating materials, and then one of the air-tight films as outer skins is inserted. It is characterized by making a hole in the part and breaking the vacuum.

[Action]

According to such a configuration, after the flat heat-insulating material for filling of the present invention is inserted deeply into a gap formed around the heat-insulating material or between the heat-insulating materials, if a part of the outer skin is broken, external air is generated. It penetrates into the filling flat heat-insulating material from the opening and immediately expands together with the elasticity of the cotton-like or spongy heat-insulating material inside, so that the gap is filled with the heat-insulating material.

As a result, by properly selecting the initial thickness and compression amount of the flat heat-insulating material for filling, it is possible to ensure the filling of the gap, absorption of the displacement due to thermal contraction, and the holding force between the heat-insulating layers due to the restoring force (repulsive force). can do.

〔Example〕

FIG. 1 is a longitudinal sectional view showing a manufacturing procedure of a filling flat heat insulating material of the first invention, and FIG. 2 is a drawing showing the filling flat heat insulating material of FIG. 1 as a heat insulating material. It is a longitudinal section explanatory view showing the point of filling in the gap.

First, the flat heat-insulating material for a seal according to the first invention will be described. As shown in FIG. 1 (1), the seal for a seal having a suitable elasticity is made of cotton or sponge such as glass wool or soft urethane foam. The heat insulating material 1 is wrapped in a bag 3 of an airtight plastic film 2, which is compressed from above and below by a press to flatten it, and the air inside the bag 3 is evacuated by a vacuum pump as shown in FIG. After the pulling, the opening 4 of the bag is welded and vacuum sealed 5 as shown in FIG.

The filling flat heat-insulating material 6 produced in this way receives the atmospheric pressure by being evacuated, and becomes a flexible plate.

Next, in order to use the flat heat-insulating material 6 for filling, first, as shown in FIG. 2 (1), it is inserted deeply along the gap 7 between the heat-insulating materials, and then as shown in FIG. 2 (2). As shown,
A break 8 is opened by breaking near the filling end.

Then, the external air enters into the inside from the breach 8, thereby being combined with the expansion force based on the elasticity of the heat insulating material 1, and as shown in FIG. And the gap 7 is filled with the heat insulating material 1 without any gap.

〔The invention's effect〕

The use of such a flat heat-insulating material for filling has the following effects.

(1) The flat heat insulating material for filling can be manufactured at low cost.

(2) Since the flat heat-insulating material for filling can be easily inserted around the heat-insulating material and even a slight gap between the heat-insulating materials, workability is greatly improved and construction cost is significantly reduced.

(3) If the outer skin is broken after insertion into the gap, the flat heat-insulating material expands immediately and fills the gaps around the heat-insulating material to enhance the heat-insulating effect, and at the same time increases the holding power of the heat-insulating material by the mounting bolts. Make it even stronger.

(4) Since the flat heat-insulating material for sealing after filling the gap is still wrapped in the plastic film bag, invasion of water vapor and the like through the gap is prevented, and a large heat insulating effect is maintained for a long period of time.

In short, according to the first aspect, the cotton-like or spongy elastic heat-insulating material such as glass wool or soft urethane foam is flatly compressed, wrapped in an airtight film, and vacuum-packed, so that the workability and the heat insulating property are low in price. The heat-insulating material for filling according to the present invention is extremely useful in industry since a good heat-insulating material for a gap seal can be obtained.

According to the second invention, the flat heat-insulating material for filling described in (1) is inserted into the gaps formed around the plurality of blocks or the panel-shaped heat-insulating materials, and then one of the airtight films as the outer skin is inserted. By opening a hole in the part and breaking the vacuum, the gap around the heat insulating material can be quickly and reliably sealed at a low cost, and the heat insulating structure of the heat insulating structure can be maintained for a long period of time. It is extremely useful.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a manufacturing procedure of the filling flat heat insulating material of the present invention, and FIG. 2 is a longitudinal sectional view showing a procedure of filling the filling flat heat insulating material of FIG. 1 into a gap between the heat insulating materials. is there. FIG. 3 is a plan view showing a heat insulating material of a known liquefied gas tank,
FIG. 4 is a sectional view of FIG. 1 ... heat insulating material for filling, 2 ... plastic film, 3
... bag, 4 ... opening, 5 ... seal, 6 ... flat heat insulation material for filling gap, 7 ... clearance,

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koji Tachikawa 1-8-5 Kyomachibori, Nishi-ku, Osaka-shi, Osaka Inside Meisei Kogyo Co., Ltd. (72) Yukio Hosomi 1--8, Kyomachibori, Nishi-ku, Osaka-shi, Osaka No. 5 in Meisei Kogyo Co., Ltd.

Claims (2)

(57) [Claims] An inflatable heat-insulating material for filling gaps, wherein a cotton-like or spongy elastic heat-insulating material such as glass wool or soft urethane foam is flatly compressed, wrapped in an airtight film and vacuum-packed. 2. A flat heat-insulating material for filling as described in (1) is inserted into gaps formed around a plurality of blocks or panel-shaped heat-insulating materials, and holes are formed in a part of an airtight film as an outer skin thereof. A method for using an inflatable heat insulating material for filling a gap, characterized by breaking a vacuum by opening a gap.