JPS624315B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a support portion of a high-temperature container, and more particularly to a structure for reducing thermal stress in this portion by relaxing the temperature distribution at the connection portion between the container and the support.

As shown in Figure 1, the structure of the high-temperature container consists of a container 1 that can contain high-temperature liquid, a support 2 that extends upward from the outer periphery of the container 1, and a part of the support 2 and the outer periphery of the container 1. In such a high-temperature container, the upper end of the support 2 is received by surrounding structures, so that the container 1 is suspended and supported.

In such a high-temperature container, a heat insulating material is attached around the container to prevent heat dissipation from inside, and the support 2 is directly connected to the container 1, and the support itself is partially buried in the heat insulating material 3. . However, since the support is made of metal and is a good conductor of heat, heat dissipates easily, causing a sudden temperature difference inside the support.
Large thermal stresses will be generated in the support portion of the container.

In order to make the temperature distribution uniform, it is possible to increase the thickness of the plate at the support mounting part, but with such a structure, the temperature on the outside surface will follow transient changes in the internal temperature. This results in the generation of large thermal stress. Therefore, there is a demand for the structure of the support part to be as thin as possible, which is a situation that conflicts with relaxing the temperature distribution.

For this reason, the support part has a thin wall structure, and measures such as adding a heat insulation area and increasing the length of the support to alleviate temperature distribution have been taken.

An object of the present invention is to provide a configuration that can make the temperature distribution as uniform as possible at the connection between a high temperature container and its support and reduce thermal stress during steady state and thermal transients.

The present invention provides a structure comprising a container containing a high-temperature fluid, a heat insulating material provided on the outer peripheral surface of the container, and a support attached to the container and supporting the container, the outer surface of the container and the outer surface of the support. A heat transfer means having better heat transfer properties than the heat insulating material is provided between the container and the heat insulating material near the base of the support, surrounded by the outer surface of the container and the heat insulating material. According to this configuration, the heat transfer means transfers heat from the outer surface of the container to the support side, so that the temperature gradient at the base of the support to the container becomes gentle compared to the temperature of the container, and the temperature near the base of the support is reduced. Thermal stress can be reduced.

Examples of the present invention will be described below.

The basic idea in this example is shown in Figure 2.
According to Figure 3. FIG. 2 shows an example in which a good thermal conductor 4 is attached to the connection between the container 1 and the support 2. In addition to heat flowing through the support itself, some heat also flows to the support through good heat conductors, which eases the temperature distribution in this area. FIG. 3 shows an example in which a gas passage 5 is installed to guide high-temperature gas from the wall surface of the container 1. The hot gas is directed to the cooler part of the support and increases the temperature of this part. As a result, the temperature of the support part on the container side increases, and the temperature distribution near the container and support connection part can be relaxed.

Next, examples of the present invention will be described in more detail.

This embodiment is an example in which the present invention is applied to the conventional high-temperature container shown in FIG. 1, and the same components as in the conventional example are given the same reference numerals.

As shown in FIG. 5, a support 2 extends upward from the middle of the container 1 containing the high temperature liquid.
This support 2 is received by the surrounding structure, so that the container is supported in a suspended manner.
The outer periphery of the container 1 and a part of the support 2 are surrounded by a heat insulating material 3. The high temperature liquid in the container 1 is kept warm by this heat insulating material.

A portion of the heat insulating material 3 facing the base of the support 2 to the container 1 is removed to create a space closed by the outer surface of the container 1 and the heat insulating material 3. This space is used as a gas flow path 5 which is a means for transmitting heat from the outer surface of the container 1 to the support 2. This gas flow path 5 is
As shown in FIG. 5, they are arranged to surround the outer periphery of the container 1. Furthermore, in order to enable communication between the gas flow path 5 above the support 2 and the gas flow path 5 below the support 2, gas passage holes 7 are provided in some places in the support 2 so that the strength of the support 2 is not adversely affected. They are spaced apart from each other in the circumferential direction.

In this gas flow path 5, as a heat transfer means, metal fibers 6 made of woven metal with good thermal conductivity processed into thin fibers are placed between the outer surface of the container 1 and the support as shown in FIG. Insulating material 3
The metal fibers 6 are placed along the outer periphery of the container 2.

According to the above-mentioned relationships between each structure and each structure, the following effects can be obtained.

That is, when high-temperature liquid enters the container 1, the container 1 becomes high temperature, and the temperature difference between the container 1 and the support 2 increases. The heat of the container 1, which has previously reached a high temperature, raises the temperature of the gas (air) in the gas flow path 5, causes convection, and gives heat to the surface of the support 2. At this time, part of the convection flows through the gas passage hole 7 to achieve temperature uniformity in a wide band. On the other hand, the heat of the container 1 is conducted from the outer surface of the container 1 through the metal fibers 5 to the surface of the support 2.

By adopting such a structure, the temperature distribution between the container and the support connection portion can be relaxed. In addition, the metal fibers attached to the connection part are easily deformed, and since they are only in contact with the container and support, they do not restrain the container and support structure, so the stress generated at the connection part is absorbed by the container and support structure. It is determined only by the temperature distribution.

In this embodiment, the metal fiber 6 and the gas flow path 5 are used together as the heat transfer means, but only one of the heat transfer means may be used.

According to the present invention, since the temperature distribution at the connection portion between the high temperature container and the support can be relaxed, it is possible to prevent generation of large thermal stress at this portion.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view of a conventional high temperature container, Figure 2 is
FIG. 3 is a schematic diagram of the principle of an embodiment of the present invention when each heat transfer means is used alone, FIG.
FIG. 1 is a longitudinal sectional view corresponding to FIG. 1 of a high temperature container according to an embodiment of the present invention. 1... High temperature container, 2... Support, 3... Heat insulating material, 4... Good conductor of heat, 5... Gas flow path, 6...
Metal fiber, 7...Gas passage hole.

Claims (1)

[Scope of Claims] 1. A structure consisting of a container containing a high-temperature fluid, a heat insulating material provided around the outer periphery of the container, and a support attached to the container to support the container, wherein the outer surface of the container and the A support for a high-temperature container, characterized in that a heat transfer means having better heat transfer properties than the heat insulating material between the outer surface of the support and the heat insulating material is surrounded by the outer surface of the container and the heat insulating material and provided near the base of the support. . 2. The support for a high temperature container according to claim 1, wherein the heat transfer means is an aggregate of fibrous metal. 3. The support for a high-temperature container according to claim 1, wherein the heat transfer means is a gas flow path formed by a space provided between the outer surface of the container and a heat insulating material. .