JP2023035483A - Pressure resistance/thermal insulation pipe and thermal insulation device and thermal insulation method of pipe and container using the same - Google Patents

Abstract

To provide a device for preventing a temperature drop of substance flowing in a pipe and/or the substance in the inside of a container, and provide a method.SOLUTION: A thermal insulation device of a pipe and a container has a structure in which an outer circumference of a pipe and/or a container is covered by a plate-like substance, a pressure resistance/thermal insulation pipe superior in heat resistance characteristics is installed in the outer circumferential part of the plate-like substance, and the outer circumference is covered by the plate-like substance. An insulating layer of air is formed between the plate-like substance covering the surface of the pipe and/or the container and the outer circumference of the pipe and/or the container. Also, the thermal insulation device and the thermal insulation method of the pipe and the container have a structure in which a sealed space is made by closing both ends of a space constituted of the plate-like substance covering the outer circumference of the pipe and/or the container and the plate-like substance covering the outer circumference of a cylindrical substance installed in a shape such as a helical shape and/or a consecutive U-tube shape in the outer circumferential part of the pipe and/or container, and thereby this space is assumed as a vacuum insulating layer.SELECTED DRAWING: Figure 3

Description

In the present invention, the amount of heat possessed by the substance flowing in the pipe and the substance inside the container moves from the surface of the pipe and container with a high temperature to the surroundings with a low temperature, so that the substance flowing in the pipe and the inside of the container Apparatus and method for preventing the temperature of a substance from dropping.

It is well known that by making the outer periphery of a tube or container a double structure and evacuating the inside thereof, the heat insulating effect is remarkably improved. However, when the inside of the container is evacuated, the internal pressure of the space composed of the surface of the double-structured pipe or container and the structure covering it decreases, so the substances that make up the surface of the double-structured pipe or container There is a possibility that the material forming the surface of the double structure pipe or container and the structure covering it will be deformed by the pressure acting on the structure covering it. In order to prevent this, a new structure is inserted between the surface of the double-structured pipe or container and the structure covering it, and this is given the role of a support, thereby Measures are taken to prevent deformation of the material composing the surface of the surface and the structure covering it.
For example, Patent Literature 1 describes "a technique of helically winding a metal wire spacer having a circular cross section provided in a space between double cylinders forming a heat insulating layer around an inner tube in a tube".
In addition, Patent Document 2 states, "A vacuum chamber is formed by providing a closed double tube around the container, and a metal wire or wire mesh having a circular cross section is wound around the outer circumference of the container to maintain the structure of the vacuum layer. technology” is mentioned.

JP-A-8-144740 JP 2002-228055 A

In general, by making the outer periphery of a pipe or container a double structure and evacuating the inside, the heat insulating effect is greatly improved. Since there is a possibility of deformation, in order to prevent this, as described in the patent document, ``a long object with a circular cross section is spirally wound around the outside of the tube or container (inside the vacuum layer)''. However, it is difficult to use this method for anything other than special, high-value-added applications because it is necessary to consider the following items. .
(1) In order to obtain the strength to withstand vacuum, it is necessary to improve the strength of the material that constitutes the surface of the tube and container, so to use this method, the design of the tube and container itself must be changed may become
(2) Improving the strength of the material forming the surface of the tube or container generally increases manufacturing costs and weight.
(3) In order to prevent deformation of the double structure, when using a method such as "spirally winding a long object with a circular cross section around the outside of the tube or container (inside the vacuum layer)" The weight of the wrapping material will be added.
(4) If for some reason the airtightness of the closed space formed by the surface of the double-structured pipe or container and the structure covering it is impaired, the heat insulation effect may be greatly reduced.

Therefore, the present invention provides an insulation device other than a vacuum insulation structure, which has the following elements, can be installed in existing pipes and containers, has high versatility, and has a structure with relatively little increase in volume and weight, and a pipe To provide a heat insulating device and method having a vacuum heat insulating structure that can be installed in an existing pipe or container without changing the design of the pipe or container.
(1) Existing tubes and vessels can be used as they are by avoiding a double vacuum structure including the structure of tubes and vessels (materials constituting the surface).
(2) As a structure such as a long object with a circular cross-section that is spirally wound around a pipe or container, use a hollow cylindrical light-weight material filled with a gas with a pressure higher than the atmospheric pressure. As a result, the heat insulating effect is enhanced and the weight is reduced.
(3) Cover the surface of a tube or container with a plate-like substance with concave and/or convex surfaces, install a long object with a circular cross section that is spirally wound around it, and wrap the circumference around it on the surface. By using the structure of covering with a plate-like substance having concaves and/or convexes, it is possible to enhance the heat insulating effect by forming a double heat insulating layer on the outer circumference of the tube or container.
(4) Cover the surface of a tube or container with a plate-shaped substance with concave and/or convex surfaces, install a long object with a circular cross section that is spirally wound around it, and wrap the circumference around it on the surface. A plate-shaped material with concaves and/or convexes covering the surface of a tube or container and a long length with a circular cross section that is spirally wound around the plate-like substance with concaves and/or convexes By closing both ends of a space formed by a plate-like substance having concaves and/or convexes on the surface covering the surroundings of an object and evacuating the inside thereof, it is possible to further enhance the heat insulating effect. .

According to the second law of thermodynamics, "Thermal energy flows from a place with a higher temperature to a place with a lower temperature", the temperature of the fluid flowing through the tube or the substance inside the container (TH: Temperature High) is lower than the ambient temperature (TL: Temperature Low). If is also high, the amount of heat (thermal energy) is transferred to the surroundings through the material that constitutes the tube or vessel, and the temperature of the fluid flowing through the tube or the material within the vessel decreases in proportion to this amount of heat.
If the amount of heat transferred per unit time is Q, Q is the thermal conductivity (CT: Coefficient of Thermal
Conductivity), temperature difference (TH-TL), heat-transfer surface (HS), and inversely proportional to movement distance (D). For this reason, in tubes and containers of the same shape,
Assuming that the thermal conductivity CT and the heat transfer area HS are the same, the higher the temperature of the substance in the tube or container, the greater the amount of transferred heat Q, resulting in a sudden drop in temperature. In order to prevent heat transfer (temperature drop) between the fluid flowing in the pipe or the substance in the container and the surroundings, a thermal conductivity CT is required between the fluid flowing in the pipe or the substance in the container and the surroundings. By forming a heat insulating layer with a small value and a large value of the movement distance D, the value of the amount of heat transferred (released) from the pipe or container to the surroundings can be reduced.

In the first aspect of the invention, metal or other material is placed inside a hollow substance that is lightweight and has excellent thermal conductivity characteristics (for example, a fluororesin tube with a thermal conductivity value of about 0.3 [W/mK]). It is filled with a gas (e.g. air or nitrogen) that has superior thermal conductivity characteristics to a pressure higher than the atmospheric pressure, and the surroundings of the hollow material that is lightweight and has excellent thermal conductivity characteristics has heat resistance characteristics. It is characterized by a structure that is covered with a material that is excellent in heat resistance (for example, silica tape with a heat resistance of about 1000 ° C).

Fluororesin tubes have a thermal conductivity value of about 0.3 [W/mK], which is very low compared to metal materials, but they are vulnerable to external pressure and easily deformed. . However, when used, the maximum working pressure is 0.5 MPa when the inside is filled with fluid, and it has pressure resistance. Taking advantage of this characteristic, by closing both ends of the tube and filling the inside with gas such as air or nitrogen, which has superior thermal conductivity characteristics than metal materials, it has the characteristic of withstanding external pressure. Become. For example, a rubber tire is deformed by a small amount of external pressure as it is. It will show completely different characteristics that can withstand the impact of time. By applying this property to a hollow substance with excellent thermal conductivity properties, it will have excellent properties that are significantly different from those of the raw material.

In the invention according to claim 2, a metal or other material is placed inside a hollow substance that is lightweight and has excellent thermal conductivity characteristics (for example, a fluororesin tube with a thermal conductivity value of about 0.3 [W / mK]). It is filled with a gas (e.g. air or nitrogen) that has superior thermal conductivity characteristics to a pressure higher than atmospheric pressure, and is lightweight and has excellent thermal conductivity characteristics (e.g. thermal conductivity value is about 0.3 [W/mK]) is covered with a material with excellent heat resistance (for example, a silica tape with a heat resistance of about 1000°C).

By applying this method to a material that is hollow and has excellent thermal conductivity properties, it will have excellent properties that are significantly different from those of the material.

In the invention according to claim 3, a pressure-resistant and heat-insulating pipe having excellent heat resistance is installed in a shape such as a spiral and/or continuous U-shaped pipe on the outer periphery of the pipe and/or the container, and the pipe and/or A spiral or continuous U-tube shape is placed on the outer periphery of the container, and the outer periphery of the cylindrical substance is covered with a plate-shaped substance having concave and/or convex surfaces. , or, on the outer circumference of the container, a heat insulating layer composed of a hollow cylindrical substance and the gas inside, and a plate-like substance covering the surface of the pipe and/or the container and the outer circumference of the cylindrical substance Due to the heat insulating layer of gas formed between By doing so, it has a function of preventing the temperature of the substance flowing through the tube and/or the substance inside the container from dropping.

If there is a difference between the temperature of the fluid flowing through the pipe or the substance in the container and the surrounding temperature, the amount of heat proportional to this temperature difference will be transferred from the high temperature substance to the low temperature substance, causing the temperature of the high temperature substance to drop. do. In order to prevent this, a space composed of a substance with low thermal conductivity is formed between the surface of a pipe or container with a high temperature and the surroundings with a low temperature, and by lengthening the heat transfer distance, It is necessary to minimize the amount of heat transfer, which is proportional to thermal conductivity and inversely proportional to travel distance. The invention of claim 1 is embodied by a structure in which pressure-resistant and heat-insulating pipes with excellent heat resistance characteristics are installed in a spiral shape or U-shaped shape on the outer periphery of the pipe and/or the container. It is. That is, a hollow cylindrical substance filled with a gas with a pressure higher than the atmospheric pressure (for example, air has a thermal conductivity of 2.614 x 10 ^-2 [W/mK] at 300°C), and Alternatively, a spiral or U-shaped tubular structure is installed on the outer periphery of the container, and the hollow cylindrical substance is made of a metal or non-metallic substance with a small thermal conductivity value and density. , it is possible to form a heat insulating layer of a lightweight structure with excellent heat insulating properties around pipes and containers. As a specific hollow cylindrical substance, for example, if the surface temperature of a tube or container is less than about 250°C, the heat resistance temperature is about 250°C and the thermal conductivity near that temperature is 0.24 [W/mK]. By using a low density material such as fluoropolymer (PTFE), the distance traveled using a material with low thermal conductivity (adjusted by the diameter of the hollow cylindrical material) between the outer surface and the surroundings of the tube or container It is possible to form a lightweight (with little weight increase) layer having a The thermal conductivity value of fluororesin (PTFE) is very small compared to iron's 80.3 [W/mK] (300°C) and stainless steel's 16.0 [W/mK]. This value is equivalent to 0.2 to 0.3 [W/mK] for heat insulating materials with heat resistant temperatures. If the surface temperature of the tube or container is about 250°C or higher, a heat-resistant metal or the like is used as the hollow cylindrical material. By using a hollow cylindrical material with a low conductivity value, the weight and thermal conductivity increase can be mitigated.
The specific shape of the hollow cylindrical substance is generally circular or elliptical. It does not have to be cylindrical as long as it has a shape that reduces the area).

In the invention according to claim 4, a pressure-resistant and heat-insulating pipe having excellent heat resistance is installed in a shape such as a spiral and/or continuous U-shaped pipe on the outer periphery of the pipe and/or the container, and the pipe and/or A spiral or continuous U-tube shape is placed on the outer periphery of the container, and the outer periphery of the cylindrical substance is covered with a plate-shaped substance having concave and/or convex surfaces. , or, on the outer circumference of the container, a heat insulating layer composed of a hollow cylindrical substance and the gas inside, and a plate-like substance covering the surface of the pipe and/or the container and the outer circumference of the cylindrical substance By using a method of forming a gas insulation layer between It is characterized by having the function of preventing the temperature of the substance flowing through the tube and/or the substance inside the container from dropping by moving to an environment with a lower temperature.

By using the method described in the present invention, if the surface temperature of the tube or container is less than 250°C, the fluororesin tube can be used. A simple helical wrap of refractory metal with a low thermal resistance can significantly reduce heat transfer from the hot surface to the cold surroundings.

In the invention according to claim 5, a pressure-resistant and heat-insulating pipe having excellent heat resistance is installed in a shape such as a spiral and/or continuous U-shaped pipe on the outer periphery of the pipe and/or the container, and the pipe and/or A spiral and/or continuous U-tube shape is placed on the outer periphery of the container, and the outer periphery of the cylindrical substance is covered with a plate-shaped substance having concave and/or convex surfaces to form the tube and/or container. The space formed by the plate-like substance covering the surface and the outer periphery of the cylindrical substance is closed at both ends, and is formed between the surface of the tube and/or container and the plate-like substance with both ends closed. By evacuating the enclosed space, a heat insulating layer composed of a hollow cylindrical substance and gas inside it is formed on the outer periphery of the tube and/or container, and the surface of the tube and/or container and the cylindrical shape Due to the vacuum insulation layer formed between the plate-shaped substance covering the outer circumference of the substance of It is characterized by having a function of preventing the temperature of the substance flowing through the tube and/or the substance inside the container from dropping by moving from the surface of the container to the surroundings where the temperature is low.

A long object with a circular cross-section such as a spiral and/or continuous U-shaped tube is placed on the surface of a pipe or container, and its surroundings are covered with a plate-like material with concave and/or convex surfaces to create a pipe or container. By forming a heat insulating layer on the outer periphery of the , it is possible to enhance the heat insulating effect. Furthermore, by closing both ends of a plate-like substance having a concave and/or convex surface covering the surface of the tube or container, , or a plate-like substance having projections, and by making the space a closed space and evacuating the inside thereof, it is possible to enhance the heat insulating effect.

Assuming that the amount of heat transferred per unit time is Q, Q is proportional to the thermal conductivity CT, the temperature difference (TH-TL), and the heat transfer area HS, and inversely proportional to the travel distance D. In claims 1 and 2, the device and method for reducing the amount of heat transfer Q by reducing the value of thermal conductivity are described. The heat insulating effect can be further enhanced by making the space composed of a plate-shaped substance having concaves and/or convexes on the surface covering the closed space a closed space and evacuating the inside of the closed space.
That is, since the transfer of heat is the transfer of energy between molecules, it is composed of the surface of the tube or container and the plate-like substance covering the surface of the tube or container and having concaves and/or convexes on the surface. By making the space a closed space and evacuating the inside, the number of molecules existing in the closed space decreases in proportion to the degree of vacuum, so the amount of heat transfer decreases in proportion to the degree of vacuum in this space. In addition, the heat transfer has a shape such as a spiral and/or continuous U-tube shape installed on the surface (periphery) of the tube and/or container to prevent deformation of the sealed space whose interior is vacuum. It is installed on the surface (periphery) of the tube and/or the container because it is proportional to the thermal conductivity, movement distance, and heat transfer area of the hollow cylindrical substance and the gas inside it that has a pressure higher than the atmospheric pressure. , a spiral and/or a continuous U-shaped hollow cylindrical substance is made of a material with low thermal conductivity, and the interior is filled with a gas with low thermal conductivity. And/or, a hollow cylindrical substance having a shape such as a continuous U-tube shape contacts the surface of the pipe or container and the plate-shaped substance covering the surface of the pipe or container to reduce the contact area (heat transfer area is further reduced by reducing

In the invention according to claim 6, a pressure-resistant and heat-insulating pipe excellent in heat resistance is installed in a shape such as a spiral and/or continuous U-shaped pipe on the outer periphery of the pipe and/or the container, and the pipe and/or A spiral and/or continuous U-tube shape is placed on the outer periphery of the container, and the outer periphery of the cylindrical substance is covered with a plate-shaped substance having concave and/or convex surfaces to form the tube and/or container. The space formed by the plate-like substance covering the surface and the outer periphery of the cylindrical substance is closed at both ends, and is formed between the surface of the tube and/or container and the plate-like substance with both ends closed. By evacuating the enclosed space, a heat insulating layer composed of a hollow cylindrical substance and gas inside it is formed on the outer periphery of the tube and/or container, and the surface of the tube and/or container and the cylindrical shape By using the method of forming a vacuum insulation layer between the material and the plate-like material covering the outer periphery of the material, the amount of heat held by the material flowing in the pipe and/or the material inside the container is It is characterized by having a function of preventing the temperature of the substance flowing through the pipe and/or the substance inside the container from decreasing by moving from the surface of the high pipe and/or container to the surroundings where the temperature is low. do.

The surface of a tube or container is covered with a plate-shaped material having concave and/or convex surfaces, and a long object with a circular cross section such as a spiral and/or continuous U-shaped tube is placed around it. is covered with a plate-like material having concaves and/or convexes on the surface to form a double heat insulating layer on the outer circumference of the tube or container, the heat insulating effect can be enhanced. In addition, a plate-like substance with concave and/or convex surfaces covering the surface of a tube or container, and a long object with a circular cross-section such as a spiral shape and/or a continuous U-shaped pipe placed around it By closing both ends of the space formed by the plate-like material having concaves and/or convexes on the surface covering the periphery of the space and evacuating the inside thereof, it is possible to further enhance the heat insulating effect. Thus, by using the method described in the present invention, for example, a fluororesin tube whose inside is filled with a gas having a pressure is spirally wound around a tube or container at regular intervals, and the periphery is plate-shaped. Insulation filled with a gas with a pressure higher than atmospheric pressure, which has a thermal conductivity value of about 1/100 that of metal and 1/10 that of insulation Forming a layer, it is possible to greatly reduce the transfer of heat from the surface of the hot tube or vessel to the cold surroundings.

According to the seventh aspect of the invention, the outer periphery of the tube and/or the container is covered with a plate-like material having concaves and/or convexes on the surface, and a pressure-resistant pressure resistant・Insulated pipes are installed, and the outer periphery of a cylindrical substance is installed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of the pipe and/or container. As a structure that covers the outer periphery of the tube and/or container, between the surface of the tube and/or container and the plate-like substance with concave and/or convex surfaces covering the outer periphery A heat-insulating layer formed by a space filled with a gas having a pressure higher than the atmospheric pressure, a heat-insulating layer consisting of a hollow cylindrical substance and the gas inside, a pipe and/or a container. A plate-shaped substance with concave and/or convex surfaces on the covering surface, and a cylindrical substance placed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of a tube and/or container. The amount of heat retained by the substance flowing through the tube and/or the substance inside the container by forming a thermal insulation layer of gas between the covering surface and the plate-like substance with concaves and/or convexes However, by moving from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature, it has the function of preventing the temperature of the substance flowing in the pipe and/or the substance inside the container from decreasing. It is characterized by

The surface of a tube or container is covered with a plate-shaped material having concave and/or convex surfaces, and a long object with a circular cross section such as a spiral and/or continuous U-shaped tube is placed around it. is covered with a plate-like material having concaves and/or convexes on the surface to form a double heat insulating layer on the outer circumference of the tube or container, the heat insulating effect can be enhanced. In addition, a plate-like substance with concave and/or convex surfaces covering the surface of a tube or container, and a long object with a circular cross-section such as a spiral shape and/or a continuous U-shaped pipe placed around it By closing both ends of the space formed by the plate-like material having concaves and/or convexes on the surface covering the periphery of the space and evacuating the inside thereof, it is possible to further enhance the heat insulating effect.
In general, by making the outer periphery of a pipe or container a double structure and evacuating the inside, the heat insulation effect is greatly improved, but the surface of the double structure pipe or container and the structure covering it may deform Therefore, new techniques and methods are required to prevent this, and it is difficult to use this method for anything other than special, high-value-added applications. However, in cases where the temperature exceeds 500°C, such as in the exhaust pipe of an engine, the temperature difference between the fluid flowing through the pipe and the substance inside the container and the surroundings (outside air) becomes large, so a method called vacuum insulation is used. This enables effective heat insulation. In addition, expensive metals are used in the catalysts of exhaust gas purifiers that are installed to comply with regulations related to atmospheric environment purification, and it is necessary to keep the temperature of the exhaust system high in order for it to function effectively. Therefore, the use of vacuum insulation in such places can be said to be a special, high value-added application.

It consists of the surface of a tube or container and a structure that covers it, which becomes a double structure when the closed space formed between the surface of the tube and/or the container and the plate-like substance with both ends closed is evacuated. Since the internal pressure of the space decreases, there is a possibility of deformation due to the pressure acting on the surface of the double-structured pipe or container and the structure covering it. In order to prevent this, it is possible to use a structure in which a long object (wire-shaped) with a circular cross section or a hollow cylindrical substance with a vacuum inside is installed on the outer periphery of the tube and/or container. When a circular elongated object (wire-like) is used, increasing the diameter of the circular cross-sectional elongated object (wire-like) in order to increase the heat transfer distance increases the weight. In addition, when using a hollow cylindrical substance with a vacuum inside, it is necessary to use a hollow cylindrical substance with a material and shape that can withstand deformation due to the vacuum inside (after installation, it is necessary to use a hollow cylindrical substance There is no pressure difference because the surroundings of the hollow cylindrical substance with a vacuum are also vacuumed, but this is taken into account in the state of the “hollow cylindrical substance with a vacuum inside” at the stage of spiral winding There is a need).

On the other hand, under atmospheric pressure, if both ends of a "pressure-resistant and heat-insulating tube with excellent heat resistance" are closed and the inside is made into a sealed space, a plate-like substance with the surface and both ends of the container closed will be formed. Even if the closed space formed between the Even if the internal pressure of the space formed by the structure is reduced, it is possible to maintain the role of the support for preventing the deformation of the surface of the pipe or container and the structure covering it.
In addition, when closing both ends of the "pressure-resistant and heat-insulating pipe with excellent heat-resistant characteristics" to make the inside a sealed space, the pressure inside the "pressure-resistant and heat-insulating pipe with excellent heat-resistant characteristics" must be at least 1 atm. As a result, it is possible to more effectively perform the function of "role of support for preventing deformation of the surface of the tube or container and the structure covering it".

According to the eighth aspect of the invention, the outer periphery of the tube and/or the container is covered with a plate-like material having concaves and/or convexes on the surface, and the outer periphery of the plate-like substance is provided with a pressure resistance excellent in heat resistance.・Insulated pipes are installed, and the outer periphery of a cylindrical substance is installed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of the pipe and/or container. As a structure that covers the outer periphery of the tube and/or container, between the surface of the tube and/or container and the plate-like substance with concave and/or convex surfaces covering the outer periphery A heat-insulating layer formed by a space filled with a gas having a pressure higher than the atmospheric pressure, a heat-insulating layer consisting of a hollow cylindrical substance and the gas inside, a pipe and/or a container. A plate-shaped substance with concave and/or convex surfaces on the covering surface, and a cylindrical substance placed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of a tube and/or container. Substance flowing through the tube and/or substance inside the container by using a method of forming a gas insulating layer formed between a plate-like substance having concaves and/or convexes on the covering surface The amount of heat possessed by is transferred from the surface of the pipe and/or container, which has a high temperature, to the surrounding area, which has a low temperature, thereby preventing the temperature of the substance flowing in the pipe and/or the substance inside the container from decreasing. It is characterized by having the function of

The surface of a tube or container is covered with a plate-shaped material having concave and/or convex surfaces, and a long object with a circular cross section such as a spiral and/or continuous U-shaped tube is placed around it. is covered with a plate-like material having concaves and/or convexes on the surface to form a double heat insulating layer on the outer circumference of the tube or container, the heat insulating effect can be enhanced. In addition, a plate-like substance with concave and/or convex surfaces covering the surface of a tube or container, and a long object with a circular cross-section such as a spiral shape and/or a continuous U-shaped pipe placed around it By closing both ends of the space formed by the plate-like material having concaves and/or convexes on the surface covering the periphery of the space and evacuating the inside thereof, it is possible to further enhance the heat insulating effect.

According to the ninth aspect of the invention, the outer periphery of the tube and/or the container is covered with a plate-like material having concaves and/or convexes on the surface, and the outer periphery of the plate-like substance is provided with a pressure resistance excellent in heat resistance.・Insulated pipes are installed, and the outer periphery of a cylindrical substance is installed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of the pipe and/or container. A plate-shaped substance with concaves and/or convexes on the surface that covers the outer circumference of the pipe and/or container, and a spiral and/or continuous U on the outer circumference of the pipe and/or container A space composed of a plate-shaped substance with concave and/or convex surfaces covering the outer periphery of a cylindrical substance installed in a shape such as a hexagonal tube is closed at both ends to form a sealed space, and this space is evacuated. By doing so, the outer circumference of the pipe and/or container is formed between the surface of the pipe and/or container and the plate-like substance with concaves and/or convexes on the surface covering the outer circumference A thermal insulation layer formed by a space filled with a gas with a pressure above atmospheric pressure, a thermal insulation layer composed of a hollow cylindrical substance and the gas inside it, covering the outer circumference of a tube and/or container It covers the outer periphery of a plate-shaped substance with concave and/or convex surfaces, and a cylindrical substance placed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of a tube and/or container. The amount of heat held by the substance flowing through the tube and/or the substance inside the container is formed between a plate-shaped substance with concaves and/or convexes on the surface and forms a heat insulating layer with a vacuum sealed space, By moving from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature, it is possible to prevent the temperature of the substance flowing in the pipe and/or the substance inside the container from decreasing. Characterized by

The surface of a tube or container is covered with a plate-shaped material having concave and/or convex surfaces, and a long object with a circular cross section such as a spiral and/or continuous U-shaped tube is placed around it. is covered with a plate-like material having concaves and/or convexes on the surface to form a double heat insulating layer on the outer circumference of the tube or container, the heat insulating effect can be enhanced. In addition, a plate-like substance with concave and/or convex surfaces covering the surface of a tube or container, and a long object with a circular cross-section such as a spiral shape and/or a continuous U-shaped pipe placed around it By closing both ends of the space formed by the plate-like material having concaves and/or convexes on the surface covering the periphery of the space and evacuating the inside thereof, it is possible to further enhance the heat insulating effect.
Metals, resins, and petrochemical products are assumed to be pressure-resistant and heat-insulating pipes with excellent heat-resistant properties, but the heat-resistant temperature of these is often 200 to 300°C. On the other hand, many substances generally used as heat insulating materials have a heat resistance temperature exceeding 1000°C. The invention in the present claim is intended to compensate for the shortcomings by combining the advantages of these materials. Specifically, the heat-insulating material that covers the outer surface of the tube or container, which has excellent heat resistance properties but is soft and needs to be fixed in some way, is a grid-like substance or a mesh with an opening of 2000 μm (10 mesh). ) ~ 300 μm (50 mesh) opening of stainless steel filter material or other wire mesh is fixed, and pressure-resistant and heat-insulating pipes with excellent heat resistance characteristics are installed around this, so that the surface temperature of the pipe and container can reach 1000 ° C. Even if it is above, the temperature is first lowered by the heat insulating material (increase the temperature difference that is inversely proportional to the thermal conductivity and proportional to the distance traveled = lowering the surface temperature of the heat insulating material). By installing a hollow cylindrical substance made of metal, resin, petrochemicals, etc., filled with a gas with a pressure above atmospheric pressure, or with a vacuum inside, the value of thermal conductivity It is possible to reduce heat transfer from the surface of a pipe or container to the surroundings by forming a small, thick (long heat transfer distance) insulating layer.

According to the tenth aspect of the invention, the outer periphery of the tube and/or the container is covered with a plate-like material having concaves and/or convexes on the surface, and a pressure-resistant pressure resistant・Insulated pipes are installed, and the outer periphery of a cylindrical substance installed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of the pipe and/or container is a plate with concave and/or convex surfaces A plate-shaped substance with concaves and/or convexes on the surface that covers the outer periphery of the tube and/or container, and a helical and/or continuous A closed space is formed by closing both ends of a space composed of a plate-like substance with concaves and/or convexes on the surface covering the outer periphery of a cylindrical substance placed in a shape such as a U-tube. By applying a vacuum, a plate-like material having concaves and/or convexes on the surface covering the tube and/or container surface and the outer circumference of the pipe and/or container is formed. A thermal insulating layer formed by a space filled with a gas having a pressure above atmospheric pressure, a thermal insulating layer consisting of a hollow cylindrical substance and the gas inside it, covering the outer circumference of a pipe and/or container Concavities and/or convexes on the surface covering the outer periphery of a plate-shaped substance and a cylindrical substance placed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of a tube and/or container By using the method of forming a heat insulating layer with a vacuum sealed space between a certain plate-like substance, the amount of heat possessed by the substance flowing in the pipe and/or the substance inside the container is reduced to a high temperature. It is characterized by having a function of preventing the temperature of the substance flowing through the pipe and/or the substance inside the container from decreasing by moving from the surface of the pipe and/or container to the surroundings where the temperature is low. .

The surface of a tube or container is covered with a plate-shaped material having concave and/or convex surfaces, and a long object with a circular cross section such as a spiral and/or continuous U-shaped tube is placed around it. is covered with a plate-like material having concaves and/or convexes on the surface to form a double heat insulating layer on the outer circumference of the tube or container, the heat insulating effect can be enhanced. In addition, a plate-like substance with concave and/or convex surfaces covering the surface of a tube or container, and a long object with a circular cross-section such as a spiral shape and/or a continuous U-shaped pipe placed around it By closing both ends of the space formed by the plate-like material having concaves and/or convexes on the surface covering the periphery of the space and evacuating the inside thereof, it is possible to further enhance the heat insulating effect.
By using the method described in the present invention, it is possible to reduce the amount of heat transferred from a tube or container with a surface temperature of 1000° C. to the surroundings. Specifically, the surface of the pipe or container is covered with a heat insulating material with a heat resistance temperature of 1000°C or higher and a thermal conductivity of 0.2 [W/mK], and pressure resistant and heat insulating pipes with excellent heat resistance characteristics are attached to each other around it. By twisting and helically winding, the heat insulating material covering the surface of the tube or container can be fixed and the temperature drop of the substance flowing through the pipe and/or the substance inside the container can be prevented.

By using the present invention, it is possible to prevent the temperature drop of the substance flowing through the tube and the substance inside the container.

1 shows a basic configuration according to an embodiment of the present invention; 1 shows an example of a basic configuration according to an embodiment of the present invention. 1 shows an application configuration according to an embodiment of the present invention; 1 shows an example of an application configuration according to an embodiment of the present invention.

EMBODIMENT OF THE INVENTION Below, it demonstrates, referring drawings for embodiment which concerns on this invention.
According to the second law of thermodynamics, "Thermal energy flows from a place with a higher temperature to a place with a lower temperature", the temperature of the fluid flowing through the tube or the substance inside the container (TH: Temperature High) is lower than the ambient temperature (TL: Temperature Low). If is also high, the amount of heat (thermal energy) is transferred to the surroundings through the material that constitutes the tube or vessel, and the temperature of the fluid flowing through the tube or the material within the vessel decreases in proportion to this amount of heat.
Assuming that the amount of heat transferred per unit time is Q, Q is proportional to the coefficient of thermal conductivity (CT), the temperature difference (TH-TL), and the heat-transfer surface (HS). It is inversely proportional to (D: Distance). For this reason, if the heat conductivity and heat transfer area are the same in a tube or container of the same shape, the temperature TH of the high-temperature substance in the tube or container and the temperature TL of the surroundings, which is relatively low, will be The greater the difference, the greater the amount of transferred heat Q, and the temperature TH of the high-temperature substance in the tube or container drops rapidly. From these facts, in order to prevent heat transfer (temperature drop) between the fluid flowing in the pipe or the substance in the container and the surroundings, heat conduction must be established between the fluid flowing in the pipe or the substance in the container and the surroundings. By forming a layer of a material with a low modulus (decreasing the value of thermal conductivity and increasing the value of migration distance), the value of the amount of heat transferred (released) from the tube or container to the surroundings, Q, is reduced. As a result, it can be seen that the temperature TH of the high-temperature substance in the tube or container can be prevented from lowering.

FIG. 1 shows a basic configuration according to an embodiment of the invention.
When the temperature (TH) of the tube or vessel (1) is higher than the ambient temperature (TL), the temperature (TH) of the tube or vessel (1) decreases due to the transfer of heat (Q) from the tube or vessel towards the ambient. do. In the present invention, if the temperature (TH) inside the tube or container in the initial state, the ambient temperature (TL), and the heat transfer area (HS) are constant (for tubes or containers of the same shape), The amount of heat (Q) transferred to the pipe or container (1) shown in FIG. The heat conductivity of the space formed between the plate-like substances (3) covering the outer periphery of the tube and/or the pressure and heat insulating tube spirally wound around the outer periphery of the container proportional to the average thermal conductivity (CT) and inversely proportional to the average thickness (D) of the thermal insulation layer (4). From this, the space formed between the surface of the pipe or container and the plate-like substance (3) covering the outer circumference of the hollow cylindrical substance (2) installed on the outer circumference of the pipe and/or container ( The thermal conductivity of 4) and the average thermal conductivity of the hollow cylindrical substance (2) installed on the outer periphery of the tube or container are made as small as possible, and the diameter of the hollow cylindrical substance (2) is increased. By increasing the average thickness of the heat insulating layer, the ability of the heat insulating layer, which is composed of average thermal conductivity (CT) and moving distance (D), is improved, and the heat from the pipe or container (1) to the surroundings is improved. It can be seen that the value of the transferred heat quantity Q becomes smaller and the temperature drop in the tube or container can be reduced.

Metal is generally used as a specific material for the hollow cylindrical substance (2) installed on the outer periphery of the tube or container. ) is 237 [Wm/K], Fe (iron) is 80.3 [Wm/K], and SUS304 (austenitic stainless steel) is 16.0 [Wm/K]. On the other hand, the thermal conductivity of PTFE (fluororesin) is 0.24 [Wm/K], and the thermal conductivity of gas is 0.026 [Wm/K], which are much lower than those of metals. In addition, since the density (mass per unit volume) is also small, it has a low thermal conductivity and density compared to metals. By using PTFE (fluororesin), the structure is simpler than using a general heat insulating material with a thermal conductivity of about 0.2 [Wm/K]. is required), making it possible to form a heat insulating layer with low thermal conductivity.

In addition, by giving protrusions to a part of the flat plate covering the outer circumference of the cylindrical substance placed in the shape of a spiral and/or a continuous U-shaped tube on the outer circumference of the tube and/or the container to make it corrugated It is also possible to cope with thermal changes (expansion and contraction of containers and pipes) due to temperature changes of substances stored in containers and fluids flowing in pipes.

As a method for installing a hollow cylindrical substance (2) placed on the outer periphery of a pipe or container, protrusions (5) are placed throughout the inner surface of a plate-like substance covering the outer periphery of the hollow cylindrical substance. This makes it possible to fix the position of the hollow cylindrical substance (2).

In addition, a 90° elbow (6) that penetrates the plate-shaped substance (3) that covers the outer circumference of the hollow cylindrical substance (3) is used to connect the surroundings and the inside of the hollow cylindrical substance (2). , from the hole on the peripheral side of this 90° elbow (6), gas is injected toward the hole on the side inserted into the interior of the hollow cylindrical substance (2). By closing both ends of the hollow cylindrical substance, the interior of the hollow cylindrical substance can be made into a closed space.

Furthermore, when the heat insulating layer (4) is evacuated, the inner pressure of the space composed of the surface of the double-structured pipe or container (1) and the structure (3) covering it decreases, resulting in a double structure. In order to prevent deformation of the double-structured tube or vessel surface material and the covering structure due to the pressure acting on the surface material of the tube or container and the covering structure, A heat insulating layer is a structure that withstands external pressure by injecting a gas with a pressure equal to or higher than the atmospheric pressure into a hollow cylindrical material and closing both ends of the hollow cylindrical material to create a sealed space. To prevent deformation of the pipes that make up the heat insulating layer and/or the plate-like substance that covers the outer periphery of the hollow cylindrical substance installed on the surface of the container and its outer periphery due to external pressure. It becomes possible to

FIG. 2 shows an example of a basic configuration according to an embodiment of the present invention.
In order to have the structure of Fig. 1, before the pipe and/or container is connected to another structure, a pressure-resistant and heat-insulating pipe (2) with excellent heat resistance, and a spiral Since it is necessary to install a plate-like material (3) covering the outer periphery of the material placed in a shape and form a gas or vacuum heat insulating layer (4), it is already connected to an external structure. It is difficult to install a heat insulating device having the structure shown in FIG.
On the other hand, as shown in FIG. 2, by installing a pressure-resistant and heat-insulating pipe with excellent heat resistance in a shape such as a continuous U-shaped pipe on the outer periphery of the pipe and/or the container, the heat resistance shown in FIG. The structure and function of the heat insulation device and heat insulation method are preserved, and the structure and function of the heat insulation method are maintained. can be installed.

FIG. 3 shows an application configuration according to an embodiment of the invention.
The outer periphery of the tube and/or container is covered with a plate-shaped material (7) having concave and/or convex surfaces, and a pressure-resistant and heat-insulating tube (2) with excellent heat resistance is attached to the outer periphery of the plate-shaped material. is installed, and the outer periphery of the cylindrical substance (2) placed on the outer periphery of the pipe and/or container is covered with a plate-shaped substance (3) having concave and/or convex surfaces. or formed by a space filled with a gas having a pressure higher than atmospheric pressure formed between a tube and/or a plate-like substance covering the surface of the container and the outer periphery of the container A heat insulating layer (4), a hollow cylindrical substance, and a plate-shaped substance ( 7) A plate-shaped surface with concaves and/or convexes covering the outer periphery of a cylindrical substance placed in a shape such as a spiral and/or a continuous U-shaped tube on the outer periphery of a tube and/or container By forming a gas insulation layer close to an absolute vacuum between the material (3) of the Then, the amount of heat possessed by the substance flowing in the pipe and/or the substance inside the container moves from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature, thereby the substance flowing in the pipe and, Alternatively, it is possible to prevent the temperature of the substance inside the container from dropping.

As shown in FIG. 3, two or more protrusions on the inner side (surface side of the tube and/or container) of a plate-like substance with concave and/or convex surfaces covering the outer periphery of the pipe and/or container By providing the, it is possible to have the role of a support that maintains the space between the surface of the tube and/or container and the plate-like substance covering the outer periphery, and the size (height) of the protrusion can be By proportionally increasing the distance between the surface of the tube and/or the container and the plate-like substance covering the outer periphery thereof, it is possible to improve the effect of the heat insulating layer (4).

FIG. 4 shows an example of an application configuration according to an embodiment of the present invention.
In order to make the structure as shown in FIG. 3, before connecting the pipe and/or the container to another structure, the outer periphery of the pipe and/or the container is formed into a plate-like shape having concaves and/or convexes on the surface. The outer periphery of the plate-shaped substance is covered with a pressure-resistant and heat-insulating pipe (2) with excellent heat resistance, and the outer periphery of the substance installed in a spiral shape on the outer periphery of the pipe and/or container. Since it is necessary to install a plate-like substance (3) to cover and form a gas or vacuum heat insulating layer (4), a pipe or container already connected to an external structure can be used as shown in FIG. It is difficult to install a heat insulating device with the structure shown in .
On the other hand, as shown in FIG. 4, by installing a pressure-resistant and heat-insulating pipe with excellent heat resistance in a shape such as a continuous U-shaped pipe on the outer periphery of the pipe and/or the container, the heat resistance shown in FIG. The structure and function of the heat insulation device and heat insulation method are preserved, and the structure and function of the heat insulation method are maintained. can be installed.

INDUSTRIAL APPLICABILITY The present invention is applicable to maintaining the temperature of hot substances in tubes and containers.

1. tube or container2. Pressure-resistant and heat-insulating pipe with excellent heat resistance 3. 4. A plate-like substance covering the outer periphery of a substance placed in a shape such as a spiral shape and/or a continuous U-tube shape on the outer periphery of a tube and/or a container. Gas or vacuum insulation layer 5 . 5. Protrusions for determining the position of pressure-resistant and heat-insulating pipes with excellent heat resistance characteristics. 7. 90° elbow 8. A plate-like substance having concave and/or convex surfaces covering the outer circumference of the tube and/or container. Thermal insulation layer of air Q Transferred heat amount CT Thermal conductivity TH Temperature in tube or container TL Surrounding temperature D. Average thickness of insulation layer

Claims (10)

A hollow substance that is lightweight and has excellent thermal conductivity characteristics (for example, a fluororesin tube with a thermal conductivity value of about 0.3 [W/mK]) contains a material that has better thermal conductivity characteristics than metal or other materials. A gas (e.g. air or nitrogen) is filled so that the pressure is higher than the atmospheric pressure, and the hollow material that is lightweight and has excellent thermal conductivity is surrounded by a material that has excellent heat resistance (e.g. A pressure-resistant and heat-insulating tube with excellent heat resistance, characterized by a structure that is covered with silica tape (approximately 1000°C). A hollow substance that is lightweight and has excellent thermal conductivity characteristics (for example, a fluororesin tube with a thermal conductivity value of about 0.3 [W/mK]) contains a material that has better thermal conductivity characteristics than metal or other materials. Gas (e.g., air or nitrogen) is filled to a pressure higher than atmospheric pressure, and a hollow substance that is lightweight and has excellent thermal conductivity characteristics (e.g., a thermal conductivity value of about 0.3 [W/mK]) Fluorine resin tube) is covered with a material with excellent heat resistance (for example, silica tape with a heat resistance of about 1000 ° C). For example, a fluororesin tube with a thermal conductivity value of about 0.3 [W/mK]) is made into a pressure-resistant and heat-insulating tube with excellent heat resistance. A pressure-resistant and heat-insulating tube with excellent heat resistance is installed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the tube and/or the container, and a spiral shape and/or a continuous U-shaped tube is installed on the outer periphery of the pipe and/or the container. Alternatively, the outer circumference of a cylindrical substance placed in a shape such as a continuous U-shaped tube is covered with a plate-shaped substance, and the hollow cylindrical substance and the inside of the pipe and/or container A substance that flows through a tube due to an insulating layer composed of a certain gas and an insulating layer of air formed between the surface of the tube and/or the plate-like material covering the surface of the tube and/or the container and the outer circumference of the cylindrical material. and/or the amount of heat possessed by the substance inside the container is transferred from the surface of the pipe and/or container where the temperature is high to the surroundings where the temperature is low, causing the substance flowing through the pipe and/or the substance inside the container to 2. A pressure-resistant and heat-insulating pipe and a heat-insulating device for pipes and containers using the pressure-resistant and heat-insulating pipe according to claim 1, characterized in that it has a function of preventing the temperature from dropping. A pressure-resistant and heat-insulating tube with excellent heat resistance is installed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the tube and/or the container, and a spiral shape and/or a continuous U-shaped tube is installed on the outer periphery of the pipe and/or the container. Alternatively, the outer circumference of a cylindrical substance placed in a shape such as a continuous U-shaped tube is covered with a plate-shaped substance, and the hollow cylindrical substance and the inside of the pipe and/or container By using the method of forming an insulating layer composed of a gas and an insulating layer of air between the surface of the tube and/or container and the plate-like material surrounding the outer circumference of the cylindrical material. , the substance flowing through the tube and/or the heat possessed by the substance inside the vessel is transferred from the surface of the tube and/or vessel where the temperature is high to the surroundings where the temperature is low, and/or 3. A pressure-resistant and heat-insulating pipe and a method of insulating a pipe and a container using the same according to claim 2, wherein the pressure-resistant and heat-insulating pipe has a function of preventing the temperature of substances inside the container from lowering. A pressure-resistant and heat-insulating tube with excellent heat resistance is installed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the tube and/or the container, and a spiral shape and/or a continuous U-shaped tube is installed on the outer periphery of the pipe and/or the container. Or, it is formed by a plate-like substance covering the outer circumference of a cylindrical substance installed in a shape such as a continuous U-shaped tube with a plate-like substance, and covering the surface of the tube and/or the container and the outer circumference of the cylindrical substance. By closing both ends of the space to be filled and evacuating the sealed space formed between the surface of the tube and/or container and the plate-like substance with both ends closed, the outer circumference of the tube and/or container In addition, it is formed between a heat insulating layer consisting of a hollow cylindrical substance and the gas inside, and a plate-shaped substance covering the surface of the pipe and/or container and the outer circumference of the cylindrical substance. Due to the vacuum insulation layer, the amount of heat held by the substance flowing in the pipe and/or the substance inside the container moves from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature, thereby flowing through the pipe. The pressure-resistant and heat-insulating pipe and the pipe using the same according to claim 1 or claim 3, characterized in that it has a function of preventing the temperature of the substance and/or the substance inside the container from decreasing. and container insulation. A pressure-resistant and heat-insulating tube with excellent heat resistance is installed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the tube and/or the container, and a spiral shape and/or a continuous U-shaped tube is installed on the outer periphery of the pipe and/or the container. Or, it is formed by a plate-like substance covering the outer circumference of a cylindrical substance installed in a shape such as a continuous U-shaped tube with a plate-like substance, and covering the surface of the tube and/or the container and the outer circumference of the cylindrical substance. By closing both ends of the space to be filled and evacuating the sealed space formed between the surface of the tube and/or container and the plate-like substance with both ends closed, the outer circumference of the tube and/or container 2) Vacuum insulation between a heat insulating layer consisting of a hollow cylindrical substance and the gas inside it, and a plate-shaped substance covering the surface of the pipe and/or container and the outer circumference of the cylindrical substance Transfer of the heat of the material flowing in the tube and/or the material inside the container from the hot surface of the tube and/or container to the cold surroundings by using the method of forming layers. The pressure-resistant and heat-insulating tube according to claim 2 or 4, characterized in that it has the function of preventing the temperature of the substance flowing through the pipe and/or the substance inside the container from decreasing. A method of insulating pipes and containers using this. The outer circumference of the tube and/or the container is covered with a plate-like material, and the pressure-resistant and heat-insulating tube with excellent heat resistance is placed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the plate-like material. As a structure in which the outer periphery is covered with a plate-like substance, it is formed on the outer periphery of the pipe and/or container between the surface of the pipe and/or container and the plate-like substance covering the outer periphery A heat insulation layer formed by a space formed by a space, a heat insulation layer composed of a hollow cylindrical substance and gas inside it, a plate-shaped substance covering the outer circumference of a pipe and/or container, and a pipe and/or To form an air insulation layer between a plate-like substance covering the outer periphery of a cylindrical substance placed in a shape such as a spiral and/or a continuous U-shaped tube on the outer periphery of a container. Due to this, the amount of heat possessed by the substance flowing in the pipe and/or the substance inside the container moves from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature, thereby the substance flowing in the pipe and, Alternatively, the pressure-resistant and heat-insulating pipe and the pipe using the same according to claim 1, claim 3, or claim 5, characterized in that it has a function of preventing the temperature of the substance inside the container from decreasing. and container insulation. The outer circumference of the tube and/or the container is covered with a plate-like material, and the pressure-resistant and heat-insulating tube with excellent heat resistance is placed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the plate-like material. As a structure in which the outer periphery is covered with a plate-like substance, it is formed on the outer periphery of the pipe and/or container between the surface of the pipe and/or container and the plate-like substance covering the outer periphery A heat insulation layer formed by a space formed by a space, a heat insulation layer composed of a hollow cylindrical substance and gas inside it, a plate-shaped substance covering the outer circumference of a pipe and/or container, and a pipe and/or It is said that an air insulation layer is formed between a plate-like substance covering the outer circumference of a cylindrical substance placed in a shape such as a spiral or continuous U-tube on the outer periphery of the container. By using the method, the amount of heat carried by the material flowing through the tube and/or the material inside the vessel is transferred from the surface of the tube and/or vessel where the temperature is higher to the surroundings where the temperature is lower, thereby causing the tube to flow. The pressure-resistant and heat-insulating pipe according to claim 1, claim 3, or claim 5, characterized in that it has a function of preventing the temperature of the substance inside the container from decreasing. A method of insulating pipes and vessels using The outer circumference of the tube and/or the container is covered with a plate-like material, and the pressure-resistant and heat-insulating tube with excellent heat resistance is placed in a spiral shape and/or a continuous U-shaped tube shape on the outer periphery of the plate-like material. A plate-like substance is installed, and its outer periphery is covered with a plate-like substance, and the outer periphery of the pipe and/or container is covered with a plate-like substance and a spiral and/or continuous U-shape on the outer periphery of the pipe and/or container. By closing both ends of a space composed of a plate-shaped substance covering the outer periphery of a cylindrical substance installed in a tubular shape, etc. to form a sealed space, and by evacuating this space, a tube and/or a container A heat insulating layer formed by a space filled with a gas having a pressure higher than the atmospheric pressure formed between the surface of the pipe and/or container and the plate-shaped material covering the outer periphery of the , a heat insulating layer composed of a hollow cylindrical substance and gas inside it, a plate-shaped substance covering the outer periphery of the pipe and/or container, and a spiral shape on the outer periphery of the pipe and/or container, and Or a substance that flows in a pipe by forming a heat insulating layer with a vacuum sealed space formed between a plate-like substance that covers the outer circumference of a cylindrical substance that is installed in a shape such as a continuous U-shaped tube, and , or the temperature of a substance flowing in a tube and/or a substance inside a container due to the transfer of the amount of heat possessed by the substance inside the container from the surface of the pipe and/or container where the temperature is higher to the surroundings where the temperature is lower The pressure-resistant and heat-insulating pipe and the heat insulation of the pipe and container using the same according to claim 1, claim 3, claim 5, or claim 7, characterized in that it has a function of preventing the decrease in Device. The outer circumference of the pipe and/or container is covered with a plate-like substance, and a pressure-resistant and heat-insulating pipe with excellent heat resistance is installed around the outer circumference of the plate-like substance, and the outer circumference of the pipe and/or container is helically shaped. and/or a plate-like substance covering the outer periphery of a cylindrical substance installed in a shape such as a continuous U-tube shape with a plate-like substance, and covering the outer periphery of the pipe and/or container, the pipe and or a plate-shaped substance covering the outer periphery of a cylindrical substance placed in a shape such as a spiral and/or a continuous U-shaped tube on the outer periphery of the container, and a closed space by closing both ends of the space and by evacuating this space, the outer circumference of the tube and/or container will have a pressure higher than the atmospheric pressure formed between the surface of the pipe and/or container and the plate-like substance covering the outer circumference. A heat insulating layer formed by a space filled with a gas with a pressure of , a heat insulating layer consisting of a hollow cylindrical substance and the gas inside it, a plate-shaped covering the outer circumference of a tube and/or container A vacuum formed between a substance and a plate-shaped substance covering the outer periphery of a cylindrical substance placed in a shape such as a spiral and/or continuous U-shaped tube on the outer periphery of a tube and/or container. By using the method of forming a heat insulating layer with a closed space, the amount of heat held by the substance flowing in the pipe and/or the substance inside the container is transferred from the surface of the pipe and/or container with a high temperature to the surroundings with a low temperature. 2, 4, 6 or A pressure-resistant and heat-insulating tube according to claim 8 and a method of insulating a tube and a container using the same.

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