JP2001041390A - Vacuum heat insulating pipe for fluid transporting piping, and piping supporting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a quantity of heat invaded from a vacuum partition part, and a diffused heat quantity with a simple constitution, improve a manufacture efficiency, and reduce costs of manufacture by covering the vacuum partition part of an end part side for forming a vacuum heat insulating layer being disposed adjacent to a vacuum heat insulating layer arranged on an outer peripheral part of an inner pipe for transporting a fluid with a thermal insulating material. SOLUTION: An outer peripheral edge of an annular partition plate 3a which is positioned nearly inward from an end edge of an inner pipe 1 and which is joined in a sealing condition by means of welding and the like with its outer peripheral surface, is joined with a circumference of an end edge of an outer pipe 2 in a sealing condition. If necessary, a radiating heat insulating material and a getter material are housed into a tightly closed space 5 as a vacuum heat insulating layer 4 by forming with the outer pipe 2 and the vacuum partition part 3 on an outer peripheral part of the inner pipe 1. The surface of the vacuum partition part 3 and an outer peripheral surface of an end part of the outer pipe 2 in an outer periphery of the joining part 6 of the inner pipe 1 are covered with a thermal insulating material 7. The vacuum partition part 3 is covered, and conducing a solid and transferring heat are suppressed, and thereby, a quantity of heat invaded from the vacuum partition part 3 and a radiating heat quantity can be reduced with a simple structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to various types of pipes from cryogenic fluids to high-temperature fluids, such as district cooling / heating pipes, anti-freezing pipes, high-temperature water / steam pipes, hot-water supply pipes, and high-temperature gas transport pipes. The present invention relates to a vacuum insulated pipe for a fluid transport pipe used for transporting a fluid and a method for supporting the pipe.

[0002]

2. Description of the Related Art Vacuum heat insulating tubes suppress the convective heat transfer of gas molecules by placing the heat insulating layer in a vacuum state, and radiate heat to aluminum foil,
High insulation performance is obtained by shielding with an aluminum vapor-deposited film or the like, and it is widely used for transporting cryogenic fluids such as liquefied gas. Vacuum insulated pipes need to partition the vacuum space either structurally for connection to equipment or for prefabricated piping, and the solid conductive heat generated in the vacuum partition is very large. The problem is how to control the amount of heat that enters and dissipates heat therefrom.

Conventionally, in order to reduce heat loss from a vacuum partition of a vacuum insulated tube, one example is disclosed in
As described in 192198, bayonet joints have been used. Further, as other conventional examples, JP-A-8-338591, JP-A-11-12
As described in Japanese Patent No. 5390, the inner pipe and the outer pipe are closed at their ends with a partition plate and a partition pipe or a partition bellow so that the solid conductive heat transfer length of the vacuum partition section is increased. A configuration is known in which the amount of heat entering from the outside and the amount of heat dissipated from the inside to the outside are suppressed, and a sleeve is attached to the outer peripheral portion of the vacuum partition portion in a closed state to make the inside thereof a vacuum state.

[0004]

However, among the conventional examples, in the former configuration using the bayonet joint, there is a restriction on the pipe diameter that can be adopted due to the configuration, and the inner diameter generally exceeds 60 mm. In such a case, it cannot be adopted, and the outer diameter increases due to the flange connection. In addition, the insertion length of the uneven portion provided in the partition portion is 15
Since it is as long as 0 mm to 300 mm, it cannot be attached or detached unless it is always moved in the axial direction by the insertion length at the time of piping construction or disassembly, resulting in poor workability in a narrow place. In particular, even when a part of the pipe is replaced, the pipe must be entirely disassembled. In order to avoid this, there is a problem in construction, such as a long flexible pipe must be provided in the piping line.

On the other hand, the latter configuration can solve the problems of the pipe diameter and construction as in the former.
However, since the vacuum chamber is formed outside the vacuum partition, the mounting accuracy of the sleeve is required, and the manufacturing cost is increased.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems. It is an object of the present invention to reduce the amount of heat entering and dissipating heat from a vacuum partition with a simple structure and a simple operation. Vacuum insulated pipe for fluid transport piping capable of improving manufacturing efficiency and reducing manufacturing cost, and method of supporting vacuum insulated pipe for fluid transport piping capable of reducing piping cost It is intended to provide.

[0007]

According to a first aspect of the present invention, there is provided a vacuum heat insulating pipe for a fluid transport pipe, wherein a vacuum heat insulating layer is provided on an outer peripheral portion of an inner pipe for transporting a fluid. A thermal insulating material is attached so as to cover the vacuum partition on the end side forming the layer.

In the above structure, the vacuum heat insulating layer is partitioned by the inner tube, the outer tube arranged on the outer periphery of the inner tube, and the vacuum partition connecting the inner tube and the outer tube. And the thermal insulating material can be attached to the outside of the vacuum partition. In this case, it is preferable that the above-mentioned thermal insulating material is covered with a protective exterior material. Further, the vacuum partition can be formed of a plate-like portion perpendicular to the axis of the inner tube and the outer tube, and a tubular portion having the axis of the inner tube and the outer tube as the axis. In addition, it is preferable to provide a corrugated portion on the vacuum partition side of the outer tube and cover this corrugated portion with a thermal insulating material.

The vacuum heat insulating layer has a vacuum heat insulating layer which is disposed in a loose state on the outer peripheral portion of the inner tube, and has an inner tube, an outer tube, and a vacuum partition portion which closes an end portion between the inner tube and the outer tube. It can be formed by a tube, and the thermal insulating material can be mounted on the outer side of the vacuum partition. Further, the thermal insulating material is mounted between the inner side of the vacuum partition and the outer peripheral surface of the inner tube. be able to. In this case, it is preferable to cover the external thermal insulating material with a protective exterior material. In addition, a heat transfer suppressing separation member can be interposed between the inner tube and the vacuum insulation tube. Further, the vacuum partition portion can be formed of a plate-like portion perpendicular to the axis of the inner cylinder and the outer cylinder, and a cylindrical portion having the axis of the inner cylinder and the outer cylinder as the axis. . Preferably, a corrugated portion is provided on at least one of the outer cylinder and the inner cylinder on the side of the vacuum partition, and the corrugated portion is preferably covered with a thermal insulating material. Further, a vacuum heat insulating material can be used as the thermal insulating material.

Further, according to the pipe supporting method of the present invention, a vacuum heat insulating layer is provided on an outer peripheral portion of an inner pipe for transporting a fluid, and at least one of the vacuum partition portions on the end side forming the adjacent vacuum heat insulating layer. The outer thermal insulating material is used as a pipe support for piping of a vacuum insulated pipe for a fluid transport pipe in which a thermal insulating material is mounted so as to cover the outer side.

[0011] According to the vacuum insulation pipe for a fluid transport pipe of the present invention configured as described above, a thermal insulating material is attached so as to cover the vacuum partition and the solid conduction heat transfer from the vacuum partition is conducted. Since this is suppressed, the amount of heat entering and radiating from the vacuum partition can be reduced with a simple configuration.

Further, according to the method for supporting a vacuum insulation pipe for a fluid transportation pipe of the present invention configured as described above, the outer thermal insulating material is used as a pipe support. The function of suppressing the solid conduction heat transfer from the section and the function as the pipe support can be shared.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described. 1 and 2 show a vacuum insulated pipe for a fluid transport pipe according to a first embodiment of the present invention,
1 is a partial longitudinal sectional view, and FIG. 2 is a sectional view taken along the line AA of FIG.

The inner tube 1 and the outer tube 2 are formed in a circular cross section by a desired material such as stainless steel, iron, plastic or the like.
The inner tube 1 and the outer tube 2 are arranged so as to have a uniform space on the circumference on the same axis, and the end of the inner tube 1 protrudes from the outer tube 2. The end of the inner tube 1 and the end of the outer tube 1 are closed by a vacuum partition 3. As the vacuum partition part 3 in the present embodiment, an annular partition plate 3a made of a desired material such as stainless steel, iron, plastic or the like is used, and the inner peripheral edge of the partition plate 3a is slightly inward from the edge of the inner tube 1. And the outer peripheral surface of the partition plate 3a is joined to the periphery of the outer tube 2 in a sealed state by welding or the like. Thus, the inner tube 1
A sealed space 5 that becomes a vacuum heat insulating layer 4 is formed by the outer tube 2 and the vacuum partition 3 on the outer peripheral portion of the device.

Although not shown in the space between the closed spaces 5,
If necessary, a radiant heat insulating material or a getter material such as a film-like, powder-like, or fibrous-like material such as an aluminum vapor-deposited sheet, foam glass, or pearlite is stored. Then, for example, using a suction port (not shown) formed in the outer tube 2, the closed space 5 is used.
After the vacuum pump is evacuated by a vacuum pump, the above-mentioned suction port is closed to form a vacuum heat insulating layer 6.

The inner tube 1 is formed to be relatively thick so as to have sufficient strength to be used for transporting a fluid, and the outer tube 2 is not used for transporting a fluid, and can withstand evacuation and has an external pressure. It is preferably formed to be thin, as long as it can withstand the pressure. Further, the vacuum partition plate 3a is not used for transporting the fluid, and it is sufficient that the vacuum partition plate 3a can withstand vacuum evacuation.

The periphery of the inner pipe 1 is joined in a sealed state by butt welding 6 or the like. A thermal insulating material 7 is attached so as to cover the vacuum partition 3a. In this embodiment, the thermal insulating material 7 is mounted on the outer periphery of the joint 6 of the inner cylinder 1 so as to cover the surface of the vacuum partition 3 and the outer peripheral surface of the end of the outer tube 2. . As the thermal insulating material 7, a continuous foam such as polyurethane, porstyrene, or the like;
A powdery material of a gaseous material such as white carbon, silica fume, pearlite, and glass foam, and a fibrous material such as glass wool, alumina fiber, and silica fiber can be used. Continuous foams can be used as they are or packaged in an outer packaging material, and powdery or fibrous materials can be used as molded products or used in an outer packaging material, and packed in an outer packaging material. When used as a package, a heat-sealing polymer film with low gas permeability such as an aluminum laminated film or an aluminum vapor-deposited film is used for the outer packaging material, and the inside is evacuated to a vacuum state to seal the vacuum insulation. By making it a material,
A better heat insulating effect can be obtained.

An exterior material 8 is provided so as to cover the thermal insulating material 7. The exterior material 8 is provided to protect the thermal insulating material 7 from external factors such as physical impact, intrusion of moisture, and the like. Used selectively. The exterior material 8 in the present embodiment is composed of a cylindrical body 8a and annular end plates 8b connected to both ends of the cylindrical body 8a, and the inner peripheral edge of the end plate 8b is welded to the outer peripheral surface of the outer tube 2 by welding or the like. Are joined.

The vacuum heat insulating pipe for a fluid transport pipe having the above-described structure includes:
As an example, a unit is formed into a unit having a desired length, manufactured in a factory or the like, transported to a construction site, and sequentially connected in a sealed state to perform piping. Alternatively, the pipes are sequentially connected and sealed while being manufactured at the construction site.
Then, the fluid is transported using the inside of the inner tube 1. At this time, the heat transfer (penetration heat, radiated heat) is suppressed by the vacuum heat insulating layer 4 on the outer peripheral portion of the inner tube 1, and the solid conductive heat transfer (penetration heat, radiated heat) from the vacuum partition 3 is controlled by the thermal insulating material 7. ) Can be suppressed. Further, the heat transfer area is reduced by forming the vacuum partition 3 as thin as described above, and the length x between the inner pipe 1 and the outer pipe 2 in the vacuum partition 3 and the vacuum partition in the outer pipe 2 By setting the length y from the joint with the part 3 to the joint with the exterior material 8 to be longer, the solid conduction heat transfer from the vacuum partition 3 can be further suppressed. Therefore, it is possible to maintain the heat insulating effect on the fluid transported in the inner tube 1, reduce the heat loss of the fluid, and keep the temperature of the fluid substantially constant.

According to the vacuum insulation pipe for a fluid transport pipe of the present embodiment configured as described above, since it does not have an uneven insertion portion, it can be applied to any pipe diameter and the versatility is improved. In addition, piping can be performed even in a narrow place, and the workability can be improved. In addition, since the thermal insulating material 7 is attached so as to cover the vacuum partition 3 so as to suppress the solid conduction heat transfer from the vacuum partition 3, a simple configuration and a simple operation can be used. The amount of heat entering and radiating heat from the vacuum partition 3 can be reduced, so that the manufacturing efficiency can be improved and the manufacturing cost can be reduced.

Next, a second embodiment of the present invention will be described. FIG. 3 is a partial longitudinal sectional view showing a vacuum insulation pipe for a fluid transport pipe according to a second embodiment of the present invention.

In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 3, the vacuum partition part 3 is composed of annular partition plates 3b, 3c and a partition tube 3d, and the edge of the outer tube 2 is retracted from the edge of the inner tube 1. It is set as follows. The inner peripheral edge of the partition plate 3b is joined to the outer peripheral surface of the inner tube 1 in a sealed state by welding or the like, and the outer peripheral edge of the partition plate 3c is joined to the periphery of the outer tube 2 in a sealed state by welding or the like. Are joined to the outer peripheral edge of the partition plate 3b and the inner peripheral edge of the partition plate 3c in a sealed state by welding or the like. A thermal insulating material 7 is mounted on the outer periphery of the joint 6 of the inner tube 1 so as to cover the surface of the vacuum partition portion 3, and the diameter of the outer peripheral surface of the thermal insulating material 7 is substantially equal to the outer peripheral surface of the outer tube 2. Have been matched. The thermal insulating material 7 is covered with a cylindrical body 8c that is an exterior material 8, and both sides of the cylindrical body 8c protruding from the thermal insulating material 7 are joined to the outer peripheral surface of the outer tube 2 by welding or the like. Have been.

According to the present embodiment, the vacuum partition 3 is composed of the partition plates 3b, 3c and the partition tube 3d, and the distance from the inner tube 1 to the outer tube 2 becomes longer. Solid conduction heat transfer can be more effectively suppressed, and the heat insulation effect can be improved. In addition, it is possible to prevent the thermal insulation 7 from protruding outward so as not to obstruct the piping, and to improve the appearance.

Next, a third embodiment of the present invention will be described. FIG. 4 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a third embodiment of the present invention.

In this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 4, the vacuum partition part 3 includes annular partition plates 3b and 3c and a partition tube 3d. The inner peripheral edge of the partition plate 3b is joined to the outer peripheral surface of the inner tube 1 in a sealed state by welding or the like, and the outer peripheral edge of the partition plate 3c is joined to the periphery of the outer tube 2 in a sealed state by welding or the like. Are joined to the outer peripheral edge of the partition plate 3b and the inner peripheral edge of the partition plate 3c in a sealed state by welding or the like. A thermal insulating material 7 is mounted on the outer periphery of the joint 6 of the inner tube 1 so as to cover the surface of the vacuum partition 3 and the outer peripheral surface of the end of the outer tube 2. The inner peripheral edge of the end plate 8b is joined to the outer peripheral surface of the outer tube 2 by welding or the like.

According to the present embodiment, the vacuum partition 3 is composed of the partition plates 3b, 3c and the partition tube 3d, and the distance from the inner tube 1 to the outer tube 2 becomes longer. Solid conductive heat transfer can be more effectively suppressed, and the thermal insulating material 7 extends to the outer periphery of the end of the outer tube 2 and is formed thicker, so that the heat insulating effect is further improved. Can be done.

Next, a fourth embodiment of the present invention will be described. FIG. 5 is a partial longitudinal sectional view showing a vacuum insulated pipe for a fluid transport pipe according to a fourth embodiment of the present invention.

In this embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 5, the vacuum partition part 3 is formed of an annular partition plate 3a. On the other hand, a corrugated portion 9 is formed at the end of the outer tube 2, or the corrugated portion 9 is joined by welding or the like. The inner peripheral edge of the partition plate 3a is joined to the outer peripheral surface of the inner pipe 1 in a sealed state by welding or the like, and the outer peripheral edge of the partition plate 3a is joined to the periphery of the end edge of the corrugated portion 9 in a sealed state by welding or the like. . A thermal insulating material 7 is mounted on the outer periphery of the joint 6 of the inner tube 1 so as to cover the surfaces of the vacuum partition 3 and the corrugated portion 9. , End plate 8
b, and the inner peripheral edge of the end plate 8b is joined to the outer peripheral surface of the outer tube 2 by welding or the like.

According to this embodiment, by providing the corrugated portion 9, the heat transfer distance can be lengthened, and the strength can be maintained even when the thickness is reduced. The area can be reduced, and thus the heat insulating effect can be further improved.

Next, a fifth embodiment of the present invention will be described. 6 and 7 show a vacuum insulated pipe for a fluid transport pipe according to a fifth embodiment of the present invention. FIG. 6 is a partial longitudinal sectional view, and FIG. 7 is a sectional view taken along line BB of FIG. is there.

As shown in FIGS. 6 and 7, the inner tube 1 is formed in a circular cross section by a desired material such as stainless steel, iron or plastic. The vacuum insulation tube 10 is made of stainless steel, carbon steel, aluminum, plastic, or the like,
The inner cylinder 11 and the outer cylinder 12 are arranged concentrically in a circular cross section,
The inner peripheral edge and the outer peripheral edge of an annular partition plate 13a, which is a vacuum partition portion 13 made of stainless steel, carbon steel, aluminum, plastic, or the like, are sealed by welding or the like around both edges of the inner cylinder 11 and the outer cylinder 12. Joined inner cylinder 1
Between the outer cylinder 12 and the outer cylinder 12 in a circular cross section.
4 are formed. Although not shown, the closed space 14
A getter material and a radiation heat insulating material similar to those described above are provided therein as necessary. Then, for example, after the closed space 14 is evacuated by a vacuum pump using a suction port (not shown) formed in the outer cylinder 12, the vacuum heat insulating layer 15 is formed by closing the suction port. ing.

The inner tube 1 is formed to be relatively thick so as to have sufficient strength to be used for transporting a fluid. Since the vacuum heat insulating cylinder 10 is not used for transporting the fluid, and only needs to be able to withstand vacuum evacuation, the inner cylinder 11, the outer cylinder 12, and the partition plate 13a as the vacuum partition 13 are preferably formed to be thin. Therefore, since the heating property at the time of heating at the time of vacuuming is excellent and it is possible to sufficiently degas the constituent materials of the inner cylinder 11, the outer cylinder 11 and the end plate 13, the closed space 14, that is, the vacuum heat insulating layer 15 The degree of vacuum can be increased.

The periphery of the inner pipe 1 is joined in a sealed state by butt welding 6 or the like. A spiral linear spacer 16 is wound around the outer peripheral surface of the inner tube 1 as an example of a heat transfer suppressing separating member, and the vacuum heat insulating tube 10 is fitted around the inner tube 1 via the spacer 16 in a loose state. And
The partition plate 13a at the end of the vacuum insulation tube 10 is abutted. The outer peripheral surface of the inner tube 1 and the inner peripheral surface of the vacuum insulation tube 10 are separated by an air layer 17 formed by a spiral linear spacer 16 interposed therebetween so as to suppress heat transfer, and are separated from the inner tube 1. Since it is independent of the vacuum insulation tube 10, relative movement in the axial direction is allowed. Both ends of the air layer 17 are closed by appropriate means.
As described above, in the present embodiment, the vacuum heat insulating layer 15 is provided on the outer peripheral portion of the inner tube 1 via the air layer 17.

A thermal insulating material 7 made of the same material as in the first embodiment is mounted on the outer peripheral surfaces of both ends of the outer cylinder 12 of the vacuum heat insulating cylinder 10 so as to cover the vacuum partition plate 13a. The material 7 is covered with a tubular body 8a and an end plate 8b, which are the same exterior materials 8 as in the first embodiment, and the inner peripheral edge of the end plate 8b is welded to the outer peripheral surface of the outer cylinder 12 of the vacuum insulation tube 10. It is joined by.

The vacuum heat insulating pipe for a fluid transport pipe having the above structure is
As an example, as in the first embodiment, as an example, a unit having a desired length is manufactured in a factory or the like, which is transported to a construction site, and sequentially connected in a sealed state to perform piping. Alternatively, the pipes are sequentially connected and sealed while being manufactured at the construction site. Then, the fluid is transported using the inside of the inner tube 1. At this time, the heat transfer (penetration heat and heat dissipation) is suppressed by the vacuum heat insulating layer 15 on the outer peripheral portion of the inner tube 1, and the solid conductive heat transfer (penetration heat and heat dissipation) from the vacuum partition 13 is controlled by the thermal insulating material 7. ) Can be suppressed. Further, as described above, the vacuum partition 13 is formed to be thin to reduce the heat transfer area, and the length between the inner cylinder 11 and the outer cylinder 12 in the vacuum partition 13 and the vacuum partition 13 in the outer cylinder 12 are reduced. By setting such that the length from the joint with the outer material 8 to the joint with the exterior material 8 is longer, the solid conduction heat transfer from the vacuum partition 13 can be further suppressed. Therefore, it is possible to maintain the heat insulating effect on the fluid transported in the inner tube 1, reduce the heat loss of the fluid, and keep the temperature of the fluid substantially constant.

Further, as described above, the vacuum insulation tube 10 is made independent of the inner tube 1 used for fluid transport, and the inner tube 1 and the vacuum insulation tube 10 are relatively movable in the axial direction.
The spacers 16 are also brought into linear contact with both to reduce the frictional resistance. Therefore, the vacuum insulated cylinder 10 can be freely and smoothly moved and absorbed with respect to the inner pipe 1 during thermal expansion and contraction accompanying the fluid transport of the inner pipe 1.
Further, an air layer 1 provided with an inner tube 1 for transporting a fluid and a vacuum heat insulating cylinder 10 outside the inner tube 1 with a spacer 16 interposed therebetween.
7 so that the heat transfer can be suppressed.
6, the heat transfer to the vacuum heat insulating cylinder 10 by the transport fluid can be suppressed to a small extent, since the heat transfer to the vacuum heat insulating cylinder 10 can be suppressed to a small extent by contacting the two linearly. Further, even if the outer cylinder 12 of the vacuum heat insulating cylinder 10 is damaged due to collision of another object or the like and loses the heat insulating effect, even if the inner pipe 1 and the inner cylinder 1 of the vacuum heat insulating cylinder 10 are damaged.
1 can maintain a certain heat insulating effect by the air layer 17 provided therebetween, and the heat insulating effect is not immediately lost.
Repair, replacement, etc. of 0 can be performed.

According to the vacuum insulated pipe for fluid transport piping of the present embodiment configured as described above, since it does not have an uneven insertion portion, it can be applied to an arbitrary pipe diameter and versatility is improved. In addition, piping can be performed even in a narrow place, and the workability can be improved. Further, since the thermal insulating material 7 is attached so as to cover the vacuum partition 13 so as to suppress the solid conduction heat transfer from the vacuum partition 13, a simple configuration and a simple operation can be used. The amount of heat entering and radiating heat from the vacuum partition 13 can be reduced, so that the production efficiency can be improved and the production cost can be reduced.

Further, since the inner tube 1 and the vacuum insulation tube 10 are relatively movable in the axial direction, the vacuum insulation tube 10 can be freely moved with respect to the inner tube 1 when the inner tube 1 expands and contracts to absorb the heat. can do. Therefore, both the effective absorption of thermal expansion and contraction and the heat insulating effect can be satisfied simultaneously. In addition, by transporting a fluid using the inside of the inner tube 1 provided inside the vacuum insulating tube 10 independently of the vacuum insulation tube 10, the inner tube 1 is formed to have a thickness necessary for transporting the fluid, thereby increasing strength. The inner tube 11, the outer tube 12, and the vacuum partition plate 13 of the vacuum heat insulating tube 10 to be held and not used for transporting fluid.
Since a can be formed to be thin, the heating property at the time of vacuuming becomes good, sufficient degassing can be performed, and the vacuum can be evacuated in a relatively short time. By reducing the area, solid conduction heat transfer can be effectively suppressed. Therefore, it is possible to efficiently manufacture the vacuum heat insulating cylinder 10 having an excellent heat insulating effect.
The heat insulation effect can be improved. Further, the inner tube 1 for transporting the fluid and the vacuum insulation tube 10 outside the inner tube 1 are
6 and the like, so that heat transfer can be suppressed by the heat insulation suppressing separation member, heat transfer to the vacuum heat insulating cylinder 10 can be reduced by the transport fluid, and gas emission into the vacuum heat insulating layer 15 can be reduced. can do. Therefore, the heat insulation performance can be maintained for a long time, and as a result, the cost of the piping system can be reduced.

Next, a sixth embodiment of the present invention will be described. FIG. 8 is a partial longitudinal sectional view showing a vacuum insulation pipe for a fluid transport pipe according to a sixth embodiment of the present invention.

In the present embodiment, the same parts as those in the fifth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 8, the outer peripheral surface of the inner tube 1 and the inner peripheral surfaces of both ends of the inner tube 11 of the vacuum heat insulating tube are similar to the above so as to cover the inside of the vacuum partition portion 13 as well. A thermal insulating material 18 made of a material is mounted so as to be substantially cylindrical. In the present embodiment, since the air layer 17 can be formed in the tube between the inner tube 1 and the vacuum heat insulating tube 10 by the thermal insulating material 18, the spacer 16 may be omitted.

According to the present embodiment, not only the outer side but also the inner side of the vacuum partition 13 is covered with the thermal insulating material 18, so that the heat insulating effect can be further improved.

Next, a seventh embodiment of the present invention will be described. FIG. 9 is a partial longitudinal sectional view showing a vacuum insulated pipe for a fluid transport pipe according to a seventh embodiment of the present invention.

In the present embodiment, the same parts as those in the fifth embodiment are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 9, the vacuum partition portion 13 includes annular partition plates 13 b and 13 c and a partition tube 13 d, and the edge of the inner tube 11 is retracted from the edge of the outer tube 12. It is set as follows. The outer peripheral edge of the partition plate 13b is joined to the periphery of the outer cylinder 12 in a sealed state by welding or the like,
The inner peripheral edge of the partition plate 13c is joined to the periphery of the inner tube 11 in a sealed state by welding or the like, and the periphery of both ends of the partition tube 13d is welded to the inner peripheral edge of the partition plate 13b and the outer peripheral edge of the partition plate 13c. Joined in a sealed state. A thermal insulating material 18 is attached so as to cover the outer peripheral surface of the inner tube 1 and the surface of the vacuum partition 13. Also in the present embodiment, the air layer 17 can be formed between the inner tube 1 and the vacuum heat insulating cylinder 10 by the thermal insulating material 18, so that the spacer 16 is not required.

According to the present embodiment, since the vacuum partition 13 is composed of the partition plates 13b and 13c and the partition tube 13d, the distance is long, and the vacuum partition 13 is covered with the thermal insulating material 18. Solid conduction heat transfer from the portion 13 can be more effectively suppressed, and the heat insulation effect can be improved.

Next, a pipe supporting method according to an embodiment of the present invention will be described. 10 and 11 show a pipe supporting method according to an embodiment of the present invention. FIG. 10 is a partial longitudinal sectional view, and FIG. 11 is a sectional view taken along line CC of FIG.

In this embodiment, a vacuum insulated pipe for a fluid transport pipe having basically the same configuration as the vacuum insulated pipe for a fluid transport pipe shown in the seventh embodiment shown in FIG. 9 is used. Regarding the vacuum heat insulating pipe for transport piping, the same parts as those in the above-described seventh embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG.
As shown in FIG. 11 and FIG. 11, the vacuum insulation pipe for the fluid transport pipe used in the present embodiment has a semi-circular upper part in the cross section when the outer shape of the thermal insulation material 7 covering the outer side of the vacuum partition part 13 is formed. The semi-circular portion has a side surface parallel to the side, and is formed to have a flat surface at the lower end. On the other hand, a portion 8c of the exterior material 8 covering a surface parallel to the axis of the thermal insulating material 7 has a semicircular portion at the top in the cross section, and is parallel to the side following the semicircular portion. Has sides,
A lower end is opened, and a mounting portion 8d protruding laterally is integrally provided at a lower end edge of both side surfaces, and a portion 8e covering an end surface in a direction perpendicular to the axis of the thermal insulating material 7 has the same shape as the end surface. It is formed in an end plate shape. And the exterior material 8 is made of the thermal insulating material 7
Is set so that the flat surface at the lower end of the thermal insulating material 7 and the lower surface of the mounting portion 8d of the exterior material 8 are substantially flush with each other.

In order to support the above-mentioned vacuum insulation pipe for fluid transport piping, for example, the bottom plate 23 of the support base 22 is fixed to the foundation 21 of the building with the foundation bolts 24. Then, the flat surface of the thermal insulating material 7 and the mounting portion 8d of the exterior material 8 in the vacuum insulated pipe for fluid transport piping are placed on the support plate 25 at the upper end of the support base 23, and the mounting portion 8d is mounted on the support plate 25. It is fixed with bolts 26 and nuts 27 using the formed mounting holes.

By using the thermal insulating material 7 as a pipe support as described above, the function of suppressing the solid conductive heat transfer from the vacuum partition portion 13 and the function of the pipe support can be used, and the cost of the pipe can be reduced. Can be achieved.

In each of the above embodiments, a straight tube-shaped vacuum heat insulating tube is shown, but the present invention can be applied to a case where the tube is formed in a curved tube such as an L-shape or a branched shape such as a T-shape. Further, even when the vacuum heat insulating layer 15 is provided on the outer peripheral portion of the inner tube 1 by the vacuum heat insulating tube 10 as in the fifth to seventh embodiments, the vacuum partitioning part 13 is not connected to the first to the fourth.
In the case where the corrugated portion 9 is provided as in the above-described fourth embodiment, it is formed on both the inner tube 11 and the outer tube 12 or one of them. can do. Further, the corrugated portion can be used for the cylindrical portion of the vacuum partition portion instead of being provided on the outer tube 2, the inner tube 11, and the outer tube 12. In addition, the fifth
In the embodiment, the spacer 16 may not be provided between the inner pipe 1 and the vacuum heat insulating cylinder 10. Further, if the thermal insulating material 7 is configured to have a certain degree of strength, the exterior material 8 may not be provided. In the sixth and seventh embodiments, a plurality of inner tubes 1 can be arranged in parallel and held by the thermal insulating material 18. Further, in each of the above embodiments, the vacuum heat insulating layer may be provided in a plurality of layers. Further, in each of the above embodiments, the heat insulating performance can be further improved by forming the vacuum partition portions in the adjacent vacuum heat insulating layer portions in an uneven shape and inserting them into each other. In this case, the vacuum partition portion Is covered with a thermal insulating material, so that if the performance is the same, the insertion length can be shortened, and piping work in a narrow place can be easily performed. Further, in the pipe support method of the above embodiment, the case where the present invention is applied to the support of the vacuum adiabatic pipe for the fluid transport pipe according to the seventh embodiment has been described.
Also, the present invention can be applied to the support of a vacuum insulation pipe for a fluid transport pipe according to the sixth embodiment. Further, the vacuum insulated pipe for the fluid transport pipe can be supported by being suspended from above on the ceiling or the like by using the thermal insulating material 7, or can be supported on the wall or the like from the side. In addition, the present invention can be variously modified without departing from the basic technical concept thereof.

[0050]

As described above, according to the vacuum heat insulating pipe for a fluid transport pipe of the present invention, a thermal insulating material is attached so as to cover the vacuum partition and the solid conductive heat transfer from the vacuum partition is conducted. Since the amount of heat is suppressed, the amount of heat entering and radiating heat from the vacuum partition can be reduced with a simple configuration, and therefore, an improvement in manufacturing efficiency and a reduction in manufacturing cost can be achieved.

Further, according to the method for supporting a vacuum heat insulating pipe for a fluid transport pipe of the present invention, since the outer thermal insulating material is used as the pipe support, the solid conductive heat transfer from the vacuum partition portion is performed. And the function as a pipe support can be shared. Therefore, piping costs can be reduced.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a first embodiment of the present invention.

FIG. 2 shows a vacuum insulation pipe for the fluid transport pipe,
It is sectional drawing in the -A arrow direction.

FIG. 3 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a second embodiment of the present invention.

FIG. 4 is a partial longitudinal sectional view showing a vacuum insulated pipe for a fluid transport pipe according to a third embodiment of the present invention.

FIG. 5 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a fourth embodiment of the present invention.

FIG. 6 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a fifth embodiment of the present invention.

FIG. 7 shows a vacuum insulation pipe for the fluid transport pipe, and FIG.
FIG.

FIG. 8 is a partial longitudinal sectional view showing a vacuum heat insulating pipe for a fluid transport pipe according to a sixth embodiment of the present invention.

FIG. 9 is a partial longitudinal sectional view showing a vacuum insulated pipe for a fluid transport pipe according to a seventh embodiment of the present invention.

FIG. 10 is a partial longitudinal sectional view showing a method of supporting a vacuum insulation pipe for a fluid transport pipe according to an embodiment of the present invention.

FIG. 11 is a cross-sectional view taken along the line CC of FIG. 10 showing the same pipe supporting method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner pipe 2 Outer pipe 3 Vacuum partition part 4 Vacuum heat insulating layer 7 Thermal insulating material 8 Exterior material 9 Corrugated part 10 Vacuum heat insulating cylinder 11 Inner cylinder 12 Outer cylinder 13 Vacuum partition part 15 Vacuum heat insulating layer 16 Spacer (for heat transfer suppression) (Separation member) 18 Thermal insulation material 22 Support base

Claims (13)

[Claims] 1. A vacuum heat insulating layer is provided on an outer peripheral portion of an inner pipe for transporting a fluid, and a heat insulating material is provided so as to cover a vacuum partition on an end portion forming an adjacent vacuum heat insulating layer. Vacuum insulation tube for installed fluid transport piping. 2. A vacuum heat-insulating layer is formed by being partitioned by an inner tube, an outer tube disposed on an outer peripheral portion of the inner tube, and a vacuum partition portion connecting the inner tube and the outer tube, The vacuum heat insulating pipe for a fluid transport pipe according to claim 1, wherein a thermal insulating material is mounted on an outer side of the vacuum partition. 3. The vacuum heat insulating pipe for a fluid transport pipe according to claim 2, wherein the thermal insulating material is covered with a protective exterior material. 4. The vacuum partition has a plate-like portion perpendicular to the axis of the inner tube and the outer tube, and a cylindrical portion having the axis of the inner tube and the outer tube as the axis. 4. The vacuum heat insulating pipe for a fluid transport pipe according to any one of 1 to 3. 5. The vacuum heat insulating pipe for a fluid transport pipe according to claim 1, wherein a corrugated portion is provided on a vacuum partition side of the outer tube, and the corrugated portion is coated with a thermal insulating material. 6. A vacuum heat insulating cylinder, wherein a vacuum heat insulating layer is disposed in a loose state on an outer peripheral portion of the inner pipe, and has an inner cylinder, an outer cylinder, and a vacuum partition for closing an end between the inner cylinder and the outer cylinder. 2. The vacuum heat insulating pipe for a fluid transport pipe according to claim 1, wherein said heat insulating material is formed outside said vacuum partition. 7. The vacuum heat insulating pipe for a fluid transport pipe according to claim 6, wherein the thermal insulating material is mounted between the inside of the vacuum partition and the outer peripheral surface of the inner pipe. 8. The vacuum heat insulating pipe for a fluid transport pipe according to claim 6, wherein the thermal insulating material on the outer side is covered with a protective outer material. 9. The vacuum heat insulating pipe for a fluid transport pipe according to claim 6, wherein a heat transfer suppressing separation member is interposed between the inner pipe and the vacuum heat insulating cylinder. 10. The vacuum partition has a plate-like portion perpendicular to the axis of the inner cylinder and the outer cylinder, and a cylindrical portion having the axis of the inner cylinder and the outer cylinder as the axis. 10. A vacuum insulation pipe for a fluid transport pipe according to any one of 6 to 9. 11. The fluid transport according to claim 6, wherein a corrugated portion is provided on at least one of the outer cylinder and the inner cylinder on the side of the vacuum partition, and the corrugated portion is covered with a thermal insulating material. Vacuum insulation tube for piping. 12. The vacuum heat insulating pipe for a fluid transport pipe according to claim 1, wherein the thermal insulating material is a vacuum heat insulating material. 13. A vacuum heat insulating layer is provided on an outer peripheral portion of an inner pipe for transporting a fluid, and heat is applied so as to cover at least an outer side of an end-side vacuum partition portion forming an adjacent vacuum heat insulating layer. A method for supporting a vacuum insulation pipe for a fluid transportation pipe, wherein the outer thermal insulation material is used as a pipe support when piping the vacuum insulation pipe for a fluid transportation pipe to which a thermal insulation material is attached.