JP7617764B2 - Flexible pipe for transporting fluid and method for repairing flexible pipe for transporting fluid - Google Patents

Description

The present invention relates to a flexible tube for transporting fluids, for example, when transporting fluids such as liquefied gas at extremely low temperatures, and a method for repairing the flexible tube for transporting fluids.

Currently, in order to respond to greenhouse gas reduction and emission regulations, there is a need for technologies to transport liquefied carbon dioxide and to send liquid ammonia, liquid hydrogen, and other fuels. Such low-temperature liquids are transported, for example, between moving bodies such as ships. In these cases, flexible pipes for transporting fluids that are flexible, easy to handle, and have thermal insulation properties are required.

As a flexible pipe for transporting such low-temperature fluids, a flexible pipe for transporting fluids has been proposed that has a flexible inner pipe, a reinforcing layer provided on the outer periphery of the inner pipe, an insulating layer provided on the outer periphery of the reinforcing layer, a buffer layer provided on the outer periphery of the insulating layer, and a protective layer provided on the outermost periphery (Patent Document 1).

JP 2019-168027 A

Such a flexible tube for transporting fluid has a terminal structure at the end that can be connected to another connection part. Figure 10 is a diagram showing the end structure of a conventional flexible tube for transporting fluid 100. The flexible tube for transporting fluid 100 has an inner layer 107, a heat insulating layer 111 arranged on the outer periphery of the inner layer 107, and an outer layer 117 arranged on the outer periphery of the heat insulating layer 111.

The inner layer 107 is composed of the innermost flexible tube 103, a resin layer 105 arranged on the outer periphery of the flexible tube 103, and a reinforcing layer 109 arranged on the outer periphery of the resin layer 105. The flexible tube 103 is, for example, a flexible tube such as an interlock tube. The resin layer 105 blocks the fluid flowing inside the flexible tube 103. The reinforcing layer 109 is a layer for reinforcing the internal pressure and axial force, and is composed of, for example, a tape made of stainless steel or aramid, a tensile strength member, etc.

The protective layer 113 constituting the outer layer 117 is made of a thermoplastic resin such as polyurethane, and is deformable to conform to the inner layer 107. The insulating layer 111 insulates the fluid in the inner layer 107 from the outside so that the protective layer 113 is not affected by the temperature of the fluid.

At the end of the flexible tube 100 for transporting fluid, the insulating layer 111 and the protective layer 113 on the outer periphery of the inner layer 107 are removed. More specifically, the outer layer 117 and the insulating layer 111 are removed so that the outer layer 117 is shorter than the inner layer 107, and the insulating layer 111 is even shorter than the outer layer 117. That is, a gap is formed between the outer layer 117 and the inner layer 107.

The terminal structure of the flexible tube 100 for transporting fluid uses terminal members 119a and 119b. The terminal member 119a holds and fixes the end of the outer layer 117, and the terminal member 119b holds and fixes the end of the inner layer 107. The terminal member 119b is fixed by sandwiching the inner layer 107 from inside and outside. The terminal member 119a is also fixed by sandwiching the outer layer 117 from inside and outside. Therefore, a part of the terminal member 119a is inserted between the outer layer 117 and the inner layer 107. At this time, a part of the insulating layer 111 inside the outer layer 117 is removed, and a gap is formed between the outer layer 117 and the inner layer 107, so there is no interference between the terminal member 119a and the insulating layer 111.

On the other hand, such a flexible tube 100 for transporting fluid may be damaged during use. For example, the inner layer 107 may be damaged, causing leakage of the liquid inside, or the outer layer 117 may be damaged, making it impossible to provide sufficient protective function. Such damage usually occurs near the terminal structure of the flexible tube 100 for transporting fluid. This is because stress tends to concentrate near the terminal structure.

When the vicinity of the end of the flexible tube 100 for transporting fluid is damaged in this way, repair requires removing the terminal members 119a, 119b, cutting out the damaged portion, and attaching new terminal members 119a, 119b. However, as mentioned above, it is necessary to remove part of the insulating layer 111 between the inner layer 107 and the outer layer 117 at the end of the flexible tube 100 for transporting fluid. However, since the outer layer 117 has a certain level of rigidity, it is not possible to fold it back to expose the internal insulating layer 111. For this reason, it is difficult to cut out and remove a certain range of the insulating layer 111, and it is not easy to repair the terminal structure on site.

The present invention was made in consideration of the above-mentioned problems, and aims to provide a flexible tube for transporting fluids that can be easily connected to a terminal member even on-site.

In order to achieve the above-mentioned object, the first invention is a flexible tube for transporting fluid, comprising an inner layer arranged as the innermost layer, an insulating layer arranged on the outer periphery of the inner layer, and an outer layer arranged on the outer periphery of the insulating layer, wherein in a predetermined range near the end of the flexible tube for transporting fluid, the insulating layer is made of divided insulating material divided in the axial direction of the flexible tube for transporting fluid, and the insulating layer other than the end is constructed as a single unit without being divided in the axial direction of the flexible tube for transporting fluid.
It is desirable that the pulling force required when pulling out the divided insulation layer from between the inner layer and the outer layer be 0.2 N or less.

The divided insulation material may be covered with a waterproof material.

A water-absorbent material may be placed in the gaps between the divided insulation materials.

The divided insulation material may be formed with a hook portion onto which a jig can be hooked.

At least some of the divided insulation materials among the multiple divided insulation materials arranged in the axial direction of the flexible pipe for transporting fluid may be provided with a mark that allows the divided insulation materials to be identified.

The outer layer may be marked at positions corresponding to the arrangement of each of the multiple divided insulation materials arranged side by side in the axial direction of the flexible pipe for transporting fluid.

A terminal member may be connected to the end of the flexible tube for transporting fluid, and a portion of the terminal member may be inserted between the inner layer and the outer layer.

According to the first aspect of the present invention, since the insulation layer is made of the divided insulation material in a predetermined area near the end of the flexible tube for transporting fluid, a gap can be easily formed between the outer layer and the inner layer by pulling out the divided insulation material from the end after cutting the end of the flexible tube for transporting fluid. This makes it easy to attach the terminal member at the site.
Furthermore, by setting the pulling force required to pull out the divided insulation layer from between the inner and outer layers to 0.2 N or less, the divided insulation material can be pulled out by hand.

In addition, by covering the divided insulation material with a waterproofing material, deterioration of the insulation performance due to water absorption by the divided insulation material when water penetrates can be suppressed.

In addition, by placing water-absorbent material in the gaps between the divided insulation materials, it is possible to prevent moisture from running down the insulation layer.

In addition, by forming a hook portion on the split insulation material that allows a jig to be hooked onto it, when pulling out the split insulation material from the end of the flexible tube for transporting fluid, the jig or the like can be hooked onto the hook portion and pulled out. This makes it easier to pull out the split insulation material.

In addition, by marking the multiple insulation segments to indicate the order in which they are arranged from the tip of the flexible tube for transporting fluid, it is easy to know how much insulation remains when a segment is pulled out.

In addition, by placing marks on the outer layer at positions corresponding to the placement of each of the multiple divided insulation materials, the placement of the divided insulation materials can be known from the outside. This makes it easy to determine the positions where the outer layer, etc. should be cut, and also makes it easy to know how much of the divided insulation material remains.

A terminal member may be connected to the end of such a flexible tube for transporting fluid in advance.

A second invention is a method for repairing a flexible tube for transporting a fluid , the flexible tube for transporting a fluid comprising an inner layer arranged as the innermost layer, an insulating layer arranged on the outer periphery of the inner layer, and an outer layer arranged on the outer periphery of the insulating layer, the insulating layer being composed of a divided insulating material divided in the axial direction of the flexible tube for transporting a fluid in at least a predetermined range near the end of the flexible tube for transporting a fluid, the end of the flexible tube for transporting a fluid having a broken portion, the method comprising the steps of: cutting the end of the flexible tube for transporting a fluid including the broken portion; pulling out the divided insulating material from the end of the flexible tube for transporting a fluid to form a gap between the inner layer and the outer layer; and inserting and fixing a portion of a terminal member between the inner layer and the outer layer, and connecting the terminal member to the end of the flexible tube for transporting a fluid.

According to the second invention, the terminal portion of the flexible tube for transporting fluid can be easily repaired on-site.

The present invention provides a flexible tube for transporting fluids that can be easily connected to a terminal member even on-site.

FIG. 2 is a perspective view showing the structure of a flexible tube 1 for transporting fluid. FIG. 4A is a diagram showing an end structure of a flexible tube 1 for transporting a fluid, and FIG. 4B is a diagram showing another end structure. 4A and 4B are diagrams showing a repair process for a flexible tube for transporting fluid. 4A and 4B are diagrams showing a repair process for a flexible tube for transporting fluid. 4A and 4B are diagrams showing a repair process for a flexible tube for transporting fluid. FIG. 3 is a cross-sectional view of a flexible tube for transporting fluid. 1A is a cross-sectional view of a flexible tube 1b for transporting a fluid, and FIG. 1B is a cross-sectional view of a flexible tube 1c for transporting a fluid. 4A is a diagram showing another embodiment of the divided insulation material 21, and FIG. 4B is a diagram showing yet another embodiment of the divided insulation material 21. FIG. FIG. 1 is a cross-sectional view showing a conventional flexible tube 100 for transporting a fluid.

The following describes in detail the embodiments of the present invention. Fig. 1 is a perspective view of a flexible tube 1 for transporting fluid according to a first embodiment of the present invention, and Fig. 2 is a cross-sectional view of the flexible tube 1 for transporting fluid in the axial direction. The flexible tube 1 for transporting fluid, which is capable of transporting low-temperature fluids such as liquefied gas, is mainly composed of a flexible tube 3, a reinforcing layer 9, a heat insulating layer 11, a protective layer 13, etc. The structure of the flexible tube 1 for transporting fluid is not limited to the example shown in the figure.

The flexible tube 3 is located in the innermost layer of the flexible tube 1 for transporting fluid, and is made of stainless steel, which has excellent buckling strength against external pressure, such as an interlock tube, and also has good low-temperature resistance and corrosion resistance. In this case, the flexible tube 3 is made by forming the tape into an S-shaped cross section and connecting the S-shaped parts by meshing them together, and has flexibility. Note that instead of the interlock tube, it is also possible to use other types of tubes, such as bellows tubes, as long as they have similar flexibility and excellent buckling strength, etc.

A resin layer 5 is provided on the outer periphery of the flexible tube 3. The resin layer 5 blocks the fluid flowing inside the flexible tube 3. The resin layer 5 is made of a resin such as polyethylene. A seat layer 15a may be provided between the flexible tube 3 and the resin layer 5. The seat layer 15a is provided as necessary and is a layer for making the uneven shape of the outer periphery of the flexible tube 3 approximately flat, and can deform in accordance with the flexibility of the flexible tube 3. For example, the seat layer 15a has a certain thickness, such as a nonwoven fabric, and acts as a cushion for the unevenness of the outer periphery of the flexible tube 3.

The resin layer 5 provided on the outer periphery of the flexible tube 3 does not necessarily mean that the flexible tube 3 and the resin layer 5 are in contact with each other. For example, even if another layer such as a seat layer 15a is sandwiched between the flexible tube 3 and the resin layer 5, the resin layer 5 is said to be provided on the "outer periphery" of the flexible tube 3. This also applies when the term "outer periphery" is used in the following description. The seat layer is not shown in FIG. 2.

A reinforcing layer 9 is provided on the outer periphery of the resin layer 5. The reinforcing layer 9 is a layer that mainly serves to prevent deformation due to the internal pressure of the fluid flowing inside the flexible tube 3 and deformation (stretching) of the flexible tube for transporting fluid in the axial direction. The reinforcing layer 9 may be formed by wrapping multiple fiber reinforcing tapes around the flexible tube 3, or may be a woven fabric woven in the axial and circumferential directions. A tensile strength member may also be embedded in the resin layer 5 in the axial direction.

The reinforcing layer 9 is located inside the insulating layer 11, and is cooled to a temperature close to that of the low-temperature fluid when a low-temperature fluid is flowed inside the flexible tube 3. Therefore, it is desirable for the reinforcing layer 9 to be made of a material with excellent low-temperature properties that maintains high strength even at extremely low temperatures and does not become embrittled.

Here, the flexible tube 3, resin layer 5, and reinforcing layer 9 are collectively referred to as the inner layer 7. In other words, the layers disposed on the innermost layer inside the insulating layer 11 are collectively referred to as the inner layer 7. Note that if the flexible tube 3 alone can ensure airtightness and watertightness of the internal fluid, the resin layer 5 is not necessary. In this way, the form of the inner layer 7 is not particularly limited as long as it is flexible, allows the fluid to flow inside, and can block outflow to the outside.

An insulating layer 11 is provided on the outer periphery of the reinforcing layer 9 (inner layer 7). The insulating layer 11 insulates the low-temperature fluid flowing inside the flexible tube 3 from the outside of the flexible tube 1 for transporting fluid, and is deformable to match the flexibility of the flexible tube 3. The insulating layer 11 may be made of, for example, a blanket-type insulating material such as glass fiber, ceramic fiber, or rock wool, or aerogel, plastic foam, or plastic with a filler material such as glass beads dispersed therein.

If necessary, a seat layer 15b is provided on the outer periphery of the reinforcing layer 9. The seat layer 15b is a layer for smoothing out the uneven shape of the outer periphery of the reinforcing layer 9.

A protective layer 13 is provided on the outer periphery of the insulating layer 11. That is, the protective layer 13 is formed on the outermost periphery of the flexible tube 1 for transporting fluid. A seat layer 15c may be provided in advance on the outer periphery of the insulating layer 11. The protective layer 13 prevents water from entering from the outside and is deformable in accordance with the flexibility of the flexible tube 3, and is made of a thermoplastic resin such as polyurethane. The layer outside the insulating layer 11 is the outer layer 17. That is, in this embodiment, the protective layer 13 mainly constitutes the outer layer 17, but other layers may be included.

The flexible tube 1 for transporting fluids is not limited to the above configuration. It may have other functional layers, and some components may be omitted as long as it satisfies the function of the flexible tube 1 for transporting fluids.

Next, the terminal structure of the flexible tube 1 for transporting fluid will be described. FIG. 3(a) is an axial cross-sectional view showing the terminal structure of the flexible tube 1 for transporting fluid. In the vicinity of the end of the flexible tube 1 for transporting fluid, the insulating layer 11 is composed of a plurality of divided insulating materials 21 divided in the axial direction of the flexible tube for transporting fluid in a predetermined range. That is, each divided insulating material 21 is approximately annular and is arranged on the outer periphery of the inner layer 7 in the axial direction of the flexible tube for transporting fluid. The divided insulating material 21 does not have to be completely annular, and may be a substantially C-shaped member with a part cut off. In addition, the insulating layer 11 in the portion other than the predetermined range at the end of the flexible tube 1 for transporting fluid is composed of an integral body (including spiral winding and vertical winding) without being divided in the axial direction of the flexible tube 1 for transporting fluid.

The width of the divided insulation material 21 (the length in the axial direction of the flexible pipe for transporting fluid) can be, for example, about 0.1 m to 1 m, and more preferably about 0.1 m to 0.5 m. The range in which the divided insulation material 21 is arranged can be, for example, about 10 m from the end.

At the end of the flexible tube 1 for transporting fluid, terminal members 19a and 19b are connected. Terminal member 19a holds and fixes the end of the outer layer 17, and one surface of terminal member 19b holds and fixes the end of the inner layer 7. A groove corresponding to the shape of the end of the inner layer 7 is formed in terminal member 19b, and the end of the inner layer 7 is inserted into the groove. In this state, the inner layer 7 is sandwiched from the inside and outside, and terminal member 19b and the inner layer 7 are fixed by fixing members (not shown).

A groove corresponding to the shape of the end of the outer layer 17 is formed on one surface of the terminal member 19a, and the end of the outer layer 17 is inserted into the groove. In this state, the terminal member 19a and the outer layer 17 are fixed by fixing members (not shown) so as to sandwich the outer layer 17 from the inside and outside. Furthermore, the terminal members 19a and 19b are connected by connecting members (not shown). At this time, a part of the terminal member 19a is inserted between the outer layer 17 and the inner layer 7, but a part of the divided insulation material 21 inside the outer layer 17 is removed, and a gap is formed between the outer layer 17 and the inner layer 7, so there is no interference between the terminal member 19a and the insulation layer 11.

The terminal structure is not limited to the example shown in FIG. 3(a). For example, as shown in FIG. 3(b), a terminal member 19c in which terminal members 19a and 19b are integrated may be used. That is, grooves corresponding to the end shapes of the inner layer 7 and the outer layer 17 are formed concentrically on one surface of the terminal member 19c. The inner layer 7 and the outer layer 17 are inserted and fixed in the respective grooves. Thus, the shape of the terminal structure is not particularly limited, but the present invention is effective when a part of the terminal member is inserted into the gap between the inner layer 7 and the outer layer 17.

Next, a method for repairing the flexible tube 1 for transporting fluid will be described. FIG. 4(a) is a diagram showing a state in which a broken portion 23 has occurred in a part of the terminal structure of the flexible tube 1 for transporting fluid. That is, the flexible tube 1 for transporting fluid has a broken portion at the end. In the following description, an example using the terminal members 19a and 19b will be described, but the same applies to the terminal member 19c. As described above, in the terminal structure of the flexible tube 1 for transporting fluid, stress tends to concentrate near the connection with the terminal members 19a and 19b, and broken portions are likely to occur. The broken portion may be detected using a sensor (not shown), or the broken portion may be identified by cutting the tube once and visually inspecting the inside.

In this way, when a broken portion occurs near the end of the flexible tube 1 for transporting fluid, the end of the flexible tube 1 for transporting fluid, including the broken portion 23, is cut together with the terminal members 19a and 19b, as shown in FIG. 4(b). When cutting the end of the flexible tube 1 for transporting fluid, the terminal members 19a and 19b may be removed in advance, and the terminal members 19a and 19b may be reused.

Next, as shown in FIG. 5(a), the outer layer 17 is cut to a predetermined length as necessary. In other words, the inner layer 7 is made to protrude from the outer layer 17. The outer layer 17 can be easily cut from the outer periphery of the flexible tube 1 for transporting fluid with a blade. Note that this step is not necessary when using the terminal member 19c.

Next, as shown in FIG. 5(b), a predetermined number of split insulation materials 21 are pulled out from the end (cut surface) of the flexible tube for transporting fluid 1. The number of split insulation materials 21 to be pulled out is set according to the size of the terminal member 19a and the size of the split insulation materials 21. By pulling out the split insulation materials 21 from between the inner layer 7 and the outer layer 17, a gap can be formed between the inner layer 7 and the outer layer 17 without turning up the outer layer 17.

In addition, since each divided insulation material 21 has a narrow width (length in the axial direction of the flexible tube for transporting fluid), a large pulling force is not required. For example, the pulling force required to pull out the divided insulation material 21 is preferably 0.2 N or less, and more preferably 0.1 N or less. In this way, the divided insulation material 21 can be pulled out by hand.

Next, as shown in FIG. 6(a), a portion of the terminal member 19a is inserted and fixed between the inner layer 7 and the outer layer 17 so as to sandwich the end of the outer layer 17 from inside and outside. Furthermore, as shown in FIG. 6(b), the terminal member 19b is fixed so as to sandwich the end of the inner layer 7 from inside and outside. Finally, the terminal members 19a and 19b are fixed, and the repair of the flexible tube for transporting fluid 1 is completed.

As described above, according to the flexible tube 1 for transporting fluid in this embodiment, the insulating layer 11 near the end is composed of split insulating material 21, so that when attaching the terminal member 19a, the required number of split insulating materials 21 can be pulled out. This makes it easy to form a gap of the desired length between the inner layer 7 and the outer layer 17, and the terminal member can be attached. In this way, the installation work of the terminal member can be easily performed even on-site, so that even if damage occurs near the terminal member, it can be easily repaired on-site.

Next, a second embodiment will be described. FIG. 7 is a diagram showing a flexible tube 1a for transporting fluid according to the second embodiment. In the following description, components that perform the same functions as the flexible tube 1 for transporting fluid are given the same reference numerals as in FIG. 1 to FIG. 6(b), and duplicated descriptions will be omitted.

The flexible tube 1a for transporting fluid has a configuration similar to that of the flexible tube 1 for transporting fluid, but differs in that a water-absorbent member 25 is disposed therein. A water-absorbent member 25 such as a water-absorbent string is disposed in the gaps between the divided insulation materials 21. In this way, by disposing the water-absorbent member 25 in the gaps between the divided insulation materials 21, water leakage in the gaps between the divided insulation materials 21 can be suppressed.

The water-absorbent member 25 may be placed in other locations, not just in the gaps between the divided insulation materials 21. For example, a water-absorbent string or the like may be arranged in a spiral shape on the outer or inner circumference of the insulation layer 11 over the entire length of the insulation layer 11.

The second embodiment can achieve the same effects as the first embodiment. In addition, the water-absorbent member 25 can prevent water from leaking into the gaps between the divided insulation materials 21.

Next, a third embodiment will be described. FIG. 8(a) is a diagram showing a flexible tube 1b for transporting fluid according to the third embodiment. The flexible tube 1b for transporting fluid has a configuration substantially similar to that of the flexible tube 1 for transporting fluid, but differs in that each divided insulating material 21 is provided with a mark 27a.

The marks 27a can identify each divided insulation material 21 by numbers, symbols, colors, etc. Therefore, it is possible to know the arrangement of the divided insulation materials 21 arranged in the axial direction of the flexible tube 1b for transporting fluid from the tip of the original flexible tube 1b for transporting fluid. For example, when the repair of the flexible tube for transporting fluid described above is repeated multiple times, the number of remaining divided insulation materials 21 can be known by checking the marks 27a of the divided insulation materials 21 that have been pulled out, making it possible to determine whether repairs are possible. It is also possible to know the number of remaining repairs that can be made.

The mark 27a is not limited to being placed on the outer peripheral surface of the split insulation material 21 as shown in the figure, but may be placed on the end surface of the split insulation material 21. Also, instead of placing the mark 27a on all the split insulation materials 21, the mark 27a may be placed only on some of the split insulation materials 21 on the base side (the side opposite the tip side, the left side in the figure), so that by checking the split insulation materials 21 with the mark 27a, it is possible to know that only a small amount of the split insulation material 21 remains. In this way, it is sufficient that at least some of the split insulation materials 21 among the multiple split insulation materials 21 arranged side by side in the axial direction of the flexible tube 1 for transporting fluids are placed with the mark 27a that allows the split insulation material 21 to be identified.

Also, as in the flexible tube 1c for transporting fluid shown in FIG. 8(b), marks 27b may be applied to the outer layer 17 at positions corresponding to the arrangement of each of the multiple divided insulation materials 21 arranged side by side in the axial direction of the flexible tube 1c for transporting fluid (for example, positions between the divided insulation materials 21). This also makes it easy to know the number of remaining divided insulation materials 21. Also, when cutting the end of the flexible tube 1c for transporting fluid, the cut can be made to match the position of the divided insulation materials 21.

According to the third embodiment, the same effect as the first embodiment can be obtained. In addition, by attaching marks 27a and 27b at desired positions, the arrangement of the divided insulation materials 21 and the remaining number can be grasped.

To achieve even higher water-stopping properties, the divided insulation material 21 may be covered with a water-blocking member 29 as shown in FIG. 9(a). Also, as shown in FIG. 9(b), a hook portion 31 may be provided on the end face of the divided insulation material 21. A jig or the like can be hooked onto the hook portion 31. The hook portion 31 may be, for example, a string or fiber arranged in a ring shape, or a metal fitting such as a hook may be arranged. Also, a recess or protrusion onto which a jig can be hooked may be formed on the end face.

By positioning the hook portion 31 toward the end side of the flexible tube 1 for transporting fluid, a jig or the like can be hooked onto the hook portion 31 from the end of the flexible tube 1 for transporting fluid, and the divided insulation material 21 can be easily pulled out from the gap between the inner layer 7 and the outer layer 17.

Although the embodiment of the present invention has been described above with reference to the attached drawings, the technical scope of the present invention is not limited to the above-mentioned embodiment. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

For example, the configuration of the flexible tube for transporting fluid is not limited to the example shown in the figure, and any cross-sectional structure may be used as long as it has an inner layer, a heat insulating layer, and an outer layer. It goes without saying that the configurations according to the above-mentioned embodiments can be combined with each other.

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c... Flexible tube for transporting fluid 3... Flexible tube 5... Resin layer 7... Inner layer 9... Reinforcing layer 11... Thermal insulation layer 13... Protective layer 15a, 15b, 15c... Seat layer 17... Outer layer 19a, 19b, 19c... Terminal member 21... Divided insulation material 23... Damaged part 25... Water-absorbent member 27a, 27b... Mark 29... Water-blocking member 31... Hook portion 100... Flexible tube for transporting fluid 103... Flexible tube 105... Resin layer 107... Inner layer 109... Reinforcing layer 111... Thermal insulation layer 113... Protective layer 117... Outer layer 119a, 119b... Terminal member

Claims (9)

A flexible tube for transporting a fluid, comprising:
An inner layer disposed on the innermost layer;
A heat insulating layer disposed on the outer periphery of the inner layer;
An outer layer disposed on the outer periphery of the thermal insulation layer;
Equipped with
In a predetermined range in the vicinity of the end of the flexible tube for transporting fluid, the heat insulating layer is composed of divided heat insulating materials that are divided in the axial direction of the flexible tube for transporting fluid ,
2. A flexible pipe for transporting fluid, wherein the heat insulating layer other than the end portion is integrally formed without being divided in the axial direction of the flexible pipe for transporting fluid . 2. The flexible pipe for transporting fluid according to claim 1, wherein a pulling force required for pulling out said divided insulation layer from between said inner layer and said outer layer is 0.2 N or less. 3. The flexible pipe for transporting a fluid according to claim 1, wherein the divided heat insulating material is covered with a water-blocking material. 4. The flexible pipe for transporting a fluid according to claim 1, wherein a water-absorbent material is disposed in the gap between the divided insulating materials. 5. The flexible pipe for transporting a fluid according to claim 1, wherein the divided heat insulating material is formed with a hook portion on which a jig can be hooked. A flexible tube for transporting fluid as described in any one of claims 1 to 5, characterized in that at least some of the multiple divided insulation materials arranged side by side in the axial direction of the flexible tube for transporting fluid are marked with a mark that allows the divided insulation material to be identified. A flexible tube for transporting fluids as described in any one of claims 1 to 6 , characterized in that the outer layer is marked at positions corresponding to the arrangement of each of the multiple divided insulation materials arranged side by side in the axial direction of the flexible tube for transporting fluids. A terminal member is connected to an end of the fluid transport flexible tube,
8. The flexible tube for transporting a fluid according to claim 1 , wherein a portion of said terminal member is inserted between said inner layer and said outer layer. 1. A method for repairing a flexible fluid transport pipe for transporting a fluid , comprising the steps of:
The fluid transport flexible tube comprises:
An inner layer disposed on the innermost layer;
A heat insulating layer disposed on the outer periphery of the inner layer;
An outer layer disposed on the outer periphery of the thermal insulation layer;
Equipped with
the heat insulating layer is made of a divided heat insulating material divided in an axial direction of the flexible tube for transporting fluid, at least in a predetermined range in the vicinity of an end of the flexible tube for transporting fluid,
The flexible tube for transporting fluid has a broken portion at an end thereof ,
cutting the end of the flexible tube for transporting fluid, including the broken portion;
a step of pulling out the divided insulation material from an end portion of the flexible pipe for transporting fluid to form a gap between the inner layer and the outer layer;
a step of inserting and fixing a part of a terminal member between the inner layer and the outer layer , and connecting the terminal member to an end of the flexible tube for transporting fluid ;
1. A method for repairing a flexible pipe for transporting fluid, comprising:

Images