JP2024021110A - end device - Google Patents

Abstract

To provide an end part device which achieves downsizing of an outer diameter dimension of an outer tube to reduce a minimum bending radius of a double hose and thereby achieve downsizing of a hose reel for winding storage.SOLUTION: An end part device includes: an inner tube side cylinder member 11 configured to be inserted into the inner periphery side of an inner tube 2; an inner tube side close contact member 12 which is provided at the outer periphery side of the inner tube 2 into which the inner tube side cylinder member 11 is inserted and causes the inner tube 2 to contact tightly with an outer peripheral surface of the inner tube side cylinder member 11; an outer tube side cylinder member 13 provided at the outer periphery side of the inner tube 2 and configured to be inserted into the inner periphery side of an outer tube 3; an outer tube side close contact member 14 which is provided at the outer periphery side of the outer tube 3 into which the outer tube side cylinder member 13 is inserted and causes the outer tube 3 to contact tightly with an outer peripheral surface of the outer tube side cylinder member 13; and a sealing structure 15 which seals a heat insulation layer 4 between the inner tube 2 and the outer tube 3. The inner tube side close contact member 12 is disposed in a portion, protruding from the outer tube side cylinder member 13 to the axial outer side, of the inner tube 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to an end device for attachment to the end of a double hose, each having an inner tube and an outer tube of flexible material.

As a conventional end device, one that is attached to the end of a double hose having an inner tube and an outer tube each made of a flexible material is known (for example, see Patent Document 1).

The double hose to which the end device is attached has a heat insulating layer formed between the inner pipe and the outer pipe, and is used, for example, to connect a ship at sea and a storage tank on land, or to connect a ship at sea to a storage tank on land. It is used to transport low-temperature liquids such as liquefied natural gas, liquefied carbon dioxide, and liquefied ammonia.

A double hose is wound around a hose reel when stored, and is used with one end pulled out from the hose reel. The minimum bending radius, which is the minimum radius at which the double hose can be bent without bending, increases in proportion to the outer diameter of the double hose. Therefore, in order to reduce the size of the winding and storing hose reel, it is required to reduce the outer diameter of the double hose.

Special Publication No. 2010-500523

The conventional end device includes an inner tube side end member attached to the end of the inner tube and an outer tube side end member attached to the end of the outer tube, and has a diameter of the inner tube side end member. An outer tube side end member is arranged on the outer side in the direction. For this reason, in conventional end devices, the outer diameter of the outer tube is sized according to the outer diameter of the outer tube end member disposed radially outward of the inner tube end member. It is difficult to reduce the outer diameter of the tube.

An object of the present invention is to reduce the minimum bending radius of a double hose by reducing the outer diameter of the outer tube, thereby reducing the size of the hose reel for winding and storage. The goal is to provide equipment.

The end device according to the present invention is an end device that is attached to the end of a double hose having an inner tube and an outer tube each made of a flexible material, and is inserted into the inner peripheral side of the inner tube. an inner tube side cylindrical member; an inner tube side close contact member that is provided on the outer peripheral side of the inner tube into which the inner tube side cylindrical member is inserted and brings the inner tube into close contact with the outer peripheral surface of the inner tube side cylindrical member; an outer tube side tube member provided on the outer circumference side of the inner tube and inserted into the inner circumference side of the outer tube; and an outer tube side tube member provided on the outer circumference side of the outer tube into which the outer tube side tube member is inserted; The inner tube side close contact member includes an outer tube side close contact member that brings the outer tube into close contact with an outer peripheral surface of the tube side cylinder member, and a sealing structure that seals a heat insulating layer between the inner tube and the outer tube. is arranged in a portion of the inner tube that projects outward in the axial direction from the outer tube side cylinder member.

Further, in the end device according to the present invention, the inner tube-side close member connects a plurality of abutting members whose surfaces that abut against the inner tube extend in an arc shape, and the ends of the adjacent abutting members. and a plurality of connecting members, which are configured in an annular shape, and the outer tube-side close contact member has a plurality of contact members whose surfaces that contact the outer tube extend in an arc shape, and the adjacent abutment members. and a plurality of connecting members that connect the ends of each other, and is configured in an annular shape.

Further, in the end device according to the present invention, an inner tube side flange portion is provided on the inner tube side cylinder member and extends radially outward in the circumferential direction from a portion located on the outer side in the axial direction than the end of the outer tube. is provided, and the outer tube side cylindrical member is provided with an outer tube side flange portion that extends radially outward in the circumferential direction from a portion located axially inner than the inner tube side flange portion, and the sealed structure has a cylindrical closing member that closes a gap between the inner tube side flange portion and the outer tube side flange portion in the circumferential direction.

Further, in the end device according to the present invention, the heat insulating layer has an average thickness of 20 mm or less.

The double hose according to the invention also has an end device.

According to the present invention, it is possible to connect the end device to the end of the double hose by arranging the inner tube-side close member and the outer tube-side close member to be shifted from each other in the axial direction of the double hose. As a result, it is possible to reduce the outer diameter of the outer tube while maintaining the inner diameter of the inner tube, making it possible to reduce the minimum bending radius of the double hose and making it easier to use the hose reel for winding and storage. It becomes possible to achieve miniaturization.

FIG. 1 is a longitudinal sectional view of an end device according to a first embodiment of the present invention. FIG. 2 is a sectional view of the inner tube side close contact member and the outer tube side close contact member according to the first embodiment of the present invention. FIG. 3 is a longitudinal sectional view of an end device according to a second embodiment of the invention. FIG. 4 is a longitudinal sectional view of an end device according to a third embodiment of the present invention. FIG. 5 is a longitudinal sectional view of an end device according to a fourth embodiment of the present invention.

<First embodiment>
1 and 2 show a first embodiment of the present invention. Figure 1 is a longitudinal cross-sectional view of the end device (cut along the central axis direction of the double hose), and Figure 2 is a cross-sectional view of the inner tube-side close member and the outer tube-side close member (of the double hose). (A diagram cut along a direction perpendicular to the central axis). In addition, the dashed-dotted line in FIG. 1 represents the central axis of the double hose, and since the lower side of the central axis is in a line-symmetrical relationship with the upper side with respect to the central axis, it is omitted.

The end device 10 of the present embodiment connects, for example, a ship on the sea and a storage tank on land, and connects a ship and the storage tank with each other to store low-temperature gas (e.g., liquefied natural gas, liquefied carbon dioxide, liquefied ammonia, etc.). It is attached to the end of a double hose 1 that conveys liquid at temperatures above -60°C and below 0°C.

The double hose 1 has a cylindrical inner tube 2 and an outer tube 3, each made of a flexible material. The inner tube 2 and the outer tube 3 are each formed of a flexible material, for example, by covering a fabric knitted with fibers made of a polymer compound with an elastomer. The double hose 1 is constructed by forming an air layer between the inner tube 2 and the outer tube 3 or by filling a heat insulating material made of non-woven fabric or the like between the inner tube 2 and the outer tube 3. A heat insulating layer 4 is formed to block the transfer of heat between the two.

In the double hose 1, for example, the inner diameter of the inner tube 2 is 102 mm, the outer diameter of the outer tube 3 is 130 mm, the thickness of each of the inner tube 2 and the outer tube 3 is 4 mm, and the insulation is The average thickness dimension of layer 4 is 20 mm. Here, the average thickness of the heat insulating layer 4 may be 20 mm or less, for example, preferably within a range of 0.1 mm or more and 20 mm or less.

The double hose 1 is stored wound around a hose reel and used with one end pulled out from the hose reel.

As shown in FIG. 1, the end device 10 is provided on an inner tube side cylinder member 11 inserted into the inner circumference side of the inner tube 2, and on an outer circumference side of the inner tube 2 into which the inner tube side cylinder member 11 is inserted. an inner tube side contact member 12 which is provided on the outer circumferential side of the inner tube 2 and is inserted into the inner circumferential side of the outer tube 3; A cylindrical member 13, an outer tube side contact member 14 which is provided on the outer circumferential side of the outer tube 3 into which the outer tube side cylindrical member 13 is inserted and brings the outer tube 3 into close contact with the outer circumferential surface of the outer tube side cylindrical member 13; A sealing structure 15 that seals a heat insulating layer 4 between the tube 2 and the outer tube 3 is provided.

The inner tube side cylindrical member 11 includes a cylindrical inner tube side cylindrical portion 11a having an outer diameter slightly smaller than the inner diameter of the inner tube 2, and a circumferential direction from the axial end of the inner tube side cylindrical portion 11a. The inner tube side flange portion 11b extends radially outward throughout the tube. The inner tube side cylindrical portion 11a is inserted into the inner peripheral side of the inner tube 2 from the axial end of the inner tube 2. In addition, the inner tube side flange portion 11b is bolted while facing a flange portion provided at the end of a piping connection portion provided on a ship, storage tank, etc. to which the end portion of the double hose 1 is connected. It is fixed by a fastening member such as. Furthermore, a sealing member 11b1 is arranged between the inner tube side flange portion 11b and the connection port side flange portion to prevent leakage of the liquid to be transported.

As shown in FIG. 2, the inner tube side contact member 12 includes a plurality of abutting members 12a each having an arcuate surface that abuts the inner tube 2, and connects the ends of the adjacent abutting members 12a to each other. It has a plurality of connecting members 12b. The connecting member 12b consists of a bolt 12b1 and a nut 12b2. The inner tube-side close contact member 12 is formed into an annular shape by connecting adjacent ends of the plurality of abutting members 12a with a connecting member 12b. The inner tube side contact member 12 is attached so as to circumferentially surround the outer circumferential side of the portion of the inner tube 2 into which the inner tube side cylindrical portion 11a is inserted, and connects the ends of the adjacent contact members 12a with each other. 12b, the inner tube 2 is brought into close contact with the outer peripheral surface of the inner tube side cylindrical portion 11a.

The outer tube side cylindrical member 13 has an outer diameter slightly smaller than the inner diameter of the outer tube 3, and has an outer diameter dimension that is slightly smaller than the inner diameter dimension of the inner tube side flange portion 11b and an inner tube attached to the outer circumferential side of the inner tube 2. It is a cylindrical member having an inner diameter smaller than the outer diameter of the side contact member 12. The outer tube side cylinder member 13 is inserted into the inner circumferential side of the outer tube 3 with the inner tube 2 inserted into the inner circumferential side.

The outer tube-side contact member 14 has the same configuration as the inner tube-side contact member 12, and as shown in FIG. and a plurality of connecting members 14b that connect the ends of adjacent abutting members 14a. The connecting member 14b consists of a bolt 14b1 and a nut 14b2. The outer tube-side close contact member 14 is formed into an annular shape by connecting adjacent ends of each of the plurality of abutting members 14a with a connecting member 14b. The outer tube side contact member 14 is attached so as to circumferentially surround the outer circumferential side of the portion of the outer tube 3 into which the outer tube side cylindrical member 13 is inserted, and connects the ends of the adjacent contact members 14a with the connecting member 14b. By fastening the outer tube 3 to the outer peripheral surface of the outer tube side cylinder member 13, the outer tube 3 is brought into close contact with the outer peripheral surface of the outer tube side cylinder member 13.

Here, in the double hose 1 to which the end device 10 is attached, the inner tube 2 extends axially outward (to the right in FIG. 1) from the end of the outer tube 3. The inner tube side contact member 12 is attached to a portion of the outer circumferential side of the inner tube 2 that projects outward in the axial direction from the end of the outer tube side cylindrical member 13 attached to the outer tube 3.

The sealing structure 15 includes a position fixing member 15a for fixing the axial position of the outer tube 3 with respect to the inner tube 2 of the double hose 1, and is arranged on the outer peripheral side of the position fixing member 15a, and prevents seawater from entering the heat insulating layer 4. It has a water shielding member 15b for preventing infiltration of water.

The position fixing member 15a is, for example, an adhesive tape made of a resin film-like member reinforced with glass fibers. The position fixing member 15a is wound in the axial direction of the outer tube 3 with respect to the inner tube 2 of the double hose 1 by wrapping it without any gap from the end of the inner tube 2 to the end side of the outer tube 3 including the outer tube side close contact member 14. fix the position.

The water shielding member 15b is a heat-shrinkable tube that is formed in a cylindrical shape and is made of resin and shrinks when heated. The water shielding member 15b covers the outer circumferential side from the end of the inner pipe 2 to the end of the outer pipe 3 including the outer pipe side contact member 14, thereby preventing seawater from flowing from the end of the outer pipe 3 to the heat insulating layer 4. block the infiltration of

When the end device 10 configured as described above is attached to the end of the double hose 1, the outer tube side cylinder member 13 is first placed on the outer peripheral side of the inner tube 2. Thereafter, the inner tube side cylindrical portion 11a of the inner tube side cylindrical member 11 is inserted into the inner tube 2 from the end, and the inner tube is inserted into the portion of the inner tube 2 located on the outer peripheral side of the inner tube side cylindrical portion 11a. Attach the tube-side close member 12. Further, the outer tube side cylindrical member 13 is inserted into the outer tube 3 from the end, and the outer tube side close contact member 14 is attached to a portion of the outer tube 3 located on the outer peripheral side of the outer tube side cylindrical member 13. Finally, the position fixing member 15a and the water shielding member 15b constituting the sealing structure 15 fix the axial position of the outer tube side tube member 13 with respect to the inner tube side tube member 11, and the outer circumference of the inner tube 2. The gap between the surface and the inner circumferential surface of the outer tube side cylinder member 13 is closed (the space including the gap is kept watertight).

As described above, according to the end device 10 of the present embodiment, the end device 10 is attached to the end of the double hose 1 having the inner tube 2 and the outer tube 3 each made of a flexible material, An inner tube side cylinder member 11 is inserted into the inner circumference of the inner tube 2, and an inner tube is provided on the outer circumference of the inner tube 2 into which the inner tube side cylinder member 11 is inserted. An inner tube side close member 12 that brings the tubes 2 into close contact with each other, an outer tube side cylindrical member 13 provided on the outer circumferential side of the inner tube 2 and inserted into the inner circumferential side of the outer tube 3, and an outer tube side cylindrical member 13 that is inserted an outer tube-side contact member 14 that is provided on the outer circumferential side of the outer tube 3 and brings the outer tube 3 into close contact with the outer circumferential surface of the outer tube-side cylindrical member 13; and a heat insulating layer 4 between the inner tube 2 and the outer tube 3. The inner tube-side close contact member 12 is disposed in a portion of the inner tube 2 that projects outward in the axial direction from the outer tube-side cylinder member 13.

Moreover, according to the double hose 1 of this embodiment, the end device 10 is provided.

As a result, the end device 10 can be connected to the end of the double hose 1 with the inner tube side close member 12 and the outer tube side close member 14 shifted from each other in the axial direction of the double hose 1. This makes it possible to reduce the outer diameter of the outer tube 3 while maintaining the inner diameter of the inner tube 2. This makes it possible to reduce the minimum bending radius of the double hose 1, making it easier to wind up. It is possible to downsize the storage hose reel.

In addition, the inner tube side contact member 12 includes a plurality of abutting members 12a whose surfaces that abut the inner tube 2 extend in an arc shape, and a plurality of connecting members 12b that connect the ends of the adjacent abutting members 12a. The outer tube-side close contact member 14 has a plurality of contact members 14a whose surfaces that contact the outer tube 3 extend in an arc shape, and connects the ends of adjacent contact members 14a to each other. It is preferable that the connecting member 14b has a plurality of connecting members 14b, and is configured in an annular shape.

As a result, the plurality of abutting members 12a bring the inner tube 2 into close contact with the outer circumferential surface of the inner tube side tube member 11 circumferentially, and the plurality of abutment members 14a cause the outer tube 3 to come into close contact with the outer circumferential surface of the outer tube side tube member 11 in the circumferential direction. Since it is possible to bring the liquid into close contact with the outer circumferential surface of the outer tube 13, leakage of the liquid to be transported from between the inner tube 2 and the inner tube side tube member 11 is suppressed, and the connection between the outer tube 3 and the outer tube side tube member 13 is suppressed. This makes it possible to prevent seawater from entering between the two.

Moreover, it is preferable that the heat insulating layer 4 has an average thickness dimension of 20 mm or less.

Thereby, the outer diameter of the double hose 1 of the inner tube 2 does not become larger than necessary, and the hose reel for winding and storage can be further downsized.

In the first embodiment, the sealing structure 15 includes a position fixing member 15a for fixing the axial position of the outer tube 3 with respect to the inner tube 2 of the double hose 1, and a position fixing member 15a to prevent seawater from entering the heat insulating layer 4. Although the structure shown includes a water-shielding member 15b for preventing water damage, the present invention is not limited to this. If it is possible to fix the axial position of the outer tube 3 with respect to the inner tube 2 and prevent seawater from entering the heat insulating layer 4, for example, a sealed structure can be constructed using only a water-shielding member made of a heat shrink tube. You may.

<Second embodiment>
FIG. 3 shows a second embodiment of the present invention, and is a longitudinal sectional view of an end device. Note that the same components as those in the embodiment described above are designated by the same reference numerals.

The inner tube side cylindrical member 11 of the end device 10 of this embodiment includes a cylindrical inner tube side cylindrical portion 11a having an outer diameter slightly smaller than the inner diameter of the inner tube 2, and an inner tube side cylindrical portion The inner tube side flange portion 11b extends radially outward from the end of the inner tube side cylindrical portion 11a in the circumferential direction, and the inner tube side flange portion 11b extends radially outward in the circumferential direction. It has an inner tube side flange portion 11c for a closing member that extends outward. The outer diameter of the closing member inner tube flange 11c is larger than the outer diameter of the inner tube flange 11b.

In addition, the outer tube side tube member 13 of this embodiment has an outer diameter dimension slightly smaller than the inner diameter dimension of the outer tube 3, and the inner tube side flange portion 11b of the inner tube side tube member 11 and the inner tube for the closing member. A cylindrical outer tube-side cylindrical portion 13a having an inner diameter smaller than the outer diameter of each of the side flange portions 11c and the outer diameter of the inner tube-side close contact member 12 attached to the outer circumferential side of the inner tube 2. and a closing member outer tube side flange portion 13b extending radially outward from the axial end portion of the outer tube side cylindrical portion 13a over the circumferential direction. The outer diameter dimension of the outer tube side flange portion 13b for the closing member is formed larger than the inner tube side flange portion 11c for the closing member of the inner tube side cylinder member 11.

Furthermore, the sealing structure 15 of the present embodiment has a gap between the inner tube side flange portion 11c for the closing member of the inner tube side tube member 11 and the outer tube side flange portion 13b for the closing member of the outer tube side tube member 13. It has a closing member 15c that closes in the circumferential direction.

The closing member 15c includes a cylindrical main body portion 15c1, a first flange portion 15c2 extending circumferentially inward from one end of the main body 15c1, and an outer circumferential side extending circumferentially from the other end of the main body 15c1. It has a second flange portion 15c3 extending to.

The first flange portion 15c2 faces the inner tube flange portion 11c for the closing member of the inner tube side cylinder member 11 in the circumferential direction via the ring-shaped sealing member 15d. It is fastened to the side flange portion 11c. As a result, the flow of seawater is blocked between the first flange portion 15c2 and the closing member inner tube side flange portion 11c.

The second flange portion 15c3 is connected to the outer tube for closing member by bolts 15g while facing the outer tube side flange portion 13b for the closing member of the outer tube side cylinder member 13 in the circumferential direction via the ring-shaped sealing member 15f. It is fastened to the side flange portion 13b. As a result, the flow of seawater is blocked between the second flange portion 15c3 and the closing member outer tube side flange portion 13b.

When the end device 10 configured as described above is attached to the end of the double hose 1, the outer tube side cylinder member 13 is first placed on the outer peripheral side of the inner tube 2. Thereafter, the inner tube side cylindrical portion 11a of the inner tube side cylindrical member 11 is inserted into the inner tube 2 from the end, and the inner tube is inserted into the portion of the inner tube 2 located on the outer peripheral side of the inner tube side cylindrical portion 11a. Attach the tube-side close member 12. Further, the outer tube side cylindrical portion 13a of the outer tube side cylindrical member 13 is inserted into the outer tube 3 from the end, and the outer tube side cylindrical portion 13a of the outer tube 3 is inserted into the outer circumferential side of the outer tube side cylindrical portion 13a. Attach the tube-side close member 14. Finally, the first flange portion 15c2 of the closing member 15c constituting the sealing structure 15 is fastened to the closing member inner tube side flange portion 11c, and the second flange portion 15c3 is fastened to the closing member outer tube side flange portion 13b. By doing so, the position of the outer tube side tube member 13 is fixed and stabilized with respect to the inner tube side tube member 11, and the distance between the outer circumferential surface of the inner tube 2 and the inner circumferential surface of the outer tube side tube member 13 is Close the gap.

As described above, according to the end device 10 of the present embodiment, the inner tube-side close member 12 and the outer tube-side close member 14 are positioned relative to each other in the axial direction of the double hose 1, similarly to the first embodiment. With the shifted arrangement, it is possible to connect the end device 10 to the end of the double hose 1, and it is possible to reduce the outer diameter of the outer tube 3 while maintaining the inner diameter of the inner tube 2. Therefore, the minimum bending radius of the double hose 1 can be reduced, and the hose reel for winding and storage can be made smaller.

Further, the inner tube side cylindrical member 11 is provided with an inner tube side flange portion 11c for a closing member that extends radially outward in the circumferential direction from a portion located axially outer than the end of the outer tube 3, The outer tube side cylindrical member 13 includes a closing member outer tube side flange portion 13b that extends radially outward in the circumferential direction from a portion located on the axially inner side (left side in FIG. 3) than the inner tube side flange portion 11c. is provided, and the sealing structure 15 has a cylindrical closing member 15c that closes the gap between the closing member inner tube side flange portion 11c and the closing member outer tube side flange portion 13b in the circumferential direction. is preferred.

As a result, the closing member 15c can prevent seawater from entering the heat insulating layer 4, and also fix and stabilize the position of the outer tube side tube member 13 with respect to the inner tube side tube member 11. Since a special part for fixing the outer tube side tube member 13 to the inner tube side tube member 11 is not required, manufacturing costs can be reduced.

<Third embodiment>
FIG. 4 shows a third embodiment of the present invention, and is a longitudinal sectional view of an end device. Note that the same components as those in the embodiment described above are designated by the same reference numerals.

In the end device 10 of this embodiment, the outer diameter dimension of the inner tube side flange portion 11c for the closing member of the inner tube side cylinder member 11 is the same as the outer diameter dimension of the inner tube side flange portion 11b in the second embodiment. It is formed to the size of. That is, in the closing member 15c, the first flange portion 15c2 is held movably between the inner tube side flange portion 11b of the inner tube side cylinder member 11 and the inner tube side flange portion 11c for the closing member. Since it cannot be removed from the tube-side cylinder member 11, it is constructed as a single component together with the inner tube-side cylinder member 11. Further, the outer diameter dimension of the outer tube side flange portion 13b for the closing member of the outer tube side tube member 13 is formed larger than the outer diameter dimension of the inner tube side flange portion 11c for the closing member of the inner tube side tube member 11. There is.

In this embodiment, the outer diameter dimensions of the inner tube side flange portion 11c for a closing member of the inner tube side tube member 11 and the outer tube side flange portion 13b for a closure member of the outer tube side tube member 13 are compared with those of the second embodiment. Thus, each can be formed small.

The end device 10 configured as described above is attached to the end of the double hose 1 in the same way as in the second embodiment, and the position of the outer tube side tube member 13 with respect to the inner tube side tube member 11 is adjusted. It is fixed and stabilized, and the gap between the outer peripheral surface of the inner tube 2 and the inner peripheral surface of the outer tube side cylinder member 13 is closed.

As described above, according to the end device 10 of the present embodiment, the inner tube-side close member 12 and the outer tube-side close member 14 are positioned relative to each other in the axial direction of the double hose 1, similarly to the first embodiment. With the shifted arrangement, it is possible to connect the end device 10 to the end of the double hose 1, and it is possible to reduce the outer diameter of the outer tube 3 while maintaining the inner diameter of the inner tube 2. Therefore, the minimum bending radius of the double hose 1 can be reduced, and the hose reel for winding and storage can be made smaller.

<Fourth embodiment>
FIG. 5 shows a fourth embodiment of the present invention, and is a longitudinal sectional view of an end device. Note that the same components as those in the embodiment described above are designated by the same reference numerals.

The inner tube side cylindrical member 11 of the end device 10 of this embodiment is a cylindrical inner tube side cylindrical portion 11a having an outer diameter slightly smaller than the inner diameter of the inner tube 2, as in the first embodiment. and an inner tube side flange portion 11b extending radially outward in the circumferential direction from the axial end portion of the inner tube side cylindrical portion 11a. The inner tube side flange portion 11b of the inner tube side cylindrical member 11 is the hose of the connecting member 20 that is responsible for the detachable connection with the piping end provided on a ship, storage tank, etc. to which the end of the double hose 1 is connected. It is fixed with bolts 22 while facing the flange portion 21 provided at the side end. Further, a sealing member 11b1 is arranged between the inner tube side flange portion 11b and the flange portion 21 of the connecting member 20 to prevent leakage of the liquid to be transported.

Moreover, the outer tube side cylindrical member 13 of this embodiment is comprised of the outer tube side cylindrical part 13a and the outer tube side flange part 13b for a closing member similarly to 2nd Embodiment. The outer tube-side cylindrical portion 13a is larger than the outer diameter of the inner tube-side flange portion 11b of the inner tube-side tube member 11 and the outer diameter of the inner tube-side contact member 12 attached to the outer circumferential side of the inner tube 2. It also has a small inner diameter dimension. Further, the outer tube side flange portion 13b for the closing member has an outer diameter dimension larger than the outer diameter dimension of the flange portion 21 of the connecting member 20.

Furthermore, the sealing structure 15 of this embodiment spans the gap between the inner tube side flange portion 11b of the inner tube side tube member 11 and the closing member outer tube side flange portion 13b of the outer tube side tube member 13 in the circumferential direction. It has a closing member 15h for closing.

The closing member 15h includes a cylindrical body portion 15h1 and a flange portion 15h2 extending radially outward from the end of the body portion 15h1 on the side of the outer tube side flange portion 13b for the closing member in the circumferential direction. There is.

The closing member 15h is formed integrally with the flange portion 21 by welding the end portion of the main body portion 15h1 on the inner tube side flange portion 11b side to the radially outer side of the flange portion 21 of the connecting member 20 in the circumferential direction, for example. ing. As a result, the flow of seawater between the main body portion 15h1 and the flange portion 21 is blocked.

The flange portion 15h2 is opposed to the outer tube side flange portion 13b for the closing member of the outer tube side cylinder member 13 in the circumferential direction via the ring-shaped sealing member 15i, and is connected to the outer tube side flange for the closing member by bolts 15j. It is fastened to the portion 13b. Thereby, the flow of seawater is blocked between the flange portion 15h2 and the closing member outer tube side flange portion 13b.

The end device 10 configured as described above is attached to the end of the double hose 1 and is externally connected to the inner tube side cylinder member 11 by the closing member 15h, as in the second and third embodiments. The position of the tube-side cylinder member 13 is fixed and stabilized, and the gap between the outer peripheral surface of the inner tube 2 and the inner peripheral surface of the outer tube-side cylinder member 13 is closed.

As described above, according to the end device 10 of the present embodiment, the inner tube-side close member 12 and the outer tube-side close member 14 are positioned relative to each other in the axial direction of the double hose 1, similarly to the first embodiment. With the shifted arrangement, it is possible to connect the end device 10 to the end of the double hose 1, and it is possible to reduce the outer diameter of the outer tube 3 while maintaining the inner diameter of the inner tube 2. Therefore, the minimum bending radius of the double hose 1 can be reduced, and the hose reel for winding and storage can be made smaller.

In the above embodiment, the flexible material constituting the inner tube 2 and outer tube 3 of the double hose 1 is made by covering a fabric knitted with fibers made of a polymer compound with an elastomer. However, it is not limited to this. The flexible material constituting the inner tube 2 and the outer tube 3 may be made of synthetic material, for example, as long as it has durability against the temperature and pressure of the liquid to be conveyed, and is flexible enough to withstand repeated bending. It may be a material consisting only of resin or a material containing natural rubber. Furthermore, a flexible metal bellows tube is not preferred as a flexible material for forming the inner tube 2 and outer tube 3 from the viewpoint of mechanical properties and manufacturing costs.

Furthermore, in the embodiment described above, low-temperature liquids such as liquefied natural gas, liquefied carbon dioxide, and liquefied ammonia are used as the fluid conveyed by the double hose 1. It is also possible to transport liquids and gases at temperatures above ℃. Dual hoses have an insulating layer and are therefore particularly advantageous when there is a large difference between the temperature of the fluid being conveyed and the temperature at the location where the duplex hose is installed.

1 Double hose 2 Inner tube 3 Outer tube 4 Heat insulating layer 10 End device 11 Inner tube side tube member 11c Inner tube side flange for closing member 12 Inner tube side close member 12a Contact member 12b Connection member 13 Outer tube side tube Member 13b Outer tube side flange portion for closing member 14 Outer tube side close contact member 14a Contact member 14b Connecting member 15 Sealing structure 15c, 15h Closing member

Claims (5)

An end device attached to the end of a dual hose having an inner tube and an outer tube each made of a flexible material, the end device comprising:
an inner tube side cylinder member inserted into the inner peripheral side of the inner tube;
an inner tube side contact member that is provided on the outer peripheral side of the inner tube into which the inner tube side cylindrical member is inserted and brings the inner tube into close contact with the outer peripheral surface of the inner tube side cylindrical member;
an outer tube side cylindrical member provided on the outer circumferential side of the inner tube and inserted into the inner circumferential side of the outer tube;
an outer tube-side close contact member that is provided on the outer circumferential side of the outer tube into which the outer tube-side cylindrical member is inserted and brings the outer tube into close contact with the outer circumferential surface of the outer tube-side cylindrical member;
a sealed structure that seals a heat insulating layer between the inner tube and the outer tube,
The inner tube-side contact member is disposed in a portion of the inner tube that extends axially outward from the outer tube-side cylinder member. The inner tube side close contact member has a plurality of abutting members whose surfaces that abut the inner tube extend in an arc shape, and a plurality of connecting members that connect the ends of the adjacent abutting members, Consisting of a circular structure,
The outer tube-side close contact member includes a plurality of abutting members whose surfaces that abut the outer tube extend in an arc shape, and a plurality of connecting members that connect the ends of the adjacent abutting members, The end device according to claim 1, having an annular configuration. The inner tube side cylindrical member is provided with an inner tube side flange portion that extends radially outward in the circumferential direction from a portion located axially outer than the end of the outer tube,
The outer tube side cylindrical member is provided with an outer tube side flange portion that extends radially outward in the circumferential direction from a portion located axially inner than the inner tube side flange portion,
The end device according to claim 1, wherein the sealing structure includes a cylindrical closing member that closes a gap between the inner tube side flange portion and the outer tube side flange portion in the circumferential direction. The end device according to claim 1, wherein the heat insulating layer has an average thickness of 20 mm or less. A double hose comprising an end device according to any one of claims 1 to 4.

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