CN115163343A

CN115163343A - Vacuum heat insulation pipe

Info

Publication number: CN115163343A
Application number: CN202210792794.4A
Authority: CN
Inventors: 李善雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-12
Filing date: 2022-07-07
Publication date: 2022-10-11

Abstract

The invention relates to the technical field of ship transmission equipment, in particular to a vacuum heat-insulation pipe, which comprises short pipes, wherein each short pipe comprises an inner pipe and an outer pipe; the joint part is arranged on the outer pipe, and the joint part is arranged on the outer pipe; the outer surface of the inner pipe is connected with a joint part, the joint part is including connecting in the inboard annular heavy-calibre ring in outer tube both ends, the inner tube periphery is connected with annular the small-calibre ring, it has the connecting pipe to peg graft between inner tube and the outer tube, the supporting part includes first fastening portion, first subassembly, first elastic part, first splenium and first supporter, the supporting part still includes second fastening portion, the second subassembly, second elastic part, second splenium and second supporter, the supporting part still includes first holding strip, second holding strip and equipment means, the equipment means includes the bolt, this application has the thermal effect that can reduce outside pipeline to inside pipe transmission.

Description

Vacuum heat insulation pipe

Technical Field

The invention relates to the technical field of ship transmission equipment, in particular to a vacuum heat insulation pipe.

Background

In general, a vacuum heat insulation duct having a double duct structure in which an inner duct for supplying fuel gas is surrounded by an outer duct with a certain space therebetween is used for supplying fuel gas such as LNG to an engine of a ship. Also, a vacuum is formed between the inner and outer tubes, minimizing heat transfer from the inner tube. The vacuum heat insulation pipe is difficult to be directly processed and installed on site, so that a factory processes short pipes with double pipeline structures in advance and then connects a plurality of short pipes on site to lay pipelines. The vacuum heat insulation pipe is connected by a plug-in connection method and a welding sleeve method, and the welding sleeve method is generally used.

As shown in fig. 1, a conventional vacuum heat insulation pipe is constructed by continuously connecting and laying short pipes (3) composed of an inner pipe (1) for transferring ultra-low temperature LNG and an outer pipe (2) inserted into and accommodating the inner pipe (1) on site. Furthermore, a vacuum insulation layer is formed between the outer tube (2) and the inner tube (1). At this time, since the inner pipe (1) is exposed to the outside of both ends of the outer pipe (2), the exposed inner pipe (1) is butted and welded when each short pipe is connected in the field. The portion connected with the inner pipe (1) is wrapped by a cylindrical welding sleeve (4), so that a vacuum heat insulation layer is formed in the welding sleeve (4). In addition, the inner pipe is formed with a corrugated pipe (1 a) in the middle to cope with contraction and expansion. In the conventional vacuum heat insulation pipe, the end of the outer pipe (2) is coupled to the inner pipe (1) via a coupling part (5), so that heat is transferred from the outer pipe to the inner pipe, and the shorter the length of the pipe, the faster the transfer speed. Furthermore, since the sleeve is welded to the outer pipe in the field, the welding heat is directly transferred to the outer pipe, thereby affecting the vacuum state within the outer pipe. Further, a structure capable of improving the heat insulating effect of the vacuum heat insulating layer is also required.

Among the above-mentioned technical scheme, the outer pipeline can influence the gaseous temperature of fuel of inner tube transmission to inside pipeline heat transfer, needs to reduce the influence to the gaseous temperature of fuel in the transmission course now.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a vacuum heat insulation pipe.

The technical scheme of the invention is as follows:

in one aspect, the present invention provides a vacuum insulation pipe comprising short pipes including an inner pipe for transporting fuel gas and an outer pipe surrounding the inner pipe and forming a vacuum therein, a joint being formed where the two short pipes are joined to each other; the sleeve is arranged on the outer pipe of the short pipe, the inner pipe is fixedly connected with the outer pipe of the short pipe, the joint part is formed between the inner pipe and the outer pipe, and the joint part is fixedly connected with the outer pipe of the short pipe;

the outer surface of the inner pipe is connected with a joint part, the joint part is connected with two ends of the outer pipe, the joint part comprises an annular large-caliber ring connected to the inner sides of two ends of the outer pipe, the periphery of the inner pipe is connected with an annular small-caliber ring, a connecting pipe is inserted between the inner pipe and the outer pipe, the large-caliber ring and the small-caliber ring are connected to the connecting pipe, and the cross section of the joint part is in the shape of a circle

Shaping;

the supporting part comprises a semicircular first fastening part abutted to the outer peripheral surface of the inner pipe, first components integrally formed at two ends of the first fastening part, a first elastic part integrally formed on the first components, a first pressurizing part integrally formed on the first elastic part and a first strip-shaped supporting body, the first components are bent, the first elastic part is positioned on one surface, towards the inner side, of the first components, and the first pressurizing part is abutted to the inner side surface of the outer pipe;

the supporting part also comprises a semicircular second fastening part abutted against the outer peripheral surface of the inner pipe, a second assembly integrally formed at two ends of the second fastening part, a second elastic part integrally formed on the second assembly, a second pressing part integrally formed on the second elastic part and a second strip-shaped supporting body, the second assembly is bent, the second elastic part is positioned on one surface of the second assembly towards the inner side, and the second pressing part is abutted against the inner side surface of the outer pipe;

the support portion further includes a first fastening strip attached to the first module, a second fastening strip attached to the second module, and an assembling means for coupling the first module and the second module, the assembling means including bolts penetrating both ends of the first fastening strip and the second fastening strip, the bolts applying a clamping force to the first fastening strip and the second fastening strip.

The invention achieves the following beneficial effects: length image of joint portion for joining outer tube and inner tube

The heat transfer of the outer pipe to the inner pipe is delayed to the maximum extent, and the heat transfer is reduced to the maximum extent.

Further, a lantern ring is connected between the outer peripheral surface of the outer pipe and the tail end of the sleeve, and the lantern ring is located between the large-caliber ring and the small-caliber ring.

In another aspect, the present invention provides a vacuum insulation pipe comprising short pipes including an inner pipe for transporting fuel gas and an outer pipe surrounding the inner pipe and forming a vacuum therein, wherein a joint is formed at a junction of the two short pipes; the two ends of the sleeve are respectively and fixedly connected with the outer tubes of the two short tubes, vacuum is formed in the sleeve, and a plurality of supporting parts are fixedly connected between the inner tube and the outer tube;

the supporting part comprises a semicircular first fastening part abutted to the outer peripheral surface of the inner pipe, first assemblies integrally formed at two ends of the first fastening part, a first elastic part integrally formed on the first assemblies, a first pressing part integrally formed on the first elastic part and a first strip-shaped supporting body, the first assemblies are bent, the first elastic part is positioned on one surface, facing inwards, of the first assemblies, and the first pressing part is abutted to the inner side surface of the outer pipe;

the support portion further includes a first fastening strip mounted on the first module, a second fastening strip mounted on the second module, and an assembling means for coupling the first module and the second module, the assembling means including bolts penetrating both ends of the first fastening strip and the second fastening strip, the bolts applying a clamping force to the first fastening strip and the second fastening strip.

Further, a powdery powder heat insulating material is filled between the inner pipe and the outer pipe, the powder heat insulating material is located between the sleeve and the joint portion, and the powder heat insulating material is any one of perlite, diatomaceous earth and aluminum powder.

Further, the outer circumferential surface of the inner pipe is surrounded by a plurality of layers of heat insulating materials formed by alternately stacking aluminum foils and glass wool.

Further, the first fastening strip comprises a first curved surface portion abutting against the first component and a first flat surface portion facing the outer tube, the second fastening strip comprises a second curved surface portion abutting against the second component and a second flat surface portion facing the outer tube, and the cross sections of the first fastening strip and the second fastening strip are semicircular.

Further, the first support body and the second support body are both made of CFRP materials, and the outer surfaces of the first support body and the second support body are both coated with CFRP materials.

Furthermore, a circular supporting heat-insulating material is inserted between the first fastening part and the second fastening part.

The vacuum heat insulation pipe has the following advantages:

1. length image of joint portion for joining outer tube and inner tube

The heat transfer of the outer pipe to the inner pipe is delayed to the maximum extent, and the heat transfer is reduced to the maximum extent;

2. placing a collar for hermetically bonding the sleeve and the outer pipe at the bonding portion, thereby slowing down the heat transfer of the weld generated when the sleeve is welded to the outer pipe and maximally slowing down the heat transfer of the sleeve to the inner pipe, thereby minimizing the heat transfer;

3. powder heat insulation materials are filled in the outer pipe and the sleeve or the periphery of the inner pipe is wrapped by a plurality of layers of heat insulation materials, so that the heat insulation effect can be improved compared with the simple vacuum heat insulation;

4. by inserting a supporting heat insulating material between the inner pipe and the supporting portion, it is possible to block heat transfer from the supporting portion to the inner pipe.

Drawings

FIG. 1 is a sectional view of a vacuum insulation tube of the background art;

FIG. 2 is a sectional view of the whole vacuum insulation tube according to the embodiment;

FIG. 3 is a schematic view of a support portion of a vacuum insulation tube according to an embodiment;

FIG. 4 is a cross-sectional view of a support and duct of an embodiment of a vacuum insulation tube;

FIG. 5 is a sectional view of a vacuum insulation tube according to a second embodiment;

FIG. 6 is a sectional view of a vacuum insulation tube according to a third embodiment;

FIG. 7 is a sectional view of a multi-layered heat insulating material of the third vacuum heat insulating pipe of the embodiment;

FIG. 8 is a cross-sectional view of an embodiment of a four vacuum insulation tube;

FIG. 9 is a sectional view of a projected section A of a four-vacuum insulation pipe according to an embodiment;

FIG. 10 is a sectional view of a projected B section of a four-stage vacuum insulation pipe according to an embodiment.

In the figure, 100, short tubes; 110. an inner tube; 111. a bellows; 112. a joint portion; 120. an outer tube; 121. a vacuum port; 122. a powder fill port; 130. a bonding section; 131. a large-caliber ring; 132. a small-caliber ring; 133. a connecting pipe; 130A, a total baffle part; 131A, a first partition part; 132A, a second partition portion; 133A, a silicon material; 200. a sleeve; 210. a collar; 220. a vacuum port; 230. a powder fill port; 300. a support portion; 310. a first support; 311. a first fastening portion; 312. a first component; 313. a first elastic part; 314. a first pressurizing portion; 315. a first insulator; 320. a second support; 321. a second fastening portion; 322. a second component; 323. a second elastic part; 324. a second pressurizing part; 325. a second insulator; 330. an assembling means; 331. a first fastening strip; 331a, a first curved surface portion; 331b, a first plane part; 332. a second fastening strip; 332a, a second curved surface portion; 332b, a second flat surface portion; 333. a bolt; 400. a powdered thermal insulation material; 500. a plurality of layers of thermal insulation material; 600. supporting the insulation material.

Detailed Description

To facilitate an understanding of the invention for those skilled in the art, a specific embodiment thereof will be described below with reference to the accompanying drawings.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The first embodiment,

The present invention provides a vacuum insulation pipe, as shown in fig. 2, comprising a short pipe 100, the short pipe 100 comprising an inner pipe 110 and an outer pipe 120. The junction 130 is formed at the junction of the two short pipes 100, and the sleeve 200 surrounds the junction 130. A plurality of supporting parts 300 are fixedly connected between the inner tube 110 and the outer tube 120. The support portion 300 serves to support the inner tube 110.

The inner tube 110 and the outer tube 120 may be tubular in shape, and the outer tube 120 has an inner diameter greater than an outer diameter of the inner tube 110, so that the inner tube 110 is inserted and received inside the outer tube 120.

The inner pipe 110 has a length longer than that of the outer pipe 120, and the inner pipe 110 protrudes and is exposed from both ends of the outer pipe 120.

The joint portions 130 are fixedly connected between both ends of the outer pipe 120 and the inner pipe 110, and the joint portions 130 are used to respectively join both ends of the outer pipe 120 to the outer circumferential surface of the inner pipe 110. The joint 130 includes a large-diameter ring 131, a small-diameter ring 132, and a connection pipe 133.

The large-caliber ring 131 is ring-shaped or washer-shaped, the outer diameter of the large-caliber ring 131 is the same as the inner diameter of the outer tube 120, the large-caliber ring 131 is fixedly connected to the inner side surfaces of the two ends of the outer tube 120, and the inner diameter of the large-caliber ring 131 is larger than the outer diameter of the inner tube 110.

The small-caliber ring 132 is annular or washer-shaped, the inner diameter of the small-caliber ring 132 is the same as the outer diameter of the inner tube 110, the small-caliber ring 132 is fixedly connected to the outer circumferential surface of the inner tube 110, and the outer diameter of the small-caliber ring 132 is smaller than the inner diameter of the outer tube 120.

The connection pipe 133 has a circular pipe shape, and the connection pipe 133 is inserted between the outer pipe 120 and the inner pipe 110. The inner diameter of the connection pipe 133 is larger than the outer diameter of the inner pipe 110, and the outer diameter of the connection pipe 133 is smaller than the inner diameter of the outer pipe 120.

One end of the connecting pipe 133 is fixedly connected to the large-diameter ring 131, and the other end of the connecting pipe 133 is fixedly connected to the small-diameter ring 132.

The inner diameter of the large-diameter ring 131 is equal to the outer diameter of the small-diameter ring 132, and when one end of the connection pipe 133 is connected to the large-diameter ring 131, the other end of the connection pipe 133 can be connected to the outer diameter of the small-diameter ring 132.

The cross section of the joint part 130 is

And (4) shaping.

Since the joint 130 has such a structure, heat of the outer tube 120 exposed to the atmosphere can be prevented from being rapidly transferred to the inner tube 110. In other words, since the length of the joint 130 is long, the transfer of heat to the inner pipe 110 along the path of the joint 130 may be delayed.

Since the ultra-low temperature fuel gas is supplied into the inner tube 110, it is necessary to prevent the fine heat transfer that may occur. A plurality of spools 100 may be manufactured in a factory and moved to an installation site to perform pipe laying.

After the adjacent short pipes 100 are butted, welding is performed, that is, the inner pipes 110 of the adjacent short pipes 100 are welded, so that the adjacent short pipes 100 are connected to each other.

The inner pipe 110 is fixedly connected with a bellows 111, and the bellows 111 communicates with the inner pipe 110. The bellows 111 may be responsive to expansion and contraction.

The outer tube 120 has a plurality of vacuum ports 220 (vacuum ports 121) formed on its outer circumferential surface, and the vacuum ports 220 (vacuum ports 121) are connected to a vacuum device for discharging air. The outer tube 120 is filled with a powder heat insulating material 400, and the outer circumferential surface of the outer tube 120 is provided with a plurality of powder filling ports 230 (powder filling ports 122), and the powder filling ports 230 (powder filling ports 122) are used for filling the powder heat insulating material 400 into the outer tube 120.

The vacuum pressure inside the outer tube 120 can be reduced to about 10-3 torr.

Sleeve 200 can surround junction 130 of adjacent spools 100, with sleeve 200 being a circular tubular structure.

The outer diameter of the sleeve 200 is equal to the outer diameter of the outer tube 120.

One end of the sleeve 200 is fixedly connected to the end of the outer tube 120 on one side of the short tube 100, the other end of the sleeve 200 is fixedly connected to the end of the outer tube 120 on the other side of the short tube 100, and the sleeve 200 and the outer tube 120 are connected by welding or the like.

The sleeve 200 is also provided with a plurality of vacuum ports 220 (vacuum ports 121) on the outside thereof, and a vacuum can be formed inside the sleeve 200. The sleeve 200 is also filled with a powder heat insulating material 400. The sleeve 200 is also provided with a plurality of powder filling ports 230 (powder filling ports 122), and the powder filling ports 230 (powder filling ports 122) of the sleeve 200 are used for injecting the powder heat insulating material 400 into the sleeve 200.

As shown in fig. 3 and 4, a support portion 300 is disposed between the inner tube 110 and the outer tube 120, the support portion 300 is used to support the inner tube 110, and the support portion 300 includes a first support body 310, a second support body 320, and an assembling means 330.

The first support 310 may be in the shape of a band having a certain width, and the first support 310 is curved in a semicircular shape to support a half of the inner tube 110. The first support 310 includes a first fastening part 311, a first assembly 312, a first elastic part 313, and a first pressing part 314.

The first fastening portion 311 is a structure curved in a semicircular shape in section so as to be in close contact with the outer surface of the inner tube 110.

Both ends of the first fastening portion 311 are bent at 180 ° toward the inner side of the outer tube 120 to form a first member 312 having a semicircular section.

The first components at both ends of the first fastener respectively extend outwards to form a circular arc to form a first elastic part 313. The first elastic part 313 has elastic force spreading from both ends of the first fastening part 311.

The first elastic portion 313 extends to form a first pressing portion 314, and the first pressing portion 314 abuts against the inner side surface of the outer tube 120.

When the first pressing portion 314 abuts against the inner surface of the outer tube 120, the first pressing portion 314 strongly presses the inner surface of the outer tube 120 by the elastic force of the first elastic portion 313 to be expanded. The first fastening portion 311 can be firmly adjacent to the outer surface of the inner pipe 110 by the repulsive force.

The second supporter 320 has the same shape and structure as the first supporter 310, and the second supporter 320 and the first supporter 310 are symmetrically disposed with respect to each other centering on the inner tube 110. The first support 310 is closely attached to one half side of the inner pipe 110, and the second support 320 is closely attached to the other half side of the inner pipe 110.

The second supporting member includes a second fastening member, a second assembly 322, a second elastic part 323 and a second pressing part 324, which have the same shape and structure as the first fastening member, the first assembly 312, the first elastic part 313 and the first pressing part 314, respectively, and thus, the description thereof is omitted.

The first component 312 and the second component 322 abut each other. The first component 312 and the second component 322 are connected to each other by the assembling means 330.

The first and second supports 310 and 320 may be made of CFRP (Carbon Fiber Reinforced Plastic) material. The outer surfaces of the first support 310 and the second support 320 are coated with GFRP (Glass Fiber Reinforced Plastic). An antistatic insulator having a certain thickness is coated on the first and

second pressurization parts

314 and 324.

When the first and second pressurizing

portions

314 and 324 abut against the inner surface of the outer tube 120, friction is generated due to displacement, and there is a risk of abrasion and static electricity. The insulator is made of GFRP material, abrasion due to friction can be minimized, and generation of static electricity can be prevented.

The assembling means 330 is to assemble the first support 310 and the second support 320 by abutting the first module 312 and the second module 322 to each other. The assembling means 330 includes a first fastening strip 331, a second fastening strip 332, and a bolt 333.

The first fastening strip 331 and the second fastening strip 332 are both circular rod-shaped, the first fastening strip 331 is mounted on the first member 312, and the second fastening strip 332 is mounted on the second member 322.

The lengths of the first and second fastening strips 331 and 332 are the same as the widths of the first and

second components

312 and 322, respectively. In order to allow the bolt 333 to pass through, it is preferably longer than the width of the first block 312 and the second block 322.

The first and second fastening strips 331 and 332 are arranged in parallel, and bolts 333 are threadedly coupled to both ends of the first and second fastening strips 331 and 332. Thereby securing the first component 312 and the second component 322.

When fuel gas is abnormally leaked from the inner pipe 110, in order to remove the leaked gas as soon as possible and prevent explosion and fire from being initiated, air may be generally forcibly flowed between the outer pipe 120 and the inner pipe 110. The first and second fastening strips 331 and 332 have semicircular cross sections, which can minimize air resistance.

The cross section of the first fastening strip 331 includes a first curved surface portion 331a contacting the first member 312 and a first flat surface portion 331b contacting air. The cross section of the second fastening strip 332 includes a second curved surface portion 332a contacting the second member 322 and a second flat surface portion 332b contacting air.

The curvatures of the first curved surface part 331a and the second curved surface part 332a are the same as or similar to the inside curvatures of the first component 312 and the second component 322. The first and second fastening strips 331 and 332 are inserted and stabilized with the first and

second modules

312 and 322, respectively. If there is no gap between the first plane portion 331b and the first member 312 and between the second plane portion 332b and the second member 322, the air flows only along the first plane portion 331b and the second plane portion 332b, thereby minimizing the resistance.

The head of the bolt 333 is embedded in the first and second fastening strips 331 and 332 so as not to protrude from the first and second

flat portions

331b and 332b, thereby minimizing resistance to air. The upper surface of the head of the bolt 333 is placed on the same plane as the first flat part 331b and the second flat part 332b.

A supporting and insulating material 600 is inserted between the inner pipe 110 and the first and

second fastening portions

311 and 321.

The heat insulating material 600 is supported to prevent heat from being transferred from the outer pipe 120 to the inner pipe 110 through the support 300. The supporting and insulating member 600 has a circular ring shape, and the width of the supporting and insulating member 600 is the same as the width of the first fastening part 311 and the second fastening part 321.

It is preferable to use a special heat insulating material for the supporting and heat insulating material 600, for example, if the thermal conductivity of steel is 1, the thermal conductivity of CFRP is 1/5, but the thermal conductivity of the special heat insulating material is about 1/400, and therefore, the heat insulating effect is very excellent.

Example II,

The difference from the first embodiment is that, as shown in fig. 5, a powder heat insulating material 400 or a multi-layer heat insulating material 500 is provided between the inner pipe 110 and the outer pipe 120 in order to insulate heat between the inner pipe 110 and the outer pipe 120.

Referring back to fig. 2, the powder heat insulating material 400 may use any one of perlite, diatomaceous earth, and aluminum in a powder form. The powder heat insulating material 400 may be filled into the inside of the outer tube 120 and the sleeve 200 through the powder filling port 230 (powder filling port 122), and vacuum-operated through the vacuum port 220 (vacuum port 121). A vacuum pressure of about 10-3Torr may be maintained in the outer tube 120 at this time. The heat insulation effect can be improved.

As shown in FIG. 5, the inner pipe 110 is surrounded on its outer circumferential surface by a multi-layered heat insulating material 500. The multi-layered insulation material 500 may be alternately laminated using aluminum foil and glass wool.

The outer pipe 120 and the inside of the sleeve 200 are subjected to the vacuum insulation treatment, and the insulation effect can be maximized by the vacuum insulation and the double-insulation treatment of the multi-layered insulation material 500.

As shown in fig. 4, when the multi-layered heat insulating material 500 is used, the support and heat insulating material 600 can be inserted between the multi-layered heat insulating material 500 and the first and

second fastening parts

311 and 321.

Example III,

The difference from the first embodiment is that, as shown in fig. 6 and 7, the inner diameter of the sleeve 200 is larger than the outer diameter of the outer tube 120, so that the sleeve 200 has a structure in which the outer tube 120 is inserted and received inside.

In order to seal the sleeve 200, a collar 210 is fixedly coupled between the outer circumferential surface of the outer tube 120 and both ends of the sleeve 200. The collar 210 is in the form of a ring or washer. When assembling the sleeve 200, welding may be performed in a state where the collar 210 is inserted. The outer circumference of the collar 210 and the inner circumference of the sleeve 200 are fixedly coupled to each other, and the inner circumference of the collar 210 and the outer circumference of the outer tube 120 are welded to each other.

The collar 210 is positioned on the joint 130, and the collar 210 is positioned between the large-caliber ring 131 and the small-caliber ring 132.

The collar 210 is welded to the joint 130, and then the sleeve 200 and the collar 210 are welded.

Since the sleeve 200 is also exposed to the atmosphere, the heat of the sleeve 200 can be transmitted to the inner pipe 110 through the outer pipe 120 and the joint 130, and thus the heat transmission is delayed by providing the joint 130.

Example four,

The difference from the first embodiment is that, as shown in fig. 8 and 9, the inner tube 110 and the outer tube 120 may be tubular, the inner diameter of the outer tube 120 is larger than the outer diameter of the inner tube 110, and the inner tube 110 is inserted and received in the outer tube 120. The length of the inner pipe 110 is longer than that of the outer pipe 120, the inner pipe 110 and both ends of the outer pipe 120, and the inner pipe 110 protrudes and is exposed from both ends of the outer pipe 120.

A total partition portion 130A is abutted between the inner sides of both ends of the outer tube 120 and the outer side of the inner tube 110, and the total partition portion 130A is used to partition the cross section of the space between the inner tube 110 and the outer tube 120. The overall partition portion 130A includes a first partition portion 131A, a second partition portion 132A, and a silicon material 133A.

As shown in fig. 8, the first separator part 131A may be made of PEEK material having heat resistance, hydrolysis resistance and mechanical strength, flame retardancy or electrical characteristics, and the first separator part 131A serves to seal half surfaces of the space between the inner tube 110 and the outer tube 120. The first partition portion 131A has an annular half-surface shape.

As shown in fig. 8 and 10, the first separator 131A has a circular half-shape and blocks a cross section between the inner pipe 110 and the outer pipe 120, thereby minimizing heat transfer from the outer pipe 120 to the inner pipe 110 while maximizing thermal insulation and supporting ability.

The second partition portion 132A is made of PEEK material and is disposed symmetrically to the first partition portion 131A, and the second partition portion 132A has a half-surface shape of a circular ring. The second partition portion 132A blocks a cross section between the inner pipe 110 and the outer pipe 120 in a half-circular shape, thereby maximizing a heat insulating effect and a supporting capability while minimizing heat transfer from the outer pipe 120 to the inner pipe 110.

The silicon material 133A is an insulating material having high elasticity and high adhesion, the silicon material 133A is coated on outer edges of the first and

second separator portions

131A and 132A, and the silicon material 133A seals gaps of the first and

second separator portions

131A and 132A.

The total barrier portion 130A is formed in a ring shape having a thickness. The total barrier portion 130A prevents heat of the outer tube 120 exposed to the atmosphere from being rapidly transferred to the inner tube 110. Since the separator portion is an insulator, heat transfer to the inner tube 110 along the path of the separator portion can be minimized.

The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A vacuum insulation tube, characterized in that: the fuel gas nozzle comprises a short pipe (100), wherein the short pipe (100) comprises an inner pipe (110) used for conveying fuel gas and an outer pipe (120) which surrounds the inner pipe (110) and forms vacuum inside, and a joint part (112) is formed at the joint of the two short pipes (100); the sleeve (200) surrounds the joint part (112), two ends of the sleeve (200) are respectively and fixedly connected with the outer pipes (120) of the two short pipes (100), vacuum is formed in the sleeve (200), and a plurality of supporting parts (300) are fixedly connected between the inner pipe (110) and the outer pipe (120) together;

the outer surface of the inner pipe (110) is connected with a combination part (130), the combination part (130) is connected with two ends of the outer pipe (120), the combination part (130) comprises annular large-caliber rings (131) connected to the inner sides of two ends of the outer pipe (120), the periphery of the inner pipe (110) is connected with annular small-caliber rings (132), a connecting pipe (133) is inserted between the inner pipe (110) and the outer pipe (120), the large-caliber rings (131) and the small-caliber rings (132) are connected to the connecting pipe (133), and the cross section of the combination part (130) is in the shape of a cross section

Shaping;

the supporting part (300) comprises a semicircular first fastening part (311) abutted to the outer peripheral surface of the inner pipe (110), first components (312) integrally formed at two ends of the first fastening part (311), a first elastic part (313) integrally formed on the first components (312), a first pressing part (314) integrally formed on the first elastic part (313) and a strip-shaped first supporting body (310), the first components (312) are bent, the first elastic part (313) is positioned on one surface of the first components punched to the inner side, and the first pressing part (314) is abutted to the inner side surface of the outer pipe (120);

the supporting part (300) further comprises a semicircular second fastening part (321) abutted against the outer peripheral surface of the inner pipe (110), a second assembly (322) integrally formed at two ends of the second fastening part (321), a second elastic part (323) integrally formed on the second assembly (322), a second pressurizing part (324) integrally formed on the second elastic part (323), and a second strip-shaped supporting body (320), wherein the second assembly (322) is bent, the second elastic part (323) is positioned on one surface, punched inwards, of the second assembly, and the second pressurizing part (324) is abutted against the inner side surface of the outer pipe (120);

the support portion (300) further includes a first fastening strip (331) mounted on the first component (312), a second fastening strip (332) mounted on the second component (322), and an assembling means (330) for coupling the first component (312) and the second component (322), the assembling means (330) including a bolt (333) penetrating both ends of the first fastening strip (331) and the second fastening strip (332), the bolt (333) exerting a clamping force on the first fastening strip (331) and the second fastening strip (332).

2. The vacuum insulation tube according to claim 1, wherein: a lantern ring (210) is connected between the outer peripheral surface of the outer pipe (120) and the tail end of the sleeve (200), and the lantern ring (210) is located between the large-caliber ring (131) and the small-caliber ring (132).

3. A vacuum insulation pipe, characterized in that: the fuel gas pipeline comprises a short pipe (100), wherein the short pipe (100) comprises an inner pipe (110) used for conveying fuel gas and an outer pipe (120) which surrounds the inner pipe (110) and forms vacuum inside, and a joint part (112) is formed at the joint of the two short pipes (100); the sleeve (200) surrounds the joint part (112), two ends of the sleeve (200) are respectively and fixedly connected with the outer pipes (120) of the two short pipes (100), vacuum is formed inside the sleeve (200), and a plurality of supporting parts (300) are fixedly connected between the inner pipe (110) and the outer pipe (120) together;

the supporting part (300) further comprises a semicircular second fastening part (321) abutted to the outer peripheral surface of the inner pipe (110), a second assembly (322) integrally formed at two ends of the second fastening part (321), a second elastic part (323) integrally formed on the second assembly (322), a second pressurizing part (324) integrally formed on the second elastic part (323), and a second strip-shaped supporting body (320), wherein the second assembly (322) is bent, the second elastic part (323) is located on one surface of the second assembly (322) which is punched to the inner side, and the second pressurizing part (324) is abutted to the inner side surface of the outer pipe (120);

4. The vacuum insulation tube according to claim 1 or 3, wherein: and a powdery powder heat insulation material (400) is filled between the inner pipe (110) and the outer pipe (120), the powder heat insulation material (400) is positioned between the sleeve (200) and the joint part (130), and the powder heat insulation material (400) is any one of perlite, diatomite and aluminum powder.

5. The vacuum insulation tube according to claim 1 or 3, wherein: the outer circumferential surface of the inner pipe (110) is surrounded by a plurality of layers of heat insulating materials (500), and the plurality of layers of heat insulating materials (500) are formed by alternately stacking aluminum foils and glass wool.

6. The vacuum insulation tube according to claim 1 or 3, wherein: the first fastening strip (331) comprises a first curved surface portion (331 a) abutting against the first component (312) and a first flat surface portion (331 b) facing towards the outer tube (120), the second fastening strip (332) comprises a second curved surface portion (332 a) abutting against the second component (322) and a second flat surface portion (332 b) facing towards the outer tube (120), and the cross-sections of the first fastening strip (331) and the second fastening strip (332) are semicircular.

7. The vacuum insulation tube according to claim 6, wherein: the first support body (310) and the second support body (320) are both made of CFRP materials, and the outer surfaces of the first support body (310) and the second support body (320) are both coated with CFRP materials.

8. The vacuum insulation pipe according to claim 1 or 2, wherein: and a circular supporting and heat insulating material (600) is inserted between the first fastening part (311) and the second fastening part (321).