CN110966465A - Marine natural gas storage tank double-layer pipeline and manufacturing method thereof - Google Patents
Marine natural gas storage tank double-layer pipeline and manufacturing method thereof Download PDFInfo
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- CN110966465A CN110966465A CN201811152334.5A CN201811152334A CN110966465A CN 110966465 A CN110966465 A CN 110966465A CN 201811152334 A CN201811152334 A CN 201811152334A CN 110966465 A CN110966465 A CN 110966465A
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- inner pipe
- natural gas
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 92
- 239000003345 natural gas Substances 0.000 title claims abstract description 46
- 238000003860 storage Methods 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000003466 welding Methods 0.000 claims abstract description 21
- 230000000670 limiting effect Effects 0.000 claims description 36
- 238000009413 insulation Methods 0.000 claims description 20
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000005452 bending Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 229910001220 stainless steel Inorganic materials 0.000 description 15
- 239000010935 stainless steel Substances 0.000 description 15
- 239000002828 fuel tank Substances 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L7/00—Supporting of pipes or cables inside other pipes or sleeves, e.g. for enabling pipes or cables to be inserted or withdrawn from under roads or railways without interruption of traffic
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a marine natural gas storage tank double-layer pipeline and a manufacturing method thereof. The utility model provides a marine natural gas storage tank double-layer pipeline includes that inner tube and cover locate the sleeve pipe in the inner tube outside, and the inner tube is equipped with the straight portion of inner tube and inner tube bight, and the sleeve pipe includes the straight portion of sleeve pipe and sleeve pipe bight, and sleeve pipe bight corresponds the setting with inner tube bight, and the straight portion of sleeve pipe corresponds the setting with the straight portion of inner tube, and sleeve pipe bight includes a plurality of mitre pipes, and a plurality of mitre pipes weld each other the concatenation form sleeve pipe bight, connects through sleeve pipe bight between two sleeve pipe straight portions. In the natural gas storage tank double-layer pipeline and the manufacturing method thereof, the welding seams of the natural gas storage tank double-layer pipeline are a plurality of annular welding seams which are connected among a plurality of oblique pipes and connected between the oblique pipes and the straight part of the sleeve. The length of the annular welding line of the double-layer pipeline of the natural gas storage tank is far smaller than that of the axial welding line, and the double-layer pipeline of the natural gas storage tank is convenient to machine and manufacture.
Description
Technical Field
The invention relates to the field of ocean platforms, in particular to a marine natural gas storage tank double-layer pipeline and a manufacturing method thereof.
Background
CCS Natural gas Fuel powered Ship Specification 4.1.3.8 specifies that the pipeline between the C-type independent fuel tank and the first stop valve connected with the C-type independent fuel tank is equivalent to the safety level of the C-type independent fuel tank. "
In order to meet the technical specification requirements, a double-layer pipeline needs to be designed and installed, the stainless steel pipeline and the stainless steel sleeve are bent by adopting a uniform bending radius, then the stainless steel sleeve is uniformly split and halved along the axial direction, after the elbow and the stainless steel pipeline are welded, the halved stainless steel sleeve and the stainless steel pipeline are assembled and sleeved, and then welding and splicing are carried out. The stainless steel casing splice weld 100 is shown in FIG. 1, where the weld 100 extends in the axial direction of the stainless steel casing and is two. Moreover, because the number of pipelines below the highest liquid level is large, the welding and assembling workload is large in the process of manufacturing the stainless steel sleeve, the production and the manufacturing are not facilitated, and meanwhile, because deviation exists in the manufacturing process, segregation exists between the stainless steel pipeline and the stainless steel sleeve, and the later normal use is influenced.
Disclosure of Invention
The invention aims to provide a natural gas storage tank double-layer pipeline which reduces welding seams and is convenient to produce and manufacture and a manufacturing method thereof.
The utility model provides a marine natural gas storage tank double-deck pipeline, locates including inner tube and cover the sleeve pipe in the inner tube outside, the inner tube is equipped with the straight portion of inner tube and inner tube curved portion, the sleeve pipe includes the straight portion of sleeve pipe and sleeve pipe curved portion, sleeve pipe curved portion with inner tube curved portion corresponds the setting, the straight portion of sleeve pipe with the straight portion of inner tube corresponds the setting, sleeve pipe curved portion includes a plurality of mitre pipes, and is a plurality of the mitre pipe welds the concatenation each other and forms sleeve pipe curved portion, two pass through between the straight portion of sleeve pipe the sleeve pipe curved portion is connected.
In one embodiment, the diameter of the beveled tube is equal to the diameter of the straight portion of the sleeve.
In one embodiment, the inner pipe bend and the sleeve bend comprise a plurality of pipe bends.
In one embodiment, the inner diameter of the sleeve is greater than the outer diameter of the inner tube, and a gap exists between the sleeve and the inner tube.
In one embodiment, a limiting structure is arranged at an end of the inner pipe straight part, and the limiting structure is supported between the outer side wall of the inner pipe and the inner side wall of the sleeve.
In one embodiment, the number of the limiting structures is multiple, the limiting structures are kept on the same circumference, and the limiting structures mutually enclose a through hole for the straight part of the inner pipe to pass through.
In one embodiment, the limiting structure comprises a heat insulation plate and a supporting plate, the supporting plate is arranged on the inner side wall of the sleeve, one end of the heat insulation plate is connected with the supporting plate through a screw, and the other end of the heat insulation plate is abutted to the outer side wall of the inner pipe.
A manufacturing method of a double-layer pipeline of a natural gas storage tank for a ship comprises the following steps:
the linear inner pipe penetrates through a first straight sleeve part of the sleeve, the first straight sleeve part is arranged at the first straight inner pipe part of the inner pipe, and a second straight inner pipe part at the end part of the inner pipe is exposed;
bending the exposed inner pipe to form an inner pipe bending part between the first inner pipe straight part and the second inner pipe straight part;
the straight part of the second inner pipe penetrates through the plurality of oblique cutting pipes, the oblique cutting pipes are welded and connected from the end face of the straight part of the first sleeve pipe, the oblique cutting pipes are mutually welded and connected to form a sleeve pipe bent part, and the sleeve pipe bent part is matched with the inner pipe bent part;
the second inner pipe straight part penetrates through the second sleeve straight part, the end face of the second sleeve straight part is connected with the end face of the beveled pipe in a welding mode, and the second sleeve straight part is connected with the sleeve bent part.
In one embodiment, the end of the inner pipe straight portion is provided with a plurality of limiting structures, the limiting structures mutually enclose a through hole, and when the inner pipe straight portion passes through the sleeve pipe straight portion, the inner pipe straight portion needs to pass through the through hole.
In one embodiment, the number of the second inner pipe straight portion, the number of the inner pipe bent portions, the number of the sleeve bent portions, and the number of the second sleeve straight portions are two, and the two sleeve bent portions are sequentially welded between the first sleeve straight portion and the two second sleeve straight portions respectively.
In the double-layer pipeline of the natural gas storage tank and the manufacturing method thereof, the straight part of the first sleeve is sleeved in the middle of the inner pipe. And then the inner tank is bent into the shape required by the design. And respectively sleeving a plurality of oblique cutting pipes on the inner pipes. The plurality of beveled pipes are welded along the angle of the inner pipe bent portion to form a sleeve bent portion. When the manufacture of the sleeve bending part is finished, the second sleeve straight part is sleeved, and the second sleeve straight part is connected with the inclined cutting pipe in a welding mode, so that the manufacture of the double-layer pipeline is finished. In the natural gas storage tank double-layer pipeline and the manufacturing method thereof, the welding seams of the natural gas storage tank double-layer pipeline are a plurality of annular welding seams which are connected among a plurality of oblique pipes and connected between the oblique pipes and the straight part of the sleeve. Compared with the traditional manufacturing method of the double-layer pipeline of the natural gas storage tank, the length of the annular welding line of the double-layer pipeline of the natural gas storage tank is far smaller than that of the axial welding line, and the double-layer pipeline of the natural gas storage tank is convenient to machine and manufacture. Moreover, the sleeve does not need to be cut into half according to the axial direction of the sleeve, a large amount of cutting work can be reduced, and the sleeve is convenient to manufacture.
Drawings
FIG. 1 is a splice weld of a conventional double pipe casing;
fig. 2 is a schematic structural view of the marine natural gas storage tank double-walled pipe of the present embodiment;
fig. 3 is a schematic view of a supporting mechanism of the double-layered pipe of the marine natural gas tank shown in fig. 2;
fig. 4 is a flowchart of a method for manufacturing a double-walled pipe for a natural gas tank for a ship according to the present embodiment.
The reference numerals are explained below: 1. a marine natural gas storage tank double-layer pipeline; 10. an inner tube; 11. an inner tube straight portion; 111. a first inner tubular straight portion; 112. a second inner tubular straight portion; 12. an inner tube bend; 20. a sleeve; 21. a straight portion of the sleeve; 211. a first sleeve straight portion; 212. a second sleeve straight portion; 22. a sleeve bend; 221. obliquely cutting a pipe; 30. a limiting structure; 31. a heat insulation plate; 32. a support plate; 33. a fastener; 34. a waist hole.
Detailed Description
While this invention is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present description is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to that as illustrated.
Thus, a feature indicated in this specification will serve to explain one of the features of one embodiment of the invention, and does not imply that every embodiment of the invention must have the stated feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
In the embodiments shown in the drawings, directional references (such as upper, lower, left, right, front and rear) are used to explain the structure and movement of the various elements of the invention not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.
The preferred embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
Referring to fig. 2, the invention provides a marine natural gas storage tank double-layer pipeline and a manufacturing method thereof.
The marine natural gas storage tank double-layered pipeline 1 of the present embodiment includes an inner pipe 10 and a sleeve 20 fitted around the outer side of the inner pipe 10. The sleeve 20 is a stainless steel sleeve. The inner pipe 10 is a stainless steel pipe. The inner pipe 10 is used for running a natural gas medium and is used for meeting the requirements of a process system. The stainless steel pipe guarantees the intensity and the rigidity of inner tube, satisfies the operation requirement of natural gas storage tank pipeline. The sleeve 20 serves to insulate the inner pipe 10 and, at the same time, to generate leakage if cracks are generated at the connection portion of the inner pipe 10 and the joint or the connection portion of the inner pipe 10. The sleeve 20 acts as a secondary shield to prevent cryogenic natural gas from leaking to the hull deck.
Specifically, the inner pipe 10 is provided with an inner pipe straight portion 11 and an inner pipe bent portion 12. And bending and molding the inner pipe according to design requirements. The inner pipe straight part 11 is used for extending to a bending part, and the bending part is provided with an inner pipe bending part 12. The inner pipe bending part 12 enables the inner pipe straight part 11 to change the direction, and design requirements are conveniently met.
The inner tube 10 is a one-piece tube. The inner tube 10 of integral type structure can satisfy the intensity demand of inner tube to guarantee that the inner tube 10 can stably use.
The sleeve 20 includes a sleeve straight portion 21 and a sleeve bent portion 22. The sleeve bend 22 is disposed to correspond to the inner pipe bend 12. The sleeve straight portion 21 is provided corresponding to the inner pipe straight portion 11.
The casing bend 22 comprises a plurality of chamfered tubes 221. The plurality of chamfered tubes 221 are welded to each other to form the casing bend 22. The two straight portions 21 are connected by a bent portion 22.
The diameter of the beveled tube 221 is equal to the diameter of the straight portion 21 of the sleeve. The beveled tube 221 is beveled from the straight portion 21 of the sleeve. The curvature of the bent portion 22 of the casing formed by splicing the plurality of chamfered tubes 221 can be adjusted by adjusting the angle of the end surface of the chamfered tube 221.
The inner pipe bend 12 and the sleeve bend 22 include a plurality of them. In particular, in the present embodiment, the marine natural gas tank double-layered pipeline has an S-shape. Both the inner tube 10 and the sleeve 20 are S-shaped. The number of the inner pipe straight portions 11 and the number of the sleeve straight portions 21 are three. The inner-tube straight portion 11 includes a first inner-tube straight portion 111 located in the middle and second inner-tube straight portions 112 located at both ends of the first inner-tube straight portion 111. Accordingly, the straight sleeve portion 21 includes a first straight sleeve portion 211 at the middle and second straight sleeve portions 212 at both ends of the first straight sleeve portion 211.
The inner pipe bend 12 and the sleeve bend 22 are two in number. Two adjacent inner pipe straight portions 11 are connected by an inner pipe bent portion 12. Two adjacent straight portions 21 are connected by a bent portion 22.
It is understood that in other embodiments, the number of the inner pipe straight portion 11 and the sleeve straight portion 21 may be 2, 4, etc. The number of the inner pipe bent portion 12 and the sleeve bent portion 22 is 1, 2, or the like. Therefore, the shape of the double-layer pipeline of the natural gas storage tank for the ship can be triangular, wavy and the like. The shapes of the inner tube 10 and the sleeve 20 are not limited herein.
The inner diameter of the sleeve 20 is larger than the outer diameter of the inner pipe 10. The inner tube 10 is inserted into the sleeve 20, and the sleeve 20 is sleeved on the outer side of the inner tube 10. A certain gap is formed between the sleeve 20 and the inner tube 10, so that the oblique cutting tube can be conveniently sleeved into the inner tube 10.
Referring to fig. 3, a limiting structure 30 is disposed at an end of the inner tube straight portion 11. The limiting structure 30 is supported between the outer sidewall of the inner tube 10 and the inner sidewall of the sleeve 20. Moreover, the number of the limiting structures 30 is plural, and the plurality of limiting structures 30 are kept on the same circumference. Specifically, in the present embodiment, there are three limiting structures 30. The relative position of the sleeve 20 and the inner pipe 10 is adjusted to enable the inner pipe straight part 11 to pass through a through hole surrounded by the limiting structures 30. The limiting structure 30 has a limiting effect in the installation process of the inner tube 10 and the sleeve 20, and can ensure the concentricity of the inner tube 10 and the sleeve 20 in the installation process, and ensure the smooth installation of the inner tube 10 and the sleeve 20.
The position limiting structure 30 includes a heat insulation plate 31 and a support plate 32. The support plate 32 is provided on the inner side wall of the sleeve 20. It will be appreciated that the support plate 32 is fixedly welded to the inner side wall of the sleeve 20. The support plate 32 is a stainless steel plate.
One end of the heat insulation plate 31 is connected to the support plate 32 by a fastener 33. The other end of the heat insulation plate 31 abuts against the outer sidewall of the inner pipe 10. Furthermore, the heat insulation plate 31 is provided with a waist hole 34. The waist holes 34 extend in the radial direction of the inner pipe 10. The fastener 33 is arranged in the waist hole 34 in a penetrating way and can slide along the waist hole 34. The end of the heat insulation plate 31 close to the inner pipe 10 is arc-shaped. The arc shape is matched with the arc shape of the outer wall of the inner pipe 10, so that the heat insulating plate 31 can be completely abutted against the inner pipe 10. It is understood that the fastener 33 may be a bolt and a nut.
In a low-temperature use environment, since the support plate 32 is connected with the heat insulation plate 31 by the fastener 33, the displacement deformation caused by the cooling shrinkage of the inner pipe 10 is generated, and the fastener 33 can move along the extending direction of the waist hole 34 and move towards the inner pipe 10 along the radial direction of the inner pipe 10, thereby adjusting the connecting position of the support plate 32 and the heat insulation plate 31. When the inner tube 10 is deformed at low temperature, the secondary stress generated by the low-temperature shrinkage of the inner tube 10 can be released through the waist holes 34. Meanwhile, the gap of the height of the heat insulation plate 31 at least exists between the sleeve 20 and the inner pipe 10, so that the cold insulation in the later period is not influenced. The limiting structure 30 can be stably supported between the first inner pipe straight portion 111 and the first sleeve straight portion 211.
And, a plurality of limit structures 30 are symmetrically distributed along the circumferential direction of the outer sidewall of the inner tube 10. The heat insulation plates 31 of the respective position restricting structures 30 can be respectively abutted against the outer side walls of the inner pipes 10. Since the plurality of position-limiting structures 30 are symmetrically distributed along the circumference of the outer sidewall of the inner pipe 10, the heat-insulating plate 31 can also be symmetrically distributed with respect to the outer sidewall of the inner pipe 10. Therefore, the heat insulation plates 31 can be symmetrically distributed on the periphery of the inner pipe 10, the heat insulation plates 31 can stably abut against the outer side wall of the inner pipe 10, the pressure action of the heat insulation plates 31 on the inner pipe 10 is kept balanced, and the phenomenon that the inner pipe 10 is greatly deformed due to cooling to affect the normal use of the inner pipe 10 is avoided.
The gap between the sleeve 20 and the inner pipe 10 may be filled with an insulating layer. The heat preservation layer is used for preserving the heat of the marine natural gas storage tank double-layer pipeline.
Referring to fig. 4, a method for manufacturing a marine natural gas storage tank double-layer pipeline includes the following steps:
in step S11, the straight inner tube passes through the straight first sleeve portion 211 of the sleeve, the straight first sleeve portion 211 is disposed at the straight first inner tube portion 111 of the inner tube 10, and the straight second inner tube portion 112 of the inner tube end is exposed.
The first inner pipe straight portion 111 is located in the middle of the inner pipe. At this time, the inner tube 10 is still a straight tube, and the inner tube 10 can directly penetrate into the sleeve 20, so as to solve the problem of the sleeve of the first sleeve straight part 211 at the middle first inner tube straight part 111.
The end of the straight portion of inner tube is equipped with a plurality of limit structure 30, and a via hole is enclosed into each other to a plurality of limit structure 30. When the first inner pipe straight portion 111 passes through the first sleeve straight portion 211, the first inner pipe straight portion 111 needs to pass through the through hole.
The end of the first inner pipe straight part 111 is connected with the first sleeve straight part 211 by the limiting structure 30. The limiting structure 30 has a limiting effect during the installation process of the inner tube 10 and the sleeve 20, so as to ensure the concentricity of the inner tube 10 and the sleeve 20.
When the first inner pipe straight portion 111 is cooled and contracted, the limiting structure 30 can be stably supported between the first inner pipe straight portion 111 and the first sleeve pipe straight portion 211. The first inner pipe straight part 111 is prevented from being seriously deformed, and the stable support between the inner pipe 10 and the sleeve 20 is prevented from being influenced.
In step S12, the two ends of the exposed inner tube 10 are bent to form the inner tube bent portion 12 between the first inner tube straight portion 111 and the second inner tube straight portion 112.
The inner tube 10 is bent into an S-shape or other shape according to the design requirements. Specifically, in the present embodiment, there are two inner pipe bent portions 12, which are located at both ends of the first inner pipe straight portion 111. Then, both ends of the inner tube 10 are linear, i.e., two second inner-tube straight portions 112 are formed.
At this time, the second inner pipe straight portions 112 at the two ends of the inner pipe 10 are exposed, and can be directly bent, thereby facilitating the operation.
In step S13, the second inner pipe straight portion 112 passes through the plurality of chamfered tubes 221, the chamfered tubes 221 are welded from the end surface of the first sleeve straight portion 211, the plurality of chamfered tubes 221 are welded to each other to connect the sleeve bent portion 22, and the sleeve bent portion 22 is fitted to the inner pipe bent portion 12.
The chamfered tube 221 includes a plurality of tubes. The first oblique cutting pipe can be directly sleeved at the end of the first sleeve straight part 211, one end face of the first oblique cutting pipe is welded with the end face of the first sleeve straight part 211, and the welding seam 23 surrounds the end face of the first sleeve straight part. The second beveled pipe is sleeved on the bent part 12 of the inner pipe and is welded with the end face of the other end of the first beveled pipe, and the welding seam 23 is also annular.
The inner pipe bent portion 12 and the sleeve bent portion 22 are both provided. The number of the second inner-tube straight portions 112 is also two, and a plurality of the chamfered tubes 221 need to be respectively sleeved at the free ends of the two second inner-tube straight portions 112.
It is understood that, in other embodiments, when the number of the beveled pipes 221 is small and the radian of the corresponding formed sleeve bent portion 22 is small, the beveled pipes 221 may be welded and spliced to form the sleeve bent portion 22, and then the sleeve bent portion 22 is sleeved on the inner pipe 10 and welded to the first inner pipe straight portion 111.
In step S14, the second inner pipe straight portion 112 penetrates the second sleeve straight portion 212, and the end surface of the second sleeve straight portion 212 is welded to the end surface of the beveled pipe 221, so that the second sleeve straight portion 212 is connected to the sleeve bent portion 22.
When the end surfaces of the two sleeve bent portions 22 are welded to the two ends of the first sleeve straight portion 211, the second sleeve straight portion 212 is inserted into the second inner tube straight portion 112, and the second sleeve straight portion 212 is welded to the end surface of the other end of the sleeve bent portion 22.
Also, the connection between the second inner straight tube portion 112 and the second straight sleeve portion 212 operates similarly to when the first inner straight tube portion 111 and the first straight sleeve portion 211 are connected to each other. The end of the second inner pipe straight portion 112 is provided with a plurality of limiting structures 30. When the second inner-tube straight portion 112 passes through the second-sleeve straight portion 212, the second inner-tube straight portion 112 needs to pass through the through hole defined by the plurality of limiting structures 30. The end of the second inner pipe straight part 112 is connected with the second sleeve straight part 212 by the limiting structure 30. When the second inner pipe straight portion 112 is cooled and contracted, the limiting structure 30 can be stably supported between the second inner pipe straight portion 112 and the second sleeve straight portion 212.
Specifically, two second casing straight portions 212 are provided, and the two second casing straight portions 212 are respectively connected to the two casing bent portions 22 by welding.
In the above natural gas storage tank double-layer pipeline 1 and the manufacturing method thereof, the welding seam of the natural gas storage tank double-layer pipeline 1 is a plurality of annular welding seams which are connected between a plurality of oblique pipes 221 and connected between the oblique pipes 221 and the straight part 21 of the sleeve. Compared with the traditional manufacturing method of the double-layer pipeline of the natural gas storage tank, the length of the annular welding line of the double-layer pipeline 1 of the natural gas storage tank is far smaller than that of the axial welding line, and the processing and the manufacturing are convenient. Moreover, the sleeve 20 does not need to be cut into half according to the axial direction of the sleeve, and meanwhile, a large amount of cutting work can be reduced, and the manufacturing is convenient.
While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. The utility model provides a marine natural gas storage tank double-deck pipeline, its characterized in that is located including inner tube and cover the sleeve pipe in the inner tube outside, the inner tube is equipped with the straight portion of inner tube and inner tube bight, the sleeve pipe includes the straight portion of sleeve pipe and sleeve pipe bight, sleeve pipe bight with inner tube bight corresponds the setting, the sleeve pipe straight with the straight portion of inner tube corresponds the setting, sleeve pipe bight includes a plurality of mitre pipes, and is a plurality of the mitre pipe welds each other and splices formation sleeve pipe bight, two pass through between the straight portion of sleeve pipe the sleeve pipe bight is connected.
2. The marine natural gas tank double pipe of claim 1, wherein the diameter of the beveled pipe is equal to the diameter of the straight portion of the sleeve.
3. The marine natural gas tank double pipe according to claim 1, wherein the inner pipe bend and the sleeve bend comprise a plurality of.
4. The marine natural gas tank double pipe of claim 1, wherein the inner diameter of the sleeve is larger than the outer diameter of the inner pipe, and a gap exists between the sleeve and the inner pipe.
5. The marine natural gas tank double-layer pipeline according to claim 1, wherein a limiting structure is arranged at the end part of the inner pipe straight part, and the limiting structure is supported between the outer side wall of the inner pipe and the inner side wall of the sleeve.
6. The marine natural gas storage tank double-layer pipeline according to claim 5, wherein the number of the limiting structures is multiple, the limiting structures are kept on the same circumference, and the limiting structures mutually enclose a through hole for the inner pipe straight part to pass through.
7. The marine natural gas storage tank double-layer pipeline according to claim 5, wherein the limiting structure comprises a heat insulation plate and a support plate, the support plate is arranged on the inner side wall of the sleeve, one end of the heat insulation plate is connected with the support plate through a fastener, and the other end of the heat insulation plate is abutted to the outer side wall of the inner pipe.
8. A manufacturing method of a double-layer pipeline of a natural gas storage tank for a ship comprises the following steps:
the linear inner pipe penetrates through a first straight sleeve part of the sleeve, the first straight sleeve part is arranged at the first straight inner pipe part of the inner pipe, and a second straight inner pipe part at the end part of the inner pipe is exposed; bending the exposed inner pipe to form an inner pipe bending part between the first inner pipe straight part and the second inner pipe straight part;
the straight part of the second inner pipe penetrates through the plurality of oblique cutting pipes, the oblique cutting pipes are welded and connected from the end face of the straight part of the first sleeve pipe, the oblique cutting pipes are mutually welded and connected to form a sleeve pipe bent part, and the sleeve pipe bent part is matched with the inner pipe bent part;
the second inner pipe straight part penetrates through the second sleeve straight part, the end face of the second sleeve straight part is connected with the end face of the beveled pipe in a welding mode, and the second sleeve straight part is connected with the sleeve bent part.
9. The method for manufacturing the marine natural gas storage tank double-layer pipeline as claimed in claim 8, wherein a plurality of limiting structures are arranged at the end of the inner pipe straight part, the limiting structures mutually enclose a through hole, and when the inner pipe straight part passes through the sleeve straight part, the inner pipe straight part needs to pass through the through hole.
10. The method for manufacturing the marine natural gas storage tank double-layer pipeline as claimed in claim 8, wherein the number of the second inner pipe straight portion, the number of the inner pipe bent portions, the number of the sleeve bent portions, and the number of the second sleeve straight portions are two, and the two sleeve bent portions are sequentially welded between the first sleeve straight portion and the two second sleeve straight portions respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152334.5A CN110966465A (en) | 2018-09-29 | 2018-09-29 | Marine natural gas storage tank double-layer pipeline and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152334.5A CN110966465A (en) | 2018-09-29 | 2018-09-29 | Marine natural gas storage tank double-layer pipeline and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110966465A true CN110966465A (en) | 2020-04-07 |
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|---|---|---|---|
| CN201811152334.5A Withdrawn CN110966465A (en) | 2018-09-29 | 2018-09-29 | Marine natural gas storage tank double-layer pipeline and manufacturing method thereof |
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|---|---|
| CN (1) | CN110966465A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412370A (en) * | 2021-12-23 | 2022-04-29 | 中国原子能科学研究院 | Pipe group structure for deep well |
| CN114811270A (en) * | 2020-07-10 | 2022-07-29 | 中国兵器工业第五九研究所 | High-efficiency heat-preservation and heat-insulation material and preparation method thereof |
| CN117020590A (en) * | 2023-10-08 | 2023-11-10 | 核工业西南物理研究院 | Manufacturing method of special pipe with interlayer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482088A (en) * | 1993-07-09 | 1996-01-09 | Christopher G. Ziu | Supports double-containment systems with axial-guiding and flexibility |
| CN102900911A (en) * | 2012-09-21 | 2013-01-30 | 三一重工股份有限公司 | Double-layer connecting bent pipe, double material pipe and connecting method of double material pipe |
| KR20140000402U (en) * | 2012-07-09 | 2014-01-20 | 삼성중공업 주식회사 | Double pipe |
| KR20160015687A (en) * | 2014-07-31 | 2016-02-15 | 정우이앤이 주식회사 | Fuel gas double pipe for ship |
| CN105546232A (en) * | 2016-02-01 | 2016-05-04 | 中航鼎衡造船有限公司 | Double-wall pipe for dual-fuel propelling ship |
| CN108266289A (en) * | 2017-01-04 | 2018-07-10 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe |
-
2018
- 2018-09-29 CN CN201811152334.5A patent/CN110966465A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482088A (en) * | 1993-07-09 | 1996-01-09 | Christopher G. Ziu | Supports double-containment systems with axial-guiding and flexibility |
| KR20140000402U (en) * | 2012-07-09 | 2014-01-20 | 삼성중공업 주식회사 | Double pipe |
| CN102900911A (en) * | 2012-09-21 | 2013-01-30 | 三一重工股份有限公司 | Double-layer connecting bent pipe, double material pipe and connecting method of double material pipe |
| KR20160015687A (en) * | 2014-07-31 | 2016-02-15 | 정우이앤이 주식회사 | Fuel gas double pipe for ship |
| CN105546232A (en) * | 2016-02-01 | 2016-05-04 | 中航鼎衡造船有限公司 | Double-wall pipe for dual-fuel propelling ship |
| CN108266289A (en) * | 2017-01-04 | 2018-07-10 | 江南造船(集团)有限责任公司 | High-pressure gas double-wall pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114811270A (en) * | 2020-07-10 | 2022-07-29 | 中国兵器工业第五九研究所 | High-efficiency heat-preservation and heat-insulation material and preparation method thereof |
| CN114811270B (en) * | 2020-07-10 | 2023-04-18 | 中国兵器工业第五九研究所 | High-efficiency heat-preservation and heat-insulation material and preparation method thereof |
| CN114412370A (en) * | 2021-12-23 | 2022-04-29 | 中国原子能科学研究院 | Pipe group structure for deep well |
| CN114412370B (en) * | 2021-12-23 | 2023-08-18 | 中国原子能科学研究院 | Tube group structure for deep well |
| CN117020590A (en) * | 2023-10-08 | 2023-11-10 | 核工业西南物理研究院 | Manufacturing method of special pipe with interlayer |
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