CN116164223A - LNG tank manufacturing method and LNG tank - Google Patents

LNG tank manufacturing method and LNG tank Download PDF

Info

Publication number
CN116164223A
CN116164223A CN202310046907.0A CN202310046907A CN116164223A CN 116164223 A CN116164223 A CN 116164223A CN 202310046907 A CN202310046907 A CN 202310046907A CN 116164223 A CN116164223 A CN 116164223A
Authority
CN
China
Prior art keywords
positioning
platform
tank body
supporting seat
positioning tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310046907.0A
Other languages
Chinese (zh)
Inventor
陈�胜
陈琛权
涂伟
苏腾太
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shipyard International Co Ltd
Original Assignee
Guangzhou Shipyard International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shipyard International Co Ltd filed Critical Guangzhou Shipyard International Co Ltd
Priority to CN202310046907.0A priority Critical patent/CN116164223A/en
Publication of CN116164223A publication Critical patent/CN116164223A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • 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
    • B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
    • B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The invention discloses a manufacturing method of an LNG tank and the LNG tank, wherein the manufacturing method comprises the following steps: step S1, providing a positioning tool, which comprises a positioning plate, wherein positioning holes are formed in the positioning plate, a tank body, a supporting seat and a platform of an LNG tank are manufactured respectively, when the supporting seat is manufactured, the supporting seat and the positioning tool are assembled together, a first mounting hole is drilled on the supporting seat according to the positioning holes, when the platform is manufactured, the platform and the positioning tool are assembled together, and a second mounting hole is drilled on the platform according to the positioning holes; s2, installing the supporting seat on the positioning plate through a fastener, hoisting and positioning the tool to assemble with the tank body, and welding and fixing the supporting seat and the tank body; s3, dismantling a positioning tool on the tank body; and S4, assembling the hoisting platform and the tank body, and connecting the first mounting hole and the second mounting hole through a fastener. The method can avoid long-time high-altitude hoisting operation, reduce the difficulty of opening the platform and has high operation efficiency.

Description

LNG tank manufacturing method and LNG tank
Technical Field
The invention relates to the technical field of pressure vessel manufacturing, in particular to a manufacturing method of an LNG tank and the LNG tank.
Background
LNG (liquefied natural gas ) tanks are a type of pressure vessel equipment commonly used in marine facilities for storing and transporting liquefied natural gas. One existing capacity is 1750m 3 The LNG tank mainly comprises a tank body, a supporting seat and a platform. The tank body is a pressure container and is used for containing liquefied natural gas. The supporting seat is welded and installed on the tank body, the supporting seat is used for installing the platform, and the platform is connected with the supporting seat through bolts. In the manufacturing process of the LNG tank, the supporting seat is arranged on the tank body in advance, and then the manufactured platform is hoisted to be arranged with the supporting seat on the tank body. In order to ensure the position accuracy between the platform and the supporting seat and ensure the smooth connection of the bolts, a mode of matching the platform with the supporting seat to form holes is generally adopted, namely, the lifting platform is assembled with the supporting seat, and then the corresponding position on the platform is matched with the supporting seat to form holes. The manufacturing method can ensure that the holes of the platform and the supporting seat are aligned, and ensure the smooth connection of the bolts. However, this mode needs to occupy the loop wheel machine for a long time, and the operating personnel need long-time overhead operation to carry out the trompil, and the trompil degree of difficulty is great, and the operating efficiency is lower.
Disclosure of Invention
One object of an embodiment of the invention is to: the manufacturing method of the LNG tank can avoid long-time high-altitude hoisting operation, reduce the difficulty of opening the platform and have high operation efficiency.
Another object of an embodiment of the invention is to: the LNG tank can ensure smooth installation of the platform and the tank body and is convenient to manufacture.
In order to achieve the above purpose, the invention adopts the following technical scheme:
provided is a method for manufacturing an LNG tank, comprising the steps of:
step S1, providing a positioning tool, wherein the positioning tool comprises a positioning plate, positioning holes for penetrating fasteners are formed in the positioning plate, a tank body, a supporting seat and a platform of an LNG tank are manufactured respectively, when the supporting seat is manufactured, the supporting seat is assembled with the positioning tool, a first mounting hole is drilled on the supporting seat according to the positioning holes, when the platform is manufactured, the platform is assembled with the positioning tool, and a second mounting hole is drilled on the platform according to the positioning holes;
s2, installing the supporting seat on the positioning plate through the fastener, hoisting the positioning tool to assemble with the tank body, and welding and fixing the supporting seat and the tank body;
s3, removing the positioning tool on the tank body;
and S4, hoisting the platform and the tank body for assembly, and connecting the first mounting hole and the second mounting hole through the fastener.
Further, the manufacturing steps of the platform are as follows:
s11, assembling the platform and assembling the positioning tool on the platform;
step S12, welding the platform;
and S13, drilling the second mounting hole on the platform.
Further, the manufacturing steps of the platform further include: and S14, pre-installing the fastener, and penetrating the fastener into the positioning plate and the second mounting hole.
Furthermore, a first datum line is arranged on the positioning tool, and the platform is assembled by taking the first datum line as a positioning datum.
Further, a second datum line is drawn on the tank body, when the positioning tool and the tank body are assembled, the positioning tool and the tank body are aligned through the first datum line and the second datum line so as to realize axial positioning between the positioning tool and the tank body, and an included angle between a positioning plate of the positioning tool and the horizontal direction is adjusted so as to realize radial positioning between the positioning tool and the tank body.
Further, when the positioning tool and the tank body are assembled, the position of the tank body is adjusted, and the first datum line and the second datum line are aligned in the vertical direction.
Further, in step S3, after the positioning tool is removed, surface treatment is performed on the LNG tank.
Further, the positioning tool comprises a plurality of positioning plates, and the positioning plates and the supporting seats are in one-to-one correspondence.
Further, the fastener is a bolt.
Also provided is an LNG tank manufactured by the method for manufacturing the LNG tank.
The beneficial effects of the invention are as follows: the positioning tool is respectively matched with the supporting seat and the platform to manufacture, the first mounting hole is formed on the supporting seat in a drilling mode with the positioning hole of the positioning tool, the second mounting hole is formed on the platform in a drilling mode with the positioning hole of the positioning tool, and the positioning tool and the tank body are assembled together to weld and fix the supporting seat. The supporting seat on the tank body can be matched with the platform in the mode, so that the platform can be quickly hoisted to the tank body to be smoothly assembled with the supporting seat. When guaranteeing to install the fastener smoothly, because the platform can weld in the ground, the hoist and mount time when being favorable to reducing the platform installation reduces the aerial work, and then has reduced the trompil degree of difficulty of platform, improves the operating efficiency.
Drawings
The invention is described in further detail below with reference to the drawings and examples.
Fig. 1 is a schematic diagram of an LNG tank according to an embodiment of the present invention.
Fig. 2 is a top view of a can according to an embodiment of the present invention.
Fig. 3 is a schematic view of a platform according to an embodiment of the invention.
Fig. 4 is a schematic diagram of a positioning tool according to an embodiment of the present invention.
In the figure:
1. a tank body; 11. a mounting position; 12. a second reference line; 2. a support base; 3. a platform; 31. a bottom plate; 32. a second mounting hole; 33. a fence; 34. avoidance holes; 4. positioning a tool; 41. a first reference line; 42. a frame; 43. a positioning plate; 44. positioning holes; 5. and a pipe fitting.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1 to 4, the present invention provides a method for manufacturing an LNG tank, which is used for manufacturing an LNG tank. In this example, the capacity of the LNG tank was 1750m 3 It comprises a tank body 1, a supporting seat 2 and a platform 3. The tank body 1 is a steel shell pressure container and is of a hollow cylinder structure, and the tank body 1 is used for containing liquefied natural gas. The supporting seat 2 is a plurality of, and a plurality of supporting seats 2 interval set up in the top surface of jar body 1, and supporting seat 2 and jar body 1 welded fastening, supporting seat 2 are used for mounting platform 3. The platform 3 is disposed in a horizontal direction, and the platform 3 includes a bottom plate 31 and a rail 33 disposed at an edge position of the bottom plate 31. The platform 3 is used for installing control valves, pipelines and the like of the LNG tank so that operators can carry out inspection, valve control and the like on the LNG tank through the platform 3. The second mounting holes 32 are formed in the bottom plate 31 of the platform 3, correspondingly, the first mounting holes are formed in the supporting seat, and the first mounting holes and the second mounting holes 32 are used for penetrating fasteners, so that the platform 3 and the supporting seat 2 are fixedly mounted through the fasteners. In this embodiment, the fastener is a bolt.
The method for manufacturing the LNG tank comprises the following steps:
step S1, providing a positioning tool 4, where the positioning tool 4 includes a frame 42 and a plurality of positioning plates 43 disposed on the frame 42. The positioning plates 43 are in one-to-one correspondence with the supporting seats 2. In this embodiment, the number of the positioning plates 43 and the supporting seats 2 is eight, and the eight positioning plates 43 are divided into two rows along the width direction (Y direction in the drawing) of the frame 42, and four positioning plates 43 are distributed in each row. Four locating plates 43 in each row are spaced apart along the length of the frame 42 (X direction shown). The positioning plate 43 is provided with a positioning hole 44 for passing through the fastener.
And respectively manufacturing a tank body 1, a supporting seat 2 and a platform 3 of the LNG tank. The tank body 1 is made of metal plates, the metal plates are rolled and welded to form a plurality of cylinder sections, the cylinder sections are spliced into a cylinder body along the length direction of the tank body 1, and then sealing heads are welded at two ends of the cylinder body to form the tank body 1 with a sealing structure. Finally, a pipe fitting 5 is installed on the tank body 1, and the pipe fitting 5 comprises a pipe joint for connecting the inner part and the outer part of the tank body 1, a manhole assembly for overhauling and connecting pipes with other functions.
The supporting seat 2 is formed by welding steel plates, the supporting seat 2 plays a role of supporting the platform 3, a mounting surface used for being abutted to the platform 3 is arranged on the supporting seat 2, and a first mounting hole used for penetrating a fastener is formed in the mounting surface. When the support seat 2 is manufactured, the support seat 2 and the positioning tool 4 are assembled together, and the first mounting hole is drilled on the support seat 2 according to the positioning hole 44 on the positioning plate 43. Because the first mounting hole and the positioning hole 44 on the positioning tool 4 are matched with each other, the position and the size of the first mounting hole are matched with the positioning hole 44 on the positioning tool 4, so that the fastener can be smoothly penetrated in the first mounting hole and the positioning hole 44.
Platform 3 includes floor 31 and rail 33. The bottom plate 31 is formed by welding profile steel and steel plates, the whole bottom plate 31 is flat plate-shaped, and the fence 33 is formed by welding profile steel. The manufacturing steps of the platform 3 comprise:
step S11, assembling the bottom plate 31 and the rail 33 of the platform 3, and assembling the positioning tool 4 on one side surface of the bottom plate 31, which is away from the rail 33. The positioning tool 4 can be assembled with the bottom plate 31 by means of fixture fixing or spot welding.
Step S12, welding the parts of the bottom plate 31 and the rail 33 to form the platform 3. Because the positioning tool 4 is assembled with the platform 3, the positioning tool 4 plays a role in fixing the platform 3, and welding deformation of the platform 3 in the welding process is avoided.
And S13, drilling a second mounting hole 32 on the bottom plate 31 of the platform 3 according to the positioning hole 44 of the positioning tool 4. Because the second mounting hole 32 and the positioning hole 44 on the positioning tool 4 are matched with each other, the position and the size of the second mounting hole 32 are matched with the positioning hole 44 on the positioning tool 4, so that the fastener can be smoothly penetrated in the second mounting hole 32 and the positioning hole 44.
Step S14, pre-installing a fastener, and penetrating the fastener into the positioning hole 44 and the second mounting hole 32, namely connecting the positioning plate 43 of the positioning tool 4 with the bottom plate 31 through the fastener. This mode can verify the machining quality of the second mounting hole 32 on the platform 3, and when the fastener is unable to connect, the second mounting hole 32 can be reworked. Through the preinstallation to the fastener to guarantee to carry out bolted connection smoothly between platform 3 and the location frock 4.
It will be appreciated that in the process of manufacturing the support base 2 and the platform 3, the support base 2 and the positioning fixture 4 are assembled together to form a first mounting hole, and the platform 3 and the positioning fixture 4 are assembled together to form a second mounting hole 32, so that the first mounting hole, the second mounting hole 32 and the positioning hole 44 are mutually matched to ensure that the first mounting hole and the positioning hole 44 can be smoothly connected by a fastener, and the second mounting hole 32 and the positioning hole 44 can be smoothly connected by a fastener.
Step S2, installing the supporting seat 2 on a positioning plate 43 of a positioning tool 4 through a fastener, lifting the positioning tool 4 to assemble with the tank body 1, and fixing the supporting seat 2 and the tank body 1 in a welding manner. It can be understood that the supporting seat 2 is assembled with the positioning tool 4, and the supporting seat 2 on the welded tank body 1 is matched with the positioning tool 4. Meanwhile, as the positioning tool 4 and the platform 3 are matched with each other, the platform 3 and the supporting seat 2 on the tank body 1 are matched with each other, so that when the platform 3 is mounted on the tank body 1, the second mounting hole 32 of the platform 3 can be matched with the first mounting hole on the supporting seat 2, and the platform 3 and the supporting seat 2 can be smoothly connected through a fastener.
And S3, dismantling the positioning tool 4 on the tank body 1. The positioning tool 4 plays a role in positioning the supporting seat 2 in the installation process of the supporting seat 2, so that the relative position between the supporting seat 2 and the tank body 1 is matched with the relative position of the second mounting hole 32 on the platform 3. Therefore, after the support seat 2 is installed, the positioning tool 4 is removed.
And after the positioning tool 4 is removed, performing surface treatment on the LNG tank. It will be appreciated that the outer surface of the can 1 may be subjected to insulation, corrosion protection or heat preservation. After the welding of the supporting seat 2 is completed, the surface treatment of the LNG tank is carried out, so that the surface treatment of the welding seam of the supporting seat 2 can be ensured, and the surface treatment quality of the LNG tank can be ensured.
And S4, assembling the hoisting platform 3 and the tank body 1, and connecting the first mounting holes with the second mounting holes 32 through fasteners. Because the supporting seat 2 and the platform 3 are matched and perforated by taking the positioning hole 44 on the positioning tool 4 as a reference, when the platform 3 is installed on the tank body 1, the first installation hole on the supporting seat 2 can be opposite to the second installation hole 32 on the platform 3, so that the fastener can be smoothly installed.
Optionally, referring to fig. 4, a first reference line 41 is provided on the positioning tool 4. When the platform 3 is manufactured, all parts on the platform 3 are assembled by taking the first datum line 41 as a positioning datum, so that the platform 3 is matched with the positioning tool 4.
When the platform 3 is manufactured, after the platform 3 is welded, the avoidance holes 34 are formed in the bottom plate 31 by taking the first datum line 41 on the positioning tool 4 as a positioning datum. The avoiding hole 34 is used for avoiding the pipe fitting 5 on the tank body 1, so that when the platform 3 is installed on the tank body 1, the pipe fitting 5 can smoothly pass through the avoiding hole 34.
Optionally, a second reference line 12 is drawn on the can 1, the second reference line 12 being located on the outer surface of the can 1. When the positioning tool 4 is assembled with the tank body 1, the positioning tool 4 and the tank body 1 are axially positioned by aligning the first datum line 41 with the second datum line 12. The radial positioning between the positioning tool 4 and the tank body 1 is realized by adjusting the included angle between the positioning plate 43 of the positioning tool 4 and the horizontal direction. It can be understood that the first datum line 41 and the second datum line 12 are respectively arranged on the positioning tool 4 and the tank body 1, so that positioning is performed when the supporting seat 2 is installed, and the installation position of the supporting seat 2 meets the design requirement. Specifically, the two first reference lines 41 are two, the two first reference lines 41 are perpendicular to each other, and the two first reference lines 41 extend along the length direction and the width direction of the positioning tool 4 respectively. Similarly, two second reference lines 12 are provided, and the two second reference lines 12 extend along the axial direction and the radial direction of the can body 1 respectively.
In order to facilitate the assembly between the positioning tool 4 and the tank 1, during the assembly operation, the position of the tank 1 is adjusted so that the first reference line 41 and the second reference line 12 are aligned in the vertical direction. It will be appreciated that the position of the can 1 is adjusted such that the second datum line 12 extending in the axial direction of the can 1 is located at the top of the can 1. Then, the positioning tool 4 is hoisted to the top of the tank body 1, and tools such as laser positioning equipment, plumb line and the like can be used for rapidly positioning the positioning tool 4 so as to realize the alignment of the first datum line 41 and the second datum line 12 in the vertical direction. In this state, the positioning plate 43 on the positioning tool 4 is in a horizontal state so as to rapidly determine the horizontal position of the positioning tool 4 through the level gauge, thereby completing the positioning of the positioning tool 4. The positioning tool 4 is assembled at the top of the tank body 1, and compared with the assembly in other directions of the tank body 1, the positioning tool has the characteristics of convenient hoisting and measurement, and is beneficial to reducing the hoisting time of the positioning tool 4.
Optionally, a plurality of mounting positions 11 are further formed on the tank body 1 in a scribing mode, and the plurality of mounting positions 11 are in one-to-one correspondence with the plurality of supporting seats 2 so as to be assembled quickly when the supporting seats 2 are mounted.
The beneficial effects of this embodiment are: the positioning tool 4 is respectively matched with the supporting seat 2 and the platform 3 for manufacturing, a first mounting hole is formed on the supporting seat 2 in a mode of matching a drill with the positioning hole 44 of the positioning tool 4, a second mounting hole 32 is formed on the platform 3 in a mode of matching a drill with the positioning hole 44 of the positioning tool 4, and the positioning tool 4 and the tank body 1 are assembled together for welding and fixing the supporting seat 2. This mode makes the supporting seat 2 on the jar body 1 can cooperate with the platform 3 to the platform 3 can hoist and mount fast to jar body 1 on with the supporting seat 2 assembly smoothly. When guaranteeing to install the fastener smoothly, because platform 3 can weld, trompil in the ground, be favorable to reducing the hoist and mount time when platform 3 installs, reduce the aerial work, and then reduced the trompil degree of difficulty of platform 3, improve the operating efficiency.
Referring to fig. 1 to 3, there is also provided an LNG tank manufactured by the above-described LNG tank manufacturing method, which includes a tank body 1, a support base 2, and a platform 3. The positioning tool 4 is respectively matched with the supporting seat 2 and the platform 3 for manufacturing, a first mounting hole is formed on the supporting seat 2 in a mode of matching a drill with the positioning hole 44 of the positioning tool 4, a second mounting hole 32 is formed on the platform 3 in a mode of matching a drill with the positioning hole 44 of the positioning tool 4, and the positioning tool 4 and the tank body 1 are assembled together for welding and fixing the supporting seat 2. The smooth installation of the platform 3 and the tank body 1 can be ensured, and the manufacturing is convenient.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims (10)

1. A method for manufacturing an LNG tank, comprising the steps of:
step S1, providing a positioning tool, wherein the positioning tool comprises a positioning plate, positioning holes for penetrating fasteners are formed in the positioning plate, a tank body, a supporting seat and a platform of an LNG tank are manufactured respectively, when the supporting seat is manufactured, the supporting seat is assembled with the positioning tool, a first mounting hole is drilled on the supporting seat according to the positioning holes, when the platform is manufactured, the platform is assembled with the positioning tool, and a second mounting hole is drilled on the platform according to the positioning holes;
s2, installing the supporting seat on the positioning plate through the fastener, hoisting the positioning tool to assemble with the tank body, and welding and fixing the supporting seat and the tank body;
s3, removing the positioning tool on the tank body;
and S4, hoisting the platform and the tank body for assembly, and connecting the first mounting hole and the second mounting hole through the fastener.
2. The method of manufacturing LNG tanks according to claim 1, characterized in that the steps of manufacturing the platform are as follows:
s11, assembling the platform and assembling the positioning tool on the platform;
step S12, welding the platform;
and S13, drilling the second mounting hole on the platform.
3. The method of manufacturing an LNG tank according to claim 2, wherein the step of manufacturing the platform further comprises: and S14, pre-installing the fastener, and penetrating the fastener into the positioning plate and the second mounting hole.
4. The method of manufacturing an LNG tank according to claim 2, wherein the positioning tool is provided with a first reference line, and the stage is assembled with the first reference line as a positioning reference.
5. The LNG tank manufacturing method according to claim 4, wherein a second reference line is drawn on the tank body, the positioning tool and the tank body are aligned by the first reference line and the second reference line when assembled, so as to realize axial positioning between the positioning tool and the tank body, and an included angle between a positioning plate of the positioning tool and a horizontal direction is adjusted so as to realize radial positioning between the positioning tool and the tank body.
6. The LNG tank manufacturing method according to claim 5, wherein the positioning fixture is assembled with the tank body, the tank body is adjusted in position, and the first reference line and the second reference line are aligned in a vertical direction.
7. The method according to claim 1, wherein in step S3, the LNG tank is surface-treated after the positioning fixture is removed.
8. The LNG tank manufacturing method according to claim 1, wherein the positioning fixture includes a plurality of positioning plates, the plurality of positioning plates being in one-to-one correspondence with the plurality of support seats.
9. The method of manufacturing an LNG tank according to claim 1, wherein the fastener is a bolt.
10. LNG tank, characterized by being manufactured by the method of manufacturing an LNG tank according to any of claims 1-9.
CN202310046907.0A 2023-01-31 2023-01-31 LNG tank manufacturing method and LNG tank Pending CN116164223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310046907.0A CN116164223A (en) 2023-01-31 2023-01-31 LNG tank manufacturing method and LNG tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310046907.0A CN116164223A (en) 2023-01-31 2023-01-31 LNG tank manufacturing method and LNG tank

Publications (1)

Publication Number Publication Date
CN116164223A true CN116164223A (en) 2023-05-26

Family

ID=86412703

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310046907.0A Pending CN116164223A (en) 2023-01-31 2023-01-31 LNG tank manufacturing method and LNG tank

Country Status (1)

Country Link
CN (1) CN116164223A (en)

Similar Documents

Publication Publication Date Title
KR102498341B1 (en) Frame structure for supporting facility piping
CN110877679B (en) Pre-installation process of grating plates on segments
WO2009110541A1 (en) Method of partially renovating shell plates of towers and vessels
CN110539097B (en) Installation method and installation tool for self-elevating platform submersible pump tower pipe
CN113029500A (en) Assembly process of main box body of large-scale test section of hypersonic wind tunnel
JP4837135B1 (en) Partial renewal construction method for trunk plates of tower tanks
CN113814676B (en) Manufacturing method of large-diameter tower equipment
CN111112933A (en) Auxiliary connecting tool for butt joint of large-diameter steel pipes
CN116164223A (en) LNG tank manufacturing method and LNG tank
CN217991630U (en) Revolving frame unit, revolving frame and processing tool of revolving frame unit
CN116290809A (en) Modularized construction method for super high-rise pipe well vertical pipe
CN113932068B (en) Method for assembling overhead vibration isolation hanging bracket of spring in annular pipe gallery
CN112441195A (en) Leveling installation method of ship universal fastening device
CN213410988U (en) Pipeline or container group in modularization production is to welding position device
CN217702157U (en) Anti-deformation clamp for circular flange of fan
CN220666488U (en) Connecting component for steel structure
CN219901984U (en) Tool for positioning and installing top beam sleeve of hydraulic support
CN114132830B (en) Pile leg section deflection lifting construction method
CN220201224U (en) Tower body adjusting joint of tower crane
CN113944875B (en) LNG ship gas dome relief valve pipe annex assembly location frock
CN115070649B (en) Simulation tool for marine main engine lubricating oil pump and installation method thereof
CN220300875U (en) Modular electrolyzer housing
CN113161953B (en) Method for installing cable protection pipe at top section of offshore boosting transformer substation
CN118527990A (en) In-factory trial-assembly auxiliary tool and method for portal rotary carrier beam of bucket wheel excavator
CN111108051B (en) Lining body repairing method for factory equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination