CN112372228A - Assembly tool and process for butt weld of emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) - Google Patents
Assembly tool and process for butt weld of emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) Download PDFInfo
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- CN112372228A CN112372228A CN202011164185.1A CN202011164185A CN112372228A CN 112372228 A CN112372228 A CN 112372228A CN 202011164185 A CN202011164185 A CN 202011164185A CN 112372228 A CN112372228 A CN 112372228A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003949 liquefied natural gas Substances 0.000 title claims description 31
- 239000010935 stainless steel Substances 0.000 claims description 26
- 229910001220 stainless steel Inorganic materials 0.000 claims description 26
- 238000003466 welding Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 18
- 230000000712 assembly Effects 0.000 claims description 6
- 238000000429 assembly Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000012797 qualification Methods 0.000 abstract description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
- B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
- B23K37/0533—External pipe alignment clamps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an assembly tool and a process for a butt weld of emergency pump pipes with different pipe wall inner diameters of LNG, wherein the assembly tool comprises the following components: the first supporting frame and the second supporting frame are respectively embraced on the outer surfaces of the splicing parts of the first pump pipe and the second pump pipe, and the inner diameter of the second pump pipe is larger than that of the first pump pipe; the positioning tools are arranged on the outer surfaces of the first support frame and the second support frame in a surrounding manner, and the positioning tools fix the relative positions of the first support frame and the second support frame; and the output end of the driving device is contacted with the second pump pipe, and the output end of the driving device extrudes the splicing part of the second pump pipe until the inner diameter of the splicing part of the second pump pipe is the same as that of the splicing part of the first pump pipe. The advantages are that: the assembling tool combines the first support frame, the second support frame, the two positioning tools and the driving device, realizes the assembly of butt weld joints of emergency pump pipes with different pipe wall inner diameters, can effectively reduce the assembling time, and improves the flaw detection qualification rate of the weld joints.
Description
Technical Field
The invention relates to the field of welding assembly, in particular to an assembling tool and an assembling process for a butt weld of emergency pump pipes with different pipe wall inner diameters of LNG.
Background
The assembly of the butt weld of the emergency pump pipes in the liquid cargo tank of the film type Liquefied Natural Gas (hereinafter referred to as LNG) ship is particularly important in the whole process, especially the assembly of the butt weld of the emergency pump pipes with different pipe wall inner diameters.
In some devices, an emergency pump pipe in a triangular mast structure of a pump tower is a main pipe, which is formed by splicing a plurality of stainless steel pump pipes with the outer diameters of phi 610mm (the wall thickness is 12.5) and phi 627 (the wall thickness is 21), and the stainless steel pump pipes are welded into a straight pipe section with the total length of about 30m after being welded and formed. And then the pipe is connected with pipe accessories and other parts, and the manufactured and formed pipe accessories are important pipe accessories integrating structural parts and functional parts.
Generally, the straightness of the main pipe is required to be +/-8 mm, the error between the ovality and the outer diameter of a raw material straight pipe is large, a welding gap needs to be controlled to be 3-5 mm, and pipe wall dislocation (the requirement for inner wall dislocation is less than or equal to 2mm) is formed when two straight pipes are butted, so that the problem of increasing assembly difficulty is caused. X-ray flaw detection is required after the butt weld of each spliced pipe is welded, the flaw detection of each spliced pipe is qualified by reaching European standard II-100%, and the assembly and the positioning of the weld of the stainless steel pipe are important factors for ensuring the qualified flaw detection of the weld.
Disclosure of Invention
The assembling tool combines structures such as a first support frame, a second support frame, at least two positioning tools, a driving device and the like, so that the assembly of the butt weld of the emergency pump pipes with different pipe wall inner diameters is realized; by adopting the tool for assembling, the assembling time can be effectively reduced, the flaw detection qualification rate of the welding seam is improved, the working efficiency is improved, the welding deformation is controlled to the maximum extent, and the product quality is ensured.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides an emergent pump line butt weld assembly fixture of different pipe wall internal diameters of LNG, contains:
the first support frame is encircled on the outer surface of the splicing part of the first pump pipe;
the second support frame is encircled on the outer surface of the splicing part of the second pump pipe, and the inner diameter of the second pump pipe is larger than that of the first pump pipe;
the positioning tools are arranged on the outer surfaces of the first support frame and the second support frame in a surrounding mode, and the positioning tools fix the relative positions of the first support frame and the second support frame;
the driving device output end is in contact with the second pump pipe, and the driving device output end extrudes the second pump pipe splicing part until the inner diameter of the second pump pipe splicing part is the same as that of the first pump pipe splicing part.
Optionally, the positioning tool includes:
the first support piece is connected with the first support frame;
the second supporting piece is connected with the second supporting frame;
one end of the adjusting screw is connected with the first supporting piece, the other end of the adjusting screw is connected with the second supporting piece, and the adjusting screw is detachably connected with the first supporting piece and/or the second supporting piece.
Optionally, one end of the driving device is connected with the positioning tool through a third supporting piece, the output end of the driving device is connected with a gasket, and the driving device is in contact with the second pump pipe through the gasket.
Optionally, two ends of the third supporting member are respectively connected to the first supporting member and the second supporting member.
Optionally, the first supporting member is provided with a plurality of first through holes, the second supporting member is provided with a plurality of second through holes, the third supporting member is provided with a plurality of third through holes, and the third supporting member is respectively connected with the first supporting member and the second supporting member through bolt assemblies;
or, be provided with a plurality of second through-hole on the second support piece, third support piece is provided with a plurality of third through-hole, support piece with first support piece welded connection, third support piece with second support piece passes through bolt assembly and connects.
Optionally, the first support member and/or the second support member and/or the third support member are/is an L-shaped angle steel structure;
and/or the first support part is connected with the first support frame in a welding way;
and/or the second support piece is connected with the second support frame in a welding way;
and/or the first pump pipe and the second pump pipe are made of stainless steel materials, and the first support piece and/or the second support piece and/or the third support piece and/or the gasket are made of stainless steel materials.
Optionally, the first support frame is a first hoop, the second support frame is a second hoop, and the first hoop and/or the second hoop include at least two arc-shaped brackets connected to each other.
Optionally, the first hoop and/or the second hoop comprises two arc-shaped brackets, each arc-shaped bracket is a semicircular bracket, two ends of each arc-shaped bracket are provided with connecting lugs, and the two arc-shaped brackets are connected at the connecting lugs through bolt assemblies;
and/or the first hoop and/or the second hoop are made of stainless steel materials;
and/or the first hoop and/or the second hoop are manufactured by water-jet cutting equipment;
and/or the outer surface of the first hoop and/or the second hoop is marked with respective inner diameter size.
Optionally, the driving device is a hydraulic jack;
and/or each positioning tool is arranged in a central symmetry manner, and the number of the positioning tools is less than or equal to six.
Optionally, an assembly process for the assembly tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of the LNG includes:
respectively embracing a first support frame and a second support frame on the outer surface of the splicing part of a first pump pipe and a second pump pipe, and fixing the relative positions of the first pump pipe and the second pump pipe by adopting a positioning tool;
installing a driving device to be connected with the positioning tool;
and starting the driving device, so that the output end of the driving device extrudes the splicing part of the second pump pipe until the inner diameter of the splicing part of the second pump pipe is the same as that of the splicing part of the first pump pipe.
Compared with the prior art, the invention has the following advantages:
according to the assembling tool and the process for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG, disclosed by the invention, the assembling tool combines the structures of the first support frame, the second support frame, the at least two positioning tools, the driving device and the like, so that the butt weld assembly of the emergency pump pipe with different pipe wall inner diameters is realized, the first support frame, the second support frame and the positioning tools of the assembling tool can conveniently and accurately position the gap of the weld, and the gap can be ensured to meet the requirements of the welding process.
Furthermore, the positioning tool and the driving device of the assembly tool can adjust the dislocation of the inner wall of the pump pipe in the welding process, and the qualified rate of welding flaw detection is improved.
Furthermore, the assembly tool can prevent the stainless steel pump pipe from welding deformation in the welding process, and the straightness of the spliced pipeline after welding forming is guaranteed.
Drawings
FIG. 1 is a schematic perspective structure diagram of an assembling tool for butt weld joints of emergency pump pipes with different pipe wall inner diameters of LNG;
FIG. 2 is a top view of an assembling tool for butt weld joints of emergency pump pipes with different pipe wall inner diameters of LNG;
FIG. 3 is a side view of an assembling tool for butt weld joints of emergency pump pipes with different pipe wall inner diameters of LNG;
fig. 4 shows two emergency pump pipes assembled by butt welding according to the invention.
Detailed Description
The present invention will now be further described by way of the following detailed description of a preferred embodiment thereof, taken in conjunction with the accompanying drawings.
As shown in fig. 1 to 3, the assembly tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG of the present invention includes: the device comprises a first support frame, a second support frame, at least two positioning tools 3 and a plurality of driving devices.
The first supporting frame embraces the outer surface of the splicing position of the first pump pipe 5, the second supporting frame embraces the outer surface of the splicing position of the second pump pipe 6, and the inner diameter of the second pump pipe 6 is larger than that of the first pump pipe 5. Each positioning tool 3 is arranged on the outer surfaces of the first support frame and the second support frame in a surrounding mode, and the relative positions of the first support frame and the second support frame are fixed through the positioning tools 3. The driving device is respectively connected with the positioning tool 3, the output end of the driving device is in contact with the second pump pipe 6, and the output end of the driving device extrudes the splicing part of the second pump pipe 6 until the inner diameter of the splicing part of the second pump pipe 6 is the same as that of the splicing part of the first pump pipe 5. The first support frame, the second support frame and the positioning tool 3 are combined to conveniently and accurately position a gap between welding seams of the two pump pipes (see figure 4), and the gap can meet the requirements of a welding process.
In the embodiment, the driving device is a portable hydraulic jack 4, the working pressure of the hydraulic jack 4 is more than or equal to 10T, and the hydraulic jack 4 is convenient to disassemble and adjust. In addition, in this embodiment, first support frame is first staple bolt 1, the second support frame is second staple bolt 2, first staple bolt 1 and second staple bolt 2 all contain two interconnect's arc support, the arc support is semi-circular support, arc support both ends are provided with the engaging lug, and two the arc support is in the engaging lug department passes through bolt assembly and connects to form complete first staple bolt 1 or second staple bolt 2.
Further, the positioning tool 3 includes: a first support 31, a second support 32 and an adjusting screw 33.
The first supporting piece 31 is connected with the first hoop 1, and the second supporting piece 32 is connected with the second hoop 2. One end of the adjusting screw 33 is connected to the first supporting member 31, and the other end is connected to the second supporting member 32.
Optionally, the adjusting screw 33 is detachably connected to the first support 31 and/or the second support 32. In this embodiment, one end of the adjusting screw 33 is welded to the second supporting member 32, and the other end thereof is provided with a thread structure and passes through the opening of the first supporting member 31, and the position thereof is fixed by a nut assembly or the like, and the distance between the first supporting member 31 and the second supporting member 32 can be adjusted by adjusting the rotation position of the nut assembly. Of course, the connection mode of the adjusting screw 33 is not limited to the above type, and in another embodiment, both ends of the adjusting screw 33 are respectively connected with the first supporting member 31 and the second supporting member 32 by using nut assemblies, and the connection mode is convenient for the detachment and installation of each component.
In this embodiment, the hydraulic jack 4 is connected to the positioning tool 3 through a third support member 41, an output end of the hydraulic jack 4 is connected to a gasket 42, and the hydraulic jack 4 contacts and presses the second pump pipe 6 through the gasket 42. Specifically, the hydraulic jack 4 applies pressure to the pipe wall of the second pump pipe 6 at the position where the offset position is formed, and transmits the pressure to the pipe wall of the second pump pipe 6 through the gasket 42, so that the pipe wall deforms in the inner diameter direction, and the pipe wall inner diameters of the two pump pipes are adjusted to the same inner diameter size. The gasket 42 increases the contact area between the hydraulic jack 4 and the second pump pipe 6, increases the stress area of the second pump pipe 6, does not generate abrasion, is convenient for more quickly and accurately extruding the second pump pipe 6, and prevents the local stress of the second pump pipe 6 from being too large and difficult to adjust.
Specifically, both ends of the third supporting member 41 are connected to the first supporting member 31 and the second supporting member 32, respectively. In the present embodiment, the first support member 31, the second support member 32, and the third support member 41 are all L-shaped angle steel structures (the size of the angle steel can be adjusted according to the wall thickness of the pipe wall by using L75 × 75 × 10 mm). The second supporting member 32 is provided with a plurality of second through holes, and the third supporting member 41 is provided with a plurality of third through holes. The third supporting member 41 is welded to the first supporting member 31, and the third supporting member 41 is connected to the second supporting member 32 by a bolt assembly. Specifically, the third through hole of the third support member 41 and the second through hole at a different position of the second support member 32 are connected by a bolt assembly so as to adjust different distances between the hydraulic jack 4 and the second pump pipe 6.
Of course, the connection relationship among the first support 31, the second support 32, and the third support 41 is not limited to the above. For example, in another embodiment, a plurality of first through holes are disposed on the first supporting member 31, a plurality of second through holes are disposed on the second supporting member 32, a plurality of third through holes are disposed on the third supporting member 41, and the third supporting member 41 is connected to the first supporting member 31 and the second supporting member 32 through bolt assemblies respectively. The connection relationship facilitates the adjustment of the position of the third supporting member 41, the disassembly and the placement of the tool, and the daily use of the worker.
In this embodiment, the first hoop 1 and the second hoop 2 are both made of stainless steel (specifically, stainless steel plates with a thickness of greater than or equal to 20mm may be used) to increase the strength of the tool. Generally, the pump pipes to be welded (such as the first pump pipe 5 and the second pump pipe 6) are made of stainless steel materials, and the first hoop 1 and the second hoop 2 are made of stainless steel materials without using carbon steel materials with equivalent rigidity, so that the stainless steel pump pipes are prevented from contacting with the carbon steel materials, the surface carburization of the stainless steel pump pipe product is prevented, and the galvanic corrosion of the stainless steel pump pipes is prevented (the corrosion resistance of the stainless steel is reduced along with the increase of the carbon content of the stainless steel materials).
Furthermore, the contact surfaces of other parts of the tool structure and the product are all made of stainless steel materials. For example, the gasket 42 is also made of a stainless steel material to prevent the pump tube made of the stainless steel material from being corroded, and of course, the material of the gasket 42 is not limited to the stainless steel material, and may be a thin plate made of a red copper material. In addition, the first and second supports 31 and 32 and the third support 41 are also made of a stainless steel material. The first support piece 31 is connected with the first hoop 1 in a welding mode; the second supporting member 32 is welded to the second hoop 2 to form a stable connection relationship.
In order to make the size precision of first staple bolt 1 and the preparation of second staple bolt 2 accord with the design requirement, its clearance with the first pump line 5 of stainless steel preparation and the 6 surfaces of second pump line as far as possible reduces, improves the laminating degree of staple bolt and pump line pipe wall, increases the moment conduction efficiency of frock when exerting pressure, first staple bolt 1 and second staple bolt 2 are makeed (can effectively prevent cutting deformation, and size precision is less than 0.5mm) through water sword cutting equipment.
In addition, the obvious positions of the outer surfaces of the first support frame and the second support frame, namely the first hoop 1 and the second hoop 2, are marked with respective inner diameter sizes so as to facilitate subsequent storage and use. In the follow-up work, the staff can discern required staple bolt size relatively fast according to the sign on each staple bolt.
In order to prevent stress deformation during welding, 8.8-grade high-strength galvanized bolts or nuts are used as the bolt assembly and the nut assembly used in the invention.
According to the actual ovality and the pipe wall dislocation of the stainless steel pipe, a plurality of positioning tools 3 can be additionally arranged on the hoop, and the angle can be adjusted according to different positions. In this embodiment, this frock even symmetry is provided with 6 location frocks 3 to guarantee that welding operation has sufficient smoothness nature and this frock has sufficient intensity to support, in addition, the even symmetry of location frocks 3 sets up the atress that also can guarantee the pump line pipe wall even. In practical application, in order to ensure the smoothness of welding operation, the total number of the positioning tools 3 is recommended to be not more than 6.
In addition, the invention also discloses an assembly welding process of the assembly tool for the butt weld of the emergency pump pipes with different pipe wall inner diameters of LNG, which comprises the following steps: s1, respectively embracing the first hoop 1 and the second hoop 2 on the outer surface of the splicing part of the first pump pipe 5 and the second pump pipe 6, and fixing the relative positions of the first pump pipe 5 and the second pump pipe 6 by adopting a positioning tool 3; s2, installing a hydraulic jack 4 to be connected with the positioning tool 3; and S3, starting the hydraulic jack 4 to enable the output end of the hydraulic jack 4 to extrude the splicing position of the second pump pipe 6 until the inner diameter of the splicing position of the second pump pipe 6 is the same as that of the splicing position of the first pump pipe 5.
In summary, in the assembly tool and the process for assembling the butt weld of the emergency pump pipes with different pipe wall inner diameters of the LNG, the assembly tool combines the structures of the first support frame, the second support frame, the at least two positioning tools 3, the driving device and the like, so that the assembly of the butt weld of the emergency pump pipes with different pipe walls is realized. The tool is simple in structure, low in manufacturing cost and simple in using method, and can be used for conveniently and effectively assembling butt welding seams, so that positioning errors caused by ovality of the pump pipe are reduced, welding deformation of the pump pipe is controlled, welding seam quality is improved, and flaw detection qualification rate is improved.
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.
Claims (10)
1. The utility model provides an emergent pump line butt weld assembly fixture of different pipe wall internal diameters of LNG, its characterized in that contains:
the first support frame is encircled on the outer surface of the splicing part of the first pump pipe;
the second support frame is encircled on the outer surface of the splicing part of the second pump pipe, and the inner diameter of the second pump pipe is larger than that of the first pump pipe;
the positioning tools are arranged on the outer surfaces of the first support frame and the second support frame in a surrounding mode, and the positioning tools fix the relative positions of the first support frame and the second support frame;
the driving device output end is in contact with the second pump pipe, and the driving device output end extrudes the second pump pipe splicing part until the inner diameter of the second pump pipe splicing part is the same as that of the first pump pipe splicing part.
2. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG (liquefied natural gas) according to claim 1, wherein the positioning tool comprises:
the first support piece is connected with the first support frame;
the second supporting piece is connected with the second supporting frame;
one end of the adjusting screw is connected with the first supporting piece, the other end of the adjusting screw is connected with the second supporting piece, and the adjusting screw is detachably connected with the first supporting piece and/or the second supporting piece.
3. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG (liquefied natural gas) according to claim 2,
one end of the driving device is connected with the positioning tool through a third supporting piece, the output end of the driving device is connected with a gasket, and the driving device is in contact with the second pump pipe through the gasket.
4. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG according to claim 3,
and two ends of the third supporting piece are respectively connected with the first supporting piece and the second supporting piece.
5. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG (liquefied natural gas) according to claim 3 or 4,
the first supporting piece is provided with a plurality of first through holes, the second supporting piece is provided with a plurality of second through holes, the third supporting piece is provided with a plurality of third through holes, and the third supporting piece is respectively connected with the first supporting piece and the second supporting piece through bolt assemblies;
or, be provided with a plurality of second through-hole on the second support piece, third support piece is provided with a plurality of third through-hole, support piece with first support piece welded connection, third support piece with second support piece passes through bolt assembly and connects.
6. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG according to claim 3,
the first supporting piece and/or the second supporting piece and/or the third supporting piece are of L-shaped angle steel structures;
and/or the first support part is connected with the first support frame in a welding way;
and/or the second support piece is connected with the second support frame in a welding way;
and/or the first pump pipe and the second pump pipe are made of stainless steel materials, and the first support piece and/or the second support piece and/or the third support piece and/or the gasket are made of stainless steel materials.
7. The assembling tool for the butt weld of the emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) according to claim 1,
the first support frame is a first hoop, the second support frame is a second hoop, and the first hoop and/or the second hoop comprise at least two arc-shaped supports which are connected with each other.
8. The assembling tool for the butt weld of the emergency pump pipe with different pipe wall inner diameters of LNG according to claim 7,
the first hoop and/or the second hoop comprise two arc-shaped supports, the arc-shaped supports are semicircular supports, connecting lugs are arranged at two ends of each arc-shaped support, and the two arc-shaped supports are connected at the connecting lugs through bolt assemblies;
and/or the first hoop and/or the second hoop are made of stainless steel materials;
and/or the first hoop and/or the second hoop are manufactured by water-jet cutting equipment;
and/or the outer surface of the first hoop and/or the second hoop is marked with respective inner diameter size.
9. The assembling tool for the butt weld of the emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) according to claim 1,
the driving device is a hydraulic jack;
and/or each positioning tool is arranged in a central symmetry manner, and the number of the positioning tools is less than or equal to six.
10. An assembling process of the LNG emergency pump pipe butt-welding seam assembling tool with different pipe wall inner diameters according to any one of claims 1 to 9, the assembling process comprising the following steps:
respectively embracing a first support frame and a second support frame on the outer surface of the splicing part of a first pump pipe and a second pump pipe, and fixing the relative positions of the first pump pipe and the second pump pipe by adopting a positioning tool;
installing a driving device to be connected with the positioning tool;
and starting the driving device, so that the output end of the driving device extrudes the splicing part of the second pump pipe until the inner diameter of the splicing part of the second pump pipe is the same as that of the splicing part of the first pump pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164185.1A CN112372228A (en) | 2020-10-27 | 2020-10-27 | Assembly tool and process for butt weld of emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164185.1A CN112372228A (en) | 2020-10-27 | 2020-10-27 | Assembly tool and process for butt weld of emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) |
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| CN112372228A true CN112372228A (en) | 2021-02-19 |
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| CN202011164185.1A Pending CN112372228A (en) | 2020-10-27 | 2020-10-27 | Assembly tool and process for butt weld of emergency pump pipes with different pipe wall inner diameters of LNG (liquefied natural gas) |
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| CN111037202A (en) * | 2019-12-14 | 2020-04-21 | 中冶天工集团有限公司 | Large-diameter pipeline aligning device and operation method |
| CN111112935A (en) * | 2020-01-03 | 2020-05-08 | 上海安宏建设工程有限公司 | Hydraulic external aligning device for steel gas pipeline |
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2020
- 2020-10-27 CN CN202011164185.1A patent/CN112372228A/en active Pending
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| US20070256288A1 (en) * | 1999-11-03 | 2007-11-08 | Vermaat Technics B.V.. | Method and device for welding pipes |
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| CN106041410A (en) * | 2016-06-20 | 2016-10-26 | 湖北三江航天红阳机电有限公司 | External opening aligning machine for pipelines |
| CN111037202A (en) * | 2019-12-14 | 2020-04-21 | 中冶天工集团有限公司 | Large-diameter pipeline aligning device and operation method |
| CN111112935A (en) * | 2020-01-03 | 2020-05-08 | 上海安宏建设工程有限公司 | Hydraulic external aligning device for steel gas pipeline |
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