CN118023650A - Method for preventing deformation of split gas compressor by assembling and welding two-stage aftercooler shell - Google Patents
Method for preventing deformation of split gas compressor by assembling and welding two-stage aftercooler shell Download PDFInfo
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- CN118023650A CN118023650A CN202410079743.6A CN202410079743A CN118023650A CN 118023650 A CN118023650 A CN 118023650A CN 202410079743 A CN202410079743 A CN 202410079743A CN 118023650 A CN118023650 A CN 118023650A
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- 238000003466 welding Methods 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000002265 prevention Effects 0.000 claims abstract description 7
- 238000000197 pyrolysis Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 150000004677 hydrates Chemical class 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
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
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Abstract
The invention discloses a split gas compressor two-section aftercooler shell assembly welding deformation prevention method, which belongs to the technical field of pressure vessel welding deformation prevention. Through having designed barrel and every draft tube lateral wall before welding, the firm annular whole circle support piece of spot welding in barrel inner wall to can weld two barrels and draft tube lateral wall welding seam simultaneously, reduce welding stress greatly, treat that barrel and draft tube lateral wall all welds the completion and demolish the support piece, measure the difference of barrel same section maximum internal diameter and minimum internal diameter and be less than 1% of this section internal diameter, satisfy standard requirement, make tube bank and barrel assemble smoothly. The welding material and labor waste caused by the deformation and reworking of the cylinder body are avoided, and the increase of the economic cost of the company is avoided.
Description
Technical Field
The invention relates to the technical field of welding deformation prevention of pressure vessels, in particular to a method for preventing deformation of a split gas compressor two-stage aftercooler shell by assembly welding.
Background
The ethylene device is a petrochemical device which takes petroleum or natural gas as raw materials, mainly produces high-purity ethylene and propylene, and simultaneously produces various petrochemical raw materials as byproducts. The cracking raw material is subjected to high-temperature cracking, compression and separation in an ethylene device to obtain ethylene, and meanwhile, important byproducts such as propylene, butadiene, benzene, toluene, xylene and the like are obtained. The cracking gas compression system of the ethylene device comprises cracking gas compression, acid gas removal, drying and the like. The purpose of the compression system is to remove impurities and to achieve the pressure required for cryogenic separation. Impurities such as acid gas and water in the pyrolysis gas have great harm to cryogenic separation, and the acid gas can poison a catalyst and corrode equipment and pipelines. Water and carbon dioxide can condense into ice and solid hydrates at low temperatures, plugging equipment piping, and affecting separation operations. In order to achieve an ideal heat exchange effect, the shell is designed to be welded with the side wall of the guide cylinder outside the normal cylinder, the side wall of the guide cylinder is welded with the cylinder of the guide cylinder, the cylinder of the guide cylinder is provided with a connecting pipe, 2 side walls of the guide cylinder are required to be welded with 1 cylinder of the guide cylinder, and the number of the guide cylinder is generally 2-3, as shown in the structure of figure 1.
Before the invention, the cylinder body and the side wall of the guide cylinder are welded, a rod type support is arranged in the cylinder body, namely, a circular tube is arranged in the middle, two ends of the circular tube are respectively welded with an arc plate which can be tangent to the inside of the cylinder body, the arc plate and the inside of the cylinder body are in spot welding, so that the function of supporting is realized, because the support points are limited, the cylinder body and the side wall of the guide cylinder can only be welded with one welding line each time, the working efficiency is low, after the whole welding of the cylinder body and the side wall of the guide cylinder is completed, the difference between the maximum inner diameter and the minimum inner diameter of the same section of the cylinder body is measured to be 2% -3% of the inner diameter of the section, the related standard requirement is not more than 1%, in this case, the welding lines of the cylinder body and the side wall of the guide cylinder body are required to be completely separated, and the support is added in the cylinder body, so that the inner diameter of the cylinder body is larger than the requirement of a welding deformation amount is reserved for welding the cylinder body and the side wall of the guide cylinder.
Because the welding stress generated by the large welding quantity of the cylinder body and the side wall of the guide cylinder is large, the production according to the original welding deformation prevention technology has a certain deformation prevention effect but has an unobvious effect, and the rework of the deformation of the cylinder body, which is necessary, causes a great amount of waste of welding materials and labor, thereby increasing the economic cost of a company.
Disclosure of Invention
The invention mainly aims to provide a split gas compressor two-section aftercooler shell assembly welding deformation prevention method which can effectively solve the problems in the background art.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the method for preventing deformation of the shell of the secondary aftercooler of the pyrolysis gas compressor by assembly welding mainly comprises a shell flange, a cylinder body, a butt welding flange, a connecting pipe, an outer head cover side flange, a guide cylinder body and a guide cylinder side wall, and the specific assembly welding method comprises the following steps:
S1, firstly, welding longitudinal seams of a cylinder body, circumferential welds, connecting pipe and butt welding flanges, a first guide cylinder side wall, a second guide cylinder side wall, a third guide cylinder side wall, a fourth guide cylinder side wall, a fifth guide cylinder side wall, a sixth guide cylinder side wall splicing longitudinal seams, a first guide cylinder body, a second guide cylinder body and a third guide cylinder body longitudinal seams;
S2, sleeving the side wall of the first guide cylinder along the outer wall of the cylinder and performing assembly spot welding with the cylinder according to the sequence from left to right, opening a full-welded groove on the side wall of the first guide cylinder, and performing surface welding by adopting manual arc welding to perform backing submerged arc welding;
S3, sleeving the first guide cylinder body into a first guide cylinder side wall along the outer wall of the cylinder body, assembling and spot welding the first guide cylinder body and the first guide cylinder side wall, and reserving proper welding gaps to form a V-shaped groove;
s4, sleeving the side wall of the second guide cylinder into the first guide cylinder along the outer wall of the cylinder for assembly spot welding, reserving proper welding gaps, and forming a single-sided V-shaped welding groove between the side wall of the second guide cylinder and the cylinder;
s5, sleeving the side wall of the third guide cylinder into the cylinder along the outer wall of the cylinder for assembly spot welding, opening a full-welded groove on the side wall of the third guide cylinder, and adopting manual arc welding to perform backing submerged arc welding;
S6, sleeving the second guide cylinder body into the third guide cylinder along the outer wall of the cylinder body, assembling and spot welding the second guide cylinder body and the third guide cylinder side wall, and reserving proper welding gaps to form a V-shaped groove;
s7, sleeving the side wall of the fourth guide cylinder into the second guide cylinder along the outer wall of the cylinder for assembly spot welding, reserving proper welding gaps to form a V-shaped groove, and forming a single-sided V-shaped welding groove between the side wall of the fourth guide cylinder and the cylinder;
s8, sleeving the side wall of the fifth guide cylinder into the V-shaped groove on the side wall of the fifth guide cylinder along the outer wall of the cylinder without spot welding;
s9, sleeving the third guide cylinder body into the fifth guide cylinder along the outer wall of the cylinder body, assembling and spot welding the third guide cylinder body and the fifth guide cylinder side wall, and reserving proper welding gaps to form a V-shaped groove;
s10, sleeving the side wall of the No. six guide cylinder along the outer wall of the cylinder, firstly welding the side wall of the No. six guide cylinder with a full-welded groove of the cylinder, adopting manual arc welding to prime the submerged arc welding cover surface, performing assembly spot welding on the side wall of the No. three guide cylinder and the side wall of the No. six guide cylinder, reserving a proper welding gap to form a V-shaped groove, and performing assembly spot welding on the side wall of the No. five guide cylinder and the side wall of the cylinder;
S11, welding the side wall of the second guide cylinder, the side wall of the fifth guide cylinder, the side wall of the fourth guide cylinder, the side wall of the fifth guide cylinder and the side wall of the sixth guide cylinder after the assembly of the first guide cylinder body, the second guide cylinder body, the third guide cylinder body and the cylinder body is completed, welding the side wall of the second guide cylinder, the side wall of the fifth guide cylinder and the cylinder body, welding the side wall of the fourth guide cylinder and the cylinder body, and adopting manual arc welding to prime the submerged arc welding cover surface.
Preferably, the support piece is welded in the cylinder body at the corresponding position of the side wall of each guide cylinder before welding.
Preferably, a first guide cylinder side wall, a third guide cylinder side wall, a fifth guide cylinder side wall and a guide cylinder body are welded, a second guide cylinder side wall, a fourth guide cylinder side wall, a sixth guide cylinder side wall and a guide cylinder body are welded, and a manual arc welding bottoming submerged arc welding cover surface is adopted.
Preferably, the cylinder body is assembled and welded with the flange of the shell and the side flange of the outer head cover, and the opening of the guide cylinder is welded with the connecting pipe.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, before the cylinder body is welded with the side wall of each guide cylinder, the inner wall of the cylinder body is welded with a firm annular whole circle of supporting piece in a spot welding manner, and welding seams of the two cylinder bodies and the side wall of the guide cylinder can be welded at the same time, so that the welding stress is greatly reduced, the supporting piece is removed after the whole welding of the cylinder body and the side wall of the guide cylinder is completed, and the difference between the maximum inner diameter and the minimum inner diameter of the same section of the cylinder body is measured to be less than 1% of the inner diameter of the section, so that the standard requirement is met, and the tube bundle and the cylinder body are assembled smoothly. The welding material and labor waste caused by the deformation and reworking of the cylinder body are avoided, and the increase of the economic cost of the company is avoided.
Drawings
FIG. 1 is a schematic diagram of a welded structure of a two-stage aftercooler housing of the present invention;
FIG. 2 is a schematic diagram of a welded end face of a two-stage aftercooler housing of the present invention;
FIG. 3 is a schematic view of a welded partial structure of a two-stage aftercooler housing of the present invention;
FIG. 4 is a schematic diagram of a welded partial structure of a two-stage aftercooler housing according to the present invention;
FIG. 5 is a schematic diagram III of a welded partial structure of a two-stage aftercooler housing according to the present invention;
FIG. 6 is a schematic diagram of a welded partial structure of a two-stage aftercooler housing of the present invention;
Fig. 7 is a schematic diagram of a welded partial structure of a two-stage aftercooler housing according to the present invention.
In the figure: 1. a housing flange; 2. a cylinder; 3. a first guide cylinder side wall; 4. a first guide cylinder body; 5. the side wall of the second guide cylinder; 6. the side wall of the third guide cylinder; 7. a second guide cylinder body; 8. the side wall of the fourth guide cylinder; 9. a fifth guide cylinder side wall; 10. a third guide cylinder body; 11. the side wall of the sixth guide cylinder; 12. butt welding the flange; 13. connecting pipe; 14. an outer head cover side flange; 15. and a support.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1-3, a method for preventing deformation of a two-stage aftercooler shell of a pyrolysis gas compressor during assembly welding mainly comprises a shell flange 1, a cylinder 2, a butt welding flange 12, a connecting pipe 13, an outer head cover side flange 14, a guide cylinder body and a guide cylinder side wall, wherein the specific assembly welding sequence is as follows:
1. firstly, finishing welding longitudinal and circumferential weld joints of the cylinder body 2, welding the connecting pipe 13 with the outer head cover side flange 14, splicing welding the side wall of the guide cylinder and welding the longitudinal weld joint of the guide cylinder body;
2. Sleeving a first guide cylinder side wall 3 along the outer wall of the cylinder body from left to right according to the cylinder body 2, performing assembly spot welding with the cylinder body 2, opening a full-welding groove on the first guide cylinder side wall 3 according to FIG. 3, and performing arc welding to form a backing submerged arc welding cover surface;
3. Sleeving a first guide cylinder body 4 along the outer wall of the cylinder body 2, performing group-to-group spot welding on the guide cylinder body and the side wall 3 of the first guide cylinder, and reserving a gap of 3mm to form a V-shaped groove according to FIG. 6;
4. sleeving the second guide cylinder side wall 5 along the outer wall of the cylinder 2, performing group-to-group spot welding with the first guide cylinder 4, reserving a welding gap of 3mm according to fig. 7, and forming a V-shaped groove, wherein the welding groove between the second guide cylinder side wall 5 and the cylinder 2 is single-sided V-shaped, and according to fig. 4;
5. Sleeving the side wall 6 of the third guide cylinder into the barrel 2 along the outer wall of the barrel 2 for assembly and spot welding, opening a full-welding groove according to the figure 3, and adopting manual arc welding to perform backing submerged arc welding cover welding;
6. sleeving a second guide cylinder body 7 along the outer wall of the cylinder body 2, performing group-to-group spot welding on the second guide cylinder body and the third guide cylinder side wall 6, and reserving a welding gap of 3mm according to FIG. 6 to form a V-shaped groove;
7. sleeving the side wall 8 of the fourth guide cylinder into the barrel 7 of the second guide cylinder along the outer wall of the barrel 2 for butt welding, reserving a welding gap of 3mm according to fig. 7, and forming a V-shaped groove, wherein the welding groove between the side wall 8 of the fourth guide cylinder and the barrel 2 is single-sided V-shaped, and according to fig. 4;
8. sleeving the side wall 9 of the fifth guide cylinder along the outer wall of the cylinder body 2, forming a single-sided V-shaped groove on the side wall 9 of the fifth guide cylinder according to the figure 5, and not performing spot welding with the cylinder body 2;
9. Sleeving a third guide cylinder body 10 into a fifth guide cylinder side wall 9 along the outer wall of the cylinder body 2 for assembly spot welding, and reserving a welding gap of 3mm according to FIG. 6 to form a V-shaped groove;
10. Sleeving a full-penetration groove formed between the side wall 11 of the sixth guide cylinder and the cylinder 2 according to the figure 3 along the outer wall of the cylinder 2, performing submerged arc welding with a manual arc welding backing, performing spot welding with the cylinder 10 of the third guide cylinder, reserving a welding gap of 3mm according to the figure 7, performing spot welding with the side wall 9 of the fifth guide cylinder, and reserving a welding gap of 3mm according to the figure 5, and forming a V-shaped groove;
11. After the side wall of the guide cylinder, the guide cylinder body and the cylinder body 2 are assembled, welding the side wall 5 of the guide cylinder II, the side wall 9 of the guide cylinder V and the cylinder body 2, and then welding the side wall 8 of the guide cylinder V and the cylinder body 2, and adopting manual arc welding to prime the submerged arc welding cover surface;
12. Before welding, an anti-deformation support piece 15 is required to be welded in the cylinder body at the corresponding position of the side wall of each guide cylinder, as shown in fig. 2;
13. Welding a first guide cylinder side wall 3, a third guide cylinder side wall 6, a fifth guide cylinder side wall 9 and a guide cylinder body, welding a second guide cylinder side wall 5, a fourth guide cylinder side wall 8, a sixth guide cylinder side wall 11 and a guide cylinder body, adopting manual arc welding to prime the submerged arc welding cover surface, and adopting manual arc welding to prime the submerged arc welding cover surface;
14. The cylinder body 2 is assembled and welded with the shell flange 1 and the outer head cover side flange 14, and the guide cylinder opening is welded with the connecting pipe 13.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A split gas compressor two-section aftercooler shell assembly welding deformation prevention method is characterized by comprising the following steps of: the aftercooler shell structure mainly comprises a shell flange (1), a barrel (2), a butt welding flange (12), a connecting pipe (13), an outer head cover side flange (14) and a guide cylinder barrel and guide cylinder side wall, wherein the specific assembly welding method comprises the following steps:
S1, firstly, welding longitudinal seams and circumferential welds of a cylinder body (2), a connecting pipe (13) and butt welding flanges (12), a first guide cylinder side wall (3), a second guide cylinder side wall (5), a third guide cylinder side wall (6), a fourth guide cylinder side wall (8), a fifth guide cylinder side wall (9), a sixth guide cylinder side wall (11) and a first guide cylinder body (4), a second guide cylinder body (7) and a third guide cylinder body (10) are spliced;
S2, sleeving a first guide cylinder side wall (3) along the outer wall of the cylinder (2) in sequence from left to right according to the cylinder (2), assembling and spot welding with the cylinder (2), opening a full-welded groove on the first guide cylinder side wall (3), and performing submerged arc welding to obtain a backing submerged arc welding cover surface;
S3, sleeving a first guide cylinder body (4) into a first guide cylinder side wall (3) along the outer wall of the cylinder body (2) for assembly and spot welding, and reserving a proper welding gap to form a V-shaped groove;
S4, sleeving the second guide cylinder side wall (5) into a first guide cylinder (4) along the outer wall of the cylinder (2) for assembly and spot welding, and reserving a proper welding gap, wherein a welding groove between the second guide cylinder side wall (5) and the cylinder (2) is of a single-sided V shape;
S5, sleeving the side wall (6) of the third guide cylinder into a group of spot welding with the cylinder (2) along the outer wall of the cylinder (2), opening a full-welding groove on the side wall (6) of the third guide cylinder, and performing submerged arc welding with a manual arc welding bottoming submerged arc welding cover surface;
S6, sleeving the second guide cylinder body (7) into the third guide cylinder side wall (6) along the outer wall of the cylinder body (2) for assembly and spot welding, and reserving a proper welding gap to form a V-shaped groove;
S7, sleeving the side wall (8) of the fourth guide cylinder into a second guide cylinder body (7) along the outer wall of the cylinder body (2) for assembly spot welding, reserving a proper welding gap to form a V-shaped groove, and forming a single-sided V-shaped welding groove between the side wall (8) of the fourth guide cylinder and the cylinder body (2);
S8, sleeving the side wall (9) of the fifth guide cylinder into a single-face V-shaped groove along the outer wall of the cylinder body (2) without spot welding;
s9, sleeving the third guide cylinder body (10) into the fifth guide cylinder side wall (9) along the outer wall of the cylinder body (2) for assembly and spot welding, and reserving a proper welding gap to form a V-shaped groove;
S10, sleeving a side wall (11) of the six guide cylinder along the outer wall of the cylinder body (2), firstly, fully welding the side wall (11) of the six guide cylinder with the cylinder body (2) by using a full-welding groove, adopting manual arc welding to render a submerged arc welding cover surface, performing group-welding on the side wall (11) of the six guide cylinder, reserving a proper welding gap to form a V-shaped groove, and performing group-welding on the side wall (9) of the five guide cylinders with the cylinder body (2);
S11, a guide cylinder side wall (3), a second guide cylinder side wall (5), a third guide cylinder side wall (6), a fourth guide cylinder side wall (8), a fifth guide cylinder side wall (9), a sixth guide cylinder side wall (11), a guide cylinder body (4), a second guide cylinder body (7), a third guide cylinder body (10) and a cylinder body (2) are assembled, the second guide cylinder side wall (5), the fifth guide cylinder side wall (9) and the cylinder body (2) are welded firstly, then the fourth guide cylinder side wall (8) and the cylinder body (2) are welded, and a manual arc welding backing submerged arc welding cover surface is adopted.
2. The method for preventing deformation of the shell of the secondary aftercooler of the pyrolysis gas compressor by assembly welding according to claim 1, wherein the method comprises the following steps of: and before welding, a supporting piece (15) is welded in the cylinder body at the corresponding position of the side wall of each guide cylinder.
3. The method for preventing deformation of the shell of the secondary aftercooler of the pyrolysis gas compressor by assembly welding according to claim 1, wherein the method comprises the following steps of: welding a first guide cylinder side wall (3), a third guide cylinder side wall (6), a fifth guide cylinder side wall (9) and a guide cylinder body, welding a second guide cylinder side wall (5), a fourth guide cylinder side wall (8), a sixth guide cylinder side wall (11) and a guide cylinder body, and adopting manual arc welding to prime the submerged arc welding cover surface.
4. The method for preventing deformation of the shell of the secondary aftercooler of the pyrolysis gas compressor by assembly welding according to claim 1, wherein the method comprises the following steps of: the cylinder body (2) is assembled and welded with the shell flange (1) and the outer head cover side flange (14), and the guide cylinder opening is welded with the connecting pipe (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410079743.6A CN118023650A (en) | 2024-01-19 | 2024-01-19 | Method for preventing deformation of split gas compressor by assembling and welding two-stage aftercooler shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410079743.6A CN118023650A (en) | 2024-01-19 | 2024-01-19 | Method for preventing deformation of split gas compressor by assembling and welding two-stage aftercooler shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118023650A true CN118023650A (en) | 2024-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410079743.6A Pending CN118023650A (en) | 2024-01-19 | 2024-01-19 | Method for preventing deformation of split gas compressor by assembling and welding two-stage aftercooler shell |
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| Country | Link |
|---|---|
| CN (1) | CN118023650A (en) |
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- 2024-01-19 CN CN202410079743.6A patent/CN118023650A/en active Pending
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