CN105618926B - The system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest - Google Patents
The system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest Download PDFInfo
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- CN105618926B CN105618926B CN201610111374.XA CN201610111374A CN105618926B CN 105618926 B CN105618926 B CN 105618926B CN 201610111374 A CN201610111374 A CN 201610111374A CN 105618926 B CN105618926 B CN 105618926B
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- stainless steel
- steel pipes
- welding
- air separation
- ice chest
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during welding
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Abstract
The present invention relates to a kind of system of stainless steel pipes in Large Air Separation Devices ice chest to inflate welding method, comprises the following steps：Set up welding scaffold and temporary operating platform；If stainless steel pipes are integrally divided into dry systems and each system is divided into some subsystems；The lifting of stainless steel pipes in place with group pair；Each system is isolated using special blind plate and isolates each subsystem using temporary stop plate；Sub-system inflation welding and ray detection；Remove temporary stop plate and welding and ray detection are inflated to each system；Line replacement is entered to the air of each system dry oil free；Carry out air pressure test；Remove special blind plate and stainless steel pipes are integrally inflated with welding and ray detection；Finally stainless steel pipes entirety air-tight test and system are recovered.The present invention improves the efficiency of construction, shortens the duration, avoids a large amount of wastes of argon gas, reduces cost, avoids high-altitude repeated inflation, reduces construction risk.
Description
Technical field
The invention belongs to the technical field of air separation cooling box construction, more particularly to stainless steel tube in a kind of Large Air Separation Devices ice chest
The system inflation welding method in road.
Background technology
Operating temperature is cryogenic (about -190 DEG C) in air separation cooling box, therefore to air separation cooling box inside stainless steel pipes
Welding quality requires very high.The welding generally use argon-filled protection welding of stainless steel pipes, makes inside pipeline not in air separation cooling box
Oxide can be produced, to ensure welding quality.But stainless steel pipes system process is complicated in air separation cooling box, using one
As argon-filled protection welding method need successively to inflate each weld bond, it is low construction efficiency, long in time limit, argon gas waste it is more, and
Narrow space in air separation cooling box, it is larger that welding potential safety hazard is inflated to each weld bond successively.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of system inflation of stainless steel pipes in Large Air Separation Devices ice chest
Welding method, efficiency of construction is improved, reduce argon gas and waste, improve working security.
The technical solution adopted for the present invention to solve the technical problems is to provide stainless steel tube in a kind of Large Air Separation Devices ice chest
The system inflation welding method in road, comprises the following steps：
(1) stainless steel pipes welding scaffold and temporary operating platform in Large Air Separation Devices ice chest are set up；
(2) if stainless steel pipes are integrally divided into dry systems according to the design pressure of argon-filled protection, by each system size,
Continue each system being divided into some subsystems in the position of fixed weld bond；
(3) lifting of stainless steel pipes in place with group pair；
(4) isolated if welding special blind plate between dry systems, isolated between some subsystems using temporary stop plate,
Safety valve is blocked using blind plate or plug；
(5) stainless steel pipes of sub-system are inflated welding and ray detection；
(6) temporary stop plate between subsystem is removed, welding is inflated respectively to the stainless steel pipes of each system and penetrated
Line detects；
(7) line replacement is entered with the air of dry oil free respectively to the stainless steel pipes of each system；
(8) air pressure test is carried out respectively to the stainless steel pipes of each system with the air of dry oil free；
(9) the special blind plate between each system is removed, weldering is integrally inflated to stainless steel pipes in Large Air Separation Devices ice chest
Connect and ray detection；
(10) stainless steel pipes entirety air-tight test and system are recovered in Large Air Separation Devices ice chest.
As a kind of preferred embodiment of the present invention, when integrally being divided to stainless steel pipes in the step (2),
Determining the inflation inlet and vent position of each system and its each subsystem, it is ensured that all exhaust outlets are led to outside air separation cooling box,
The valve for determining each system and its each subsystem internal is opened, the valve on border is turned off.
As the further improvement to above-mentioned embodiment, the step (5) comprises the following steps：
(a) after per pass fixation weld bond is wrapped up with tinfoil in sub-system, twice are tightly twined with adhesive tape；
(b) whether the open and-shut mode for being operated with interim source of the gas and detecting each valve meets the requirement of step (2)；
(c) sub-system is inflated；
(d) argon concentration of sub-system exhaust outlet is detected, can be to fixation when argon concentration reaches more than 99%
Weld bond is welded；
(e) each fixed weld bond is welded successively by the order of subsystem " air inlet-exhaust outlet ", welding each fixed weld bond
When should be welded when throwing off adhesive tape and tinfoil.
As the further improvement to above-mentioned embodiment, used in the operating process of the step (c) to step (e)
Axial flow blower keeps the flowing of welding region gas, and detects the oxygen concentration of welding region at any time using oxygen analyser.
As another preferred embodiment of the present invention, the thickness of the special blind plate in the step (4) is according to each system
The pressure of air pressure test of uniting and pipe diameter size are calculated and obtained, and the special blind plate takes the mode of full weld to be welded.
As another preferred embodiment of the present invention, the temporary stop plate in the step (5) is stainless steel thick 2mm
Plate.
As another preferred embodiment of the present invention, the system inflation of the step (5), step (6) and step (9)
Using the source of inflation gas of low temperature liquid argon basin and vaporizer as argon gas.
As another preferred embodiment of the present invention, all fixations in the step (5), step (6) and step (9)
Weld bond must carry out 100% ray detection.
As another preferred embodiment of the present invention, the pressure that air pressure is tested in the step (8) is argon-filled protection
1.15 times of design pressure.
Beneficial effect
Stainless steel pipes are divided into by the present invention using the system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest
Several systems, each system are divided into several subsystems again, using first welding subsystem, then weld each system, finally weld
In whole air separation cooling box the division of stainless steel pipes carry out, progressive welding method, each system can be with parallel construction, favorably
In the efficiency for improving construction, the welding duration is shortened, and avoids each weld bond and is respectively welded to using caused by argon gas
It is a large amount of to waste, construction cost is advantageously reduced, in addition, avoiding high-altitude repeated inflation, reduces construction risk, is also beneficial to protect
Hinder welding quality.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.In addition, it is to be understood that after the content of the invention lectured has been read, people in the art
Member can make various changes or modifications to the present invention, and these equivalent form of values equally fall within the application appended claims and limited
Scope.
The system inflation welding method of stainless steel pipes, specifically includes following steps in a kind of Large Air Separation Devices ice chest：
(1) stainless steel pipes welding scaffold and temporary operating platform in Large Air Separation Devices ice chest are set up.
(2) if stainless steel pipes are integrally divided into dry systems according to the design pressure of argon-filled protection, by each system size,
Continue each system being divided into some subsystems in the position of fixed weld bond.When integrally being divided to stainless steel pipes, need
Determine the inflation inlet and vent position of each system and its each subsystem, it is ensured that all exhaust outlets are drawn to air separation cooling box
Outside, ensure that the argon gas of pipeline internal protection is discharged to outside air separation cooling box from exhaust outlet, determine each system and its each subsystem
Valve inside system is opened, the valve on border is turned off.
(3) lifting of stainless steel pipes in place with group pair.
(4) isolated if welding special blind plate between dry systems, the thickness of special blind plate is according in below step (8)
The pressure of air pressure test and the size of caliber of each system are calculated and obtained, and special blind plate takes the mode of full weld to be welded.If
Isolated between dry subsystem using temporary stop plate, temporary stop plate uses stainless steel plate of the thickness for 2mm, and safety valve is using blind
Plate or plug closure.
(5) stainless steel pipes of sub-system are inflated welding and ray detection, comprise the following steps：
(a) after per pass fixation weld bond is wrapped up with tinfoil in sub-system, twice are tightly twined with adhesive tape；
(b) whether the open and-shut mode for being operated with interim source of the gas and detecting each valve meets the requirement of step (2)；
(c) sub-system is inflated；
(d) argon concentration of sub-system exhaust outlet is detected, can be to fixation when argon concentration reaches more than 99%
Weld bond is welded；
(e) each fixed weld bond is welded successively by the order of subsystem " air inlet-exhaust outlet ", welding each fixed weld bond
When should be welded when throwing off adhesive tape and tinfoil.
In order to ensure the life security of welding personnel, must be used in the operating process of above-mentioned steps (c) to step (e)
Axial flow blower keeps the flowing of welding region gas, avoids regional area argon concentration too high and the life and health of operating personnel is made
Into threat.In addition, also to detect the oxygen concentration of welding region at any time using oxygen analyser simultaneously.
(6) temporary stop plate between subsystem is removed, welding is inflated respectively to the stainless steel pipes of each system and penetrated
Line detects.
(7) line replacement is entered with the air of dry oil free respectively to the stainless steel pipes of each system.
(8) stainless steel pipes of each system are carried out with air pressure test, the pressure of air pressure test respectively with the air of dry oil free
Power is 1.15 times of argon-filled protection design pressure.
(9) the special blind plate between each system is removed, weldering is integrally inflated to stainless steel pipes in Large Air Separation Devices ice chest
Connect and ray detection.
(10) stainless steel pipes entirety air-tight test and system are recovered in Large Air Separation Devices ice chest.
In above-mentioned step, the system inflation of the step (5), step (6) and step (9) uses low temperature liquid argon basin
With source of inflation gas of the vaporizer as argon gas, and all fixed weld bonds must be carried out in step (5), step (6) and step (9)
100% ray detection.
It is not difficult to find out, the system inflation welding method of stainless steel pipes in this Large Air Separation Devices ice chest, there is division to weld,
The characteristics of progressive, each system, with parallel construction, can be advantageous to improve the efficiency of construction, shorten the welding duration, and
Avoid each weld bond and be respectively welded and largely wasted to caused by using argon gas, construction cost is advantageously reduced, in addition, avoiding
High-altitude repeated inflation, reduces construction risk, is also beneficial to ensure welding quality.
Claims (9)
1. the system inflation welding method of stainless steel pipes, comprises the following steps in a kind of Large Air Separation Devices ice chest：
(1) stainless steel pipes welding scaffold and temporary operating platform in Large Air Separation Devices ice chest are set up；
(2) if stainless steel pipes are integrally divided into dry systems according to the design pressure of argon-filled protection, by each system size, fixation
Continue each system being divided into some subsystems in the position of weld bond；
(3) lifting of stainless steel pipes in place with group pair；
(4) isolated if welding special blind plate between dry systems, isolated between some subsystems using temporary stop plate, safety
Valve is blocked using blind plate or plug；
(5) stainless steel pipes of sub-system are inflated welding and ray detection；
(6) temporary stop plate between subsystem is removed, welding is inflated respectively to the stainless steel pipes of each system and ray is examined
Survey；
(7) line replacement is entered with the air of dry oil free respectively to the stainless steel pipes of each system；
(8) air pressure test is carried out respectively to the stainless steel pipes of each system with the air of dry oil free；
(9) remove the special blind plate between each system, stainless steel pipes in Large Air Separation Devices ice chest are integrally inflated welding and
Ray detection；
(10) stainless steel pipes entirety air-tight test and system are recovered in Large Air Separation Devices ice chest.
2. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：When integrally being divided to stainless steel pipes in the step (2), the inflation inlet of each system and its each subsystem is determined
And vent position, it is ensured that all exhaust outlets are led to outside air separation cooling box, determine the valve of each system and its each subsystem internal
Door is opened, the valve on border is turned off.
3. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 2, it is special
Sign is：The step (5) comprises the following steps：
(a) after per pass fixation weld bond is wrapped up with tinfoil in sub-system, twice are tightly twined with adhesive tape；
(b) whether the open and-shut mode for being operated with interim source of the gas and detecting each valve meets the requirement of step (2)；
(c) sub-system is inflated；
(d) argon concentration of sub-system exhaust outlet is detected, can be to fixed weld bond when argon concentration reaches more than 99%
Welded；
(e) each fixed weld bond is welded successively by the order of subsystem " air inlet-exhaust outlet ", should when welding each fixed weld bond
Welded when throwing off adhesive tape and tinfoil.
4. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 3, it is special
Sign is：The step (c) keeps welding region gas to flow into the operating process of step (e) using axial flow blower, and makes
Detect the oxygen concentration of welding region at any time with oxygen analyser.
5. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：The pressure and pipe diameter size that the thickness of special blind plate in the step (4) is tested according to each system air pressure are calculated and obtained
, the special blind plate takes the mode of full weld to be welded.
6. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：Temporary stop plate in the step (4) is stainless steel plate thick 2mm.
7. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：The system inflation of the step (5), step (6) and step (9) is using low temperature liquid argon basin and vaporizer as argon gas
Source of inflation gas.
8. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：All fixed weld bonds must carry out 100% ray detection in the step (5), step (6) and step (9).
9. the system inflation welding method of stainless steel pipes in a kind of Large Air Separation Devices ice chest according to claim 1, it is special
Sign is：The pressure that air pressure is tested in the step (8) is 1.15 times of argon-filled protection design pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610111374.XA CN105618926B (en) | 2016-02-29 | 2016-02-29 | The system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610111374.XA CN105618926B (en) | 2016-02-29 | 2016-02-29 | The system inflation welding method of stainless steel pipes in Large Air Separation Devices ice chest |
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| CN105618926A CN105618926A (en) | 2016-06-01 |
| CN105618926B true CN105618926B (en) | 2018-04-03 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH637559A5 (en) * | 1976-09-09 | 1983-08-15 | Messer Griesheim Gmbh | Method of making burr-free severing cuts in plasma-cutting |
| FR2968585A3 (en) * | 2010-12-09 | 2012-06-15 | Air Liquide | Connecting tubular elements that are useful in air separation device, comprises connecting first end of first tubular element with second end of second tubular element, and closing first and second elements at first and second points |
| CN102773619A (en) * | 2012-07-02 | 2012-11-14 | 林德工程（杭州）有限公司 | Vertical type assembly welding method for space division aluminum tower |
| CN102922096A (en) * | 2012-10-19 | 2013-02-13 | 林德工程（杭州）有限公司 | On-site assembly welding method for large aluminum tower |
| CN104746894A (en) * | 2015-03-27 | 2015-07-01 | 中冶天工上海十三冶建设有限公司 | Modularized detaching construction method for large air separator cold box |
| CN105239763A (en) * | 2015-09-22 | 2016-01-13 | 上海十三冶建设有限公司 | Scaffold for modularized construction of air separation cold box |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9399530B2 (en) * | 2013-05-24 | 2016-07-26 | L'Air Liquide, Société Anonyme Pour L'Étude Et L'Exploitation Des Procedes Georges Claude | System for moving heavy objects about a remote manufacturing yard |
-
2016
- 2016-02-29 CN CN201610111374.XA patent/CN105618926B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH637559A5 (en) * | 1976-09-09 | 1983-08-15 | Messer Griesheim Gmbh | Method of making burr-free severing cuts in plasma-cutting |
| FR2968585A3 (en) * | 2010-12-09 | 2012-06-15 | Air Liquide | Connecting tubular elements that are useful in air separation device, comprises connecting first end of first tubular element with second end of second tubular element, and closing first and second elements at first and second points |
| CN102773619A (en) * | 2012-07-02 | 2012-11-14 | 林德工程（杭州）有限公司 | Vertical type assembly welding method for space division aluminum tower |
| CN102922096A (en) * | 2012-10-19 | 2013-02-13 | 林德工程（杭州）有限公司 | On-site assembly welding method for large aluminum tower |
| CN104746894A (en) * | 2015-03-27 | 2015-07-01 | 中冶天工上海十三冶建设有限公司 | Modularized detaching construction method for large air separator cold box |
| CN105239763A (en) * | 2015-09-22 | 2016-01-13 | 上海十三冶建设有限公司 | Scaffold for modularized construction of air separation cold box |
Non-Patent Citations (4)
| Title |
|---|
| 43000Nm3/h空分装置冷箱施工技术;李常政;《安装》;20130831(第8期);第22-23页 * |
| LNG冷能空分装置低温工艺管道施工技术;章东云;《石油化工建设》;20120430;第38卷(第2期);第26-30页 * |
| 大型空分装置冷箱内铝合金焊接施工技术;罗红发;《石油工程建设》;20081031;第34卷(第5期);第52-56页 * |
| 空分工程冷箱试压方案（SP）;新浦化学（泰兴）有限公司;《百度文库》;20120316;第1-12页 * |
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| CN105618926A (en) | 2016-06-01 |
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Address after: Room A, Room 403, 1325 Mudanjiang Road, Baoshan District, Shanghai, 20199 Patentee after: SHANGHAI ERSHIYE CONSTRUCTION Co.,Ltd. Address before: Room A, Room 403, 1325 Mudanjiang Road, Baoshan District, Shanghai, 20199 Patentee before: SHANGHAI MCC13 CONSTRUCTION Co.,Ltd. |
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Effective date of registration: 20190627 Address after: Room A, Room 403, 1325 Mudanjiang Road, Baoshan District, Shanghai, 20199 Co-patentee after: CHINA MCC20 GROUP Corp.,Ltd. Patentee after: SHANGHAI ERSHIYE CONSTRUCTION Co.,Ltd. Address before: Room A, Room 403, 1325 Mudanjiang Road, Baoshan District, Shanghai, 20199 Patentee before: SHANGHAI ERSHIYE CONSTRUCTION Co.,Ltd. |
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