CN103437834A - Stress-free mounting method of flange at inlet steam pipe section of turbine - Google Patents
Stress-free mounting method of flange at inlet steam pipe section of turbine Download PDFInfo
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- CN103437834A CN103437834A CN2013103909929A CN201310390992A CN103437834A CN 103437834 A CN103437834 A CN 103437834A CN 2013103909929 A CN2013103909929 A CN 2013103909929A CN 201310390992 A CN201310390992 A CN 201310390992A CN 103437834 A CN103437834 A CN 103437834A
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Abstract
The invention discloses a stress-free mounting method of a flange at the inlet steam pipe section of a turbine. The stress-free mounting method of the flange at the inlet steam pipe section of the turbine comprises the following steps: sequentially welding a mounting flange, a reducer pipe and a straight pipe into a whole; welding the fourth welding line between the other end of a bent pipe and a main pipe; carrying out symmetrical backing welding on the third welding line through using argon arc welding by two welders at the same time, respectively observing the values of two axial dial indicators and two radial dial indicators on the turbine flange, and when the pointers of the two radial dial indicators point at 0, carrying out symmetrical welding by two welders at the same time; when the pointers of the two radial dial indicators do not point at 0, observing the change, measured by the two axial dial indicators, of a gap between the turbine flange and the mounting flange 3, carrying out filling welding in the range of 120 degrees of the circle of the third welding line at the position with small gap between the turbine flange and the mounting flange, and repeating the filling welding until the third welding line is welded completely.
Description
Technical field
The present invention relates to derived energy chemical, petrochemical industry, electric power, metallurgical industry steam turbine compressor bank import and export pipeline section Stressless Pipeline Connection field.Specially refer to steam turbine inlet steam pipeline section Stressless Pipeline Connection field.
Background technique
In derived energy chemical, petrochemical industry, electric power, metallurgy industry.All need steam turbine to drive the main equipments such as generator, compressor bank as power equipment.The power source of steam turbine is that high temperature, the high pressure steam carried by the steam boiler steam turbine of getting excited rotates.Pipeline welding by long distance between steam turbine and steam boiler forms, and only having steam turbine steam inlet and the steam (vapor) outlet of pipeline is to carry out bolt by companion flange to be connected.
According to code requirement; reply steam turbine import pipeline section carries out Stressless Pipeline Connection: pipeline section should be in free state when being connected with equipment; popular saying is exactly the flange at pipe fitting and equipment connection place in the situation that do not have bolt can keep freely plane contact; unload the flange bolt on lower linking tube; under free state, all bolts should be able to pass smoothly in bolt hole; parallel deviation between flange facing, radial missing and spacing value up to specification (being called for short unstressed), state only in this way could be protected equipment to the full extent.Due to permissible error value minimum (the GB50236 standard: 3000 rev/mins～6000 rev/mins, parallelism is 0.15mm, concentricity 0.5mm), this accomplishes unstressed connection to the flange pipeline section, by weld seam, in welding process, regulated, difficulty is very large, and installation period is long.
Steam-turbine unit suction flange and pipeline section flange are equipped, as the parallelism at the free state lower flange, concentricity do not reach code requirement, when connecting, bolt must produce radial pull and axial tension to steam turbine set, will make to have installed steam turbine and the compressor that centering is qualified and produce displacement, thereby destroyed the coaxality between steam turbine and compressor, steam-turbine unit vibration when driving is large, cause bearing shell, sealing, damage when serious, rotor bow, steam-turbine unit can't move, and makes built factory delay to go into operation.
Common way is to take the machine flange mouth as benchmark, and pipe arrangement outwards freely connects.First pipe laying support, be not applied on machine the weight such as pipeline and valve and additional moment, and pipeline section fixedly weld bond be chosen in four bend pipes part in addition, totally more far better, while avoiding welding because the inhomogeneous contraction of weld seam produces stress to machine.But steam turbine inlet steam pipeline section can't be take the method that the machine flange mouth is benchmark and be carried out pipe arrangement, because the high temperature from boiler to the steam turbine entrance, high pressure steam line whole process are all welding weld bonds, middle flangeless conjunction.To carry out steam blowing after pipeline install to finish, must stay one section pipeline section uneasiness to pretend as the steam blowing mouth, purge after qualified this pipeline section is installed again.
Should fixedly weld bond of twice be arranged reserved pipeline section, be fixedly weld bond and vertical fixedly weld bond of level, common way: 1, the position of reserved pipeline section all is chosen in to steam turbine the most nearby, it is right that the counterpart method is that the twice weld bond is organized simultaneously, the problem produced is: when the welding of weldering first fixing port, stress has appearred in another road fixing port; 2, successively welding sequence is not considered, the problem produced is: if horizontal fixing port first welds, so that vertically fixedly weld bond adjusts mouthful, when polishing produce splash directly enter in pipe can't be clearly in, splash and can damage the steam turbine internals when serious, fixedly weld bond as vertical as first weldering first welds, while adjusting mouthful with horizontal fixing port, weld heat input changes along with the change of welding position, and corresponding welding is shunk inhomogeneous.3, welding procedure is two people balanced weldings simultaneously, the problem produced is: these twice fixedly groove of weld bond are on-the-spot manual polishings, according to on-the-spot set of circumstances pair, certainly lead to alignment clearance and the gradient is inhomogeneous, if two people are balanced welding simultaneously, weld seam produces inhomogeneous contraction, and the orientation that flange is large to contour projector tilts.4, welding bead continuous welding, the problem of generation is: do not do the welding bead adjustment in welding process, interpass temperature is high, inaccurate to the measurement of deviate.Because above problem causes the flanged surface parallelism, the concentricity value exceeds standard, and flange is along circumferential deflection, and repair rate is high, and the cycle of reprocessing is long, and generally the weld seam minimum of one φ 377 * 40 will be welded one week, and some projects reach a wheat harvesting period and also have been difficult to.
The unstressed assembly method of this steam turbine set inlet steam pipeline section companion flange, overcome the deficiency in existing Stressless Pipeline Connection, a kind of rational installation method is provided, weld seam for one φ 377 * 40 completed at 10 hours substantially, solder yield 100%, the present invention is applicable to various rotary machine pipeline Stressless Pipeline Connections.
Summary of the invention
Goal of the invention of the present invention is to overcome the method that there is the stress assembling in existing steam turbine inlet steam pipeline section flange, and the method for the unstressed assembling of a kind of steam turbine inlet steam pipeline section flange is provided.
In order to complete the application's goal of the invention, the application by the following technical solutions:
The method of the unstressed assembling of a kind of steam turbine inlet steam pipeline section flange of the present invention, it is that assembly flange, reducer pipe, straight tube, bend pipe and main line and steam turbine flange are carried out to unstressed assembling, in assembly process, assembly flange, reducer pipe, straight tube, bend pipe and main line are welded, assembly flange carries out bolt with the steam turbine flange and is connected, weld seam comprises: the first weld seam between assembly flange and reducer pipe, the second weld seam between reducer pipe and straight tube, the 3rd weld seam between straight tube and bend pipe, the 4th weld seam between bend pipe and main line, wherein:
(a) first that assembly flange, reducer pipe and straight tube is integrally welded successively;
(b) radially dial gauge of two axial dial gauges and two is housed on the steam turbine flange, two axial dial gauges are separated by 90 ° on the circumference of steam turbine flange; Two radially dial gauge on the circumference of steam turbine flange, be separated by 90 °, two axial dial gauges and two the radially pointer of dial gauge table adjust to 0; Assembly flange is fixed by bolts on the steam turbine flange, vertically downward, take the lower end of straight tube is benchmark to straight tube, an end of bend pipe is aimed to the lower end of straight tube, the bend pipe the other end is aimed at main line, then the 4th weld seam between the bend pipe the other end and main line is welded;
(c) end at straight tube and bend pipe links together straight tube and bend pipe with 4-6 piece backboard, and every backboard point is welded on straight tube and bend pipe, then unclamps the bolt be fixed on assembly flange and steam turbine flange, makes straight tube be in the free state welding;
(d) in the process of welding the 3rd weld seam, adopt argon arc welding to carry out the bottoming welding, by two welders, be symmetrically welded simultaneously;
(e) after bottoming has been welded, observe respectively the radially numerical value of dial gauge of the numerical value of two axial dial gauges on the steam turbine flange and two, when two radially the pointer of dial gauge is 0, by two welders, be symmetrically welded simultaneously, when two radially the pointer of dial gauge is not 0, observe the variation in gap between the measured steam turbine flange of two axial dial gauges and assembly flange 3, fill welding in 120 ° of scopes of the 3rd weld seam circumference by a welder facing to place, little orientation, gap between steam turbine flange and assembly flange, after filling every one deck, observe respectively again two axial dial gauges with two numerical value of dial gauge radially, when two radially the pointer of dial gauge is not 0, observing gap between steam turbine flange that two axial dial gauges record respectively and assembly flange changes, repeat above-mentioned filling welding, until two radially the pointer of dial gauge be at 0 o'clock, steam turbine flange and assembly flange parallelism and concentricity have reached requirement, the weldering meat of above-mentioned filling welding is polished off, by two welders, be symmetrically welded simultaneously, after being soldered one deck, again observe radially dial gauge of the numerical value of two axial dial gauges and two, repeat above-mentioned steps until the 3rd weld seam is soldered,
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: in step (e), each welding bead, after being cooled to 200 ℃ to 250 ℃, then welds next welding bead;
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: in step (b), when the end by bend pipe is aimed at the lower end of straight tube, reserve the contour projector after the welding of the bend pipe the other end and main line, an end of bend pipe is outwards aimed at the lower end of the straight tube 1/15 straight tube pipe thickness that is staggered;
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: described 4-6 piece backboard is put on the circumferential surface be welded between straight tube and bend pipe equably, has the weld seam groove on the backboard between straight tube and bend pipe;
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: in step (b), when assembly flange is fixed by bolts to the steam turbine flange, observe two radially numerical value of dial gauge, the bolt applied force is regulated, and radially the numerical value of dial gauge is identical to make two; In step (c), when unclamping the bolt be fixed on assembly flange and steam turbine flange, observe equally two radially numerical value of dial gauge, unclamp symmetrically the bolt be fixed on assembly flange and steam turbine flange;
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: in described step (e), the electric arc welding that welding rod that diameter is 2.5mm to 3.2mm and electric current are 90A to 120A is selected in the filling welding of weld seam and cover welding;
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention, wherein: after step (e) completes, destroy backboard.
The method of the unstressed assembling of steam turbine inlet steam pipeline section flange can make the unstressed assembling of steam turbine set inlet steam pipeline section companion flange fast, has shortened the time that unit is driven.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the unstressed assembling of a kind of steam turbine inlet steam pipeline section flange of the present invention;
Fig. 2 is that the 3rd weld seam is the enlarged diagram of straight tube and bend pipe joint, digitized representation welding bead in the drawings.
In Fig. 1 to Fig. 2, label 1 is the steam turbine flange; Label 2 is dial gauge radially; Label 3 is assembly flange; Label 4 is the first weld seam; Label 5 is reducer pipe; Label 6 is the second weld seam; Label 7 is straight tube; Label 8 is the 3rd weld seam; Label 9 is the weld seam groove; Label 10 is backboard; Label 11 is bend pipe; Label 12 is the 4th weld seam; Label 13 is main line; Label 14 is axial dial gauge.
Embodiment
Below by embodiment, the method for the unstressed assembling of a kind of steam turbine inlet steam pipeline section flange of the present invention is further described.
The packet header 60000Nm of Shenhua
3/ h air separation facility, four steam turbine compressor bank, the main steam pressure come from boiler is 9.8MPa, 545 ℃ of design temperatures.The specification of main steam line is φ 377 * 30mm, and pipe material is 12Cr1MoVG; The steam turbine rated speed is 5400 rev/mins, and according to regulation and stipulation, inlet steam pipeline section companion flange parallelism is within 0.15mm, and concentricity is within 0.5mm, and after two flanges break away from, free distance is within 42～44mm.
As shown in Figure 1, the method of the unstressed assembling of steam turbine inlet steam pipeline section flange of the present invention is by assembly flange 3, reducer pipe 5, straight tube 7, bend pipe 11 and main line 13 carry out unstressed assembling with steam turbine flange 1, in assembly process to assembly flange 3, reducer pipe 5, straight tube 7, bend pipe 11 and main line 13 are welded, assembly flange 3 carries out bolt with steam turbine flange 1 and is connected, weld seam comprises: the first weld seam 4 between assembly flange 3 and reducer pipe 5, the second weld seam 6 between reducer pipe 5 and straight tube 7, the 3rd weld seam 8 between straight tube 7 and bend pipe 11, the 4th weld seam 12 between bend pipe 11 and main line 13, its assembly method is as follows:
(a) first that assembly flange 3, reducer pipe 5 and straight tube 7 is integrally welded successively;
(b) assembly flange 3 is fixed by bolts on steam turbine flange 1, straight tube 7 vertically downward, take the lower end of straight tube 7 is benchmark, one end of bend pipe 11 is aimed to the lower end of straight tube 7, reserve the contour projector after bend pipe 11 the other ends and main line 13 weld, be an end of bend pipe 11 outwards and the lower end of straight tube 7 1/15 of straight tube 7 tube walls that are staggered, as 2mm, then the 4th weld seam 12 between bend pipe 11 the other ends and main line 13 is welded; Four dial gauges also are housed on steam turbine flange 1, and south, east is to each axial dial gauge 14, and 0 position, to each dial gauge 2 radially, is transferred to by each dial gauge pointer in north, west; Under original state, two axial dial gauges 14 and two the radially pointer of dial gauge table 2 adjust to 0, when assembly flange 3 is fixed by bolts to steam turbine flange 1, observe respectively the radially numerical value of dial gauge 2 of the numerical value of two axial dial gauges 14 and two, the bolt applied force is regulated, radially the numerical value of dial gauge 2 is at 0 to make two, and the numerical value of axial two axial dial gauges 14 is identical;
(c) end of straight tube 7 and bend pipe 11 links together straight tube 7 and bend pipe 11 with 4-6 piece backboard 10, every 10 of backboard is welded on straight tube 7 and bend pipe 11, backboard 10 is welded on the circumferential surface between straight tube 7 and bend pipe 11 equably, have weld seam groove 9 on the backboard 10 between straight tube 7 and bend pipe 11, then unclamp the bolt be fixed on assembly flange 3 and steam turbine flange 1; Make straight tube 7 be in the free state welding; When unclamping the bolt be fixed on assembly flange 3 and steam turbine flange 1, observe equally the radially numerical value of dial gauge 2 of the numerical value of two axial dial gauges 14 and two, unclamp symmetrically the bolt be fixed on assembly flange 3 and steam turbine flange 1;
(d) in the process of welding the 3rd weld seam 8, adopt argon arc welding to carry out the bottoming welding as shown in label in Fig. 21, by two welders, be symmetrically welded simultaneously;
(e) after bottoming has been welded, observe respectively the radially numerical value of dial gauge 2 of the numerical value of two axial dial gauges 14 on steam turbine flange 1 and two, when two radially the pointer of dial gauge 2 is 0, by two welders, be symmetrically welded simultaneously, when two radially the pointer of dial gauge 2 is not 0, observe the variation in gap between the measured steam turbine flange 1 of two axial dial gauges 14 and assembly flange 3, fill welding in 120 ° of scopes of the 3rd weld seam 8 circumference by a welder facing to place, little orientation, gap between steam turbine flange 1 and assembly flange 3, as in Fig. 2 except label 1, label 13, welding outside 14 and 15, after filling every one deck, observe respectively again two axial dial gauges 14 with two numerical value of dial gauge 2 radially, when two radially the pointer of dial gauge 2 is not 0, observe the variation in gap between the measured steam turbine flange 1 of two axial dial gauges 14 and assembly flange 3, repeat above-mentioned filling welding, until two radially the pointer of dial gauge 2 be 0, steam turbine flange 1 and assembly flange 3 parallelism and concentricity have reached requirement, the weldering meat of above-mentioned filling welding is polished off, by two welders, be symmetrically welded simultaneously, the electric arc welding that welding rod that diameter is 2.5 to 3.2mm and electric current are 90 to 120A is selected in the filling of weld seam welding (being the label 2-12 in Fig. 2) and cover welding (being the label 13-16 in Fig. 2), after being soldered one deck, again observe two axial dial gauges 14 numerical value with two numerical value of dial gauge 2 radially, repeat above-mentioned steps until the 3rd weld seam 8 is soldered.Each welding bead, after being cooled to 200 ℃ to 250 ℃, then welds next welding bead, and the welding bead of each numeral in Fig. 2, after step (e) completes, destroy backboard 10.
As shown in Figure 2, in order to solve the welding bead continuous welding, interpass temperature is high, to the inaccurate problem of the measurement of deviate.The controlling method of interpass temperature: can not continuous welding between welding bead, behind weldering 1 road, weld seam is cold really between 200 ℃～250 ℃, weld again 2 roads, weld again 3 roads after 2 roads are cooling, the like Zhi Dao 16 roads, welding deformation is little like this, but temperature can not be too low, lower than below 200 ℃, not meeting code requirement.
By above method, through repeatedly measuring steam turbine set inlet steam pipeline section flange levelness 0.10mm, concentricity 0.20, unstressed assembling has reached requirement, and No. 3 weld bond completes 8 hours weld intervals, qualified through radiographic inspection 100%.Two flanges are with after bolt tightening, and steam turbine set does not produce any displacement.Finally drive once successful.
Above description is explanation of the invention, is not that limited range of the present invention is referring to claim, in the situation that, without prejudice to spirit of the present invention, the present invention can do the modification of appropriate format to the restriction of invention.
Claims (7)
1. the method for the unstressed assembling of a steam turbine inlet steam pipeline section flange, it is by assembly flange (3), reducer pipe (5), straight tube (7), bend pipe (11) and main line (13) carry out unstressed assembling with steam turbine flange (1), in assembly process to assembly flange (3), reducer pipe (5), straight tube (7), bend pipe (11) and main line (13) are welded, assembly flange (3) carries out bolt with steam turbine flange (1) and is connected, weld seam comprises: the first weld seam (4) between assembly flange (3) and reducer pipe (5), the second weld seam (6) between reducer pipe (5) and straight tube (7), the 3rd weld seam (8) between straight tube (7) and bend pipe (11), the 4th weld seam (12) between bend pipe (11) and main line (13), it is characterized in that:
(a) first that assembly flange (3), reducer pipe (5) and straight tube (7) is integrally welded successively;
(b) radially dial gauge table (2) of two axial dial gauges (14) and two is housed on steam turbine flange (1), two axial dial gauges (14) are separated by 90 ° on the circumference of steam turbine flange (1); Two radially dial gauge table (2) on the circumference of steam turbine flange (1), be separated by 90 °, two axial dial gauges (14) and two the radially pointer of dial gauge table (2) adjust to 0, assembly flange (3) is fixed by bolts on steam turbine flange (1), straight tube (7) vertically downward, take the lower end of straight tube (7) is benchmark, one end of bend pipe (11) is aimed to the lower end of straight tube (7), bend pipe (11) the other end is aimed at main line (13), then the 4th weld seam (12) between bend pipe (11) the other end and main line (13) is welded;
(c) end at straight tube (7) and bend pipe (11) links together straight tube (7) and bend pipe (11) with 4-6 piece backboard (10), every backboard (10) point is welded on straight tube (7) and bend pipe (11), then unclamp the bolt be fixed on assembly flange (3) and steam turbine flange (1), make straight tube (7) be in the free state welding;
(d) in the process of welding the 3rd weld seam (8), adopt argon arc welding to carry out the bottoming welding, by two welders, be symmetrically welded simultaneously;
(e) after bottoming has been welded, observe respectively the radially numerical value of dial gauge (2) of the numerical value of two the axial dial gauges (14) on steam turbine flange (1) and two, when two radially the pointer of dial gauge (2) is 0, by two welders, be symmetrically welded simultaneously, when two radially the pointer of dial gauge (2) is not 0, observe the variation in gap between the measured steam turbine flange (1) of two axial dial gauges (14) and assembly flange (3), fill welding in 120 ° of scopes of the 3rd weld seam (8) circumference by a welder facing to place, little orientation, gap between steam turbine flange (1) and assembly flange (3), after filling every one deck, observe respectively again two axial dial gauges (14) with two numerical value of dial gauge (2) radially, when two radially the pointer of dial gauge (2) is not 0, observing gap between steam turbine flange (1) that two axial dial gauges record respectively and assembly flange (3) changes, repeat above-mentioned filling welding, until two radially the pointer of dial gauge (2) be at 0 o'clock, steam turbine flange (1) and assembly flange (3) parallelism and concentricity have reached requirement, the weldering meat of above-mentioned filling welding is polished off, by two welders, be symmetrically welded simultaneously, after being soldered one deck, again observe radially dial gauge (2) of the numerical value of two axial dial gauges (14) and two, repeat above-mentioned steps until the 3rd weld seam (8) is soldered.
2. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1 is characterized in that: in step (e), each welding bead, after being cooled to 200 ℃ to 250 ℃, then welds next welding bead.
3. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1, it is characterized in that: in step (b), when the end by bend pipe (11) is aimed at the lower end of straight tube (7), reserve the contour projector after the welding of bend pipe (11) the other end and main line (13), an end of bend pipe (11) is outwards aimed at the lower end of straight tube (7) 1/15 straight tube (7) pipe thickness that is staggered.
4. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1, it is characterized in that: described 4-6 piece backboard (10) is welded on the circumferential surface between straight tube (7) and bend pipe (11) equably, on the backboard (10) between straight tube (7) and bend pipe (11), has weld seam groove (9).
5. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1, it is characterized in that: in step (b), when assembly flange (3) is fixed by bolts to steam turbine flange (1), observe respectively the radially numerical value of dial gauge (2) of the numerical value of two axial dial gauges (14) and two, the bolt applied force is regulated, radially the numerical value of dial gauge (2) is at 0 to make two, and the numerical value of axial two axial dial gauges (14) is identical; When unclamping the bolt be fixed on assembly flange (3) and steam turbine flange (1), the same numerical value of observing two axial dial gauges (14) and two are the numerical value of dial gauge (2) radially, unclamps symmetrically the bolt be fixed on assembly flange (3) and steam turbine flange (1).
6. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1, it is characterized in that: in described step (e), the electric arc welding that welding rod that diameter is 2.5mm to 3.2mm and electric current are 90A to 120A is selected in the filling welding of weld seam and cover welding.
7. the method for the unstressed assembling of steam turbine inlet steam pipeline section flange as claimed in claim 1, is characterized in that: after step (e) completes, destroy backboard (10).
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| CN201310390992.9A CN103437834B (en) | 2013-08-30 | 2013-08-30 | Stress-free mounting method of flange at inlet steam pipe section of turbine |
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| CN201310390992.9A CN103437834B (en) | 2013-08-30 | 2013-08-30 | Stress-free mounting method of flange at inlet steam pipe section of turbine |
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Cited By (9)
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| CN104089780A (en) * | 2014-07-03 | 2014-10-08 | 中国航空动力机械研究所 | Air inflow pipe used for model turbine tester and model turbine tester |
| CN107116361A (en) * | 2017-04-25 | 2017-09-01 | 中国化学工程第三建设有限公司 | The pressure testing of Steam Turbine jet chimney entirety, overall Stressless Pipeline Connection construction method |
| CN108050322A (en) * | 2017-12-06 | 2018-05-18 | 中船黄埔文冲船舶有限公司 | A kind of Double-face flange pipe connecting method |
| CN108340089A (en) * | 2017-01-25 | 2018-07-31 | 保罗·博·程 | Form the method and system of pipeline |
| CN109139136A (en) * | 2018-09-25 | 2019-01-04 | 中国船舶重工集团公司第七0三研究所 | A kind of steam turbine astern casing steam inlet pipe fixed structure |
| CN110270773A (en) * | 2019-06-14 | 2019-09-24 | 国家能源投资集团有限责任公司 | The construction method of compressor set Stressless Pipeline Connection |
| CN110332022A (en) * | 2019-06-19 | 2019-10-15 | 大唐陕西发电有限公司 | A kind of turbine high-pressure steam guiding tube replacing options |
| CN110815112A (en) * | 2019-10-29 | 2020-02-21 | 上海宝冶集团有限公司 | Method for installing cold-tightening opening of high-temperature and high-pressure steam pipeline |
| CN113751867A (en) * | 2021-08-09 | 2021-12-07 | 成都凯天电子股份有限公司 | Laser welding processing method for thin-wall revolving body component |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104089780A (en) * | 2014-07-03 | 2014-10-08 | 中国航空动力机械研究所 | Air inflow pipe used for model turbine tester and model turbine tester |
| CN108340089A (en) * | 2017-01-25 | 2018-07-31 | 保罗·博·程 | Form the method and system of pipeline |
| CN107116361A (en) * | 2017-04-25 | 2017-09-01 | 中国化学工程第三建设有限公司 | The pressure testing of Steam Turbine jet chimney entirety, overall Stressless Pipeline Connection construction method |
| CN108050322A (en) * | 2017-12-06 | 2018-05-18 | 中船黄埔文冲船舶有限公司 | A kind of Double-face flange pipe connecting method |
| CN108050322B (en) * | 2017-12-06 | 2019-12-03 | 中船黄埔文冲船舶有限公司 | A kind of Double-face flange pipe connecting method |
| CN109139136A (en) * | 2018-09-25 | 2019-01-04 | 中国船舶重工集团公司第七0三研究所 | A kind of steam turbine astern casing steam inlet pipe fixed structure |
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