CN103317245A - Nuclear power steam generator through tube and anti-seismic strip welding method - Google Patents
Nuclear power steam generator through tube and anti-seismic strip welding method Download PDFInfo
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- CN103317245A CN103317245A CN2013102237286A CN201310223728A CN103317245A CN 103317245 A CN103317245 A CN 103317245A CN 2013102237286 A CN2013102237286 A CN 2013102237286A CN 201310223728 A CN201310223728 A CN 201310223728A CN 103317245 A CN103317245 A CN 103317245A
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Abstract
The invention discloses a nuclear power steam generator through tube and anti-seismic strip welding method. A reference platform is installed at the center of the inside of a secondary side of a steam generator, tube penetration is performed in a method for penetrating tubes and installing anti-seismic strips layer by layer from the middle to the top, meanwhile, positioning expansion and U-shaped tube plate sealing welding are performed layer by layer on a primary side of the steam generator, one half of tube bundles and anti-seismic strips are installed and then one half of tube bundle retaining strips are welded; then the steam generator rotates for 180 degrees, installation of the other half of tube bundles and anti-seismic strips is achieved, and finally installation and welding of the other half of retaining strips and welding of the first half of tube bundles are performed. The nuclear power steam generator through tube and anti-seismic strip welding method can prevent influence on U-shaped heat exchange tubes caused by improper operation or protection, service life of the hest exchange tubes is prolonged, and damage caused by friction between the anti-seismic strips and the tubes can be avoided.
Description
Technical field
The present invention relates to a kind of manufacturing process of nuclear steam generator, particularly, relate to the method for a kind of nuclear steam generator poling and anti-vibration strip welding equipment.
Background technology
In recent years, greatly develop the appearance of nuclear power policy along with country, the manufacturing industry of nuclear power generating equipment has obtained vigorous growth.Nuclear power generating equipment roughly be divided into conventional island equipment and nuclear island equipment two large divisions-, wherein nuclear island equipment is the most important, safe class also is the highest.Nuclear power generating equipment mainly comprises reactor pressure vessel, steam generator and voltage-stablizer etc., wherein the steam generator structure is the most complicated, substantially covered the basic manufacturing technology of nuclear vessel, its manufacture difficulty has the level of suitable representative performance reflection factory nuclear vessel manufacturing capacity in nuclear equipment.In the manufacture process of steam generator poling and anti-vibration strip be installed as one of key technology in its manufacture process, the heat exchanger tube of steam generator is U-shaped pipe, number of tubes many (CPR is 4474, and EPR is 5980), tube outer diameter is:
Mm, the pipe wall thickness is: 1.09 ± 0.1mm.Pipe need to enter into tubesheet holes by some gripper shoes and flow distribution baffle in the poling process, pipe way and also must meet the demands with the relative position of pipe and anti-vibration strip.This just requires will pay special attention in the process of poling, avoids because operation or protect improper meeting to pipe exert an influence (the pipe wall thickness is very thin).To carry out eddy current inspection in the poling and behind the poling and be confirmed whether because of the poling misoperation pipe to be produced damage, if damage is arranged, can not then must carry out the plugging operation by replace tubes if must carry out replace tubes.According to the requirement of RCCM cleannes, whole poling operation must be carried out in clean room.
In order to satisfy above requirement, in the poling process of steam generator, each manufactory often guarantees by utilizing various frocks and optimizing poling technique.Manufacturing experience in the past, poling is up to be worn by the bottom, every layer of pipe way uses every layer of pipe way distance of sticking plaster assurance spaced apart, remove sticking plaster after whole poling finishes anti-vibration strip is tucked into every layer of pipe way, then carry out the welding of maintaining item, there is following shortcoming in this poling technique: (1) is up worn by the bottom, pipe radius little more up radius in bottom is larger, be back taper, so more up wear, the tube bank of bottom minor radius affects the service life of heat exchanger tube because the Action of Gravity Field of upper bundle in the end can produce impression in a gripper shoe place; (2) anti-vibration strip is filled in after all tube banks have been worn between every layer of pipe, and the position of this way anti-vibration strip be difficult for to guarantee, and fill in the process anti-vibration strip can with the pipe friction, all can cause damage to anti-vibration strip and pipe.
Summary of the invention
The purpose of this invention is to provide a kind of poling of the steam generator for nuclear power generating equipment and the installation method of anti-vibration strip; remedy the shortcoming of prior art; improve the technique that poling and anti-vibration strip are installed; avoid because of operating or protecting improper meeting that U-shaped heat exchanger tube is exerted an influence; prolong the service life of heat exchanger tube, and guarantee that the position of anti-vibration strip can not cause damage with the pipe friction.
In order to achieve the above object, the invention provides the method for a kind of nuclear steam generator poling and anti-vibration strip welding equipment, wherein, the method includes the steps of:
Step 1, arrange the poling station: the two ends at steam generator arrange respectively the poling platform, and what wherein be arranged on large end one side of steam generator is the secondary side platform, small end one side be the primary side platform, the bobbin carriage support platform is set on the secondary side platform, places the U-shaped bobbin carriage on the bobbin carriage support platform.
Step 2, carry out poling with reference to the installation of platform and connecting tooling thereof: loading and unloading hanging beam, connecting plate, jockey are installed and with reference to platform support in the steam generator secondary side opening, with reference to the platform handling on the reference platform support, make the secondary side opening central authorities that place steam generator with reference to the upper surface level of platform, with reference to platform locking, remove the loading and unloading hanging beam.Can adjust with locked with reference to platform, finish can be half tube bank after the final adjusting effective support is provided, prevent that pipe from producing impression because of Action of Gravity Field.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, the center superposition of step 1 described U-shaped bobbin carriage center and steam generator, the corresponding pore of U-shaped tube bank to be worn is horizontal in the steam generator.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, step 2 described with reference to platform upper surface and the U-shaped bobbin carriage in ground floor U-shaped to be worn to restrain the outer wall of corresponding pore tangent.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, the described end with reference to platform support of step 2 is connected with connecting plate, and the other end is connected with jockey; This connecting plate is installed in the last piece gripper shoe place of steam generator, and jockey is installed on the helium leak test piece of steam generator bottom.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, described step 3 comprises:
Step 3.1 is installed the poling guide head at the U-shaped tube end that first row is to be worn, and checks the linearity after its installation.
Step 3.2 arranges the tube bank support at the U-shaped bobbin carriage with between with reference to platform, for the U-shaped tube bank provides support.
Step 3.3 is carried out the ground floor poling, then the U-shaped pipe of putting on is carried out the eddy current of whole tube section, confirms the pipe not damaged.
Step 3.4 behind the degree of flushing and the distance between the secondary side U-shaped pipe bend loss of inspection primary side U-shaped pipe pipe end, positions swollen at primary side to the U-shaped pipe.
Step 3.5, at ground floor U-shaped pipe the anti-vibration strip assembly is installed, is used locating clamp plate to determine the relative position of anti-vibration strip and U-shaped pipe during installation, and measure the symmetry about anti-vibration strip is installed, in case of necessity its position is adjusted, then the ground floor anti-vibration strip is fixed in reference on the platform.
Step 3.6, successively repeat identical poling and anti-vibration strip installation steps, use simultaneously the gap of pitch piece and comb type frock control anti-vibration strip and U-shaped pipe in secondary side anti-vibration strip end, and the degree of flushing of the U-shaped tube end of inspection primary side, again in the situation that primary side carries out U-shaped pipe tube sheet sealing weldering in not affecting poling.
Step 3.7 after this half poling and anti-vibration strip installation, is welded the first half tube bank maintaining items, and then the mechanical tensioning device of the first half tube banks is installed, and prevents the movement of pipe and anti-vibration strip.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, the described poling guide head of step 3.1 is removed after finishing U-shaped pipe poling, in order to recycling.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, described poling guide head allows to adopt the tube drawing frock to carry out the tube drawing operation and guide head is dropped at primary side by it.
Namely, poling uses special-purpose poling guide head, the guide head end can be used and surely turn round instrument and tighten according to the screw-down torque of setting, the employing linearity checks that frock checks the linearity after guide head is installed after finishing, can prevent that like this guide head drops in the poling process, if the poling difficulty occurs in the poling process, the guide head structure allows to use the tube drawing frock to carry out the tube drawing operation and can not cause that guide head drops at primary side; Guide head uses after through primary side surely to be turned round instrument and removes, and returns secondary side and reuses, and makes regular check on guide head quantity, guarantees without omitting.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment wherein, in the poling process, can be used the ejector sleeve frock at secondary side, and primary side uses the tube drawing frock and moves back the plumber and put into the auxiliary poling of row.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, described step 3.3 behind eddy current inspection, the eddy current inspection that again the U-shaped pipe that can be detrimental to wound is added.
Above-mentioned nuclear steam generator poling and the method for anti-vibration strip welding equipment, wherein, the described upset fixing tool of step 4 is connected with the first half tube banks by comb type contiguous block, and this upset fixing tool is fixed by the helium leak test piece on the steam generator.
The method of nuclear steam generator poling provided by the invention and anti-vibration strip welding equipment has the following advantages:
1. the present invention is by using poling with reference to platform, set up the reference platform of steam generator poling, improved original poling technique, adopt twice by half mode of half poling again of middle part to top, the pipe of the large radius in bottom and can be top pipe poling with reference to platform good support is provided, guaranteed every layer of pipe stressed evenly; During the second half tube bank polings, half tube bank of having put on provides good support by the upset fixing tool, as the benchmark of the second half tube bank polings.
2. the use by frock, successively poling and installation anti-vibration strip have been realized, effectively avoided the friction (traditional approach for last insert anti-vibration strip) of pipe and anti-vibration strip, this method more is conducive to guarantee the relative position between anti-vibration strip and pipe and anti-vibration strip simultaneously.
3. the secondary side bend loss has guaranteed the gap of pipe and anti-vibration strip by the use of pitch piece and comb type frock, also for pipe provides effective support, has prevented the friction of pipe and anti-vibration strip.
4. the use of mentioned poling guide head among the present invention, can effectively prevent dropping of guide head in the poling process, and in the poling process, can cooperate the tube drawing frock to use if run into the situation of poling difficulty, pipe be extracted (the situation that guide head comes off can not occur).
Description of drawings
Fig. 1 is the poling station layout drawing of the method for nuclear steam generator poling of the present invention and anti-vibration strip welding equipment.
Fig. 2 is reference platform and the relevant connection frock schematic diagram of the method for nuclear steam generator poling of the present invention and anti-vibration strip welding equipment.
Fig. 3 is the reference platform of method of nuclear steam generator poling of the present invention and anti-vibration strip welding equipment and the side schematic view of relevant connection frock.
Fig. 4 is the poling schematic diagram of the method for nuclear steam generator poling of the present invention and anti-vibration strip welding equipment.
Fig. 5 is the upset fixing tool scheme of installation of the method for nuclear steam generator poling of the present invention and anti-vibration strip welding equipment.
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is further described.
As shown in Figure 1, the method of nuclear steam generator poling provided by the invention and anti-vibration strip welding equipment, at first, arrange whole poling station: steam generator 1 is positioned on the turning rolls 14 on the flat car 13, steam generator 1 primary side (small end) is side platform 19 once, secondary side (large end) has secondary side platform 11, for making things convenient for personnel operation, can use bobbin carriage support platform 18 with U-shaped bobbin carriage 12 bed hedgehoppings during poling.Carry out synchronously for realizing that poling and anti-vibration strip are installed, also need to be at the secondary side platform 11 other anti-vibration strip case platforms that arrange.
Carry out poling with reference to the installation of platform 6 and connecting tooling thereof by Fig. 2 and Fig. 3.Steam generator 1 position after adjusting is horizontal so that treat pore corresponding to poling bundle, and 4(is fixing by helium leak test piece 3 at the inner installation loading and unloading of steam generator 1 secondary side hanging beam); Connecting plate 8 is installed in the relevant position of the last piece gripper shoe of steam generator 1; Installing and connecting apparatus 9 is on steam generator 1 bottom helium leak test piece 3; Installation is with reference to platform support 7, and the one end is connected with connecting plate 8, and the other end is connected with jockey 9; Use four hook block ropes 5 with reference to platform 6 handlings on reference platform support 7, guarantee during handling to be in level with reference to platform 6 as far as possible; Use is adjusted reference platform 6 with reference to the adjustment bolt of platform support 7, its upper surface is horizontal, and the plane that it is determined and ground floor are treated the outer wall of the corresponding pore of poling bundle tangent (checking by the poling test), after adjusting is finished, use lock(ing) bolt to lock with reference to platform 6, avoid its displacement; Remove loading and unloading hanging beam 4.
As shown in Figure 4, before poling begins, with U-shaped bobbin carriage 12 handlings on the secondary side platform on 11, and make the center of U-shaped bobbin carriage 12 and the center superposition of steam generator 1, for avoiding the last several array of pipes of every case pipe because of the too low poling that is difficult in position, available bobbin carriage support platform 18 is with U-shaped bobbin carriage 12 bed hedgehoppings; Secondary side platform 11 is provided with to what steam generator 1 extended and stretches out platform 10, regulates it to correct position, is convenient to follow-up poling operation; After preparation finishes, the poling guide head is installed on first row tube end to be worn, use special-purpose deciding to turn round instrument it is tightened, then use linearity to check that frock checks the linearity after guide head is installed, and can prevent effectively that guide head drops in the poling process; At U-shaped bobbin carriage 12 with reference to 6 on platform tube bank support 17 is set according to actual conditions, in the poling process, provides good support for tube bank; Then begin poling, after the ground floor pipe has been worn, all pipes are carried out the eddy current of whole tube section, confirm the pipe not damaged (namely, the poling platform is installed errorless), check that the degree of flushing of primary side pipe end and secondary side bend loss pipe way position swollen apart from rear to the first row pipe.
The anti-vibration strip assembly is installed on the ground floor pipe, is confirmed anti-vibration strip and pipe relative position with locating clamp plate during installation, and measure the symmetry about anti-vibration strip is installed, the rear fixing tool that utilizes is fixed in the ground floor anti-vibration strip with reference on the platform.
Follow-up poling and anti-vibration strip installation process and ground floor pipe are similar, anti-vibration strip and pipe gap will be controlled with the method for pitch piece and the combination of comb type frock in secondary side anti-vibration strip end, and primary side can carry out pipe tube sheet sealing weldering in the situation that do not affect poling; If the poling difficulty occurs in the poling process, but the tube drawing frock is carried out tube drawing (clamping guide head) at primary side, and the structure of guide head guarantees that guide head does not drop in the tube drawing process; Also can problematic pipe be withdrawed from by moving back plumber's dress.
After half tube bank poling and the anti-vibration strip installation; weld the first half tube bank maintaining items; note in the welding process tube bank and anti-vibration strip protection are prevented that welding process from causing electric arc to wound, half tube bank mechanical tensioning device is installed after finishing, prevent the movement of pipe and anti-vibration strip.
As shown in Figure 5, finish the first half tube bank operations after, upset fixing tool 15 is installed, this frock is connected with half tube bank by comb type contiguous block, the fixing tool 15 that overturns is fixed by helium leak test piece 3; Then steam generator 1 rotates 180 °, and the eccentric load because only having half tube bank to produce in the rotation process can prevent that turning rolls 14 from skidding by the mode that turning rolls 14 is transformed and driving is protected.
After finishing rotation, loading and unloading hanging beam 4 is installed again, is removed with reference to platform 6 and auxiliary mould thereof with reference to platform support 7 connecting plate 8 and jockey 9.After steam generator 1 regulates, carry out the poling of the second half tube banks, to the top, overturn this moment fixing tool 15 and the first half tube banks can be the second half and restrain poling good support is provided order by the centre.Poling process and the first half tube banks are similar, and welding the second half tube bank maintaining items and be connected with the first half tube bank maintaining items after finishing are installed the second half tube bank mechanical tensioning devices.
After the operations such as subsequent examination operation, Hydraulic Expansion, tube bank cleaning are finished, weld fixedly snap ring of C type at secondary side, finally finish whole tube bundle assembly operation.
The method of nuclear steam generator poling provided by the invention and anti-vibration strip welding equipment, the reference platform 6 that utilization is installed at steam generator 1 secondary side middle part, adopting successively, (from the middle part to the top) poling carries out poling with the method that anti-vibration strip is installed, meanwhile, primary side can successively position swollen and pipe tube sheet sealing weldering, half tube bank maintaining item of welding after half tube bank and the anti-vibration strip installation; Then, after 180 ° of steam generator rotations, finish the installation of in addition half tube bank and anti-vibration strip, carry out at last the welding equipment of second half maintaining item and the maintaining item welding of restraining with the first half.In said process, used a large amount of frocks to satisfy poling technique and drawing requirement requirement, after actual embodiment the proof its can successfully finish the welding equipment of poling and anti-vibration strip.Realized successively poling and the process program that anti-vibration strip is installed by using with reference to platform 6, for pipe provides good support, the distortion of having avoided pipe to exist; The use of secondary side bend loss pitch piece and comb type frock has guaranteed the spacing of anti-vibration strip and pipe to have prevented the friction of pipe and anti-vibration strip; The situation that guide head comes off so that in the situation that the poling difficulty utilizes the tube drawing frock pipe to be extracted by two ends, do not occur in the use of guide head in whole process.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. the method for a nuclear steam generator poling and anti-vibration strip welding equipment is characterized in that, the method includes the steps of:
Step 1, arrange the poling station: the two ends at steam generator (1) arrange respectively the poling platform, wherein be arranged on steam generator (1) hold greatly a side for secondary side platform (11), small end one side be primary side platform (19), bobbin carriage support platform (18) is set, the upper U-shaped bobbin carriage (12) of placing of bobbin carriage support platform (18) on the secondary side platform (11);
Step 2, carry out poling with reference to the installation of platform (6) and connecting tooling thereof: loading and unloading hanging beam (4), connecting plate (8), jockey (9) are installed and with reference to platform support (7) in steam generator (1) secondary side opening, with reference to platform (6) handling on reference platform support (7), make the secondary side opening central authorities that place steam generator (1) with reference to the upper surface level of platform (6), with reference to platform (6) locking, remove loading and unloading hanging beam (4);
Step 3, take reference platform (6) as supporting, carry out successively poling and installation anti-vibration strip to the top from the secondary side opening middle part of steam generator (1), successively check simultaneously, and successively carry out U-shaped pipe positioning expander and U-shaped pipe tube sheet sealing weldering at the primary side of steam generator, after this half poling and the anti-vibration strip installation, carry out the welding of the first half tube bank maintaining items, the mechanical tensioning device of the first half tube banks is installed at last;
Step 4, at the secondary side of steam generator (1) upset fixing tool (15) is installed, by this upset fixing tool (15) steam generator (1) is rotated 180 °, make half that finish that poling and anti-vibration strip install be positioned at the Lower Half of steam generator (1) opening;
Step 5 is reinstalled loading and unloading hanging beam (4), utilizes it to remove with reference to platform (6) and connecting plate (8), jockey (9) with reference to platform support (7);
Step 6 is successively carried out the second half polings and anti-vibration strip and is installed in steam generator (1), process and step 3 described the first half is identical, and makes the second half tube bank maintaining items and the first half restrain maintaining item to link to each other;
Step 7 is welded fixedly snap ring of C type at secondary side at last.
2. the method for nuclear steam generator poling as claimed in claim 1 and anti-vibration strip welding equipment, it is characterized in that, the center superposition of step 1 described U-shaped bobbin carriage (12) center and steam generator (1), the corresponding pore of U-shaped tube bank to be worn is horizontal in the steam generator (1).
3. the method for nuclear steam generator poling as claimed in claim 1 and anti-vibration strip welding equipment is characterized in that, step 2 described with reference to platform (6) upper surface and U-shaped bobbin carriage (12) in ground floor U-shaped to be worn to restrain the outer wall of corresponding pore tangent.
4. the method for nuclear steam generator poling as claimed in claim 3 and anti-vibration strip welding equipment is characterized in that, the described end with reference to platform support (7) of step 2 is connected with connecting plate (8), and the other end is connected with jockey (9); This connecting plate (8) is installed in the last piece gripper shoe place of steam generator (1), and jockey (9) is installed on the helium leak test piece (3) of steam generator (1) bottom.
5. the method for nuclear steam generator poling as claimed in claim 1 and anti-vibration strip welding equipment is characterized in that, described step 3 comprises:
Step 3.1 is installed the poling guide head at the U-shaped tube end that first row is to be worn, and checks the linearity after its installation;
Step 3.2 arranges tube bank support (17) at U-shaped bobbin carriage (12) with between with reference to platform (6), for the U-shaped tube bank provides support;
Step 3.3 is carried out the ground floor poling, then the U-shaped pipe of putting on is carried out the eddy current of whole tube section, confirms the pipe not damaged;
Step 3.4 behind the degree of flushing and the distance between the secondary side U-shaped pipe bend loss of inspection primary side U-shaped pipe pipe end, positions swollen at primary side to the U-shaped pipe;
Step 3.5 is installed the anti-vibration strip assembly at ground floor U-shaped pipe, uses locating clamp plate to determine the relative position of anti-vibration strip and U-shaped pipe during installation, and measures the symmetry about anti-vibration strip is installed, and then the ground floor anti-vibration strip is fixed in reference on the platform;
Step 3.6, successively repeat identical poling and anti-vibration strip installation steps, use simultaneously the gap of pitch piece and comb type frock control anti-vibration strip and U-shaped pipe in secondary side anti-vibration strip end, and check the degree of flushing of the U-shaped tube end of primary side, carry out U-shaped pipe tube sheet at primary side again and seal weldering;
Step 3.7 after this half poling and anti-vibration strip installation, is welded the first half tube bank maintaining items, and then the mechanical tensioning device of the first half tube banks is installed.
6. the method for nuclear steam generator poling as claimed in claim 5 and anti-vibration strip welding equipment is characterized in that, the described poling guide head of step 3.1 is removed after finishing U-shaped pipe poling, in order to recycling.
7. the method for nuclear steam generator poling as claimed in claim 6 and anti-vibration strip welding equipment is characterized in that, described poling guide head allows to adopt the tube drawing frock to carry out the tube drawing operation and guide head is dropped at primary side by it.
8. the method for nuclear steam generator poling as claimed in claim 7 and anti-vibration strip welding equipment is characterized in that, in the poling process, can use the ejector sleeve frock at secondary side, and primary side uses the tube drawing frock and moves back the plumber and put into the auxiliary poling of row.
9. the method for nuclear steam generator poling as claimed in claim 5 and anti-vibration strip welding equipment is characterized in that, described step 3.3 behind eddy current inspection, the eddy current inspection that again the U-shaped pipe that damage is arranged is added.
10. the method for nuclear steam generator poling as claimed in claim 1 and anti-vibration strip welding equipment, it is characterized in that, the described upset fixing tool of step 4 (15) is connected with the first half tube banks by comb type contiguous block, and this upset fixing tool (15) is fixed by the helium leak test piece (3) on the steam generator (1).
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| CN201310223728.6A CN103317245B (en) | 2013-06-05 | 2013-06-05 | A kind of method of nuclear steam generator poling and anti-vibration strip welding equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434574A (en) * | 2019-07-23 | 2019-11-12 | 淮阴工学院 | Special Chemical Equipments restrain automatic tube-penetrating dedicated unit |
| CN112975268A (en) * | 2021-05-12 | 2021-06-18 | 上海电气核电设备有限公司 | Installation method of anti-seismic strip of steam generator |
| CN114633085A (en) * | 2022-03-15 | 2022-06-17 | 浙江嘉诚动能科技股份有限公司 | Installation method of internal parts of large-sized evaporator for nuclear power |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110434574A (en) * | 2019-07-23 | 2019-11-12 | 淮阴工学院 | Special Chemical Equipments restrain automatic tube-penetrating dedicated unit |
| CN112975268A (en) * | 2021-05-12 | 2021-06-18 | 上海电气核电设备有限公司 | Installation method of anti-seismic strip of steam generator |
| CN114633085A (en) * | 2022-03-15 | 2022-06-17 | 浙江嘉诚动能科技股份有限公司 | Installation method of internal parts of large-sized evaporator for nuclear power |
| CN114633085B (en) * | 2022-03-15 | 2024-01-30 | 浙江嘉诚动能科技股份有限公司 | Method for mounting internal parts of large-sized evaporator for nuclear power |
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