CN103971767B - 1000000 grades of nuclear power generating sets main steam system balanced load installation methods - Google Patents
1000000 grades of nuclear power generating sets main steam system balanced load installation methods Download PDFInfo
- Publication number
- CN103971767B CN103971767B CN201410193984.XA CN201410193984A CN103971767B CN 103971767 B CN103971767 B CN 103971767B CN 201410193984 A CN201410193984 A CN 201410193984A CN 103971767 B CN103971767 B CN 103971767B
- Authority
- CN
- China
- Prior art keywords
- stop valve
- inlet throttle
- main inlet
- support spring
- described support
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a kind of 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods, comprise the steps: main inlet throttle-stop valve is installed; Main inlet throttle-stop valve support spring is installed; First time adjusts described support spring; Installation high-voltage steam guiding tube; Second time adjusts support spring; Main steam line is installed; Third time adjusts support spring; Main inlet throttle-stop valve damper is installed; The present invention is in the process of installing, limit mounting edge regulates, and makes the weight of each parts fall on support spring, by the stress successive elimination produced in welding process, avoid main steam line mount stress to impact main inlet throttle-stop valve, improve the installation quality of main steam system pipeline.
Description
Technical field
The present invention relates to technical field of nuclear power, particularly relate to a kind of installation method of nuclear power generating sets main steam system.
Background technology
Along with the dilatation of nuclear power station unit capacity, the design parameter of the therrmodynamic system pipelines such as main steam improves further, and the impact of pipe stress on equipment constantly rises.For ensureing the safe and stable operation of equipment, the mount stress effectively controlling main steam system is most important.The stress that main steam horizontal segment pipeline produces due to welding deformation in installation process is if eliminate not in time, by forcing the weight of pipeline to be directly delivered on steam turbine, larger to unit operation security implication.Main inlet throttle-stop valve valve body by spring supporting, if can not the stressed load of mean allocation support spring in installation process, will force pipe stress to connect cylinder.How to control main steam line mount stress in installation process, how reasonable distribution main inlet throttle-stop valve support spring load, to reach the object of the installation quality improving main steam system pipeline, these are all the technical barriers existed in prior art.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods can eliminating in pipe installation process the stress welding generation.
For solving the problems of the technologies described above, technical scheme of the present invention is: 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods, comprise the steps:
Step one, installs main inlet throttle-stop valve, and coordinate chain block that main inlet throttle-stop valve lifting is placed into main inlet throttle-stop valve steel platform with driving, carry out levelling capturing, and install interim parallels additional at main inlet throttle-stop valve damper position, adjustment main inlet throttle-stop valve is to requiring absolute altitude;
Step 2, main inlet throttle-stop valve support spring is installed, repetition measurement main inlet throttle-stop valve position levelling capturing, use channel-section steel at main inlet throttle-stop valve damper position welding damper support steel beam, avoid main inlet throttle-stop valve to be moved, use driving to coordinate chain block, by support spring lifting to main inlet throttle-stop valve, measure the verticality of described support spring, adjust described support spring, make described support spring bear main inlet throttle-stop valve weight;
Step 3, first time adjusts described support spring, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve weight and the rear weight of main inlet throttle-stop valve insulation, pull down interim parallels, main inlet throttle-stop valve weight is put on described support spring, adjusts described support spring, and make described support spring scale be adjusted to described support spring calculating stress load, after having adjusted, install interim parallels additional at main inlet throttle-stop valve damper position;
Step 4, installation high-voltage steam guiding tube, after the acceptance(check) of main inlet throttle-stop valve discharge flange, measure the size between described main inlet throttle-stop valve discharge flange mouth and high pressure cylinder interface, excision pipeline surplus, polishing groove, and pipe interior is cleared up, first the highpressure steam conduit tube adjusting the outlet of bottom main inlet throttle-stop valve puts in place and welds, then the highpressure steam conduit tube adjusting top high pressure cylinder interface put in place after weld.
Step 5, second time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness, use spring balance to coordinate chain block simulation main inlet throttle-stop valve and the rear weight of highpressure steam conduit tube weight, main inlet throttle-stop valve and highpressure steam conduit tube insulation, pull down interim parallels, make main inlet throttle-stop valve weight put on described support spring, the scale of support spring is also adjusted to support spring calculating stress load by adjustment support spring, installs the interim parallels of main inlet throttle-stop valve damper position additional;
Step 6, installs main steam line, described main steam line hangs chain block, adjusts each pipeline section installation site of described main steam line, the polishing mouth of pipe; Place range at installation pipeline section free end chain block place and should be greater than the spring balance installing pipeline section weight, after Correctional tube fragment position, butt welding mouth spot welding is fixed, the initial value of record spring balance; Then successively butt welding mouth carry out welding, thermal treatment and Non-Destructive Testing, by chain block adjustment spring balance numerical value, spring balance numerical value is returned to pipeline section counterpart complete after the initial value of record, and record pipeline section weld bond place and free end absolute altitude respectively;
After each pipeline section installation, install formal suspension and support, progressively unload the pulling force of chain block on each pipeline section, adjustment suspension and support makes pipeline section return to designed elevation, and suspension and support is in the lock state, and removes spring balance after the suspension and support installation on each pipeline section;
Step 7, third time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness; After using spring balance to coordinate chain block simulation main inlet throttle-stop valve, highpressure steam conduit tube, main steam line installation, weight and main inlet throttle-stop valve, highpressure steam conduit tube, main steam line are incubated rear weight; Pull down interim parallels, make main inlet throttle-stop valve weight put on described support spring; The scale of support spring is also adjusted to support spring calculating stress load by adjustment support spring;
Step 8, main inlet throttle-stop valve damper is installed, after the interim parallels of main inlet throttle-stop valve damper installation site is pulled down, according to the position of main inlet throttle-stop valve damper mounting hole, according to the requirement in precompile amount (X/Z direction), damper support steel beam carries out unwrapping wire, and unwrapping wire accuracy requirement controls, within ± 2.5mm, to determine the installation site of lower steel plate;
Adjust the installing space of main inlet throttle-stop valve damper, according to unwrapping wire position, the adjustment backing plate of main inlet throttle-stop valve damper and lower steel plate and damper support steel beam are carried out spot welding and fixes; Main inlet throttle-stop valve damper is put on lower steel plate, to good mounting hole, with bolt, main inlet throttle-stop valve damper housing and lower steel plate is fixed;
Wrap main inlet throttle-stop valve damper cylindrical shell with heat tape, switch on power, the damping agent of main inlet throttle-stop valve damper cylindrical shell surrounding is softened, unclamps main inlet throttle-stop valve damper transport support; Mobile main inlet throttle-stop valve damper top plunger also adds thermal insulation board, and fix the mounting hole on main inlet throttle-stop valve damper top and the mounting hole of main inlet throttle-stop valve with bolt, finally turn off the power supply of heat tape, damping agent slowly solidifies; Tighten main inlet throttle-stop valve damper bolt, the installation of main inlet throttle-stop valve damper.
As the preferred technical scheme of one, in described step 2, line pendant is used to measure the verticality of described support spring.
As the preferred technical scheme of one, in described step 3, first time is when adjusting described support spring, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve weight and the rear weight of main inlet throttle-stop valve insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, jack-up main inlet throttle-stop valve, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on described support spring, adjust the jackscrew bolt bottom described support spring, discharge the stop nut on described support spring, observe the change of described support spring scale and main inlet throttle-stop valve absolute altitude, levelness changes, continue the jackscrew bolt bottom the described support spring of adjustment, described support spring scale is adjusted to described support spring and calculates stress load, after having adjusted, interim parallels is installed additional at main inlet throttle-stop valve damper position.
As the preferred technical scheme of one, in described step 4, main inlet throttle-stop valve discharge flange is checked and accepted and is comprised the steps: the lifting of main inlet throttle-stop valve discharge flange to put in place, red lead powder is smeared also just tight at flange faying face, then flange is pulled down, check faying face contact situation, edge of a knife chi is used to check, guarantee that the maximum gap of contact point is less than 0.03mm, flange bolt internal cleaning is totally measured flange bolt original length afterwards, and record, mounting flange, by flange nut pretension, flange bolt is made to extend 0.05mm; With electrically heated rod, flange bolt is heated, carry out heat tightly according to drawing requirement, after flange bolt cooling, measure flange bolt length, and record, measure flange bolt elongate amount within the scope of 0.4mm ~ 0.45mm.
As the preferred technical scheme of one, in described step 5, during second time adjustment support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve and highpressure steam conduit tube weight, main inlet throttle-stop valve and the rear weight of highpressure steam conduit tube insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on described support spring, adjust the jackscrew bolt bottom described support spring, described support spring scale generation respective change, discharge the stop nut on described support spring, observe the change of described support spring scale, continue the jackscrew bolt bottom the described support spring of adjustment, the scale of described support spring is adjusted to described support spring and calculates stress load, adjust the stop nut of the described support spring of rear locking, install the interim parallels of main inlet throttle-stop valve damper position additional.
As the preferred technical scheme of one, in described step 5, when main steam line is installed, adopts balanced load method that straight length is installed, use two chain blocks, respectively hang a chain block at the free end and welding end installing pipeline section; Balanced load method installs bend loss, uses three chain blocks, and chain block hangs on the free end and elbow center of installing bend loss respectively, after chain block has hung, adjusts bend loss to installation site, the polishing mouth of pipe;
After chain block has hung, placing range at installation pipeline section free end chain block place should slightly larger than the spring balance installing pipeline section weight, and after Correctional tube fragment position, butt welding mouth spot welding is fixed, the initial value of record spring balance; Then successively butt welding mouth carry out welding, thermal treatment and Non-Destructive Testing, in welding process, weld bond symmetrical welding, and observe the variable quantity installing the spring balance indicated value that pipeline section causes due to welding deformation, after weld bond welding, thermal treatment and Non-Destructive Testing complete, observe the change of spring balance numerical value, by chain block adjustment spring balance numerical value, the numerical value change amount of spring balance is made to control within ± 0.2kN scope, spring balance numerical value is returned to pipeline section counterpart complete after the initial value of record, and record pipeline section weld bond place and free end absolute altitude respectively;
After each pipeline section installation, install formal suspension and support, progressively unload the pulling force of chain block on each pipeline section, adjustment suspension and support makes pipeline section return to designed elevation, and suspension and support is in the lock state, and removes spring balance after the suspension and support installation on each pipeline section.
As the preferred technical scheme of one, in described step 7, during third time adjustment support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness; After using spring balance to coordinate chain block simulation main inlet throttle-stop valve, highpressure steam conduit tube, main steam line installation, weight and main inlet throttle-stop valve, highpressure steam conduit tube, main steam line are incubated rear weight; Hydraulic jack is positioned over main inlet throttle-stop valve damper position, pulls down interim parallels, release lifting jack, makes main inlet throttle-stop valve weight put on described support spring; Discharge the jackscrew bolt bottom described support spring, described support spring scale generation respective change; Discharge the stop nut on described support spring, observe the change of described support spring scale; Continue the jackscrew bolt bottom the described support spring of adjustment, described support spring scale is adjusted to described support spring and calculates stress load.
As the preferred technical scheme of one, in described step 8, when main inlet throttle-stop valve damper is installed, after interim parallels is pulled down, according to the position of main inlet throttle-stop valve damper mounting hole on main inlet throttle-stop valve, require to carry out unwrapping wire on damper support steel beam according to precompile amount (X/Z direction), unwrapping wire accuracy requirement controls, within ± 2.5mm, to determine the installation site of lower steel plate;
Measure the height of main inlet throttle-stop valve damper installing space and make a record, the requirement for height of installing space is between 455mm ~ 465mm, if the height of installing space exceedes the scope of requirement, needs the adjustment backing plate adjusting main inlet throttle-stop valve damper; According to unwrapping wire position, adjustment backing plate and lower steel plate and damper support steel beam are carried out spot welding and fixes; Main inlet throttle-stop valve damper is put on lower steel plate, to good mounting hole, with bolt, main inlet throttle-stop valve damper housing and lower steel plate is fixed;
Wrap main inlet throttle-stop valve damper cylindrical shell with heat tape, switch on power, adjustment heat tape temperature adjustment knob, heating-up temperature is the highest is no more than 150 ° in setting, when the damping agent of main inlet throttle-stop valve damper cylindrical shell surrounding starts to soften, unclamps main inlet throttle-stop valve damper transport support; Mobile main inlet throttle-stop valve damper top plunger also adds thermal insulation board, and bolt fixes the mounting hole on main inlet throttle-stop valve damper top and the mounting hole of main inlet throttle-stop valve, and finally turn off the power supply of heating tape, damping agent slowly solidifies; Tighten main inlet throttle-stop valve damper bolt, the installation of main inlet throttle-stop valve damper.
As the preferred technical scheme of one, after the installation of main inlet throttle-stop valve damper, check alloy steel pipeline spectrum check mark, during without mark, should spectral test be re-started, and record; Spectrum has checked rear cooperation high pressure cylinder load distribution.
Owing to have employed technique scheme, 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods, comprise the steps: to install main inlet throttle-stop valve; Main inlet throttle-stop valve support spring is installed; First time adjusts described support spring; Installation high-voltage steam guiding tube; Second time adjusts support spring; Main steam line is installed; Third time adjusts support spring; Main inlet throttle-stop valve damper is installed; The present invention is in the process of installing, limit mounting edge regulates, and makes the weight of each parts fall on support spring, by the stress successive elimination produced in welding process, avoid main steam line mount stress to impact main inlet throttle-stop valve, improve the installation quality of main steam system pipeline.
Accompanying drawing explanation
The following drawings is only intended to schematically illustrate the present invention and explain, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the chain block fixed installation straight length of the embodiment of the present invention;
Fig. 2 is the chain block fixed installation bend loss structure principle chart of the embodiment of the present invention;
Fig. 3 is that the chain block of the embodiment of the present invention fixedly mounts straight length and installs the structural representation of spring balance additional;
Fig. 4 is that the chain block of the embodiment of the present invention fixedly mounts bend loss and installs the structural representation of spring balance additional;
In figure: 1-installs pipeline section; 2-installs pipeline section.
Embodiment
Below in conjunction with drawings and Examples, set forth the present invention further.In the following detailed description, the mode only by illustrating describes some one exemplary embodiment of the present invention.Undoubtedly, those of ordinary skill in the art can recognize, when without departing from the spirit and scope of the present invention, can revise by various different mode to described embodiment.Therefore, accompanying drawing is illustrative with being described in essence, instead of for limiting the protection domain of claim.
1000000 grades of nuclear power generating sets main steam system balanced load installation methods, is characterized in that, comprise the steps:
Step one, installs main inlet throttle-stop valve, and after the installation of main inlet throttle-stop valve steel platform pre-assembled, coordinate chain block main inlet throttle-stop valve lifting to be in place with driving, carry out levelling capturing, and install interim parallels additional at main inlet throttle-stop valve damper position, adjustment main inlet throttle-stop valve is to requiring absolute altitude;
Step 2, main inlet throttle-stop valve support spring is installed, repetition measurement main inlet throttle-stop valve position levelling capturing, use channel-section steel at main inlet throttle-stop valve damper position welding damper support steel beam, avoid main inlet throttle-stop valve to be moved, driving is used to coordinate chain block, by support spring lifting to main inlet throttle-stop valve, use line pendant, measure support spring verticality, adjustment support spring, makes support spring bear main inlet throttle-stop valve weight;
Step 3, first time adjusts support spring, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve weight and the rear weight of main inlet throttle-stop valve insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, jack-up main inlet throttle-stop valve, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on support spring, jackscrew bolt bottom adjustment support spring, support spring scale generation respective change, stop nut on release support spring, observe the change of support spring scale and main inlet throttle-stop valve absolute altitude, levelness changes, continue the jackscrew bolt bottom adjustment support spring, support spring scale is adjusted to spring and calculates stress load, after having adjusted, interim parallels is installed additional at main inlet throttle-stop valve damper position,
Step 4, installation high-voltage steam guiding tube, puts in place the lifting of main inlet throttle-stop valve discharge flange, red lead powder is smeared also just tight at flange faying face, then pull down flange, check faying face contact situation, use edge of a knife chi to check, guarantee that the maximum gap of contact point is less than 0.03mm, flange bolt internal cleaning is totally measured flange bolt original length afterwards, and record, mounting flange, by flange nut pretension, flange bolt is made to extend 0.05mm;
With electrically heated rod, flange bolt is heated, heat is carried out tightly according to drawing requirement, flange bolt length is measured after flange bolt cooling, and record, measure flange bolt elongate amount within the scope of 0.4mm ~ 0.45mm, main inlet throttle-stop valve discharge flange acceptance(check) laggard horizontal high voltage steam guiding tube road is installed, size between pre-test flange port and high pressure cylinder interface is installed, excision pipeline surplus, polishing groove, and pipe interior is cleared up, first the highpressure steam conduit tube of bottom main inlet throttle-stop valve outlet is installed, the highpressure steam conduit tube of top high pressure cylinder interface is installed again, weld after pipeline being adjusted to the right place during installation.
Step 5, second time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve and highpressure steam conduit tube weight, main inlet throttle-stop valve and the rear weight of highpressure steam conduit tube insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on support spring, jackscrew bolt bottom adjustment support spring, support spring scale generation respective change, stop nut on release support spring, observe the change of spring scale, continue the jackscrew bolt of adjustment bottom, spring scale is adjusted to spring and calculates stress load, adjust rear locking stop nut, install the interim parallels of main inlet throttle-stop valve damper position additional,
Step 6, installs main steam line, adopts balanced load method to install straight length, as shown in Figure 1, uses two chain blocks, respectively hangs a chain block at the free end and welding end (Ban meter Chu) installing pipeline section 1; Balanced load method installs bend loss, as shown in Figure 2, use three chain blocks, chain block hangs on the free end and elbow center of installing pipeline section 1 respectively, after chain block has hung, adjustment installs pipeline section 1 to installation site, and the position of installation pipeline section 1 is coordinated with the position of installing pipeline section 2, the polishing mouth of pipe;
After chain block has hung, as shown in Figure 3, in installation, spring balance W1 is placed at pipeline section 1 free end chain block place, spring balance range should slightly larger than installation pipeline section 1 weight, pipeline section 1 position is installed in adjustment makes it coordinate with the position of installing pipeline section 2, then butt welding mouth spot welding is fixed, the initial value of record spring balance; When installation pipeline section 1 is bend pipe, as shown in Figure 4, spring balance W2 and W3 is all placed at the installation free end of pipeline section 1 and the chain block place at elbow center.
After spring balance initial value record completes, butt welding mouth welds successively, thermal treatment and Non-Destructive Testing, in welding process, weld bond symmetrical welding, and observe the variable quantity installing the spring balance indicated value that pipeline section 1 causes due to welding deformation, weld bond welds, after thermal treatment and Non-Destructive Testing complete, observe the change of spring balance numerical value, by chain block adjustment spring balance numerical value, the numerical value change amount of spring balance is made to control within ± 0.2kN scope, spring balance numerical value is returned to pipeline section counterpart complete after the initial value of record, and record pipeline section weld bond place and free end absolute altitude respectively,
After each pipeline section installation, install formal suspension and support, progressively unload the pulling force of chain block on each pipeline section, adjustment suspension and support makes pipeline section return to designed elevation, and suspension and support is in the lock state, remove spring balance and unnecessary temporary fastening device after the suspension and support installation on each pipeline section;
Step 7, third time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness; After using spring balance to coordinate chain block simulation main inlet throttle-stop valve, highpressure steam conduit tube, main steam line installation, weight and main inlet throttle-stop valve, highpressure steam conduit tube, main steam line are incubated rear weight; Hydraulic jack is positioned over main inlet throttle-stop valve damper position, pulls down interim parallels, release lifting jack, makes main inlet throttle-stop valve weight put on support spring; Jackscrew bolt bottom release support spring, support spring scale generation respective change; Stop nut on release support spring, observes the change of support spring scale; Continue the jackscrew bolt bottom adjustment support spring, support spring scale is adjusted to support spring and calculates stress load;
Step 8, main inlet throttle-stop valve damper is installed, after the interim parallels of main inlet throttle-stop valve damper position is pulled down, according to the position of main inlet throttle-stop valve damper mounting hole on main inlet throttle-stop valve, require to carry out unwrapping wire on damper support steel beam according to precompile amount (X/Z direction), unwrapping wire accuracy requirement controls, within ± 2.5mm, to determine the installation site of lower steel plate;
Measure the height of main inlet throttle-stop valve damper installing space and make a record, the requirement for height (setting height(from bottom) of main inlet throttle-stop valve damper is between 395mm ~ 405mm) between 455mm ~ 465mm of installing space, if the height of installing space exceedes the scope of requirement, adjustment backing plate is needed to adjust; According to unwrapping wire position, adjustment backing plate and lower steel plate and girder steel are carried out spot welding and fixes; Main inlet throttle-stop valve damper is put on lower steel plate, to good mounting hole, with bolt, main inlet throttle-stop valve damper housing and lower steel plate is fixed;
Main inlet throttle-stop valve damper cylindrical shell is wrapped with heat tape, switch on power, adjustment heat tape temperature adjustment knob, setting heating-up temperature (the highest be no more than 150 °), when the damping agent of main inlet throttle-stop valve damper cylindrical shell surrounding starts to soften, unclamp main inlet throttle-stop valve damper transport support; Mobile main inlet throttle-stop valve damper top plunger also adds thermal insulation board, and bolt fixes the mounting hole on main inlet throttle-stop valve damper top and the mounting hole of main inlet throttle-stop valve, and finally turn off the power supply of heating tape, damping agent slowly solidifies; Tighten main inlet throttle-stop valve damper bolt, the installation of main inlet throttle-stop valve damper.
After all process steps has been constructed, check alloy steel pipeline spectrum check mark, during without mark, should spectral test be re-started, and record; Spectrum has checked rear cooperation high pressure cylinder load distribution.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Claims (9)
1. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods, is characterized in that, comprise the steps:
Step one, installs main inlet throttle-stop valve, and coordinate chain block that main inlet throttle-stop valve lifting is placed into main inlet throttle-stop valve steel platform with driving, carry out levelling capturing, and install interim parallels additional at main inlet throttle-stop valve damper position, adjustment main inlet throttle-stop valve is to requiring absolute altitude;
Step 2, main inlet throttle-stop valve support spring is installed, repetition measurement main inlet throttle-stop valve position levelling capturing, use channel-section steel at main inlet throttle-stop valve damper position welding damper support steel beam, avoid main inlet throttle-stop valve to be moved, use driving to coordinate chain block, by support spring lifting to main inlet throttle-stop valve, measure the verticality of described support spring, adjust described support spring, make described support spring bear main inlet throttle-stop valve weight;
Step 3, first time adjusts described support spring, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve weight and the rear weight of main inlet throttle-stop valve insulation, pull down interim parallels, main inlet throttle-stop valve weight is put on described support spring, adjusts described support spring, and make described support spring scale be adjusted to described support spring calculating stress load, after having adjusted, install interim parallels additional at main inlet throttle-stop valve damper position;
Step 4, installation high-voltage steam guiding tube, after the acceptance(check) of main inlet throttle-stop valve discharge flange, measure the size between described main inlet throttle-stop valve discharge flange mouth and high pressure cylinder interface, excision pipeline surplus, polishing groove, and pipe interior is cleared up, first the highpressure steam conduit tube adjusting the outlet of bottom main inlet throttle-stop valve puts in place and welds, then the highpressure steam conduit tube adjusting top high pressure cylinder interface put in place after weld;
Step 5, second time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness, use spring balance to coordinate chain block simulation main inlet throttle-stop valve and the rear weight of highpressure steam conduit tube weight, main inlet throttle-stop valve and highpressure steam conduit tube insulation, pull down interim parallels, make main inlet throttle-stop valve weight put on described support spring, the scale of support spring is also adjusted to calculating stress load by adjustment support spring, installs the interim parallels of main inlet throttle-stop valve damper position additional;
Step 6, installs main steam line, described main steam line hangs chain block, adjusts each pipeline section installation site of described main steam line, the polishing mouth of pipe; Place range at installation pipeline section free end chain block place and should be greater than the spring balance installing pipeline section weight, after Correctional tube fragment position, butt welding mouth spot welding is fixed, the initial value of record spring balance; Then successively butt welding mouth carry out welding, thermal treatment and Non-Destructive Testing, by chain block adjustment spring balance numerical value, spring balance numerical value is returned to pipeline section counterpart complete after the initial value of record, and record pipeline section weld bond place and free end absolute altitude respectively;
After each pipeline section installation, install formal suspension and support, progressively unload the pulling force of chain block on each pipeline section, adjustment suspension and support makes pipeline section return to designed elevation, and suspension and support is in the lock state, and removes spring balance after the suspension and support installation on each pipeline section;
Step 7, third time adjusts support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness; After using spring balance to coordinate chain block simulation main inlet throttle-stop valve, highpressure steam conduit tube, main steam line installation, weight and main inlet throttle-stop valve, highpressure steam conduit tube, main steam line are incubated rear weight; Pull down interim parallels, make main inlet throttle-stop valve weight put on described support spring; Adjust described support spring and the scale of described support spring is adjusted to described support spring and calculate stress load;
Step 8, main inlet throttle-stop valve damper is installed, after the interim parallels of main inlet throttle-stop valve damper installation site is pulled down, according to the position of main inlet throttle-stop valve damper mounting hole, according to the requirement of precompile amount, damper support steel beam carries out unwrapping wire, and unwrapping wire accuracy requirement controls, within ± 2.5mm, to determine the installation site of lower steel plate;
Adjust the installing space of main inlet throttle-stop valve damper, according to unwrapping wire position, the adjustment backing plate of main inlet throttle-stop valve damper and lower steel plate and damper support steel beam are carried out spot welding and fixes; Main inlet throttle-stop valve damper is put on lower steel plate, to good mounting hole, with bolt, main inlet throttle-stop valve damper housing and lower steel plate is fixed;
Wrap main inlet throttle-stop valve damper cylindrical shell with heat tape, switch on power, the damping agent of main inlet throttle-stop valve damper cylindrical shell surrounding is softened, unclamps main inlet throttle-stop valve damper transport support; Mobile main inlet throttle-stop valve damper top plunger also adds thermal insulation board, and fix the mounting hole on main inlet throttle-stop valve damper top and the mounting hole of main inlet throttle-stop valve with bolt, finally turn off the power supply of heat tape, damping agent slowly solidifies; Tighten main inlet throttle-stop valve damper bolt, the installation of main inlet throttle-stop valve damper.
2. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, is characterized in that, in described step 2, use line pendant to measure the verticality of described support spring.
3. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, it is characterized in that, in described step 3, first time is when adjusting described support spring, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve weight and the rear weight of main inlet throttle-stop valve insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, jack-up main inlet throttle-stop valve, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on described support spring, adjust the jackscrew bolt bottom described support spring, discharge the stop nut on described support spring, observe the change of described support spring scale and main inlet throttle-stop valve absolute altitude, levelness changes, continue the jackscrew bolt bottom the described support spring of adjustment, described support spring scale is adjusted to described support spring and calculates stress load, after having adjusted, interim parallels is installed additional at main inlet throttle-stop valve damper position.
4. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, it is characterized in that, in described step 4, main inlet throttle-stop valve discharge flange is checked and accepted and is comprised the steps: the lifting of main inlet throttle-stop valve discharge flange to put in place, red lead powder is smeared also just tight at flange faying face, then flange is pulled down, check faying face contact situation, edge of a knife chi is used to check, guarantee that the maximum gap of contact point is less than 0.03mm, flange bolt internal cleaning is totally measured flange bolt original length afterwards, and record, mounting flange, by flange nut pretension, flange bolt is made to extend 0.05mm, with electrically heated rod, flange bolt is heated, carry out heat tightly according to drawing requirement, after flange bolt cooling, measure flange bolt length, and record, measure flange bolt elongate amount within the scope of 0.4mm ~ 0.45mm.
5. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, it is characterized in that, in described step 5, during second time adjustment support spring, repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness, spring balance is used to coordinate chain block simulation main inlet throttle-stop valve and highpressure steam conduit tube weight, main inlet throttle-stop valve and the rear weight of highpressure steam conduit tube insulation, hydraulic jack is positioned over main inlet throttle-stop valve damper position, pull down interim parallels, release lifting jack, main inlet throttle-stop valve weight is made to put on described support spring, adjust the jackscrew bolt bottom described support spring, described support spring scale generation respective change, discharge the stop nut on described support spring, observe the change of described support spring scale, continue the jackscrew bolt bottom the described support spring of adjustment, the scale of described support spring is adjusted to described support spring and calculates stress load, adjust the stop nut of the described support spring of rear locking, install the interim parallels of main inlet throttle-stop valve damper position additional.
6. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, it is characterized in that, in described step 5, when main steam line is installed, adopt balanced load method that straight length is installed, use two chain blocks, respectively hang a chain block at the free end and welding end installing pipeline section; Balanced load method installs bend loss, uses three chain blocks, and chain block hangs on the free end and elbow center of installing bend loss respectively, after chain block has hung, adjusts bend loss to installation site, the polishing mouth of pipe;
After chain block has hung, placing range at installation pipeline section free end chain block place should slightly larger than the spring balance installing pipeline section weight, and after Correctional tube fragment position, butt welding mouth spot welding is fixed, the initial value of record spring balance; Then successively butt welding mouth carry out welding, thermal treatment and Non-Destructive Testing, in welding process, weld bond symmetrical welding, and observe the variable quantity installing the spring balance indicated value that pipeline section causes due to welding deformation, after weld bond welding, thermal treatment and Non-Destructive Testing complete, observe the change of spring balance numerical value, by chain block adjustment spring balance numerical value, the numerical value change amount of spring balance is made to control within ± 0.2kN scope, spring balance numerical value is returned to pipeline section counterpart complete after the initial value of record, and record pipeline section weld bond place and free end absolute altitude respectively;
After each pipeline section installation, install formal suspension and support, progressively unload the pulling force of chain block on each pipeline section, adjustment suspension and support makes pipeline section return to designed elevation, and suspension and support is in the lock state, and removes spring balance after the suspension and support installation on each pipeline section.
7. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, is characterized in that, in described step 7, during third time adjustment support spring, and repetition measurement main inlet throttle-stop valve absolute altitude, adjustment levelness; After using spring balance to coordinate chain block simulation main inlet throttle-stop valve, highpressure steam conduit tube, main steam line installation, weight and main inlet throttle-stop valve, highpressure steam conduit tube, main steam line are incubated rear weight; Hydraulic jack is positioned over main inlet throttle-stop valve damper position, pulls down interim parallels, release lifting jack, makes main inlet throttle-stop valve weight put on described support spring; Discharge the jackscrew bolt bottom described support spring, described support spring scale generation respective change; Discharge the stop nut on described support spring, observe the change of described support spring scale; Continue the jackscrew bolt bottom the described support spring of adjustment, described support spring scale is adjusted to described support spring and calculates stress load.
8. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as described in claim 1,2 or 3, it is characterized in that, in described step 8, when main inlet throttle-stop valve damper is installed, after interim parallels is pulled down, according to the position of main inlet throttle-stop valve damper mounting hole on main inlet throttle-stop valve, require to carry out unwrapping wire on damper support steel beam according to precompile amount, unwrapping wire accuracy requirement controls, within ± 2.5mm, to determine the installation site of lower steel plate;
Measure the height of main inlet throttle-stop valve damper installing space and make a record, the requirement for height of installing space is between 455mm ~ 465mm, if the height of installing space exceedes the scope of requirement, needs the adjustment backing plate adjusting main inlet throttle-stop valve damper; According to unwrapping wire position, adjustment backing plate and lower steel plate and damper support steel beam are carried out spot welding and fixes; Main inlet throttle-stop valve damper is put on lower steel plate, to good mounting hole, with bolt, main inlet throttle-stop valve damper housing and lower steel plate is fixed;
Wrap main inlet throttle-stop valve damper cylindrical shell with heat tape, switch on power, adjustment heat tape temperature adjustment knob, heating-up temperature is the highest is no more than 150 ° in setting, when the damping agent of main inlet throttle-stop valve damper cylindrical shell surrounding starts to soften, unclamps main inlet throttle-stop valve damper transport support; Mobile main inlet throttle-stop valve damper top plunger also adds thermal insulation board, and bolt fixes the mounting hole on main inlet throttle-stop valve damper top and the mounting hole of main inlet throttle-stop valve, and finally turn off the power supply of heating tape, damping agent slowly solidifies; Tighten main inlet throttle-stop valve damper bolt, the installation of main inlet throttle-stop valve damper.
9. 1,000,000 grades of nuclear power generating sets main steam system balanced load installation methods as claimed in claim 1, is characterized in that, after the installation of main inlet throttle-stop valve damper, check alloy steel pipeline spectrum check mark, during without mark, should re-start spectral test, and record; Spectrum has checked rear cooperation high pressure cylinder load distribution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193984.XA CN103971767B (en) | 2014-05-09 | 2014-05-09 | 1000000 grades of nuclear power generating sets main steam system balanced load installation methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410193984.XA CN103971767B (en) | 2014-05-09 | 2014-05-09 | 1000000 grades of nuclear power generating sets main steam system balanced load installation methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103971767A CN103971767A (en) | 2014-08-06 |
| CN103971767B true CN103971767B (en) | 2016-03-16 |
Family
ID=51241154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410193984.XA Active CN103971767B (en) | 2014-05-09 | 2014-05-09 | 1000000 grades of nuclear power generating sets main steam system balanced load installation methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103971767B (en) |
-
2014
- 2014-05-09 CN CN201410193984.XA patent/CN103971767B/en active Active
Non-Patent Citations (3)
| Title |
|---|
| 1000MW压水堆核电站辅助设施管道施工;廖建华;《电力建设》;20110731;第32卷(第7期);全文 * |
| 三门AP1000核电站常规岛主蒸汽管道安装方案探索;马千里;《科学时代》;20130923(第14期);全文 * |
| 蒸汽管道安装施工技术;周元斌 朱明华;《安装》;20120315(第3期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103971767A (en) | 2014-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204183172U (en) | A kind of hood type round steel pipe docking adjustment fixture | |
| CN105547617B (en) | A kind of ultra-high voltage transformer station main equipment porcelain bushing shell shock resistance detection method and component | |
| CN110104569A (en) | A kind of method and apparatus of municipal pipeline auxiliary installation | |
| CN202126375U (en) | Full-size bending test device for marine line pipes | |
| US5438862A (en) | System and method for in situ testing of the leak-tightness of a tubular member | |
| CN105129714A (en) | Oil electrostatic safety test device and method based on gasoline-discharging and gasoline-filling processes of gasoline station | |
| CN112304790A (en) | Fatigue test method for heat supply directly-buried pipeline | |
| CN103971767B (en) | 1000000 grades of nuclear power generating sets main steam system balanced load installation methods | |
| CN108488543A (en) | A kind of distribution gas electricity installation method | |
| CN205679388U (en) | A kind of frequency-adjustable channel bend intensity and tired certification test device | |
| RU2666161C1 (en) | Method of testing tube steels on stress corrosion cracking and device for its implementation | |
| CN106049231A (en) | Vehicle-mounted asphalt heat exchange device | |
| CN206056934U (en) | A kind of easy reciprocal non-percussion load charger | |
| Norton | Creep in tubular pressure vessels | |
| CN210742087U (en) | Rock block friction coefficient measuring device based on fluid environment | |
| KR100450283B1 (en) | A overhaul method of a water turbine generator | |
| Bartholomé et al. | Preclusion of double-ended circumferential rupture of the main coolant line | |
| CN109237194A (en) | Temporary pipeline plugging device and pipeline temporary package method | |
| Liu et al. | Effect of Bending Load on Burst Pressure of Nuclear Power Plant Steam Generator Tubes With Uniform Wall Thinning | |
| CN109163862A (en) | A kind of pressure-measuring method of pipe fitting | |
| CN110514525B (en) | Internal pressure contrast test device | |
| CN214748697U (en) | Nuclear power station stabiliser electric heater leakproofness test device | |
| CN106762593A (en) | Vehicle moving pump debugging apparatus | |
| CN115138306B (en) | Method for installing internal parts of continuous reforming reactor and auxiliary device | |
| CN220625737U (en) | Large-scale relief valve verifying attachment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Industrial Road Licheng District, Ji'nan city of Shandong Province, No. 297 250100 Patentee after: China Power Construction Group nuclear power engineering company Address before: Industrial Road Licheng District, Ji'nan city of Shandong Province, No. 297 250100 Patentee before: Shandong Electric Power Construction No.2 Company |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250100 No. 297 industrial North Road, Licheng District, Shandong, Ji'nan Patentee after: POWERCHINA NUCLEAR ENGINEERING Co.,Ltd. Address before: 250100 No. 297 industrial North Road, Licheng District, Shandong, Ji'nan Patentee before: POWERCHINA NUCLEAR ENGINEERING Co. |
|
| CP01 | Change in the name or title of a patent holder |