CN104526249A - Seal weld repairing method and system of nuclear power plant - Google Patents
Seal weld repairing method and system of nuclear power plant Download PDFInfo
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- CN104526249A CN104526249A CN201410650557.XA CN201410650557A CN104526249A CN 104526249 A CN104526249 A CN 104526249A CN 201410650557 A CN201410650557 A CN 201410650557A CN 104526249 A CN104526249 A CN 104526249A
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- weld
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P6/00—Restoring or reconditioning objects
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/02—Nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B49/00—Measuring or gauging equipment on boring machines for positioning or guiding the drill; Devices for indicating failure of drills during boring; Centering devices for holes to be bored
- B23B49/02—Boring templates or bushings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
Abstract
The invention discloses a seal weld repairing method and a system of a nuclear power plant, and solves the technical problems of complex welding line defect repairing process and high welding risk of the nuclear power plant seal weld in the prior art. The method comprises the following steps: (1) multiple first holes are drilled in a welding line defect central line; (2) hole bridges among the first holes are broken to form a groove; (3) a second hole is drilled in a welding line far from the groove by a preset distance for charging argon into a back surface cavity of a welding operation panel; (4) the back surface cavity is cleaned; and the repairing weld is performed for the groove and the second hole; and (5) the appearance, liquid permeation and water pressure test inspections are performed for a repairing welding line. The method realizes the technical effects of easy repairing weld process, provision of sufficient inert gas protection, removal of residual moisture and guarantee of welding quality.
Description
Technical field
The present invention relates to nuclear power station welding technology field, particularly relate to a kind of nuclear power station seal weld repair method and system.
Background technology
The very important manufacture method of nuclear power engineering is built in welding, is nuclear power station manufacture, installs and need the key technology guaranteed in military service maintenance process.Nuclear island critical piece is Welding Structure, and in nuclear island, main pressure-containing member, comprises reactor vessel, evaporimeter, voltage-stablizer, circulating pump and primary Ioops pipeline, and it manufactures with in-site installation is all adopt solder technology.Require the work of nuclear island welded unit long-life high safety reliability under high temperature, high pressure, irradiation and water (vapour) matter environment, welding quality proposes high requirement.
In nuclear power engineering, material therefor kind is a lot, and mother metal and welding material metallurgical quality require high.Nuclear power structure center tap position and complex forms, as J-shaped welding point, as shown in Figure 1A, for nuclear power station control rod controlling organization (CRDM, Control Rod Drive Mechanism) scheme of installation, in the nuclear power station of CPR1000 heap-type, CRDM is positioned at above reactor, the pneumatic shell 1 of CRDM is provided with internal thread, top cover of reactor pressure vessel stub (tube) 2 is provided with the external screw thread mated with internal thread, in the process of installing CRDM, pneumatic shell 1 and top cover of reactor pressure vessel stub (tube) 2 are mated by internal thread and external screw thread and are connected, in addition, as shown in Figure 1B, for pneumatic shell 1 and the welding point schematic diagram of the housing of stub (tube) 2, pneumatic shell 1 adopts welded seal (position that in Figure 1B, dotted line frame is irised out is J-shaped joint) with the housing of stub (tube) 2, its weld seam 3 is finally as a part for reactor pressure vessel pressure boundary, play the effect of sealing.
This in the process of CRDM system installation, for ensureing that a kind of special welding manner that the sealing of pneumatic shell 1 and stub (tube) 2 weld seam uses belongs to seal weld; This weld seam has that mother metal thinner thickness (1.9 ± 0.1mm), inner space are narrow and small, the feature CRDM seal-weld of postwelding space opposing seal.But, in the process of carrying out CRDM seal weld, due to the self-characteristic of arc welding, unacceptable weld defect may be produced.The reparation welding carried out for repairing this unacceptable defect is seal weld and reprocesses.Have that inner space is narrow and small, mother metal thickness is thin just because of this place's weld seam, welded after be difficult to carry out the technical difficulties such as inert gas shielding from inside, reprocessing of CRDM seal weld needs to develop special welding method.
At present, the defect for above-mentioned seal weld has two kinds of reworking plans:
The first reworking plan is: adopt integral cutting solder technology again, and exploitation cutter special tool instrument, added by cutting machine and be held on pneumatic shell, bit alignment weld seam, machinery rotates will cut weld seam position, and weld metal zone entirety excision is re-assemblied welding.Although the first reworking plan can ensure weldquality; But high to processing dimension precision prescribed, should ensure mounting torque after processing, need guarantee group to gap width again, implement comparatively difficulty, simultaneously equipment needs specific customization, it is lower to reprocess success rate, exists to reprocess to have a big risk, and the cycle is long, problem costly.
The second reworking plan is: adopt technology for repairing surfacing, namely at defectiveness position outer surface built-up welding one deck deposited metal, increases bearing cross-section thickness, and the sealing of guarantee equipment is not revealed.But, when finding that unacceptable defect need be reprocessed in postwelding inspection, because its weld seam has, mother metal thinner thickness (1.9 ± 0.1mm), inner space are narrow and small, the feature of postwelding space opposing seal, this scheme is used to carry out reprocessing and be difficult to avoid following three problems for local defect (length is less than 40mm): 1) defect can not be removed completely, there is the possibility of expansion in theory, have the risk again ftractureed; 2) this scheme need carry out theory α coefficient evaluation to the defect remaining in device interior, sets up evaluation model, and theory calculate process is complicated, and evaluation difficulty is large; 3) deposited metal thickness is comparatively large, and welding point local exists stress and concentrates, and butt joint mechanical performance has adverse effect.
Visible, exist in prior art, nuclear power station seal weld weld defect Rework Technics is complicated and weld the technical problem had a big risk.
Summary of the invention
The present invention is directed to the nuclear power station seal weld weld defect Rework Technics that exists in prior art complicated and weld the technical problem had a big risk; a kind of nuclear power station seal weld repair method and system are provided; achieve and reprocess welding simple process, inert gas shielding is provided for the inaccessible back side, stainless steel weld joint back side chamber, get rid of the water pressure test after residual moisture, ensure the technique effect of welding quality.
On the one hand, embodiments provide a kind of nuclear power station seal weld repair method, described method comprises step:
S1, when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side;
S2, disconnect described bridge, to form grooved groove on described weld seam;
S3, on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
S4, described back side chamber to be cleaned, and welding is reprocessed to described grooved groove and described second hole;
S5, reprocess after welding completes described, butt welded seam carries out outward appearance, Liquid Penetrant and water pressure test inspection.
Optionally, in described step S1 ~ S3, while carrying out boring mill operation, described method also comprises:
Dust catcher is utilized to absorb the foreign material boring and formed in honed journey.
Optionally, described dust catcher comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape, and described step S4 specifically comprises the following steps:
S41, described dismantled and assembled suction nozzle to be installed on described fixing suction nozzle, and described dust suction termination is mated with described grooved groove to dock, absorb to make described dust catcher the foreign material boring and fall into described back side chamber in honed journey;
S42, described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
S43, utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration;
S44, employing GTAW weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove;
S45, from described second hole, pull out described argon-filled tube, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
Optionally, when performing step S1 ~ S3, adopting drill bit to carry out drilling operation, described drill bit being provided with a sleeve, for limiting the boring stroke of described drill bit.
Optionally, after described step S42 and before described step S43, described method is further comprising the steps of:
S46, the residual humidity detected by hygrothermograph in the chamber of the described back side, obtain Humidity Detection result;
S47, when described Humidity Detection result to show in the chamber of the described back side that residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C.
Optionally, after described step S44 and before described step S45, described method is further comprising the steps of:
S48, after described grooved groove has all welded, reprocess welding position carry out together not packed column GC light face weldering;
S49, continue the argon gas filling the second preset duration to described back side chamber.
On the other hand, the embodiment of the present invention additionally provides a kind of nuclear power station seal weld repair system, and described system comprises:
Drill module, for when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side; Disconnect described bridge, to form grooved groove on described weld seam; And on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
Clean repair welding module, for cleaning described back side chamber, and reprocesses welding to described grooved groove and described second hole;
Reprocess detection module, for reprocessing after welding completes, butt welded seam is carrying out outward appearance, Liquid Penetrant and water pressure test inspection.
Optionally, described system also comprises: dust catcher, during for carrying out the operation of brill mill at described Drill module, absorbs the foreign material boring and formed in honed journey.
Optionally, described dust catcher comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape; Described clean repair welding module, specifically comprises:
Improvement cleaner unit, for described dismantled and assembled suction nozzle is installed on described fixing suction nozzle, and mate described dust suction termination with described grooved groove and docks, to make the foreign material falling into described back side chamber in the honed journey of described dust catcher absorption brill;
Except water unit, for described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
Repair welding unit, for utilizing the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration; Adopt GTAW to weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove; And described argon-filled tube is pulled out from described second hole, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
Optionally, described Drill module comprises drill bit, for carrying out drilling operation; Described drill bit is provided with a sleeve, for limiting the boring stroke of described drill bit.
Optionally, described clean repair welding module also comprises:
Warm and humid detecting unit, for described weld seam being heated to preset temperature at the described water unit that removes, and after argon-filled tube being passed in described second hole, and utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape at described repair welding unit before, detect the residual humidity in the chamber of the described back side by hygrothermograph, obtain Humidity Detection result;
Temperature reducing unit, during for showing that when described Humidity Detection result in the chamber of the described back side, residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C.
Optionally, described repair welding unit is also for after completing the welding to whole notches of described grooved groove, and before pull out described argon-filled tube from described second hole, reprocess welding position and carrying out together the light face weldering of not packed column GC, and continue the argon gas filling the second preset duration to described back side chamber.
One or more technical scheme provided by the invention, at least has following technique effect or advantage:
Due in the present invention, the whole process that seal weld is reprocessed comprises: 1) defect location and weld preparation, namely on the weld defect position of described seal weld, determines center line, and on described center line, bore multiple the first hole side by side; And by boring mill operation, disconnect the bridge between described multiple first hole, to form grooved groove on described weld seam; Further, the position of grooved groove predeterminable range described in distance on described weld seam, bores second hole for the back side chamber applying argon gas for welding operation face; By described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean; The foreign material (as chip, dust etc.) of described weld defect position and described back side chamber are also absorbed by dust catcher; 2) repair welding, namely utilizes the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration; Adopt GTAW to weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove; From described second hole, pull out described argon-filled tube, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber; 3) test checks, namely reprocessing after welding completes, butt welded seam carries out outward appearance, Liquid Penetrant, water pressure test inspection successively.That is, in defect location and weld preparation stage, by boring multiple first hole on weld defect, and the bridge between each aperture is disconnected, highlighting defective locations makes welding operation be easy to carry out, and uncontrollable defect can not be caused to expand, by boring the second hole (i.e. argon filling hole), for the back side chamber of water-tight equipment provides argon shield environment, by heating to weld seam and filling high-purity argon to described back side chamber, the moisture content remained in after can effectively ensureing the water pressure test in the chamber of the back side is discharged from the first hole and the second hole, to ensure welding quality; Further in the repair welding stage, first the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape is utilized, and in the process of welding, progressively remove adhesive tape, and after whole notch repair welding completes, continue argon filling a period of time, extract argon-filled tube, and the stifled argon filling hole of weldering immediately, ensure that the lasting argon shield of commissure; Solve the nuclear power station seal weld weld defect Rework Technics that exists in prior art complicated and weld the technical problem had a big risk; achieve and reprocess welding simple process, inert gas shielding is provided for the inaccessible back side, stainless steel weld joint back side chamber, get rid of the water pressure test after residual moisture, ensure the technique effect of welding quality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The scheme of installation of the nuclear power station control rod controlling organization that Figure 1A-Figure 1B provides for background technology and top cover of reactor pressure vessel stub (tube);
The first nuclear power station seal weld repair method flow chart that Fig. 2 provides for the embodiment of the present invention;
The second nuclear power station seal weld repair method flow chart that Fig. 3 provides for the embodiment of the present invention;
The seal weld weld defect that Fig. 4 A-Fig. 4 C provides for the embodiment of the present invention reprocesses welding schematic diagram;
The dismantled and assembled nozzle structure schematic diagram of dust catcher that Fig. 5 provides for the embodiment of the present invention;
The structural representation of the drill bit that Fig. 6 provides for the embodiment of the present invention and sleeve;
The third nuclear power station seal weld repair method flow chart that Fig. 7 provides for the embodiment of the present invention;
The 4th kind of nuclear power station seal weld repair method flow chart that Fig. 8 provides for the embodiment of the present invention;
The first nuclear power station seal weld repair system structured flowchart that Fig. 9 provides for the embodiment of the present invention;
The second nuclear power station seal weld repair system structured flowchart that Figure 10 provides for the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention is by providing a kind of nuclear power station seal weld repair method; solve the nuclear power station seal weld weld defect Rework Technics that exists in prior art complicated and weld the technical problem had a big risk; achieve and reprocess welding simple process, inert gas shielding is provided for the inaccessible back side, stainless steel weld joint back side chamber, get rid of the water pressure test after residual moisture, ensure the technique effect of welding quality.
The technical scheme of the embodiment of the present invention is for solving the problems of the technologies described above, and general thought is as follows:
Embodiments provide a kind of nuclear power station seal weld repair method, described method comprises step: when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bores multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side; Disconnect described bridge, to form grooved groove on described weld seam; On described weld seam, the position of grooved groove predeterminable range described in distance, bores the second hole, thinks the back side chamber applying argon gas in welding operation face; Described back side chamber is cleaned, and welding is reprocessed to described grooved groove and described second hole; Reprocess after welding completes, butt welded seam carries out outward appearance, Liquid Penetrant, water pressure test inspection.
Visible, in embodiments of the present invention, in defect location and weld preparation stage, by boring multiple first hole on weld defect, and the bridge between each aperture is disconnected, highlighting defective locations makes welding operation be easy to carry out, and uncontrollable defect can not be caused to expand, by boring the second hole (i.e. argon filling hole), for the back side chamber of water-tight equipment provides argon shield environment, by heating to weld seam and filling high-purity argon to described back side chamber, the moisture content remained in after can effectively ensureing the water pressure test in the chamber of the back side is discharged from the first hole and the second hole, carry out repair welding operation again, to ensure welding quality, further, after repair welding completes, butt welded seam carries out outward appearance, Liquid Penetrant and water pressure test inspection, solve the nuclear power station seal weld weld defect Rework Technics that exists in prior art complicated and weld the technical problem had a big risk, achieve and reprocess welding simple process, inert gas shielding is provided for the inaccessible back side, stainless steel weld joint back side chamber, get rid of the water pressure test after residual moisture, ensure the technique effect of welding quality.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail, the specific features being to be understood that in the embodiment of the present invention and embodiment is the detailed description to technical scheme, instead of the restriction to technical scheme, when not conflicting, the technical characteristic in the embodiment of the present invention and embodiment can combine mutually.
Embodiment one
Please refer to Fig. 2, embodiments provide a kind of nuclear power station seal weld repair method, described method comprises step:
S1, when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side;
S2, disconnect described bridge, to form grooved groove on described weld seam;
S3, on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
S4, described back side chamber to be cleaned, and welding is reprocessed to described grooved groove and described second hole;
S5, reprocess after welding completes described, butt welded seam carries out outward appearance, Liquid Penetrant and water pressure test inspection.
In specific implementation process, in described step S1 ~ S3, while carrying out boring mill operation, described method also comprises: utilize dust catcher to absorb the foreign material boring and formed in honed journey.Further, please refer to Fig. 3, described dust catcher comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape, and described step S4 specifically comprises the following steps:
S41, described dismantled and assembled suction nozzle to be installed on described fixing suction nozzle, and described dust suction termination is mated with described grooved groove to dock, absorb to make described dust catcher the foreign material boring and fall into described back side chamber in honed journey;
S42, described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
S43, utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration;
S44, employing GTAW weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove;
S45, from described second hole, pull out described argon-filled tube, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
In the process of install at nuclear power generating sets, overhauling, welding for some seal chambers or pipeline needs to adopt seal weld, as pneumatic shell and the stub (tube) welding of pressure vessels top cover, the in-core instrumentation system of third generation atomic reactor (EPR, evolutionary power reactors) heap-type nuclear power generating sets and the weldering of top cover flange seal etc. of CRDM (CRDM); Due to the needs of nuclear power station running environment, usual seal chamber or pipeline need carrying gases at high pressure or liquid, therefore require very high for its welding quality.Reprocess for the nozzle weld of the pneumatic shell of CRDM (CRDM) and pressure vessels top cover below and be specifically described:
Please refer to Fig. 4 A, for the seal-weld schematic diagram of the stub (tube) of CRDM pneumatic shell and pressure vessels top cover, in specific implementation process, after CRDM pneumatic shell 1 and stub (tube) 2 have welded, need to carry out outward appearance, Liquid Penetrant, water pressure test inspection successively to weld seam 3 therebetween, check weld seam 3 whether existing defects, and while detecting defect, determine the place, position of weld defect, in Fig. 4 A, there is a weld defect 4 in the weld seam 3 connecting CRDM pneumatic shell 1 and stub (tube) 2, be specially a crack (fracture length is indefinite); Further, determine the axis in described crack, specifically rule of thumb can be estimated by staff, utilize ruler comparison, or the axial location in described crack is determined by modes such as infrared ray location, and using this axis as center line, bore multiple the first hole 41 side by side thereon, described multiple the first hole 41 side by side is all positioned on described crack, when concrete operations, first hole 41 is bored respectively as far as possible at the two ends in described crack, wherein, there is bridge 42 between any two adjacent holes in described multiple the first hole 41 side by side; The aperture in described first hole 41 is determined according to bit diameter, and be generally 3mm, the length of bridge 42 is generally 1mm; Visible, the number in multiple the first hole 41 is side by side determined according to the length in described crack, such as, when the length in described crack is 40mm, needs brill 10 the first holes, when the length in described crack is 30mm, needs brill 8 the first holes.Further, please refer to Fig. 4 B, disconnect bridge 42 by bistrique, namely form grooved groove 43.Thisly first to be punched by butt welded seam rejected region, then disconnect bridge, form the operation of notch, defective locations can be highlighted and make to reprocess welding operation and be easy to carry out, and uncontrollable defect can not be caused to expand.In addition, be poroid situation for weld defect, the operation of boring described first hole can be omitted, or directly hole at defective hole place.
Further, still please refer to Fig. 4 B, back filled argon in welding operation face during for realizing welding, to carry out inert gas shielding, one second hole 44 is bored in welded joints near the center at grooved groove 43 position, its diametric requirements is the smaller the better under meeting the prerequisite of inserting argon gas pipeline, is generally 2mm; In addition, the described predeterminable range L between the second hole 44 and grooved groove 43 is not less than 130mm, with ensure by the second hole 44 to the welding operation that can not affect front during described back side chamber applying argon gas.
In specific implementation process, passing through Liquid Penetrant, the water pressure test checks out in the process of the defect of weld seam, moisture is inevitably made to enter into described back side chamber by weld defect position, if hoard more moisture in the chamber of the described back side, just portion of water can be discharged in brill first hole 41 and the second hole 44, for moisture residual in the chamber of the described back side, by whole piece weld seam being heated to more than 100 DEG C (as 100 DEG C-120 DEG C), argon filling pipe is passed in the second hole 44, high pressure argon gas (purity is greater than 99.995%) and high temperature action is utilized to be got rid of by residual moisture clean.
Further, the residual moisture in the chamber of the described back side is got rid of totally, and namely the preparation of reprocessing repair welding complete, just carries out repair welding below:
1) need before repair welding first to build argon gas room environmental, as shown in Figure 4 C, use the section notches 431 of adhesive seal adhesive tape 5 (as stainless steel adhesive tape) shutoff grooved groove 43, reserve described preset length (as 2-3mm) steam vent 432, be filled with by the second hole 44 (i.e. argon filling hole) high-purity argon that purity is greater than 99.995%, keep the argon filling time to be more than or equal to the first preset duration (as 40 minutes);
2) GTAW is adopted to weld to grooved groove 43 region, concrete, first steam vent 432 is welded, progressively remove described adhesive seal adhesive tape simultaneously, progressively to weld the section notches 431 of shutoff, until complete the welding of the whole notches to grooved groove 43; Afterwards, pull out argon-filled tube, and weld shutoff second hole 44 immediately, prevent the inert gas of described back side chamber from shedding, to ensure back argon shield effect.
Further, reprocessing after repair welding completes, the welding position of reprocessing of butt welded seam carries out outward appearance, Liquid Penetrant, water pressure test inspection successively; If check and determine defect expressivity, can come into operation reprocessing parts, determining still existing defects if check, so still being undertaken reprocessing welding by said method, until weld defect is eliminated.
In specific implementation process, in described step S1 ~ S3, while carrying out boring mill operation (as bored the first hole 41, disconnecting bridge 42, second hole 44), described method also comprises: utilize dust catcher to absorb the foreign material boring and formed in honed journey.The dust catcher that described dust catcher adopts existing welding conventional.Consider and carrying out boring in the process of mill operation, the chip formed can be inevitably made to fall into described back side chamber, in the present embodiment, described dust catcher is improved, dust catcher after improvement comprises fixing suction nozzle and dismantled and assembled suction nozzle, the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat with described grooved groove 43 form fit, after execution step S3, namely performs described step S41.
Concrete, please refer to Fig. 5, described dismantled and assembled suction nozzle is tubulose, its one end be used in use with the fixing suction nozzle assembly and connection of dust catcher, the other end is the dust suction termination of hollow flat, and cross section, described dust suction termination be ellipse, and major diameter is A, minor axis is B.In specific implementation process, described dismantled and assembled suction nozzle usable diameter is that the copper pipe of 10mm makes, hollow flat (as major diameter A=20mm, minor axis B=5mm) is processed into fully to contact with grooved groove 43 place in one end, in use, special described dismantled and assembled suction nozzle is aimed at grooved groove 43, with by the metal fillings of back side chamber interior and dust sucking-off.
In specific implementation process, in order in the process of reprocessing seal weld parts, and carry out holing at the instrument such as drill bit or bistrique of use, when disconnecting bridge operation, damage can not be caused to other object in the chamber of the described back side, when performing step S1 ~ S3, adopting drill bit to carry out drilling operation, described drill bit being provided with a sleeve, for limiting the boring stroke of described drill bit.As shown in Figure 6, be the structural representation of drill bit and sleeve, drill bit 61 and sleeve 62 can be fixedly connected with, and may also be flexible connection; In specific implementation process, if for the mother metal thickness reprocessed of welding fix (as 4mm), so sleeve 62 fixed cover is located on drill bit 61, the stroke h of drill bit 61 is fixed as and is a bit larger tham mother metal thickness (as 5mm), to ensure that mother metal can drill by drill bit; If for the mother metal thickness on-fixed reprocessed of welding, so sleeve 62 is movably set on drill bit 61, and when the mother metal for different-thickness, the relative position of adjustment sleeve 62 and drill bit 61, to change the stroke h of drill bit, while final realization drills mother metal, do not damage the technique effect of the equipment at the seal chamber back side.
For the realization that above-mentioned sleeve and drill bit are flexibly connected, still please refer to Fig. 6, drill bit 61 arranges N number of groove, N be more than or equal to 2 integer, in described N number of groove arbitrary neighborhood two grooves between distance identical (as 0.5mm), sleeve 62 is provided with the through hole that aperture is identical with the groove footpath of described groove; When sleeve 62 is set on drill bit 1, by a metallic pin 63 through the through hole on sleeve 62, and snap in a groove in described N number of groove, to realize the relative position adjusting sleeve 62 and drill bit 61, and after the adjustment to the effect that current location is fixed.
Such as, nuclear power station CRDM seal-weld as shown in Figure 1B reprocesses structure chart, the thickness of mother metal is 2mm, the right of J type joint shown in dotted line circle is welding operation face, the right of J type joint is back side chamber, and stub (tube) 2 is arranged in back side chamber, in order to avoid damaging stub (tube) 2 when being carried out drilling operation by drill bit butt welded seam defect, need sheathed sleeve on drill bit, be a bit larger tham 2mm to make the stroke of drill bit maintain.
In specific implementation process, in order to ensure when weld seam humidity and temperature is best, butt welded seam defect carries out repair welding, to ensure high-quality repair welding effect, please refer to Fig. 7, and after described step S42 and before described step S43, described method is further comprising the steps of:
S46, the residual humidity detected by hygrothermograph in the chamber of the described back side, obtain Humidity Detection result;
S47, when described Humidity Detection result to show in the chamber of the described back side that residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C; Wherein, when weld seam temperature is slightly lower than when 50 DEG C being best welding temperature.
In addition, attractive in appearance in order to make to reprocess welding portion faces, please refer to Fig. 8, after described step S44 and before described step S45, described method is further comprising the steps of:
S48, after described grooved groove has all welded, reprocess welding position carry out together not packed column GC light face weldering;
S49, continue the argon gas filling the second preset duration to described back side chamber.
Wherein, when performing step S48; still need to carry out argon shield at described back side chamber; after described light face is soldered into; in order to provide sufficient argon shield when performing described step S45 and carrying out welding shutoff to described second hole (i.e. argon filling hole); perform described step S45 after the described step S48 of execution before, perform described step S49, described second preset duration is more than or equal to 10 minutes.
In the embodiment of the present application, when welding operation, welding parameter is as shown in table 1:
Table 1
In sum, in the embodiment of the present application, by perforate in welded joints, both served and filled the effect that inert gas carries out stainless steel weld joint inner wall protection, and the residual moisture after the water pressure test can have been got rid of again, expand the scope of application of reprocessing; Use easy protective cover to prevent weld seam inner space open area excessive, improve inwall inert gas shielding effect; Carry out the keyhole degree of depth by design bit run control device, ensure that the structure in weld seam is not destroyed; The program thoroughly can remove defect, without the need to carrying out defect safety evaluation; Carrying out local defect by using this programme to reprocess, reducing the cutting at zero defect position and welding again, improve installation effectiveness, decrease waste of material and duration consumption; Be applicable to inaccessible thin-wall stainless steel seal welding local, inner space by method this programme of perforate reprocess, as CRDM seal-weld reprocess, the in-core instrumentation system of EPR heap-type nuclear power generating sets and top cover flange seal weld.
Embodiment two
Based on same inventive concept, please refer to Fig. 9, the embodiment of the present invention additionally provides a kind of nuclear power station seal weld repair system, comprising:
Drill module 901, for when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side; Disconnect described bridge, to form grooved groove on described weld seam; And on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
Clean repair welding module 902, for cleaning described back side chamber, and reprocesses welding to described grooved groove and described second hole;
Reprocess detection module 903, for reprocessing after welding completes, butt welded seam is carrying out outward appearance, Liquid Penetrant, water pressure test inspection.
In specific implementation process, please refer to Figure 10, described system also comprises: dust catcher 904, during for carrying out the operation of brill mill at described Drill module 901, absorbs the foreign material boring and formed in honed journey.
Further, described dust catcher 904 comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape; Described clean repair welding module 902, specifically comprises:
Improvement cleaner unit 9021, for described dismantled and assembled suction nozzle is installed on described fixing suction nozzle, and mate described dust suction termination with described grooved groove and docks, to make the foreign material falling into described back side chamber in the honed journey of described dust catcher absorption brill;
Except water unit 9022, for described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
Repair welding unit 9023, for utilizing the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration; Adopt GTAW to weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove; And described argon-filled tube is pulled out from described second hole, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
In specific implementation process, described Drill module 901 comprises drill bit, for carrying out drilling operation; Described drill bit is provided with a sleeve, for limiting the boring stroke of described drill bit.
In specific implementation process, still please refer to Figure 10, described clean repair welding module 902 also comprises:
Warm and humid detecting unit 9024, for described weld seam being heated to preset temperature at the described water unit 9022 that removes, and after argon-filled tube being passed in described second hole, and utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape at described repair welding unit 9023 before, detect the residual humidity in the chamber of the described back side by hygrothermograph, obtain Humidity Detection result;
Temperature reducing unit 9025, during for showing that when described Humidity Detection result in the chamber of the described back side, residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C.
In specific implementation process, described repair welding unit 9023 is also for after completing the welding to whole notches of described grooved groove, and before pull out described argon-filled tube from described second hole, reprocess welding position and carrying out together the light face weldering of not packed column GC, and continue the argon gas filling the second preset duration to described back side chamber.
According to description above, above-mentioned seal weld repair system is used for realizing above-mentioned seal weld repair method, so the course of work of this system is consistent with one or more embodiments of said method, has just repeated no longer one by one at this.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a nuclear power station seal weld repair method, is characterized in that, described method comprises step:
S1, when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side;
S2, disconnect described bridge, to form grooved groove on described weld seam;
S3, on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
S4, described back side chamber to be cleaned, and welding is reprocessed to described grooved groove and described second hole;
S5, reprocess after welding completes described, butt welded seam carries out outward appearance, Liquid Penetrant and water pressure test inspection.
2. nuclear power station seal weld repair method as claimed in claim 1, is characterized in that, in described step S1 ~ S3, while carrying out boring mill operation, described method also comprises:
Dust catcher is utilized to absorb the foreign material boring and formed in honed journey.
3. nuclear power station seal weld repair method as claimed in claim 2, it is characterized in that, described dust catcher comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape, and described step S4 specifically comprises the following steps:
S41, described dismantled and assembled suction nozzle to be installed on described fixing suction nozzle, and described dust suction termination is mated with described grooved groove to dock, absorb to make described dust catcher the foreign material boring and fall into described back side chamber in honed journey;
S42, described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
S43, utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration;
S44, employing GTAW weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove;
S45, from described second hole, pull out described argon-filled tube, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
4. the nuclear power station seal weld repair method as described in claim as arbitrary in claims 1 to 3, is characterized in that, when performing step S1 ~ S3, adopting drill bit to carry out drilling operation, described drill bit being provided with a sleeve, for limiting the boring stroke of described drill bit.
5. nuclear power station seal weld repair method as claimed in claim 4, it is characterized in that, after described step S42 and before described step S43, described method is further comprising the steps of:
S46, the residual humidity detected by hygrothermograph in the chamber of the described back side, obtain Humidity Detection result;
S47, when described Humidity Detection result to show in the chamber of the described back side that residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C.
6. nuclear power station seal weld repair method as claimed in claim 4, it is characterized in that, after described step S44 and before described step S45, described method is further comprising the steps of:
S48, after described grooved groove has all welded, reprocess welding position carry out together not packed column GC light face weldering;
S49, continue the argon gas filling the second preset duration to described back side chamber.
7. a nuclear power station seal weld repair system, is characterized in that, described system comprises:
Drill module, for when behind the weld defect position determining seal weld, based on the axis of described weld defect position, the weld seam of described seal weld determines center line, and on described center line, bore multiple the first hole side by side; Wherein, there is bridge between any two adjacent holes in described multiple the first hole side by side; Disconnect described bridge, to form grooved groove on described weld seam; And on described weld seam the position of grooved groove predeterminable range described in distance, bore the second hole, think the back side chamber applying argon gas in welding operation face;
Clean repair welding module, for cleaning described back side chamber, and reprocesses welding to described grooved groove and described second hole;
Reprocess detection module, for reprocessing after welding completes, butt welded seam is carrying out outward appearance, Liquid Penetrant and water pressure test inspection.
8. nuclear power station seal weld repair system as claimed in claim 7, it is characterized in that, described system also comprises: dust catcher, during for carrying out the operation of brill mill at described Drill module, absorbs the foreign material boring and formed in honed journey.
9. nuclear power station seal weld repair system as claimed in claim 8, it is characterized in that, described dust catcher comprises fixing suction nozzle and dismantled and assembled suction nozzle, and the dust suction termination of described dismantled and assembled suction nozzle is the hollow flat mated with described grooved bevel shape; Described clean repair welding module, specifically comprises:
Improvement cleaner unit, for described dismantled and assembled suction nozzle is installed on described fixing suction nozzle, and mate described dust suction termination with described grooved groove and docks, to make the foreign material falling into described back side chamber in the honed journey of described dust catcher absorption brill;
Except water unit, for described weld seam is heated to preset temperature, and argon-filled tube is passed in described second hole, utilize high pressure argon gas and high temperature to be got rid of by the residual moisture of described back side chamber clean;
Repair welding unit, for utilizing the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape, and the notch of reserved preset length is as steam vent; Meanwhile, the argon filling time is kept to be more than or equal to the first preset duration; Adopt GTAW to weld described steam vent, meanwhile, progressively remove described adhesive seal adhesive tape, until complete the welding of the whole notches to described grooved groove; And described argon-filled tube is pulled out from described second hole, weld the second hole described in shutoff immediately, ensure the argon shield effect of described back side chamber.
10. the nuclear power station seal weld repair system as described in claim as arbitrary in claim 7 ~ 9, it is characterized in that, described Drill module comprises drill bit, for carrying out drilling operation; Described drill bit is provided with a sleeve, for limiting the boring stroke of described drill bit.
11. nuclear power station seal weld repair systems as claimed in claim 10, is characterized in that, described clean repair welding module also comprises:
Warm and humid detecting unit, for described weld seam being heated to preset temperature at the described water unit that removes, and after argon-filled tube being passed in described second hole, and utilize the section notches of grooved groove described in the shutoff of adhesive seal adhesive tape at described repair welding unit before, detect the residual humidity in the chamber of the described back side by hygrothermograph, obtain Humidity Detection result;
Temperature reducing unit, during for showing that when described Humidity Detection result in the chamber of the described back side, residual moisture is got rid of clean, stop heating described weld seam, and continue applying argon gas in the chamber of the described back side by described second hole, until the heating region surface temperature slow cooling of described weld seam is to less than 50 DEG C.
12. nuclear power station seal weld repair systems as claimed in claim 10, it is characterized in that, described repair welding unit is also for after completing the welding to whole notches of described grooved groove, and before pull out described argon-filled tube from described second hole, reprocess welding position and carrying out together the light face weldering of not packed column GC, and continue the argon gas filling the second preset duration to described back side chamber.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030040A (en) * | 1988-04-05 | 1989-01-04 | 重庆大学 | New method of amending surface defects of castings |
| JPH02133192A (en) * | 1988-11-14 | 1990-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | Repairing method for inside surface of vessel through-pipe |
| US5674419A (en) * | 1994-07-05 | 1997-10-07 | Hitachi, Ltd. | Method for weld repairing of structures in nuclear reactors |
| CN103231201A (en) * | 2013-04-24 | 2013-08-07 | 彭兴礼 | Method for repairing abrasion of drive housing seal position of shield machine |
-
2014
- 2014-11-14 CN CN201410650557.XA patent/CN104526249B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030040A (en) * | 1988-04-05 | 1989-01-04 | 重庆大学 | New method of amending surface defects of castings |
| JPH02133192A (en) * | 1988-11-14 | 1990-05-22 | Ishikawajima Harima Heavy Ind Co Ltd | Repairing method for inside surface of vessel through-pipe |
| US5674419A (en) * | 1994-07-05 | 1997-10-07 | Hitachi, Ltd. | Method for weld repairing of structures in nuclear reactors |
| CN103231201A (en) * | 2013-04-24 | 2013-08-07 | 彭兴礼 | Method for repairing abrasion of drive housing seal position of shield machine |
Non-Patent Citations (1)
| Title |
|---|
| 张学锋: "秦山核电站凝汽器钛材管板焊缝的表面检验", 《无损检测》 * |
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| CN108098251A (en) * | 2017-12-20 | 2018-06-01 | 重庆洛昂机械有限公司 | For the method for maintaining of safety-valve |
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| CN109909585A (en) * | 2019-03-12 | 2019-06-21 | 中广核工程有限公司 | A kind of build-up welding repair method and system for the maintenance of stainless steel branch pipe weld seam |
| CN110948106A (en) * | 2019-11-01 | 2020-04-03 | 上海核工程研究设计院有限公司 | Sealing weld joint all-in-one machine of nuclear reactor control rod driving mechanism and operation method |
| CN111318789A (en) * | 2020-03-12 | 2020-06-23 | 东方电气(广州)重型机器有限公司 | Welding method of electric heating element of voltage stabilizer |
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