CN102759537A - Radiographic testing method for welding beams under radioactive environment of nuclear power station - Google Patents
Radiographic testing method for welding beams under radioactive environment of nuclear power station Download PDFInfo
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- CN102759537A CN102759537A CN2012102467601A CN201210246760A CN102759537A CN 102759537 A CN102759537 A CN 102759537A CN 2012102467601 A CN2012102467601 A CN 2012102467601A CN 201210246760 A CN201210246760 A CN 201210246760A CN 102759537 A CN102759537 A CN 102759537A
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Abstract
The invention relates to a radiographic testing method for welding beams under the radioactive environment of a nuclear power station. The radiographic testing method is used for testing the welding seams through rays under the radioactive environment. The radiographic testing method comprises three stages of preparation, operation and after-treatment, wherein the preparation of a tag system, the assembly of a hidden bag system, the debugging of an exposure system, the manufacture of an auxiliary accessory system and the budgeting of a data computing system are involved in the preparation stage; in the operation stage, a lead rule and a tag identification label are connected near the welding seams to locate the welding seams, the hidden bag system is fixed so as to cover the welding seams, and a spherical center exposure method or a central exposure method or a double-wall single image exposure method or a double-wall double-image exposure method is adopted for imaging on a photographic film; and in the after-treatment stage, the photographic film is processed into a negative film, and the negative film is evaluated. The radiographic testing method has the advantages that the working procedures and tools in the traditional radiographic testing processed are optimized, the accuracy is high, less time is consumed, the imaging quality is high, and the transillumination risk of workers in a high radiation region is effectively reduced.
Description
Technical field
The present invention relates to a kind of ray detection method that under radioactive environment, detects weld seam.
Background technology
The method of existing weld seam Non-Destructive Testing is normally carried out under normal natural conditions, and it is not to all there being the restriction of strict time in preparation, operation, the aftertreatment.And these classical way processes have following problem when being applied in the detection of relevant device in the nuclear power station:
1, the working time limits strict: because everyone limits the working time under the radiation environment; The article of all preparations must be simple, light, simple to operate and accurate; Accomplish all process steps of regulation at the appointed time; Lack requirement in the classical way, shine danger to such an extent as to be used for having increased personnel under the nuclear power environment to the working time;
2, radiation protection and industrial safety: because the protective articles of indispensability (generally being that nuclears such as conjoined clothes, gloves, undershirt are with seven covers) under the radiation environment; When getting into high radioactivity or have the control zone of internal contamination risk environment, must dress the additional protection articles for use; Like emgloves, paper clothing, plumbous clothing, plumbous glasses, gas face shield, breathing apparatus, welding bottle, tracheae etc.; The weight of its equipment and safety event complexity are high; Add the radiation risk of ray detection itself, so, need the brand-new ray detection method system of optimizing of a cover to complement each other with operating mode with nuclear power along with the growing out of nothing of domestic nuclear power station Non-Destructive Testing under battle conditions;
3, the people is because of slipping up: Non-Destructive Testing was at historical nearly 50 years of China, and the Non-Destructive Testing that is applied in nuclear power industry then is few.Ray detection is the method for display defect the most directly perceived in the Non-Destructive Testing, so the error of each step, carelessness all are that this is detected destructive repetition.The in-Service Inspection of Nuclear Power Station duration arranges ten minutes compact, and key position detects the continuous working of wanting personnel usually, and wherein the ray detection transillumination time is long, task is many, adds that it often belongs to the content of working at night, so in more not allowing to detect failure is not arranged.Classical way does not have too much reinforcement in this respect, and a transillumination failure is transillumination again.But nuclear power station need be walked very long management process, so chance repeatedly is few, cost is bigger;
4, nuclear power station is higher than other industry to the ray detection quality requirements: nuclear energy is the whole mankind's thing, and the least bit that is unable to hold error is so particularly pay attention to the requirement of quality.The relative other industry of the detection level that the nuclear power ray detection adopts is high.So the sensitivity and the defect location precision of general egative film can not satisfy the nuclear power requirement; Nuclear power is examined its detection and location precision classical way of weld seam mostly weld seam be that surface finish is crossed and can't be satisfied.
5, personnel custom different in the work: the people often exists various work habits at work, and these customs require few in non-nuclear industry, if useful to working, even have the performance of encouraging the personal presentation.But under the nuclear industry operating mode, safety responsibility is weightier than Mount Tai, so need optimize all each actions of participating in work briefly, and the uncertain factor that produces because of individual performance can not occur.
In sum, optimize existing detection method so that its be applied to accurately under the nuclear power operating mode fast imperative.
Summary of the invention
The purpose of this invention is to provide a kind of weld seam detection of under the nuclear power station radioactive environment, implementing, improve the weld seam ray detection method of transillumination quality to reach effective shortening activity duration through Optimizing operation operation, improvement instrument.
For achieving the above object, the technical scheme that the present invention adopts is:
The ray detection method of weld seam under a kind of nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam in ray detection method for detecting large-diameter pipe road; It comprises preparation, operation, aftertreatment three phases; In the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprises plumbous chi, the image quality indicator with reference to the egative film image quality, the mark mark label that described weld seam is positioned; Described plumbous chi marked has font, leads; Described font shows with the length numerical value of described plumbous chi consistent; Be provided with the leads that described weld seam is carried out axial location in the middle of the adjacent described font; Described plumbous chi is arranged on the position of described mark mark label defined, and described mark mark label marked has the locating information of the dimension information and the described weld seam of described weld seam;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark mark label is pasted on the described commissure of the outside surface in described large-diameter pipe road; The position that is shown according to described mark mark label places described plumbous chi and described image quality indicator positions and the quality reference described weld seam; Described image quality indicator is positioned on the circumferential position of described weld seam; The stationkeeping that described camera bag system reference marker mark label is shown is in the relevant position of described large-diameter pipe pipeline outer wall and cover described weld inspection zone; Adopt the center exposure method, exposure is accomplished in the center of moving in described radiographic source to the described large-diameter pipe road, thereby on described film, forms images;
In the described post-processing stages, comprise described film is processed into egative film and egative film is evaluated in the darkroom.
Preferably, the font of described plumbous chi marked is that plumbous system numeral and described font are evenly arranged.
Preferably, described camera bag system is rectangular and have a face that matches with the outside surface in described large-diameter pipe road.
Preferably, in the described operational phase, adopt many adjacent weld seams of same described Mk system mark.
Preferably, in the described operational phase, adopt the fixing camera bag system on the weld seam that covers of strapping, when said large-diameter pipe road vertically moves towards, adopt the tray strapping to be bound in the camera bag below to prevent the downslide of camera bag system.
The ray detection method of weld seam under a kind of nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam of the base of ray detection method for detecting pressure vessel; It comprises preparation, operation, aftertreatment three phases; In the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprise font that described weld seam is circumferentially located, to described weld seam carry out the leads of radial location, with reference to the image quality indicator of egative film image quality, have the mark mark label of weld seam information; Described mark mark label marked the have any different sign of each described other mark mark labels, the dimension information of weld seam and the locating information of described weld seam; Described font, the sticking card of leads also are marked with the position of described image quality indicator on indivedual mark mark labels on the position that described mark mark label marks;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark sign is radially pasted along weld seam on the weld seam of described base on the surface that is pasted on described pressure vessel; The information that shows according to the mark mark label of described Mk system overlaps described mark mark label and the permanent identification above the described base weld seam its sticking being posted on the described weld seam; Described image quality indicator is connected in the commissure of the base of described pressure vessel according to the position of mark mark label demonstration; The stationkeeping that described camera bag system is shown according to the mark mark label makes it cover described weld inspection zone in the relevant position of described pressure vessel outer wall; Adopt centre of sphere panoramic exposure method; The centre of sphere place that moves described radiographic source to described pressure vessel accomplishes exposure, thereby on described film, forms images;
In the described post-processing stages, comprise described film is processed into egative film and egative film is evaluated in the darkroom.
Preferably, described font evenly is arranged in described one week of weld seam for digital and described font, and described arbitrarily font below is provided with the leads that described weld seam is carried out radial location.
Preferably, described camera bag system is curved and have the face that matches with the surface of described pressure vessel, and the periphery of described camera bag evenly is provided with magnet.
Preferably, when regional narrow and small of detection weld seam, described weld seam information is marked on the particular manufacturing craft of this weld seam in advance, can the home operation be transferred in the located in connection work of described operational phase in high radiation dose rate or space.
The ray detection method of weld seam under a kind of nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam of ray detection method for detecting pipeline path; It comprises preparation, operation, aftertreatment three phases; In the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprise indicia band that described weld seam is circumferentially located, to described weld seam carry out the leads of axial location, with reference to the image quality indicator of egative film image quality, have the mark mark label of weld seam information; Described indicia band marked has font, is provided with described leads in the middle of the adjacent font; Described mark mark label marked has dimension information and the locating information of described weld seam and the placement location of indicia band of described weld seam;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark mark label is pasted on the described commissure of the outside surface of described pipeline path; Place described indicia band according to the display position of described mark mark label; Described camera bag system is fixed in the relevant position of described pipeline path outer wall according to mark mark label display position and covers described weld inspection zone; Adopt double-walled list shadow exposure method or double-walled slur exposure method, move described radiographic source to exposure station place and accomplish exposure, thereby on described film, form images;
In the described post-processing stages, comprise described film is treated to egative film and egative film is evaluated in the darkroom.
Preferably, the font of described indicia band marked is evenly arranged for digital and described font.
Preferably, described film is rectangle or has the face that matches with the outside surface of described pipeline path.
Because the technique scheme utilization, the present invention compared with prior art has advantage: the process that traditional detection personnel aim at weld seam with camera bag has been optimized in the utilization of Mk system, has improved precision, has reduced the time, has controlled the absorbed dose of working team; The process that the application of plumbous chi has been omitted and measured the large pipeline girth in earlier stage, sought overlap joint font and label creating in the large-diameter pipe road weld seam has reduced operating error, has improved precision; Finally effectively improved shine the object negative quality; The utility of the specific purpose tool of exposure system and auxiliary accessory system provides fabulous facility for the continuous working under the radioactivity operating mode.
Description of drawings
Accompanying drawing 1 is the synoptic diagram of the weld seam in large-diameter pipe road.
Accompanying drawing 2 is the step synoptic diagram of embodiments of the invention one.
Accompanying drawing 3 is the step synoptic diagram of embodiments of the invention one.
Accompanying drawing 4 is the exposure synoptic diagram of embodiments of the invention one.
Accompanying drawing 5 is the synoptic diagram of the local weld seam of the base of pressure vessel.
Accompanying drawing 6 is the step synoptic diagram of embodiments of the invention two.
Accompanying drawing 7 is the step synoptic diagram of embodiments of the invention two.
Accompanying drawing 8 is the exposure synoptic diagram of embodiments of the invention two.
Accompanying drawing 9 is the step synoptic diagram of embodiments of the invention three.
Accompanying drawing 10 is the exposure synoptic diagram of embodiments of the invention three.
Accompanying drawing 11 is the film configuration schematic diagram of embodiments of the invention three.
In the above accompanying drawing: 1, weld seam; 2, pressure vessel base; 3, large-diameter pipe road; 4, pipeline path; 5, plumbous chi; 6, mark mark label; 7, radiographic source; 8, camera bag; 9, indicia band.
Embodiment
Below in conjunction with embodiment shown in the drawings the present invention is further described.
Embodiment one: the ray detection method of weld seam under a kind of radioactive environment is used under radioactive environment the weld seam 1 through the large-diameter pipe road 3 of ray detection method for detecting shown in accompanying drawing 1.Representing weld seam is that evaporator and main pipeline of reactor weld seam and all can be carried out the pipe welding seam of center exposure.
This ray detection method comprises preparation, operation, aftertreatment three phases.In preparatory stage, comprise Mk system, camera bag system, exposure system, auxiliary accessory system and the data computation system prepared.
Mk system comprises the font that plumbous chi 5, plumbous chi 5 that butt welded seam 1 positions comprise that butt welded seam 1 is circumferentially located and the leads of axial location; Wherein font is that plumbous system numeral and font are evenly arranged by length direction; Wherein leads is arranged between adjacent font, and image quality indicator is uniformly distributed with in the girth scope of plumbous chi 5; Mark mark label 6 has many and be distributed in one week of weld seam, every mark mark label 6 marked have any different identification marking, the weld seam relative dimensions information locating information relevant with weld inspection of each mark mark label 6;
The camera bag system comprises filter, intensifying screen, camera bag, film 8, anti-backpiece screen, and film 8 is put into camera bag, and identification marking, pros and cons and the opening of the rear indicia film pre-exposure at the edge of camera bag towards; The camera bag system is rectangular and have a face that matches with large-diameter pipe road 3;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
After above-mentioned each system was ready to, with sticking being posted on the transparent sticking obedient plate of magnetic such as the mark mark label of Mk system, plumbous chi, image quality indicators, to be convenient for carrying use, the article of preparation were all put into the both shoulders saddlebag and are brought to the scene.Carry out the operational phase; At first the mark mark label evenly is pasted on weld seam 1 place of the outside surface in large-diameter pipe road 3; The steel seal sign that mark mark label 6 is attend on the tube wall in coincide point and large-diameter pipe road 3 of institute's mark coincides, according to sticking obedient plumbous chi 5 of the display position of mark mark label and weld seam 1 surface.Before pasting plumbous chi 5, confirm the lapping direction of camera bag through the steel seal that forever flows at weld seam 1 place according to unified right-hand rule rule, shown in accompanying drawing 2.
After positioning with mark mark label 6 butt welded seams 1 through above-mentioned plumbous chi 5, shown in accompanying drawing 3, the camera bag system is fixed in the relevant position of large-diameter pipe road 3 outer walls and covers weld seam 1, the aligning baseline that is marked on the edge aligned mark mark label 6 of camera bag.Film 8 is rectangular and have the face that matches with the outside surface in large-diameter pipe road 3, and each camera bag overlaps on the Examination region that is looped around weld seam 1 in order.The operating personnel need dress protective gloves when fixing above-mentioned plumbous chi 5, mark mark label 6 and camera bag system; The operating personnel can implement operation through the portable bracelet of carrying of quick Continuous pressing device for stereo-pattern function of realizing, reaches sharp work, the purpose of shortening activity duration.
Shown in accompanying drawing 4, when exposure, adopt the center exposure method, promptly move the center in radiographic source 7 to the large-diameter pipe road 3 and shine weld seam 1 and accomplish exposure, thus imaging on film 8.When irradiation, both can adopt the center transillumination also can adopt eccentric transillumination.After the imaging, take off the camera bag system and get into post-processing stages, film 8 is treated to egative film and egative film is evaluated in the darkroom.When dismounting camera bag system, can adopt integral body to tear method or the single method of tearing open open.
Defective on the egative film shows that localization method is serves as that institute examine regional circumferential location with the vertical corresponding font image of defective image institute that is shown, with the defective image that shown to the distance of leads image serve as examined regional axial (weld width direction) and located.
Because mostly nuclear power station large-diameter pipe road 3 weld seams are dissimilar metal weld, safe end and the steel position while welding of the same race pattern that links to each other successively; And use the steel impression mark of the same starting point and the flow direction; So once Mk system is attached on the middle safe end position of twice weld seam; Can realize the effect of disposable mark location twice weld seam, optimize the job step of the second road weld inspection and reduced a staff receiving at high radiation area according to the time.
Embodiment two: the ray detection method of weld seam under a kind of radioactive environment is used under radioactive environment the weld seam 1 through the base of the pressure vessel 2 of ray detection method for detecting shown in accompanying drawing 5.Pressure vessel 2 is spherical in shape, and weld seam 1 on above-mentioned sphere ringwise.Representing weld seam is each position base weld seam of voltage stabilizer equipment.
This ray detection method comprises preparation, operation, aftertreatment three phases.In preparatory stage, comprise Mk system, camera bag system, exposure system, auxiliary accessory system and the data computation system prepared.
Mk system comprises mark mark label 6; Comprise the font of circumferentially locating on the mark mark label 6 to 1, to 1 carry out radial location leads, camera bag alignment line and the mark that 1 surperficial steel seal is overlapped; And the width of welding heat affected zone; Also be marked with the position with reference to the picture element of egative film image quality on indivedual mark mark labels 6, font makes numeral for lead and font evenly is arranged on the base weld seam respective angles in one week, and mark mark label 6 total numbers are pressed the required camera bag quantity decision of weld seam; Wherein there are three mark mark labels 6 to show on each camera bag, the have any different identification marking of each mark mark label 6 of every mark mark label 6 marked.
The camera bag system comprises filter, intensifying screen, camera bag, film 8, anti-backpiece screen, and film 8 is put into camera bag, and identification marking, pros and cons and the opening of the rear indicia film pre-exposure at the edge of camera bag towards; The camera bag system is curved and have the face that matches with the surface 2 of pressure vessel, and the periphery of camera bag evenly is provided with magnet.
Exposure system comprises radiographic source 7, conduit, shakes source tray, and radiographic source 7 is arranged at the end of conduit, shakes source tray control conduit drive radiographic source 7 and moves.
After above-mentioned each system was ready to, with sticking being posted on the transparent sticking obedient plate of magnetic such as the mark mark label of Mk system, plumbous chi, image quality indicators, to be convenient for carrying use, the article of preparation were all put into the both shoulders saddlebag and are brought to the scene.Carry out the operational phase; At first mark mark label 6 evenly is pasted on weld seam 1 place on the surface of pressure vessel 2; Make the mark mark label attend the coincide point of institute's mark and the permanent identification on the tube wall coincides; Wherein, the start mark on the mark mark label 6 aligns with the starting point steel seal of the base place butt welded seam 1 of pressure vessel 2, according to the sticking successively obedient mark mark label 6 of steel seal order.When binding mark mark label 6, can confirm bonding lapping direction through the permanent digital steel seal at weld seam 1 place.Shown in accompanying drawing 6, wherein, must not be less than 3 according to every weld seam of transillumination standard-required 1 employed image quality indicator because indivedual mark mark label 6 is connecting image quality indicator; The generalized case image quality indicator is divided equally the week in weld seam.
After positioning through above-mentioned mark mark label 6 butt welded seams 1, shown in accompanying drawing 7, the relevant position of the camera bag system being fixed in pressure vessel 2 outer walls makes it cover weld seam 1, the aligning baseline that is marked on the edge aligned mark mark label of camera bag.Film 8 is curved and have an arcwall face that matches with the surface of pressure vessel 2.The operating personnel need dress protective gloves when fixing above-mentioned mark mark label 6 and camera bag system, and the operating personnel can implement operation through the portable bracelet of carrying of quick Continuous pressing device for stereo-pattern function of realizing, reaches sharp work, the purpose of shortening activity duration.
Shown in accompanying drawing 8, when exposure, adopt centre of sphere exposure method, promptly move the centre of sphere place of radiographic source 7 to pressure vessel 2 and shine weld seam 1 and accomplish exposure, thus imaging on film 8.After the imaging, take off the camera bag system and get into post-processing stages, film 8 is treated to egative film and egative film is evaluated in the darkroom.When dismounting camera bag system, can adopt integral body to tear method or the single method of tearing open open; Wherein the integral body method of tearing open can reduce the work on the spot residence time, follow-up housekeeping is arranged in the low-activity zone carries out.
Defective on the egative film shows that localization method is serves as that institute examine regional circumferential location with the vertical corresponding font image numerical value of defective image institute that is shown, with the defective image that shown to the distance of leads image serve as examined regional radially (weld width direction) and located.
At some in particular cases; When having narrow and small regional in high radiation dose rate, surface corrosion or space when pressure vessel 2 surfaces; Described weld seam information is marked on the particular manufacturing craft of this weld seam in advance, can the home operation be transferred in the located in connection work of described operational phase.
Embodiment three: the ray detection method of weld seam under a kind of radioactive environment is used under radioactive environment the weld seam 1 through ray detection method for detecting pipeline path 4.Representing weld seam is the pipe welding seam of voltage stabilizer ozzle and upper cover weld seam, two or three grades of parts and subsidiary conduit double-walled transillumination.
This ray detection method comprises preparation, operation, aftertreatment three phases.In preparatory stage, comprise Mk system, camera bag system, exposure system, auxiliary accessory system and the data computation system prepared.
Detect similarly with large-diameter pipe road 3, Mk system comprises the indicia band 9 that butt welded seam 1 circumferentially locatees, leads, the image quality indicator that butt welded seam 1 carries out axial location.Indicia band 9 marked have font, and font makes numeral for lead and font is evenly arranged.Mark mark label 6 marked have any different sign, weld seam information and the relevant checking information of each mark mark label 6.
The camera bag system comprises filter, intensifying screen, camera bag, film 8, anti-backpiece screen, and film 8 is put into camera bag, and identification marking, pros and cons and the opening of the rear indicia film pre-exposure at the edge of camera bag towards; The camera bag system is rectangular and have a face that matches with pipeline path 4;
Exposure system comprises radiographic source 7, conduit, shakes source tray, and radiographic source 7 is arranged at the end of conduit, shakes source tray control conduit drive radiographic source 7 and moves.
After above-mentioned each system was ready to, with sticking being posted on the transparent sticking obedient plate of magnetic such as the mark mark label of Mk system, plumbous chi, image quality indicators, to be convenient for carrying use, the article of preparation were all put into the both shoulders saddlebag and are brought to the scene.Carry out the operational phase; Similar with the location of large pipeline 3 weld seams 1; At first the mark mark label evenly is pasted on weld seam 1 place of the outside surface of small pipeline 4, the permanent identification that the mark mark label is attend on the tube wall of coincide point and small pipeline 4 of institute's mark coincides, in the zone that sticking card of indicia band 9 and image quality indicator and mark mark label 6 are shown; The camera bag system is fixed in the relevant position of small pipeline 4 outer walls and covers weld seam 1, the aligning baseline that is marked on the edge aligned mark mark label of camera bag.Shown in accompanying drawing 9.
With shown in the accompanying drawing 11, when exposure, adopt double-walled list shadow exposure method or double-walled slur exposure method referring to accompanying drawing 10.Move the assigned position place irradiation weld seam 1 of the outside of radiographic source 7 to small pipeline 4 and accomplish exposure, thus imaging on film 8.After the imaging, take off the camera bag system and get into post-processing stages, film 8 is treated to egative film and egative film is evaluated in the darkroom.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (12)
1. the ray detection method of weld seam under the nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam in ray detection method for detecting large-diameter pipe road; It comprises preparation, operation, aftertreatment three phases; It is characterized in that: in the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprises plumbous chi, the image quality indicator with reference to the egative film image quality, the mark mark label that described weld seam is positioned; Described plumbous chi marked has font, leads; Described font shows with the length numerical value of described plumbous chi consistent; Be provided with the leads that described weld seam is carried out axial location in the middle of the adjacent described font; Described plumbous chi is arranged on the position of described mark mark label defined, and described mark mark label marked has the locating information of the dimension information and the described weld seam of described weld seam;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark mark label is pasted on the described commissure of the outside surface in described large-diameter pipe road; The position that is shown according to described mark mark label places described plumbous chi and described image quality indicator positions and the quality reference described weld seam; Described image quality indicator is positioned on the circumferential position of described weld seam; The stationkeeping that described camera bag system reference marker mark label is shown is in the relevant position of described large-diameter pipe pipeline outer wall and cover described weld inspection zone; Adopt the center exposure method, exposure is accomplished in the center of moving in described radiographic source to the described large-diameter pipe road, thereby on described film, forms images;
In the described post-processing stages, comprise described film is processed into egative film and egative film is evaluated in the darkroom.
2. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 1 is characterized in that: the font of described plumbous chi marked makes numeral for lead and described font is evenly arranged.
3. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 1 and 2 is characterized in that: described camera bag system is rectangular and have a face that matches with the outside surface in described large-diameter pipe road.
4. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 1 and 2 is characterized in that: in the described operational phase, adopt many adjacent weld seams of same described Mk system mark.
5. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 1; It is characterized in that: in the described operational phase; Adopt the fixing camera bag system on the weld seam that covers of strapping; When said large-diameter pipe road vertically moves towards, adopt the tray strapping to be bound in the camera bag below to prevent the downslide of camera bag system.
6. the ray detection method of weld seam under the nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam of the base of ray detection method for detecting pressure vessel; It comprises preparation, operation, aftertreatment three phases; It is characterized in that: in the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprise font that described weld seam is circumferentially located, to described weld seam carry out the leads of radial location, with reference to the image quality indicator of egative film image quality, have the mark mark label of weld seam information; Described mark mark label marked the have any different sign of each described other mark mark labels, the dimension information of weld seam and the locating information of described weld seam; Described font, the sticking card of leads also are marked with the position of described image quality indicator on indivedual mark mark labels on the position that described mark mark label marks;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark sign is radially pasted along weld seam on the weld seam of described base on the surface that is pasted on described pressure vessel; The information that shows according to the mark mark label of described Mk system overlaps described mark mark label and the permanent identification above the described base weld seam its sticking being posted on the described weld seam; Described image quality indicator is connected in the commissure of the base of described pressure vessel according to the position of mark mark label demonstration; The stationkeeping that described camera bag system is shown according to the mark mark label makes it cover described weld inspection zone in the relevant position of described pressure vessel outer wall; Adopt centre of sphere panoramic exposure method; The centre of sphere place that moves described radiographic source to described pressure vessel accomplishes exposure, thereby on described film, forms images;
In the described post-processing stages, comprise described film is processed into egative film and egative film is evaluated in the darkroom.
7. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 6; It is characterized in that: described font evenly is arranged in described one week of weld seam for digital and described font, and described arbitrarily font below is provided with the leads that described weld seam is carried out radial location.
8. according to the ray detection method of weld seam under claim 6 or the 7 described nuclear power station radioactive environments; It is characterized in that: described camera bag system is curved and have the face that matches with the surface of described pressure vessel, and the periphery of described camera bag evenly is provided with magnet.
9. according to the ray detection method of weld seam under claim 6 or the 7 described nuclear power station radioactive environments; Its special type is: when regional narrow and small in high radiation dose rate or space of detection weld seam; Described weld seam information is marked on the particular manufacturing craft of this weld seam in advance, can the home operation be transferred in the located in connection work of described operational phase.
10. the ray detection method of weld seam under the nuclear power station radioactive environment; Be used under radioactive environment, passing through the weld seam of ray detection method for detecting pipeline path; It comprises preparation, operation, aftertreatment three phases; It is characterized in that: in the described preparatory stage, comprise the preparation of Mk system, the assembling of camera bag system, the debugging of exposure system, the making of auxiliary accessory system, the budget of data computation system;
Described Mk system comprise indicia band that described weld seam is circumferentially located, to described weld seam carry out the leads of axial location, with reference to the image quality indicator of egative film image quality, have the mark mark label of weld seam information; Described indicia band marked has font, is provided with described leads in the middle of the adjacent font; Described mark mark label marked has dimension information and the locating information of described weld seam and the placement location of indicia band of described weld seam;
Described camera bag system comprises filter, intensifying screen, camera bag, film, anti-backpiece screen; Described film is put into described camera bag, and the pros and cons of the identification marking of the rear indicia film pre-exposure at the edge of described camera bag and described camera bag and opening towards;
Described exposure system comprises radiographic source machine, adapter, stem pipe, shakes source tray, dragline mechanism; The two ends of described stem pipe are respectively link and exposure top; Described radiographic source machine is connected in the link of described stem pipe through described adapter; The described source tray that shakes is controlled described dragline mechanism and is driven the exposure top that radioactive source in the described radiographic source machine moves to described stem pipe, and the locking of additional elastic force;
Described auxiliary accessory system comprises transparent sticking obedient plate of magnetic and the bracelet that can realize quick Continuous pressing device for stereo-pattern function; The transparent sticking obedient plate of described magnetic be with described mark mark label, plumbous chi, image quality indicator are sticking be posted on above;
Described data computation system comprises the actual measurement of weld seam data, the measurement and the calculating of exposure data; The actual measurement of described weld seam data comprises the actual measurement of weld width and to the actual measurement of the actual coincidence situation of the weld seam detection technology formulated before working; The measurement of described exposure data comprises the calculating to the imminent ray detection transillumination time with calculating, and is divided into experiment and calculates to draw with formula and calculate;
In the described operational phase; At the scene described mark mark label is pasted on the described commissure of the outside surface of described pipeline path; Place described indicia band according to the display position of described mark mark label; Described camera bag system is fixed in the relevant position of described pipeline path outer wall according to mark mark label display position and covers described weld inspection zone; Adopt double-walled list shadow exposure method or double-walled slur exposure method, move described radiographic source to exposure station place and accomplish exposure, thereby on described film, form images;
In the described post-processing stages, comprise described film is treated to egative film and egative film is evaluated in the darkroom.
11. the ray detection method of weld seam under the nuclear power station radioactive environment according to claim 10 is characterized in that: the font of described indicia band marked is evenly arranged for digital and described font.
12. according to the ray detection method of weld seam under claim 10 or the 11 described nuclear power station radioactive environments, it is characterized in that: described film is rectangle or has the face that matches with the outside surface of described pipeline path.
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Address after: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Applicant after: CGNPC Inspection Technology Co., Ltd. Applicant after: Suzhou Nuclear Power Research Institute Co., Ltd. Applicant after: China General Nuclear Power Corporation Address before: Futian District, Shenzhen City Road 518000 Guangdong Province Science & Technology Building 1001, 1506 Applicant before: CGNPC Inspection Technology Co., Ltd. Applicant before: Suzhou Nuclear Power Research Institute Co., Ltd. Applicant before: China Guangdong Nuclear Power Group Co., Ltd. |
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