CN107068217A - HTGR heat exchanger tube weld seam x-ray inspection method - Google Patents
HTGR heat exchanger tube weld seam x-ray inspection method Download PDFInfo
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- CN107068217A CN107068217A CN201710404696.8A CN201710404696A CN107068217A CN 107068217 A CN107068217 A CN 107068217A CN 201710404696 A CN201710404696 A CN 201710404696A CN 107068217 A CN107068217 A CN 107068217A
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/002—Detection of leaks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- X-Ray Techniques (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
The invention discloses a kind of HTGR heat exchanger tube weld seam x-ray inspection method, this method comprises the following steps, step 1：Holding-and-aligning frock is clamped in the stretching direction of slide rail in the precalculated position of heat exchanger tube, regulation holding-and-aligning frock；Step 2, X-ray head is arranged in the head retainer ring of holding-and-aligning frock；Step 3, the luffing angle of the height of regulation X-ray head and head retainer ring so that the radiation angle covering weld seam of X-ray；Step 4, relative position of the adjusting slider on slide rail, it is ensured that geometric unsharpness is within a predetermined range；Step 5, image quality indicator and signature number are attached in heat exchange pipe surface, step 6, film and back of the body screen are placed on heat exchanger tube and film is fixed between clamping bar；Step 7, start-up operation console, is manipulated by platform and sets exposure parameter；Step 8, operating console controls high pressure generator to be powered to X-ray head according to exposure parameter, is exposed imaging job.
Description
Technical field
The present invention relates to HTGR welding quality detection method, and in particular to a kind of HTGR heat exchanger tube weld seam
X-ray inspection method.
Background technology
HTGR is the generally acknowledged current new nuclear reactor of security highest of international nuclear energy circle, and the thermal efficiency is high, is
System is simple, widely used, is most to promise to be one of advanced heap-type of adaptation future source of energy market safety and economic needs, quilt
Referred to as Generation Ⅳ.Wherein, the specific requirement for temperature gas cooled reactor steam generator heat exchanger tube is extremely harsh, causes
Processing and manufacturing is extremely difficult；HTGR evaporator heat exchange unit is about 10 meters, and only half meter of diameter is internal as described in tens
Heat exchanger tube is constituted in uneven regular distribution.
For one long ten meters or so of heat exchanger tube, often there is the welding point of multiple butt welding thereon, and it is every
Individual welding point is required for carrying out weld seam ray detection after different processes, is needed after such as welding at radiographic inspection welding seam, heat
Also need to radiographic inspection welding seam after reason, each heat exchange unit includes 35 heat exchanger tubes, each steam generator there are 19 or more
Multiple heat exchange units, so, in order to prepare the heat exchanger tube of one steam generator of assembling, weld seam irradiating and detecting need of work is repeated
Thousands of or even up to ten thousand times；
Moreover, in a heat exchange unit, adjacent heat exchange tubes arrangement is compact, and operating space is narrow and small, and each welding node is also
The transillumination (two angles are mutually in 90 °) of at least two angles need to be carried out, because heat exchanger tube needs vertical placement, many ray detections
Need of work carries out operation in high-altitude higher from the ground, and some heat exchanger tubes to be detected are surrounded by other heat exchanger tubes, heat exchanger tube
Between space it is smaller, conventional portable X-ray detectoscope and common method of detection can not meet onsite application requirement；
In addition, commissure does not have any place for fixing X-ray production apparatus and film, exchange heat pipe structure is not allowed to cause yet
Any influence and destruction；
And the operating efficiency of existing x-ray inspection method, which also needs to greatly improve, to be possible to meet above-mentioned special
Use requirement, simultaneously as the welding precision of exchange heat pipe requires harsh, it is desirable to must assure that Jiao when performing flaw detection operation
Pre-provisioning request is met away from conditions such as, geometric unsharpness, high standard is reached.
For these reasons, the present inventor has made intensive studies to existing x-ray inspection method, to design one
Plant the HTGR heat exchanger tube weld seam x-ray inspection method that can solve the problem that above mentioned problem.
The content of the invention
In order to overcome above mentioned problem, present inventor has performed studying with keen determination, a kind of HTGR heat exchanger tube weldering is designed
X-ray inspection method is stitched, the method for detection is realized by special defectoscope, the defectoscope includes high pressure generator, behaviour
Make console, X-ray head, cooling system and holding-and-aligning frock；Wherein, the cooling system include coolant recirculation pump,
Tank for coolant and circulation pipe；The circulation pipe passes through X-ray head, in the presence of circulating pump, and cooling medium flowing speed is fast,
The heat in X-ray head can be taken away in time, so that X-ray head can continuously work；The high pressure generator
Powered by high-tension cable to X-ray head, so that the very little that X-ray head can make, only includes high pressure cable seat, cathode modulation
Several parts such as silk, vacuum (-tight) housing, plate target and protective cover, and the X-ray head can be placed in holding-and-aligning frock,
The distance between X-ray head and heat exchanger tube are adjusted by holding-and-aligning frock, then pass through the sliding block band in holding-and-aligning frock
X-ray head and be moved to progress X-ray irradiation on the diverse location of heat exchanger tube or different heat exchanger tubes, so as to complete this hair
It is bright.
In particular it is object of the present invention to a kind of HTGR heat exchanger tube weld seam x-ray inspection method is provided, should
Method comprises the following steps：
Step 1, holding-and-aligning frock 5 is clamped in the precalculated position of heat exchanger tube 6；
Step 2, X-ray head 3 is arranged in the head retainer ring 55 of holding-and-aligning frock 5；
Step 3, the luffing angle of the height of regulation X-ray head 3 and head retainer ring 55 so that the radiation angle of X-ray
Cover weld seam；
Step 4, relative position of the adjusting slider 54 on slide rail 51, it is ensured that geometric unsharpness is within a predetermined range；
Step 5, image quality indicator and signature number are attached in heat exchange pipe surface,
Step 6, film and back of the body screen are placed on heat exchanger tube and film is fixed between clamping bar 56；
Step 7, start-up operation console 2, is manipulated by platform 2 and sets exposure parameter；
Step 8, operating console 2 controls high pressure generator 1 to be powered to X-ray head 3 according to exposure parameter, is exposed
Imaging job.
Wherein, the holding-and-aligning frock 5 includes slide rail 51,
Described one end of slide rail 51 is provided with clamping part 52 and gripping block 53,
The sliding block 54 that can be slided along slide rail is additionally provided with the slide rail 51；
The clamping part 52 clamps heat exchanger tube 6 together with gripping block 53；
The head retainer ring 55 for laying X-ray head 3 is provided with the sliding block 54.
Wherein, the clamping part 52 is L-shaped solid member, and the arc gap for accommodating heat exchanger tube is offered on its bending section,
The gripping block 53 can rotate relative to slide rail, and then heat exchanger tube 6 can be fixedly clamped at the arc gap；
Preferably, the film being vertically arranged fixes clamping bar 56 on the clamping part 52, the film fixes clamping bar
56 clamp film and back of the body screen together with heat exchanger tube.
Wherein, the cooling system includes coolant recirculation pump 41, tank for coolant 42, circulation pipe 43 and air cooling fan 44；
Wherein, the circulation pipe 43 passes through X-ray head 3,
The air cooling fan is arranged near tank for coolant 42, is cooled by air cooling fan to tank for coolant 42；
Preferably, the coolant recirculation pump 41, tank for coolant 42 and circulation pipe 43 constitute closed-cycle system.
Wherein, the X-ray head 3 includes high pressure cable seat 31, cathode filament 32, vacuum (-tight) housing 33, plate target 34 and protection
Cover 35；
Wherein, cathode filament 32 is located in vacuum (-tight) housing 33,
The high pressure that high pressure generator 1 is produced is transmitted by high-tension cable and is divided into two-way, wherein negative high voltage all the way is connected on
Negative electrode, plus earth forms high voltage electric field；Another road is applied on cathode filament 32 so that the electronics that cathode filament 32 is produced
Accelerating impact plate target 34 produces bremsstrahlung under high voltage electric field effect, produces X-ray.
Wherein, the high pressure generator 1 is powered by high-tension cable 11 to X-ray head 3.
Wherein, circulation pipe 43 passes through the protective cover 35, and nearby passes through from plate target 34, by the circulation pipe 43 and
Its internal coolant takes away the heat in X-ray head 3；
The part circulation pipe 43 being preferably located in protective cover 35 is made up of cathode copper.
Wherein, the high-tension cable two ends are both provided with high-voltage plug,
A high-voltage plug on the high-tension cable is embedded into the high pressure cable seat 31, and is in contact with negative electrode；
High pressure resistant silicone grease layer is scribbled on high pressure cable seat 31.
Wherein, it is additionally provided with the operating console 2 in exposure parameter memory module, the exposure parameter memory module
Be stored with multigroup exposure parameter being called.
Wherein, exposure image operation is imaged using double-walled slur imaging mode in this method.
The present invention have the advantage that including：
(1) the X-ray head used in the HTGR heat exchanger tube weld seam x-ray inspection method provided according to the present invention
Small volume, is easy to movement, X easily can be carried out on heat exchanger tube diverse location and various heat exchange pipe and penetrate detection, the scope of application
Extensively；
(2) equipment used in the HTGR heat exchanger tube weld seam x-ray inspection method provided according to the present invention has
Cooling system, the system is water-cooling system, the heat in X-ray head can be taken away in time so that X-ray head can be held
Continuous work, it is not necessary to 1:1 interval is rested, so as to improve the operating efficiency of this method；
(3) the HTGR heat exchanger tube weld seam x-ray inspection method provided according to the present invention has supporting clamping pair
Position frock, flexibly and easily can be placed on heat exchanger tube, and be easy to focusing, be easy to regulation heat exchanger tube and X-ray head it
Between distance, easy to use, efficiency high.
Brief description of the drawings
Fig. 1 shows the HTGR heat exchanger tube weld seam x-ray inspection method according to a kind of preferred embodiment of the invention
The middle X-ray detectoscope overall structure diagram used；
Fig. 2 shows the HTGR heat exchanger tube weld seam x-ray inspection method according to a kind of preferred embodiment of the invention
The middle X-ray handpiece structure schematic diagram used；
Fig. 3 shows the HTGR heat exchanger tube weld seam x-ray inspection method according to a kind of preferred embodiment of the invention
The middle holding-and-aligning tool structure schematic diagram used；
Fig. 4 is shown in the HTGR heat exchanger tube weld seam x-ray inspection side according to a kind of preferred embodiment of the invention
Beam side view；
Fig. 5 shows the HTGR heat exchanger tube weld seam x-ray inspection method according to a kind of preferred embodiment of the invention
Middle beam top view；
Fig. 6 shows that the X-ray obtained according to HTGR heat exchanger tube weld seam x-ray inspection method of the present invention is imaged egative film
Figure.
Drawing reference numeral explanation：
1- high pressure generators
11- high-tension cables
2- operating consoles
3-X ray heads
31- high pressures cable seat
32- cathode filaments
33- vacuum (-tight) housings
34- plate targets
35- protective covers
41- coolant recirculation pumps
42- tank for coolants
43- circulation pipes
5- holding-and-aligning frocks
51- slide rails
52- clamping parts
53- gripping blocks
54- sliding blocks
55- head retainer rings
56- films fix clamping bar
57- bolts
58- screwing wrenchs
59- jackscrews
6- heat exchanger tubes
7-X rays
8- radiation angles
Embodiment
Below by drawings and examples, the present invention is described in more detail.Illustrated by these, the features of the present invention
It will be become more apparent from clearly with advantage.
Special word " exemplary " is meant " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.Although each of embodiment is shown in the drawings
In terms of kind, but unless otherwise indicated, it is not necessary to accompanying drawing drawn to scale.
The HTGR heat exchanger tube weld seam x-ray inspection method provided according to the present invention, this method is by special
What X-ray detectoscope as shown in Figure 1 was carried out, the X-ray detectoscope includes high pressure generator 1, operating console 2, X and penetrated
Line head 3, cooling system and holding-and-aligning frock 5.
The HTGR heat exchanger tube weld seam x-ray inspection method that the present invention is provided comprises the following steps,
Step 1, holding-and-aligning frock 5 is clamped in slide rail in the precalculated position of heat exchanger tube 6, regulation holding-and-aligning frock 5
51 stretching direction；Flaw detection operation of other heat exchanger tubes to the heat exchanger tube is avoided to impact；Wherein, holding-and-aligning frock is passed through
Clamping part 52 and gripping block 53 on 5 clamp heat exchanger tube, are specifically that heat exchanger tube 6 is fixedly clamped at the arc gap, from
And realize being fixedly clamped between heat exchanger tube and holding-and-aligning frock 5；
Step 2, X-ray head 3 is arranged in the head retainer ring 55 of holding-and-aligning frock 5；Adjust height and ray
Jackscrew is locked after beam angle degree；
Step 3, the luffing angle of the height of regulation X-ray head 3 and head retainer ring 55 so that the radiation angle of X-ray 7
8 covering weld seams；The beam radiation angle of X-ray head 3 is 45 °, using center as baseline, respectively there is 22.5 ° of fan-shaped spoke to both sides
Region is penetrated, as shown in Figures 4 and 5, it is ensured that the whole weld seam of covering, i.e. region/radiation angle 8 of X-ray irradiation covers whole weld seam,
Region between two X-rays that reference 8 is referred in Fig. 5 is radiation angle 8；Ray beam center should to frock lateral deviation monoclinic phase
Angle ensure that X-ray tube ray beam center is directed at heat exchanger tube axis, while the luffing angle of adjustable X-ray head adjusts weldering
It is sewn on the image openings of sizes of egative film, it is ensured that it is conducive to the display of defect；
Step 4, relative position of the adjusting slider 54 on slide rail 51, it is ensured that geometric unsharpness is within a predetermined range；Adjust
Save sliding block ensures that its focal length meets the requirement of geometric unsharpness in the position of slide rail, it is determined that after fast lock on locked sliding block
Tight device；
Step 5, image quality indicator and signature number are attached in heat exchange pipe surface,
Step 6, film and back of the body screen are placed on heat exchanger tube and film is fixed between clamping bar 56；Match somebody with somebody by the interference in its gap
Close to ensure that the position of film is fixed；
Step 7, start-up operation console 2, is manipulated by platform 2 and sets exposure parameter；
Step 8, operating console 2 controls high pressure generator 1 to be powered to X-ray head 3 according to exposure parameter, is exposed
Imaging job.
Preferably, the order in this method between multiple steps can be adjusted, and such as the ordinal relation between step 3,4,5 can
Arbitrarily to be set according to actual conditions.
Preferably, before start-up operation console 2, or start when, cooling system voluntarily starts, coolant recirculation pump and
Air cooling starting fan works, cooling X-ray head 3.
Preferably, exposure image operation is imaged using double-walled slur elliptic imaging mode in this method.
Heretofore described image quality indicator is the device for the radiographic sensitivity for determining radiograph, is shown according on egative film
The image of the image quality indicator shown, it can be determined that the quality of film image, and transillumination technology, film darkroom disposal situation can be evaluated, lacked
Fall into detectability etc..Image quality indicator is using the identical or material similar to ray absorption properties is manufactured with examined workpiece.Various pictures
Matter meter devises oneself specific structure and detail view, the method for defining the measure radiographic sensitivity of oneself.
The signature number is numbered for the numeral of writing, it is therefore preferable to two kinds of " 0 " and " 1 ", for distinguishing each heat exchanger tube two
The transillumination of individual angle, the information etc. such as other pipes number is stamped by print signal lamp.
Preferably, as shown in fig. 1, the cooling system includes coolant recirculation pump 41, tank for coolant 42 and circulation pipe
43；
The circulation pipe 43 passes through X-ray head 3,
The coolant recirculation pump 41, tank for coolant 42 and circulation pipe 43 constitute closed-cycle system, its internal cooling
Liquid is quickly flowed, and can undergo phase transition, and heats are absorbed so as to a large amount of, and by the heat of absorption from X-ray head
In take out of, coolant total amount is not lost in the process, it is preferable that heretofore described coolant be distilled water.
The heat in X-ray head 3 can be taken away in time by above-mentioned cooling system so that X-ray head 3 can continue
Work；
The high pressure generator 1 is powered by high-tension cable to 11X rays head 3, and the high-tension cable gives 11 quality
It is relatively light, reduce the gravity acted on ray head 3 as far as possible.
In one preferred embodiment, as shown in fig. 1, the cooling system 4 also includes air cooling fan 44,
The air cooling fan is arranged near tank for coolant 42, is cooled by air cooling fan to tank for coolant 42, so that
Obtain the heat brought out from X-ray head and can quickly overflow and dissipate in atmosphere, it is ensured that the temperature of whole cooling system is in safety
In temperature range.
In one preferred embodiment, operating console 2 is electrically connected with high pressure generator 1, is occurred in the high pressure
Integrated all control circuits, the control instruction that the control circuit is sent according to operating console 2 in the integrated power supply on device top
(exposure parameter) execution/control exposure operation.
Regulation/control button is provided with the operating console 2；
Preferably, the operating console 2 can adjust/control voltage, electric current and time for exposure, it is preferable that in the behaviour
Make on console 2 while equipped with corresponding alarm mark lamp.
It is connected on the operating console 2 with integrated power supply, preferably integrated power supply input is 380V power supplys, input electricity
Source is conveyed to coolant recirculation pump 41, air cooling fan 44 and high pressure respectively after the modes such as inversion, copped wave, rectification are post-processed
Raw device 1, and it is manipulated by the working condition of the control of platform 2 coolant recirculation pump 41, air cooling fan 44 and high pressure generator 1.
In one preferred embodiment, as shown in fig. 1, it is additionally provided with exposure parameter on the operating console 2
Be stored with multigroup exposure parameter being called in memory module, the exposure parameter memory module.
Preferably, the exposure parameter memory module is dismountable storage chip, can select corresponding as needed
Chip, transfers exposure parameter from chip, and the working condition of the line defectoscope is controlled according to exposure parameter.
Preferably, the exposure parameter memory module can also be a memory space in computer system, not only
Exposure parameter can be therefrom transferred, the defectoscope can also be stored and answer used exposure parameter, in order to subsequently transfer.
In one preferred embodiment, the high pressure generator includes high-tension transformer, voltage-regulating system, electric current
A few part compositions of regulating system, copped wave inversion system, overvoltage crowbar system, current foldback circuit system, cooling system.Its
Injection transformer oil carries out high-voltage isulation around mesohigh transformer, and other protection circuits are placed in modulation power source, signal feedback
Point is led on the outside of casing to be attached by snap joint, it is ensured that signal transmission is reliable；
Preferably, the coolant recirculation pump and tank for coolant, institute are laid on the cabinet exterior of high pressure generator outer surface
State air cooling fan to be also disposed on high pressure generator cabinet exterior, so that high pressure generator and coolant recirculation pump can one
With mobile so that equipment unitary construction is more succinct, using more convenient.
Preferably, high pressure described herein refers to voltage of the voltage in 130kV or so, in order to ensure system it is long when
Between trouble free service, preferably actual high voltage be 110kV-120kV.
In one preferred embodiment, X-ray head 3 include high pressure cable seat 31, cathode filament 32, vacuum (-tight) housing 33,
Plate target 34, protective cover 35 and negative electrode；Wherein, cathode filament 32 is located in vacuum (-tight) housing 33, is fixed on negative electrode, high pressure generator
1 high pressure produced is transmitted by high-tension cable and is divided into two-way, wherein negative high voltage all the way is connected on negative electrode, plus earth is formed
High voltage electric field；Another road is applied on cathode filament 32 so that the electronics that cathode filament 32 is produced adds under high voltage electric field effect
Speed hits plate target 34 and produces bremsstrahlung, produces X-ray.
In one preferred embodiment, as shown in Figure 2, circulation pipe 43 passes through the protective cover 35, and from anode
Target 34 nearby passes through, and the heat in X-ray head 3 is taken away by the coolant of the circulation pipe 43 and its inside；
Preferably, circulation pipe 43 is made up of at least two materials, and the circulation pipe 43 in protective cover 35 is by electrolysis copper
Into so as to ensure that circulation pipe 43 can continuous firing at high temperature, it is ensured that stable heat exchange operation.
In one preferred embodiment, the focus of the X-ray head 3 is 1 × 1mm, due to being followed using closed
Ring is cooled down, therefore can be worked continuously in detection process, simultaneously because its focus is small, can select closer to focal length exchange heat pipe carry out
Ray detection, while can also meet its geometric unsharpness requirement, substantially increases detection efficiency.
In one preferred embodiment, the X-ray head is cylindrical, and a diameter of 80mm of its outer protection cover is left
The right side, its internal a diameter of 60mm of vacuum (-tight) housing or so.
In one preferred embodiment, as shown in Figure 2, the high-tension cable two ends are both provided with high-voltage plug,
So as to be convenient to quick grafting；A high-voltage plug on the high-tension cable is embedded into high pressure cable seat 31, and with the moon
Pole is in contact；
Preferably, high pressure resistant silicone grease layer is scribbled on high pressure cable seat 31.
In one preferred embodiment, as shown in Figure 3, the holding-and-aligning frock 5 includes slide rail 51,
Described one end of slide rail 51 is provided with clamping part 52 and gripping block 53,
The sliding block 54 that can be slided along slide rail is additionally provided with the slide rail 51；
The clamping part 52 clamps heat exchanger tube 6 together with gripping block 53；
The head retainer ring 55 for laying X-ray head 3 is provided with the sliding block 54.
In one preferred embodiment, as shown in Figure 3, the clamping part 52 is L-shaped solid member, in its bending section
On offer accommodate heat exchanger tube arc gap,
The gripping block 53 can rotate relative to slide rail, and then heat exchanger tube can be fixedly clamped at the arc gap；
Preferably, the internal diameter size of arc gap 0.3-1.5mm big compared with heat exchanger tube outside dimension, most preferably greater than 0.5-1.0mm, described
Arc gap enables to clamping part 2 fully to be contacted with heat exchanger tube, while being easy to clamping part 2 during detection to be conveniently placed on
On station to be detected, good firm effect is served.
Preferably, the film being vertically arranged fixes clamping bar 56 on the clamping part 52, the film fixes clamping bar
56 clamp film and back of the body screen together with heat exchanger tube.
Preferably, film is fixed clamping bar 56 and is connected by bolt with clamping part 52, the one of remote slide rail on clamping part 52
Side sets 2 films with heat exchanger tube axis parallel to fix clamping bar 56, and 2 films are fixed clamping bar and are separated by a certain distance, energy
Appropriate support force is enough provided；2 film geometrical clamp bar formation planes, the plane and heat exchanger tube are placed on by film and back of the body screen
Between, it is fixedly clamped by itself interference fit, and normally implement ray detection operation.
In one preferred embodiment, the gripping block 53 is fixed on slide rail by bearing pin, on the bearing pin
The bolt 57 for running through bearing pin and withstanding in gripping block 53 is additionally provided with, the bolt can rotate in the presence of screwing wrench 58,
And then oppress or loosen gripping block 53 so that clamping part 52 clamps heat exchanger tube 6 together with gripping block 53 or unclamps heat exchanger tube
6。
In one preferred embodiment, the size of clamping part 52 can be according to heat exchanger tube diameter to be detected and length
It is different and set respectively, to adapt to different handling situations, it can also be made by changing the size of arc gap on clamping part 52
Obtain the heat exchanger tube that clamping part 52 can adapt to Multiple Type.
In one preferred embodiment, hollow out in the middle of cuboid is carried out to slide rail 51 to design, reduce the weight of slide rail,
Avoid causing heat exchanger tube to deform because total amount is excessive；Due to the setting of slide rail 51, it is not necessary to set up support on ground or other objects,
Therefore occupy little space, simultaneously because slide rail is narrower, the influence of other heat exchanger tubes in space can also be avoided；
In one preferred embodiment, described the whole body of slide rail 51 is carved with corresponding with X-ray detectoscope head focal length
Scale, when sliding block 54 is moved on slide rail 51, sliding block 54 can be accurately determined by the reading of the high scale of slide rail 51 and existed
The distance moved on slide rail 51 and position, and then the focal length of X-ray detectoscope head is adjusted, meet quick detection and geometry is unclear
The requirement of clear degree.Preferably, by focusing and relative position so that geometric unsharpness is controlled below 0.51.This Shen
Please described in geometric unsharpness be Non-Destructive Testing, particularly Essential Terms of X-ray field of non destructive testing, its concept is determined
Justice is:The indistinctness caused by penumbra, penumbra depends on focal spot size, focal length and thickness of workpiece.So-called penumbra (soft
Shadow), exactly by light source (penetrating source) part direct projection, the shallower part of edge color in the shade of formation.
In one preferred embodiment, head retainer ring 55 is located at the side of slide rail, in annular shape, the X-ray
Head 3 is inserted vertically into the circular head retainer ring 55, and being provided with the wall of head retainer ring 55 can be to convex
The jackscrew 59 gone out, by screwing the jackscrew 59 so that jackscrew clamps X-ray head 3, so that X-ray head 3 is fixed on into machine
In head retainer ring 55, X-ray head 3 can be adjusted up and down by unclamping after the jackscrew 59, and then the irradiation area of regulation X-ray,
Meet the requirement of taking pictures under different condition.
Preferably, the head retainer ring 55 is connected by bolt with sliding block, and the bolt can rotate relative to sliding block, from
And head retainer ring 55 is suitably rotated, angle of the X-ray in pitch orientation is adjusted by rotating, that is, realizes that X is penetrated
The pitch regulation of line head, and can angle meet require after locked fixation, the pitch regulation be regulation X-ray
Irradiation zone,.
Experimental example：
To in HTGR heat exchanger tube Butt welded seam carry out x-ray inspection detection, the heat exchange pipe size be Φ 19 ×
3mm；Application drawing 1, the X-ray detectoscope shown in Fig. 2, Fig. 3 in detection process, this method comprises the following steps,
1st, holding-and-aligning frock 5 is clamped on heat exchanger tube 6, below weld seam；
2nd, X-ray head 3 is arranged in the head retainer ring 55 of holding-and-aligning frock 5；
3rd, the luffing angle of the height of regulation X-ray head 3 and head retainer ring 55 so that the radiation angle covering of X-ray
Weld seam；
4th, relative position of the adjusting slider 54 on slide rail 51, it is ensured that geometric unsharpness is below 0.51；
5th, image quality indicator and signature number are attached in heat exchange pipe surface,
6th, film and back of the body screen are placed on heat exchanger tube and film is fixed between clamping bar 56, fixed by being interference fitted；
7th, start-up operation console 2, is manipulated by platform 2 and sets exposure parameter；
8th, operating console 2 controls high pressure generator 1 to be powered to X-ray head 3 according to exposure parameter, is exposed imaging
Operation；
9th, after the imaging egative film for obtaining weld seam, rotation holding-and-aligning frock 5, the anglec of rotation is 90 degree, or will clamping pair
Position frock 5 is fixed on another weld seam and continues below the above-mentioned 2-8 of repetition.
As shown in Figure 6, show to be imaged negative map by the X-ray that the above method is obtained, the quality of the negative map is good, weld seam
Region it is oval high-visible, the welding quality of weld seam can be seen from the egative film, meet weld seam detection requirement.
Above in association with preferred embodiment the present invention is described, but these embodiments are only exemplary
, only play illustrative effect.On this basis, a variety of replacements and improvement can be carried out to the present invention, these each fall within this
In the protection domain of invention.
Claims (10)
1. a kind of HTGR heat exchanger tube weld seam x-ray inspection method, it is characterised in that this method comprises the following steps：
Step 1, holding-and-aligning frock (5) is clamped in the precalculated position of heat exchanger tube (6)；
Step 2, X-ray head (3) is arranged in the head retainer ring (55) of holding-and-aligning frock (5)；
Step 3, the luffing angle of the height of regulation X-ray head (3) and head retainer ring (55) so that the radiation angle of X-ray
Cover weld seam；
Step 4, relative position of the adjusting slider (54) on slide rail (51), it is ensured that geometric unsharpness is within a predetermined range；
Step 5, film and back of the body screen are placed on heat exchanger tube and film is fixed between clamping bar (56)；
Step 6, start-up operation console (2), are manipulated by platform (2) and set exposure parameter；
Step 7, operating console (2) controls high pressure generator (1) to be powered to X-ray head (3) according to exposure parameter, is exposed
Photoimaging operation.
2. according to the method described in claim 1, it is characterised in that
The holding-and-aligning frock (5) includes slide rail (51),
The slide rail (51) one end is provided with clamping part (52) and gripping block (53),
The sliding block (54) that can be slided along slide rail is additionally provided with the slide rail (51)；
The clamping part (52) clamps heat exchanger tube (6) together with gripping block (53)；
The head retainer ring (55) for laying X-ray head (3) is provided with the sliding block (54).
3. method according to claim 2, it is characterised in that
The clamping part (52) is L-shaped solid member, and the arc gap for accommodating heat exchanger tube is offered on its bending section,
The gripping block (53) can rotate relative to slide rail, and then heat exchanger tube (6) can be fixedly clamped at the arc gap；
Preferably, the film being vertically arranged fixes clamping bar (56) on the clamping part (52), the film fixes clamping bar
(56) film and back of the body screen are clamped together with heat exchanger tube.
4. according to the method described in claim 1, it is characterised in that
The cooling system includes coolant recirculation pump (41), tank for coolant (42), circulation pipe (43) and air cooling fan (44)；
Wherein, the circulation pipe (43) passes through X-ray head (3),
The air cooling fan is arranged near tank for coolant (42), is cooled by air cooling fan to tank for coolant (42)；
Preferably, the coolant recirculation pump (41), tank for coolant (42) and circulation pipe (43) constitute closed-cycle system.
5. according to the method described in claim 1, it is characterised in that
The X-ray head (3) includes high pressure cable seat (31), cathode filament (32), vacuum (-tight) housing (33), plate target (34) and protection
Cover (35)；
Wherein, cathode filament (32) is located in vacuum (-tight) housing (33),
The high pressure that high pressure generator (1) is produced is transmitted by high-tension cable and is divided into two-way, wherein negative high voltage all the way is connected on the moon
Pole, plus earth forms high voltage electric field；Another road is applied on cathode filament (32) so that the electricity that cathode filament (32) is produced
Son accelerating impact plate target (34) under high voltage electric field effect produces bremsstrahlung, produces X-ray.
6. method according to claim 5, it is characterised in that
The high pressure generator (1) is powered by high-tension cable (11) to X-ray head (3).
7. method according to claim 5, it is characterised in that
Circulation pipe (43) passes through the protective cover (35), and nearby passes through from plate target (34), by the circulation pipe (43) and
Its internal coolant takes away the heat in X-ray head (3)；
The circulation pipe (43) being preferably located in protective cover (35) is made up of cathode copper.
8. method according to claim 5, it is characterised in that
The high-tension cable two ends are both provided with high-voltage plug,
A high-voltage plug on the high-tension cable is embedded into the high pressure cable seat (31), and is in contact with negative electrode；
High pressure resistant silicone grease layer is scribbled on high pressure cable seat (31).
9. according to the method described in claim 1, it is characterised in that
It is additionally provided with exposure parameter memory module, the exposure parameter memory module and is stored with the operating console (2)
Multigroup exposure parameter being called.
10. according to the method described in claim 1, it is characterised in that
Exposure image operation is imaged using double-walled slur imaging mode in this method.
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