CN103630559B - A kind of pipeline weld joint nondestructive inspection system - Google Patents
A kind of pipeline weld joint nondestructive inspection system Download PDFInfo
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- CN103630559B CN103630559B CN201310699538.1A CN201310699538A CN103630559B CN 103630559 B CN103630559 B CN 103630559B CN 201310699538 A CN201310699538 A CN 201310699538A CN 103630559 B CN103630559 B CN 103630559B
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Abstract
The invention discloses a kind of pipeline weld joint nondestructive inspection system, belong to technical field of nondestructive inspection.The present invention includes delivery system, mounting system, locus adjustment System and defectoscope equipped system, delivery system is used for region to be detected to pipeline for pipeline weld joint nondestructive inspection system delivery, mounting system is arranged in the top of delivery system carrying platform, locus adjustment System is fixed in the support platform in mounting system, defectoscope equipped system is fixed on the termination cross bar in the adjustment System of locus, defectoscope equipped system comprises transmission case, power wheel, transmission gear ring, first limit switch, second limit switch and x-ray flaw detector, current rectifying and wave filtering circuit in x-ray flaw detector, inverter circuit, step-up transformer, X-ray tube earth terminal is separately connected and ground connection successively.The invention enables x-ray flaw detector arbitrarily can not jump electricity, improve the automaticity that nondestructive examination detects, thus improve work efficiency.
Description
Technical field
The present invention relates to technical field of nondestructive inspection, more particularly, relate to a kind of pipeline weld joint nondestructive inspection system.
Background technology
It is under the prerequisite do not damaged or do not affect detected object usability that nondestructive examination detects, and utilizes the principle art such as the sound of object, optical, electrical magnetic to carry out the detection technique of defect, chemistry, physical parameter to material, part, equipment.Non-Destructive Testing is the requisite effective tool of industrial development, and reflect a national Industry Development Level to a certain extent, its importance of Non-Destructive Testing gains public acceptance, mainly contains radioscopy, Ultrasonic Detection, Magnetic testing and liquid penetration examination four kinds.
Radioscopy refers to and penetrates test specimen with X ray or gamma-rays, and using film as the lossless detection method of the equipment of recorded information, the method is the most basic, a kind of most widely used nondestructive test method.Its principle is: radial energy penetrates the material that naked eyes cannot penetrate and makes light reaching the film, when X ray or gamma-rays irradiate film, the same with ordinary ray, the silver halide in film emulsion layer can be made to produce latent image, because the material of different densities is different to the absorption coefficient of ray, be irradiated to film transmitted intensity everywhere and also will produce difference, just can according to the egative film after darkroom disposal everywhere density difference differentiate defect.
At present, x-ray flaw detector is divided into portable type and portable two large classes by structure.For small volume and the workpiece of conveniently moving, mobile X-ray detection apparatus can be selected, but the heavy or high large equipment to workpiece, mobile inconvenient, portable X-ray detection apparatus can only be used, and common portable X-ray detection apparatus need be determined according to detection thing to be generally placed on a platform by the placing height of x-ray flaw detector, and come padded with the on-the-spot thing such as batten, fragment of brick, use extremely inconvenient.In addition, x-ray flaw detector of the prior art due to grounding design unreasonable, when causing that in use miscellaneous equipment or staff encounter ground wire, very easily cause x-ray flaw detector to jump electricity, thus affect the normal use of x-ray flaw detector.
Pass through patent retrieval, China Patent No. ZL201020692622.2, the applying date: on Dec 31st, 2010, invention and created name is: X-ray pipeline crawl device, this application case relates to a kind of X-ray pipeline crawl device, described crawl device comprises body and X ray head, and X ray head is positioned at the front end of body and is connected with body; Be provided with radiation sensor, controller, power supply and drive motor in described body, radiation sensor is connected with controller, and controller is connected with the X ray head of body front end with drive motor; Described power supply is connected with X ray head with controller, drive motor respectively by wire.The labour intensity that this application case in use detects work is large, inefficiency, and the Adjustment precision of X ray head is lower, thus affects Detection job.
Summary of the invention
1. invent the technical matters that will solve
To the object of the invention is to overcome in prior art nondestructive examination detect in x-ray flaw detector easily jump electricity, and ineffective problem, provide a kind of pipeline weld joint nondestructive inspection system, adopt technical scheme of the present invention, the automaticity that nondestructive examination detects can be improved, and greatly improve detection efficiency.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of pipeline weld joint nondestructive inspection system of the present invention, comprise delivery system, mounting system, locus adjustment System and defectoscope equipped system, wherein: described delivery system comprises carrier loader, carrying platform, driving wheel, sucker cylinder, sucker and carrier loader control gear, the bottom of described carrier loader is provided with four driving wheels, the periphery of this driving wheel is provided with the sucker cylinder perpendicular to driving wheel outline, the described sucker cylinder other end is fixed with sucker, the top of described carrier loader is provided with carrying platform, the upper surface of this carrying platform is rectangle plane, described carrier loader control gear comprises power supply, controller, drive motor, wireless signal receiver and wireless signal transmitter, power supply is connected with controller, the input end of controller is connected with the output terminal of wireless signal receiver, the output terminal of controller is connected with drive motor, control signal is transmitted to wireless signal receiver by described wireless signal transmitter, and controller receives the control signal of wireless signal receiver transmission and controls drive motor work, described mounting system comprises the first insertion tube, second insertion tube, 3rd insertion tube, locking column, fine setting screw rod, cylindrical central sleeve, outer sleeve, supporting seat, support platform, groove, fixed bar and fixing briquetting, this mounting system is positioned at the top of carrying platform, three supporting legs are installed bottom described outer sleeve, every bar supporting leg is by the first insertion tube, second insertion tube and the 3rd insertion tube are socketed formation successively, locking column is provided with between first insertion tube and the second insertion tube, also locking column is provided with between second insertion tube and the 3rd insertion tube, wherein the bottom of a supporting leg is provided with fine setting screw rod, three above-mentioned supporting legs are all fixedly connected on the upper surface of carrying platform by tight locking button, described outer sleeve inside is provided with cylindrical central sleeve, the outer wall of this cylindrical central sleeve offers mounting hole along its axis direction, outer sleeve sidewall offers lock hole, outer sleeve and cylindrical central sleeve are fixed by stop pin, this stop pin is through above-mentioned mounting hole and lock hole, the top of above-mentioned cylindrical central sleeve is fixed with supporting seat, this supporting seat is provided with support platform, the upper surface of support platform is provided with groove, fixed bar and fixing briquetting, described groove is positioned at the center position of support platform, and described fixed bar and fixing briquetting are respectively provided with two, described locus adjustment System comprises pedestal, rotating cylinder, support cylinder, fixing vertical rod, cant beam, counterweight mass, extensible canopy and termination cross bar, described pedestal is fixed in support platform by above-mentioned fixed bar, and pedestal is fixed in support platform by bolt by fixing briquetting in support platform further, the upper surface of pedestal is vertically fixed in described fixing vertical rod, this fixing vertical rod is provided with rotating cylinder and cant beam, described rotating cylinder is provided with the support cylinder vertically arranged, the tailpiece of the piston rod supporting cylinder is connected on cant beam, one end of described cant beam is connected with counterweight mass, the other end is fixed with extensible canopy, and the epitaxial end of described extensible canopy is provided with termination cross bar, described defectoscope equipped system comprises transmission case, power wheel, transmission gear ring, first limit switch, second limit switch and x-ray flaw detector, described transmission case is secured by bolts on the cross bar of termination, motor is comprised in this transmission case, speed reduction unit and power wheel, motor is connected to the input end of speed reduction unit, the output terminal of speed reduction unit is connected to power wheel, described transmission gear ring is meshed with power wheel, this transmission gear ring is arc structure, the two ends of described transmission gear ring are separately installed with the first limit switch, second limit switch, near one end of the second limit switch, x-ray flaw detector is installed, described x-ray flaw detector comprises current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube and feedback circuit, described current rectifying and wave filtering circuit, inverter circuit, step-up transformer are connected successively with X-ray tube, described X-ray tube is connected by feedback circuit with between inverter circuit, earth terminal respective in above-mentioned current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube is connected successively, and passes through ground connection.
Further, described x-ray flaw detector comprises control manipulatable end and x ray generator, and described current rectifying and wave filtering circuit and inverter circuit are positioned at and control manipulatable end inside, and described step-up transformer and X-ray tube are positioned at x ray generator inside; The shell independent grounding of above-mentioned control manipulatable end.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
A kind of pipeline weld joint nondestructive inspection system of the present invention, by cooperatively interacting of delivery system, mounting system, locus adjustment System and defectoscope equipped system, substantially increases the automaticity that nondestructive examination detects, thus improves work efficiency; And in the present invention in the current rectifying and wave filtering circuit of x-ray flaw detector, inverter circuit, step-up transformer, X-ray tube respective earth terminal be connected successively, and pass through ground connection, make x-ray flaw detector arbitrarily can not jump electricity, solve the difficult problem that in prior art, x-ray flaw detector detection efficiency is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of delivery system in the present invention;
Fig. 2 is the circuit frame figure of carrier loader control gear in the present invention;
Fig. 3 is the structural representation of medium-height trestle system of the present invention;
Fig. 4 is the structural representation of spatial location adjustment System of the present invention;
Fig. 5 is the structural representation of defectoscope equipped system in the present invention;
Fig. 6 is the internal circuit frame diagram of x-ray flaw detector in the present invention.
Label declaration in schematic diagram:
1, carrier loader; 2, carrying platform; 301, driving wheel; 302, sucker cylinder; 303, sucker; 401, the first insertion tube; 402, the second insertion tube; 403, the 3rd insertion tube; 404, locking column; 405, screw rod is finely tuned; 406, cylindrical central sleeve; 407, outer sleeve; 51, supporting seat; 52, support platform; 53, groove; 54, fixed bar; 55, fixing briquetting; 61, pedestal; 62, rotating cylinder; 63, cylinder is supported; 64, fixing vertical rod; 65, cant beam; 66, counterweight mass; 71, extensible canopy; 72; Termination cross bar; 8, transmission case; 81, power wheel; 9, transmission gear ring; 91, the first limit switch; 92, the second limit switch; 10, x-ray flaw detector.
Embodiment
For understanding content of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
Composition graphs 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, a kind of pipeline weld joint nondestructive inspection system in the present embodiment, is made up of delivery system, mounting system, locus adjustment System and defectoscope equipped system etc.Delivery system in the present embodiment comprises carrier loader 1, carrying platform 2, driving wheel 301, sucker cylinder 302, sucker 303 and carrier loader control gear, the bottom of described carrier loader 1 is provided with four driving wheels 301, the periphery of this driving wheel 301 is provided with the sucker cylinder 302 perpendicular to driving wheel 301 outline, described sucker cylinder 302 other end is fixed with sucker 303, the top of described carrier loader 1 is provided with carrying platform 2, the upper surface of this carrying platform 2 is rectangle plane (as shown in Figure 1), in the periphery of driving wheel 301, sucker 303 is installed in the present embodiment, be conducive to whole delivery system to walk at pipeline internal to be detected, improve the precision of its travelling control.Carrier loader control gear comprises power supply, controller, drive motor, wireless signal receiver and wireless signal transmitter (as shown in Figure 2), power supply is connected with controller, the input end of controller is connected with the output terminal of wireless signal receiver, the output terminal of controller is connected with drive motor, control signal is transmitted to wireless signal receiver by described wireless signal transmitter, and controller receives the control signal of wireless signal receiver transmission and controls drive motor work.
Mounting system in the present embodiment comprises the first insertion tube 401, second insertion tube 402, 3rd insertion tube 403, locking column 404, fine setting screw rod 405, cylindrical central sleeve 406, outer sleeve 407, supporting seat 51, support platform 52, groove 53, fixed bar 54 and fixing briquetting 55(are as shown in Figure 3), this mounting system is positioned at the top of carrying platform 2, three supporting legs are installed bottom described outer sleeve 407, every bar supporting leg is by the first insertion tube 401, second insertion tube 402 and the 3rd insertion tube 403 are socketed formation successively, locking column 404 is provided with between first insertion tube 401 and the second insertion tube 402, also locking column 404 is provided with between second insertion tube 402 and the 3rd insertion tube 403, wherein the bottom of a supporting leg is provided with fine setting screw rod 405, three above-mentioned supporting legs are all fixedly connected on the upper surface of carrying platform 2 by tight locking button.Outer sleeve 407 inside is provided with cylindrical central sleeve 406, the outer wall of this cylindrical central sleeve 406 offers mounting hole along its axis direction, outer sleeve 407 sidewall offers lock hole, outer sleeve 407 and cylindrical central sleeve 406 are fixed by stop pin, this stop pin is through above-mentioned mounting hole and lock hole, the top of above-mentioned cylindrical central sleeve 406 is fixed with supporting seat 51, this supporting seat 51 is provided with support platform 52, the upper surface of support platform 52 is provided with groove 53, fixed bar 54 and fixing briquetting 55, described groove 53 is positioned at the center position of support platform 52, described fixed bar 54 and fixing briquetting 55 are respectively provided with two.In the present embodiment at the upper surface of support platform 52 by groove 53, fixed bar 54, the common fixed space position adjustment of fixing briquetting 55, such that the steadiness of locus adjustment System is good, Adjustment precision is high.
Locus adjustment System in the present embodiment comprises pedestal 61, rotating cylinder 62, supports cylinder 63, fixes vertical rod 64, cant beam 65, counterweight mass 66, extensible canopy 71 and termination cross bar 72(as shown in Figure 4), described pedestal 61 is fixed in support platform 52 by above-mentioned fixed bar 54, and pedestal 61 is fixed in support platform 52 by bolt by fixing briquetting 55 in support platform 52 further.The upper surface of pedestal 61 is vertically fixed in described fixing vertical rod 64, this fixing vertical rod 64 is provided with rotating cylinder 62 and cant beam 65, rotating cylinder 62 and cant beam 65 all can rotate around fixing vertical rod 64, described rotating cylinder 62 is provided with the support cylinder 63 vertically arranged, the tailpiece of the piston rod supporting cylinder 63 is connected on cant beam 65, one end of described cant beam 65 is connected with counterweight mass 66, and the other end is fixed with extensible canopy 71, and the epitaxial end of described extensible canopy 71 is provided with termination cross bar 72.Support the short transverse of cylinder 63 and the horizontal direction of extensible canopy 71 by adjustment in the present embodiment, the locus adjusting defectoscope equipped system can be realized.
Defectoscope equipped system in the present embodiment comprises transmission case 8, power wheel 81, transmission gear ring 9, first limit switch 91, second limit switch 92 and x-ray flaw detector 10(are as shown in Figure 5), described transmission case 8 is secured by bolts on termination cross bar 72, motor is comprised in this transmission case 8, speed reduction unit and power wheel 81, motor is connected to the input end of speed reduction unit, the output terminal of speed reduction unit is connected to power wheel 81, described transmission gear ring 9 is meshed with power wheel 81, this transmission gear ring 9 is arc structure, the two ends of described transmission gear ring 9 are separately installed with the first limit switch 91, second limit switch 92, near one end of the second limit switch 92, x-ray flaw detector 10 is installed, when the either end of transmission gear ring 9 is near transmission case 8, first limit switch 91 or the second limit switch 92 can control power wheel 81 and stop operating, thus avoid transmission gear ring 9 and power wheel 81 to depart from transmission.Described x-ray flaw detector 10 comprises current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube and feedback circuit, described current rectifying and wave filtering circuit, inverter circuit, step-up transformer are connected successively with X-ray tube, described X-ray tube is connected by feedback circuit with between inverter circuit, earth terminal respective in above-mentioned current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube is connected successively, and by ground connection (as shown in Figure 6).X-ray flaw detector 10 in the present embodiment comprises control manipulatable end and x ray generator, described current rectifying and wave filtering circuit and inverter circuit are positioned at and control manipulatable end inside, described step-up transformer and X-ray tube are positioned at x ray generator inside, the shell independent grounding of above-mentioned control manipulatable end, makes x-ray flaw detector arbitrarily can not jump electricity.
The using method of a kind of pipeline weld joint nondestructive inspection system of the present invention, the steps include:
Step one, delivery system is positioned over and treats in the pipeline of carrying out flaw detection, four driving wheels 301 contact with inner-walls of duct, at the upper surface mounting bracket system of carrying platform 2, wherein: three supporting legs bottom outer sleeve 407 are all fixedly connected on the upper surface of carrying platform 2 by tight locking button, by the fine setting screw rod 405 of the collapsing length and a supporting leg bottom that adjust three supporting legs, support platform 52 is positioned on surface level, and adjusts the height of support platform 52 by the relative position adjusting outer sleeve 407 and cylindrical central sleeve 406;
Step 2, be installed in support platform 52 by locus adjustment System, wherein: pedestal 61 is fixed in support platform 52 by fixed bar 54, pedestal 61 is fixed in support platform 52 by bolt by fixing briquetting 55 in support platform 52 further;
Step 3, be installed on defectoscope equipped system in the adjustment System of locus termination cross bar 72 on, and in defectoscope equipped system, x-ray flaw detector 10 is installed, described x-ray flaw detector 10 comprises current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube and feedback circuit, earth terminal respective in current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube is connected successively, and passes through ground connection;
Step 4, by delivery system wireless signal transmitter control carrier loader 1 walk, control signal is transmitted to wireless signal receiver by wireless signal transmitter, controller receives the control signal of wireless signal receiver transmission and controls drive motor work, drive motor drives driving wheel 301 to rotate, by region to be detected to pipeline for whole pipeline weld joint nondestructive inspection system delivery;
Step 5, by the support cylinder 63 in adjustment locus adjustment System and extensible canopy 71, make the positive butt welded seam of x-ray flaw detector 10, again by driving power wheel 81, making power wheel 81 drive transmission gear ring 9 to rotate, thus making x-ray flaw detector 10 carry out arc nondestructive examination.Wherein, the adjustment of x-ray flaw detector 10 is consistent with adjustment mode of the prior art, does not repeat them here.
The present invention is cooperatively interacted by delivery system, mounting system, locus adjustment System and defectoscope equipped system, substantially increases the automaticity that nondestructive examination detects, thus improves work efficiency.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (1)
1. a pipeline weld joint nondestructive inspection system, is characterized in that: be made up of delivery system, mounting system, locus adjustment System and defectoscope equipped system, wherein:
Described delivery system comprises carrier loader (1), carrying platform (2), driving wheel (301), sucker cylinder (302), sucker (303) and carrier loader control gear, the bottom of described carrier loader (1) is provided with four driving wheels (301), the periphery of this driving wheel (301) is provided with the sucker cylinder (302) perpendicular to driving wheel (301) outline, described sucker cylinder (302) other end is fixed with sucker (303), the top of described carrier loader (1) is provided with carrying platform (2), the upper surface of this carrying platform (2) is rectangle plane, described carrier loader control gear comprises power supply, controller, drive motor, wireless signal receiver and wireless signal transmitter, power supply is connected with controller, the input end of controller is connected with the output terminal of wireless signal receiver, the output terminal of controller is connected with drive motor, control signal is transmitted to wireless signal receiver by described wireless signal transmitter, and controller receives the control signal of wireless signal receiver transmission and controls drive motor work,
Described mounting system comprises the first insertion tube (401), second insertion tube (402), 3rd insertion tube (403), locking column (404), fine setting screw rod (405), cylindrical central sleeve (406), outer sleeve (407), supporting seat (51), support platform (52), groove (53), fixed bar (54) and fixing briquetting (55), this mounting system is positioned at the top of carrying platform (2), described outer sleeve (407) bottom is provided with three supporting legs, and every bar supporting leg is by the first insertion tube (401), second insertion tube (402) and the 3rd insertion tube (403) are socketed formation successively, locking column (404) is provided with between first insertion tube (401) and the second insertion tube (402), also locking column (404) is provided with between second insertion tube (402) and the 3rd insertion tube (403), wherein the bottom of a supporting leg is provided with fine setting screw rod (405), and three above-mentioned supporting legs are all fixedly connected on the upper surface of carrying platform (2) by tight locking button, described outer sleeve (407) inside is provided with cylindrical central sleeve (406), the outer wall of this cylindrical central sleeve (406) offers mounting hole along its axis direction, outer sleeve (407) sidewall offers lock hole, outer sleeve (407) and cylindrical central sleeve (406) are fixed by stop pin, this stop pin is through above-mentioned mounting hole and lock hole, the top of above-mentioned cylindrical central sleeve (406) is fixed with supporting seat (51), this supporting seat (51) is provided with support platform (52), the upper surface of support platform (52) is provided with groove (53), fixed bar (54) and fixing briquetting (55), described groove (53) is positioned at the center position of support platform (52), described fixed bar (54) and fixing briquetting (55) are respectively provided with two,
Described locus adjustment System comprises pedestal (61), rotating cylinder (62), supports cylinder (63), fixes vertical rod (64), cant beam (65), counterweight mass (66), extensible canopy (71) and termination cross bar (72), described pedestal (61) is fixed in support platform (52) by above-mentioned fixed bar (54), and pedestal (61) is fixed in support platform (52) by bolt by fixing briquetting (55) in support platform (52) further, the upper surface of pedestal (61) is vertically fixed in described fixing vertical rod (64), this fixing vertical rod (64) is provided with rotating cylinder (62) and cant beam (65), rotating cylinder (62) and cant beam (65) all can rotate around fixing vertical rod (64), described rotating cylinder (62) is provided with the support cylinder (63) vertically arranged, the tailpiece of the piston rod supporting cylinder (63) is connected on cant beam (65), one end of described cant beam (65) is connected with counterweight mass (66), the other end is fixed with extensible canopy (71), the epitaxial end of described extensible canopy (71) is provided with termination cross bar (72),
Described defectoscope equipped system comprises transmission case (8), power wheel (81), transmission gear ring (9), first limit switch (91), second limit switch (92) and x-ray flaw detector (10), described transmission case (8) is secured by bolts on termination cross bar (72), this transmission case comprises motor in (8), speed reduction unit and power wheel (81), motor is connected to the input end of speed reduction unit, the output terminal of speed reduction unit is connected to power wheel (81), described transmission gear ring (9) is meshed with power wheel (81), this transmission gear ring (9) is arc structure, the two ends of described transmission gear ring (9) are separately installed with the first limit switch (91), second limit switch (92), near one end of the second limit switch (92), x-ray flaw detector (10) is installed, when transmission gear ring (9) either end near transmission case (8) time, first limit switch (91) or the second limit switch (92) can control power wheel (81) and stop operating, described x-ray flaw detector (10) comprises current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube and feedback circuit, described current rectifying and wave filtering circuit, inverter circuit, step-up transformer are connected successively with X-ray tube, described X-ray tube is connected by feedback circuit with between inverter circuit, earth terminal respective in above-mentioned current rectifying and wave filtering circuit, inverter circuit, step-up transformer, X-ray tube is connected successively, and passes through ground connection, above-mentioned x-ray flaw detector (10) comprises control manipulatable end and x ray generator, and described current rectifying and wave filtering circuit and inverter circuit are positioned at and control manipulatable end inside, the shell independent grounding of above-mentioned control manipulatable end.
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| CN105159295B (en) * | 2015-09-08 | 2017-12-22 | 云南电网有限责任公司电力科学研究院 | A kind of X ray Non-Destructive Testing platform control method for coordinating |
| CN105709342B (en) * | 2016-01-21 | 2019-02-26 | 南宁科伦新技术有限公司 | A kind of excitation of X-rays light power diagnosis and treatment deep tumor system |
| CN112304980B (en) * | 2020-10-28 | 2023-05-16 | 西安热工研究院有限公司 | Directional X-ray flaw detector supporting device for nondestructive testing of boiler tube panel welded joint and using method thereof |
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