CN109799289B - Flaw detection device suitable for large-area or batch steel plate flaw detection - Google Patents
Flaw detection device suitable for large-area or batch steel plate flaw detection Download PDFInfo
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- CN109799289B CN109799289B CN201910171108.XA CN201910171108A CN109799289B CN 109799289 B CN109799289 B CN 109799289B CN 201910171108 A CN201910171108 A CN 201910171108A CN 109799289 B CN109799289 B CN 109799289B
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Abstract
The invention discloses a flaw detection device suitable for large-area or batch steel plate flaw detection, which comprises: the flaw detector comprises a flaw detector body, a probe connected with the flaw detector body, a spray head for spraying flaw detection media to a detection area on a steel plate, a liquid flow channel for conveying the flaw detection media in a media storage tank to the spray head, and a handheld rod connected with the probe. The nozzle sprays detection medium to the steel plate area below the probe, the handheld rod is held tightly to detect along with the spraying, the ultrasonic wave emitted by the probe penetrates through the medium layer on the steel plate and penetrates into the depth of the steel plate, a reflected wave is formed when the ultrasonic wave meets the defect of the steel plate or the bottom surface of the steel plate, and the reflected wave forms a pulse waveform on the flaw detector body. The duck does not need to squat on the plate and move forward, so that the labor intensity can be reduced; the flaw detection quality is ensured, and the flaw detection quality is prevented from being influenced by fatigue.
Description
Technical Field
The invention relates to the field of steel plate flaw detection, in particular to a flaw detection device suitable for large-area or batch steel plate flaw detection.
Background
The ultrasonic flaw detection method is a method for detecting the defect of a part by utilizing the characteristic that ultrasonic energy penetrates into the deep part of a metal material and is reflected at the edge of a section when the ultrasonic energy enters another section from the section.
The ultrasonic flaw detector is a portable industrial nondestructive flaw detector, and consists of an instrument body and an ultrasonic probe. The method can be used for quickly, conveniently, nondestructively and accurately detecting, positioning, evaluating and diagnosing various defects (cracks, looseness, air holes, inclusions and the like) in the workpiece.
Because some enterprises need steel plate flaw detection occasionally, when steel plate flaw detection is carried out, a traditional flaw detection mode is usually maintained, namely a shoulder and back instrument body, and a hand-held ultrasonic probe is used for carrying out operation by a duck step on a plate in a squatting mode. When the flaw detection is performed on a large-area steel plate or a certain batch of flaw detection is performed, the operation is time-consuming and labor-consuming, the labor intensity is high, the efficiency is low, the probe of the flaw detection instrument is held by a hand for a long time, the probe of the flaw detection instrument is squat on the plate, the ergonomic theory that the duck steps are not in accordance with a specific working mode is not met, and irreversible damage can be caused to the bodies of related operators.
In view of the above, it is necessary to design a flaw detection apparatus suitable for flaw detection of large-area or batch steel plates to solve the above problems.
Disclosure of Invention
The invention provides a flaw detection device suitable for large-area or batch steel plate flaw detection, wherein a handheld rod and a spray head are arranged on a probe, an operator grasps the handheld rod to detect along with spraying, and does not need to squat on a plate to move forward, so that the labor intensity can be reduced; the flaw detection quality is ensured, and the flaw detection quality is prevented from being influenced by fatigue.
The technical scheme for realizing the purpose of the invention is as follows:
a flaw detection apparatus suitable for flaw detection of large-area or batch steel plates, comprising: the flaw detector comprises a flaw detector body and a probe connected with the flaw detector body, and is characterized by further comprising a spray head, a liquid flow channel, a handheld rod, a probe seat, a shell and a traction assembly;
the probe is arranged in the probe seat, the probe seat is arranged in a hollow cavity in the shell, a moving bulge is arranged on the side surface of the probe seat, a moving groove is formed in the shell on the inner side of the hollow cavity, and the moving bulge is embedded into the moving groove;
the handheld rod is connected with the shell, the liquid flow channel conveys the flaw detection medium in the medium storage tank to the spray head, and the spray head sprays the flaw detection medium to the area on the steel plate being detected; the distance between the spray head and the steel plate is less than or equal to 1 cm;
a rubber ring is embedded in the bottom surface of the probe seat, the distance from the lower end surface of the rubber ring to the probe seat is 2-4 mm, the lower end surface of the rubber ring is in contact with a steel plate, and a temporary storage area is formed between the rubber ring and the steel plate; the probe and the spray head are positioned in the temporary storage area;
the traction assembly is arranged on the handheld rod, the power output end of the traction assembly is connected to the probe seat, the traction assembly drives the probe seat to move up and down in the hollow cavity, and when the probe seat moves, the movable protrusion moves up and down in the movable groove;
the upper end of the probe seat is provided with a compression spring, the upper end of the compression spring is connected to the shell, and the compression spring is in a compression state.
The nozzle sprays detection medium to the steel plate area below the probe, the handheld rod is held tightly to detect along with the spraying, the ultrasonic wave emitted by the probe penetrates through the medium layer on the steel plate and penetrates into the depth of the steel plate, a reflected wave is formed when the ultrasonic wave meets the defect of the steel plate or the bottom surface of the steel plate, and the reflected wave forms a pulse waveform on the flaw detector body. The duck does not need to squat on the plate and move forward, so that the labor intensity can be reduced; the flaw detection quality is ensured, and the flaw detection quality is prevented from being influenced by fatigue.
As a further improvement of the invention, the flaw detection medium is water. When detecting a flaw, the steel plate is usually soaked in a flaw detection medium, or a thick layer of flaw detection medium is coated on the steel plate, so an ultrasonic coupling agent for preventing the steel plate from rusting or corroding, such as lubricating oil or engine oil, is usually adopted as the flaw detection medium commonly used for detecting the steel plate, and because water can cause the steel plate to rust, the low-cost water cannot be usually selected as the flaw detection medium. The invention can select water as the flaw detection medium, because the distance between the spray head and the steel plate is not more than 1cm, a thin layer of water is formed on the surface of the steel plate after the spray head sprays water. When the probe leaves the water spraying area, water in the water spraying area can be evaporated for a short time at room temperature, and the steel plate cannot be rusted.
The invention adopts the probe seat to connect the handheld rod, the probe and the spray head into a whole, thereby being more convenient to use.
The nozzle sprays the flaw detection medium to the temporary storage area, and a thin flaw detection medium layer is formed in the temporary storage area, so that the flaw detection accuracy is improved.
Along with the removal of probe seat, the temporary storage area that forms constantly changes between rubber circle and the steel sheet, and the shower nozzle constantly sprays water to the region between rubber circle and the steel sheet, guarantees that the medium of detecting a flaw that the shower nozzle spun can not sprayed the region beyond the temporary storage area all the time, can guarantee the degree of accuracy of detecting a flaw, again furthest's reduction the quantity of medium of detecting a flaw.
As a further improvement of the invention, the probe seat is provided with a fluid channel which communicates the liquid flow channel with the spray head. The invention aims to arrange the fluid channel on the probe seat, on one hand, the connection between the liquid flow channel and the probe seat is convenient, and on the other hand, the random arrangement of the spray head is realized by the random direction of the liquid flow channel, so that the position of the spray head is not limited, and the spray head can be used for spraying a detection area in real time.
As a further improvement of the invention, the spraying direction of the spray head faces to the right lower part of the probe. The spraying direction of the invention faces to the right lower part of the probe, and the invention can accurately spray water to the detection area of the steel plate, and has better use effect.
As a further improvement of the invention, the liquid flow passage is a rubber tube. Because the rubber tube has the advantages of good flexibility, light weight, good flexibility and bending resistance, the invention selects the liquid flow passage as the rubber tube, and can achieve the purposes of convenient installation and good use effect.
As a further development of the invention, the media storage tank is fixed to the hand-held lever. The medium storage tank is fixed on the handheld rod through the clamp, the medium storage tank and the spray head are communicated through the rubber pipe during working, two ends of the rubber pipe are connected in a sleeved mode, and the medium storage tank is filled with flaw detection media.
Drawings
FIG. 1 is a schematic view of a flaw detection apparatus suitable for flaw detection of large-area or batch steel plates;
FIG. 2 is a product diagram of a flaw detector for a steel plate;
fig. 3 is an enlarged view of a portion a in fig. 2.
In the figure, 1, a hand-held rod; 2. a media storage tank; 3. a valve; 4. a transition joint; 5. a probe base; 6. flaw detection media; 7. a rubber ring; 8. A probe; 9. a data line; 10. a flaw detector body; 11. a liquid flow passage; 12. a housing; 121. a moving groove; 122. a limiting structure; 13. A compression spring; 14. A traction assembly; 15. A steel plate; 16. the projection is moved.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.
Example 1:
the embodiment discloses a detection device suitable for large tracts of land or batch steel sheet are detected a flaw, includes: the flaw detector comprises a flaw detector body 10, a probe 8 connected with the flaw detector body 10, a spray head for spraying a flaw detection medium 6 to a detection area on a steel plate, a liquid flow passage 11 for conveying the flaw detection medium 6 in a medium storage tank 2 to the spray head, and a handheld rod 1 connected with the probe 8. The nozzle sprays detection medium to the steel plate area below the probe 8, the handheld rod 1 is held tightly to detect along with the spraying, the ultrasonic waves emitted by the probe 8 penetrate through the medium layer on the steel plate and penetrate into the depth of the steel plate, reflected waves are formed when the ultrasonic waves encounter defects of the steel plate or the bottom surface of the steel plate, and the reflected waves form pulse waveforms on the flaw detector body 10. According to the embodiment, the duck does not need to crouch on the plate to move forward, so that the labor intensity can be reduced; the flaw detection quality is ensured, and the flaw detection quality is prevented from being influenced by fatigue.
It should be noted that the hand-held lever 1 of the present embodiment may have any structure, and any structure that can realize the hand-held function may be used in the present embodiment without affecting the flaw detection of the steel plate.
In order to ensure the accuracy of flaw detection, the pressure sprayed by the spray head and the flowing speed of the flaw detection medium 6 can be set by themselves in this embodiment, and in principle, it is only necessary to ensure that the detection area of the probe 8 has an enough layer of the flaw detection medium 6, and the normal detection of the probe 8 is not affected. Similarly, the spray head of the embodiment can be in any form, and the connection mode of the spray head and the flaw detection seat is not limited as long as the detection medium can be comprehensively sprayed on the area being detected on the steel plate.
Generally, steel plates are usually soaked in the flaw detection medium 6 during flaw detection, or a thick layer of the flaw detection medium 6 is coated on the steel plates, so an ultrasonic coupling agent for preventing the steel plates from rusting or corroding, such as lubricating oil or machine oil, is often adopted as the flaw detection medium 6 commonly used for steel plate flaw detection, and because water can cause the steel plates to rust, the low-cost water cannot be generally selected as the flaw detection medium 6.
The flaw detection device of the embodiment can select water as the flaw detection medium 6, and the water can be selected as the flaw detection medium in the embodiment because the distance between the spray head and the steel plate is not more than 1cm, and a thin layer of water is formed on the surface of the steel plate after the spray head sprays water. When the probe leaves the water spraying area, water in the water spraying area can be evaporated for a short time at room temperature, and the steel plate cannot be rusted.
Example 2:
on the basis of the scheme disclosed in embodiment 1, the present embodiment discloses a structure for connecting a handheld rod 1, a probe 8 and a spray head.
As shown in figure 1, the hand-held rod 1 is connected with the probe 8 through the probe seat 5, the probe 8 is embedded in the probe seat 5, and the spray head is arranged on the probe seat 5. In the embodiment, the probe seat 5 is adopted to connect the handheld rod 1, the probe 8 and the spray head into a whole, so that the use is more convenient.
In order to ensure that the area being detected on the steel plate is completely covered by the flaw detection medium 6, a temporary storage area for storing the flaw detection medium 6 is formed between the probe base 5 and the steel plate, the probe 8 and the spray head are positioned in the temporary storage area, the spray head sprays water to the temporary storage area, and the probe 8 detects flaws on the steel plate in the temporary storage area. The nozzle of the embodiment sprays the flaw detection medium 6 to the temporary storage area, and a thin flaw detection medium 6 layer is formed in the temporary storage area, so that the flaw detection accuracy is improved.
Note that the probe 8 of the present embodiment needs to be in contact with the flaw detection medium 6 to perform flaw detection of a steel sheet more favorably. In the present embodiment, a layer of the flaw detection medium 6 is filled between the probe 8 and the steel plate, and the probe 8 is in contact with the flaw detection medium 6 stored in the temporary storage area.
In order to construct a temporary storage area, the rubber ring 7 is embedded in the bottom surface of the probe base 5, the bottom of the rubber ring 7 extends out of the probe base 5, the bottom surface of the rubber ring 7 is in contact with a steel plate, and the temporary storage area is formed between the rubber ring 7 and the steel plate. Along with the movement of the probe seat 5, a temporary storage area formed between the rubber ring 7 and the steel plate is changed continuously, and the spray head sprays water to an area between the rubber ring 7 and the steel plate continuously, so that the flaw detection medium 6 sprayed by the spray head can not be sprayed to an area outside the temporary storage area all the time, the flaw detection accuracy can be ensured, and the using amount of the flaw detection medium 6 can be reduced to the maximum extent. Usually, the distance that the rubber ring 7 stretches out of the probe seat 5 is 2 mm-4 mm. The rubber ring 7 also seals the area between the steel plate and the probe holder 5.
The probe holder 5 of this embodiment is provided with a fluid passage for communicating the liquid flow path 11 with the head. In the embodiment, the fluid channel is arranged on the probe base 5, on one hand, the connection between the liquid flow channel 11 and the probe base 5 is facilitated, and on the other hand, the random arrangement of the spray head is realized by the random direction of the liquid flow channel 11, so that the position of the spray head is not limited, and the real-time spraying of the detection area can be realized.
Example 3:
on the basis of the solutions disclosed in embodiments 1 and 2, this embodiment discloses the structure of the head and the medium storage tank 2.
In actual use, the spray direction of the spray head is directed directly below the probe 8. The injection direction of this embodiment is towards probe 8 under, can be accurate to the detection zone water spray of steel sheet, the result of use is better.
Preferably, the liquid flow path 11 is a hose. Because the rubber tube has the advantages of good flexibility, light weight, good flexibility and bending resistance, the liquid flow channel 11 is selected as the rubber tube in the embodiment, and the purposes of convenient installation and good use effect can be achieved.
For ease of use, the media storage tank 2 is secured to the hand-held wand 1. On the medium storage jar 2 of this embodiment is fixed in handheld pole 1 through the clamp, the during operation medium storage jar 2 and shower nozzle pass through the rubber tube intercommunication, and the rubber tube both ends are all connected for the cover income formula, fill up in medium storage jar 2 and detect a flaw medium 6.
The probe seat 5 is welded with the limiting structure 122 into a whole as required after machining is completed, and the handheld rod 1 is connected with the limiting structure 122 through a bolt. The rubber tube passes through transition joint 4 and is connected with probe seat 5, and transition joint 4 passes through Rc1/4 threaded connection with probe seat 5, and probe 8 is from supreme free inlaying in the centre bore of probe seat 5 down, and medium storage jar 2 is fixed in on handheld pole 1 through the clamp.
The during operation rubber tube is connected transition joint 4 and medium storage jar 2, and both ends are all for the box-in connection, and medium storage jar 2 is filled with the medium 6 of detecting a flaw (the steel sheet is detected a flaw and is the liquid water that can use ordinary quality of water), controls actual flow through valve 3 on the medium storage jar 2, and data line 9 both ends are quick change connector formula and connect, and coupling probe 8 and flaw detector body 10 are after filling into rubber circle 7 in probe base 5 lower extreme "O" inslot, can carry out the operation of detecting a flaw. The rubber ring 7 of the present embodiment is preferably a wear-resistant silicone ring. The purpose of arranging the rubber ring 7 at the lower end of the probe seat 5 is to ensure that media are filled between the probe 8 and an object to be detected (a steel plate) so as to be beneficial to detecting.
Example 4:
on the basis of the solutions disclosed in embodiment 1, embodiment 2 and embodiment 3, the present embodiment discloses a connection structure of the hand-held lever 1 and the probe holder 5.
Referring to a product drawing of the steel plate flaw detection device shown in fig. 2, as shown in an enlarged view of a part a shown in fig. 3, a cavity for mounting a probe 8 is formed in the middle of a probe base 5, the probe 8 is placed in the cavity, the probe base 5 is further provided with an annular groove surrounding the cavity, a rubber ring 7 is fixed in the annular groove, the rubber ring 7 is in contact with a steel plate, a temporary storage area is formed between the rubber ring 7 and the steel plate, and a nozzle sprays a detection medium in the temporary storage area. When the steel plate flaw detection device works, the bottom surface of the rubber ring 7 is in contact with a steel plate, and the probe 8 is in contact with the flaw detection medium 6.
The probe seat 5 is arranged in the shell 12, the shell 12 is provided with a hollow cavity, the probe seat 5 is arranged in the hollow cavity, the bottom of the shell 12 is provided with a plurality of rolling wheels, and the rolling wheels are positioned on the outer side of the hollow cavity; the side of the probe seat 5 is provided with a moving bulge 16, the inner wall of the hollow cavity is provided with a moving groove 121, and the moving bulge 16 is embedded into the moving groove 121. The steel plate flaw detection device further comprises a pushing mechanism, the pushing mechanism provides power for the moving protrusion 16, the moving protrusion 16 reciprocates along the moving groove 121, and the probe base 5 moves up and down relative to the shell 12.
One end of the hand-held rod 1 is hinged with the side surface of the shell 12. In order to facilitate the movement of the flaw detection device and the working convenience of operators, the handheld rod 1 is hinged with the shell 12 to adapt to operators with various heights. Of course, in order to ensure the normal detection of the probe 8, a limiting structure 122 is further disposed between the handheld rod 1 and the housing 12 in this embodiment, the limiting structure 122 is fixed on the housing 12, and the limiting structure 122 semi-encloses the end of the handheld rod 1 hinged to the housing 12, so as to limit the rotation angle of the handheld rod 1.
In order to ensure that the probe base 5 can be lifted to the highest position (i.e. the moving protrusion 16 is located at the highest point of the moving groove 121), the steel plate flaw detection apparatus of the present embodiment further includes a pulling assembly 14, and the probe base 5 is pulled upward from the housing 12 by the pulling assembly 14. A compression spring 13 is further arranged between the probe seat 5 and the shell 12, when the probe seat 5 is lifted to the highest position, the compression spring 13 is compressed, when the moving protrusion 16 moves downwards along the moving groove 121, the compression spring 13 gradually extends until the moving protrusion 16 moves to the lowest position, and the compression spring 13 is in a compressed state. In this embodiment, the compression amount of the compression spring 13 is controlled to about 5 mm.
The compression spring 13 is arranged between the top surface of the mounting seat of the probe 8 and the shell 12, the compression spring 13 is always in a compressed state, and the traction assembly 14 is connected with the probe seat 5; the compression spring 13 pushes the probe seat 5 downwards, the moving bulge 16 abuts against the moving groove 121, and the bottom surface of the probe seat 5 is in contact with a steel plate; the traction assembly 14 lifts the probe seat 5 upwards, and the bottom surface of the probe seat 5 is higher than that of the shell 12; the mounting seat of the probe 8 moves up and down in the hollow cavity under the combined action of the traction assembly 14 and the compression spring 13.
In order to improve the safety and be more suitable for practical use, the handheld rod 1 controls the rotation angle through the limiting structure 122. The handheld rod 1 is matched with the limiting structure 122 for use, so that large-range flaw detection of operators is greatly facilitated.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A flaw detection apparatus suitable for flaw detection of large-area or batch steel plates, comprising: the flaw detector comprises a flaw detector body and a probe connected with the flaw detector body, and is characterized by further comprising a spray head, a liquid flow channel, a handheld rod, a probe seat, a shell and a traction assembly;
the probe is arranged in the probe seat, the probe seat is arranged in a hollow cavity in the shell, a moving bulge is arranged on the side surface of the probe seat, a moving groove is formed in the shell on the inner side of the hollow cavity, and the moving bulge is embedded into the moving groove;
the handheld rod is connected with the shell, the liquid flow channel conveys the flaw detection medium in the medium storage tank to the spray head, and the spray head sprays the flaw detection medium to the area on the steel plate being detected; the distance between the spray head and the steel plate is less than or equal to 1 cm;
a rubber ring is embedded in the bottom surface of the probe seat, the distance from the lower end surface of the rubber ring to the probe seat is 2-4 mm, the lower end surface of the rubber ring is in contact with a steel plate, and a temporary storage area is formed between the rubber ring and the steel plate; the probe and the spray head are positioned in the temporary storage area;
the traction assembly is arranged on the handheld rod, the power output end of the traction assembly is connected to the probe seat, the traction assembly drives the probe seat to move up and down in the hollow cavity, and when the probe seat moves, the movable protrusion moves up and down in the movable groove;
the upper end of the probe seat is provided with a compression spring, the upper end of the compression spring is connected to the shell, and the compression spring is in a compression state.
2. The flaw detection apparatus according to claim 1, wherein the flaw detection medium is water.
3. The flaw detection apparatus of claim 1, wherein the probe base defines a fluid passage communicating the fluid flow path with the spray head.
4. The flaw detection apparatus according to claim 1, wherein a jetting direction of the head is directed directly below the probe.
5. The flaw detection apparatus according to claim 3, wherein the liquid flow path is a hose.
6. The flaw detection apparatus of claim 1, wherein the medium storage tank is fixed to a hand-held rod.
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| CN201910171108.XA CN109799289B (en) | 2019-03-07 | 2019-03-07 | Flaw detection device suitable for large-area or batch steel plate flaw detection |
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| CN201910171108.XA CN109799289B (en) | 2019-03-07 | 2019-03-07 | Flaw detection device suitable for large-area or batch steel plate flaw detection |
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| CN2600816Y (en) * | 2003-02-14 | 2004-01-21 | 缪庆芝 | Transverse wave water spray probe |
| CN201051093Y (en) * | 2007-06-15 | 2008-04-23 | 舞阳钢铁有限责任公司 | A device for detecting steel plate damage based on fixed water pole impulse reflection |
| CN201666892U (en) * | 2010-03-29 | 2010-12-08 | 江阴润源机械有限公司 | Ultrasonic inspection apparatus |
| CN101907608B (en) * | 2010-07-02 | 2012-05-02 | 浙江大学 | Adaptive overflow type seal shoe for ultrasonic probe |
| CN202101975U (en) * | 2011-05-16 | 2012-01-04 | 吉林省天合风电设备有限公司 | Eight-channel ultrasonic steel plate fault detection vehicle |
| CN103293229B (en) * | 2013-06-07 | 2015-08-26 | 中核核电运行管理有限公司 | A kind of ultrasonic probe clamp |
| CN103604867B (en) * | 2013-10-14 | 2016-05-04 | 广西南南铝加工有限公司 | Aluminium alloy flat bloom ultrasonic detection device and method of detection |
| CN204575595U (en) * | 2015-04-20 | 2015-08-19 | 中国兵器科学研究院宁波分院 | Hand roller formula steel-plate ultrasound wave inspection car |
| CN106872584B (en) * | 2017-01-12 | 2020-02-07 | 国家电网公司 | Ultrasonic coupling device and ultrasonic coupling method for ultrasonic detection of composite insulator |
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