CN113267565A - Ultrasonic flaw detection device for ultra-thick-wall steel pipe - Google Patents

Ultrasonic flaw detection device for ultra-thick-wall steel pipe Download PDF

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Publication number
CN113267565A
CN113267565A CN202110706430.5A CN202110706430A CN113267565A CN 113267565 A CN113267565 A CN 113267565A CN 202110706430 A CN202110706430 A CN 202110706430A CN 113267565 A CN113267565 A CN 113267565A
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steel pipe
wafers
ultra
ultrasonic
thick
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胡才望
陆杰
高翔
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Daye Special Steel Co Ltd
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Daye Special Steel Co Ltd
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Priority to CN202110706430.5A priority Critical patent/CN113267565A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/225—Supports, positioning or alignment in moving situation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/275—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving both the sensor and the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/023—Solids
    • G01N2291/0234—Metals, e.g. steel
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/042—Wave modes
    • G01N2291/0421—Longitudinal waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/10—Number of transducers
    • G01N2291/105—Number of transducers two or more emitters, two or more receivers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2634—Surfaces cylindrical from outside
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2636—Surfaces cylindrical from inside

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Acoustics & Sound (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

The invention provides an ultrasonic flaw detection device for an ultra-thick-wall steel pipe, which comprises a probe and a swing frame, wherein the probe is arranged on the swing frame, and when the swing frame falls onto the steel pipe, the probe can be attached to the steel pipe; the probe is including a plurality of wafers, every the wafer all is connected with ultrasonic signal transmission line, every the wafer all can to launch the ultrasonic wave in the steel pipe, every the ultrasonic wave that the wafer sent gets into the refraction longitudinal wave homoenergetic of steel pipe can with the inner wall of steel pipe is tangent, and the realization is right the steel pipe is detected a flaw. The device adopts the probes which are arranged in a bidirectional way and combined in a multi-channel way, and adopts the ultrasonic refraction longitudinal wave L to detect the defects of the inner wall and the outer wall of the steel pipe, so that the defects of the inner wall and the outer wall of the steel pipe with the wall thickness and the outer diameter ratio t/D more than or equal to 0.26 are simultaneously detected, and the device is particularly suitable for the condition that the t/D (the wall thickness and the outer diameter ratio) is more than or equal to 0.26 and less than or equal to 0.311.

Description

Ultrasonic flaw detection device for ultra-thick-wall steel pipe
Technical Field
The invention relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic flaw detection device for an ultra-thick-wall steel pipe.
Background
The existing riding-horse type ultrasonic flaw detection equipment adopts the in-situ rotation of a steel pipe, and a detection trolley moves in parallel to drive an ultrasonic detection probe unit to move from one end of the steel pipe to the other end of the steel pipe, so that the ultrasonic flaw detection of the defects of the inner wall and the outer wall of the steel pipe is realized. When the steel pipe is subjected to ultrasonic flaw detection, in order to ensure that the defects on the inner wall of the steel pipe cannot be missed, incident ultrasonic waves enter the steel pipe to generate refracted transverse waves S which are tangent to the inner wall of the steel pipe, and the conventional ultrasonic flaw detection equipment can only detect the defects on the inner wall and the outer wall of the steel pipe with the wall thickness and the outer diameter ratio t/D less than 0.26.
When the ultrasonic waves obliquely enter the steel interface, the ultrasonic waves are refracted to generate transverse waves and longitudinal waves, when the ultrasonic waves obliquely enter the steel interface at the angle of 1-27 degrees, the longitudinal waves and the transverse waves exist in the steel pipe, when the incident angle is larger than 27 degrees, only the transverse waves exist in the steel pipe, and the angle of 27 degrees is the first critical angle of the organic glass and the steel interface. When the inclination angle is increased to 54 degrees, the transverse wave in the steel is not existed, and 54 degrees is called as a second critical angle. The conditions for generating transverse waves at the interface of the organic glass and the steel are as follows: the incident angle is between 27 and 54 degrees, and when t/D of the ultra-thick wall steel pipe is more than or equal to 0.26, the defect of the inner wall of the steel pipe cannot be detected. Therefore, the detection of the defect of the inner wall of the ultra-thick steel pipe can be considered only in the first critical angle. In the first critical angle, the detection sensitivity of the transverse wave is very low, the defect of the inner wall of the steel pipe cannot be adjusted at all, and only the refracted longitudinal wave can be adjusted to be tangent to the inner wall of the steel pipe, so that the defect of the inner wall has a good detection effect. However, because the transverse waves still exist in the steel pipe and the angle of the transverse waves is very small, the transverse waves have certain reflection on the inner wall of the steel pipe, certain influence is generated on the signal-to-noise ratio of longitudinal waves, and the detection of the defects of the inner wall of the ultra-thick steel pipe is influenced.
Due to the technical development of steel pipe production, the ratio t/D of the wall thickness to the outer diameter of a produced steel pipe is more than or equal to 0.26, when the ratio t/D of the wall thickness to the outer diameter of the steel pipe is more than or equal to 0.26, the refraction transverse wave S of the existing probe cannot detect the inner wall of the steel pipe to cause the defect omission of the inner wall of the steel pipe, as shown in figure 1, the inner diameter of the steel pipe is phi 63.5, the outer diameter of the steel pipe is phi 165.1, the wall thickness of the steel pipe is 50.8, the ratio of the wall thickness to the outer diameter of the steel pipe is 0.31, the incident angle of ultrasonic waves is 30 degrees, the ultrasonic waves are transmitted in the steel pipe along the S direction, the refraction transverse wave S generated when the. And the incident angle of the existing equipment can not be adjusted, and the probes with different angles can only be replaced by different wall thickness and outer diameter ratios.
In view of the above, there is a need for an ultrasonic flaw detection device for ultra-thick-wall steel pipes, which can simultaneously detect defects on the inner and outer walls of the steel pipes.
Disclosure of Invention
The invention aims to provide an ultrasonic flaw detection device for ultra-thick-wall steel pipes, which adopts a probe with bidirectional arrangement and multi-channel combination and adopts ultrasonic refraction longitudinal waves L to detect the defects of the inner wall of the steel pipe, thereby realizing the simultaneous detection of the defects of the inner wall and the outer wall of the steel pipe with the wall thickness and the outer diameter ratio t/D more than or equal to 0.26, and being particularly suitable for the condition that the t/D (the wall thickness and the outer diameter ratio) is more than or equal to 0.26 and less than or equal to 0.311.
In order to achieve the above purpose, the invention provides the following technical scheme:
an ultrasonic flaw detection device for ultra-thick-wall steel pipes comprises a probe and a swing frame, wherein the probe is mounted on the swing frame, and when the swing frame falls onto the steel pipes, the probe can be attached to the steel pipes; the probe is including a plurality of wafers, every the wafer all is connected with ultrasonic signal transmission line, every the wafer all can to launch the ultrasonic wave in the steel pipe, every the ultrasonic wave that the wafer sent gets into the refraction longitudinal wave homoenergetic of steel pipe can with the inner wall of steel pipe is tangent, and the realization is right the steel pipe is detected a flaw.
Further, in the ultrasonic flaw detection device for the ultra-thick-wall steel tube, the probe further comprises a shell and organic glass, the shell is of a box structure with an opening at the lower part, the shell comprises a top plate and four side plates, the periphery of the organic glass is respectively connected with the bottom ends of the four side plates, a plurality of wafers are adhered to the organic glass, the front surfaces of the wafers face the steel tube, damping blocks are poured on the back surfaces of the wafers, and the damping blocks are located in the shell; during operation, the lower surface of the organic glass is in contact with the steel pipe.
Further, in the ultrasonic flaw detection apparatus for an ultra-thick wall steel pipe described above, the housing is machined from metal aluminum; preferably, the damping block is formed by mixing epoxy resin, tungsten powder and a curing agent; preferably, the mass percentages of the epoxy resin, the tungsten powder and the curing agent mixed into the damping block are 65%, 25% and 10% respectively.
Further, in the ultrasonic flaw detection device for the ultra-thick-wall steel pipe, two rows of the wafers are arranged along the length direction of the organic glass, 4 wafers are uniformly arranged in each row, and the two rows of the wafers are obliquely arranged, wherein the incident angle of the ultrasonic wave emitted by one row of the wafers into the steel pipe is 8 degrees, and the incident angle of the ultrasonic wave emitted by the other row of the wafers into the steel pipe is 172 degrees; preferably, the upper surface of the organic glass is provided with two rows of grooves, the bottoms of the two rows of grooves are respectively arranged according to the inclination angles of the two rows of wafers, and the two rows of wafers are respectively stuck in the two rows of grooves.
Furthermore, in the ultrasonic flaw detection device for the ultra-thick-wall steel pipe, tungsten steel wear-resistant blocks are embedded on the lower surface of the organic glass, a plurality of tungsten steel wear-resistant blocks are arranged, and the tungsten steel wear-resistant blocks are uniformly distributed on the peripheries of the two rows of wafers.
Further, in the ultrasonic flaw detection device for the ultra-thick wall steel pipe, the lower surface of the organic glass is processed according to the outer diameter curved surface of the steel pipe; preferably, the ratio t/D of the wall thickness to the outer diameter of the ultra-thick wall steel pipe is more than or equal to 0.26; preferably, the ratio of the wall thickness to the outer diameter of the ultra-thick-wall steel pipe is 0.26-0.311.
Further, in the ultrasonic flaw detection device for the ultra-thick-wall steel pipe, a plurality of water injection holes are formed in the shell, coupling water flows to the contact surface of the organic glass and the steel pipe through the water injection holes, a water film is formed on the contact surface of the organic glass and the steel pipe, and stable coupling of ultrasonic waves and the steel pipe is achieved.
Further, in the ultrasonic flaw detection device for the ultra-thick-wall steel pipe, a through hole is formed in the middle of the swing frame, the probe can enter the through hole, and preferably, the ultrasonic flaw detection device further comprises a balance plate, the balance plate is arranged above the swing frame, and the probe and the balance plate are fixed through screws.
Further, in foretell ultra-thick wall steel pipe ultrasonic inspection device, still include a plurality of support columns, open the periphery of through-hole has a plurality of first blind holes, it has a plurality of second blind holes to open on the balance plate, one first blind hole and one the position of second blind hole corresponds, one the support column passes one get into one behind the second blind hole in the first blind hole the position cover that the support column outside and be located the balance plate top is equipped with floating pressure spring.
Furthermore, in the ultrasonic flaw detection device for the ultra-thick-wall steel pipe, two ends of the swing frame are respectively connected with a plurality of support plates, each support plate is provided with a universal tracking ball, and when the swing frame falls onto the steel pipe, the bottom ends of the universal tracking balls are in contact with the surface of the steel pipe and can roll on the surface of the steel pipe, so that good tracking with the steel pipe is realized; preferably, the number of the ball joint tracking balls is 4.
The invention discloses an ultrasonic flaw detection device for ultra-thick-wall steel pipes, which can be used for simultaneously detecting the defects of the inner wall and the outer wall of a steel pipe with the wall thickness and the outer diameter ratio t/D of more than or equal to 0.26. According to the device, the tungsten steel wear-resistant block is embedded on the arc surface at the bottom of the organic glass, so that the service life of the probe is greatly prolonged. The swing frame is provided with a plurality of universal tracking balls, and the universal tracking balls roll on the surface of the steel pipe, so that the relative stability of the ultrasonic incident angle is ensured, the constant refraction angle of the refracted longitudinal wave of the ultrasonic wave entering the steel pipe is ensured, the simultaneous detection of the defects of the inner wall and the outer wall of the steel pipe with the wall thickness and the outer diameter ratio t/D more than or equal to 0.26 is realized, and the device is particularly suitable for the condition that t/D is more than or equal to 0.26 and less than or equal to 0..
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. Wherein:
fig. 1 is a schematic diagram of ultrasonic refracted shear waves of a conventional probe in the prior art.
Fig. 2 is a schematic diagram of ultrasonic refracted longitudinal waves of a probe according to an embodiment of the invention.
Fig. 3 is a schematic front view of a probe according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a bidirectional bilateral ultrasonic refracted longitudinal wave of a probe according to an embodiment of the invention.
Fig. 6 is a schematic structural diagram of a swing frame according to an embodiment of the present invention.
FIG. 7 is a schematic view of the assembly of the support plate and the ball-and-socket joint follower according to an embodiment of the present invention.
Fig. 8 is a schematic top view of the arrangement of the wafer and the damping block on the perspex according to one embodiment of the present invention.
Description of reference numerals: 1, steel pipes; 2, a probe; 21, a wafer; 22 an ultrasonic signal transmission line; 23 a housing; 24 organic glass; 25 damping blocks; 26 tungsten steel wear resistant blocks; 27 water injection holes; 3, a swing frame; 31 a support column; 32 a floating pressure spring; 33 a balance plate; 34 a support plate; 341 transverse plate; 342 a sloping plate; 35 screws; 36 through holes; 37 bolts; 4, universal tracking ball bearing; 5 refract the longitudinal wave.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the invention, and not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present invention encompass such modifications and variations as fall within the scope of the appended claims and equivalents thereof.
In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are for convenience of description of the present invention only and do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. The terms "connected," "connected," and "disposed" as used herein are intended to be broadly construed, and may include, for example, fixed and removable connections; can be directly connected or indirectly connected through intermediate components; the connection may be a wired electrical connection, a wireless electrical connection, or a wireless communication signal connection, and a person skilled in the art can understand the specific meaning of the above terms according to specific situations.
One or more examples of the invention are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the terms "first," "second," and "third," etc. may be used interchangeably to distinguish one component from another, and are not intended to denote the position or importance of the individual components.
As shown in fig. 1 to 8, according to an embodiment of the present invention, there is provided an ultrasonic flaw detection apparatus for ultra-thick-walled steel pipes, by which defects of inner and outer walls of a steel pipe 1 having an ultra-thick wall and an outer diameter ratio t/D of not less than 0.26 can be simultaneously detected, the apparatus including a probe 2 and a rocking frame 3, wherein the probe 2 is mounted on the rocking frame 3, and when the rocking frame 3 is dropped onto the steel pipe 1, the probe 2 can be attached to the steel pipe 1; the probe 2 comprises a plurality of wafers 21, each wafer 21 is connected with an ultrasonic signal transmission line 22, the ultrasonic signal transmission lines 22 are connected with the wafers 21 in a welding mode, each wafer 21 can transmit ultrasonic waves into the steel pipe 1, the ultrasonic waves enter the steel pipe 1 to form refraction longitudinal waves 5, and as shown in fig. 5, the refraction longitudinal waves 5, transmitted by each wafer 21, of the ultrasonic waves entering the steel pipe 1 can be tangent to the inner wall of the steel pipe 1, and flaw detection on the inner wall and the outer wall of the steel pipe 1 is achieved simultaneously. When the device works, the swing frame 3 falls onto the steel pipe 1, the probe 2 is attached to the steel pipe 1, the steel pipe 1 rotates in place, the device is moved to move from one end of the steel pipe 1 to the other end of the steel pipe 1, ultrasonic waves are emitted into the steel pipe 1 through the wafer 21 in the moving process of the device, and the inner wall and the outer wall of the steel pipe 1 are subjected to flaw detection simultaneously.
Further, as shown in fig. 3, the probe 2 further includes a housing 23 and organic glass 24, the housing 23 is a box structure with an opening at the lower part, the housing 23 includes a top plate and four side plates, the periphery of the organic glass 24 is respectively connected with the bottom ends of the four side plates, the plurality of wafers 21 are adhered on the organic glass 24, the front surfaces of the wafers 21 face the steel tube 1, the back surfaces of the wafers 21 are cast with damping blocks 25, and the damping blocks 25 are located in the housing 23; when the device works, the lower surface of the organic glass 24 is in contact with the steel pipe 1. Fig. 3 is a front view showing 8 wafers, in which 4 wafers (one row) are inclined by 8 ° (not shown) so that the wafer has an incident angle of 8 ° to transmit ultrasonic waves into the steel pipe, and the other 4 wafers (one row) are inclined by 172 ° (not shown) so that the wafer has an incident angle of 172 ° to transmit ultrasonic waves into the steel pipe.
Further, the housing 23 is machined from low cost aluminum metal; the damping block 25 is formed by mixing epoxy resin, tungsten powder and a curing agent; the mass percentages of the epoxy resin, the tungsten powder and the curing agent mixed into the damping block 25 are 65%, 25% and 10% respectively. The arrangement described above allows the damping block 25 to damp the vibration of the wafer 21, stop the vibration of the wafer 21 as soon as possible, and reduce the pulse width of the ultrasonic waves, so that the damping block 25 can absorb the ultrasonic waves emitted from the wafer 21 to the back surface of the wafer 21. The damping mass 25 can act as a fixing for the wafer 21.
Further, as shown in fig. 4 and 8, two rows of the wafers 21 are arranged along the length direction of the organic glass 24, each row is uniformly provided with 4 wafers 21, the two rows of the wafers 21 are both arranged obliquely, the incident angle of the ultrasonic wave emitted by one row of the wafers 21 into the steel tube 1 is 8 °, the incident angle of the ultrasonic wave emitted by the other row of the wafers 21 into the steel tube 1 is 172 °, and the incident point of each wafer 21 emitting the ultrasonic wave into the steel tube 1 is the highest point of the vertical section of the steel tube 1. The maximum ratio t/D of the wall thickness and the outer diameter of the steel pipe 1 is 0.311, when the incident angles of the ultrasonic waves are respectively arranged according to 8 degrees and 172 degrees, the refracted longitudinal wave 5 entering the steel pipe 1 can be tangent to the inner wall of the steel pipe 1, and therefore when the steel pipe 1 with the maximum wall thickness (the ratio t/D of the wall thickness and the outer diameter is 0.311) is detected, the defects of the inner wall of the steel pipe 1 can be detected through the ultrasonic waves. The sound beam of the ultrasonic wave is diffused in the propagation process (for example, only the main sound ray of the ultrasonic wave is shown in figures 1, 2 and 5), and the coverage range is certain, so that the device is particularly suitable for detecting the steel pipe with the ratio of the wall thickness to the outer diameter of 0.26-0.311. Preferably, two rows of grooves are formed in the upper surface of the organic glass 24, the bottoms of the two rows of grooves are arranged according to the inclination angles of the two rows of wafers 21, the two rows of wafers 21 are respectively adhered to the two rows of grooves, and the arrangement can ensure that the incident angle of the ultrasonic waves is not changed. In an embodiment of the present invention, as shown in fig. 8, the probe 2 is composed of 8 wafers 21, and is arranged in two directions, the 8 wafers 21 are divided into 2 groups, the left 4 wafers 21 are located on the left half of the organic glass 24 and are located on one side of the center line of the length direction of the upper surface of the organic glass 24, the right 4 wafers 21 are located on the right half of the organic glass 24 and are located on the other side of the center line of the length direction of the upper surface of the organic glass 24, the 8 wafers 21 are uniformly arranged, and the left 4 wafers 21 are arranged at 8 °. As shown in FIG. 5, the refracted longitudinal wave 5 of the ultrasonic wave entering the steel pipe is transmitted to the right Y direction of the steel pipe 1, 4 steel pipes on the right are arranged at 172 degrees, the refracted longitudinal wave 5 of the ultrasonic wave entering the steel pipe is transmitted to the left Z direction of the steel pipe 1, and bidirectional bilateral ultrasonic detection of the steel pipe 1 is guaranteed. As shown in fig. 2, the inner diameter of the steel pipe 1 is phi 63.5, the outer diameter of the steel pipe 1 is phi 165.1, the wall thickness of the steel pipe 1 is 50.8, the ratio of the wall thickness of the steel pipe 1 to the outer diameter is 0.31, the incident angle a of the ultrasonic wave of the wafer 21 on the left is 8 °, the refracted longitudinal wave 5 of the ultrasonic wave propagates in the L direction in the steel pipe 1, and the refracted longitudinal wave 5 propagating in the L direction is tangent to the inner wall of the steel pipe 1, so that the defect of the inner wall of the steel pipe 1 can be detected.
Further, as shown in fig. 3, tungsten steel wear-resistant blocks 26 cut by wire are embedded on the lower surface of the organic glass 24 and firmly adhered by metal glue, the tungsten steel wear-resistant blocks 26 are provided with a plurality of blocks, the tungsten steel wear-resistant blocks 26 are distributed on the peripheries of the two rows of wafers, a tungsten steel wear-resistant block 26 is respectively arranged outside two ends of each of the two rows of wafers 21, and a plurality of tungsten steel wear-resistant blocks 26 are respectively arranged on two sides of each of the two rows of wafers 21 and arranged in parallel with the length direction of the organic glass 24. Because the tungsten steel is hard, the tungsten steel wear-resisting block 26 is processed in a linear cutting mode, so that the size precision can be improved. Because the tungsten steel wear-resistant block 26 is embedded on the arc surface at the bottom of the organic glass 24, the tungsten steel wear-resistant block 26 is protected in the friction process of the relative movement of the probe 2 and the steel pipe 1, and the service life of the probe 2 is greatly prolonged.
Further, the lower surface of the organic glass 24 is processed according to the outer diameter curved surface of the steel pipe 1. This arrangement enables the probe 2 to track the steel pipe 1 satisfactorily.
Further, as shown in fig. 4, a plurality of water injection holes 27 are formed in the housing 23, coupling water flows to the contact surface between the organic glass 24 and the steel pipe 1 through the water injection holes 27, and a water film is formed on the contact surface between the organic glass 24 and the steel pipe 1, so that stable coupling between the ultrasonic waves and the steel pipe 1 is realized. In an embodiment of the present invention, there are 4 water injection holes 27, coupling water uniformly flows into the detection window (the contact surface between the organic glass 24 and the steel pipe 1) through the water injection holes 27, and a water film is formed between the probe 2 and the steel pipe 1 to realize stable coupling between the ultrasonic waves and the steel pipe 1. The coupling water is injected between the probe 2 and the steel pipe 1 to isolate air, so that the probe 2 is in good contact with the surface of an object, the friction between the probe 2 and the steel pipe 1 is reduced, and the probe 2 is kept to move smoothly. The coupling water is injected between the probe 2 and the steel pipe 1, so that the ultrasonic wave can enter the steel pipe 1 conveniently, and the tiny gaps between the contact surfaces of the probe 2 and the steel pipe 1 are filled, so that the penetration of the ultrasonic wave is not influenced by the tiny air between the gaps.
Further, as shown in fig. 6, the middle part of the swing frame 3 is provided with a through hole 36, the probe 2 can enter the through hole 36, the device further comprises a balance plate 33, the balance plate 33 is arranged above the swing frame 3, and the top end of the shell 23 of the probe 2 is fixed with the balance plate 33 through a screw 35. The device can be conveniently assembled by the arrangement.
Further, as shown in fig. 4, the floating type balance device further comprises a plurality of supporting columns 31, a plurality of first blind holes are formed in the periphery of the through hole, a plurality of second blind holes are formed in the balance plate 33, the positions of one first blind hole and one second blind hole correspond to each other, one supporting column 31 penetrates through one second blind hole and then enters into one first blind hole, the plurality of supporting columns 31 are uniformly distributed around the balance plate 33, and a floating pressure spring 32 is sleeved outside the supporting column 31 and above the balance plate 33. The floating pressure spring 32 may be one if a long spring is chosen, while ensuring sufficient pressure; if a short spring is used, the floating pressure spring 32 may be two. When the swing frame 3 is dropped onto the steel pipe 1, the probe 2 mounted in the swing frame 3 is lifted by the urging force of the steel pipe 1, and the probe 2 is brought into close contact with the steel pipe 1 by the floating pressure spring 32.
Further, as shown in fig. 4, a plurality of supporting plates 34 are respectively connected to both ends of the rocking frame 3, each supporting plate 34 is provided with a universal tracking ball 4, as shown in fig. 7, the supporting plate 34 is composed of a horizontal plate 341 and a sloping plate 342, one end of the horizontal plate 341 is located above the end of the rocking frame 3 and is connected to the rocking frame 3 by a bolt 37, the other end of the horizontal plate 341 extends to the outside of the rocking frame 3, the top end of the sloping plate 342 is connected to the other end of the horizontal plate 341, the ball 4 is mounted on the sloping plate 342, preferably, the sloping plate 342 is inclined downward, the inclination angle β of the sloping plate 342 is 15 ° (the angle β between the axis of the sloping plate 342 and the axis of the horizontal plate 341 is 15 °), when the swing frame 3 falls onto the steel pipe 1, the bottom end of the universal tracking ball 4 is in contact with the surface of the steel pipe 1 and can roll on the surface of the steel pipe 1, so that good tracking with the steel pipe 1 is realized; preferably, the gimbal tracking balls 4 are provided in 4 numbers. In an embodiment of the invention, 4 universal tracking balls 4 are symmetrically arranged at two ends of a rocking frame 3 relative to two rows of wafers 21, the 4 universal tracking balls 4 on the rocking frame 3 are in contact with the surface of a steel pipe 1, the 4 universal tracking balls 4 ride on the steel pipe 1 to be stable in all directions, the universal tracking balls 4 roll on the surface of the steel pipe 1 to realize good tracking of a probe 2 and the steel pipe 1, the position of the probe 2 and the steel pipe 1 does not change when the probe moves relative to each other under the action of the universal tracking balls 4 and a floating pressure spring 32, and the relative stability of the incident angle of ultrasonic waves is ensured, so that the refraction angle of the refracted longitudinal waves 5 of the ultrasonic waves entering the steel pipe is not changed. Because the incident angle of the ultrasonic wave is relatively stable, the refracted longitudinal wave 5 generated when the ultrasonic wave enters the interface of the steel pipe 1 is also relatively stable. As shown in fig. 5, the refracted longitudinal waves 5 generated by the 8 wafers 21 arranged in the two directions are propagated in the Y, Z directions, respectively, and the two-way double-side ultrasonic inspection of the steel pipe 1 is ensured.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
the utility model provides an ultra-thick wall steel pipe ultrasonic inspection device, utilize the device can be to wall thickness and the inside and outside wall defect of steel pipe 1 that external diameter ratio t/D is greater than or equal to 0.26 detect simultaneously, the device includes probe 2 and rocking frame 3, probe 2 is installed on rocking frame 3, probe 2 is formed by 8 wafer 21 combinations, and be two-way arrangement, multichannel combination (a plurality of wafer 21 combinations), 8 wafer 21 divide into 2 groups, 4 wafer 21 on the left arrange according to 8, 4 arrange according to 172 on the right, guaranteed two-way two-sided ultrasonic inspection of steel pipe 1. According to the device, the tungsten steel wear-resistant block 26 is embedded on the arc surface at the bottom of the organic glass 24, so that the service life of the probe 2 is greatly prolonged. The rocking frame 3 is provided with a plurality of universal tracking balls 4, and the universal tracking balls 4 roll on the surface of the steel pipe 1, so that the relative stability of the ultrasonic incident angle is ensured, the refraction angle of the refracted longitudinal wave 5 when the ultrasonic enters the steel pipe is not changed, the simultaneous detection of the defects of the inner wall and the outer wall of the steel pipe with the wall thickness and the external diameter ratio t/D more than or equal to 0.26 is realized, and the method is particularly suitable for the condition that t/D is more than or equal to 0.26 and less than or equal to 0.311.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An ultrasonic flaw detection device for ultra-thick-wall steel pipes is characterized by comprising a probe and a swing frame, wherein,
the probe is arranged on the swing frame, and when the swing frame falls onto the steel pipe, the probe can be attached to the steel pipe;
the probe is including a plurality of wafers, every the wafer all is connected with ultrasonic signal transmission line, every the wafer all can to launch the ultrasonic wave in the steel pipe, every the ultrasonic wave that the wafer sent gets into the refraction longitudinal wave homoenergetic of steel pipe can with the inner wall of steel pipe is tangent, and the realization is right the steel pipe is detected a flaw.
2. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 1,
the probe further comprises a shell and organic glass, the shell is of a box body structure with an opening at the lower part, the shell comprises a top plate and four side plates, the periphery of the organic glass is respectively connected with the bottom ends of the four side plates, a plurality of wafers are adhered to the organic glass, the front surfaces of the wafers face the steel tube, damping blocks are poured on the back surfaces of the wafers, and the damping blocks are located in the shell;
during operation, the lower surface of the organic glass is in contact with the steel pipe.
3. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 2,
the shell is machined from metal aluminum;
preferably, the damping block is formed by mixing epoxy resin, tungsten powder and a curing agent;
preferably, the mass percentages of the epoxy resin, the tungsten powder and the curing agent mixed into the damping block are 65%, 25% and 10% respectively.
4. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 2,
the two rows of the wafers are arranged along the length direction of the organic glass, each row is uniformly provided with 4 wafers, the two rows of the wafers are obliquely arranged, the incident angle of the ultrasonic waves emitted into the steel pipe by one row of the wafers is 8 degrees, and the incident angle of the ultrasonic waves emitted into the steel pipe by the other row of the wafers is 172 degrees;
preferably, the upper surface of the organic glass is provided with two rows of grooves, the bottoms of the two rows of grooves are respectively arranged according to the inclination angles of the two rows of wafers, and the two rows of wafers are respectively stuck in the two rows of grooves.
5. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 2,
tungsten steel wear-resistant blocks are embedded on the lower surface of the organic glass, a plurality of tungsten steel wear-resistant blocks are arranged, and the tungsten steel wear-resistant blocks are uniformly distributed on the peripheries of the two rows of wafers.
6. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 2,
the lower surface of the organic glass is processed according to the outer diameter curved surface of the steel pipe;
preferably, the ratio t/D of the wall thickness to the outer diameter of the ultra-thick wall steel pipe is more than or equal to 0.26;
preferably, the ratio of the wall thickness to the outer diameter of the ultra-thick-wall steel pipe is 0.26-0.311.
7. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 2,
the coupling water flows to the contact surface of the organic glass and the steel pipe, the organic glass and the steel pipe contact surface form a water film, and the ultrasonic wave and the steel pipe are stably coupled.
8. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 1,
a through hole is arranged in the middle of the swing frame, the probe can enter the through hole,
preferably, the device further comprises a balance plate, the balance plate is arranged above the swing frame, and the probe and the balance plate are fixed through screws.
9. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 8,
still include a plurality of support columns, the periphery of through-hole is opened there are a plurality of first blind holes, it has a plurality of second blind holes, one to open on the balance plate first blind hole and one the position of second blind hole corresponds, one the support column passes one get into one behind the second blind hole in the first blind hole the outside position cover that is located the balance plate top of support column is equipped with floating pressure spring.
10. The ultrasonic testing apparatus for ultra-thick-walled steel pipes according to claim 1,
the two ends of the swing frame are respectively connected with a plurality of supporting plates, each supporting plate is provided with a universal tracking ball, and when the swing frame falls onto the steel pipe, the bottom ends of the universal tracking balls are in contact with the surface of the steel pipe and can roll on the surface of the steel pipe, so that the steel pipe can be tracked well;
preferably, the number of the ball joint tracking balls is 4.
CN202110706430.5A 2021-06-24 2021-06-24 Ultrasonic flaw detection device for ultra-thick-wall steel pipe Pending CN113267565A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111141819A (en) * 2019-09-20 2020-05-12 盐城新耀模具有限公司 Method for detecting damage to inner wall of mold body
CN114165686A (en) * 2021-11-24 2022-03-11 重庆零壹空间航天科技有限公司 Multi-probe flaw detection device adaptable to complex curved surface of rocket solid engine shell
US11345201B2 (en) * 2020-03-24 2022-05-31 Baker Hughes Holdings Llc Vehicle suspension with coupled, pivoting, opposing support legs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111141819A (en) * 2019-09-20 2020-05-12 盐城新耀模具有限公司 Method for detecting damage to inner wall of mold body
US11345201B2 (en) * 2020-03-24 2022-05-31 Baker Hughes Holdings Llc Vehicle suspension with coupled, pivoting, opposing support legs
CN114165686A (en) * 2021-11-24 2022-03-11 重庆零壹空间航天科技有限公司 Multi-probe flaw detection device adaptable to complex curved surface of rocket solid engine shell

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