CN117347482A - Centering device and centering method for steel pipe ultrasonic flaw detection equipment - Google Patents
Centering device and centering method for steel pipe ultrasonic flaw detection equipment Download PDFInfo
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- CN117347482A CN117347482A CN202311276889.1A CN202311276889A CN117347482A CN 117347482 A CN117347482 A CN 117347482A CN 202311276889 A CN202311276889 A CN 202311276889A CN 117347482 A CN117347482 A CN 117347482A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 58
- 239000010959 steel Substances 0.000 title claims abstract description 58
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000000523 sample Substances 0.000 claims description 55
- 230000007704 transition Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 230000013011 mating Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
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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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
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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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
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- 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
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- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a centering device and a centering method of steel pipe ultrasonic flaw detection equipment, wherein the centering device of the steel pipe ultrasonic flaw detection equipment comprises a centering roller adjusting part, at least one guide sleeve and a core rod, wherein the centering roller adjusting part is arranged in a three-roller centering device and corresponds to a centering roller, and the guide sleeve is suitable for being assembled into a steel pipe cavity of a rotating main shaft; the core rod is suitable for being assembled into the guide sleeve, and the axis of the core rod assembled on the guide sleeve and the axis of the rotating main shaft assembled on the guide sleeve are positioned on the same straight line; the centering roller adjusting component is suitable for adjusting the position of the corresponding centering roller; the centering roller adjusting component is used for centering and pre-adjusting, namely, after the mandrel is assembled on the rotating main shaft through the guide sleeve, the position of the centering roller is adjusted through the centering roller adjusting component so that the outer wall surface of the centering roller contacts the outer surface of the mandrel. The centering effect can be improved, and the flaw detection precision of the steel pipe can be improved.
Description
Technical Field
The invention relates to a centering device and a centering method for steel pipe ultrasonic flaw detection equipment, and belongs to the technical field of detection.
Background
In the ultrasonic flaw detection of the steel pipe, high-frequency electric pulses generated by an ultrasonic flaw detector are applied to a probe to excite a piezoelectric wafer in the probe to vibrate so as to generate ultrasonic waves. The ultrasonic wave propagates into the steel pipe at a certain speed, when encountering a defect, one part of the acoustic wave is reflected back, and the other part of the acoustic wave continues to propagate forwards and is reflected back after encountering the bottom surface of the steel pipe. When the sound wave reflected by the defect and the bottom surface reaches the probe, the sound vibration is changed into electric pulse through the piezoelectric wafer. And amplifying the reflected wave, the defect wave and the bottom wave by the instrument, and displaying the amplified reflected wave, the defect wave and the bottom wave on the instrument. Through searching, the Chinese patent with publication number of CN102565196A discloses a steel tube ultrasonic flaw detector, in the patent, the structure of steel tube linear propulsion and ultrasonic probe rotation is adopted, the propulsion and rotation speed is improved, and the energy consumption is saved;
chinese patent publication No. CN202649177U discloses a centering device for ultrasonic flaw detection equipment for steel pipes, in which a structure of a steel wire and a centering ring is adopted, the steel wire is straightened by a gravity hanger, and the height position of the steel wire is adjusted by a height adjusting mechanism so as to be maintained in a horizontal state. By observing the position of the steel wire on the centering ring, the center deviation of the ultrasonic flaw detection equipment can be judged, and the centering can be adjusted. Meanwhile, the centering ring can be used as a reference, the steel wire can be adjusted to the center position of the centering ring, and then the center positions of other steel tube clamping devices can be adjusted and centered. However, this patent requires the provision of various additional components and by way of observation, and does not take into account the wear of the centring rollers, the centring adjustment still presents problems.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the centering device of the ultrasonic flaw detection equipment for the steel pipe, which can improve the centering effect and the flaw detection precision of the steel pipe.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a steel pipe ultrasonic flaw detection equipment centering device, steel pipe ultrasonic flaw detection equipment includes box, pass the rotatory main shaft of steel pipe and install at rotatory epaxial ultrasonic probe and be located the three roller centering device of box both sides, and three roller centering device includes three contact steel pipe in order to inject the centering roller in steel pipe center, and steel pipe ultrasonic flaw detection equipment centering device includes:
the centering roller adjusting component is arranged in the three-roller centering device and corresponds to the centering roller;
at least one guide sleeve, the said guide sleeve is fit for fitting into the steel tube cavity of the said rotary main shaft;
the mandrel is suitable for being assembled into the guide sleeve, and the axis of the mandrel assembled on the guide sleeve and the axis of the rotating main shaft assembled on the guide sleeve are positioned on the same straight line; wherein,
the centering roller adjusting component is suitable for adjusting the position of the corresponding centering roller;
the centering roller adjusting component is used for centering and pre-adjusting, namely, after the mandrel is assembled on the rotating main shaft through the guide sleeve, the position of the centering roller is adjusted through the centering roller adjusting component so that the outer wall surface of the centering roller contacts the outer surface of the mandrel.
Further, in order to better improve the centering effect and improve the flaw detection precision, the centering roller adjusting component is also used for performing centering fine adjustment, namely, after centering fine adjustment, the core rod is directly borne by the centering roller of the three-roller centering device, meanwhile, the core rod passes through the rotating main shaft and coincides with the axis of the rotating main shaft, the ultrasonic probe is used for detecting different positions of the core rod in the circumferential direction, and the position of the centering roller is repeatedly adjusted by the centering roller adjusting component according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
Further, in order to facilitate adjustment of the position of the centering roller, the centering roller adjustment member includes an eccentric shaft including a first shaft portion and a second shaft portion eccentrically disposed, the respective centering rollers being rotatably connected to the first shaft portion;
the three-roller centering device comprises a roller swing arm which is correspondingly arranged with the centering roller and hinged on the box body, the second shaft part is inserted and fastened on the roller swing arm, and the corresponding centering roller is adjusted by rotating the second shaft part on the roller swing arm.
Further, the three-roller centering device includes:
the swing power assembly is hinged on the box body;
the swing power assembly is movably connected with the three roller swing arms so as to drive the three roller swing arms to swing and drive the three centering rollers to swing.
Further, the three roller swing arms are a first roller swing arm, a second roller swing arm and a third roller swing arm respectively;
the first roller swing arm comprises a first main support arm, a first auxiliary support arm and a first centering roller arm which are connected in a Y-shaped distribution at the hinge center of the first main support arm and the box body;
the second roller swing arm comprises a second main support arm, a second auxiliary support arm and a second centering roller arm which are connected in a Y-shaped distribution at the hinge center of the second main support arm and the box body;
the third roller swing arm comprises a third main support arm and a third centering roller arm which are connected to the hinge center of the third roller swing arm and the box body; wherein,
the first centering roller arm, the second centering roller arm and the third centering roller arm are respectively connected with corresponding centering rollers through centering roller adjusting parts;
the first main support arm is movably connected with the swing power assembly, the first auxiliary support arm is hinged with one end of the first transition hinge arm, the other end of the first transition hinge arm is hinged with the second main support arm, the second auxiliary support arm is hinged with one end of the second transition hinge arm, and the other end of the second transition hinge arm is hinged with the third main support arm.
Further, in order to tightly and stably match the rotating main shaft with the core rod, the outer wall surface of the guide sleeve is provided with an outer guide sleeve matching surface matched with the inner diameter of the steel pipe cavity of the rotating main shaft;
and the guide sleeve is also provided with a guide sleeve inner matching surface matched with the outer diameter of the outer wall surface of the core rod.
The invention also provides a centering method of the centering device of the ultrasonic flaw detection equipment for the steel pipe, which comprises the following steps:
centering pre-adjustment: after the mandrel is assembled on the rotary main shaft through the guide sleeve, the position of the centering roller is adjusted so that the outer wall surface of the centering roller contacts the outer surface of the mandrel;
centering and fine tuning: and directly carrying the core rod by using a three-roller centering device after centering and pre-adjusting, enabling the core rod to pass through the rotating main shaft and coincide with the axis of the rotating main shaft, detecting different positions of the core rod in the circumferential direction by using an ultrasonic probe, and repeatedly adjusting the position of the centering roller according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
Further, the ultrasonic probe perpendicularly enters the couplant layer between the ultrasonic probe and the mandrel, and the information data fed back by the ultrasonic probe is the perpendicular distance of the couplant layer between the ultrasonic probe and the mandrel at a plurality of positions in the circumferential direction of the mandrel.
Further, the ultrasonic probe is rotated so that the ultrasonic probe probes the mandrel at least at four positions, which are the upper, lower, left, and right positions of the mandrel, respectively.
Further, the threshold range is ±0.2mm.
By adopting the technical scheme, the invention has the following beneficial effects:
1. in the invention, the three-roller centering device is firstly opened, the guide sleeves are arranged at two sides of the rotary main shaft, then the core rod is slowly plugged into the guide sleeves, so that the core rod is just plugged into the guide sleeves at two sides, then the position of the three-roller centering device is adjusted, the centering roller of the three-roller centering device contacts the surface of the core rod, and when the center of the equipment is not ideal, the centering roller does not contact the core rod at the same time, but is slowly adjusted through the eccentric shaft on the three-roller centering device, so that the centering roller just contacts the outer surface of the core rod, thereby realizing centering pre-adjustment.
2. In the invention, centering fine adjustment can be performed, namely, after centering fine adjustment, the guide sleeve is taken away, the mandrel is directly borne by the centering roller of the three-roller centering device, meanwhile, the mandrel passes through the rotating main shaft and coincides with the axis of the rotating main shaft, different positions of the mandrel in the circumferential direction are detected by the ultrasonic probe, the vertical distance between the ultrasonic probes at a plurality of positions of the mandrel and the couplant layer between the mandrels is measured, and the positions of the centering roller are repeatedly adjusted by the centering roller adjusting component according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
Drawings
FIG. 1 is a schematic structural view of a centering device of a steel pipe ultrasonic flaw detection apparatus of the present invention;
FIG. 2 is a schematic structural view of the eccentric shaft of the present invention;
FIG. 3 is a schematic view of a guide sleeve according to the present invention;
fig. 4 is a schematic structural view of the mandrel of the present invention.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Example 1
As shown in fig. 1 to 4, the ultrasonic flaw detection device for steel pipes includes a box 1, a rotating main shaft passing through the steel pipes, an ultrasonic probe installed on the rotating main shaft, and three-roller centering devices located at two sides of the box 1, wherein the three-roller centering devices include three centering rollers 21 contacting the steel pipes to define the center of the steel pipes, when the steel pipes are subjected to specific flaw detection, a couplant is injected between the steel pipes and the ultrasonic probe to form a couplant layer, the general couplant is water, the specific operation mode and the rest structure of the ultrasonic flaw detection device for steel pipes are in the prior art, and the embodiment does not describe in detail, and the embodiment describes the centering device for the ultrasonic flaw detection device for steel pipes, including:
centering roller adjusting means provided in the three-roller centering device and provided in correspondence with the centering roller 21;
the two guide sleeves 4 are suitable for being assembled into the two side end parts of the steel pipe cavity of the rotary main shaft;
the core rod 5, the core rod 5 is suitable for being assembled into the guide sleeve 4, and the axis of the core rod 5 assembled on the guide sleeve 4 and the axis of the rotating main shaft assembled with the guide sleeve 4 are positioned on the same straight line; wherein,
the centring roller adjustment means are adapted to adjust the position of the respective centring roller 21;
the centering roller adjusting means is used for centering pre-adjustment, i.e. the position of the centering roller 21 is adjusted by the centering roller adjusting means after the mandrel 5 is assembled on the rotating spindle through the guide sleeve 4 such that the outer wall surface of the centering roller 21 contacts the outer surface of the mandrel 5.
Specifically, in order to improve flaw detection precision, the centering roller adjusting component is further used for performing centering fine adjustment, namely, after centering fine adjustment, the mandrel 5 is directly carried by the centering roller 21 of the three-roller centering device, meanwhile, the mandrel 5 passes through the rotating main shaft and coincides with the axis of the rotating main shaft, different positions of the mandrel 5 in the circumferential direction are detected by the ultrasonic probe, and the position of the centering roller 21 is repeatedly adjusted by the centering roller adjusting component according to information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
Specifically, as shown in fig. 2, the centering roller adjusting member includes an eccentric shaft 31, the eccentric shaft 31 includes a first shaft portion 311 and a second shaft portion 312 that are eccentrically disposed, and the corresponding centering roller 21 is rotatably connected to the first shaft portion 311; in the present embodiment, the first shaft portion 311 and the second shaft portion 312 are not coaxial, and the eccentric distance between the first shaft portion 311 and the second shaft portion 312 may be 1mm, which may be set as required.
The three-roller centering device comprises a roller swing arm which is correspondingly arranged with the centering roller 21 and hinged on the box body 1, wherein a second shaft part 312 is inserted and fastened on the roller swing arm, an insertion hole is formed in the roller swing arm, the second shaft part 312 is inserted in the insertion hole, a set screw is screwed on the roller swing arm through threads, the corresponding centering roller 21 is adjusted by rotating the second shaft part 312 on the roller swing arm, and after the centering roller 21 is adjusted in place, the second shaft part 312 can be abutted against the set screw through screwing to fix the position of the centering roller 21.
Specifically, as shown in fig. 1, the three-roller centering device may have a structure including:
a swing power assembly 22 hinged to the case 1;
the swing power assembly 22 is movably connected with the three roller swing arms to drive the three roller swing arms to swing and drive the three centering rollers 21 to swing.
Specifically, the three roller swing arms are a first roller swing arm 23, a second roller swing arm 24, and a third roller swing arm 25, respectively;
the first roller swing arm 23 comprises a first main support arm 231, a first auxiliary support arm 232 and a first positioning roller arm 233 which are connected in a Y-shaped distribution at the hinging center of the first main support arm and the box body 1;
the second roller swing arm 24 comprises a second main support arm 241, a second auxiliary support arm 242 and a second centering roller arm 243 which are connected in a Y-shaped distribution at the hinging center of the second main support arm and the box body 1;
the third roller swing arm 25 includes a third main arm 251 and a third centering roller arm 252 connected at the hinge center thereof with the casing 1; wherein,
the first centering roller arm 233, the second centering roller arm 243, and the third centering roller arm 252 are respectively connected to the corresponding centering rollers 21 through centering roller adjusting members;
the first main arm 231 is movably connected with the swing power assembly 22, the first auxiliary arm 232 is hinged with one end of the first transition hinge arm 26, the other end of the first transition hinge arm 26 is hinged with the second main arm 241, the second auxiliary arm 242 is hinged with one end of the second transition hinge arm 27, and the other end of the second transition hinge arm 27 is hinged with the third main arm 251.
In this embodiment, the swing power assembly 22 may refer to a structural arrangement in a steel tube ultrasonic flaw detector disclosed in chinese patent publication No. CN102565196a, which is not described in detail in this embodiment.
In this embodiment, when the swing power assembly 22 acts, the first main support arm 231 is driven to swing, the first main support arm 231 drives the first auxiliary support arm 232 and the first centering roller arm 233 to swing, the first auxiliary support arm 232 drives the second main support arm 241 to swing through the first transition hinge arm, the second main support arm 241 drives the second auxiliary support arm 242 and the second centering roller arm 243 to swing, the second auxiliary support arm 242 drives the third main support arm 251 and the third centering roller arm 252 to swing through the second transition hinge arm 27, and the swinging of the first centering roller arm 233, the second centering roller arm 243 and the third centering roller arm 252 synchronously drives the three centering rollers 21 to swing.
Specifically, as shown in fig. 3, the outer wall surface of the guide sleeve 4 is provided with a guide sleeve outer mating surface 41 which mates with the inner diameter of the steel pipe cavity of the rotating main shaft; the guide sleeve 4 is also provided with a guide sleeve inner matching surface 42 matched with the outer diameter of the outer wall surface of the core rod 5;
in the present embodiment, the specific dimension of the outer mating surface 41 of the guide sleeve is(-0.085/-0.11), the outer diameter of the mandrel having a specific dimension of 60mm+0/-0.03mm, the inner mating surface 42 of the guide sleeve having a specific dimension of 60mm+0.03/+0.05mm.
Example two
The embodiment describes a centering method of a centering device of a steel pipe ultrasonic flaw detection apparatus in the first embodiment, and the method includes the steps of:
centering pre-adjustment: after the mandrel 5 is assembled on the rotating main shaft through the guide sleeve 4, the position of the centering roller 21 is adjusted so that the outer wall surface of the centering roller 21 contacts the outer surface of the mandrel 5;
centering and fine tuning: the core rod 5 is directly borne by the three-roller centering device after centering and pre-adjusting, meanwhile, the core rod 5 passes through the rotating main shaft and coincides with the axis of the rotating main shaft, different positions of the core rod 5 in the circumferential direction are detected by the ultrasonic probe, and the position of the centering roller 21 is repeatedly adjusted according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
Specifically, the ultrasonic probe perpendicularly enters the couplant layer between the ultrasonic probe and the mandrel 5, and the information data fed back by the ultrasonic probe is the perpendicular distance of the couplant layer between the ultrasonic probe and the mandrel 5 at a plurality of positions in the circumferential direction of the mandrel 5. The coupling agent may be water.
Specifically, the ultrasonic probe is rotated so that the ultrasonic probe probes the mandrel 5 at least at four positions, which are respectively four positions of the upper, lower, left, and right of the mandrel 5.
Specifically, the threshold range is ±0.2mm, i.e., the deviation of the vertical distance of the couplant layer corresponding to each position is within ±0.2mm.
Specifically, in this embodiment, the steps of the method specifically include:
centering pre-adjustment: firstly, the three-roller centering device is opened, guide sleeves 4 are arranged on two sides of a rotating main shaft, then, a mandrel 5 is slowly plugged into the guide sleeves 4, so that the mandrel 5 is just plugged into the guide sleeves 4 on two sides, then, the position of the centering roller 21 of the three-roller centering device is adjusted, so that the centering roller 21 of the three-roller centering device contacts the surface of the mandrel 5, when the center of equipment is not ideal, the centering roller 21 does not contact the mandrel 5 at the same time, and the eccentric shaft 31 on the three-roller centering device is slowly adjusted, so that the centering roller 21 just contacts the outer surface of the mandrel 5, thereby realizing centering pre-adjustment.
Centering and fine tuning: taking away the guide sleeve 4, directly using a three-roller centering device to assemble the core rod 5, setting the height of the rotating main shaft to be consistent with the height of the core rod 5, putting the core rod 5 into a steel pipe cavity of the rotating main shaft, opening a water supply valve, starting a water supply pump, filling a couplant between an ultrasonic probe and the core rod to form a couplant layer, starting an ultrasonic flaw detector, enlarging the range of sound, selecting the vertical incidence state of the ultrasonic probe in the ultrasonic probe for facilitating the observation of waveforms, adjusting the sound velocity of materials to 1480m/s until primary boundary wave can be observed, then reducing the sound path and adjusting the delay to enable a screen to display only primary boundary wave, adjusting the height of the boundary wave to 80%, enabling the gate height to be 40%, and rotating the ultrasonic probe to a clock 12:00, finding the highest reflected echo of the primary interface wave, then recording the water layer distance (namely the vertical distance of the couplant layer) of the primary interface wave displayed by the instrument, and sequentially rotating the ultrasonic probe to a clock 3: 00. 6: 00. 9:00 positions were tested and recorded. The eccentric shaft 31 was repeatedly adjusted so that the distance values of the water layer at the upper, lower, left and right positions were within + -0.2 mm, as shown in the following table.
| Clock position | Distance of water layer mm |
| 12:00 on | 38.1 |
| 3:00 right side | 38.3 |
| 6:00 lower part of | 38.3 |
| 9: about 00 | 38.1 |
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. The utility model provides a steel pipe ultrasonic flaw detection equipment centering device, steel pipe ultrasonic flaw detection equipment includes box (1), passes the rotatory main shaft of steel pipe and installs the epaxial ultrasonic probe of rotatory main and be located the three roller centering device of box (1) both sides, and three roller centering device includes three centering roller (21) that contact steel pipe in order to inject the steel pipe center, its characterized in that, steel pipe ultrasonic flaw detection equipment centering device includes:
a centering roller adjusting component which is arranged in the three-roller centering device and is arranged corresponding to the centering roller (21);
at least one guide sleeve (4), wherein the guide sleeve (4) is suitable for being assembled into a steel pipe cavity of the rotating main shaft;
the core rod (5), the said core rod (5) is suitable for assembling into the said guide bush (4), the axis of the core rod (5) assembled on said guide bush (4) is located on the same straight line with the axis of the rotary main shaft assembling the said guide bush (4); wherein,
the centering roller adjusting means are adapted to adjust the position of the respective centering roller (21);
the centering roller adjusting component is used for carrying out centering pre-adjustment, namely, after the mandrel (5) is assembled on the rotary main shaft through the guide sleeve (4), the position of the centering roller (21) is adjusted through the centering roller adjusting component so that the outer wall surface of the centering roller (21) contacts the outer surface of the mandrel (5).
2. The centering device for ultrasonic flaw detection equipment for steel pipes according to claim 1, wherein,
the centering roller adjusting component is also used for centering and fine adjustment, namely, after centering and fine adjustment, the core rod (5) is directly borne by the centering roller (21) of the three-roller centering device, meanwhile, the core rod (5) passes through the rotating main shaft and coincides with the axis of the rotating main shaft, different positions of the core rod (5) in the circumferential direction are detected by the ultrasonic probe, and the position of the centering roller (21) is repeatedly adjusted by the centering roller adjusting component according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe are within a threshold range.
3. The centering device for ultrasonic flaw detection equipment for steel pipes according to claim 1, wherein,
the centering roller adjusting component comprises an eccentric shaft (31), the eccentric shaft (31) comprises a first shaft part (311) and a second shaft part (312) which are eccentrically arranged, and the corresponding centering roller (21) is rotationally connected to the first shaft part (311);
the three-roller centering device comprises a roller swing arm which is arranged corresponding to the centering roller (21) and hinged on the box body (1), the second shaft part (312) is inserted into and fastened on the roller swing arm, and the corresponding centering roller (21) is adjusted by rotating the second shaft part (312) on the roller swing arm.
4. The centering device for ultrasonic flaw detection equipment for steel pipes according to claim 3, characterized in that,
the three-roller centering device includes:
a swing power assembly (22) hinged to the box body (1);
the swing power assembly (22) is movably connected with the three roller swing arms so as to drive the three roller swing arms to swing and drive the three centering rollers (21) to swing.
5. The centering device for ultrasonic flaw detection equipment for steel pipes as claimed in claim 4, wherein,
the three roller swing arms are a first roller swing arm (23), a second roller swing arm (24) and a third roller swing arm (25) respectively;
the first roller swing arm (23) comprises a first main support arm (231), a first auxiliary support arm (232) and a first centering roller arm (233) which are connected in a Y-shaped distribution at the hinge center of the first main support arm and the box body (1);
the second roller swing arm (24) comprises a second main support arm (241), a second auxiliary support arm (242) and a second centering roller arm (243) which are connected in a Y-shaped distribution at the hinging center of the second main support arm and the box body (1);
the third roller swing arm (25) comprises a third main support arm (251) and a third centering roller arm (252) which are connected to the hinge center of the third roller swing arm and the box body (1); wherein,
the first centering roller arm (233), the second centering roller arm (243) and the third centering roller arm (252) are respectively connected with the corresponding centering rollers (21) through centering roller adjusting parts;
the first main support arm (231) is movably connected with the swing power assembly (22), the first auxiliary support arm (232) is hinged with one end of the first transition hinge arm (26), the other end of the first transition hinge arm (26) is hinged with the second main support arm (241), the second auxiliary support arm (242) is hinged with one end of the second transition hinge arm (27), and the other end of the second transition hinge arm (27) is hinged with the third main support arm (251).
6. The centering device for ultrasonic flaw detection equipment for steel pipes according to claim 1, wherein,
the outer wall surface of the guide sleeve (4) is provided with a guide sleeve outer matching surface (41) matched with the inner diameter of the steel pipe cavity of the rotary main shaft;
the guide sleeve (4) is also provided with a guide sleeve inner matching surface (42) matched with the outer diameter of the outer wall surface of the core rod (5).
7. A method for centering a centering device for an ultrasonic flaw detection apparatus for steel pipes as claimed in any one of claims 1 to 6, characterized in that the method comprises the steps of:
centering pre-adjustment: after a mandrel (5) is assembled on the rotary main shaft through a guide sleeve (4), adjusting the position of the centering roller (21) so that the outer wall surface of the centering roller (21) contacts the outer surface of the mandrel (5);
centering and fine tuning: the core rod (5) is directly borne by the three-roller centering device after centering and pre-adjusting, meanwhile, the core rod (5) passes through the rotating main shaft and coincides with the axis of the rotating main shaft, different positions of the core rod (5) in the circumferential direction are detected by the ultrasonic probe, and the position of the centering roller (21) is repeatedly adjusted according to the information data fed back by the ultrasonic probe until the information data fed back by the ultrasonic probe is within a threshold range.
8. The centering method as claimed in claim 7, wherein,
the ultrasonic probe perpendicularly enters the couplant layer between the ultrasonic probe and the core rod (5), and the information data fed back by the ultrasonic probe is the perpendicular distance between the ultrasonic probe and the core rod (5) at a plurality of positions in the circumferential direction of the core rod (5).
9. The centering method as claimed in claim 7, wherein,
the ultrasonic probe is rotated so that the ultrasonic probe detects the core rod (5) at least at four positions, which are respectively the upper, lower, left and right positions of the core rod (5).
10. The centering method as claimed in claim 7 or 9, characterized in that,
the threshold range is + -0.2 mm.
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| CN117969667A (en) * | 2024-03-28 | 2024-05-03 | 江苏三合声源超声波科技有限公司 | Full-automatic ultrasonic flaw detection equipment and use method |
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| CN117969667A (en) * | 2024-03-28 | 2024-05-03 | 江苏三合声源超声波科技有限公司 | Full-automatic ultrasonic flaw detection equipment and use method |
| CN117969667B (en) * | 2024-03-28 | 2024-06-11 | 江苏三合声源超声波科技有限公司 | Full-automatic ultrasonic flaw detection equipment and use method |
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