CN110887896A - Stainless steel argon arc welding circular welding pipe weld defect eddy current on-line tracking detection device - Google Patents
Stainless steel argon arc welding circular welding pipe weld defect eddy current on-line tracking detection device Download PDFInfo
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- CN110887896A CN110887896A CN201911100776.XA CN201911100776A CN110887896A CN 110887896 A CN110887896 A CN 110887896A CN 201911100776 A CN201911100776 A CN 201911100776A CN 110887896 A CN110887896 A CN 110887896A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9093—Arrangements for supporting the sensor; Combinations of eddy-current sensors and auxiliary arrangements for marking or for rejecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/42—Simultaneous measurement of distance and other co-ordinates
Abstract
The invention relates to an eddy current online tracking detection device for weld defects of a stainless steel argon arc welding round welded pipe, which comprises an installation and positioning plate, a weld offset ultrasonic detection mechanism and an eddy current probe rotation tracking detection mechanism. Compared with the prior art, the online tracking detection device effectively detects and tracks the specific angle of the deviation of the welding seam, and keeps the effective lifting distance of the detection unchanged by adjusting the position of the flat and long straight probe with the magnetic core in real time, thereby ensuring the detection sensitivity of the eddy current flaw detection device; the online tracking detection device utilizes the acoustic impedance difference between the welding seam material and the parent metal, utilizes the pulse echo generated when ultrasonic waves are transmitted to the joint surface of the welding seam and the parent metal in the pipe wall, and utilizes the echo waveform to determine the distance from the joint surface to the probe, thereby calculating the specific deflection angle of the welding seam and obviously improving the accuracy of data acquisition; after the online tracking detection device detects and positions the welding line by utilizing ultrasonic waves, the specific deflection angle of the eddy current probe is transmitted to the microprocessor, and the eddy current probe is driven by the servo motor to move in real time.
Description
Technical Field
The invention relates to a weld defect detection device, in particular to an eddy current online tracking detection device for weld defects of stainless steel argon arc welding circular welded pipes.
Background
In order to ensure the quality of the welding seam of the welded pipe, a plurality of stainless steel welded pipe manufacturers are equipped with eddy current flaw detection devices on an argon arc welding round welded pipe welding production line, but due to the influence of various factors such as equipment, a mold, raw materials and the like, the welding seam of the welded pipe and the axis of the welded pipe cannot be strictly parallel in the production process, and the specific expression is that the welding seam swings by taking the vertical middle axial plane of the round welded pipe as the center, and the maximum swinging angle is about 15 degrees, which is shown in figure 1.
Meanwhile, in the production process of the welded pipe, the weld joint on the outer surface is leveled and polished, so that the weld joint on the surface is difficult to directly and visually distinguish. During the eddy current flaw detection process of the welding seam of the welded pipe, the welding seam may deviate from the effective detection area of the eddy current probe due to overlarge swinging of the welding seam, so that the defect missing detection phenomenon occurs and the quality of the welded pipe is influenced.
Currently, to compensate for the effects of weld misalignment, most inspection devices employ two probes, a flat long straight probe with a magnetic core and an elliptical saddle probe without a magnetic core, as shown in fig. 2 and 3, respectively. The saddle-type probe covers a large effective detection area, but the magnetic field distribution of the saddle-type probe is dispersed, the detection sensitivity is limited, and only when the surface defect of the welding seam is large, the diameter of the perforation is usually large
Discrimination can be performed only in time, and the detection requirement cannot be met in many cases; compared with a saddle type probe, the flat and long straight probe with the magnetic core has higher detection sensitivity because the magnetic field is relatively concentrated, but the effective lifting distance is increased when the flat and long straight probe with the magnetic core is detected due to the random deviation of the welding seam, the detection sensitivity is sharply reduced, and the tiny defects on the surface or the near surface of the welding seam cannot be detected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the eddy current on-line tracking detection device for the weld defects of the stainless steel argon arc welding round welded pipe, which can effectively detect and track the specific angle of the offset of the weld, and can keep the effective lifting distance of the detection unchanged by adjusting the position of the flat and long straight probe with the magnetic core in time, thereby ensuring the detection sensitivity of the eddy current flaw detection device.
The purpose of the invention can be realized by the following technical scheme:
the invention discloses a stainless steel argon arc welding round welded pipe weld defect eddy current online tracking detection device, which comprises an installation and positioning plate, a weld offset ultrasonic detection mechanism and an eddy current probe rotation tracking detection mechanism, wherein the detection mechanism specifically comprises the following components:
the mounting and positioning plate comprises a panel body and a positioning assembly, wherein the positioning assembly comprises a plurality of vertical rollers, and the vertical rollers are used for extruding and limiting the steel pipe to be tested;
the welding seam offset ultrasonic detection mechanism is arranged on the panel body and comprises a water tank, an ultrasonic probe and a microprocessor, wherein the water tank is provided with a pore canal which penetrates through the water tank along the x direction, the ultrasonic probe is arranged on two sides of the pore canal, a steel pipe to be tested is positioned and sent into the pore canal by a component, a signal excited by the ultrasonic probe tracks the welding seam of the stainless steel welded pipe, and after the ultrasonic probe receives an echo signal, the microprocessor calculates the time of the echo signal and calculates the position and the offset angle of the welding seam;
the eddy current probe rotates and tracks the detection mechanism and locates the panel body on, welding seam skew ultrasonic testing mechanism include servo motor, hollow shaft, hold-in range, ring flange and eddy current probe, ring flange and hollow shaft coupling, eddy current probe connect in the ring flange on, hold-in range one end with hollow shaft transmission connect, the other end is driven by servo motor transmission, the steel pipe that awaits measuring via the inside of pore entering hollow shaft, servo motor acquire the instruction that is sent by microprocessor in real time to make eddy current probe deflect corresponding angle, with this tracking and detect the welding seam that awaits measuring on the steel pipe.
Further, the positioning assembly comprises a first vertical roller, a second vertical roller, a third vertical roller and a fourth vertical roller, the first vertical roller and the third vertical roller pair penetrate through the steel pipes to be tested between the first vertical roller and the third vertical roller pair to provide y-direction extrusion limit, and the second vertical roller and the fourth vertical roller pair penetrate through the steel pipes to be tested between the second vertical roller and the fourth vertical roller pair to provide z-direction extrusion limit.
The x direction in the invention is a horizontal direction, and the x direction is the same as the axial direction of the pore channel of the water tank and the axial direction of the hollow shaft;
in the invention, the y direction is a horizontal direction, the y direction is vertical to the x direction,
the z direction in the invention is a vertical direction and is vertical to the plane of the panel body.
Furthermore, the first vertical roll, the second vertical roll, the third vertical roll and the fourth vertical roll are all composed of two rolls, a shaft penetrating through the two rolls and a support, and the shaft is arranged on the support.
Furthermore, each roller is provided with a concave arc surface matched with the steel pipe to be tested.
Further, the shaft can be driven by power equipment, so that the rollers are driven together, and the steel pipe to be tested between the extrusion and the two rollers is extruded to perform linear displacement in the x direction.
Furthermore, the two ends of the pore channel are provided with sealing rings matched with the steel pipe to be tested, so that water in the water tank can submerge the steel pipe to be tested.
Furthermore, a probe mounting plate is arranged at the top of the water tank, and the two ultrasonic probes are connected to the probe mounting plate.
Furthermore, the microprocessor calculates the time of the echo signal, calculates the position and the offset angle of the welding line, obtains the position and the offset angle of the welding line after signal processing, converts the position and the offset angle into the number of turns and the direction of rotation of the output shaft of the servo motor, and finally converts the information into an electric signal to be sent to the servo motor.
Furthermore, the eddy current probe is arranged on the disc surface of the flange plate along the radial direction of the flange plate, and the distance between the eddy current probe and the steel pipe to be tested is less than 0.2mm in the process that the steel pipe to be tested enters the hollow shaft.
Furthermore, a stroke cylinder is arranged on the flange plate along the radial direction of the flange plate, a telescopic rod of the stroke cylinder is connected with the eddy current probe, and the distance between the eddy current probe and the steel pipe to be tested is controlled through the stroke cylinder.
Further, the panel main body is a welding platform.
Compared with the prior art, the invention has the following advantages:
1) the online tracking detection device effectively detects and tracks the specific angle of the deviation of the welding seam, and keeps the effective lifting distance of the detection unchanged by adjusting the position of the flat and long straight probe with the magnetic core in real time, thereby ensuring the detection sensitivity of the eddy current flaw detection device.
2) The online tracking detection device provided by the invention utilizes the acoustic impedance difference between the welding seam material and the parent metal, utilizes the pulse echo generated when the ultrasonic wave is transmitted to the joint surface of the welding seam and the parent metal in the pipe wall, and utilizes the echo waveform to determine the distance from the joint surface to the probe, thereby calculating the specific deflection angle of the welding seam, and remarkably improving the accuracy of data acquisition.
3) After the online tracking detection device of the invention uses ultrasonic to detect and position the welding seam, the specific deflection angle of the eddy current probe is transmitted to the microprocessor, and the servo motor drives the eddy current probe to move in real time, thereby meeting the requirement that the welding seam is in the effective detection area of the eddy current probe at any moment and ensuring the effectiveness of welding seam eddy current inspection.
Drawings
FIG. 1 is a schematic view of a weld swing;
FIG. 2 is a schematic view of a flat long straight probe with a magnetic core;
FIG. 3 is a schematic view of an elliptical saddle probe without a magnetic core;
FIG. 4 is a schematic diagram of detecting echoes;
FIG. 5 is a schematic view of the ultrasonic propagation path;
FIG. 6 is a schematic structural diagram of an on-line tracking detection device according to the present invention;
FIG. 7 is a schematic structural view of the mechanism mounting and positioning plate of the present invention;
FIG. 8 is a schematic structural view of an ultrasonic detection mechanism for weld joint displacement according to the present invention;
FIG. 9 is a schematic structural view of an eddy current probe rotation tracking detection mechanism according to the present invention;
FIG. 10 is a schematic diagram of the stroke cylinder and eddy current probe of the present invention.
In the figure: 1. mechanism mounting and positioning plate, 2, welding seam deviation ultrasonic detection mechanism, 3, eddy current probe rotation tracking detection mechanism, 11, first bolt, 12, first vertical roller, 13, first handle, 14, second vertical roller, 15, first bearing plate, 16, first bearing seat, 17, second bolt, 18, third vertical roller, 19, second handle, 110, second vertical roller, 111, second bearing seat, 112, second bearing plate, 113, welding platform, 21, water tank, 22, first drain pipe, 23, second drain pipe, 24, bracket, 25, first sealing ring, 26, second sealing ring, 27, arc probe mounting plate, 28, ultrasonic probe, 31, servo motor, 32, coupling, 33, third bearing seat, 34, synchronizing wheel, 35, synchronous belt, 36, fourth bearing seat, 37, synchronizing wheel, 38, flange, 39, stroke cylinder, 310, servo motor, 32, coupling, 33, third bearing seat, 34, synchronizing wheel, 35, synchronous belt, 36, fourth bearing seat, 37, synchronizing wheel, 38, flange, 39, stroke cylinder, 310, eddy current probe 311, guide post 312, spring.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
The invention discloses an eddy current online tracking detection device for weld defects of a stainless steel argon arc welding round welded pipe, which comprises a mounting and positioning plate 1, a weld deviation ultrasonic detection mechanism 2 and an eddy current probe rotation tracking detection mechanism 3, and is shown in figure 1.
The mounting and positioning plate 1 comprises a panel body and a positioning assembly, the positioning assembly described with reference to fig. 6 and 7 comprises a plurality of vertical rollers, and the plurality of vertical rollers extrude and limit the steel pipe to be tested. The positioning assembly comprises a first vertical roller 12, a second vertical roller 14, a third vertical roller 18 and a fourth vertical roller 110, the first vertical roller 12 and the third vertical roller 18 provide y-direction extrusion limit for the steel pipe to be tested penetrating through the first vertical roller 12 and the third vertical roller 18, and the second vertical roller 14 and the fourth vertical roller 110 provide z-direction extrusion limit for the steel pipe to be tested penetrating through the second vertical roller 14 and the fourth vertical roller 110. The x direction in the invention is a horizontal direction, and the x direction is the same as the axial direction of the pore channel of the water tank 21 and the axial direction of the hollow shaft; the y direction in the invention is a horizontal direction, the y direction is vertical to the x direction, and the z direction in the invention is a vertical direction and is vertical to the plane of the panel body. The first vertical roll 12, the second vertical roll 14, the third vertical roll 18 and the fourth vertical roll 110 are all composed of two rolls, a shaft penetrating through the two rolls and a bracket, and the shaft is arranged on the bracket. Each roller is provided with a concave arc surface matched with the steel pipe to be tested. The shaft can be driven by power equipment, so that the rollers are driven together, and the extrusion and the steel pipe to be tested between the two rollers perform linear displacement in the x direction. The panel body is a welding platform 113.
The ultrasonic detection mechanism 2 for weld joint deviation is arranged on the panel body, referring to fig. 8, the ultrasonic detection mechanism 2 for weld joint deviation comprises a water tank 21, an ultrasonic probe 28 and a microprocessor, the water tank 21 is provided with a pore canal penetrating through the water tank 21 along the x direction, the ultrasonic probe 28 is arranged on two sides of the pore canal, a steel pipe to be tested is sent into the pore canal by a positioning component, a signal excited by the ultrasonic probe 28 tracks the weld joint of the stainless steel welded pipe, and after the ultrasonic probe 28 receives an echo signal, the microprocessor calculates the time of the echo signal and calculates the position and the deviation angle of the weld joint. And sealing rings matched with the steel pipe to be tested are arranged at two ends of the pore passage, so that water in the water tank 21 can submerge the steel pipe to be tested. The top of the water tank 21 is provided with a probe mounting plate 27, and two ultrasonic probes 28 are connected to the probe mounting plate 27. The microprocessor calculates the time of the echo signal, calculates the weld azimuth and the offset angle, obtains the weld azimuth and the offset angle after signal processing, converts the weld azimuth and the offset angle into the number of turns and the direction of rotation of the output shaft of the servo motor 31, and finally converts the information into an electric signal to be sent to the servo motor 31.
The eddy current probe rotation tracking detection mechanism 3 is arranged on the panel body, referring to fig. 9, the welding seam deviation ultrasonic detection mechanism 2 comprises a servo motor 31, a hollow shaft, a synchronous belt 35, a flange plate 38 and an eddy current probe 310, the flange plate 38 is connected with the hollow shaft, the eddy current probe 310 is connected to the flange plate 38, one end of the synchronous belt 35 is in transmission connection with the hollow shaft, the other end of the synchronous belt is driven by the servo motor 31, a steel pipe to be tested enters the inside of the hollow shaft through the pore passage, the servo motor 31 acquires an instruction sent by a microprocessor in real time, and the eddy current probe 310 deflects a corresponding angle, so that the welding seam on the steel pipe to be tested is tracked and detected. The eddy current probe 310 is arranged on the disc surface of the flange plate 38 along the radial direction of the flange plate 38, and the distance between the eddy current probe 310 and the steel pipe to be tested is less than 0.2mm in the process that the steel pipe to be tested enters the hollow shaft. The flange 38 is provided with a stroke cylinder 39 along the radial direction of the flange 38, the telescopic rod of the stroke cylinder 39 is connected with the eddy current probe 310, and the distance between the eddy current probe 310 and the steel pipe to be tested is controlled through the stroke cylinder 39.
The invention test flow and mechanism
After the welding seam of the steel pipe is polished, the outer surface of the welding seam is flush with the base metal, and the welding seam and the base metal cannot be distinguished through direct observation, so that the accurate position of the welding seam is difficult to determine. According to the invention, the acoustic impedance difference between the welding seam material and the parent metal is utilized, the ultrasonic wave generates pulse echo when being transmitted to the joint surface of the welding seam and the parent metal in the pipe wall, the distance from the joint surface to the probe can be determined according to the echo waveform, and then the specific deflection angle of the welding seam is calculated, and fig. 4 is an echo schematic diagram.
In the embodiment, firstly, a pair of ultrasonic straight probes is arranged on two sides of the vertical middle axial surface of the welded pipe, the center frequency is 5MHz, the signal receiving mode is self-generating and self-receiving, and meanwhile, the offset angle between an ultrasonic incident point and the vertical middle axial surface of the welded pipe is 20 degrees +/-1 degrees, and the offset area of the welding seam is ensured to be covered. Single-pass transmission from incident point of ultrasonic outer wall to inner wall of welded pipeThe playing time is recorded as t0When the wall thickness of the welded pipe is constant, t0Is a constant. Recording the one-way propagation time from the incident point of the outer wall of the ultrasonic wave to the joint surface of the welding line and the parent metal as T, wherein the one-way propagation time on the left side is recorded as TLRight one-way travel time is denoted as TR. During detection, two ultrasonic probes work simultaneously, ultrasonic reflection echo signals of the two sides of the same welding line and the joint surface of the base material are detected respectively, and one-way propagation time T is calculatedLAnd TR. When T isL>TROr when the left side has no reflection echo, the welding seam is positioned on the right side of the vertical middle axial surface of the welded pipe, namely the welding seam is close to the right ultrasonic probe; when T isL<TROr when no reflection echo exists on the right side, the welding seam is positioned on the left side of the vertical middle axial surface of the welded pipe, namely the welding seam is close to the left ultrasonic probe; when T isL＝TRWhen the welding seam is welded, the welding seam is overlapped with the vertical middle axial plane of the welded pipe, namely the welding seam is not deviated, and the distance between the welding seam and the probes on the two sides is equal.
Taking the detection of the ultrasonic probe on the right side of the vertical central axis surface of the welded pipe as an example, the propagation diagram is shown in fig. 5.
1、0＜TR/t0When the angle is less than 1, the welding seam is close to the right probe and is positioned in the sound path from the incident point of the outer wall of the ultrasonic wave to the reflection point of the inner wall of the welded tube.
And setting the point O as the central point of the section of the welded pipe, the point B as the position of the joint surface reached by the ultrasonic wave, and the point C as the position of the inner wall of the welded pipe reached by the ultrasonic wave when the ultrasonic wave does not pass through the weld joint under normal conditions.
In △ OAC, α is the ultrasonic incident angle, β is the ultrasonic refraction angle, and the ultrasonic propagation law shows that:
so β is arcsin (c)Water (W)cSteelsinα)
In the formula, cWater (W)，cSteelThe sound velocity of longitudinal waves in water and the sound velocity of longitudinal waves in welded pipes are respectively.
By the sine theorem:
because of the fact that
So that theta is 180- ∠ ACO- β
And then to
In △ OAB, AB ═ TR*cSteel。
Because of the fact that
Therefore, it is not only easy to use
And then to
Further:
2、1＜TL/t0when the time is less than 2, the welding seam is close to the left probe, and the joint surface of the welding seam and the base metal is positioned in the sound path from the first reflection point of the inner wall of the welded pipe to the outer wall of the welded pipe.
And setting the point D as the position of the ultrasonic wave reaching the joint surface, and setting the point E as the position of the inner wall of the welded pipe, which is reached when the ultrasonic wave does not pass through the welding line under the normal condition.
The reflection rule and the geometric relation are ∠ ACO ∠ DEO
In △ DEO
Because DE ═ TL-t)*cSteel
Therefore, it is not only easy to use
Further derived from the reflection law and geometric relationship:
i.e. the corresponding deflection angle of the weld seam in the event of such an offset
The deflection angles of other positions can be obtained by calculating according to the method.
Specific operating procedure
The detection device in the embodiment is composed of three parts, namely a mechanism mounting and positioning plate 1, a welding seam deviation ultrasonic detection mechanism 2 and an eddy current probe rotation tracking detection mechanism 3, as shown in fig. 6 and 7. The mechanism installation and positioning plate 1, the welding seam deviation ultrasonic detection mechanism 2 and the eddy current probe rotation tracking detection mechanism 3 are in an integrated linkage mode in the specific operation process, but in order to express the operation details of each part more clearly, the following contents are respectively explained from the three parts.
Wherein, mechanism's installation and locating plate 1 is as shown in fig. 6, and mechanism's installation and locating plate 1 includes: the device comprises a first bolt 11, a first vertical roller 12, a first handle 13, a second vertical roller 14, a first bearing plate 15, a first bearing block 16, a second bolt 17, a third vertical roller 18, a second handle 19, a fourth vertical roller 110, a second bearing block 111, a second bearing plate 112 and a welding platform 113.
During specific operation, the stainless steel welded pipe penetrates through the detection device and moves linearly at a constant speed, the first vertical roller 12 and the third vertical roller 18 are enabled to compress the steel pipe in the y-axis direction by adjusting the first bolt 11 and the second bolt 17, the steel pipe does not move left and right, the rollers are connected with the support through the shafts, and the bottom of the support is fixed on a welding machine platform through bolts. And the first handle 13 and the second handle 19 are adjusted to enable the second vertical roller 14 and the fourth vertical roller 110 to press the steel pipe in the z-axis direction, so that the steel pipe can be prevented from moving up and down in the moving process. The handle is arranged on the support and fixed on the second bearing block 111 through bolts, the two ends of the roller are respectively provided with a first bearing block 16, the first bearing block is provided with a first bearing plate 15 and a second bearing plate 112, and the shaft is assembled in the first bearing block and is respectively connected with the roller on the inner side of the bearing pressing plate and the universal joint coupler on the outer side of the bearing pressing plate, power can be provided for the roller to enable the roller to rotate at the same rotating speed, so that the steel pipe is pushed to move at a constant speed, the first bearing block 16 is tightly assembled on the support, and the bottom of the support is fixed on a welding machine platform 113 through. Therefore, the rollers not only can play a role in assisting centering, but also can ensure that the steel pipe does linear motion along the x-axis direction when passing through the position of the detection device.
The ultrasonic weld bead displacement detecting mechanism 2 is shown in fig. 6 and 8, and comprises: the ultrasonic probe comprises a water tank 21, a first drain pipe 22, a second drain pipe 23, a support 24, a first sealing ring 25, a second sealing ring 26, an arc-shaped probe mounting plate 27 and an ultrasonic probe 28.
During specific operation, the water tank 21 contains a certain amount of tap water, and the amount of the tap water is based on the standard that the tap water overflows the steel pipe and the ultrasonic detection sensor is immersed in the tap water. Tap water in the groove is discharged and replaced once a day through the first water discharge pipe 22 and the second water discharge pipe 23, and impurities can be effectively removed through the first water discharge pipe 22 arranged at the bottom of the water tank, so that the influence of the impurities in the water on the acquisition of effective ultrasonic detection signals can be prevented. The bottom of the water tank box is fixed on the bracket 24 by bolts, the water tank box is formed by welding all combination positions, all parts of the bracket are welded into a whole, and the bracket 24 is fixed on the welding machine platform 113 by bolts. The positions of the steel pipes penetrating into and out of the water tank are sealed by a first sealing ring 25 and a second sealing ring 26, so that water is prevented from flowing outwards. When the stainless steel welded pipe completely passes through two sides of the water tank, tap water can be directly filled through the top of the water tank, so that the requirement of ultrasonic detection is met. The arc-shaped probe mounting plate 27 is fixed with the brackets on the two sides of the water tank through bolts, and the mounting height of the arc-shaped probe mounting plate 27 is 5mm higher than the top of the water tank and is used for mounting and fixing two ultrasonic probes 28 so as to detect the deviation condition of a welding line. The ultrasonic probe excites signals to track the welding seam of the stainless steel welded pipe, after the ultrasonic probe receives echo signals, the microprocessor calculates the time of the echo signals, calculates the position and the offset angle of the welding seam, and transmits information representing the position and the offset angle of the welding seam to the eddy current probe rotation tracking detection mechanism 3 after signal processing.
As shown in fig. 9, the eddy current probe rotation tracking detection mechanism 3 includes: the device comprises a servo motor 31, a coupler 32, a third bearing seat 33, a synchronous wheel 34, a synchronous belt 35, a fourth bearing seat 36, a synchronous wheel 37, a flange 38, a stroke cylinder 39, an eddy current probe 310, a guide post 311 and a spring 312.
In specific operation, when TL≠TRWhen the servo motor 31 is operated, the synchronizing wheel 34 mounted on the bearing block 33 is driven to rotate by the coupling 32, and then the synchronizing wheel 34 is driven to rotate by the synchronizing belt 35 at the synchronizing wheel 37 of the bearing block 36. The hollow shaft is assembled in the fourth bearing seat 36, the hollow shaft is limited between the two bearing seats through a shaft shoulder and a bearing, the synchronizing wheel 37 is fixed with the hollow shaft through a key and a key slot, the flange 38 is fixed on the hollow shaft through a bolt, the synchronizing wheel 37 drives the hollow shaft to move so as to drive the flange 38 to rotate together, at the moment, the stroke cylinder 39 drives the eddy current probe 310 installed on the axial surface vertical to the longitudinal direction of the welded pipe to rotate in a corresponding offset direction and angle under the drive of the flange 38, and referring to fig. 10, the welded seam is enabled to be in the effective detection range of the eddy current probe. When the probe moves to a corresponding position, the stroke adjusting cylinder 39 moves downwards, so that the distance between the eddy current probe 310 and the welded pipe is kept within 0.2mm and the probe cannot be in contact with the welded pipe, the spring 312 arranged on the guide post 311 can eliminate the false alarm phenomenon of the weld defects caused by the vertical shaking of the probe under the action of elastic force, and finally, the tracking flaw detection of the offset weld defects can be realized. After the data processing system finishes processing the eddy current signal, the eddy current probe automatically moves to a plane vertical to the longitudinal middle axis of the welded pipe under the driving of the flange plate.
In specific operation, when TL＝TRIn the process, the distance between the eddy current probe 310 and the welded pipe is kept within 0.2mm by adjusting the adjustable stroke cylinder 39, and the eddy current probe cannot be in contact with the welded pipe, so that the flaw detection is carried out on the welded seam. All devices are mounted on the welding platform 113.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides a stainless steel argon arc welds pipe welding seam defect vortex on-line tracking detection device which characterized in that includes:
the mounting and positioning plate (1) comprises a panel body and a positioning assembly, wherein the positioning assembly comprises a plurality of vertical rollers, and the vertical rollers extrude and limit the steel pipe to be tested;
the welding seam deviation ultrasonic detection mechanism (2) is arranged on the panel body, the welding seam deviation ultrasonic detection mechanism (2) comprises a water tank (21), an ultrasonic probe (28) and a microprocessor, a pore canal penetrating through the water tank (21) along the x direction is formed in the water tank (21), the ultrasonic probe (28) is arranged on two sides of the pore canal, a steel pipe to be tested is sent into the pore canal by a positioning component, a signal excited by the ultrasonic probe (28) tracks the welding seam of the stainless steel welding pipe, and after the ultrasonic probe (28) receives an echo signal, the microprocessor calculates the time of the echo signal and calculates the position and the deviation angle of the welding seam;
eddy current probe rotates and trails detection mechanism (3), locates the panel body on, welding seam skew ultrasonic testing mechanism (2) include servo motor (31), hollow shaft, hold-in range (35), ring flange (38) and eddy current probe (310), ring flange (38) be connected with the hollow shaft, eddy current probe (310) connect in ring flange (38) on, hold-in range (35) one end with the hollow shaft transmission connect, the other end is driven by servo motor (31) transmission, the steel pipe via of awaiting measuring the examination the pore get into the inside of hollow shaft, servo motor (31) acquire the instruction that is sent by microprocessor in real time to make eddy current probe (310) deflect corresponding angle, with this tracking and detect the welding seam on the steel pipe of awaiting measuring.
2. The eddy current online tracking detection device for the weld defects of the stainless steel argon arc welding round welded pipe according to claim 1, wherein the positioning assembly comprises a first vertical roller (12), a second vertical roller (14), a third vertical roller (18) and a fourth vertical roller (110), the first vertical roller (12) and the third vertical roller (18) provide y-direction extrusion limit for the steel pipe to be tested penetrating through the first vertical roller and the second vertical roller, and the second vertical roller (14) and the fourth vertical roller (110) provide z-direction extrusion limit for the steel pipe to be tested penetrating through the second vertical roller and the fourth vertical roller.
3. The device for detecting the eddy current tracking of the weld defects of the stainless steel argon arc welded round welded pipe according to claim 2, wherein the first vertical roll (12), the second vertical roll (14), the third vertical roll (18) and the fourth vertical roll (110) are respectively composed of two rolls, a shaft penetrating through the two rolls and a bracket, and the shaft is arranged on the bracket.
4. The device for eddy current tracking and detecting the weld defect of the stainless steel argon arc welded round welded pipe according to claim 3, wherein each roller is provided with a concave arc surface matched with the steel pipe to be tested.
5. The device for eddy current tracking and detecting the weld defect of the stainless steel argon arc welded round welded pipe according to claim 3, wherein the shaft can be driven by power equipment, so that the rollers are driven together, and the extrusion and the steel pipe to be tested between the two rollers perform linear displacement in the x direction.
6. The eddy current online tracking and detecting device for the weld defects of the stainless steel argon arc welding circular welded pipe according to claim 1, wherein sealing rings matched with the steel pipe to be tested are arranged at two ends of the pore channel, so that water in the water tank (21) can overflow the steel pipe to be tested.
7. The eddy current online tracking detection device for the weld defects of the stainless steel argon arc welding circular welded pipe according to claim 1, characterized in that a probe mounting plate (27) is arranged at the top of the water tank (21), and the two ultrasonic probes (28) are connected to the probe mounting plate (27).
8. The device for detecting the eddy current tracking of the weld defect of the stainless steel argon arc welded round welded pipe according to claim 1, wherein the microprocessor calculates the time of the echo signal, calculates the weld azimuth and the offset angle, obtains the weld azimuth and the offset angle after signal processing, converts the weld azimuth and the offset angle into the number of turns and the direction of rotation of the output shaft of the servo motor (31), and finally converts the information into an electric signal to be sent to the servo motor (31).
9. The device for online tracking and detecting the weld defect of the stainless steel argon arc welding circular welded pipe according to claim 1, wherein the eddy current probe (310) is arranged on the disc surface of the flange plate (38) along the radial direction of the flange plate (38), and the distance between the eddy current probe (310) and the steel pipe to be tested is less than 0.2mm in the process that the steel pipe to be tested enters the hollow shaft.
10. The eddy current online tracking detection device for the weld defects of the stainless steel argon arc welding round welded pipe according to claim 9, characterized in that a stroke cylinder (39) is arranged on the flange plate (38) along the radial direction of the flange plate (38), an expansion rod of the stroke cylinder (39) is connected with the eddy current probe (310), and the distance between the eddy current probe (310) and the steel pipe to be tested is controlled through the stroke cylinder (39).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607810A (en) * | 2021-07-02 | 2021-11-05 | 上海应用技术大学 | Online ultrasonic flaw detection device for defects of thin-wall metal straight-seam circular welded pipe |
| CN113607810B (en) * | 2021-07-02 | 2024-04-23 | 上海应用技术大学 | Online ultrasonic flaw detection device for defects of thin-wall metal straight-seam circular welded pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325809A (en) * | 1998-05-21 | 1999-11-26 | Nkk Corp | Welding bead center position detector |
| CN1409107A (en) * | 2001-09-29 | 2003-04-09 | 中国科学院金属研究所 | Supersonic and eddy composite automatic detector for pipe |
| CN101144826A (en) * | 2007-11-07 | 2008-03-19 | 钢铁研究总院 | Heavy caliber seamless steel pipe supersonic and vortex combined automatic detection device and uses |
| US20090132181A1 (en) * | 2007-08-16 | 2009-05-21 | Girndt Richard J | System and method for detecting flaws in welded tubulars |
| CN102121923A (en) * | 2009-10-09 | 2011-07-13 | 奥林巴斯Ndt公司 | Weld seam tracking system using phased array ultrasonic devices |
| CN103901100A (en) * | 2014-03-25 | 2014-07-02 | 深圳市神视检验有限公司 | Ultrasonic flaw detection defect location method and ultrasonic flaw detector |
| CN205826600U (en) * | 2016-06-22 | 2016-12-21 | 越策联合（厦门）检测科技有限公司 | The saddle type probe eddy current testing device to steel pipe seam |
-
2019
- 2019-11-12 CN CN201911100776.XA patent/CN110887896B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11325809A (en) * | 1998-05-21 | 1999-11-26 | Nkk Corp | Welding bead center position detector |
| CN1409107A (en) * | 2001-09-29 | 2003-04-09 | 中国科学院金属研究所 | Supersonic and eddy composite automatic detector for pipe |
| US20090132181A1 (en) * | 2007-08-16 | 2009-05-21 | Girndt Richard J | System and method for detecting flaws in welded tubulars |
| CN101144826A (en) * | 2007-11-07 | 2008-03-19 | 钢铁研究总院 | Heavy caliber seamless steel pipe supersonic and vortex combined automatic detection device and uses |
| CN102121923A (en) * | 2009-10-09 | 2011-07-13 | 奥林巴斯Ndt公司 | Weld seam tracking system using phased array ultrasonic devices |
| CN103901100A (en) * | 2014-03-25 | 2014-07-02 | 深圳市神视检验有限公司 | Ultrasonic flaw detection defect location method and ultrasonic flaw detector |
| CN205826600U (en) * | 2016-06-22 | 2016-12-21 | 越策联合（厦门）检测科技有限公司 | The saddle type probe eddy current testing device to steel pipe seam |
Non-Patent Citations (2)
| Title |
|---|
| ZHENMAO CHEN ET AL.: "Enhancements of eddy current testing techniques for quantitative nondestructive testing of key structural components of nuclear power plants", 《NUCLEAR ENGINEERING AND DESIGN》 * |
| 董莉: "钢领域无损检测标准体系解析", 《理化检验(物理分册)》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113607810A (en) * | 2021-07-02 | 2021-11-05 | 上海应用技术大学 | Online ultrasonic flaw detection device for defects of thin-wall metal straight-seam circular welded pipe |
| CN113607810B (en) * | 2021-07-02 | 2024-04-23 | 上海应用技术大学 | Online ultrasonic flaw detection device for defects of thin-wall metal straight-seam circular welded pipe |
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