CN111624253A - Online ultrasonic flaw detection method for square steel - Google Patents
Online ultrasonic flaw detection method for square steel Download PDFInfo
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- CN111624253A CN111624253A CN202010472476.0A CN202010472476A CN111624253A CN 111624253 A CN111624253 A CN 111624253A CN 202010472476 A CN202010472476 A CN 202010472476A CN 111624253 A CN111624253 A CN 111624253A
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- 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
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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
- G01N29/225—Supports, positioning or alignment in moving situation
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- 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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- 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
- G01N29/27—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the material relative to a stationary sensor
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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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- 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
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- G01N2291/10—Number of transducers
- G01N2291/106—Number of transducers one or more transducer arrays
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
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Abstract
The invention relates to an online ultrasonic flaw detection method for square steel, which comprises the following steps of 1) arranging an active V-shaped roller way and a passive V-shaped roller way in a square steel detection area; 2) an inlet guide and protection device, an inlet anti-bouncing and vibrating device, a main body frame, an outlet anti-bouncing and vibrating device and an outlet guide and protection device are sequentially arranged in the flaw detection area from an inlet to an outlet, so that the central line of the square steel is consistent with the central line of a square steel flaw detection system fixed on the main body frame; 3) a1 # encoder device, a square steel 1-surface combined type probe lifting device, a square steel 2-surface combined type probe lifting device, a square steel 3-surface combined type probe lifting device, a square steel 4-surface combined type probe lifting device and a 2# encoder device are sequentially arranged in the main body frame in the advancing direction of the square steel in a vertically inclined manner of 45 degrees. The advantages are that: the square steel jumping and high-frequency vibration in the detection process can be eliminated, and the smooth running of the 90-154# square steel in and out of the ultrasonic flaw detection area of the square steel is realized.
Description
Technical Field
The invention belongs to the field of nondestructive inspection of square steel, and particularly relates to an online ultrasonic inspection method for square steel.
Background
The square steel produced by the factory adopts manual towbar type ultrasonic flaw detection, the coupling effect of the probe and the square steel is poor, and the detection sensitivity fluctuation is large, so that the detection omission is easily caused. And (4) manual towing rod type flaw detection, wherein ultrasonic coverage gaps exist between every two scanning and inspection, and an ultrasonic flaw detection blind area is formed. Meanwhile, the coverage area of the ultrasonic waves can only reach about 30% of the full section. The existing ultrasonic probe and instrument combination for artificial flaw detection has low sensitivity and signal-to-noise ratio, and the flaw detection difficulty is high because the flaw waves with thick and solid waveforms are searched in clutter for judging the flaws manually by naked eyes.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an online ultrasonic flaw detection method for square steel, which realizes the online ultrasonic flaw detection of 90-154# square steel, improves the ultrasonic coverage area and the flaw detection accuracy of the square steel section and meets the requirements of the ultrasonic flaw detection of the square steel.
In order to achieve the purpose, the invention is realized by the following technical scheme:
an online ultrasonic flaw detection method for square steel comprises the following steps:
1) arranging an active V-shaped roller way and a passive V-shaped roller way in the square steel detection area, and sending the square steel into and out of the flaw detection area, wherein the sending speed and the sending speed are controlled within 1 m/s;
2) an inlet guide and protection device, an inlet anti-bounce and vibration device, a main body frame, an outlet anti-bounce and vibration device and an outlet guide and protection device are sequentially arranged in the flaw detection area from an inlet to an outlet, so that the central line of square steel is consistent with the central line of a square steel flaw detection system fixed on the main body frame, and the square steel with bouncing, vibration and bending exceeding standards in the process of detecting the square steel is prevented from entering the flaw detection system to damage flaw detection equipment;
3) a1 # encoder device, a square steel 1-surface combined type probe lifting device, a square steel 2-surface combined type probe lifting device, a square steel 3-surface combined type probe lifting device, a square steel 4-surface combined type probe lifting device and a 2# encoder device are sequentially arranged on a main body frame in the advancing direction of square steel in a vertically inclined manner of 45 degrees;
when square steel enters the corresponding area of the device, the speed measuring wheel of the 1# encoder device, the combined probe of the 1-4-surface combined probe lifting device of the square steel and the speed measuring wheel of the 2# encoder device are sequentially pressed on the corresponding detected surface of the square steel;
the speed measuring wheels of the 1# and 2# encoder devices rotate under the driving of the forward or backward movement of the square steel, so that the length measurement of the square steel and the positioning of the defects in the length direction of the square steel are realized; and (3) carrying out ultrasonic flaw detection on four sides of the square steel by using a 1-4-surface combined type probe lifting device of the square steel.
In step 3), a speed measuring wheel of the 1# encoder device and a combined probe of the square steel 1-surface combined probe lifting device are pressed on the left surface of the square steel; a speed measuring wheel of the 2# encoder device and a combined probe of the square steel 2-surface combined probe lifting device are pressed on the right side of the square steel; the combined probe of the square steel 3-surface combined probe lifting device is pressed on the lower right surface of the square steel; the combined probe of the square steel 4-surface combined probe lifting device is pressed on the lower left surface of the square steel.
Entry direction and protection device, export direction is the same with the protection device structure, all include the main frame, the bracket, go up the slide rail, square steel profile modeling deflector roll, lead screw nut mechanism, go up the deflector roll base, deflector roll base down, the bearing frame, fixedly connected with bracket on the main frame, go up the slide rail, go up slide rail and last deflector roll base sliding connection, square steel profile modeling deflector roll top is through bearing frame and last deflector roll base fixed connection, the bottom is through bearing frame and deflector roll base fixed connection down, lower deflector roll base is connected with lead screw nut mechanism, two profile modeling deflector rolls move on the bracket through two lead screw nut mechanism drives respectively.
The screw rod and nut mechanism comprises a screw rod, a screw sleeve and a hand wheel, the screw sleeve is connected with the bracket in a sliding way, the screw rod is in threaded connection with the screw sleeve, the end part of the screw rod is fixedly connected with the hand wheel, and the screw rod is connected with the main frame through a bearing; the two sets of screw rod and nut mechanisms are arranged oppositely, and the screw rod is respectively provided with a left-handed thread and a right-handed thread.
The inlet anti-bouncing vibration device and the outlet anti-bouncing vibration device have the same structure and respectively comprise a frame and an anti-bouncing vibration mechanism, and the anti-bouncing vibration mechanism comprises a lifting cylinder, a connecting frame, a linear bearing, a linear guide rail, a damping spring, a bearing seat and a rubber roller; the top of the frame is fixedly connected with a lifting cylinder, a piston rod extending out of the bottom of the lifting cylinder is connected with a connecting frame, the connecting frame is fixedly connected with a linear bearing, a linear guide rail is connected with the linear bearing in a sliding manner, and the linear guide rail is fixedly connected with the frame; the connecting frame is connected with the bearing seat mounting plate through a guide rod, a damping spring is sleeved outside the guide rod, the bottom of the damping spring abuts against the bearing seat mounting plate, the top of the damping spring abuts against the connecting frame, and the guide rod is connected with the connecting frame through a nut; the bearing seat mounting plate is fixedly connected with a bearing seat, and a rubber roller is mounted on the bearing seat.
The square steel 1-4 combined type probe lifting devices have the same structure and respectively comprise a probe lifting mounting plate, a four-bar mechanism, a probe lifting driving cylinder, a probe lifting cylinder, a lead screw nut transmission mechanism, a combined probe, a positioning rubber wheel and a mounting plate;
the probe lifting mounting plate is provided with a four-bar mechanism, a probe lifting driving cylinder, a piston rod of the probe lifting driving cylinder is connected with the four-bar mechanism, the probe lifting driving cylinder drives the four-bar mechanism to move, the four-bar mechanism is connected with a positioning rubber wheel and a lead screw nut transmission mechanism through the mounting plate, the lead screw nut transmission mechanism is connected with the probe lifting cylinder, the probe lifting cylinder drives a combined probe to reciprocate, the positioning rubber wheel and the combined probe are perpendicular to each other and are respectively supported on two adjacent faces of square steel.
Compared with the prior art, the invention has the beneficial effects that:
the square steel online ultrasonic flaw detection method can eliminate the bounce and high-frequency vibration of the square steel in the detection process, and realize the smooth running of the 90-154# square steel in and out of the square steel ultrasonic flaw detection area. The up-and-down jumping and the transverse swinging displacement in the running process of the square steel are supplemented in real time, the real-time coupling of the surfaces of the square steel by a plurality of groups of probes is ensured, and the accuracy of ultrasonic flaw detection of the square steel is improved. Meanwhile, four groups of square steel combined probes are arranged on four sides of the square steel, the ultrasonic coverage rate of the section of the square steel is more than or equal to 80%, and the ultrasonic flaw detection accuracy of the square steel is improved.
Drawings
FIG. 1 is a front view of a square steel detection zone.
FIG. 2 is a top view of a square steel detection zone.
Fig. 3 is a schematic view of the structure of the inlet or outlet guide and protection device.
Fig. 4 is a schematic structural diagram of an inlet or outlet anti-bounce and shock device.
Fig. 5 is a schematic structural diagram of the anti-bounce and shock-proof mechanism.
Figure 6 is a front view of a combination probe landing gear.
Figure 7 is a side view of a combination probe landing gear.
FIG. 8 is a schematic diagram of the structure of a three-combination probe.
FIG. 9 is a schematic diagram of the structure of a four-combination probe.
Fig. 10 is a cross-sectional view taken along line a-a of fig. 8.
Fig. 11 is a schematic view of the connection of the outer frame to the rotation shaft.
Figure 12 is a schematic view of the arrangement of the encoder device and combined probe landing gear on a square steel surface.
Fig. 13 is a schematic configuration diagram of an encoder device.
In the figure: 1-square steel 2-inlet guide and protection device 3-inlet anti-bouncing vibration device 4-1# encoder device 5-square steel 1 surface combined type probe lifting device 6-square steel 2 surface combined type probe lifting device 7-square steel 3 surface combined type probe lifting device 8-square steel 4 surface combined type probe lifting device 9-2# encoder device 10-outlet anti-bouncing vibration device 11-outlet guide and protection device 12-active V-shaped roller 13-passive V-shaped roller 14-ultrasonic flaw detection remote debugging terminal 15-sewage sedimentation tank 16-overflow wall 17-clear water circulation tank 18-main body frame
21-upright column 22-cross beam 23-upper sliding rail 24-upper guide roller base 25-left hand wheel 26-lead screw 27-square steel profile modeling guide roller 28-bearing block 29-lower guide roller base 210-wire sleeve 211-bracket 212-right hand wheel 213-base
31-base 32-upright column 33-upper beam 34-main back plate 35-lifting cylinder 36-horizontal mounting plate 37-lifting vertical plate 38-piston rod 39-horizontal connecting plate 310-guide rod 311-vertical mounting plate 312-damping spring 313-bearing seat mounting plate 314-bearing seat 315-rubber roller 316-lower beam 317-linear bearing 318-linear guide rail
41-encoder lifting driving cylinder 42-encoder lifting mechanical arm 43-speed measuring wheel 44-code wheel speed measuring small rubber wheel 45-code wheel speed measuring small rubber wheel mechanical arm 46-code wheel 47-speed measuring wheel bearing
51-three-combination probe 52-four-combination probe 53-probe lifting cylinder one 54-probe lifting cylinder two 55-mounting plate 56-four-bar linkage 57-probe lifting mounting plate 58-probe lifting cylinder 59-lead screw nut transmission mechanism 510-limiting block 511-positioning rubber wheel 512-adjusting hand wheel 513-inner frame 514-ultrasonic probe core 515-connecting shaft 516-outer frame 517-rotating shaft 518-water gap 519-spring pressing sheet 520-guide sleeve 521-bolt 522-limiting sheet 523-connecting rod 524-connecting plate one 525-connecting plate two.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
Referring to fig. 1-2, an online ultrasonic flaw detection method for square steel comprises the following steps:
1) five groups of active V-shaped roller ways and two groups of passive V-shaped roller ways are arranged in the square steel detection area and are used for sending the square steel into and out of the flaw detection area, the sending speed and the sending speed are controlled within 1m/s, the low-speed reciprocating motion of the square steel in the detection area is realized, and the production detection, the online debugging and the rechecking are realized; the driving V-shaped roller way is arranged at the inlet, the outlet and the middle part of the square steel detection area, and the driven V-shaped roller way is arranged between the driving V-shaped roller ways;
2) an inlet guide and protection device, an inlet anti-bounce and vibration device, a main body frame, an outlet anti-bounce and vibration device and an outlet guide and protection device are sequentially arranged in the flaw detection area from an inlet to an outlet, so that the central line of square steel is consistent with the central line of a square steel flaw detection system fixed on the main body frame, and the square steel with bouncing, vibration and bending exceeding standards in the process of detecting the square steel is prevented from entering the flaw detection system to damage flaw detection equipment;
3) a1 # encoder device, a square steel 1-surface combined type probe lifting device, a square steel 2-surface combined type probe lifting device, a square steel 3-surface combined type probe lifting device, a square steel 4-surface combined type probe lifting device and a 2# encoder device are sequentially arranged on a main body frame in the advancing direction of square steel in a vertically inclined manner of 45 degrees; the 1# encoder device and the 2# encoder device can adopt a meter counter and can also be manufactured by themselves, as shown in figure 13.
When square steel enters the corresponding area of the device, the speed measuring wheel of the 1# encoder device, the combined probe of the 1-4-surface combined probe lifting device of the square steel and the speed measuring wheel of the 2# encoder device are sequentially pressed on the corresponding detected surface of the square steel;
the speed measuring wheels of the 1# and 2# encoder devices rotate under the driving of the forward or backward movement of the square steel, so that the length measurement of the square steel and the positioning of the defects in the length direction of the square steel are realized; ultrasonic flaw detection is carried out on four sides of the square steel by using the square steel 1-4 combined type probe landing gear, the straight line sections of the four sides of the square steel are completely covered in a gapless mode, and the ultrasonic coverage area of the section of the square steel with the specification of 90-154# is ensured to be more than or equal to 80%.
In step 3), a speed measuring wheel of the 1# encoder device and a combined probe of the square steel 1-surface combined probe lifting device are pressed on the left surface of the square steel; a speed measuring wheel of the 2# encoder device and a combined probe of the square steel 2-surface combined probe lifting device are pressed on the right side of the square steel; the combined probe of the square steel 3-surface combined probe lifting device is pressed on the lower right surface of the square steel; the combined probe of the square steel 4-surface combined probe lifting device is pressed on the lower left surface of the square steel.
Referring to fig. 3, the entrance or exit guide and protection device has the same structure and comprises a main frame, a bracket 211, an upper slide rail 23, a square steel profiling guide roller 27, a screw nut mechanism, an upper guide roller base 24, a lower guide roller base 29 and a bearing seat 28, wherein the main frame is fixedly connected with the bracket 211 and the upper slide rail 23, the upper slide rail 23 is slidably connected with the upper guide roller base 24, the top of the square steel profiling guide roller 27 is fixedly connected with the upper guide roller base 24 through the bearing seat 28, the bottom of the square steel profiling guide roller is fixedly connected with the lower guide roller base 29 through the bearing seat 28, the lower guide roller base 29 is connected with the screw nut mechanism, and the two profiling guide rollers are driven by the two screw nut.
Referring to fig. 3, the main frame includes upright posts 21, cross beams 22, and a base 213, the bottom end of the upright posts 21 is fixedly connected with the base 213, the top of the upright posts 21 is fixedly connected with the cross beams 22, the upper portions of the upright posts 21 are fixedly connected with the upper slide rails 23, and the lower portions of the upright posts 21 are fixedly connected with the brackets 211.
Referring to fig. 3, the screw nut mechanism includes a screw 26, a screw sleeve 210 and a hand wheel, the screw sleeve 210 is slidably connected with a bracket 211, the screw 26 is in threaded connection with the screw sleeve 210, the hand wheel is fixedly connected with the end of the screw 26, and the screw 26 is connected with the main frame through a bearing; the two sets of screw nut mechanisms are arranged oppositely, and the screw 26 is respectively provided with left-handed threads and right-handed threads. The top of the upper guide roller base 24 is provided with a sliding chute, and the sliding chute is correspondingly arranged on the upper sliding rail 23 to realize the sliding of the upper guide roller base 24 and the upper sliding rail 23.
See fig. 3, square steel profile modeling deflector roll 27 can be two round platforms that the structure is the same butt joint fixed, and the butt joint department is equipped with the recess, and the generating line contained angle of round platform is 90 degrees, and the generating line is 45 degrees with the contained angle of horizontal plane, and the side and groove portion of going up of square steel profile modeling deflector roll 27 can restrict the upper and lower bending and the horizontal crookedness standard square steel entering defectoscope, has reduced the wearing and tearing of the fillet of two horizontal directions to the guide roll simultaneously because of adopting the profile modeling design in the square steel operation process.
If square steel with different specifications enters the device, the left and right hand wheels 25 and 212 are rotated to drive the screw rods 26 to rotate, the screw sleeve 210 translates on the bracket 211 to drive the lower guide roller base 29 to translate, the thread directions of the two screw rods 26 are opposite, so that the position of the square steel can be transversely adjusted, the central line of the square steel is consistent with that of a square steel flaw detector, the distance between the end edges of the left and right sides of the square steel and the grooves on the square steel profiling guide roller 27 is less than or equal to 20mm, the left and right hand wheels 25 and 212 are locked, a set of guiding and protecting device is respectively arranged at the inlet and the outlet of a square steel detection area, the square steel is limited when the square steel is subjected to online flaw detection, the effective guiding and protecting of incoming square steel and outgoing square steel are realized, the running smoothness of the square steel in the detection process is improved, and the square steel with excessive bending is prevented from colliding with the square steel ultrasonic.
Referring to fig. 4 and 5, the inlet anti-bounce and anti-shock device and the outlet anti-bounce and anti-shock device have the same structure and respectively comprise a frame and an anti-bounce and anti-shock mechanism, wherein the anti-bounce and anti-shock mechanism comprises a lifting cylinder 35, a connecting frame, a linear bearing 317, a linear guide rail 318, a damping spring 312, a bearing seat 314 and a rubber roller 315; the frame top fixedly connected with lift cylinder 35, the piston rod 38 that stretches out bottom lift cylinder 35 is connected with the link, link and linear bearing 317 fixed connection, linear guide 318 and linear bearing 317 sliding connection, linear guide 318 and frame fixed connection, linear bearing 317 can make the motion of link more stable to with this motion restriction in vertical direction. The connecting frame is connected with the bearing seat mounting plate 313 through a guide rod 310, a damping spring 312 is sleeved outside the guide rod 310, the bottom of the damping spring 312 abuts against the bearing seat mounting plate 313, the top of the damping spring 312 abuts against the connecting frame, the guide rod 310 is connected with the connecting frame through a nut, and the telescopic stroke of the damping spring 312 can be adjusted through the nut; the bearing seat mounting plate 313 is fixedly connected with a bearing seat 314, and a rubber roller 315 is mounted on the bearing seat 314.
Referring to fig. 4 and 5, the frame includes an upper beam 33, a lower beam 316, a vertical column 32 and a base 31, the base 31 is fixedly connected to the bottom end of the vertical column 32, the upper beam 33 is fixedly connected to the top of the vertical column 32, and the lower beam 316 is fixed to the lower portion of the vertical column 32. The main back plate 34 is fixed on the upper cross beam 33, the vertical mounting plate 311 and the horizontal mounting plate 36 are fixed in a mutually perpendicular manner, the vertical mounting plate 311 is fixedly connected to the main back plate 34, the linear guide rail 318 is fixed on the vertical mounting plate 311, the lifting cylinder 35 is fixed on the horizontal mounting plate 36, and the piston rod 38 penetrates through the horizontal mounting plate 36 to be connected with the connecting frame.
Referring to fig. 4 and 5, the connecting frame is composed of a lifting vertical plate 37 and a horizontal connecting plate 39 which are vertically fixed with each other, the lifting vertical plate 37 is fixedly connected with a linear bearing 317, and a piston rod 38 of the lifting cylinder 35 is connected with the horizontal connecting plate 39. To increase the strength of the connection, reinforcing ribs can be fastened between the lifting risers 37 and the horizontal webs 39. The bottom end of the guide rod 310 is fixedly connected with the bearing seat mounting plate 313, the top end of the guide rod 310 is provided with threads, the top end of the guide rod 310 penetrates through the connecting frame and is fixed through a nut, and two nuts can be connected to the guide rod 310 for convenient adjustment and positioning. The rubber roller 315 is a polyurethane rubber roller 315, and can also be other rubber rollers 315 with higher elasticity.
Referring to fig. 4 and 5, when the square steel 16 enters the anti-bouncing and vibrating device under the conveying of the V-shaped roller way, the compression roller vertically ascends and descends to drive the cylinder rod to extend out, so that the damping polyimide rubber roller 315 is pressed onto the square steel 16. When the square steel 16 jumps and vibrates in the running process, unstable jumps and vibrations are absorbed by the damping spring 312, and smooth running of the 90-154# square steel 16 in and out of the square steel detection area is realized.
Referring to fig. 6 and 7, the square steel 1-4 combined probe lifting device has the same structure and comprises a probe lifting mounting plate 57, a four-bar linkage 56, a probe lifting driving cylinder, a probe lifting cylinder 58, a screw nut transmission mechanism 59, a combined probe and a mounting plate 55; the probe lifting mounting plate 57 is provided with a four-bar linkage 56, and the probe lifting mounting plate 57 is movably hinged with the probe lifting driving cylinder. The piston rod of the probe lifting driving cylinder is connected with the four-bar linkage 56, the probe lifting driving cylinder drives the four-bar linkage 56 to move, the four-bar linkage 56 is connected with the positioning rubber wheel 511 and the screw nut transmission mechanism 59 through the mounting plate 55, the screw nut transmission mechanism 59 is connected with the probe lifting cylinder 58, the probe lifting cylinder 58 drives the combined probe to reciprocate, the end part of the piston rod of the probe lifting cylinder 58 is fixed with a limiting block 510, the limiting block 510 with a limiting groove is connected with the rotating shaft, the combined probe is driven to move by the limiting block 510, and the positioning rubber wheel 511 and the combined probe are perpendicular to each other and abut against two adjacent faces of the square steel respectively.
Referring to fig. 6 and 7, the screw nut transmission mechanism 59 includes a screw, a threaded sleeve and an adjusting hand wheel 512, the adjusting hand wheel 512 is fixed at the end of the screw, the screw is in threaded connection with the threaded sleeve, and the threaded sleeve is fixedly connected with the combined probe. The threaded sleeve of the screw nut transmission mechanism 59 is fixedly connected with the four-combined probe 52 or the three-combined probe 51, the threaded sleeve of the screw nut transmission mechanism 59 is fixedly connected with the four-combined probe 52 in fig. 6, the three-combined probe 51 is fixedly connected with the mounting plate 55, and at the moment, the distance between the four-combined probe 52 and the three-combined probe 51 is adjusted by rotating the adjusting hand wheel 512.
Referring to fig. 6, the four-bar linkage 56 includes a connecting rod 523, a first connecting plate 524, and a second connecting plate 525, the connecting rod 523, the first connecting plate 524, and the second connecting plate 525, which are arranged in parallel, form a parallelogram structure, two ends of the connecting rod 523 are movably hinged with the first connecting plate 524 and the second connecting plate 525, respectively, a piston rod of the probe rise and fall driving cylinder is hinged with the connecting rod 523, the first connecting plate 524 is fixedly connected with the probe rise and fall mounting plate 57, and the second connecting plate 525 is fixedly connected with the mounting plate.
Referring to fig. 8-11, the four-combination probe 52 comprises an ultrasonic probe core 514, an inner frame 513, an outer frame 516, a connecting shaft 515, a rotating shaft 517 and a spring pressing sheet 519, wherein more than three groups of ultrasonic probe cores 514 are arranged in the inner frame 513, the spring pressing sheet 519 is fixedly connected to the inner frame 513, the spring pressing sheet 519 is pressed on the ultrasonic probe cores 514, the inner frame 513 is of a cavity structure with water, a water gap 518 communicated with the cavity is arranged on the inner frame 513, and water can be injected into the inner frame 513 before use; the inner frame 513 is rotatably connected with the outer frame 516 through a connecting shaft 515, the outer frame 516 is rotatably connected with the rotating shaft 517, the connecting shaft 515 and the central shaft of the rotating shaft 517 are perpendicular to each other, so that the outer frame 516 and the inner frame 513 can rotate in two freedom directions in real time, and the surfaces of opposite steel of multiple groups of probes are attached in real time in the detection process. The surface of the ultrasonic probe core 514 is attached with a wear pad, the wear pad can be made of a thin steel plate, and the wear pad is directly contacted with square steel, so that the service life of the ultrasonic probe core 514 is prolonged.
Referring to fig. 6, the four combined probe 52 and the three combined probe 51 have similar structures and are respectively driven by the probe lifting cylinder 58-53 and the probe lifting cylinder 58-54, if the four combined probe 52 is changed into the three combined probe 51, the space where the two ultrasonic probe cores 514 are originally installed is occupied by the guide sleeve 520, and the third ultrasonic probe core 514 is placed in the guide sleeve 520, so that the same inner frame 513 can be used for installing the three ultrasonic probe cores 514 and also can be used for installing the four ultrasonic probe cores 514.
Referring to fig. 10 and 11, the outer walls of the connecting shaft 515 and the rotating shaft 517 are fixed with a limiting piece 522, the outer frame 516 is provided with a limiting groove, the limiting piece 522 is inserted into the groove, and the groove is used for limiting the rotating angles of the connecting shaft 515 and the rotating shaft 517, so that the connecting shaft 515 and the rotating shaft 517 can only freely rotate within a range of ± 10 °. The limiting groove can also be replaced by two separation blades which are separated by a certain distance. Limited real-time rotation of the outer frame 516 and the inner frame 513 in two degrees of freedom is achieved.
Referring to fig. 8-9, a spring pressing sheet 519 corresponds to each ultrasonic probe core 514, the spring pressing sheet 519 is fixed on the inner frame 513 through bolts 521, the spring pressing sheet 519 presses the upper surface of the ultrasonic probe core 514, when the ultrasonic probe core 514 is not in contact with the surface of square steel, the lower surface of the ultrasonic probe core 514 slightly extends out of the surface of the inner frame 513, when the ultrasonic probe core 514 is pressed down to the surface of the square steel, the spring pressing sheet 519 is jacked up to a certain extent, and when the square steel is instantaneously vibrated to a small extent and leaves the ultrasonic probe core 514, the spring pressing sheet 519 is instantaneously pressed down to supplement the displacement of the square steel instantaneous vibration. During flaw detection, coupling water is sprayed to a gap between a wear pad at the lower end of the ultrasonic probe core 514 and square steel through the water gap 518, and ultrasonic flaw detection of the square steel is achieved.
In addition, ultrasonic inspection remote debugging terminal 14 is fixed on main body frame 18 for the other debugging probe of equipment, the roll table control of being convenient for and ultrasonic parameter adjustment, the sewage that mixes the iron sheet after the detection is with iron sheet deposit in sewage sedimentation tank 15, alleviates sewage treatment pressure. Clear water at the top of the settled sewage in the sewage sedimentation tank 15 overflows the water overflowing wall 16, enters the clear water circulating tank 17, and is pumped by the water pump to enter the sewage treatment system. The water overflowing wall 16 is fixed between the sewage sedimentation tank 15 and the clean water circulating tank 17 and used for isolating clean water and sewage.
The 1# encoder device and the 2# encoder device respectively comprise an encoder lifting driving cylinder 41, an encoder lifting mechanical arm 42, a speed measuring wheel 43, a code wheel speed measuring small rubber wheel 44, a code wheel speed measuring small rubber wheel mechanical arm 45 with a compression spring, a code wheel 46 and a speed measuring wheel bearing 47; the piston rod of the encoder rising and falling driving cylinder 41 is hinged to the encoder rising and falling mechanical arm 42, the encoder rising and falling mechanical arm 42 is driven to fall, the speed measuring wheel 43 connected with the encoder rising and falling mechanical arm 42 is pressed on the square steel 1, the encoder rising and falling mechanical arm 42 is connected with the speed measuring wheel 43 through a speed measuring wheel bearing 47, the code disc speed measuring small rubber wheel mechanical arm 45 with a compression spring supports the code disc speed measuring small rubber wheel 44 on the speed measuring wheel bearing 47, the code disc speed measuring small rubber wheel mechanical arm 45 is provided with a code disc 46, and the code disc speed measuring small rubber wheel mechanical arm 45 rolls. The velocity measuring wheel 43 is made of a rubber wheel.
When the square steel enters the detection area, the probe lifting cylinder 58 drives the four-bar linkage 56 to obliquely fall by 45 degrees to press the three-combined probe 51, the four-combined probe 52 and the positioning rubber wheel 511 onto two adjacent detection surfaces of the square steel, so that ultrasonic online flaw detection is realized. When square steels with different specifications are detected, the position of a threaded sleeve fixedly connected with the four combined probes 52 can be adjusted by rotating the adjusting hand wheel 512, so that the size of the mutual overlapping area of the two groups of probes is changed, and 90-154# square steel full-specification flaw detection is realized.
The invention realizes the on-line ultrasonic flaw detection of the 90-154# square steel, improves the ultrasonic coverage area of the section of the square steel and the flaw detection accuracy rate, and meets the requirements of the YB4094-93 square steel ultrasonic flaw detection standard.
Claims (6)
1. An online ultrasonic flaw detection method for square steel is characterized by comprising the following steps:
1) arranging an active V-shaped roller way and a passive V-shaped roller way in the square steel detection area, and sending the square steel into and out of the flaw detection area, wherein the sending speed and the sending speed are controlled within 1 m/s;
2) an inlet guide and protection device, an inlet anti-bounce and vibration device, a main body frame, an outlet anti-bounce and vibration device and an outlet guide and protection device are sequentially arranged in the flaw detection area from an inlet to an outlet, so that the central line of square steel is consistent with the central line of a square steel flaw detection system fixed on the main body frame, and the square steel with bouncing, vibration and bending exceeding standards in the process of detecting the square steel is prevented from entering the flaw detection system to damage flaw detection equipment;
3) a1 # encoder device, a square steel 1-surface combined type probe lifting device, a square steel 2-surface combined type probe lifting device, a square steel 3-surface combined type probe lifting device, a square steel 4-surface combined type probe lifting device and a 2# encoder device are sequentially arranged on a main body frame in the advancing direction of square steel in a vertically inclined manner of 45 degrees;
when square steel enters the corresponding area of the device, the speed measuring wheel of the 1# encoder device, the combined probe of the 1-4-surface combined probe lifting device of the square steel and the speed measuring wheel of the 2# encoder device are sequentially pressed on the corresponding detected surface of the square steel;
the speed measuring wheels of the 1# and 2# encoder devices rotate under the driving of the forward or backward movement of the square steel, so that the length measurement of the square steel and the positioning of the defects in the length direction of the square steel are realized; and (3) carrying out ultrasonic flaw detection on four sides of the square steel by using a 1-4-surface combined type probe lifting device of the square steel.
2. The online ultrasonic flaw detection method for the square steel according to claim 1, wherein in the step 3), the speed measuring wheel of the 1# encoder device and the combined probe of the square steel 1-face combined probe lifting device are pressed on the left face of the square steel; a speed measuring wheel of the 2# encoder device and a combined probe of the square steel 2-surface combined probe lifting device are pressed on the right side of the square steel; the combined probe of the square steel 3-surface combined probe lifting device is pressed on the lower right surface of the square steel; the combined probe of the square steel 4-surface combined probe lifting device is pressed on the lower left surface of the square steel.
3. The method of claim 1, wherein the inlet guide and protection device and the outlet guide and protection device have the same structure and each comprise a main frame, a bracket, an upper slide rail, a square steel profiling guide roller, a screw nut mechanism, an upper guide roller base, a lower guide roller base and a bearing base, the main frame is fixedly connected with the bracket and the upper slide rail, the upper slide rail is slidably connected with the upper guide roller base, the top of the square steel profiling guide roller is fixedly connected with the upper guide roller base through the bearing base, the bottom of the square steel profiling guide roller is fixedly connected with the lower guide roller base through the bearing base, the lower guide roller base is connected with the screw nut mechanism, and the two profiling guide rollers are driven by the two screw nut mechanisms to move on the bracket respectively.
4. The online ultrasonic flaw detection method for the square steel according to claim 3, wherein the lead screw and nut mechanism comprises a lead screw, a lead screw sleeve and a hand wheel, the lead screw sleeve is connected with the bracket in a sliding mode, the lead screw is connected with the lead screw sleeve in a threaded mode, the hand wheel is fixedly connected to the end portion of the lead screw, and the lead screw is connected with the main frame through a bearing; the two sets of screw rod and nut mechanisms are arranged oppositely, and the screw rod is respectively provided with a left-handed thread and a right-handed thread.
5. The square steel online ultrasonic flaw detection method according to claim 1, wherein the inlet anti-bouncing vibration device and the outlet anti-bouncing vibration device have the same structure and both comprise a frame and an anti-bouncing vibration mechanism, and the anti-bouncing vibration mechanism comprises a lifting cylinder, a connecting frame, a linear bearing, a linear guide rail, a damping spring, a bearing seat and a rubber roller; the top of the frame is fixedly connected with a lifting cylinder, a piston rod extending out of the bottom of the lifting cylinder is connected with a connecting frame, the connecting frame is fixedly connected with a linear bearing, a linear guide rail is connected with the linear bearing in a sliding manner, and the linear guide rail is fixedly connected with the frame; the connecting frame is connected with the bearing seat mounting plate through a guide rod, a damping spring is sleeved outside the guide rod, the bottom of the damping spring abuts against the bearing seat mounting plate, the top of the damping spring abuts against the connecting frame, and the guide rod is connected with the connecting frame through a nut; the bearing seat mounting plate is fixedly connected with a bearing seat, and a rubber roller is mounted on the bearing seat.
6. The square steel online ultrasonic flaw detection method according to claim 1, characterized in that the square steel 1-4 combined type probe lifting devices have the same structure and comprise a probe lifting mounting plate, a four-bar mechanism, a probe lifting driving cylinder, a probe lifting cylinder, a lead screw nut transmission mechanism, a combined probe, a positioning rubber wheel and a mounting plate;
the probe lifting mounting plate is provided with a four-bar mechanism, a probe lifting driving cylinder, a piston rod of the probe lifting driving cylinder is connected with the four-bar mechanism, the probe lifting driving cylinder drives the four-bar mechanism to move, the four-bar mechanism is connected with a positioning rubber wheel and a lead screw nut transmission mechanism through the mounting plate, the lead screw nut transmission mechanism is connected with the probe lifting cylinder, the probe lifting cylinder drives a combined probe to reciprocate, the positioning rubber wheel and the combined probe are perpendicular to each other and are respectively supported on two adjacent faces of square steel.
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