CN1092171A - High temperature continuous casting billet eddy-current detector for surface defect - Google Patents
High temperature continuous casting billet eddy-current detector for surface defect Download PDFInfo
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- CN1092171A CN1092171A CN 93114586 CN93114586A CN1092171A CN 1092171 A CN1092171 A CN 1092171A CN 93114586 CN93114586 CN 93114586 CN 93114586 A CN93114586 A CN 93114586A CN 1092171 A CN1092171 A CN 1092171A
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Abstract
The present invention is a kind of high temperature continuous casting billet eddy-current detector for surface defect, belong to continuous casting billet surface inspection technical field, it is by high-temperature probe, eddy current flaw detec, mechanical scanner and testing result pen recorder are formed, be installed on the mechanical scanner high-temperature probe with the perpendicular direction of strand working direction on do the continuous transverse to-and-fro movement, its eddy current probe scans casting billet surface, eddy current probe is passed to signal in the eddy current flaw detec, transfers the surface state that demonstrates strand in the testing result pen recorder again.
Description
The present invention is a kind of high temperature continuous casting billet surface imperfection whirlpool pick-up unit, belongs to continuous casting billet surface inspection technical field.
Hot Charging of Continuous Casting Slab send-directly rolls (CC-DR) to combine the modern metallurgical technology technology that steel-making, continuous casting and steel rolling aspect recent technological advances are got up.It has energy-conservation in a large number, improve lumber recovery and shorten remarkable results such as production cycle.Be to guarantee the time equalization of steel-making, continuous casting and the steel rolling whole piece technological process of production, improve the tandem rolling quality, must onlinely find the defective that is difficult to avoid on the hot strand timely, thereby avoid skimble-skamble continuation processing.Not only can realize above-mentioned purpose by nondestructive examination, the information of nondestructive examination simultaneously can also in time feed back to conticaster suitably to be adjusted casting technological parameter, improves slab quality.Therefore, the continuous casting billet hot online nondestructive examination in surface is important step in continuous casting, the rolling production technology, and its meaning is extremely important.Continuous casting steel billet is after crystallizer outlet moulding, through two cold-zone cooled and solidified, during this period owing to many-sided reasons such as smelting, casting speed, cooling velocities, be difficult to can produce all types of defectives with avoiding, wherein occur the highest, harm is bigger is surface crack defect.The continuous casting steel billet that CC-DR uses designs its rolling again depressing than being smaller, so behind two cold-zones, it is the most suitable to implement Non-Destructive Testing before the shearer.At present, mainly contain countries such as Germany, Japan, Sweden and English, method in the world and carry out this work, wherein adopt EDDY CURRENT better to continuous casting billet surface defects detection effect, its outstanding characteristics are need not any couplant, can realize contactless work, and detection sensitivity is higher.But flaw detection relatively has many where the shoe pinches under high temperature eddy current flaw detection and the normal temperature, must be able to bear long-time high temperature heat radiation more than 1100 ℃ as eddy current probe, can suppress the casting billet surface vibration noise that spot produced, improve detection signal-to-noise ratio, and the location of defective, quantitative test judgement etc.
For this reason, the present invention has designed a kind of high temperature continuous casting billet eddy-current detector for surface defect.High-temperature probe in this device has the good high-temperature protection and detects performance, can resist the high temperature more than 1100 ℃, mechanical scanner in this device and testing result pen recorder can be realized the surface imperfection under the online moving condition of hot strand is positioned and detection by quantitative, and defective is accurately located and timely record.
High temperature continuous casting billet eddy-current detector for surface defect of the present invention is made up of high-temperature probe, eddy current flaw detec, mechanical scanner and testing result pen recorder.
The object of the present invention is achieved like this:
On high temperature continuous casting billet working direction, the eddy current probe and the casting billet surface spacing that are installed in the high-temperature probe on the mechanical scanner are 3～5mm, and perpendicular to the casting billet surface top, mechanical scanner drive high-temperature probe with the perpendicular direction of continuous casting billet working direction on do the continuous transverse to-and-fro movement, casting billet surface is formed " serrate " track while scan that is spaced apart 5～10mm, realization detects 100% of measured surface, eddy current probe in the high-temperature probe is connected with eddy current flaw detec, and eddy current flaw detec is connected by computer interface circuit and the testing result pen recorder of being made up of computing machine and printer; The computer interface circuit becomes digital signal to be input in the computing machine analog-signal transitions of eddy current flaw detec output, the sweep signal of eddy current probe under the computer recording, and on screen, demonstrate the surface state of strand, and come out, thereby can determine the size and location of the injury of casting billet surface easily by printer prints.
Be described in detail below in conjunction with accompanying drawing:
Fig. 1 is the high-temperature probe inner structure cut-open view in apparatus of the present invention.
Fig. 2 is the eddy current probe synoptic diagram that is installed in the high-temperature probe.
Fig. 3 be eddy current probe circuit and with the diagram that is connected of eddy current flaw detec.
Fig. 4 is the mechanical scanner structural diagrams.
Fig. 5 is the vertical view of Fig. 4.
Fig. 6 is the side view of Fig. 4.
The oscillogram of output when Fig. 7 is two position switch work of A, B.
Fig. 8 is the computer interface circuit.Dotted line is an interface circuit among the figure.
Fig. 9 is A, B in the computer interface circuit, C 3 time, voltage oscillogram.
Figure 10 is the oscillogram of the LF358 in the computer interface circuit.
Figure 11 is the software block diagram of computer recording.
Figure 12 is the detection synoptic diagram of apparatus of the present invention.
1, high-temperature probe
High-temperature probe will be detected a flaw at the high temperature more than 1100 ℃, the eddy current probe that is contained in the high-temperature probe will only work long hours under several millimeters the distance on distance continuous casting billet surface, therefore, probe must can bear long high-temperature baking, otherwise probe will be burnt by strong thermal radiation, so must carry out high temperature protection and cooling to eddy current probe. For this reason, provide a kind of the geomantic omen type of cooling that combines and high-temperature probe that adopts particulate metal formation full-closed structure of adopting in apparatus of the present invention, it can guarantee that eddy current probe its internal temperature when hot detection remains below 40 ℃, thereby guaranteed the electric property of eddy current probe and good mechanical strength, satisfied the detection of dynamic needs.
High-temperature probe in apparatus of the present invention, as shown in Figure 1, mainly by fuse 1, water jacket 2, sleeve 3, main ajutage 5, an ajutage 6 and socket cover 4 form. Fuse 1 is positioned at the center of high-temperature probe, and eddy current probe 8 is installed in the bottom centre of fuse 1, and 120 ° of the inwall garden Zhou Shangcheng of fuse 1 are uniform-distribution with three ajutages 6, and an ajutage 6 and the inwall of fuse 1 weld together and extend to the bottom of fuse 1. The interior garden that three ajutages 6 consist of just in time Embed eddy current probe 8, the bottom of fuse 1 seals with high-resistance alloy confining bed 7, such as the NiCrMnSi alloy material, high-resistance alloy confining bed 7 is with eddy current probe 8 and the isolation of tested casting billet surface, to prevent that strong thermal radiation from damaging eddy current probe 8, high-resistance alloy is very little to electromagnetic signal decay, and the thickness of confining bed only be about 0.3mm, therefore to the testing result impact not quite. Three ajutages 6 are pooled to main ajutage 5 at the first half of fuse 1, link to each other with air pump by leather hose. Be evenly distributed with 6 air vents 10 in garden, the top week of fuse 1, compressed air is pumped into main ajutage 5 by air pump by leather hose, enter again three ajutages 6, blow rapidly then the bottom of hitting eddy current probe 8, and the heat of being penetrated by the tested casting billet surface width of cloth is discharged by air vent 10 rapidly. Water jacket 2 is used for the outer wall of fuse 1 is carried out the recirculated water protection; fuse 1 insert water jacket 2 inner chamber and with its inwall tight fit; a water inlet 12 and a discharge outlet 13 are respectively arranged at the top of water jacket 2; cold water enters water jacket 2 by water inlet 12 and is flowed out by discharge outlet 13; the cold water that flows in the water jacket 2 makes fuse 1 and external high temperature environment fully isolated; to the air-cooled redeeming of fuse 1 inside, the cold water in the water jacket 2 just becomes the protective layer of fuse 1 like this, prevents that high temperature is from penetrating to fuse 1 width of cloth all around. The shell of high-temperature probe is a sleeve 3, and water jacket 2 and fuse 1 all are loaded in the sleeve 3, and the outer garden wall of water jacket 2 matches with the Nei Yuanbi of sleeve 3. Be evenly equipped with 8 louvres 11 on wall top, the garden of sleeve 3 and be used for also having 4 above louvres 14 on the socket cover 4 of sealing sleeve 3, the hot blast of discharging from the air vent 10 of fuse 1 can in time discharge by louvre 11 and 14. The wall thickness of sleeve 3 should be not less than 5mm, is beneficial to its internal part is consisted of protection. Cable 9 couples together eddy current probe 8 and eddy current flaw detec.
In general, the factor that affects continuous casting billet quality is mainly derived from its surperficial crackle, yet owing to be subjected to technogenic influence, the normal occurrence law oscillation mark of casting billet surface although this class defective itself does not have big impairment to quality of materials, is given the surface Eddy current inspection makes troubles. Because the noise that oscillation mark causes is often greater than Signal of Cracks, adopt conventional eddy current probe not only can not overcome oscillation mark to the impact of flaw detection, and the relative motion of probe and crackle, orientation also impact detect effect. For this reason, the present invention has adopted such as Fig. 2, eddy current probe shown in Figure 3. This eddy current probe is made up of magnetic core 15, skeleton 16, coil windings 17 and joint 18. Skeleton 16 usefulness bakelites or nylon are made, coil windings 17 enamel-covered wire coiling, and magnetic core adopts ferrite, and ferritic high magnetic permeability zone is at 100K～1MHZ. Transformer coupled mode is adopted in the instrument excitation that is connected with eddy current probe 8 in Fig. 3, and is connected by the bridge circuit mode with eddy current probe 8, can effectively suppress Lift-off effect like this, also is of value to the raising detection speed simultaneously. The measuring-signal of eddy current probe inputs to the differential motion amplifying unit 19 of eddy current flaw detec with direct coupling system, does the signal of phase sensitive detection, filtering and phase rotating (or signal rotation) again and processes. In addition, eddy current flaw detec also should be with the vector Presentation Function of impedance plane.
When using eddy current probe, feed should possess enough energy for the driving source of probe, with the intensity that increases and projection distance, raising detection sensitivity, so should adopt the current source system of closed loop.
Adopt above-mentioned eddy current probe to have following advantage:
1. can utilize the dark oscillation mark of difference rejection ratio crackle of signal phase, depth of chatter mark can be 0～2mm.
2. the orientation of crackle is unrestricted in the flaw detection, all can well detect.
2, eddy current flaw detec
Eddy current flaw detec in apparatus of the present invention is common model, as the FORSTER DEFECTOMAT F2.825 type of West Germany, or DSP-100.Eddy current flaw detec is connected with eddy current probe 8 in the high-temperature probe, signal is input in the computing machine again.
3, mechanical scanner
Mechanical scanner in apparatus of the present invention is used for that high-temperature probe is installed and makes its direct of travel perpendicular to strand do the high speed transversal scanning.
Mechanical scanner such as Fig. 4, Fig. 5 and shown in Figure 6.It slides thick stick 24, traction wheel 25, drawing pull bar 26 by linear bearing 21, linear axis bearing 27, probe socket 22, and support 30 pipelines are led chain 29, ventilation duct 23, intake-discharge pipe 28 and detection window 38 and formed.
Two pillars that support 30 is a whole set of mechanical scanners of mechanical scanner, two sliding thick sticks 24 and traction wheel 25 all are fixed on the support 30, and two supports 30 are positioned at the both sides on top on the insulation tunnel 47, and are firmly fixing with the insulation tunnel.The both sides of support 30 respectively have root channel- section steel 41 and 42 to be close to its outside respectively.Two channel- section steels 41 and 42 are fixed on the insulation tunnel 47, and this just makes this scanister very firm, thereby have guaranteed to detect the accurate of data.Channel-section steel 41 is used for laying pipeline and leads chain 29, and 2 of A, B install two electromagnetic induction switch 35 and 34 on the channel-section steel 42.Two sliding thick sticks 24 are fixed on the support 30, and its carrying probe socket 22 is done high-speed motion stably vertically, is the movement locus of high-temperature probe 51.Two linear axis bearings 27 are installed on the sliding thick stick 24, linear bearing 21 is installed in the linear axis bearing 27, be equipped with two electromagnetism sense sheets 36 and 37 at two ends near the bearing seat of channel-section steel 42 1 sides, its effect is when probe socket 22 high-speed motions, for two electromagnetic induction switch 34 of A, B and 35 that are fixed on the channel-section steel 42 provide sensitive electromagnetic induction signal, scanister is moved back and forth, to finish real time record to testing result.Probe socket 22 is fixed on two linear axis bearings 27, individual liner ring 40 is arranged on the probe socket 22, there are three on the liner ring 40 along the uniform screw hole of garden Zhou Fangxiang, the sleeve 3 of high-temperature probe 51 is placed in the liner ring 40 and with screw and by the screw hole on the liner ring 40 sleeve 3 tightly is fixed on the liner ring 40, high-temperature probe 51 is stretched out by detection window 38, traction wheel 25 is a belt pulley, be fixed on the support 30, drawing pull bar 26 on the traction wheel links to each other with traction nose 43 on the probe socket 22, direct current generator drives traction wheel 25 runnings by belt gear, drags probe socket 22 by drawing pull bar 26 by the traction nose 43 on the probe socket again and moves along sliding thick stick.Pipeline is led chain 29 can do 180 bendings, and the one end is fixed on the end of channel-section steel 41, and the other end is fixed on the probe socket 22, leads chain and is placed in the channel-section steel, and leading chain 29 so just can be with the probe socket easy motion in channel-section steel 41.The effect of leading chain 29 is that the various pipelines (comprising airduct, intake-discharge pipe, eddy current probe feeder line etc.) in the high-temperature probe 51 are neatly drawn.Be convenient to the high-velocity scanning of popping one's head in, twine mutually when having avoided causing owing to pipeline is various motion and electric signal disturbs, influence detects.Lead two inlet pipe, drain pipe 28 that stretch out in the chain 29 by pipeline and connect water inlet 12 and freeing port 13 in high-temperature probe 51 inner water sleeves 2 respectively, water inlet pipe taps into the mouth of a river 12, the drainpipe mouth of a river 13 of running in.Lead by pipeline in the ventilation duct 23 that stretches out in the chain 29 and the high-temperature probe main ajutage with communicate, carry out air-cooled to eddy current probe 8 in the pipe 5 in the compressed air delivery in the air compressor is sent to the master of high-temperature probe 51.
Above-mentioned mechanical scanner is controlled by a DC continuous speed regulation system, and direct current generator drives traction wheel 25 uniform rotation, and this rotating speed can be adjusted continuously, and traction wheel 25 is being with probe socket 22 along sliding thick stick 24 to-and-fro movements by drawing pull bar 26 and traction nose 43.Be fixed on the also to-and-fro movement thereupon of high-temperature probe 51 on the probe socket 22, high-temperature probe 51 puts in the detection window of insulation tunnel 47, the insulation tunnel is to be iron plate by shell, and the keeping warmth space that the housing 31 of aluminosilicate refractory fiber surrounds is adhered in the inside around dolly and rail.The casting billet surface of vertically advancing along tunnel in the tunnel is carried out shuttle-scanning, when the gait of march of strand is very slow and the sweep velocity of popping one's head in when very fast then can realize whole casting billet surface is scanned detection.
4, testing result pen recorder
This device is made of a computing machine and a printer.
Different with the method for detection of tubing, bar, in high temperature when flaw detection, need be to the continuous casting billet record of fixing a point in real time, can when detecting end, promptly note the position of injury on slab like this, can cause classification to the size of injury simultaneously, for follow-up finishing process lays the foundation.
Direct of travel with strand is an X-axis, and the to-and-fro movement of probe is decided to be Y-axis; 2 of A, B be eddy current probe 8 in the Y direction horizontal throw, 2 of A, B are on the channel-section steel 42 two electromagnetic induction switch 35 installing and 34 position.Position the record to defective is finished by a 2BM DC/AT computing machine.Eddy current probe moves on to the A point from the B point, and computing machine shows delegation on screen, from the A point to the B point, the computing machine line feed, locate respectively install a position switch A, B at 2, electromagnetic induction switch 35 and 34 as shown in Figure 5, this switch can adopt JWKL-12 electromagnetic type sensed position switch.The oscillogram of output when Fig. 7 is two switch work.
Obviously, waveform shown in Figure 7 can't directly be used for control computer and finish needed work, the simulating signal of eddy current flaw detec output simultaneously also must convert the receptible digital signal of computing machine to, is connected with computing machine by the computer interface circuit then.
74LS74 in the computer interface circuit of Fig. 8 is a d type flip flop, with the B signal as time clock, with a-signal as passing zero-signal (A, B are electromagnetic induction switch 35 and 34 places), the waveform that A, B in the circuit, C are 3 as shown in Figure 9, A, B are the input signal of electromagnetic induction switch 35,34 in the 74LS74 of interface road, and C is the output signal of this element.When eddy current probe 8 moves on to the A point from the B point, waveform C is a high level, trigger computing machine and on screen, write down delegation, when eddy current probe 8 when A point moves on to the B point, C is a low level, computer screen enters a new line, like this, eddy current probe lives reciprocating cutter once, writes down delegation on the screen.
Two LF356 operational amplifiers are as comparer I and II among Fig. 8, and the analog signal conversion of eddy current flaw detec output is become digital signal, its waveform as shown in figure 10, Z is that eddy current flaw detec is in the input in interface circuit shown in Fig. 8.The threshold values that can establish two comparer I and II is respectively E
1And E
2(E
1＜E
2), if two injuries is in different size, the simulating signal of their output is also with different so.Because the output of comparer is directly inputted to the PA of 8255 parallel port
0, PA
1, like this for defective A
1, the number that the PA mouth is read is 01H, and corresponding defective B
1, the number that the PA mouth is read is 03H, the number that computing machine is then read according to the PA mouth is also judged the size of injury, thus the display mode (as nothing hinder whitening point, shallow wound show red point, dark hinder show blue point) of decision on screen.
Figure 11 is the software block diagram that computer recording is printed.
Be described below in conjunction with the testing process of instantiation apparatus of the present invention:
Figure 12 is the detection synoptic diagram of apparatus of the present invention.
One, the preparatory stage
Tested strand 33 lies in and carries on the part dolly 32, dolly leaves in the electric furnace 50, when casting blank surface temperature reaches 1100 ℃, connect eddy current flaw detec 53, computing machine 54 and printer 55 and D.C. regulated power supply (power supply magnetic induction beginning and computer interface circuit dc power) etc. detect, pen recorder.Adjust eddy current flaw detec, use FORSTER2.825 type, also available other eddy current flaw detec in the example.Electric furnace outage afterwards is with oven door opening, and dolly 32 is left along track rapidly and entered insulation tunnel 47, starts mechanical scanner simultaneously, makes high-temperature probe 51 moving toward double action at a high speed along sliding thick stick 24 in detection window, prepares to detect.
Two, detection-phase
After dolly 32 entered insulation tunnel 47, levelling dolly gait of march made it enter detection zone with very low speed.High-temperature probe 51 puts in detection window 38, does the high speed transversal scanning perpendicular to the direct of travel of dolly.When strand 33 has just entered detection zone in a flash, because there is the green effect in limit in EDDY CURRENT, eddy current probe 8 will receive very strong eddy current signal, and eddy current flaw detec 53 detects this signal computing machine opening entry in the detection trigger outcome record device after treatment.Eddy current probe 8 every to-and-fro movements are once write down delegation's round spot on the computer screen, single pass is finished in representative.To the A point, computing machine 54 screen real time record delegation do not have and write down white round spot when hindering eddy current probe 8 by the B point; Arranged, when the degree of depth of hindering is that 1mm～3mm then writes down red round spot, when the degree of depth of hindering writes down blue look round spot during greater than 3mm when wound.Eddy current probe 8 is swept when getting back to the B point by the A point, and screen is record not, change another behavior next time sweep record prepare.Like this, eddy current probe to the every shuttle-scanning of casting billet surface once, computer screen then writes down delegation.8 pairs of casting billet surface shuttle-scannings of eddy current probe have been supposed 20 times, then on the screen 20 line items will be arranged, because the gait of march of strand is that average rate is advanced, can be with strand longitudinal length 20 five equilibriums, machine data is handled as calculated again, just can accurately learn the corresponding relation of the each point that writes down on the coordinate of casting billet surface each point and the screen, thereby can determine the shape and the position of casting billet surface scar according to image, realized real-time detection and record, and had the function of distinguishing the depth of hindering cc billet surface quality.
Three, end and record are printed
After strand is all by detection window, can be observed blackout from the eddy current instrument, detect this moment and finish, stop record, start printer 55, the image printing on the computer screen is come out, in order to analyzing, keeping.
Claims (3)
1, a kind of high temperature continuous casting billet eddy-current detector for surface defect, it is characterized in that this device is by high-temperature probe, eddy current flaw detec, mechanical scanner and testing result pen recorder are formed, high-temperature probe is installed in the mechanical scanner and perpendicular to the casting billet surface top, eddy current probe in the high-temperature probe and casting billet surface spacing are 3～5mm, mechanical scanner drive high-temperature probe with the perpendicular direction of strand working direction on do the continuous transverse to-and-fro movement, casting billet surface is formed " serrate " track while scan that is spaced apart 5～10mm, eddy current probe in the high-temperature probe is connected with eddy current flaw detec, eddy current flaw detec is connected with the testing result pen recorder of being made up of computing machine and printer by the computer interface circuit, the computer interface circuit becomes digital signal to be input in the computing machine analog-signal transitions of eddy current flaw detec output, the sweep signal of eddy current probe under the computer recording, and on screen, demonstrate the surface state of strand.
2, device as claimed in claim 1, it is characterized in that said high-temperature probe is by fuse (1), water jacket (2), sleeve (3), main ajutage (5), propping up ajutage (6) and socket cover (4) forms, fuse (1) is positioned at the center of high-temperature probe, eddy current probe (8) is installed in the bottom centre of fuse (1), the inwall garden Zhou Shangcheng of fuse (1) is uniform-distribution with 3 ajutages (6) for 120 °, the inwall that props up ajutage (6) and fuse (1) welds together and extends to the bottom of fuse (1), the interior garden that 3 ajutages (6) are constituted just in time embeds eddy current probe (8), the bottom of fuse (1) seals with high-resistance alloy confining bed (7), 3 ajutages (6) are pooled to main ajutage (5) at the first half of fuse (1), link to each other with air pump by leather hose, on garden, the top week of fuse (1), be evenly distributed with 6 air vents (10); Fuse (1) insert water jacket (2) inner chamber and with its inwall wringing fit, a water inlet (12) and a freeing port (13) are respectively arranged at the top of water jacket (2); The shell of high-temperature probe is sleeve (3), water jacket (2) and fuse (1) all are loaded in the sleeve (3), the outer garden wall of water jacket (2) matches with the Nei Yuanbi of sleeve (3), wall top, garden at sleeve (3) is evenly equipped with 8 louvres (11), being used for the wall top, garden of sealing sleeve (3) is evenly equipped with 8 louvres (11), be used for having 4 louvres (14) on the socket cover (4) of sealing sleeve (3), eddy current probe (8) is connected with eddy current flaw detec by cable (9).
3, to show 1.2 described devices as right, it is characterized in that said mechanical scanner is by linear bearing (21), linear axis bearing (27), probe socket (22), sliding thick stick (24), traction wheel (25), drawing pull bar (26), support (30), pipeline is led chain (29), ventilation duct (23), intake-discharge pipe (28) and detection window (38) are formed, two supports (30) are the pillars of mechanical scanner, article two, slide bar (24) and traction wheel (25) all are fixed on the support (30), two supports (30) are fixed on the both sides that insulation tunnel (47) is gone up the top, the both sides of support (30) respectively have a channel-section steel (41) and (42) to be close to its outside respectively, channel-section steel (41) and (42) are fixed on the insulation tunnel (47), channel-section steel (41) is used for laying pipeline and leads chain (29), A gone up by channel-section steel (42) and 2 of B install two electromagnetic induction switch (35) and (34), two linear axis bearings (27) are installed on the sliding thick stick (24), linear bearing (21) is installed in the linear axis bearing (27), be equipped with two electromagnetic induction sheets (36) and (37) at two ends near the bearing seat of channel-section steel (42) one sides, probe socket (22) is fixed on two linear axis bearings (27), individual liner ring (40) is arranged on the probe socket (22), three uniform screw holes along garden Zhou Fangxiang are arranged on the liner ring (40), the sleeve of high-temperature probe (3) is placed in the liner ring (40) and with screw and is fastened on the liner ring (40) by the screw hole on the liner ring (40), high-temperature probe is stretched out by detection window (38), drawing pull bar (26) on the traction wheel (25) links to each other with traction nose (43) on the probe socket (22), direct current generator drives traction wheel (25) running by belt gear, pipeline is led chain (29) can do 180 ° of bendings, the one end is fixed on the end of channel-section steel (41), the other end is fixed on the probe socket (22), lead two intake-discharge pipes (28) that chain (29) stretches out by pipeline and connect water inlet (12) and freeing port (13) in the water jacket (2) of high-temperature probe respectively, lead the ventilation duct (23) that stretches out in the chain (29) by pipeline and communicate wherein the input of the pressurized air in the air compressor with main ajutage (5) in the high-temperature probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93114586 CN1032505C (en) | 1993-11-22 | 1993-11-22 | Eddy-current detector for surface defect of high-temp. continuous-cast billet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93114586 CN1032505C (en) | 1993-11-22 | 1993-11-22 | Eddy-current detector for surface defect of high-temp. continuous-cast billet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1092171A true CN1092171A (en) | 1994-09-14 |
| CN1032505C CN1032505C (en) | 1996-08-07 |
Family
ID=4990546
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93114586 Expired - Fee Related CN1032505C (en) | 1993-11-22 | 1993-11-22 | Eddy-current detector for surface defect of high-temp. continuous-cast billet |
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|---|---|
| CN (1) | CN1032505C (en) |
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| WO2001002847A1 (en) * | 1999-06-29 | 2001-01-11 | Baoshan Iron & Steel Co., Ltd | A method and device for detecting cracks on the surface and near surface of a slab leaving continuous casting |
| CN102297893A (en) * | 2011-06-30 | 2011-12-28 | 武汉中飞扬测控工程有限公司 | On-line surface detection apparatus and method for continuous casting billet |
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1993
- 1993-11-22 CN CN 93114586 patent/CN1032505C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001002847A1 (en) * | 1999-06-29 | 2001-01-11 | Baoshan Iron & Steel Co., Ltd | A method and device for detecting cracks on the surface and near surface of a slab leaving continuous casting |
| CN102297893A (en) * | 2011-06-30 | 2011-12-28 | 武汉中飞扬测控工程有限公司 | On-line surface detection apparatus and method for continuous casting billet |
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