CN1036726C - Device for monitoring the breakage of steel strip - Google Patents
Device for monitoring the breakage of steel strip Download PDFInfo
- Publication number
- CN1036726C CN1036726C CN94119434A CN94119434A CN1036726C CN 1036726 C CN1036726 C CN 1036726C CN 94119434 A CN94119434 A CN 94119434A CN 94119434 A CN94119434 A CN 94119434A CN 1036726 C CN1036726 C CN 1036726C
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- signal
- door
- broken belt
- strip
- dancer roll
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Abstract
The present invention relates to a detection device for strip breakage of strip steel in a continuous annealing unit or a hot galvanizing unit oven. In the present invention, signals of strip tension sensors 3m, 4 of oven chambers and a dancer roller and a signal of a position sensor 5 of the dancer roller pass through an OR gate 6 and are combined with a signal of a strip speed sensor at an AND gate 2 into an indirect strip breakage detection signal which is combined with a direct strip breakage detection signal of an iron bar detector head 7n via an AND gate 9n into one, and then a strip breakage signal is sent to a relay 11 via an OR gate 10. The present invention with stable and reliable performance can accurately detect the strip breakage in time so as to avoid misoperation caused by various reasons and reduce economic loss caused by the strip breakage.
Description
The present invention relates to a kind ofly with control in the steel heat treatment process or adjustment technology, is a kind of comprehensive detection device to power, displacement and electrical signal, particularly at the proofing unit during band steel generation broken belt in continuous annealing unit or the pot galvanize unit furnace.
In vertical continuous annealing unit or pot galvanize unit furnace, the band steel of all size is under various furnace temperature, speed, between a large amount of furnace roller rollers, keep long distance (1～2Km) continuous advancing, if heating inhomogeneous cooling, tension distribution inequality or band steel defectiveness, the not timing of plate shape are arranged slightly, be formed with stress concentration on the band steel section direction, just be very easy to cause accidents such as the bent broken belt of sideslip broken belt or hot wooden dipper.To be different from the distinguishing feature of the outer broken belt of stove and other unit broken belt be that treatment time behind the broken belt is long especially to broken belt in this stove, and time-consuming hand labour needs more than 30 hours approximately, and the nonscheduled down time that broken belt is caused accounts for more than half numbers.Secondly, in the stove in the broken belt many occasions are the sideslip broken belts that are close to, spoil furnace wall, furnace roller, electric heater, the width of cloth and penetrate that equipment happens occasionally in the stove such as pipe, need very carry out under the rugged environment and repair aforesaid device, prolong the tape handling time of resolving more.The broken belt detector mostly is the direct detection mode of mechanical type at present; promptly cover 2 parallel metal rods are set at each furnace bottom; draw 2 lines and receive alternating-current relay; in case broken belt; the band steel leaves furnace rolls by deadweight and drops cause short circuit on 2 metal bars; engage relay sends the broken belt signal, shuts down completely automatically rapidly.Though this detector has the advantage of direct detection; structure is also simple; but owing to pile up iron rust always between metal bar; each furnace roller rotating speed can not absolute synchronization and the pine band bumps metal bar; and numerous broken belt detectors lead-in wire reason such as ground short circuit easily under high temperature high dust environment; often cause flase operation; broken belt is not shut down yet, and the result causes band temperature for some time too high, and hot wooden dipper song takes place; cause driving with regard to broken belt; false become true, played retroaction, thus the operative employee of more domestic factories even it is dismantled need not; make production dangerous more, the work of treatment behind the broken belt is more complicated time-consuming.More external producers then adopt polarity formula indirect detection device; promptly several sections tension signals in the stove are monitored; when certain section tension force little during to a certain setting; sending guard signal differentiates for the operative employee; whether the operative employee is according to various indicating instruments in the stove (mainly being tension force, velometer) fluctuation situation, judge whether broken belt and will shut down.The shortcoming of this method is conspicuous; be difficult only with 1 parameter cause of tension force operative employee differentiation; stop time might be incured loss through delay; even true broken belt; because people's judgement needs the time, thereby be helpless to reduce that equipment is damaged in broken belt treatment time and the stove, if misjudgment; false most probably the change really caused artificial broken belt.
Purpose of the present invention is intended to make improvements at problems of the prior art, to obtain a kind of stable and reliable for performance, detector that can accurately and timely detect broken belt, to avoid producing flase operation, reduce to greatest extent because the financial loss that broken belt caused.
For achieving the above object, the technical solution of the present invention's proposition is with directly detection and indirect detection organically combine.
Accompanying drawing is depicted as the present invention and constitutes synoptic diagram.
As shown in the figure, the present invention includes a plurality of broken belt detection head 7n that form by 2 iron staffs on the various furnace chamber bottoms that are located in the unit, at the strip tension transmitter 3m of each furnace chamber setting, the strip tension transmitter 4 that on the dancer roll of steel ingress, unit furnace zone, is provided with and dancer roll position transducer 5, reach strip speed transmitter 1.In addition, the present invention also comprises the testing circuit to iron staff detection head 7n that is made of one group of photoelectronic coupler 12n and voltage comparator 8n, and by or door 6, time delay unit 13 and the testing circuit that constitutes with door 2 to various transmitters 1,4,5,3m.When strip speed during greater than crawl speed, 1 pair one of a strip speed transmitter and door 2 output signals, simultaneously, strip tension transmitter 3m in each furnace chamber, dancer roll strip tension transmitter 4 and dancer roll position transducer 5 are jointly to one or 6 output signal, as long as wherein there is a parameter to exceed range of normal value, or door 6 just has signal output, by or the signals of door 6 outputs flow to again after through a time delay unit 13 and door 2, at this moment an indirect broken belt detection signal output is just arranged with door 2; At first carry out voltage ratio by the direct detected signal of iron staff detection head 7n through entering their comparer 8n separately behind the photoelectronic coupler 12n again; each detection head 7n adopts independent power supply; to get rid of error signal owing to iron rust short circuit output; when comparative voltage that detection head 7n signal voltage is set in greatly less than comparer 8n; comparer 8n just has a direct broken belt detection signal output; when this signal and indirect broken belt detection signal input to door 9n simultaneously; will export with door 9n that a broken belt signal is given or door 10; as long as when with door 9n in have one broken belt signal output is arranged, or door 10 will be exported broken belt signal engage relay 11 and reports to the police and shut down.
When strip speed was in than the low maintenance of usual dispatch with crawl speed, velocity sensor 1 did not have signal output, promptly blocks and door 2 outputs, has just blocked the output with door 9n, so detector quits work yet.
Because a large amount of iron sheets drop and cover at furnace bottom, iron rust is easy to 2 iron staff short circuits, and output again can avoid producing flase operation after comparing by the voltage that will set among detection signal voltage and the comparer 8n.Resistance drop when the voltage of setting among the comparer 8n is equivalent to each furnace chamber iron rust short circuit, the iron rust resistance Yin Wendu of each furnace chamber is different and inequality, and comparer 8n is made of a potentiometer and an amplifier.
1 dancer roll that the unit furnace ingress is provided with is as stablizing into furnace zone steel tension force.Dancer roll is stabilized in 1/2 position when moving at ordinary times, if band steel tension, the compressing dancer roll moves down, the bridle rolls that consequent position deviation amount control is positioned at before the dancer roll quickens, the band steel just has lax trend, the tension force that detects descends, and moves on the dancer roll and returns to 1/2 position, promptly keeps constant into stove district strip tension by the stove speed of going into of adjusting the band steel.Therefore, input dancer roll tension force and position signal also can be monitored the band steel operation conditions into the stove place.
In addition, disturb, by entering comparer 8n again behind the direct detected signal process photoelectrical coupler 12n of iron staff detection head 7n for avoiding external electromagnetic field; For preventing owing to instantaneous pine band causes flase operation, by or the signals of door 6 outputs flow to again and door 2 after through a time delay unit 13; Because the furnace bottom lid is the high-temperature high dust zone, outlet line is easy to ground connection in this zone, past is adopted the utility alternating current source to a plurality of detection head 7n, in case 2 ground connection are arranged, just may produce with 2 effects that the iron staff short circuit is the same, produce flase operation, for avoiding it, each detection head 7n adopts independent power supply.
The present invention not only organically combines original direct detection and indirect detection, also with dancer roll strip tension signal and dancer roll position signal, and the strip speed signal is used as the original signal that broken belt detects, enlarge the acquisition range of resolving band signal, also adopted the comparer that prevents iron rust simultaneously, prevent the time delay unit of instantaneous pine band, prevent the photoelectrical coupler of electromagnetic interference, and the iron staff detection head is adopted the means of independent power supply, avoided because the flase operation that a variety of causes caused, stable and reliable for performance, can accurately and timely detect and be judged, reduced to greatest extent because the financial loss that broken belt caused.
Claims (1)
1. be with steel broken belt detector for one kind, comprise a plurality of broken belt detection heads formed by 2 iron staffs on the various furnace chamber bottoms that are located in the unit, strip tension transmitter in each furnace chamber setting, strip tension transmitter that on the dancer roll of steel ingress, unit furnace zone, is provided with and dancer roll position transducer and strip speed transmitter, it is characterized in that: this detector also comprises the testing circuit to iron staff detection head (7n) that is made of one group of photoelectronic coupler (12n) and voltage comparator (8n), and by or the door (6), time delay unit (13) and with door (2) constitute to various transmitters (1,4,5, testing circuit 3m), when strip speed during greater than crawl speed, strip speed transmitter (1) is to one and door (2) output signal, simultaneously, strip tension transmitter (3m) in each furnace chamber, dancer roll strip tension transmitter (4) and dancer roll position transducer (5) are jointly to one or (6) output signal, as long as wherein there is a parameter to exceed range of normal value, or door (6) just has signal output, by or the signal of door (6) output flow to again after through a time delay unit (13) and door (2), at this moment an indirect broken belt detection signal output is just arranged with door (2); At first pass through by the direct detected signal of iron staff detection head (7n) and to enter their comparers (8n) separately again behind the photoelectronic coupler (12n) and carry out voltage ratio; each detection head (7n) adopts independent power supply; when detection head (7n) signal voltage during greatly less than the comparative voltage set in the comparer (8n); comparer (8n) just has a direct broken belt detection signal output; when this signal and indirect broken belt detection signal input to door (9n) simultaneously; will export with door (9n) that a broken belt signal is given or door (10); as long as when with door (9n) in have one broken belt signal output is arranged, or door (10) will be exported broken belt signal engage relay (11) and reports to the police and shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119434A CN1036726C (en) | 1994-12-23 | 1994-12-23 | Device for monitoring the breakage of steel strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94119434A CN1036726C (en) | 1994-12-23 | 1994-12-23 | Device for monitoring the breakage of steel strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108308A CN1108308A (en) | 1995-09-13 |
| CN1036726C true CN1036726C (en) | 1997-12-17 |
Family
ID=5039234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94119434A Expired - Fee Related CN1036726C (en) | 1994-12-23 | 1994-12-23 | Device for monitoring the breakage of steel strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1036726C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4602120B2 (en) * | 2005-03-02 | 2010-12-22 | Ｙｋｋ株式会社 | Fastener tape feeder for continuous fastener stringer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363471A (en) * | 1979-10-31 | 1982-12-14 | Kawasaki Steel Corporation | Steel strip continuous annealing apparatus |
-
1994
- 1994-12-23 CN CN94119434A patent/CN1036726C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4363471A (en) * | 1979-10-31 | 1982-12-14 | Kawasaki Steel Corporation | Steel strip continuous annealing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1108308A (en) | 1995-09-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD |
|
| CP03 | Change of name, title or address |
Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Address before: 201900 No. 1, Middle Road, Baoshan District, Shanghai Patentee before: Baosteel Group Corporation |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |