CN101664794B - Continuous casting two cold closed chamber casting blank surface temperature field measuring device - Google Patents
Continuous casting two cold closed chamber casting blank surface temperature field measuring device Download PDFInfo
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- CN101664794B CN101664794B CN2009101908766A CN200910190876A CN101664794B CN 101664794 B CN101664794 B CN 101664794B CN 2009101908766 A CN2009101908766 A CN 2009101908766A CN 200910190876 A CN200910190876 A CN 200910190876A CN 101664794 B CN101664794 B CN 101664794B
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Abstract
The invention relates a continuous casting two cold closed chamber casting blank surface temperature field measuring device. The front end of a heat insulating protective sleeve is provided with heat resisting quartz glass, and a cleaning mechanism is arranged in front of one side of the quartz glass. An infrared array CCD camera is arranged in the heat insulating protective sleeve, and a cooling sleeve is sheathed outside the heat insulating protective sleeve. An inlet gas splitter and an outlet air separator are arranged on the cooling sleeve; and the front end of the outlet air separator is provided with a guide mechanism which leads the air to horizontally blow the casting blank surface in a line shape. The device can overcome the influence of dispersed water mist medium when an optical path is measured, and lead the infrared array CCD camera to work within a controlled temperature range by a temperature sensor; the camera has strong heat resisting capabilty, and the arranged cleaning mechanism can guarantee the cleaness of the quartz class, thus being capable of realizing the measurement of the casting blank surface temperature field with long term, stability, continuity and accuracy, in the two cold closed chambers.
Description
Technical field
The present invention relates to a kind of temperature measuring equipment, specifically refer in continuous casting two cold closed chamber, realize casting blank surface temperature field measurement mechanism accurately for a long time.This temperature measuring equipment is mainly used in heating steel billet temperature measurement on-line, operation of rolling rolled piece surface temperature field on-line measurement equicontinuity production system in the field on-line measurement of continuous casting secondary cooling process casting blank surface temperature, the heating furnace; Online for a long time under the complex environments such as dust, aqueous vapor, iron scale and high-intensity magnetic field interference to being implemented in, continuously, temperature field measurement accurately, it is significant to improve controlling of production process level and product quality.
Background technology
The measurement of continuous casting billet skin temperature field and control; Have great importance to improving cc billet surface quality; Be embodied in following several aspect: 1, monitor the strand straightening temperature in real time and whether avoid brittle temperature range, prevent that strand from brittle deformation occurring in the aligning section; The rise speed of 2, on-line monitoring surface temperature reduces the strand underbead crack; 3, on-line monitoring strand cooling velocity reduces surface crack defect; 4, on-line monitoring band liquid core casting blank surface temperature instantaneous value prevents that bulge from producing; 5, the homogeneity of on-line monitoring continuous casting billet lateral surfaces temperature for each nozzle control loop of continuous casting secondary cooling water provides the feedback temperature field signal, realizes the control of continuous casting secondary cooling water dynamic feedback.
In the continuous casting two cold closed chamber; Continuous casting billet is the object of high temperature motion; And be in the environment of high water smoke, high-heating radiation and high-intensity magnetic field; Casting billet surface is covered with the iron scale and the moisture film of irregularity simultaneously, and it is not a constant that the iron scale of casting billet surface irregularity and moisture film cause the emissivity of measured surface each point, and irregular nonlinearities change takes place.The existence of the high water smoke dispersive medium in detector and the casting billet surface light path makes the casting billet surface radiated electromagnetic wave receive dispersions such as reflection, refraction, absorption, causes bigger thermometric error.Strong magnetic field circumstance causes detector output signal generation serious disturbance, also influences measuring accuracy.These factors cause adopting conventional contacting temperature measurement method (as adopting measuring methods such as thermopair, thermal resistance) and non-contact thermometry (like conventional infrared thermometer, thermal imaging system etc.), all can't realize the on-line measurement of the continuous casting billet skin temperature (comprising single-point temperature and temperature field) of two cold closed chamber.And current high-quality, the production of robotization continuous casting billet require more accurately, real-time (online) temperature data, to reflect current slab quality and to do corresponding adjustment operation, realize the dynamic control of two cold-zone water distributions.At present, the thermometry of moving target is mostly adopted the contactless temperature-measuring based on photoelectric effect and heat radiation relative theory, mainly comprise western light IRT-1200D type, HCW-III type, HCW-V type like the single-point temperature measuring set; The YHCW-9400 type; WHD4015 type (two aimings, target D40mm can reach 15m), WFHX330 type (optical laying, target D50mm can reach 30m); The PM-20 of produced in usa, 30,40,50, HAS-201 temperature measurer; The TPT20 of Sweden AGA Aktiebolag, infrared thermometers such as 30,40,50.Thermal infrared imager mainly comprises Japanese TVS-2000, TVS-100; U.S. PM-250; Sweden AGA-THV510,550,570 etc.; But these contactless temperature-measuring appearance and thermal infrared imager can't long-time running in this thermometric environment and are guaranteed the precision measured, can't directly apply to the on-line measurement of continuous casting billet skin temperature field in the two cold closed chamber.
For avoiding the influence to radiated electromagnetic wave such as water fog medium and casting billet surface moisture film; Common way is to adopt method that high velocity air purges light path weakening the dispersion of water fog medium to radiated electromagnetic wave, and considers the requirement of light path, and air-flow is vertically to spray to casting billet surface; Sweep gas generally adopts room temperature pressurized air or industrial nitrogen; By pyrometry casting billet surface generation convective heat exchange, make the temperature of strand test point produce reduction by a relatively large margin, increase thermometric error greatly.For the influence of dispersive medium to thermometric; Have according to reflection, refraction and the absorption probability incident of light path at dispersive medium; (Monte Carlo Method MCM) finds the solution the also temperature field of reconstruct detected space to equation of radiative transfer, and this reconstructing method is owing to be difficult to accurately obtain the particle concentration field of optical path space dispersive medium to adopt Monte Carlo method; And it is long to calculate convergence time, thereby the temperature accuracy that obtains is low and can't realize real-time measurement.In order to reduce the influence of dispersive medium to temperature measurement accuracy, also there is employing to measure than color model, this method adopts the electromagnetic wave of two kinds of wavelength to carry out colorimetric measurement; Dispersive mediums such as the water smoke in the light path all have absorption to two kinds of electromagnetic waves, and are though absorptivity is different, less relatively to the influence of monochromatic radioactive intensity ratio; With the monocolor method ratio, colourimetry can improve measuring accuracy, but receives the influence of dispersive medium; And be difficult to demarcate than the coefficient in the color model, also can't guarantee the precision of measuring.The employing three-color process that has carries out temperature survey; This method need not known the emissivity of tested solid surface; The accuracy that the absorption of the electromagnetic wave energy of infrared wavelength is improved thermometric through the absorption peak of avoiding selective gas is because the stability of this instrument is subject to the spectrum stability of optical filter, detector and the limitation that wavelength (wavelength period) is selected, complex structure simultaneously; Cost an arm and a leg, in industry, also be not widely used at present.
At present the on-the-spot casting blank surface temperature of continuous casting is measured to lay particular emphasis on basically and adopt hand-held infrared thermometer off-line measurement casting blank surface temperature; The thermal infrared imager of employing off-line measurement casting blank surface temperature field is also arranged; Belong to off-line portable type measuring mode, and this method can't realize the on-line measurement in interior casting blank surface temperature of continuous casting two cold closed chamber and temperature field.Under the rugged surroundings to high temperature, high water smoke, high-intensity magnetic field in the two cold closed chamber; How to guarantee the work that measuring instrument is online, continuous for a long time; And to stablizing under the situation that temperature measurement error do not produce too much influence, the research work that obtains the casting blank surface temperature field does not relate to basically.At present; In the continuous casting production scene; Also there is not a cover can steady in a long-term, accurately measure the on-line measurement system of casting blank surface temperature field in the two cold closed chamber; And guarantee the secondary cooling water dynamic control technology that the high-quality strand is produced, need badly and solve the reliable and stable on-line measurement of continuous casting billet skin temperature field energy in the two cold closed chamber.
In sum, on-line measurement two cold closed chamber casting blank surface temperature field is a difficult problem on engineering.Should solve high concentration water smoke medium between testee and the thermometric detector to the influence of radiation temperature measurement; Prevent again badly to make the contaminated thermometric error that causes of temperature probe because of the thermometric environment; Simultaneously; Under the strong magnetic field circumstance condition, guaranteeing the reliable transmission of signal, realize that the continuous casting two cold closed chamber casting blank surface temperature field is stable for a long time, accurate, continuous coverage, is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
Above-mentioned deficiency and technical problem demanding prompt solution to prior art exists the purpose of this invention is to provide a kind of casting blank surface temperature field temperature measuring equipment, to realize long-term, the accurately on-line measurement of continuous casting two cold closed chamber casting blank surface temperature field.
The objective of the invention is to realize like this: continuous casting two cold closed chamber casting blank surface temperature field measuring device; It comprises infrared linear array CCD camera, cooling collar and thermal insulation protection sleeve pipe; Be provided with resistant to elevated temperatures quartz glass at thermal insulation protection sleeve pipe front end, infrared linear array CCD camera is located in the thermal insulation protection sleeve pipe.Cooling collar is placed in outside the thermal insulation protection sleeve pipe, forms gas channel between cooling collar and the thermal insulation protection sleeve pipe.Be respectively equipped with inlet gas shunt and exit flow separation vessel in cooling collar rear end and front end; The inlet gas shunt is provided with cooling gas inlet, refrigerating gas outlet and signal wire outlet; The outlet of cooling gas inlet and signal wire is same mouthful, the refrigerating gas outlet corresponding gas channel.The exit flow separation vessel is provided with refrigerating gas outlet, is provided with at exit flow separation vessel front end to make air-flow be wire laterally to purge the guiding mechanism to casting billet surface.
Said infrared linear array CCD camera comprises ccd detector, and ccd detector is that response spectrum is silicon two utmost point infrared eye linear array arrays of 0.95-1.1 μ m; Perhaps said infrared linear array CCD camera comprises ccd detector and optical filter, and optical filter arrowband centre wavelength is 1.0 μ m.
Further; Be provided with wiper mechanism in quartz glass side the place ahead; Wiper mechanism comprises aqueduct and is positioned at the aqueduct tail end and facing to the water jet of quartz glass; On aqueduct, be provided with solenoid valve, be provided with in the thermal insulation protection sleeve pipe through detecting the light intensity signal that sees through quartz glass and judge the light intensity sensor of quartz glass pollution level, light intensity sensor is connected with solenoid valve.Dirty when to a certain degree influencing infrared linear array CCD camera and obtain picture effect when quartz glass, just quartz glass is cleaned.
In the thermal insulation protection sleeve pipe, be provided with temperature sensor, temperature sensor is connected with the refrigerating gas operation valve with adjusting refrigerating gas flow, thereby infrared linear array CCD camera is worked in the temperature range of control.Said temperature sensor is a thermistor.
In order to reach better effect of heat insulation, said thermal insulation protection sleeve pipe by with one heart, etc. high three layers constitute, infrared linear array CCD camera, temperature sensor and light intensity sensor are positioned at innermost layer thermal insulation protection sleeve pipe.
Compare prior art, great advantage of the present invention is and can realizes the long-term, stable, continuously, measure accurately of casting blank surface temperature field at two cold closed chamber, be embodied in following some:
1. adopt linear array infrared CCD detector; The response wave spectrum is chosen in the very strong 0.95-1.1 μ m near-infrared wavelength section of water fog medium; Adopt transmission type optical system; Lens adopt the material that can see through corresponding wave band radiation, and the wave band of measurement more than 700 ℃ can effectively overcome detector and tested casting billet surface and measure the influence that light path water dispersed mist medium brings mainly in the near-infrared region of 1.0 mu m ranges; Adopt the linear array infrared CCD simultaneously, can realize that the casting blank surface temperature field heat picture of different sequential on a certain lateral attitude of continuous casting two cold closed chamber and temperature value distribute, and express directly perceived, vivid.
2. linear array infrared CCD detector adopts four layers of protection structure, and cooling cover and outermost layer thermal insulation protection sleeve pipe adopt pressurized air or industrial nitrogen to carry out air cooling, and outermost layer and middle layer, middle layer and innermost layer thermal insulation protection sleeve pipe are the clearance; Be provided with thermistor simultaneously; Inner operating ambient temperature is monitored in real time; Detection signal adopts ICP/IP protocol to transmit through the 1000M Ethernet, guarantees that the high temperature resistant environment ability of detector is strong, satisfies continuous casting two cold closed chamber hot environment Testing requirement fully.Simultaneously, the detector image-forming camera lens is in the environment of a high-seal, to form the space of a high-cleanness, high.
3. be provided with and make air-flow be wire laterally to purge guiding mechanism to casting billet surface; Guiding mechanism is decided according to strand cross measure scope; Can reduce the temperature measurement error that water fog medium and casting billet surface moisture film take to measuring pressurized air of optical path space formation or industrial nitrogen dispersive medium; Simultaneously, be provided with dirty window and detect automatically and wiper mechanism, to guarantee the cleanliness factor of quartz glass.
4. adopt the 1000M Ethernet interface, realize the Long-distance Control of CCD aperture time, prevent the excessive saturated and phenomenon that occurs that electric charge " overflows " and the image that causes " turns white " of electric charge in the potential well that causes of ccd detector heat radiation through the aperture time interface module.
Description of drawings
Fig. 1-structural representation of the present invention.
Embodiment
Referring to Fig. 1; On scheming, can find out; Continuous casting two cold closed chamber casting blank surface temperature field measuring device of the present invention mainly comprises wiper mechanism 1, quartz glass 2, infrared linear array CCD camera 3, inlet gas shunt 5, cooling collar 6, thermal insulation protection sleeve pipe 7, refrigerating gas outlet 8, exit flow separation vessel 9, guiding mechanism 10.
Infrared linear array CCD camera 3 is located in the thermal insulation protection sleeve pipe 7; Quartz glass 2 is located at thermal insulation protection sleeve pipe 7 front ends; The effect of quartz glass is to prevent that pollution medium from getting in the thermal insulation protection sleeve pipe and ccd video camera is brought infringement, because the strand temperature is very high, so quartz glass should be high temperature resistant.Cooling collar 6 is placed in outside the thermal insulation protection sleeve pipe 7, forms gas channel 4 between cooling collar 6 and the thermal insulation protection sleeve pipe 7.Be respectively equipped with inlet gas shunt 5 and exit flow separation vessel 9 in cooling collar 6 rear ends and front end; Inlet gas shunt 5 is provided with cooling gas inlet 11, refrigerating gas outlet 12 and signal wire outlet 13; Cooling gas inlet 11 be same mouthful with signal wire outlet 13, refrigerating gas outlet 12 correspondences gas channel 4.Exit flow separation vessel 9 is provided with refrigerating gas outlet 8, is provided with at exit flow separation vessel 9 front ends to make air-flow be wire laterally to purge the guiding mechanism 10 to casting billet surface.
Infrared linear array CCD camera 3 comprises infrared CCD detector, imaging optical path device; Infrared CCD explorer response spectrum is silicon two utmost point infrared detector arrays of 0.95-1.1 μ m; Lens and arrowband centre wavelength that optical focusing system adopts germanium material to process are the optical filter of 1.0 μ m; Ccd detector has the 1000M Ethernet interface, possesses the aperture time controllable function simultaneously, can be according to imaging effect through long-range setting CCD aperture time.
Further; Be provided with wiper mechanism 1 in quartz glass 2 side the place aheads; Wiper mechanism comprises aqueduct and is positioned at the aqueduct tail end and facing to the water jet of quartz glass; On aqueduct, be provided with solenoid valve, be provided with in the thermal insulation protection sleeve pipe through detecting the light intensity signal that sees through quartz glass and judge the light intensity sensor of quartz glass pollution level, light intensity sensor is connected with solenoid valve.Dirty when to a certain degree influencing infrared linear array CCD camera and obtain picture effect when quartz glass, just quartz glass is cleaned.Specifically, when light intensity sensor detects light intensity signal, judge the dirty degree of window (quartz glass), send control signal, the unlatching of control electromagnetic valve and closing, the opening time is set by the solenoid valve inner parameter as required, and high quartz glass 2 is cleaned.
In the thermal insulation protection sleeve pipe, be provided with temperature sensor, temperature sensor is connected with the refrigerating gas operation valve with adjusting refrigerating gas flow, thereby infrared linear array CCD camera is worked in the temperature range of control.Said temperature sensor is a thermistor.
In order to reach better effect of heat insulation, said thermal insulation protection sleeve pipe by with one heart, etc. high three layers constitute, infrared linear array CCD camera, temperature sensor and light intensity sensor are positioned at innermost layer thermal insulation protection sleeve pipe.
When beginning to measure; (pressure is 0.3-0.5MPa, and air mass flow is 300～500L/h) after auxiliary equipment (oil-water separator, exsiccator and filtrator) is handled, through the heat-resistant fireproof metal hose with pressurized air or industrial nitrogen; Get into inlet gas shunt 5 through cooling gas inlet 11; In inlet gas shunt 5, gas is carried out sending into gas channel 4 by refrigerating gas outlet 12 after the constant voltage, infrared linear array CCD camera 3 place environment are carried out gas cooled, refrigerating gas gets into exit flow separation vessel 9 after through gas channel 4 again; After in exit flow separation vessel 9, carrying out constant voltage; Send into guiding mechanism 10, form diffused wire jet gas stream, imaging optical path and casting billet surface moisture film are purged.
High temperature casting billet surface radiated electromagnetic wave through blowing medium and part water fog medium, passes quartz glass; Through the imaging and focusing camera lens; Reach the line array CCD detector, the wave spectrum of ccd detector response 0.95-1.1 μ m, and according to the imaging parameters of setting; Form strand temperature heat picture, see off through the 1000M Ethernet interface.Situation according to the temperature heat picture; Through the aperture time of Ethernet interface control ccd detector, to obtain satisfied heat picture, through obtaining heat picture; Carry out graphical analysis and calculating; And adopt the maximization Processing Algorithm, and eliminate of the interference of casting billet surface iron scale to thermometric, the temperature gradient that obtains the horizontal different sequential of strand distributes.Simultaneously; The inner temperature-sensitive sensing unit of ccd detector (temperature sensor) detects the internal work temperature; And see and control the working temperature signal variable valve of cold gas light path off through Ethernet interface, the flow of refrigerating gas is carried out FEEDBACK CONTROL, to guarantee suitable intensity of cooling.Through the light intensity sensor in the thermal insulation protection sleeve pipe of innermost layer optical transmission window (quartz glass) is detected; Judge the pollution level of quartz glass according to the light intensity signal that detects; And the solenoid valve of control water jet pipeline; Opening time is confirmed by the solenoid valve inner parameter, silica glass window is cleaned.
Claims (7)
1. continuous casting two cold closed chamber casting blank surface temperature field measuring device; It is characterized in that: it comprises infrared linear array CCD camera (3), cooling collar (6) and thermal insulation protection sleeve pipe (7); Be provided with resistant to elevated temperatures quartz glass (2) at thermal insulation protection sleeve pipe (7) front end, infrared linear array CCD camera (3) is located in the thermal insulation protection sleeve pipe (7); Cooling collar (6) is placed in outside the thermal insulation protection sleeve pipe (7), forms gas channel (4) between cooling collar (6) and the thermal insulation protection sleeve pipe (7); Be respectively equipped with inlet gas shunt (5) and exit flow separation vessel (9) in cooling collar (6) rear end and front end; Inlet gas shunt (5) is provided with cooling gas inlet (11), refrigerating gas outlet (12) and signal wire outlet (13); Refrigerating gas outlet (12) corresponding gas channel (4), the exit flow separation vessel is provided with the refrigerating gas outlet; Be provided with at exit flow separation vessel (9) front end and make air-flow be wire laterally to purge guiding mechanism (10) to casting billet surface; Refrigerating gas gets into exit flow separation vessel (9) after through gas channel (4) again, in exit flow separation vessel (9), carry out constant voltage after, send into guiding mechanism (10), form diffused wire jet gas stream, imaging optical path and casting billet surface moisture film are purged.
2. continuous casting two cold closed chamber casting blank surface temperature field measuring device according to claim 1; It is characterized in that: said infrared linear array CCD camera comprises ccd detector, and said ccd detector is that response spectrum is silicon two utmost point infrared eye linear array arrays of 0.95-1.1 μ m.
3. continuous casting two cold closed chamber casting blank surface temperature field measuring device according to claim 1 is characterized in that: said infrared linear array CCD camera comprises ccd detector and optical filter, and optical filter arrowband centre wavelength is 1.0 μ m.
4. according to claim 1 or 2 or 3 described continuous casting two cold closed chamber casting blank surface temperature field measuring devices; It is characterized in that: be provided with wiper mechanism (1) in quartz glass (2) side the place ahead; Wiper mechanism comprises aqueduct and is positioned at the aqueduct tail end and facing to the water jet of quartz glass; On aqueduct, be provided with solenoid valve; Be provided with in the thermal insulation protection sleeve pipe through detecting the light intensity signal that sees through quartz glass and judge the light intensity sensor of quartz glass pollution level, light intensity sensor is connected with solenoid valve.
5. continuous casting two cold closed chamber casting blank surface temperature field measuring device according to claim 4; It is characterized in that: in the thermal insulation protection sleeve pipe, be provided with temperature sensor; Temperature sensor is connected with the refrigerating gas operation valve to regulate the refrigerating gas flow, and said temperature sensor is a thermistor.
6. continuous casting two cold closed chamber casting blank surface temperature field measuring device according to claim 5; It is characterized in that: said thermal insulation protection sleeve pipe (7) by with one heart, etc. high three layers constitute, infrared linear array CCD camera, temperature sensor and light intensity sensor are positioned at innermost layer thermal insulation protection sleeve pipe.
7. continuous casting two cold closed chamber casting blank surface temperature field measuring device according to claim 6 is characterized in that: cooling gas inlet (11) on the inlet gas shunt (5) and signal wire outlet (13) are same mouthful.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101908766A CN101664794B (en) | 2009-09-16 | 2009-09-16 | Continuous casting two cold closed chamber casting blank surface temperature field measuring device |
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| CN2009101908766A CN101664794B (en) | 2009-09-16 | 2009-09-16 | Continuous casting two cold closed chamber casting blank surface temperature field measuring device |
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| CN101664794A CN101664794A (en) | 2010-03-10 |
| CN101664794B true CN101664794B (en) | 2012-04-04 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102632213A (en) * | 2011-02-12 | 2012-08-15 | 沈阳鑫君城电子有限公司 | Method for measuring and controlling surface temperature of casting blank and special device thereof |
| CN102366763B (en) * | 2011-10-31 | 2013-08-14 | 攀钢集团西昌钢钒有限公司 | Method for controlling rolling temperature of strip materials |
| CN103768810B (en) * | 2014-02-26 | 2015-11-11 | 哈尔滨工业大学 | Donkey-hide gelatin glue with mounting box flusher gives up foam extractor top box sidewall paneling |
| CN105635542A (en) * | 2016-02-24 | 2016-06-01 | 山东钢铁股份有限公司 | Camera protection system and method |
| CN111399319B (en) * | 2020-03-23 | 2021-12-17 | 冀中能源峰峰集团有限公司 | Real-time dust removal and cooling device and method for camera lens in high-dust environment |
| CN117055280B (en) * | 2023-10-12 | 2023-12-19 | 贵州航天控制技术有限公司 | Camera cooling circulation device |
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