CN102344242B - The process furnace of numerical control convective mixed radiation heating mode and heating means - Google Patents
The process furnace of numerical control convective mixed radiation heating mode and heating means Download PDFInfo
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- CN102344242B CN102344242B CN201110205028.5A CN201110205028A CN102344242B CN 102344242 B CN102344242 B CN 102344242B CN 201110205028 A CN201110205028 A CN 201110205028A CN 102344242 B CN102344242 B CN 102344242B
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Abstract
The present invention relates to a kind of can thermal exposure effectively needed for homogenizing flat glass tempering, sheet glass can be weakened again well and add the stress hankered, sheet glass is avoided to reveal in heat-processed, process furnace and the heating means of the numerical control convective mixed radiation heating mode of digital spc energy-saving heating sheet glass can be realized again simultaneously, it comprises process furnace, about many branch wind pipes are respectively equipped with above and below described process furnace middle plateform glass conveying ceramic roller, many heating units lay respectively on about many branch wind pipe outlet air surfaces and heating unit work is controlled by PLC.Advantage: effectively can avoid plate glass surface and the huge temperature difference in inside, avoid being revealed by the tempering sheet glass heating initial stage, the Low-E glass heats later stage can be made again to get enough radiant heat, and heating efficiency is high.
Description
Technical field
The present invention relates to a kind of relate to a kind of can thermal exposure effectively needed for homogenizing flat glass tempering, stress during sheet glass heating can be weakened again well, sheet glass is avoided to reveal in heat-processed, process furnace and the heating means of the numerical control convective mixed radiation heating mode of digital spc energy-saving heating sheet glass can be realized again simultaneously, belong to glass heating furnace and tempering glass glass manufacture field.
Background technology
The all number of patent applications 200610049746.7 of the applicant legal representative, title " energy saving strong convection sheet glass heating oven ", comprise body of heater, body of heater is made up of liftable upper furnace body and the lower furnace body cooperation of being fixed on ground, body of heater is provided with sheet glass import fire door and outlet fire door, the ceramic roller of transporting flat glass is provided with in body of heater, about the some groups heatproof windmills be arranged symmetrically with are provided with in body of heater, air outlet and the corresponding pipeline communication of each heatproof windmill, on, lower pipeline is outlet air end is symmetrically arranged in ceramic roller upper and lower towards ceramic roller, convection current is formed between upper and lower pipeline, entering of heatproof windmill, air outlet coordinates formation one gas circulation loop by upper and lower pipeline and body of heater inner chamber, the air inlet of each heatproof windmill is provided with a main heating source, and the outlet air end place of each pipeline is provided with a heating source.Process furnace of the present invention more efficiently, more energy-conservation, pollution-free, temperature equilibrium more easily controls.
CN1224406A, title " for the heat treated process furnace of sheet glass ", comprise a longitudinally elongated chamber, wherein accommodate the roller conveyer device for sheet glass, the feature of described process furnace is, it comprises the radiant heating device that the first and second devices of carrying out heating with the forced convection by air combine, in convection current, the temperature of air is by regulating its speed of circulation to control, described device is separately positioned on above and below described conveyer device, and is therefore separately positioned on above and below the sheet glass that processing.
CN101844862A, title " glass tempering furnace of net configuration heating ", the two ends of rotational support roller-way between body of heater both sides, above and below this roller-way, adopt heating unit to heat the processed glass be carried on roller-way, above described roller-way and/or between below with heating unit, the blowpipe parallel with described roller-way is housed, and make this heating unit and blowpipe be netted the intersection, in this blowpipe, be pressed into hot blast by high-temperature blower.Be characterized in that the blowpipe of heat-resisting steel is parallel with rollgang, vertically with heater strip form net battle array.Stove silk carries out radiation heating to glass, radiation heating is carried out to the high temperature steel airduct be adjacent simultaneously, blower fan blasts in heat resisting pipe by stove through the air of heating, continue when warm air flows in steel pipe to be heated, then blow to glass surface to glass heats, sheet glass, under the effect of radiation and convection current two kinds of type of heating, substantially increases rate of heating, thus makes the glass after processing have higher quality.
Weak point in above-mentioned background technology: one is that plate glass heats initial stage people for causing surface and the huge temperature difference in inside, easily reveals; Two is the Low-E glass heats later stage cannot get enough radiant heat, loss heating efficiency; Three is control without numerical control; Four is that two kinds of modes all have steel plate to intercept between glass and heating wire, without the direct radiation from nichrome wire.
Purpose of design: keep away the weak point in a background technology, design one can avoid plate glass surface and the huge temperature difference in inside effectively, sheet glass is avoided to reveal at the heating initial stage, the Low-E glass heats later stage can be made again to get enough radiant heat, the process furnace of the numerical control convective mixed radiation heating mode that heating efficiency is high and heating means.
Design: in order to realize above-mentioned purpose of design.1, adopt PLC (programmable logic controller) according to the two technical parameter of formula process furnace of convection current radiation and the technical parameter of sheet glass, controlling the realization that sheet glass technical indicator is in digitized quantification all the time, is one of technical characteristic of the present invention.The object done like this is: PLC is a kind of specially for applying in industrial settings and the electronic installation of digital operation that designs, it adopts the storer that can program, be used for storing actuating logic computing therein, sequential operation, timing, the instruction of the operation such as counting and arithmetical operation, and by digital or analog input and output, control various types of machinery or production process, therefore it can form a complete numerical-control heating stove with the two formula process furnace of convection current radiation, and the central processing unit (CPU) in PLC receives according to the function that PLC system program is given and the user program stored from programmer key entry and data, check power supply, storer, the state of I/O and warning timer, and the grammar mistakes in user program can be diagnosed, when PLC puts into operation, first it receives state and the data of on-the-spot each input unit in the mode of scanning, and respectively stored in I/O image area, then from user program memory, user program is read one by one, send in I/O image area or data register by the result of the regulation actuating logic of instruction or arithmetic operator after command interpretation, after being finished etc. all user programs, finally the data in each output state of I/O image area or output register are sent to corresponding take-off equipment, circular flow like this, until out of service.The application adopts PLC as the two formula Heating Furnace Control hinge of convection current radiation for this reason, both the collection to data had been achieved, the data of operator can be received again online, PLC calculates online by the sheet glass warming temperature gradient of tempering according to obtained data, heat-up time, the equal angle value of temperature, the technical indicator of sheet glass is made to be among digitized quantified controlling all the time, not only fundamentally weaken the stress of sheet glass inside, avoid the generation in heat-processed middle plateform glass self-explosion phenomenon, and ensure that the quality of glass after tempering.2, many heating units lay respectively at the design on about many branch wind pipe outlet air surfaces, are technical characteristics two of the present invention.The object done like this is: electric heating panel is a kind of radial pattern well heater, can form extremely strong wide range directed radiation at vertical space after energising, electric energy is effectively converted into far-infrared radiation energy by it, is directly passed to baked article, be converted into molecular thermalmotion rapidly, generate heat from inside to outside.Therefore infrared rays can not penetrating metal in theory, but infrared rays has heating effect to metal in practical application, metal is delivered to inside this heat again, can only be " through ", and can not " penetrate ", therefore in background technology, heating unit is built in blowing box, placed metal object between nichrome wire and glass and intercept heat trnasfer, heats is poor, and energy consumption is large, causes energy loss.Heating unit arranges along many group branch wind pipe outlet air surfaces by the application respectively, what formed is infrared radiation and hot air convection hybrid heating, and it not only has infrared rays strong radiant heat effect, and has auxiliary convective heating effect, sheet glass is heated more even, heat-up time is shorter.3, below branch wind pipe, the design of wind-guiding sieve plate above nichrome wire, be technical characteristic three of the present invention.The object done like this is: due to wind-guiding sieve plate, it is positioned at below branch wind pipe air outlet, the wind homogenizing that air outlet can blow out by it, it is made to form uniform wind face, because wind surface pressure is consistent, not only ensure that the planeness of surface of plate glass is unaffected, and the homogeneity of its heating have also been obtained the raising of essence, meets the steel process requirement of sheet glass.4, the design that many heater element power are adjustable is technical characteristic four of the present invention.The object done like this is: because sheet glass is by the impact of its material, manufacturing process and method of producing, the technical parameter of its shaping sheet glass is different, this just requires that process furnace can according to the input of sheet glass technical parameter, the Heating temperature of automatic adjustment process furnace, thus realize the object of digital quantization heated plate glass, the application, by adjustable for heating element designs success ratio, can realize the adjustment to its thermal value, meets the heating requirements of process furnace.5, PLC middle plateform glass heats software package is built-in, is technical characteristic five of the present invention.The object done like this is: because this software calculates by the stress parameters of heated plate glass according to the technical parameter that sheet glass heats, therefore when the stress parameters calculated when software is greater than the value of its setting, instruction process furnace changes type of heating and the Heating temperature of flat glass toughening, stress in sheet glass is weakened, reaches the object avoiding it to reveal.
Technical scheme 1: a kind of process furnace of numerical control convective mixed radiation heating mode, it comprises process furnace, be respectively equipped with about many branch wind pipes above and below described process furnace middle plateform glass conveying ceramic roller, many heating units lay respectively on about many branch wind pipe outlet air surfaces and heating unit work is controlled by
PLC.
Technical scheme 2: a kind of heating means of process furnace of numerical control convective mixed radiation heating mode, (1) when starting to heat slab white glass (more than 10mm), first the technical parameter of plate glass is input to PLC by the man-machine interface in PLC, PLC is according to sheet glass conveying ceramic roller 12 length, the technical parameter of plate glass and stress parameters, and the air outlet temperature of branch wind pipe 5, wind speed, automatically calculate plate glass and heat temperature required thermal exposure, each heatproof windmill is out of service, be in the upper of high temperature, the nichrome wire of lower heating unit sends infrared rays, radiation heating is carried out to glass, because infrared rays has good penetrance to glass, therefore glass thermally equivalent can be ensured, now heat BF's inner state and be equal to conventional radiation stove, to reduce glass fryer probability, by the time when glass heats is to 400-550 DEG C of deliquescing, the speed of plate glass in process furnace is 25-30mm/s, each heatproof windmill often runs frequently again, the warm air in stove is sucked from blast inlet, air outlet is passed through through second-heating, blast main, branch wind pipe, finally from the outlet air end of branch wind pipe after wind-guiding sieve plate homogenizing constantly from upper, below is sprayed to glass, convective heating is carried out to glass, the white glass of slab is under radiation and convection current two kinds of type of heating effects, heat-up time shortens greatly, heating unit is divided into several independently unit, independently regulates by temperature regulating device, and make glass heats more even, quality is better, (2), when starting to heat LOW-E glass and white glass (below 12mm), the nichrome wire being in the heating unit of high temperature sends infrared rays, carries out radiation heating to glass, each heatproof windmill often runs frequently simultaneously, the warm air in stove is sucked from blast inlet, by air outlet, blast main, branch wind pipe, the last outlet air end from branch wind pipe constantly sprays to glass after wind-guiding sieve plate homogenizing simultaneously, convective heating is carried out to glass, in body of heater, warm air is in recurrent state all the time, now the movement velocity of glass in process furnace is 35-45mm/s, thermal efficiency is higher, by the flow regulating the rotating speed of high-temperature electric machine in heatproof windmill to change upper and lower pipeline blowout warm air, glass top and bottom are heated evenly.
The present invention is compared with background technology, and one is can thermal exposure effectively needed for homogenizing tempering sheet glass, reliably can weaken again the stress in sheet glass, avoid sheet glass to reveal in heat-processed; Two is the technical parameters according to sheet glass, and adjust the two formula process furnace type of heating of convection current radiation and add heat, not only ensure the quantification temperature needed for flat glass toughening, accelerate heat transfer rate, and reduce energy consumption, energy-saving effect is remarkable; Three is that PLC middle plateform glass heats software package is built-in, avoids the risk that the large sheet glass of stress value is revealed in heat-processed.
Accompanying drawing explanation
Fig. 1 is the structural representation of the two formula process furnace of numerical control convection current radiation.
Embodiment
Embodiment 1: with reference to accompanying drawing 1.A kind of process furnace of numerical control convective mixed radiation heating mode, it comprises process furnace, be respectively equipped with about many branch wind pipes 5 above and below described process furnace middle plateform glass conveying ceramic roller 12, many heating units 6 lay respectively on about many branch wind pipes 5 outlet air surface and heating unit 6 work is controlled by PLC (not shown in FIG.).Described upper ceramic roller 12 is provided with temperature measuring probe 10(many temperature measuring probes) and be connected with the signal input part of PLC.Described upper and lower heating unit 6 is arranged vertically with ceramic roller 12, and many heating units 6 are divided into multiple independently heating unit and are connected with PLC.Heating unit 6 in described multiple independently heating unit, by the mutual cross-over control of multiple open-and-shut controller, reaches the object that hot face heating source is evenly distributed, Heating temperature is adjustable.Described many heating units 6 and be provided with wind-guiding sieve plate between toughened glass.The power adjustable of described many heating units 6, object meets the self-adjusting needs of process furnace Heating temperature.
As shown in Figure 1, a kind of combination type glass process furnace, comprise body of heater, body of heater is made up of liftable upper furnace body 1 and lower furnace body 2 cooperation of being fixed on ground, body of heater surrounding inwall is provided with thermal insulation layer 3, the ceramic roller 12 of transporting flat glass 11 is provided with in body of heater, about the some groups heatproof windmills 7 be arranged symmetrically with are provided with in body of heater, the air outlet 9 of each heatproof windmill 7 is communicated with corresponding blower duct, blower duct comprises some blast mains 4, the two ends of each blast main 4 are communicated with the air outlet 9 of corresponding heatproof windmill 7, each blast main 4 there are some branch wind pipes 5 by flexible suspension mechanism connection, on, lower branch wind pipe 5 is outlet air end towards ceramic roller 12 and is symmetrically distributed in the upper and lower of ceramic roller 12, entering of heatproof windmill 7, air outlet 8, 9 are coordinated respectively upper by top and bottom blowing pipeline and body of heater inner chamber, a gas circulation loop is formed in lower furnace body, be evenly equipped with heating unit in the centre of ceramic roller 12, up-draught pipeline, be evenly equipped with heating unit in the centre of ceramic roller 12, katabatic wind pipeline, heating unit is respectively divided into several independent control unit, and each independently control unit is furnished with temperature regulating device 10.
Embodiment 2: on the basis of embodiment 1, a kind of heating means of process furnace of numerical control convective mixed radiation heating mode, (1) when starting to heat slab white glass (more than 10mm), first the technical parameter of plate glass is input to PLC by the man-machine interface in PLC, PLC is according to sheet glass conveying ceramic roller 12 length, the technical parameter of plate glass and stress parameters, and the air outlet temperature of branch wind pipe 5, wind speed, automatically the thermal exposure that plate glass tempering is temperature required is calculated, each heatproof windmill is out of service, be in the upper of high temperature, the nichrome wire of lower heating unit sends infrared rays, radiation heating is carried out to glass, because infrared rays has good penetrance to glass, therefore glass thermally equivalent can be ensured, now heat BF's inner state and be equal to conventional radiation stove, to reduce glass fryer probability, by the time when glass heats is to 400-550 DEG C of deliquescing, the speed of plate glass in radiant-type furnace is 25-30s/mm(25s/mm, 26s/mm, 27s/mm, 28s/mm, 29s/mm, 30s/mm) each heatproof windmill often runs frequently again, the warm air in stove is sucked from blast inlet, air outlet is passed through through second-heating, blast main, branch wind pipe, finally from the outlet air end of branch wind pipe after wind-guiding sieve plate homogenizing constantly from upper, below is sprayed to glass, convective heating is carried out to glass, the white glass of slab is under radiation and convection current two kinds of type of heating effects, heat-up time shortens greatly, heating unit is divided into several independently unit, independently regulates by temperature regulating device, and make glass heats more even, quality is better, (2) when starting to heat LOW-E glass and white glass (below 12mm), the nichrome wire being in the heating unit of high temperature sends infrared rays, radiation heating is carried out to glass, the upper surface of LOW-E glass has plated one deck silver, when therefore radiation heating being carried out to it, and upper surface meeting reflected radiation heat, so heating is slow, and lower surface can because the reflection of upper surface be overheated, upper and lower surface is heated uneven, so by regulating upper and lower convective heating to make glass above and below be heated evenly, each heatproof windmill often runs frequently simultaneously, the warm air in stove is sucked from blast inlet, pass through air outlet, blast main, branch wind pipe, the last outlet air end from branch wind pipe constantly sprays to glass after wind-guiding sieve plate homogenizing simultaneously, convective heating is carried out to glass, in body of heater, warm air is in recurrent state all the time, now glass in process furnace with 35-45mm/s(35mm/s, 36mm/s, 37mm/s, 38mm/s, 39mm/s, 40mm/s, 41mm/s, 42mm/s, 43mm/s, 44mm/s, speed 45mm/s) moves back and forth, thermal efficiency is higher, by regulating in the rotating speed change of high-temperature electric machine in heatproof windmill, the flow of lower pipeline blowout warm air, glass top and bottom are heated evenly.The air outlet temperature of described branch wind pipe 5 is directly proportional to wind speed, is inversely proportional to heating unit 6 heating power.
Embodiment 3: on the basis of embodiment 2, described PLC is built-in with sheet glass heating software package, whether the work of this software package is controlled by the setting of stress parameters value in sheet glass, when in sheet glass, stress parameters value is greater than safety value, software package triggering work, instruction process furnace type of heating is preheating, be incubated, heat, be incubated, heat, be incubated, to be warming up to flat glass toughening temperature required again again.
It is to be understood that: although above-described embodiment to be contrasted detailed text description to mentality of designing of the present invention; but these text descriptions; just the simple text of mentality of designing of the present invention is described; instead of the restriction to mentality of designing of the present invention; any do not exceed mentality of designing of the present invention combination, increase or amendment, all fall within the scope of protection of the present invention.
Claims (3)
1. the process furnace of a numerical control convective mixed radiation heating mode, it comprises process furnace, it is characterized in that: in described process furnace, lower heating unit and ceramic roller are arranged vertically, about many branch wind pipes are respectively equipped with above and below sheet glass conveying ceramic roller, many heating units are divided into multiple independently heating unit and are connected with PLC, described PLC is built-in with sheet glass heating software package, whether the work of this software package is controlled by the setting of stress parameters value in sheet glass, before sheet glass heating, assay plate glass strain parameter value, when stress parameters is greater than safety value, software package triggering work, it is preheating that instruction process furnace changes type of heating, insulation, heat, insulation, heat again, be incubated again, be warming up to flat glass toughening temperature required, many are provided with wind-guiding sieve plate between heating unit and sheet glass, described many heating units lay respectively at about many branch wind pipe outlet air surfaces and heating unit work is controlled by PLC, PLC is as the two formula Heating Furnace Control hinge of convection current radiation, both to data gathering, receive again the data of operator online, PLC calculates online by the equal angle value of the sheet glass warming temperature gradient of tempering, heat-up time, temperature according to obtained data, makes the technical indicator of sheet glass be among digitized quantified controlling all the time, (1) when starting to heat white more than the glass 10mm of slab, first the technical parameter of plate glass is input to PLC by man-machine interface, PLC is according to sheet glass conveying ceramic roller length, the technical parameter of plate glass, stress parameters, and the air outlet temperature in branch wind pipe face, wind speed, automatically the thermal exposure that plate glass tempering is temperature required is calculated, each heatproof windmill is out of service, be in the upper of high temperature, the nichrome wire of lower heating unit sends infrared rays, radiation heating is carried out to glass, because infrared rays has good penetrance to glass, therefore glass thermally equivalent can be ensured, now heat BF's inner state and be equal to conventional radiation stove, to reduce glass fryer probability, by the time when glass heats is to 400-550 DEG C of deliquescing, the speed of plate glass with 25-30mm/s in process furnace makes bilateral reciprocation, each heatproof windmill often runs frequently, the warm air in stove is sucked from blast inlet, air outlet is passed through through second-heating, blast main, branch wind pipe, finally from the outlet air end of branch wind pipe after wind-guiding sieve plate homogenizing constantly from upper, below is sprayed to glass, convective heating is carried out to glass, the white glass of slab is under radiation and convection current two kinds of type of heating effects, heat-up time shortens greatly, heating unit is divided into several independently unit, independently regulates by temperature regulating device, and make glass heats more even, quality is better, (2), when starting to heat LOW-E glass and white below glass 12mm, the nichrome wire being in the heating unit of high temperature sends infrared rays, carries out radiation heating to glass, each heatproof windmill often runs frequently simultaneously, the warm air in stove is sucked from blast inlet, by air outlet, blast main, branch wind pipe, the last outlet air end from branch wind pipe constantly sprays to glass after wind-guiding sieve plate homogenizing simultaneously, convective heating is carried out to glass, in body of heater, warm air is in recurrent state all the time, now the speed of glass for 35-45mm/s in process furnace makes bilateral reciprocation, thermal efficiency is higher, by the flow regulating the rotating speed of high-temperature electric machine in heatproof windmill to change upper and lower pipeline blowout warm air, glass top and bottom are heated evenly, heating unit in described multiple independently heating unit is by the mutual cross-over control of multiple open-and-shut controller.
2. the process furnace of numerical control convective mixed radiation heating mode according to claim 1, is characterized in that: the power adjustable of described many heating units.
3. the process furnace of numerical control convective mixed radiation heating mode according to claim 1, it is characterized in that: described branch wind pipe temperature out is directly proportional with power, its wind speed is controlled by heatproof windmill, glass upper and lower surface is made to shroud in spray warm air, remain high temperature, reach and glass is well heated.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104975399A (en) * | 2014-10-23 | 2015-10-14 | 铜陵梧桐树农业发展有限公司 | Device used for purifying zirconia fibers |
| CN105417961B (en) * | 2015-11-30 | 2018-04-13 | 常州华美光伏材料有限公司 | A kind of infrared heating device |
| CN107382045B (en) * | 2017-08-07 | 2020-02-11 | 洛阳兰迪玻璃机器股份有限公司 | Glass plate tempering process control method |
| CN107540200A (en) * | 2017-09-07 | 2018-01-05 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate toughening cooling system |
| CN107572764A (en) * | 2017-09-07 | 2018-01-12 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate convection type heating means |
| CN110515347B (en) * | 2019-08-13 | 2021-02-23 | 深圳市大族数控科技股份有限公司 | Heat transfer measuring method and device for numerical control machine tool, storage medium and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861535A (en) * | 2006-03-08 | 2006-11-15 | 姚敏 | Energy saving strong convection sheet glass heating oven |
| CN202148251U (en) * | 2011-07-21 | 2012-02-22 | 杭州精工机械有限公司 | Heating furnace adopting numerical control convective mixing radiation heating mode |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861535A (en) * | 2006-03-08 | 2006-11-15 | 姚敏 | Energy saving strong convection sheet glass heating oven |
| CN202148251U (en) * | 2011-07-21 | 2012-02-22 | 杭州精工机械有限公司 | Heating furnace adopting numerical control convective mixing radiation heating mode |
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