CN202148251U - Heating furnace adopting numerical control convective mixing radiation heating mode - Google Patents
Heating furnace adopting numerical control convective mixing radiation heating mode Download PDFInfo
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- CN202148251U CN202148251U CN201120259245U CN201120259245U CN202148251U CN 202148251 U CN202148251 U CN 202148251U CN 201120259245 U CN201120259245 U CN 201120259245U CN 201120259245 U CN201120259245 U CN 201120259245U CN 202148251 U CN202148251 U CN 202148251U
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- heating
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- process furnace
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/0417—Controlling or regulating for flat or bent glass sheets
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Abstract
The utility model relates to a heating furnace adopting a numerical control convective mixing radiation heating mode, which can effectively homogenize the heat radiation quantity needed by the tempering of plate glass, also can weaken the stress in the heating of the plate glass, avoids the spontaneous explosion of the plate glass in the heating process, and simultaneously realizes the programmable control on a digital energy-saving heating plate glass. The heating furnace comprises a heating boiler, and in the heating furnace, a plurality of upper and lower branch air pipes are respectively arranged on and below the ceramic plate glass conveying roller, and a plurality of heating elements are respectively positioned on the air outlet surfaces of the plurality of upper and lower branch air pipes, and are controlled by a PLC (Programmable Logical Controller). The heating furnace has the advantages that the large temperature difference between the surface and the inner part of the thick glass surface can be avoided effectively, the spontaneous explosion in the initial stage of tempering the plate glass can be avoided effectively, the enough radiation heat can be obtained at the rear heating stage of the Low-E glass, and the heating efficiency is high.
Description
Technical field
The utility model relates to a kind of required thermal exposure of a kind of tempering of homogenizing flat glass effectively that relates to; Stress during the sheet glass that can weaken well again heating; Avoid sheet glass in heat-processed, to reveal; Can realize simultaneously the process furnace and the heating means of the numerical control convection current mixed radiation type of heating of the energy-conservation heated plate glass of digital spcization again, belong to glass heats stove and tempering glass glass and make the field.
Background technology
All number of patent applications 200610049746.7 of the applicant legal representative, title " energy-conservation strong convection sheet glass heating oven "; Comprise body of heater; Body of heater is cooperated with the lower furnace body that is fixed in ground by liftable upper furnace body and forms; Body of heater is provided with sheet glass import fire door and outlet fire door, is provided with the ceramic roller of transporting flat glass in the body of heater, is provided with the some groups of heatproof windmills of symmetric arrangement up and down in the body of heater; The air outlet of each heatproof windmill is communicated with corresponding pipeline; Upper and lower pipeline is outlet air end and is symmetrically arranged in the upper and lower of ceramic roller towards ceramic roller, forms convection current up and down between the pipeline, and cooperating through pipeline and body of heater inner chamber up and down into and out of the air port of heatproof windmill forms a gas circulation loop; The blast inlet place 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.The process furnace of the utility model more efficiently, more energy-conservation, pollution-free, temperature equilibrium controls more easily.
CN1224406A, title " are used for the heat treated process furnace of sheet glass "; Comprise a vertical elongated chamber; Wherein holding the roller conveyer device that is used for sheet glass; The characteristics of said process furnace are that it comprises the radiant heating device that combines with first and second devices that heat through the forced convection of air, control through regulating its speed of circulation in the temperature of convection current air; Said device is separately positioned on the above and below of said conveyer device, and therefore is separately positioned on the above and below of the sheet glass of handling.
CN101844862A, title " net configuration heated glass annealing furnace "; The two ends of rotational support roller-way between the body of heater both sides adopt heating unit that the processed glass that is carried on the roller-way is heated in the above and below of this roller-way, above the described roller-way and/or below with heating unit between the blowpipe parallel with described roller-way is housed; And make this heating unit and blowpipe be netted to intersect, in this blowpipe, be pressed into hot blast through high-temperature blower.The blowpipe that is characterized in heat-resisting steel is parallel with rollgang, vertical netting battle array with heater strip.The stove silk carries out radiation heating to glass; Simultaneously the high temperature steel airduct that is adjacent is carried out radiation heating, blower fan blasts the air through heating in the stove in the heat resisting pipe, and warm air continues to be heated when in steel pipe, flowing; Then blow to glass surface to glass heats; Sheet glass has improved rate of heating greatly under the effect of radiation and two kinds of type of heating of convection current, thereby makes the glass after the processing have higher quality.
The utility model content
Weak point in the above-mentioned background technology: the one, plate glass heating initial stage people is prone to self-destruction for causing the surface and the inner huge temperature difference; The 2nd, the Low-E glass heats later stage can't be got enough radiogenic heat, the loss heating efficiency; The 3rd, no numerical control control; Four is that two kinds of modes all have steel plate to intercept between glass and heating wire, does not have the direct radiation from nichrome wire.
Purpose of design: keep away the weak point in the background technology; Design and a kind ofly can avoid the plate glass surface and the inner huge temperature difference effectively; Avoid sheet glass to reveal at the heating initial stage; Can make the Low-E glass heats later stage get enough radiogenic heat again, the process furnace of the numerical control convection current mixed radiation type of heating that heating efficiency is high.
Plan: in order to realize above-mentioned purpose of design.1, adopt PLC unit (programmable logic controller) according to the technical parameter of the two formula process furnace of convection current radiation and the technical parameter of sheet glass; Control sheet glass technical indicator is in digitized quantized realization all the time, is one of technical characterictic of the utility model.The purpose of doing like this is: PLC is a kind of specially under industrial environment, using the electronic installation of the digital operation operation that designs; It adopts the storer that can program; Being used within it, portion stores the instruction that actuating logic computing, sequential operation, timing, counting and arithmetical operation etc. are operated; And can be through digital or analog import and export; Control various types of machineries or production process, so it can form a complete numerical control process furnace with the two formula process furnace of convection current radiation, and function receives and storage is keyed in from programmer user program and data that the central processing unit among the PLC (CPU) is given according to the PLC system program; The state of inspection power supply, storer, I/O and warning timer, and can diagnose the syntex error in the user program, when PLC puts into operation; At first it receives the state and the data of on-the-spot each input unit with the mode of scanning; And deposit the I/O image area respectively in, from user program memory, read user program then one by one, through sending in I/O image area or the data register by the regulation actuating logic of instruction or the result of arithmetic operator after the command interpretation; Wait after all user programs are finished; At last each output state of I/O image area or the data in the output register are sent to corresponding take-off equipment, so circular flow is up to out of service.The application adopts the PLC unit as the two formula Heating Furnace Control hinges of convection current radiation for this reason; Both realized collection to data; Again can be online reception operator's data; The PLC unit goes out online by all degree value of the sheet glass Heating temperature gradient of tempering, heat-up time, temperature according to resulting data computation, the technical indicator of sheet glass is among the digitized quantified controlling all the time, and the inner stress of sheet glass has not only fundamentally weakened; Avoid generation, and guaranteed the quality of glass behind the tempering in heat-processed middle plateform glass self-explosion phenomenon.2, many heating units lay respectively at many designs on the branch wind pipe outlet air surface up and down, be the utility model technical characterictic two.The purpose of doing 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 the energising, it effectively is converted into the far-infrared radiation ability with electric energy, is directly passed to baked article; Be converted into molecular thermalmotion rapidly, from inside to outside heating.Therefore infrared rays can not penetrating metal in theory, but infrared rays has heating effect to metal in practical application, and metal is delivered to inside to this heat again; Can only be " seeing through ", and can not " penetrate ", so in the background technology heating unit is built in the blowing box; Having placed metal object between nichrome wire and the glass intercepts heat passage; Heats is poor, and energy consumption is big, has caused energy loss.The application arranges heating unit respectively along many group branch wind pipe outlet air surfaces; What form is infrared radiation and hot air convection hybrid heating, and it not only has infrared rays severe radiation heating function, and has auxiliary convective heating effect; It is more even that sheet glass is heated, and heat-up time is shorter.3, below the branch wind pipe, the design of wind-guiding sieve plate above the nichrome wire, be the utility model technical characterictic three.The purpose of doing like this is: since the wind-guiding sieve plate it be positioned at the branch wind pipe air outlet below; The wind homogenizing that it can blow out air outlet; Make it form uniform wind face,, guaranteed that not only the planeness of surface of plate glass is unaffected because the wind surface pressure is consistent; And the homogeneity of its heating also obtained the raising of essence, satisfied the steel process requirement of sheet glass.4, many designs that heater element power is adjustable, be the utility model technical characterictic four.The purpose of doing like this is: because sheet glass receives the influence of its material, ME and method of producing; The technical parameter of the sheet glass of its moulding has nothing in common with each other, and this just requires process furnace to adjust the Heating temperature of process furnace automatically according to the input of sheet glass technical parameter; Thereby realize the purpose of digital quantization heated plate glass; The application is designed to adjustable power with heating unit, can realize the adjusting to its thermal value, satisfies the heating requirements of process furnace.5, PLC unit middle plateform glass heats software package is built-in, be the utility model technical characterictic five.The purpose of doing like this is: because this software calculates the stress parameters that is heated sheet glass according to the technical parameter that sheet glass heats; Therefore when stress parameters that software calculated during greater than the value of its setting; The instruction process furnace changes the type of heating and the Heating temperature of sheet glass tempering; Make the stress reduction in the sheet glass, reach the purpose of avoiding its self-destruction.
Technical scheme: a kind of process furnace of numerical control convection current mixed radiation type of heating; It comprises process furnace; Said process furnace middle plateform glass carries the above and below of ceramic roller to be respectively equipped with many branch wind pipes up and down, many heating units lay respectively at many up and down on the branch wind pipe outlet air surface and heating unit work be controlled by the PLC unit.
The utility model is compared with background technology, and the one, the required thermal exposure of homogenizing tempering sheet glass effectively, the stress in the sheet glass that can weaken reliably again avoids sheet glass in heat-processed, to reveal; The 2nd, according to the technical parameter of sheet glass, adjust the two formula process furnace type of heating of convection current radiation and add heat, not only guaranteed the quantification temperature that the sheet glass tempering is required, to accelerate heat transfer rate, and reduced energy consumption, energy-saving effect is remarkable; The 3rd, PLC unit middle plateform glass heats software package is built-in, the risk of having avoided the big sheet glass of stress value in heat-processed, to reveal.
Description of drawings
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 convection current mixed radiation type of heating; It comprises process furnace; Said process furnace middle plateform glass carries the above and below of ceramic roller 12 to be respectively equipped with many branch wind pipes 5 up and down, many heating units 6 lay respectively at many up and down on branch wind pipe 5 outlet air surfaces and heating unit 6 work be controlled by PLC unit (not drawing among the figure).Said upward ceramic roller 12 is provided with temperature detection probe 10 (a plurality of temperature detection probes) and is connected with the signal input part of PLC unit.Said upper and lower heating unit 6 and ceramic roller 12 vertical layouts, many heating units 6 are divided into a plurality of independently heating units and are connected with the PLC unit.Heating unit 6 in said a plurality of independently heating unit intersects control each other through a plurality of open-and-shut controllers, reaches the purpose that the hot face heating source is evenly distributed, Heating temperature is adjustable.Said many heating units 6 and be provided with the wind-guiding sieve plate between the toughened glass.The adjustable power of said many heating units 6, purpose satisfy 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 cooperated with the lower furnace body that is fixed in ground 2 by liftable upper furnace body 1 and forms, and inwall is provided with thermal insulation layer 3 around the body of heater; Be provided with the ceramic roller 12 of transporting flat glass 11 in the body of heater; Be provided with the some groups of heatproof windmills 7 of symmetric arrangement up and down in the body of heater, the air outlet 9 of each heatproof windmill 7 is communicated with corresponding blowing pipeline, and the blowing pipeline 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; Through the flexible suspension mechanism connection some branch wind pipes 5 are arranged on each blast main 4, upper and lower branch wind pipe 5 is outlet air end towards ceramic roller 12 and be symmetrically distributed in the upper and lower of ceramic roller 12,8,9 the cooperating through top and bottom blowing pipeline and body of heater inner chamber and in upper and lower body of heater, to form a gas circulation loop respectively into and out of the air port of heatproof windmill 7; Centre at ceramic roller 12, up-draught pipeline is evenly equipped with heating unit, is evenly equipped with heating unit in the centre of ceramic roller 12, katabatic wind pipeline, and heating unit respectively is divided into several independent control unit, each independently control unit be furnished with temperature regulating device 10.The heating means of the process furnace of its numerical control convection current mixed radiation type of heating; ⑴ when beginning to heat the white glass of slab (more than the 10mm), and at first the technical parameter with plate glass is input to the PLC unit through the man-machine interface in the PLC unit, and the PLC unit is carried air outlet temperature, the wind speed of 5 of technical parameter and stress parameters and the branch wind pipes of ceramic roller 12 length, plate glass according to sheet glass; Automatically calculate the temperature required thermal exposure of plate glass tempering; Each heatproof windmill is out of service, and the nichrome wire that is in the upper and lower heating unit of pyritous sends infrared rays, and glass is carried out radiation heating; Because infrared rays has good penetrance to glass; Therefore can guarantee the glass thermally equivalent, this moment, the process furnace internal state was equal to traditional radiant-type furnace, to reduce glass fryer probability; When glass heats is to 400-550 ℃ of deliquescing by the time; 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) the normal operation frequently of each heatproof windmill again, sucks the warm air in the stove from blast inlet, passes through air outlet, blast main, branch wind pipe through second-heating; Outlet air end from branch wind pipe constantly sprays to glass from upper and lower after wind-guiding sieve plate homogenizing at last; Glass is carried out convective heating, and the white glass of slab is under radiation and two kinds of type of heating effects of convection current, and shorten heat-up time greatly; Heating unit is divided into several independently unit, can pass through the temperature regulating device independent regulation, makes glass heats more even, and quality is better; ⑵ when beginning to heat LOW-E glass and white glass (below the 12mm), and the nichrome wire that is in the pyritous heating unit sends infrared rays, and glass is carried out radiation heating; The upper surface of LOW-E glass has plated one deck silver, when therefore it being carried out radiation heating, and upper surface meeting reflected radiation heat; So heating is slow; And lower surface can be because the reflection of upper surface be overheated, and it is inhomogeneous that upper and lower surfaces is heated, so through regulating upper and lower convective heating the glass above and below is heated evenly; The normal operation frequently of each heatproof windmill simultaneously; Suck the warm air in the stove from blast inlet; Through air outlet, blast main, branch wind pipe; The last simultaneously outlet air end from branch wind pipe constantly sprays to glass after wind-guiding sieve plate homogenizing, and glass is carried out convective heating, and warm air is in recurrent state all the time in the body of heater; This moment, glass moved back and forth with the speed of 35-45mm/s (35mm/s, 36mm/s, 37mm/s, 38mm/s, 39mm/s, 40mm/s, 41mm/s, 42mm/s, 43mm/s, 44mm/s, 45mm/s) in process furnace; Thermal efficiency is higher, can change the flow that upper and lower pipeline blows out warm air through the rotating speed of regulating high-temperature electric machine in the heatproof windmill, makes to be heated evenly below on glass.The air outlet temperature that said branch wind pipe is 5 is directly proportional with wind speed, is inversely proportional to heating unit 6 heating powers.
Embodiment 3: on the basis of embodiment 2; Said PLC unit 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 the sheet glass; When the stress parameters value is greater than safety value in the sheet glass, software package triggering work, instruction process furnace type of heating is preheating, it is temperature required to be incubated, to heat, to be incubated, to heat, to be incubated, to be warming up to the sheet glass tempering.
What need understand is: though the foregoing description is to the mentality of designing of the utility model detailed text description of contrasting; But these text descriptions; Just the simple text of the utility model mentality of designing is described; Rather than to the restriction of the utility model mentality of designing, any combination, increase or modification that does not exceed the utility model mentality of designing all falls in the protection domain of the utility model.
Claims (5)
1. the process furnace of a numerical control convection current mixed radiation type of heating; It comprises process furnace; It is characterized in that: said process furnace middle plateform glass carries the above and below of ceramic roller to be respectively equipped with many branch wind pipes up and down, and branch wind pipe outlet air surface and heating unit work were controlled by the PLC unit about many heating units laid respectively at many.
2. the process furnace of numerical control convection current mixed radiation type of heating according to claim 1 is characterized in that: said upper and lower heating unit is vertical with ceramic roller to be arranged, many heating units are divided into a plurality of independently heating units and are connected with the PLC unit.
3. the process furnace of numerical control convection current mixed radiation type of heating according to claim 2 is characterized in that: the heating unit in said a plurality of independently heating units intersects control each other through a plurality of open-and-shut controllers.
4. the process furnace of numerical control convection current mixed radiation type of heating according to claim 2 is characterized in that: be provided with the wind-guiding sieve plate between said many heating units and the sheet glass.
5. the two formula process furnace of numerical control convection current radiation according to claim 1 is characterized in that: the adjustable power of said many heating units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120259245U CN202148251U (en) | 2011-07-21 | 2011-07-21 | Heating furnace adopting numerical control convective mixing radiation heating mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120259245U CN202148251U (en) | 2011-07-21 | 2011-07-21 | Heating furnace adopting numerical control convective mixing radiation heating mode |
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| CN202148251U true CN202148251U (en) | 2012-02-22 |
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| CN201120259245U Expired - Fee Related CN202148251U (en) | 2011-07-21 | 2011-07-21 | Heating furnace adopting numerical control convective mixing radiation heating mode |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344242A (en) * | 2011-07-21 | 2012-02-08 | 杭州精工机械有限公司 | Heating furnace with numerical control convective mixed radiation heating mode and heating method |
| CN102705866A (en) * | 2012-07-09 | 2012-10-03 | 上海市东方海事工程技术有限公司 | Air preheater frequency conversion self-optimization speed regulation control device |
| CN107515637A (en) * | 2017-08-07 | 2017-12-26 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate steel process course control method for use |
| CN107562085A (en) * | 2017-08-07 | 2018-01-09 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate steel process course control method for use |
| CN114988677A (en) * | 2022-06-02 | 2022-09-02 | 秦皇岛恒也玻璃科技有限公司 | Method for improving flatness of glass in width direction in tempering furnace |
| US11479495B2 (en) * | 2017-08-07 | 2022-10-25 | Luoyang Landglass Technology Co., Ltd. | Actuating mechanism control method for glass plate tempering process |
-
2011
- 2011-07-21 CN CN201120259245U patent/CN202148251U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344242A (en) * | 2011-07-21 | 2012-02-08 | 杭州精工机械有限公司 | Heating furnace with numerical control convective mixed radiation heating mode and heating method |
| CN102344242B (en) * | 2011-07-21 | 2015-10-21 | 杭州精工机械有限公司 | The process furnace of numerical control convective mixed radiation heating mode and heating means |
| CN102705866A (en) * | 2012-07-09 | 2012-10-03 | 上海市东方海事工程技术有限公司 | Air preheater frequency conversion self-optimization speed regulation control device |
| CN102705866B (en) * | 2012-07-09 | 2015-04-15 | 上海市东方海事工程技术有限公司 | Air preheater frequency conversion self-optimization speed regulation control device |
| CN107515637A (en) * | 2017-08-07 | 2017-12-26 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate steel process course control method for use |
| CN107562085A (en) * | 2017-08-07 | 2018-01-09 | 洛阳兰迪玻璃机器股份有限公司 | A kind of glass plate steel process course control method for use |
| CN107515637B (en) * | 2017-08-07 | 2020-08-28 | 洛阳兰迪玻璃机器股份有限公司 | Glass plate tempering process control method |
| US11479495B2 (en) * | 2017-08-07 | 2022-10-25 | Luoyang Landglass Technology Co., Ltd. | Actuating mechanism control method for glass plate tempering process |
| CN114988677A (en) * | 2022-06-02 | 2022-09-02 | 秦皇岛恒也玻璃科技有限公司 | Method for improving flatness of glass in width direction in tempering furnace |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20140721 |
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| EXPY | Termination of patent right or utility model |