CN102219364A - Bottom lifting type resistance heating annealing furnace - Google Patents
Bottom lifting type resistance heating annealing furnace Download PDFInfo
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- CN102219364A CN102219364A CN 201110142550 CN201110142550A CN102219364A CN 102219364 A CN102219364 A CN 102219364A CN 201110142550 CN201110142550 CN 201110142550 CN 201110142550 A CN201110142550 A CN 201110142550A CN 102219364 A CN102219364 A CN 102219364A
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Abstract
The invention discloses a bottom lifting type resistance heating annealing furnace comprising a furnace body, a furnace cavity and a control device. A movable furnace bottom cover is arranged on the bottom surface of the furnace body, travelling wheels are arranged below the furnace bottom cover, the furnace bottom can be lifted under the driving of a lifting device, after being lifted, the furnace bottom cover is closely matched wit the furnace body so as to form a work bottom surface of the furnace cavity, and being descended, the furnace bottom cover drops on a matched track, and the travelling wheels can move on the track; a plurality of electric heaters are arranged on the side surface of the furnace cavity; a fan, the top guide plate and a side guide plate are arranged on the top end of the furnace cavity, a certain gaps is arranged between the side guide plate and the electric heater so as to form an air circulation channel, a cooling air channel is arranged on the furnace body, and used for sending cooling air into the furnace cavity. For the annealing furnace, the degree of automation is high; the processes such as loading, travelling, lifting of movable furnace bottom, heating for temperature rising, temperature reducing and the like are conducted under the control of the control device, and the degree of automation is high; and in the heating process, the annealing furnace achieves the demands that the furnace temperature uniformity is higher, the furnace temperature stability is higher, and the temperature reducing rate can meet the thermal treatment process.
Description
Technical field
The present invention relates to a kind of annealing furnace that workpiece is heat-treated, especially the end lift resistance annealing stove that special glass is heat-treated.
Background technology
In order to improve the performance of workpiece, improve by the thermal treatment under all temps condition in the prior art
The interior tissue of workpiece, surface hardness, eliminate stress etc., so that every mechanical index of workpiece reaches processing requirement.Annealing furnace of the prior art, the general effect that all has heat temperature raising, heating reaches the temperature of processing requirement under control device control, but during its cooling generally is exactly furnace cooling etc., accurately the slope of controlled temperature decline can't satisfy the heat treatment requirements that heats up and lower the temperature the high workpiece of accuracy requirement.As, a kind of annealing of large-sized special glass, glass size is ∮ 1500 * 200～300mm, temperature uniformity in the heat-processed≤± 3 ℃, furnace temperature stability≤± 1 ℃, soaking time 〉=100 h, rate of temperature fall carries out time variable control by processing requirement, no matter existing annealing furnace is in heating efficiency, temperature uniformity, the furnace temperature stability, rate of temperature fall, aspects such as the treatment capacity of every stove all can't satisfy actual needs, cause scrap rate high, and the salable product performance after its thermal treatment also only is just to meet the demands, can't reach more satisfactory situation, limit the use range of special glass, produce some disadvantageous consequences.
Summary of the invention
The present invention is directed to the annealing furnace of prior art, when handling some extraordinary workpiece at the aspects such as treatment capacity of heating efficiency, temperature uniformity, furnace temperature stability, rate of temperature fall, every stove, all can't satisfy actual needs, cause that scrap rate is high to be waited not enoughly, a kind of level of automation height, temperature uniformity height, end lift resistance annealing stove that the furnace temperature stability is strong are provided.
Technical scheme of the present invention: end lift resistance annealing stove comprises body of heater, burner hearth and control device; It is characterized in that: the bottom surface of body of heater is an active furnace bottom lid, be provided with travelling wheel below the furnace bottom lid, the furnace bottom lid can rise or descend under lifting device drive, cooperate with furnace sealing after rising, form the work bottom surface of burner hearth, fall after the decline on the same plane of the track that matches,, travelling wheel is moved in orbit by that carry or extraneous drive unit;
In the side of burner hearth, be provided with the electric heater that several subregions are arranged;
Top at burner hearth, be provided with the wind circulation device, the wind circulation device comprises blower fan, top flow deflector and side flow deflector, the top flow deflector of upper end below being arranged on blower fan of the vertical side flow deflector that is provided with is connected, between the lateral electric heater of side flow deflector and burner hearth certain clearance is arranged, form the wind circulation passage, the wind circulation passage is communicated with burner hearth by the ventilation opening of offering on outlet of side flow deflector bottom or the side flow deflector;
On body of heater, be provided with the cooling air pipeline, the cooling air pipeline feeds in the furnace wall, is hidden in several air outlets in the furnace lining, under the control device effect, cold wind is sent into and entered in the burner hearth after hot blast mixes again.
Further feature is: cover at furnace bottom and be provided with well heater.
The tail end of cooling air pipeline is set to some branch vents, and branch vent circumferentially evenly arranges along burner hearth, and every branch vent is respectively aweather in the circulation passage or feed cold wind in the burner hearth.
The end of the present invention lift resistance annealing stove with respect to prior art, has following characteristics:
1, level of automation height; Processes such as the lifting at the bottom of charging, walking, the travelling oven, heat temperature raising, cooling are all carried out under the programcontrol unit control of annealing furnace, and are increasingly automated;
2, adopted laser temperature-measuring and multi-region heating decoupling zero control (temperature difference control), silicon controlled power modulation, become the power regulation mode, make and reach higher furnace temperature homogeneity, furnace temperature stability etc. in the heat-processed, temperature uniformity≤± 3 ℃, furnace temperature stability≤± 1 ℃, soaking time 〉=100 h, rate of temperature fall carries out time variable control by processing requirement, satisfies the needs of thermal treatment process;
3, every mechanical index of the workpiece after the thermal treatment reaches and reaches processing requirement fully, and has reached more satisfactory situation, satisfies the thermal treatment needs of extraordinary workpiece.
Description of drawings
Fig. 1 is an annealing furnace structure front view of the present invention (analysing and observe);
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is a wind circulation device structural representation of the present invention.
Embodiment
The end of the present invention lift resistance annealing stove comprises body of heater 1, burner hearth 2 and control device, and body of heater 1 is made of the metal furnace shell on surface and the heat-resisting furnace lining of Qi Nei, and the cavity of body of heater 1 inside forms burner hearth 2, as the zone of workpiece placement to be heated; The bottom surface of body of heater 1 is the movable furnace bottom lid 3 that is provided with, and is provided with travelling wheel 4 below furnace bottom covers 3, constitutes the furnace bottom dolly, and the track 5 of travelling wheel 4 below being arranged on body of heater 1 cooperates, and can move (under that carrying or the extraneous drive unit effect) on the track 5; Furnace bottom lid 3 can rise or descend under lifting device 6 drive, and the back of rising is sealed and matched with body of heater 1 (fire door of sealing body of heater 1 bottom surface), forms the work bottom surface of burner hearth 2, falls after the decline on the track 5 that matches, and moves on track 5 by travelling wheel 4.Among the figure, shown lifting device 6 is a hydro-cylinder, is a kind of lifting device that surges, and drives liftings such as furnace bottom lid 3, travelling wheel 4.Moving of furnace bottom lid 3 and travelling wheel 4 can be adopted hydro-cylinder or motor etc.
In the side of burner hearth 2, be provided with some groups of electric heaters 7, electric heater 7 is an electric resistor heating type, the heating of energising back is with the workpiece in heating furnace 2 and the burner hearth 2 under control device control; Described electric heater 7 is set to two groups, three groups or four groups along body of heater 1 short transverse, but every group of independent control can be obtained better heating effect.
Referring to Fig. 4, top at burner hearth 2, be provided with wind circulation device 8, wind circulation device 8 mainly comprises blower fan 9, top flow deflector 10 and side flow deflector 11, the top flow deflector 10 of the upper end of the vertical side flow deflector 11 that is provided with below being horizontally installed on blower fan 9 is connected, between side flow deflector 11 and the burner hearth 2 lateral electric heaters 7 certain interval is arranged, form wind circulation passage 12, wind circulation passage 12 is communicated with burner hearth 2 by side flow deflector 11 bottoms, or passes through correct position at side flow deflector 11 (according to the placement location of heat treated part, height etc. is determined) on the ventilation opening offered be communicated with burner hearth 2.Blower fan 9 is the rotation of energising back under control device control, makes the air flowing in the wind circulation passage 12, and the heat that electric heater 7 is produced enters burner hearth 2 by the ventilation opening of offering on side flow deflector 11 bottoms or the side flow deflector 11, heating furnace 2 and interior workpiece thereof; Top flow deflector 10 is connected the top of burner hearth 2 by suspension rod bolt or reinforcing bar etc.Because circulating of air adopts air to conduct heat, and can improve temperature uniformity, furnace temperature stability etc., prevent that electric heater 7 direct heating positions from producing local superheating.
For the needs that heat and control, position such as in burner hearth 2, in the wind circulation passage 12, be provided with a plurality of temperature thermocouples and laser temperature-measuring probe, temperature probe is connected with control device, in the temperature parameter input control device, can show by the instrument in the control device, be convenient to that the operator watches or the needs of control automatically.
On body of heater 1, be provided with cooling air pipeline 13, the air intake of cooling air pipeline 13 can be arranged on body of heater 1 outside, in the cooling air pipeline 13 feeding wind circulation passages 12 or in the burner hearth 2; In order the time better homogeneity to be arranged in cooling, the tail end of cooling air pipeline 13 is set to some branch vents, and branch vent circumferentially evenly arranges along burner hearth 2, and every branch vent is respectively aweather in the circulation passage 12 or feed cold wind in the burner hearth 2; Every branch vent is hidden in the furnace lining and is provided with, in the corresponding wind circulation passage 12 of the air outlet of every branch vent or in the burner hearth 2.At temperature-fall period, need in burner hearth 2, feed freezing air, cooling air pipeline 13 is under the control device effect, the associated electrical movable valve is opened or is closed in right amount, extraneous freezing air enters by cooling air pipeline 13, branch vent, through cold wind with enter again in the burner hearth 2 after hot blast mixes, reduce the temperature of burner hearth 2.
In order to strengthen heats, furnace bottom lid 3 is provided with furnace bottom well heater 15, and furnace bottom well heater 15 also adopts electric resistor heating type, and the heating of energising back is with heating furnace 2 under control device control; 3Cr18Mn12Si2N high temperature steel drop-bottom is set on the furnace bottom well heater 15, and drop-bottom is polylith combination, overlap joint mutually.Glass plate product becomes two layerings to be shelved on the machine frame.Machine frame is placed on the drop-bottom, is lifted in the burner hearth and heats.
The furnace shell of body of heater 1 of the present invention adopts the steel plate of Q235 material different thickness and the shaped steel assembly welding of different size to become the cylinder bodily form, and enough structural strengths and rigidity are arranged.The heat-resisting lining Design of body of heater 1 of the present invention is taken into account hot strength and heat-insulating property, and different sites adopts different refractory materialss to build by laying bricks or stones; Furnace lining is fixed into one with the anchor rod that can stretch is whole with furnace shell; Furnace lining flame retardant coating external coating is coating material solidified, makes that it does not peel off under the high temperature and high speed airflow scouring, not efflorescence, cleans in the burner hearth keeping.Burner hearth 2 flame retardant coatings are selected the high-density vacuum forming ceramic fiber hard arc of customization for use, and with becoming seamless burner hearth after the high-temperature agglomerant bonding, on furnace shell, fissure of displacement layer is spread tapetum fibrosum, felt adiabatic heat-insulation to flame retardant coating behind the flame retardant coating by integral fastening.
Electric heater 7 of the present invention adopts Cr20Ni80 high-resistance electrothermic alloy band, turning to corrugated hangs on the little hook that inboard wall of burner hearth presets, and reinforce, place on the wind circulation passage that forms between ventilating duct (side flow deflector 11) and inboard wall of burner hearth, make its heat exchange abundant.
Movable furnace bottom lid 3 adopts from walking vehicle structure.Lifting device 6 is provided as hydraulic lifting apparatus, and dolly rises together with carriage is whole, and the sealing fire door can be voluntarily along body of heater below track travel after dolly decline puts in place; Hydro-cylinder does not have the lifting of impact synchronously under oil piping system control synchronously, stable action, stroke are accurate.
Adopt the labyrinth type double-layer seal between the fire door of travelling oven bottom 3 and burner hearth 2 bottoms, no hot gas flow leaks.Hydraulic lifting device is by two inverted engineering hydro-cylinders, and two groups of travelling block, fixed pulley, haulage gear, furnace bottom trolley brackets are formed.After furnace bottom shrouding 3 is raised to the position, seal up fire door steadily in the long term.
On the blower fan 9(furnace roof that the top of burner hearth 2 is provided with) be a high temperature frequency conversion stove big air quantity recirculation blower of centrifugal water cold type, fixedly hang the arc wind waveguide plate of high temperature steel material on the squirrel-cage framework in burner hearth, the top air deflector is provided with horizontal guiding device, form the high wind recycle system, forced draft from up to down, level shunting reciprocation cycle.Bring the well heater heat into workspace and glasswork workpiece, carry out sufficient heat exchange, and finish homo genizing annelaing.
During cooling, according to process stipulation, workpiece insulation is after certain hour, will be with rate of temperature fall extremely slowly, slow cooling is to the temperature of processing requirement: 1, temperature lowering curve and rate of temperature fall are set in the sequence of control of control device, stepless ground changes stove internal heating power.2, infeed cold wind in right amount in body of heater downside cooling air pipeline 13, the cold blast engine variable frequency adjustment is converted with the high-temperature heat flux accent, discharges useless wind.The cold wind amount of feed and hot blast output.Controlled by the list-directed motorized valve of thermometer, realize full-automatic.Under the effect of sequence controller pressure regulation amplitude limit, the burner hearth heat supply can be successively decreased lentamente; It is supplementary means (will carry out automatically as required during the heat debugging) that an amount of cold wind is supplied with.The input channel of cooling air pipeline 13 links to each other with blower outlet through electric butterfly valve.Electric butterfly valve is subjected to the instruction of temperature program(me) and stepless switching, and the input cold blast rate is done to regulate continuously.Cold wind enters from a plurality of wind orifice flows, and behind the hot gas flow uniform mixing, flows in an orderly manner in the burner hearth inboard, finely tunes.
On burner hearth 2 tops, near the fire door place, be evenly distributed with a plurality of waste hot gas discharge orifices on the circumference, these a plurality of waste discharge hot gas communicate with body of heater one annular gas collector and are integral; Unnecessary hot gas must could outwards discharge by behind the electric butterfly valve that is subjected to programmed instruction equally.
Silicon controlled rectifier PID Power Regulation is adopted in this furnace temperature control (part of control device), and the phase shift firing control is divided three-temperature-zone control.Temperature control instrument is selected the Japanese mountain military DMC50 of company multiloop sequence controller for use, this controller has abundant controlled function and various control algorithm, control algolithm adopts the temperature gap control between many warm areas, can solve during three districts independently control a generation coupled difficult problem effectively.Because of its have the precision height (± 0.05～0.1%FS), the characteristics of response speed fast (50MS), auxilliary again have the various control algorithm, can obtain high-quality omnidistance stable control effect, this controller and man-machine interface communicate to connect with RS-485.Man-machine interface is selected the intelligent man-machine interface of the military EST555Z of company in Japanese mountain for use
Claims (3)
1. end lift resistance annealing stove comprises body of heater (1), burner hearth (2) and control device; It is characterized in that: the bottom surface of body of heater (1) is the movable furnace bottom lid (3) that is provided with, be provided with travelling wheel (4) below the furnace bottom lid (3), furnace bottom lid (3) can rise or descend under lifting device (6) drive, be sealed and matched with body of heater (1) after rising, form the work bottom surface of burner hearth (2), fall after the decline on the track (5) that matches, on track (5), move back and forth by travelling wheel (4);
Side in burner hearth (2) is provided with some groups of electric heaters (7);
Top in burner hearth (2), be provided with wind circulation device (8), wind circulation device (8) comprises blower fan (9), top flow deflector (10) and side flow deflector (11), the top flow deflector (10) of the upper end of the vertical side flow deflector (11) that is provided with below being arranged on blower fan (9) is connected, between side flow deflector (11) and the lateral electric heater of burner hearth (2) (7) certain interval is arranged, form wind circulation passage (12), wind circulation passage (12) is communicated with burner hearth (2) by side flow deflector (11) bottom or the ventilation opening offered on side flow deflector (11);
On body of heater (1), be provided with cooling air pipeline (13), in cooling air pipeline (13) the feeding wind circulation passage (12) or in the burner hearth (2).
2. according to lift resistance annealing stove of the described end of claim 1, it is characterized in that: furnace bottom lid (3) is provided with furnace bottom well heater (15).
3. according to claim 1 or 2 lift resistance annealing stoves of the described end, it is characterized in that: the tail end of cooling air pipeline (13) is set to some branch vents, branch vent circumferentially evenly arranges along burner hearth (2), and every branch vent is respectively aweather in the circulation passage (12) or feed cold wind in the burner hearth (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110142550A CN102219364B (en) | 2011-06-21 | 2011-06-21 | Bottom lifting type resistance heating annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110142550A CN102219364B (en) | 2011-06-21 | 2011-06-21 | Bottom lifting type resistance heating annealing furnace |
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| Publication Number | Publication Date |
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| CN102219364A true CN102219364A (en) | 2011-10-19 |
| CN102219364B CN102219364B (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110142550A Expired - Fee Related CN102219364B (en) | 2011-06-21 | 2011-06-21 | Bottom lifting type resistance heating annealing furnace |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102586553A (en) * | 2012-03-15 | 2012-07-18 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
| CN102757171A (en) * | 2012-07-12 | 2012-10-31 | 湖北新华光信息材料有限公司 | Annealing furnace |
| CN102849931A (en) * | 2012-06-14 | 2013-01-02 | 湖北新华光信息材料有限公司 | Optical glass rapid quenching furnace |
| CN102952928A (en) * | 2012-11-14 | 2013-03-06 | 苏州新长光热能科技有限公司 | Novel aluminum material annealing furnace with bottom loading |
| CN103074555A (en) * | 2011-10-25 | 2013-05-01 | 苏州新长光热能科技有限公司 | Aging furnace for section bar |
| CN103131971A (en) * | 2011-11-23 | 2013-06-05 | 苏州新长光热能科技有限公司 | Novel aluminium profile divided-chamber aging furnace |
| CN105296710A (en) * | 2015-10-26 | 2016-02-03 | 佳马机械涂覆科技（苏州）有限公司 | Aluminum alloy aging oven with lower opening |
| CN106746541A (en) * | 2016-12-26 | 2017-05-31 | 重庆天和玻璃有限公司 | A kind of annealing furnace for glass bottle |
| CN107502700A (en) * | 2017-09-03 | 2017-12-22 | 杭州谱诚泰迪实业有限公司 | A kind of protection device of fixed furnace lining thickness measurement with laser scanner |
| CN107655018A (en) * | 2017-09-14 | 2018-02-02 | 芜湖市通达锅炉有限公司 | A kind of dual purpose steam water boiler is refooted device with deashing |
| CN108383365A (en) * | 2018-04-11 | 2018-08-10 | 中国建筑材料科学研究总院有限公司 | A kind of method for annealing of quartz glass |
Families Citing this family (1)
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| CN102875018B (en) * | 2012-10-09 | 2015-04-01 | 中天科技精密材料有限公司 | High-purity glass rod heating and insulation unit and heating and insulation method thereof |
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- 2011-06-21 CN CN201110142550A patent/CN102219364B/en not_active Expired - Fee Related
Patent Citations (3)
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| US3997317A (en) * | 1975-03-24 | 1976-12-14 | E. W. Bowman Incorporated | Glass annealing lehr having gas and electric heating means |
| CN2615616Y (en) * | 2003-04-11 | 2004-05-12 | 北京七星华创电子股份有限公司 | Bottom up-down device for vertical furnace |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074555A (en) * | 2011-10-25 | 2013-05-01 | 苏州新长光热能科技有限公司 | Aging furnace for section bar |
| CN103131971A (en) * | 2011-11-23 | 2013-06-05 | 苏州新长光热能科技有限公司 | Novel aluminium profile divided-chamber aging furnace |
| CN102586553A (en) * | 2012-03-15 | 2012-07-18 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
| CN102586553B (en) * | 2012-03-15 | 2014-07-16 | 重庆飞达电炉有限公司 | High precision titanium alloy resistance heating furnace |
| CN102849931B (en) * | 2012-06-14 | 2015-01-14 | 湖北新华光信息材料有限公司 | Optical glass rapid quenching furnace |
| CN102849931A (en) * | 2012-06-14 | 2013-01-02 | 湖北新华光信息材料有限公司 | Optical glass rapid quenching furnace |
| CN102757171B (en) * | 2012-07-12 | 2014-07-09 | 湖北新华光信息材料有限公司 | Annealing furnace |
| CN102757171A (en) * | 2012-07-12 | 2012-10-31 | 湖北新华光信息材料有限公司 | Annealing furnace |
| CN102952928A (en) * | 2012-11-14 | 2013-03-06 | 苏州新长光热能科技有限公司 | Novel aluminum material annealing furnace with bottom loading |
| CN105296710A (en) * | 2015-10-26 | 2016-02-03 | 佳马机械涂覆科技（苏州）有限公司 | Aluminum alloy aging oven with lower opening |
| CN106746541A (en) * | 2016-12-26 | 2017-05-31 | 重庆天和玻璃有限公司 | A kind of annealing furnace for glass bottle |
| CN106746541B (en) * | 2016-12-26 | 2019-05-28 | 重庆重玻节能玻璃有限公司 | A kind of annealing furnace for glass bottle |
| CN107502700A (en) * | 2017-09-03 | 2017-12-22 | 杭州谱诚泰迪实业有限公司 | A kind of protection device of fixed furnace lining thickness measurement with laser scanner |
| CN107655018A (en) * | 2017-09-14 | 2018-02-02 | 芜湖市通达锅炉有限公司 | A kind of dual purpose steam water boiler is refooted device with deashing |
| CN108383365A (en) * | 2018-04-11 | 2018-08-10 | 中国建筑材料科学研究总院有限公司 | A kind of method for annealing of quartz glass |
| CN108383365B (en) * | 2018-04-11 | 2020-09-15 | 中国建筑材料科学研究总院有限公司 | Annealing method of quartz glass |
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| CN102219364B (en) | 2012-09-26 |
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Granted publication date: 20120926 Termination date: 20170621 |