CN2565820Y

CN2565820Y - Thermal equilibrium device of horizontal annealing furnance

Info

Publication number: CN2565820Y
Application number: CN 02263767
Authority: CN
Inventors: 盛耀忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-13
Filing date: 2002-08-13
Publication date: 2003-08-13
Anticipated expiration: 2012-08-13

Abstract

The utility model relates to a thermal equilibrium device of a horizontal toughened furnace, which is used for a working section of an electric heating furnace of toughened glass of a horizontal roller way type, and the utility model belongs to the technical field of a combustion device. The utility model is characterized in that the internal part of a groove of a shaped brick is provided with a heating element, the upper side of which is covered with one layer of steel tile, the upper side of which is tiled with alternate ceramic rollers. A heating method of simple structure and reasonable and compact structure of the utility model and thermal equilibrium of the steel tile can solve process requirements of uniform heating in the glass toughening; thermal radiation is caused to conduct uniform circulation in the furnace, and optimal thermal equilibrium effects of the toughened electric furnace can be obtained. Since heat storage effects of the steel tile are very favorable and energy saving effects of the toughened electric furnace are obvious, a heating element in the lower furnace body can be protected; frequency of failure of the heating furnace can be reduced, and the utility model can realize safety, high efficiency, high quality, and high yield.

Description

Heat balance device in the horizontal annealing furnace

Technical field:

The utility model relates to the heat balance device in a kind of horizontal annealing furnace, is used for belonging to the combustion equipment technical field among the horizontal roller formula toughened glass electrical heater working zone.

Technical background:

The horizontal tempering unit of glass is the composition of a system, is the film releasing section normally, adds electrothermal stove, shaped segment, quenching section, gets fragment.And add electrothermal stove is most important position in this unit.In horizontal tempering technology, it is absolute important making glass heats equably.The fundamental of the horizontal steel process of glass mainly contains: 1, glass must be heated to the tempering temperature of setting rapidly equably; 2, glass goes out process furnace to this process of quenching and does not allow to surpass 10 seconds, and the time is short more good more; 3, transmit must be steadily indeformable and do not produce other defective for glass; 4, quenching must be with suitable air pressure air flow quenching etc. equably.Reach above-mentioned processing requirement, in prior art, the thermal equilibrium mode of annealing furnace mainly adopts following several mode: 1, in the mode of top furnace roof with blowing balance furnace temperature.Thermal equilibrium mode with the TAMGLASS company of Finland is an example, they are vertical with the top firing element in the top of glass blowing equilibrium temperature by some, play the effect that glass is heated evenly, the manual voltage regulation valve regulation of thermal equilibrium wind, blast is neglected the thickness of glass size greatly and is decided.2, with the mode of bottom to up-draught balance furnace temperature.Heat balance system makes hot gas cycle to the blowing of stove internal upper part, and is identical so that lower surface on glass comparatively fast reaches temperature.3, use the mode of stainless steel plate balance furnace temperature at the bottom of the lower furnace.On the bottom electrical heating unit, lay one deck stainless steel plate, account for the hole on the stainless steel plate equably, warm air is circulated to top by these holes, the heat absorption heat release function of adding stainless steel plate is superior, the heat accumulation effect is good, furnace temperature after replenishing cold glass rapidly and advancing furnace temperature behind the stove and descend, and the steady balance of stove.Preceding two kinds with the thermally equilibrated mode of blowing, no matter, play the effect of temperature in the balance stove by last or impel hot gas cycle by katabatic wind, but this mode has a fatal weakness, because blowing mode equilibrium temperature will be used wind, wind is certain to reduce furnace temperature, also can take away furnace temperature.And the round-robin hot gas that varies in size in space is also different to be difficult to realize uniform balance to thermally equilibrated effect owing to glass in the stove blocks between wind glass.Sheet glass has blocked hot blast and has made ceramic roller can't accept heat energy from top (recycling heat energy of the direct heat energy of top blowing and bottom blowing), still can only unilaterally be heated to ceramic roller by the heating unit of bottom.So ceramic roller is because the contact of cold glass and heat-up rate after the decline temperature is relatively just slower.The third mode has then solved without wind also can the balance furnace temperature with steel, but also exposes some weak points in production practice.At first, though stainless thermal expansivity is more stable, in the annealing furnace of continuous high temperature, still can be out of shape, warpage, can an electric heating element be opened circuit owing to this distortion contacts with an electric heating element when serious.Have again, steel plate must occupy uniform hole, and when fried sheet fell sheet glass in the stove, glass can melt in the pyritous stove, glass metal can be connected between the hole of steel plate and heating unit, though glass is non-conductive, under the condition of high temperature, to conduct electricity, this conduction is damaged because of short circuit with regard to having produced frequent an electric heating element, ordinary production is interrupted, blowing out, cooling are keeped in repair, this process need long time.

Technology contents:

The purpose of this utility model is to overcome above-mentioned weak point, thereby provide a kind of rational type of heating steel watt thermal equilibrium in addition, can solve the even heating of most critical in the glass tempering, heat accumulation makes thermal radiation evenly circulation in stove, has reached the steel watt heat balance device of horizontal annealing furnace of the optimal heat counterbalance effect of tempering electric furnace.

Main solution of the present utility model is achieved in that

The utility model heat balance device is to adopt refractory brick and shaped brick 3 to be built in the steel plate body of heater in lower furnace body, it is characterized in that heating unit 4 is housed in the groove of shaped brick 3, is stamped one deck steel watts 2 above the heating unit 4, tiling ceramic rollers 1 at interval above the steel watts 2.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model steel tile structure vertical view;

Embodiment:

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

The utility model steel watt heat balance device is mounted in the interior bottom body of heater of horizontal annealing furnace.Its horizontal annealing furnace mainly is divided into top body of heater, bottom body of heater, and last lower furnace body is welded by steel plate, is placed with lagging material 5 in the body of heater.Steel watt heat balance device mainly adopts the heating unit 4 that the high life is housed in shaped brick 3 grooves, heating unit 4 adopts nichrome wire to make.Be stamped one deck stainless steel steel watts 2 on heating unit 4, stainless steel steel watt 2 shapes are made scalene triangle or waviness, help to shoulder heavy thing between the steel watts 2, and the area of steel watt and thickness are all than steel plate height, and the usefulness of therefore laying in heat energy is also higher.Steel watts 2 is rain-proof structures in addition, can prevent effectively that glass bursts sheet and makes bottom heating unit short circuit in the stove.Tiling is at interval less than the ceramic roller 1 of 40mm on steel watts 2.Adopt roller sealing shaped brick to separate with steel band and chain drive at the two ends of ceramic roller 1.Cold glass enters on the inherent ceramic roller of stove and transmits, and the top body of heater supporting with its thermal equilibrium cooperates shaped brick to be laid in the steel plate stove by lagging material equally, lagging material, shaped brick, and the heating unit bearing is fixed on the body of heater by the stainless steel drop hanger in the lump.

The utility model principle of work:

The regulation and control of bottom furnace temperature are carried out on the computer terminal.Owing to laid one deck steel watt above the heating unit, only need be fixed on a certain suitable temperature and get final product, this is to play the heat accumulation function owing to steel watt has absorbed a large amount of heat energy.Transmit when cold glass enters on the inherent ceramic roller of stove, the temperature on the ceramic roller generally can descend more, at this moment because the heat energy of ceramic roller steel down watt in time replenishes the very fast interior medial temperature of stove that can return to again of the temperature of roller-way.According to the heat energy principle that Q suction=Q is put, the heat release of large-area steel watt obtains balance with heat absorption advance the cold glass of stove in the extremely short time, and bottom and top heating unit replenish heat energy again after the steel watt heat release, and steel watt is in the deposit thermal energy state again.Circulation so repeatedly, though every three minutes the cold glass of left Slow ahead starboard! stove (refer to 5mm glass, the time of heavy sheet glass is longer relatively, less than the glass of 5mm then the time short), this three fens clock times are enough.With this 2700 * 6000mm specification horizontal roller tempering unit is example: the cold glass of a stove (about 13-14m ²) advance stove after, furnace temperature has only 2-3 ℃ of fluctuation, and restores to the original state soon.

Compared with the prior art the utility model has the following advantages:

1, owing in the body of heater of annealing furnace bottom, adopt stainless steel watt as thermal balance medium, simple in structure, Compactness, rational in addition steel watt thermal balance of mode of heating can solve evenly adding of most critical in the glass tempering This technological requirement of heat; 2, because the heat accumulation usefulness of steel watt is splendid, the energy-saving effect of tempering electric stove is obvious; 3, because the even heat release of the different angles of each side of the slit between the steel watt and steel watt exists heat radiation Uniform circulation in the stove has reached the optimal heat counterbalance effect of tempering electric stove; 4, heating distance is suitable; The bottom Heating element heater comprise steel watt to the distance of roller-way (glass) greater than 300mm, the top heating element heater is to roller-way The distance of (glass) satisfies the condition of optimal heat radiation regimes greater than 500mm; 5, glass is broken in the stove Go to sticks and staves lower time, steel watt can stop contacting of cullet and heating element heater, thereby has protected in the body of heater of bottom Heating element heater has reduced the fault frequency of heating furnace, can realize safety, efficient, high-quality, high yield.

Claims

1, the heat balance device in a kind of horizontal annealing furnace, comprise bottom body of heater, ceramic roller (1), shaped brick (3), it is characterized in that adopting and in shaped brick (3) groove, heating unit (4) is housed, be stamped one deck steel watt (2) above the heating unit (4), tiling ceramic roller (1) at interval above the steel watt (2).

2, the heat balance device in the horizontal annealing furnace according to claim 1 is characterized in that described heating unit (4) is an electrical heating wire.

3, the heat balance device in the horizontal annealing furnace according to claim 1 is characterized in that described steel watt (a 2) shape makes scalene triangle or waviness.