CN106145659A - For transmitting the equipment of glass plate on the air-supported platform in heating furnace - Google Patents

Abstract

The present invention provides a kind of at air-supported (9) of the heating furnace upper equipment transmitting glass plate, and described air-supported includes wind pushing hole (12) and steam vent (1).Described wind pushing hole is connected to be positioned at the pumping chamber (7) of described air-supported (9) lower section.Described steam vent (1) is connected to the exhaust passage (2) in described air-supported inside, and the first end of described exhaust passage leads in heating furnace (0) or is provided with closing gate valve (13) that is that can close and that can open.Second end of described exhaust passage (2) leads to intake line (3) or is provided with obstruct gate valve (11) that is that can close and that can open.The described intake line (3) of air blast is positioned at the side contrary with conveyer (10) of described air-supported (9), described conveyer and glass contact.Intake line (3) between described exhaust passage (2) and described air blast (5) is provided with the by-pass gate (4) that can regulate for air-supported at least one regulating glass.

Description

For transmitting the equipment of glass plate on the air-supported platform in heating furnace

Technical field

The present invention relates to the equipment for transmitting glass plate on the air-supported platform in heating furnace, this sky The top surface of gas supporting station is arranged with respect to the inclination angle that horizontal plane forms 0-20 °, and described equipment is at sky The edge of gas supporting station includes transfer roller, and wherein the top surface of air-supported is towards this edge tilt. If transfer roller is substituted by the conveyer with glass contact, then air-supported is horizontally disposed with is also feasible 's.In air-supported stove, glass is heated to temperature.Described air-supported comprises air-supply Hole and steam vent.The air flowing through wind pushing hole below glass produces main relative in stove under glass Superpressure for pilot power, glass floats on airbed based on this superpressure.The superpressure of supporting glass is in pressure Its peak value is reached at power hole.Steam vent prevents glass protruding, this is because the sky sent into below glass Gas can not only pass through the edge loss of glass and can pass through other local loss." glass is protruding " is Refer to that a bearing capacity below glass for the glass and airbed bend to projection at middle part than when edge is high Shape.Owing to glass rigid raises with thickness reduction and temperature and reduces the generation promoting described projection.

Background technology

Glass has about 2500kg/m³Density.In order to make glass float, averagely surpassing below glass Pressure must be about every millimeter of thickness of glass of 25 handkerchief.It is therefoie, for example, 10mm glass requires under it Superpressure in the airbed of side is about 250 handkerchiefs.Controlled by changing the superpressure in the pumping chamber below platform System air-supply, the oral area of wind pushing hole is positioned at described pumping chamber.Regulated by changing the rotating speed of air blast So-called blast pressure.Steam vent on supporting glass impact depend on the quantity in hole, hole diameter with And the air-tightness of the flow channel the path of stove is returned to from steam vent.If exhaust passage is connected to This air blast, the impact of steam vent additionally depends on the suction pressure being produced by air blast at steam vent. When ventilation aperture area increases, wind pushing hole needs the blast pressure constantly increasing in order to make glass float, Thus offer has the average superpressure of aforesaid about 25 every millimeter of thickness of glass of handkerchief below glass Airbed.

In publication US 4,200,446, the known a kind of and above-mentioned air for the heating furnace of glass plate props up The similar gas hearth block of cushion cap, the exhaust passage that wherein steam vent is connected in hearth block.Air blast It is arranged on the outside of actual furnace chamber and be close to described stove.Air blast directly extracts air from stove.Relatively The superpressure that pressure in exhaust passage produces in airbed according to the weight of glass is made by steam vent Air is transferred to exhaust passage below glass, and air returns from siege by the end of this exhaust passage Return in stove.Due to the superpressure in airbed, exist relative to the main pressure in stove in this exhaust passage The superpressure of power.When the superpressure in airbed is when the increase of thickness of glass increases, pass through steam vent Air mass flow increases.The impact on supporting glass plate for the steam vent cannot be regulated by any way.

Air-supported of known glass plate similar to above, Qi Zhongpai in publication EP 1 836 115 Pore is connected to be positioned at the exhaust chamber at below platform top.Air is entered from exhaust chamber by air blast In pressure pipeline, air passes through wind pushing hole at glass flowing underneath from this pressure pipeline.Air blast is only Being connected to exhaust chamber and not receiving air from other places in suction side.Air blast produces and sucks The negative pressure relative to stove in pressure, i.e. exhaust chamber, and air is drawn into steam vent, i.e. Make not exist glass on platform.In this scenario, the suction pressure in exhaust chamber and at steam vent exists Blast pressure always inevitably raises when increasing.Steam vent on supporting glass impact thus can not Regulate individually by any way.The premise that (supporting station) runs is to exist between glass enough Space is so that a big chunk of steam vent will be located in the region not having glass.Air blast subsequently will be straight Connected the steam vent extraction air being positioned at the region not having glass.When glass covers whole steam vents When, glass no longer can be floating, or is in the soda-lime glass thin more than the one of 600 DEG C in tempering furnace To at least be sucked into contact with described due to strong local suction subsequently.

The air of a kind of glass plate heating furnace similar to above is there is known in publication US 8 297 077 Supporting station, wherein, wind pushing hole does not have united pumping chamber.Wind pushing hole is connected to pressure pipeline and arranges Pore is connected to exhaust passage.Air by air blast from exhaust passage feed pressure pipeline, air from This pressure pipeline passes through wind pushing hole at glass flowing underneath.Air blast is connected to be positioned at the exhaust of suction side Passage.In addition, be outlet opening (hatch) in the suction side of air blast, air is by this outlet opening It is directly flowed in stove air circulation.The volume flow that publication discloses by outlet opening instead of From the volume flow being drained into stove between glass and air table edge.It is further obvious that owing to following The suction side of ring fan is always identical with quality stream on the pressure side.Publication does not disclose a gate and is used for adjusting Save air-supported.Publication does not limit the sectional area of gate, but the ratio of Fig. 1 C according to publication, The diameter of the connecting tube of gate is approximately the 1/4 of the diameter of the suction inlet of air blast.Therefore, connecting tube Sectional area, i.e. the maximum secting area of outlet opening is only the 1/8 of the suction inlet of fan.Due to wind Fan is permanently attached to exhaust passage, it is impossible to obtain zero suction pressure.In publication, exhaust passage only exists The side of fan opens up, because the opposite end of exhaust passage is closed regularly.In publication, give Fixed 50 handkerchiefs (0.5 millibar) are the maximum differential pressure along pressure pipeline, i.e. Maximum Pressure Boost is not constant 's.Do not have given accordingly along the suction pressure change of exhaust passage.In publication, pressure pipeline is even Receive be positioned at exhaust passage opposite side air-supported.Therefore there is not the space for transfer roller.

Content of the invention

It is an object of the invention to provide the equipment of a kind of the above-mentioned type, wherein blast pressure is constant, and By means of this equipment, the impact on supporting glass for the steam vent can be better controled over.According to the present invention by Realize this purpose in the feature described in claim 1.Dependent claims discloses the preferred of the present invention Embodiment.

In the present invention, be provided with in air duct be positioned at air blast suction side, be in such as publication The adjustable gate valve of the corresponding position in US 8 297 077.This gate valve is referred to as by-pass gate, due to The air flowing through during this gate valve circulates to air walks around this exhaust passage, and is not passed through air-supported Exhaust passage.A part for the volume flow of air blast passes through steam vent and the air of air-supported from stove The end of the exhaust passage of supporting station is pumped in passage, and the end of described exhaust passage is opened, This is contrary with publication US 8 297 077.Being corresponded to the pass by the volume flow of by-pass gate is not had The wind pushing hole in the region of glass or from the volume flow being drained between glass edge and air table stove.? In tempering furnace, glass is definitely not continuous print lath but has at least 150mm gap each other Single plate.In air-supported, only one piece glass (rather than polylith) can move in parallel.Glass Width seldom, be equal to the maximum of width in air blast region.Some wind pushing holes of air-supported Thus there is not glass all the time at their tops.

When by-pass gate is opened, superpressure in the pumping chamber of air-supported lower section, i.e. blast pressure Power raises relative to the pressure in stove or outside stove, and suction pressure reduces.Master in stove and outside stove Pilot power is generally essentially identical.Suction pressure refers to be produced in exhaust passage by the suction of air blast Negative pressure relative to the leading pressure in stove or the leading pressure outside stove.Because opening gate valve to contribute to Supplying air to air blast, blast pressure increases.Suction pressure in exhaust passage air also by By-pass gate flow to reduce during air blast.Suction pressure in exhaust passage can opened by by-pass gate Oral area bigger when reduce.

The impact on supporting glass for the steam vent can be regulated by means of by-pass gate.Due to the shadow to steam vent The regulation ringing meets manually regulation, and wherein by-pass gate rule of thumb information is for example beaten according to thickness of glass Open or close and close.Necessarily suction pressure is not measured.

More complicated regulation can be based on the suction pressure of measurement.Suction pressure can be for example logical from an exhaust Road is measured.When glass be in air-supported middle when, this reduce the actual circulation area of steam vent, as Described in the application end.Accordingly, because the hole area leading in stove in the suction side of air blast is Less, this reduction of ventilation aperture area significantly increases suction pressure.Therefore, it is carried on air to prop up The size (surface area) of the glass on cushion cap affects suction pressure.Sufficiently large adjustable by-pass gate Making the such suction pressure rank in exhaust passage be feasible, this suction pressure will flow into Enough air of airbed are removed by wind pushing hole to prevent glass protruding.Excessive suction pressure is led Cause the position attachment that suction pressure first in steam vent row for the glass reduces the supporting of glass significantly On air-supported platform.In the device in accordance with the invention, when by-pass gate is fully open, air The suction pressure at the air blast of exhaust passage in the exhaust passage of supporting station is less than 50 handkerchiefs (negative pressure), When there is not any glass on air-supported platform；It is preferably shorter than 25 handkerchiefs (negative pressure) or be less than blast pressure The 10% of power.When glass covers air-supported, the negative pressure recording from exhaust passage increases, but 100 handkerchiefs will not be exceeded.

By preventing the direct flowing from the exhaust passage of air-supported to air blast by the second gate valve, Suction pressure vanishing can be made.This gate valve is referred to as intercepting gate valve.When floating heavy sheet glass, lock will be intercepted Valve portion or to completely close be favourable, this is because make heavy sheet glass at air table by same air blast On gradually to move be possible.

Compared to thin glass, in the case that the superpressure in airbed is higher than fringe region at middle part, thick Glass is not easy on airbed projection.Increased not only by thickness and by relatively low temperature Rigidity, this temperature is final heating-up temperature, this temperature is applicable to heavy sheet glass.Increase The material behavior of big glass stiffness is for for example becoming apparent from than during at 650 DEG C when 630 DEG C.With regard to heavy sheet glass For, it is obvious that the impact of the glacing flatness on glass for the steam vent is not so good as in thin glass.For airbed Maximal support pressure obtain when there is not steam vent.The impact of steam vent can be added by closedown Intercepting gate valve and closing gate valve being eliminated, this obstruct gate valve also turns off the exhaust of air-supported The other end of passage.Air thus will be able to spill into Anywhere by the steam vent of described, and And steam vent thus weakened treatment will be had to the supporting of glass.This thus be equal to the row of being completely absent Pore.

Brief description

The embodiments of the invention hereinafter with reference to brief description, wherein:

Fig. 1 shows top view and the perspective view of air-supported；

Fig. 2 shows the signal of air-supported of the reference with air circulation system each several part Property sectional view；

Fig. 3 shows the air stream when gate valve 4 partially opens；

Fig. 4 shows the air stream when gate valve 4 is opened；

Fig. 5 shows the air stream when gate valve is closed；

Fig. 6 is corresponding with Fig. 5, but gate valve 11 is positioned at different positions；

Fig. 7 shows the air stream when the gate valve 11 and 13 of the end being positioned at exhaust passage is closed.

Detailed description of the invention

Fig. 1 shows top view and the perspective view of air-supported 9 of the pottery with transfer roller 10. Fig. 2 is the sectional view of air-supported and the passage being connected on it.One air-supported furnace apparatus covers Partial-length and the air blast 5 with passage of air-supported 9 are covered.Glass G floats on platform 9. Is the thin airbed with 0.2-0.8mm thickness between glass G and platform 9.In figures 2-7, It is horizontal for air-supported 9.In fact, be provided with the sky of transfer roller 10 and associated components thereof Gas supporting station 9 is at the angle being inclined relative to horizontal 1-20 °, has the one of transfer roller 10 Side is compared to having the side of air blast 5 closer to ground.This inclination makes the lateral edges pressure of glass G Lean against on transfer roller 10.Gait of march in stove for the glass G is equal to the peripheral speed of transfer roller 10. Having steam vent 1 for air-supported 9, this steam vent leads to the rectangle exhaust passage 2 being positioned at platform.Row The end in transfer roller 10 side of gas passage 2 leads to stove 0 and relative end is connected to air blast The intake line 3 of 5.One air blast 5 extracts air from several exhaust passages 2.Intake line 3 have the hole leading to stove 0, and the circulation area in this hole can use by-pass gate 4 to be adjusted.Can set Have several bypass openings and gate valve 4.When completely opened, stove 0 is led to by what gate valve 4 was opened The circulation area ∑ A4 in hole is at least the 25% of circulation area A5 of the suction inlet of air blast 5.Air blast Machine 5 forced air and air is caused pumping chamber 7 by over pressure pipeline 6.Plenum wall is by stove Substrate, air-supported 9 and bearing partition 8 constitute.In pumping chamber 7, the oral area of wind pushing hole 12 The air pressure at place is constant.In the case of there is not glass at the top of wind pushing hole, air via The wind pushing hole 12 of the whole thickness extending through air-supported 9 is drained into and is positioned at below glass G Airbed, or be directly discharged in stove 0.It is logical that air spills into exhaust from airbed via steam vent 1 In road 2, and spill in stove 0 via the edge of airbed.In air-supported, wind pushing hole 12 It is arranged in rows with steam vent 1.Pressure reduction between pumping chamber 7 and stove 0 or the external environment condition of stove is by pressure Measure, thus known blast pressure and this blast pressure adjustable.

Mark the reference of each parts in fig 1 and 2.In order to clear, in Fig. 3 and 7 only Mark the reference of gate valve.Fig. 3-7 shows the air stream in the cross section of Fig. 2.At accompanying drawing In flow path different from each other due to position or the arrangement of gate valve.Accompanying drawing is concentrated and is described air blast 5 The difference of flowing of suction side, and be intended to illustrate the change of volume flow in the change in size of suction side arrow Change, the corresponding bigger volume flow of bigger arrow.Hereinafter, but, almost little to air blast Flowing on the pressure side illustrates.

The change of the suction side of air blast 5 also affects the change on the pressure side of air blast.For example, only beat Open by-pass gate 4 and also increase the volume flow on the pressure side of air blast 5.Therefore, air blast can be reduced Rotary speed to obtain initial volume flow.Additionally, when glass G is placed on wind pushing hole, reduce The air stream discharged from wind pushing hole, because counter-pressure approximately proportionally increases with the weight of glass. On the other hand, meanwhile, the pressure in pumping chamber 7 also increases to a certain degree.When glass G is placed on sky When on gas supporting station 9, carry out the air-flow of wind pushing hole that free glass cover lives and somewhat reduce, and from not having The air-flow of glassy zone somewhat increases.But in all cases, represent the arrow of air-flow at air blast Be all on the pressure side identical.

Difference between Fig. 3 and 4 is the position of by-pass gate 4.In Fig. 3, gate valve 4 only part Open.Then create stronger suction pressure in exhaust passage 2, i.e. relative to pressure in stove 0 Negative pressure, in this case, is entered into by the end of transfer roller 10 side of steam vent 1 and passage Air velocity in passage 2 is higher.In the diagram, gate valve 4 is obvious more than open in Fig. 3.When When gate valve 4 is opened, the suction pressure in exhaust passage reduces, and flows to the even more little of air blast 5 The volume flow of ratio can flow through steam vent 1.Therefore, the steam vent shadow floating to weakening glass is reduced Ring.The bypass lock making glass abundant and flatly floating can be found out based on the adjustable range of by-pass gate 4 The position of valve 4 and the rotary speed of air blast 5.

Fig. 5 and 6 shows when obstruct gate valve 11 blocks the exhaust passage 2 that air is by air-supported It is fed directly to the air stream during intake line 3 of air blast.Difference between Fig. 5 and 6 is resistance Position every gate valve 11.

In Figure 5, in being positioned at the airbed below glass, produced superpressure forces air via row Pore 1 enters in exhaust passage 2, and wherein air is from the end stream of the transfer roller side of exhaust passage Enter in stove 0.Therefore air only flows in one direction.In exhaust passage 2 in the flowing direction Flow velocity increase, and simultaneously static pressure reduces.Therefore, between airbed and exhaust passage 2 Pressure reduction in the flowing direction increases and makes supporting on air-supported platform for the glass slightly be inclined to one Limit.

In figure 6, the closedown intercepting gate valve 11 has been cut off from exhaust passage 2 to intake line 3 Direct flow path and open flow path from exhaust passage 2 to stove.Therefore, figure is eliminated The problem toward an inclination of the glass support at place shown in 5.

Fig. 7 shows and flows into drum when obstruct gate valve 11 blocks air by the exhaust passage of air-supported The intake line 3 of blower fan and closing gate valve 13 block (air) transfer roller side from exhaust passage Air stream when in end inflow stove 0.In the figure 7, exhaust passage 2 does not exist flowing, because of Can not flow further from them for air.

In figs. 5 and 6, produced in discharge duct 2 by air blast by using obstruct gate valve 11 to eliminate Raw suction pressure, reduces the reduction of the average superpressure (i.e. the supporting of glass) to airbed for the steam vent Effect.In the figure 7, also the airbed being caused by glass deadweight and row are eliminated by closing gate valve 13 Pressure reduction between gas passage.In the figure 7, there is not impact in the average superpressure on airbed for the steam vent, That is, the supporting to glass for the airbed is in maximized situation.

Described the example of the use of gate valve by three below example, wherein change glass to be tempered The thickness of glass.Glass is all tempered in all cases.To resistant to bending cross sectional moment of inertia with thickness of glass Cube increases.For thin 2mm glass, temperature is 670 DEG C, for 6mm glass It for glass is then 630 DEG C, and be then 620 DEG C for 10mm glass.At about 600-700 Within the temperature range of DEG C, glass changes into plastic material from elastomeric material, thus more than 600 DEG C At a temperature of, the elastic modelling quantity of glass is not specifically defined.When glass temperature from rise to 670 DEG C for 620 DEG C when, The elastic modelling quantity of glass is substantially down to about 1/5.When elasticity is when temperature reduces, glass increases with continuous Big speed creep, i.e. bends over time.

Under its temperature, thin 2mm glass is flexible and Quick-forming props up to mate air Supporting difference in the airbed of cushion cap.Therefore, it is necessary to make the bearing strength as much as possible of airbed Show and enable stove to produce straight glass.This is impossible in the case of not having steam vent 1. By-pass gate 4 is half-open to provide suitable low suction pressure in an exhaust gas.For example, with air The height of bed increases and reduces the risk scratching glass, because glass is no longer possible partly or instantaneous Ground and platform collision.On the other hand, as the height of airbed increases, glass is protruding to be increased.Avoid The end of projection, i.e. stove is the closer to the uniformity then supporting is more important, and therefore, is being positioned at In the device of the end of stove, by-pass gate can be closed slightly more somewhat to increase suction pressure And to reduce the height of airbed.But, suction pressure may be too high, and the traveling of glass Speed must be sufficient to prevent local support maximum (at wind pushing hole arrangement) and minimum (at steam vent At arrangement) between be alternately repeated give one, glass fluctuation shape.Gate valve 11 and 13 is not necessarily 's.

The 6mm glass of intermediate gauge is more firm compared to 2mm glass under its temperature. In order to float, 6mm glass needs the superpressure exceeding three times than 2mm glass in airbed. This pressure can still be by making the rotary speed of air blast 5 increase to close to maximum and by completely Open by-pass gate 4 and produce.Opening by-pass gate 4 increases blast pressure, i.e. pumping chamber 7 and stove Pressure reduction between 0, and reduce suction pressure.The part closedown intercepting gate valve 11 is also necessary, If it is desire to reduce the rotation of air blast.Do not need to close gate valve 13.

Thick 10mm glass glass than 6mm under its temperature is even firmer.For Floating, thick 10mm glass needs to exceed five times super than 2mm glass in airbed Pressure.Even if the rotary speed at air blast 5 is in its maximum and gate valve 4 fully opens, this glass Glass also will not float.Even completely close obstruct gate valve 11 also cannot realize.Although making closure gate Valve 13 cuts out and does not interferes with blast pressure, but can increase putting down in the airbed below glass considerably Equal superpressure and make even 10mm glass float.

Great majority glass to be tempered is that 6mm is thick or even more thin, in this case, in order to Regulate air-supported, beat opening/closing by-pass gate 4 and regulate the speed of air blast 5 and can meet and want Ask.Intercept gate valve 11 and closing gate valve 13 enhances the floating ability of air-supported stove and constantly adds Hot heavy sheet glass is to temperature.

Above three example is merely exemplary.It is all difficult in any case or even may not Make the wind pushing hole of air-supported and pressure port is sized such that the rotation being adjusted merely by air blast Rotary speed is embodied as various sizes provides abundant and consistent supporting with the glass of thickness.Air blast Size sets and is limited by air blast and air duct free space.

The external dimensions of stove becomes much larger with air blast and increases.By-pass gate 4 is together with to air blast The regulation of rotary speed make it possible to regulate the impact on glass support for the steam vent 2, blast pressure simultaneously Trying hard to keep, it is constant to hold.Intercept gate valve 11 to make it possible to suction pressure is adjusted to zero.By means of obstruct gate valve 11 and close gate valve 13, can make air-supported in the case of there is no steam vent work.Can be from stove Outside (stove i.e. need not be made to cool down) performs manually or electrically all above-mentioned regulations.

Therefore, it is an object of the invention to provide the equipment of a kind of the above-mentioned type, wherein, blast pressure is Constant and by means of this equipment, the impact on glass support for the steam vent can be controlled even betterly.Logical Cross and use the single pumping chamber with the wind pushing hole being connected on it to replace single pressure pipeline, energy Obtain constant blast pressure.By steam vent can be regulated individually on the impact of glass support and more Depend on the degree of load of air table less, preferably regulation can be realized.

Can obtain relative to existing by means of the equipment described in the independent claims according to present patent application The combination of the aforementioned advantages of air-supported of technology stove.The dependent claims of the application provides into one The improvement of step.The regulation improving makes it possible to find out the suitable of the glass for different size and thickness The combination of suction/blast pressure.The regulation improving can also make increasingly thicker glass float.

In whole design, size is most basic.Generally, for example, the deficiency of space and expense is right Useful size sets restriction.For example, in single pressure pipeline, if the size of pressure pipeline Can expand without limitation, then can obtain such as the equal constant pressure in the pumping chamber engaging.? Important size is the size of gate valve 4.This has hereinafter considered and has also established exhaust simultaneously One end of passage is led in stove the reason that be compared to publication US 8 279 077 difference the most great.

These rows in the case that ∑ A1 is to there is not glass on the steam vent 1 of air-supported table apparatus The circulation area sum of pore.

∑ A2 is the circulation area sum that the exhaust passage 2 of air-supported table apparatus is directly communicated in stove 0.

∑ A4 is the circulation area sum of the by-pass gate 11 of air-supported table apparatus.

A5 is the circulation area of the suction inlet of the air blast 5 of air-supported table apparatus.

In the device in accordance with the invention, ∑ A1 ≈ ∑ A2 ≈ ∑ A4 ≈ A5.

In in publication US 8 297 077 air-supported,

∑ A2 (US 8 297 077)=0

Let it is assumed that simultaneously in air-supported of publication US 8 297 077, a size of as follows:

∑ A1 (US 8 297 077)=∑ A1

∑ A1 (US 8 297 077)=< < ∑ A4, such as 0.125 × A5

A5 (US 8 297 077)=A5

Let us is write down: ∑ A1=A, ∑ A2=A, A5=A.

Example 1: do not have glass (degree of load 0%) on air-supported platform.

In the device in accordance with the invention, the suction side of air blast is the free hole of the 3 × A leading to stove Area.

In the equipment according to publication US 8 297 077, the suction side of air blast is lead to stove 1.125 The free hole area of × A.

Example 2: air-supported half is coated with glass (degree of load 50%).

In the device in accordance with the invention, the suction side of air blast is 2.5 × A+C × 0.5 leading to stove The free hole area of × A.

In the equipment according to publication US 8 297 077, the suction side of air blast is lead to stove 0.625 The free hole area of × ∑ A+C × 0.5 × A.

Example 3: air-supported is all coated with glass (degree of load 100%).

In the device in accordance with the invention, the suction side of air blast is the 2 × A+C × A leading to stove Free hole area.

In the equipment according to publication US 8 297 077, the suction side of air blast is lead to stove 0.125 The free hole area of × A+C × A.

In above, coefficient C defines the ratio in the free exhaust hole corresponding to the steam vent below glass Have much.Coefficient C depends on the change of the surface area the most limited of steam vent, and this change is followed following Calculating.

The surface area of the oral area in free exhaust hole is (п/4) D², wherein D is the diameter of the oral area of steam vent. Keeping a diameter of п DH being in the oral area of the steam vent below glass, wherein H is the height of airbed Degree.Exemplary height H of airbed is 0.5mm and is a diameter of 10mm of exhaust port.Cause This, if H=0.5mm, then (п/4) D²=5 п DH.That is, coefficient C is 0.2.In fact, coefficient C It is less and less, because when flowing into free exhaust hole, occurring without pressure before steam vent oral area Loss, and when flowing into the exhaust port below glass, the pressure loss occurs, because air must lead to The passage crossing restriction size marches to steam vent from pressure port.

As C=0.2, in the device in accordance with the invention, reduce according to the change of following table degree of load The free hole area (free area) leading in stove of the suction side of air blast.

Degree of load	Free area	Free area
			0%	3A	100%
50%	2.6A	87%
			100%	2.2A	73%

As C=0.2, in the equipment according to publication US 8 297 077, according to following table degree of load Change the free hole area (free area) leading in stove of the suction side reducing air blast.

Degree of load	Free area	Free area
			0%	1.125A	100%
50%	0.725A	64%
			100%	0.325A	29%

When comparing above table, it can be seen that according in the solution of the present invention, free area is obvious More than according to the free area in the equipment of publication US 8 297 077, and with the side according to the present invention Case is contrary, and free area proportional in the equipment according to publication US 8 297 077 is with degree of load Increase and reduce sharp.The freedom of the suction side of air blast 5 is depended in the air supply of air blast Hole area.The reduction of hole area causes relatively low blast pressure and exhaust passage 2 in pumping chamber 7 In higher suction pressure.In the device in accordance with the invention, compared at publication US 8 297 077 Equipment, a bearing capacity of above-mentioned pressure and airbed is significantly smallerly by the shadow of change of degree of load Ring.This considerably improves the control ability to equipment.

Can make a change in the calculating of publication US 8 297 077, make ∑ A4 (US 8 297 077)=∑ A4, the impact of the area having glass and the area ratio the not having glass air supply on air blast is still Become apparent from than the present invention.One end of exhaust passage according to the present invention lead to stove creates this Difference.The air of air blast is fed through blast pressure and exhaust passage have impact on the air of glass and props up Hold.

Can make a change in the calculating of publication US 8 297 077, make ∑ A4 (US 8 297 077)=2 × ∑ A4, this calculating will provide identical result.In this case, situation have begun to similar in appearance to Situation disclosed in publication US 4 200 446, wherein, air blast is not attached to exhaust passage.Deposit Supplying sky from by-pass gate supply air to air blast with by leading to the end of the exhaust passage in stove Gas is to the difference between air blast.When feeding to air blast by leading to the end of the exhaust passage in stove When flow velocity increases, the flow velocity in exhaust passage also increases, and thus the static pressure in exhaust passage reduces, Suction pressure i.e. at steam vent increases.When the flow velocity being fed to air blast by by-pass gate is increased, The flow velocity being fed to air blast by exhaust passage is reduced and the therefore suction pressure reduction at steam vent.

The invention is not restricted to above-described embodiment.Transfer roller 10 may also be understood to be other classes with glass contact The conveyer of type.

Claims (15)

1. at air-supported (9) of the heating furnace upper equipment transmitting glass plate, described air Supporting station includes wind pushing hole (12) and steam vent (1), and wherein, described wind pushing hole is connected to be positioned at institute Stating the pumping chamber (7) of air-supported (9) lower section, and wherein, described steam vent (1) is connected to described The exhaust passage (2) of air-supported inside, the first end of described exhaust passage lead in heating furnace (0) or Person is provided with the closing gate valve (13) can closed and can open, and wherein, the of described exhaust passage (2) Two ends lead to intake line (3) or are provided with the obstruct gate valve (11) can closed and can open, and wherein, drum The described intake line (3) of blower fan is positioned at the side contrary with conveyer (10) of described air-supported (9), Described conveyer and glass contact,

It is characterized in that, this intake line (3) between described exhaust passage (2) and described air blast (5) In be provided with the by-pass gate (4) that can regulate for air-supported at least one regulating glass.

2. equipment according to claim 1, it is characterised in that the intake line of described air blast (3) it is connected to be positioned at the described exhaust passage (2) of described air-supported (9) the same side, at drum described in this side The described intake line (3) of blower fan is connected to described pumping chamber (7).

3. equipment according to claim 1, it is characterised in that in described exhaust passage (2) Suction pressure is arranged to be regulated by beating by-pass gate described in opening/closing, and described suction pressure is Refer to the pressure reduction between the outside of described heating furnace (0) or this heating furnace and described exhaust passage (2).

4. the equipment according to claim 1 and 3, it is characterised in that at least one exhaust passage (2) pressure reduction or between steam vent (1) and described heating furnace (0) or the external environment condition of described heating furnace is arranged Become to use manometry.

5. the equipment according to claim the 1st, 3 and 4, it is characterised in that logical in described exhaust In the range of suction pressure in road (2) is disposed in 1-50 handkerchief.

6. equipment according to claim 1, it is characterised in that by being in of fully open position Or the cross-sectional area (∑ A4) in one or more holes that multiple by-pass gate (4) is opened is described air blast Suction inlet cross-sectional area (A5) at least 25%.

7. equipment according to claim 1, it is characterised in that by being in of fully open position Or the cross-sectional area (∑ A4) in one or more holes that multiple by-pass gate (4) is opened is described air blast Suction inlet cross-sectional area (A5) at least 50%.

8. equipment according to claim 1, it is characterised in that described by-pass gate (4) can be in institute State when heating furnace is closed and be adjusted from the outside of described heating furnace.

9. equipment according to claim 1, it is characterised in that by one or more described bypass The hole area that gate valve (4) is opened reduces with the rising of glass temperature.

10. equipment according to claim 1 and 2, it is characterised in that by one or more institutes State hole area reduction during furnace pressure increase that by-pass gate (4) is opened.

11. equipment according to claim 1 and 2, it is characterised in that by one or more institutes The direct of travel stating the hole area that by-pass gate (4) opens along glass reduces.

12. equipment according to claim 1, it is characterised in that by being in the one of fully open position The cross-sectional area (∑ A4) in one or more holes that individual or multiple by-pass gates (4) are opened is described air blast At least the 25% of the cross-sectional area sum of the distinctive exhaust passage of machine.

13. equipment according to claim 1, it is characterised in that by being in the one of fully open position The cross-sectional area (∑ A4) in one or more holes that individual or multiple by-pass gates (4) are opened is described air blast At least the 50% of the cross-sectional area sum of the distinctive exhaust passage of machine.

14. equipment according to claim 1, it is characterised in that flow to from described exhaust passage The air stream of described intake line (3) can block whole or in part by means of intercepting gate valve (11).

15. equipment according to claim 1, it is characterised in that flow to from described exhaust passage The air stream of described heating furnace (0) can be when described obstruct gate valve (11) is closed by means of described closing gate valve (13) block whole or in part.