CN117361863A

CN117361863A - Heating furnace with air supply device and glass tempering production line using heating furnace

Info

Publication number: CN117361863A
Application number: CN202311303836.4A
Authority: CN
Inventors: 黄亮东; 黎伟源; 周灿明; 刘华娟
Original assignee: South Guangdong Glass Technology Co Ltd
Current assignee: South Guangdong Glass Technology Co Ltd
Priority date: 2023-10-09
Filing date: 2023-10-09
Publication date: 2024-01-09

Abstract

The invention relates to glass tempering equipment, and discloses a heating furnace with an air supply device and a glass tempering production line using the same, wherein the heating furnace comprises a plurality of fans and a plurality of diversion bellows; the fan is arranged on the top surface of the heating furnace; the plurality of split bellows are in one-to-one correspondence with the plurality of groups of heating wires, and the split bellows are positioned right above the corresponding group of heating wires; the split-flow air box comprises an air inlet pipe, an air cover, a split-flow plate and an air outlet plate; the upper end of the air inlet pipe is communicated with an air outlet of the fan, and the lower end of the air inlet pipe is communicated with the top surface of the fan housing; the periphery of the air outlet plate is connected with the periphery of the bottom of the fan housing; the splitter plate is positioned between the top surface of the air outlet plate and the lower end of the air inlet pipe; the splitter plate is provided with a plurality of first through holes; the air outlet plate is provided with a plurality of second through holes. The wind entering the fan housing sequentially passes through the first through holes and the second through holes to be homogenized, and then is blown downwards above the heating wires, turbulence is formed below the heating wires, and the uniformity of temperature distribution in the furnace is improved.

Description

Heating furnace with air supply device and glass tempering production line using heating furnace

Technical Field

The invention relates to the technical field of glass tempering equipment, in particular to a heating furnace with an air supply device and a glass tempering production line using the heating furnace.

Background

The Chinese patent with the patent number of CN218058815U discloses a double-layer wind bag with uniform wind pressure distribution, a plurality of groups of heating wires are arranged in the wind bag cover, and a first wind plate and a second wind plate are arranged below the heating wires at intervals.

In practical application, the bottom surface of the second aerofoil of this patent is close to the surface of waiting toughened glass 6, and the hot-blast back of first aerofoil and second aerofoil of a plurality of second through-holes outputs has good wind pressure homogeneity, but because the inhomogeneous that generates heat of multiunit heater leads to the inhomogeneous temperature distribution around the multiunit heater, causes the hot-blast defect that has temperature distribution inhomogeneous that has of a plurality of first through-holes of first aerofoil output for the hot-blast defect that also has temperature distribution inhomogeneous that has of second aerofoil output finally causes waiting toughened glass 6's surface to appear being heated inhomogeneous phenomenon, has influenced glass toughened quality.

Disclosure of Invention

In view of the above-mentioned drawbacks, a first object of the present invention is to provide a heating furnace with an air supply device, wherein the air speed and the air pressure of the air input into a fan housing are homogenized by a splitter plate and an air outlet plate, and then the homogenized air blows the heat around the heating wire to the lower part of the heating wire and forms turbulence, thereby improving the temperature distribution uniformity of the heating furnace.

The second object of the present invention is to provide a glass tempering line using a heating furnace with an air supply device, so as to improve the quality of glass tempering.

To achieve the purpose, the invention adopts the following technical scheme:

a heating furnace with an air supply device, wherein a plurality of groups of heating wires which are arranged at intervals along the front-back direction are arranged in the heating furnace, and the heating furnace comprises a plurality of fans and a plurality of diversion bellows;

the fan is arranged on the top surface of the heating furnace; the plurality of split bellows are in one-to-one correspondence with the plurality of groups of heating wires, and the split bellows are positioned right above the corresponding group of heating wires;

the split-flow air box comprises an air inlet pipe, an air cover, a split-flow plate and an air outlet plate;

the upper end of the air inlet pipe upwards passes through the top of the heating furnace to be communicated with an air outlet of the fan, and the lower end of the air inlet pipe is communicated with the top surface of the fan housing; the periphery of the air outlet plate is connected with the periphery of the bottom of the fan housing; the air inlet pipe is arranged at the lower end of the air inlet pipe, and the air outlet plate is arranged at the upper end of the air inlet pipe;

the flow dividing plate is provided with a plurality of first through holes which are distributed at intervals and penetrate through the plate surface of the flow dividing plate; the air outlet plate is provided with a plurality of second through holes, and the second through holes are distributed at intervals and penetrate through the plate surface of the air outlet plate.

Further, the heating wire comprises a plurality of spiral parts, and the spiral parts extend along the front-back direction;

the first through holes and the second through holes are vertically staggered in one-to-one correspondence;

the second through holes are divided into a plurality of groups, the second through holes of each group are arranged at intervals along the front-back direction, and one group of the second through holes is positioned between two left-right separated spiral parts.

Further, the split bellows further comprises a plurality of first mounting tubes and a plurality of second mounting tubes;

the plurality of first mounting pipes are divided into two groups, the plurality of first mounting pipes in one group are arranged at the rear part or the front part of the split-flow bellows at intervals along the left-right direction, the upper end of each first mounting pipe penetrates through the top surface of the fan housing, and the lower end of each first mounting pipe penetrates through the split-flow plate and the air outlet plate in sequence downwards;

the first mounting pipe is used for mounting a suspender for suspending the heating wire;

the second mounting pipes are arranged in the middle of the split air box at intervals along the left-right direction, the upper ends of the second mounting pipes penetrate through the top surface of the fan housing, and the lower ends of the second mounting pipes penetrate through the split plate and the air outlet plate in sequence downwards;

the second mounting tube is used for inserting a thermocouple.

Further, the plurality of the split bellows are divided into two groups which are aligned one by one left and right, the plurality of the split bellows in one group are arranged at intervals along the front-back direction, and two opposite outer side surfaces of the two split bellows which are aligned left and right are propped against each other;

the fan is a centrifugal fan.

Preferably, the distance between the air outlet plate and the top surface of the heating wire aligned below is a distance a, the distance between the bottom surface of the heating wire and the top surface of the lower conveying roller is a distance b, and the distance a is smaller than the distance b.

Further, the outer peripheral surface of the heating wire is wrapped with a metal sleeve, the metal sleeve is positioned in a porcelain tube, and the porcelain tube is inserted into the upper heat preservation layer or the lower heat preservation layer;

a gap is reserved between the outer peripheral surface of the metal sleeve and the inner wall of the porcelain tube; the two ends of the porcelain tube respectively penetrate through the upper heat insulation layer or the lower heat insulation layer upwards; the ends of the two ends of the heating wire are sleeved with porcelain heads.

Preferably, the metal sleeve is made of austenitic chromium-nickel stainless steel.

Further, the heating furnace is divided into an upper furnace body and a lower furnace body, a plurality of driving rollers extending along the left-right direction are arranged above the lower furnace body at intervals in the front-back direction, the heat insulation layer of the heating furnace comprises a plurality of transverse heat insulation blocks, a plurality of longitudinal heat insulation blocks and a plurality of detachable heat insulation blocks, and the longitudinal heat insulation blocks are composed of a plurality of heat insulation sheets which are propped against each other from left to right;

the transverse heat-insulating blocks are divided into two groups, and the transverse heat-insulating blocks in one group are connected in a front-back propping way and cover the top surface of the inner wall of the upper furnace body or the bottom surface of the inner wall of the lower furnace body;

the plurality of longitudinal heat preservation blocks are divided into four groups; a plurality of longitudinal heat preservation blocks in a group are connected in a propping way from front to back and cover the left side surface of the inner wall of the upper furnace body or the right side surface of the inner wall of the upper furnace body and the left side surface of the inner wall of the lower furnace body or the right side surface of the inner wall of the lower furnace body;

the detachable heat preservation blocks are divided into four groups; a plurality of detachable heat-insulating blocks in one group are connected in a propping way from front to back and are embedded between the innermost longitudinal heat-insulating block and the roller surface of the driving roller; the top surface or the bottom surface of the detachable heat preservation block is propped against the bottom surface or the top surface of the innermost heat preservation sheet;

a first semicircular hole is formed in the top surface or the bottom surface of the detachable heat insulation block close to the driving roller, and the first semicircular hole penetrates through the detachable heat insulation block from left to right; a second semicircular hole is formed in the top surface or the bottom surface of the longitudinal heat insulation block close to the driving roller, and the second semicircular hole penetrates through the longitudinal heat insulation block from left to right; the first semicircular hole is aligned with and communicated with the second semicircular hole in left-right direction;

the first semicircular hole and the second semicircular hole which are communicated are used for accommodating the driving roller.

Further, the heat insulation layer of the heating furnace further comprises a plurality of lining heat insulation sheets, a first fixing sheet, a first blind rivet, a second fixing sheet and a second blind rivet;

the lining heat-insulating sheets are divided into five groups; a plurality of lining heat-insulating sheets in a group are connected in a propping way from front to back and cover the inner side surface of the heat-insulating sheet at the innermost side or the top surface of the transverse heat-insulating block positioned on the lower furnace body;

the top surface or the bottom surface of the lining heat-insulating sheet covering the inner side surface of the innermost heat-insulating sheet is propped against the bottom surface or the top surface of the detachable heat-insulating block;

the first fixing piece is positioned above the conveying roller, one end of the first blind rivet is fixed on the first fixing piece, and the other end of the first blind rivet sequentially penetrates through the detachable heat insulation block and the side wall of the upper furnace body and is fixed on the outer side surface of the upper furnace body; the first fixing piece passes through a gap between the heat insulation sheet and the detachable heat insulation block, and the first fixing piece is propped against the inner side surface of the heat insulation sheet and the inner side surface of the detachable heat insulation block;

the second fixing piece is positioned between the two conveying rollers which are opposite front and back and is positioned below the conveying rollers;

one end of the second blind rivet is fixed on the second fixing piece, and the other end of the second blind rivet sequentially penetrates through the detachable heat insulation block and the side wall of the lower furnace body and is fixed on the outer side face of the lower furnace body; the second fixing piece is propped against the inner side surface of the detachable heat insulation block;

the transverse heat preservation block, the detachable heat preservation block and the lining heat preservation sheet are all aluminum silicate ceramic fiber plates.

Furthermore, the invention provides a glass tempering production line, which uses the heating furnace with the air supply device.

According to the heating furnace with the air supply device, the air output by the fan enters the fan housing through the air inlet pipe, the air entering the fan housing sequentially passes through the first through holes and the second through holes to be homogenized, and the homogenized air is blown downwards above one group of heating wires, so that the heat around each group of heating wires is carried by the air to enter the lower part of the group of heating wires, turbulence is formed below the group of heating wires, the heat of turbulent hot air flow is homogenized below the group of heating wires, and therefore the temperature distribution uniformity in the heating furnace is improved, the heating uniformity of glass to be tempered is improved, and the quality of glass tempering is improved.

Furthermore, the glass tempering production line using the heating furnace with the air supply device provided by the invention has the advantages that the heating furnace has good temperature distribution uniformity, the heat preservation layer contains the detachable heat preservation block and the heat preservation sheet, the glass tempering quality is good, and the maintenance cost of the heat preservation layer is low.

Drawings

FIG. 1 is a schematic view of a heating furnace with an air supply device according to the present invention;

FIG. 2 is a schematic view of the split bellows of FIG. 1;

FIG. 3 is a cross-sectional view of the portion B-B of FIG. 2;

FIG. 4 is a rear view of FIG. 1;

fig. 5 is a partial enlarged view of a portion a in fig. 1;

fig. 6 is a schematic view of an installation structure of a heating wire in the heating furnace of the present invention;

FIG. 7 is a schematic view of the heating wire located below FIG. 6;

fig. 8 is a schematic view of the structure of the heat insulating layer of the heating furnace 1 of the present invention;

FIG. 9 is a schematic view of the three-dimensional structure of FIG. 8;

fig. 10 is a partial enlarged view of a portion C in fig. 8;

wherein: a heating furnace 1; a fan 2; a split bellows 3; a heating wire 4; an upper heat-insulating layer 5; glass to be tempered 6; a driving roller 7; a boom 8; a thermocouple 9; a lower insulation layer 10; a porcelain head 11; a metal sleeve 12; a porcelain tube 13; a transverse heat-insulating block 21; longitudinal insulation blocks 22; lining the thermal insulation sheet 23; a removable thermal block 24; a first blind rivet 25; a first fixing piece 26; a second fixing piece 27; a second blind rivet 28; an air inlet pipe 31; a hood 32; a flow dividing plate 33; an air outlet plate 34; a first mounting tube 35; a second mounting tube 36; a spiral section 41; an upper furnace body 101; a lower furnace body 102; a heat insulating sheet 221; a first semicircular hole 241; a first through hole 331; a second through hole 341; second semicircle orifice 2210.

Detailed Description

The technical scheme of the invention is further described below by referring to fig. 1-10 and specific embodiments.

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, so to speak, the two elements are communicated internally. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.

A heating furnace with an air supply device, wherein a plurality of groups of heating wires 4 which are arranged at intervals along the front-back direction are arranged in the heating furnace 1, and the heating furnace comprises a plurality of fans 2 and a plurality of diversion bellows 3;

the fan 2 is arranged on the top surface of the heating furnace 1; the plurality of split bellows 3 are in one-to-one correspondence with the plurality of groups of heating wires 4, and the split bellows 3 are positioned right above the corresponding group of heating wires 4;

the split-flow air box 3 comprises an air inlet pipe 31, an air cover 32, a split-flow plate 33 and an air outlet plate 34;

the upper end of the air inlet pipe 31 passes through the top of the heating furnace 1 upwards to be communicated with the air outlet of the fan 2, and the lower end of the air inlet pipe 31 is communicated with the top surface of the fan housing 32; the periphery of the air outlet plate 34 is connected with the periphery of the bottom of the fan housing 32; the splitter plate 33 is installed in the fan housing 32, the splitter plate 33 is located between the top surface of the air outlet plate 34 and the lower end of the air inlet pipe 31, and the periphery of the splitter plate 33 is connected with the inner wall of the fan housing 32;

the splitter plate 33 is provided with a plurality of first through holes 331, and the plurality of first through holes 331 are distributed at intervals and penetrate through the plate surface of the splitter plate 33; the air outlet plate 34 is provided with a plurality of second through holes 341, and the second through holes 341 are distributed at intervals and penetrate through the plate surface of the air outlet plate 34.

Fig. 1 to 3 are schematic structural views of the heating furnace with the air supply device according to the present invention. In fig. 1, a plurality of driving rollers 7 for conveying glass 6 to be tempered and arranged at intervals along the front-rear direction are arranged in a heating furnace 1, a diversion bellows 3 is positioned right above a corresponding group of heating wires 4, and the top surface of a fan housing 32 is close to the bottom surface of an upper heat insulation layer 5.

According to the heating furnace with the air supply device, the air output by the fan 2 enters the fan housing 32 through the air inlet pipe 31, the air entering the fan housing 32 sequentially passes through the first through holes 331 and the second through holes 341 to be homogenized, and the homogenized air is blown downwards above one group of heating wires 4, so that the heat around each group of heating wires 4 is carried by the air to enter the lower part of the group of heating wires 4, turbulent flow is formed below the group of heating wires 4, and the heat of hot air flow which is turbulent flow is homogenized below the group of heating wires 4, so that the temperature distribution uniformity in the heating furnace 1 is improved, the heating uniformity of glass 6 to be tempered is improved, and the glass tempering quality is improved.

Further, the heating wire 4 includes a plurality of spiral parts 41, the spiral parts 41 extending in the front-rear direction;

the first through holes 331 and the second through holes 341 are vertically staggered in a one-to-one correspondence;

the plurality of second through holes 341 are divided into a plurality of groups, the plurality of second through holes 341 of each group are arranged at intervals in the front-rear direction, and one group of second through holes 341 is located between two spiral parts 41 spaced apart from each other in the left-right direction.

As shown in fig. 3 and 5, a plurality of second through holes 341 are arranged between two spiral parts 41 spaced left and right, so that the air output by the second through holes 341 can be prevented from directly blowing on the surface of the heating wire 4, the phenomenon of uneven temperature of the heating wire 4 caused by the direct blowing is avoided, and the service life of the heating wire 4 is prevented from being shortened.

As shown in fig. 3, the first through holes 331 and the second through holes 341 are staggered vertically in a one-to-one correspondence manner, so that the phenomenon that the air output by the fan 2 passes through the aligned first through holes 331 and second through holes 341 from top to bottom in sequence and directly blows to the surface of the glass 6 to be tempered below can be avoided, the wind pressure uniformity of the guide air output by the second through holes 341 is improved, and the occurrence of wind spots on the surface of the glass 6 to be tempered is avoided.

Further, the split bellows 3 further comprises a plurality of first mounting tubes 35 and a plurality of second mounting tubes 36;

the plurality of first mounting pipes 35 are divided into two groups, the plurality of first mounting pipes 35 in one group are arranged at intervals at the rear part or the front part of the split-flow bellows 3 along the left-right direction, the upper end of the first mounting pipe 35 penetrates through the top surface of the fan housing 32, and the lower end of the first mounting pipe 35 penetrates through the split-flow plate 33 and the air outlet plate 34 in turn downwards;

the first mounting pipe 35 is used for mounting a suspension rod 8 for suspending the heating wire 4;

the plurality of second mounting pipes 36 are arranged at intervals in the middle of the split-flow bellows 3 along the left-right direction, the upper ends of the second mounting pipes 36 penetrate through the top surface of the fan housing 32, and the lower ends of the second mounting pipes 36 penetrate through the split-flow plate 33 and the air outlet plate 34 in sequence downwards;

the second mounting tube 36 is used for plugging the thermocouple 9.

As shown in fig. 1 to 3, the hanger rod 8 suspending the heating wire 4 is suspended from the top of the heating furnace 1 through the first installation tube 35. The lower end of the thermocouple 9 is extended from the top of the heating furnace 1 downward through the second installation tube 36 to below the heating wires 4 so as to detect the temperature of the lower region of the corresponding set of heating wires 4.

Further, the plurality of the split bellows 3 are divided into two groups which are aligned in a left-right one-to-one manner, the plurality of the split bellows 3 in one group are arranged at intervals along the front-back direction, and two opposite outer side surfaces of the two split bellows 3 which are aligned in the left-right manner are propped against each other;

the fan 2 is a centrifugal fan.

As shown in fig. 4, the two split bellows 3 aligned right and left are offset, so that turbulent air flow generated by gaps between the two split bellows 3 aligned right and left can be avoided, and the phenomenon that temperature distribution is uneven at the position between the two groups of heating wires 4 which are opposite right and left is avoided.

The centrifugal fan has the advantages of low airflow velocity and small change of wind pressure and pressure, and can reduce the influence of wind pressure and flow velocity on the uniformity of temperature distribution in the heating furnace 1.

Preferably, a distance between the air outlet plate 34 and the top surface of the heating wire 4 aligned downward is a distance a, a distance between the bottom surface of the heating wire 4 and the top surface of the lower conveying roller 7 is a distance b, and the distance a is smaller than the distance b.

As shown in fig. 5, the interval b is larger than the interval a, so that the hot air entering the lower part of the heating wire 4 has enough space to form turbulence and homogenization, thereby improving the uniformity of the temperature distribution in the heating furnace 1.

Further, the outer circumferential surface of the heating wire 4 is wrapped with a metal sleeve 12, the metal sleeve 12 is positioned in a porcelain tube 13, and the porcelain tube 13 is inserted into the upper heat preservation layer 5 or the lower heat preservation layer 10;

a gap is reserved between the outer peripheral surface of the metal sleeve 12 and the inner wall of the porcelain tube 13; the two ends of the porcelain tube 13 respectively penetrate through the upper heat insulation layer 5 or the lower heat insulation layer 10 upwards; the ends of the two ends of the heating wire 4 are sleeved with porcelain heads 11.

Fig. 6 is a schematic diagram of an installation structure of a heating wire in a heating furnace 1 according to the present invention, fig. 7 is a schematic diagram of a structure of a heating wire 4 located below the heating furnace 1, a middle portion of the heating wire 4 in the drawing is spiral, a porcelain tube 13 is sleeved on a periphery of the heating wire 4 near two ends and is located in an upper heat insulation layer 5 or a lower heat insulation layer 10, two ends of the porcelain tube 13 penetrate through the upper heat insulation layer 5 upwards or penetrate through the lower heat insulation layer 10 downwards, and porcelain heads 11 are sleeved on end portions of two ends of the heating wire 4.

The metal sleeve 12 wrapped on the outer peripheral surface of the heating wire 4 has a heat dissipation effect, and even if the heating wire 4 in the metal sleeve 12 breaks, the metal sleeve 12 can be conducted, so that the heating wire 4 can be prevented from breaking, the phenomenon that the heating wire 4 cannot output heat can be prevented from happening, the normal operation of the heating furnace 1 is further ensured, and the influence on the uniformity of the temperature distribution of the heating furnace 1 is reduced.

The gap between the outer peripheral surface of the metal sleeve 12 and the inner wall of the porcelain tube 13 forms a hot air flow leaking from the inside of the furnace to the outside of the furnace, which is advantageous in avoiding heat accumulating in the metal sleeve 12, thereby avoiding the excessive temperature of the metal sleeve 12.

The porcelain heads 11 are sleeved at the end parts of the two ends of the heating wire 4, so that the phenomenon of electric leakage or short circuit caused by the contact of the two ends of the electrified heating wire 4 with other objects can be avoided.

Preferably, the metal sleeve 12 is made of austenitic chromium-nickel stainless steel.

Austenitic chromium-nickel stainless steel has good high temperature resistance, and also has good oxidation resistance and corrosion resistance.

Further, the heating furnace 1 is divided into an upper furnace body 101 and a lower furnace body 102, a plurality of driving rollers 7 extending along the left-right direction are mounted above the lower furnace body 102 at intervals in front-back, the heat insulation layer of the heating furnace 1 comprises a plurality of transverse heat insulation blocks 21, a plurality of longitudinal heat insulation blocks 22 and a plurality of detachable heat insulation blocks 24, and the longitudinal heat insulation blocks 22 are composed of a plurality of heat insulation sheets 221 which are propped against each other from left to right;

the plurality of the transverse heat preservation blocks 21 are divided into two groups, and the plurality of the transverse heat preservation blocks 21 in one group are connected in a front-back propping way and cover the top surface of the inner wall of the upper furnace body 101 or the bottom surface of the inner wall of the lower furnace body 102;

the plurality of the longitudinal insulating blocks 22 are divided into four groups; a plurality of the longitudinal heat-insulating blocks 22 in a group are connected in a propping way from front to back and cover the left side surface of the inner wall of the upper furnace body 101 or the right side surface of the inner wall of the upper furnace body 101 and the left side surface of the inner wall of the lower furnace body 102 or the right side surface of the inner wall of the lower furnace body 102;

the plurality of detachable insulating blocks 24 are divided into four groups; a plurality of detachable heat-insulating blocks 24 in a group are connected in a propping way from front to back and are embedded between the innermost longitudinal heat-insulating block 22 and the roller surface of the driving roller 7; the top or bottom surface of the detachable thermal insulation block 24 is abutted against the bottom or top surface of the innermost thermal insulation sheet 221;

a first semicircular hole 241 is formed in the top surface or the bottom surface of the detachable heat insulation block 24 close to the driving roller 7, and the first semicircular hole 241 penetrates through the detachable heat insulation block 24 from left to right; a second semicircular hole 2210 is formed in the top surface or the bottom surface of the longitudinal heat insulation block 22 close to the driving roller 7, and the second semicircular hole 2210 penetrates through the longitudinal heat insulation block 22 from left to right; the first semicircular hole 241 is aligned with and communicated with the second semicircular hole 2210;

the first semicircular hole 241 and the second semicircular hole 2210 are communicated and used for accommodating the driving roller 7.

Fig. 8 to 10 are schematic views of the structure of the heat insulating layer of the heating furnace 1.

The detachable heat preservation blocks 24 are embedded above the upper roller surface and below the lower roller surface of the driving roller 7, the detachable heat preservation blocks 24 are located on the inner sides of the longitudinal heat preservation blocks 22 formed by a plurality of heat preservation sheets 221 which are abutted left and right, the glass 6 to be tempered runs on the upper roller surface of the driving roller 7, when the glass 6 to be tempered is deviated, the corners of the glass 6 to be tempered scratch the inner side surfaces of the detachable heat preservation blocks 24, and the longitudinal heat preservation blocks 22 are not damaged, so that only the damaged detachable heat preservation blocks 24 are replaced, the size of the detachable heat preservation blocks 24 which are vulnerable parts is small, the disassembly difficulty is small, and the maintenance cost is lower.

Further, the heat insulation layer of the heating furnace 1 further comprises a plurality of lining heat insulation sheets 23, a first fixing sheet 26, a first blind rivet 25, a second fixing sheet 27 and a second blind rivet 28;

the plurality of lining thermal insulation sheets 23 are divided into five groups; a plurality of the lining thermal insulation sheets 23 in a group are connected in a propping way from front to back and cover the inner side surface of the innermost thermal insulation sheet 221 or the top surface of the transverse thermal insulation block 21 positioned on the lower furnace body 102;

the top or bottom surface of the lining thermal insulation sheet 23 covering the inner side surface of the innermost thermal insulation sheet 221 abuts against the bottom or top surface of the detachable thermal insulation block 24;

the first fixing piece 26 is located above the conveying roller 2, one end of the first blind rivet 25 is fixed on the first fixing piece 26, and the other end of the first blind rivet 25 sequentially penetrates through the detachable heat insulation block 24 and the side wall of the upper furnace body 101 and is fixed on the outer side surface of the upper furnace body 101; the first fixing piece 26 passes through the gap between the heat insulation sheet 221 and the detachable heat insulation block 24, and the first fixing piece 26 is abutted against the inner side surface of the heat insulation sheet 221 and the inner side surface of the detachable heat insulation block 24;

the second fixing piece 27 is positioned between the two conveying rollers 2 which are opposite in front and back and positioned below the conveying rollers 2;

one end of the second blind rivet 28 is fixed to the second fixing piece 27, and the other end of the second blind rivet 28 sequentially penetrates through the detachable heat insulation block 24 and the side wall of the lower furnace body 102 and is fixed to the outer side surface of the lower furnace body 102; the second fixing piece 27 abuts against the inner side surface of the detachable heat insulation block 24;

the transverse heat preservation block 21, the detachable heat preservation block 24 and the lining heat preservation sheet 23 are all aluminum silicate ceramic fiber boards.

The lining heat-insulating sheet 23, the heat-insulating sheet 221 and the transverse heat-insulating block 21 are made of the same material, and the thickness of the lining heat-insulating sheet 23 is smaller than that of the heat-insulating sheet 221 or the transverse heat-insulating block 21.

As shown in fig. 8 and 9, when in-furnace maintenance and slag cleaning are performed, the heat insulating material on the inner side surface and the heat insulating material on the bottom surface of the heating furnace 1 may be damaged, for example, the inner side surface of the innermost heat insulating sheet 221 is covered with the inner lining heat insulating sheet 23 with a smaller thickness, and the top surface of the lateral heat insulating block 21 in the lower furnace body 102 is only required to replace the damaged inner lining heat insulating sheet 23, the difficulty in mounting and dismounting the inner lining heat insulating sheet 23 which is a wearing part is small, and the inner lining heat insulating sheet 23 has lower material cost than the heat insulating sheet 221 or the lateral heat insulating block 21.

As shown in fig. 8 and 10, the heat insulating sheet 221 and the detachable heat insulating block 24 above the conveying roller 2 are fixed by the first fixing piece 26 and the first blind rivet 25, so that the heat insulating sheet 221 and the detachable heat insulating block 24 are prevented from loosening when being hung on the glass 6 to be tempered, and the influence on the normal operation of the heating furnace 1 is avoided. The detachable thermal insulation block 24 positioned below the conveying roller 2 is fixed by the second fixing piece 27 and the second blind rivet 28, so that the detachable thermal insulation block 24 is prevented from loosening when the heating furnace 1 is in normal operation or loosening when slag is cleaned.

The aluminum silicate ceramic fiber board not only has good temperature resistance, but also has the advantages of flame retardance, light volume weight, sound insulation and shock resistance, and can improve the energy utilization rate of the heating furnace 1 and reduce the noise during operation.

According to the glass tempering production line using the heating furnace with the air supply device, the heating furnace 1 has good temperature distribution uniformity, the heat preservation layer comprises the detachable heat preservation block 24 and the heat preservation sheet 221, the glass tempering quality is good, and the maintenance cost of the heat preservation layer is low.

In summary, as shown in fig. 1-5, in the heating furnace with the air supply device according to the embodiment of the invention, the air output by the fan 2 enters the fan housing 32 through the air inlet pipe 31, the air entering the fan housing 32 sequentially passes through the first through holes 331 and the second through holes 341 to be homogenized, and the homogenized air is blown downward above the set of heating wires 4, so that the heat around each set of heating wires 4 is carried by the air to enter the lower part of the set of heating wires 4, turbulence is formed below the set of heating wires 4, and the heat of the turbulent hot air flow is homogenized below the set of heating wires 4, thereby improving the uniformity of temperature distribution in the heating furnace 1, and further improving the uniformity of heating of the glass 6 to be tempered, and further improving the quality of glass tempering.

Furthermore, the glass tempering production line using the heating furnace with the air supply device provided by the invention has the advantages that the heating furnace 1 has good temperature distribution uniformity, the heat preservation layer comprises the detachable heat preservation block 24 and the heat preservation sheet 221, the glass tempering quality is good, and the maintenance cost of the heat preservation layer is low.

The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.

Claims

1. The heating furnace with the air supply device is internally provided with a plurality of groups of heating wires which are arranged at intervals along the front-back direction, and is characterized by comprising a plurality of fans and a plurality of diversion bellows;

2. The heating furnace with air blowing device according to claim 1, wherein the heating wire includes a plurality of spiral portions extending in a front-rear direction;

3. The heating furnace with air blowing device according to claim 1, wherein the split-flow bellows further comprises a plurality of first mounting tubes and a plurality of second mounting tubes;

the second mounting tube is used for inserting a thermocouple.

4. The heating furnace with an air supply device according to claim 1, wherein the plurality of the split bellows are divided into two groups aligned one by one, a plurality of the split bellows in one group are arranged at intervals along the front-rear direction, and two opposite outer side surfaces of the two split bellows aligned left and right are abutted against each other;

the fan is a centrifugal fan.

5. The heating furnace with an air blowing device according to claim 1, wherein a distance between the air outlet plate and the top surface of the heating wire aligned below is a distance a, a distance between the bottom surface of the heating wire and the top surface of the lower conveying roller is a distance b, and the distance a is smaller than the distance b.

6. The heating furnace with air supply device according to any one of claims 1 to 5, wherein the outer peripheral surface of the heating wire is wrapped with a metal sleeve, the metal sleeve is positioned in a porcelain tube, and the porcelain tube is inserted into the upper heat insulation layer or the lower heat insulation layer;

7. The heating furnace with air supply device according to claim 6, wherein the metal sleeve is made of austenitic chromium-nickel stainless steel.

8. The heating furnace with the air supply device according to claim 7, wherein the heating furnace is divided into an upper furnace body and a lower furnace body, a plurality of driving rollers extending along the left-right direction are arranged above the lower furnace body at intervals in the front-back direction, and the heating furnace is characterized in that the heat insulation layer comprises a plurality of transverse heat insulation blocks, a plurality of longitudinal heat insulation blocks and a plurality of detachable heat insulation blocks, and the longitudinal heat insulation blocks are composed of a plurality of heat insulation sheets which are propped against each other from left to right;

9. The heating furnace with air supply device according to claim 8, wherein the heat insulation layer of the heating furnace further comprises a plurality of lining heat insulation sheets, a first fixing sheet, a first blind rivet, a second fixing sheet and a second blind rivet;

10. A glass tempering production line, characterized in that the heating furnace with the air supply device according to claim 9 is used.