CN115521052A - Glass tempering production line using double-chamber heating furnace - Google Patents
Glass tempering production line using double-chamber heating furnace Download PDFInfo
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- CN115521052A CN115521052A CN202211246051.3A CN202211246051A CN115521052A CN 115521052 A CN115521052 A CN 115521052A CN 202211246051 A CN202211246051 A CN 202211246051A CN 115521052 A CN115521052 A CN 115521052A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 138
- 239000011521 glass Substances 0.000 title claims abstract description 85
- 238000005496 tempering Methods 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 50
- 239000003921 oil Substances 0.000 claims description 32
- 239000010687 lubricating oil Substances 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 6
- 238000005457 optimization Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 3
- 239000006063 cullet Substances 0.000 description 3
- 239000005341 toughened glass Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/012—Tempering or quenching glass products by heat treatment, e.g. for crystallisation; Heat treatment of glass products before tempering by cooling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention relates to the technical field of glass tempering equipment, and discloses a glass tempering production line using a double-chamber heating furnace, wherein a preheating zone and a high-temperature zone which are adjacent and communicated are arranged in the double-chamber heating furnace; the heating wind bag comprises an upper wind plate and a lower wind plate; the plurality of upper vent holes are uniformly distributed on the upper air plate at intervals; the lower air plate is provided with a plurality of lower vent holes, and the lower vent holes penetrate through the lower air plate from top to bottom; the plurality of upper vent holes and the plurality of lower vent holes are distributed in a staggered manner; the heating time of the glass to be toughened in the preheating zone is the same as that of the high-temperature zone, and the double-chamber heating furnace is provided with a rapid heating mode and a slow heating mode; can meet the toughening requirements of glass with different thicknesses. Go up aerofoil and leeward aerofoil have the vortex effect to the hot-blast wind of output down, the preheating zone and the high temperature district of optimization have good wind pressure distribution uniformity, can avoid the glass through rapid heating crookedness and the bigger condition of wave degree to appear, avoid producing the obvious defect of light distortion, and then improve the quality of the glassware of output.
Description
Technical Field
The invention relates to the technical field of glass toughening equipment, in particular to a glass toughening production line using a double-chamber heating furnace.
Background
In the prior art, a heating furnace is used for heating glass in glass tempering, and in order to improve the yield of tempered glass, a plurality of heating chambers which are arranged in sequence are correspondingly arranged on the heating furnace, namely, a continuous heating furnace commonly known in the industry is formed.
The continuous heating furnace occupies a large area, the investment is high, and when the order batch size is small, the continuous operation time is short, the heat energy utilization rate is not high, so that the production cost is high.
The double-chamber heating furnace is provided with the preheating chamber and the high-temperature chamber, the occupied area is small, the use is convenient, and the double-chamber heating furnace has the advantage of large output compared with a single-chamber heating furnace, because the length of the preheating chamber is limited, the time for heating glass from the room temperature to the target temperature close to the softening temperature is short, rapid heating is needed, the rapid heating process is realized, the phenomena of bending and large waviness easily appear on the surface of the glass at the part with high wind pressure, and the defect of obvious light distortion of the prepared glass product is caused.
Disclosure of Invention
In view of the above problems, the present invention provides a glass tempering production line using a dual-chamber heating furnace, which can effectively avoid the phenomenon of too high local wind pressure during the heating process of the dual-chamber heating furnace, thereby improving the output quality of glass products.
In order to achieve the purpose, the invention adopts the following technical scheme:
a glass toughening production line using a double-chamber heating furnace comprises an upper piece platform, a double-chamber heating furnace, a flat air grid and a lower piece platform which are sequentially arranged along the running direction; a preheating zone and a high-temperature zone which are adjacent and communicated are arranged in the double-chamber heating furnace; a plurality of convection fans and heating air bags which are arranged at intervals are arranged in the preheating zone and the high-temperature zone; the heating air bag comprises an upper air plate and a lower air plate;
the upper air plate and the lower air plate are arranged at the bottom of the heating air bag at intervals up and down, and the upper air plate covers the top surface of the lower air plate; the upper air plate is provided with a plurality of upper vent holes, the upper vent holes penetrate through the upper air plate from top to bottom, and the plurality of upper vent holes are uniformly distributed on the upper air plate at intervals; the lower air plate is provided with a plurality of lower vent holes, and the lower vent holes penetrate through the lower air plate from top to bottom; the plurality of upper vent holes and the plurality of lower vent holes are distributed in a staggered manner;
the heating time of the glass to be tempered in the preheating zone is the same as that of the high-temperature zone, and the double-chamber heating furnace is provided with a rapid heating mode and a slow heating mode; in the rapid heating mode, the temperature of the preheating zone is 600-650 ℃, and the temperature of the high-temperature zone is 650-700 ℃; in the gentle heating mode, the temperature of the preheating zone is 500-600 ℃, and the temperature of the high-temperature zone is 600-700 ℃.
The technical scheme of the invention has the beneficial effects that: according to the glass tempering production line using the double-chamber heating furnace, the double-chamber heating furnace is provided with the preheating zone and the high-temperature zone, and the tempering requirements of glass with different thicknesses can be met by adjusting the heating wire power load rate, the glass heating time and the temperature ranges of the preheating zone and the high-temperature zone in the corresponding zones; and the bottom of heating bellows installs aerofoil and leeward, a plurality of ventilation holes and a plurality of ventilation holes staggered distribution down go up, make aerofoil and leeward down have the vortex effect to the hot-blast of output, thereby avoid appearing the too big phenomenon of local wind pressure, consequently, preheating zone and the high temperature zone through the optimization have good wind pressure distribution uniformity, can avoid the glass through rapid heating the crookedness and the big condition on the side of wave degree to appear, avoid producing the obvious defect of light distortion, and then improve the quality of the glassware of output.
Drawings
FIG. 1 is a schematic view showing the structure of one embodiment of a glass tempering line using a two-chamber heating furnace according to the present invention;
FIG. 2 is a schematic structural view of a heating air bag of a glass tempering line using a dual chamber heating furnace according to an embodiment of the present invention;
fig. 3 is a partially enlarged view of a portion a in fig. 2;
FIG. 4 is a schematic view showing the structure of one embodiment of the flat air grid of the glass tempering line using the dual-chamber heating furnace according to the present invention;
FIG. 5 is a top view of FIG. 4;
FIG. 6 is a schematic structural view of the flat air grid of FIG. 4 in a closed state;
FIG. 7 is a schematic view of the flat wind grid of FIG. 4 in an open state;
fig. 8 is a partially enlarged view of a portion B in fig. 6;
fig. 9 is a partially enlarged view of a portion C in fig. 6;
FIG. 10 is a piping connection diagram of the cylinder and the manual valve;
FIG. 11 is a schematic structural view of an embodiment of the refueling device of the glass tempering production line using the dual-chamber heating furnace of the present invention;
FIG. 12 is a schematic view of the mounting structure of the dispensing tube and the pneumatic oil pump in FIG. 11;
fig. 13 is a schematic view of the mounting structure of the bearing and the transfer roller in fig. 11;
fig. 14 is a partially enlarged view of a portion D in fig. 11;
fig. 15 is a partially enlarged view of a portion E in fig. 12;
FIG. 16 is a schematic structural view of an embodiment of a loading table of a glass tempering line using a dual chamber heating furnace according to the present invention;
FIG. 17 is a schematic view of the second stage of FIG. 16;
fig. 18 is a partially enlarged view of a portion F in fig. 1;
wherein: a double-chamber heating furnace 1; a flat air grid 2; a loading table 3; a sheet feeding table 4; a conveying roller 5 and an oiling device 6; a bearing 7; a positioning plate 8; a convection fan 10; a preheating zone 11; a high-temperature zone 12; a heating air bag 13; a frame 21; a wind grid assembly 22; an upper air grid lifting device 23; a lower air grid opening and closing assembly 24; a safety hook 25; a manual directional valve 26; an air tube 28; a one-way shutoff valve 29; a distribution pipe 61; a filler pipe 62; an oil delivery pipe 63; a pneumatic oil pump 64; an air feed pipe 65; a solenoid valve 66; a pneumatic duplex 67; an oil filler hole 71; a fan guard 131; an air guide hood 132; a wind-bag cover 133; a heating wire 134; a lower wind plate 135; an upper wind plate 136; a lower vent 1351; a groove 1352; an upper vent 1361; the first upper cross member 211; a first lower cross member 212; a second upper beam 213; a second lower cross member 214; a top beam 215; a perforation hole 216; an upper air grid assembly 2221; a lower air grid assembly 2222; a fan lift cylinder 231; a first drive chain 232; a stopper 233; a first drive wheel 234; a fixed seat 235; a second transmission wheel 241; a second drive chain 242; a hanging ring 2131; the right end 2211 of the upper air grid; the upper air grid left side end 2212; the right side end 2221 of the lower air grid; a lower air grid left side end 2222; a first stage 31; a second stage 32; a base 321; a transfer rack 322; a stage opening and closing device 323; a collection box 324; a baffle 326; a sprocket drive 327; a stage lift cylinder 3231; a shaft 3232; a drive motor 3271; a table drive wheel 3272; a driven wheel 3273; stage drive chain 3274.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to fig. 1 to 18.
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the present embodiments, certain elements of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood 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 otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, so to speak, as communicating between the two elements. The specific meanings of the above terms in the present invention can be understood as specific cases by those skilled in the art.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
A glass tempering production line using a double-chamber heating furnace comprises an upper piece platform 3, a double-chamber heating furnace 1, a flat air grid 2 and a lower piece platform 4 which are sequentially arranged along the running direction; a preheating zone 11 and a high temperature zone 12 which are adjacent and communicated are arranged in the double-chamber heating furnace 1; a plurality of convection fans 10 and heating air bags 13 which are arranged at intervals are arranged in the preheating zone 11 and the high-temperature zone 12; the heating wind packet 13 comprises an upper wind plate 136 and a lower wind plate 135;
the upper air plate 136 and the lower air plate 135 are arranged at the bottom of the heating air bag 13 at intervals up and down, and the upper air plate 136 covers the top surface of the lower air plate 135; the upper wind plate 136 is provided with a plurality of upper vent holes 1361, the upper vent holes 1361 penetrate through the upper wind plate 136 from top to bottom, and the plurality of upper vent holes 1361 are uniformly distributed on the upper wind plate 136 at intervals; the lower air plate 135 is provided with a plurality of lower vent holes 1351, and the lower vent holes 1351 penetrate through the lower air plate 135 from top to bottom; the plurality of upper vent holes 1361 are distributed in a staggered manner with the plurality of lower vent holes 1351;
the heating time of the glass to be tempered in the preheating zone 11 is the same as that of the high-temperature zone 12, and the double-chamber heating furnace 1 is provided with a rapid heating mode and a slow heating mode; in a rapid heating mode, the temperature of a preheating zone 11 is 600-650 ℃, and the temperature of a high-temperature zone 12 is 650-700 ℃; in the gentle heating mode, the temperature of the preheating zone 11 is 500-600 ℃, and the temperature of the high temperature zone 12 is 600-700 ℃.
In the glass tempering production line using the dual-chamber heating furnace of the present invention as shown in fig. 1-3, the preheating zone 11 and the high temperature zone 12 in the dual-chamber heating furnace 1 are respectively provided with a driving device of an independent conveying roller 5, and the corresponding glass tempering production process flow is as follows: the glass enters the preheating zone 11 from the upper piece platform 3 to be heated, when the set heating time is reached, the glass enters the high-temperature zone 12 from the preheating zone 11 to be continuously heated, meanwhile, the glass of the second furnace enters the preheating zone 11 from the upper piece platform 3 to be heated, when the glass of the high-temperature zone reaches the set heating time, the glass is discharged from the furnace and enters the flat air grid 2 to be quenched, tempered and cooled, at the moment, the glass of the second furnace enters the high-temperature zone 12 from the preheating zone 11 to be continuously heated, meanwhile, the glass of the third furnace enters the preheating zone 11 from the upper piece platform 3 to be heated, the glass of the first furnace immediately enters the lower piece platform 4 after being cooled by the flat air grid 3, and the continuous production of glass tempering can be realized through the cycle repetition. The tempering requirements of the glass with different thicknesses can be met by adjusting the heating wire power, the load factor, the glass heating time, and the temperature ranges of the preheating zone and the high-temperature zone of the corresponding zone.
As shown in fig. 2-3, the heating wind bag 13 of the present invention further includes a fan cover 131, a wind guide cover 132, a wind bag cover 133, and a plurality of sets of heating wires 134; the fan cover 131 surrounds the periphery of the corresponding convection fan 10 and is communicated with the output port of the corresponding convection fan 10; two ends of the heating wire 134 respectively penetrate upwards through the top of the wind bag cover 133 and the top of the double-chamber heating furnace 1 and are connected with an external power supply; the glass to be tempered passes through the preheating zone 11 to be gradually heated and reaches a set preheating temperature, and then enters the high-temperature zone 12 to be heated to be close to the softening temperature of the glass, so that the glass positioned in the high-temperature zone 12 quickly reaches the set target temperature, the bottom of the heating air bag 13 is provided with the upper air plate 136 and the lower air plate 135, and the plurality of upper air holes 1361 and the plurality of lower air holes 1351 are distributed in a staggered manner, so that part of air blown downwards from the outlet of the air guide fan cover 132 passes through the upper air holes 1361 and the lower air holes 1351 which are opposite to each other in a straight line and is directly blown to the surface of the glass to be tempered passing below, and the hot air output downwards by the upper air plate 136 and the lower air plate 135 has a turbulence effect, so that the phenomenon of local air pressure is avoided to be too large, therefore, the optimized preheating zone 11 and the high-temperature zone 12 have good air pressure distribution uniformity, the condition that the glass heated quickly has large degree of bending and large degree of wave can be avoided, the defect of optical distortion is avoided, and the quality of the output glass products is improved.
The glass toughening production line using the double-chamber heating furnace can realize two toughening modes: the fast heating mode and the slow heating mode correspond to the following processes:
1. a rapid heating mode: a high-yield mode is adopted; the preheating zone 11 is set to a higher temperature, and the use power of the heating wire is set to be higher, so that the glass can reach the set temperature quickly, and the difference between the average temperature of the preheating zone 11 and the average temperature of the high-temperature zone 12 is smaller in the mode. In one embodiment, the temperature of the high-temperature zone 12 is set to 650-700 ℃, the power load rate of the heating wire is 60-70%, the temperature of the preheating zone 11 is set to 600-650 ℃, the power load rate of the heating wire is 80-90%, and the glass can quickly reach the required temperature in a short time through high-power high-temperature heating of the preheating zone 11, so that the purpose of high yield is achieved; because the glass is heated in the preheating zone 11 quickly and the air pressure is large, the defects of large curvature and waviness and obvious optical distortion are easy to appear on the toughened surface of the glass, and in the gentle heating mode, the toughened glass production line using the double-chamber heating furnace has the effect of improving the distribution uniformity of the air pressure by arranging the double-layer air plate structure with the turbulence effect at the bottom of the heating air bag 13, so that the quality of the output glass product is ensured.
2. Gentle heating mode: is in a high quality mode; the preheating zone 11 is set at a relatively low temperature, and the use power of the heating wire is set to be low, so that the temperature of the glass is gradually increased to reach the set temperature in the heating process, and the average temperature of the preheating zone 11 and the average temperature of the high-temperature zone 12 in the mode have a large difference. In another embodiment, the temperature of the high temperature zone 12 is set to be 650-700 ℃, the power load factor of the heating wire is 60-70%, the temperature of the preheating zone 11 is set to be 500-600 ℃, the power load factor of the heating wire is also 60-70%, and the glass can pass through the preheating zone 11 for a long time, so that the temperature of the glass is slowly increased and reaches the required temperature, and the purpose of high quality of the output glass product is achieved.
Further, the lower wind plate 135 is provided with a plurality of grooves 1352;
the plurality of grooves 1352 which are concave downwards are parallel and extend along the length direction of the wind-bag cover 133, the plate surface where the groove bottoms of the grooves 1352 are located is a plane, and the lower vent holes 1351 are only distributed on the plate surface where the groove bottoms of the grooves 1352 are located.
As shown in fig. 5 and 6, in the glass tempering production line using the dual-chamber heating furnace according to the present invention, the lower vent holes 1351 are disposed on the surface of the groove 1352 where the groove bottom is located, and the lower vent holes 1351 are raised upward and are not disposed on the surface of the lower air plate 135 close to the upper air plate 136, so that the raised surface of the lower air plate 135 has a secondary turbulent flow effect on the air flow, and the air pressure uniformity of the downwardly output hot air can be further optimized.
Specifically, the flat air grid 2 comprises a frame 21, an air grid assembly 22, an upper air grid lifting device 23 and a lower air grid opening and closing assembly 24, wherein the air grid assembly 22 comprises an upper air grid assembly 2221 and a lower air grid assembly 2222;
the upper air grid assembly 2221 is provided with an upper air grid right side end 2211 and an upper air grid left side end 2212, the lower air grid assembly 2222 is provided with a lower air grid right side end 2221 and a lower air grid left side end 2222, the upper air grid right side end 2211 and the lower air grid right side end 2221 are both cold air input ends, and the upper air grid left side end 2212 and the lower air grid left side end 2222 are both closed ends;
the machine frame 21 comprises a first upper cross beam 211, a second upper cross beam 213, a first lower cross beam 212, a second lower cross beam 214 and a top beam 215; the first upper cross beam 211, the second upper cross beam 213, the first lower cross beam 212 and the second lower cross beam 214 all extend along the running direction, and the top beam 215 is erected on the top of the rack 21 from left to right;
the upper air grid lifting device 23 comprises a fan lifting cylinder 231, a first transmission chain 232 and a first transmission wheel 234; the lower air grid opening and closing assembly 24 comprises a second transmission wheel 241 and a second transmission chain 242; the right end 2211 of the upper air grid and the left end 2212 of the upper air grid are respectively suspended at the bottom of the first upper cross beam 211 and the bottom of the second upper cross beam 213, and the first upper cross beam 211 is upwards hinged with the top of the rack 21; the lower air grid right side end 2221 and the lower air grid left side end 2222 are respectively erected on the top of the first lower cross beam 212 and the top of the second lower cross beam 214, and the first lower cross beam 212 is hinged with the bottom of the frame 21 downwards;
the first driving wheel 234 and the fan lifting cylinder 231 are mounted on the top surface of the top beam 215 at intervals, the output end of the fan lifting cylinder 231 is located at the left end of the fan lifting cylinder 231, the upper end of the first driving chain 232 bypasses the first driving wheel 234 and is connected with the output end of the fan lifting cylinder 231, and the lower end of the first driving chain 232 is connected with the top of the second upper cross beam 213; the second driving wheel 241 is mounted on the left side of the top of the frame 21, one end of the second driving chain 242 bypasses the second driving wheel 241 and is connected with the top of the left end 2212 of the upper air grid, and the other end of the second driving chain 242 is connected with the top of the second lower cross beam 214.
As shown in fig. 4-9, the fan lifting cylinder 231 is drivingly connected to the top of the upper air grid left end 2212 through the first transmission chain 232 and the first transmission wheel 234, when the slide rod of the fan lifting cylinder 231 retracts inward, the lower end of the first transmission chain 232 is pulled to rise, the top of the upper air grid left end 2212 rises upward, the upper air grid right end 2211 is driven to rotate along the hinged first upper cross beam 211, and at the same time, one end of the second transmission chain 242 rises upward along the top of the upper air grid left end 2212, and the other end of the second transmission chain 242 falls downward through the driving cooperation of the second transmission chain 242 and the second transmission wheel 241, so that the lower air grid left end 2222 lowers downward and drives the lower air grid right end 2221 to rotate along the hinged first lower cross beam 212, so that the left side of the air grid 2 is in an open state, as shown in fig. 7; on the contrary, when the slide rod of the fan lifting cylinder 231 retracts inwards, the slide rod of the fan lifting cylinder 231 pushes the lower end of the first transmission chain 232 to descend and drive the top of the left end 2212 of the upper wind grid to move downwards, and then the lower wind grid opening and closing assembly 24 drives the left end 2222 of the lower wind grid to move upwards, so that the left side of the flat wind grid 2 returns to the closed state, as shown in fig. 6; therefore, the telescopic length of the sliding rod of the fan lifting cylinder 231 is controlled, the size of the opening and closing gap on the left side of the flat air grid 2 can be effectively controlled through the hinged structures of the first upper cross beam 211, the second upper cross beam 213, the first lower cross beam 212 and the second lower cross beam 214 and the matching of the upper air grid lifting device 23 and the lower air grid opening and closing assembly 24, the body of an operator can be conveniently extended into the flat air grid 2 to clean the cullet, and the work of cleaning the cullet inside the flat air grid 2 has better operation convenience and work efficiency.
Further, the flat air grid 2 further comprises a manual reversing valve 26 and an air pipe 28, the manual reversing valve 6 is a three-position four-way manual reversing valve, and a left upright post of the rack 21 is further provided with a through hole 216;
the manual reversing valve 26 is mounted on a left upright post of the rack 21, and an air inlet of the manual reversing valve 26 is communicated with an air source;
the two working ports of the manual directional valve 26 are respectively communicated with the rod chamber and the rodless chamber of the fan lifting cylinder 231 through the two air pipes 28 so as to control the movement of the sliding rod of the fan lifting cylinder 231;
the through hole 216 is close to the upper part of the manual directional valve 26, and one end of each of the two air pipes 28 respectively passes through the through hole 216 and is communicated with the rod cavity and the rodless cavity of the fan lifting cylinder 231.
As shown in fig. 6 and 7, the manual directional valve 26 is rotated to change the direction of the air path, so that the rod chamber and the rodless chamber alternately perform air intake and exhaust to control the moving direction and the moving stroke of the sliding rod of the fan lifting cylinder 231, thereby effectively controlling the left side of the flat air grid to open and close, and having convenient operation and lower cost.
The pipe through hole 216 for the air pipe 28 is arranged above the manual reversing valve 26, so that the air pipe 28 exposed during operation can be prevented from being collided, and the situation that the air pipe 28 is loosened after being collided to influence the operation of the fan lifting cylinder 231 can be avoided.
Further, the flat air grid 2 further comprises a one-way stop valve 29 and a safety hook 25, and a hanging ring 2131 is arranged on the left side surface of the second upper cross beam 213;
the two stop valves 9 are respectively installed on the two communication pipelines of the air pipe 28 and the air inlet and the air outlet of the fan lifting cylinder 231;
the top end of the safety hook 25 is rotatably fixed at the top of the left side of the frame 21, and the bottom end of the safety hook 25 is provided with a hanging hole matched with the hanging ring 2131;
when the fan lifting cylinder 231 pulls the first transmission chain 232 to move upwards and the left end 2212 of the upper air grid rises to a high position, the hanging ring 2131 is inserted into the hanging hole at the bottom end of the safety hook 25 through a pin and fixed to the bottom end of the safety hook 25.
As shown in fig. 10, which is a pipeline connection diagram of the manual directional valve 26 and the fan lifting cylinder 231, the stop valve 9 controls that compressed air input or exhausted by the fan lifting cylinder 231 cannot reversely pass through, so that the situation that the pressure of the fan lifting cylinder 231 is relieved during a cleaning operation can be avoided, and an accident caused by the phenomenon that the open flat air grid 2 is out of control and folded can be avoided.
As shown in fig. 7, when the left side of the flat air grid 2 is in an open state, the hanging ring 2131 is fixed at the bottom end of the safety hook 25 through the pin bolt, so that the phenomenon that the open-state flat air grid 2 is closed out of control can be avoided, and the physical safety of operators for cleaning cullet is ensured.
Further, the upper air grid lifting device 23 further comprises a limiting block 233 and a fixed seat 235;
the fixed seat 235 is arranged in the middle of the top beam 215, and a limit hole is formed in the top of the fixed seat 235;
the limit block 233 is fixed in the middle of the first transmission chain 232, the first transmission chain 232 passes through the limit hole of the fixing seat 235, and the limit block 233 is located between the limit hole of the fixing seat 235 and the fan lifting cylinder 231;
the sliding rod of the fan lifting cylinder 231 extends to the left, and the limiting block 233 moves to the left along with the first transmission chain 232 until abutting against the edge of the limiting hole of the fixing seat 235, so as to limit the first transmission chain 232 to move continuously to the left and downwards.
As shown in fig. 6 to 8, the limit block 233 may limit the leftward and downward movement strokes of the first transmission chain 232, so as to limit a lower limit of the descending of the left side end 2212 of the upper air grid when the upper air grid is closed, avoid the situation that the left side end 2212 of the upper air grid descends to an excessively low position and collides with a lower transmission roller, and ensure that the bottom air outlet of the upper air grid assembly 2221 and the top air outlet of the lower air grid assembly 2222 are located at a set horizontal plane, respectively, so as to ensure the quality of glass tempering.
Further, along the running direction, a plurality of conveying rollers 5 are arranged at intervals in the middle of the double-chamber heating furnace 1, two ends of each conveying roller 5 are respectively exposed out of the left side and the right side of the double-chamber heating furnace 1, positioning plates 8 are respectively arranged on the left side and the right side of the double-chamber heating furnace 1, bearings 7 are respectively sleeved at two ends of each conveying roller 5, the bearings 7 are mounted at the tops of the positioning plates 8 in a frame mode, and an oiling device 6 is mounted above the bearings 7 in a frame mode;
the oiling device 6 comprises a distribution pipe 61, an oil conveying pipe 63, a pneumatic oil pump 64 and a plurality of oiling pipes 62;
the top of the bearing 7 is provided with an oil filling hole 71; the distributing pipe 61 extends along the running direction and is erected above a plurality of bearings 7 which are arranged at intervals, the upper end and the lower end of the oil filling pipe 62 are respectively communicated with the output port of the distributing pipe 61 and the corresponding oil filling hole 71, the input port of the distributing pipe 61 is communicated with the output end of the pneumatic oil pump 64 through the oil conveying pipe 63, and the input end of the pneumatic oil pump 64 is connected to the lubricating oil storage tank.
As shown in fig. 11 to 15, the oil filling device 6 starts the pneumatic oil pump 64, the output end of the pneumatic oil pump 64 outputs the lubricating oil, the lubricating oil passes through the oil delivery pipe 63, the distribution pipe 61 and the plurality of oil filling pipes 62 in sequence and is filled into the oil filling holes 71 at the tops of the plurality of bearings 7, the operation is simple, the lubricating oil of the bearings 7 can be timely supplemented, the abrasion of the conveying roller due to the lack of the lubricating oil is avoided, and the operation time for supplementing the lubricating oil can be saved.
Further, the refueling device 6 further comprises an air supply pipe 65, a solenoid valve 66 and a pneumatic duplex piece 67;
two ends of the air supply pipe 65 are respectively communicated with the output end of a compressed air tank and the air source input port of the pneumatic oil pump 64;
the electromagnetic valve 66 is arranged on the air supply pipe 65 and is positioned between the output end of the compressed air tank and the air source input port of the pneumatic oil pump 64;
the pneumatic coupler 67 is installed at the air feed pipe 65 between the output end of the compressed air tank and the solenoid valve 66.
As shown in fig. 12, the amount of lubricating oil added can be effectively controlled by controlling the opening and flow rate of the compressed air fed to the pneumatic oil pump 64 by the solenoid valve 66.
The pneumatic dual-connection piece 45 can effectively filter moisture in the compressed air, prevent the moisture in the compressed air from being mixed into lubricating oil, stabilize the air pressure of the compressed air and reduce damage to the electromagnetic valve 66 caused by sudden change of the air pressure.
Specifically, the upper piece table 3 and the lower piece table 4 both comprise a first piece table 31 and a second piece table 32 which are adjacent to each other in a front-back manner, and one end of the first piece table 31 is close to a furnace door at the input end or the output end of the double-chamber heating furnace 1;
the second piece table 32 is provided with a base 321, a conveying frame 322, a piece table opening and closing device 323 and a collecting box 324;
the conveying frame 322 is mounted above the base 321, the collecting box 324 is located in the base 321, the top of the collecting box 324 is open, and the open is close to the bottom of the conveying frame 322;
the slide opening and closing device 323 comprises a rotating shaft 3232 and a slide lifting cylinder 3231;
the rotating shaft 3232 extends along a direction perpendicular to the running direction, the rotating shaft 3232 is in rotating fit with the bottom of one end of the conveying frame 322 far away from the double-chamber heating furnace 1, and the other end of the conveying frame 322 is a free end and is close to the first sheet table 31; the bottom end of the piece platform lifting cylinder 3231 is installed on the base 321, and the top end of the piece platform lifting cylinder 3231 is in transmission connection with the bottom of the other end of the conveying frame 322.
As shown in fig. 16-18, when an emergency furnace-discharging is required, the glass sheets discharged from the dual chamber heating furnace 1 can pass through the first sheet table 31 and be collected in the collection box 324 by only starting the sheet table lifting cylinder 3231 and lifting the other end of the conveying frame 322 upwards through the cooperation of the rotating shaft 3232 and the sheet table lifting cylinder 3231, which is not only convenient to operate, but also can avoid the discharged glass sheets from impacting and damaging the glass positioned on the second sheet table 32 and the glass positioned on the conveying line behind the second sheet table 32, and can effectively reduce the loss of the glass materials during the emergency furnace-discharging.
Further, the second stage 32 is further provided with a baffle 326 and a sprocket drive 327;
the baffle 326 extends along a direction perpendicular to the running direction and is installed on one side of the rotating shaft 3232 close to the double-chamber heating furnace 1, and the end surface of the baffle 326 facing the double-chamber heating furnace 1 is an inclined surface inclined downwards;
the chain wheel transmission device 327 comprises a driving motor 3271, a piece table transmission chain 3274, a plurality of piece table transmission wheels 3272 and a plurality of driven wheels 3273;
the sheet table driving wheels 3272 and the driven wheels 3273 extend along a direction perpendicular to the running direction, a plurality of sheet table driving wheels 3272 are arranged at intervals and are mounted at the bottom of the conveying frame 2, a plurality of driven wheels 3273 are arranged at intervals and are mounted at the top surface of the conveying frame 2, and the driving motor 3271, the plurality of sheet table driving wheels 3272 and the plurality of driven wheels 3273 are respectively in transmission fit with the sheet table transmission chain 3274;
the driving motor 3271 is installed at one end of the bottom of the base 321 far away from the double-chamber heating furnace 1; two of the stage driving wheels 3272 are close to one end of the conveying frame 322 and above the driving motor 3271; the rotating shaft 3232 is arranged between the two stage driving wheels 3272 near one end of the conveying frame 322.
As shown in fig. 16 and 18, when the tempered glass is a large-area sheet, the dimension of the front-back direction of the glass sheet is larger than the dimension of the front-back direction of the first sheet table 31, one end of the glass sheet discharged from the two-chamber heating furnace 1 extends below the conveyance rack 322 along the conveyance plane parallel to the first sheet table 31, and the one end of the glass sheet falls down after hitting the end face of the baffle 326 which is a slope, so that the rotating shaft 3232 and the bottom of the conveyance rack 322 can be protected from being hit and damaged by the glass sheet.
As shown in fig. 2 and 3, a sprocket assembly 327 is provided for conveying glass sheets, and a rotating shaft 3232 is disposed between two stage driving wheels 3272 near the rear end of the conveying frame 322, so as to prevent the stage driving chain 3274 from loosening or deviating when the other end of the conveying frame 322 is lifted, and prevent the stage driving chain 3274 from being used normally in a later stage.
In summary, as shown in the embodiments of the present invention shown in fig. 1 to 18, in the glass tempering production line using the dual-chamber heating furnace, the dual-chamber heating furnace 1 is provided with the preheating zone 11 and the high-temperature zone 12, and by adjusting the heating wire power load rate, the glass heating time, and the temperature ranges of the preheating zone and the high-temperature zone in the corresponding regions, the tempering requirements of the glass with different thicknesses can be satisfied; and the bottom of heating bellows 13 installs windward plate 136 and leeward plate 135, a plurality of windward holes 1361 and a plurality of leeward holes 1351 dislocation distribution, make windward plate 136 and leeward plate 135 have the vortex effect to the hot-blast of output downwards, thereby avoid appearing the too big phenomenon of local wind pressure, consequently, preheating zone 11 and high temperature zone 12 through optimizing have good wind pressure distribution uniformity, can avoid the glass through rapid heating the circumstances that crookedness and waviness are great partially to appear, avoid producing the obvious defect of light distortion, and then improve the quality of the glassware of output.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.
Claims (10)
1. A glass toughening production line using a double-chamber heating furnace comprises an upper sheet table, a double-chamber heating furnace, a flat air grid and a lower sheet table which are sequentially arranged along the running direction; a preheating zone and a high-temperature zone which are adjacent and communicated are arranged in the double-chamber heating furnace; a plurality of convection fans and heating air bags which are arranged at intervals are arranged in the preheating zone and the high-temperature zone; the heating air bag is characterized by comprising an upper air plate and a lower air plate;
the upper air plate and the lower air plate are arranged at the bottom of the heating air bag at intervals up and down, and the upper air plate covers the top surface of the lower air plate; the upper air plate is provided with a plurality of upper vent holes, the upper vent holes penetrate through the upper air plate from top to bottom, and the plurality of upper vent holes are uniformly distributed on the upper air plate at intervals; the lower air plate is provided with a plurality of lower vent holes, and the lower vent holes penetrate through the lower air plate from top to bottom; the plurality of upper vent holes and the plurality of lower vent holes are distributed in a staggered manner;
the heating time of the glass to be tempered in the preheating zone is the same as that of the high-temperature zone, and the double-chamber heating furnace is provided with a rapid heating mode and a slow heating mode; in the rapid heating mode, the temperature of the preheating zone is 600-650 ℃, and the temperature of the high-temperature zone is 650-700 ℃; in the gentle heating mode, the temperature of the preheating zone is 500-600 ℃, and the temperature of the high-temperature zone is 600-700 ℃.
2. The glass tempering production line using the dual-chamber heating furnace according to claim 1, wherein said lower air plate is provided with a plurality of grooves;
many of undercut the recess is parallel and follow the length direction of wind cover extends, the face that the tank bottom of recess is located is the plane, the ventilation hole distributes only in the face that the tank bottom of recess is located down.
3. The glass tempering production line using the double-chamber heating furnace according to claim 1, wherein said flat air grid comprises a frame, an air grid assembly, an upper air grid lifting device and a lower air grid opening and closing assembly, the air grid assembly comprises an upper air grid assembly and a lower air grid assembly;
the upper air grid assembly is provided with an upper air grid right side end and an upper air grid left side end, the lower air grid assembly is provided with a lower air grid right side end and a lower air grid left side end, the upper air grid right side end and the lower air grid right side end are both cold air input ends, and the upper air grid left side end and the lower air grid left side end are both closed ends;
the rack comprises a first upper cross beam, a second upper cross beam, a first lower cross beam, a second lower cross beam and a top beam; the first upper cross beam, the second upper cross beam, the first lower cross beam and the second lower cross beam extend along the running direction, and the top beam is erected on the top of the rack from left to right;
the upper air grid lifting device comprises a fan lifting cylinder, a first transmission chain and a first transmission wheel; the lower air grid opening and closing assembly comprises a second transmission wheel and a second transmission chain; the right side end of the upper air grid and the left side end of the upper air grid are respectively suspended at the bottom of the first upper cross beam and the bottom of the second upper cross beam, and the first upper cross beam is upwards hinged with the top of the rack; the right side end of the lower air grid and the left side end of the lower air grid are respectively erected on the top of the first lower cross beam and the top of the second lower cross beam, and the first lower cross beam is downwards hinged with the bottom of the rack;
the first transmission wheel and the fan lifting cylinder are erected on the top surface of the top beam at a left-right interval, the output end of the fan lifting cylinder is located at the left end of the fan lifting cylinder, the upper end of the first transmission chain bypasses the first transmission wheel to be connected with the output end of the fan lifting cylinder, and the lower end of the first transmission chain is connected with the top of the second upper cross beam; the second transmission wheel is arranged on the left side of the top of the rack, one end of the second transmission chain bypasses the second transmission wheel and is connected with the top of the left end of the upper air grid, and the other end of the second transmission chain is connected with the top of the second lower cross beam.
4. The glass tempering production line using the double-chamber heating furnace according to claim 3, wherein said flat air grid further comprises a manual reversing valve and an air pipe, said manual reversing valve is a three-position four-way manual reversing valve, and a left side column of said frame is further provided with a pipe passing hole;
the manual reversing valve is arranged on a left upright post of the rack, and an air inlet of the manual reversing valve is communicated with an air source;
two working ports of the manual reversing valve are respectively communicated with a rod cavity and a rodless cavity of the fan lifting cylinder through two air pipes so as to control a sliding rod of the fan lifting cylinder to move;
the perforated pipe hole is close to the upper part of the manual reversing valve, and one end of each of the two air pipes penetrates through the perforated pipe hole to be communicated with the rod cavity and the rodless cavity of the fan lifting cylinder respectively.
5. The glass tempering production line using the double-chamber heating furnace according to claim 4, wherein said flat air grid further comprises a one-way stop valve and a safety hook, and a hanging ring is provided on the left side surface of said second upper beam;
the two stop valves are respectively arranged on the two air pipes and a communication pipeline of an air inlet and an air outlet of the fan lifting cylinder;
the top end of the safety hook is rotatably fixed at the top of the left side of the rack, and the bottom end of the safety hook is provided with a hanging hole matched with the hanging ring;
when the fan lifting cylinder pulls the first transmission chain to move upwards and the left side end of the upper air grid rises to a high position, the first transmission chain is inserted into the hanging hole at the bottom end of the safety hook through a pin bolt and the hanging ring is fixed at the bottom end of the safety hook.
6. The glass tempering production line using the double-chamber heating furnace according to claim 3, wherein said upper grid lifting device further comprises a limiting block and a fixing seat;
the fixed seat is arranged in the middle of the top beam, and the top of the fixed seat is provided with a limiting hole;
the limiting block is fixed in the middle of the first transmission chain, the first transmission chain penetrates through the limiting hole of the fixing seat, and the limiting block is positioned between the limiting hole of the fixing seat and the fan lifting cylinder;
the sliding rod of the fan lifting cylinder extends leftwards, and the limiting block moves leftwards along with the first transmission chain until the limiting block abuts against the edge of the limiting hole of the fixing seat, so that the first transmission chain is limited to continue moving leftwards and downwards.
7. The glass tempering production line using the double-chamber heating furnace according to claim 1, wherein a plurality of conveying rollers are arranged at intervals in the middle of the double-chamber heating furnace along the running direction, both ends of the conveying rollers are respectively exposed at the left side and the right side of the double-chamber heating furnace, positioning plates are respectively installed at the left side and the right side of the double-chamber heating furnace, bearings are respectively sleeved at both ends of the conveying rollers, the bearings are installed at the tops of the positioning plates, and an oiling device is installed above the bearings;
the refueling device comprises a distribution pipe, an oil conveying pipe, a pneumatic oil pump and a plurality of oil filling pipes;
the top of the bearing is provided with an oil filling hole; the distributing pipe extends along the running direction and is erected above a plurality of bearings which are arranged at intervals, the upper end and the lower end of the oil filling pipe are respectively communicated with the output port of the distributing pipe and the corresponding oil filling hole, the input port of the distributing pipe is communicated with the output end of the pneumatic oil pump through the oil conveying pipe, and the input end of the pneumatic oil pump is connected to the lubricating oil storage tank.
8. The glass tempering production line using a dual chamber heating furnace according to claim 7, wherein said refueling unit further comprises a gas feed pipe, a solenoid valve and a pneumatic two-link;
two ends of the air supply pipe are respectively communicated with the output end of the compressed air tank and the air source input port of the pneumatic oil pump;
the electromagnetic valve is arranged on the air supply pipe and is positioned between the output end of the compressed air tank and the air source input port of the pneumatic oil pump;
the pneumatic dual-part piece is arranged on the air supply pipe and is positioned between the output end of the compressed air tank and the electromagnetic valve.
9. The glass tempering production line using the double-chamber heating furnace according to claim 1, wherein said upper and lower stages each comprise a first stage and a second stage adjacent to each other in front and rear, one end of said first stage being close to the door of the input end or the output end of said double-chamber heating furnace;
the second film stage is provided with a base, a conveying frame, a film stage opening and closing device and a collecting box;
the conveying frame is arranged above the base, the collecting box is positioned in the base, the top of the collecting box is an opening, and the opening is close to the bottom of the conveying frame;
the film stage opening and closing device comprises a rotating shaft and a film stage lifting cylinder;
the rotating shaft extends along a direction vertical to the running direction, the rotating shaft is in rotating fit with the bottom of one end, far away from the double-chamber heating furnace, of the conveying frame, and the other end of the conveying frame is a free end and is close to the first sheet table; the bottom end of the piece platform lifting cylinder is installed on the base, and the top end of the piece platform lifting cylinder is in transmission connection with the bottom of the other end of the conveying frame.
10. The glass tempering production line using the dual-chamber heating furnace according to claim 9, wherein said second sheet table is further provided with a baffle and a sprocket transmission device;
the baffle extends along the direction vertical to the running direction and is arranged on one side of the rotating shaft close to the double-chamber heating furnace, and the end face of the baffle, facing the double-chamber heating furnace, is an inclined plane which inclines downwards;
the chain wheel transmission device comprises a driving motor, a piece table transmission chain, a plurality of piece table transmission wheels and a plurality of driven wheels;
the sheet table driving wheels and the driven wheels extend in the direction perpendicular to the running direction, the plurality of sheet table driving wheels are arranged at intervals and are erected at the bottom of the conveying frame, the plurality of driven wheels are arranged at intervals and are erected at the top surface of the conveying frame, and the driving motor, the plurality of sheet table driving wheels and the plurality of driven wheels are respectively matched with the sheet table driving chain in a transmission manner;
the driving motor is arranged at one end of the bottom of the base, which is far away from the double-chamber heating furnace; the two sheet table driving wheels are close to one end of the conveying frame and are positioned above the driving motor; the rotating shaft is arranged between the two sheet table driving wheels close to one end of the conveying frame.
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| CN202211246051.3A CN115521052B (en) | 2022-10-12 | 2022-10-12 | Glass tempering production line using double-chamber heating furnace |
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| CN202211246051.3A CN115521052B (en) | 2022-10-12 | 2022-10-12 | Glass tempering production line using double-chamber heating furnace |
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| CN115521052B (en) | 2024-03-19 |
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