CN115974377A - Auxiliary electric heating structure for online float-normal tin bath and manufacturing method thereof - Google Patents
Auxiliary electric heating structure for online float-normal tin bath and manufacturing method thereof Download PDFInfo
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- CN115974377A CN115974377A CN202211710503.9A CN202211710503A CN115974377A CN 115974377 A CN115974377 A CN 115974377A CN 202211710503 A CN202211710503 A CN 202211710503A CN 115974377 A CN115974377 A CN 115974377A
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 238000005485 electric heating Methods 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 83
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 20
- 239000006060 molten glass Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical group [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 26
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 26
- 230000006641 stabilisation Effects 0.000 claims description 20
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- 239000002994 raw material Substances 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 6
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- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 abstract description 37
- 239000005329 float glass Substances 0.000 abstract description 7
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 238000004321 preservation Methods 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 5
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
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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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- Resistance Heating (AREA)
Abstract
The invention discloses an online auxiliary electric heating structure for a float normal tin bath and a manufacturing method thereof, wherein the online auxiliary electric heating structure for the float normal tin bath comprises a heating element, a heating element and a control unit, wherein the heating element is used for heating molten glass in the tin bath; the support connecting mechanism comprises a thermal stabilizing element and a connecting main body, wherein one end of the thermal stabilizing element is connected with the connecting main body, and the other end of the thermal stabilizing element is sleeved on and connected to the heating element in a sliding manner; and the driving mechanism is connected with the connecting body and can drive the connecting body to move relative to the molten glass. The auxiliary electric heating structure for the float-normal tin bath on line disclosed by the invention moves the heating element through the driving mechanism and controls the heating of the glass plate in the fixed area at a fixed point, thereby effectively controlling the temperature field in the float glass production.
Description
Technical Field
The application relates to the technical field of float glass manufacturing, in particular to an online auxiliary electric heating structure for a float line tin bath and a manufacturing method thereof.
Background
In the float glass production, a tin bath is one of three thermal equipment, and the quality of the tin bath seriously affects the quality of glass products. The working principle of the tin bath is that molten glass flowing into the tin bath from the channel is uniformly flattened on molten metal tin bath, under the protection of protective gas, the molten glass is controlled in a required thickness range by matching with the use of an electric heating and edge-drawing machine, and meanwhile, the uniform and smooth flattening of the glass is ensured. The use of electrical heating plays a crucial role in this process.
The tin groove area generally adopts a top-inserted type heating element electric heating form, and is controlled in longitudinal and transverse directions in a partition mode, so that the temperature viscosity of glass liquid in different areas is controlled, the thinning and extension of a glass plate are controlled, particularly, the electronic ultrathin production field is realized, the thickness and thickness of glass are different, the requirement on the waviness diopter is higher, the requirements on the transverse and longitudinal temperature fields of a forming area are higher, the unreasonable temperature distribution easily causes the waviness and the diopter to be bad or even exceed the standard, and the surface quality and the optical performance of the glass are influenced.
In addition, in the production field of Gao Lvdian sub-glass, especially dual-strength (lithium aluminum silicon glass) electronic glass, in order to meet the requirement of ultra-thin forming, the electric heating usage is more, especially for an important forming area, the maximum electric heating opening can reach more than 80%, and the conditions of energy attenuation of a heating element or breakage of the heating element and the like are easily caused by higher surface temperature and opening, so that the drawing process and the apparent optical performance of a glass plate are seriously influenced, the thickness exceeds the standard, and the waviness diopter exceeds the standard.
In the production of float glass, the problems of temperature process control and the like and the problem of heating capacity attenuation are solved without very effective treatment means, and in most cases, cold repair and modification are adopted for treatment, so that the time consumption is long, the investment is large, and the economic production is not facilitated.
Therefore, how to control the temperature field in the float glass production is a problem to be solved.
Disclosure of Invention
Object of the application
Based on this, in order to solve the problem that the temperature field can not be effectively controlled in the float glass production, the following technical scheme is disclosed in the application.
(II) technical scheme
The application discloses online supplementary electrical heating structure of using of float normal tin bath includes:
the heating element is used for heating the molten glass in the tin bath;
the support connecting mechanism comprises a thermal stabilizing element and a connecting main body, wherein one end of the thermal stabilizing element is connected with the connecting main body, and the other end of the thermal stabilizing element is sleeved on and connected to the heating element in a sliding manner;
and the driving mechanism is connected with the connecting main body and can drive the connecting main body to move relative to the molten glass.
Furthermore, the thermal stabilization element comprises a hollow shell and a fixing groove arranged at one end of the hollow shell, and a through hole capable of fixing the heating element is formed in one end, far away from the hollow shell, of the fixing groove.
Furthermore, an insulating tube is arranged in the through hole, and the heating element is fixed in the insulating tube.
Furthermore, the fixed groove is also provided with a cooling air pipe.
Furthermore, the connecting main body comprises a cooling device, and the cooling device penetrates through the fixing groove and then extends into the hollow shell to cool the heating element in the hollow shell.
Further, cooling device includes parallel arrangement's inlet tube, outlet pipe and the cooling tube of parcel inlet tube and outlet pipe, the one end of inlet tube and the one end intercommunication of outlet pipe.
Furthermore, the part of the cooling pipe extending into the fixing groove and/or the hollow shell is wrapped with a buffer material.
Further, the hollow shell comprises the following components in parts by weight: al (Al) 2 O 3 60-68 parts of SiO 2 30-36 parts of Fe 2 O 3 Content is less than or equal to 0.7 part, na 2 The content of O is less than or equal to 0.3 part.
Further, the heating element comprises a conductive part, and a heating part and a terminal which are respectively arranged at two ends of the conductive part.
Furthermore, the heating element is a U-shaped silicon carbide rod, the end parts of two side arms of the U-shaped silicon carbide rod are terminals, one side of each side arm close to the corresponding terminal is provided with a conductive part, and the rest part is a heating part.
Furthermore, the silicon carbide rod is a U-shaped silicon carbide rod, the end parts of two side arms of the U-shaped silicon carbide rod are wiring ends, the two side arms are respectively provided with a conductive part adjacently, the annular end of the U-shaped silicon carbide rod is a heating part, and the horizontal length of the heating part is 1/3-1/2 of the horizontal length of the heating element.
Furthermore, actuating mechanism includes the crossbeam, hangs the suspended structure who establishes on the crossbeam, sets up the elevating system in the suspended structure bottom and sets up the supporting pulley who is used for supporting the connecting body on elevating system, the last mounting that is used for fixed connecting body that is equipped with of suspended structure.
Furthermore, the crossbeam has seted up the spout along length direction, the top of suspended structure is equipped with the fixed pulley that can follow the spout and remove, is equipped with coaxial first gear on this fixed pulley, the suspended structure is equipped with driving motor and installs the second gear on driving motor, first gear and second gear pass through the conveyer belt and connect.
In another aspect of the present invention, a method for manufacturing an auxiliary electric heating structure for a float line tin bath on-line is provided, which comprises the following steps:
providing a connecting main body and a die, and fixing the connecting main body in the die;
preparing a thermally stable element using a mold;
a connecting body and a drive mechanism are provided and the stabilizing element, heating element, connecting body and drive mechanism are assembled.
Further, the method for preparing the thermal stabilization element by using the mold comprises the following steps:
uniformly mixing a raw material of the hollow shell and water in a weight ratio of 1.08-0.15, and pouring the mixture into a mold, wherein the raw material of the hollow shell comprises the following components Al in parts by weight 2 O 3 60-68 parts of SiO 2 30-36 parts of Fe 2 O 3 Content is less than or equal to 0.7 part, na 2 The content of O is less than or equal to 0.3 part;
keeping the temperature of the mixture in the mold at 20-50 ℃ for more than 7 days;
and (5) demolding.
Further, the heat preservation of the mixture in the mould also comprises: spraying water to the mixture in the mold for keeping the temperature.
Further, the fixed connection body is in a mold, comprising: and wrapping the part of the connecting main body arranged in the mould with heat-insulating cotton.
(III) advantageous effects
The application discloses online auxiliary electric heating structure of floating normal tin bath and preparation method thereof, the online auxiliary electric heating structure of floating normal tin bath moves heating element through actuating mechanism, and the heating of fixed regional glass board is controlled to the fixed point to carry out effective control to the temperature field in the float glass production. In addition, the invention not only improves the heat preservation efficiency by arranging the thermal stabilization element, prevents the temperature of the tin bath from fluctuating after the connecting main body enters the tin bath, but also avoids the contact between the connecting main body and the heating element, realizes the insulation and support effect on the heating element, and ensures the farther depth of the heating element in the tin bath, thereby more effectively controlling the temperature field.
Drawings
The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining and illustrating the present application and should not be construed as limiting the scope of the present application.
FIG. 1 is a schematic structural diagram of an auxiliary electric heating structure for an online float line tin bath disclosed in the present application;
FIG. 2 is a schematic structural view of a thermally stable element in an auxiliary electric heating structure for an on-line float-line tin bath disclosed in the present application;
FIG. 3 is a schematic structural view of a connecting body in an auxiliary electric heating structure for an on-line float tin bath disclosed in the present application;
FIG. 4 is a schematic view of a U-shaped silicon carbide rod in an auxiliary electric heating structure for online float line tin bath disclosed in the present application;
FIG. 5 is a schematic structural diagram of a driving mechanism in an auxiliary electric heating structure for on-line use of a float line tin bath disclosed in the present application;
FIG. 6 is a schematic view of a mold assembly for making the thermally stable member disclosed herein;
the labels in the figure are: heating element 1, conductive part 101, heat generating part 102, terminal 103, heat stabilizing element 2, hollow shell 201, fixing groove 202, through hole 203, insulating tube 204, cooling air pipe 205, connecting body 3, water inlet pipe 301, water outlet pipe 302, cooling pipe 303, beam 4, suspension structure 5, lifting mechanism 6, supporting pulley 7, fixing piece 8, chute 9, fixed pulley 10, first gear 11, driving motor 12, second gear 13, conveyor belt 14, and mold 15.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application.
As shown in FIG. 1, the invention provides an auxiliary electric heating structure for online float line tin bath, which comprises a heating element 1, a supporting and connecting mechanism and a driving mechanism, wherein the heating element 1 is used for heating molten glass in the tin bath; the supporting and connecting mechanism comprises a thermal stabilizing element 2 and a connecting main body, wherein one end of the thermal stabilizing element 2 is connected with the connecting main body, and the other end of the thermal stabilizing element 2 is sleeved and connected on the heating element 1 in a sliding manner; the driving mechanism is connected with the connecting main body and can drive the connecting main body to move relative to the molten glass.
The invention provides an auxiliary electric heating structure for online float line tin bath, which adopts a driving mechanism to move a heating element 1 and controls the heating of a glass plate in a fixed area at a fixed point, thereby solving the problems of ultra-thin glass process defects or poor thickness or optics caused by the attenuation of electric heating power in the original design process. When the auxiliary electric heating structure is used specifically, two sets of the auxiliary electric heating structures for online use of the float line tin bath provided by the invention can be adopted and are symmetrically distributed on two sides of the tin bath.
Preferably, heating element 1 is located 200mm department above the glass board, has the heating fast, and is effectual, easily control, operates succinct advantage, can effectively solve glass board surface optical property and thickness scheduling problem badly.
Preferably, as shown in fig. 2, the thermal stabilization element 2 includes a hollow housing 201 and a fixing groove 202 disposed at one end of the hollow housing 201, and a through hole 203 capable of fixing the heating element 1 is opened at one end of the fixing groove 202 away from the hollow housing 201. The heating element 1 preferably uses a silicon carbide rod, and a burning gun and a brick structure covered with a molybdenum electrode and a platinum electrode can also be used.
Preferably, the heating element 1 includes a conductive portion 101, and a heat generating portion 102 and a terminal 103 respectively disposed at both ends of the conductive portion 101.
Preferably, the heating element 1 is a silicon carbide rod, the end of the thermal stabilization element 2 penetrated by the silicon carbide rod is a terminal 103, the conductive part 101 is arranged adjacent to the terminal 103, and the rest part is a heating part 102. In a specific implementation, the shape of the silicon carbide rod may be U-shaped, or may be other shapes, and only one end of the silicon carbide rod is required to be capable of generating heat as the heat generating portion 102, and the other end of the silicon carbide rod is required to be capable of being slidably inserted into the thermal stabilization element 2. In a specific implementation, when the heating element 2 is a U-shaped silicon carbide rod, the fixing groove 202 is provided with two through holes 203 capable of fixing two side arms of the U-shaped silicon carbide rod, and the openings of the through holes 203 are completely sealed by sealing mud, so that an influence source is prevented from entering from a gap.
In an exemplary embodiment, as shown in fig. 4, the heating element 1 is a U-shaped silicon carbide rod, two side arms of the U-shaped silicon carbide rod are terminals 103, two side arms are respectively provided with a conductive portion 101 adjacently, and the rest is a heating portion 102.
The U-shaped silicon carbide rod is provided with a heating part 102 at the U-shaped bent part, the horizontal length of the heating part 102 accounts for 1/3-1/2 of the horizontal length of the heating element, the heating part extends from the U-shaped bent part along two side wall ends and is used for heating the glass plate, and the U-shaped silicon carbide rod is internally provided with a through hole structure, so that the weight can be reduced, and the operation safety can be improved; two side arms of the U-shaped silicon carbide rod are inserted into the through hole of the thermal stabilization element 2, the heating part 102 is positioned outside the thermal stabilization element 2, and the heating part 102 is moved to a fixed point heating area to be electrified by controlling the suspension structure 5 to move back and forth.
Preferably, referring to fig. 6, an insulating tube 204 is installed in the through hole 203, and the heating element 1 is fixed in the insulating tube 204. In one embodiment, the insulating tube 204 is made of a high temperature resistant alumina ceramic tube with a wall thickness of 2-3mm, which mainly supports the heating element 1 and enhances the insulation.
Preferably, referring to fig. 2, a cooling air pipe 205 is further installed on the fixing groove 202, and the cooling air pipe 205 is spaced apart from the insulating pipe 204. The fixing groove 202 is filled with pure nitrogen gas introduced into the cooling gas pipe 205, and the pure nitrogen gas enters the thermal stabilization element 2 along the gap between the cooling device and the hollow shell 201, so that the thermal stabilization element 2 is effectively protected, and the strength of the thermal stabilization element 2 is prevented from being reduced due to high temperature.
Preferably, as shown in fig. 3, the connecting body 3 includes a cooling device, which extends into the hollow housing 201 after passing through the fixing groove 202, so as to cool the heating element 1 in the hollow housing 201.
Preferably, the cooling device comprises a water inlet pipe 301, a water outlet pipe 302 and a cooling pipe 303 wrapping the water inlet pipe 301 and the water outlet pipe 302, wherein the water inlet pipe 301 and the water outlet pipe 302 are arranged in parallel, and one end of the water inlet pipe 301 is communicated with one end of the water outlet pipe 302. In specific implementation, the cooling pipes 303 are made of rectangular steel and are arranged in an upper-lower mode, the lower rectangular steel wraps the water inlet pipe 301, the upper rectangular steel wraps the water outlet pipe 302, the size of the rectangular steel can be determined according to the size of the edge seal, when the cooling device is applied to a float method, the length of the cooling device is larger than or equal to 4.0m, and the length of the cooling device can be correspondingly adjusted according to actual conditions.
Preferably, the part of the cooling pipe 303 extending into the fixing groove 202 and/or the hollow shell 201 is wrapped with a buffer material. In specific implementation, the buffer material can be made of 0.5-1mm thick pearl cotton which is rapidly melted at high temperature, and is mainly used for protecting a cooling device in a hot state and avoiding deformation and leakage of the cooling device caused by extrusion of the cooling device due to thermal expansion of a thermal stabilizing element. Furthermore, the cooling tube 303 can be selected from square steel, round steel, rectangular steel and the like, common carbon steel or stainless steel can be selected, rectangular stainless steel is preferably selected, the supporting area between the thermal stabilization element 2 and the cooling tube 303 can be increased, and the supporting force of the thermal stabilization element 2 can be increased.
Preferably, as shown in fig. 5, the driving mechanism includes a cross beam 4, a suspension structure 5 hung on the cross beam 4, a lifting mechanism 6 arranged at the bottom of the suspension structure 5, and a supporting pulley 7 arranged on the lifting mechanism 6 for supporting the connecting body 3, and the suspension structure 5 is provided with a fixing member 8 for fixing the connecting body 3. In specific implementation, two sets of lifting mechanisms 6 are symmetrically arranged at the bottom of the suspension structure 5, and a supporting pulley 7 for supporting the connecting body 3 is mounted on each set of lifting mechanism 6. The lifting mechanism 6 comprises at least two lifting control screw rods which are arranged in parallel. The fixing member 8 includes a plurality of fixing nuts for fixing the connecting body 3.
The lower part of the suspension structure 5 is supported, combined and fixed with the connecting main body 3 through a supporting structure, the height of the supporting pulley 7 can be manually adjusted through the lifting control screw rod, so that the aim of controlling the connecting main body 3 to move up and down is fulfilled, and the fixing nut mainly plays a role in compressing and fixing the connecting main body 3 and adjusting the height of the lifting control screw rod at the same time so as to achieve the aim of adjusting the flatness of the connecting main body 3; the connecting main body 3 is placed on the supporting pulley 7, and the connecting main body 3 is fixedly connected through a fixing nut, so that the connecting main body 3 moves up and down and left and right;
simultaneously, see in fig. 1, the suspended structure can be divided into a suspended structure upper part and a suspended structure lower part, the connection part between the suspended structure upper part and the suspended structure lower part is preferably selected to be concise bolt connection, the cost is lower, the height of the connecting body 3 is adjusted through a manual control lifting control screw rod, the connection structure is more optimized, a rotary type connection structure can be selected, the rotating motor drives the suspended structure lower part to integrally rotate, automatic rotation is realized, the connecting body 3 and the angle of the electric heating entering the tin bath are controlled, the positive angle can be randomly selected, the negative angle or the 0 angle entering the tin bath, and the flexible control of the electric heating area is realized
More preferably, the cross beam 4 is provided with a sliding groove 9 along the length direction, the top of the suspension structure 5 is provided with a fixed pulley 10 capable of moving along the sliding groove 9, the fixed pulley 10 is provided with a coaxial first gear 11, the suspension structure 5 is provided with a driving motor 12 and a second gear 13 installed on the driving motor 12, and the first gear 11 and the second gear 13 are connected through a conveyor belt 14. In the specific implementation, the top of the suspension structure 5 is provided with two fixed pulleys 10 which can move along the sliding chute 9, wherein one fixed pulley 10 is provided with a coaxial first gear 11.
The movable fixed pulley 10 can realize the front and back movement of the whole structure under the driving of the driving motor 12 and the gear; mechanical limit is arranged on two sides of the cross beam, so that the trolley is protected and prevented from falling; when in specific use, the beam 4 can be an H-shaped beam.
In another aspect of the present invention, a method for manufacturing an auxiliary electric heating structure for a float line tin bath on-line is provided, which comprises the following steps:
providing a connecting main body and a die, and fixing the connecting main body in the die;
preparing a thermally stable element using a mold;
a connecting body and a drive mechanism are provided, and a stabilizing element, a heating element, a connecting body, and a drive mechanism are assembled.
Preferably, the method for preparing the thermal stabilization element by using the mold comprises the following steps:
(1) uniformly mixing the raw material of the hollow shell and water in a weight ratio of 1.08-0.15, and pouring the mixture into a mold, wherein the raw material of the hollow shell comprises the following components Al in parts by weight 2 O 3 60-68 parts of SiO 2 30-36 parts of Fe 2 O 3 Content is less than or equal to 0.7 part, na 2 The content of O is less than or equal to 0.3 part; the maximum temperature resistance of the thermal stabilization element prepared by adopting the raw materials is more than or equal to 1600 ℃.
(2) Keeping the temperature of the mixture in the mold at 20-50 ℃ for more than 7 days; and then demolding.
Preferably, the heat preservation of the mixture in the mold further comprises the step of spraying water to the mixture in the mold for preserving the moisture within the heat preservation time.
Preferably, the fixing and connecting body is arranged in the mold and comprises a heat preservation cotton wrapping the part of the connecting body installed in the mold.
In the structure, as the heat stabilizing element 2 with important supporting insulation and heat preservation functions, the specific processing steps are as follows:
the first step is as follows: manufacturing a mold 15, wherein the schematic view of the mold 15 is shown in fig. 6, the type of the mold 15 can be stainless steel, composite plates and other materials, and the composite plates are preferably selected to ensure that the surface of the mold is smooth and has no burrs;
the second step: wrapping the part of the front end of the cooling pipe 303 embedded into the thermal stabilization element 2 by heat preservation cotton with light material and thin thickness, preferably selecting pearl cotton, wherein the thickness interval is 0.5-1.0mm;
the third step: the wrapped cooling pipe 303 and insulation pipe are placed inside the hollow shell 201 and fixed well, the effect figure is shown in figure 6, the cooling pipe 303 and insulation pipe are ensured to be placed horizontally, lubricating oil is uniformly coated inside the hollow shell 201, and demolding is facilitated after molding; preferably, the insulating tube is an alumina ceramic tube.
The fourth step: selecting raw materials for manufacturing the thermal stabilization element 2, adding tap water, stirring, wherein the weight ratio of the raw materials to the water is (1) 0.08-0.15, preferably (1);
the fifth step: the mould 15 with uniform vibration is placed at a drying environment temperature of 20-50 ℃, a layer of water is sprayed on the surface of the mould by a sprayer in the morning and evening every day to protect the surface from drying and cracking, the heat stabilizing element 2 can be molded after 7 days of maintenance, and the mould 15 can be directly used after being removed.
Example one
A70T/D electronic glass production line is characterized in that during the production of strong high-aluminum-silicon ultrathin electronic glass, the microscopic waviness of the surface of a glass plate is relatively poor, when the thickness of the glass plate is 0.65mm, the microscopic waviness of the surface of the glass plate is generally 0.20-0.25 mu m/20mm, through a point light source detector, the surface of the glass plate has a tin bath defect like a showering type, and a stripe defect similar to a channel on the surface of the glass plate is mainly caused by the mechanical stress problem of an edge roller or the non-uniform temperature field of glass liquid forming defects during the glass forming process, through the adjustment of an electric heating temperature system and the like, the waviness is continuously improved, in order to solve the problem, 1 pair of auxiliary electric heating structures are respectively arranged in a tin bath reheating region, such as the front of a No. 4 edge roller, the front of a No. 6 edge roller and the front of a No. 8 edge roller, the single pair of electric heating power is opened by about 15-25kw, the temperature effect of the auxiliary electric heating structures, the waviness are obviously improved, and the final waviness are stabilized at 0.10-0.15 mu m/20mm, the stripe defects on the surface are obviously reduced, and the qualified product is met.
Example two
During the production of secondary-strength lithium aluminum silicon electronic glass, a certain 50T/D electronic glass production line has more crystallization defects of a glass plate due to the fact that lithium aluminum silicon is very easy to crystallize, in order to reduce the defects of the glass plate, the temperature of the glass plate is increased, the opening power of a silicon carbon rod is increased to be more than 90% at most, after the glass plate is used for a long time due to the fact that the electric heating opening is high, the maximum power of the silicon carbon rod in an important forming area is generally attenuated by more than 50% and the maximum area is attenuated by more than 70%, the thickness and thickness difference is completely uncontrollable, the thickness difference is increased from the initial thickness of being less than or equal to 0.02mm to be more than or equal to 0.05mm, and the requirement that the maximum thickness difference is less than or equal to 0.03mm is not met. After an auxiliary electric heating structure is additionally arranged, the thickness difference is effectively controlled, and the method specifically comprises the following steps:
(1) Rectangular stainless steel is used as a cooling water pipe, the size of the rectangular steel is 100mm 60 x 4500mm x 6mm, the welded rectangular steel is wrapped and wound by pearl wool with the thickness of 0.5mm, and the welded rectangular steel is placed in the die 15;
(2) Mounting and fixing an alumina ceramic tube in the mold 15, wherein the size of the alumina ceramic tube is 50mm × 1120mm × 2.5mm;
(3) Coating lubricating oil inside the die 15, pouring the stirred raw materials for manufacturing the thermal stabilization element 2 into the die 15, vibrating by using a small vibrating rod to be uniform and compact, placing the die 15 outside a tin bath at the ambient temperature of 38 +/-5 ℃, placing and maintaining for 7 days, and then forming;
(4) The connecting main body 3 is placed on the driving mechanism, the fixing position is fixed, a fixing groove is installed, the diameter of the nitrogen inlet is phi 15mm, and the fixing groove is a stainless steel square groove;
(5) Inserting a high-density U-shaped silicon-carbon rod into a through hole of the alumina ceramic tube, wherein the silicon-carbon rod is a high-density silicon-carbon rod with the diameter of 40mm, the maximum heating power of 45 +/-5 kw, the heating part 102 is positioned at the position of 1000mm of the head of the heating part, and the total length of the heating part is 2250mm;
(6) In 16 total tin baths of drawing edge machine lines, respectively before drawing edge machine 1, before drawing edge machine 5 and before drawing edge machine 8# install 3 to supplementary electrical heating structure, be used for heating glass plate temperature before drawing edge machine 1, reduce because of the crystallization defect that the glass liquid temperature is low to lead to, before drawing edge machine 5 and before drawing edge machine 8 be important thickness exhibition thin district for the intensification exhibition of glass plate is thin.
Table 1 is an example of an online auxiliary electrical heating structure for a tin bath using a floating normal in a number of production environments:
if in the normal production period, because the electric heating power is normal, the thickness difference can be well controlled by increasing and decreasing the electric power, and during the production period of 0.55mm, the maximum thickness of the transverse glass plate is 0.555mm, the minimum thickness is 0.541mm, the thickness difference is 0.014mm, and the standard thickness difference of 0.03mm is met;
during the electric heating attenuation period, the temperature field of the glass plate is difficult to control due to the serious electric heating attenuation of the forming area, the thickness difference is serious exceeding the standard and cannot be adjusted due to the fact that the important thickness expanding area cannot meet the electric heating requirement, wherein the maximum thickness is 0.607mm, the minimum thickness is 0.552mm, and the thickness difference is 0.055mm;
after the auxiliary electric heating is added, each pair of electric power can be increased by 80kw at most, the glass thinning capability is improved due to the rising of the electric heating capability, the thickness difference is gradually recovered to be stable, the maximum thickness is 0.563mm, the minimum thickness is 0.542mm, the thickness difference is 0.021mm, and the production is stable.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (17)
1. The utility model provides an online supplementary electrical heating structure of using of float normal tin bath which characterized in that includes:
the heating element is used for heating the molten glass in the tin bath;
the support connecting mechanism comprises a thermal stabilizing element and a connecting main body, wherein one end of the thermal stabilizing element is connected with the connecting main body, and the other end of the thermal stabilizing element is sleeved on and connected to the heating element in a sliding manner;
and the driving mechanism is connected with the connecting main body and can drive the connecting main body to move relative to the molten glass.
2. The auxiliary electric heating structure for the on-line float line tin bath of claim 1, wherein: the thermal stabilizing element comprises a hollow shell and a fixing groove arranged at one end of the hollow shell, and a through hole capable of fixing the heating element is formed in one end, far away from the hollow shell, of the fixing groove.
3. The auxiliary electric heating structure for the on-line floating normal tin bath of claim 2, wherein: an insulating tube is arranged in the through hole, and the heating element is fixed in the insulating tube.
4. The auxiliary electric heating structure for the online floating line tin bath of claim 2, wherein: the fixed slot is also provided with a cooling air pipe.
5. The auxiliary electric heating structure for the online floating line tin bath of claim 2, wherein: the connecting main body comprises a cooling device, and the cooling device penetrates through the fixing groove and then extends into the hollow shell to cool the heating element in the hollow shell.
6. The auxiliary electric heating structure for the online floating line tin bath of claim 5, wherein: the cooling device comprises a water inlet pipe, a water outlet pipe and a cooling pipe wrapping the water inlet pipe and the water outlet pipe, wherein the water inlet pipe and the water outlet pipe are arranged in parallel, and one end of the water inlet pipe is communicated with one end of the water outlet pipe.
7. The auxiliary electric heating structure for the on-line float line tin bath of claim 6, wherein: the part of the cooling pipe extending into the fixing groove and/or the hollow shell is wrapped with a buffer material.
8. According to the claim2, the auxiliary electric heating structure for the online float line tin bath is characterized in that the hollow shell comprises the following components in parts by weight: al (Al) 2 O 3 60-68 parts of SiO 2 30-36 parts of Fe 2 O 3 Content is less than or equal to 0.7 part, na 2 The content of O is less than or equal to 0.3 part.
9. The auxiliary electric heating structure for the on-line float line tin bath of claim 1, wherein: the heating element comprises a conductive part, and a heating part and a terminal which are respectively arranged at two ends of the conductive part.
10. The auxiliary electric heating structure for the on-line float line tin bath of claim 9, wherein: the heating element is a silicon carbide rod, the silicon carbide rod penetrates through the end portion of the thermal stabilization element to be a wiring end, the conductive portion is arranged adjacent to the wiring end, and the rest portion is a heating portion.
11. The auxiliary electric heating structure for the on-line float line tin bath of claim 10, wherein: the silicon carbide rod is a U-shaped silicon carbide rod, the end parts of two side arms of the U-shaped silicon carbide rod are wiring ends, the two side arms are respectively and adjacently provided with a conductive part, the annular end of the U-shaped silicon carbide rod is a heating part, and the horizontal length of the heating part is 1/3-1/2 of the horizontal length of the heating element.
12. The auxiliary electric heating structure for the online floating line tin bath of claim 1, wherein: the driving mechanism comprises a cross beam, a suspension structure hung on the cross beam, a lifting mechanism arranged at the bottom of the suspension structure, and a supporting pulley arranged on the lifting mechanism and used for supporting the connecting body, wherein a fixing piece used for fixing the connecting body is arranged on the suspension structure.
13. The auxiliary electric heating structure for the on-line float line tin bath of claim 12, wherein:
the beam is provided with a sliding groove in the length direction, the top of the suspension structure is provided with a fixed pulley capable of moving along the sliding groove, a first coaxial gear is arranged on the fixed pulley, the suspension structure is provided with a driving motor and a second gear installed on the driving motor, and the first gear and the second gear are connected through a conveying belt.
14. A method for manufacturing an auxiliary electric heating structure for an online float line tin bath according to any one of claims 1 to 13, comprising the following steps:
providing a connecting main body and a die, and fixing the connecting main body in the die;
preparing a thermally stable element using a mold;
a connecting body and a drive mechanism are provided and the stabilizing element, heating element, connecting body and drive mechanism are assembled.
15. The method for manufacturing the auxiliary electric heating structure for the on-line float line tin bath according to claim 14, wherein the method for manufacturing the thermal stabilization element by using the mold comprises the following steps:
uniformly mixing the raw material of the hollow shell and water in a weight ratio of 1.08-0.15, and pouring the mixture into a mold, wherein the raw material of the hollow shell comprises the following components Al in parts by weight 2 O 3 60-68 parts of SiO 2 30-36 parts of Fe 2 O 3 Content is less than or equal to 0.7 part, na 2 The content of O is less than or equal to 0.3 part;
keeping the temperature of the mixture in the mold at 20-50 ℃ for more than 7 days;
and (5) demolding.
16. The method for manufacturing the auxiliary electric heating structure for the online float line tin bath according to claim 15, wherein the step of preserving the temperature of the mixture in the mold further comprises the following steps: spraying water to the mixture in the mold for keeping the temperature.
17. The method for manufacturing the auxiliary electric heating structure for the on-line float line tin bath according to claim 14, wherein the fixed connecting body is arranged in a mold and comprises: and wrapping the part of the connecting main body arranged in the mould with heat-insulating cotton.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348824A (en) * | 2020-04-30 | 2020-06-30 | 重庆鑫景特种玻璃有限公司 | Glass edge heater, float glass processing method and glass |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111348824A (en) * | 2020-04-30 | 2020-06-30 | 重庆鑫景特种玻璃有限公司 | Glass edge heater, float glass processing method and glass |
| CN111348824B (en) * | 2020-04-30 | 2024-02-27 | 重庆鑫景特种玻璃有限公司 | Glass edge heater, float glass processing method and glass |
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