CN210313992U - Float glass forming device for improving utilization efficiency of protective gas and float glass melting system - Google Patents
Float glass forming device for improving utilization efficiency of protective gas and float glass melting system Download PDFInfo
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- CN210313992U CN210313992U CN201921224350.0U CN201921224350U CN210313992U CN 210313992 U CN210313992 U CN 210313992U CN 201921224350 U CN201921224350 U CN 201921224350U CN 210313992 U CN210313992 U CN 210313992U
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Abstract
The utility model provides an improve float glass forming device and float glass system of founding of protective gas utilization efficiency, float glass forming device include the shaping groove, the shaping tank cavity in pour into tin liquid, tin liquid top set up at least one and prevent the ease device, it is used for preventing to let in the ease device the protective gas of tin liquid oxidation. The utility model discloses a set up above the molten metal and prevent the ease device and make protective gas direct action prevent the molten metal oxidation on the molten metal surface, effectively avoided the protective gas to escape, improved protective gas's utilization efficiency. And simultaneously, the utility model discloses an improved mode need not to adjust by a wide margin current shaping groove, has practiced thrift the improvement cost and the investment cost of equipment.
Description
Technical Field
The utility model belongs to the technical field of glass production technology, a float glass forming device is related to, especially relate to a float glass forming device who improves protective gas utilization efficiency.
Background
Nowadays, with the rapid development of glass production technology, glass is no longer only of a single kind, and various types of glass products suitable for various occasions are developed. The plate glass at present can be divided into the following parts according to different production processes: the more common flat glass preparation process is the float forming process, namely molten glass liquid with small specific gravity floats on the surface of tin liquid with large specific gravity, and the molten glass liquid is cooled, solidified and formed under the combined action of self gravity, surface tension, annealing roller pulling force and an edge roller to produce the flat glass with required thickness and width.
The float glass process mainly comprises the following steps: batching, melting, forming and coating, annealing and cutting. The forming and coating process is the most critical step in the float glass production process, and the forming and coating process is carried out in a tin bath, so the tin bath naturally becomes one of the most critical thermal equipment in a float glass production system, and is a rectangular or horn-shaped bath body with a wide front part and a narrow back part and a contracted middle part, which contains tin liquid, and the tin bath consists of three parts: entrance point, molten tin bath body and exit end (transition roller platform), the entrance point is the transition department of molten tin bath and melting furnace, and the exit end is the junction of molten tin bath and annealing furnace, and the molten tin bath body is a cuboid airtight space of building with steel sheet and refractory material.
Because the tin liquid is easy to be oxidized into tin oxide after meeting oxygen and is adhered to the surface of glass to cause the defect of the glass, a certain amount of protective gas is generally introduced into the tin bath, and a positive pressure of dozens of Pa is formed in the tin bath to prevent oxygen-containing gas outside the tin bath from entering people. After the glass liquid enters the tin bath, the glass liquid is flattened, polished, thinned or thickened on the tin liquid surface to form a continuous glass belt, and the tin bath is filled with N all the time2And H2And the like to reduce the oxidation of the tin liquid.
CN207347388U discloses a tin bath device for a float glass production line, which is provided with a tin bath body; tin liquid is placed in the tin bath body, and a glass ribbon floats above the tin liquid; the bottom of the tin bath body is provided with a graphite baffle ridge for reducing tin liquid backflow and improving tin liquid convection; the graphite baffle ridges are arranged in parallel; the tin bath device is also provided with a baffle curtain used for separating the glass ribbon from the exposed tin liquid surface; the plurality of the stop curtains are positioned on two sides of the width direction of the glass belt.
CN208279494U discloses a float glass tin bath, comprising a bottom shell having a receiving cavity and serving as a support structure for providing support to the float glass tin bath; the main insulating brick layer is arranged on the inner side of the accommodating cavity and used for forming a container for containing tin liquid, and the main insulating brick layer and the bottom shell together form a wide section, a contraction section and a narrow section of the float glass tin bath; and the auxiliary insulating brick layer is arranged on the main insulating brick layer positioned at the narrow section and can reduce the width proportion of the narrow section of the tin bath and the wide section of the tin bath.
CN109455908A discloses a float glass tin bath for ultra-thin glass forming, comprising: the tank body comprises a feeding opening, a wide section and a contraction section which are sequentially arranged along the length direction of the tank body, wherein the wide section comprises a high-temperature zone adjacent to the feeding opening, a medium-temperature zone adjacent to the contraction section and a forming zone positioned between the high-temperature zone and the medium-temperature zone; a plurality of pairs of flag type blocking flags are arranged in the middle temperature area and/or the forming area at intervals along the length direction of the groove body; and a plurality of pairs of immersed blocking flags which are arranged in the high-temperature area at intervals along the length direction of the tin bath.
However, the float glass tin bath disclosed in the prior art still has the problem that a large amount of protective gas easily escapes, because the distance between the top shell of the tin bath and the molten tin is long, the protective gas escapes from the outlet end of the tin bath after being introduced into the tin bath and not contacting the molten tin, and the protective gas cannot fully play the role of preventing oxidation.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art existence, the utility model aims to provide an improve float glass forming device of protective gas utilization efficiency makes protective gas direct action prevent the tin liquid oxidation on the tin liquid surface through set up the anti-ease device in tin liquid top, has effectively avoided the protective gas to escape, simultaneously, the utility model discloses an improved mode need not to adjust by a wide margin current shaping groove structure, has practiced thrift the improvement cost and the investment cost of equipment.
To achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the utility model provides an improve float glass forming device of protective gas utilization efficiency, float glass forming device include the shaping groove, shaping groove cavity in pour into tin liquid, tin liquid top set up at least one and prevent the ease device, it is used for preventing to let in the ease device the protective gas of tin liquid oxidation.
The utility model discloses a set up above the tin liquor and prevent the ease device and make protective gas direct action prevent the tin liquor oxidation on the tin liquor surface, effectively avoided the protective gas to escape, improved protective gas's utilization efficiency. And simultaneously, the utility model discloses an improved mode need not to adjust by a wide margin current shaping groove structure, has practiced thrift the improvement cost and the investment cost of equipment.
In addition, it should be noted by those skilled in the art that, although the term "device" is used in the present invention, it is known to the applicant, and only the name of the device is changed, the general structure of the device is similar to that of the device known in the art. For example: the utility model discloses the "shaping groove" that appears is the general "molten tin bath" in this field, and its structure keeps unanimous with the structure of "molten tin bath" on a large scale, and the difference lies in only that this application is unanimous with the general molten tin bath of publicly known in this field to within the limited range of shaping groove, other structures and spare part.
As an optimized technical scheme of the utility model, the shaping groove top be provided with the generating line room that is used for installing heating cable.
The heating cable is a cable electrically connected with the transformer above the forming groove shell and the heating device at the top.
In addition, the forming groove should also include an inlet end and an outlet end, the inlet end is butted with a melting furnace (the melting furnace is used for melting raw materials, which is well known to those skilled in the art and will not be described herein), the molten glass obtained by melting in the melting furnace enters the forming groove through a flow channel, the thermal structure is called as the inlet end of the forming groove, the flow channel can be shrinkage type, straight-through type or horn type, the refractory material used by the flow channel must ensure that the molten glass can be resistant to erosion and washing, the molten glass cannot be polluted after erosion and washing, no air bubbles are generated in the use process, the thermal stability is excellent, and the surface is smooth and has no cracks. The outlet end of the forming groove is butted with an annealing furnace (the annealing furnace is used for annealing the glass ribbon leaving the forming groove, and similarly, the structure and the function of the annealing furnace are also known by persons skilled in the art, and are not described herein, and in addition, the glass ribbon is a product obtained by cooling, solidifying and forming glass liquid in the forming groove, and the glass ribbon appearing below can be understood in the same way), the structure of the outlet end determines the air tightness of the forming groove, the outlet end mainly comprises an adjustable roller way and a check curtain, and the adjustable roller way is used for generating a climbing force to pull the glass ribbon to advance and gradually separate from the molten tin; the check curtain is used for increasing the outlet pressure of the protective gas and preventing external air from being connected into the forming groove. In addition, the forming groove main body comprises a groove bottom, a breast wall and a top cover, the groove bottom is the cavity bottom of the forming groove limited by the utility model, the used material is refractory material, and is optionally used in the utility model, the refractory material of the groove bottom comprises refractory bricks or refractory concrete, wherein the refractory bricks are clay, when the groove bottom is laid by the refractory bricks, the specification and the size of the refractory bricks are required to be accurate, each surface is flat, the brick joints are aligned during laying, and each brick is connected and fixed with a bottom steel structure by an iron piece to prevent the floating of the brick after molten tin permeates along the brick joints; the refractory concrete is an unshaped refractory material, when the refractory concrete is used as the groove bottom, the precalcination is not needed, the process is simple, and the refractory concrete can be prefabricated into components for assembly and can also be formed on site. The top cap is promptly the utility model discloses the top of injecing the shaping groove cavity adopts flat furred ceiling full seal structure mostly, the material and the shape diverse of top cap, heating device set up on the top cap. The breast wall is a wall body between the top cover and the side wall bricks of the forming groove, which is built by heat insulation materials with good heat insulation performance, and is wrapped by iron sheets and mainly used for sealing the forming groove. It should be noted that the trough bottom, the breast wall and the roof are technical terms in the art and can be understood in a known sense. In addition, the float glass forming device defined by the present invention should also include necessary components for achieving process integrity, which are not clearly defined but are well known to those skilled in the art, and thus will not be described herein again.
And the top of the bus chamber is provided with a protective gas inlet.
Illustratively, two protective gas inlets are arranged at the top of the bus chamber, one is used for introducing nitrogen and the other is used for introducing hydrogen, and the nitrogen and the hydrogen also produce the effect of uniform mixing while cooling the bus in the bus chamber.
And protective gas is filled in the bus chamber.
The protective gas is a mixed gas of nitrogen and hydrogen.
Since the temperature of the busbar compartment is not allowed to exceed 260 ℃, the busbar stored in the busbar compartment is cooled by charging a protective gas into the busbar compartment.
In addition, because the tin liquid is easy to be oxidized to generate tin oxide which is adhered to the surface of the glass to cause the appearance defect of the glass and influence the yield of products, the tin liquid can be effectively prevented from being oxidized by filling protective gas to keep the polishing degree of the glass, and in addition, the defects of iridescence, tin dipping, optical distortion and the like can be favorably reduced. Can also mutually independent through the pipeline intercommunication between bus-bar room and the shaping groove, also can guarantee that protective gas gets into the shaping groove by the bus-bar room if two cavities are mutually independent, this is because there is the space between the hanging brick at shaping groove top, and protective gas can get into the shaping groove and act on the molten tin surface through the space. Since the purpose of the protective gas is to prevent the tin liquid from being oxidized, in the present invention, it is particularly preferable to use a reducing gas as the protective gas.
As an optimized technical scheme, the shaping groove in pour into tin liquid, the glass liquid that has flowed into the shaping groove floats above the tin liquid.
As an optimized technical scheme, be provided with at least one along the glass liquid flow direction and prevent the ease device of protective gas escape, prevent that the ease device is unsettled to be set up in the tin liquid top that does not float and have the glass liquid.
And protective gas for preventing the tin liquid from being oxidized is introduced into the anti-escape device, and the protective gas is directly contacted with the tin liquid under the action of the anti-escape device.
As an optimized technical scheme of the utility model, the anti-escape device be an open-ended anti-escape box, the anti-escape box opening towards the tin liquor surface.
As an optimized technical scheme of the utility model, prevent external conveyer pipe of ease box, the conveyer pipe is used for the fixed stay to prevent the ease box and to preventing letting in protective gas in the ease box.
The protective gas enters the anti-escape box through the conveying pipe, and the opening of the anti-escape box faces the tin liquid, so that the protective gas can be in direct contact with the tin liquid, an effective anti-oxidation effect is exerted on the tin liquid, in addition, the anti-escape box is arranged, the protective gas is prevented from escaping from the outlet of the forming groove, the using amount of the protective gas is saved, and the using efficiency of the protective gas is improved.
As an optimized technical scheme of the utility model, the anti-escape box unsettled set up in the tin liquid top that does not float there is glass liquid. Tin liquor oxidation mainly takes place in the region that does not float and have the glass liquid, therefore, the anti-escape box that this application provided sets up in particular in the tin liquid that does not float and have the glass liquid top to guarantee that a plurality of anti-escape boxes cover the tin liquid that exposes outside completely.
The opening of the anti-escape box is tightly attached to the surface of the molten tin without floating molten glass and is not in contact with the molten tin.
As an optimal technical scheme, the shaping inslot portion be provided with the gas pipeline, the entrance point of gas pipeline is located the generating line room, the exit end of gas pipeline passes the gap entering shaping groove between the top cap brick of shaping groove.
The utility model discloses except setting up the anti-ease device, still set up gas line in the shaping inslot portion for protective gas is through the gas line direct contact to tin liquid surface, has strengthened protective gas's anti-oxidation effect and has also effectively prevented gas escape or via the brickwork joint volatilizees.
And a heating device is also arranged at the top of the forming groove. The heating device is mainly used for: (1) baking and forming the groove; (2) maintaining and adjusting the temperature of each process area in the forming groove; (3) and the first forming groove is used for preserving heat when an accident occurs.
The heating device is an electric heating element. Exemplary electrical heating elements commonly used in the art include three-phase silicon carbide rods or iron chromium aluminum resistance wires.
As an optimized technical proposal of the utility model, the float glass forming device also comprises a traction device which is used for drawing the glass liquid and controlling the thickness of the formed glass. Under the condition of no external force, the gravity and the surface tension borne by the molten glass on the high-temperature tin liquid surface reach balance, and a predictable fixed value, namely the balance thickness, exists in the thickness of the glass ribbon, and is generally about 6-7 mm. Since the surface tension of glass varies with the temperature of the molten glass, the equilibrium thickness also varies depending on the specific conditions. In practice, this value is slightly lower due to the applied longitudinal tension. In actual production, the balance thickness often cannot meet the diversified requirements of customers, and therefore, corresponding measures should be taken to make the actual thickness of the glass ribbon thinner or thicker than the balance thickness. For example, when float glass thinner than the equilibrium thickness is produced, a mechanical edge-drawing method may be adopted, i.e., a plurality of edge-drawing machines are arranged at both sides of the glass ribbon in the middle section of the forming tank, which mainly play a role of transverse edge-drawing and prevent the longitudinal tension of the annealing furnace rollers (which are well known to those skilled in the art and are not described herein) from being transmitted to the glass ribbon in the high-temperature zone, so as to reduce the transverse shrinkage thereof. When float glass with thickness greater than balance thickness is produced, graphite edge stoppers are arranged on two sides of the high-temperature zone of the forming tank to prevent the molten glass from being thinned.
The traction device is an edge roller. The edge roller is used for throttling, thinning, thickening and controlling the trend of the glass ribbon, and the working principle of the edge roller is that the edge roller at the forefront end of the edge roller pulls the glass ribbon on a load tin liquid surface to advance, and the purposes of controlling the thickness of the glass ribbon and stabilizing the width of the glass ribbon are achieved by adjusting the edge roller, the linear speed, the horizontal swing angle, the horizontal inclination angle and the like of the edge roller.
In a second aspect, the present invention provides a float glass melting system, which comprises a batching unit, a melting unit, a forming unit and an annealing unit connected in sequence according to a float glass production process route.
The forming unit comprises the float glass forming apparatus of the first aspect.
The float glass melting system defined in the utility model only improves the forming unit, and other units such as the batching unit, the melting unit, the forming unit and the annealing unit are known to those skilled in the art, and are all disclosed by the prior art, and do not fall into the protection scope and the disclosure scope of the utility model, and any units which are disclosed in the prior art or are not disclosed in the new technology can be used in the utility model.
Adopt the utility model provides a float glass forming device carries out float glass's preparation, preparation method specifically include:
after tin liquid is poured into the forming groove, introducing protective gas into a protective gas inlet, introducing the protective gas into a gas pipeline through a bus chamber, introducing the protective gas into the forming groove through the gas pipeline, and directly contacting the surface of the tin liquid to prevent the tin liquid from being oxidized;
and (II) in the process that the molten glass is spread and thinned on the surface of the molten tin, the glass is drawn by the drawing devices at the two sides of the forming groove to move towards the opening direction of the forming groove.
Illustratively, the present invention provides an alternative float glass melting process route:
preparing materials: raw materials such as sand, dolomite, lime stone, soda and glauber's salt are transported to the batching room, are provided with feed bin, hopper, conveyer belt, chute in the batching room, dust arrester and necessary control system. Inside the batching room, the conveyer belt is carried raw and other materials to bucket elevator in order from various raw materials feed bins, then is sent to weighing device in order to detect its compound weight, mixes 10 ~ 30 wt% recovery cullet or production line feed back in the mixture, stirs into the batch mixture, and the batch mixture that stirs is sent to the melting furnace feed bin from the batching room through the conveyer belt and is stored, then controls the speed that the batch mixture got into the melting furnace through the feeder.
(II) melting: the mixed batch is sent into a melting unit, the melting unit is a melting furnace, the melting furnace mainly comprises a melting tank/a clarification tank, a working tank, a regenerative chamber and a small furnace, and the outer frame has a steel structure. The batch is fed into a melting tank by a feeder, the melting tank is heated to 1650 ℃ by a natural gas spray gun, the molten glass liquid flows from the melting tank to a neck region through a clarification tank, flows into a working tank after being uniformly stirred, and is slowly cooled to about 1100 ℃ so as to reach a reasonable viscosity range before reaching a forming tank.
(III) forming and coating: the molten glass flows out from the melting furnace through the runner area, the flow rate of the molten glass is controlled by the adjustable gate, and the gate is deeply inserted into the molten glass by +/-0.15 mm. After the molten glass enters the forming groove, the molten glass floats on the surface of molten tin, the molten glass is flattened and thinned under the action of the self gravity and the surface tension of the molten glass, the edge rollers on two sides of the forming groove pull the molten glass, an operator sets the advancing speed of the edge rollers through a control program so as to control the thickness of the glass ribbon, and the thickness of the glass ribbon can be adjusted randomly between 0.55 mm and 25 mm. And (3) as the molten glass continuously flows through the molten tin, the temperature of the molten glass is gradually reduced, and the molten glass is solidified and molded.
(IV) annealing: send into the annealing kiln through the annealing kiln roller with fashioned glass area, include automatically controlled heating element and fan in the annealing kiln to keep the distribution of the horizontal temperature of glass area to last stable, make the temperature gradient decline of glass area through the control heat, finally fall to ambient temperature, thereby eliminate the harmful internal stress in the glass.
It should be understood that the specific float glass melting process route described above is not intended to be limiting and within the scope of the present disclosure, but is merely provided as an exemplary description to help those skilled in the art better understand the technical solution of the present invention, and therefore, the above process route and process parameters do not substantially limit the present invention.
The numerical range of the present invention includes not only the point values listed above, but also any point values between the above numerical ranges not listed, which is limited to space and for the sake of brevity, the present invention does not exhaust the specific point values included in the range.
The system refers to an equipment system, or a production equipment.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a set up above the tin liquor and prevent the ease device and make protective gas direct action prevent the tin liquor oxidation on the tin liquor surface, effectively avoided the protective gas to escape, improved protective gas's availability factor. And simultaneously, the utility model discloses an improved mode need not to adjust by a wide margin current shaping groove, has practiced thrift the improvement cost and the investment cost of equipment.
Drawings
FIG. 1 is a schematic cross-sectional view of a float glass forming apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a float glass forming apparatus according to an embodiment of the present invention;
wherein, 1-glass liquid; 2-forming a groove; 3-an escape prevention device; 4-a conveying pipe; 5-a traction device; 6-protective gas inlet; 7-a bus bar chamber; 8-a heating device; 9-tin liquor; 10-tin liquid inlet.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
It is to be understood that the terms "inlet," "outlet," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operative in a particular orientation, and therefore should not be considered limiting of the invention.
It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
In a specific embodiment, the utility model provides an improve float glass forming device of protective gas utilization efficiency, float glass forming device as shown in figure 1 and figure 2, including shaping groove 2, pour into tin liquid 9 in the 2 cavities of shaping groove, tin liquid 9 top sets up at least one and prevents ease device 3, lets in preventing ease device 3 and is used for preventing the protective gas of tin liquid 9 oxidation.
The top of the forming groove 2 is provided with a bus chamber 7 for installing a heating cable, the top of the bus chamber 7 is provided with a protective gas inlet 6 and a molten tin inlet 10, the bus chamber 7 is filled with a protective gas, and the protective gas is optionally a weak reducing gas, such as a mixed gas of nitrogen and hydrogen.
Molten tin 9 is filled into the molding groove 2, and molten glass 1 flowing into the molding groove 2 floats above the molten tin 9.
At least one anti-escape device 3 for preventing protective gas from escaping is arranged along the flowing direction of the molten glass 1, the anti-escape device 3 is arranged above the molten tin 9 (shown in figure 1) without floating the molten glass 1 in a suspending way, the protective gas for preventing the molten tin 9 from being oxidized is introduced into the anti-escape device 3, and the protective gas can be directly and fully contacted with the molten tin 9 under the action of the anti-escape device 3, so that the effect of preventing the molten tin 9 from being oxidized is more effectively exerted. Exemplarily, the utility model provides a concrete ease device 3 that prevents, it prevents the ease device 3 is one side open-ended and prevents the ease box, the opening is towards tin liquid 9 surfaces, prevent the external conveyer pipe 4 of ease box, conveyer pipe 4 is used for the fixed stay on the one hand to prevent the ease box, make prevent that the ease box can unsettled set up in not floating the tin liquid 9 top that has glass liquid 1, on the other hand, let in protective gas in preventing the ease box through conveyer pipe 4, protective gas can with tin liquid 9 direct contact under preventing sheltering from of ease box, thereby effective performance prevents the effect of tin liquid 9 oxidation, special attention is, the unsettled height of preventing the ease box should not be too high, hug closely tin liquid 9 surfaces as far as possible, nevertheless should ensure not contact with tin liquid 9.
The inside gas pipeline that still is provided with of shaping groove 2, the entrance point intercommunication generating line room 7 of gas pipeline, exit end pass the inside of the gap entering shaping groove 2 between the top cap brick of shaping groove 2, protective gas that fills in generating line room 7 passes through the gas pipeline and gets into shaping groove 2 and directly blows the tin liquid 9 surface.
The inside heating device 8 that still is provided with of shaping groove 2, specifically, heating device 8 is located the cavity top of shaping groove 2, and heating device 8 adopts electric heating element, and optional electric heating element includes three-phase silicon carbide stick or iron chromium aluminium resistance wire.
The float glass forming device also comprises a traction device 5, wherein the traction device 5 is used for drawing the molten glass 1 and controlling the thickness of the formed glass ribbon, and the traction device 5 is an edge roller.
In another embodiment, the present invention provides a float glass melting system, which comprises a batching unit, a melting unit, a forming unit and an annealing unit connected in sequence according to a float glass production process route, wherein the forming unit comprises the above float glass forming device.
The applicant states that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that any changes or substitutions easily conceivable by those skilled in the art within the technical scope of the present invention are within the protection scope and the disclosure scope of the present invention.
Claims (10)
1. The utility model provides an improve float glass forming device of protective gas utilization efficiency which characterized in that, float glass forming device include the shaping groove, shaping inslot cavity in pour into tin liquid, tin liquid top set up at least one and prevent the ease device, prevent letting in the ease device and be used for preventing the protective gas of tin liquid oxidation.
2. The float glass forming apparatus according to claim 1, wherein a bus bar room for installing a heating cable is provided at the top of the forming trough;
the top of the bus chamber is provided with a protective gas inlet;
protective gas is filled into the bus chamber;
the protective gas is a mixed gas of nitrogen and hydrogen.
3. The float glass forming apparatus according to claim 2, wherein the forming bath is filled with molten tin, and the molten glass flowing into the forming bath floats above the molten tin.
4. The float glass forming apparatus according to claim 3, wherein at least one escape preventing means for preventing the shielding gas from escaping is provided along the flow direction of the molten glass, and the escape preventing means is provided in the air above the molten tin in which the molten glass does not float;
and protective gas for preventing the tin liquid from being oxidized is introduced into the anti-escape device, and the protective gas is directly contacted with the tin liquid under the action of the anti-escape device.
5. The float glass forming apparatus according to claim 4, wherein the escape preventing means is an escape preventing box having an opening on one side, the escape preventing box opening facing the surface of the molten tin.
6. The float glass forming apparatus according to claim 5, wherein the anti-escape box is externally connected with a delivery pipe, and the delivery pipe is used for fixedly supporting the anti-escape box and introducing a protective gas into the anti-escape box.
7. The float glass forming apparatus according to claim 6, wherein the escape prevention box is suspended above the molten tin on which the molten glass does not float;
the opening of the anti-escape box is tightly attached to the surface of the molten tin without floating molten glass and is not in contact with the molten tin.
8. The float glass forming apparatus according to claim 7, wherein a gas line is provided inside the forming trough, an inlet end of the gas line is located in the bus bar chamber, and an outlet end of the gas line passes through a gap between the top cover bricks of the forming trough and enters the forming trough;
the top of the forming groove is also provided with a heating device;
the heating device is an electric heating element.
9. The float glass forming apparatus according to claim 8, further comprising a drawing device for drawing the molten glass and controlling a thickness of the formed glass;
the traction device is an edge roller.
10. The float glass melting system is characterized by comprising a batching unit, a melting unit, a forming unit and an annealing unit which are sequentially connected according to a float glass production process route;
the forming unit comprising a float glass forming apparatus according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224350.0U CN210313992U (en) | 2019-07-31 | 2019-07-31 | Float glass forming device for improving utilization efficiency of protective gas and float glass melting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921224350.0U CN210313992U (en) | 2019-07-31 | 2019-07-31 | Float glass forming device for improving utilization efficiency of protective gas and float glass melting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255868A (en) * | 2019-07-31 | 2019-09-20 | 上海耀皮玻璃集团股份有限公司 | A kind of float glass forming arrangement and forming method improving protective gas utilization efficiency |
| CN113233736A (en) * | 2021-04-25 | 2021-08-10 | 中国建材国际工程集团有限公司 | Float glass melting furnace with contraction type clarification area |
-
2019
- 2019-07-31 CN CN201921224350.0U patent/CN210313992U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110255868A (en) * | 2019-07-31 | 2019-09-20 | 上海耀皮玻璃集团股份有限公司 | A kind of float glass forming arrangement and forming method improving protective gas utilization efficiency |
| CN110255868B (en) * | 2019-07-31 | 2024-04-02 | 上海耀皮玻璃集团股份有限公司 | Float glass forming device and forming method for improving utilization efficiency of shielding gas |
| CN113233736A (en) * | 2021-04-25 | 2021-08-10 | 中国建材国际工程集团有限公司 | Float glass melting furnace with contraction type clarification area |
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