Glass tape vertical down-drawing molding loading device

Abstract

The utility model relates to a glass tape vertical pull-down forming material loading device which comprises a cavity body, the cavity body comprises a middle part, a lower part which is gradually reduced downwards in the thickness direction of a formed glass tape, and a discharging nozzle part of which the bottom end of the lower part is in a slit shape; the structure is characterized in that a connecting port part is formed at the upper end of a circle of side vertical surface in the middle, and the connecting port part is in chamfered transition connection with the peripheral edge of the upper sealing plate, so that the inner cavity space of the cavity body at the position is reduced; and the upper sealing plate is provided with an opening and is communicated with the feeding pipe. The middle part of the chamber body is in transition connection with the drainage part through the upper sealing plate and the chamfer, so that the space of the inner cavity of the chamber body is reduced, the dead angle of fluid at the upper part of the chamber body is reduced, a glass liquid flowing cavity is reduced, the volume fluctuation change of the flowing cavity is small, and the flow and temperature stability of the glass liquid flowing out of the discharging nozzle part is improved; the glass tape is prevented from generating cold and hot stripes and bubbles, the thickness range consistency is guaranteed, and the quality of the produced glass tape is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of glass manufacturing and forming in chemistry and metallurgy, and specifically relates to a glass strip vertical pull forming material carrier device. Background Technology

[0002] Glass sheets produced by slit-drawing and vertical rolling processes are formed by a slit constrained by a platinum-made material carrier. The material carrier typically comprises a square chamber body; see attached diagram. Figure 1 and Figure 2 The chamber body comprises, from top to bottom, a central section 3 with a relatively large inner cavity, a lower section 5 whose inner cavity gradually decreases in the glass thickness direction (width direction of the chamber body), and a discharge nozzle 4 whose inner cavity at the bottom of the lower section is a slit. Functionally, these correspond to the glass melt buffer zone, the glass melt transition zone, and the glass melt outflow zone, respectively. The top of the central section 3 is connected to a feed pipe 1 via a top section 2 whose inner cavity gradually decreases upwards. The feed pipe 1 is connected to the middle position of the top section 2. The inner cavity of the top section 2 gradually decreases from the periphery connected to the central section 3 of the chamber body towards the middle position connected to the feed pipe 1, forming a frustum-shaped quadrangular pyramid. Nickel bars for heating are connected to the outer wall of the chamber body. These nickel bars are installed on both sides along the length of the chamber body, making point contact with the outer wall. They heat the chamber body through point heat conduction, forming an internal temperature field within the chamber body and slowing down the temperature drop of the internal glass melt.

[0003] In use, the high-temperature molten glass from the previous process enters through the feed pipe 1, passes through the top 2 and enters the middle 3 of the chamber body for buffering, passes through the lower 5 for transition, and then flows out in a strip shape from the discharge nozzle 4. The outflowing molten glass is expanded by the edge-pulling machine 11 located below the chamber body of the material carrier device, and after expansion, it is squeezed by the edge roller 9 to form a glass strip 10.

[0004] During the formation of the glass strip, the flow rate and temperature stability of the molten glass flowing out from the slit-shaped nozzle 4 are key factors affecting the quality of the formed glass strip and the consistency of its thickness variation. The high-temperature molten glass has a certain viscosity. In the middle 3 and lower 5 of the chamber, it adheres closely to the wall with minimal flow and creates cavities. However, as it enters from the feed pipe 1, passes through the top 2, and enters the middle 3, the molten glass has difficulty flowing quickly to the corners where the top 2 and middle 3 connect, creating flow cavities. Fluctuations in the volume of these flow cavities affect the flow rate and temperature stability of the molten glass flowing out from the nozzle 4, thus influencing the internal temperature field of the chamber. This can easily lead to hot and cold streaks and bubbles in the glass strip, affecting the consistency of its thickness variation and reducing the quality of the produced glass strip. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a glass ribbon vertical pull forming material carrier device, which avoids the problem of poor stability of the flow rate and temperature of the glass liquid flowing out of the outlet when the current material carrier device is used, and achieves the effect of improving stability and improving the quality of glass ribbon production.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A glass ribbon vertical pull forming material carrier device includes a chamber body, which includes a middle part, a lower part that gradually decreases in thickness direction of the formed glass ribbon, and a slit-shaped discharge nozzle at the bottom end of the lower part; a connecting port is formed at the upper end of a ring of side facades of the middle part, and the connecting port is connected to the four perimeters of the upper sealing plate at a chamfered angle to reduce the internal space of the chamber body at this position; the upper sealing plate has an opening and communicates with the feed pipe.

[0008] To further improve the above technical solution, the feed pipe is connected to the opening on the upper sealing plate through a downwardly expanding drainage section.

[0009] Furthermore, the drainage section is connected to the middle part of the upper sealing plate.

[0010] Furthermore, the vertical inclination angle of the chamfered transition between the connecting opening and the edge of the upper sealing plate is 40° to 60°, and the length of the vertical right-angle side of the chamfered transition is 1 / 4 to 1 / 3 of the height of the middle side facade.

[0011] Furthermore, an exhaust pipe is also connected to the upper sealing plate, and the exhaust pipe is equipped with an opening adjustment mechanism for controlling the amount of gas passing through the exhaust pipe.

[0012] Furthermore, the number of exhaust pipes is several, and they are evenly distributed circumferentially on the outside of the feed pipe.

[0013] Furthermore, the opening adjustment mechanism includes an adjustment shaft that rotates laterally through the wall of the exhaust pipe. The inner end of the adjustment shaft is synchronously rotated inside the exhaust pipe and connected to a baffle that is adapted to the inner hole of the exhaust pipe. The outer end of the adjustment shaft is synchronously rotated and connected to a drive unit.

[0014] Furthermore, in the width direction of the formed glass strip, heating structures are externally connected to both ends of the chamber body.

[0015] Furthermore, the heating structure includes an upper nickel busbar connected to both ends of the middle section and a lower nickel busbar connected to both ends of the lower section. The upper nickel busbar extends vertically and abuts against the outer wall of the middle section on one side facing the chamber body. Several vertically spaced heating connection holes are provided on the upper nickel busbar.

[0016] Furthermore, a drawing machine and a pressure roller are sequentially mounted below the discharge nozzle of the chamber body.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The glass ribbon vertical pull forming material carrier of this utility model has a middle part of the chamber body and the flow guide part connected by an upper sealing plate and a chamfer transition, which reduces the internal cavity space of the chamber body, thereby reducing the fluid dead zone in the upper part of the chamber body, reducing the flow cavity of glass liquid, and the volume fluctuation of the flow cavity is small. This improves the stability of the flow rate and temperature of the glass liquid flowing out from the outlet, avoids the generation of hot and cold stripes and bubbles in the glass ribbon, ensures the consistency of thickness difference, and improves the quality of the glass ribbon produced.

[0019] 2. The glass strip vertical pull forming material carrier of this utility model has an added exhaust pipe, which can be adjusted according to the actual real-time flow status of the glass melt to make its internal cavity area relatively balanced, reduce internal cavity fluctuations, and further improve the flow rate and temperature stability of the glass melt.

[0020] 3. The glass strip vertical pull forming material carrier of this utility model reduces the internal cavity space of the chamber body, which can reduce the amount of platinum-rhodium alloy used in the preparation of the chamber body and save costs.

[0021] 4. The glass strip vertical pull forming material carrier of this utility model optimizes the structure of the heated nickel busbar, and optimizes the heat conduction from point contact in the middle of the chamber body to line contact in the middle, which improves the problem of uneven heat conduction from the middle to the bottom of the original structure chamber body and ensures a constant internal temperature field. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a material loading device in the prior art;

[0023] Figure 2 for Figure 1 Side view;

[0024] Figure 3 This is a side view of the glass ribbon vertical pull-down forming material carrier device according to a specific embodiment;

[0025] Figure 4 This is a schematic diagram for simulation comparison;

[0026] Figure 5 This is a separate schematic diagram of the exhaust pipe in the embodiment;

[0027] Figure 6 This is a comparative diagram showing the flow rate fluctuations when the power is the same.

[0028] Figure 7 This is a comparative diagram showing the temperature fluctuations within the same power range.

[0029] Among them, there is a feed pipe 1, a top part 2, a diversion part 21, a middle part 3, an upper sealing plate 31, a discharge nozzle part 4, a lower part 5, an upper nickel bar 601, a lower nickel bar 602, an exhaust pipe 7, an adjusting shaft 702, a baffle 704, molten glass 8, an edge roller 9, a glass belt 10, and an edge pulling machine 11. Detailed Implementation

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0031] See Figure 3 The glass ribbon vertical pull forming material carrier device of a specific embodiment includes a square chamber body. The chamber body includes a middle part 3, a lower part 5 that gradually decreases in thickness direction (i.e., width direction of the chamber body) of the formed glass ribbon, and a discharge nozzle 4 with a slit-like bottom end of the lower part 5. The middle part 3, the lower part 5, and the discharge nozzle 4 are vertically connected in sequence. A connecting port is formed at the upper end of a ring of side facades of the middle part 3. A horizontal upper sealing plate 31 is sealed to the connecting port. The upper end of the ring of side facades (i.e., the connecting port) is connected to the four perimeters of the upper sealing plate 31 at a chamfered angle to reduce the internal cavity space of the chamber body at this position. The upper sealing plate 31 has an opening and is connected to the feed pipe 1.

[0032] In the glass ribbon vertical pull-down forming material carrier device of this embodiment, the middle part 3 of the chamber body and the feed pipe 1 are connected by an upper sealing plate 31 and a chamfered transition, reducing the internal cavity space of the chamber body and thus reducing the fluid dead zone in the upper part of the chamber body. (See reference...) Figure 1 and Figure 4 , Figure 4 The red box in the middle represents this device. It can be seen that this device can reduce the flow cavity of the glass melt, and the volume fluctuation of the flow cavity is small. This improves the stability of the flow rate and temperature of the glass melt flowing out from the discharge nozzle 4, avoids the generation of hot and cold stripes and bubbles in the glass ribbon, ensures the consistency of thickness difference, and improves the quality of the glass ribbon produced.

[0033] Please continue reading Figure 3 The feed pipe 1 is connected to the opening on the upper sealing plate 31 through a downwardly expanding drainage section 21; the drainage section 21 is in the shape of an inverted funnel and is connected to the middle position of the upper sealing plate 31.

[0034] In this way, the downwardly expanding drainage section 21 and the chamfered transition between the connecting port and the upper sealing plate 31 form a two-stage structural layer for the free downward flow and diffusion of molten glass. This better utilizes the internal space of the chamber body and reduces the cavities for molten glass flow, ensuring and enhancing the aforementioned effects. Specifically, the drainage section 21 can be selected as a hollow frustum shape to match the initial state of the free downward flow and diffusion of molten glass.

[0035] Among them, the vertical tilt angle ∠ is the angle at which the connecting opening transitions with the chamfered edge of the upper sealing plate 31. θ The angle is 40° to 60°, and the length of the vertical right-angle side of the chamfered transition is 1 / 4 to 1 / 3 of the height of the side facade of the middle section 3. In this embodiment, the vertical inclination angle of the chamfered transition between the connecting opening and the edge of the upper sealing plate 31 is selected as 45°, and the length of the vertical right-angle side of the chamfered transition is 1 / 3 of the height of the side facade of the middle section 3. This can ensure the effect of the glass melt diffusion corresponding to the structural layers. In implementation, for different preparation objects, the material carrier can be adaptively adjusted according to the viscosity and temperature of the glass melt to ensure effective space utilization.

[0036] Please continue reading Figure 3 The upper sealing plate 31 is also connected to an exhaust pipe 7, and the exhaust pipe 7 is equipped with an opening adjustment mechanism for controlling the amount of gas passing through the exhaust pipe 7.

[0037] In this way, adding an exhaust pipe 7 allows for adjustments based on the actual real-time flow status of the molten glass, ensuring a relatively balanced internal cavity region, reducing internal cavity fluctuations, and further improving the stability of the molten glass flow rate and temperature. The number of exhaust pipes 7 is several, preferably two to four, evenly distributed circumferentially on the outside of the feed pipe 1, enabling more timely and balanced adjustment.

[0038] See Figure 5 Specifically, the opening adjustment mechanism includes an adjustment shaft 702 that rotates laterally through the wall of the exhaust pipe 7. The inner end of the adjustment shaft 702 is synchronously connected to a baffle 704 that fits the inner hole of the exhaust pipe 7 within the exhaust pipe 7. The outer end of the adjustment shaft 702 is synchronously connected to a drive unit (not shown in the figure). In implementation, it can be manually driven or connected to a controller. The controller, based on the state of the molten glass, controls the adjustment shaft 702 to rotate and adjust in real time.

[0039] Please continue reading Figure 3 In the width direction of the formed glass strip, heating structures are externally connected to both ends of the chamber body. The heating structure includes an upper nickel bar 601 connected to both ends of the middle part 3 and a lower nickel bar 602 connected to both ends of the lower part 5. The upper nickel bar 601 extends vertically and abuts against the outer wall of the middle part 3 on the side facing the chamber body. Several vertically spaced heating connection holes are opened on the upper nickel bar 601.

[0040] In this way, the structure of the heating nickel busbar is optimized, changing the heat conduction from three points of contact in the middle of the chamber body to a whole-line contact heat conduction in the middle three parts. This improves the problem of uneven heat conduction from the middle three parts to the lower five parts of the original structure chamber body, and ensures a constant internal temperature field.

[0041] When using this solution, the rolling process of the molten glass is similar to that of existing technologies, and can be referred to accordingly. Figure 1 , Figure 2Below the discharge nozzle 4 of the chamber body, a straightening machine 11 and a pressure roller are sequentially mounted. The pressure roller can be used with two side rollers 9 (double rollers) or with one side roller 9 and a platform (single roller with platform). Molten glass from the upper section continuously enters the loading device through the feed pipe 1, is buffered in the middle 3 of the loading device, transitions in the lower 5 of the loading device, and finally flows out from the discharge nozzle 4 of the loading device. The flowing molten glass is expanded by the straightening machine 11, and then output by the pressure roller 9 to form a glass ribbon 10. Figure 3 As shown, the gas generated inside the material carrier can be discharged through the upper exhaust pipe 7. The exhaust pipe 7 adjusts the gas inside the material carrier, maintaining a relatively balanced state in its internal cavity area. This stabilizes the flow rate and temperature of the molten glass flowing from the outlet 4, reducing the likelihood of hot and cold streaks and bubbles, and improving output quality. See also... Figure 6 and Figure 7 Correspondingly, under the same output quality, power output can be reduced, achieving energy saving and emission reduction effects.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A glass ribbon vertical pull forming material carrier device, comprising a chamber body, the chamber body including a middle part, a lower part that gradually decreases in thickness direction of the formed glass ribbon, and a discharge nozzle with a slit-like bottom end of the lower part; characterized in that: The upper end of the central side facade forms a connection port, which is connected to the four perimeter of the upper sealing plate at a chamfered angle to reduce the internal space of the chamber body at this position. The upper sealing plate has an opening and is connected to the feed pipe.

2. The glass ribbon vertical pull forming material carrier device according to claim 1, characterized in that: The feed pipe is connected to the opening on the upper sealing plate through a downwardly expanding drainage section.

3. The glass ribbon vertical pull forming material carrier device according to claim 2, characterized in that: The drainage section is connected to the middle part of the upper sealing plate.

4. The glass ribbon vertical pull forming material carrier device according to claim 3, characterized in that: The vertical inclination angle of the chamfered transition between the connecting opening and the edge of the upper sealing plate is 40° to 60°, and the length of the vertical right-angle side of the chamfered transition is 1 / 4 to 1 / 3 of the height of the middle side facade.

5. The glass ribbon vertical pull forming material carrier according to any one of claims 1-4, characterized in that: The upper sealing plate is also connected to an exhaust pipe, which is equipped with an opening adjustment mechanism for controlling the amount of gas passing through the exhaust pipe.

6. The glass ribbon vertical pull forming material carrier according to claim 5, characterized in that: The number of exhaust pipes is several, and they are evenly distributed circumferentially on the outside of the feed pipe.

7. The glass ribbon vertical pull forming material carrier device according to claim 5, characterized in that: The opening adjustment mechanism includes an adjustment shaft that rotates laterally through the wall of the exhaust pipe. The inner end of the adjustment shaft is synchronously connected to a baffle that matches the inner hole of the exhaust pipe, and the outer end of the adjustment shaft is synchronously connected to a drive unit.

8. The glass ribbon vertical pull forming material carrier device according to claim 1, characterized in that: Heating structures are externally connected to both ends of the chamber body in the width direction of the formed glass strip.

9. The glass ribbon vertical pull forming material carrier according to claim 8, characterized in that: The heating structure includes an upper nickel busbar connected to both ends of the middle section and a lower nickel busbar connected to both ends of the lower section. The upper nickel busbar extends vertically and abuts against the outer wall of the middle section on one side facing the chamber body. Several vertically spaced heating connection holes are opened on the upper nickel busbar.

10. The glass ribbon vertical pull forming material carrier according to claim 1, characterized in that: Below the discharge nozzle of the chamber body, a stripping machine and a pressure roller are sequentially mounted.

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