Temperature fine adjustment device for forming glass plate by down-drawing method

Abstract

The utility model discloses a temperature fine adjusting device for forming a glass plate by a down-drawing method, which comprises a temperature adjusting structure, a material channel is arranged on the temperature adjusting structure in a penetrating manner, a plurality of heating elements which are arranged in an array are oppositely arranged on two sides of the material channel on the temperature adjusting structure, and cooling structures are correspondingly arranged on the outer sides of the heating elements; when in use, the device is arranged above a shaping area, the strip-shaped molten glass passes through the material channel, the temperatures of all positions in the length direction and the width direction of the strip-shaped molten glass in the material channel are respectively controlled by independently controlling all the heating elements and all the cooling structures, the accuracy and the flexibility of overall and local temperature control are higher, and the production efficiency is improved. Waste of cold and heat sources can be effectively reduced, energy consumption can be reduced, and the energy utilization rate can be increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass plate forming, and in particular relates to a temperature fine adjustment device for a glass plate formed by a down-drawing method. Background Art

[0002] In the production process of down-drawn glass sheets, molten glass enters the molding area in a strip shape from top to bottom. The temperature on both sides of the strip of glass drops faster than that in the middle, and the fluidity is poor, resulting in thicker glass on both sides when the glass enters the molding area, which easily affects the quality of the finished product. Therefore, in order to make the glass enter the molding area with uniform thickness and quickly form, it is necessary to set a temperature control device above the molding area and near the molding area. By controlling the temperature of the glass, the fluidity of the glass can be changed, so that the thickness of the glass is more uniform when it enters the molding area.

[0003] At present, the temperature of the molten glass is generally controlled by cooling with cooling air in a heat equalizing box. Since the heat equalizing box is an open structure, the cooling air not only acts on the molten glass area that needs to be cooled, but also has an impact on other areas. The temperature of each position of the molten glass cannot be accurately controlled, and the ability to adjust the uniformity of the thickness of the molten glass is weak. However, with the continuous development of display technology, the quality requirements for glass plates are getting higher and higher, especially the uniformity of the thickness of glass plates. The method of cooling with cooling air in a heat equalizing box has become increasingly difficult to meet production needs. Chinese patent CN108911483A discloses a device for rapid and fine adjustment of the thickness of a glass plate formed by an overflow down-drawing method. The device divides the cooling air introduced into the equalizing box into several independently controllable parts by setting a plurality of cooling air ducts in the width direction of the strip of glass liquid, thereby achieving more precise control of the temperature at each position in the width direction of the strip of glass liquid; however, the device is difficult to accurately control the temperature in the length direction of the strip of glass liquid, and the accuracy and flexibility of temperature control are poor. In order to make the temperature change of the glass liquid smoother when passing through the device, the device is designed so that the area for the glass liquid to pass through gradually narrows from top to bottom, but this also causes a relatively serious waste of cold and heat sources at the upper end of the area. In addition, due to the obstruction of the gas in the cooling air duct in the device, the heating effect provided by the heating carrier is also poor, resulting in a low energy utilization rate of the device. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a temperature fine adjustment device for down-drawn glass sheets, so as to solve the technical problems of poor temperature control flexibility and low energy utilization rate of current temperature control devices, and to achieve the effect of improving temperature control capability and reducing energy consumption.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A temperature fine adjustment device for a down-drawn glass plate comprises a temperature adjustment structure, a material channel is provided through the temperature adjustment structure, a plurality of heating elements arranged in an array are provided on both sides of the material channel, and a refrigeration element or a cooling structure is provided correspondingly on the outer side of the heating element.

[0007] Furthermore, the temperature control structure includes two support frames arranged opposite to each other, with a spacing between the two support frames and the material channel formed by the spacing, and the heating elements on both sides of the material channel are respectively arranged on the two support frames; mounting frames are fixedly provided under the two support frames, with a spacing between the two mounting frames and the spacing forms a material outlet corresponding to the material channel, and the lower end of the support frame is hinged to the mounting frame so as to flip and adjust the angle between the two support frames.

[0008] Furthermore, the position on the support frame that is hinged to the mounting frame is also slidably connected to the mounting frame so as to move and adjust the distance between the two support frames.

[0009] Furthermore, a heating carrier corresponding to the heating element is arranged on the support frame, and the heating element is arranged in the heating carrier; a cooling carrier is connected to the outside of the heating carrier, and the cooling element or cooling structure is arranged in the cooling carrier.

[0010] Furthermore, the support frame is plate-shaped and is penetrated by mounting holes corresponding to the heating carriers one by one, and the heating carriers are mounted in the mounting holes.

[0011] Furthermore, the cooling carrier has a cooling structure inside, and the cooling structure includes a plurality of cooling air ducts arranged in an array inside the cooling carrier, and two ends of the cooling air ducts penetrate the outer side surface of the cooling carrier to form an air inlet interface and an air outlet interface respectively.

[0012] Furthermore, the heating element is an electric heating wire extending in an S shape and fully covering the heating carrier.

[0013] Furthermore, the sizes of the heating carrier and the mounting hole match, and sealing plates are respectively provided on both sides of the material channel on the mounting frame.

[0014] Furthermore, an observation port is provided on the sealing plate facing the material channel, a transparent baffle for closing the observation port is provided inside the observation port, and a cover plate for covering the observation port is movably provided on the outer surface of the sealing plate.

[0015] Furthermore, the heating carrier and the cooling carrier located on the same side of the material channel in the transverse direction are an integrated structure.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. The temperature fine adjustment device for the down-drawn glass sheet formed by the utility model can independently control each heating element and cooling structure, so as to realize the temperature control of each position in the length and width directions of the strip glass liquid in the material channel, and the accuracy and flexibility of the overall and local temperature control are high; the cooling structure is arranged on the outside of the heating element, which will not affect the heating effect of the heating element, and can control each heating element and cooling structure to run or stop according to the heating and cooling requirements, which can effectively reduce the waste of cold and heat sources, and is conducive to reducing energy consumption and improving energy utilization.

[0018] 2. The temperature fine adjustment device for the down-drawn glass plate of the utility model can adjust the vertical angle and the lateral spacing of the two support frames so that the device has a more flexible temperature adjustment capability to meet more temperature control requirements of actual production.

[0019] 3. The temperature fine adjustment device for the down-drawn glass sheet of the utility model, the support frame and the sealing plate form a circumferentially closed material channel, which can effectively reduce the influence of the surrounding environment on the temperature of the glass liquid, is conducive to reducing the energy consumption of the device and improving the accuracy of the control of the glass liquid temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view of the temperature fine adjustment device described in the embodiment;

[0021] Figure 2 for Figure 1 Schematic diagram of the cross section along AA;

[0022] Figure 3 is a schematic diagram of the interior of the heating carrier described in the embodiment;

[0023] Figure 4 A schematic diagram of two support frames flipped away from each other according to the embodiment;

[0024] Figure 5 A schematic diagram of two support frames moving away from each other according to the embodiment;

[0025] Figure 6 This is a first exemplary diagram of the sliding hinge connection between the support frame and the mounting frame according to the embodiment;

[0026] Figure 7 A second exemplary diagram of the sliding hinge connection between the support frame and the mounting frame according to the embodiment;

[0027] Figure 8 A side view of the cooling carrier according to the embodiment;

[0028] Fig. 9 is a schematic diagram of the interior of the cooling carrier described in the embodiment;

[0029] Fig.10It is a schematic diagram of the structure of the support frame and the mounting frame described in the embodiment;

[0030] Fig.11 It is a structural schematic diagram of a sealing plate on a mounting frame according to an embodiment;

[0031] Among them, the heating carrier 1, the heating element 11, the material channel 2, the strip glass liquid 3, the cooling carrier 4, the cooling air duct 42, the air inlet interface 43, the air outlet interface 44, the air pipe 45, the support frame 5, the mounting hole 51, the outer frame 52, the partition 53, the first rotating shaft 54, the first locking nut 55, the mounting frame 6, the slide groove 61, the telescopic plate 62, the locking bolt 63, the second rotating shaft 64, the second locking nut 65, the sealing plate 7, the transparent baffle 71, the cover plate 72, and the traction roller 8. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0033] Example:

[0034] See also Figure 1 , Figure 2 and Figure 3 A temperature fine adjustment device for a down-drawn glass sheet includes a temperature adjustment structure, a material channel 2 is provided through the temperature adjustment structure, a plurality of heating elements 11 arranged in an array are provided on both sides of the material channel 2, and a refrigeration element or a cooling structure is provided on the outer side of the heating element 11.

[0035] When the utility model is used, it is installed on the traction roller 8, that is, above the shaping area, so that the strip glass liquid 3 passes through the material channel 2, and the temperature of each position of the strip glass liquid 3 in the length and width directions in the material channel 2 is controlled separately by independently controlling each heating element 11, each cooling element or cooling structure, so that the overall and local temperature control is more accurate and flexible; the cooling element or cooling structure is arranged outside the heating element 11, which not only has no effect on the heating element 11 heating the strip glass liquid 3 in the material channel 2, but also shortens the distance between the heating element 11 and the material channel 2, improves the heat transfer efficiency, and is conducive to improving the heating effect. Even if the cooling structure adopts the cooling air duct 42 to cooperate with the cooling air to achieve cooling, it will not affect the heating effect of the heating element 11. When the utility model is used, each heating element 11 and the cooling element or cooling structure can be controlled to run or stop according to the heating and cooling requirements. For example, in order to make the glass liquid heat up more smoothly when passing through the device, the number of heating elements 11 running at each vertical height can be controlled to gradually increase from top to bottom, which can effectively reduce the waste of cold and heat sources, and is conducive to reducing energy consumption and improving energy utilization.

[0036] See also Figure 1 and Figure 2 The temperature control structure includes two supporting frames 5 arranged opposite to each other, with a spacing between the two supporting frames 5 and the material channel 2 formed by the spacing, and the heating elements 11 on both sides of the material channel 2 are respectively arranged on the two supporting frames 5; mounting frames 6 are respectively fixedly provided under the two supporting frames 5, with a spacing between the two mounting frames 6 and the spacing forms a material outlet corresponding to and communicating with the material channel 2, and the lower end of the supporting frame 5 is hinged to the mounting frame 6 so as to flip and adjust the angle between the two supporting frames 5.

[0037] In this way, Figure 4 As shown, by adjusting the vertical angle of the two support frames 5, the device can have a more flexible temperature adjustment capability on the basis of independently controlling each heating element 11, so as to meet more temperature control requirements of actual production; for example, when the temperature of the glass liquid needs to be increased by a small amount before entering the shaping area, and in the device with limited vertical height, it is difficult to make the temperature of the glass liquid change smoothly by controlling the number of heating elements 11 running at each vertical height to gradually increase from top to bottom, the upper ends of the two support frames 5 can be flipped to move away from each other, even if the two support frames 5 are adjusted from a parallel state with a vertical angle of zero to a state with a certain angle, the distance between the heating elements 11 on the support frames 5 and the glass liquid is gradually reduced from top to bottom, thereby further controlling the heating effect of the heating elements 11 at various locations on the support frames 5 on the glass liquid, and on the premise of reducing energy consumption as much as possible and ensuring energy utilization, the device can make the glass liquid smoothly increase or decrease in temperature with a smaller amplitude, obtain a more flexible temperature adjustment capability, and meet more temperature control requirements.

[0038] See also Figure 2 The position where the support frame 5 is hinged with the mounting frame 6 is also slidably connected to the mounting frame 6 so as to move and adjust the distance between the two support frames 5; in this way, in addition to adjusting the vertical angle between the two support frames 5, as Figure 5 As shown, the lateral spacing between the two support frames 5 can also be directly adjusted, and the temperature adjustment capability of the device can be further improved by coordinating the heating elements 11, cooling elements or cooling structures that control the height and width positions.

[0039] During implementation, in order to realize the hinged and sliding connection between the support frame 5 and the mounting frame 6, the following method can be adopted: Figure 6The structure shown in the figure is that the mounting frame 6 has slide grooves 61 extending inward from both sides respectively, the length direction of the slide grooves 61 corresponds to the width direction of the material channel 2, the lower end of the support frame 5 is located between the two slide grooves 61, and the lateral protrusions on both sides of the support frame 5 are formed with a first rotating shaft 54 ​​with a diameter matching the width of the slide groove 61. The first rotating shaft 54 ​​is located in the slide groove 61 and can rotate in the slide groove 61 and slide along its length direction. The first rotating shaft 54 ​​is connected to the outer side of the mounting frame 6 with a first locking nut 55, which can be tightened against the outer side of the mounting frame 6 by screwing the first locking nut, thereby locking the support frame 5 to rotate and slide; or adopting a locking mechanism such as Figure 7 The structure shown, that is, a slide groove is provided on the side of the mounting frame 6 facing the material channel 2, and the slide groove extends along the width direction of the material channel 2. A telescopic plate 62 is slidably provided in the slide groove, and the telescopic plate 62 can slide along the slide groove. One end of the telescopic plate 62 facing the material channel 2 is located outside the slide groove, and second rotating shafts 64 are respectively raised on both sides of the lateral side. The lower end of the support frame 5 is raised on both sides of the telescopic plate 62 to form a connecting portion, and the second rotating shaft 64 movably passes through the connecting portion on the corresponding side. A second locking nut 65 is connected to the second rotating shaft 64 on the outside of the connecting portion. The mounting frame 6 is provided with a locking bolt 63, the end face of which extends into the slide groove and abuts against the upper surface of the telescopic plate 62. The second rotating shaft 64 and the locking bolt 63 can be tightened respectively, thereby respectively realizing the locking of the support frame 5 for rotation and sliding.

[0040] See also Figure 3 , a heating carrier 1 corresponding to the heating element 11 is disposed on the support frame 5, and the heating element 11 is disposed in the heating carrier 1; see Figure 8 and Fig. 9 The outside of the heating carrier 1 is connected to a cooling carrier 4, and the refrigeration element or cooling structure is arranged in the cooling carrier 4; in this way, each heating element 11 exists in an independent heating carrier 1, and each refrigeration element or cooling structure exists in an independent cooling carrier 4, which is not only convenient for later maintenance and replacement, but also can reduce the temperature influence between the heating elements 11 and the temperature influence between the refrigeration elements or cooling structures, which is conducive to improving the accuracy and flexibility of the temperature control of the device.

[0041] See also Figure 1 and Figure 3 The support frame 5 is plate-shaped and has mounting holes 51 that correspond to the heating carrier 1. The heating carrier 1 is installed in the mounting holes 51. The sizes of the heating carrier 1 and the mounting holes 51 match each other. Fig.10In this embodiment, the support frame 5 includes a rectangular outer frame 52, and the inner side of the outer frame 52 is formed by a plurality of partitions 53 evenly spaced along the length and width of the outer frame 52 to form the plurality of mounting holes 51; in this way, the inner side of the heating carrier 1 is connected with the material channel 2 or directly forms the side wall of the material channel 2, which is conducive to reducing the heat transfer loss of the heating element 11, the cooling element or the cooling structure, and is conducive to improving the energy utilization rate and temperature control sensitivity of the device. Furthermore, the heating element 11 is an electric heating wire extending in an S shape and fully covering the heating carrier 1; in this way, the temperature of the heating carrier 1 is more uniform, which is conducive to achieving accurate control of the glass liquid temperature.

[0042] See also Figure 8 and Fig. 9 The cooling carrier 4 has a cooling structure inside, and the cooling structure includes a plurality of cooling air ducts 42 arranged in an array inside the cooling carrier 4. The two ends of the cooling air duct 42 penetrate the outer side surface of the cooling carrier 4 to form an air inlet interface 43 and an air outlet interface 44 respectively. Figure 2 The air inlet interface 43 and the air outlet interface 44 are respectively connected to an air pipe 45 for inputting and outputting cooling gas; in this way, by evenly arranging multiple cooling air ducts 42 in the cooling carrier 4 and introducing cooling air through independent air inlet interfaces 43 and air outlet interfaces 44, the area that can provide cooling effect can be further reduced by the size of the cooling carrier 4, so that the device has more flexible and more precise temperature control capabilities.

[0043] See also Fig.11 , sealing plates 7 are respectively provided on the mounting frame 6 on both sides of the material channel 2; the two sealing plates 7 are vertically arranged and horizontally opposite to each other, the sealing plates 7 are at the same height as the supporting frame 5, and the inner sides of the sealing plates 7 are respectively sealed and abutted against the end faces of the two supporting frames 5; in this way, when the glass liquid passes through the device, the influence of the surrounding environment on the temperature of the glass liquid can be effectively reduced, which is beneficial to reducing the energy consumption of the device and improving the accuracy of controlling the temperature of the glass liquid.

[0044] See also Fig.11 , an observation port is provided on the sealing plate 7 facing the material channel 2, a transparent baffle 71 is provided in the observation port to close the observation port, and a cover plate 72 which can cover the observation port is movably provided on the outer surface of the sealing plate 7; in this way, during the debugging process, the cover plate 72 can be opened to observe the flow and thickness change of the glass liquid through the transparent baffle 71, and during production, the cover plate 72 can be closed to reduce the influence of the surrounding environment on the temperature of the glass liquid through the transparent baffle 71; Fig.11 As shown, the cover plate 72 is vertically divided into a plurality of plate sections that can be opened or slid independently, so that the plate section to be opened can be flexibly selected according to observation requirements, thereby further reducing the impact on the glass liquid temperature during the observation process.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A temperature fine adjustment device for a down-drawn glass sheet, characterized in that: It comprises a temperature regulating structure, a material channel is provided through the temperature regulating structure, a plurality of heating elements arranged in an array are provided on both sides of the material channel, and a refrigeration element or a cooling structure is provided correspondingly on the outer side of the heating element.

2. The device for finely adjusting the temperature of a down-drawn glass sheet according to claim 1, characterized in that: The temperature control structure includes two supporting frames arranged opposite to each other, with a spacing between the two supporting frames and the material channel formed by the spacing, and the heating elements on both sides of the material channel are respectively arranged on the two supporting frames; mounting frames are fixedly provided under the two supporting frames, with a spacing between the two mounting frames and the spacing forms a material outlet corresponding to the material channel, and the lower end of the supporting frame is hinged to the mounting frame so as to flip and adjust the angle between the two supporting frames.

3. The temperature fine adjustment device for down-drawn glass sheet according to claim 2, characterized in that: The position on the support frame that is hinged to the mounting frame is also slidably connected to the mounting frame so as to move and adjust the distance between the two support frames.

4. The device for finely adjusting the temperature of a down-drawn glass sheet according to claim 2, characterized in that: The support frame is provided with a heating carrier corresponding to the heating element one by one, and the heating element is arranged in the heating carrier; the outer side of the heating carrier is connected with a cooling carrier, and the cooling element or cooling structure is arranged in the cooling carrier.

5. The temperature fine adjustment device for down-drawn glass sheet according to claim 4, characterized in that: The support frame is plate-shaped and is penetrated by mounting holes corresponding to the heating carriers one by one, and the heating carriers are mounted in the mounting holes.

6. The temperature fine adjustment device for a down-drawn glass sheet according to claim 4, characterized in that: The cooling carrier has a cooling structure inside, and the cooling structure includes a plurality of cooling air ducts arranged in an array inside the cooling carrier. Two ends of the cooling air ducts penetrate the outer side surface of the cooling carrier to form an air inlet interface and an air outlet interface respectively.

7. The temperature fine adjustment device for a down-drawn glass sheet according to claim 4, characterized in that: The heating element is an electric heating wire which extends in an S shape and fully covers the heating carrier.

8. The device for finely adjusting temperature of a down-drawn glass sheet according to claim 5, characterized in that: The sizes of the heating carrier and the mounting hole match each other, and sealing plates are respectively arranged on both sides of the material channel on the mounting frame.

9. The device for finely adjusting temperature of a down-drawn glass sheet according to claim 8, characterized in that: An observation port is provided on the sealing plate facing the material channel, a transparent baffle for closing the observation port is provided inside the observation port, and a cover plate for covering the observation port is movably provided on the outer surface of the sealing plate.

10. The temperature fine adjustment device for a down-drawn glass sheet according to claim 1, characterized in that: The heating carrier and the cooling carrier located on the same side of the material channel in the transverse direction are an integrated structure.

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