Cofferdam structure and channel structure for improving clarification quality of molten glass

Abstract

The utility model discloses a cofferdam structure and channel structure for improving the clarification quality of molten glass, which comprises a flow dividing weir arranged on the inner side of a platinum channel and a blocking weir arranged on the inner side of the platinum channel, and the cross section of the flow dividing weir is in a shape similar to a water drop. The water-drop-like shape comprises a first flow-dividing weir edge, a second flow-dividing weir edge, a first flow-dividing weir edge end and a second flow-dividing weir edge end, the first flow-dividing weir edge is a straight line, the second flow-dividing weir edge is arc-shaped, the first flow-dividing weir edge end is semicircular, and the second flow-dividing weir edge end is in arc-shaped transition connection with the second flow-dividing weir edge; the cross section of the blocking weir comprises a first blocking weir edge and a second blocking weir edge, the first blocking weir edge is in a circular arc shape in the space, the blocking weir is of a structure similar to an annular body, the whole blocking weir is bent in the horizontal direction, projections of the upper surface and the lower surface of the blocking weir coincide, and the surface where the second blocking weir edge is located is in arc transition connection with the annular surface where the first blocking weir edge is located. And the annular surface of the retaining weir clings to the inner side surface of the platinum channel. The utility model can solve the problems that the residence time of molten glass is short, and bubbles cannot be discharged in time, so that bubble defects are caused.

Description

Technical Field

[0001] The utility model belongs to the field of substrate glass manufacturing, and in particular relates to a cofferdam structure and a channel structure for improving the clarification quality of glass liquid. Background Art

[0002] TFT-LCD substrate glass is a key material in the panel industry. During the production process, there are extremely high requirements for the internal quality of substrate glass, among which bubbles are one of the most critical defect control indicators. The production process of substrate glass mainly includes kiln melting, channel clarification, stirring and homogenization, and overflow pull-down. During the kiln melting process, a large number of bubbles will be generated inside the glass liquid, so the elimination of bubbles is crucial to the production of substrate glass.

[0003] Channel clarification is an important step in eliminating bubbles in the glass liquid during the production process of substrate glass. The current mainstream clarification process is to heat the glass liquid through channel self-heating. In the process of flowing through the channel, the bubbles inside the glass liquid are discharged after polymerization and floating. This process is to control the temperature so that the bubbles are discharged under natural conditions. As the substrate glass develops towards high-generation and large-size directions, the lead-out amount will be greatly increased, and the flow rate of the glass liquid in the channel will increase, that is, the residence time will be shortened, which will make the glass liquid degassing effect worse, and a large number of bubbles cannot be discharged in time, thus causing bubble defects.

[0004] At present, in the case of large lead-out volume, the clarification quality is generally improved by increasing the clarification temperature or extending the channel length, which will increase the volatilization of the platinum channel at high temperature, further weaken the strength, and shorten the service life of the channel. In addition, since the material of the platinum channel is a precious metal, extending the channel length will also greatly increase the construction cost of the substrate glass line. Utility Model Content

[0005] The utility model provides a cofferdam structure and a channel structure for improving the clarification quality of glass liquid, so as to solve the problem that the glass liquid has a short retention time and bubbles cannot be discharged in time, thus causing bubble defects.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cofferdam structure for improving the clarification quality of glass liquid, comprising a diverter weir arranged inside a platinum channel and a retaining weir arranged inside the platinum channel, wherein the cross section of the diverter weir is similar to a water drop shape, and the water drop shape comprises: a first diverter weir edge, a second diverter weir edge, a first diverter weir edge end, and a second diverter weir edge end, the first diverter weir edge is a straight line, the second diverter weir edge is an arc, the first diverter weir edge end is a semicircle, and the second diverter weir edge end is an arc transitionally connected to the second diverter weir edge;

[0008] The cross section of the weir includes: a first weir edge and a second weir edge, and the first weir edge is arc-shaped in space, the weir is a ring-shaped structure, the weir is bent in the horizontal direction as a whole, the projections of the upper and lower surfaces of the weir overlap, and the surface where the second weir edge is located is connected to the annular surface where the first weir edge is located in an arc-shaped transition, and the annular surface of the weir is installed close to the inner surface of the platinum channel.

[0009] Furthermore, the length of the first diversion weir edge is 100 mm to 150 mm, and the diameter of the first diversion weir edge end is 2 mm to 8 mm.

[0010] Furthermore, the thickness of the retaining weir is 2 mm to 8 mm, and the curvature of the first retaining weir edge is

[0011] A channel structure for improving the clarification quality of glass liquid, based on the cofferdam structure, comprises: a channel, a flange and a plurality of the cofferdam structures, the flanges are installed at both ends of the channel, and the cofferdam structure is arranged inside the channel;

[0012] The cofferdam structure includes a diverter weir and a retaining weir. The upper surface and the lower surface of the diverter weir are respectively connected closely to the inner surface of the channel, and the annular surface of the retaining weir is installed closely to the inner surface of the platinum channel.

[0013] The line between the ends of the second diverter weir edges on the upper and lower surfaces of the diverter weir and the plane defined by the second weir edges in the upper and lower surfaces of the weir are perpendicular to the cross-section of the channel, and the farthest ends of the second diverter weir edges and the plane defined by the second weir edges in the upper and lower surfaces of the weir are spatially flush.

[0014] Furthermore, the angle between the extension line of the first diverter weir edge in the diverter weir and the center line of the channel is 30° to 60°.

[0015] Furthermore, the distance between the geometric center of the diverter weir and the geometric center of the retaining weir is 100 mm to 200 mm.

[0016] Furthermore, the first retaining dam edge is in an arc shape, and its radius is 150 mm to 200 mm.

[0017] Furthermore, a cofferdam structure is arranged on the adjacent side of the flange, and at least two cofferdam structures are arranged in the channel and the number of the cofferdam structures is an even number.

[0018] Furthermore, the cofferdam structure is a solid structure and is made of platinum-rhodium alloy.

[0019] A method for installing a channel structure for improving the clarification quality of glass liquid is applied to the channel structure, comprising the following steps:

[0020] The channel itself includes a multi-section channel structure, a cofferdam structure is first welded inside the multi-section channel structure, and then the multi-section channel structure is welded to form a channel;

[0021] Welds are formed between the multi-section channel structures.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides a cofferdam structure for improving the clarification quality of glass liquid, comprising a diversion weir and a retaining weir arranged on the inner side of a platinum channel, which can change the flow direction of the glass liquid after being diverted in the channel, generate backflow and eddy currents, extend the retention time of the glass liquid in the channel, and improve the clarification effect of the glass liquid; at the same time, the generation of eddy currents causes the glass liquid to collide inside the channel, which is beneficial to the rapid discharge of bubbles at the bottom of the glass liquid, and prevents the bubbles from adhering to the channel wall, further improving the clarification effect of the glass liquid.

[0024] The utility model provides a channel structure for improving the clarification quality of glass liquid. First, the glass liquid flows in the channel, and then the glass liquid is diverted after passing through the diverting weir. As the space through which the diverting flows becomes smaller and the flow rate increases, multiple diverting flows collide after changing directions under the action of the retaining weir, thereby generating eddy currents. Finally, high-quality clarification of the glass liquid is achieved in multiple groups of cofferdam structures. A cofferdam structure is arranged in the channel structure, and the diverting weir and retaining weir in the cofferdam structure are both arranged longitudinally, which improves the high-temperature strength of the platinum channel as a whole and effectively prevents the high-temperature collapse of the top of the channel. At the same time, multiple cofferdam structures are arranged in the channel structure, which can change the flow direction of the glass liquid after the channel is diverted under the action of the diverting weir and retaining weir, generate backflow and eddy currents, and mix the glass liquids at different positions of the channel with each other, thereby improving the homogenization effect of the glass liquid in the channel.

[0025] Furthermore, the cofferdam structure is arranged near the flange of the channel, which strengthens the strength of the flange root and can effectively prevent the root from cracking and collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional schematic diagram of a channel structure for improving the clarification quality of glass liquid provided by the utility model;

[0027] Figure 2 A front view of a channel structure for improving the clarification quality of molten glass provided by the utility model;

[0028] Figure 3 A cross-sectional view of a channel structure for improving the clarification quality of glass liquid provided by the utility model;

[0029] Figure 4 A schematic diagram of the flow of glass liquid in the channel provided by the utility model;

[0030] Figure 5 (a) is a schematic cross-sectional view of the diverter weir provided by the utility model;

[0031] Figure 5 (b) is a schematic cross-sectional view of the retaining weir provided by the utility model.

[0032] In the figure, 1, channel; 2, flange; 3, cofferdam structure; 3-1, diverter weir; 3-2, retaining weir; 3-11, first diverter weir edge; 3-12, second diverter weir edge; 3-13, first diverter weir edge end; 3-14, second diverter weir edge end; 3-21, first retaining weir edge; 3-22, second retaining weir edge; 4, weld; 5, channel centerline; 6, first diverter; 7, second diverter; 8, vortex. DETAILED DESCRIPTION

[0033] The following is a further detailed description of the present invention:

[0034] like Figure 1 As shown, a channel structure for improving the clarification quality of glass liquid includes a channel 1, a flange 2 and a cofferdam structure 3, wherein the cofferdam structure 3 includes a diverter weir 3-1 and a retaining weir 3-2, wherein the diameter of the channel 1 is 300 mm to 350 mm;

[0035] Specifically, the cross section of the diverter weir 3-1 is similar to a water drop shape, the first diverter weir edge 3-11 is a straight line with a length of 100mm to 150mm, the second diverter weir edge 3-12 is an arc, the first diverter weir edge end 3-13 is a semicircle with a diameter of 2mm to 8mm, and the second diverter weir edge end 3-14 is connected to the second diverter weir edge 3-12 in an arc transition;

[0036] The retaining weir 3-1 is similar to a ring-shaped structure in space, and its cross section consists of a first retaining weir edge 3-21 and a second retaining weir edge 3-22. The first retaining weir edge 3-21 is in an arc shape as a whole, and its radius is 150mm to 200mm. The curvature of the first retaining weir edge 3-21 is The thickness of the retaining weir 3-2 is 2 mm to 8 mm, and the surface where the second retaining weir edge 3-22 is located is connected to the surface where the first retaining weir edge 3-21 is located in an arc-shaped transition;

[0037] Specifically, the retaining weir 3 - 1 is slightly curved in the horizontal direction as a whole, and the upper surface and the lower surface of the retaining weir 3 - 1 are overlapped in a plan view.

[0038] The upper and lower ends of the diverter weir 3-1 (the upper and lower ends refer to the upper and lower surfaces of the diverter weir 3-1) are welded to the channel 1; one side of the retaining weir 3-2 is arc-shaped, and the arc shape is directly the same as the arc shape of the circular cross section where the inner diameter of the channel 1 is located and is welded to the channel 1;

[0039] The diverter weir 3-1 and the retaining weir 3-2 are arranged vertically in the cross section AA of the channel 1. Specifically, the three-dimensional structure between the two second diverter weir edge ends 3-14 of the diverter weir 3-1 is perpendicular to the cross section of the channel 1 as a whole, and the planes formed by the second retaining weir edges 3-22 respectively provided on the upper and lower surfaces of the retaining weir 3-2 are perpendicular to the cross section of the channel 1.

[0040] The geometric center distance between the diverter weir 3-1 and the retaining weir 3-2 in the AA section is 100 mm to 200 mm; the angle between the diverter weir 3-1 and the channel center line 5 in the AA section is 30° to 60°; the second diverter weir edge end 3-14 is flush with the second retaining weir edge 3-22;

[0041] There is a channel section 1 between the two flanges 2. Each channel section 1 is provided with at least two sets of cofferdam structures 3 and the number is an even number. One cofferdam structure 3 is provided at the root of each flange 2, and the other cofferdam structures 3 are evenly and symmetrically distributed. The diverter weir 3-1 and the retaining weir 3-2 are solid structures and the material is platinum-rhodium alloy.

[0042] When installing the cofferdam structure 3, the channel 1 is first divided into several sections according to the distribution of the cofferdam structure 3, and then the cofferdam structure 3 is welded inside the channel, and finally the several sections of the channel 1 are welded together to form a weld 4; after the installation is completed, the glass liquid first flows in the channel 1, and then the glass liquid is divided into a first diversion 6 and a second diversion 7 after passing through the diversion weir 3-1. Since the space through which the second diversion 7 flows becomes smaller and the flow rate increases, the second diversion 7 changes direction under the action of the retaining weir 3-2 and collides with the first diversion 6, thereby generating a vortex 8, and finally, multiple groups of cofferdam structures 3 are used to jointly achieve high-quality clarification of the glass liquid.

[0043] In the following, only some exemplary embodiments are briefly described, and the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be illustrative rather than restrictive in nature.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed or operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0048] Embodiment 1

[0049] like Figure 1 As shown, a channel structure for improving the clarification quality of glass liquid includes a channel 1, a flange 2 and a cofferdam structure 3, wherein the cofferdam structure 3 includes a diverter weir 3-1 and a retaining weir 3-2, wherein the diameter of the channel 1 is 300 mm;

[0050] Specifically, the cross section of the diverter weir 3-1 is drop-shaped, the first diverter weir edge 3-11 is a straight line with a length of 100 mm, the second diverter weir edge 3-12 is arc-shaped, the first diverter weir edge end 3-13 is a semicircle with a diameter of 2 mm, and the second diverter weir edge end 3-14 is connected to the second diverter weir edge 3-12 in an arc-shaped transition;

[0051] The cross section of the retaining weir 3-1 is annular, and the first retaining weir edge 3-21 is an arc with a radius of 150 mm. The thickness of the retaining weir 3-2 is 2 mm, and the second retaining weir edge 3-22 is an arc transition;

[0052] The upper and lower ends of the diverter weir 3-1 are welded to the channel 1; one side of the retaining weir 3-2 is arc-shaped, the arc is directly the same as the inner diameter of the channel 1 and is welded to the channel 1; the diverter weir 3-1 and the retaining weir 3-2 are vertically arranged in the section AA of the channel 1; the geometric center distance between the diverter weir 3-1 and the retaining weir 3-2 in the AA section is 100mm; the angle between the diverter weir 3-1 and the channel centerline 5 in the AA section is 30°; the second diverter weir edge end 3-14 is flush with the second retaining weir edge 3-22; there is a channel 1 in the middle of the two flanges 2, and each channel 1 is provided with at least 2 groups of cofferdam structures 3 and the number is an even number, one cofferdam structure 3 is arranged at the root of each flange 2, and the remaining cofferdam structures 3 are evenly and symmetrically distributed.

[0053] Embodiment 2

[0054] like Figure 1 As shown, a channel structure for improving the clarification quality of glass liquid includes a channel 1, a flange 2 and a cofferdam structure 3, wherein the cofferdam structure 3 includes a diverter weir 3-1 and a retaining weir 3-2, wherein the diameter of the channel 1 is 350 mm;

[0055] Specifically, the cross section of the diverter weir 3-1 is drop-shaped, the first diverter weir edge 3-11 is a straight line with a length of 150 mm, the second diverter weir edge 3-12 is arc-shaped, the first diverter weir edge end 3-13 is a semicircle with a diameter of 8 mm, and the second diverter weir edge end 3-14 is connected to the second diverter weir edge 3-12 in an arc-shaped transition;

[0056] The cross section of the retaining weir 3-1 is annular, and the first retaining weir edge 3-21 is an arc with a radius of 200 mm. The thickness of the retaining weir 3-2 is 8mm, and the second retaining weir edge 3-22 is an arc transition;

[0057] The upper and lower ends of the diverter weir 3-1 are welded to the channel 1; one side of the retaining weir 3-2 is arc-shaped, and the arc is directly the same as the inner diameter of the channel 1 and is welded to the channel 1;

[0058] The diverter weir 3-1 and the retaining weir 3-2 are arranged vertically in the section AA of the channel 1; the geometric center distance between the diverter weir 3-1 and the retaining weir 3-2 in the section AA is 200 mm; the angle between the diverter weir 3-1 and the channel centerline 5 in the section AA is 60°; the second diverter weir edge end 3-14 is arranged flush with the second retaining weir edge 3-22; there is a channel 1 section in the middle of the two flanges 2, and each channel 1 is provided with at least 2 groups of cofferdam structures 3 and the number is an even number, one cofferdam structure 3 is arranged at the root of each flange 2, and the remaining cofferdam structures 3 are evenly and symmetrically distributed.

[0059] Embodiment 3

[0060] like Figure 1As shown, a channel structure for improving the clarification quality of glass liquid includes a channel 1, a flange 2 and a cofferdam structure 3, wherein the cofferdam structure 3 includes a diverter weir 3-1 and a retaining weir 3-2, wherein the diameter of the channel 1 is 325 mm;

[0061] Specifically, the cross section of the diverter weir 3-1 is drop-shaped, the first diverter weir edge 3-11 is a straight line with a length of 125 mm, the second diverter weir edge 3-12 is arc-shaped, the first diverter weir edge end 3-13 is a semicircle with a diameter of 5 mm, and the second diverter weir edge end 3-14 is connected to the second diverter weir edge 3-12 in an arc-shaped transition;

[0062] The cross section of the retaining weir 3-1 is annular, and the first retaining weir edge 3-21 is an arc with a radius of 175 mm. The thickness of the retaining weir 3-2 is 5mm, and the second retaining weir edge 3-22 is an arc transition; the upper and lower ends of the diverter weir 3-1 are welded to the channel 1; one side of the retaining weir 3-2 is an arc, which is directly the same as the inner diameter of the channel 1 and is welded to the channel 1; the diverter weir 3-1 and the retaining weir 3-2 are vertically arranged in the section AA of the channel 1; the geometric center distance between the diverter weir 3-1 and the retaining weir 3-2 in the AA section is 150mm; the angle between the diverter weir 3-1 and the channel centerline 5 in the AA section is 45°; the second diverter weir edge end 3-14 is flush with the second retaining weir edge 3-22; there is a channel 1 in the middle of the two flanges 2, and each channel 1 is provided with at least 2 sets of cofferdam structures 3 and the number is an even number, one cofferdam structure 3 is arranged at the root of each flange 2, and the remaining cofferdam structures 3 are evenly and symmetrically distributed.

[0063] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only examples in all respects, not the only ones, and all changes within the scope of the present invention or equivalent to the scope of the present invention are included in the present invention.

Claims

1. A cofferdam structure for improving the clarification quality of molten glass, It is characterized in that The invention comprises a diverter weir (3-1) arranged inside a platinum channel and a retaining weir (3-2) arranged inside the platinum channel, wherein the cross section of the diverter weir (3-1) is similar to a water drop shape, and the water drop shape comprises: a first diverter weir edge (3-11), a second diverter weir edge (3-12), a first diverter weir edge end (3-13) and a second diverter weir edge end (3-14), the first diverter weir edge (3-11) is a straight line, the second diverter weir edge (3-12) is an arc, the first diverter weir edge end (3-13) is a semicircle, and the second diverter weir edge end (3-14) is connected to the second diverter weir edge (3-12) in an arc transition; and The cross section of the retaining weir (3-2) comprises: a first retaining weir edge (3-21) and a second retaining weir edge (3-22), and the first retaining weir edge (3-21) is in an arc shape in space, the retaining weir (3-2) is a similar ring-shaped structure, the retaining weir (3-2) is bent in the horizontal direction as a whole, the projections of the upper and lower surfaces of the retaining weir (3-2) overlap, and the surface where the second retaining weir edge (3-22) is located is connected to the annular surface where the first retaining weir edge (3-21) is located in an arc-shaped transition, and the annular surface of the retaining weir (3-2) is installed closely to the inner surface of the platinum channel.

2. A cofferdam structure for improving the clarification quality of molten glass according to claim 1, It is characterized in that The length of the first diversion weir edge (3-11) is 100mm to 150mm, and the diameter of the first diversion weir edge end (3-13) is 2mm to 8mm.

3. A cofferdam structure for improving the clarification quality of molten glass according to claim 1, It is characterized in that The thickness of the retaining weir (3-2) is 2 mm to 8 mm, and the curvature of the first retaining weir edge (3-21) is 4. A channel structure for improving the clarification quality of glass liquid, It is characterized in that The cofferdam structure according to any one of claims 1 to 3 comprises: a channel (1), a flange (2) and a plurality of cofferdam structures (3), wherein the flanges (2) are installed at both ends of the channel (1), and the cofferdam structure (3) is arranged inside the channel (1); The cofferdam structure (3) comprises a diverter weir (3-1) and a retaining weir (3-2); the upper surface and the lower surface of the diverter weir (3-1) are respectively closely connected to the inner surface of the channel (1); and the annular surface of the retaining weir (3-2) is closely installed to the inner surface of the platinum channel; The line between the second diverter weir edge ends (3-14) on the upper and lower surfaces of the diverter weir (3-1) and the plane defined by the second retaining weir edge (3-22) on the upper and lower surfaces of the retaining weir (3-2) are perpendicular to the cross section of the channel (1), and the farthest end of the second diverter weir edge end (3-14) and the plane defined by the second retaining weir edge (3-22) on the upper and lower surfaces of the retaining weir (3-2) are spatially flush.

5. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that The angle between the extension line of the first diverter weir edge (3-11) in the diverter weir (3-1) and the center line of the channel (1) is 30° to 60°.

6. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that The distance between the geometric center of the diversion weir (3-1) and the geometric center of the retaining weir (3-2) is 100 mm to 200 mm.

7. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that The first retaining weir edge (3-21) is in an arc shape, and its radius is 150mm to 200mm.

8. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that A cofferdam structure (3) is arranged on the adjacent side of the flange (2), and at least two cofferdam structures (3) are arranged in the channel and the number of the cofferdam structures (3) is an even number.

9. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that The cofferdam structure (3) is a solid structure.

10. A channel structure for improving the clarification quality of molten glass according to claim 4, It is characterized in that The cofferdam structure (3) is made of platinum-rhodium alloy.

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