Tin bath blocking ridge structure for float glass production

Abstract

The present invention relates to the technical field of glass production, and discloses a tin bath baffle ridge structure for float glass production, the tin bath baffle ridge structure comprises a baffle ridge main body, the specific gravity of the baffle ridge main body is greater than the specific gravity of the tin liquid, such that the baffle ridge main body can sink into the tin liquid, can be stable in the tin liquid, and does not need to be fixedly connected with the tin bath main body structure; the position can be conveniently adjusted according to needs, the specific number can be conveniently set according to process requirements, and it is guaranteed that the position and the number of the blocking ridges are the best choices meeting the process requirements. The outline of the cross section of the blocking ridge body is triangular, and the lengths of the three edges of the triangle are sequentially increased / decreased. Therefore, the height values corresponding to the three edges of the blocking ridge main body are different, so that different height values of the blocking ridge main body can be selected for use as required when the model of glass is replaced, the blocking ridge can better adapt to production of different types of glass, and the adjusting process is more convenient and quicker than that of an existing blocking ridge.

Description

Technical Field

[0001] The present invention relates to the technical field of glass production, and particularly relates to a sill structure for float glass production in a tin bath. Background Art

[0002] Glass is an amorphous solid material with wide applications and an important industrial status. It is usually formed by melting various chemical components (such as silicon dioxide, sodium oxide, calcium oxide, etc.) at high temperatures and then cooling. There are various glass production methods, and different production methods are applicable to different application scenarios and product types, such as float glass production, rolling glass production, blowing glass production, drawing glass production, casting glass production, and microcrystalline glass production.

[0003] Among them, after decades of development, the process route of float glass production has been basically mature and finalized, playing an important role in the production of ordinary glass. However, with the development of the times, various glasses are gradually developing towards high-end, and the demand is increasing, such as electronic glass and optical glass. And float glass has an innate production capacity advantage. Therefore, in recent years, more and more float production of electronic glass has developed.

[0004] The main production route of float glass is to introduce the molten glass liquid into the tin bath, flatten and thin it in the tin bath to form a glass ribbon (such as Figure 1 ), and then pass through the sealing box and transition rollers into the annealing furnace, and be cut into glass sheets. In the tin bath, the glass needs to go through a series of processes such as flattening, thinning, shaping, and cooling from the inlet to the outlet. Each process needs to be realized at different temperatures, and there is a large temperature gradient for each process to be realized. Since the tin liquid is in a connected and flowing state in the tin bath, it is necessary to partition the tin liquid to reduce the tin liquid convection between different areas, so as to ensure that the temperatures of each functional area are adjusted in place in time.

[0005] The existing method for partitioning the tin liquid is as follows: Grooves are opened at the bottom of the tin bath (bottom bricks) at a specified position. When partitioning is required, a partitioning material (i.e., a sill) of a specified height is inserted into the bath (such as Figure 2 ), and in order to ensure the stability of the sill, it is usually set in a T-shaped or T-like structure. However, since the bottom bricks are grooved and buried in the tin liquid, and the sill needs to be accurately inserted into the groove, it is necessary to manually try to find the position of the card slot during installation, resulting in high installation difficulty, low installation efficiency, and long production time affected.

[0006] Summary of the Invention

[0007] The technical problem solved by the present invention is as follows: In the prior art, the bottom brick of the tank is grooved and buried in the tin bath, and the retaining sill needs to be accurately inserted into the groove. Therefore, during installation, it is necessary for workers to try and grope for the position of the card slot manually, resulting in high installation difficulty, low installation efficiency, and a long impact on production time.

[0008] The object of the present invention can be achieved by the following technical solutions:

[0009] A retaining sill structure for a float glass production tin bath, comprising a retaining sill body. The specific gravity of the retaining sill body is greater than that of the tin bath, and the maximum value of its height is less than the depth value of the tin bath. The cross-sectional profile of the retaining sill body is triangular, and the lengths of the three edges of the triangle increase / decrease in sequence.

[0010] In one embodiment of the present invention: When the depth of the tin bath is d and the thickness of the glass plate is t, the maximum height value of the retaining sill body shall not exceed H = d - 0.38t.

[0011] In one embodiment of the present invention: In the cross-section of the retaining sill body, the heights from its three vertices to the opposite edges are L1, L2, and L3 respectively. Then: L1 = (0.75 + α) * H, L2 = (0.9 + α) * H, L3 = (0.6 + α) * H; where α = (v - v0) / v0, v0 is the designed running speed of the glass plate, and v is the actual running speed of the glass plate.

[0012] In one embodiment of the present invention: An arc-shaped transition part is provided at the edge position of the retaining sill body.

[0013] In one embodiment of the present invention: At least one end of the retaining sill body is provided with an adjustment notch, and the adjustment notch is located on the edge of the triangle in the cross-section of the retaining sill body.

[0014] In one embodiment of the present invention: The adjustment notch is located at the middle position of the edge of the triangle in the cross-section of the retaining sill body where it is located.

[0015] In one embodiment of the present invention: The retaining sill body includes a first body and a second body fixedly connected. An installation cavity is provided in the first body, and the second body is arranged in the installation cavity.

[0016] In one embodiment of the present invention: The cross-sectional profile of the installation cavity is circular, square, or triangular.

[0017] In one embodiment of the present invention: The material of the first body is graphite or hexagonal boron nitride, and the material of the second body is tungsten.

[0018] In one embodiment of the present invention: In the cross-section of the retaining sill body, the area of the installation cavity accounts for 35 - 45% of the total area.

[0019] A sill structure for float glass production according to the present invention has at least one of the following technical effects:

[0021] The present application provides a sill structure for float glass production, including a sill main body. The specific gravity of the sill main body is greater than that of the tin bath liquid, so that the sill main body can sink into the tin bath liquid and remain stable in the tin bath liquid without being fixedly connected to the main structure of the tin bath. It is convenient to adjust the position according to needs and also convenient to set the specific quantity according to process requirements, ensuring that the position and quantity of the sill are the best choices that meet the process requirements. The cross-sectional profile of the sill main body is triangular, and the lengths of the three edges of the triangle increase / decrease in sequence. In this way, the height values corresponding to the three edges of the sill main body are all different. Thus, when changing the glass type, different height values of the sill main body can be selected for use according to needs, which can better adapt to the production of different varieties of glass, and the adjustment process is more convenient and fast compared with the existing sill. A single sill can ensure the adaptation to the requirements of three models. Compared with the existing sill structure, the number of sill models to be produced is greatly reduced, bringing more convenience to the production process.

[0022] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand in the description of the embodiments in conjunction with the following drawings. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0024] Figure 1 is a schematic structural diagram of a tin bath to which a sill structure for float glass production according to the present invention is applied;

[0025] Figure 2 is a schematic structural diagram of the cooperation between an existing tin bath sill and a tin bath;

[0026] Figure 3 is a schematic structural diagram of the cooperation between a sill structure for float glass production according to the present invention and a tin bath;

[0027] Figure 4 is a schematic three-dimensional structural diagram of an embodiment of a sill structure for float glass production according to the present invention;

[0028] Figure 5 is a schematic structural diagram of the end of a sill structure for float glass production according to the present invention;

[0029] Figure 6 The present invention is a schematic structural diagram of an adjustment gap in a tin bath retaining structure used in float glass production.

[0030] The reference numerals in the figure are:

[0031] 1. Glass ribbon; 2. Tin liquid; 3. Main body of the barrier; 4. Main body of the tin bath; 5. Adjustment gap;

[0032] 31. First subject; 32. Second subject. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Float glass production requires that the glass liquid be introduced into a tin bath, and then flattened and stretched in the tin bath to form a glass ribbon 1 (such as Figure 1 ), during this process, a series of processes such as flattening, thinning, shaping, and cooling need to be carried out in sequence. Each process needs to be implemented at a different temperature, and the temperature implemented in each process has a large gradient. Since the tin liquid 2 is in a connected and flowing state in the tin bath, it is necessary to divide the tin liquid 2 into zones to reduce the convection of the tin liquid 2 between the zones, thereby ensuring that the temperature of each functional zone is adjusted in place in time. The existing method of partitioning the tin liquid 2 is: grooves are cut at the bottom of the tin bath body 4 at designated positions (bottom bricks), and when partitioning is required, a dividing material (usually in the form of a retaining ridge) of a designated height is inserted into the groove (such as Figure 2 ), and in order to ensure the stability of the barrier, it is usually set to a T-shaped or T-shaped structure.

[0035] The existing tin bath segmentation methods have many limitations. First, since the installation grooves are opened on the bottom bricks of the bath, the positions of the grooves are fixed at the initial design stage, and the positions and quantities of the segmentation materials (baffles) that can be installed are determined, making it difficult to adjust flexibly. In actual production, due to different glass types, changes in the pulling rate, etc., the quantity, position, and height of the baffles may all need to be adjusted according to the situation. However, the fixed installation grooves of the existing baffles often result in them not being the best choice. Second, when changing the production of different types of glass during glass production, when the size of the original segmentation material does not meet the requirements of the new variety, that is, when the height of the baffle extending into the tin bath 2 needs to be adjusted, only the existing segmentation material can be removed and a new segmentation material that meets the size requirements can be remade and reinstalled. Since the grooves in the bottom bricks are buried in the tin bath 2 and the baffles need to be precisely inserted into the grooves, it is necessary to manually try to find the position of the card slots during installation, which is difficult, has low installation efficiency, and affects the production time for a long time.

[0036] To solve the above defects, the present application provides a baffle structure for a tin bath used in float glass production, including a baffle body 3. The specific gravity of the baffle body 3 is greater than that of the tin bath 2, so that the baffle body 3 can sink into the tin bath 2 and remain stable in the tin bath 2 without being fixedly connected to the structure of the tin bath body 4, which is convenient for adjusting the position as needed and also for setting the specific quantity according to the process requirements, ensuring that the position and quantity of the baffle are the best choices that meet the process requirements. The cross-sectional profile of the baffle body 3 is triangular, and the lengths of the three edges of the triangle increase / decrease in sequence. In this way, the height values corresponding to the three edges of the baffle body 3 are all different. In this way, when changing the glass type, different height values of the baffle body 3 can be selected for use according to the needs, which can better adapt to the production of different types of glass, and the adjustment process is more convenient and fast compared to the existing baffles. A single baffle can ensure that it meets the requirements of three models. Compared with the existing baffle structure, the number of baffle models that need to be produced is greatly reduced, bringing more convenience to the production process.

[0037] Please refer to Figures 1-6, the present invention is a structure of a weir for float glass production, including a weir main body 3. The specific gravity of the weir main body 3 is greater than that of the tin bath 2, so that the weir main body 3 can sink into the tin bath 2 and remain stable in the tin bath 2 without being fixedly connected to the structure of the tin bath main body 4. It is convenient to adjust the position according to needs and to set the specific quantity according to process requirements, ensuring that both the position and quantity of the weir are the best choices that meet the process requirements. And the maximum value of its height is less than the depth value of the tin bath 2, so as to leave a sufficient safety distance between the top of the weir main body 3 and the liquid level of the tin bath 2 for the safe passage of the glass ribbon 1. The cross-sectional profile of the weir main body 3 can be triangular, and the lengths of the three edges of the triangle increase / decrease in sequence. In this way, the three planes of the triangular prism-shaped weir main body 3 can be used to contact the bottom of the tin bath, and the height of the edges opposite to the three planes (the distance between the edge and the plane) is used as the height of the weir main body 3 for partitioning the tin bath 2. And the lengths of the three edges in the cross-sectional profile are different, so that the height values corresponding to different edges of the weir main body 3 are different, in order to be suitable for the use of glass products of different specifications. In actual use, the upward edge of the weir main body 3 can be adjusted.

[0038] Please refer to Figures 1-6 , in one embodiment of the present invention, an arc-shaped transition part can be provided at the edge position of the weir main body 3. The weir main body 3 can include a first main body 31 and a second main body 32 fixedly connected. An installation cavity is provided in the first main body 31, and the second main body 32 is arranged in the installation cavity. The installation cavity can be a cavity opened on the first main body 31 and communicating with the outside, or a closed cavity not communicating with the outside. When a closed cavity structure is selected, the two ends of the cavity can be closed by a detachable plug, so as to more simply complete the combination of the first main body 31 and the second main body 32. The cross-sectional profile of the installation cavity can be circular, square or triangular. As an example, in this embodiment, the cross-sectional profile of the second main body 32 (i.e., the installation cavity) is set to be triangular and consistent with the profile of the first main body 31, so that the wall thickness of the first main body 31 can be more uniform and the center of gravity can be set more reasonably, so that the whole is more stable when placed on the bottom of the tin bath after the two are combined.

[0039] Please refer to Figures 1-6, in one embodiment of the present invention, the specific materials of the first main body 31 and the second main body 32 can be selected according to actual needs. On the one hand, it is necessary to meet the requirements for use in the tin bath 2, and on the other hand, the total specific gravity after the combination of the two is greater than the specific gravity of the tin bath 2, so as to be able to sink into the tin bath 2 and maintain stability. In this embodiment, by way of example, the material of the first main body 31 can be graphite or hexagonal boron nitride, and the material of the second main body 32 can be tungsten. In the cross-section of the retaining dam main body 3, the area of its installation cavity accounts for 35-45% of the total area. Further preferably, the area of the installation cavity accounts for 38-42% of the total area. The installation cavity is used to accommodate the second main body 32 with a greater specific gravity, and the proportion of the second main body 32 is reasonably set to ensure the overall performance of the retaining dam main body 3 and maintain stability in the tin bath 2.

[0040] Please refer to Figures 1-6 , in one embodiment of the present invention, at least one end of the retaining dam main body 3 is provided with an adjustment notch 5. The adjustment notch 5 is located on the edge of the triangle in the cross-section of the retaining dam main body 3, that is, on the plane of the retaining dam main body 3. The adjustment notch 5 can be a circular, triangular or square structure, and can be a groove structure or a through-hole structure penetrating the wall thickness of the first main body 31. Preferably, the adjustment notch 5 is located at the middle position of the edge of the triangle in the cross-section of the retaining dam main body 3 where it is located. By providing the adjustment notch 5, when it is necessary to adjust the upward edge of the retaining dam main body 3, a bar-shaped tool can be inserted into the adjustment notch 5, and then the retaining dam main body 3 can be flipped, so as to achieve the purpose of simply and quickly adjusting the height of the retaining dam main body 3 put into use. And this adjustment can be realized online without stopping the equipment, and the impact on production is minimal. Specifically, the adjustment notch 5 is provided on at least two surfaces of the retaining dam main body 3, and preferably on the three planes of the retaining dam main body 3 respectively for more convenient adjustment.

[0041] Please refer to Figures 1-6, in one embodiment of the present invention, during the actual design and use of the retaining sill, when the depth of the tin bath 2 is d and the thickness of the glass plate is t, the maximum height value of the retaining sill body 3 shall not exceed H = d - 0.38t. Thus, above the retaining sill, that is, between the top of the retaining sill and the liquid surface of the tin bath 2, there is sufficient space for the smooth flow of the glass ribbon 1. The three height values of the retaining sill body 3 can be selected and designed according to the actual situation. As an example, in the cross-section of the retaining sill body 3, the heights from its three vertices to the opposite edges are L1, L2, and L3 respectively. Then: L1 = (0.75 + α) * H, L2 = (0.9 + α) * H, L3 = (0.6 + α) * H; where α = (v - v0) / v0, v0 is the designed running speed of the glass plate, and v is the actual running speed of the glass plate. After determining L1, L2, and L3, the side lengths of the triangle in the cross-section profile can be determined respectively according to the three side heights, thereby completing the parameter design of the entire retaining sill body 3.

[0042] The working principle of the present invention:

[0043] During actual use, the retaining sill body 3 can be placed at a specified position in the tin bath according to production needs and process requirements. Since the specific gravity of the retaining sill body 3 is greater than that of the tin bath 2, the retaining sill body 3 can sink into the tin bath 2 and remain stable. Since the retaining sill body 3 and the tin bath are connected in a non-fixed manner, the position and quantity of the retaining sill body 3 can be quickly adjusted according to actual needs. Since the cross-section profile of the retaining sill body 3 in this application is triangular and the three height values are different, the height value of the retaining sill body 3 in use can be adjusted by flipping the retaining sill body 3, so as to adapt to the production and use of glass of different specifications and varieties (drawing speeds).

[0044] The above has described a detailed description of an embodiment of the present invention, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention shall still fall within the scope covered by the claims of the present invention.

[0045] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0046] In the description of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the contact between the first and second features not being direct but through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

[0047] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arranged" and "connected" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A tin bath retaining structure for float glass production, characterized in that It comprises a barrier body, the specific gravity of which is greater than that of the tin liquid, and the maximum value of its height is less than the depth of the tin liquid. The cross-sectional profile of the barrier body is triangular, and the lengths of the three edges of the triangle increase / decrease in sequence.

2. The tin bath retaining structure for float glass production according to claim 1, characterized in that: When the depth of the tin liquid is d and the thickness of the glass plate is t, the maximum height of the barrier body shall not exceed H=d-0.38t.

3. The tin bath retaining structure for float glass production according to claim 2, characterized in that: In the cross section of the barrier body, the heights from its three vertices to the opposite edges are L1, L2, and L3, respectively, then: L1 = (0.75 + α) * H, L2 = (0.9 + α) * H, L3 = (0.6 + α) * H; wherein, α = (v - v0) / v0, v0 is the designed operating speed of the glass plate, and v is the actual operating speed of the glass plate.

4. The tin bath retaining structure for float glass production according to claim 1, characterized in that: An arc-shaped transition portion is arranged at the edge of the barrier body.

5. The tin bath retaining structure for float glass production according to claim 1, characterized in that: At least one end of the retaining wall body is provided with an adjustment notch, and the adjustment notch is located on an edge of a triangle in the cross section of the retaining wall body.

6. The tin bath retaining structure for float glass production according to claim 5, characterized in that: The adjustment notch is located at the middle of the edge of the triangle in the cross section of the retaining wall body.

7. The tin bath retaining structure for float glass production according to claim 1, characterized in that: The barrier body comprises a first body and a second body which are fixedly connected, a mounting cavity is defined in the first body, and the second body is disposed in the mounting cavity.

8. The tin bath retaining structure for float glass production according to claim 7, characterized in that: The cross-sectional profile of the installation cavity is circular, square or triangular.

9. The tin bath retaining structure for float glass production according to claim 1, characterized in that: The material of the first body is graphite or hexagonal boron nitride, and the material of the second body is tungsten.

10. The tin bath retaining structure for float glass production according to claim 1, characterized in that: In the cross section of the barrier body, the area of ​​the installation cavity accounts for 35-45% of the total area.

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