Roller table transfer device for electronic float glass

Abstract

1. A roller table transfer device for electronic float glass, comprising: a plurality of transfer rollers rotatably installed on an inner wall of an annealing furnace; a plurality of boron nitride rings fixedly fitted on an outer wall of each of the transfer rollers; a heat-resistant steel tube is installed on both sides of each transfer roller; a plurality of exhaust holes are installed on the outer wall of the heat-resistant steel tube, the heat-resistant steel tube communicates with an external hot air supply box; and a plurality of cleaning parts used together with the transfer rollers are installed on the inner bottom of the annealing furnace.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 30, 2022, bearing application number 202211722710.6 and titled "Roller table transfer device for high-end electronic float glass," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of glass production technology, and in particular to a roller table transfer device for electronic float glass. [Background technology]

[0003] The process of forming float glass begins by putting molten liquid glass at about 1100°C into a tin bath through a flow channel or flow tank. Because the densities of liquid glass and liquid tin are different, the liquid glass floats on the liquid tin. The liquid glass is spread by gravity and surface tension, polished, and cooled uniformly, and then stretched and laminated by a top roll to form a glass ribbon of a certain thickness. The glass ribbon is gradually cooled in the tin bath to become a glass sheet, and when it is cooled to about 650°C at the exit of the tin bath, it is lifted by a transfer roller table, and separated from the tin bath by the traction force of the conveying rollers of the annealing furnace, and entered into the annealing furnace to be annealed and stress is relieved. The glass is then inspected, cut, boxed, and packaged for storage.

[0004] The traction force for producing float glass mainly comes from the annealing furnace rollers. Generally, the annealing furnace rollers for float glass are steel rollers or ceramic rollers, and moreover, the surface of the higher-grade steel rollers is plated with zirconia-based materials. However, immediately after the glass ribbon leaves the tin bath, friction occurs between the glass ribbon and the annealing furnace conveying rollers. In particular, the three transfer rollers on the transfer roller table are contaminated to different degrees by impurities such as tin oxide from the tin bath during the long-term production process, so that there are many sticky substances and many irregular protrusions on the surface of the transfer rollers, which causes scratches and silk-like glass defects of different degrees on the underside of the glass ribbon. Summary of the Invention

[0005] SUMMARY OF THE PREFERRED EMBODIMENTS The objective of the present invention is to provide a roller table transfer device for electronic float glass to solve the problems of the prior art.

[0006] An embodiment of the present invention provides a roller table transfer device for electronic float glass, comprising: a plurality of transfer rollers rotatably installed on the inner wall of an annealing furnace; a plurality of boron nitride rings fixedly fitted on the outer wall of each of the transfer rollers; a heat-resistant steel tube is installed on both sides of each of the transfer rollers; a plurality of exhaust holes are installed on the outer wall of the heat-resistant steel tube; the heat-resistant steel tube communicates with an external hot air supply box; and a plurality of cleaning parts used in conjunction with the transfer rollers are installed on the inner bottom of the annealing furnace.

[0007] In some embodiments of the present invention, a plurality of pairs of first support frames are symmetrically fixed to the inner bottom of the annealing furnace, a lifting rod is installed on the upper end surface of each of the first support frames, two mounting rings are symmetrically fixedly fitted onto the outer wall of each of the heat-resistant steel tubes, and the upper ends of the lifting rods are fixedly connected to the outer walls of the mounting rings.

[0008] In some embodiments of the present invention, each of the cleaning parts includes two second support frames symmetrically fixed to the inner bottom of the annealing furnace, and the upper portions of the two second support frames are An identical mounting seat is fixed to the end face, and a scraper is disposed within said mounting seat.

[0009] In some embodiments of the present invention, a lower penetration groove is installed on the side wall of each mounting seat, a push-down plate is movably installed in the lower penetration groove, a scraper is fixed to the upper end surface of the corresponding push-down plate, and the scraper movably penetrates the mounting seat.

[0010] In some embodiments of the present invention, each of the heat-resistant steel tubes is installed on both the left and right sides of each of the transition rollers, there is a certain gap between the scraper and the outer wall of the boron nitride ring, and the scraper is installed on the left side of the boron nitride ring.

[0011] In some embodiments of the present invention, each of the lower penetrating chambers has a plurality of telescopic rods fixed between it and the pressing plate, and a plurality of springs are fixed between the lower penetrating chambers and the pressing plate, and the springs are movably fitted onto the outer walls of the telescopic rods.

[0012] In some embodiments of the present invention, an inclined scrap block is secured to an upper end surface of each of the mounting seats.

[0013] In some embodiments of the present invention, the angled scrap block is attached to the scraper with an inclined surface facing the transition roller.

[0014] In some embodiments of the present invention, both sides of each of the presser plates are movable through the annealing furnace, and both sides of the annealing furnace are provided with presser-through tanks that are used in conjunction with the presser plates.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. After the float glass ribbon leaves the outlet of the tin bath, the edges of both sides of the glass ribbon are directly in contact with the outer wall of the boron nitride ring, and the transfer roller moves the corresponding boron nitride ring to rotate and convey the glass ribbon. During this process, the hot air supply box conveys hot nitrogen gas into each heat-resistant steel pipe, and the hot nitrogen gas flows upward from the exhaust hole of the corresponding heat-resistant steel pipe to apply a biasing force to the underside of the effective width of the float glass ribbon, and avoids the occurrence of dents in the effective width part of the glass ribbon. This method can avoid the friction between the transfer roller and the underside of the effective width of the glass ribbon when conveying the float glass ribbon, and effectively solve the problem of scratches and lint-like defects on the underside of the float electronic glass ribbon plate. At the same time, the nitrogen gas air bearing can be used to fill the roller table transfer device with nitrogen gas, which can prevent the air in the roller table transfer device from entering the tin bath through the outlet of the tin bath, and reduce the generation of impurities such as tin oxide in the tin bath.

[0017] 2. In use, there is a certain gap between the scraper and the outer wall of the boron nitride ring, and the scraper is installed on the left side of the boron nitride ring. During the rotation of the boron nitride ring, when impurities adhering to its outer wall come into contact with the scraper, it exerts a leftward biasing force on the scraper, but the scraper remains stationary, scraping off the impurities adhering to the outer wall of the boron nitride ring, which is convenient to use. [Brief description of the drawings]

[0018] The drawings described herein are intended to provide a further understanding of the invention and are intended to form a part of the invention. The exemplary embodiments and the description thereof are intended to be illustrative of the invention and are not intended to be limiting of the invention.

[0019] [Figure 1] FIG. 1 is a schematic diagram of the overall configuration of a roller table shifting device according to an embodiment of the present invention. [Diagram 2]FIG. 2 is a side view of the roller table shifting device according to the embodiment of the present invention. [Diagram 3] FIG. 3 is a distribution diagram of the transfer rollers and the heat-resistant steel pipes in the annealing furnace in the embodiment of the present invention. [Figure 4] FIG. 4 is a schematic diagram of a connection between a heat-resistant steel tube and a mounting ring in an embodiment of the present invention. [Figure 5a] FIG. 5a is a schematic diagram of the connection between the second support frame and the mounting seat in the embodiment of the present invention. [Figure 5b] FIG. 5b is a side schematic view of the connection between the second support frame and the mounting seat in the embodiment of the present invention. [Figure 6] FIG. 6 is a schematic diagram of the internal configuration of the lower through-vessel in the embodiment of the present invention. [Figure 7] FIG. 7 is a schematic diagram of the internal configuration of the mounting seat in the embodiment of the present invention. [Figure 8] FIG. 8 is a schematic diagram of the internal configuration of a cleaning component in an embodiment of the present invention. [Explanation of symbols]

[0020] 1: annealing furnace, 2: transition roller, 3: boron nitride ring, 31: boron nitride rings on both sides, 4: heat-resistant steel tube, 41: exhaust hole, 5: first support frame, 6: lifting rod, 7: mounting ring, 8: second support frame, 9: mounting seat, 91: connection part, 10: scraper, 11: lower penetration tank, 12: press plate, 121: horizontal part of press plate; 122: vertical part of press plate, 13a: telescopic rod, 13b: spring, 14: inclined scrap block, 15: press penetration tank, 16: guide rod. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in more detail below with reference to the drawings and examples. It is clear that the described examples are only some of the embodiments of the present invention, and are not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art are all included in the protection scope of the present invention.

[0022] As shown in Fig. 1 to Fig. 6, the embodiment of the present invention provides a roller table transfer device for electronic float glass, which includes a plurality of transfer rollers 2 rotatably installed on the inner wall of an annealing furnace 1, a plurality of boron nitride rings 3 fixedly fitted on the outer wall of each transfer roller 2, a heat-resistant steel tube 4 is installed on both sides of each transfer roller 2, a plurality of exhaust holes are installed on the outer wall of the heat-resistant steel tube 4, the heat-resistant steel tube 4 communicates with an external hot air supply box, and a plurality of cleaning parts used together with the transfer rollers 2 are installed on the inner bottom of the annealing furnace 1. As shown in Fig. 1 and Fig. 2, the heat-resistant steel tube 4 is installed on both the left and right sides of each transfer roller 2. In an actual device, the left side in Fig. 1 is generally the front side and the right side is the rear side, so it can be said that the heat-resistant steel tube 4 is installed on both the front and rear sides of each transfer roller 2.

[0023] For example, the number of transfer rollers 2 is specifically 6, each with a diameter of 150 mm. The number of boron nitride rings 3 fitted on each transfer roller 2 is 10. Each boron nitride ring 3 has an inner diameter of 150 mm, an outer diameter of 170 mm, and a width of 40 mm. The number of heat-resistant steel tubes 4 is 12. Each heat-resistant steel tube 4 has a diameter of 40 mm, and is made of 2520 stainless steel. The spacing between the exhaust holes in the heat-resistant steel tube 4 is 25 mm, and the diameter of the exhaust hole is 0.3 mm. The heat-resistant steel tube 4 is 15 mm vertically away from the glass ribbon, that is, the plane formed by the upper surface of the heat-resistant steel tube 4 is 5 mm lower than the plane formed by the upper surface of the transfer roller 2. The adjustable distance up and down of the heat-resistant steel tube 4 is 20 mm, but the specific adjustable distance depends on the thickness and When producing ultra-thin float glass for electronics with a thickness of 1.1 mm or less, the distance between the heat-resistant steel tube 4 and the glass ribbon is only required to be about 15 mm, and the pressure of the nitrogen gas in the heat-resistant steel tube 4 is about 0.05 Kpa.

[0024] In use, after the float glass ribbon leaves the outlet of the tin bath, it enters the roller table transfer device for electronic float glass. The edges of both sides of the glass ribbon (not shown) are directly contacted with the outer walls of the boron nitride rings. As shown in FIG. 2, the edges of both sides of the glass ribbon (not shown) are directly contacted with the outer walls of the boron nitride rings 31 on both sides of the transfer roller 2. At the same time, the lower surface of the effective portion of the glass ribbon is also contacted with the upper surface of each boron nitride ring 31 on the transfer roller 2. When the transfer roller 2 moves and rotates the corresponding boron nitride ring 3, it conveys the glass ribbon. In this process, the hot air supply box conveys hot nitrogen gas to each heat-resistant steel tube 4, and the hot nitrogen gas flows upward from the exhaust hole of the corresponding heat-resistant steel tube 4, applying a biasing force to the lower surface of the effective width of the float glass ribbon, and preventing the effective width portion of the glass ribbon from being dented. As shown in FIG. 4, the exhaust hole 41 is located at the top of the heat-resistant steel tube 4, and the hot nitrogen gas flows from the exhaust hole 41 to the float glass ribbon above. This method can avoid friction between the transfer roller and the underside of the effective width of the glass ribbon when transporting the float glass ribbon, and effectively solve the problem of scratches and fluff-like defects on the underside of the float glass ribbon plate. In addition, when a nitrogen gas air bearing is used, the roller table transfer device can be filled with nitrogen gas, thereby preventing the air in the roller table transfer device from entering the tin tank through the outlet of the tin tank, and reducing the generation of impurities such as tin oxide in the tin tank.

[0025] As shown in Figures 1 to 4, a plurality of pairs of first support frames are symmetrically fixed to the inner bottom of the annealing furnace 1. As shown in Figures 2 and 4, a lifting rod 6 is installed on the upper end surface of each first support frame 5, two mounting rings 7 are fixedly fitted symmetrically to the outer wall of each heat-resistant stainless steel tube 4, and the upper ends of the lifting rods 6 are fixedly connected to the outer walls of the mounting rings 7. As shown in Figure 4, the pair of symmetrically installed first support frames 5 supports the heat-resistant steel tube 4 inside the annealing furnace 1 by the mounting rings 7 of the lifting rods 6 installed at the upper ends.

[0026] The lifting rod 6 in Fig. 4 is adjustable in height, and because such a lifting configuration is a conventional technique, a description thereof will be omitted here. By installing the lifting rod 6 that can be raised and lowered, the height position of the heat-resistant steel tube 4 can be adjusted to accommodate glass ribbons of different thicknesses.

[0027] In an embodiment of the present invention, as shown in Figures 1, 2, 5a and 5b, each cleaning part includes two second support frames 8 symmetrically fixed to the inner bottom of the annealing furnace 1, identical mounting seats 9 are fixed to the upper end surfaces of the two second support frames 8, and a scraper 10 is installed in the mounting seats 9.

[0028] As shown in FIG. 1, in the process of using the boron nitride ring 3, the glass ribbon is moved from left to right, and in actual production, it can be said that it is moved from front to back. Some impurities are inevitably attached to its outer wall. In order to avoid the impurities from accumulating and increasing in number in this area, it is necessary to limit the thickness of the impurities on the outer wall of the boron nitride ring 3 so as to avoid affecting the conveyance of the glass ribbon. In use, there is a certain gap between the scraper 10 and the outer wall of the boron nitride ring 3, and the scraper 10 is installed on the left side of the boron nitride ring 3, which can also be said to be installed on the front side of the boron nitride ring 3 in the actual device. During the rotation of the boron nitride ring 3, when the impurities attached to its outer wall come into contact with the scraper 10, the scraper 10 is given a leftward biasing force, but the scraper 10 is left stationary, which scrapes off the impurities attached to the outer wall of the boron nitride ring 3, making it convenient to use.

[0029] 5a, each mounting seat 9 is suspended above two second support frames 8, the mounting seat 9 has a hollow structure, and the scraper 10 movably passes through the mounting seat 9. The scraper 10 has a plate-like structure, and is attached vertically to the mounting seat 9 in the width direction so that the scraper 10 movably passes through the mounting seat 9, with a part of the lower end being located within the mounting seat 9 and an upper end protruding from an upper plate of the mounting seat 9.

[0030] As shown in FIG. 5b, a lower penetration tank 11 is installed on the side wall of each mounting seat 9, a press plate 12 is movably installed in the lower penetration tank 11, a scraper 10 is fixed to the upper end surface of the corresponding press plate 12, and the scraper 10 movably penetrates the mounting seat 9. As shown in FIG. 6, the scraper 10 is fixed vertically to the upper end surface of the corresponding press plate 12. A plurality of telescopic rods 13a are fixed between each lower penetration tank 11 and the press plate 12, a plurality of springs 13b are fixed between the lower penetration tank 11 and the press plate 12, and the springs 13b are movably fitted on the outer wall of the telescopic rod. An inclined scrap block 14 is fixed on the upper end surface of each mounting seat 9. In this embodiment, the scraper 10 and the press plate 12 may be fixed by welding, the lower penetration tank 11 may be a rectangular tube, and the scraper 10 is telescopically movable in the lower penetration tank 11. The inclined scrap block 14 is attached to the scraper 10, and the inclined surface of the inclined scrap block 14 may be installed on the side facing the transition roller 2. In this embodiment, the number of the telescopic rods 13a and the springs 13b is not limited, for example, there is one each on both sides and in the center, or the same number as the boron nitride rings 3 on the transition roller 2, and the positions correspond to each other. As a result, the presser plate 12 is movably connected to the mounting seat 9 in the vertical direction by the multiple telescopic rods 13a and multiple springs 13b.

[0031] Both sides of each presser plate 12 movably penetrate the annealing furnace 1, and presser-through tanks 15 used together with the presser plates 12 are installed on both sides of the annealing furnace 1. Specifically, the positions of the presser-through tanks 15 in the annealing furnace 1 may correspond to the positions of the lower through tanks 11 on the two side walls of each mounting seat 9. In this way, both sides of the presser plate 12 movably penetrate the annealing furnace 1 through the lower through tanks 11.

[0032] After the scraper 10 is used for a certain period of time, when a certain amount of scraped off impurities are stuck to its side wall, the worker can press both ends of the presser plate 12. When the presser plate 12 moves down, it moves the scraper 10 down together, and when the scraper 10 moves down, it cooperates with the inclined scrap block 14 to scrape off the impurities stuck to the side wall of the scraper 10, so that it is convenient to use. During the process of pressing down the presser plate 12, the spring is pressed, and the spring contracts and accumulates elastic potential energy. After the impurities stuck to the side wall of the scraper 10 are scraped off, the presser plate 12 is released, and the presser plate 12 uses the spring elastic potential energy to press the scraper 10 back to its initial position.

[0033] In another embodiment of the present invention, as shown in Fig. 7 and Fig. 8, the mounting seat 9 of this embodiment adopts a guide rod 16 instead of a telescopic rod. As shown in Fig. 7, the spring 13b and the guide rod 16 are attached inside the mounting seat 9, and the scraper 10 is fixedly connected to the pressing plate 12, with a part of it protruding from the upper plate of the mounting seat 9. The spring 13b is fitted on the outside of the guide rod 16, and the pressing plate 12 has a horizontal part 121 and a vertical part 122, and the vertical part 122 realizes compression of the spring 13b. That is, the pressing plate 12 in this embodiment is movably connected to the mounting seat 9 in the up-down direction by a plurality of guide rods 16 and a plurality of springs 13b. In this embodiment, the scraper 10 and the horizontal part 121 of the pressing plate 12 may be fixed by welding, the mounting seat 9 may be a rectangular tube, and the scraper 10 can be telescopically moved inside the mounting seat 9 by the spring 13b.

[0034] The guide rod 16 is fixedly connected to the bottom of the mounting base 9 by a connection part 91. As shown in Fig. 7, the connection part 91 may be a bolt, and the guide rod 16 may be fixedly connected to the bottom of the mounting base 9 by two bolts.

[0035] In the embodiment of the present invention, when the float glass ribbon is used, after the float glass ribbon exits the outlet of the tin bath, both edges of the glass ribbon directly contact the outer wall of the boron nitride ring 3, and the transfer roller 2 moves and rotates the corresponding boron nitride ring 3 to convey the glass ribbon. In this process, the hot air supply box delivers hot nitrogen gas to each heat-resistant steel pipe 4, and the hot nitrogen gas flows upward from the exhaust hole of the corresponding heat-resistant steel pipe 4, providing a biasing force to the underside of the effective width of the float glass ribbon, and preventing the effective width of the glass ribbon from being dented. In this way, the friction between the transfer roller 2 and the underside of the effective width of the glass ribbon can be avoided when conveying the float glass ribbon, and the problem of scratches and foxing defects on the underside of the float electronic glass ribbon plate can be effectively solved. In addition, when the nitrogen gas air bearing is used, the roller table transfer device can be filled with nitrogen gas, which can prevent the air in the roller table transfer device from entering the tin bath through the outlet of the tin bath, and can reduce the generation of impurities such as tin oxide in the tin bath.

[0036] In use, there is a certain gap between the scraper 10 and the outer wall of the boron nitride ring 3, and the scraper 10 is installed on the left side of the boron nitride ring 3. As the boron nitride ring 3 rotates, impurities adhering to its outer wall come into contact with the scraper 10, exerting a leftward biasing force on the scraper 10. However, by keeping the scraper 10 stationary, the impurities adhering to the outer wall of the boron nitride ring 3 are scraped off, making it convenient to use.

[0037] After the scraper 10 is used for a certain period of time, when a certain amount of scraped off impurities are stuck to its side wall, the worker can press both ends of the presser plate 12. When the presser plate 12 moves down, it moves the scraper 10 down together, and when the scraper 10 moves down, it cooperates with the inclined scrap block 14 to scrape off the impurities stuck to the side wall of the scraper 10, so that it is convenient to use. When the presser plate 12 is pressed down, the spring is pressed, and the spring contracts and accumulates elastic potential energy. After the impurities stuck to the side wall of the scraper 10 are scraped off, the presser plate 12 is released, and the presser plate 12 uses the spring elastic potential energy to press the scraper 10 back to its initial position.

[0038] The above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The annealing furnace (1) includes a plurality of transfer rollers (2) rotatably mounted on the inner wall of the annealing furnace (1), A plurality of boron nitride rings (3) are fixedly fitted on the outer wall of each of the transfer rollers (2), a heat-resistant steel pipe (4) is installed on both sides of each transfer roller (2), a plurality of exhaust holes are installed on the outer wall of the heat-resistant steel pipe (4), and the heat-resistant steel pipe (4) communicates with an external hot air supply box, and a plurality of cleaning parts are installed on the inner bottom of the annealing furnace (1) to be used together with the transfer rollers (2); Roller table transfer device for electronic float glass.

2. A plurality of pairs of first support frames (5) are symmetrically fixed to the inner bottom of the annealing furnace (1), a lifting rod (6) is installed on the upper end surface of each of the first support frames (5), two mounting rings (7) are symmetrically fixedly fitted on the outer wall of each heat-resistant steel pipe (4), and the upper ends of the lifting rods (6) are fixedly connected to the outer walls of the mounting rings (7). The roller table transfer device for electronic float glass according to claim 1.

3. Each of the cleaning parts includes two second support frames (8) symmetrically fixed to the inner bottom of the annealing furnace (1), and the same mounting seats (9) are fixed to the upper end surfaces of the two second support frames (8), and a scraper (10) is installed in the mounting seats (9). The roller table transfer device for electronic float glass according to claim 1.

4. A lower penetration groove (11) is installed on the side wall of each mounting seat (9), a push-down plate (12) is movably installed in the lower penetration groove (11), and a scraper (10) is fixed to the upper end surface of the corresponding push-down plate (12), and the scraper (10) movably penetrates the mounting seat; 4. The roller table transfer device for electronic float glass according to claim 3.

5. Each of the heat-resistant steel pipes (4) is installed on both the left and right sides of each of the transition rollers (2), there is a certain gap between the scraper (10) and the outer wall of the boron nitride ring (3), and the scraper (10) is installed on the left side of the boron nitride ring (3); The roller table transfer device for electronic float glass according to claim 4.

6. A plurality of telescopic rods (13) are fixed between each of the lower through-holes (11) and the push-down plate (12), and a plurality of springs are fixed between the lower through-holes (11) and the push-down plate (12), and the springs are movably fitted on the outer walls of the telescopic rods (13). The roller table transfer device for electronic float glass according to claim 4.

7. An inclined scrap block (14) is fixed to the upper end surface of each of the mounting seats (9).

4. The roller table transfer device for electronic float glass according to claim 3.

8. The inclined scrap block (14) is attached to the scraper (10) by adhering it thereto, and the inclined surface of the inclined scrap block (14) is installed on the side facing the transfer roller (2). The roller table transfer device for electronic float glass according to claim 7.

9. Both sides of each of the press plates (12) are movable through the annealing furnace (1), and press-through tanks (15) are installed on both sides of the annealing furnace (1) to be used in conjunction with the press plates (12). The roller table transfer device for electronic float glass according to claim 4.

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