A high-generation large-tonnage substrate glass kiln feeding device and a feeding method

Abstract

This invention discloses a feeding device and method for a high-generation, large-tonnage substrate glass furnace, belonging to the field of high-generation substrate glass production technology. The feeding method includes two detachably mounted spiral feeders on the furnace base frame. The two spiral feeders can be selected and installed with a specific rotation direction combination according to the position and direction of the material pile on the left and right sides. This effectively solves the problem that when the feeding volume of a high-generation, large-tonnage furnace is large, the material pile easily deviates from its normal operating trajectory, leading to turbulent melting convection and melting abnormalities, resulting in melting defects. This method plays a positive role in stabilizing the furnace material pile and process, and avoids melting defects caused by this.

Description

Technical Field

[0001] This invention belongs to the field of high-generation substrate glass production technology, specifically relating to a feeding device and method for a high-generation large-tonnage substrate glass furnace, and particularly to key equipment for manufacturing special substrate glass, such as for LCD and OLED panels. Background Technology

[0002] Substrate glass is widely used in terminal display devices such as televisions, computer monitors, mobile phone screens and screen protection glass. However, producing high-quality substrate glass is a complex system engineering project. The furnace is an important piece of equipment for melting molten glass. With the continuous improvement of technology, breakthroughs in large-tonnage, high-generation furnace technology have become a key focus. As production capacity increases, existing furnace feeding equipment and methods have exposed new problems in the production process of high-yield, high-generation substrate glass. The problem of convection turbulence caused by furnace material pile deviation is particularly prominent. The instability of the melting process due to convection turbulence greatly limits the increase in production capacity and the development of large-tonnage production.

[0003] Chinese patent CN218620593U discloses a quick-change device for a feeder in front of a glass furnace, including a rotating and traveling mechanism. This device achieves rapid feeder replacement via a rotating arm and a traveling trolley, reducing replacement time and avoiding feeder wear and quality issues. However, under the conditions of continuous, large-volume feeding in high-generation, large-tonnage glass furnaces, this device cannot achieve real-time, active, and precise control of the three-dimensional spatial position of the feed pile within the furnace. This is insufficient to eliminate the technical problems caused by feed pile misalignment, such as instability in the melting thermal regime, turbulent glass convection, and resulting product melting defects. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention aims to provide a feeding device and feeding method for a high-generation, large-tonnage substrate glass furnace, in order to solve the technical problems of how to achieve real-time, active and precise control of the three-dimensional spatial position of the material pile in the furnace under the condition of continuous and large-scale feeding in a high-generation, large-tonnage glass furnace, so as to eliminate the technical problems of unstable melting thermal regime, glass melt convection disorder and product melting defects caused by material pile displacement.

[0005] To achieve the above objectives, the present invention employs the following technical solution: This invention provides a feeding method for a high-generation, large-tonnage substrate glass furnace, the feeding method comprising: S1. Provide a plurality of screw feeders, including at least two screw feeders configured to rotate clockwise and at least two screw feeders configured to rotate counterclockwise; the kiln base frame is provided with at least one left feeding port and one right feeding port. S2. Monitor the positions of the left and right material mounds formed within the kiln base frame relative to the expected running trajectory; S3. When the position of the left and / or right material piles is detected to be offset, two screw feeders are selected from several screw feeders according to the direction of the offset, and installed on the left and right feeding ports respectively; wherein, the rotation direction combination of the two selected screw feeders is adapted to the correction requirements to adjust the position of the left and / or right material piles to the non-offset position. S4. The two installed screw feeders are used to feed materials. The material throwing direction is determined by the combination of the selected rotation directions of the two screw feeders, and a directional pushing force is applied to the left and right material piles to make the left and right material piles return to the expected running trajectory.

[0006] Preferably, in step S3, the combination of rotation directions of the two selected screw feeders includes: (a) Both units rotate clockwise and are installed at the left and right feeding ports, respectively; (b) Both units rotate counterclockwise and are installed at the left and right feeding ports, respectively; (c) One screw feeder rotates clockwise and the other rotates counterclockwise. The clockwise rotating screw feeder is installed at the left feeding port and the counterclockwise rotating screw feeder is installed at the right feeding port. (d) One screw feeder rotates clockwise and the other rotates counterclockwise. The counterclockwise rotating screw feeder is installed at the left feeding port and the clockwise rotating screw feeder is installed at the right feeding port.

[0007] Preferably, the plurality of independent screw feeders are four units, two of which are fixedly configured to rotate clockwise and the other two are fixedly configured to rotate counterclockwise.

[0008] Preferably, in step S2, the positions of the left and right material piles are monitored by industrial television.

[0009] Preferably, the expected running trajectory is that the left and right material piles are symmetrically distributed in a figure-eight shape within the kiln interior space (6).

[0010] Preferred, When it is detected that the left material pile is shifting to the right and the right material pile is shifting to the left, select and install the two screw feeders of rotation direction combination (c); When it is detected that the left material pile shifts to the left and the right material pile shifts to the right, select and install two screw feeders with a rotation direction combination of (d).

[0011] The present invention also provides a feeding device for implementing the above-described feeding method, comprising: A kiln base frame; at least four screw feeders are detachably installed on the kiln base frame, two of which are configured to rotate only clockwise and the other two are configured to rotate only counterclockwise; the kiln base frame is also provided with a left feeding port and a right feeding port, and a device for monitoring the positional deviation of the left and / or right material piles formed within the kiln base frame is installed on the side of the kiln base frame opposite to the left and right feeding ports.

[0012] Preferably, each of the screw feeders is provided with a matching quick-connect coupling at its discharge end and at the inlet ends of the left and right feeding ports.

[0013] Preferably, the outer casing of the screw feeder is provided with a permanent rotation direction indicator.

[0014] Preferably, the device for monitoring the positional offset of the left and / or right material piles formed within the kiln base frame is an industrial television, and a lens hole is provided at the connection between the industrial television and the kiln base frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a feeding method for a high-generation, large-tonnage substrate glass furnace. When the left and right sides of the material pile in the furnace deviate from the expected running trajectory, a spiral feeder with a specific combination of rotation directions is selected and installed. The directional pushing force generated by the material being thrown is used to actively and directionally correct the deviated material pile, achieving the goal of adjusting the position and direction of the material pile. This effectively solves the problem that when the feeding volume of a high-generation, large-tonnage furnace is large, the material pile easily deviates from the expected (normal) running trajectory, leading to turbulent melting convection and melting abnormalities, resulting in melting defects. This method plays a positive role in stabilizing the furnace material pile and the process, and avoids melting defects caused by this. It achieves real-time, active, and precise control of the material pile's deviation position and direction.

[0016] Furthermore, the four adaptability options for rotation direction combinations provide a complete and definitive library of correction operations, covering all major offset scenarios that may occur in the material pile, such as same-direction and opposite-direction offsets. This makes the correction logic clear and executable, avoiding the arbitrariness and uncertainty of on-site operations, and facilitating precise control.

[0017] Furthermore, the specific number and fixed rotation direction configuration of the screw feeders (four units, two clockwise and two counterclockwise) are specified, ensuring the continuity and immediacy of the calibration capability from the equipment configuration perspective. At any time, regardless of the required combination of rotation directions, two backup units in the corresponding directions are available on-site for quick deployment and installation, avoiding calibration delays caused by a single equipment direction or the need for temporary adjustment of the rotation direction, thus supporting the requirements of real-time control.

[0018] Furthermore, industrial television was explicitly adopted as a monitoring method, enabling real-time, visualized monitoring of the material pile's location. Compared to inference from indirect parameters, industrial television can directly and continuously acquire three-dimensional spatial images of the material pile, making the determination of the direction and magnitude of the offset more accurate.

[0019] Furthermore, it was clarified that the expected operating trajectory is a symmetrical figure-eight distribution, which ensures the ideal material shape for uniform melting and thermal stability. This is defined as the target trajectory, which provides an objective standard for judging position deviation and verifying the correction effect, further improving the precision control.

[0020] Furthermore, the combination of two key rotation directions (c and d) further specifies and optimizes the correction logic, enabling the material pile to be efficiently corrected for phase offset, thereby improving the level of control intelligence and correction efficiency.

[0021] The present invention also provides a feeding device specifically for implementing the above-mentioned feeding method. By integrating a detachable screw feeder with a fixed rotation direction with a kiln base frame with left and right feeding ports and monitoring devices, a structure that can respond quickly and be flexibly configured is constructed.

[0022] Furthermore, quick-connect couplings have been added to the device, significantly reducing the time required for replacing and installing the screw feeder. This rapid equipment changeover minimizes disruption to continuous feeding processes and ensures timely calibration.

[0023] Furthermore, a permanent rotation direction indicator is installed on the screw feeder housing to prevent operational errors during emergency or rapid equipment changes. The clear indicator ensures that operators can accurately select the feeder with the required rotation direction for installation, guaranteeing the reliability of precise control in detail.

[0024] Furthermore, it was clarified that the monitoring device is an industrial television and lens aperture, making the device more adaptable to actual installation and observation needs (such as aperture position, viewing angle, high temperature protection, etc.), thus ensuring the feasibility and effectiveness of the monitoring function. Attached Figure Description

[0025] Figure 1 This is a top view of the kiln apparatus of the present invention; Figure 2This is a side view of the kiln apparatus of the present invention; Wherein: 1-Screw feeder; 2-Feeding port; 3-Material pile; 4-Left material pile; 5-Right material pile; 6-Interior space of kiln; 7-Liquid level line; 8-Molten glass; 9-Left feeding port; 10-Right feeding port; 11-Industrial TV; 12-Lens hole. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1 This embodiment provides a feeding method for a high-generation, large-tonnage substrate glass furnace, combined with... Figure 1 and Figure 2 As shown, a feeding port 2 is provided on one side of the kiln base frame, the feeding port 2 including a left feeding port 9 and a right feeding port 10. The method specifically includes the following steps: S1. Equipment Preparation: Prepare four independent screw feeders 1. Two of them are pre-configured and mechanically locked to rotate only clockwise, defined as clockwise feeders, and the other two are pre-configured and locked to rotate only counterclockwise, defined as counterclockwise feeders. These four feeders are placed in the reserved position on the kiln base frame as backup units.

[0029] S2. Status Monitoring: The interior of the kiln is monitored in real time via an industrial television 11 installed at an observation hole on the kiln base frame. The lens of the industrial television 11 passes through a lens hole 12 opened on the kiln base frame to acquire an image of the material pile 3 above the glass melt level 7 in the internal space 6 of the kiln. Operators or an image analysis system use this image to determine the positions of the left material pile 4 and the right material pile 5, and to correlate them with the expected symmetrical figure-eight running trajectory, such as... Figure 1 Compare with the normal state shown to determine if there is any offset and the direction of the offset; S3. Decision and Replacement: When a position shift is detected between the left feed chute 4 and / or the right feed chute 5, select two screw feeders from the four screw feeders 1 according to the shift, and replace them at the left feed inlet 9 and the right feed inlet 10. There are four possible combinations of selection and installation: (a) Left-hand clockwise, right-hand clockwise: Both feeders rotate clockwise; (b) Left counterclockwise, right counterclockwise: Both feeders rotate counterclockwise; (c) Left clockwise, right counterclockwise: one unit rotates clockwise and the other unit rotates counterclockwise. The clockwise rotating screw feeder is installed at the left feeding port 9 and the counterclockwise rotating screw feeder is installed at the right feeding port 10. (d) Left counterclockwise, right clockwise: one unit rotates clockwise and the other unit rotates counterclockwise. The counterclockwise rotating screw feeder is installed at the left feeding port 9, and the clockwise rotating screw feeder is installed at the right feeding port 10. Specifically, for example, when it is detected that the left-side material pile 4 shifts to the right and the right-side material pile 5 shifts to the left, it means that both material piles 3 are moving closer to the center of the kiln. The material piles 3 include the left-side material pile 4 and the right-side material pile 5. In this case, combination (c) should be selected, namely "left clockwise, right counterclockwise". The left-side clockwise rotating feeder throws the material to the right, and the right-side counterclockwise rotating feeder throws the material to the left, working together to push and correct the material piles on both sides outward. Conversely, if both the left-side material pile 4 and the right-side material pile 5 deviate outward, then combination (d) "left counterclockwise, right clockwise" should be selected, throwing the material towards the center, causing the left-side material pile 4 and the right-side material pile 5 to converge towards the center; S4. Operational Correction: Start the two installed screw feeders 1 to feed material. The material, by virtue of the selected rotation direction combination, generates a directional pushing force on the left material pile 4 and the right material pile 5. Continue operation until the industrial television 11 monitors and displays that the position of the material piles has returned to the expected symmetrical figure-eight trajectory.

[0030] Example 2 This embodiment provides a feeding device for implementing the feeding method described in Embodiment 1, such as... Figure 1 and Figure 2 As shown.

[0031] The feeding device includes a robust kiln base frame (not shown separately in the diagram), which serves as the foundation structure supporting the following components. Four independent screw feeders 1 are detachably mounted on this kiln base frame. Two of the screw feeders 1 have their drive mechanisms fixed for clockwise rotation only, with the character "clockwise" or an arrow marking their outer casing as a permanent indication of the rotation direction. The other two are fixed for counter-clockwise rotation only and are marked with the character "counter-clockwise". These four screw feeders are placed side-by-side in a preparatory position. A feeding port 2 is located on one side of the kiln base frame, including a left feeding port 9 and a right feeding port 10. The kiln base frame contains the kiln's internal space 6.

[0032] A feeding interface is fixedly installed at the position corresponding to the side wall of the kiln body on the kiln base frame. This interface has a left feeding port 9 and a right feeding port 10 that communicate with the internal space 6 of the kiln. The discharge end of each screw feeder 1, as well as the inlet end of the left feeding port 9 and the right feeding port 10, are equipped with matching quick-connect couplings, such as pneumatic or manual clamp couplings, to achieve quick and sealed connection and disassembly between the feeder and the feeding port 2. The internal space 6 of the kiln contains a 4-left material hill and a 5-right material hill, which are formed by feeding material into the internal space 6 of the kiln through two selected screw feeders 1. The 4-left material hill and the 5-right material hill are formed above the liquid level line 7, and the liquid glass 8 is below the liquid level line 7.

[0033] On the kiln base frame, on the side opposite to the left feeding port 9 and the right feeding port 10, typically the rear or upper part of the kiln directly facing the feeding ports, a device for monitoring the positional deviation of the material pile 3 is installed. In this embodiment, the monitoring device is an industrial television 11. The high-temperature resistant camera probe of the industrial television 11 extends into the kiln through lens holes 12 opened on the kiln base frame and the kiln wall, thereby directly observing the real-time shape and position of the left material pile 4 and the right material pile 5. The material pile 3 includes the left material pile 4 and the right material pile 5. The industrial television 11 can be an AB-NTV-1-01 endoscopic electric type from Anbang Information Technology Co., Ltd.; the screw feeder 1 can be a high-temperature resistant screw feeder (series products) from Shandong Luguan Glass Machinery Co., Ltd.

[0034] With this monitoring device, the operator can manually select two of the four screw feeders 1 marked with rotation directions based on the offset of the left material pile 4 and the right material pile 5 observed by the industrial television 11, and install them on the left feeding port 9 and the right feeding port 10 through quick-connect couplings to form the required rotation direction combination, thereby correcting the position of the left material pile 4 and the right material pile 5.

[0035] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A feeding method for a high-generation, large-tonnage substrate glass furnace, characterized in that, The feeding method includes: S1. Provide a plurality of screw feeders (1), including at least two screw feeders configured to rotate clockwise and at least two screw feeders configured to rotate counterclockwise; the kiln base frame is provided with at least one left feeding port (9) and one right feeding port (10). S2. Monitor the positions of the left and right material mounds (4 and 5) formed within the kiln base frame relative to the expected running trajectory; S3. When the position of the left material mountain (4) and / or the right material mountain (5) is detected to be offset, two screw feeders (1) are selected from several screw feeders (1) according to the direction of the offset, and installed on the left feeding port (9) and the right feeding port (10) respectively; wherein, the rotation direction combination of the two selected screw feeders (1) is adapted to the correction requirements to adjust the position of the left material mountain (4) and / or the right material mountain (5) to the position without offset; S4. The two installed screw feeders (1) are used to feed materials. The material throwing direction is determined by the combination of the rotation directions selected by the two screw feeders (1). A directional pushing force is applied to the left material pile (4) and the right material pile (5) so that the left material pile (4) and the right material pile (5) return to the expected running trajectory.

2. The feeding method according to claim 1, characterized in that, In step S3, the rotation direction combinations of the two selected screw feeders (1) include: (a) Both units rotate clockwise and are installed at the left feeding port (9) and the right feeding port (10) respectively. (b) Both units rotate counterclockwise and are installed at the left feeding port (9) and the right feeding port (10) respectively. (c) One screw feeder rotates clockwise and the other rotates counterclockwise. The clockwise rotating screw feeder is installed at the left feeding port (9) and the counterclockwise rotating screw feeder is installed at the right feeding port (10). (d) One screw feeder rotates clockwise and the other rotates counterclockwise. The counterclockwise rotating screw feeder is installed at the left feeding port (9) and the clockwise rotating screw feeder is installed at the right feeding port (10).

3. The feeding method according to claim 1, characterized in that, The plurality of independent screw feeders (1) consist of four units, two of which are fixedly configured to rotate clockwise and the other two are fixedly configured to rotate counterclockwise.

4. The feeding method according to claim 1, characterized in that, In step S2, the positions of the left material pile (4) and the right material pile (5) are monitored by an industrial television (11).

5. The feeding method according to claim 1, characterized in that, The expected running trajectory is that the left material mountain (4) and the right material mountain (5) are symmetrically distributed in a figure-eight shape within the kiln interior space (6).

6. The feeding method according to claim 2, characterized in that, When it is detected that the left material pile (4) shifts to the right and the right material pile (5) shifts to the left, select and install the two screw feeders (1) of the rotation direction combination (c); When it is detected that the left material pile (4) shifts to the left and the right material pile (5) shifts to the right, select and install two screw feeders (1) with the rotation direction combination (d).

7. A feeding device for implementing the feeding method according to any one of claims 1 to 6, characterized in that, include: Kiln base frame; At least four screw feeders (1) are detachably installed on the kiln base frame, two of which are configured to rotate only clockwise and the other two are configured to rotate only counterclockwise. The kiln base frame is also provided with a left feeding port (9) and a right feeding port (10). On the kiln base frame located on the side opposite to the left feeding port (9) and the right feeding port (10), a device is provided to monitor the positional deviation of the left material hill (4) and / or the right material hill (5) formed in the kiln base frame.

8. The feeding device according to claim 7, characterized in that, Each of the spiral feeders (1) is provided with a matching quick-connect connector at its discharge end and at the inlet ends of the left feed port (9) and right feed port (10).

9. The feeding device according to claim 7, characterized in that, The spiral feeder (1) has a permanent rotation direction marking on its housing.

10. The feeding device according to claim 7, characterized in that, The device for monitoring the positional offset of the left material hill (4) and / or right material hill (5) formed within the kiln base frame is an industrial television (11), and a lens hole (12) is opened at the connection between the industrial television (11) and the kiln base frame.

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