TFT liquid crystal glass raw material deironing magnetic grid automatic adjusting device and method

Abstract

The invention provides a TFT liquid crystal glass raw material deironing magnetic grid automatic adjusting device and method. The TFT liquid crystal glass raw material deironing magnetic grid automatic adjusting device comprises a blanking pipe cavity, an executing mechanism and a control system. The executing mechanism comprises strong magnetic bars, hinge mechanisms, a screw rod, a spiral propeller and the like, and the distance between the strong magnetic bars can be adjusted. The control system comprises a working material level detector and an upper limit material level detector and can achieve automatic adjustment and control over the distance between the strong magnetic bars. The gaps between the strong magnetic bars are reasonably adjusted in time, the magnetic grid is kept in the optimal iron removal state all the time, the risk that raw materials are accumulated, blocked and broken due to unreasonable gaps is completely eradicated, field dust pollution in the magnetic grid replacement process is avoided, the body health of workers is ensured, and the production efficiency is improved. And meanwhile, the workload of replacing the magnetic grid and the expense of processing spare parts of the magnetic grid are also avoided, and the production line efficiency and the management and control of the operation cost of a company are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of TFT glass manufacturing, and in particular to a device and method for automatically adjusting ferromagnetic grids of raw materials of TFT liquid crystal glass. Background Art

[0002] In the process of TFT liquid crystal glass production and manufacturing, due to the extremely high requirements for glass quality, the system is designed with a platinum channel to heat, clarify, homogenize, cool and other processes on the glass melt to meet the requirements of the molding process and product quality. Since the platinum channel is made of platinum-rhodium alloy, contact with iron foreign matter at high temperature will cause platinum-rhodium alloy poisoning, which will affect the product yield at the least, and will cause the platinum channel to be poisoned and damaged, and the glass liquid will leak out, resulting in the scrapping of the production line. Therefore, in the process of TFT liquid crystal glass production and manufacturing, the management of iron foreign matter in the raw materials is particularly important; usually, an iron removal device is designed on the raw material batching system and the kiln feeding system. The existing technology is to design a strong magnetic grid at each drop port of the batching system and the kiln feeding system to absorb the iron foreign matter in the raw materials. The magnetic grid uses multiple strong magnetic bars fixed at equal intervals horizontally, and the raw materials are washed from the top of the magnetic grid to achieve the purpose of strong magnetic bars adsorbing iron foreign matter in the raw materials.

[0003] The specific size selection of the magnetic grid needs to consider the instantaneous flow rate of raw materials flowing through the magnetic grid to determine the diameter of the strong magnetic rods and the spacing between the strong magnetic rods. If the spacing between the strong magnetic rods is too small, the raw materials will not flow smoothly, and the raw materials will accumulate and block on the magnetic grid, causing the raw materials to break, affecting the normal order of production; and increasing the spacing between the strong magnetic rods can avoid the risk of raw material accumulation and blockage, but if the spacing between the strong magnetic rods is too large, some raw materials will not pass through the strong magnetic rods, resulting in poor removal effect of iron foreign matter by the magnetic grid, affecting the safe operation of the platinum channel; at the same time, because the strong magnetic rods are fixed on the magnetic grid frame with equal spacing, the spacing of the strong magnetic rods is fixed, and after the raw material flow rate at the magnetic grid installation part is adjusted in time, the strong magnetic rods cannot meet the iron removal requirements under different flow rates, which will cause raw material accumulation and blockage or poor iron removal effect, and the magnetic grid of the corresponding size needs to be replaced. Although the replacement of the magnetic grid meets the production needs, it increases the company's operating costs. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for automatically adjusting the magnetic grid for removing iron from raw materials of TFT liquid crystal glass, so as to overcome the problems existing in the prior art. The present invention can realize automatic adjustment and control of the magnetic grid spacing, and keep the magnetic grid in the best iron removal state at all times by timely and reasonably adjusting the gap between strong magnetic rods, thereby eliminating the risks of raw material accumulation, blockage and material interruption caused by unreasonable gaps, avoiding on-site dust pollution during the replacement of the magnetic grid, ensuring the health of employees, and at the same time avoiding the workload of replacing the magnetic grid and the expense of processing magnetic grid spare parts, thereby greatly improving the production line efficiency and the control of the company's operating costs.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: An automatic adjustment device for removing ferromagnetic grids from raw materials of TFT liquid crystal glass, comprising a blanking tube cavity, an actuator and a control system; Furthermore, the actuator includes a magnetic grid mechanism installed inside the blanking tube cavity, the magnetic grid mechanism includes several layers of magnetic grids, a magnetic bar fixed frame is installed inside each layer of magnetic grids, there is a gap between the magnetic grids and the magnetic bar fixed frame, several strong magnetic bars are installed inside the magnetic bar fixed frame, and several strong magnetic bars between two adjacent layers of magnetic grids are installed in an up-and-down staggered manner; two end heads of the magnetic bar fixed frame are provided with slide grooves, and two end heads of the strong magnetic bars are installed in the slide grooves; a hinge mechanism is fixed to the outside of the magnetic bar fixed frame, and a screw is installed at one end of the hinge mechanism, the screw passes through the blanking tube cavity and is connected to a screw propeller, and the screw propeller is controlled by a servo motor; a fixed block is installed between the strong magnetic bar farthest from the screw and the magnetic bar fixed frame; Furthermore, the control system includes a working material level detector, which is installed above the uppermost magnetic grid, and an upper limit material level detector is installed above the working material level detector; Furthermore, the screw includes a smooth non-threaded portion connected to the hinge mechanism and a threaded portion connected to the screw propeller, and a silicone seal is provided at the smooth non-threaded portion penetrating through the blanking tube cavity; Further, the screw propeller is mounted on a rotating shaft, and the rotating shaft is connected to the servo motor through a coupling; Further, the working material level detector includes a working detection probe, which is installed inside the blanking tube cavity, and the working detection probe passes through the barrel wall of the blanking tube cavity and is connected to the working material level drive motor; the upper limit material level detector includes an upper limit detection probe, which is installed inside the blanking tube cavity, and the upper limit detection probe passes through the barrel wall of the blanking tube cavity and is connected to the upper limit material level drive motor; Furthermore, material level blades are installed on the working detection probe and the upper limit detection probe; Furthermore, a support frame plate is installed on the outer wall of the blanking tube cavity, and the spiral propeller is installed on the support frame plate.

[0006] A method for automatically adjusting the ferromagnetic grid of a TFT liquid crystal glass raw material, based on the above-mentioned automatic adjustment device for automatically adjusting the ferromagnetic grid of a TFT liquid crystal glass raw material, comprises the following steps: (1) Install an automatic adjustment device for the raw material iron removal magnetic grid in the kiln feeding system and perform initial process settings through the kiln control system: Set the delay time of the working material level detector when there is no material; the delay time of the upper limit material level detector when there is material; the delay time after the strong magnetic bar gap is increased; the size of each movement when the strong magnetic bar gap is increased; the delay time after the strong magnetic bar gap is reduced; the size of each movement when the strong magnetic bar gap is reduced; (2) After the kiln control system completes the initial process setting, the device starts to operate according to the set process, and the magnetic selection state of the magnetic grid is determined by the working material level detector and the upper limit material level detector: If the working material level detector detects that there is raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; If the working material level detector does not detect any raw material retention, execute (3); If the upper limit material level detector detects that there is raw material retention, execute (4); If the upper limit material level detector does not detect any raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; (3) Feedback the material-free signal to the control system. When the material-free time reaches the set delay time, the control system issues an instruction to reduce the gap between the strong magnetic bars. After receiving the instruction from the control system to reduce the gap between the strong magnetic bars, the servo motor drives the screw propeller to rotate and push the hinge mechanism to contract, thereby reducing the gap between the strong magnetic bars. The magnetic grid gap is adjusted according to the set movement size of the strong magnetic bars each time. After completing the gap reduction adjustment, the control system delays the effect verification time. After the effect verification delay time is reached, the control system determines whether further adjustment is required based on the detection result of the working material level detector. If no raw material is still detected, execute (3) again; If it is detected that there is raw material retention, the control system stops adjusting and maintains the current state to remove iron from the raw materials; (4) Feedback the material presence signal to the control system. When the material presence time reaches the set delay time, the control system issues an instruction to increase the gap between the strong magnetic rods. After receiving the instruction from the control system to increase the gap between the strong magnetic rods, the servo motor drives the screw propeller to rotate and pull the hinge mechanism to stretch, thereby increasing the gap between the strong magnetic rods. The magnetic grid gap is adjusted according to the set movement size of the strong magnetic rods each time. After completing the gap increase adjustment once, the control system delays the effect verification time. After the effect verification delay time is reached, the control system determines whether further adjustment is required based on the detection result of the upper limit material level detector. If it is still detected that there is raw material retention, execute (4) again; If no raw material is detected to be retained, the control system stops adjusting and maintains the current state to remove iron from the raw materials; Furthermore, the iron removal is specifically as follows: the servo motor drives the rotating shaft to rotate, the rotating shaft drives the screw propeller to rotate, the screw propeller pushes the screw to push and pull the hinge mechanism, and the hinge mechanism drives the magnetic grid to move horizontally; when the iron-containing material passes through, it is attracted by the strong magnetic rod in the magnetic grid, and the iron-containing material is adsorbed on the tube wall of the strong magnetic rod; Furthermore, a material level blade is installed on the working material level detector. The working material level detector detects whether there is raw material retention specifically as follows: the working material level driving motor drives the material level blade to rotate. When the material level blade contacts the raw material, the raw material generates resistance to the material level blade. The working material level detector is defined as the presence of raw material in the working material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance. The working material level detector is defined as the absence of raw material in the working material level detection area. Furthermore, a material level blade is installed on the upper limit material level detector, and the upper limit material level detector detects whether there is raw material retention specifically as follows: the upper limit material level drive motor drives the material level blade to rotate, and when the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector is defined as the presence of raw materials in the upper limit material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the upper limit material level detector is defined as the absence of raw materials in the upper limit material level detection area.

[0007] The above technical solution has the following advantages or beneficial effects: The present invention provides an automatic adjustment device for removing iron from magnetic grids of raw materials for TFT liquid crystal glass. The adjustment of the spacing between the strong magnetic bars is achieved by arranging upper and lower staggered installation between the strong magnetic bars of two adjacent layers of magnetic grids, hinge mechanisms, screws, screw propellers, transmission shafts, servo motors, slide grooves, etc.; automatic adjustment and control of the spacing between the strong magnetic bars is achieved by arranging a working material level detector and an upper limit material level detector above the magnetic grid; the present invention can reasonably adjust the spacing between the magnetic bars according to the material discharge state, avoiding the risk of raw material accumulation and blockage caused by too small a gap between the strong magnetic bars, and at the same time ensuring to the maximum extent that the magnetic grid is always in the best iron removal state, ensuring the safe operation of the platinum channel; the magnetic grid of the present invention can be suitable for the use requirements of different material discharge amounts, and there is no need to replace the magnetic grid of the corresponding size after the material discharge amount is adjusted, thereby avoiding the workload of replacing the magnetic grid, greatly reducing the cost of processing magnetic grid spare parts, and effectively reducing the production line efficiency and the company's operating costs.

[0008] Furthermore, by providing a silicone seal, the dust sealing problem can be effectively solved to prevent dust from leaking when passing through the blanking pipe cavity, thereby affecting the iron removal effect and the normal operation of the device.

[0009] Furthermore, by installing working detection probes and upper limit detection probes, the device can monitor the raw material level in real time and accurately. This real-time monitoring capability enables the system to automatically adjust the feed speed or stop feeding, thereby avoiding production interruptions or waste caused by too high or too low a level, and significantly improving production efficiency and automation levels; by setting level blades, continuous monitoring of raw materials can be achieved to ensure that the position and level of raw materials can be grasped in time throughout the production process; at the same time, accurate detection of the position of raw materials can also be achieved, thereby improving the detection accuracy and reliability of the entire device; intelligent control is performed according to the detection results of the level blades to achieve automatic adjustment of the gap between strong magnetic bars.

[0010] Furthermore, by installing the support frame plate, a stable installation foundation is provided for the screw propeller, ensuring the stability and reliability of the screw propeller during operation, helping to reduce equipment damage caused by vibration or impact and extending the service life of the equipment.

[0011] The present invention provides a method for automatically adjusting a magnetic grid for removing iron from raw materials of TFT liquid crystal glass. The control system continuously operates according to the process parameters set by the kiln control system, and timely and reasonably adjusts the gap between the strong magnetic rods to keep the magnetic grid in the best iron removal state at all times, thereby eliminating the risks of raw material accumulation, blockage and material interruption caused by unreasonable gaps between the strong magnetic rods, avoiding on-site dust pollution during the replacement of the magnetic grid, ensuring the health of employees, and simultaneously avoiding the cost expenditure of processing and replacing magnetic grid spare parts, thereby greatly improving the production line efficiency and the control of the company's operating costs.

[0012] Furthermore, the entire iron removal process is driven and controlled by automated equipment such as servo motors, achieving a high degree of automation and intelligence. The operator only needs to set relevant parameters through the control system to achieve precise control and management of the iron removal process, reducing labor costs and improving production safety. At the same time, in the process of raw materials flushing the magnetic grid, the strong magnetic bars in the magnetic grid will separate the raw materials and magnetically separate iron foreign matter, effectively eliminating the iron foreign matter in the raw materials, so that the raw materials can be optimally magnetically separated, and the accuracy of iron removal is improved.

[0013] Furthermore, the working level detector and the upper limit level detector detect the retention of raw materials in the device through the level blades, thereby improving the accuracy and reliability of iron removal; at the same time, it also realizes the automated detection and management of the retention of raw materials, improves production efficiency, and reduces difficulty and error rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an automatic adjustment device for removing ferromagnetic grids from raw materials of TFT liquid crystal glass; Figure 2 It is a structural schematic diagram of the actuator of the automatic adjustment device for removing the ferromagnetic grid of the raw material of TFT liquid crystal glass; Figure 3 It is a top view of the single-layer magnetic grid structure of the ferromagnetic grid automatic adjustment device of the raw material of TFT liquid crystal glass; In the figure, 1-feeding tube cavity; 2-working material level detector; 201-working detection probe; 202-working material level drive motor; 3-upper limit material level detector; 301-upper limit detection probe; 302-upper limit material level drive motor; 4-strong magnetic rod; 5-magnetic rod fixed frame; 6-hinge mechanism; 7-screw; 8-screw propeller; 9-servo motor; 10-silicone seal; 11-support frame plate; 12-rotating shaft; 13-coupling; 14-slide; 15-fixed block. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it. In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 should fall within the scope of protection of the present invention. It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0016] Embodiment 1: like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides an automatic adjustment device for removing iron magnetic grids from raw materials of TFT liquid crystal glass, comprising a blanking tube cavity 1, an actuator and a control system; the actuator comprises a magnetic grid mechanism installed inside the blanking tube cavity 1, the magnetic grid mechanism comprises several layers of magnetic grids, a magnetic bar fixed frame 5 is installed inside each layer of magnetic grids, there is a gap between the magnetic grids and the magnetic bar fixed frame 5, several strong magnetic bars 4 are installed inside the magnetic bar fixed frame 5, and several strong magnetic bars 4 between two adjacent layers of magnetic grids are installed in an upper and lower staggered manner; two end heads of the magnetic bar fixed frame 5 are provided with slide grooves 14, and two end heads of the strong magnetic bar 4 are installed in the slide grooves 14; a hinge mechanism 6 is fixed to the outside of the magnetic bar fixed frame 5, and a screw 7 is installed at one end of the hinge mechanism 6, and the screw 7 passes through the blanking tube cavity 1 and is connected to a screw propeller 8, The screw propeller 8 is controlled by a servo motor 9; a fixed block 15 is installed between the strong magnetic bar 4 farthest from the screw 7 and the magnetic bar fixed frame 5; the control system includes a working material level detector 2, which is installed above the uppermost magnetic grid, and an upper limit material level detector 3 is installed above the working material level detector 2; the working material level detector 2 includes a working detection probe 201, which is installed inside the blanking tube cavity 1, and the working detection probe 201 passes through the barrel wall of the blanking tube cavity 1 and is connected to the working material level drive motor 202; the upper limit material level detector 3 includes an upper limit detection probe 301, which is installed inside the blanking tube cavity 1, and the upper limit detection probe 301 passes through the barrel wall of the blanking tube cavity 1 and is connected to the upper limit material level drive motor 302; Preferably, the screw 7 includes a smooth non-threaded portion connected to the hinge mechanism 6 and a threaded portion connected to the screw propeller 8, and a silicone seal 10 is provided at the smooth non-threaded portion penetrating through the blanking tube cavity 1; Preferably, the screw propeller 8 is mounted on a rotating shaft 12, and the rotating shaft 12 is connected to the servo motor 9 via a coupling 13; Preferably, material level blades are installed on the working detection probe 201 and the upper limit detection probe 301; Preferably, a support frame plate 11 is installed on the outer wall of the blanking tube cavity 1 , and the screw propeller 8 is installed on the support frame plate 11 .

[0017] The present invention provides a method for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass. The above-mentioned automatic adjustment device for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass comprises the following steps: (1) Install an automatic adjustment device for the raw material iron removal magnetic grid in the kiln feeding system and perform initial process settings through the kiln control system: Set the delay time of working material level detector 2 without material; the delay time of upper limit material level detector 3 with material; the delay time after the gap between strong magnetic rod 4 is increased; the size of each movement after the gap between strong magnetic rod 4 is increased; the delay time after the gap between strong magnetic rod 4 is decreased; the size of each movement after the gap between strong magnetic rod 4 is decreased; (2) After the kiln control system completes the initial process setting, the device starts to operate according to the set process, and the magnetic selection state of the magnetic grid is determined by the working material level detector 2 and the upper limit material level detector 3: If the working material level detector 2 detects that there is raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw material; If the working material level detector 2 does not detect any raw material retention, execute (3); If the upper limit material level detector 3 detects that there is raw material retention, execute (4); If the upper limit material level detector 3 does not detect any raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; (3) Feedback the material-free signal to the control system. When the material-free time reaches the set delay time, the control system issues an instruction to reduce the gap between the strong magnetic rods 4. After receiving the instruction from the control system to reduce the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and push the hinge mechanism 6 to contract, thereby reducing the gap between the strong magnetic rods 4. The magnetic grid gap is adjusted according to the set movement size of the strong magnetic rods 4 each time. After completing the gap reduction adjustment once, the control system delays the effect verification time. After the effect verification delay time is reached, the control system determines whether adjustment is required based on the detection result of the working material level detector 2. If no raw material is still detected, execute (3) again; If it is detected that there is raw material retention, the control system stops adjusting and maintains the current state to remove iron from the raw materials; (4) Feedback the material presence signal to the control system. When the material presence time reaches the set delay time, the control system issues an instruction to increase the gap between the strong magnetic rods 4. After receiving the instruction from the control system to increase the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and pull the hinge mechanism 6 to stretch, thereby increasing the gap between the strong magnetic rods 4, and adjusting the magnetic grid gap according to the set size of each movement of the strong magnetic rods 4. After completing the gap increase adjustment once, the control system delays the effect verification time. After the effect verification delay time is reached, the control system determines whether adjustment is required based on the detection result of the upper limit material level detector 3. If it is still detected that there is raw material retention, execute (4) again; If no raw material is detected to be retained, the control system stops adjusting and maintains the current state to remove iron from the raw materials; Preferably, the iron removal process is specifically as follows: the servo motor 9 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the screw propeller 8 to rotate, the screw propeller 8 pushes the screw 7 to push and pull the hinge mechanism 6, and the hinge mechanism 6 drives the magnetic grid to move horizontally; when the iron-containing material passes through, it is attracted by the strong magnetic rod 4 in the magnetic grid, and the iron-containing material is adsorbed on the tube wall of the strong magnetic rod 4; Preferably, a material level blade is installed on the working material level detector 2. The specific process of the working material level detector 2 detecting whether there is raw material retention is as follows: the working material level drive motor 202 drives the material level blade to rotate. When the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector 2 is defined as the presence of raw material in the working material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the working material level detector 2 is defined as the absence of raw material in the working material level detection area; Preferably, a level blade is installed on the upper limit material level detector 3, and the specific process of the upper limit material level detector 3 detecting whether there is any raw material retained is: the upper limit material level drive motor 302 drives the level blade to rotate, and when the level blade contacts the raw material, the raw material generates resistance to the level blade, and the working level detector 3 is defined as the upper limit material level detection area having raw materials; when the level blade does not contact the raw material, the level blade does not generate resistance, and the upper limit material level detector 3 is defined as the upper limit material level detection area having no raw materials.

[0018] Embodiment 2: like Figure 1As shown, the present invention provides an automatic adjustment device for removing iron from magnetic grids of raw materials of TFT liquid crystal glass, comprising a blanking tube cavity 1, an actuator and a control system; the actuator comprises a magnetic grid mechanism installed inside the blanking tube cavity 1, the magnetic grid mechanism comprises a plurality of layers of magnetic grids, a magnetic bar fixing frame 5 is installed inside each layer of magnetic grids, a plurality of strong magnetic bars 4 are installed inside the magnetic bar fixing frame 5, a plurality of strong magnetic bars 4 between two adjacent layers of magnetic grids are installed in an upper and lower staggered manner, the raw materials are flushed with the strong magnetic bars 4 when passing through the upper magnetic grid, the strong magnetic bars 4 divide the raw materials into two powders and fall to the lower magnetic grid, the strong magnetic bars 4 of the lower magnetic grid divide the raw materials again, the more layers of magnetic grids are installed, the more times the raw materials are divided, and the stronger the iron removal ability is; Preferably, the strong magnetic rod 4 is made of high-quality stainless steel tube and high B value rare earth alloy neodymium iron boron, and is made by a special manufacturing method, and can be combined on the magnetic rod fixed frame 5 to form a magnetic filter; when the iron-containing material passes through, it is attracted by the strong magnetic rod 4, and the iron-containing material is firmly adsorbed on the tube wall of the strong magnetic rod 4, so as to achieve the effect of removing iron foreign matter in the raw material; Preferably, the surface shell of the strong magnetic rod 4 is made of SUS304 material and is mirror-polished. The strength of the strong magnetic rod 4 is 12000-14000 GS. The outer diameter and length of the strong magnetic rod 4 are determined according to the flow rate of the use part. The outer diameter is 6mm-60mm and the length is 100-1000 mm. Preferably, the length and number of the strong magnetic rods 4 need to be larger than the raw material feeding area, providing sufficient magnetic grid iron removal area to meet the maximum contact area between the strong magnetic rods 4 and the raw material, thereby obtaining the best iron removal effect; Preferably, the blanking tube cavity 1 and the magnetic bar fixed frame 5 are made of 1Cr13 material; wherein the blanking tube cavity 1 is processed into a square shape, serving as a support mechanism for the working material level detector 2, the upper limit material level detector 3 and the magnetic grid mechanism to improve the iron removal capacity; Preferably, the magnetic bar fixed frame 5 determines the specific size of the fixed frame plate according to the size of the installation part and the selection of the strong magnetic bar 4, the plate thickness is 3-20 mm, and the plate height is 10-70 mm; Preferably, the magnetic bar fixing frame 5 is a square frame; Preferably, the control system includes a working material level detector 2 and an upper limit material level detector 3, which are used as a detection of the material discharge state of the magnetic grid, and the material level detection signal is uploaded to the raw material batching system or the kiln control system; Preferably, the working material level detector 2 is installed above the uppermost magnetic grid, the working material level detector 2 includes a working detection probe 201, the working detection probe 201 is installed inside the blanking tube cavity 1, the working detection probe 201 penetrates the barrel wall of the blanking tube cavity 1 and is connected to the working material level drive motor 202, the working detection probe 201 and the working material level drive motor 202 are connected and fixed to the blanking tube cavity 1 using internal and external threads; the upper limit material level detector 3 is installed above the working material level detector 2, the upper limit material level detector 3 includes an upper limit detection probe 301, the upper limit detection probe 301 is installed inside the blanking tube cavity 1, the upper limit detection probe 301 penetrates the barrel wall of the blanking tube cavity 1 and is connected to the upper limit material level drive motor 302, the upper limit detection probe 301 and the upper limit material level drive motor 302 are connected and fixed to the blanking tube cavity 1 using internal and external threads The cavity 1 is fixed to realize the automatic adjustment and control of the spacing between the strong magnetic bars 4; by installing the working detection probe 201 and the upper limit detection probe 301, the device can monitor the raw material level in real time and accurately. This real-time monitoring capability enables the system to automatically adjust the feeding speed or stop feeding, thereby avoiding production interruption or waste caused by too high or too low material level, significantly improving production efficiency and automation level; avoiding the risk of raw material accumulation and blockage caused by too small gaps between the strong magnetic bars 4, and ensuring that the magnetic grid is always in the best iron removal state to the maximum extent, ensuring the safe operation of the platinum channel; the magnetic grid can also be suitable for the use requirements of different feeding amounts. After the feeding amount is adjusted, there is no need to replace the magnetic grid of the corresponding size, avoiding the workload of replacing the magnetic grid, greatly reducing the cost of processing magnetic grid spare parts, and effectively reducing the production line efficiency and the company's operating costs; Preferably, material level blades are installed on the working detection probe 201 and the upper limit detection probe 301, which can realize continuous monitoring of the raw materials, ensuring that the position and material level of the raw materials can be timely grasped throughout the production process; at the same time, it can also realize accurate detection of the position of the raw materials, thereby improving the detection accuracy and reliability of the entire device; Preferably, a support frame plate 11 is installed on the outer wall of the blanking tube cavity 1, and the screw propeller 8 is fixed to the mounting bracket 11 with bolts, providing a stable installation foundation for the screw propeller 8, ensuring the stability and reliability of the screw propeller 8 during operation, helping to reduce equipment damage caused by vibration or impact, and extending the service life of the equipment.

[0019] like Figure 2 As shown, there is a gap between the magnetic grid and the magnetic bar fixed frame 5, a hinge mechanism 6 is fixed to the outside of the magnetic bar fixed frame 5, a screw 7 is installed at one end of the hinge mechanism 6, the screw 7 passes through the blanking tube cavity 1 and is connected to the screw propeller 8, the screw propeller 8 is installed on the rotating shaft 12, and the rotating shaft 12 is connected to the servo motor 9 through the coupling 13; a fixed block 15 is installed between the strong magnetic bar 4 farthest from the screw 7 and the magnetic bar fixed frame 5; Preferably, the hinge mechanism 6 and the screw rod 7 are made of 1Cr13 material; wherein, the hinge mechanism 6 is made of 1Cr13 plate, the plate thickness is 2-10 mm, the plate width is 6-30 mm, the intersection between the hinge mechanism 6 and the strong magnetic rod 4 are bolted, and the bolts are made of 1Cr13 material; the diameter of the screw rod 7 is 5-20 mm; Preferably, a silicone seal 10 is provided at the smooth non-threaded portion passing through the blanking tube cavity 1, which can effectively solve the dust sealing problem and prevent dust from leaking when passing through the blanking tube cavity 1, thereby affecting the iron removal effect and the normal operation of the device; Preferably, the screw propeller 8 is in the shape of a bevel gear, made of S304 material, and is fixed to the mounting bracket 11 with bolts, so as to convert the rotational force of the servo motor 9 into the push-pull force of the screw 7, thereby achieving the purpose of adjusting the gap of the strong magnetic rod 4.

[0020] like Figure 3 As shown, the two ends of the magnetic bar fixed frame 5 are provided with a slide groove 14, and the two ends of the strong magnetic bar 4 are installed in the slide groove 14; in order to ensure the upper and lower limits of the strong magnetic bar 4 in the slide groove 14 and the smooth movement of the horizontal direction, the diameter of the slide groove 14 and the strong magnetic bar 4 is designed to have a tolerance of +1-10 mm; A plurality of strong magnetic rods 4 are fixed in parallel inside the magnetic rod fixing frame 5, which can more effectively attract magnetic impurities such as iron filings in the raw materials, thereby improving the iron removal efficiency; at the same time, by being arranged in parallel, each strong magnetic rod 4 can give full play to its magnetic attraction, avoiding the overlap of magnetic fields or the appearance of blank areas, thereby maximizing the use of magnetic energy for iron removal; Preferably, a strong magnetic rod 4 farthest from the screw rod 7 is fixed inside the magnetic rod fixing frame 5 by bolt fixing, which can limit the strong magnetic rod 4 and prevent the strong magnetic rod 4 from moving irregularly, which is beneficial to maintaining the stability of the magnetic field and improving the iron removal effect; Preferably, the length of the thread is designed according to the amount of movement adjusted by the strong magnetic bar 4 .

[0021] The present invention provides a method for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass. The above-mentioned automatic adjustment device for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass comprises the following steps: (1) Install an automatic adjustment device for the raw material iron removal magnetic grid in the kiln feeding system and perform initial process settings through the kiln control system: Set the delay time of working material level detector 2 without material; the delay time of upper limit material level detector 3 with material; the delay time after the gap between strong magnetic rod 4 is increased; the size of each movement after the gap between strong magnetic rod 4 is increased; the delay time after the gap between strong magnetic rod 4 is decreased; the size of each movement after the gap between strong magnetic rod 4 is decreased; (2) After the kiln control system completes the initial process setting, the device starts to operate according to the set process, and the magnetic selection state of the magnetic grid is determined by the working material level detector 2 and the upper limit material level detector 3: If the material level blade of the working material level detector 2 detects that there is raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials. The iron removal process is specifically as follows: the servo motor 9 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the screw propeller 8 to rotate, the screw propeller 8 pushes the screw 7 to push and pull the hinge mechanism 6, and the hinge mechanism 6 drives the magnetic grid to move horizontally; when the iron-containing material passes through, it is attracted by the strong magnetic rod 4 in the magnetic grid, and the iron-containing material is adsorbed on the tube wall of the strong magnetic rod 4; If the material level blade of the working material level detector 2 does not detect any raw material retention, execute (3); If the material level blade of the upper limit material level detector 3 detects that there is raw material retention, execute (4); If the material level blade of the upper limit material level detector 3 does not detect any raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; (3) Feedback the material-free signal to the control system. When the material-free time reaches the set delay time, the control system issues an instruction to reduce the gap between the strong magnetic rods 4 to avoid the large gap between the strong magnetic rods 4, so that some raw materials do not pass through the strong magnetic rods 4, resulting in poor removal effect of iron foreign matter on the magnetic grid, affecting the safe operation of the platinum channel; After receiving the instruction from the control system to reduce the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and push the hinge mechanism 6 to contract, thereby reducing the gap between the strong magnetic rods 4, and adjusting the magnetic grid gap according to the set movement size of the strong magnetic rods 4 each time; after completing the adjustment of the gap reduction once, the control system delays the effect verification time; after the effect verification delay time is reached, the control system determines whether adjustment is still needed based on the detection result of the working material level detector 2; If no raw material is still detected, execute (3) again; If it is detected that there is raw material retention, the control system stops adjusting and maintains the current state to remove iron from the raw materials; (4) Feedback the material presence signal to the control system. When the material presence time reaches the set delay time, the control system issues an instruction to increase the gap between the strong magnetic rods 4 to avoid the gap between the strong magnetic rods 4 being too small, resulting in poor flow of raw materials, accumulation and blockage of raw materials on the magnetic grid, resulting in raw material breakage, affecting the normal order of production; after receiving the instruction from the control system to increase the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and pull the hinge mechanism 6 to stretch, thereby increasing the gap between the strong magnetic rods 4, and completing the adjustment of the magnetic grid gap according to the set size of each movement of the strong magnetic rods 4; after completing the gap increase adjustment once, the control system delays the effect verification time; after reaching the effect verification delay time, the control system determines whether adjustment is still needed based on the detection result of the upper limit material level detector 3; If it is still detected that there is raw material retention, execute (4) again; If no raw material is detected to be retained, the control system stops adjusting and maintains the current state to remove iron from the raw materials; Preferably, the specific process of the working material level detector 2 detecting whether there is raw material retention is: the working material level drive motor 202 drives the material level blade to rotate, when the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector 2 is defined as the presence of raw material in the working material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the working material level detector 2 is defined as the absence of raw material in the working material level detection area; Preferably, the specific process of the upper limit material level detector 3 detecting whether there is any raw material retention is: the upper limit material level drive motor 302 drives the material level blade to rotate, when the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector 3 is defined as the upper limit material level detection area having raw materials; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the upper limit material level detector 3 is defined as the upper limit material level detection area having no raw materials.

[0022] Embodiment 3: (1) Install an automatic adjustment device for the raw material iron removal magnetic grid in the kiln feeding system and perform initial process settings through the kiln control system: Set the material-free delay (observation) time of working material level detector 2 to 10S; The upper limit material level detector 3 material delay time is 5S; After the gap between the strong magnetic rods 4 is increased and adjusted, the delay time is 10S; The gap between the strong magnetic bars 4 is increased to 5 mm each time the movement size is increased; The delay time after the gap between the strong magnetic rod 4 is reduced and adjusted is 15S; The gap between the strong magnetic rods 4 is reduced to 3 mm each time the movement size; (2) After the kiln control system completes the initial process setting, the system starts to operate according to the set process, and determines the magnetic selection state of the magnetic grid through the working material level detector 2 and the upper limit material level detector 3: If the material level blade of the working material level detector 2 detects that there is raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw material; If the material level blade of the working material level detector 2 does not detect any raw material retention, execute (3); If the material level blade of the upper limit material level detector 3 detects that there is raw material retention, execute (4); If the material level blade of the upper limit material level detector 3 does not detect any raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; (3) Feedback the material-free signal to the control system. When the material-free time reaches the set 10S delay time, the control system issues an instruction to reduce the gap between the strong magnetic rods 4. After receiving the instruction from the control system to reduce the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and push the hinge mechanism 6 to contract, thereby reducing the gap between the strong magnetic rods 4. The magnetic grid gap is adjusted according to the set 3mm movement size of the strong magnetic rods 4 each time. After completing the gap reduction adjustment, the control system delays the effect verification time for 15S. After the effect verification delay time is reached, the control system determines whether adjustment is required based on the detection result of the working material level detector 2. If no raw material is still detected, execute (3) again; If it is detected that there is raw material retention, the control system stops adjusting and maintains the current state to remove iron from the raw materials; (4) Feedback the material presence signal to the control system. When the material presence time reaches the set 5S delay time, the control system issues an instruction to increase the gap between the strong magnetic rods 4. After receiving the instruction from the control system to increase the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and pull the hinge mechanism 6 to stretch, thereby increasing the gap between the strong magnetic rods 4. The magnetic grid gap is adjusted according to the set strong magnetic rod 4 moving size of 5 mm each time. After completing the gap increase adjustment once, the control system delays the effect verification time for 10S. After the effect verification delay time is reached, the control system determines whether adjustment is required based on the detection result of the upper limit material level detector 3. If it is still detected that there is raw material retention, execute (4) again; If no raw material is detected to be retained, the control system stops adjusting and maintains the current state to remove iron from the raw materials.

[0023] The structure and working principle of the present invention are further described below: The purpose of the present invention is to provide an automatic adjustment device for removing iron magnetic grids from raw materials of TFT liquid crystal glass. When using the device, firstly, the automatic adjustment device for removing iron magnetic grids from raw materials is installed in the kiln feeding system, and the initial process settings are performed through the kiln control system: the delay time of the working material level detector 2 without material, the delay time of the upper limit material level detector 3 with material, the delay time after the adjustment of the gap increase of the strong magnetic rod 4, the continuous distance of each increase of the gap of the strong magnetic rod 4, the delay time after the adjustment of the gap reduction of the strong magnetic rod 4, and the continuous distance of each reduction of the gap of the strong magnetic rod 4 are set; Secondly, after the kiln control system completes the above process settings, the device starts to run according to the set process, and the magnetic separation state of the magnetic grid is determined by the working material level detector 2 and the upper limit material level detector 3: the working material level drive motor 202 drives the material level blade to rotate, and when the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector 2 is defined as the presence of raw materials in the working material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the working material level detector 2 is defined as the absence of raw materials in the working material level detection area; the upper limit material level drive motor 302 drives the material level blade to rotate, and when the material level blade contacts the raw material, the raw material generates resistance to the material level blade, and the working material level detector 3 is defined as the presence of raw materials in the upper limit material level detection area; when the material level blade does not contact the raw material, the material level blade does not generate resistance, and the upper limit material level detector 3 is defined as the absence of raw materials in the upper limit material level detection area; for the working material level detector 2 detecting that there is raw material retention and the upper limit material level detector 3 detecting that there is no raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; The specific principle of iron removal is: the servo motor 9 drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the screw propeller 8 to rotate, the screw propeller 8 pushes the screw 7 to push and pull the hinge mechanism 6, and the hinge mechanism 6 drives the magnetic grid to move horizontally; when the iron-containing material passes through, it is attracted by the strong magnetic rod 4 in the magnetic grid, and the iron-containing material is adsorbed on the tube wall of the strong magnetic rod 4; when the raw material passes through the upper magnetic grid, it flushes the strong magnetic rod 4, and the strong magnetic rod 4 divides the raw material into two powders and falls to the lower magnetic grid, and the strong magnetic rod 4 of the lower magnetic grid divides the raw material again; the more layers of magnetic grids are installed, the more times the raw material is divided, and the stronger the iron removal ability is.

[0024] If the working material level detector 2 cannot detect any raw materials remaining, a material-free signal will be fed back to the control system. When the material-free time reaches the delay time set by the kiln control system, the control system issues an instruction to reduce the gap between the strong magnetic rods 4. After receiving the instruction from the control system to reduce the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and push the hinge mechanism 6 to contract, thereby reducing the gap between the strong magnetic rods 4. The magnetic grid gap is adjusted according to the size of each movement of the strong magnetic rods 4 set by the control system. After completing a gap reduction adjustment, the control system delays the effect verification time. After the effect verification delay time is reached, the control system determines whether adjustment is still needed based on the detection result of the working material level detector 2. If the upper limit material level detector 3 cannot detect any raw materials remaining, the material presence signal will be fed back to the control system. When the material presence time reaches the set delay time, the control system will issue an instruction to increase the gap between the strong magnetic rods 4; after receiving the instruction from the control system to increase the gap between the strong magnetic rods 4, the servo motor 9 drives the screw propeller 8 to rotate and pull the hinge mechanism 6 to stretch, thereby increasing the gap between the strong magnetic rods 4, and completing the adjustment of the magnetic grid gap according to the set movement size of the strong magnetic rods 4 each time; after completing one gap increase adjustment, the control system delays the effect verification time; after the effect verification delay time is reached, the control system determines whether further adjustment is required based on the detection result of the upper limit material level detector 3.

[0025] The following further explains the structures involved in the above-mentioned device and method: Blanking pipe cavity 1: It is made of 1Cr13 material and has a square shape. The blanking pipe cavity 1 serves as a support for installing the working material level detector 2, the upper limit material level detector 3 and the magnetic grid mechanism to improve the iron removal capacity. A multi-layer magnetic grid mechanism is installed in the blanking pipe. The upper and lower magnetic grids are staggered with strong magnetic rods 4. When the raw materials pass through the upper magnetic grid, they flush the strong magnetic rods 4. The strong magnetic rods 4 divide the raw materials into two powders and fall to the lower magnetic grid. The strong magnetic rods 4 of the lower magnetic grid divide the raw materials again. The more layers of magnetic grids installed, the more times the raw materials are divided, and the stronger the iron removal capacity.

[0026] Control system: The control system of this device is composed of a working material level detector 2 and an upper limit material level detector 3 as the detection of the material discharge status of the magnetic grid, and the material level detection signal is uploaded to the raw material batching system or the kiln control system.

[0027] Working material level detector 2: During the process of raw materials washing the magnetic grid, the strong magnetic rod 4 in the magnetic grid will separate the raw materials and magnetically select iron foreign matter. Under the condition of a certain amount of raw material discharge, the gap between the two strong magnetic rods 4 installed on the magnetic grid will cause a small amount of raw materials to be retained on the upper part of the uppermost magnetic grid, so that the raw materials can be optimally magnetically separated and the iron foreign matter in the raw materials can be effectively eliminated. During the rotation of the material level blade, the raw materials retained on the upper part of the magnetic grid will produce running resistance. The working material level detector 2 will be defined as the presence of raw materials on the upper part of the magnetic grid, that is, the gap between the strong magnetic grid in the magnetic grid is normal, and the magnetic grid can remove iron. The force is optimal; when the amount of raw materials discharged becomes smaller, and the gap between the strong magnetic rods 4 of the top magnetic grid remains unchanged, the raw materials retained on the upper part of the magnetic grid will be reduced or even eliminated due to the reduction in the amount of raw materials discharged. When the resistance of the raw materials cannot be detected during the rotation of the level meter blade, the working level detector 2 will be defined as having no raw materials on the upper part of the magnetic grid. At this time, the gap between the two strong magnetic rods 4 installed on the magnetic grid is too large, and cannot meet the material separation and iron removal capacity of the magnetic grid after the amount of raw materials discharged is reduced, resulting in a deterioration in the iron removal effect of the magnetic grid. It is necessary to adjust and reduce the gap between the strong magnetic rods 4 to improve the iron removal capacity of the magnetic grid.

[0028] Upper limit material level detector 3: It is installed above the working material level detector 2. When the material level blade of the upper limit material level detector 3 cannot detect the resistance of the raw materials during rotation, the upper limit material level detector 3 is defined as no raw materials and the system operates normally. When the raw material resistance is detected during the rotation of the blade, the upper limit material level detector 3 is defined as raw material accumulation, that is, during the process of raw materials washing the magnetic grid, due to the small gap between the strong magnetic bars 4 or the large amount of raw materials unloading, the raw materials are accumulated on the uppermost magnetic grid and the height has reached the upper limit material level meter blade rotation area. It is necessary to increase the gap between the magnetic grid bars 4 to ensure the best magnetic grid iron removal capacity and magnetic grid material output to meet normal production and avoid blockage caused by poor material unloading on the upper part of the magnetic grid, resulting in the risk of material breakage.

[0029] Actuator: The actuator of the device is composed of a strong magnetic bar 4, a magnetic bar fixing frame 5, a hinge mechanism 6, a screw 7, a screw propeller 8, a servo motor 9, etc., so as to adjust the distance between the strong magnetic bars 4.

[0030] Strong magnetic rod 4: The strong magnetic rod 4 can be combined on the magnetic rod fixed frame 5 to form a magnetic filter; when iron-containing substances pass through, they are attracted by the strong magnetic rod 4 and firmly adsorbed on the tube wall of the strong magnetic rod 4, thereby achieving the effect of removing iron foreign matter in the raw materials; the length and number of the strong magnetic rod 4 need to be larger than the raw material feeding area to provide sufficient iron removal area and meet the maximum contact area between the strong magnetic rod 4 and the raw materials, thereby obtaining the best iron removal effect.

[0031] Magnetic bar fixing frame 5: The specific size of the magnetic bar fixing frame 5 plate is determined according to the size of the installation part and the selection of the strong magnetic rod 4, and it is processed into a square frame. The magnetic bar fixing frame 5 is installed with sliding grooves 14 at both ends in the length direction of the strong magnetic rod 4, which are used to fix the gap adjustment between the strong magnetic rods 4. The strong magnetic rod 4 at the farthest end of the screw rod 7 is fixed to the magnetic bar fixing frame 5 by bolt fixing, in order to limit the strong magnetic rod 4 and prevent the strong magnetic rod 4 from moving irregularly.

[0032] Hinge mechanism 6: used to adjust the gap between the strong magnetic rods 4. The hinge mechanism 6 is fixed to the magnetic rod fixing frame 5 together with the first strong magnetic rod 4 by the farthest end of the screw rod 7. The intersection between the hinge mechanism 6 and the strong magnetic rod 4 is bolted. The bolts are made of 1Cr13 material. The two ends of the strong magnetic rod 4 are installed in the slide groove 14 to limit the strong magnetic rod 4. The magnetic grid is driven by the hinge mechanism 6 to move horizontally. In order to ensure the upper and lower limits of the strong magnetic rod 4 in the slide groove 14 and the smooth movement of the horizontal direction, the slide groove 14 and the diameter of the strong magnetic rod 4 are designed with a tolerance of +1-10 mm.

[0033] Screw 7: The thread length of screw 7 is designed according to the adjustment of the movement amount of strong magnetic bar 4.

[0034] Screw propeller 8: It is fixed on the mounting bracket 11 with bolts, and converts the rotation force of the servo motor 9 into the push-pull force of the screw rod 7, so that the screw rod 7 moves back and forth, so as to achieve the purpose of adjusting the gap of the strong magnetic rod 4.

[0035] Servo motor 9: In order to meet the precision requirement of the movement of the strong magnetic rod 4, a servo motor 9 is selected to drive the screw propeller 8 to do work, and adjust the gap between the strong magnetic rod 4 with the screw 7 and the hinge mechanism 6.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic adjustment device for removing ferromagnetic grids from raw materials of TFT liquid crystal glass, characterized in that: It comprises a blanking tube cavity (1), an actuator and a control system; The actuator comprises a magnetic grid mechanism installed inside the blanking tube cavity (1), the magnetic grid mechanism comprises a plurality of layers of magnetic grids, a magnetic bar fixed frame (5) is installed inside each layer of magnetic grids, a gap exists between the magnetic grids and the magnetic bar fixed frame (5), a plurality of strong magnetic bars (4) are installed inside the magnetic bar fixed frame (5), and the strong magnetic bars (4) between two adjacent layers of magnetic grids are installed in an up-and-down staggered manner; two ends of the magnetic bar fixed frame (5) are provided with slide grooves (14), and two ends of the strong magnetic bars (4) are installed in the slide grooves (14); a hinge mechanism (6) is fixed outside the magnetic bar fixed frame (5), a screw (7) is installed at one end of the hinge mechanism (6), the screw (7) passes through the blanking tube cavity (1) and is connected to a screw propeller (8), and the screw propeller (8) is controlled by a servo motor (9); a fixing block (15) is installed between the strong magnetic bar (4) farthest from the screw (7) and the magnetic bar fixed frame (5); The control system comprises a working material level detector (2), the working material level detector (2) being mounted above the uppermost magnetic grid, and an upper limit material level detector (3) being mounted above the working material level detector (2).

2. The automatic adjustment device for removing ferromagnetic grid from raw materials of TFT liquid crystal glass according to claim 1, characterized in that: The screw rod (7) comprises a smooth non-threaded portion connected to the hinge mechanism (6) and a threaded portion connected to the screw propeller (8), and a silicone seal (10) is provided at the smooth non-threaded portion that passes through the blanking tube cavity (1).

3. The automatic adjustment device for removing iron and magnetic grid of raw materials of TFT liquid crystal glass according to claim 1, characterized in that: The screw propeller (8) is mounted on a rotating shaft (12), and the rotating shaft (12) is connected to a servo motor (9) via a coupling (13).

4. The automatic adjustment device for removing ferromagnetic grid from raw materials of TFT liquid crystal glass according to claim 1, characterized in that: The working material level detector (2) comprises a working detection probe (201), which is installed inside the material drop tube cavity (1), and the working detection probe (201) penetrates the barrel wall of the material drop tube cavity (1) and is connected to the working material level drive motor (202); the upper limit material level detector (3) comprises an upper limit detection probe (301), which is installed inside the material drop tube cavity (1), and the upper limit detection probe (301) penetrates the barrel wall of the material drop tube cavity (1) and is connected to the upper limit material level drive motor (302).

5. The automatic adjustment device for removing ferromagnetic grid from raw materials of TFT liquid crystal glass according to claim 4, characterized in that: Material level blades are installed on the working detection probe (201) and the upper limit detection probe (301).

6. The automatic adjustment device for removing ferromagnetic grid from raw materials of TFT liquid crystal glass according to claim 1, characterized in that: A support frame plate (11) is installed on the outer wall of the blanking tube cavity (1), and the screw propeller (8) is installed on the support frame plate (11).

7. A method for automatically adjusting ferromagnetic grids of raw materials for TFT liquid crystal glass, based on the automatic adjustment device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1, install the automatic adjustment device for raw material iron removal magnetic grid in the kiln feeding system, and make initial process settings through the kiln control system: Setting the delay time of the working material level detector (2) when there is no material; the delay time of the upper limit material level detector (3) when there is material; the delay time after the strong magnetic rod (4) increases the gap and adjusts it; the size of each movement of the strong magnetic rod (4) when the gap increases; the delay time after the strong magnetic rod (4) decreases the gap and adjusts it; the size of each movement of the strong magnetic rod (4) when the gap decreases; S2, after the kiln control system completes the initial process setting, the device starts to operate according to the set process, and determines the magnetic selection state of the magnetic grid through the working material level detector (2) and the upper limit material level detector (3): If the working material level detector (2) detects that there is raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw material; If the working material level detector (2) does not detect any raw material retention, execute S3; If the upper limit material level detector (3) detects that there is raw material retention, execute S4; If the upper limit material level detector (3) does not detect any raw material retention, it is determined that the magnetic separation effect of the magnetic grid is good, and the current state is maintained to remove iron from the raw materials; S3, feeding back the material-free signal to the control system, and when the material-free time reaches the set delay time, the control system issues an instruction to reduce the gap between the strong magnetic rods (4); after receiving the instruction from the control system to reduce the gap between the strong magnetic rods (4), the servo motor (9) drives the screw propeller (8) to rotate and push the hinge mechanism (6) to contract, thereby reducing the gap between the strong magnetic rods (4), and completing the adjustment of the magnetic grid gap according to the set movement size of the strong magnetic rods (4) each time; after completing the adjustment of the gap reduction once, the control system delays the effect verification time; after reaching the effect verification delay time, the control system determines whether adjustment is still needed based on the detection result of the working material level detector (2); If no raw material retention is detected, execute S3 again; If it is detected that there is raw material retention, the control system stops adjusting and maintains the current state to remove iron from the raw materials; S4, feeding back the material presence signal to the control system, when the material presence time reaches the set delay time, the control system issues an instruction to increase the gap between the strong magnetic rods (4); after receiving the instruction from the control system to increase the gap between the strong magnetic rods (4), the servo motor (9) drives the screw propeller (8) to rotate and pull the hinge mechanism (6) to stretch, thereby increasing the gap between the strong magnetic rods (4), and completing the adjustment of the magnetic grid gap according to the set movement size of the strong magnetic rods (4) each time; after completing the gap increase adjustment once, the control system delays the effect verification time; after reaching the effect verification delay time, the control system determines whether adjustment is still needed based on the detection result of the upper limit material level detector (3); If it is still detected that there is raw material retention, S4 is executed again; If no raw material is detected to be retained, the control system stops adjusting and maintains the current state to remove iron from the raw materials.

8. The method for automatically adjusting the ferromagnetic grid of TFT liquid crystal glass raw materials according to claim 7, characterized in that: The iron removal process specifically comprises: a servo motor (9) drives a rotating shaft (12) to rotate, the rotating shaft (12) drives a screw propeller (8) to rotate, the screw propeller (8) pushes a screw rod (7) to push and pull a hinge mechanism (6), and the hinge mechanism (6) drives a magnetic grid to move horizontally; when iron-containing substances pass through, they are attracted by a strong magnetic rod (4) in the magnetic grid, and the iron-containing substances are adsorbed on the tube wall of the strong magnetic rod (4).

9. The method for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass according to claim 7, characterized in that: The working material level detector (2) is provided with a material level blade. The working material level detector (2) detects whether there is any raw material retention in the following manner: the working material level drive motor (202) drives the material level blade to rotate. When the material level blade contacts the raw material, the raw material generates resistance to the material level blade. The working material level detector (2) is defined as the presence of raw material in the working material level detection area. When the material level blade does not contact the raw material, the material level blade does not generate resistance. The working material level detector (2) is defined as the absence of raw material in the working material level detection area.

10. The method for automatically adjusting the ferromagnetic grid of a raw material of a TFT liquid crystal glass according to claim 7, characterized in that: The upper limit material level detector (3) is provided with a material level blade. The upper limit material level detector (3) detects whether there is any raw material retention in the following manner: the upper limit material level drive motor (302) drives the material level blade to rotate. When the material level blade contacts the raw material, the raw material generates resistance to the material level blade. The working material level detector (3) is defined as the presence of raw material in the upper limit material level detection area. When the material level blade does not contact the raw material, the material level blade does not generate resistance. The upper limit material level detector (3) is defined as the absence of raw material in the upper limit material level detection area.

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