A fully automatic iron removal device for glass raw materials

Abstract

This application relates to a fully automatic iron remover for glass raw materials. The iron remover is installed between the glass raw material discharge system and the conveyor belt. The iron remover includes a fixed frame, a movable frame, and an iron-absorbing device. The fixed frame is fixed at the input end of the conveyor belt and located below the discharge system. The movable frame is mounted on the fixed frame and has translational freedom relative to the fixed frame along its length. The iron-absorbing device is fixed on the movable frame and faces the discharge port of the discharge system, used to absorb iron products in the raw materials during the discharge process. The iron-absorbing device and a driving device are arranged opposite each other on both sides of the fixed frame. The driving device is used to drive the iron-absorbing device to move along the length of the movable frame to a first position and a second position. The iron-absorbing device is located at the second position and cooperates with the iron-absorbing device to remove the iron products absorbed by the iron-absorbing device.

Description

Technical Field

[0001] This application relates to the technical field of glass raw material production, and in particular to a fully automatic glass raw material iron removal device. Background Technology

[0002] As a substrate material for solar photovoltaic modules, ultra-clear glass requires an iron content of ≤150ppm to meet the light transmittance requirements. Therefore, many companies require the iron content in the raw materials of the glass to be ≤120ppm. However, due to the processes of transportation, external contact, feeding, mixing, and manual cutting, a large amount of iron contamination occurs due to contact with iron objects, and the iron content cannot be controlled. Once it is slightly out of control, the target of ≤150ppm iron content in the glass raw materials cannot be achieved, resulting in low light transmittance and failure to meet the standards, leading to returns and huge losses.

[0003] To minimize secondary iron contamination in photovoltaic glass raw materials, ensure the required iron content, and improve light transmittance, various photovoltaic glass manufacturers employ different methods. For example, they install iron separators and metal detectors at belt conveyors, discharge chutes, bottom outlets of silos, and related locations to remove mechanical iron impurities. Alternatively, during the conveyor belt transport of crushed glass after discharge, a powerful magnet is installed at a height of 200-300 mm above the crushed glass. This magnet is cleaned daily. The iron separator typically uses the powerful magnet to adsorb iron filings, which are then manually removed from the separator.

[0004] In existing iron removal methods, the magnets are installed on the raw material conveyor belt, but iron filings in the middle and lower parts of the material layer cannot be completely removed. The raw material does not have sufficient contact with the magnets, resulting in poor iron removal efficiency. Furthermore, the iron filings adsorbed on the iron separator require manual removal, which is time-consuming and labor-intensive. Summary of the Invention

[0005] To improve the iron removal efficiency of raw materials and automatically clean the iron filings adsorbed on the iron separator, thus saving a significant amount of labor, this application provides a fully automatic iron separator for glass raw materials. The technical solution is as follows:

[0006] A fully automatic iron removal device for glass raw materials, wherein the iron removal device is installed between the discharge system of glass raw materials and the conveyor belt, and the iron removal device includes a fixed frame, a movable frame and an iron suction device.

[0007] The fixed frame is fixed at the input end of the conveyor belt and located below the discharge system; the movable frame is mounted on the fixed frame and has translational freedom relative to the fixed frame along its length.

[0008] The magnet is fixed on the movable frame and is positioned facing the discharge port of the discharge system, and is used to adsorb iron products in the raw materials during the discharge process.

[0009] The fixed frame is provided with an iron removal device and a driving device on both sides. The driving device is used to drive the iron removal device to move along the length direction of the moving frame and has a first position and a second position.

[0010] The magnet is located at the second position and works in conjunction with the iron removal device to remove iron products adsorbed on the magnet.

[0011] Optionally, the magnet-attracting device includes a fixing plate for fixing to the movable frame and several strong magnets; the magnets are arranged in an array on the fixing plate, and the magnets are disposed on the side of the fixing plate facing the discharge port of the discharge system.

[0012] Optionally, the fixing plate is covered with a canvas on the side where the magnet is located;

[0013] One side of the canvas extends toward the iron removal device and covers the iron removal device, and then continues to extend to be fixed to the end face of the movable frame.

[0014] Optionally, a plurality of iron pads are provided on the side of the canvas facing the magnet, each iron pad corresponding to a magnet, for adsorbing and fixing the canvas.

[0015] Optionally, the iron removal device includes a damping plate, the two sides of which are fixed to a fixed frame, and the damping plate is arranged parallel to the end face of the magnet.

[0016] There is a certain gap between the damping plate and the magnet. When the magnet is located at the second position, the damping plate isolates the iron pad from the magnet so as to remove the iron products adsorbed on it.

[0017] Optionally, the gap between the damping plate and the magnet is set to 3mm-7mm;

[0018] The damping plate is provided with a nut washer at its fixed end for adjusting the gap.

[0019] Optionally, the movable frame includes an upper frame and a lower frame, both of which are rectangular frames;

[0020] The upper and lower frames are spaced apart and staggered vertically on the fixed frame, so that the magnet is tilted at a certain angle.

[0021] Optionally, the fixed frame has a clearance structure on the side where the iron removal device is located to allow the movement of the iron-absorbing device.

[0022] Optionally, the iron remover may further include a recycling device located below the iron remover for recycling the removed iron products.

[0023] Optionally, the iron remover includes a control system, which is connected to control the conveyor belt and the drive device;

[0024] The control system includes a contactor auxiliary contact and an inductive switch. The contactor auxiliary contact is used to control the selective start of either the conveyor belt or the drive device.

[0025] The inductive switch is used to control the drive device to shut down.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. This application provides a fully automatic iron separator installed before the conveyor belt after the glass raw materials pass through the discharge system. It can automatically clean the iron filings adsorbed on the iron separator, saving a lot of labor. Moreover, because the iron separator is in close contact with the raw materials, the iron separator has strong adsorption force and the effect is very good.

[0028] 2. This application provides a fully automatic iron removal device for glass raw materials, which solves the problem that existing iron removal devices are suspended above the raw materials, do not have sufficient contact with the raw materials, cannot adsorb most of the iron materials in the lower part of the material layer, and cannot clean the iron filings mixed into the raw materials. Attached Figure Description

[0029] Figure 1 This is a front view of the iron separator in this embodiment;

[0030] Figure 2 This is a top view of the iron separator in this embodiment;

[0031] Figure 3 This is a side view of the iron separator in this embodiment;

[0032] Figure 4 This is a detailed view of the lower frame of the iron separator in this embodiment;

[0033] Figure 5 This is the electrical circuit control diagram of the iron separator in this embodiment.

[0034] Explanation of reference numerals in the attached drawings: 1. Fixed frame; 2. Moving frame; 21. Upper frame; 22. Lower frame; 3. Magnetizing device; 31. Fixing plate; 32. Magnet; 33. Canvas; 4. Iron removal device; 41. Damping plate; 42. Nut washer; 5. Drive device; 6. Recycling device; 7. Proximity switch. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 -5 provides further details regarding this application.

[0036] This application discloses a fully automatic iron removal device for glass raw materials. The iron removal device adopts a fully automatic mode, is easy to operate, and saves time and labor. The iron removal device is installed before the glass raw materials enter the conveyor belt after passing through the discharge system. It can come into close contact with the raw materials to achieve full contact with the raw materials, adsorb most of the iron materials in the lower part of the material layer, and clean the iron filings mixed into the interior of the raw materials.

[0037] The iron remover provided in this application includes a fixed frame 1, a movable frame 2, and an iron suction device 3. For example, the original melting belt width is 800 mm, the upper width of the chute is 800 mm, the lower width is 600 mm, and the width of the vibrating discharge machine is 500 mm.

[0038] After various raw materials for glass are weighed by the electronic scale system, they are discharged onto the belt conveyor through the discharge system and transported to the mixer. During this process, a fixed frame 1 is installed below the discharge system. The fixed frame 1 is fixed at the input port of the belt conveyor. Baffles are provided around the fixed frame 1 to prevent the material discharged by the discharge machine from scattering and to prevent dust. The thickness of the baffles of the fixed frame 1 is 5 mm.

[0039] DN42 circular holes are made on the baffles on both sides of the fixed frame 1. The holes on both sides are consistent in length and height and are used to install the movable frame 2. The movable frame 2 includes an upper frame 21 and a lower frame 22. Both the upper frame 21 and the lower frame 22 are rectangular frames formed by welding stainless steel pipes with a length of 2000mm and 40mm respectively. A sleeve with a length of 20mm is welded into the circular hole of the fixed frame 1. The long side of the upper frame 21 and the lower frame 22 is slidably fitted into the sleeve, so that the upper frame 21 and the lower frame 22 have translational freedom relative to the fixed frame 1 along their length direction. Burrs are removed from the inner hole and the outer side of the sleeve to ensure that the upper frame 21 and the lower frame 22 can be pulled out smoothly.

[0040] The upper frame 21 and the lower frame 22 are spaced apart and staggered vertically on the fixed frame 1. The upper frame 21 is located 150 mm away from the outlet of the discharge machine and is 180 mm higher than the upper edge of the discharge system. The lower frame 22 is located 200 mm lower than the outlet of the discharge system.

[0041] Based on the distance between the upper frame 21 and the lower frame 22, a fixing plate 31 with a thickness of 3mm and a length of 500mm-600mm is set. It is welded and fixed to the upper frame 21 and the lower frame 22 on both sides along the long side. A 70*50*20 strong magnet 32 ​​is set on the fixing plate 31. Starting from the bottom of the iron plate, the adsorption height is 6 pieces of 70mm, and the horizontal area is 10 pieces, with an area of ​​420mm*500mm. Several magnets 32 are arranged in an array on the fixing plate 31 to form an iron-attracting device 3.

[0042] The side of the fixing plate 31 with the magnet 32 ​​is set facing the discharge port of the discharge system. It is used to adsorb iron products in the raw materials during the discharge process. Due to the staggered arrangement of the upper frame 21 and the lower frame 22, the fixing plate 31 is tilted at a certain angle, which increases the area of ​​close contact with the raw materials and ensures full contact with the raw materials.

[0043] Iron removal device 4 and driving device 5 are arranged opposite to each other on both sides of the fixed frame 1. The driving device 5 is used to drive the iron removal device 3 to move along the length direction of the moving frame 2 to have a first position and a second position. The iron removal device 3 performs adsorption work in the first position and unloads material in the second position. The driving device 5 adopts a cylinder with a stroke of 800 mm. The fixed plate 31 of the iron removal device 3 is locked and fixed to the push rod end of the cylinder. The cylinder can push the iron removal device 3 to move through the push rod, thereby driving the moving frame 2 to move, realizing the replacement of the first position and the second position of the iron removal device 3.

[0044] The magnet 3 is located at the second position and cooperates with the iron removal device 4 to remove the iron products adsorbed on the magnet 3. The iron removal device 4 includes a damping plate 41. The two sides of the damping plate 41 are fixed on the fixed frame 1. The damping plate 41 is set to be 200 mm wide and 20 mm thick. The damping plate 41 is parallel to the end face of the magnet 32 ​​and there is a certain horizontal gap between them. The gap is set to be 3 mm to 7 mm.

[0045] The damping plate 41 is mounted on the iron plate of the fixed frame 1 by screws on both sides. The distance between the nylon plate and the side of the fixed frame 1 is 50 mm. A nut washer 42 is provided at the screw at the fixed end of the damping plate 41 to adjust the gap.

[0046] A canvas 33 is placed on the side of the fixed plate 31 where the magnet 32 ​​is located. One side of the canvas 33 extends towards the damping plate 41 and covers the damping plate 41, and then continues to extend to the end face of the movable frame 2 and is fixed thereon. Two 40 mm wide strips of canvas 33 are horizontally sewn along the length of the canvas 33, dividing the width into three equal parts. Ten iron shims with an outer diameter of 36 mm are placed at equal intervals inside each strip of canvas 33 and fixed with a sewing machine. The canvas strips and the canvas 33 are completely sewn together to seal the entire area.

[0047] Each iron pad corresponds to a magnet 32, which is used to attract and fix the canvas 33. The canvas 33 and the magnet 32 ​​are installed parallel to each other, with the bottom of the canvas 33 flush with the bottom of the magnet 32. The canvas 33 is kept in a loose state, with the canvas 33 strip and the iron pad inside. The iron pad is attracted and fixed on the magnet 32. When attracting iron products in the raw materials, the iron products are attracted to the canvas 33 and isolated from the magnet 32.

[0048] During the process of the magnet 3 moving from the first position to the second position, the canvas 33 is covered on the damping plate 41. The damping plate 41 is stationary, and the canvas 33 is displaced relative to the damping plate 41 due to the movement of the moving frame 2. When the magnet 32 ​​is in the second position, the damping plate 41 isolates the iron pad from the attraction of the magnet 32, and the canvas 33 is spread to block the attraction of the magnet to the iron product, and the iron product falls off automatically.

[0049] Preferably, a recycling device 6 is set below the iron removal device 4 to collect the fallen iron products. In order to ensure that all the iron products on the iron removal device 3 fall into the recycling device 6, an inlet rubber is placed at the inlet of the recycling device 6 and extends into the wooden barrel so that all the iron products can enter the recycling device 6.

[0050] To facilitate the movement of the magnet-absorbing device 3 from the first position to the second position, a clearance structure is provided on the side of the fixed frame 1 where the magnet-removing device 4 is located to allow the movement of the magnet-absorbing device 3.

[0051] To achieve a fully automatic iron separator for glass raw materials and facilitate operation, the iron separator includes a control system. The control system is connected to control the conveyor belt and drive unit 5. The control system includes auxiliary equipment such as control switches, relays, proximity switches 7, solenoid valves, and induction switches. The iron separator can be operated from the control room or on-site. An auxiliary contact of the conveyor belt contactor is added. The automatic cleaning operation cannot be started during the operation of the conveyor belt.

[0052] The contactor auxiliary contact provided is used to control the selective start of the conveyor belt and the drive device 5. The inductive switch is used to control the drive device 5 to shut down. A 220V normally closed proximity switch 7 is installed above the fixed frame 1 close to the right iron plate. It has a built-in inductive switch. When the iron remover is fully pushed out, the end face of the moving frame 2 will reach the bottom of the proximity switch 7, so that the inductive switch on the proximity switch 7 can sense it. The proximity switch 7 then controls the drive device 5 to shut down.

[0053] like Figure 5Pushbutton switches SB1 / SB2 are installed in the control room next to the iron remover. The cylinder air supply is controlled by the proximity switch 7SQ and the auxiliary contact of the belt motor contactor KM1. The proximity switch 7 and the belt conveyor contactor provide normally closed signals. Only when the belt conveyor stops running and the iron remover button is pressed can the cylinder solenoid valve be energized and opened. The iron suction device 3 and the iron removal device 4 work together to automatically clean the iron products adsorbed on the canvas 33.

[0054] Circuit diagram explanation: Pressing SB1 engages contactor KM1, the belt conveyor operates, contactor KM1 self-locks, and the auxiliary contact of KM1 controlling the magnetic separator solenoid valve opens, maintaining continuous operation of the belt conveyor. At this time, pressing buttons SB2 and SB3 will disconnect the solenoid valve and KA circuit, preventing them from being energized. Therefore, during belt conveyor operation, the automatic cleaning of iron filings on the magnet cannot be opened. Pressing the SD stop button stops the belt conveyor and closes the auxiliary contact of KM1 controlling the solenoid valve circuit. Pressing either SB2 or SB3 in the control room or on-site will energize the solenoid valve and KA because proximity switch 726 is normally closed, causing the cylinder to operate and the magnetic separator 3 to extend, automatically removing iron products adsorbed on the canvas 33.

[0055] Pressing either SB2 or SB3 energizes KA, which self-locks the circuit, keeping the solenoid valve continuously energized. This allows air to enter the cylinder, and the push rod slowly extends, continuously removing iron products adsorbed on the canvas 33. When the iron remover is fully extended to the second position, the automatic cleaning of iron filings is complete. The end face of the moving frame 2 will reach the underside of the proximity switch 7, triggering the inductive switch on the proximity switch 7. The proximity switch 7 changes from closed to open, the solenoid valve is de-energized, the cylinder loses air supply, the push rod retracts, and the iron-attracting device 3 is pulled back to its original position (the initial working position, i.e., the first position).

[0056] The iron separator provided in this application operates as follows:

[0057] 1. There is an iron pad on the inside of the canvas 33, which is attracted to the magnet 32, so that the canvas 33 is in close contact with the magnet, increasing the magnet's ability to attract iron filings in the raw material.

[0058] 2. During the material discharge process, iron filings, nails, nuts, etc., carried in the raw materials are attracted to the outside of the canvas 33 of the magnet 32.

[0059] 3. During the material discharge process, the belt conveyor contactor is energized and the belt conveyor runs. The auxiliary contact of the belt conveyor contactor in the circuit controlling the solenoid valve of the cylinder is disconnected, so the cleaning work cannot be started when the belt conveyor is running. Magnet 32 ​​is always in the first position.

[0060] 4. When the feeding process stops, the belt conveyor stops, the belt contactor provides a closed circuit, and the proximity switch 7 does not approach the end face of the moving frame 2, thus providing a closed circuit.

[0061] 5. When not discharging material, press the button in the control room or on site to energize the relay of the control cylinder, the self-locking button, and to supply power to the cylinder solenoid valve.

[0062] 6. When the cylinder solenoid valve is energized, the cylinder opens, the iron remover is slowly pushed out, and the nylon plate will gradually separate the iron pad on the inside of the canvas 33 from the magnet 32. The iron filings on the outside of the canvas 33 lose their attraction to the magnet 32, and the iron filings fall off automatically.

[0063] 7. A wooden barrel is placed under the nylon board as a recycling device 6, and all the iron filings fall into the barrel.

[0064] 8. When the cylinder opens to a certain extent, the entire iron separator is pushed out, and all the iron filings on the canvas 33 fall off. The proximity switch 7 senses the end face of the moving frame 2, and the normally closed contact of the proximity switch 7 opens. The cylinder solenoid valve is de-energized, the cylinder loses its air supply, and the iron separator slowly moves back and forth, returning to the working position, i.e., the first position.

[0065] 9. Remove iron filings from the wooden barrel regularly.

[0066] The iron separator provided in this application has a simple structure and is easy to operate. It only requires emptying the iron filings in the wooden bucket periodically. It is also simple to manufacture and has a low cost. The glass raw materials are fully in contact with the iron separator during the process of being discharged from the discharge system to the belt conveyor, resulting in good iron removal effect. The iron filings cleaning of the iron separator can be carried out between the two raw material feeding times without affecting production. It can be controlled by buttons in the control room or at the operation site, reducing labor costs.

[0067] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A fully automatic glass raw material iron eliminator apparatus, characterized by: The iron remover is installed between the discharging system of glass raw materials and the conveying belt machine, and comprises a fixed frame, a moving frame and an iron suction device; The fixed frame is fixed at the input end of the conveying belt machine and below the discharging system; the moving frame is installed on the fixed frame and has translational freedom relative to the fixed frame along the length direction of the fixed frame; The iron suction device is fixed on the moving frame and is arranged to face the discharging port of the discharging system for adsorbing iron products in the raw materials during discharging; Iron removal devices and driving devices are arranged on both sides of the fixed frame, and the driving devices are used to drive the iron suction device to move along the length direction of the moving frame and have a first position and a second position; The iron suction device cooperates with the iron removal devices at the second position to unload the iron products adsorbed on the iron suction device; The iron suction device comprises a fixed plate for being fixed on the moving frame and a plurality of strong magnets distributed on the fixed plate; a canvas is arranged on the side of the fixed plate provided with the magnets, and a plurality of iron pads are arranged on the side of the canvas facing the magnets for adsorbing and fixing the canvas; The iron removal devices comprise a damping plate, and both sides of the damping plate are fixed on the fixed frame, and the damping plate is arranged in parallel with the end face of the magnets; There is a gap between the damping plate and the magnets, and the magnets are isolated from the iron pads and the magnets by the damping plate at the second position to unload the iron products adsorbed on the magnets.

2. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The magnets are arrayed on the fixed plate, and the magnets are arranged on the side of the fixed plate facing the discharging port of the discharging system.

3. A fully automatic glass raw material iron remover apparatus according to claim 2, characterized in that: The side of the canvas extends towards the iron removal devices and covers the iron removal devices, and then continues to extend to be fixed to the end face of the moving frame.

4. A fully automatic glass raw material iron remover apparatus according to claim 3, characterized in that: Each iron pad corresponds to a magnet.

5. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The gap between the damping plate and the magnets is 3-7 mm; The fixed end of the damping plate is provided with a nut gasket for adjusting the gap.

6. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The moving frame comprises an upper frame and a lower frame, and the upper frame and the lower frame are rectangular frames; The upper frame and the lower frame are arranged in a staggered manner on the fixed frame with a certain interval, so that the iron suction device is inclined at a certain angle.

7. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The fixed frame is provided with a structure for allowing the movement of the iron suction device on the side provided with the iron removal devices.

8. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The iron remover further comprises a recovery device arranged below the iron removal devices for recovering the unloaded iron products.

9. A fully automatic glass raw material iron remover apparatus according to claim 1, characterized in that: The iron remover comprises a control system connected to control the conveying belt machine and the driving devices; The control system comprises an auxiliary contactor and an inductive switch, the auxiliary contactor is used to control the conveying belt machine and the driving devices to be started alternatively; and the inductive switch is used to control the driving devices to be closed. ​

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