Monocrystalline silicon lump material full-automatic screening, weighing and boxing production line

Abstract

The invention discloses a full-automatic single crystal silicon lump material screening, weighing and boxing production line, and belongs to the technical field of single crystal silicon lump material production.The full-automatic single crystal silicon lump material screening, weighing and boxing production line comprises a vibrating screen, a plurality of weighing hoppers, a plurality of material conveying belts and a plurality of packaging machines, each conveying belt is located below the corresponding weighing hopper, and each packaging machine is arranged on one side of the corresponding conveying belt. The weighing hopper comprises a top ring, a hopper body, two bottom covers and two supporting legs, and the two bottom covers are rotationally arranged at the bottom of the hopper body. According to the invention, the buffer disc for buffering the monocrystalline silicon lump material and the lifting conveying mechanism for carefully putting the monocrystalline silicon lump material into the weighing hopper are arranged below the discharge port of the vibrating screen, so that the impact between the monocrystalline silicon lump material and the inner wall of the machine in the whole screening, weighing and boxing process is reduced; therefore, the integrity of the monocrystalline silicon block material is ensured.

Description

Technical Field

[0001] This invention belongs to the field of monocrystalline silicon block production technology, specifically involving a fully automated screening, weighing, and packing production line for monocrystalline silicon blocks. Background Technology

[0002] Monocrystalline silicon blocks generally refer to monocrystalline silicon ingots obtained through crystal pulling or block-shaped silicon materials formed by cutting monocrystalline silicon rods. They are one of the basic raw materials for manufacturing high-end electronic devices or solar cells. Currently, the mainstream production method for monocrystalline silicon is the Czochralski method, which involves melting high-purity polycrystalline silicon raw materials in a quartz crucible, then immersing a seed crystal into the surface of the melt. By precisely controlling the temperature and pulling rotation speed, the melt is guided by the seed crystal to replicate and grow according to its crystal orientation, eventually being pulled into a huge monocrystalline silicon rod. In the quartz crucible, silicon blocks of different sizes melt at different rates. If silicon blocks of different sizes are mixed together and placed in the crucible, the smaller pieces and powders will melt first, while the larger pieces will melt slowly. This will lead to uneven temperature distribution in the crucible, generating severe thermal stress, and may even cause silicon liquid to splash, damaging the expensive quartz crucible and heater. Therefore, it is necessary to screen, weigh, and pack the silicon blocks beforehand.

[0003] Chinese patent CN116273273B discloses a crushing and screening device for monocrystalline silicon edge material, comprising: a substrate, at least one set of impact crushing devices, a screening machine, and a magnetic separator. The substrate has a discharge port. The head of each swing arm is fixedly connected to an alloy hammer. A transmission mechanism is fitted to the tail ends of the two swing arms and, through a drive component, drives the two swing arms to reciprocate and alternately swing around a pivot pin, impacting and crushing the monocrystalline silicon edge material to be crushed below the two alloy hammers. This crushing and screening device can simulate the high-speed, alternating impact of human hands on the edge material, effectively reducing the powder and surface metal content generated during crushing.

[0004] During the screening and weighing process, as well as the weighing and packing process, falling, flipping, piling up, and flowing are inevitable. This will cause collisions and friction between the monocrystalline silicon blocks, resulting in debris. These newly generated microparticles have a huge specific surface area and extremely high surface activity. They are like countless tiny sponges, which will immediately absorb the trace amounts of water vapor, oxygen, and hydrocarbons remaining in the cleanroom environment. In the subsequent high-temperature melting process, the adsorbed oxygen and carbon will become oxygen impurities and carbon impurities in the melt. These impurities will seriously affect the electrical properties of the monocrystalline silicon, cause crystal defects, and directly lead to a decrease in the performance of the final produced chip or scrap. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a fully automatic screening, weighing and packing production line for monocrystalline silicon blocks.

[0006] The technical solution adopted to solve the above technical problems is: The fully automatic screening, weighing and packing production line for monocrystalline silicon blocks includes a vibrating screen, several weighing hoppers, several conveyor belts and several packing machines. The vibrating screen has several discharge ports on its side wall. Each weighing hopper is aligned with one discharge port. Each conveyor belt is located below a weighing hopper. Each packing machine is equipped with one side of a conveyor belt. The weighing hopper includes a top ring, a hopper body, two bottom covers, and two support legs. The two support legs are fixedly installed at the bottom of the top ring, and the two bottom covers are rotatably installed at the bottom of the hopper body. A weighing module is provided between the hopper body and the support legs. Two support plates are fixedly installed at the top of the top ring, and a lifting and conveying mechanism is provided on the side wall of the two support plates. A buffer plate is installed in the lifting and conveying mechanism, and the buffer plate is facing the discharge port. The top ring sidewall is fixedly equipped with a feeding mechanism for supplying the buffer tray.

[0007] The above technical solution involves setting a buffer plate below the discharge port of the vibrating screen to buffer the monocrystalline silicon blocks, and a lifting and conveying mechanism to carefully place the monocrystalline silicon blocks into the weighing hopper. This reduces the impact between the monocrystalline silicon blocks and the inner wall of the machine during the entire screening, weighing and packing process, thereby ensuring the integrity of the monocrystalline silicon blocks.

[0008] Furthermore, the lifting and conveying mechanism includes a lifting ring, a guide rod, a reciprocating screw, a rotating bevel gear, two baffle plates, and two actuating rods. The guide rod and the reciprocating screw are rotatably connected to the side walls of the two support plates, respectively. Both the guide rod and the reciprocating screw extend into the hopper body. The rotating bevel gear is rotatably connected to the top of the reciprocating screw. The two side walls of the lifting ring are respectively provided with extension portions. The two side walls of the extension portions are respectively provided with guide holes and threaded holes. The guide rod passes through the guide holes, and the reciprocating screw is threadedly connected to the threaded holes. The side walls of the lifting ring are provided with several protruding teeth. The buffer plate abuts against the top of the protruding teeth. The two baffle plates are respectively fixedly installed at the bottom of the guide rod and the reciprocating screw. The two actuating rods are rotatably installed on the top of the baffle plate where the guide rod is located.

[0009] Through the above technical solution, the guide rod is set to guide the lifting ring, ensuring that the lifting ring can rise and fall stably in the hopper body. The protruding teeth facilitate the placement of the buffer plate on it, ensuring that the buffer plate can withstand the downward force when the monocrystalline silicon block falls from the outlet.

[0010] Furthermore, the distance between the baffle plate and the inner wall of the hopper body is greater than 20mm, and the distance between the guide rod and the reciprocating screw and the inner wall of the hopper body is greater than 50mm.

[0011] With the above technical solution, one of the baffle plates will rotate together with the reciprocating screw, thus ensuring the distance between the baffle plate and the hopper body. This can effectively prevent unnecessary collisions between the baffle plate and the inner wall of the hopper body, which can not only avoid damage to the inner wall of the hopper body, but also avoid misjudgment by the weighing module, thereby ensuring the accuracy of the weighing results.

[0012] Furthermore, the bottom of the lifting ring has an annular groove, in which two arc-shaped rods are slidably connected. One end of the two arc-shaped rods abuts against each other, and the other end is fixedly provided with an arc-shaped spring. A bottom shell is fixedly provided at the bottom of the lifting ring. The arc-shaped rods pass through the inside of the bottom shell. Several placement grooves are provided on the side wall of the arc-shaped rods. A side torsion spring is provided in each placement groove. The protruding teeth are provided on the outside of the side torsion springs. Several through holes are provided on the side wall of the bottom shell. Several protruding teeth extend from several through holes. The end of the protruding teeth facing the arc-shaped spring is arc-shaped.

[0013] With the above technical solution, when the lifting ring is driven down to the bottom by the reciprocating screw, the actuating rod can push the two arc-shaped rods apart, thereby compressing the arc-shaped spring. As the arc-shaped rods move, the protruding teeth will retract into the through hole and be stored in the placement slot, without affecting the further movement of the arc-shaped rods. The side torsion spring will ensure that the protruding teeth always remain in the state of pressing against the side wall of the bottom shell.

[0014] Furthermore, the two arc-shaped rods abut against each other at one end with an arc design, and the two actuating rods are both located below the abutting positions of the two arc-shaped rods. The two actuating rods abut against each other on one side, and the two actuating rods are arc-shaped at the ends away from each other. A bottom torsion spring is provided inside the actuating rod.

[0015] Through the above technical solution, the arc-shaped rod and the actuating rod with the arc design allow the actuating rod to push the arc-shaped rod open smoothly when the lifting ring descends, thereby causing the protruding teeth to retract into the through hole. Furthermore, the setting of the bottom torsion spring will also ensure that after the lifting ring leaves, the two actuating rods return to a state of mutual dependence.

[0016] Furthermore, the buffer disk includes a side ring, an inner ring, and a buffer mesh. The inner ring is fixedly disposed inside the side ring, and the buffer mesh is disposed inside the inner ring. The thickness of the side ring is greater than the thickness of the inner ring, and the side ring abuts against the top of the protruding tooth.

[0017] Through the above technical solution, the buffer net set in the middle position can catch the falling monocrystalline silicon block. The material of the buffer net can be set as a mesh cloth to ensure the buffering effect on the block. In addition, the side ring is thicker, which can also prevent the block on the buffer net from directly colliding with the bottom cover or conveyor belt when the buffer plate falls.

[0018] Furthermore, the diameter of the side ring is smaller than the diameter of the lifting ring, and the side ring is made of rubber.

[0019] With the above technical solution, the entire buffer plate needs to be located inside the lifting ring. Therefore, the diameter of the side ring needs to be small. Moreover, when the buffer plate falls, the side ring will be the first to come into contact with the machine. In order to prevent the machine from being damaged, the side ring needs to be made of rubber material with a certain degree of elasticity.

[0020] Furthermore, the feeding mechanism includes a fixed plate, a side conveyor belt, a dual-shaft motor, a side bevel gear, and a feeding frame. The fixed plate is fixedly installed on the top ring side wall, and the side conveyor belt is installed on the fixed plate. One end of the dual-shaft motor drives the side conveyor belt to rotate, and the other end is fixedly connected to the side bevel gear. The side bevel gear meshes with the rotating bevel gear. Several lifting legs are fixedly installed on the top of the fixed plate, and a feeding platform is fixedly installed on the top of the several lifting legs. A feeding cavity is opened inside the feeding platform, and a feeding hole is opened on the top of the feeding platform. The feeding frame is installed in the feeding hole, and several buffer trays are installed in the feeding frame. A feeding component for feeding the buffer trays is provided in the feeding platform.

[0021] Through the above technical solution, the dual-axis motor drives the reciprocating screw to rotate while also driving the side conveyor belt to rotate, thereby causing the buffer discs that fall on the side conveyor belt to be sent to the lifting ring position, achieving the purpose of automatic material replenishment. Several buffer discs set in the feeding frame will enter the hopper body in sequence through the side conveyor belt. The weight of the buffer discs is fixed, so the net weight of the block material in the hopper body can be obtained after calculation.

[0022] Furthermore, the dispensing assembly includes a dispensing motor, a drive wheel, several auxiliary wheels, several rotating wheels, and several rotating columns. The dispensing motor is located at the bottom of the feeding platform. The drive wheel is fixedly located at the output end of the dispensing motor. The several auxiliary wheels and several rotating wheels are rotatably connected to the inside of the feeding chamber. The drive wheel, auxiliary wheels, and rotating wheels are driven by belts. The several rotating columns are fixedly connected to the bottom of the several rotating wheels respectively. The side wall of the rotating column is provided with a spiral groove, and the side ring abuts against the inside of the spiral groove.

[0023] Through the above technical solution, the starting of the motor will cause the drive wheel to rotate. After being driven by the belt and several auxiliary wheels, it will drive the rotating wheel to rotate together, which in turn will cause the rotating column to rotate. The spiral groove set on the side wall of the rotating column will send the buffer discs stuck in it one by one to the side conveyor belt, thereby realizing the automatic feeding of the buffer discs.

[0024] Furthermore, the side conveyor belt is directly opposite the lifting ring, and the width of the side conveyor belt is greater than the diameter of the buffer disc.

[0025] With the above technical solution, the monocrystalline silicon block material will fall from the discharge port into the hopper body. Therefore, the position of the side conveyor belt should not affect the normal feeding of the block material. The buffer plate needs to fall onto the protruding teeth inside the lifting ring under the action of inertia driven by the side conveyor belt.

[0026] The beneficial effects of this invention are as follows: This invention provides a buffer plate below the discharge port of a vibrating screen to buffer monocrystalline silicon blocks, and a lifting and conveying mechanism to carefully place the monocrystalline silicon blocks into a weighing hopper. Driven by a dual-axis motor, the lifting ring lowers the buffer plate to a suitable position inside the hopper, and then the buffer plate and the monocrystalline silicon blocks are placed into the hopper. This reduces the impact between the monocrystalline silicon blocks and the inner wall of the machine during the entire screening, weighing, and packing process, thereby ensuring the integrity of the monocrystalline silicon blocks. This invention incorporates a side ring and a buffer net within a buffer tray. The buffer net, positioned in the center, can catch the falling monocrystalline silicon blocks. The buffer net can be made of a mesh fabric to ensure effective cushioning of the blocks. Furthermore, the side ring is relatively thick, preventing the blocks on the buffer net from directly colliding with the bottom cover or conveyor belt when the buffer tray falls. Moreover, when the buffer tray falls, the side ring will be the first to contact the machine. To prevent damage to the machine, the side ring needs to be made of a rubber material with a certain degree of elasticity. This invention features a feeding assembly on the top ring sidewall for replenishing the buffer mesh. The starting of the feeding motor causes the drive wheel to rotate, which, after transmission via a belt and several auxiliary wheels, drives the rotating wheel to rotate as well. This, in turn, causes the rotating column to rotate. A spiral groove on the sidewall of the rotating column then delivers the buffer discs stuck within it one by one onto the side conveyor belt, thus achieving automatic feeding of the buffer discs. This ensures that the buffer discs are replenished promptly when the vibrating screen outputs monocrystalline silicon blocks. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the hopper body in this invention; Figure 3 This is a cross-sectional view of the hopper body in this invention; Figure 4 This is a second-view schematic diagram of the hopper body cross-section in this invention; Figure 5 yes Figure 4 A magnified view of a section at point A in the middle; Figure 6 This is a schematic diagram of the structural connection between the lifting ring and the buffer plate in this invention; Figure 7 This is a bottom view of the lifting ring and buffer plate in this invention; Figure 8 This is a cross-sectional view of the bottom shell in this invention; Figure 9 yes Figure 8 A magnified view of a section at point B in the middle; Figure 10 This is a schematic diagram of the feeding mechanism in this invention; Figure 11 This is a schematic diagram of the deployment component in this invention.

[0028] Reference numerals: 1. Vibrating screen; 2. Conveyor belt; 3. Baler; 4. Discharge port; 5. Top ring; 6. Hopper body; 7. Bottom cover; 8. Support leg; 9. Weighing module; 10. Support plate; 11. Lifting ring; 12. Guide rod; 13. Reciprocating screw; 14. Rotating bevel gear; 15. Baffle plate; 16. Actuating rod; 17. Extension part; 18. Guide hole; 19. Threaded hole; 20. Protruding tooth; 21. Annular groove; 22. Arc rod; 23. Arc spring; 24. Bottom shell; 25. Placement slot; 26. Side torsion spring; 27. Perforation; 28. Bottom torsion spring; 29. ​​Side ring; 30. Inner ring; 31. Buffer net; 32. Fixing plate; 33. Side conveyor belt; 34. Dual-shaft motor; 35. Side bevel gear; 36. Feeder rack; 37. Lifting leg; 38. Feeding platform; 39. Feeding hole; 40. Dispensing motor; 41. Drive wheel; 42. Auxiliary wheel; 43. Rotating wheel; 44. Rotating column; 45. Spiral trough. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0030] like Figure 1 As shown, this embodiment provides a fully automatic screening, weighing, and packing production line for monocrystalline silicon blocks, including a vibrating screen 1, several weighing hoppers, several conveyor belts 2, and several packing machines 3. Several discharge ports 4 are provided on the side wall of the vibrating screen 1, each weighing hopper is aligned with one discharge port 4, each conveyor belt 2 is located below one weighing hopper, and each packing machine 3 is located on one side of one conveyor belt 2. Monocrystalline silicon blocks of different sizes will fall through different discharge ports 4 and then be packed into boxes according to different specifications.

[0031] Reference Figure 2 , Figure 3 as well as Figure 7The weighing hopper includes a top ring 5, a hopper body 6, two bottom covers 7, and two support legs 8. The two support legs 8 are fixedly mounted at the bottom of the top ring 5, and the two bottom covers 7 are rotatably mounted at the bottom of the hopper body 6. A weighing module 9 is installed between the hopper body 6 and the support legs 8. Two support plates 10 are fixedly mounted on the top of the top ring 5. A lifting and conveying mechanism is installed on the side walls of the two support plates 10. The lifting and conveying mechanism includes a lifting ring 11, a guide rod 12, a reciprocating screw 13, a rotating bevel gear 14, two blocking plates 15, and two actuating rods 16. The guide rod 12 and the reciprocating screw 13 are rotatably connected to the side walls of the two support plates 10, and both the guide rod 12 and the reciprocating screw 13 extend into the hopper body 6. The rotating bevel gear 14 is rotatably connected to the top of the reciprocating screw 13. The lifting ring 11 has extensions 17 on both sides of its sidewalls. The two extensions 17 have guide holes 18 and threaded holes 19 on their sidewalls. The guide rod 12 passes through the guide hole 18, and the reciprocating screw 13 is threaded to the threaded hole 19. The lifting ring 11 has several protruding teeth 20 on its sidewalls. The buffer plate abuts against the top of the protruding teeth 20. Two baffle plates 15 are fixedly installed at the bottom of the guide rod 12 and the reciprocating screw 13, respectively. Two actuating rods 16 are rotatably installed on the top of the baffle plate 15 where the guide rod 12 is located. The guide rod 12 is used to guide the lifting ring 11 and ensure that the lifting ring 11 can rise and fall stably in the hopper body 6. The protruding teeth 20 facilitate the placement of the buffer plate on it, ensuring that the buffer plate can withstand the force of the falling monocrystalline silicon block when it falls from the outlet 4.

[0032] The distance between the baffle plate 15 and the inner wall of the hopper body 6 is greater than 20mm, and the distance between the guide rod 12 and the reciprocating screw 13 and the inner wall of the hopper body 6 is greater than 50mm. One of the baffle plates 15 will rotate together with the reciprocating screw 13. Therefore, ensuring the distance between the baffle plate 15 and the hopper body 6 can effectively avoid unnecessary collisions between it and the inner wall of the hopper body 6. This can not only avoid damage to the inner wall of the hopper body 6, but also avoid misjudgment by the weighing module 9, thereby ensuring the accuracy of the weighing results.

[0033] from Figure 7 - Figure 9As can be seen, the bottom of the lifting ring 11 has an annular groove 21, in which two arc-shaped rods 22 are slidably connected. One end of the two arc-shaped rods 22 abuts against each other, and the other end is fixedly provided with an arc-shaped spring 23. A bottom shell 24 is fixedly provided at the bottom of the lifting ring 11. The arc-shaped rods 22 pass through the inside of the bottom shell 24. Several placement grooves 25 are provided on the side wall of the arc-shaped rods 22. Each placement groove 25 is provided with a side torsion spring 26. Protrusions 20 are provided on the outside of the side torsion springs 26. Several through holes 27 and several protrusions are provided on the side wall of the bottom shell 24. The protruding teeth 20 extend from several perforations 27. The end of the protruding teeth 20 facing the arc spring 23 is arc-shaped. When the lifting ring 11 is driven down to the bottom by the reciprocating screw 13, the actuating rod 16 can push the two arc rods 22 apart, thereby compressing the arc spring 23. As the arc rods 22 move, the protruding teeth 20 will retract into the perforations 27 and be stored in the placement slot 25, without affecting the further movement of the arc rods 22. The side torsion spring 26 will keep the protruding teeth 20 pressed against the side wall of the bottom shell 24.

[0034] Combined with references Figure 4 and Figure 5 As can be seen from the content, the two arc-shaped rods 22 abut against each other at one end with an arc design. The two levers 16 are both located below the abutting position of the two arc-shaped rods 22. The two levers 16 abut against each other on one side and are arc-shaped at the other end. The levers 16 are equipped with a bottom torsion spring 28. The arc-shaped rods 22 and levers 16 allow the levers 16 to push the arc-shaped rods 22 away smoothly when the lifting ring 11 descends, thereby causing the protruding teeth 20 to retract into the through hole 27. Furthermore, the bottom torsion spring 28 ensures that after the lifting ring 11 leaves, the two levers 16 return to a state of mutual support.

[0035] from Figure 6 As can be seen, a buffer plate is installed in the lifting and conveying mechanism. The buffer plate is directly opposite the discharge port 4. The buffer plate includes a side ring 29, an inner ring 30, and a buffer net 31. The inner ring 30 is fixedly installed inside the side ring 29, and the buffer net 31 is installed inside the inner ring 30. The thickness of the side ring 29 is greater than the thickness of the inner ring 30. The side ring 29 abuts against the top of the protruding teeth 20. The buffer net 31, which is set in the middle, can catch the falling monocrystalline silicon block. The material of the buffer net 31 can be set as a mesh fabric to ensure the buffering effect on the block. In addition, the greater thickness of the side ring 29 can also prevent the block on the buffer net 31 from directly colliding with the bottom cover 7 or the conveyor belt 2 when the buffer plate falls.

[0036] The diameter of the side ring 29 is smaller than that of the lifting ring 11. The side ring 29 is made of rubber. The entire buffer plate needs to be located inside the lifting ring 11, so the diameter of the side ring 29 needs to be small. Moreover, when the buffer plate falls, the side ring 29 will be the first to come into contact with the machine. In order to prevent the machine from being damaged, the side ring 29 needs to be made of rubber with a certain degree of elasticity.

[0037] Reference Figure 10 and Figure 11 As can be seen from the content, a feeding mechanism for supplying buffer trays is fixedly installed on the side wall of the top ring 5. The feeding mechanism includes a fixed plate 32, a side conveyor belt 33, a dual-shaft motor 34, a side bevel gear 35, and a feeding frame 36. The fixed plate 32 is fixedly installed on the side wall of the top ring 5, and the side conveyor belt 33 is installed on the fixed plate 32. One end of the dual-shaft motor 34 drives the side conveyor belt 33 to rotate, and the other end is fixedly connected to the side bevel gear 35. The side bevel gear 35 meshes with the rotating bevel gear 14. Several lifting legs 37 are fixedly installed on the top of the fixed plate 32, and a feeding platform 38 is fixedly installed on the top of the several lifting legs 37. The feeding platform 38 has a feeding chamber inside and a feeding hole 39 on the top. The feeding frame 36 is set in the feeding hole 39 and has several buffer discs installed in it. The dual-axis motor 34 drives the reciprocating screw 13 to rotate and also drives the side conveyor belt 33 to rotate. This causes the buffer discs that fall on the side conveyor belt 33 to be sent to the lifting ring 11, thus achieving the purpose of automatic material replenishment. The several buffer discs set in the feeding frame 36 will enter the hopper body 6 in sequence through the side conveyor belt 33. The weight of the buffer discs is fixed, so the net weight of the block material in the hopper body 6 can be calculated.

[0038] The side conveyor belt 33 is directly opposite the lifting ring 11. The width of the side conveyor belt 33 is greater than the diameter of the buffer disc. The monocrystalline silicon block material will fall from the discharge port 4 into the hopper body 6. Therefore, the position of the side conveyor belt 33 should not affect the normal feeding of the block material. The buffer disc needs to fall onto the protruding teeth 20 inside the lifting ring 11 under the action of inertia driven by the side conveyor belt 33.

[0039] The feeding platform 38 is equipped with a feeding assembly for feeding buffer trays. The feeding assembly includes a feeding motor 40, a drive wheel 41, several auxiliary wheels 42, several rotating wheels 43, and several rotating columns 44. The feeding motor 40 is located at the bottom of the feeding platform 38. The drive wheel 41 is fixedly located at the output end of the feeding motor 40. The several auxiliary wheels 42 and several rotating wheels 43 are rotatably connected to the inside of the feeding chamber. The drive wheel 41, auxiliary wheels 42, and rotating wheels 43 are driven by belts. The several rotating columns 44 are fixedly connected to the bottom of the several rotating wheels 43. The side wall of the rotating column 44 is provided with a spiral groove 45. The side ring 29 abuts against the inside of the spiral groove 45. When the feeding motor 40 is started, the drive wheel 41 rotates. After being driven by the belt and the several auxiliary wheels 42, it drives the rotating wheels 43 to rotate together, which in turn causes the rotating column 44 to rotate. The spiral groove 45 on the side wall of the rotating column 44 will send the buffer trays stuck in it one by one to the side conveyor belt 33, thereby realizing the automatic feeding of the buffer trays.

[0040] The working principle of this embodiment is as follows: First, the unprocessed monocrystalline silicon block is put into the vibrating screen 1. After screening, the block will fall from the corresponding discharge port 4 and then fall onto the buffer net 31 above the hopper body 6. Since the protruding teeth 20 inside the lifting ring 11 are in a protruding state at this time, the buffer net 31 and the side ring 29 are located on the protruding teeth 20 at this time. Then the dual-axis motor 34 will start, causing the side bevel gear 35 at the output end of the dual-axis motor 34 to rotate. The rotating bevel gear 14 that meshes with it will drive the reciprocating screw 13 to rotate, thereby causing the lifting ring 11 to fall along the guide rod 12. The lifting ring 11 will drive the buffer plate and the block to fall together until it falls to the position of the lever 16. The lever 16 and the arc rod 22 will squeeze each other, causing the two arc rods 22 to compress the arc spring 23. During the movement of the arc rod 22, the protruding tooth 20 will be pressed into the through hole 27, causing the side torsion spring 26 to be compressed. The protruding tooth 20 will be retracted into the placement groove 25. The buffer plate, due to the loss of support, will fall into the hopper body 6 along with the block. Then, under the action of the reciprocating screw 13, the lifting ring 11 will start to rise. During the upward movement of the lifting ring 11, the feeding motor 40 will start, which will cause the drive wheel 41 to rotate. After being driven by the belt and several auxiliary wheels 42, it will drive the rotating wheel 43 to rotate, which will cause the rotating column 44 to rotate. The spiral groove 45 set on the side wall of the rotating column 44 will send the buffer disc stuck in it to the side conveyor belt 33, thereby realizing the automatic feeding of the buffer disc. Under the action of inertia, the buffer disc will fall onto the lifting ring 11 and lose the support of the actuating rod 16. The two arc rods 22 will return to the initial position under the action of the arc spring 23, so that the protruding teeth 20 will extend again to support the new buffer disc. After repeating the above steps, the weight of the buffer tray can be calculated and removed to obtain the accurate net weight of the block material. When the net weight reaches the specified amount, the bottom cover 7 will be opened, and the stacked buffer trays and blocks will fall onto the conveyor belt 2, and then be conveyed by the conveyor belt 2 to the packaging machine 3 for packaging and boxing.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A fully automatic screening, weighing, and packing production line for monocrystalline silicon blocks, comprising a vibrating screen (1), several weighing hoppers, several conveyor belts (2), and several packing machines (3), characterized in that: The vibrating screen (1) has several discharge ports (4) on its side wall. Each weighing hopper is aligned with a discharge port (4). Each conveyor belt (2) is located below a weighing hopper. Each baler (3) is located on one side of a conveyor belt (2). The weighing hopper includes a top ring (5), a hopper body (6), two bottom covers (7) and two support legs (8). The two support legs (8) are fixedly installed at the bottom of the top ring (5), and the two bottom covers (7) are rotatably installed at the bottom of the hopper body (6). A weighing module (9) is provided between the hopper body (6) and the support legs (8). Two support plates (10) are fixedly installed at the top of the top ring (5). A lifting conveying mechanism is provided on the side wall of the two support plates (10). A buffer plate is installed in the lifting conveying mechanism, and the buffer plate is facing the discharge port (4). The top ring (5) is fixedly provided with a feeding mechanism for supplying the buffer tray.

2. The fully automated screening, weighing, and packing production line for monocrystalline silicon blocks according to claim 1, characterized in that, The lifting and conveying mechanism includes a lifting ring (11), a guide rod (12), a reciprocating screw (13), a rotating bevel gear (14), two baffle plates (15), and two actuating rods (16). The guide rod (12) and the reciprocating screw (13) are rotatably connected to the side walls of the two support plates (10), respectively. The guide rod (12) and the reciprocating screw (13) both extend into the hopper body (6). The rotating bevel gear (14) is rotatably connected to the top of the reciprocating screw (13). The two side walls of the lifting ring (11) are respectively provided with extension parts (17). The extension part (17) has a guide hole (18) and a threaded hole (19) on its side wall. The guide rod (12) passes through the guide hole (18). The reciprocating screw (13) is threadedly connected to the threaded hole (19). The lifting ring (11) has several protruding teeth (20) on its side wall. The buffer plate abuts against the top of the protruding teeth (20). The two blocking plates (15) are fixedly installed at the bottom of the guide rod (12) and the reciprocating screw (13). The two actuating rods (16) are rotatably installed on the top of the blocking plate (15) where the guide rod (12) is located.

3. The fully automated screening, weighing, and packing production line for monocrystalline silicon blocks according to claim 2, characterized in that, The distance between the baffle plate (15) and the inner wall of the hopper body (6) is greater than 20mm, and the distance between the guide rod (12) and the reciprocating screw (13) and the inner wall of the hopper body (6) is greater than 50mm.

4. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 2, characterized in that, The bottom of the lifting ring (11) is provided with an annular groove (21), and two arc-shaped rods (22) are slidably connected in the annular groove (21). One end of the two arc-shaped rods (22) abuts against each other, and the other end is fixedly provided with an arc-shaped spring (23). The bottom of the lifting ring (11) is fixedly provided with a bottom shell (24). The arc-shaped rods (22) pass through the inside of the bottom shell (24). The side wall of the arc-shaped rods (22) is provided with several placement grooves (25). Each placement groove (25) is provided with a side torsion spring (26). The protruding teeth (20) are provided outside the side torsion springs (26). The side wall of the bottom shell (24) is provided with several through holes (27). Several protruding teeth (20) extend from several through holes (27). The end of the protruding teeth (20) facing the arc-shaped spring (23) is arc-shaped.

5. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 4, characterized in that, The two arc-shaped rods (22) abut against each other at one end with an arc design. The two actuating rods (16) are both located below the abutting position of the two arc-shaped rods (22). The two actuating rods (16) abut against each other on one side. The two actuating rods (16) are arc-shaped at one end away from each other. The actuating rods (16) are provided with a bottom torsion spring (28) inside.

6. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 2, characterized in that, The buffer disk includes a side ring (29), an inner ring (30), and a buffer mesh (31). The inner ring (30) is fixedly disposed inside the side ring (29), and the buffer mesh (31) is disposed inside the inner ring (30). The thickness of the side ring (29) is greater than the thickness of the inner ring (30), and the side ring (29) abuts against the top of the protrusion tooth (20).

7. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 6, characterized in that, The diameter of the side ring (29) is smaller than the diameter of the lifting ring (11), and the side ring (29) is made of rubber.

8. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 6, characterized in that, The feeding mechanism includes a fixed plate (32), a side conveyor belt (33), a dual-shaft motor (34), a side bevel gear (35), and a feeding frame (36). The fixed plate (32) is fixedly installed on the side wall of the top ring (5). The side conveyor belt (33) is installed on the fixed plate (32). One end of the dual-shaft motor (34) drives the side conveyor belt (33) to rotate, and the other end is fixedly connected to the side bevel gear (35). The side bevel gear (35) and the rotating bevel gear (1) 4) Engagement: The top of the fixed plate (32) is fixedly provided with several lifting legs (37), and the top of the several lifting legs (37) is fixedly provided with a feeding platform (38). The feeding platform (38) has a feeding cavity inside and a feeding hole (39) on the top of the feeding platform (38). The feeding rack (36) is set in the feeding hole (39). Several buffer plates are installed in the feeding rack (36). The feeding platform (38) is provided with a feeding component for feeding the buffer plates.

9. The fully automated screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 8, characterized in that, The feeding assembly includes a feeding motor (40), a drive wheel (41), several auxiliary wheels (42), several rotating wheels (43), and several rotating columns (44). The feeding motor (40) is located at the bottom of the feeding platform (38). The drive wheel (41) is fixedly located at the output end of the feeding motor (40). Several auxiliary wheels (42) and several rotating wheels (43) are rotatably connected to the inside of the feeding chamber. The drive wheel (41), auxiliary wheels (42), and rotating wheels (43) are driven by belts. Several rotating columns (44) are fixedly connected to the bottom of several rotating wheels (43). The side wall of the rotating column (44) is provided with a spiral groove (45). The side ring (29) abuts against the inside of the spiral groove (45).

10. The fully automatic screening, weighing, and packing production line for monocrystalline silicon ingots according to claim 8, characterized in that, The side conveyor belt (33) is directly opposite the lifting ring (11), and the width of the side conveyor belt (33) is greater than the diameter of the buffer disc.

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