Automatic crushing and screening device for broken glass

Abstract

The present invention relates to an automatic crushing and screening device for broken glass, a conveyor A whose two ends are respectively connected to the outlet of the broken glass raw material bin and the inlet of the first crushing device, a conveyor B whose two ends are respectively connected to the outlet of the first crushing device and the inlet of the second crushing device, a conveyor C whose two ends are respectively connected to the outlet of the second crushing device and the inlet of the screening device, and a conveyor D whose two ends are respectively connected to the outlet of the large particle bin and the inlet of the broken glass raw material bin, the screening device has a powder material discharge port, a qualified product discharge port and a large particle discharge port, and the powder material discharge port, the qualified product discharge port and the large particle discharge port are respectively connected to the feed ports of the powder material bin, the qualified product bin and the large particle bin. The present invention has the following beneficial effects: the overall structure is simple and the screening effect is good, thereby effectively solving the problem that it is difficult to ensure the production quality of glass after crushing due to the large particle size and without screening.

Description

Technical Field

[0001] The invention relates to an automatic crushing and screening device for broken glass, belonging to the technical field of glass recycling. Background Art

[0002] In addition to reducing waste, glass recycling can also save raw materials, slow down the mining process and many other advantages. The main effects of glass recycling are: reducing energy consumption and decarbonization. Every 1,000 kg of glass requires about 1,200 kg of raw materials. The difference of 200 kg is mainly composed of carbon dioxide produced by decarbonization of raw materials. In addition, the chemical reaction produced by melting glass is endothermic. Using glass can save energy in producing products. In the glass batch, adding 10% of broken glass can save 2-3% of energy.

[0003] Glass needs to be crushed during the recycling process. Since the crushed particles are of different sizes, if they are not screened, some large and unqualified particles will still remain inside after crushing. If they are not screened, it is difficult to ensure the quality of the products produced with them. Therefore, an automatic crushing and screening device for broken glass is proposed to solve the above problems. Summary of the invention

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is: to provide an automatic crushing and screening device for broken glass in order to solve one of the above problems.

[0005] The automatic crushing and screening device for broken glass described in the present invention is characterized by comprising a broken glass raw material bin, a first crushing device, a second crushing device, a screening device, a powder bin, a qualified product bin, a large particle bin, a conveyor A whose two ends are respectively connected to the outlet of the broken glass raw material bin and the inlet of the first crushing device, a conveyor B whose two ends are respectively connected to the outlet of the first crushing device and the inlet of the second crushing device, a conveyor C whose two ends are respectively connected to the outlet of the second crushing device and the inlet of the screening device, and a conveyor D whose two ends are respectively connected to the outlet of the large particle bin and the inlet of the broken glass raw material bin, the screening device has a powder discharge port, a qualified product discharge port and a large particle discharge port, and the powder discharge port, the qualified product discharge port and the large particle discharge port are respectively connected to the feed ports of the powder bin, the qualified product bin and the large particle bin.

[0006] Preferably, the screening device is a multi-stage vibrating screen, comprising a screen box, wherein the screen box has an upper screen plate and a lower screen plate parallel to each other, the front end of the screen box is an inlet connected to the upper screen plate, the rear end of the screen box has a powder discharge port connected to the upper screen plate, a qualified product discharge port connected to the lower screen plate, and a large particle discharge port connected to the bottom plate of the screen box, and the lower surface of the bottom plate of the screen box is provided with a vibration motor.

[0007] Preferably, both the first pulverizing device and the second pulverizing device are provided with an air collecting hood, wherein the smoke in the air collecting hood is processed by a bag filter, and the air outlet of the bag filter is connected to an exhaust pipe, and the height of the exhaust pipe is preferably 15m.

[0008] Preferably, the screening device is an auger-conveyor screening device, comprising a screening cylinder body formed by splicing a plurality of screening cylinder monomers end to end, a left end cover plate is buckled on the opening of the screening cylinder monomer at the leftmost end of the screening cylinder body, a right end cover plate is buckled on the opening of the screening cylinder monomer at the rightmost end of the screening cylinder body, a central rotating shaft is coaxially arranged in the screening cylinder body, one end of the central rotating shaft passes through the left end cover plate and is rotatably connected to the left end bearing seat fixed on the left end cover plate, the other end of the central rotating shaft passes through the right end cover plate and is rotatably connected to the right end bearing seat fixed on the right end cover plate, an auger blade is wound around the central rotating shaft in the screening cylinder body, each screening cylinder monomer has sieve holes on its outer wall, and a plurality of screening cylinder monomers are sequentially connected from left to right in the order of increasing sieve hole diameters.

[0009] Preferably, the screening cylinder comprises a first cylindrical body section, a second cylindrical body section, a third cylindrical body section and a fourth cylindrical body section which have the same inner diameter and are connected at the head and tail ends, the left end cover plate is fixed on the left end opening of the first cylindrical body section, the right end cover plate is fixed on the right end opening of the fourth cylindrical body section, the second cylindrical body section is provided with an outer sleeve A on the outer sleeve, the third cylindrical body section is provided with an outer sleeve B on the outer sleeve, the fourth cylindrical body section is provided with an outer sleeve C on the outer sleeve, the outer sleeve A and the second cylindrical body section form a first silo, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve C on the outer sleeve, the outer sleeve A and the second cylindrical body section form a first silo, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve C on the outer sleeve, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve C on the outer sleeve, the outer sleeve A and the second cylindrical body section form a first silo, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve C on the outer sleeve, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve A and the third cylindrical body section are provided with an outer sleeve B and the fourth cylindrical body section are provided with an outer sleeve C on the outer sleeve, the outer sleeve A and the second cylindrical body section form a first silo, the outer sleeve B and the third cylindrical body section are provided with an outer sleeve B and the fourth cylindrical body section are provided with an outer sleeve C on the outer sleeve ... A second silo is enclosed between the cylindrical segments, a third silo is enclosed between the outer sleeve C and the fourth cylindrical segment, a first sieve hole, a second sieve hole and a third sieve hole are respectively provided on the outer walls of the second cylindrical segment, the third cylindrical segment and the fourth cylindrical segment, a powder discharge port, a qualified product discharge port and a large particle discharge port are respectively provided at the bottom of the outer sleeve A, the outer sleeve B and the outer sleeve C, a feed port is provided at the top of the first cylindrical segment, the diameter of the first sieve hole is smaller than the diameter of the second sieve hole, and the diameter of the second sieve hole is smaller than the diameter of the third sieve hole.

[0010] Preferably, the left and right ends of the first cylindrical section are respectively provided with a first flange and a second flange, the two ends of the second cylindrical section are respectively provided with a third flange and a fourth flange, the two ends of the third cylindrical section are respectively provided with a fifth flange and a sixth flange, the two ends of the fourth cylindrical section are respectively provided with a seventh flange and an eighth flange, the left end cover plate and the first flange are connected together by bolt A, the second flange and the third flange are connected together by bolt B, the fourth flange and the fifth flange are connected together by bolt C, the sixth flange and the seventh flange are connected together by bolt D, and the eighth flange and the right end cover plate are connected together by bolt E.

[0011] Preferably, the outer edge of the third flange is provided with a connecting ring A coaxial with the second cylindrical segment, the outer edge of the fourth flange is provided with a connecting ring B coaxial with the second cylindrical segment, and the two ends of the outer sleeve A are respectively sleeved on the connecting ring A and the connecting ring B.

[0012] Preferably, a power mechanism for driving the central shaft to rotate is also fixed on the left end cover plate.

[0013] Preferably, the power mechanism includes a motor mounting seat, a drive motor and an elastic coupling, the motor mounting seat is fixed on the end face of the left end cover plate, the drive motor is fixed on the top of the motor mounting seat, and the power output shaft of the drive motor is connected to the central rotating shaft through the elastic coupling.

[0014] Preferably, the drive motor is a gear reduction motor, which is a combination of a gear reduction box and a motor.

[0015] Preferably, the auger blades are matched with the inner walls of the second cylindrical segment, the third cylindrical segment and the fourth cylindrical segment with a small clearance and have a high coaxial shape and position tolerance accuracy, and the auger blades push the glass particles forward.

[0016] Preferably, the conveyor A is a belt conveyor, and the conveyors B, C and D are all screw conveyors or belt conveyors; and the conveyor D is a pellet elevator.

[0017] Preferably, the first crushing device is a jaw crusher, and the second crushing device is a hammer crusher.

[0018] Preferably, star-shaped feeders are provided at the bottom of the cullet raw material silo, the powder material silo, the qualified product silo and the large particle silo.

[0019] Preferably, a frequency converter connected to the pulverizing motor is also provided on the side wall of the first pulverizing device.

[0020] Preferably, the recycled glass is loaded into a cullet raw material bin by a loader, the recycled glass raw material is sent to a first crushing device by conveyor A for initial crushing of the glass, the glass processed by the first crushing device is transported to a second crushing device by conveyor B for fine crushing, the glass processed by the second crushing device is transported to a screening device by conveyor C for screening, the diameter of the glass particles crushed by the first crushing device is less than 80 mm, the diameter of the glass particles crushed by the second crushing device is less than 50 mm, the screening device screens the glass particles into three specifications of diameters less than 2 mm, 5-50 mm and greater than 50 mm, the glass particles less than 2 mm enter the powder bin, the glass particles 5-50 mm enter the qualified product bin, the glass particles greater than 50 mm enter the large particle bin, the glass particles in the large particle bin are transported to the cullet raw material bin for further processing by conveyor D.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The automatic crushing and screening device for broken glass of the present invention has a simple overall structure and good screening effect, thereby effectively solving the problem that it is difficult to ensure production quality without screening because the particle size of the broken glass is large.

[0023] The automatic crushing and screening device for broken glass of the present invention is a screening device for an auger conveying type screening device. When the driving motor is turned on, the driving motor drives the central rotating shaft to rotate, thereby driving the auger blade to rotate. The glass particle mixture is poured into the first cylindrical section through the feeding port. The auger blade pushes the glass particles forward and enters the second cylindrical section. After screening in the second cylindrical section, the fine glass particles are discharged into the outer sleeve A through the first sieve hole, and are discharged and collected through the powder discharge port. The auger blade pushes the mixture of coarse glass particles and medium qualified glass particles to continue to move forward and enter the third cylindrical section. After screening in the third cylindrical section, the medium qualified glass particles are discharged into the outer sleeve B through the second sieve hole, and are discharged and collected through the qualified product discharge port. The auger blade pushes the coarse glass particles to continue to move forward and enter the fourth cylindrical section. After screening in the fourth cylindrical section, the coarse glass particles are discharged into the outer sleeve C through the third sieve hole, and are discharged and collected through the large particle discharge port, thereby completing the separation of coarse, medium and fine glass particles, and the screening is more uniform and rapid. The right end of the first cylindrical segment and the second cylindrical segment are connected together, and the right end of the second cylindrical segment and the third cylindrical segment are connected together by sleeved outer sleeve A on the outside of the second cylindrical segment, and the right end of the third cylindrical segment and the fourth cylindrical segment are connected together by sleeved outer sleeve B on the outside of the third cylindrical segment. The outer sleeve C is sleeved on the outside of the fourth cylindrical segment to replace the traditional screen structure. The outer sleeves A, B and C are more convenient to disassemble and assemble, which is conducive to inspection and maintenance and more durable. The present invention has the advantages of easy installation, use and maintenance.

[0024] The automatic crushing and screening device for broken glass of the present invention is a screening device of an auger conveying type, which is installed in a split form, and the number of screening cylinder units can be adjusted according to demand to meet different screening needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0028] Figure 3 The structure of the screening device of Example 2 is shown in FIG. Figure 1 ;

[0029] Figure 4 The structure of the screening device of Example 2 is shown in FIG. Figure 1 ;

[0030] Figure 5 This is a schematic structural diagram of the second cylindrical section of Example 2;

[0031] In the figure: 1. cullet raw material silo 2. conveyor A 3. first crushing device 4. conveyor B 5. second crushing device 6. conveyor C 7. screening device 8. powder material silo 9. qualified product silo 10. large particle silo 11. conveyor D 12. screening cylinder 12.1. first cylinder section 12.2. second cylinder section 12.3. third cylinder section 12.4. fourth cylinder section 12.5. feed port 12.6. outer sleeve A 12.7. outer sleeve B 12.8. outer sleeve C 12.9, first sieve hole 12.10, second sieve hole 12.11, third sieve hole 12.12, powder material discharge port 12.13, qualified product discharge port 12.14, large particle discharge port 13, left end cover plate 14, right end cover plate 15, central rotating shaft 16, left end bearing seat 17, right end bearing seat 18, auger blade 19, first flange 20, second flange 21, third flange 22, fourth flange 23, fifth flange 24, sixth flange 25, seventh flange 26, eighth flange 27, connecting ring A 28, connecting ring B 29, driving motor. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings:

[0033] The present invention is further described below by means of specific embodiments, but the present invention is not limited thereto. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0034] Embodiment 1

[0035] like Figure 1 As shown, the automatic crushing and screening device for broken glass comprises a broken glass raw material bin 1, a first crushing device 3, a second crushing device 5, a screening device 7, a powder bin 8, a qualified product bin 9, a large particle bin 10, a conveyor A2 whose two ends are respectively connected to the outlet of the broken glass raw material bin 1 and the inlet of the first crushing device 3, a conveyor B4 whose two ends are respectively connected to the outlet of the first crushing device 3 and the inlet of the second crushing device 5, a conveyor C6 whose two ends are respectively connected to the outlet of the second crushing device 5 and the inlet of the screening device 7, and a conveyor D11 whose two ends are respectively connected to the outlet of the large particle bin 10 and the inlet of the broken glass raw material bin 1, the screening device 7 has a powder discharge port, a qualified product discharge port and a large particle discharge port, and the powder discharge port, the qualified product discharge port and the large particle discharge port are respectively connected to the feed port of the powder bin 8, the qualified product bin 9 and the large particle bin 10.

[0036] In this embodiment, the screening device 7 is a multi-stage vibrating screen, including a screen box, wherein the screen box has an upper screen plate and a lower screen plate parallel to each other, the front end of the screen box is an inlet, which is connected to the upper screen plate, the tail end of the screen box has a powder discharge port connected to the upper screen plate, a qualified product discharge port connected to the lower screen plate, and a large particle discharge port connected to the bottom plate of the screen box, and the lower surface of the bottom plate of the screen box has a vibration motor; the first crushing device 3 and the second crushing device 5 are both provided with an air collecting hood, wherein the smoke in the air collecting hood is processed by a bag dust collector, and the bag dust collector The air outlet of the device is connected to the exhaust pipe, and the height of the exhaust pipe is preferably 15m; the conveyor A2 is a belt conveyor, and the conveyors B4 and C6 are both belt conveyors; the conveyor D11 is a particle material elevator; the first crushing device 3 is a jaw crusher, and the second crushing device 5 is a hammer crusher; the bottoms of the broken glass raw material silo 1, the powder silo 8, the qualified product silo 9 and the large particle silo 10 are all provided with star feeders; the side wall of the first crushing device 3 is also provided with a frequency converter connected to the crushing motor.

[0037] The working principle of this embodiment is as follows: the recycled glass is loaded into the broken glass raw material silo 1 by a loader, the recycled glass raw material is sent to the first crushing device 3 by the conveyor A2 for initial glass crushing, the glass processed by the first crushing device 3 is conveyed to the second crushing device 5 by the conveyor B4 for glass refinement and crushing, the glass processed by the second crushing device 5 is conveyed to the screening device 7 by the conveyor C6 for glass screening, the diameter of the glass particles after crushing by the first crushing device 3 is less than 80mm, the diameter of the glass particles after crushing by the second crushing device 5 is less than 50mm, the screening device 7 screens the glass particles into three specifications of diameters less than 2mm, 5-50mm and greater than 50mm, the glass particles less than 2mm enter the powder silo 8, the glass particles 5-50mm enter the qualified product silo 9, the glass particles greater than 50mm enter the large particle silo 10, and the glass particles in the large particle silo 10 are conveyed to the broken glass raw material silo 1 for further processing by the conveyor D11.

[0038] Example 2, refer to Figure 2-5, which is different from the first embodiment, the screening device 7 is an auger conveying screening device, including a screening cylinder 12 formed by splicing a plurality of screening cylinder monomers end to end, a left end cover plate 13 is buckled on the opening of the screening cylinder monomer at the leftmost end of the screening cylinder 12, and a right end cover plate 14 is buckled on the opening of the screening cylinder monomer at the rightmost end of the screening cylinder 12, a central rotating shaft 15 is coaxially arranged in the screening cylinder 12, one end of the central rotating shaft 15 passes through the left end cover plate 13 and is rotatably connected to the left end bearing seat 16 fixed on the left end cover plate 13, and the other end of the central rotating shaft 15 passes through the right end cover plate 14 and is rotatably connected to the right end bearing seat 17 fixed on the right end cover plate 14, and the screening cylinder A screw blade 18 is wound around the central rotating shaft 15 in 12, and each screening cylinder monomer has a sieve hole on its outer wall, and multiple screening cylinder monomers are connected together from left to right in the order of increasing sieve hole diameters; the screening cylinder body 12 includes a first cylindrical body segment 12.1, a second cylindrical body segment 12.2, a third cylindrical body segment 12.3 and a fourth cylindrical body segment 12.4 with the same inner diameter and connected end to end, the left end cover plate 13 is fixed on the left end opening of the first cylindrical body segment 12.1, the right end cover plate 14 is fixed on the right end opening of the fourth cylindrical body segment 12.4, the second cylindrical body segment 12.2 is provided with an outer sleeve A12.6 on the outer sleeve, and the third cylindrical body segment 12.3 is provided with an outer sleeve The outer sleeve B12.7, the outer sleeve C12.8 is arranged outside the fourth cylindrical section 12.4, the outer sleeve A12.6 and the second cylindrical section 12.2 form a first silo, the outer sleeve B12.7 and the third cylindrical section 12.3 form a second silo, the outer sleeve C12.8 and the fourth cylindrical section 12.4 form a third silo, the outer walls of the second cylindrical section 12.2, the third cylindrical section 12.3 and the fourth cylindrical section 12.4 are respectively provided with a first sieve hole 12.9, a second sieve hole 12.10 and a third sieve hole 12.11, and the bottoms of the outer sleeves A12.6, B12.7 and C12.8 are respectively provided with powder discharge holes The first cylindrical section 12.1 has a feed inlet 12.5 at the top, the diameter of the first sieve hole 12.9 is smaller than the diameter of the second sieve hole 12.10, and the diameter of the second sieve hole 12.10 is smaller than the diameter of the third sieve hole 12.11; the first cylindrical section 12.1 is provided with a first flange 19 and a second flange 20 at the left and right ends, the second cylindrical section 12.2 is provided with a third flange 21 and a fourth flange 22 at the two ends, the third cylindrical section 12.3 is provided with a fifth flange 23 and a sixth flange 24 at the two ends, and the fourth cylindrical section 12.The seventh flange 25 and the eighth flange 26 are respectively provided at both ends of the left end cover plate 13 and the first flange 19 by bolt A, the second flange 20 and the third flange 21 are connected together by bolt B, the fourth flange 22 and the fifth flange 23 are connected together by bolt C, the sixth flange 24 and the seventh flange 25 are connected together by bolt D, and the eighth flange 26 and the right end cover plate 14 are connected together by bolt E; the outer edge of the third flange 21 is provided with a connecting ring A27 coaxial with the second cylindrical segment 12.2, the outer edge of the fourth flange 22 is provided with a connecting ring B28 coaxial with the second cylindrical segment 12.2, and the two ends of the outer sleeve A12.6 are respectively provided with a connecting ring A27 coaxial with the second cylindrical segment 12.2, and the outer edge of the fourth flange 22 is provided with a connecting ring B28 coaxial with the second cylindrical segment 12.2. It is sleeved on the connecting ring A27 and the connecting ring B28; the left end cover 13 is also fixed with a power mechanism for driving the central rotating shaft 15 to rotate; the power mechanism includes a motor mounting seat, a driving motor and an elastic coupling, the motor mounting seat is fixed on the end surface of the left end cover 13, the driving motor is fixed on the top of the motor mounting seat, and the power output shaft of the driving motor is connected to the central rotating shaft 15 through an elastic coupling; the driving motor is a gear reduction motor, which is a combination of a gear reduction box and a motor; the auger blade 18 and the inner wall of the second cylindrical segment 12.2, the third cylindrical segment 12.3 and the fourth cylindrical segment 12.4 are matched with a small gap, and have a high coaxial shape and position tolerance accuracy, and the auger blade 18 pushes the glass particles forward. .

[0039] The working principle of this embodiment is as follows: the number of screening cylinder monomers is adjusted according to demand. In this embodiment, the screening cylinder 12 includes a first cylindrical section 12.1, a second cylindrical section 12.2, a third cylindrical section 12.3 and a fourth cylindrical section 12.4, which have the same inner diameter and are connected at the head and tail. The driving motor is turned on, and the driving motor drives the central rotating shaft 15 to rotate, thereby driving the auger blade 18 to rotate. The glass particle mixture is poured into the first cylindrical section 12.1 through the feed port 12.5, and the auger blade 18 pushes the glass particles forward and enters the second cylindrical section 12.2. After being screened by the second cylindrical section 12.2, the fine glass particles are discharged into the outer sleeve A12.6 through the first sieve hole 12.9, and are discharged and collected through the powder discharge port 12.12. The auger blade 18 pushes the mixture of coarse glass particles and medium qualified glass particles to continue to move forward. , enter the third cylindrical section 12.3, after screening in the third cylindrical section 12.3, the medium qualified glass particles are discharged into the outer sleeve B12.7 through the second sieve hole 12.10, and are discharged and collected through the qualified product discharge port 12.13, and the auger blades 18 push the coarse glass particles to continue to move forward, enter the fourth cylindrical section 12.4, after screening in the fourth cylindrical section 12.4, the coarse glass particles are discharged into the outer sleeve C12.8 through the third sieve hole 12.11, and are discharged and collected through the large particle discharge port 12.14 (the diameters of the first sieve hole 12.9, the second sieve hole 12.10, and the third sieve hole 12.11 are set according to demand, and the diameter of the third sieve hole 12.11 should be large enough to avoid the coarse glass particles from being unable to be discharged and accumulating in the fourth cylindrical section 12.4), completing the separation of coarse, medium and fine glass particles.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic crushing and screening device for broken glass, Features: The invention comprises a cullet raw material bin (1), a first crushing device (3), a second crushing device (5), a screening device (7), a powder material bin (8), a qualified product bin (9), a large particle bin (10), a conveyor A (2) whose two ends are respectively connected to the outlet of the cullet raw material bin (1) and the inlet of the first crushing device (3), a conveyor B (4) whose two ends are respectively connected to the outlet of the first crushing device (3) and the inlet of the second crushing device (5), a conveyor C (6) whose two ends are respectively connected to the outlet of the second crushing device (5) and the inlet of the screening device (7), and a conveyor B (4) whose two ends are respectively connected to the outlet of the first crushing device (3) and the inlet of the second crushing device (5). ) outlet and the inlet of the cullet raw material silo (1), the screening device (7) having a powder material outlet, a qualified product outlet and a large particle outlet, the powder material outlet, the qualified product outlet and the large particle outlet are respectively connected to the feed inlets of the powder material silo (8), the qualified product silo (9) and the large particle silo (10), the screening device (7) is an auger conveying type screening device, comprising a screening cylinder (12) formed by splicing a plurality of screening cylinder monomers end to end, the left end cover plate (13) being buckled on the opening of the leftmost screening cylinder monomer of the screening cylinder (12), and the screening cylinder (12) having a coaxial inner portion. A central rotating shaft (15) is provided, and an auger blade (18) is wound around the central rotating shaft (15) in the screening cylinder (12). The screening cylinder (12) comprises a first cylindrical section (12.1), a second cylindrical section (12.2), a third cylindrical section (12.3) and a fourth cylindrical section (12.4) having the same inner diameter and connected end to end. The second cylindrical section (12.2) is provided with an outer sleeve A (12.6) on its outer shell, the third cylindrical section (12.3) is provided with an outer sleeve B (12.7) on its outer shell, the fourth cylindrical section (12.4) is provided with an outer sleeve C (12.8) on its outer shell, and the second cylindrical section (12.2) is provided with an outer sleeve B (12.7) on its outer shell. The outer walls of the first cylindrical section (12.2), the third cylindrical section (12.3) and the fourth cylindrical section (12.4) are respectively provided with a first sieve hole (12.9), a second sieve hole (12.10) and a third sieve hole (12.11); the bottoms of the outer sleeves A (12.6), B (12.7) and C (12.8) are respectively provided with a powder discharge port (12.12), a qualified product discharge port (12.13) and a large particle discharge port (12.14); the diameter of the first sieve hole (12.9) is smaller than the diameter of the second sieve hole (12.10), and the diameter of the second sieve hole (12.10) is smaller than the diameter of the third sieve hole (12.11), a power mechanism for driving the central rotating shaft to rotate is also fixed on the left end cover plate, the power mechanism includes a motor mounting seat, a driving motor and an elastic coupling, the motor mounting seat is fixed on the end surface of the left end cover plate, the driving motor is fixed on the top of the motor mounting seat, the power output shaft of the driving motor is connected to the central rotating shaft through the elastic coupling, the driving motor is turned on, the driving motor drives the central rotating shaft to rotate, thereby driving the auger blade to rotate, the glass particle mixture is poured into the first cylindrical section through the feed port, the auger blade pushes the glass particles forward, enters the second cylindrical section, and is screened by the second cylindrical section, the fine glass particles The mixture of coarse glass particles and medium qualified glass particles is pushed forward by the auger blades to enter the third cylindrical section. After screening in the third cylindrical section, the medium qualified glass particles are discharged into the outer sleeve B through the second sieve hole and discharged and collected through the qualified product discharge port. The coarse glass particles are pushed forward by the auger blades to enter the fourth cylindrical section. After screening in the fourth cylindrical section, the coarse glass particles are discharged into the outer sleeve C through the third sieve hole and discharged and collected through the large particle discharge port. The separation of coarse, medium and fine glass particles is completed, and the screening is more uniform and fast.

2. The automatic crushing and screening device for broken glass according to claim 1, Features: The screening device (7) is a multi-stage vibrating screen, comprising a screen box, wherein the screen box has an upper screen plate and a lower screen plate parallel to each other, the front end of the screen box is an inlet, which is connected to the upper screen plate, the rear end of the screen box has a powder material discharge port connected to the upper screen plate, a qualified product discharge port connected to the lower screen plate, and a large particle discharge port connected to the bottom plate of the screen box, and the lower surface of the bottom plate of the screen box has a vibration motor.

3. The automatic crushing and screening device for broken glass according to claim 2, Features: The first pulverizing device (3) and the second pulverizing device (5) are both provided with an air collecting hood, wherein the smoke in the air collecting hood is processed by a bag filter, the air outlet of the bag filter is connected to an exhaust pipe, and the height of the exhaust pipe is 15m.

4. The automatic crushing and screening device for broken glass according to claim 3, Features: A right end cover plate (14) is buckled onto the opening of the screening cylinder unit at the rightmost end of the screening cylinder body (12); one end of the central rotating shaft (15) passes through the left end cover plate (13) and is rotatably connected to a left end bearing seat (16) fixed on the left end cover plate (13); the other end of the central rotating shaft (15) passes through the right end cover plate (14) and is rotatably connected to a right end bearing seat (17) fixed on the right end cover plate (14); the outer wall of each screening cylinder unit has a sieve hole, and the plurality of screening cylinder units are sequentially connected from left to right in the order of increasing sieve hole diameters.

5. The automatic crushing and screening device for broken glass according to claim 4, Features: The left end cover plate (13) is fixed on the left end opening of the first cylindrical segment (12.1), and the right end cover plate (14) is fixed on the right end opening of the fourth cylindrical segment (12.4). The outer sleeve A (12.6) and the second cylindrical segment (12.2) form a first material bin, the outer sleeve B (12.7) and the third cylindrical segment (12.3) form a second material bin, and the outer sleeve C (12.8) and the fourth cylindrical segment (12.4) form a third material bin. A feed port (12.5) is provided at the top of the first cylindrical segment (12.1).

6. The automatic crushing and screening device for broken glass according to claim 5, Features: The conveyor A (2) is a belt conveyor, and the conveyor B (4), conveyor C (6) and conveyor D (11) are all screw conveyors or belt conveyors; the conveyor D (11) is a pellet elevator.

7. The automatic crushing and screening device for broken glass according to claim 6, Features: The first crushing device (3) is a jaw crusher, and the second crushing device (5) is a hammer crusher.

8. The automatic crushing and screening device for broken glass according to claim 7, Features: The bottoms of the cullet raw material silo (1), the powder material silo (8), the qualified product silo (9) and the large particle silo (10) are all provided with star-shaped feeders.

9. The automatic crushing and screening device for broken glass according to claim 8, Features: A frequency converter connected to the pulverizing motor is also provided on the side wall of the first pulverizing device (3).

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