Waste tire crushing apparatus

Abstract

To provide a waste tire crushing treatment apparatus capable of preventing the damage of the cutter of a secondary crusher caused by the flow of the broken pieces of the cutter blade falling from a primary crusher to secondary crushing.SOLUTION: The apparatus for shredding waste tires according to the present invention includes a primary shredder for shredding waste tires into primary shredded pieces having a size of 5 to 10cm using a 2-axis driven cutter, an X-ray separator for irradiating the primary shredded pieces with X-rays to separate and remove broken pieces of a cutter blade broken in the primary shredding and dropped from the primary shredder, a secondary shredder for shredding the primary shredded pieces passing through the X-ray separator without being separated and removed into secondary shredded pieces having a size of 1 to 3cm using a 1-axis driven cutter, and a magnetic separator for separating shredded pieces including wires from the secondary shredded pieces.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a waste tire shredding processing device, and more specifically to a waste tire shredding processing device that can prevent the secondary shredding cutter from being damaged by broken pieces of the cutter blade mixed in with the crushed pieces of the waste tire after primary shredding when the waste tires are subjected to primary and secondary shredding. [Background technology]

[0002] Patent Document 1 describes shredding scrap tires to produce fuel. The size of scrap tires suitable for fuel is said to be about 1 inch (approximately 2.5 cm). Furthermore, magnetic sorting is performed to reduce the wire residue rate to about 5-7%. As shown in FIG. 9, tires have beads 9 made of wire (steel wire). In Patent Document 1, scrap tires are fed into a rough cutting machine without removing the beads 9, which places a heavy burden on the cutter. Even after removing the beads 9, the carcass 39 and belt 40 inside the tire still contain numerous wires (steel wires), which places a heavy burden on the cutter. These wires are thin, with a diameter of 0.2 mm, but are twisted wires. For example, the diameter of nine twisted wires is 0.82 mm. If broken pieces from the cutter blades of the rough cutting machine flow downstream, they may damage the cutters of the fine cutting machine.

[0003] The waste tire recycling method of Patent Document 2 discloses a bead removal process using a bead remover. The primary crushing process uses a crusher with a two-stage biaxial drive cutter. The secondary crushing process following the primary crushing process uses a single-axis drive cutter consisting of a fixed blade and a rotary blade. The beads of the waste tire are removed using the bead remover shown in FIG. 2, and then the waste tire is divided into multiple pieces in the circumferential direction using a dividing and cutting machine, which then feed the resulting pieces into the biaxial drive cutter in the primary crushing process. If the blade of the biaxial drive cutter in the primary crushing process breaks, the broken pieces may flow into the single-axis drive cutter in the downstream secondary crushing process, potentially damaging the single-axis drive cutter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2004-309033 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-220349 Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide a waste tire shredding processing device that can prevent the cutters of the secondary crusher from being damaged by broken pieces of the cutter blade that fall off from the primary crusher when shredding waste tires. [Means for solving the problem]

[0006] The waste tire shredding processing device according to the present invention is characterized by comprising: a primary crusher that crushes waste tires into primary crushed pieces of 5 to 10 cm in size using a two-axis driven cutter; an X-ray sorter that irradiates the primary crushed pieces with X-rays and separates and removes broken pieces of the cutter blade that are damaged in the primary crushing and fall off the primary crusher; a secondary crusher that crushes the primary crushed pieces that pass through the X-ray sorter without being separated and removed into secondary crushed pieces of 1 to 3 cm in size using a one-axis driven cutter; and a magnetic sorter that separates crushed pieces including wires from the secondary crushed pieces.

[0007] The two-axis drive cutter is characterized in that disk bodies each having a plurality of cutter blades are stacked on each drive shaft, and the cutter blades are arranged spirally along the axial direction.

[0008] A bead remover is disposed upstream of the primary crusher, and a set of the bead remover and the primary crusher is disposed in parallel. [Effects of the Invention]

[0009] The tire shredding processing device of the present invention has an X-ray sorting device placed between a primary crushing device that crushes waste tires into pieces 5 to 10 cm in size and a secondary crushing device that crushes the pieces into pieces 1 to 3 cm in size, and irradiates the primary crushed pieces with X-rays to separate and remove broken pieces of cutter blades that break and fall off during the primary crushing, thereby preventing damage to the cutters of the secondary crusher by broken pieces of cutter blades.

[0010] The two-axis drive cutter has multiple disks with cutter blades stacked on each drive shaft, and the cutter blades are arranged spirally along the axial direction, which reduces the burden on the cutter blades. Furthermore, even if the cutter blade breaks, it can be repaired by simply replacing the disk, reducing repair costs.

[0011] The bead remover and primary crusher are arranged in parallel, so even if the two-shaft drive cutter of the primary crusher breaks down, operation can continue with the other bead remover and primary crusher.Even if the bead remover breaks down, operation can continue with the other bead remover and primary crusher. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is an overall configuration diagram of a waste tire shredding and processing apparatus according to the present invention. [Figure 2] FIG. [Figure 3] FIG. 2 is an explanatory diagram of a primary crusher installed downstream of the bead remover. [Figure 4] FIG. 2 is a plan view of a two-shaft drive cutter provided inside the primary crusher. [Figure 5] FIG. 1 is an explanatory diagram of an X-ray sorter installed downstream of the primary crusher. [Figure 6] This is a structural diagram of the secondary crusher installed downstream of the X-ray sorter. [Figure 7] This is a structural diagram of a magnetic separator installed downstream of the secondary crusher. [Figure 8] 1 is a flowchart showing the flow of a process for shredding waste tires. [Figure 9] FIG. 1 is a cross-sectional view showing the structure of a tire. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a waste tire shredding and processing apparatus according to the present invention will be described with reference to the drawings.

[0014] FIG. 1 is an overall configuration diagram of a waste tire shredding and processing device 100 according to the present invention. Waste tires 1 are fed into bead removers 2 installed in parallel. The waste tires 1 are fed on a feeding conveyor 12. The waste tires 1 leaving the bead removers 2 are fed into primary crushers 3 installed in parallel. As the bead removers 2 and primary crushers 3 are arranged in parallel, operation can continue even if one of them breaks down. The primary crushed pieces discharged from the two primary crushers 3 are joined together and fed into an X-ray sorter 4. The X-ray sorter 4 detects and separates broken pieces 25 from the cutter blades of the primary crushers 3. The shape of the broken pieces 25 is not fixed, but the length and width of the broken pieces 25 are both 1 to 6 cm, that is, the predetermined area is 1 to 36 cm. 2 If the cutter blade has the above structure, it can be separated from the metal wire. This prevents the broken pieces 25 of the cutter blade from flowing into the secondary crusher 5.

[0015] The primary crushed pieces that leave the X-ray sorter 4 are fed into the secondary crusher 5, where they are further cut into secondary crushed pieces. The secondary crushed pieces discharged from the secondary crusher 5 are fed into the magnetic separator 6, which separates the secondary crushed pieces into wire-containing crushed pieces 7 and rubber crushed pieces 8. A permanent magnet with a strength of about 1 tesla is used, but it may not be possible to remove any wire remaining inside the rubber, in which case the rubber crushed pieces 8 will contain some of the wire. Reference numerals 13, 14, 16, and 26 are delivery conveyors.

[0016] FIG. 2 is an explanatory diagram (front view) of the bead remover 2. Scrap tires 1 are transported vertically by an input conveyor 12. The input conveyor 12 is a chain-driven conveyor, with guides (not shown) on both sides to prevent the scrap tires 1 from tipping over. When a scrap tire 1 enters the bead remover 2, a bead puller 10 is inserted into the central opening of the scrap tire 1 and pulled backward. As shown in the pull-out circle, two beads 9 are pulled out of one scrap tire 1. The scrap tire 1 from which the beads 9 have been removed is then sent out by a delivery conveyor 13. The bead remover 2 is not an essential component, as the cutting performance of the primary crusher 3 has been improved. Scrap tires may be directly input into the primary crusher 3. Any bead fragments remaining are ultimately removed by a magnetic separator 6, so they do not adversely affect their use as fuel.

[0017] FIG. 3 is an explanatory diagram (front view) of the primary crusher 3 installed downstream of the bead remover 2. The waste tires 1 are transported vertically by the transfer conveyor 13. The transfer conveyor 13 is a chain-driven conveyor, and guides (not shown) are provided on both sides to prevent the waste tires 1 from tipping over. When the waste tires 1 enter the primary crusher 3, the tire pusher 21 presses the waste tires 1 downward, bringing them into contact with the two-shaft driven cutter 17. When the two-shaft driven cutter 17 begins shredding, the waste tires are bitten and pulled in, so the tire pusher 21 continues to press down until the waste tires 1 are pulled in. The waste tires 1 are crushed into primary crushed pieces 18. The primary crushed pieces 18 are approximately 5 to 10 cm in size, and after crushing, they are sent out by the transfer conveyor 14.

[0018] FIG. 4 is a plan view of the biaxially driven cutter 17 provided inside the primary crusher 3. The biaxially driven cutter 17 is formed by stacking disk bodies 19 on two parallel shafts. For example, the disk body 19 has four convex cutter blades 20 arranged with a 90° offset from adjacent blades. This is not a limitation, but two cutter blades 20 may be provided on the outer periphery of the disk body 19. The disk bodies 19 are arranged on two shafts so that they overlap each other. When viewed from the right side, one of the two shafts rotates clockwise, and the other rotates counterclockwise. The disk bodies 19 are mounted clockwise, offset by, for example, 45° from the adjacent disk body 19 in the axial direction. However, this is not a limitation, and they may be mounted offset by 30° or 15°. As shown in Figure 4, when the discs 19 are stacked with a 45° offset, when the cutter blade 20 of the front rightmost disc 19 is facing straight up, the discs 19 are stacked so that the cutter blade 20 of the disc 19 one level to the left is offset 45° clockwise, so the number of cutter blades 20 aligned in the axial direction in the plan view of Figure 4 is reduced from 12 to half, or 6. In other words, the number of blades that simultaneously bite into the waste tire 1 is reduced.

[0019] FIG. 5 is an explanatory diagram (front view) of the X-ray sorter 4 installed downstream of the primary crusher. Primary crushed pieces 18 discharged from the primary crusher 3 by the transfer conveyor 14 are transported to the X-ray sorter 4. When the primary crushed pieces 18 move to the internal conveyor 15 of the X-ray sorter 4, an X-ray image is taken by the X-ray source 23 and X-ray line sensor 24, and the presence or absence of broken pieces 25 of the cutter blade that have fallen off the two-axis drive cutter 17 due to damage is inspected. If a broken piece 25 is detected from the X-ray image, it is separated and removed by the sorting plate 35. The remaining primary crushed pieces 18 are sent to the secondary crusher 5 by the transfer conveyor 16.

[0020] Figure 6 is a structural diagram (front view) of the secondary crusher 5 installed downstream of the X-ray sorter. Primary crushed pieces 18, delivered from the X-ray sorter 4 by the transfer conveyor 16, are transported to the secondary crusher 5. As the primary crushed pieces 18 enter the secondary crusher 5, they are pushed out by the push rod 29 and crushed into pieces approximately 1 to 3 cm in size by the fixed blade 28 and the rotary blade 27. The rotary blade 27 is formed linearly along the axial direction of the rotating roll 32. A mesh screen 30 is located below the rotary blade 27, and crushed pieces approximately 1 to 3 cm in size that pass through it are discharged by the transfer conveyor 26 as secondary crushed pieces 31. Crushed pieces larger than approximately 1 to 3 cm cannot pass through the mesh screen 30 and are therefore lifted and re-cut. As shown by the circle, the rotary blade 27 of the rotating roll 32 is linear in the axial direction and has a triangular concave-convex shape.

[0021] FIG. 7 is a structural diagram (front view) of the magnetic separator 6 installed downstream of the secondary crusher. Secondary crushed pieces 31 sent from the secondary crusher 5 by the transfer conveyor 26 are transported to the magnetic separator 6. The secondary crushed pieces 31 are dropped from the top of the magnetic separator 6 onto a stainless steel drum 34 equipped with a permanent magnet 33 inside. The stainless steel drum 34 rotates, and the permanent magnet 33 is fixed at the upper right, so the trajectory of the wire-reinforced crushed pieces 7 changes to the left and is collected in one collection box. Rubber crushed pieces 8 are not affected by the permanent magnet 33, so their trajectory does not change and they are collected in the other collection box. The magnetic separator 6 is not limited to the rotating stainless steel drum 34 equipped with the permanent magnet 33 as described above, but may also be configured with permanent magnets incorporated into the sprocket rolls of a belt conveyor.

[0022] FIG. 8 is a flowchart showing the flow of the shredding process in the waste tire shredding processing device according to the present invention. S1 is a process for removing the beads from the waste tires. Each waste tire weighs approximately 6 to 10 kg. S2 is a process for feeding the waste tires into a primary shredder to perform primary shredding. The primary shredded pieces are cut to a size of approximately 5 to 10 cm. S3 is a process for separating and removing broken pieces from the cutter blades of the primary shredder using an X-ray sorter. S4 is a process for secondary shredding the primary shredded pieces after separating and removing broken pieces from the cutter blades. The secondary shredded pieces are cut to a size of approximately 1 to 3 cm. This size is suitable for use as boiler fuel. S5 is a process for separating and removing wire and fragments containing wire from the secondary shredded pieces using a magnetic sorter. Approximately 10% of the rubber produced by shredding waste tires contains steel wire. To use scrap tires as fuel, those that do not contain a lot of wire have better combustion efficiency and produce less iron oxide during combustion. S6 is the process where crushed rubber pieces separated by a magnetic separator are collected for use as fuel. Wire is reused as metal. Crushed pieces containing wire are reused for purposes other than fuel. [Industrial Applicability]

[0023] INDUSTRIAL APPLICABILITY The present invention is suitable as a waste tire shredding processing device that can prevent broken pieces of cutter blades that have fallen off the primary shredding machine from flowing into the secondary shredding machine and damaging the cutters of the secondary shredding machine. [Explanation of symbols]

[0024] 1. Waste tires 2 Bead remover 3 Primary crusher 4 X-ray sorting machine 5 Secondary crusher 6 Magnetic separator 7 Wire-reinforced fragments 8. Rubber fragments 9 Beads 10 Bead puller 11. Discharge conveyor and input conveyor 12 Input conveyor 13 Delivery conveyor 14 Delivery conveyor 15 Internal conveyor 16 Delivery conveyor 17 2-axis drive cutter 18 Primary fragments 19 Disk (cutter) 20 cutter blade 21 Tire Pusher 23 X-ray source 24 X-ray line sensor 25 Broken piece of cutter blade 26 Delivery conveyor 27 Rotary Blade 28 Fixed blade 29 Push rod 30 mesh screen 31 Secondary debris 32 Roll 33 Permanent magnets 34 Stainless steel drum 35 Sorting Board 39 Carcass 40 Belt 100 Waste tire shredding and processing equipment S1~S6 processing process

Claims

1. A primary crusher that crushes waste tires into primary crushed pieces of 5 to 10 cm in size using a two-axis drive cutter; an X-ray sorting machine that irradiates the primary crushed pieces with X-rays to separate and remove broken pieces of cutter blades that are broken in the primary crushing and fall off from the primary crusher; a secondary crusher that crushes the primary crushed pieces that have passed through the X-ray sorter without being separated and removed into secondary crushed pieces of 1 to 3 cm in size using a single-axis driven cutter; a magnetic separator for separating the wire-containing fragments from the secondary fragments; A waste tire crushing and processing device characterized by being equipped with:

2. The waste tire crushing processing device according to claim 1, characterized in that the two-axis drive cutter has a plurality of disk bodies each having a disk body blade stacked on each drive shaft, and the disk body blades are arranged spirally along the axial direction.

3. 2. The waste tire shredding and processing apparatus according to claim 1, wherein a bead remover is disposed upstream of the primary crusher, and a set of the bead remover and the primary crusher is disposed in parallel.

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