Waste tire shredding equipment

Abstract

To provide a waste tire shredding processing device capable of preventing the cutters of a secondary shredding machine from being damaged due to broken pieces of a cutter blade that has fallen off a primary shredding machine flowing into the secondary shredding machine. [Solution] The waste tire crushing processing device of the present invention comprises a primary crusher that crushes waste tires into primary fragments of 5 to 10 cm in size using a two-shaft driven cutter; an X-ray sorter that irradiates the primary fragments with X-rays and separates and removes broken pieces of cutter blades that are damaged during the primary crushing and fall off from the primary crusher; a secondary crusher that crushes the primary fragments that pass through the X-ray sorter without being separated and removed into secondary fragments of 1 to 3 cm in size using a single-shaft driven cutter; and a magnetic sorter that separates fragments including wires from the secondary fragments.

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 damage to the secondary shredding cutter caused by broken pieces of the cutter blade mixed in with the crushed pieces of the waste tire after the primary shredding when the waste tires are subjected to the primary and secondary shredding. [Background technology]

[0002] Patent Document 1 describes cutting waste tires to use them as fuel. The size of waste tires suitable for use as fuel is said to be about 1 inch (= about 2.5 cm). In addition, magnetic sorting is performed to suppress the wire remaining rate to about 5 to 7%. As shown in FIG. 9, a tire has beads 9 made of wires (steel wires). In Patent Document 1, the beads 9 of the waste tires are not removed before being put into the rough cutter, so the load on the cutter is large. Even if the beads 9 are removed, a large number of wires (steel wires) are incorporated in the carcass 39 and belt 40 inside the tire, so the load on the cutter is large. These wires are thin, with a diameter of 0.2 mm, but are twisted wires, and for example, the diameter of nine twisted wires is 0.82 mm. If broken pieces of the blade of the cutter constituting the rough cutter flow downstream, the cutter of the fine cutter may be damaged.

[0003] The waste tire recycling method of Patent Document 2 shows a bead removal process using a bead remover. In addition, in the primary crushing process, a crusher with a two-stage configuration of two-shaft driven cutters is used. In the secondary crushing process after the primary crushing process, a single-shaft driven cutter consisting of a fixed blade section and a rotary blade section is used. The beads of the waste tire are removed by the bead remover shown in FIG. 2, and then the waste tire is divided into multiple pieces in the circumferential direction by a dividing and cutting machine, which are then fed into the two-shaft driven cutter in the primary crushing process. If the blade of the two-shaft driven cutter in the primary crushing process breaks, the broken pieces may flow to the single-shaft driven cutter in the downstream secondary crushing process, damaging the single-shaft driven cutter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2004-309033 A [Patent Document 2] JP 2003-220349 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a waste tire shredding processing device that can prevent the cutters of a secondary crusher from being damaged by broken pieces of a cutter blade that fall off from a 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 fragments of 5 to 10 cm in size using a two-shaft driven cutter; an X-ray sorter that irradiates the primary fragments with X-rays and separates and removes broken pieces of cutter blades that are damaged during the primary crushing and fall off from the primary crusher; a secondary crusher that crushes the primary fragments that pass through the X-ray sorter without being separated and removed into secondary fragments of 1 to 3 cm in size using a one-shaft driven cutter; and a magnetic sorter that separates fragments including wires from the secondary fragments.

[0007] The two-axis drive cutter is characterized in that disks each having a plurality of cutter blades are stacked on each drive shaft, and the cutter blades are arranged in a spiral shape 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. Effect of the Invention

[0009] The tire shredding processing device of the present invention has an X-ray sorting device disposed 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 the 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 in a spiral along the axial direction, which reduces the burden on the cutter blades. In addition, even if the cutter blade breaks, it can be repaired by replacing the disks, 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 description of the drawings]

[0012] [Figure 1] 1 is an overall configuration diagram of a waste tire crushing and processing apparatus according to the present invention. [Diagram 2] FIG. [Diagram 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. [Diagram 5] FIG. 2 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 sorting machine. [Figure 7] This is a structural diagram of a magnetic separator installed downstream of the secondary crusher. [Figure 8] 1 is a flowchart showing a flow of a crushing process for waste tires. [Figure 9] FIG. 1 is a cross-sectional view showing a structure of a tire. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[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 processing device 100 according to the present invention. Waste tires 1 are fed into bead removers 2 arranged in parallel. The waste tires 1 are fed by a feeding conveyor 12. The waste tires 1 leaving the bead removers 2 are fed into primary crushers 3 arranged in parallel. Since the bead removers 2 and primary crushers 3 are arranged in parallel, operation can be continued even if one of them breaks down. 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 of the cutter blade of the primary crusher 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 a cutter blade ...

[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 there are cases where the wire remaining inside the rubber cannot be removed, in which case the rubber crushed pieces 8 will contain some of the wire. Reference numerals 13, 14, 16, and 26 denote delivery conveyors.

[0016] FIG. 2 is an explanatory diagram (front view) of the bead remover 2. The waste tire 1 is transported vertically by the input conveyor 12. The input conveyor 12 is a chain-driven conveyor, and guides (not shown) are provided on both sides to prevent the waste tire 1 from falling over. When the waste tire 1 enters the bead remover 2, a bead puller 10 is inserted into the central opening of the waste tire 1 and pulls it out toward the rear. As shown in the pull-out circle, two beads 9 are pulled out from one waste tire 1. The waste tire 1 from which the beads 9 have been removed is sent out by the delivery conveyor 13. The bead remover 2 is not necessarily an essential component because the cutting performance of the primary crusher 3 has been improved. The waste tire may be directly input into the primary crusher 3. Even if bead fragments remain, they are eventually removed by the magnetic separator 6, so they do not have a negative effect when used 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 tire 1 is 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 tire 1 from falling over. When the waste tire 1 enters the primary crusher 3, the tire pusher 21 presses the waste tire 1 downward to bring it into contact with the two-shaft driven cutter 17. When the two-shaft driven cutter 17 starts crushing, the waste tire is bitten and drawn in, so the tire pusher 21 continues to press until the waste tire 1 is drawn in. The waste tire 1 is crushed into primary crushed pieces 18. The size of the primary crushed pieces 18 is about 5 to 10 cm, and after crushing, they are sent out by the transfer conveyor 14.

[0018] FIG. 4 is a plan view of the two-shaft drive cutter 17 provided inside the primary crusher 3. The two-shaft drive cutter 17 is formed by stacking disk bodies 19 on two parallel shafts. As the disk body 19, for example, four convex cutter blades 20 are arranged with a 90° shift from the adjacent blade. Not limited to this, 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. As viewed from the right side, one of the two shafts rotates right and the other rotates left. The disk bodies 19 are attached clockwise, shifted by, for example, 45° from the adjacent disk body 19 in the axial direction. Not limited to this, they may be attached with a 30° or 15° shift. As shown in Fig. 4, when the disks 19 are stacked with a 45° offset, when the cutter blade 20 of the front rightmost disk 19 faces straight up, the disks 19 are stacked so that the cutter blade 20 of the disk 19 one disk to the left is offset by 45° clockwise, so that the number of cutter blades 20 aligned in the axial direction in the plan view of Fig. 4 is reduced from 12 to half, or 6. In other words, the number of blades that bite into the waste tire 1 at the same time is reduced.

[0019] FIG. 5 is an explanatory diagram (front view) of the X-ray sorter 4 installed downstream of the primary crusher. The 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 the X-ray line sensor 24, and the presence or absence of a broken piece 25 of the cutter blade that has 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] FIG. 6 is a structural diagram (front view) of the secondary crusher 5 installed downstream of the X-ray sorter. The primary crushed pieces 18 sent out from the X-ray sorter 4 by the delivery conveyor 16 are transported to the secondary crusher 5. When the primary crushed pieces 18 move into the inside of the secondary crusher 5, they are pushed out by the pressing rod 29 and crushed into sizes of about 1 to 3 cm by the fixed blade 28 and the rotary blade 27. The rotary blade 27 is formed in a straight line along the axial direction of the rotary roll 32. There is a mesh screen 30 below the rotary blade 27, and crushed pieces of about 1 to 3 cm in size that pass through it are discharged by the delivery conveyor 26 as secondary crushed pieces 31. Crushed pieces larger than about 1 to 3 cm in size cannot pass through the mesh screen 30, so they are lifted up and cut again. As shown by the drawn circle, the rotary blade 27 of the rotary roll 32 is linear in the axial direction and has a triangular uneven shape.

[0021] FIG. 7 is a structural diagram (front view) of the magnetic separator 6 installed downstream of the secondary crusher. The 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 toward 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 to the upper right, so the trajectory of the wire-reinforced crushed pieces 7 is changed to the left and collected in one of the collection boxes. The rubber crushed pieces 8 are not affected by the permanent magnet 33, so the trajectory is not changed 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 inside as described above, and may be configured to incorporate a permanent magnet into the sprocket roll of the belt conveyor.

[0022] FIG. 8 is a flow chart showing the flow of the shredding process of the waste tire shredding processing device according to the present invention. S1 is a process of removing the beads of the waste tire. Each waste tire weighs about 6 to 10 kg. S2 is a process of feeding the waste tire into a primary crusher and performing primary shredding. The primary crushed pieces are cut into pieces of about 5 to 10 cm in size. S3 is a process of separating and removing the broken pieces of the cutter blade of the primary crusher using an X-ray sorter. S4 is a process of secondary shredding the primary crushed pieces after separating and removing the broken pieces of the cutter blade. The secondary crushed pieces are cut into pieces of about 1 to 3 cm in size. This size is suitable for boiler fuel. S5 is a process of separating and removing wires and pieces containing wires from the secondary crushed pieces using a magnetic sorter. The rubber produced by shredding waste tires contains about 10% steel wires. 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 rubber fragments separated by the magnetic separator are collected for use as fuel. Wire is reused as metal. Fragments that contain wire are reused for purposes other than fuel. [Industrial Applicability]

[0023] INDUSTRIAL APPLICABILITY The present invention is suitable for a waste tire shredding processing apparatus that can prevent broken pieces of a cutter blade that have fallen off from a primary crusher from flowing into a secondary crusher and damaging the cutters of the secondary crusher. [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 feed 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 Pressing rod 30 mesh screen 31 Secondary debris 32 Rotating 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 bead remover for removing beads from scrap tires; a primary crusher that crushes the waste tires from which the beads have been removed into primary crushed pieces having a size of 5 to 10 cm using a two-shaft driven cutter; an X-ray sorting machine that irradiates the primary crushed pieces with X-rays and separates and removes broken pieces of the cutter blade that are broken in the primary crushing and dropped out of 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; Equipped with A transfer conveyor is provided to transport the waste tires vertically to the primary crusher, The primary crusher includes a tire pusher that presses the waste tires to contact the two-shaft drive cutter, A waste tire crushing and processing device characterized in that a set of the bead remover and the primary crusher are arranged in parallel, and the primary crushed pieces discharged from the parallel primary crushers are joined together and fed into the X-ray sorting machine.

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

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