Birotor hammer type fine crushing equipment for electronic waste

Abstract

The utility model provides electronic waste double-rotor hammer type fine crushing equipment which comprises a crushing main machine, the crushing main machine comprises a base, and a left upper cover and a right upper cover are hinged to the two sides of the top of the base through upper cover pin shafts respectively; a feeding hole is formed in the top of the base and is positioned between the left upper cover and the right upper cover; bearing seats are arranged on the two sides of the base in pairs, crushing rotors are rotationally mounted between the bearing seats, and the two groups of crushing rotors are correspondingly connected with the output ends of the two motors respectively and provide crushing power; an arc-shaped crushing cavity structure used for being matched with the crushing rotor is arranged in the base, and a discharging opening is formed in the position, located below the arc-shaped crushing cavity structure, of the bottom end of the base. The crushing equipment can realize fine separation of copper etching lines and resin on a circuit board in electronic wastes, so that high-efficiency screening of precious metals and resin can be realized subsequently.

Description

Technical Field

[0001] This utility model relates to the field of electronic waste recycling technology, specifically to a dual-rotor hammer mill fine crusher for electronic waste. Background Technology

[0002] Fine crushing of electronic waste is necessary to separate the copper etched lines on the circuit boards from the resin. Most of the rare and precious metals in electronic waste are found in copper particles smaller than 3mm. To further separate the precious metals and resin, both need to be crushed. However, conventional crushing equipment cannot fully separate the copper particles and resin. To obtain more and finer particles, longer crushing time and greater energy consumption are required. Moreover, the uniformity of the fine particles is insufficient, which is not conducive to further sorting. Utility Model Content

[0003] The purpose of this invention is to provide a dual-rotor hammer mill fine crushing device for electronic waste, which can achieve fine separation of copper etching lines on circuit boards and resin in electronic waste, so as to facilitate the efficient screening of precious metals and resin in the subsequent process.

[0004] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A dual-rotor hammer mill fine crushing device for electronic waste includes a crushing host, which includes a base. The top two sides of the base are respectively hinged with a left upper cover and a right upper cover via upper cover pins. A feeding port is provided at the top of the base and in the middle of the left and right upper covers. Bearing seats are provided in pairs on both sides of the base, and a crushing rotor is rotatably installed between the bearing seats. The two sets of crushing rotors are respectively connected to the output ends of two motors and provide crushing power. The interior of the base is provided with an arc-shaped crushing chamber structure for cooperating with the crushing rotors, and a discharge port is provided at the bottom of the base and below the arc-shaped crushing chamber structure.

[0005] Preferably, an upper cover opening mechanism is installed between the upper left cover and the upper right cover and the outer wall of the base, respectively. The upper cover opening mechanism includes a hydraulic cylinder. The cylinder body is hinged to the outer wall of the base through a cylinder body hinge seat, and the piston rod end of the hydraulic cylinder is hinged to the piston rod hinge seat on the outer wall of the corresponding upper left cover and upper right cover.

[0006] Preferably, a locking device is provided on the other side of the upper left and upper right covers that are hinged to the base, and the hydraulic cylinder can only be activated to open the upper left and upper right covers after the locking device is opened.

[0007] Preferably, the arc-shaped crushing chamber structure includes a grid strip disposed at the bottom of the base, and the grid strip is fixed by an arc support plate and an arc pressure plate on the inner sidewalls of the base, the upper left cover and the upper right cover.

[0008] Preferably, the grid strips adopt a cuboid structure with a square cross section, and are arranged in a staggered arc structure concentric with the crushing rotor by arc support plates, and the angle of the grid strips is changed by wedge blocks to form gaps and flanges.

[0009] Preferably, when the raw material is crushed to the qualified size, it is discharged from the gap formed by the grid strips. When the wear gap becomes larger, the gap that meets the requirements can be obtained again simply by changing the angle of the wedge. The flanges of the grid strips are arranged in an orderly manner on the arc and form a stepped wave structure, which can generate impact blades during the crushing process.

[0010] Preferably, the crushing rotor includes a central shaft, both ends of which are rotatably mounted on bearing seats, and the bearing seats are fixed to the base by bolts and positioning blocks;

[0011] The central rotating shaft is alternately fitted with discs and spacers. The outer discs are positioned on the central rotating shaft by keying. Multiple hammer shafts are inserted into the discs in a ring array. The hammers and protective sleeves are alternately and staggered on the hammer shafts.

[0012] Preferably, the hammer head has a cuboid structure with a round hole at one end for mounting on the hammer shaft.

[0013] Preferably, the feeding port adopts an arc-shaped structure, and the outlet of the feeding port is offset at the position of the upper left cover; the side plate of the upper left cover also adopts an arc-shaped side plate, and the arc-shaped side plate cooperates with the side plate of the feeding port.

[0014] The present invention has the following beneficial effects:

[0015] 1. This utility model of crushing equipment can achieve fine separation of copper etching lines on circuit boards and resin in electronic waste, so as to facilitate the efficient screening of precious metals and resin in the subsequent process.

[0016] 2. By employing dual rotors working simultaneously, this utility model effectively increases the overall volume of the crushing cavity, improves processing capacity, and enhances production capacity.

[0017] 3. This utility model uses two rotors rotating at high speed in opposite directions. At the connecting space in the middle, the raw materials collide with each other, which improves the fine separation effect.

[0018] 4. The flanges formed by the staggered arrangement of the grid strips in this utility model form impact blades, which are beneficial for crushing and separating raw materials.

[0019] 5. The grid strip of this utility model can quickly adjust the discharge gap by changing the wedge block, which improves the durability of the grid strip and reduces the cost of use.

[0020] 6. This utility model adopts a rectangular hammerhead, which increases the weight of the hammerhead and effectively expands the range of raw material specifications that can be processed. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the top cover of this utility model being opened.

[0024] Figure 3 This is a schematic diagram of the internal structure of the base cover of this utility model.

[0025] Figure 4 This is a schematic cross-sectional view of the crushing rotor of this utility model.

[0026] Figure 5 This is a three-dimensional structural diagram of the crushing rotor of this utility model.

[0027] In the diagram: 1. Base; 2. Upper left cover; 3. Upper right cover; 4. Crushing rotor; 5. Feed port; 6. Motor; 7. Discharge port; 8. Upper cover pin; 9. Hydraulic cylinder; 10. Grid bar; 11. Arc support plate; 12. Arc pressure plate; 13. Central rotating shaft; 14. Bearing seat; 15. Disc; 16. Spacer; 17. Outer disc; 18. Locking key; 19. Hammer shaft; 20. Hammer head; 21. Protective sleeve; 22. Wedge block.

[0028] Cylinder block hinge seat 902, piston rod 903, piston rod hinge seat 904;

[0029] Gap 2201, flange 2202. Detailed Implementation

[0030] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0031] Example 1:

[0032] See Figure 1-5A dual-rotor hammer mill fine crushing device for electronic waste includes a crushing main unit. The crushing main unit includes a base 1, with a left upper cover 2 and a right upper cover 3 hinged to the top of the base 1 via upper cover pins 8. A feeding port 5 is provided at the top of the base 1, located between the left upper cover 2 and the right upper cover 3. Bearing seats 14 are arranged in pairs on both sides of the base 1, and crushing rotors 4 are rotatably mounted between the bearing seats 14. The two sets of crushing rotors 4 are respectively connected to the output ends of two motors 6, providing crushing power. The interior of the base 1 is provided with an arc-shaped crushing chamber structure for cooperating with the crushing rotors 4, and a discharge port 7 is provided at the bottom of the base 1, located below the arc-shaped crushing chamber structure. By using the above-mentioned fine crushing device, the copper etching lines on the circuit boards in electronic waste can be finely separated from the resin, so as to facilitate the subsequent efficient screening of precious metals and resin.

[0033] The aforementioned hammer mill fine crusher is primarily used for the fine crushing of electronic waste after coarse crushing. Electronic waste fragments enter the arc-shaped crushing chamber structure formed by the grid bars 10 through the feed inlet 5. The crushing rotor 4 on this side rotates at high speed, further finely crushing the input material and simultaneously ejecting it into another arc-shaped crushing chamber structure. The crushing rotor 4 in the other arc-shaped crushing chamber structure rotates at high speed towards the input material, finely crushing it. Simultaneously, the high-speed rotation generates airflow, creating negative pressure that continuously draws the material in, thus achieving high-output. Material not discharged from the arc-shaped crushing chamber structure continues to rotate with its respective crushing rotor. When the material from both sides passes through the connecting area of ​​the two arc-shaped crushing chamber structures, they collide due to the different vector directions of their movement, indirectly promoting crushing and improving efficiency.

[0034] Furthermore, upper left cover 2 and upper right cover 3 are respectively installed with upper cover opening mechanisms between them and the outer wall of base 1. Each upper cover opening mechanism includes a hydraulic cylinder 9. The cylinder body of the hydraulic cylinder 9 is hinged to the outer wall of base 1 via a cylinder body hinge seat 902, and the end of the piston rod 903 of the hydraulic cylinder 9 is hinged to a piston rod hinge seat 904 on the corresponding outer wall of the upper left cover 2 and upper right cover 3. These upper cover opening mechanisms facilitate the opening of the upper left cover 2 and upper right cover 3. This is primarily for the purpose of facilitating the maintenance of the crushing rotor 4, grid bars 10, etc. When internal maintenance is required, the hydraulic cylinder 9 is activated, causing the upper left cover 2 and upper right cover 3 to open, allowing for internal maintenance.

[0035] Furthermore, a locking device 23 is provided on the other side of the upper left cover 2 and the upper right cover 3 that are hinged to the base 1. The cylinder 9 can only be activated to open the upper left cover 2 and the upper right cover 3 after the locking device 23 is opened. The locking device 23 can reliably lock and fix the upper left cover 2 and the upper right cover 3, thereby ensuring that they will not open automatically during operation and guaranteeing safety.

[0036] Furthermore, the arc-shaped crushing chamber structure includes a grid strip 10 disposed at the bottom of the base 1, and the grid strip 10 is fixed by an arc support plate 11 and an arc pressure plate 12 on the inner sidewalls of the base 1, the upper left cover 2 and the upper right cover 3.

[0037] Furthermore, the grid bars 10 adopt a cuboid structure with a square cross-section, and are arranged in a staggered arc structure concentric with the crushing rotor 4 by the arc support plates 11. The angle of the grid bars 10 is changed by the wedges 22 to form gaps 2201 and flanges 2202. When the raw material is crushed to the qualified size, it is discharged from the gaps 2201 formed by the grid bars 10. When the wear gaps become larger, the required gaps can be obtained again by simply changing the angle of the wedges 22. The flanges 2202 of the grid bars 10 are arranged in a staggered and orderly manner on the arc, forming a stepped wave structure, which can generate impact blades during the crushing process. This stepped wave structure greatly improves the crushing efficiency.

[0038] Furthermore, the crushing rotor 4 includes a central rotating shaft 13, with both ends of the central rotating shaft 13 rotatably mounted on bearing seats 14. The bearing seats 14 are fixed to the base 1 by bolts and positioning blocks. Discs 15 and spacers 16 are alternately fitted onto the central rotating shaft 13. An outer disc 17 is positioned and mounted on the central rotating shaft 13 by a locking key 18. Multiple hammer shafts 19 are arranged in a ring array on the discs 15. Hammer heads 20 and protective sleeves 21 are alternately and staggeredly mounted on the hammer shafts 19. The crushing rotor 4 described above can be used for material crushing. During operation, the motor 6 synchronously drives the two central rotating shafts 13, which in turn drive the discs 15. The discs 15 drive the hammer shafts 19, which in turn drive the hammer heads 20 to swing, thereby achieving material crushing through the hammer heads 20.

[0039] Furthermore, the hammerhead 20 has a cuboid structure with a round hole at one end for mounting on the hammer shaft 19. This arrangement and mounting method allows the hammerhead 20 to have a larger rotational hammering space, resulting in a higher linear velocity. Additionally, the cuboid structure allows for larger dimensions, making the faster and heavier hammerhead 20 more effective at crushing raw materials and better adaptable to materials with greater variations, thus promoting continuous production.

[0040] Furthermore, the feeding port 5 adopts an arc-shaped structure, and the outlet of the feeding port 5 is offset at the location of the upper left cover 2; the side plate of the upper left cover 2 also adopts an arc-shaped side plate 201, which cooperates with the side plate of the feeding port 5. The arc-shaped structure of the feeding port 5 ensures the smooth opening of the upper left cover 2 on the one hand, and allows the raw material to quickly enter the crushing chamber through the airflow channel formed by the high-speed rotation of the crushing rotor 4 on the other hand, effectively preventing flying material caused by poor airflow.

[0041] Example 2:

[0042] This utility model provides a crushing method for a dual-rotor hammer mill fine crusher for electronic waste, including the following steps:

[0043] Step 1, Raw material input:

[0044] After the electronic waste fragments are fed into the arc-shaped crushing chamber structure formed by the grid bars 10 from the feed port 5, the crushing rotor 4 on this side rotates at high speed, which further crushes the fed material and throws the material into another arc-shaped crushing chamber structure.

[0045] Step 2, fine crushing of raw materials:

[0046] Meanwhile, the crushing rotor 4 on the other side rotates at high speed in opposite directions to finely crush the thrown raw materials. At the same time, the high-speed rotation generates airflow to form negative pressure, which continuously draws the raw materials over, thereby achieving high output.

[0047] Step 3, further crushing of large-diameter materials:

[0048] The raw materials that are not discharged from the arc-shaped crushing chamber structure continue to rotate with their respective crushing rotors 4. When the raw materials on both sides pass through the connecting area of ​​the arc-shaped crushing chamber structure on both sides, they collide with each other due to the different vector directions of the raw materials, thereby improving the crushing efficiency.

[0049] Step 4, material discharge:

[0050] Once the raw material is crushed to the qualified size, it is discharged from the gap formed by the grid bar 10 and finally discharged from the outlet 7. When the wear gap becomes larger, the angle of the wedge block 22 is changed to obtain the required gap again.

[0051] Step 5, Inspection of crusher rotor 4:

[0052] When it is necessary to inspect the crushing rotor 4, open the locking device 23, start the oil cylinder 9, and drive the upper left cover 2 and the upper right cover 3 to open through the oil cylinder 9, and then carry out internal inspection.

Claims

1. A dual-rotor hammer mill fine crusher for electronic waste, characterized in that, The system includes a crushing host, which includes a base. A left upper cover and a right upper cover are hinged to the top of the base via upper cover pins. A feeding port is located at the top of the base, between the left and right upper covers. Bearing seats are arranged in pairs on both sides of the base, and a crushing rotor is rotatably mounted between the bearing seats. The two sets of crushing rotors are respectively connected to the output ends of two motors, providing crushing power. An arc-shaped crushing chamber structure is provided inside the base to cooperate with the crushing rotors, and a discharge port is located at the bottom of the base, below the arc-shaped crushing chamber structure. The arc-shaped crushing chamber structure includes a grid strip set at the bottom of the base, which is fixed by an arc support plate and an arc pressure plate on the inner sidewalls of the base, the upper left cover and the upper right cover; The grid bars adopt a cuboid structure with a square cross section. They are arranged in a staggered arc structure concentric with the crushing rotor through arc support plates, and the angle of the grid bars is changed by wedge blocks to form gaps and flanges.

2. The dual-rotor hammer mill fine crusher for electronic waste according to claim 1, characterized in that: The upper left and upper right covers are respectively installed with upper cover opening mechanisms between them and the outer wall of the base. The upper cover opening mechanism includes a hydraulic cylinder. The cylinder body is hinged to the outer wall of the base through a cylinder body hinge seat. The piston rod end of the hydraulic cylinder is hinged to the piston rod hinge seat on the outer wall of the corresponding upper left and upper right covers.

3. The dual-rotor hammer mill fine crusher for electronic waste according to claim 2, characterized in that: The upper left and upper right covers are hinged to the base on the other side by a locking device, and the cylinder can only be activated to open the upper left and upper right covers after the locking device is opened.

4. The dual-rotor hammer mill fine crusher for electronic waste according to claim 1, characterized in that: Once the raw material is crushed to the qualified size, it is discharged from the gaps formed by the grid bars. When the wear gaps become larger, the gaps that meet the requirements can be obtained again simply by changing the angle of the wedge. The flanges of the grid bars are arranged in an orderly manner on the arc and form a stepped wave structure, which can generate impact blades during the crushing process.

5. The dual-rotor hammer mill fine crusher for electronic waste according to claim 1, characterized in that: The crushing rotor includes a central shaft, both ends of which are rotatably mounted on bearing seats, which are fixed to the base by bolts and positioning blocks; The central rotating shaft is alternately fitted with discs and spacers. The outer discs are positioned on the central rotating shaft by keying. Multiple hammer shafts are inserted into the discs in a ring array. The hammers and protective sleeves are alternately and staggered on the hammer shafts.

6. The dual-rotor hammer mill fine crusher for electronic waste according to claim 5, characterized in that: The hammer head has a cuboid structure with a round hole at one end for mounting on the hammer shaft.

7. The dual-rotor hammer mill fine crusher for electronic waste according to claim 1, characterized in that: The feeding port adopts an arc-shaped structure, and the outlet of the feeding port is offset at the position of the upper left cover; the side plate of the upper left cover also adopts an arc-shaped side plate, which cooperates with the side plate of the feeding port.

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