CN116273273A

CN116273273A - Crushing and screening equipment for monocrystalline silicon edge leather

Info

Publication number: CN116273273A
Application number: CN202310295577.9A
Authority: CN
Inventors: 左召明; 余仲元; 陈衡; 韩国旺
Original assignee: Hefei Kaibirui Precision Machine Technology Co ltd
Current assignee: Hefei Kaibirui Precision Machine Technology Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-06-23

Abstract

The invention relates to crushing and screening equipment for monocrystalline silicon edge skin, which comprises the following components: the device comprises a substrate, at least one group of knocking crushing devices, a screening machine and a magnetic separator. The substrate is provided with a blanking port. The knocking and crushing device is arranged above the base plate. Each group of knocking and crushing devices comprises a swinging rod, an alloy hammer, a pin shaft and a transmission mechanism. The pin is fixed relative to the base plate and the axis is parallel to the base plate. The two swing rods are oppositely staggered and are hinged on the pin shaft together, so that an X-shaped cross structure is formed by projection of the two swing rods on a plane perpendicular to the axis of the pin shaft. The head end of each swing rod is fixedly connected with the alloy hammer. The transmission mechanism is matched with the tail ends of the two swing rods, and drives the two swing rods to perform reciprocating staggered swing by taking the pin shafts as rotating shafts through the driving piece, so as to knock and crush monocrystalline silicon edge leather materials to be crushed below the two alloy hammers. The crushing and screening equipment can simulate manual double-hand staggered high-speed beating of the edge leather material, and effectively reduces the powder material and the surface metal content generated by crushing.

Description

Crushing and screening equipment for monocrystalline silicon edge leather

Technical Field

The invention relates to the technical field of monocrystalline silicon processing, in particular to crushing and screening equipment for monocrystalline silicon edge leather.

Background

The monocrystalline silicon edge skin is a tablet left after a monocrystalline silicon rod (round rod) is cut into squares. The offcut can be put into a single crystal furnace to be melted and pulled into a single crystal silicon rod, the offcut with larger size is difficult to put into equipment, and the impact on the melting equipment is caused to have adverse effects, so that the single crystal silicon offcut generally needs to be crushed and then reused. The powder produced by crushing has high content of surface metal, the surface metal is not well cleaned, and the silicon material is polluted.

Currently, there are three general crushing schemes for monocrystalline silicon edge skin materials:

(1) The manual hammer made of special materials is used for crushing the side leather one by one, and the process has high labor intensity and low production efficiency.

(2) The cylinder is used as power, and the edge leather materials are crushed through the cylinder mounting plate, the die mounting plate, the guide rod, the punching plate and the crushing die. The production efficiency of the method is obviously improved compared with that of manual work, but the cylinder has unstable production force, so that the crushing effect is not ideal, more powder materials are easy to produce, the requirement of the particle size of a target product is not met, and meanwhile, the problem of higher surface metal content exists.

(3) The single crystal silicon edge leather is crushed by a jaw crusher, wherein the jaw crusher is a crusher which comprises a crushing cavity formed by two jaw plates of a movable jaw and a static jaw and simulates the movement of the two jaws of an animal to finish the crushing operation of the materials. Although the crushing performance of the jaw crusher is excellent, the inherent structure of the jaw crusher determines that a large amount of powder material products are easy to generate (materials between jaw plates are easy to crush for a plurality of times), and the crushing production requirement of the silicon material is not met, and the silicon material is in more contact and abrasion with the jaw structure during crushing, so that the crushed silicon material has higher content of surface metal, the defects of unsatisfactory crushing effect and high post-treatment difficulty still exist, and the overall processing efficiency of the monocrystalline silicon edge skin material is limited.

Disclosure of Invention

Based on the above, it is necessary to provide a crushing and screening device for monocrystalline silicon side skin material, which aims at the technical problems that more powder materials are easy to generate and the surface metal content of the crushed product is high so that the crushing and screening effect is not ideal in the prior art when the monocrystalline silicon side skin material is crushed and screened.

The invention discloses crushing and screening equipment for monocrystalline silicon edge leather, which comprises the following components: the device comprises a substrate, at least one group of knocking crushing devices, a screening machine and a magnetic separator.

The substrate is provided with a blanking port.

The knocking and crushing device is provided with at least one group which is arranged above the base plate. Each group of knocking and crushing devices comprises a swinging rod, an alloy hammer, a pin shaft and a transmission mechanism. The pin shaft is fixedly arranged relative to the base plate, and the axis is parallel to the plane of the base plate. The number of the alloy hammers corresponds to the number of the swinging rods. The two swing rods are oppositely staggered and are hinged on the pin shaft together, so that the projection of the two swing rods on the plane perpendicular to the axis of the pin shaft is in an X-shaped cross structure. One end of each swing rod is a head end, and the bottom of each swing rod is fixedly connected with the corresponding alloy hammer. The transmission mechanism is matched with the tail ends of the two swing rods, and the torque output by the driving piece drives the two swing rods to perform reciprocating staggered swing by taking the pin shaft as a rotating shaft, so that monocrystalline silicon edge leather materials to be crushed below the two alloy hammers are knocked and crushed.

The screening machine is arranged below the base plate and is used for screening the broken silicon materials falling from the blanking port of the base plate into at least three groups of silicon materials with different particle size ranges, wherein the silicon materials with one group of particle size ranges are the silicon materials with the target particle size.

The magnetic separator is used for reducing one or more metal components in the silicon material with the target particle size screened by the screening machine, so as to obtain a target silicon material product.

As a further improvement of the above solution, the driving member is a driving motor, which is fixedly mounted with respect to the base plate.

The transmission mechanism comprises a crankshaft and a rocker. The crankshaft is rotatably connected with the base plate, the rotating shaft of the crankshaft is parallel to the axis of the pin shaft, and the output shaft of the driving motor is in fit transmission with the crankshaft. The rocking bars are provided with two rocking bars and respectively correspond to the two rocking bars. One end of each rocker is hinged with the tail end of each swing rod, the other end of each rocker is hinged to two eccentric mounting points of the crankshaft, and the two eccentric mounting points are respectively located at two opposite limit positions along the radial direction of the crankshaft.

As a further improvement of the above scheme, the transmission mechanism further comprises a driving wheel and a driven wheel which are positioned in the same plane. The driving wheel is fixedly connected with the output shaft of the driving motor coaxially, the driven wheel is fixedly connected with the crankshaft coaxially, and the driving wheel and the driven wheel are connected through a belt.

The transmission mechanism comprises a turntable and a guide wheel. The turntable is provided with two, and the turntable and the output shaft of the driving motor are coaxially fixed and respectively correspond to the two swinging rods. Grooves with cam structures are respectively formed on the opposite inner sides of the two turntables. And a rotatable guide wheel is arranged at the middle of each swing rod close to the head end and the tail end, the axis of the guide wheel is parallel to the output shaft of the driving motor, and the guide wheel is positioned in the groove of the corresponding turntable. Wherein, the projection of the grooves on the two turntables in the radial direction is axisymmetric.

As a further improvement of the above solution, the crushing and screening apparatus further comprises: and a processing cabinet.

The processing cabinet is internally provided with a cavity structure, the substrate is fixed on the inner wall of the processing cabinet, and the processing cabinet is divided into a crushing chamber which is positioned above the substrate and is open at one side, and a screening chamber which is positioned below the substrate. The inner wall of the crushing chamber is provided with a first strip-shaped through hole for the swing rod to pass through and avoid the swing of the swing rod.

As a further improvement of the scheme, the side, which is open and away from the crushing chamber, of the processing cabinet is fixedly connected with an installation chamber, the knocking device is installed in the installation chamber, and the swinging rod extends into the crushing chamber from the installation chamber through the corresponding first strip-shaped through hole.

As a further improvement of the above, the striking end of the alloy hammer is tapered. The outer surface of the part of the swing rod in the crushing chamber is coated with a polyurethane layer.

As a further improvement of the scheme, a plurality of air suction openings are formed in the crushing chamber.

Wherein, crushing and screening equipment still includes: negative pressure device.

The negative pressure device is arranged on the processing cabinet, and the input end of the negative pressure device is communicated with each air suction inlet.

As a further improvement of the scheme, the knocking and crushing devices are arranged in a plurality of groups, and the knocking and crushing devices are linearly arranged along the extending direction of the base plate.

Wherein, crushing and screening equipment still includes: an electromagnetic feeder.

The electromagnetic feeder is arranged on the upper surface of the base plate. The feeding direction of the electromagnetic feeder corresponds to the extending direction of the base plate, and the feeding end point is positioned on the blanking port of the base plate.

As a further improvement of the above scheme, the sieving machine comprises at least three discharge ports for discharging at least three groups of silicon materials with different particle size ranges respectively. Wherein, the discharge gate of target particle diameter silicon material is located the starting point of magnet separator conveyer belt.

Compared with the prior art, the technical scheme disclosed by the invention has the following beneficial effects:

1. according to the crushing and screening device, the knocking and crushing device capable of simulating manual double-hand staggered high-speed knocking of the edge leather is arranged above the base plate, so that the knocking and crushing efficiency can be effectively improved. The contact between the alloy hammer capable of automatically swinging and the edge leather material is close to point contact during knocking, but not the 'surface contact' of the engagement structure such as a traditional jaw crusher, so that the edge leather material is knocked and crushed by means of the impact force of the point contact moment, and then crushed products directly fall on a substrate, and whether 'large materials' exist or not can be judged according to manual experience and crushing is performed again. Therefore, the powder produced by crushing can be effectively reduced, the crystallinity of the silicon material is improved, the contact area between the alloy hammer and the silicon material is relatively small, and the surface metal content of the crushed product can be effectively reduced under long-time operation.

2. According to the invention, the electromagnetic feeder can be arranged along the extending direction of the substrate, and the plurality of knocking crushing devices are additionally arranged, so that a plurality of crushing stations can be arranged along the feeding direction of the feeder. Therefore, after single crushing, a plurality of operators on the production line can simultaneously select large crushed silicon materials which do not meet the crushing requirement along the feeding direction of the electromagnetic feeder to crush again, the crushing efficiency and the crushing effect are improved, and the repeated work of the large materials falling into the screening machine, the wall screening machine and the subsequent crushing is reduced. In addition, after the plurality of crushing stations are arranged, the conveying speed of the electromagnetic feeder and the conveying belt arranged at the front end of the substrate can be improved, and the crushing efficiency is obviously improved.

Drawings

FIG. 1 is a schematic perspective view of a crushing and screening apparatus for single crystal silicon offcut in example 1 of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic perspective view of the crushing and screening device of FIG. 1 from another perspective;

FIG. 4 is a schematic view of the internal structure of the crushing and screening apparatus of FIG. 3 from a rear perspective;

FIG. 5 is a schematic perspective view of the striking and crushing apparatus of FIG. 4 assembled on a mounting frame, wherein a transmission mechanism adopts a crankshaft connecting rod structure;

FIG. 6 is a schematic illustration of the drive mechanism of the tapping and crushing device of FIG. 5 replaced with an eccentric drive mechanism;

FIG. 7 is a schematic illustration of an alternative cam drive arrangement to the drive mechanism of the tapping and crushing device of FIG. 5;

FIG. 8 is a schematic perspective view of one of the views of the tapping and crushing device of FIG. 7;

FIG. 9 is a schematic perspective view of the tapping and crushing device of FIG. 8 from another perspective;

FIG. 10 is a schematic view showing a partial perspective view of a crushing and screening apparatus according to embodiment 2 of the present invention;

FIG. 11 is a schematic perspective view of a swing rod of the knocking and crushing device in embodiment 3 of the present invention, in which one length adjusting structure is applied;

FIG. 12 is a partial enlarged view at B in FIG. 11;

fig. 13 is an enlarged view of a portion of the pendulum rod of fig. 11 with an alternative length adjustment mechanism.

Description of the main reference signs

1. A substrate; 101. a blanking port; 2. knocking the crushing device; 21. swing rod; 210. a polyurethane layer; 211. a mounting section; 212. a knocking section; 213. a waist-shaped hole; 214. a through hole; 215. a fastening bolt; 216. an arc clamping plate; 22. an alloy hammer; 23. a pin shaft; 24. a transmission mechanism; 241. a crankshaft; 242. a rocker; 2421. a joint bearing of the fish-eye rod end; 243. a driving wheel; 244. driven wheel; 245. a turntable; 2451. a groove; 246. a guide wheel; 25. a bottom plate; 251. a baffle; 252. a second strip port; 26. a mounting frame; 261. a foot support; 3. a driving member; 4. a sieving machine; 41. a discharge port; 5. a magnetic separator; 6. a processing cabinet; 61. a crushing chamber; 611. a first strip port; 612. an air suction port; 62. a sieving chamber; 63. a mounting chamber; 7. a negative pressure device; 8. an electromagnetic feeder; 9. and (5) collecting a box.

The foregoing general description of the invention will be described in further detail with reference to the drawings and detailed description.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Example 1

Referring to fig. 1 to 3, the present embodiment provides a crushing and screening apparatus for monocrystalline silicon edge skin material, including: the base plate 1, the knocking and crushing device 2, the sieving machine 4 and the magnetic separator 5 can also comprise a processing cabinet 6 and a negative pressure device 7. The substrate 1 is provided with a blanking port 101. In this embodiment, the substrate 1 may have a substantially rectangular parallelepiped shape, and one end in the length direction thereof is forward, and the monocrystalline silicon feedstock to be crushed is fed from the forward direction of the substrate 1. In some embodiments, it is also possible to arrange a conveyor belt in the front-up direction of the substrate 1, with a relatively slow rate of continuous feeding of monocrystalline silicon edge dams to be broken onto the substrate 1.

In this embodiment, the striking and crushing apparatus 2 is provided with a set of striking and crushing apparatuses disposed above the base plate 1.

Referring to fig. 4, each group of knocking and crushing devices 2 includes a swing rod 21, an alloy hammer 22, a pin 23, a transmission mechanism 24, and may further include a bottom plate 25 and a mounting frame 26. The pin 23 is fixedly arranged relative to the base plate 1, and the axis is parallel to the plane of the base plate 1, specifically, the pin 23 may be fixedly mounted on the base plate 1.

Wherein, bottom plate 25 fixed connection is on mounting bracket 26, and mounting bracket 26 is in fixed state relative base plate 1. In some embodiments, the mounting frame 26 may be assembled from a plurality of sections, so as to form a hollowed-out structure with a square outer contour. Wherein the four corners of the bottom plate 25 are respectively fixedly arranged at four vertical profiles of the mounting frame 26. The foot supports 261 can be arranged at four corners of the bottom of the mounting frame 26, so that the knocking and crushing device 2 can be used independently (separated from the main body of the equipment), and a collecting box 9 for collecting crushed silicon materials can be arranged beside the knocking and crushing device 2 which is used independently, namely, below the side of the mounting frame 26 with the alloy hammer 22. The mounting frame 26 can also be assembled in the equipment body, i.e. on the processing cabinet 6, the foot support 261 can be removed, and the mounting frame 26 is assembled in the mounting chamber 63 of the processing cabinet 6 through screw holes in the profile.

The number of the alloy hammers 22 corresponds to the number of the swinging rods 21. The two swing rods 21 are oppositely staggered and are hinged on the pin shaft 23, so that the projection of the two swing rods on the plane perpendicular to the axis of the pin shaft 23 is in an X-shaped cross structure. One end of each swing rod 21 is a head end, and the bottom of each swing rod is fixedly connected with a corresponding alloy hammer 22. The transmission mechanism 24 is arranged in a matched mode with the tail ends of the two swing rods 21, and drives the two swing rods 21 to swing in a reciprocating and staggered mode by taking the pin shaft 23 as a rotating shaft through torque output by one driving piece 3, so that monocrystalline silicon edge leather to be broken below the two alloy hammers 22 is knocked and broken.

Referring to fig. 5 to 9, in the present invention, the driving member 3 is a driving motor, which is fixedly installed with respect to the base plate 1, and specifically, can be fixedly installed on the bottom plate 25 by bolts. The transmission 24 may take many forms and may also be provided on the base plate 25. Common transmission structures such as a crankshaft connecting rod structure, an eccentric wheel connecting rod structure and a cam structure can convert torque output by a driving motor into swing of the swing rod 21. In the practical application process, one of the two can be selected for arrangement. In the following, several kinds of transmission mechanisms 24 provided in this embodiment will be described, respectively:

1. the transmission mechanism 24 adopts a crankshaft connecting rod structure

As shown in fig. 5, the transmission mechanism 24 includes a crankshaft 241 and a rocker 242, and may further include a driving wheel 243 and a driven wheel 244 in the same plane. The crankshaft 241 is rotatably connected with the base plate 1, namely, rotatably installed on the bottom plate 25, and the rotation axis of the crankshaft 241 is parallel to the axis of the pin shaft 23, and the output shaft of the driving motor is in fit transmission with the crankshaft 241. The rocking bars 242 are provided with two rocking bars and correspond to the two rocking bars 21 respectively. One end of each rocker 242 is hinged with the tail end of each rocker 21, the other end of each rocker is hinged to two eccentric mounting points of the crankshaft 241, and the two eccentric mounting points are located at two opposite limit positions along the radial direction of the crankshaft 241.

In this structure, the crankshaft 241 has a structure similar to that of a crankshaft in an existing automobile engine, and has two eccentric mounting points provided at the above two extreme positions in order to equalize the striking frequencies of the two alloy hammers 22. In addition, the driving wheel 243 is fixedly connected with the output shaft of the driving motor coaxially, the driven wheel 244 is fixedly connected with the crankshaft 241 coaxially, and the driving wheel 243 and the driven wheel 244 are connected through a belt transmission.

In the actual running process, the crankshaft 241 keeps constant rotation along with the output shaft of the driving motor, and meanwhile, the two rockers 242 (similar to the piston rods in the automobile engine) generate regular movement and shaking, so as to drive the respective hinged rockers 21 to generate uniform up-and-down swinging, and the swinging directions of the two rockers 21 are kept opposite in the same time, namely: one above the other. In this structure, since the motor is located right below the two opposite swing rods 21, the bottom plate 25 may be fixedly connected with a baffle 251, where the baffle 251 is semi-enclosed and is disposed above the driving motor, so as to protect the driving motor.

2. The transmission mechanism 24 adopts an eccentric wheel connecting rod structure

As shown in fig. 6, the structure and principle of the transmission mechanism 24 are similar to those of the crank guide in the first transmission mode, and the eccentric wheel is an eccentric installation point of the guide rod on the rotating disc, and the structure is different from the first transmission mode but can be equivalent to a mechanical structure, and one skilled in the art can select and use according to the arrangement mode when implementing.

3. The transmission mechanism 24 adopts a cam structure

As shown in fig. 7-9, the transmission 24 includes a turntable 245 and a guide wheel 246. The turntable 245 is provided with two, which are coaxially fixed with the output shaft of the driving motor and respectively correspond to the two swinging rods 21. Grooves 2451 with cam structures are respectively formed on the opposite inner sides of the two turntables 245. A rotatable guide wheel 246 is mounted on each swing rod 21 near the middle of the head end and the tail end, the axis of the guide wheel 246 is parallel to the output shaft of the driving motor, and the guide wheel 246 is positioned in a groove 2451 of the corresponding turntable 245. Wherein, the radial projection of the grooves 2451 on the two turntables 245 is axisymmetric.

When the two turntables 245 rotate synchronously, the two guide wheels 246 roll in the grooves 2451 respectively and carry the swing rod 21 to change the posture in the vertical plane. By designing the shape of the groove 2451 and planning the initial positions of the two guide wheels 246 in the respective grooves 2451, the above-mentioned "up-down" swinging effect of the crankshaft connecting rod structure can be achieved, and the specific principle will not be described here again. In addition, a second strip-shaped through hole 252 for avoiding the turntable 245 can be formed in the bottom plate 25. The strip-shaped through openings are provided with two positions which respectively correspond to the two turntables 245. Wherein, the lowest height of the two swinging rods 21 when swinging is not lower than the axial lead height of the two turntables 245.

The transmission mechanism 24 of three transmission modes provided in this embodiment is described above, and it is needless to say that, when the present invention is implemented, other transmission structures capable of producing the same effect may be designed according to the mechanical design principle, so long as the two swing rods 21 can perform reciprocating staggered swing by using the pin 23 as the rotation axis.

When the two swinging rods 21 of the invention perform reciprocating staggered swinging with relatively high frequency, the manual double-hand staggered high-speed beating of the edge leather can be simulated, but the beating efficiency is obviously increased. In practical application, only the monocrystalline silicon edge skin to be broken is needed to be manually 'ended', and the monocrystalline silicon edge skin is placed below the two alloy hammers 22, so that the two alloy hammers 22 alternately strike the edge skin at high frequency. This is because the scrap material is broken by the impact, and has irregularities and randomness, and the drop points and sizes of the broken products are unpredictable, and in order to reduce the cost, an experienced person is selected to observe the size of the broken products, and if the broken products are still unsatisfactory "large materials", the broken products can be immediately taken up and terminated below the alloy hammer 22 again for impact breaking again.

In this embodiment, the striking end of the alloy hammer 22 may be conical, so that when the alloy hammer 22 strikes the scrap metal, the contact between the two is close to "point contact", instead of "surface contact" of the engagement structure such as the conventional jaw crusher, so that the scrap metal is struck and crushed by the impact force of the contact moment, and then the crushed product directly falls on the base plate 1, and whether the scrap metal is "large" is determined according to the manual experience and crushed again. Thus, the crushing characteristics of point contact can effectively reduce the powder material generated by crushing, improve the crystallinity of the silicon material, and the contact area of the alloy hammer 22 and the silicon material is small, so that the surface metal content of the crushed product under long-time operation can be effectively reduced.

When the swing rod 21 swings to the "lowest" position, the axis of the conical alloy hammer 22 is exactly perpendicular to the horizontal plane of the substrate 1. Therefore, the impact force of the monocrystalline silicon edge leather material is proper, the damage to operators is not easy to occur, and the safety coefficient of crushing operation is improved. In addition, the outer surface of the "half" of the swing link 21 near the head end may be coated with a polyurethane layer 210, which is a durable elastomer with good protection.

The processing cabinet 6 has a hollow structure inside, the substrate 1 is fixed on the inner wall of the processing cabinet 1, and the processing cabinet 6 is divided into a crushing chamber 61 which is positioned above the substrate 1 and is open at one side, and a sieving chamber 62 which is positioned below the substrate 1.

Wherein, a first strip-shaped through hole 611 through which the swing rod 21 passes and which is avoided from swinging of the swing rod 21 is formed on the inner wall of the crushing chamber 61. The open side of the processing cabinet 6 facing away from the crushing chamber 61 is also fixedly connected with a mounting chamber 63, the knocking device is mounted in the mounting chamber 63, and the swinging rod 21 extends into the crushing chamber 61 from the mounting chamber 63 through a corresponding first strip-shaped through hole 611. The processing cabinet 6 can improve the integrity of the whole crushing and screening device and provide protection for key devices and mechanisms in the crushing and screening device. Wherein the crushing chamber 61 is open on one side also for the operator to participate in the crushing process. The most of the structure of the knocking and crushing device 2 is arranged in the relatively closed mounting chamber 63, so that the crushing products are prevented from splashing on the transmission mechanism 24 and the driving piece 3, and the maintenance equipment operates normally.

In addition, the crushing chamber 61 may be provided with a plurality of densely distributed air suction openings 612, and the air suction openings 612 may be communicated with a negative pressure device installed at the top of the processing cabinet 6. Specifically, the negative pressure device adopts a negative pressure fan, the input end of the negative pressure fan is communicated with the air suction inlet 612, and the output end of the negative pressure device can be connected with a screen box with a filtering function, so that splashed powdery small materials are sucked in the process of the crushing procedure and discharged into the screen box for collection. Thus, the environment of the operation site can be kept clean, and the workload of the follow-up screening machine 4 can be reduced.

The sieving machine 4 is disposed below the base plate 1, that is, the sieving chamber 62, and is used for sieving the crushed silicon material falling from the blanking port 101 of the base plate 1 into at least three groups of silicon materials with different particle size ranges, wherein the silicon material with one group of particle size ranges is the silicon material with the target particle size. The silicon material with the target particle size is not a large material which needs to be crushed again, is not a powdery small material which does not meet the production requirement, but is a relatively middle particle size range group, and the specific particle size range can be determined according to the production requirement. One of the inventions is to reduce the "small" fraction of the powder prior to the screening step, while reducing the surface metal content of the crushed product.

In this embodiment, the sieving machine 4 includes three discharge ports 41, and can discharge three groups of silicon materials with different particle size ranges, namely, a "large material", a silicon material with a target particle size, and a "small material", where the discharge port 41 of the silicon material with the target particle size is located above the starting point of the conveying end of the magnetic separator 5.

In some embodiments, a plurality of collection boxes 9 may also be provided adjacent to other discharge ports 41 to collect the remaining screened product.

The magnetic separator 5 is used for reducing one or more metal components in the silicon material with the target particle size screened by the screening machine 4, so as to obtain a target silicon material product. In the present invention, although the silicon material is in point contact with the alloy hammer 22 during crushing, a relatively small amount of metal is adhered to the surface thereof, which is unavoidable, and metal may be adhered during sieving and transportation, so that it is necessary to use the magnetic separator 5 to remove the metal on the surface of the silicon material of the target particle size by the magnetic separation technique.

Example 2

Referring to fig. 10, the present embodiment provides a crushing and screening apparatus for single crystal silicon offal, which is different from the crushing and screening apparatus of embodiment 1 in that: the tapping and crushing means 2 are provided with three groups, and the three groups of tapping and crushing means 2 are arranged linearly along the extending direction of the base plate 1. The crushing and screening apparatus further comprises: and an electromagnetic feeder 8.

In other embodiments, the number of the knocking and crushing devices 2 can be set to other reasonable numbers according to the production line requirement, and of course, the more the number of the knocking and crushing devices 2 is, the longer the feeding process of the electromagnetic feeder 8 is.

An electromagnetic feeder 8 is mounted on the upper surface of the base plate 1. The feeding direction of the electromagnetic feeder 8 corresponds to the extending direction of the base plate 1, and the end point of feeding is located on the blanking port 101 of the base plate 1.

Through setting up multiunit and strike breaker 2 and electromagnetic feeder 8 that suits, there is a plurality of operators on the production line along electromagnetic feeder 8's feed direction to select massive monocrystalline silicon limit leather material (i.e. "big material") simultaneously and carry out the breakage, like this, can show improvement crushing efficiency and crushing effect, reduce the "big material" that falls into in the screening machine 4 to reduce the "big material" that gets into screening machine 4, avoid screening machine 4 and broken repetitive work. In addition, after the plurality of crushing stations are arranged, the conveying speed of the electromagnetic feeder 8 and the conveying belt arranged at the front end of the base plate 1 can be increased, and the crushing efficiency is obviously improved.

Example 3

The embodiment provides a single crystal silicon edge skin material knocking and crushing device, which has the advantage of convenient debugging compared with the knocking and crushing device 2 in the embodiment 1 and the embodiment 2.

The striking and crushing apparatus 2 comprises a bottom plate 25, a swing rod 21 and a transmission mechanism 24.

Referring to fig. 11, the swing link 21 includes a mounting section 211 and a striking section 212. One end of the striking section 212 is fixedly connected with a matching alloy hammer 22, and the other end is fixedly connected to one end of the mounting section 211. The mounting section 211 is hinged to the base plate 25. The transmission mechanism 24 is mounted in cooperation with one end of the mounting section 211 away from the knocking section 212, and the swing rod 21 is made to swing reciprocally by using the hinged part of the swing rod as a rotation shaft through the torque output by one driving piece 3. Wherein, the knocking section 212 is detachably and fixedly connected with the mounting section 211, and the length of the swing rod 21 formed by the knocking section and the mounting section is adjustable.

The length of the swing link 21 of the present invention is adjustable, and in this embodiment, this can be achieved in two ways.

Referring to fig. 12, the first way is: the mounting section 211 may be provided with a waist-shaped hole 213, and an extension length of the waist-shaped hole 213 is parallel to a length direction of the swing rod 21. Three through holes 214 can be formed in the knocking section 212 and are sequentially arranged along the length direction of the swing rod 21. The mounting section 211 and the knocking section 212 are fixedly connected through three fastening bolts 215, and the threaded ends of the fastening bolts 215 sequentially extend into the through holes 214 and the waist-shaped holes 213 and are further matched and fixed with corresponding fastening nuts.

In this manner, the fitting of the mounting section 211 and the striking section 212 is achieved by the clamping force between the fastening bolts 215 and the corresponding fastening nuts, and when the fastening bolts 215 are unscrewed, the threaded end of each fastening bolt 215 can slide in the waist-shaped hole 213, so that the mounting section 211 and the striking section 212 are relatively displaced along the extending direction of the waist-shaped hole 213, and the length of the swing link 21 is integrally adjusted.

Referring to fig. 13, the second way is: at least two arc clamping plates 216 are fixedly connected to the mounting section 211, and the two arc clamping plates 216 are distributed along the length direction of the swing rod 21. Each arcuate clamping plate 216 forms a clamping area with the mounting section 211. The striking section 212 is cylindrical in shape with its end facing away from the mallet 22 in turn located in at least two clamping areas and in intimate contact with the arcuate clamping plate 216.

The arc clamping plate 216 is fixedly connected to the mounting section 211 through bolts, and an anti-slip pad is arranged on the inner wall surface of the arc clamping plate 216, so that friction force between the arc clamping plate 216 and the knocking section 212 can be increased, and the holding force of the mounting section 211 to the knocking section 212 is increased.

Both of the above modes can adjust the length of the swing rod 21. Thus, when the knocking and crushing device 2 is integrally installed on the crushing and screening device for monocrystalline silicon edge leather in the embodiment 1, the length of the swing rod 21 is adjusted to adjust the length of the swing rod extending into the crushing chamber 61, so that the knocking and crushing station can be adjusted to a proper position, and the knocking and crushing device is convenient to use in the knocking and crushing process.

The driving mechanism 24 in this embodiment may employ any one of the three transmission structures described in embodiment 1. When the crankshaft connecting rod structure and the eccentric wheel connecting rod structure are adopted, both ends of the rocker 242 can be in threaded connection with the fisheye rod end joint bearing 2421, and both ends of the rocker 242 are respectively in rotational connection with eccentric mounting points of the swing rod 21 and the crankshaft 241 through the fisheye rod end joint bearing 2421. In this way, the whole length of the rocker 242 can be realized by adjusting the matching degree of the fisheye rod end joint bearing 2421 and the end part of the rocker 242, so that the swing amplitude of the rocker 21 can be adjusted, the lowest posture of the rocker 21 can be realized in the earlier debugging stage, the rocker 21 and the base plate 1 can be in a parallel state, the axis of the alloy hammer 22 can be perpendicular to the base plate 1 when the alloy hammer 22 is crashed down, and the striking impact force of the alloy hammer 22 on the monocrystalline silicon edge leather to be broken is ensured.

In addition, the outer surface of the striking section 212 near one end of the mallet 22 is coated with a polyurethane layer 210. When the striking section 212 and/or the alloy hammer 22 and/or the polyurethane layer 210 need to be replaced or maintained, the striking section 212 and its alloy hammer 22 and polyurethane layer 210 are removed by the detachable fixed connection between the striking section 212 and the mounting section 211 as described above.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims

1. A crushing and screening device for monocrystalline silicon offcut, comprising:

a substrate (1) on which a blanking port (101) is formed;

at least one group of knocking and crushing devices (2) arranged above the base plate (1); each group of knocking and crushing devices (2) comprises a swinging rod (21), an alloy hammer (22), a pin shaft (23) and a transmission mechanism (24); the pin shaft (23) is fixedly arranged relative to the base plate (1), and the axis is parallel to the plane of the base plate (1); the number of the alloy hammers (22) corresponds to the number of the swinging rods (21); the two swing rods (21) are oppositely staggered and are hinged on the pin shaft (23) together, so that an X-shaped cross structure is formed by projection of the two swing rods on a plane perpendicular to the axis of the pin shaft (23); one end of each swing rod (21) is a head end, and the bottom of each swing rod is fixedly connected with a corresponding alloy hammer (22); the transmission mechanism (24) is matched with the tail ends of the two swinging rods (21), and the torque output by the driving piece (3) drives the two swinging rods (21) to reciprocate and swing in a staggered manner by taking the pin shaft (23) as a rotating shaft, so that monocrystalline silicon edge leather to be crushed below the two alloy hammers (22) is knocked and crushed;

the screening machine (4) is arranged below the base plate (1) and is used for screening the broken silicon materials falling from the blanking port (101) of the base plate (1) into at least three groups of silicon materials with different particle size ranges, wherein one group of silicon materials with the particle size ranges is the target particle size silicon material; and

and the magnetic separator (5) is used for reducing one or more metal components in the silicon material with the target particle size screened by the screening machine (4) so as to obtain a target silicon material product.

2. The crushing and screening device for monocrystalline silicon offcut according to claim 1, characterized in that the driving member (3) is a driving motor, which is fixedly mounted with respect to the base plate (1);

the transmission mechanism (24) comprises a crankshaft (241) and a rocker (242); the crankshaft (241) is rotatably connected relative to the base plate (1), the rotating shaft of the crankshaft (241) is parallel to the axis of the pin shaft (23), and the output shaft of the driving motor is in fit transmission with the crankshaft (241); the two rocking bars (242) are arranged and respectively correspond to the two rocking bars (21); one end of each rocker (242) is hinged with the tail ends of the two rockers (21), the other end of each rocker is hinged to two eccentric mounting points of the crankshaft (241), and the two eccentric mounting points are located at two opposite limit positions along the radial direction of the crankshaft (241).

3. The crushing and screening device for monocrystalline silicon scrap material in accordance with claim 2, characterized in that the transmission mechanism (24) further comprises a driving wheel (243) and a driven wheel (244) located in the same plane; the driving wheel (243) is coaxially and fixedly connected with an output shaft of the driving motor, the driven wheel (244) is coaxially and fixedly connected with the crankshaft (241), and the driving wheel (243) is connected with the driven wheel (244) through a belt transmission.

4. The crushing and screening device for monocrystalline silicon offcut according to claim 1, characterized in that the driving member (3) is a driving motor, which is fixedly mounted with respect to the base plate (1);

the transmission mechanism (24) comprises a turntable (245) and a guide wheel (246); the turntable (245) is provided with two turntables, and the two turntables are coaxially fixed with the output shaft of the driving motor and respectively correspond to the two swinging rods (21); grooves (2451) with cam structures are respectively formed on the opposite inner sides of the two turntables (245); a rotatable guide wheel (246) is arranged at the middle of each swing rod (21) close to the head end and the tail end, the axis of the guide wheel (246) is parallel to the output shaft of the driving motor, and the guide wheel (246) is positioned in a groove (2451) of the corresponding turntable (245); wherein, the projection of the grooves (2451) on the two turntables (245) in the radial direction is axisymmetric.

5. The crushing and screening device for single crystal silicon offcut according to claim 1, further comprising:

the processing cabinet (6) is of a cavity structure, the substrate (1) is fixed on the inner wall of the processing cabinet (6), and the processing cabinet (6) is divided into a crushing chamber (61) which is positioned above the substrate (1) and is open at one side, and a screening chamber (62) which is positioned below the substrate (1); the inner wall of the crushing chamber (61) is provided with a first strip-shaped through hole (611) for the swing rod (21) to pass through and avoid the swing of the swing rod (21).

6. The crushing and screening device for monocrystalline silicon offcut according to claim 5, characterized in that the side of the processing cabinet (6) facing away from the crushing chamber (61) open is also fixedly connected with a mounting chamber (63), the knocking device is mounted in the mounting chamber (63), and the pendulum rod (21) extends from the mounting chamber (63) into the crushing chamber (61) through a corresponding first strip-shaped through opening (611).

7. The crushing and screening device for single crystal silicon offcut according to claim 6, characterized in that the striking end of the alloy hammer (22) is conical; the outer surface of the part of the swing rod (21) positioned in the crushing chamber (61) is coated with a polyurethane layer (210).

8. The crushing and screening device for monocrystalline silicon scrap material in accordance with claim 5, characterized in that the crushing chamber (61) is provided with a plurality of suction openings (612);

wherein, crushing and screening equipment still includes:

and the negative pressure device (7) is arranged on the processing cabinet (6), and the input end of the negative pressure device (7) is communicated with each air suction inlet (612).

9. The crushing and screening device for monocrystalline silicon edge skin according to claim 1, characterized in that the knocking and crushing devices (2) are provided with a plurality of groups, and the plurality of groups of knocking and crushing devices (2) are linearly arranged along the extending direction of the substrate (1);

wherein, crushing and screening equipment still includes:

an electromagnetic feeder (8) mounted on the upper surface of the substrate (1); the feeding direction of the electromagnetic feeder (8) corresponds to the extending direction of the base plate (1), and the feeding end point is positioned on the blanking port (101) of the base plate (1).

10. The crushing and screening device for monocrystalline silicon scrap material in accordance with claim 1, characterized in that the screening machine (4) comprises at least three discharge ports (41) for discharging the at least three groups of silicon material of different particle size ranges, respectively; wherein the discharge hole (41) of the silicon material with the target particle size is positioned above the starting point of the conveyor belt of the magnetic separator (5).