CN214440732U

CN214440732U - Screening plant of polycrystalline silicon material

Info

Publication number: CN214440732U
Application number: CN202022558733.0U
Authority: CN
Inventors: 余圈珠; 杨延生; 韩永龙; 高生全
Original assignee: Solargiga Energy Qinghai Co ltd
Current assignee: Solargiga Energy Qinghai Co ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-10-22
Anticipated expiration: 2030-11-09

Abstract

The utility model discloses a screening plant of polycrystalline silicon material, including pounding material platform basket, the screening basket, the dust remover, the dust absorption tuber pipe, the dust absorption baffle, the dust absorption hole, the discharge gate, support A, support B, shake the motor, the connecting rod, the eccentric wheel connecting rod, damping spring, the screening net, the screening hole, the large granule discharge gate, the tiny particle discharge gate, the device sieves polycrystalline silicon granule propelling movement to the screening basket of slope in the crushing stage of pounding the material platform, open the effectual powder that has reduced and produce in pounding the material platform of dust remover at the screening in-process and to the pollution of polycrystalline silicon granule, rock about the eccentric wheel through installing at the screening basket bottom, the high-quality polycrystalline silicon granule is selected to the better, and the efficiency of screening is improved, and manpower and materials are saved.

Description

Screening plant of polycrystalline silicon material

Technical Field

The utility model belongs to the technical field of the screening of polycrystalline silicon material, concretely relates to screening plant of polycrystalline silicon material.

Background

The polysilicon has gray metallic luster, has larger chemical activity in a high-temperature molten state, and can act with almost any material. The semiconductor material has semiconductor properties, is an extremely important excellent semiconductor material, is an electronic information base material of a semiconductor device such as modern artificial intelligence, automatic control, information processing, photoelectric conversion and the like, and the conductivity of the semiconductor device can be greatly influenced by a trace amount of impurities.

In the process of pulling the single crystal, the problems of new impurities introduced in the crushing and screening process of the raw material polycrystalline silicon, low production efficiency, backward equipment, low screening quality, easy damage of the equipment and the like generally exist. The device aims to realize that impurities are not introduced during the separation of the polycrystalline silicon, and simultaneously, the labor intensity is reduced, and the occupational health hazards are reduced.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model provides a screening plant of polycrystalline silicon material, the device can effectively solve polycrystalline silicon and introduce new impurity at broken screening in-process and be polluted to and the problem of screening efficiency inefficiency and occupational health harm after the breakage.

For realizing the purpose of the utility model, the utility model adopts the following technical scheme:

the utility model provides a screening plant of polycrystalline silicon material, includes pounding material platform basket, screening basket, the discharge gate, support A, support B shakes the motor, the connecting rod, the eccentric wheel connecting rod, damping spring sieves the net, the large granule discharge gate, the small granule discharge gate, its characterized in that: the material smashing platform basket is fixedly supported on the support A, and a discharge hole is formed in one side of the material smashing platform basket; the discharge port is connected with one end of the screening basket; two ends of the bottom of the screening basket are connected with damping springs, and an eccentric wheel is arranged in the middle of the bottom; the damping spring is fixedly connected to the bracket B; one end of the eccentric wheel is connected with a rapping motor through a connecting rod, and the other end of the eccentric wheel is fixed at the bottom of the screening basket through an eccentric wheel connecting rod; a screening net is laid in the screening basket body; the screening net divides the screening basket into an upper space and a lower space; the rear end of the screening basket is sequentially provided with a large particle discharge port and a small particle discharge port from top to bottom, the large particle discharge port is communicated with the space above the screening net in the screening basket, and the small particle discharge port is communicated with the space below the screening net in the screening basket; and a plurality of screening holes are formed in the screening net.

Furthermore, the screening device also comprises a dust remover, a dust absorption air pipe and a dust absorption baffle; the middle position of the top of the smashing platform basket is communicated with a dust absorption air pipe, the other end of the dust absorption air pipe is connected with a dust remover, an inclined dust absorption baffle is arranged on the inner side of the smashing platform basket, and 2 square dust absorption holes are arranged in parallel on the dust absorption baffle.

Furthermore, the bottom of the dust absorption baffle and the bottom of the smashing platform basket are inclined at an included angle of 30 degrees.

Furthermore, 3 damping springs are arranged, 2 damping springs are arranged at the bottom of the front end of the screening basket side by side, and 1 damping spring is arranged in the middle of the bottom of the rear end of the screening basket.

Furthermore, the screening basket is obliquely arranged on the bracket B, and the inclination angle is 30 degrees.

Furthermore, the aperture of the screening hole is 2-3 cm.

Furthermore, the inner wall of the dust remover, the inner wall of the screening basket and the screening net are all made of silicon nitride.

Compared with the prior art, the utility model, following beneficial effect has:

1. through the dust removal equipment arranged behind the smashing platform, when the material block is placed to begin smashing and screening the material block, the dust removal equipment is started to absorb dust, and the influence on the service performance caused by the impurities entering the polycrystalline silicon powder in the crushing and screening process is avoided.

2. Through shaking the motor cooperation screen cloth, can avoid the polycrystalline silicon after the breakage to block up the sieve mesh, can sieve out the polycrystalline silicon powder of not unidimensional again respectively, promoted the broken screening efficiency of device greatly.

3. The inner wall of the dust removing equipment, the inner wall of the vibrating screen classifier and the bottom surface of the screening frame are made of materials which do not pollute polycrystalline silicon powder, so that the possibility of pollution of polycrystalline silicon in the crushing process is reduced to the maximum extent, and the product performance of the crushed polycrystalline silicon is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a polysilicon material screening device according to the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a schematic structural view of a material smashing platform basket and a bracket A;

FIG. 4 is a cross-sectional view of a screening basket and bottom attachment structure;

FIG. 5 is a schematic diagram of a screen;

in the figure: smashing platform basket-1, screening basket-2, dust collector-3, dust collecting air pipe-4, dust collecting baffle-5, dust collecting hole-6, discharge hole-7, support-A8, support-B9, rapping motor-10, connecting rod-11, eccentric wheel-12, eccentric wheel connecting rod-13, damping spring-14, screening net-15, screening hole-16, large granule discharge hole-201 and small granule discharge hole-202.

Detailed Description

The drawings in the embodiments of the present invention will be combined; the technical scheme in the embodiment of the utility model is clearly and completely described;

as shown in fig. 1-5, in an embodiment of the present invention, a polysilicon material screening device includes a pounding platform basket 1, a screening basket 2, a dust collector 3, a dust collecting air duct 4, a dust collecting baffle 5, a dust collecting hole 6, a discharge hole 7, a bracket A8, a bracket B9, a rapping motor 10, a connecting rod 11, an eccentric wheel 12, an eccentric wheel connecting rod 13, a damping spring 14, a screening net 15, a screening hole 16, a large particle discharge hole 201, and a small particle discharge hole 202. The smashing platform basket 1 is fixedly supported on a support A8; a discharge port 7 is formed in one side of the smashing platform basket 1, one end of the discharge port 7 is connected with the screening basket 2, massive granular polycrystalline silicon material stones smashed manually in the smashing platform basket are manually pushed to the screening basket 2 through a discharge port 102, and the crushed polycrystalline silicon powder with different sizes is screened and distinguished; the inner side of the smashing platform basket 1 is provided with an inclined dust collection baffle 5, and the bottom of the dust collection baffle 5 and the bottom of the smashing platform basket are inclined at an included angle of 30 degrees, so that the dust collection area can be effectively increased, and impurities in polycrystalline silicon powder are prevented from entering to influence the service performance of the polycrystalline silicon powder; the dust absorption baffle 5 is provided with two square dust absorption holes 101, and the powder flying up during material smashing can be absorbed into the dust remover 3 through the dust absorption holes 101; the bottoms of the front end and the rear end of the screening basket 2 are connected with damping springs 14 through fixing bolts; the damping spring 14 is vertically and fixedly connected to the bracket B9, and can play a role in damping during screening, so that polycrystalline silicon particles are prevented from splashing out of the screening basket 2 due to overlarge acting force; an eccentric wheel 12 is installed in the middle of the bottom of the screening basket 2, one end of the eccentric wheel is connected with a rapping motor 10 through a connecting rod 11, the other end of the eccentric wheel is fixed at the bottom of the screening basket 2 through an eccentric wheel connecting rod 13, and when the rapping motor 4 is started, the screening basket 2 shakes left and right along with the eccentric wheel 12 in the material screening process to perform screening; the screening basket 2 is obliquely arranged on the bracket B (9) at an inclination angle of 30 degrees, a screening net 15 is laid in a basket body of the screening basket 2, and the screening basket 2 is divided into an upper space and a lower space by the screening net 15; the rear end of the screening basket 2 is sequentially provided with a large particle discharge port 201 and a small particle discharge port 202 from top to bottom, the large particle discharge port 201 is communicated with the space above a screening net 15 in the screening basket 2, the small particle discharge port 202 is communicated with the space below the screening net 15 in the screening basket 2, a plurality of screening holes 16 are formed in the screening net 15, the crushed polycrystalline silicon powder with different sizes is screened and distinguished, the screening holes 16 are circular, and the aperture is 2-3 cm; during screening, the screened polysilicon particles can roll down from the large particle outlet 201 and the small particle outlet 202 through the inclined screening basket. Through shaking 4 cooperation screening nets of motor, can avoid the polycrystalline silicon after the breakage to block up sieve mesh 5, can sieve out the polycrystalline silicon powder of not unidimensional again respectively, promoted the broken screening efficiency of device greatly.

Specifically, pound the top intermediate position intercommunication dust absorption tuber pipe 6 of material platform basket 1, be connected with dust remover 3 through U type dust absorption tuber pipe 6, start to pound when expecting to open dust remover 3 and remove dust on pounding material platform 1, the effectual dust that eliminates the broken in-process of polycrystalline silicon production avoids its diffusion to the air in, brings harm to the staff.

Specifically, there are 3 damping springs 14, and 2 damping springs are installed side by side at the bottom of the front end of the screening basket and 1 damping spring is installed in the middle of the bottom of the rear end of the screening basket.

Specifically, the materials of the inner wall of the dust remover 3, the inner wall of the screening basket 2 and the screening net 15 are all selected from materials which do not pollute polycrystalline silicon powder, preferably silicon nitride, so that the possibility that the crushed polycrystalline silicon is polluted in the whole crushing and screening process is eliminated, the possibility that the polycrystalline silicon is polluted in the crushing process can be reduced to the maximum extent, and the product performance of the crushed polycrystalline silicon is ensured.

Claims

1. A screening device for polycrystalline silicon materials comprises a smashing platform basket (1), a screening basket (2), a discharge port (7), a support A (8), a support B (9), a rapping motor (10), a connecting rod (11), an eccentric wheel (12), an eccentric wheel connecting rod (13), a damping spring (14), a screening net (15), a large-particle discharge port (201) and a small-particle discharge port (202); the method is characterized in that: the smashing platform basket (1) is fixedly supported on the support A (8), and a discharge hole (7) is formed in one side of the smashing platform basket (1); the discharge port (7) is connected with one end of the screening basket (2); two ends of the bottom of the screening basket (2) are connected with damping springs (14), and an eccentric wheel (12) is arranged in the middle of the bottom;

the damping spring (14) is fixedly connected to the support B (9); one end of the eccentric wheel (12) is connected with a rapping motor (10) through a connecting rod (11), and the other end of the eccentric wheel is fixed at the bottom of the screening basket (2) through an eccentric wheel connecting rod (13); a screening net (15) is laid in the basket body of the screening basket (2); the screening net (15) divides the screening basket (2) into an upper space and a lower space; the rear end of the screening basket (2) is sequentially provided with a large particle discharge port (201) and a small particle discharge port (202) from top to bottom, the large particle discharge port (201) is communicated with the space above the screening net (15) in the screening basket (2), and the small particle discharge port (202) is communicated with the space below the screening net (15) in the screening basket (2); the screening net (15) is provided with a plurality of screening holes (16).

2. The polysilicon material screening device according to claim 1, wherein: the screening device also comprises a dust remover (3), a dust absorption air pipe (4) and a dust absorption baffle plate (5); the middle position of the top of the smashing platform basket (1) is communicated with a dust collection air pipe (4), the other end of the dust collection air pipe (4) is connected with a dust remover (3), an inclined dust collection baffle (5) is arranged on the inner side of the smashing platform basket (1), and 2 square dust collection holes (6) are arranged in parallel on the dust collection baffle (5).

3. A screening device for polysilicon material according to claim 2, wherein: the bottom of the dust absorption baffle (5) and the bottom of the smashing platform basket (1) are inclined at an included angle of 30 degrees.

4. The polysilicon material screening device according to claim 1, wherein: the number of the damping springs (14) is 3, 2 damping springs are arranged at the bottom of the front end of the screening basket (2) side by side, and 1 damping spring is arranged in the middle of the bottom of the rear end of the screening basket.

5. The polysilicon material screening device according to claim 1, wherein: the screening basket (2) is obliquely arranged on the bracket B (9), and the inclination angle is 30 degrees.

6. The polysilicon material screening device according to claim 1, wherein: the aperture of the screening hole (16) is 2-3 cm.

7. A screening device for polysilicon material according to claim 2, wherein: the inner wall of the dust remover (3), the inner wall of the screening basket (2) and the screening net (15) are all made of silicon nitride.