CN113634491B

CN113634491B - Chemical powder material multi-stage screening device

Info

Publication number: CN113634491B
Application number: CN202111197099.5A
Authority: CN
Inventors: 陈徐
Original assignee: Jiangsu Xinhanling Bioengineering Co ltd
Current assignee: Jiangsu Xinhanling Bioengineering Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2021-12-17
Anticipated expiration: 2041-10-14
Also published as: CN113634491A

Abstract

The invention relates to a chemical powder material multi-stage screening device which comprises a bottom plate, a screening cylinder, a connecting frame, a shaking part, a connecting part and a screening part, wherein the bottom plate is provided with a plurality of screening holes; screening part not only can carry out multistage vibration screening processing to chemical powder material, can also in time brush the chemical powder material of adhesion on the screening casing inner wall through the clearance unit and fall, the waste of chemical powder material has effectively been reduced, the screening cost is reduced, secondly, the material tooth of scraping that sets up on the clearance unit not only can play the effect of stirring to the chemical powder material in the screening casing in the screening process, can carry out crushing treatment to the chemical powder material of caking simultaneously again, prevent that it from blockking up the sieve mesh, simultaneously in the screening process, it can mutually support to rock part and adapting unit, it rocks to drive the chemical powder material in the screening casing, the screening efficiency of chemical powder material has effectively been improved.

Description

Chemical powder material multi-stage screening device

Technical Field

The invention relates to the field of chemical powder material screening, in particular to a chemical powder material multi-stage screening device.

Background

The material screening refers to an operation process of dividing materials with uneven granularity into various granularity levels by utilizing a screen surface with holes; chemical industry powder material need sieve its before the use and handle to obtain the chemical industry powder material of different granularity grades, so that use according to the user demand of difference.

The utility model patent No. 2016211233226 discloses a powder vibration screening device, including shell, vibrating motor and vibrating device, vibrating motor links to each other with vibrating device, and this powder vibration screening device can carry out cubic vibration screening to powder material, has effectively improved screening efficiency.

The invention patent with the patent number of 2019111931796 discloses a powder screening device, which specifically comprises a discharging hopper, a filtering shell, a powder collecting chamber and a base, wherein the powder screening device can continuously and automatically feed materials, effectively reduces the labor intensity of workers and improves the screening efficiency.

However, the above patents suffer from the following problems during the screening process: a. powdery materials are easy to adhere to the inner wall of the screening shell and cannot be scraped off or cleaned in time, so that raw materials are easily wasted, and the cost of screening the materials is increased; b. because the powdery material is easy to agglomerate, and the powdery material cannot be crushed in time in the screening process, the agglomerated material is easy to block the screen holes, and the screening efficiency is reduced.

Disclosure of Invention

The technical scheme is as follows: in order to solve the technical problem, the invention particularly provides a chemical powder material multistage screening device which comprises a bottom plate, screening cylinders, connecting frames, a shaking component, a connecting component and a screening component, wherein the connecting frames are symmetrically arranged at the front and back of the upper end of the bottom plate, the adjacent ends of the connecting frames are rotatably connected with the screening cylinders, the connecting component is arranged on the left side wall of the screening cylinder, the lower ends of the connecting components are fixedly arranged on the bottom plate, the shaking component is arranged at the lower ends of the screening cylinders, and the screening component is arranged in the screening cylinders.

Screening section of thick bamboo including screening casing, end cover, feeding case, discharge gate, play flitch and accuse material unit, wherein the close end rotation of two links around is connected with the screening casing, screening casing upper end is provided with the end cover, end cover up end bilateral symmetry is connected with the feeding case, feeding case lower extreme and screening casing internal portion communicate, screen on the casing right side wall from last to evenly having seted up the discharge gate down, the discharge gate lower extreme is connected with out the flitch, the discharge gate top is provided with accuse material unit.

The screening component comprises a reciprocating motor, a rotating shaft, a cleaning unit, a screen plate, a connecting sleeve, a connecting block, a vibrating spring and a reciprocating electric push rod, wherein the reciprocating motor is installed in the middle of the upper end face of an end cover through a motor base, an output shaft of the reciprocating motor is connected with the rotating shaft through a coupler, the rotating shaft penetrates through the end cover and is connected with the bottom of a screening shell through a bearing, the rotating shaft is connected with the end cover through the bearing, the cleaning unit is uniformly and fixedly connected with the rotating shaft from top to bottom, the screen plate is slidably connected with the rotating shaft below the cleaning unit, the screen plate is in sliding fit with the screening shell, the connecting sleeve is fixedly connected with the middle of the upper end of the screen plate and is slidably sleeved on the rotating shaft, sliding grooves are symmetrically formed in the inner side walls of the screening shell, the connecting block is slidably arranged in the sliding grooves, the connecting block is fixedly connected to the screen plate, and the vibrating spring is installed between the lower end of the connecting block and the bottom of the sliding grooves, the inboard of vibrating spring is provided with reciprocal electric putter, and reciprocal electric putter telescopic end fixed connection is on the connecting block, and reciprocal electric putter stiff end passes through the push rod pedestal mounting in the spout bottom.

According to a preferable technical scheme, the material control unit comprises a first rectangular groove, an electromagnet, an L-shaped plate, a limiting groove, a limiting plate and a first spring, wherein the first rectangular groove is formed above the discharge port, the electromagnet is mounted at the upper end of the first rectangular groove, the L-shaped plate is arranged in the first rectangular groove in a sliding mode, the lower end of the L-shaped plate extends into the discharge port, the limiting groove is formed in the bottom of the discharge port, and the limiting plate is connected in the limiting groove in a sliding mode through the first spring.

In a preferred embodiment of the present invention, an iron piece is attached to an upper end surface of the L-shaped plate, and the iron piece is used to attract the L-shaped plate by the electromagnet after being energized.

As a preferred technical scheme of the invention, the shaking component comprises a supporting seat, a forward and reverse rotating motor, a driving gear and a tooth-shaped tooth section, wherein the tooth-shaped tooth section is fixedly connected to the lower end of the screening shell, the driving gear is meshed below the tooth-shaped tooth section, the driving gear is mounted on an output shaft of the forward and reverse rotating motor in a key connection mode, the forward and reverse rotating motor is mounted on the supporting seat through a motor base, and the lower end of the supporting seat is fixedly connected to the bottom plate.

As a preferred technical scheme of the invention, the connecting part comprises a vertical plate, a mounting groove and a telescopic rod, wherein the vertical plate is fixedly connected to the position, close to the left end, of the upper end surface of the bottom plate, the mounting groove is uniformly formed in the middle of the right side wall of the vertical plate from top to bottom, the mounting groove is rotatably connected with one end of the telescopic rod through a pin shaft, and the other end of the telescopic rod is rotatably connected with the left side wall of the screening shell through a pin shaft.

As a preferable technical scheme, the sieve plates are uniformly provided with sieve holes, the diameters of the sieve holes on the upper sieve plate are larger than those of the sieve holes on the lower sieve plate, chemical powder materials with larger particle diameters can be left at the upper end of the upper sieve plate, chemical powder materials with middle particle diameters can be left at the upper end of the lower sieve plate, and chemical powder materials with smaller particle diameters can be left at the bottom of the sieving shell, so that the aim of multi-stage sieving of the chemical powder materials is fulfilled.

According to a preferred technical scheme, the cleaning unit comprises a rectangular block, a rotating disc, a connecting rod, a brush seat, a brush head, a vertical plate and scraping teeth, wherein the rectangular block is uniformly and fixedly connected to a rotating shaft from top to bottom, the lower end of the rectangular block is connected with the rotating disc in a sliding mode, a spring is connected between the rotating disc and the rectangular block, the rotating disc is sleeved on the rotating shaft, the inner wall of the rotating disc is not in contact with the rotating shaft, the connecting rod is uniformly and circumferentially arranged on the outer side wall of the rotating disc, the brush seat is fixedly connected to one end, far away from the rotating disc, of the connecting rod, the brush head is mounted on the brush seat, one end, far away from the brush seat, of the brush head is in contact with the inner wall of the screening shell, the vertical plates are fixedly connected to the lower ends of the other connecting rods except for the connecting rod located at the lowest position, and the scraping teeth are mounted at the lower ends of the vertical plates.

As a preferred technical scheme, the vertical plate is uniformly provided with the material leaking holes, the material leaking holes can reduce the resistance of the vertical plate and can drive chemical powder materials in the screening shell to move, and therefore the screening efficiency of the chemical powder materials is improved.

The invention has the following beneficial effects: 1. the screening component can not only carry out multistage vibration screening treatment on chemical powder materials, but also can timely brush off the chemical powder materials adhered to the inner wall of the screening shell through the cleaning unit, thereby effectively reducing the waste of the chemical powder materials and reducing the screening cost.

2. The scraping teeth arranged on the cleaning unit can rotate in the screening process, so that the chemical powder materials in the screening shell can be stirred, the agglomerated chemical powder materials can be crushed, the screening holes are prevented from being blocked, and the screening efficiency of the chemical powder materials is improved.

3. The shaking component and the connecting component can be matched with each other in the screening process, so that chemical powder materials in the screening shell are driven to shake, the screening efficiency is accelerated, meanwhile, the shaking component can enable the screening shell to incline after screening is finished, and the convenience of the blanking process is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partially sectional perspective view of the present invention.

Fig. 3 is a schematic structural diagram of a screening shell, a discharge hole, a discharge plate and a material control unit in the invention.

Fig. 4 is a partially enlarged view of fig. 3 a according to the present invention.

Fig. 5 is a solid view of the three-dimensional structure of the rotating shaft and the cleaning unit in the invention.

Fig. 6 is a partially enlarged view of the position B of fig. 2 according to the present invention.

In the figure: 1. a base plate; 2. a screening drum; 21. a screening housing; 22. an end cap; 23. a feeding box; 24. a discharge port; 25. a discharge plate; 26. a material control unit; 261. a first rectangular groove 2; 262. an electromagnet; 263. an L-shaped plate; 264. a limiting groove; 265. a limiting plate; 266. a first spring; 3. a connecting frame; 4. a shaking member; 41. a supporting seat; 42. a positive and negative rotation motor; 43. a driving gear; 44. a tooth-shaped tooth segment; 5. a connecting member; 51. a vertical plate; 52. mounting grooves; 53. a telescopic rod; 6. a screening component; 61. a reciprocating motor; 62. a rotating shaft; 63. a cleaning unit; 631. a rectangular block; 632. rotating the disc; 633. a connecting rod; 634. a brush holder; 635. a bristle head; 636. a vertical plate; 637. scraping teeth; 64. a sieve plate; 65. a connecting sleeve; 66. connecting blocks; 67. a vibration spring; 68. reciprocating electric push rod.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

Referring to fig. 1 and 2, a chemical powder material multi-stage screening device, include bottom plate 1, screening section of thick bamboo 2, link 3, rock part 4, adapting unit 5 and screening part 6, bottom plate 1 upper end around the symmetry install link 3, link 3's close end rotates and is connected with screening section of thick bamboo 2, screening section of thick bamboo 2 left side wall mounting has adapting unit 5, adapting unit 5 lower extreme is fixed to be set up on bottom plate 1, screening section of thick bamboo 2 lower extreme is installed and is rocked part 4, screening section of thick bamboo 2 inside is provided with screening part 6.

With continuing reference to fig. 1 and fig. 2, the screening cylinder 2 includes a screening housing 21, an end cover 22, a feeding box 23, a discharging port 24, a discharging plate 25 and a material controlling unit 26, wherein the adjacent ends of the front and rear connecting frames 3 are rotatably connected with the screening housing 21, the end cover 22 is arranged at the upper end of the screening housing 21, the feeding box 23 is symmetrically connected to the left and right of the upper end surface of the end cover 22, the lower end of the feeding box 23 is communicated with the inside of the screening housing 21, the discharging port 24 is uniformly arranged on the right side wall of the screening housing 21 from top to bottom, the lower end of the discharging port 24 is connected with the discharging plate 25, and the material controlling unit 26 is arranged above the discharging port 24; during specific work, the discharge port 24 is closed through the manual operation material control unit 26, and then the chemical powder materials needing to be sieved are added into the sieving shell 21 from the feeding box 23, so that the chemical powder materials in the sieving shell 21 are sieved through the sieving component 6.

Referring to fig. 3 and 4, the material control unit 26 includes a first rectangular groove 261, an electromagnet 262, an L-shaped plate 263, a limiting groove 264, a limiting plate 265 and a first spring 266, wherein the first rectangular groove 261 is disposed above the discharge port 24, the electromagnet 262 is mounted at the upper end of the first rectangular groove 261, the L-shaped plate 263 is slidably disposed in the first rectangular groove 261, an iron sheet is mounted on the upper end surface of the L-shaped plate 263, the iron sheet has the function that the electromagnet 262 after being powered on can adsorb the L-shaped plate 263, the lower end of the L-shaped plate 263 extends into the discharge port 24, the limiting groove 264 is disposed at the bottom of the discharge port 24, and the limiting plate 265 is slidably connected in the limiting groove 264 through the first spring 266; during initial state, electro-magnet 262 lower extreme and L shaped plate 263 up end are the actuation state, cut off the power of electro-magnet 262 before the material loading, electro-magnet 262 loses magnetism, under the effect of L shaped plate 263 self gravity, L shaped plate 263 can downstream to the spacing groove 264 in, spring 266 is in compression state this moment, later alright sieve the chemical powder material of sieving in the casing 21 through screening part 6 and handle, after the screening, stir L shaped plate 263 upwards through the manual work, simultaneously with electro-magnet 262 circular telegram, L shaped plate 263 can adsorb at electro-magnet 262 lower extreme this moment, discharge gate 24 is opened, so that discharge through the chemical powder material that goes out flitch 25 will sieve different particle diameters in the casing 21.

Referring to fig. 1 and 2, the shaking part 4 includes a supporting seat 41, a forward and backward rotation motor 42, a driving gear 43 and a tooth-shaped tooth section 44, wherein the lower end of the screening housing 21 is fixedly connected with the tooth-shaped tooth section 44, the driving gear 43 is engaged below the tooth-shaped tooth section 44, the driving gear 43 is mounted on an output shaft of the forward and backward rotation motor 42 in a key connection manner, the forward and backward rotation motor 42 is mounted on the supporting seat 41 through a motor base, and the lower end of the supporting seat 41 is fixedly connected to the bottom plate 1; during specific operation, after the chemical industry powder material that will need to sieve adds screening casing 21 from feed box 23 as the manual work, start positive reverse motor 42, drive driving gear 43 through positive reverse motor 42 and carry out reciprocating rotation, thereby drive tooth shape tooth section 44 reciprocating rotation, tooth shape tooth section 44 can drive the chemical industry powder material in the screening casing 21 and rock rotating the in-process, thereby the efficiency of chemical industry powder material screening has been improved, when the unloading, accessible control positive reverse motor 42 makes screening casing 21 to the right side slope, thereby be convenient for discharge the chemical industry powder material in the casing 21 that will sieve.

Continuing to refer to fig. 1, the connecting part 5 includes a vertical plate 51, a mounting groove 52 and a telescopic rod 53, wherein the vertical plate 51 is fixedly connected to the position of the upper end surface of the bottom plate 1 near the left end, the mounting groove 52 is uniformly formed in the middle of the right side wall of the vertical plate 51 from top to bottom, the mounting groove 52 is rotatably connected with one end of the telescopic rod 53 through a pin shaft, and the other end of the telescopic rod 53 is rotatably connected with the left side wall of the screening housing 21 through a pin shaft; during specific work, in the process that the screening shell 21 shakes left and right, the telescopic rod 53 and the vertical plate 51 can ensure the stability of the screening shell 21.

Referring to fig. 2 and 6, the sieving component 6 includes a reciprocating motor 61, a rotating shaft 62, a cleaning unit 63, a sieve plate 64, a connecting sleeve 65, a connecting block 66, a vibrating spring 67 and a reciprocating electric push rod 68, wherein the reciprocating motor 61 is installed in the middle of the upper end surface of the end cover 22 through a motor base, the output shaft of the reciprocating motor 61 is connected with the rotating shaft 62 through a coupling, the rotating shaft 62 penetrates through the end cover 22 and is connected with the bottom of the sieving shell 21 through a bearing, the rotating shaft 62 is connected with the end cover 22 through a bearing, the cleaning unit 63 is uniformly and fixedly connected on the rotating shaft 62 from top to bottom, the sieve plate 64 is connected on the rotating shaft 62 below the cleaning unit 63 in a sliding manner, the sieve plate 64 and the rotating shaft 62 can rotate relatively, the sieve plate 64 and the sieving shell 21 are in a sliding manner, sieve holes are uniformly formed on the sieve plate 64, and the diameter of the sieve holes on the sieve plate 64 above is larger than that on the sieve plate 64 below, in the screening process, the chemical powder material with larger particle diameter can be left at the upper end of the screen plate 64 above, the chemical powder material with middle particle diameter can be left at the upper end of the screen plate 64 below, the chemical powder material with smaller particle diameter can be left at the bottom of the screening shell 21, thereby achieving the purpose of multi-stage screening of the chemical powder material, the middle part of the upper end of the screen plate 64 is fixedly connected with a connecting sleeve 65, the connecting sleeve 65 is slidably sleeved on the rotating shaft 62, the connecting sleeve 65 is arranged to prevent the powdered chemical material from entering a gap at the joint of the rotating shaft 62 and the screen plate 64 to influence the rotation of the rotating shaft 62, sliding grooves are symmetrically arranged on the inner side walls of the screening shell 21 at the front side and the rear side of the screen plate 64, connecting blocks 66 are slidably arranged in the sliding grooves, the connecting blocks 66 are fixedly connected on the screen plate 64, and a vibrating spring 67 is arranged between the lower end of the connecting blocks 66 and the bottom of the sliding grooves, a reciprocating electric push rod 68 is arranged on the inner side of the vibration spring 67, the telescopic end of the reciprocating electric push rod 68 is fixedly connected to the connecting block 66, and the fixed end of the reciprocating electric push rod 68 is arranged at the bottom of the sliding chute through a push rod base; during operation, start reciprocating motor 61, drive pivot 62 reciprocating rotation through reciprocating motor 61, thereby drive cleaning unit 63 and carry out reciprocating rotation, cleaning unit 63 can stir the chemical powder material in screening casing 21 at the rotation in-process, start reciprocal electric putter 68 simultaneously, drive connecting block 66 through reciprocal electric putter 68 and carry out up-and-down reciprocating motion, thereby drive sieve 64 vibration, be favorable to improving the screening efficiency of chemical powder material, the screening in-process, cleaning unit 63 can also brush the chemical powder material of adhesion on the screening casing 21 inner wall down, the extravagant phenomenon has been avoided.

Referring to fig. 5, the cleaning unit 63 includes a rectangular block 631, a rotating disc 632, a connecting rod 633, a brush holder 634 and a brush head 635, wherein the rectangular block 631 is uniformly and fixedly connected to the rotating shaft 62 from top to bottom, the lower end of the rectangular block 631 is slidably connected to the rotating disc 632, a spring is connected between the rotating disc 632 and the rectangular block 631, the rotating disc 632 is sleeved on the rotating shaft 62, the inner wall of the rotating disc 632 is not in contact with the rotating shaft 62, the connecting rod 633 is uniformly arranged on the outer side wall of the rotating disc 632 in the circumferential direction, one end of the connecting rod 633 far away from the rotating disc 632 is fixedly connected to the brush holder 634, the brush head 635 is mounted on the brush holder 634, one end of the brush head 635 far away from the brush holder 634 is in contact with the inner wall of the sieving housing 21, except for the connecting rod 633 at the bottom, a vertical plate 636 is fixedly connected to the lower end of the other connecting rods 633, the vertical plate 636 is uniformly provided with material leaking holes, the material holes 634 can reduce the resistance when the vertical plate 636 rotates, meanwhile, the chemical powder materials in the screening shell 21 can be driven to move, so that the screening efficiency of the chemical powder materials is improved, and the scraping teeth 637 are arranged at the lower ends of the vertical plates 636; during specific work, drive pivot 62 reciprocating rotation through reciprocating motor 61, thereby it rotates to drive rectangular block 631, rectangular block 631 can drive rotation disc 632 and rotate rotating at the rotation in-process, thereby it rotates to drive connecting rod 633, it rotates to drive brush seat 634 and brush head 635 through connecting rod 633, brush the chemical powder material on the inside wall of screening casing 21, connecting rod 633 can drive scraping tooth 637 rotation of riser 636 lower extreme simultaneously, it can play the effect of stirring to the chemical powder material in screening casing 21 when rotating to scrape tooth 637, can carry out crushing treatment to the chemical powder material of caking simultaneously again, prevent that it from blockking up the sieve mesh, the screening efficiency of chemical powder material has been improved, because it is the sliding connection mode to rotate between disc 632 and the rectangular block 631, and be connected with the spring between the two, therefore the irregular falling of chemical powder material is rotating disc 632, When connecting rod 633, brush seat 634 or brush head 635 go up, rotate disc 632 and just can carry out irregular up-and-down motion to constantly change brush head 635, riser 636 and scrape the height of material tooth 637, enlarge clearance scope and broken scope, further improved clearance effect and crushing effect.

The method comprises the following steps: the first step is as follows: before the material loading, with electro-magnet 262 outage, electro-magnet 262 loses magnetism, under the effect of L shaped plate 263 self gravity, L shaped plate 263 can downstream to spacing groove 264 in, the chemical industry powder material that will need carry out the screening again through the manual work adds from feed box 23 in the screening casing 21.

The second step is that: starting the reciprocating motor 61, driving the rotating shaft 62 to rotate in a reciprocating manner by the reciprocating motor 61, thereby driving the rectangular block 631 to rotate, the rectangular block 631 can drive the rotating disc 632 to rotate in the rotating process, thereby driving the connecting rod 633 to rotate, driving the brush seat 634 and the brush head 635 to rotate by the connecting rod 633, brushing off the chemical powder material on the inner side wall of the screening shell 21, avoiding the situation that the chemical powder material is adhered to the inner side wall of the screening shell 21 to cause waste, meanwhile, the connecting rod 633 can drive the scraping teeth 637 at the lower end of the vertical plate 636 to rotate, the scraping teeth 637 can play a role in stirring the chemical powder material in the screening shell 21 when rotating, accelerating the screening of the chemical powder material, simultaneously starting the reciprocating electric push rod 68, driving the connecting block 66 to do up-and-down reciprocating movement by the reciprocating electric push rod 68, thereby driving the screen plate 64 to vibrate, thereby not only preventing the screen holes on the screen plate 64 from being blocked, meanwhile, the screening efficiency of chemical powder materials is improved.

The third step: in-process that above-mentioned step two goes on, start positive reverse motor 42, drive driving gear 43 through positive reverse motor 42 and carry out reciprocating rotation, thereby drive tooth shape tooth section 44 reciprocating rotation, tooth shape tooth section 44 can drive the chemical powder material in screening casing 21 and rock rotating the in-process, in order to improve screening efficiency, guarantee screening casing 21 pivoted more stable through telescopic link 53 and riser 51, after the screening process, the sieve 64 upper end of top can be stayed to the great chemical powder material of particle diameter, the sieve 64 upper end of below can be stayed to the chemical powder material between two parties of particle diameter, the bottom of screening casing 21 can be stayed to the less chemical powder material of particle diameter.

The fourth step: the motor 42 is just reversing in manual control for the upper end of screening casing 21 is to the right side slope, and motor 42 stall is just reversing this moment, and electro-magnet 262 resumes the circular telegram, and the manual work is stirred L shaped plate 263 and is made L shaped plate 263 upper end adsorb on electro-magnet 262, and discharge gate 24 is opened this moment, thereby will screen the chemical industry powder material discharge of different particle diameters in the casing 21 in proper order through play flitch 25.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present invention; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a chemical industry powder material multi-stage screening device, includes bottom plate (1), screening section of thick bamboo (2), link (3), rocks part (4), adapting unit (5) and screening part (6), its characterized in that: bottom plate (1) upper end around the symmetry install link (3), the close end rotation of link (3) is connected with screening section of thick bamboo (2), screening section of thick bamboo (2) left side wall mounting has adapting unit (5), adapting unit (5) lower extreme is fixed to be set up on bottom plate (1), screening section of thick bamboo (2) lower extreme is installed and is rocked part (4), screening section of thick bamboo (2) inside screening part (6) that are provided with, wherein:

the screening cylinder (2) comprises a screening shell (21), an end cover (22), a feeding box (23), a discharging hole (24), a discharging plate (25) and a material control unit (26), wherein the screening shell (21) is rotatably connected to the close ends of the front connecting frame and the rear connecting frame (3), the end cover (22) is arranged at the upper end of the screening shell (21), the feeding box (23) is symmetrically connected to the left and right of the upper end surface of the end cover (22), the lower end of the feeding box (23) is communicated with the inside of the screening shell (21), the discharging hole (24) is uniformly formed in the right side wall of the screening shell (21) from top to bottom, the discharging plate (25) is connected to the lower end of the discharging hole (24), and the material control unit (26) is arranged above the discharging hole (24);

the screening component (6) comprises a reciprocating motor (61), a rotating shaft (62), a cleaning unit (63), a screening plate (64), a connecting sleeve (65), a connecting block (66), a vibration spring (67) and a reciprocating electric push rod (68), wherein the reciprocating motor (61) is installed in the middle of the upper end face of an end cover (22) through a motor base, an output shaft of the reciprocating motor (61) is connected with the rotating shaft (62) through a coupler, the rotating shaft (62) penetrates through the end cover (22) and is connected with the bottom of a screening shell (21) through a bearing, the rotating shaft (62) is connected with the end cover (22) through the bearing, the cleaning unit (63) is uniformly and fixedly connected on the rotating shaft (62) from top to bottom, the screening plate (64) is slidably connected on the rotating shaft (62) below the cleaning unit (63), the screening plate (64) is slidably matched with the screening shell (21), the middle part of the upper end of the screening plate (64) is fixedly connected with the connecting sleeve (65), the connecting sleeve (65) is sleeved on the rotating shaft (62) in a sliding manner, sliding grooves are symmetrically formed in the inner side walls of the screening shell (21) on the front side and the rear side of the screen plate (64), a connecting block (66) is arranged in the sliding grooves in a sliding manner, the connecting block (66) is fixedly connected to the screen plate (64), a vibration spring (67) is arranged between the lower end of the connecting block (66) and the bottom of the sliding grooves, a reciprocating electric push rod (68) is arranged on the inner side of the vibration spring (67), the telescopic end of the reciprocating electric push rod (68) is fixedly connected to the connecting block (66), and the fixed end of the reciprocating electric push rod (68) is installed at the bottom of the sliding grooves through a push rod base;

the cleaning unit (63) comprises a rectangular block (631), a rotating disc (632), a connecting rod (633), a brush seat (634), a brush head (635), a vertical plate (636) and scraping teeth (637), wherein the rectangular block (631) is uniformly and fixedly connected to the rotating shaft (62) from top to bottom, the lower end of the rectangular block (631) is connected with the rotating disc (632) in a sliding manner, a spring is connected between the rotating disc (632) and the rectangular block (631), the rotating disc (632) is sleeved on the rotating shaft (62) and the inner wall of the rotating disc (632) is not contacted with the rotating shaft (62), the connecting rod (633) is uniformly arranged on the outer side wall of the rotating disc (632) in the circumferential direction, one end, far away from the rotating disc (632), of the connecting rod (633) is fixedly connected with the brush seat (634), the brush head (635) is installed on the brush seat (634), one end, far away from the brush head (635) is contacted with the inner wall of the screening shell (21), except the connecting rod (633) positioned at the lowest part, the lower ends of the other connecting rods (633) are fixedly connected with vertical plates (636), and the lower ends of the vertical plates (636) are provided with scraping teeth (637);

the shaking part (4) comprises a supporting seat (41), a forward and reverse rotating motor (42), a driving gear (43) and a tooth-shaped tooth section (44), wherein the tooth-shaped tooth section (44) is fixedly connected to the lower end of the screening shell (21), the driving gear (43) is meshed below the tooth-shaped tooth section (44), the driving gear (43) is installed on an output shaft of the forward and reverse rotating motor (42) in a key connection mode, the forward and reverse rotating motor (42) is installed on the supporting seat (41) through a motor base, and the lower end of the supporting seat (41) is fixedly connected to the bottom plate (1);

the connecting part (5) comprises a vertical plate (51), a mounting groove (52) and a telescopic rod (53), wherein the position, close to the left end, of the upper end surface of the bottom plate (1) is fixedly connected with the vertical plate (51), the mounting groove (52) is uniformly formed in the middle of the right side wall of the vertical plate (51) from top to bottom, the mounting groove (52) is rotatably connected with one end of the telescopic rod (53) through a pin shaft, and the other end of the telescopic rod (53) is rotatably connected with the left side wall of the screening shell (21) through a pin shaft;

the vertical plate (636) is uniformly provided with material leaking holes.

2. The chemical powder material multi-stage screening device of claim 1, wherein: accuse material unit (26) including a rectangle recess (261), electro-magnet (262), L shaped plate (263), spacing groove (264), limiting plate (265) and spring (266), wherein discharge gate (24) top is provided with a rectangle recess (261), electro-magnet (262) are installed to a rectangle recess (261) upper end, it is provided with L shaped plate (263) to slide in rectangle recess (261), inside L shaped plate (263) lower extreme extended to discharge gate (24), spacing groove (264) have been seted up to discharge gate (24) bottom, there is limiting plate (265) through spring (266) sliding connection in spacing groove (264).

3. The chemical powder material multi-stage screening device of claim 2, wherein: the upper end surface of the L-shaped plate (263) is provided with an iron sheet.

4. The chemical powder material multi-stage screening device of claim 1, wherein: sieve holes are uniformly formed in the sieve plates (64), and the diameter of the sieve holes in the sieve plates (64) above is larger than that of the sieve holes in the sieve plates (64) below.