CN112221919B

CN112221919B - Perlite particle screening device

Info

Publication number: CN112221919B
Application number: CN202011075594.4A
Authority: CN
Inventors: 董爽
Original assignee: Jiangsu Shanbao Group Co Ltd
Current assignee: Jiangsu Shanbao Group Co Ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-12-21
Anticipated expiration: 2040-10-10
Also published as: CN112221919A

Abstract

The invention relates to a perlite particle screening device which comprises a screening box, wherein a motor is fixedly connected to the outer side wall of the lower end of the screening box, the bottom in the screening box is rotatably connected with a rotating disc, a plurality of limiting rods are fixedly connected to the rotating disc, two rotating rods are rotatably connected to the inner side wall of the screening box, a stop rod is fixedly connected between the two rotating rods, a rotating disc is fixedly connected to the limiting rods, the rotating disc comprises a first rotating disc, a second rotating disc and a third rotating disc, a fixed disc is rotatably connected to the outer side of the first rotating disc, a second filter screen is fixedly connected to the outer side of the second rotating disc, a first filter screen is fixedly connected to the outer side of the third rotating disc, and a plurality of discharge ports are fixedly communicated with the outer side of the screening box. The invention effectively solves the problems that the screen cloth with different meshes needs to be used for screening for multiple times when the screen cloth is screened by a vibration screening machine and is inconvenient to move and is used for screening for multiple stages, the appearance of the perlite is irregular, and the screen cloth is easy to block, and greatly improves the process of grading and screening the perlite particles.

Description

Perlite particle screening device

Technical Field

The invention relates to the technical field of perlite technology, in particular to a perlite particle screening device.

Background

The perlite industry is a new energy-saving material industry, raw perlite ore is dried and preheated, and then is roasted and expanded to form a novel light and multifunctional material, and the novel light and multifunctional perlite material has the characteristics of light apparent density, low heat conductivity coefficient, good chemical stability, wide use temperature range, small moisture absorption capacity, no toxicity, no odor, fire prevention, sound absorption and the like, and is widely applied to various industrial departments. The pearlite needs to sieve it before the drying preheats and grades, divides out the not granule grade of equidimension rank, and current pearlite granule screening plant utilizes shock dynamo to make screening plant take place to shake and accomplish the screening of pearlite, and this kind of vibrations screening plant bottom must be firmly connected with ground, and it is inconvenient to install during the use, and inconvenient removal after the installation is accomplished. The screen cloth that needs different mesh number when current perlite screening plant screens the perlite in grades needs to carry out the multistage screening many times, and screening classification efficiency is low, and because of the perlite appearance is irregular, blocks up the screen cloth easily when the screening, influences the screening process.

In conclusion, the existing perlite particle screening device has the following defects:

1. utilize vibrations screening machine to sieve, the installation is comparatively complicated and the installation is inconvenient after finishing to remove.

2. When the perlite is subjected to multi-stage screening, the perlite cannot be screened at one time, and screening with screens with different meshes is required for multiple times, so that the screening efficiency is low.

3. Because the shape of the perlite is irregular, the screen is easy to block in the screening process, and the screening process is influenced.

Therefore, the invention provides a novel perlite particle screening device to solve the problem.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the perlite particle screening device which effectively solves the problems that the existing device utilizes a vibration screening machine to screen, the installation process is complex, the device is inconvenient to move after being installed, when the perlite is screened in multiple stages, the device cannot be completed at one time, screening is carried out by using screens with different meshes for multiple times, the screening efficiency is low, and the screening process is influenced because the shape of the perlite is irregular and the screens are easy to block in the screening process.

The invention comprises a screening box, the top of the screening box is fixedly communicated with a feed inlet, the outer side wall of the upper end of the screening box is fixedly connected with a drying fan, the screening box is connected with a stirring impeller in a rotating way, the lower end of the stirring impeller is provided with a blanking port, the outer side wall of the lower end of the screening box is fixedly connected with a motor, the bottom in the screening box is rotatably connected with a rotating disc, the rotating disc is fixedly connected with a plurality of limiting rods, the inner side wall of the screening box is rotatably connected with two rotating rods, a stop lever is fixedly connected between the two rotating rods, the two rotating rods are symmetrical about the midpoint of the stop lever, the stop lever passes through the limiting rods to be in contact connection with the limiting rods, the limiting rods are fixedly connected with rotating discs, and the rotating discs comprise a first rotating disc, a second rotating disc and a third rotating disc, the first carousel outside rotate and to link there is fixed disc, the second carousel be located the top of first carousel, the outside fixedly connected with second filter screen of second carousel, the third carousel be located the top of second carousel, the first filter screen of third carousel outside fixedly connected with, the fixed intercommunication in outside of screening case have a plurality of discharge gates.

Preferably, the screening case on open and to have a plurality of spouts, first filter screen and a plurality of connection platforms of second filter screen outside fixedly connected with, the connection platform pass the spout be in the spout slide, the connection platform be located the outside lower extreme fixedly connected with of screening case rotate the rack, the screening case on rotate and be connected with a plurality of connecting rods, the connecting rod pass the screening case, the connecting rod be located the screening incasement one end fixedly connected with striking strip, connecting rod other end fixedly connected with rotating gear, rotating gear with rotation rack intermeshing.

Preferably, the upper end of the rotary table is rotatably connected with a wheel sleeve, the outer side of the wheel sleeve is fixedly connected with a plurality of blades, the blades are circular arc-shaped blades, one end of each blade is attached to the inner wall of the screening box, ratchets are fixedly connected to the inner ring of the wheel sleeve, pawls matched with the ratchets are rotatably connected to the rotary table, spring pieces are fixedly connected to the rotary table, and the spring pieces are attached to the pawls.

Preferably, a plurality of dome covers are fixedly connected to the limiting rod, and the lower ends of the dome covers are rotatably connected with the wheel sleeve.

Preferably, the top of the screening box is provided with an air vent.

Preferably, the top of the screening box 1 is provided with an air vent 28.

The invention aims at the problems that the existing perlite particle device utilizes a vibration screening machine to screen, the installation process is complex, the device is inconvenient to move after being installed, the multi-stage screening of perlite cannot be completed at one time, screening with screens with different meshes is required for multiple times, the screening efficiency is low, and the screening process is influenced because the appearance of perlite is irregular and the screens are easy to block in the screening process, the following improvements are made:

1. the screen mesh is subjected to reciprocating rotation screening by matching of the limiting rod and the stop lever, so that the vibration of the device is avoided, the device does not need to be fixed, and the screening device can be moved at any time.

2. A plurality of screens with different meshes are arranged in the screening box, so that the multi-stage screening of the perlite particles can be completed at one time, the screening efficiency is improved,

3. set up a plurality of arc blades on the screen cloth, arc blade rotates along with the rotation of screen cloth, and the perlite granule that promotes the screening gets into the discharge gate, has improved discharging efficiency.

4. Set up the striking piece in the below of screen cloth, the screen cloth is constantly beaten along with the rotation of screen cloth to the striking piece, prevents to have the perlite granule to block up the screen hole.

The invention effectively solves the problems that the existing perlite particle screening device is screened by a vibrating screening machine, the installation process is complicated, the device is inconvenient to move after being installed, the multi-stage screening of perlite cannot be completed at one time, screening is carried out by using screens with different meshes for multiple times, the screening efficiency is low, and the screens are easy to block in the screening process due to irregular appearance of perlite, thereby facilitating the use of the screening device and greatly improving the process of grading and screening the perlite particles.

Drawings

FIG. 1 is a schematic overall appearance of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is an elevational, cross-sectional view of the present invention;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a top cross-sectional view of the present invention;

FIG. 6 is an enlarged view at C of FIG. 5;

FIG. 7 is a schematic view of the wheel cover structure of the present invention;

FIG. 8 is a schematic illustration of a screening arrangement of the present invention;

FIG. 9 is a schematic view of the impact strip of the present invention;

FIG. 10 is a schematic view of a stirring impeller of the present invention;

description of reference numerals: 1-screening box; 2-a feed inlet; 3-drying the fan; 4-rotating the disc; 5-a limiting rod; 6-rotating the rod; 7-a stop lever; 8-a discharge hole; 9-a first carousel; 10-a second turntable; 11-a third turntable; 12-a fixed disc; 13-a second screen; 14-a first screen; 15-stirring impeller; 16-wheel cover; 17-a blade; 18-ratchet; 19-a pawl; 20-spring leaf; 21-a connection station; 22-rotating the rack; 23-a chute; 24-a connecting rod; 25-a rotating gear; 26-a strike bar; 27-a dome cover; 28-blanking port; 29-a motor; 30-vent.

Detailed Description

The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 10. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.

In the description of the present invention, it is to be understood that the terms "upper", "middle", "outer", "inner", and the like, indicate orientations or positional relationships, are used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Exemplary embodiments of the present invention will be described below with reference to fig. 1 to 10.

The first embodiment of the invention relates to a perlite particle screening device, which comprises a screening box 1 and is characterized in that the screening box 1 is a cylindrical box body, the lower end of the screening box 1 can be connected with a universal wheel with a brake, so that the screening box 1 can be conveniently moved, the top of the screening box 1 is fixedly communicated with a feed inlet 2, perlite particles needing to be screened in a grading way enter the screening box 1 through the feed inlet 2, the perlite particle screening device can be a large-scale screening device for large-scale production, the feed inlet 2 can be communicated with a conveying belt, the perlite particles are conveyed into the feed inlet 2 through the conveying belt, the preferred perlite particle screening device can be a small-scale screening device for small-scale detection products, small-scale perlite particles can be manually poured into the feed inlet 2, a drying fan 3 is fixedly connected to the outer side wall of the upper end of the screening box 1, the drying fan 3 is externally connected with a power supply, and hot air can be blown into the screening box 1 by the drying fan 3, the perlite particles entering the screening box 1 are dried, so that the water on the surfaces of the perlite particles is evaporated, and the perlite particles can be directly roasted after screening, the stirring impeller 15 is rotationally connected in the screening box 1, the stirring impeller 15 is a spiral blade, the perlite particles entering the screening box 1 are fully stirred and scattered by the stirring impeller 15, the influence of conglobate perlite particles on subsequent screening is prevented, a gap is formed between the stirring impeller 15 and the screening box 1, the stirring impeller 15 cannot rub against the inner wall of the screening box 1 when rotating, a large number of perlite particles are prevented from falling through the gap, a blanking port 28 is formed at the lower end of the stirring impeller 15, the stirred perlite particles fall through the blanking port 28 for subsequent screening, a motor 29 is fixedly connected to the outer side wall of the lower end of the screening box 1, the motor 29 is externally connected with a power supply, and the motor 29 drives the stirring impeller 15 to rotate through a turbine worm mechanism, the output shaft of the motor 29 is connected with a gear box with double output shafts, the rotating shaft of a worm rod is connected with one output shaft of the gear box, the worm wheel is connected with the rotating shaft at the lower end of the stirring impeller 15, the bottom in the screening box 1 is rotatably connected with a rotating disc 4, the upper surface of the rotating disc 4 is fixedly connected with a plurality of limiting rods 5, the limiting rods 5 are cylindrical rods, four limiting rods 5 are uniformly distributed on the upper surface of the rotating disc 4, the inner side wall of the screening box 1 is rotatably connected with two rotating rods 6, one end of each of the two rotating rods 6 is rotatably connected with the inner wall of the screening box 1, the rotating shaft of one of the two rotating rods 6 is connected with the other output shaft of the gear box of the motor 29, one end of each of the two rotating rods 6, far away from the rotating shaft, extends out towards the inside of the screening box 1 at a certain angle, a baffle rod 7 is fixedly connected between the two rotating rods 6, and the baffle rod 7 is fixedly connected with one end, far away from the rotating shaft of the two rotating rods 6, the two rotating rods 6 are symmetrical about the middle point of the stop rod 7, so that the stop rod 7 passes through the middle of the limiting rods 5 in an inclined state and is in contact connection with the limiting rods 5, when the lower end of the rotating rod 6 rotates, the stop rod 7 is driven to move between the limiting rods 5, the stop rod 7 can be continuously in contact with the four limiting rods 5, so that the limiting rods 5 and the rotating disc 4 are driven to rotate in a reciprocating manner, the limiting rods 5 are fixedly connected with a rotating disc, the limiting rods 5 pass through the rotating disc, the rotating disc and the screening box 1 are coaxial, the rotating disc comprises a first rotating disc 9, a second rotating disc 10 and a third rotating disc 11, the outer side of the first rotating disc 9 is coaxially and rotatably connected with a disc 12, the other side of the fixed disc 12 is fixedly connected with the inner wall of the screening box 1, the second rotating disc 10 is positioned above the first rotating disc 9, the outer side of the second rotating disc 10 is coaxially and fixedly connected with a second filter screen 13, and the other side of the second filter screen 13 is rotatably connected with the inner wall of the screening box 1, when the limiting rod 5 drives the second rotary disc 10 to rotate in a reciprocating manner, the second filter screen 13 moves along with the second rotary disc 10, so that perlite particles falling on the second filter screen 13 are screened, the perlite particles with the diameter smaller than the diameter of the meshes of the second filter screen 13 fall down, the third rotary disc 11 is positioned above the second rotary disc 10, the third rotary disc 11 is positioned below the stirring impeller 15, the first filter screen 14 is coaxially and fixedly connected with the outer side of the third rotary disc 11, the outer side of the first filter screen 14 is rotatably connected with the inner wall of the screening box 1, when the limiting rod 5 drives the third rotary disc 11 to rotate in a reciprocating manner, the first filter screen 14 moves along with the third rotary disc 11, so that the perlite particles falling on the first filter screen 14 are screened, the perlite particles with the diameter smaller than the meshes of the first filter screen 14 fall down, and the mesh number of the first filter screen 14 is smaller than that of the second filter screen 13, consequently first filter screen 14 and second filter screen 13 cooperate and to accomplish the multistage screening to the pearlite granule, the fixed intercommunication in the outside of screening case 1 has a plurality of discharge gates 8, discharge gate 8 has threely, set up respectively at first filter screen 14, second filter screen 13 and fixed disc 12 position department, discharge gate 8 and the fixed intercommunication department of screening case 1 and first filter screen 14, the upper surface parallel and level of second filter screen 13 and fixed disc 12, the pearlite granule that the grading was sieved out is collected through three discharge gate 8 respectively, discharge gate 8 slope is downward, the ejection of compact of the pearlite granule of being convenient for sieve out, foretell motor 29's power and drying fan 3's power can be integrated on same power.

When the device is used, firstly, the power supply of the drying fan 3 and the motor 29 is switched on, the motor 29 drives the rotating rod 6 and the stirring impeller 15 to rotate, the rotating rod 6 drives the first filter screen 14 and the second filter screen 13 to rotate in a reciprocating manner through the stop rod 7 and the limiting rod 5, the perlite particles to be classified and screened are poured into the screening box 1 through the feeding port 2, the perlite particles are fully stirred and scattered by the stirring impeller 15, the hot air blown by the drying fan 3 evaporates the moisture on the perlite particles, the dried and scattered perlite particles fall on the first filter screen 14 through the blanking port 28, the perlite particles smaller than the mesh diameter of the first filter screen 14 fall down through the reciprocating rotating first filter screen 14, the perlite particles in accordance with the size are left on the first filter screen 14, the collection is completed through the discharging port 8, the perlite particles falling on the first filter screen 14 fall on the second filter screen 13 with a larger mesh number, the perlite granule that accords with the requirement after screening once more accomplishes the collection through another discharge gate 8, final remaining perlite granule falls on fixed disc 12, accomplish the collection through last discharge gate 8, thereby accomplish the multistage screening of perlite, make the perlite granule of equidimension not collect separately, convenient subsequent processing, it is more convenient the ejection of compact in order to make the perlite granule of screening out to notice, can be with fixed disc 12, first filter screen 14 and second filter screen 13 incline slightly and place, the lower extreme on every inclined plane is located the discharge gate 8 department that corresponds the setting.

In the second embodiment, on the basis of the first embodiment, in order to prevent perlite particles from blocking the filter screens in the screening process, the screening box 1 is provided with a plurality of chutes 23, the first filter screen 14 and the second filter screen 13 are fixedly connected with a plurality of connecting tables 21, the connecting tables 21 are in one-to-one correspondence with the chutes 23, a part of the connecting table 21 passing through the chute 23 is located outside the screening box 1, the connecting table 21 slides in the chute 23, the lower end of the connecting table 21 located outside the screening box 1 is fixedly connected with a rotating rack 22, the rotating rack 22 is an arc rack, when the first filter screen 14 and the second filter screen 13 do reciprocating motion, the connecting table 21 drives the rotating rack 22 to do reciprocating motion, the screening box 1 is rotatably connected with a plurality of connecting rods 24, the connecting rods 24 pass through the screening box 1, the connecting rods 24 are located below the chute 23, the connecting rods 24 are in one-to-one correspondence with the chutes 23, one end of the connecting rods 24 located outside the screening box 1 is fixedly connected with a rotating gear 25, the rotating gear 25 is meshed with the rotating rack 22, the rotating rack 22 can drive the rotating gear 25 to rotate in a reciprocating mode during reciprocating motion, the connecting rod 24 is located at one end, inside the screening box 1, of the striking strip 26, the striking strip 26 is a sheet metal strip with slight elasticity, the striking strip 26 is located on two sides of the connecting rod 24, the connecting rod 24 can drive the striking strip 26 to swing up and down during rotation, the striking strip 26 can strike the edges of the first filter screen 14 and the second filter screen 13 during upward swinging, filter screen frames are arranged on the edges of the first filter screen 14 and the second filter screen 13, the striking strip 26 is prevented from directly striking the filter screens, the service life of the filter screens is shortened, the first filter screen 14 and the second filter screen 13 are made to vibrate, perlite particles clamped in meshes of the first filter screen 14 and the second filter screen 13 are shaken out, the first filter screen 14 and the second filter screen 13 are prevented from being blocked, and screening of the perlite particles is influenced.

When the embodiment is in use, at first, the power of drying fan 3 and motor 29 is switched on, make first filter screen 14 and second filter screen 13 reciprocating motion sieve the perlite granule, because of the perlite granule is anomalous shape, some perlite granule may block in the mesh of first filter screen 14 and second filter screen 13, can drive rotation rack 22 reciprocating motion during first filter screen 14 and second filter screen 13 reciprocating motion, rotation rack 22 can drive rotation gear 25 reciprocating motion, rotation gear 25 makes the strip of striking 26 constantly strike first filter screen 14 and second filter screen 13 through connecting rod 24, make first filter screen 14 and second filter screen 13 produce vibrations, will block out the perlite granule in the mesh, prevent that the filter screen from producing the jam, the screening efficiency of perlite granule has been improved greatly.

In the third embodiment, on the basis of the first embodiment, in order to improve the discharging efficiency of the screening device, the upper end of the rotary table is rotatably connected with a wheel sleeve 16, the wheel sleeve 16 is a circular ring-shaped sleeve, the outer diameter of the wheel sleeve 16 is larger than that of the rotary table, a part of the upper end of the rotary table extends into the wheel sleeve 16 and is rotatably connected with the inner wall of the wheel sleeve 16, ratchet teeth 18 are fixedly connected to the inner wall of the wheel sleeve 16, the ratchet teeth 18 are fully distributed on the inner wall of the wheel sleeve 16 for a whole circle, the upper surface of the rotary table is rotatably connected with a pawl 19 matched with the ratchet teeth 18, one end of the pawl 19 is rotatably connected to a position far away from the center of the rotary table, the other end of the pawl 19 is matched with the ratchet teeth 18, the upper surface of the rotary table is fixedly connected with a spring leaf 20, the spring leaf 20 is an elastic metal sheet or a spring, the spring leaf 20 is attached to one surface of the pawl 19, when the pawl 19 slides out of the ratchet teeth 18, can drive the past a direction rotation of 16 intermittence nature of wheel cover through the cooperation of pawl 19 and ratchet 18 when the carousel reciprocating motion, a plurality of blades 17 of fixedly connected with on the lateral wall of wheel cover 16, blade 17 is circular-arc blade, the other end of blade 17 and the laminating of the inner wall of screening case 1, the lower surface and the first filter screen 14 of blade 17, the upper surface laminating of second filter screen 13 and fixed disc 12, can drive a plurality of blades 17 when wheel cover 16 rotates and take place to rotate, blade 17 can be with first filter screen 14, the continuous marginal promotion of the pearlite granule of second filter screen 13 and fixed disc 12 center department screening, finally make the pearlite granule of screening get into discharge gate 8 and collect.

In use, the drying fan 3 and the motor 29 are first powered on, so that the first filter screen 14 and the second filter screen 13 reciprocate to screen the perlite particles, the perlite particles far away from the first filter screen 14, the second filter screen 13 and the fixed disc 12 enter the discharge hole 8, are close to the first filter screen 14, the perlite granule of second filter screen 13 and fixed disc 12 department can produce and pile up, cooperation through pawl 19 and ratchet 18 makes wheel cover 16 along the rotation of a direction intermittent type nature during carousel reciprocating rotation, wheel cover 16 can drive a plurality of blades 17 when rotating together, the rotation of blade 17 can be with first filter screen 14, the perlite granule of second filter screen 13 and fixed disc 12 center department screening is continuous to the edge promotion, the perlite granule that finally makes the screening get into discharge gate 8 and collects, the discharge efficiency of screening plant has been improved greatly.

Fourth embodiment, in order to prevent the perlite particles falling onto the first filter screen 14, the second filter screen 13 and the fixed disk 12 from entering the wheel sleeve 16 on the basis of the third embodiment, the limiting rod 5 is fixedly connected with a plurality of domes 27, the lower end of the dome 27 is rotatably connected with the wheel sleeve 16, the upper end of the dome 27 is a convex dome, the falling perlite particles can slide down along the edge of the dome 27 to the periphery, and a part of the perlite particles is prevented from entering the wheel sleeve 16 and being not screened, so that the rotation of the wheel sleeve 16 is influenced.

The fifth embodiment, on the basis of embodiment one, for better carry out drying process to the perlite granule, the top of screening case 1 seted up the blow vent 30, the hot-blast moisture evaporation that makes on the perlite granule that drying fan 3 insufflates, the moisture of evaporation passes through the blow vent 30 and discharges, when the perlite granule is too moist, can directly set up the blow vent at drying fan 3's offside, the hot-blast moisture that drying fan 3 blew off can directly take away moisture, prevent that moisture from liquefying in screening case 1 once more, guarantee that the perlite granule of screening out is enough dry can directly carry out subsequent calcination processing.

When the invention is used, firstly, the power supply of the drying fan 3 and the motor 29 is switched on, the motor 29 drives the stirring impeller 15 and the rotating rod 6 to rotate, perlite particles to be classified and screened are poured into the feeding hole 2, hot air blown by the drying fan 3 evaporates water on the perlite particles, the water is discharged through the air vent 30, the perlite particles are ensured to be sufficiently dried, the stirring impeller 15 fully stirs and scatters the perlite particles, the processed perlite particles fall onto the first filter screen 14 and the second filter screen 13 through the blanking hole 28 for classification and screening, the screened perlite particles are pushed into the discharging hole 8 by the blades 17 for collection, the classification and screening of the perlite particles are completed, the screened perlite particles are sufficiently dried, the subsequent roasting treatment can be directly carried out, and the invention is a three-stage screening, when four-stage or more-stage screening is required, a plurality of same screening structures can be directly arranged in the screening box 1, and more levels of screening can be realized.

The invention effectively solves the problems that the existing perlite particle screening device is complex in screening process and inconvenient to move after being installed, cannot complete screening of perlite in multiple stages, needs to screen with screens with different meshes for multiple times, has low screening efficiency, and is easy to block the screens in the screening process due to irregular appearance of perlite, thereby facilitating the use of the screening device and greatly improving the process of grading and screening the perlite particles.

Claims

1. The utility model provides a perlite granule screening plant, its characterized in that includes screening case (1), the fixed intercommunication in screening case (1) top have feed inlet (2), screening case (1) upper end outside jade on fixedly connected with drying blower (3), screening case (1) internal rotation be connected with impeller (15), impeller (15) lower extreme open and to have blanking mouth (28), screening case (1) lower extreme lateral wall on fixedly connected with motor (29), screening case (1) bottom rotation be connected with rolling disc (4), rolling disc (4) on a plurality of gag lever posts (5) of fixedly connected with, screening case (1) inside wall on rotate and to be connected with two dwang (6), two dwang (6) between fixedly connected with gag lever post (7), two dwang (6) about the mid point symmetry of gag lever post (7), the stop lever (7) passes through the limiting rods (5) and is in contact connection with the limiting rods (5), the limiting rods (5) are fixedly connected with turntables, each turntable comprises a first turntable (9), a second turntable (10) and a third turntable (11), the outer side of each first turntable (9) is rotatably connected with a fixed disc (12), each second turntable (10) is located above the corresponding first turntable (9), the outer side of each second turntable (10) is fixedly connected with a second filter screen (13), each third turntable (11) is located above the corresponding second turntable (10), the outer side of each third turntable (11) is fixedly connected with a first filter screen (14), and the outer side of the screening box (1) is fixedly communicated with a plurality of discharge holes (8);

a plurality of chutes (23) are arranged on the screening box (1), a plurality of connecting platforms (21) are fixedly connected with the outer sides of the first filter screen (14) and the second filter screen (13), the connecting table (21) passes through the sliding groove (23) and slides in the sliding groove (23), the lower end of the connecting platform (21) positioned outside the screening box (1) is fixedly connected with a rotating rack (22), a plurality of connecting rods (24) are rotatably connected on the screening box (1), the connecting rods (24) penetrate through the screening box (1), one end of the connecting rod (24) positioned in the screening box (1) is fixedly connected with an impact strip (26), the other end of the connecting rod (24) is fixedly connected with a rotating gear (25), the rotating gear (25) is meshed with the rotating rack (22).

2. The perlite particle screening device as claimed in claim 1, wherein the upper end of the rotary disc is rotatably connected with a wheel sleeve (16), the inner ring of the wheel sleeve (16) is fixedly connected with a ratchet (18), the rotary disc is rotatably connected with a pawl (19) matched with the ratchet (18), the rotary disc is fixedly connected with a spring piece (20), the spring piece (20) is attached to the pawl (19), a plurality of blades (17) are fixedly connected to the outer side of the wheel sleeve (16), the blades (17) are circular arc-shaped blades, and one end of each blade (17) is attached to the inner wall of the screening box (1).

3. The perlite particle screening device as recited in claim 2, characterized in that a plurality of dome covers (27) are fixedly connected to the limiting rod (5), and the lower ends of the dome covers (27) are rotatably connected with the wheel sleeve (16).

4. The perlite particle screening device as claimed in claim 1, characterized in that the top of the screening box (1) is provided with an air vent (30).