CN112275377A

CN112275377A - Recyclable dustless multistage crushing and screening all-in-one machine

Info

Publication number: CN112275377A
Application number: CN202011012307.5A
Authority: CN
Inventors: 羊彬
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-01-29

Abstract

The invention relates to the technical field of crushing and screening integrated machines, and discloses a recyclable dust-free multistage crushing and screening integrated machine which comprises a first shell, wherein four supporting columns are fixedly installed at the bottom of the first shell, a first installation seat is fixedly installed on the lower end face of the first shell, a feeding hole is fixedly installed on the lower end face of the first installation seat, a first motor box is fixedly installed on the right end face of the first shell, and a first driving motor is fixedly installed inside the first motor box. This multistage crushing screening all-in-one of circulated dustless formula, through twice breakage, the crushing ability of device has been increased, and because screening net one is located same vertical line with screening net two, and then play the effect of many times screening, the screening ability of device has been improved greatly, utilize to rotate to connect and can open the rotor plate when the feeding, self-closing when not feeding, thereby rotor plate automatic switch has been realized, the leakage of dust has been reduced, staff's healthy has been protected, the practicality of device has been improved greatly.

Description

Recyclable dustless multistage crushing and screening all-in-one machine

Technical Field

The invention relates to the technical field of crushing and screening integrated machines, in particular to a recyclable dust-free multistage crushing and screening integrated machine.

Background

The coal conveying system at home and abroad adopts a counterattack crusher, a ring hammer crusher, a double-roll crusher, a hammering crusher and the like, and the double-roll crusher is suitable for crushing medium and high hardness materials in the industrial departments of metallurgy, building materials, refractory materials and the like. The series of double-roller type crushers mainly comprise rollers, roller supporting rotating shafts, pressing and adjusting devices, driving devices and the like.

But present most crushing and screening all-in-one only is provided with the layer and screens the board to the effect that leads to the screening is relatively poor, and present most crushing and screening all-in-one only is provided with a set of crushing mechanism, leads to the material can not fully be broken, and the use not convenient for, and the screening mechanism of present most crushing and screening all-in-one is fixed mounting, and the dismantlement and the washing not convenient for, thereby lead to the screening effect relatively poor, the use not convenient for.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a recyclable dust-free multistage crushing and screening all-in-one machine, which solves the problems that most of the existing crushing and screening all-in-one machines are poor in screening effect due to the fact that only a layer of screening plate is arranged, materials cannot be sufficiently crushed due to the fact that most of the existing crushing and screening all-in-one machines are only provided with a group of crushing mechanisms, and the crushing and screening all-in-one machines are inconvenient to use, and are poor in screening effect and inconvenient to use due to the fact that the screening mechanisms of most of the existing crushing and screening all-in-one machines.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a recyclable dust-free multistage crushing and screening integrated machine comprises a first shell, four supporting columns are fixedly mounted at the bottom of the first shell, a first mounting seat is fixedly mounted on the lower end face of the first shell, a blanking port is fixedly mounted on the lower end face of the first mounting seat, a first motor box is fixedly mounted on the right end face of the first shell, a first driving motor is fixedly mounted inside the first motor box, a first gear is fixedly mounted on an output shaft of the first driving motor, a first crushing roller is fixedly mounted on an output shaft of the first driving motor, another first crushing roller is arranged inside the first shell, first gears are arranged on the outer sides of the two first crushing rollers and are meshed with each other, a screening box is fixedly mounted on the upper end face of the first shell, a pneumatic box is fixedly mounted on the right end face of the screening box, and a fixed support is fixedly mounted at the top inside of the pneumatic box, the inner side of the fixed support is fixedly provided with an air cylinder, the left end face of the air cylinder is movably provided with a telescopic shaft, the left end face of the telescopic shaft is fixedly provided with a telescopic rod through a bolt, the left end face of the telescopic rod is fixedly provided with a first slide block, the inside of the screening box is provided with a first screening plate, the upper end face of the first screening plate is fixedly provided with two baffle plates, the left side and the right side of the first screening plate are both provided with chutes, the lower end face of the first screening plate is fixedly provided with a second screening plate, the upper end face of the first screening plate is fixedly provided with a first screening net, the upper end face of the second screening plate is fixedly provided with a second screening net, the right side of the inner wall of the screening box is fixedly provided with a fixed sleeve, the inside of the fixed sleeve is provided with two limit supports, idler wheels are movably arranged between, the upper end face of the screening box is fixedly provided with a second shell, the right end face of the second shell is fixedly provided with a second motor box, the inside of the second motor box is fixedly provided with a second driving motor, the output shaft of the second driving motor is fixedly provided with a second gear and a second crushing roller, the outer side of the second crushing roller is provided with a first crushing fragment, the inside of the second shell is provided with a third crushing roller, the outer side of the third crushing roller is fixedly provided with a second crushing fragment, the rotating shaft of the third crushing roller is fixedly provided with a second gear, the second gear on the second crushing roller is meshed and connected with the second gear on the third crushing roller, the top of the second shell is provided with a feed inlet, the inner side of the feed inlet is fixedly provided with two fixed seats, a rotating shaft is arranged between the two fixed seats, the outer side of the rotating shaft is fixedly provided with a rotating plate, and, and a control panel is fixedly arranged on the front end surface of the second shell.

Preferably, the pillars are symmetrically distributed at four corners of the bottom of the first shell respectively, the upper end of the feed opening extends into the first shell, a plurality of first broken pieces are arranged on the outer sides of the two first crushing rollers, the first broken pieces on the two first crushing rollers are distributed in a staggered mode, and the two first crushing rollers are in transmission connection.

Preferably, the width of the first broken block and the width of the second sliding block are equal to the width of the sliding groove, the height of the first broken block and the height of the second sliding block are equal to the height of the sliding groove, the length of the first broken block and the length of the second sliding block are equal to the length of the sliding groove, and the first broken block and the second sliding block are matched with the sliding groove.

Preferably, the first screening net and the second screening net are made of steel wires, the first screening net and the second screening net are located on the same vertical line, and the aperture of the first screening net is the same as that of the second screening net.

Preferably, the second crushing roller is in transmission connection with the third crushing roller, the first crushing blocks on the outer side of the second crushing roller and the second crushing blocks on the outer side of the third crushing roller are in staggered distribution, and the first crushing blocks and the second crushing blocks are in equidistant distribution.

Preferably, the screening box is located between the first shell and the second shell, the bottoms of the first shell, the screening box and the second shell are funnel-shaped, the lower end of the second shell is an opening-shaped mechanism, and the upper end and the lower end of the screening box are opening-shaped structures.

Preferably, telescopic link and spacing support and screening board one are swing joint, the length of screening board one is less than the length of screening case, the width of screening board one is less than the width of screening case, baffle symmetric distribution is in the left and right sides of screening board one.

Preferably, the rotating shaft is located in the center of the rotating plate, the fixing seats are symmetrically distributed on the left side and the right side of the rotating plate, and the lower end of the feeding port extends into the second shell.

Preferably, the width of the rotating plate is smaller than that of the lower end of the feeding hole, the length of the rotating plate is smaller than that of the lower end of the feeding hole, and the rotating plate is rotatably connected with the feeding hole.

Compared with the prior art, the invention provides a recyclable dust-free multistage crushing and screening integrated machine, which has the following beneficial effects:

1. this multistage crushing screening all-in-one of circulated dustless formula through the setting of crushing roller one to and the broken piece on two crushing rollers one is the staggered distribution, utilizes broken piece one to be the staggered distribution and can carry out a lot of extrusion to the material, and broken piece one is the staggered distribution with broken piece two, has strengthened the crushing ability of device greatly, and through twice breakage, has increased the crushing effect of device, easy operation, convenient to use.

2. This multistage crushing screening all-in-one of circulated dustless formula, through the setting of slider one and slider two, and slider one and slider two and spout looks adaptation, utilize slider one and slider two and spout looks adaptation, thereby realize the quick assembly disassembly of screening board one, can wash screening board one and screening board two when using the completion, the practicality of device has been greatly improved, and because screening net one is located same vertical line with screening net two, and then play the effect of many times screening, the screening ability of device has been greatly improved.

3. This circulated multistage crushing and screening all-in-one of dustless formula through the setting of rotor plate, utilizes rotor plate and feed inlet to be connected for rotating, utilizes to rotate to connect and can open when the feeding, self-closing when not feeding to realized rotor plate automatic switch, at the in-process of user equipment, reduced leaking of dust, protected that the staff is healthy, improved the practicality of device greatly

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

FIG. 3 is a schematic perspective view of a screening plate according to the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 2 according to the present invention;

FIG. 5 is a schematic view of a second gear mounting structure of the present invention;

FIG. 6 is a schematic view of a mounting structure of a second crushing roller in accordance with the present invention;

fig. 7 is a schematic view of the rotating plate mounting structure of the present invention.

Wherein: 1. a first shell; 2. a pillar; 3. a first mounting seat; 4. a feeding port; 5. a first motor box; 6. Driving a motor I; 7. a first gear; 8. a first crushing roller; 9. a screening box; 10. a pneumatic tank; 11. fixing a bracket; 12. a cylinder; 13. a telescopic shaft; 14. a telescopic rod; 15. screening a plate I; 16. a baffle plate; 17. A chute; 18. a second screening plate; 19. screening a first screen; 20. screening a second screen; 21. a first sliding block; 22. fixing the sleeve; 23. a limiting bracket; 24. a roller; 25. a second sliding block; 26. a second shell; 27. a motor box II; 28. a second driving motor; 29. a second gear; 30. a second crushing roller; 31. crushing a first fragment; 33. a third crushing roller; 34. crushing a second fragment; 35. a feed inlet; 36. a fixed seat; 37. a rotating shaft; 38. a rotating plate; 39. a sealing door; 40. a control panel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, a recyclable dust-free multi-stage crushing and screening all-in-one machine comprises a housing 1, and is characterized in that: four pillars 2 are fixedly installed at the bottom of a first shell 1, a first installation seat 3 is fixedly installed on the lower end face of the first shell 1, a blanking opening 4 is fixedly installed on the lower end face of the first installation seat 3, a first motor box 5 is fixedly installed on the right end face of the first shell 1, a first driving motor 6 is fixedly installed inside the first motor box 5, a first gear 7 is fixedly installed on an output shaft of the first driving motor 6, a first crushing roller 8 is fixedly installed on an output shaft of the first driving motor 6, another first crushing roller 8 is arranged inside the first shell 1, first gears 7 are arranged on the outer sides of the first two crushing rollers 8, the first two gears 7 are in meshing connection, a screening box 9 is fixedly installed on the upper end face of the first shell 1, a pneumatic box 10 is fixedly installed on the right end face of the screening box 9, a fixed support 11 is fixedly installed on the top inside the pneumatic box 10, and an air cylinder, an expansion shaft 13 is movably mounted on the left end face of the air cylinder 12, an expansion rod 14 is fixedly mounted on the left end face of the expansion shaft 13 through bolts, a first slide block 21 is fixedly mounted on the left end face of the expansion rod 14, a first screening plate 15 is arranged inside the screening box 9, two baffle plates 16 are fixedly mounted on the upper end face of the first screening plate 15, sliding chutes 17 are formed in the left side and the right side of the first screening plate 15, a second screening plate 18 is fixedly mounted on the lower end face of the first screening plate 15, a first screening net 19 is fixedly mounted on the upper end face of the first screening plate 15, a second screening net 20 is fixedly mounted on the upper end face of the second screening plate 18, a fixed sleeve 22 is fixedly mounted on the right side of the inner wall of the screening box 9, two limiting supports 23 are arranged inside the fixed sleeve 22, a roller 24 is movably mounted between the two limiting supports 23, a second slide block 25 is fixedly mounted on the right, a second motor box 27 is fixedly installed on the right end face of the second shell 26, a second driving motor 28 is fixedly installed inside the second motor box 27, a second gear 29 and a second crushing roller 30 are fixedly installed on an output shaft of the second driving motor 28, a first crushing block 31 is arranged on the outer side of the second crushing roller 30, a third crushing roller 33 is arranged inside the second shell 26, a second crushing block 34 is fixedly installed on the outer side of the third crushing roller 33, a second gear 29 is fixedly installed on a rotating shaft of the third crushing roller 33, the second gear 29 on the second crushing roller 30 is in meshing connection with the second gear 29 on the third crushing roller 33, a feeding port 35 is arranged at the top of the second shell 26, two fixed seats 36 are fixedly installed on the inner side of the feeding port 35, a rotating shaft 37 is arranged between the two fixed seats 36, a rotating plate 38 is fixedly installed on the outer side of the rotating shaft 37, and, the front end face of the second casing 26 is fixedly provided with a control panel 40, the second driving motor 28, the fixed support 11, the first driving motor 6 and the control panel 40 are electrically connected, and the cylinder 12 is of a type TDA32X 60.

Further, pillar 2 is the four corners of symmetric distribution in shell 1 bottom respectively, the upper end of feed opening 4 extends to the inside of shell 1, the outside of two crushing roller 8 all is provided with a plurality of broken fragments 31, broken fragments 31 on two crushing roller 8 are the staggered distribution, two crushing roller 8 are connected for the transmission, setting through crushing roller 8, and broken fragments 31 on two crushing roller 8 are the staggered distribution, utilize broken fragments 31 to be the staggered distribution and can carry out a lot of extrusion to the material, thereby play even broken effect, the crushing ability of device has been improved greatly.

Furthermore, the width of the first crushing block 31 and the width of the second sliding block 25 are equal to the width of the sliding groove 17, the height of the first crushing block 31 and the height of the second sliding block 25 are equal to the height of the sliding groove 17, the length of the first crushing block 31 and the length of the second sliding block 25 are equal to the length of the sliding groove 17, the first crushing block 31 and the second sliding block 25 are matched with the sliding groove 17, the first crushing block 21 and the second sliding block 25 are arranged, the first sliding block 21 and the second sliding block 25 are matched with the sliding groove 17, and the first sliding block 21 and the second sliding block 25 are matched with the sliding groove 17, so that the first screening plate 15 is.

Furthermore, the first screening net 19 and the second screening net 20 are made of steel wires, the first screening net 19 and the second screening net 20 are located on the same vertical line, the first screening net 19 and the second screening net 20 are identical in aperture, and unqualified materials can be separated by using the first screening net 19 and the second screening net 20 through the arrangement of the first screening net 19 and the second screening net 20 and the arrangement of the first screening net 19 and the second screening net 20 on the same vertical line, so that the screening effect is achieved, and the screening capacity of the device is greatly improved.

Further, two 30 of crushing rollers are connected for the transmission with three 33 of crushing rollers, and the broken piece in two 30 outsides of crushing rollers is the staggered distribution with two 34 of the broken piece in the three 33 outsides of crushing rollers, and broken piece is 31, two 34 of broken piece are equidistant distribution, through two 30 of crushing rollers and three 33's of crushing rollers setting, utilize the transmission to be connected, and then drive three 33's of crushing rollers rotation, played broken effect.

Further, screening case 9 is located between shell one 1 and shell two 26, shell one 1, the inside bottom of screening case 9 and shell two 26 all is "funnel" form, the lower extreme of shell two 26 is opening form mechanism, the upper and lower both ends of screening case 9 are opening form structure, through shell one 1, the setting of screening case 9 and shell two 26, and shell one 1, the inside bottom of screening case 9 and shell two 26 all is "funnel" form, utilize the bottom all to be "funnel" form structure can be with the inside of screening case 9 and shell two 26 of the material transmission that closes up.

Further, telescopic link 14 and spacing support 23 are swing joint with screening board 15, and the length of screening board 15 is less than the length of screening case 9, and the width of screening board 15 is less than the width of screening case 9, and baffle 16 symmetric distribution is in the left and right sides of screening board 15, through telescopic link 14 and spacing support 23 and screening board 15 for swing joint's setting, utilizes swing joint to the quick assembly disassembly of screening board 15 has been realized.

Furthermore, the rotating shaft 37 is located at the center of the rotating plate 38, the fixing seats 36 are symmetrically distributed on the left side and the right side of the rotating plate 38, the lower end of the feed inlet 35 extends into the second housing 26, and the rotating shaft 37 can be fixed and limited by arranging the fixing seats 36 symmetrically distributed on the left side and the right side of the rotating plate 38.

Further, the width of rotor plate 38 is less than the width of feed inlet 35 lower extreme, the length of rotor plate 38 is less than the length of feed inlet 35 lower extreme, rotor plate 38 is connected for rotating with feed inlet 35, through the setting of rotor plate 38, utilize rotor plate 38 and feed inlet 35 to be connected for rotating, utilize to rotate to connect and can open when the feeding, self-closing when not feeding to realized rotor plate 38 automatic switch, at the in-process of using device, reduced leaking of dust, improved the practicality of device greatly.

When the crushing device is used, a worker puts a material to be crushed into the feeding hole 35, the material is accumulated on the rotating plate 38 under the influence of gravity, the rotating plate 38 is rotatably connected with the feeding hole 35, the automatic opening and closing of the rotating plate 38 are realized, the leakage of dust is reduced, the physical health of the worker is protected, when the material enters the shell II 26, the driving motor II 28 is started to drive the crushing roller II 30 to rotate, the crushing roller II 30 is in transmission connection with the crushing roller III 33, the crushing roller III 33 is further driven to rotate, as the crushing blocks I31 and the crushing block II 34 are in equal-interval distribution, the crushing blocks I31 and the crushing block II 34 are in staggered distribution, and when the crushing roller II 30 and the crushing roller III 33 rotate, the material can be extruded for multiple times, so that the effect of uniform crushing is achieved, the crushing capacity of the device is greatly improved, when the first crushing is finished, the lower end in the shell II 26 is arranged to be funnel-shaped, materials can uniformly enter the inside of the screening box 9 under the influence of gravity, at the moment, a worker opens the air cylinder 12 through the control panel 40, the air cylinder 12 converts pressure into power through inflation and air exhaust, so that the reciprocating motion of the telescopic shaft 13 is realized, the materials can be screened, the screening net I19 and the screening net II 20 are arranged, the screening net I19 and the screening net II 20 are positioned on the same vertical line, unqualified materials can be separated through the screening net I19 and the screening net II 20, the effect of multiple screening is further realized, the screening capacity of the device is greatly improved, when the screened materials enter the shell I1, the driving motor I6 is started, the output shaft of the driving motor I6 drives the two crushing rollers I8 to rotate, and then carry out the secondary crushing to the material, the crushing ability of device has been improved greatly, when the material breakage was accomplished, carry to strorage device through feed opening 4, the staff opens sealing door 39 this moment, take out screening plate 15 from the inside of screening case 9, collect the material on screening plate 15 and the screening plate two 18, install screening plate 15 in the inside of screening case 9 once more when collecting the completion, pour the inside of feed inlet 35 into again with the material of collecting, thereby realize the circulation breakage.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a multistage crushing and screening all-in-one of dustless formula that can circulate, includes shell one (1), its characterized in that: the bottom of the first shell (1) is fixedly provided with four supporting columns (2), the lower end face of the first shell (1) is fixedly provided with a first mounting seat (3), the lower end face of the first mounting seat (3) is fixedly provided with a blanking port (4), the right end face of the first shell (1) is fixedly provided with a first motor box (5), the inside of the first motor box (5) is fixedly provided with a first driving motor (6), the output shaft of the first driving motor (6) is fixedly provided with a first gear (7), the output shaft of the first driving motor (6) is fixedly provided with a first crushing roller (8), the inside of the first shell (1) is provided with another first crushing roller (8), the outer sides of the two first crushing rollers (8) are respectively provided with a first gear (7), the two first gears (7) are meshed and connected, the upper end face of the first shell (1) is fixedly provided with a screening box (9), the pneumatic screening device is characterized in that a pneumatic box (10) is fixedly mounted on the right end face of the screening box (9), a fixed support (11) is fixedly mounted at the top of the interior of the pneumatic box (10), an air cylinder (12) is fixedly mounted on the inner side of the fixed support (11), a telescopic shaft (13) is movably mounted on the left end face of the air cylinder (12), a telescopic rod (14) is fixedly mounted on the left end face of the telescopic shaft (13) through bolts, a first sliding block (21) is fixedly mounted on the left end face of the telescopic rod (14), a first screening plate (15) is arranged inside the screening box (9), two baffles (16) are fixedly mounted on the upper end face of the first screening plate (15), sliding grooves (17) are formed in the left side and the right side of the first screening plate (15), a second screening plate (18) is fixedly mounted on the lower end face of the first screening plate (15), and a first screening net (19) is fixedly mounted on, the upper end face of the second screening plate (18) is fixedly provided with a second screening net (20), the right side of the inner wall of the screening box (9) is fixedly provided with a fixed sleeve (22), two limiting supports (23) are arranged inside the fixed sleeve (22), a roller (24) is movably arranged between the two limiting supports (23), the right end face of each limiting support (23) is fixedly provided with a second slider (25), the upper end face of the screening box (9) is fixedly provided with a second shell (26), the right end face of the second shell (26) is fixedly provided with a second motor box (27), the inside of the second motor box (27) is fixedly provided with a second driving motor (28), an output shaft of the second driving motor (28) is fixedly provided with a second gear (29) and a second crushing roller (30), and the outer side of the second crushing roller (30) is provided with a first fragment (31), the inside of shell two (26) is provided with crushing roller three (33), the outside fixed mounting of crushing roller three (33) has broken piece two (34), fixed mounting has gear two (29) in the pivot of crushing roller three (33), and gear two (29) on the crushing roller two (30) and gear two (29) on the crushing roller three (33) are the meshing connection, the top of shell two (26) is provided with feed inlet (35), the inboard fixed mounting of feed inlet (35) has two fixing bases (36), two be provided with axis of rotation (37) between fixing base (36), the outside fixed mounting of axis of rotation (37) has rotor plate (38), screening case (9) front end face has sealing door (39) through hinge movable mounting, the front end face fixed mounting of shell two (26) has control panel (40).

2. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: pillar (2) symmetric distribution is in the four corners of shell (1) bottom respectively, the upper end of feed opening (4) extends to the inside of shell (1), two the outside of crushing roller (8) all is provided with a plurality of broken fragments one (31), two broken fragments one (31) on crushing roller (8) are the staggered distribution, two crushing roller (8) are the transmission and connect.

3. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: the width of the first broken block (31) and the width of the second sliding block (25) are equal to the width of the sliding groove (17), the height of the first broken block (31) and the height of the second sliding block (25) are equal to the height of the sliding groove (17), the length of the first broken block (31) and the length of the second sliding block (25) are equal to the length of the sliding groove (17), and the first broken block (31) and the second sliding block (25) are matched with the sliding groove (17).

4. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: the screening net I (19) and the screening net II (20) are made of steel wires, the screening net I (19) and the screening net II (20) are located on the same vertical line, and the aperture of the screening net I (19) is the same as that of the screening net II (20).

5. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: the second crushing roller (30) is in transmission connection with the third crushing roller (33), the first crushing blocks (31) on the outer side of the second crushing roller (30) and the second crushing blocks (34) on the outer side of the third crushing roller (33) are in staggered distribution, and the first crushing blocks (31) and the second crushing blocks (34) are in equidistant distribution.

6. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: screening case (9) are located between shell one (1) and shell two (26), the bottom of shell one (1), screening case (9) and shell two (26) inside all is "funnel" form, the lower extreme of shell two (26) is opening form mechanism, the upper and lower both ends of screening case (9) are opening form structure.

7. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: telescopic link (14) and spacing support (23) are swing joint with screening board (15), the length of screening board (15) is less than the length of screening case (9), the width of screening board (15) is less than the width of screening case (9), baffle (16) symmetric distribution is in the left and right sides of screening board (15).

8. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: the rotating shaft (37) is positioned in the center of the rotating plate (38), the fixed seats (36) are symmetrically distributed on the left side and the right side of the rotating plate (38), and the lower end of the feeding hole (35) extends into the shell II (26).

9. The recyclable dust-free multistage crushing and screening all-in-one machine as claimed in claim 1, wherein: the width of the rotating plate (38) is smaller than the width of the lower end of the feeding hole (35), the length of the rotating plate (38) is smaller than the length of the lower end of the feeding hole (35), and the rotating plate (38) is rotatably connected with the feeding hole (35).