CN212468804U - Multistage screening machine for powder objects - Google Patents

Abstract

The utility model relates to the technical field of feed processing, and discloses a multistage screening machine for powder objects, which solves the problem that the screening machine needs to be driven by a plurality of motors to carry out multistage screening on the powder objects in the prior art, and comprises a driving component and a screening mechanism, wherein the driving component comprises a driving motor, the number of the driving motor is one, the driving component also comprises an eccentric wheel, the driving motor drives the eccentric wheel to rotate, the eccentric wheel is fixed at the bottom of the screening mechanism, the eccentric wheel drives the gravity center of the screening mechanism to shift when rotating, so that the screening mechanism shakes, the screening mechanism comprises a plurality of screening components, holes with different sizes are arranged on the plurality of screening components, the hole sizes of the plurality of screening components from top to bottom gradually decrease, when the screening components are divided according to groups, the hole size of each group of screening component gradually decreases, the whole screening mechanism is driven by one driving motor to shake, so that the feed smoothly passes through each screening component, the number of motors is reduced.

Description

Multistage screening machine for powder objects

Technical Field

The utility model belongs to the technical field of feed processing's technique and specifically relates to a multistage sieve separator of powder object is related to.

Background

The general types of the feed have various choices, the existing part of the feed adopts a powder formulation, and a screening machine is used for screening in the production process.

For example, the authorization notice number is CN209238435U discloses a multi-stage screening type wheat stoner, which discloses a multi-stage screening type wheat stoner, comprising a shell, wherein the upper end inside the shell is provided with a conveying auger, the lower surface of the conveying auger is uniformly provided with a first-stage sieve pore, the lower end of the conveying auger is provided with a first impurity collecting box, and the lower surface of the conveying auger is fixed at the top of the first impurity collecting box; a drawer is arranged in the middle of the shell, an opening is formed in the bottom of the drawer, a secondary screen is fixed on the opening, and a first vibration motor is connected to the secondary screen; the lower end of the shell is obliquely provided with a third-level screen, the third-level screen is connected with a second vibrating motor, and one side of the third-level screen is provided with a wheat particle outlet communicated with the shell. The utility model discloses a multistage screening formula wheat destoner adopts multistage screening formula structure, high-efficient economic get rid of the large granule thing that is mingled with in the wheat granule, little particulate matter and with the similar particulate matter impurity of wheat volume.

The above prior art solutions have the following drawbacks: it need use two motors to drive two screens respectively and vibrate at multistage screening process, is unfavorable for the synchronous of screening process to open and stop, and it is more to use the resource that two motors consumed simultaneously, also is more hard when maintaining.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multistage sieve separator of fodder, reduced the number of motor, accomplish to drive whole multistage sieve separator through a motor and filter the fodder.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a multistage sieve separator of powder object, includes drive assembly and screening mechanism, drive assembly includes driving motor, driving motor quantity is one, drive assembly still includes an eccentric wheel, driving motor drive eccentric wheel rotates, the eccentric wheel is fixed in screening mechanism bottom, the focus that drives screening mechanism when the eccentric wheel rotates takes place the skew, makes screening mechanism takes place to rock, screening mechanism includes a plurality of sieve material subassemblies, and is a plurality of be equipped with the hole of equidimension not on the sieve material subassembly, by last a plurality of under a plurality of the hole size of sieve material subassembly progressively diminishes step by step, works as when the sieve material subassembly divides according to the group, every group the hole size of sieve material subassembly progressively diminishes step by step.

Through adopting above-mentioned scheme, a driving motor drives the eccentric wheel and rotates, thereby makes the focus of screening mechanism take place to squint and rock, consequently drives whole screening mechanism and carries out multistage screening to the fodder.

The present invention may be further configured in a preferred embodiment as: screening mechanism still includes and connects the material subassembly, it is the same with the quantity of sieve material subassembly to connect the quantity of material subassembly, and is a plurality of connect material subassembly parallel arrangement each other, every connect the material subassembly to locate corresponding sieve material subassembly top, just a plurality of connect the material subassembly to be located the same projection plane of a plurality of sieve material subassemblies.

Through adopting above-mentioned scheme, make the fodder earlier through connect the material subassembly to fall into sieve material subassembly again on, make the fodder collect same position through connecing the material subassembly and fall into sieve material subassembly to make the fodder move on sieve material subassembly apart from the extension, with sieve material process extension, make the effect of sieve material better.

The present invention may be further configured in a preferred embodiment as: connect material subassembly and sieve material subassembly all slope setting, connect material subassembly and sieve material subassembly opposite direction of slope, connect material subassembly lower extreme to be close to sieve material subassembly upper end.

Through adopting above-mentioned scheme, the slope sets up and connects material subassembly and sieve material subassembly, makes the fodder also receive the gravity effect to influence spontaneous downstream when rocking the removal under the circumstances that is driven by driving motor, has increased the efficiency and the effect of sieve material.

The present invention may be further configured in a preferred embodiment as: still include box mechanism, screening mechanism locates in the box mechanism.

By adopting the scheme, the external pollution is isolated, and the safety of the feed is ensured.

The present invention may be further configured in a preferred embodiment as: the box body mechanism comprises a box door, a fixed rod is arranged outside the box door, the lower end of the fixed rod is rotatably connected with the lower end of the box body mechanism, a threaded connection limiting nut is arranged at the upper end of the fixed rod, when the fixed rod is vertically placed, the limiting nut is screwed downwards to abut against the upper surface of the box body mechanism, the box body mechanism tightly clamps and fixes the box door, the lower surface of the limiting nut abuts against the upper surface of the box body mechanism when the limiting nut is screwed down at the upper end of the fixed rod, the box door is abutted between the upper end and the lower end of the box body mechanism, and the box door is drawn out of the box body when the limiting.

By adopting the scheme, the box door convenient to detach enables the maintenance inside the screening machine to be more convenient, and meanwhile, the cleaning inside the screening machine is convenient to carry out.

The present invention may be further configured in a preferred embodiment as: the handle is arranged on the limiting nut and perpendicular to the limiting nut.

Through adopting above-mentioned scheme, it is more convenient to set up the rotation that the handle made the nut, changes in dismantling the chamber door.

The present invention may be further configured in a preferred embodiment as: the box body mechanism is characterized by further comprising a fixing mechanism, a connecting piece is arranged on the fixing mechanism, the fixing mechanism is connected to the upper end of the connecting piece, the lower end of the connecting piece is connected with the box body mechanism, and the box body mechanism is fixed with the fixing mechanism through the connecting piece.

By adopting the scheme, the connecting piece is fixed to enable the box body mechanism to vibrate smoothly, and meanwhile, the vibration range of the box body mechanism is limited during vibration.

The present invention may be further configured in a preferred embodiment as: the connecting piece upper end is a knee, fixed establishment still includes first fixed block, the connecting piece runs through first fixed block, the upper surface of the first fixed block of lower surface butt of knee.

Through adopting above-mentioned scheme, make the connecting piece be difficult for breaking away from fixed establishment, guaranteed the stability of sieve separator structure.

To sum up, the utility model discloses a following at least one useful technological effect:

1. completing a multi-stage screening process of the feed through a driving motor;

2. the cleaning and maintenance work of the interior of the screening machine is convenient;

3. the stability of the structure of the screening machine is ensured.

Drawings

FIG. 1 is a schematic view of the overall structure of a multi-stage screening machine for powdered objects.

FIG. 2 is a schematic view of a multi-stage screening machine for powdered objects.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 2.

Fig. 5 is a schematic view of a part of the cover.

Fig. 6 is a schematic view of the overall structure of the box mechanism.

Figure 7 is a schematic view of a fixation rod connection.

Fig. 8 is a schematic view of the cabinet mechanism with the door open.

Fig. 9 is a schematic view of the overall structure of the screening mechanism.

Fig. 10 is a schematic view of the entire structure of the drive mechanism.

Reference numerals: 1. a fixing mechanism; 11. a support pillar; 12. a bottom bar; 13. an auxiliary lever; 14. a top rod; 141. a first fixed block; 1411. a first connection hole; 1412. fixing the bolt; 142. a connecting member; 1421. a straight rod; 1422. bending a rod; 143. a steel wire; 2. a box mechanism; 21. a base; 211. a base plate; 2111. a waste material port; 212. a baffle plate; 2121. a second fixed block; 2122. a second connection hole; 22. a fixing plate; 23. a box door; 231. a third fixed block; 232. fixing the rod; 233. a limit nut; 2331. a handle; 24. a box cover; 241. a fourth fixed block; 242. a feed inlet; 243. a cloth bag; 244. a bag tying rope; 3. a screening mechanism; 31. a screen assembly; 311. a first screen plate; 312. a second screen plate; 313. a third screen plate; 314. a fourth screen plate; 32. a material receiving assembly; 321. a first receiving plate; 322. a second material receiving plate; 323. a third material receiving plate; 324. a fourth material receiving plate; 33. a blanking assembly; 331. a first blanking pipe; 332. a second blanking pipe; 333. a third blanking pipe; 334. a fourth blanking pipe; 34. a drive assembly; 341. a drive motor; 3411. a drive shaft; 342. a belt; 343. an eccentric wheel; 3431. a rotating shaft; 3432. a fifth fixed block; 4. and a feeding pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to the attached drawing 1, for the utility model discloses a multistage screening machine of powder object installs in the below of pan feeding pipe 4, including fixed establishment 1, fixed establishment 1 includes support column 11, sill bar 12 and ejector pin 14.

The number of the support columns 11 is four, and the support columns 11 are vertically arranged on the horizontal plane.

The number of the ejector rods 14 is four, the ejector rods 14 are perpendicular to the support columns 11, the four ejector rods 14 form a rectangle, and four corners of the rectangle of the ejector rods 14 are fixed to the upper ends of the four support columns 11 respectively.

The quantity of sill bars 12 is two, and sill bar 12 perpendicular to support column 11 sets up, and the both ends of every sill bar 12 are connected respectively on two adjacent support columns 11, and two sill bars 12 set up relatively, and the one end that the ejector pin 14 was kept away from to support column 11 is located to the position of two sill bars 12, and the distance on ground is equal at the both ends of every sill bar 12.

Still be equipped with auxiliary rod 13 on the support column 11, the quantity of auxiliary rod 13 is two, and auxiliary rod 13 perpendicular to support column 11 sets up, and auxiliary rod 13 is perpendicular with sill bar 12, and the both ends of every auxiliary rod 13 are connected respectively on two adjacent support columns 11, and two auxiliary rod 13 set up relatively, and the intermediate position of support column 11 is located to two auxiliary rods 13, and the distance between the both ends of every auxiliary rod 13 and ground is equal.

The multistage screening machine further comprises a box body mechanism 2, the box body mechanism 2 comprises a base 21, and the size of the base 21 is smaller than that of a rectangle formed by the ejector rods 14.

Referring to fig. 2, the base 21 includes four baffles 212, the baffles 212 are arranged perpendicular to the horizontal plane, and the four baffles 212 are connected to form a rectangle.

Referring to fig. 1, the two push rods 14 disposed right above the auxiliary rod 13 further include four first fixing blocks 141, each push rod 14 is provided with two first fixing blocks 141, the first fixing blocks 141 on two sides are disposed in opposite directions, the two first fixing blocks 141 on each side are respectively close to two ends of the push rod 14, the upper surface of each first fixing block 14 is flush with the upper surface of the push rod 14, and the lower surface of each first fixing block 14 is flush with the lower surface of the push rod 14.

Referring to fig. 3, each first fixing block 141 is provided with two first connection holes 1411 vertically penetrating through the first fixing block 141, and the two first connection holes 1411 of each first fixing block 141 are arranged at intervals along the length direction of the rod 14.

Two fixing bolts 1412 are arranged between every two first connecting holes 1411, the two fixing bolts 1412 are arranged at intervals, and the two fixing bolts 1412 vertically penetrate through the first fixing block 141 and are inserted into the top bar 14 and screwed down, so that the first fixing block 141 is fixed on the top bar 14.

Each first fixing block 141 is further provided with a connecting member 142, each connecting member 142 includes two vertical straight bars 1421 and two vertical bent bars 1422, two ends of each bent bar 1422 are respectively connected to upper ends of the two straight bars 1421, and the size of each straight bar 1421 is in transition fit with the first connecting hole 1411.

The two straight bars 1421 of each connecting member 142 jointly penetrate through two first connecting holes 1411 of one first fixing block 141, and the bottom end of the connecting member 142 does not exceed the bottom end of the baffle 212 (see fig. 2).

Referring to fig. 4, a second fixing block 2121 is provided on the blocking plate 212 at a position adjacent to the connection member 142.

The number of the second fixing blocks 2121 is eight, and the second fixing blocks 2121 are disposed right below the first fixing blocks 141 (refer to fig. 2).

Each second fixing block 2121 is provided with a second connecting hole 2122 vertically penetrating through the second fixing block 2121, and the second connecting hole 2122 is fixed to the straight bar 1421, so that the straight bar 1421 is fixedly connected to the baffle 212.

Referring to fig. 1, the box mechanism 2 includes a box cover 24, the box cover 24 being disposed parallel to a horizontal plane, the size of the box cover 24 being smaller than that of the base 21.

Referring to fig. 5, a cloth bag 243 is disposed at the center of the box cover 24, the upper end of the cloth bag 243 is wrapped around the feeding tube 4, and a bag tying rope 244 is disposed outside the upper end of the cloth bag 243 to fasten the cloth bag 243 on the feeding tube 4.

Each top rod 14 is provided with a steel wire 143, one end of each steel wire 143 is fixed on one side of the top rod 14 facing the cloth bag 243, the other end of each steel wire 143 is connected with the cloth bag 243, and the cloth bag 243 is suspended through the steel wires 143 so as not to be easily separated from the feeding pipe 4.

Referring to fig. 6, the box mechanism 2 further includes a fixing plate 22 and a box door 23, the fixing plate 22 is vertically disposed between the box cover 24 and the base 21, the number of the fixing plates 22 is three, the upper end of the fixing plate 22 is connected to the box cover 24, and the lower end of the fixing plate 22 is connected to the base 21.

The chamber door 23 is vertically arranged between the chamber cover 24 and the base 21, the upper end of the chamber door 23 is connected with the chamber cover 24 in an abutting mode, the lower end of the chamber door 23 is connected with the base 21 in an abutting mode, the left end and the right end of the chamber door 23 are respectively connected with one fixing plate 22 in an abutting mode, and the three fixing plates 22 and one chamber door 23 jointly form a rectangle.

The side face, close to the box door 23, of the box cover 24 is provided with fourth fixing blocks 241, the number of the fourth fixing blocks 241 is four, the four fourth fixing blocks 241 are divided into two groups, each group of the fourth fixing blocks 241 is arranged at intervals, a fixing rod 232 is arranged between every two fourth fixing blocks 241 of each group, the fixing rod 232 is vertically arranged, the length of the fixing rod 232 is larger than that of the box door 23, and the diameter of the fixing rod 232 is equal to the distance between every two fourth fixing blocks 241 of each group.

The lower end of the box door 23 is provided with a third fixing block 231, the number of the third fixing blocks 231 is four, every two third fixing blocks 231 are in one group, each third fixing block 231 is located under the fourth fixing block 241, the distance between every two third fixing blocks 231 of each group is the diameter of the fixing rod 232, the two third fixing blocks 231 of each group penetrate through the two third fixing blocks 231 through a bolt parallel to the direction of the box door 23, and the two third fixing blocks 231 of each group are rotatably connected with the fixing rod 232 through bolts.

Referring to fig. 7, the upper end of each fixing rod 232 is provided with a thread at a portion higher than the door 23, and the upper end of the fixing rod 232 is provided with a limiting nut 233, the length of the limiting nut 233 being less than the length of the upper end of the fixing rod 232 longer than the door 23.

Two handles 2331 are arranged at the upper end of the limit nut 233, and the handles 2331 are arranged perpendicular to the direction of the limit nut 233 and symmetrically arranged at two sides of the limit nut 233.

When the stopper nut 233 is tightened by rotating the handle 2331, the door 23 is fixedly pressed between the cover 24 and the base 21 when the bottom surface of the stopper nut 233 abuts against the upper surface of the fourth fixing block 241.

Referring to fig. 8, after the limiting nut 233 is screwed outward and separated from the fourth fixing block 241 by a certain distance, the fixing rod 232 is rotated around the bolt between the third fixing blocks 231, so that the door 23 can be drawn out between the lid 24 and the base 21.

Referring to fig. 9, the multistage screening machine for powder objects further comprises a screening mechanism 3, the screening mechanism 3 is arranged inside the box body mechanism 2, and the screening mechanism 3 comprises a screening component 31, a receiving component 32 and a discharging component 33.

The screening assembly 31 includes a first screening plate 311, a second screening plate 312, a third screening plate 313 and a fourth screening plate 314.

The first sieve plate 311, the second sieve plate 312, the third sieve plate 313 and the fourth sieve plate 314 are all arranged in an inclined manner, the inclined angles of the first sieve plate 311, the second sieve plate 312, the third sieve plate 313 and the fourth sieve plate 314 are the same, the first sieve plate 311, the second sieve plate 312, the third sieve plate 313 and the fourth sieve plate 314 are arranged at intervals and are uniformly distributed in the box body mechanism 2, holes penetrating through the sieve plates and uniformly distributed are formed in the first sieve plate 311, the second sieve plate 312, the third sieve plate 313 and the fourth sieve plate 314, the size of the hole in the first sieve plate 311 is larger than that of the hole in the second sieve plate 312, the size of the hole in the second sieve plate 312 is larger than that of the hole in the third sieve plate 313, and the size of the hole in the third sieve plate 313 is larger than that of the hole in the fourth sieve plate 314.

The upper ends of the first, second, third and fourth material sieving plates 311, 312, 313 and 314 are connected to the fixing plate 22 far away from the door 23, and the lower ends of the first, second, third and fourth material sieving plates 311, 312, 313 and 314 are disposed near the door 23 (see fig. 8).

The receiving assembly 32 includes a first receiving plate 321, a second receiving plate 322, a third receiving plate 323 and a fourth receiving plate 324. The first material receiving plate 321, the second material receiving plate 322, the third material receiving plate 323 and the fourth material receiving plate 324 are all obliquely arranged, the oblique angles of the first material receiving plate 321, the second material receiving plate 322, the third material receiving plate 323 and the fourth material receiving plate 324 are the same, and the first material receiving plate 321, the second material receiving plate 322, the third material receiving plate 323 and the fourth material receiving plate 324 are arranged at intervals and are evenly distributed in the box body mechanism 2.

The upper end of the first material receiving plate 321 is close to the box cover 24, the lower end of the first material receiving plate 321 is close to the upper end of the first material sieving plate 311, the upper end of the second material receiving plate 322 is close to the lower end of the first material sieving plate 311, the lower end of the second material receiving plate 322 is close to the upper end of the second material sieving plate 312, the upper end of the third material receiving plate 323 is close to the lower end of the second material sieving plate 312, the lower end of the third material receiving plate 323 is close to the upper end of the third material sieving plate 313, the upper end of the fourth material receiving plate 324 is close to the lower end of the third material sieving plate 313, and.

The blanking assembly 33 includes a first blanking pipe 331, a second blanking pipe 332, a third blanking pipe 333, and a fourth blanking pipe 334, where the first blanking pipe 331, the second blanking pipe 332, the third blanking pipe 333, and the fourth blanking pipe 334 are all disposed on one side close to the door 23, the upper end of the first blanking pipe 331 is disposed at the lower end of the first sieve plate 311, the upper end of the second blanking pipe 332 is disposed at the lower end of the second sieve plate 312, the upper end of the third blanking pipe 333 is disposed at the lower end of the third sieve plate 313, the upper end of the fourth blanking pipe 334 is disposed at the lower end of the fourth sieve plate 314, the lower ends of the first blanking pipe 331, the second blanking pipe 332, the third blanking pipe 333, and the fourth blanking pipe 334 all penetrate through the base 21, and the first blanking pipe 331, the second blanking pipe 332, the third blanking pipe 333, and the fourth blanking pipe 334 are arranged at an interval on one side close to the door 23 (.

The base 21 is further provided with a waste port 2111, the upper end of the waste port 211 is communicated with the upper surface of the base 21, and the lower end of the waste port passes through the base 21.

Referring to fig. 10, the bottom end of the baffle 212 is provided with a bottom plate 211, and the bottom plate 211 is disposed perpendicular to the baffle 212.

Screening mechanism 3 still includes drive assembly 34, and drive assembly 34 includes driving motor 341, and driving motor 341 is vertical to be set up, and the lower extreme of driving motor 341 is fixed on baffle 212, is equipped with drive shaft 3411 on the driving motor 341, and the lower extreme of drive shaft 3411 drives the belt 342 and rotates.

The driving motor 341 further includes an eccentric wheel 343, one end of the eccentric wheel 343 is provided with a rotating shaft 3431, the rotating shaft 3431 penetrates through the eccentric wheel 343, the upper end of the rotating shaft 3431 penetrates through the base plate 211 and the upper end of the rotating shaft 3431 is provided with a fifth fixing block 3432, the size of the fifth fixing block 3432 is larger than the diameter of the rotating shaft 3431, so that the rotating shaft 3431 is not separated from the base plate 211 and is rotatably connected with the base plate 211, the lower end of the rotating shaft 3431 is connected with a belt 342, and the rotating shaft 3431 is driven to rotate by the belt.

The implementation principle of the embodiment is as follows:

the feed enters the box mechanism 2 from the feeding pipe 4 through the cloth bag 243, and the driving shaft 3411 is driven to rotate by the driving motor 341, and the rotating shaft 3431 and the eccentric wheel 343 are driven to rotate by the belt 342, so that the gravity center of the box mechanism 2 is changed.

Because the box body mechanism 2 is fixed with the mandril 14 through the connecting piece 142, the box body mechanism 2 can shake but can not fall off.

After the powder objects enter the box body mechanism 2, the powder objects move due to the vibration of the box body mechanism 2, the powder objects slide to the first material receiving plate 311 through the inclined first material receiving plate 321, slide down through the inclined first material receiving plate 311, the powder objects larger than the size of the holes in the first material receiving plate 311 are left on the first material receiving plate 311 and move to the first blanking pipe 331 along the inclined first material receiving plate 311 to slide out, and the powder objects smaller than the size of the holes in the first material receiving plate 311 fall onto the inclined second material receiving plate 322 through the holes in the first material receiving plate 311.

The powder objects slide to the second material receiving plate 312 through the inclined second material receiving plate 322 and slide down through the inclined second material screening plate 312, the powder objects larger than the size of the holes on the second material screening plate 312 are left on the second material screening plate 312 and move to the second discharging pipe 332 along the inclined second material screening plate 312 to slide out, and the powder objects smaller than the size of the holes on the second material screening plate 312 fall onto the inclined third material receiving plate 323 through the holes on the second material screening plate 312.

The powder objects slide to the third material receiving plate 313 through the inclined third material receiving plate 323 and slide down through the inclined third material screening plate 313, the powder objects larger than the size of the holes in the third material screening plate 313 are left on the third material screening plate 313 and move to the third discharging pipe 333 along the inclined third material screening plate 313 to slide out, and the powder objects smaller than the size of the holes in the third material screening plate 313 fall onto the inclined fourth material receiving plate 324 through the holes in the third material screening plate 313.

The powder objects slide to the fourth material receiving plate 314 through the inclined fourth material receiving plate 324, slide down through the inclined fourth material screening plate 314, are left on the fourth material screening plate 314 and move to the fourth discharging pipe 334 to slide out along the inclined fourth material screening plate 314, and the powder objects smaller than the holes on the fourth material screening plate 314 fall onto the bottom plate 211 through the holes on the fourth material screening plate 314 and move to the waste port 2111 on the bottom plate 211 to be discharged.

The powder objects passing through the first discharging pipe 331 are large waste materials, the powder objects passing through the second discharging pipe 332 are large powder objects, the powder objects passing through the third discharging pipe 333 are medium powder objects, the powder objects passing through the fourth discharging pipe 334 are small powder objects, and the powder objects passing through the waste material opening 2111 are small waste materials.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a multistage sieve separator of powder object which characterized in that: comprises a driving component (34) and a screening mechanism (3), wherein the driving component (34) comprises a driving motor (341), the number of the driving motors (341) is one, the driving assembly (34) also comprises an eccentric wheel (343), the driving motor (341) drives the eccentric wheel (343) to rotate, the eccentric wheel (343) is fixed at the bottom of the screening mechanism (3), when the eccentric wheel (343) rotates, the gravity center of the screening mechanism (3) is driven to shift, so that the screening mechanism (3) shakes, the screening mechanism (3) comprises a plurality of screening components (31), holes with different sizes are arranged on the screening components (31), the sizes of the holes of the screening components (31) from top to bottom are gradually reduced, when the screening components (31) are divided into groups, the hole size of each group of the screening components (31) is gradually reduced.

2. The multi-stage screening machine for powder objects of claim 1, wherein: screening mechanism still including connecing material subassembly (32), it is the same with the quantity of sieve material subassembly (31) to connect the quantity of material subassembly (32), and is a plurality of connect material subassembly (32) parallel arrangement each other, every connect material subassembly (32) to locate and correspond sieve material subassembly (31) top, just a plurality of connect material subassembly (32) to be located a plurality of sieve material subassemblies (31) same projection plane.

3. The multi-stage screening machine for powder objects of claim 2, wherein: connect material subassembly (32) and sieve material subassembly (31) all slope setting, connect material subassembly (32) and sieve material subassembly (31) opposite direction of slope, connect material subassembly (32) lower extreme to be close to sieve material subassembly (31) upper end.

4. The multi-stage screening machine for powder objects of claim 1, wherein: still include box mechanism (2), screening mechanism (3) are located in box mechanism (2).

5. The multi-stage screening machine for powder objects of claim 4, wherein: the box body mechanism (2) comprises a box door (23), a fixing rod (232) is arranged outside the box door (23), the lower end of the fixing rod (232) is rotatably connected with the lower end of the box body mechanism (2), a threaded connection limiting nut (233) is arranged at the upper end of the fixing rod (232), when the fixing rod (232) is vertically placed, the limiting nut (233) is screwed downwards to abut against the upper surface of the box body mechanism (2), the box body mechanism (2) clamps the fixed box door (23), the limiting nut (233) is screwed tightly at the upper end of the fixing rod (232), the lower surface of the limiting nut (233) abuts against the upper surface of the box body mechanism (2), the box door (23) is abutted between the upper end and the lower end of the box body mechanism (2), and the box body (23) is drawn out when the limiting nut (233) is unscrewed.

6. The multi-stage screening machine for powder objects of claim 5, wherein: the limiting nut (233) is provided with a handle (2341), and the handle (2341) is perpendicular to the limiting nut (233) and arranged on the limiting nut (233).

7. The multi-stage screening machine for powder objects of claim 6, wherein: the box body mechanism is characterized by further comprising a fixing mechanism (1), a connecting piece (142) is arranged on the fixing mechanism (1), the upper end of the connecting piece (142) is connected with the fixing mechanism (1), the lower end of the connecting piece (142) is connected with the box body mechanism (2), and the box body mechanism (2) is fixed with the fixing mechanism (1) through the connecting piece (142).

8. The multi-stage screening machine for powder objects of claim 7, wherein: the upper end of the connecting piece (142) is provided with a bent rod (1422), the fixing mechanism (1) further comprises a first fixing block (141), the connecting piece (142) penetrates through the first fixing block (141), and the lower surface of the bent rod (1422) is abutted to the upper surface of the first fixing block (141).

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