CN210233629U

CN210233629U - Vibrating screen for screening plastic particles

Info

Publication number: CN210233629U
Application number: CN201921209379.1U
Authority: CN
Inventors: Xiaojun Tian; 田小军
Original assignee: Shaoxing Shangyu Hongyue Plastic Industry Co Ltd
Current assignee: Shaoxing Shangyu Hongyue Plastic Industry Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-04-03
Anticipated expiration: 2029-07-29

Abstract

The utility model relates to a vibrating screen for screening plastic particles, which belongs to the technical field of vibrating screens and comprises a frame, wherein a plurality of first stand columns are installed on the frame, buffer springs are sleeved on the first stand columns, second stand columns are also sleeved in the buffer springs, a vibrating screen body is installed on the second stand columns, baffles are circumferentially installed on the upper surface of the vibrating screen body, and the vibrating screen body comprises a fine screening mechanism, a finished product screening mechanism and a coarse screening mechanism; the fine screening mechanism comprises a first shell, a fine hole screen is installed on the first shell, a vacuum tube is further installed on the first shell, one end of the vacuum tube is communicated with an inner cavity of the first shell, the other end of the vacuum tube is connected with a vacuum pump, the vacuum pump is installed on the ground on one side of the rack, and a vibration motor is further installed on the side wall of one side of the first shell. The utility model discloses have and to cool off and screen the effect that does not arouse the raise dust to the plastic granules after cutting the grain.

Description

Vibrating screen for screening plastic particles

Technical Field

The utility model belongs to the technical field of the technique of shale shaker and specifically relates to a shale shaker is used in plastic granules screening is related to.

Background

After the plastics granulation is accomplished, cut the grain with rectangular form plastic strip, and cut the grain and accomplish the back, probably have powder, tiny particle piece, rectangular piece etc. and be not conform to the granule of requirement, consequently all need use the shale shaker to screen the plastic granules after cutting the grain after generally cutting the grain is accomplished to the plastic granules who remains required particle diameter, and will not conform to the requirement plastic granules sieve except that the retrieval and utilization.

For example, chinese patent No. CN203004113U discloses a plastic particle vibrating screen, which includes a vibrating screen body having a product inlet, a finished product outlet, and a scrap outlet, wherein the vibrating screen body is provided with an air inlet, and a bottom plate is installed at the air inlet, and the bottom plate is installed with an air blower, and the air outlet of the air blower faces the air inlet of the vibrating screen.

The above prior art solutions have the following drawbacks: in the actual use process, the air volume generated by the air blower is large, plastic particles are easy to blow away, even if the air volume of the air blower is controlled, powder particles and small-particle-size particles mixed in the plastic particles can be blown away by the air blower, so that raised dust is generated, the raised dust not only pollutes the working environment, but also can reduce the service life of equipment when entering the equipment, and after the air volume is reduced, the air convection is reduced, and the cooling effect on the plastic particles is reduced; there is therefore a need for a vibrating screen that can cool and screen plastic granules after granulation without causing dusting.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a shale shaker is used in plastic granules screening, it has can cool off and screen the effect that does not arouse the raise dust to the plastic granules after cutting the grain.

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

a vibrating screen for screening plastic particles comprises a frame, wherein a plurality of first stand columns are installed on the frame, buffer springs are sleeved on the first stand columns, second stand columns are further sleeved in the buffer springs, a vibrating screen body is installed on the second stand columns, baffles are circumferentially installed on the upper surface of the vibrating screen body, the vibrating screen body comprises a fine screening mechanism, a finished product screening mechanism and a coarse screening mechanism which are sequentially arranged along the movement direction of the plastic particles, and the fine screening mechanism, the finished product screening mechanism and the coarse screening mechanism are sequentially connected; the fine screening mechanism comprises a first shell, a fine hole screen is installed on the first shell, a vacuum tube is further installed on the first shell, one end of the vacuum tube is communicated with the inner cavity of the first shell, the other end of the vacuum tube is connected with a vacuum pump, the vacuum pump is installed on the ground on one side of the rack, and a vibration motor is further installed on the side wall on one side of the first shell.

Through adopting above-mentioned technical scheme, vibrating motor can drive whole shale shaker body vibration, and first stand, buffer spring and the second stand of rack installation can not take place to interfere with the frame when making the shale shaker body carry out the vibration screening. At the moment, the plastic granules firstly fall on the fine screen mechanism, and the fine screen can vibrate to screen small-particle-size granules and powdery granules in the plastic granules; meanwhile, the vacuum pump can produce the negative pressure in first casing through the vacuum tube to adsorb granule and powder granule in the plastic pellet through the sieve pore on the fine mesh screen cloth, and in the negative pressure adsorption, the air current of production can cool off the plastic pellet, and can adsorb the raise dust that powder granule formed. The plastic particles passing through the fine screening mechanism enter a finished product screening mechanism, and the finished products are subjected to vibration screening and collection; and finally, the large-particle-size particles and the long blocks enter the coarse screening mechanism to be collected, and in the process, the arrangement of the baffle reduces the possibility that the plastic particles fall off the ground in the vibration process. The plastic particle screening device comprises a fine screening mechanism, a finished product screening mechanism, a coarse screening mechanism, a negative pressure device and a control device, wherein the fine screening mechanism, the finished product screening mechanism and the coarse screening mechanism are arranged on the plastic particle screening device, the fine screening mechanism, the finished product screening mechanism and the coarse screening mechanism are used for respectively screening and collecting powdery particles, small-particle-size particles, long strips, large-particle-size particles and the like in plastic particles, the negative pressure device is used for adsorbing the powdery particles and the small-particle-size particles so as to improve the screening effect, the negative pressure device.

The utility model discloses further set up to: the bottom plate of first casing sets up for the slope, just still install the piece discharging pipe on the bottom plate of first casing, be provided with rubber end cap on the piece discharging pipe.

By adopting the technical scheme, as the general quantity of the powdery particles and the small-particle-size particles is less, when the plastic particles in the first shell are less, the rubber plug is used for plugging the scrap discharge pipe, so that the vacuum degree in the first shell can be improved, and the adsorption force of negative pressure is improved; and when the too much needs clearance of plastic granules in first casing, close the vacuum pump and pull out rubber end cap and can make likepowder granule and small-size granule fall into in the container of preparing along the piece discharging pipe under the effect of gravity.

The utility model discloses further set up to: still install filter unit in the first casing, filter unit includes the filter tube, just the one end of filter tube is located in the cavity of first casing, the other end of filter tube runs through first casing, just the inside cavity of filter tube is linked together with the external world, the filtration pore has been seted up on the week lateral wall of filter tube, slidable mounting has the filter core in the filter tube, the filter core with the vacuum tube links to each other.

By adopting the technical scheme, the possibility that the powdery particles and the particles with small particle sizes enter the vacuum pump through the vacuum tube can be reduced by arranging the filtering component, and the possibility that the vacuum pump is damaged due to entering of impurities is reduced.

The utility model discloses further set up to: the filter core includes the carriage, the both ends of carriage are provided with first separation blade and second separation blade respectively, first separation blade with between the second separation blade the cladding is provided with first filter screen on the carriage, the cladding is provided with the second filter screen of rugosity on the first filter screen, the cladding is provided with the third filter screen on the second filter screen, be provided with the installation pipe on the first separation blade, the installation pipe runs through first separation blade and with the carriage is linked together, the installation pipe is kept away from the one end of first separation blade with the vacuum tube links to each other.

Through adopting above-mentioned technical scheme, the carriage forms the support to first filter screen, second filter screen and third filter screen, and the multi-stage filtration of first filter screen, second filter screen and third filter screen has strengthened the filter effect of filter core, has further reduced the vacuum pump because get into the possibility that debris and damage.

The utility model discloses further set up to: the outer side wall of the first shell is circumferentially provided with a plurality of mounting blocks, a first mounting groove is formed in the mounting block far away from one side of the first shell, a second mounting groove is further formed in the mounting block close to one end of the first shell, the second mounting groove is communicated with the first mounting groove, the first shell is further provided with a cover plate, a plurality of clamping blocks are circumferentially arranged on the circumferential side wall of the cover plate, and the clamping blocks penetrate through the first mounting groove and are in clamping connection with the second mounting groove; the cover plate is also provided with a through hole for the installation pipe to pass through.

By adopting the technical scheme, when the cover plate is installed, the installation pipe penetrates through the through hole, the fixture block is placed in the first installation groove, the fixture block is pushed and rotated, the fixture block is clamped in the second installation groove, and the filter element is blocked in the filter pipe by the cover plate; and the detachable apron makes things convenient for the workman to change the filter core.

The utility model discloses further set up to: the fixture comprises a fixture block and is characterized in that a positioning groove is further formed in the inner side wall of the second mounting groove, a positioning block is further arranged on the side wall of the fixture block, and the positioning block is connected with the positioning groove in a clamping mode.

Through adopting above-mentioned technical scheme, because the shale shaker working process in constantly vibrate, consequently the fixture block and second draw-in groove break away from the joint state because of the vibration easily, and the locating piece and the constant head tank of addding have strengthened the installation stability of apron.

The utility model discloses further set up to: and a buffer gasket is circumferentially arranged on one side of the cover plate, which is close to the first shell.

Through adopting above-mentioned technical scheme, in the use of shale shaker, apron and first casing collision can produce the noise, and the buffer spacer that adds has not only reduced the shale shaker working process in vibrations to the influence of apron, has further strengthened the installation stability of apron, and has reduced the noise that apron and first casing collision produced.

The utility model discloses further set up to: finished product screening mechanism includes the second casing, be provided with the finished product screen cloth in the second casing, the finished product screen cloth with the pore screen cloth links to each other, just the bottom plate of second casing sets up for the slope, still be provided with the finished product discharging pipe on the bottom plate of second casing, the finished product discharging pipe with the inside cavity of second casing is linked together.

Through adopting above-mentioned technical scheme, the finished product of qualified particle diameter falls into the second casing through the finished product screen cloth, because the bottom plate of second casing sets up for the slope, then the finished product can fall into in the finished product discharging pipe under the action of gravity to fall into the container of preparing through the finished product discharging pipe and carry out unified the collection.

The utility model discloses further set up to: and a soft retaining curtain is circumferentially arranged on the finished product discharge pipe far away from one end of the second shell.

Through adopting above-mentioned technical scheme, the initial velocity that has when plastic granules dropped makes it splash easily when rolling out along the finished product discharging pipe, and soft check curtain cushions plastic granules, has reduced the possibility that plastic granules splashes.

The utility model discloses further set up to: the coarse screening mechanism comprises a third shell, a bottom plate of the third shell is obliquely arranged, and a coarse grain discharging pipe is arranged on the third shell.

Through adopting above-mentioned technical scheme, the big particle diameter granule and the rectangular piece of screening finally fall into in the third casing, and because the bottom plate of third casing sets up for the slope, therefore big particle diameter granule and rectangular piece fall into the container of preparing along the coarse grain discharging pipe under the effect of gravity.

To sum up, the utility model discloses a beneficial technological effect does:

1. the plastic particle screening device is characterized in that a fine screening mechanism, a finished product screening mechanism and a coarse screening mechanism are arranged to respectively screen and collect powder particles, small-particle-size particles, long strips, large-particle-size particles and the like in plastic particles, the powder particles and the small-particle-size particles are adsorbed by negative pressure to improve the screening effect, raised dust generated by the powder particles is also adsorbed by the negative pressure, and the generated airflow can dissipate heat of the plastic particles;

2. the possibility of damage to the vacuum pump caused by the fact that powdery particles and small-particle-size particles enter the vacuum pump is reduced by arranging the filtering component;

3. by arranging the three layers of filter screens, the possibility of damage to the vacuum pump caused by the fact that powdery particles and small-particle-size particles enter the vacuum pump is further reduced;

4. the possibility of plastic particles splashing out of the container is reduced by arranging a soft curtain.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

figure 2 is a cross-sectional view of a shaker body of the present invention;

FIG. 3 is an exploded view of the filter element of the present invention;

FIG. 4 is an enlarged partial schematic view of portion A of FIG. 3;

fig. 5 is a schematic structural diagram of the fixture block of the present invention.

In the figure, 1, a frame; 11. a first upright post; 12. a buffer spring; 13. a second upright post; 2. a vibrating screen body; 3. a fine screening mechanism; 31. a first housing; 32. a fine mesh screen; 33. a filter member; 34. a filter tube; 35. a filtration pore; 36. a filter element; 361. a support frame; 362. a first baffle plate; 363. a second baffle plate; 364. installing a pipe; 365. a first filter screen; 366. a second filter screen; 367. a third filter screen; 4. mounting blocks; 41. a first mounting groove; 42. a second mounting groove; 43. a cover plate; 44. a clamping block; 45. a cushion pad; 46. positioning a groove; 47. positioning blocks; 48. a through hole; 51. a vacuum tube; 52. a vacuum pump; 53. a vibration motor; 6. a scrap discharge pipe; 61. a rubber plug; 7. a finished product screening mechanism; 71. a second housing; 72. screening a finished product; 73. a finished product discharge pipe; 74. a curtain; 8. a coarse screening mechanism; 81. a third housing; 82. a coarse grain discharging pipe; 9. and a baffle plate.

Detailed Description

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

As shown in fig. 1 and 2, for the utility model discloses a shale shaker is used in plastic granules screening, including frame 1, six first stands 11 are installed to the upper surface circumference of frame 1, cup joint on the first stand 11 and install buffer spring 12, and second stand 13 has still been cup jointed in the buffer spring 12 in the slip, and the shale shaker body 2 is installed to the one end that frame 1 was kept away from to second stand 13.

The vibrating screen body 2 comprises a fine screen mechanism 3, the fine screen mechanism 3 comprises a first shell 31, a fine-hole screen 32 is installed on the upper surface of the first shell 31, and a filtering part 33 is further installed in the first shell 31.

As shown in fig. 1 and 3, the filter member 33 includes a hollow cylindrical filter tube 34, one end of the filter tube 34 is located in the first housing 31, the other end of the filter tube 34 penetrates through a side wall of the first housing 31, an inner cavity of the filter tube 34 is communicated with the outside, and a filter hole 35 is circumferentially opened on the filter tube 34.

The filter element 36 is slidably mounted in the filter tube 34, the filter element 36 includes a hollow cylindrical support frame 361, a first blocking piece 362 and a second blocking piece 363 are respectively mounted at two ends of the support frame 361, a mounting tube 364 is mounted on the first blocking piece 362, and the mounting tube 364 is communicated with an inner cavity of the support frame 361. A first filter screen 365 is wrapped on the supporting frame 361 between the first blocking piece 362 and the second blocking piece 363, a folded second filter screen 366 is wrapped on the outer side wall of the first filter screen 365, and a third filter screen 367 is wrapped outside the second filter screen 366.

As shown in fig. 1 and 5, four mounting blocks 4 are circumferentially mounted on an outer side wall of the first housing 31, and a first mounting groove 41 is formed on a side wall of the four mounting blocks 4 close to each other. The mounting block 4 of the first mounting groove 41 near one end of the first housing 31 is further provided with a second mounting groove 42, the second mounting groove 42 is communicated with the first mounting groove 41, and the first mounting groove 41 is perpendicular to the second mounting groove 42. The second mounting groove 42 is further provided with a positioning groove 46 on the inner side wall thereof.

As shown in fig. 3 and 4, the first housing 31 is further provided with a cover plate 43, four latch blocks 44 are circumferentially arranged on the peripheral side wall of the cover plate 43 at equal intervals, and the latch blocks 44 pass through the first mounting groove 41 and are in latching connection with the second mounting groove 42; rubber positioning blocks 47 are further arranged on two side walls of the clamping block 44, and the positioning blocks 47 are in clamping connection with the positioning grooves 46. A buffer gasket 45 is further circumferentially installed on one side of the cover plate 43 close to the first shell 31, and the buffer gasket 45 abuts against the outer side wall of the first shell 31. The cover plate 43 is further provided with a through hole 48 through which the mounting tube 364 passes.

As shown in fig. 1 and 2, a soft vacuum tube 51 is connected to the mounting tube 364 outside the first housing 31 by interference fit, and the vacuum tube 51 communicates with the inner cavity of the first housing 31 through the filter element 36. The vacuum pipe 51 is connected to a vacuum pump 52 at an end thereof remote from the mounting pipe 364, and the vacuum pump 52 is mounted on the floor on the side of the frame 1. The outer side wall of the first shell 31 far away from the vacuum tube 51 is also fixedly provided with a vibration motor 53.

The bottom plate of first casing 31 is the slope setting, and still is provided with piece discharging pipe 6 on the bottom plate of first casing 31, and piece discharging pipe 6 is linked together with the inside cavity of first casing 31, and is provided with rubber end cap 61 on the piece discharging pipe 6.

The vibrating screen body 2 further comprises a finished product screening mechanism 7, the finished product screening mechanism 7 comprises a second shell 71, one side, close to the first shell 31, of the second shell 71 is fixedly connected with the first shell 31, and the upper surface of the first shell 31 and the upper surface of the second shell 71 are located on the same plane. The finished screen 72 is installed on the upper surface of the second housing 71, the aperture of the finished screen 72 is larger than that of the fine mesh 32, and the finished screen 72 is connected to the fine mesh 32. The bottom plate of the second shell 71 is obliquely arranged, a finished product discharge pipe 73 is arranged on the bottom plate of the second shell 71, and the finished product discharge pipe 73 is communicated with the inner cavity of the second shell 71. A soft curtain 74 is circumferentially installed on the finished product discharge pipe 73 at the end far away from the second shell 71.

The vibrating screen body 2 further comprises a coarse screening mechanism 8, the coarse screening mechanism 8 comprises a third shell 81, one end, close to the second shell 71, of the third shell 81 is fixedly connected with the second shell 71, and the upper surface of the third shell 81 and the upper surface of the second shell 71 are located on the same plane. The bottom plate of the third housing 81 is inclined, and a coarse particle discharge pipe 82 is arranged on the bottom plate of the third housing 81, and the coarse particle discharge pipe 82 is communicated with the inner cavity of the third housing 81.

The upper surface of the vibrating screen body 2 is also circumferentially provided with a baffle 9 for blocking plastic particles.

The implementation principle of the embodiment is as follows:

since the vibration motor 53 is installed on the first housing 31, the vibration amplitude of the first housing 31 is maximized, and the vibration amplitudes of the second housing 71 and the third housing 81 are sequentially decreased, so that after the plastic granules after the completion of the granulation are placed on the fine-mesh screen 32, the plastic granules move along the fine-mesh mechanism 3, the finished-product sieving mechanism 7, and the coarse-mesh mechanism 8 in this order. The first upright post 11, the buffer spring 12 and the second upright post 13 mounted on the frame 1 do not interfere with the frame 1 when the vibrating screen body 2 performs vibrating screening.

Then the plastic particles are placed on the fine screen mechanism 3, and the fine screen 32 can vibrate to screen the small-particle-size particles and the powdery particles in the plastic particles; meanwhile, the vacuum pump 52 generates a negative pressure in the first housing 31 through the vacuum pipe 51, and adsorbs small-sized particles and powder particles in the plastic particles through the mesh holes of the fine mesh 32, and the generated air flow cools the plastic particles and adsorbs dust formed by the powder particles while the negative pressure adsorption is performed.

In the process, the supporting frame 361 supports the first filter screen 365, the second filter screen 366 and the third filter screen 367, and the multistage filtering of the first filter screen 365, the second filter screen 366 and the third filter screen 367 enhances the filtering effect of the filter element 36, reduces the possibility that powder particles and small-particle-size particles enter the vacuum pump 52 through the vacuum pipe 51, and reduces the possibility that the vacuum pump 52 is damaged due to entering impurities. The powdery particles and small-sized particles are adsorbed and remain in the inner cavity of the first housing 31.

Because the general quantity of the powder particles and the small-particle-size particles is less, when the quantity of the plastic particles in the first shell 31 is less, the rubber plug 61 is used for plugging the scrap discharge pipe 6, so that the vacuum degree in the first shell 31 can be improved, and the adsorption force of negative pressure is improved; when too many plastic particles in the first shell 31 need to be cleaned, the vacuum pump 52 is closed and the rubber plug 61 is pulled down, so that the powdery particles and the small-particle-size particles can fall into the prepared container along the obliquely arranged bottom plate and the debris discharge pipe 6 under the action of gravity.

The plastic granules after the fine screening mechanism 3 enter the finished product screening mechanism 7 again, the finished products with qualified particle sizes fall into the second shell 71 through the finished product screen 72, and because the bottom plate of the second shell 71 is obliquely arranged, the finished products fall into the finished product discharge pipe 73 under the action of gravity and fall into a prepared container through the finished product discharge pipe 73 for uniform collection. The initial speed of the plastic particles when falling enables the plastic particles to easily splash out of the container when rolling out along the finished product discharge pipe 73, and the soft curtain 74 buffers the plastic particles, so that the possibility of plastic particle splashing is reduced; and when the container for containing the plastic particles needs to be replaced, the finished product discharge pipe 73 can be closed only by tightening the retaining curtain 74.

And finally, the large-particle-size particles and the long-strip blocks enter the coarse screening mechanism 8, the large-particle-size particles and the long-strip blocks fall into the third shell 81, and the large-particle-size particles and the long-strip blocks fall into a prepared container along the coarse particle discharging pipe 82 under the action of gravity because the bottom plate of the third shell 81 is obliquely arranged.

In the above process, the provision of the baffles 9 reduces the likelihood of plastic particles falling to the ground during vibration.

When the filter element 36 needs to be replaced, the vacuum tube 51 which is arranged on the mounting tube 364 in an interference fit mode is firstly taken down; then, the cover plate 43 is rotated to separate the latch 44 from the second latch, so that the positioning block 47 and the positioning slot 46 are separated from the latching state, and the cover plate 43 is pulled to move the latch 44 along the first latch, so that the cover plate 43 can be removed and the filter element 36 can be taken out for replacement.

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

1. The utility model provides a shale shaker is used in plastic granules screening, includes frame (1), its characterized in that: the plastic particle screening machine is characterized in that a plurality of first stand columns (11) are installed on the rack (1), buffer springs (12) are sleeved on the first stand columns (11), second stand columns (13) are further sleeved in the buffer springs (12), a vibrating screen body (2) is installed on the second stand columns (13), baffles (9) are installed on the upper surface of the vibrating screen body (2) in the circumferential direction, the vibrating screen body (2) comprises a fine screening mechanism (3), a finished product screening mechanism (7) and a coarse screening mechanism (8) which are sequentially arranged along the movement direction of plastic particles, and the fine screening mechanism (3), the finished product screening mechanism (7) and the coarse screening mechanism (8) are sequentially connected; the fine screen mechanism (3) comprises a first shell (31), a fine screen (32) is installed on the first shell (31), a vacuum tube (51) is further installed on the first shell (31), one end of the vacuum tube (51) is communicated with an inner cavity of the first shell (31), a vacuum pump (52) is connected to the other end of the vacuum tube (51), the vacuum pump (52) is installed on the ground on one side of the rack (1), and a vibration motor (53) is further installed on the side wall of one side of the first shell (31).

2. The vibrating screen for screening plastic granules of claim 1, wherein: the bottom plate of first casing (31) sets up for the slope, just still install piece discharging pipe (6) on the bottom plate of first casing (31), be provided with rubber end cap (61) on piece discharging pipe (6).

3. The vibrating screen for screening plastic granules of claim 1, wherein: still install filter part (33) in first casing (31), filter part (33) include filter tube (34), just the one end of filter tube (34) is located in the cavity of first casing (31), the other end of filter tube (34) runs through first casing (31), just the inside cavity of filter tube (34) is linked together with the external world, filter hole (35) have been seted up on the week lateral wall of filter tube (34), slidable mounting has filter core (36) in filter tube (34), filter core (36) with vacuum tube (51) link to each other.

4. The vibrating screen for screening plastic granules of claim 3, wherein: filter core (36) include braced frame (361), the both ends of braced frame (361) are provided with first separation blade (362) and second separation blade (363) respectively, first separation blade (362) with between second separation blade (363) the cladding is provided with first filter screen (365) on braced frame (361), the cladding is provided with folded form second filter screen (366) on first filter screen (365), the cladding is provided with third filter screen (367) on second filter screen (366), be provided with installation pipe (364) on first separation blade (362), installation pipe (364) run through first separation blade (362) and with braced frame (361) are linked together, installation pipe (364) are kept away from the one end of first separation blade (362) with vacuum tube (51) link to each other.

5. The vibrating screen for screening plastic granules of claim 4, wherein: the outer side wall of the first shell (31) is circumferentially provided with a plurality of mounting blocks (4), the mounting block (4) far away from one side of the first shell (31) is provided with a first mounting groove (41), the mounting block (4) at one end, close to the first shell (31), of the first mounting groove (41) is further provided with a second mounting groove (42), the second mounting groove (42) is communicated with the first mounting groove (41), the first shell (31) is further provided with a cover plate (43), the circumferential side wall of the cover plate (43) is circumferentially provided with a plurality of clamping blocks (44), and the clamping blocks (44) penetrate through the first mounting groove (41) and are in clamping connection with the second mounting groove (42); the cover plate (43) is also provided with a through hole (48) for the installation pipe (364) to pass through.

6. The vibrating screen for screening plastic granules of claim 5, wherein: a positioning groove (46) is further formed in the inner side wall of the second mounting groove (42), a positioning block (47) is further arranged on the side wall of the clamping block (44), and the positioning block (47) is connected with the positioning groove (46) in a clamping mode.

7. The vibrating screen for screening plastic granules of claim 6, wherein: and a buffer gasket (45) is circumferentially arranged on one side, close to the first shell (31), of the cover plate (43).

8. The vibrating screen for screening plastic granules of claim 1, wherein: finished product screening mechanism (7) include second casing (71), be provided with finished product screen cloth (72) in second casing (71), finished product screen cloth (72) with pore screen cloth (32) link to each other, just the bottom plate of second casing (71) sets up for the slope, still be provided with finished product discharging pipe (73) on the bottom plate of second casing (71), finished product discharging pipe (73) with the inside cavity of second casing (71) is linked together.

9. The vibratory screen for screening plastic granules of claim 8, wherein: a soft curtain (74) is also circumferentially arranged on the finished product discharge pipe (73) far away from one end of the second shell (71).

10. The vibrating screen for screening plastic granules of claim 1, wherein: the coarse screening mechanism (8) comprises a third shell (81), a bottom plate of the third shell (81) is arranged in an inclined mode, and a coarse grain discharging pipe (82) is arranged on the third shell (81).