CN212493934U

CN212493934U - Vibration screening device for cellulose production

Info

Publication number: CN212493934U
Application number: CN202021094641.5U
Authority: CN
Inventors: 张文会
Original assignee: Nanjing Liangyou Chemical Co ltd
Current assignee: Nanjing Liangyou Chemical Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-02-09
Anticipated expiration: 2030-06-12

Abstract

The utility model provides a cellulose is vibratory screening device for production, relate to cellulose production facility technical field, including the screening box, be provided with the baffle perpendicularly on the bottom surface in the screening box, and the inside that the baffle will screen the box falls into left cavity and right cavity, be provided with first cylinder on the inside wall of left cavity, be provided with the dust catcher on the bottom surface in the left cavity, be provided with the dust absorption pipeline on the dust catcher, the one end and the dust catcher of dust absorption pipeline are connected, the other end of dust absorption pipeline runs through the baffle and is linked together with right cavity, a lateral wall of right cavity is the opening form, the activity is provided with the dodge gate of shape looks adaptation on the lateral wall opening of right cavity, top-down has set gradually workbin and shale shaker device in the right cavity, fixed connection between the piston rod of first cylinder and the lateral wall. The utility model has the advantages of can effectually screen the dust or the tiny particle impurity that mix with in the cellulose raw materials granule, and be favorable to clearing up after the screening.

Description

Vibration screening device for cellulose production

Technical Field

The utility model relates to a cellulose production facility technical field, concretely relates to vibration screening device is used in cellulose production.

Background

Cellulose is used as a basic chemical raw material, and the demand amount of the cellulose is large. At present, cellulose raw material particles need to be added into a reaction kettle in a circulating manner in the cellulose production process, and due to the fact that dust or small particle impurities can be mixed in the cellulose raw material particles, the particle sizes of the cellulose raw material particles are not uniform, and have large differences, the subsequent reaction effect is easily influenced, or the quality of cellulose is easily influenced. The method also comprises the step of screening the cellulose raw material particles by using a vibrating screen, but after screening, impurity dust or small particle impurities clamped in meshes of the vibrating screen are not easy to clean, and the next screening operation is influenced.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a cellulose production vibrating screen device with can effectually screen out the dust or the tiny particle impurity that mix with in the cellulose raw materials granule, and be favorable to clearing up after the screening.

In order to solve the technical problem, the utility model provides a vibration screening device for cellulose production, which comprises a screening box body, wherein a baffle is vertically arranged on the bottom surface in the screening box body, the baffle divides the interior of the screening box body into a left cavity and a right cavity, a first air cylinder is arranged on the inner side wall of the left cavity, a dust collector is arranged on the bottom surface in the left cavity, a dust suction pipeline is arranged on the dust collector, one end of the dust suction pipeline is connected with the dust collector, the other end of the dust suction pipeline penetrates through the baffle and is communicated with the right cavity, one side wall of the right cavity is in an open shape, a movable door with a matched shape is movably arranged on the opening of the side wall of the right cavity, a transparent observation window is arranged on the movable door, a material box and a vibration screen device are sequentially arranged in the right cavity from top to bottom, a piston rod of the first air cylinder is, the length direction of the chute is the same as the motion direction of a piston rod of the first air cylinder, slide rods are fixedly arranged on opposite outer side walls of the material box and are respectively positioned in the chutes at corresponding positions, the vibrating screen device comprises a filter material screen and a vibrating screen, the filter material screen and the vibrating screen are sequentially arranged from top to bottom, the other end of the dust absorption pipeline corresponds to the position between the bottom surface of the material box and the filter material screen, rotating shafts are fixedly arranged on opposite outer walls of the filter material screen, the filter material screen is rotatably arranged on the inner wall of the right cavity through the rotating shafts, a rotating motor is fixedly arranged on the outer wall of the right cavity, an output shaft of the rotating motor is fixedly connected with one of the rotating shafts, two vibrating prop grooves are arranged at two ends of the bottom surface of the filter material screen in parallel, the vibrating screen comprises a second air cylinder, the second air cylinder is fixedly arranged on the bottom surface in, the top surface of the vibration outer frame body is in an opening shape, the material receiving frame is movably arranged in the vibration outer frame body, a plurality of vibration top columns are oppositely arranged on two sides of the top surface of the vibration outer frame body, and the vibration top columns correspond to two vibration top column grooves in position.

Preferably, the workbin is open-ended box structure for top surface and bottom surface, and the opposition is provided with left stock guide and right stock guide in the bottom surface opening of workbin, and parallel interval sets up between left stock guide and the right stock guide, and the cross-section of left stock guide and right stock guide is right angled triangle, and the bottom surface of left stock guide, right stock guide and the bottom surface of workbin all are on same plane, and the setting of left stock guide and right stock guide is favorable to keeping the material smooth and easy that flows when unloading from the workbin.

Preferably, the filter material sieve comprises a rectangular outer frame body, a rotating shaft is fixedly arranged on the opposite outer wall of the rectangular outer frame body, the rectangular outer frame body is rotatably arranged on the inner wall of the right cavity body through the rotating shaft, two vibrating top column grooves are respectively arranged at two ends of the bottom surface of the rectangular outer frame body in parallel, a rectangular inner sieve frame is movably arranged in the rectangular outer frame body, the rectangular inner sieve frame corresponds to the position between the left guide plate and the right guide plate, the size of the rectangular inner sieve frame is matched with that of the rectangular outer frame body, a plurality of connecting springs are arranged on the opposite outer wall of the rectangular inner sieve frame, two ends of each connecting spring are respectively and fixedly connected with the outer wall of the rectangular inner sieve frame and the inner wall of the rectangular outer frame body, the two vibrating top column grooves are respectively arranged at two ends of the bottom surface of the rectangular inner sieve frame, when the second cylinder pushes the vibrating outer frame body to move towards the direction of the rectangular inner sieve, because be connected through coupling spring between reel and the rectangle outer frame body in the rectangle, can be with reel jack-up in the rectangle, when the piston rod of second cylinder drove the vibration fore-set and withdrawed, the reel fell under the action of gravity in the rectangle, and reciprocating motion is so such to the piston rod of second cylinder, can be so vibrations about the reel realization in the rectangle to can filter the material.

Preferably, the vibrating top column comprises a movable column body, one end of the movable column body movably penetrates into the top surface of the vibrating outer frame body, the other end of the movable column body is fixedly provided with a hemispheroid, the hemisphere corresponds to the vibration top column groove, a buffer spring is sleeved outside the other end of the movable column body, and two ends of the buffer spring are respectively and fixedly connected with the hemispheroid and the top surface of the vibrating outer frame body, when the second cylinder pushes the vibrating outer frame body to move towards the direction of the rectangular inner sieve frame, when the hemispheroid is jacked to the vibrating top column groove, the hemispheroid compresses the buffer spring and compresses one end of the movable column body into the top surface of the vibrating outer frame body, because be connected through connecting spring between reel and the rectangle outer frame body in the rectangle, can be with reel jack-up in the rectangle, buffer spring's setting can play the cushioning effect when contacting between hemisphere and vibration support pillar groove.

Preferably, the opposition outer wall of rectangle outer frame body contacts with the opposition inner wall of right cavity respectively, and the distance between the bottom surface of axis of rotation to workbin is greater than half of the length of rectangle outer frame body, is convenient for rotate the motor and drives the upset of filter material sieve, can empty the material in the filter material sieve to connect the material frame in collect.

Preferably, the hemispheroid is made of rubber materials, and the hemispheroid and the vibration top column groove play a good buffering role when in contact.

The utility model has the advantages that:

(1) the cellulose raw material particles pass through the vibrating screen device, so that dust or small particle impurities mixed in the cellulose raw material particles can be effectively screened out, the uniform particle size of the cellulose raw material particles is favorably maintained, the subsequent processing reaction is favorably realized, and the inferior yield can be reduced;

(2) when the cellulose raw material particles are fed, the cellulose raw material particles are pushed by the first air cylinder to move in the sliding chute in a reciprocating mode, so that the feeding of the cellulose raw material particles is smooth, the cellulose raw material particles can uniformly fall into the rectangular inner screen frame, the accumulation is not easy to generate, and the screening effect is improved;

(3) the rotating motor can drive the filter screen to turn over, so that on one hand, the screened cellulose raw material particles in the filter screen are convenient to dump into the material receiving frame for collection; on the other hand also is convenient for after the screening, overturn the filter material sieve, and the piston rod of rethread second cylinder promotes the shale shaker, clears away the dust or the tiny particle impurity of filter material sieve upper adhesion easily.

Drawings

The accompanying drawings are included to provide a preferred understanding of the present invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of a vibratory screening apparatus for cellulose production according to the present invention;

fig. 2 is a schematic position diagram of a dust collector of the vibration screening device for cellulose production according to the present invention;

fig. 3 is a schematic view showing the positions of a left material guide plate and a right material guide plate of the vibration screening device for cellulose production according to the present invention;

FIG. 4 is a schematic diagram of a filtering material sieve of the vibrating sieving device for cellulose production according to the present invention;

fig. 5 is a schematic diagram of a position of a vibrating jack post groove of the vibrating screening device for cellulose production of the present invention;

fig. 6 is a schematic structural view of a vibrating screen of the vibrating screening device for cellulose production of the present invention;

the reference signs are: 1. screening the box body; 11. a partition plate; 12. a left cavity; 121. a first cylinder; 122. a dust collector; 1221. a dust collection duct; 123. a slide bar; 13. a right cavity; 131. a movable door; 132. a transparent viewing window; 2. a material box; 21. a chute; 22. a left stock guide; 23. a right stock guide plate; 3. a vibrating screen device; 31. screening the filter material; 311. a rectangular outer frame body; 312. a rectangular inner screen frame; 313. a connecting spring; 32. vibrating screen; 321. a second cylinder; 322. vibrating the outer frame; 323. a material receiving frame; 324. vibrating the top pillar; 3241. a movable column; 3242. a hemisphere; 3243. a buffer spring; 33. a rotating shaft; 34. rotating the motor; 35. and vibrating the jack post groove.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-6, a vibratory screening apparatus for cellulose production according to this embodiment includes a screening box 1, a partition 11 is vertically disposed on a bottom surface in the screening box 1, the inside of the screening box 1 is divided into a left chamber 12 and a right chamber 13 by the partition 11, a first air cylinder 121 is disposed on an inner sidewall of the left chamber 12, a dust collector 122 is disposed on the bottom surface in the left chamber 12, a dust suction pipe 1221 is disposed on the dust collector 122, one end of the dust suction pipe 1221 is connected to the dust collector 122, the other end of the dust suction pipe 1221 penetrates through the partition 11 and is communicated with the right chamber 13, one sidewall of the right chamber 13 is open, a movable door 131 with a matched shape is movably disposed on an opening of the sidewall of the right chamber 13, a transparent observation window 132 is disposed on the movable door 131, a bin 2 and a vibratory screen apparatus 3 are sequentially disposed in the right chamber 13 from top to bottom, a piston rod of the first air cylinder 121 is fixedly connected to an, the inner wall of the top of the right cavity 13 is oppositely provided with a chute 21, the length direction of the chute 21 is the same as the movement direction of a piston rod of the first air cylinder 121, the opposite outer side wall of the material box 2 is fixedly provided with a slide rod 123, the slide rods 123 are respectively positioned in the chutes 21 at corresponding positions, the vibrating screen device 3 comprises a filter material screen 31 and a vibrating screen 32, the filter material screen 31 and the vibrating screen 32 are sequentially arranged from top to bottom, the other end of the dust suction pipeline 1221 corresponds to the position between the bottom surface of the material box 2 and the filter material screen 31, the opposite outer wall of the filter material screen 31 is fixedly provided with a rotating shaft 33, the filter material screen 31 is rotatably arranged on the inner wall of the right cavity 13 through the rotating shaft 33, the outer wall of the right cavity 13 is fixedly provided with a rotating motor 34, the output shaft of the rotating motor 34 is fixedly connected with one rotating shaft 33, the vibrating screen 32 comprises a second cylinder 321, the second cylinder 321 is fixedly arranged on the bottom surface of the right cavity 13, a vibrating outer frame body 322 is fixedly arranged on a piston rod of the second cylinder 321, the top surface of the vibrating outer frame body 322 is in an open shape, a material receiving frame 323 is movably arranged in the vibrating outer frame body 322, a plurality of vibrating top pillars 324 are oppositely arranged on two sides of the top surface of the vibrating outer frame body 322, and the vibrating top pillars 324 correspond to the positions of the two vibrating top pillar grooves 35.

The feed box 2 is a box structure with an open top and a open bottom, a left material guide plate 22 and a right material guide plate 23 are oppositely arranged in the open bottom of the feed box 2, the left material guide plate 22 and the right material guide plate 23 are arranged in parallel at intervals, the sections of the left material guide plate 22 and the right material guide plate 23 are right triangles, the bottom surfaces of the left material guide plate 22 and the right material guide plate 23 and the bottom surface of the feed box 2 are all on the same plane, the arrangement of the left material guide plate 22 and the right material guide plate 23 is beneficial to keeping smooth flowing of materials fed from the feed box 2, the filter material sieve 31 comprises a rectangular outer frame body 311, a rotating shaft 33 is fixedly arranged on the opposite outer wall of the rectangular outer frame body 311, the rectangular outer frame body 311 is rotatably arranged on the inner wall of the right cavity 13 through the rotating shaft 33, two vibrating top column grooves 35 are respectively arranged at two ends of the bottom surface of the rectangular outer frame body 311, the rectangular inner screen frame 312 corresponds to the left and

right guide plates

22 and 23, the size of the rectangular inner screen frame 312 is matched with the size of the rectangular outer frame 311, the opposite outer walls of the rectangular inner screen frame 312 are provided with a plurality of connecting springs 313, the two ends of each connecting spring 313 are respectively fixedly connected with the outer wall of the rectangular inner screen frame 312 and the inner wall of the rectangular outer frame 311, two vibrating top column grooves 35 are respectively arranged at the two ends of the bottom surface of the rectangular inner screen frame 312, when the second cylinder 321 pushes the vibrating outer frame 322 to move towards the rectangular inner screen frame 312, when the hemisphere 3242 is jacked into the vibrating top column groove 35, the rectangular inner screen frame 312 can be jacked up due to the connection between the rectangular inner screen frame 312 and the rectangular outer frame 311 through the connecting springs 313, when the piston rod of the second cylinder 321 drives the vibrating top column 324 to retract, the rectangular inner screen frame 312 falls under the action of gravity, and the piston rod of the second cylinder 321 reciprocates like, the vibrating top column 324 comprises a movable column 3241, one end of the movable column 3241 movably penetrates into the top surface of the vibrating outer frame 322, the other end of the movable column 3241 is fixedly provided with a hemisphere 3242, the hemisphere 3242 corresponds to the vibrating top column groove 35, the outside of the other end of the movable column 3241 is further sleeved with a buffer spring 3243, two ends of the buffer spring 3243 are respectively and fixedly connected with the hemisphere 3242 and the top surface of the vibrating outer frame 322, when the second cylinder 321 pushes the vibrating outer frame 322 to move towards the direction of the rectangular inner frame 312, after the hemisphere 3242 is lifted to the vibrating top column groove 35, the hemisphere 3242 compresses the buffer spring 3243 and one end of the movable column 3241 into the top surface of the vibrating outer frame 322, because the rectangular inner frame 312 and the rectangular outer frame 311 are connected through a connecting spring 313, can jack up screen frame 312 in the rectangle, buffer spring 3243's setting can play the cushioning effect when contacting between hemisphere 3242 and vibration fore-set groove 35, the opposition outer wall of rectangle outer frame body 311 contacts with the opposition inner wall of right cavity 13 respectively, and the distance between axis of rotation 33 to the bottom surface of workbin 2 is greater than half of the length of rectangle outer frame body 311, be convenient for rotate motor 34 and drive filter material sieve 31 upset, can empty the material in the filter material sieve 31 and collect in connecing the material frame 323, hemisphere 3242 is made for rubber materials, play better cushioning effect when contacting between hemisphere 3242 and the vibration fore-set groove 35.

The utility model discloses a theory of operation is: the second air cylinder 321 is started first, the piston rod of the second air cylinder 321 pushes the vibrating outer frame body 322 to move towards the filter material sieve 31, when the hemisphere 3242 is lifted to contact with the vibrating top column grooves 35 at two ends of the bottom surface of the rectangular inner sieve frame 312, at this time, the hemisphere 3242 compresses the buffer spring 3243 and compresses one end of the movable column 3241 into the top surface of the vibrating outer frame 322, as the vibrating outer frame body 322 is pushed by the piston rod of the second air cylinder 321, the rectangular inner sieve frame 312 can be lifted up due to the connection between the rectangular inner sieve frame 312 and the rectangular outer frame body 311 through the connection spring 313, the arrangement of the buffer spring 3243 can play a buffer role when the hemisphere 3242 contacts with the vibrating top column groove 35, when the rectangular inner sieve frame 312 is lifted up from the rectangular outer frame 311, the rectangular inner sieve frame 312 and the rectangular outer frame body 311 are connected through the connection spring 313, so that the rectangular inner sieve frame 312 can be lifted up to the upper position in the rectangular outer frame body 311, when the piston rod of the second cylinder 321 drives the vibrating outer frame 322 and the vibrating top column 324 to retract simultaneously, when the vibrating top column 324 is not in contact with the vibrating top column groove 35, the rectangular inner screen frame 312 falls under the action of gravity, and in the state that the piston rod of the second cylinder 321 reciprocates, the rectangular inner screen frame 312 is connected with the rectangular outer frame 311 through the connecting spring 313, so that the rectangular inner screen frame 312 vibrates up and down in the rectangular outer frame 311, and cellulose raw material particles in the rectangular inner screen frame 312 can be subjected to vibrating screening; the amplitude of the vibration of the rectangular inner screen frame 312 can be adjusted by adjusting the movement distance of the piston rod of the second air cylinder 321; cellulose raw material particles are added into the material box 2, the cellulose raw material particles can be fed into the rectangular inner screen frame 312 through a gap between the left material guide plate 22 and the right material guide plate 23 at the bottom in the material box 2, the cellulose raw material particles in the rectangular inner screen frame 312 are screened by matching with the movement of the second air cylinder 321, that is, smaller cellulose raw material particles can fall into the material receiving frame 323 through the rectangular inner screen frame 312, the cellulose raw material particles which are not screened out stay in the rectangular inner screen frame 312, after the cellulose raw material particles are added into the material box 2, the first air cylinder 121 can be started, the first air cylinder 121 pushes the material box 2 to reciprocate, the material box 2 can move back and forth in the chute 21 through the slide rod 123, which is beneficial to keeping smooth blanking of cellulose raw material particles through the gap between the left material guide plate 22 and the right material guide plate 23 at the bottom in the material box 2; meanwhile, cellulose raw material particles in the material box 2 can uniformly fall into the rectangular inner screen frame 312, so that accumulation is not easy to generate, and the screening effect is improved; dust-like substances mixed in the cellulose raw material particles generated when the cellulose raw material particles are screened or when the cellulose raw material particles are discharged from the hopper 2 can enter the dust collector 122 through the dust collection pipe 1221; after the screening operation is finished, the dust collector 122, the first air cylinder 121 and the second air cylinder 321 are stopped, the vibrating outer frame body 322 is located at a position far away from the rectangular outer frame body 311 under the driving of the second air cylinder 321, the material receiving frame 323 is taken out of the vibrating outer frame body 322, smaller cellulose raw material particles collected in the material receiving frame 323 can be processed, meanwhile, the material receiving frame 323 which is not filled with materials can be placed in the vibrating outer frame body 322, the rotating motor 34 is started to drive the filter material screen 31 to turn over, the screened cellulose raw material particles in the filter material screen 31 can be poured into the material receiving frame 323 to be collected, and then the cellulose raw material particles are taken out; or after the screening operation is finished, the rotating motor 34 is started to drive the filter screen 31 to turn over, so that the opening of the rectangular inner screen frame 312 faces the material receiving frame 323, the second air cylinder 321 is started to push the vibrating outer frame body 322 to reciprocate, and dust or small particle impurities adhered to the rectangular inner screen frame 312 can be removed when the rectangular inner screen frame 312 vibrates; the vibration outer frame body 322 and the material receiving frame 323 can be connected through the outer part of the vibration outer frame body 322 by using detachable bolts or other detachable connecting pieces, the stability is improved, and the bolts or other detachable connecting pieces can be directly detached when the material receiving frame 323 needs to be taken out of the vibration outer frame body 322.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a cellulose production is with vibration screening device which characterized in that: comprises a screening box body (1), a partition board (11) is vertically arranged on the bottom surface in the screening box body (1), the inside of the screening box body (1) is divided into a left cavity (12) and a right cavity (13) by the partition board (11), a first air cylinder (121) is arranged on the inner side wall of the left cavity (12), a dust collector (122) is arranged on the bottom surface in the left cavity (12), a dust suction pipeline (1221) is arranged on the dust collector (122), one end of the dust suction pipeline (1221) is connected with the dust collector (122), the other end of the dust suction pipeline (1221) penetrates through the partition board (11) and is communicated with the right cavity (13), one side wall of the right cavity (13) is in an open shape, a movable door (131) with a matched shape is movably arranged on the side wall opening of the right cavity (13), a transparent observation window (132) is arranged on the movable door (131), a material box (2) and a vibrating screen device (3) are sequentially arranged in the, the piston rod of the first cylinder (121) is fixedly connected with the outer side wall of the material box (2), a chute (21) is oppositely arranged on the inner wall of the top of the right cavity (13), the length direction of the chute (21) is the same as the movement direction of the piston rod of the first cylinder (121), slide rods (123) are fixedly arranged on the opposite outer side walls of the material box (2), the slide rods (123) are respectively positioned in the chutes (21) at corresponding positions, the vibrating screen device (3) comprises a filtering screen (31) and a vibrating screen (32), the filtering screen (31) and the vibrating screen (32) are sequentially arranged from top to bottom, the other end of the dust suction pipeline (1221) corresponds to the position between the bottom surface of the material box (2) and the filtering screen (31), a rotating shaft (33) is fixedly arranged on the opposite outer wall of the filtering screen (31), and the filtering screen (31) is rotatably arranged on the inner wall of the right cavity (13) through the rotating shaft, the outer wall of the right cavity (13) is fixedly provided with a rotating motor (34), an output shaft of the rotating motor (34) is fixedly connected with one rotating shaft (33), two vibrating top column grooves (35) are arranged at two ends of the bottom surface of the filter material sieve (31) in parallel, the vibrating sieve (32) comprises a second air cylinder (321), the second air cylinder (321) is fixedly arranged on the bottom surface of the right cavity (13), a vibrating outer frame body (322) is fixedly arranged on a piston rod of the second air cylinder (321), the top surface of the vibrating outer frame body (322) is in an open shape, a material receiving frame (323) is movably arranged in the vibrating outer frame body (322), a plurality of vibrating top columns (324) are oppositely arranged on two sides of the top surface of the vibrating outer frame body (322), and the vibrating top columns (324) correspond to the positions of the two vibrating top column grooves (35).

2. The vibratory screening apparatus for cellulose production according to claim 1, wherein: the feed box (2) is open-ended box structure for top surface and bottom surface, and the bottom surface opening of feed box (2) is interior to be provided with left stock guide (22) and right stock guide (23) oppositely, and parallel interval sets up between left stock guide (22) and the right stock guide (23), and the cross-section of left stock guide (22) and right stock guide (23) is right angled triangle, and the bottom surface of left stock guide (22), right stock guide (23) and the bottom surface of feed box (2) all are on same plane.

3. The vibratory screening apparatus for cellulose production according to claim 2, wherein: the filter screen (31) comprises a rectangular outer frame body (311), a rotating shaft (33) is fixedly arranged on the opposite outer wall of the rectangular outer frame body (311), the rectangular outer frame body (311) is rotatably arranged on the inner wall of the right cavity (13) through the rotating shaft (33), two vibrating strut troughs (35) are respectively arranged at two ends of the bottom surface of the rectangular outer frame body (311) in parallel, a rectangular inner screen frame (312) is movably arranged in the rectangular outer frame body (311), the rectangular inner screen frame (312) corresponds to the positions between the left material guide plate (22) and the right material guide plate (23), the size of the rectangular inner screen frame (312) is matched with that of the rectangular outer frame body (311), a plurality of connecting springs (313) are arranged on the opposite outer wall of the rectangular inner screen frame (312), and two ends of the connecting springs (313) are respectively fixedly connected with the outer wall of the rectangular inner screen frame (312) and the inner wall of the rectangular outer frame body (311), the two vibrating top column grooves (35) are respectively arranged at two ends of the bottom surface of the rectangular inner screen frame (312).

4. The vibratory screening apparatus for cellulose production according to claim 3, wherein: the vibrating top column (324) comprises a movable column body (3241), one end of the movable column body (3241) is movably penetrated into the top surface of the vibrating outer frame body (322), a hemisphere (3242) is fixedly arranged at the other end of the movable column body (3241), the hemisphere (3242) corresponds to the vibrating top column groove (35), a buffer spring (3243) is further sleeved outside the other end of the movable column body (3241), and two ends of the buffer spring (3243) are respectively fixedly connected with the top surfaces of the hemisphere (3242) and the vibrating outer frame body (322).

5. The vibratory screening apparatus for cellulose production according to claim 3, wherein: the opposite outer walls of the rectangular outer frame body (311) are respectively contacted with the opposite inner walls of the right cavity (13), and the distance between the rotating shaft (33) and the bottom surface of the material box (2) is more than half of the length of the rectangular outer frame body (311).

6. The vibratory screening apparatus for cellulose production according to claim 4, wherein: the hemisphere (3242) is made of rubber material.