CN115228721B - Food screening machine and process thereof - Google Patents

Abstract

The utility model relates to a food screening machine, it includes frame and the fixed screening case that sets up in the frame, the feed inlet has been seted up to the roof of screening case, the blanking mouth has been seted up to the diapire of screening case, screening incasement fixed mounting bracket that is provided with, is provided with a plurality of sieve trays from bottom to top on the mounting bracket, a plurality of sieve trays are used for filtering the food particulate matter of equidimension respectively, and the size of the filterable food particulate matter of sieve tray increases gradually from the bottom up; the sieve tray rotates and sets up on the mounting bracket, is provided with the drive assembly who is used for driving a plurality of sieve trays to deflect downwards simultaneously on the mounting bracket, and a plurality of discharge gates have been seted up to the lateral wall of screening case from the bottom up, and every discharge gate communicates respectively has a guide pipeline, and every discharge gate corresponds a sieve tray respectively, and every discharge gate department all is provided with the sealing member that is used for sealing the discharge gate. This application has when collecting the food after accomplishing the screening, and staff's low in labor strength's effect.

Description

Food screening machine and process thereof

Technical Field

The application relates to the technical field of food production and processing, in particular to a food screening machine and a process thereof.

Background

The screening machine is a machine for screening granular materials with different sizes; is often applied to a plurality of industries, such as chemical industry, food, building and the like, and the requirements of different industries on the screening machine are different according to the application industry of the screening machine.

At present, when food is processed, food particles with different sizes are usually required to be screened, a plurality of screening discs are further arranged on a screening machine from top to bottom, and the sizes of the food particles which can be filtered by the screening discs are gradually increased from bottom to top; when the screening machine screens food, the food is placed on the screen disc on the uppermost layer, so that the food vibrates or slides on the screen disc, and therefore food particles smaller than the aperture of the screen mesh on the screen disc fall onto the screen disc on the lower layer through the screen disc, the food particles with different sizes are screened, and then the food on the screen discs is collected respectively, so that the screening of the food is completed.

However, after the screening machine finishes screening food particles, a worker usually collects food on a screen tray manually, and the worker has a high labor intensity.

Disclosure of Invention

In order to reduce the labor intensity of workers, the application provides a food screening machine and a process thereof.

In a first aspect, the present application provides a food screening machine, which adopts the following technical scheme:

the utility model provides a food screening machine, includes frame and the fixed screening case that sets up in the frame, the feed inlet has been seted up to the roof of screening case, the blanking mouth has been seted up to the diapire of screening case, the screening incasement is fixed to be provided with the mounting bracket, from down to up be provided with a plurality of sieve trays on the mounting bracket, a plurality of the sieve trays are used for filtering the food particulate matter of equidimension respectively, just the filterable food particulate matter of sieve tray increases from the bottom up gradually; the screening tray rotates and sets up on the mounting bracket, be provided with the drive assembly who is used for driving a plurality of screening trays to deflect downwards simultaneously on the mounting bracket, a plurality of discharge gates have been seted up to screening case's lateral wall from the bottom up, every the discharge gate punishment do not communicate has a guide pipeline, and every discharge gate corresponds a screening tray respectively, every discharge gate department all is provided with the sealing member that is used for sealing the discharge gate.

Through adopting above-mentioned technical scheme, when carrying out the screening to food granule, pour the food granule into the screening incasement from the feed inlet of screening case, through a plurality of sieve trays respectively to the food granule of equidimension screening, food granule after sieving is stopped respectively on corresponding sieve tray according to the volume size, afterwards, open the sealing member of every discharge gate department on the screening case, order about a plurality of sieve trays simultaneously downward deflection through drive assembly, food granule on every sieve tray gets into respectively in the passage that corresponds, the staff only need collect respectively the food granule of a plurality of passage derivation can, when collecting the food after accomplishing the screening, staff's intensity of labour is low.

Optionally, be provided with a plurality of fixed blocks on the mounting bracket from the bottom up, every all seted up the spout on the roof of fixed block, the slip is provided with the installation piece in the spout, fixedly on the lateral wall of installation piece is provided with the stopper, the limit groove has been seted up along the slip direction of installation piece to the side of spout, and the stopper slides and sets up in the slip, be provided with on the fixed block and be used for driving the installation piece to keeping away from the gliding first elastic component of fixed block direction, every all fixed be provided with one on the installation piece the sieve tray, drive assembly is used for driving the fixed block rotation.

Through adopting above-mentioned technical scheme, when food particulate matter drops to the sieve tray, cushion the impact force that produces when collision to food and sieve tray through first elastic component to prevent food particulate matter damage to a certain extent.

Optionally, the drive assembly includes worm wheel, worm and actuating source, every all coaxial fixed being provided with in the axis of rotation of fixed block the worm wheel, the worm rotates and sets up on the mounting bracket, just the worm with a plurality of worm wheel meshing, the actuating source is used for driving the worm rotation.

Through adopting above-mentioned technical scheme, drive worm rotation through the drive source, worm pivoted is simultaneously, drives a plurality of worm wheels and rotates simultaneously to drive a plurality of fixed blocks and rotate simultaneously.

Optionally, the sealing member includes accepts the board, accept the board and articulate in the screening case, just accept board and discharge gate looks adaptation, every fixedly on the fixed block be provided with the transfer line, all slide along the length direction of transfer line on the transfer line and be provided with the slider, fixedly on accepting the board be provided with the connecting rod, the connecting rod is articulated with the slider, be provided with on the transfer line and be used for driving the slider to be close to the gliding second elastic component of fixed block direction.

By adopting the technical scheme, when the fixed block deflects downwards, the transmission rod is driven to move together, the sliding block slides towards the direction close to the fixed block under the action of the elasticity of the second elastic piece, and the connecting rod drives the receiving plate to deflect, so that the discharge hole is opened; meanwhile, the receiving plate is connected with the bottom of the screen disc, and food particles on the screen disc are guided into the guide pipeline through the receiving plate.

Optionally, the screen tray can dismantle the setting on the installation piece, be provided with the fixed subassembly that is used for fixed screen tray on the installation piece, the mounting mouth with the inside intercommunication of screening case is seted up to the lateral wall of screening case, the lateral wall of screening case articulates there is the sealed lid that is used for sealing the mounting mouth, be provided with the mounting that is used for fixed sealed lid on the screening case.

Through adopting above-mentioned technical scheme, through loosening the mounting and opening the closing plate of installing port department, install the screen tray on the installation piece through fixed subassembly, perhaps dismantle from the installation piece to select the quantity of screening tray in the screening case according to actual need, adjust the grade that food particulate matter sieved, and the size that the screening tray can sieve food particulate matter, increase the practicality.

Optionally, fixed subassembly includes first clamp splice, second clamp splice and locating part, first clamp splice is fixed to be set up on the installation piece, the second clamp splice slides along the direction that is close to or keeps away from first clamp splice and sets up on the installation piece, the one end that first clamp splice and second clamp splice are close to each other is all fixed and is provided with the inserted block, the spliced groove that is used for supplying the inserted block male on first clamp splice and the second clamp splice is all offered at the both ends of screen tray, the locating part is used for preventing that the second clamp splice from sliding.

Through adopting above-mentioned technical scheme, place the screen tray between first clamp splice and second clamp splice, make the inserted block on the first clamp splice insert one of them spliced groove of screen tray, slide the second clamp splice and make the inserted block on the second clamp splice insert another spliced groove of screen tray, carry out spacingly to the second clamp splice through the locating part to fix the screen tray on the installation piece.

Optionally, the locating part includes the spacing screw rod, the spacing screw rod rotates and sets up on the installation piece, just the axial of spacing screw rod is parallel with the slip direction of second clamp splice, the screw hole has been seted up along the axial of spacing screw rod on the second clamp splice, the spacing screw rod wears to locate the screw hole and with second clamp splice threaded connection.

Through adopting above-mentioned technical scheme, through rotating the spacing screw rod, because spacing screw rod and second clamp splice threaded connection, when the spacing screw rod rotates, can drive the axial slip of second clamp splice along spacing screw rod, when spacing screw rod stops rotating, can carry out spacingly to the second clamp splice.

Optionally, each fixed block is fixedly provided with a motor, an output shaft of the motor is fixedly provided with a cam, the mounting block is fixedly provided with a contact block, and the cam is used for abutting against one end of the contact block away from the fixed block and driving the contact block to slide towards the direction close to the fixed block.

Through adopting above-mentioned technical scheme, through the motor drive cam rotation, the cam rotates to a certain degree after, with the contact block contact to drive the contact block to be close to fixed block direction motion, after cam breaks away from with the contact block, the installation piece is slided to keeping away from the fixed block direction under the elasticity effect of first elastic component, and after the stopper is kept away from the lateral wall of spout diapire with the spacing groove and supports tightly, the screen tray receives inertial influence and can produce certain vibration, thereby improves the screening effect to food particulate matter.

In a second aspect, the present application provides a screening process of a food screening machine, which adopts the following technical scheme:

a screening process of a food screening machine, comprising the steps of:

s1, when food particles are screened, pouring the food particles into a screening box from a feed inlet of the screening box, screening the food particles with different sizes through a plurality of screening discs, and respectively stopping the screened food particles on the corresponding screening discs according to the volume;

s2, driving the cam to rotate through the motor, contacting the contact block after the cam rotates to a certain extent, driving the contact block to move towards the direction close to the fixed block, when the cam is separated from the contact block, the mounting block slides towards the direction far away from the fixed block under the elastic action of the first elastic piece, and when the limiting block abuts against the side wall of the limiting groove far away from the bottom wall of the sliding groove, the screen disc is subjected to inertia influence to enable the screen disc to generate certain vibration;

s3, driving the worm to rotate through the driving source, and simultaneously driving the worm wheels to rotate simultaneously, so that the fixing blocks are driven to rotate simultaneously, the screen plates are deflected downwards simultaneously, the driving rods are driven to move together when the fixing blocks deflect downwards, the sliding blocks slide towards the direction close to the fixing blocks under the action of the elasticity of the second elastic piece, and the connecting rods drive the receiving plates to deflect, so that the discharge hole is opened;

s4, when the discharge hole is opened, the receiving plate is connected with the bottom of the screen disc, food particles on the screen disc are guided into the corresponding guide pipelines through the receiving plate, and the food particles guided out by the plurality of guide pipelines are collected by staff respectively to finish screening of the food particles.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the sieved food particles are respectively remained on the corresponding sieve trays according to the volume, then, the sealing piece at each discharge hole on the sieving box is opened, the sieve trays are driven to deflect downwards simultaneously by the driving component, the food particles on each sieve tray respectively enter the corresponding material guide pipeline, the staff only needs to collect the food particles led out by the material guide pipelines respectively, and the labor intensity of the staff is low when collecting the sieved food;

2. the screen disc is installed on the installation block or detached from the installation block through the fixing component by loosening the fixing component and opening the sealing plate at the installation opening, so that the number of the screen discs in the screening box is selected according to actual needs, the grade of screening food particles is adjusted, the size of the food particles can be screened by the screen discs, and the practicability is improved;

3. the cam is driven to rotate through the motor, the cam is contacted with the contact block after rotating to a certain extent, the contact block is driven to move towards the direction close to the fixed block, after the cam is separated from the contact block, the installation block slides towards the direction away from the fixed block under the action of the elastic force of the first elastic piece, and after the limiting block is abutted against the side wall of the limiting groove away from the bottom wall of the sliding groove, the screen disc can generate certain vibration under the influence of inertia, so that the screening effect on food particles is improved.

Drawings

FIG. 1 is a schematic overall structure of an embodiment of the present application;

FIG. 2 is a schematic view of a part of the structure of an embodiment of the present application, mainly used for expressing the connection relation between the mounting frame and the screen tray;

FIG. 3 is an enlarged view of portion A of FIG. 2;

fig. 4 is a schematic view of a part of the structure of an embodiment of the present application, mainly for expressing the structure of a seal.

Reference numerals illustrate: 1. a frame; 2. a screening box; 21. a material guiding pipeline; 22. a mounting port; 23. sealing cover; 24. a fixing member; 25. a receiving plate; 251. a connecting rod; 3. a screen tray; 31. a plug-in groove; 4. a mounting frame; 41. a fixed block; 411. a chute; 412. a mounting block; 4121. a limiting block; 4122. a connecting groove; 4123. a contact block; 413. a limit groove; 414. a first elastic member; 415. a motor; 4151. a cam; 416. a transmission rod; 4161. a slide block; 4162. a second elastic member; 42. a material guide plate; 5. a drive assembly; 51. a worm wheel; 52. a worm; 53. a motor; 6. a fixing assembly; 61. a first clamping block; 62. a second clamping block; 621. a connecting block; 63. a limit screw; 64. and (5) inserting blocks.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses a food screening machine. Referring to fig. 1, including frame 1 and fixed screening case 2 that sets up in frame 1, the feed inlet has been seted up to the roof of screening case 2, the blanking mouth has been seted up to the diapire of screening case 2, be provided with a plurality of sieve trays 3 in the screening case 2 from the bottom up, a plurality of sieve trays 3 are used for filtering the food particulate matter of equidimension respectively, and the filterable food particulate matter's of sieve tray 3 size from the bottom up increases gradually, a plurality of discharge gates have been seted up to the lateral wall of screening case 2 from the bottom up, every discharge gate department all communicates has a guide pipeline 21, one side that the screening case 2 was kept away from to guide pipeline 21 all downward sloping, every discharge gate department all is provided with the sealing member that is used for sealing the discharge gate.

Referring to fig. 1, an installation opening 22 communicated with the inside of the screening box 2 is formed in the side wall of the screening box 2, a sealing cover 23 for sealing the installation opening 22 is hinged to the side wall of the screening box 2, the sealing installation opening 22 is matched with the sealing cover 23, a fixing piece 24 for fixing the sealing cover 23 is arranged on the screening box 2, the fixing piece 24 comprises a bolt, a first threaded hole is formed in the sealing cover 23 along the direction perpendicular to the sealing cover 23, a second threaded hole is formed in the side wall of the screening box 2, the first threaded hole and the second threaded hole are matched with the bolt, and when the sealing cover 23 seals the installation opening 22, the first threaded hole is opposite to the second threaded hole.

Referring to fig. 1 and 2, a mounting frame 4 is fixedly arranged in a screening box 2, a plurality of fixing blocks 41 are arranged on the mounting frame 4 from bottom to top, the distance between two adjacent fixing blocks 41 is equal, the length direction of each fixing block 41 is horizontally arranged, the fixing blocks 41 are rotatably arranged on the mounting frame 4, the rotating shafts of the fixing blocks 41 are parallel to the length direction of each fixing block 41, and a driving assembly 5 for driving the plurality of fixing blocks 41 to rotate simultaneously is arranged on the mounting frame 4.

Referring to fig. 2, a guide plate 42 is fixedly disposed on the mounting frame 4 above each fixing block 41, and one end of the guide plate 42 away from the mounting frame 4 is disposed in a downward inclined manner.

Referring to fig. 2 and 3, the driving assembly 5 includes worm gears 51, a worm 52 and a driving source, one worm gear 51 is coaxially and fixedly arranged on the rotation shaft of each fixing block 41, the worm 52 is rotatably arranged on the mounting frame 4, the length direction of the worm 52 is vertical, the worm 52 is simultaneously meshed with the worm gears 51, the driving source includes a motor 53, the motor 53 is fixedly arranged on the mounting frame 4, and the output shaft of the motor 53 is coaxially and fixedly connected with the worm 52.

Referring to fig. 3, the top wall of each fixing block 41 is provided with a sliding groove 411 along the length direction of the vertical fixing block 41, a mounting block 412 is slidably arranged in the sliding groove 411, a limiting block 4121 is fixedly arranged on the side wall of the mounting block 412, a limiting groove 413 is formed in the side edge of the sliding groove 411 along the sliding direction of the mounting block 412, the limiting block 4121 is slidably arranged in the sliding groove, a first elastic piece 414 for driving the mounting block 412 to slide along the direction far away from the fixing block 41 is arranged on the fixing block 41, the first elastic piece 414 comprises a plurality of compression springs, the compression springs are arranged in the sliding groove 411, one ends of the compression springs are fixedly connected with the bottom wall of the sliding groove 411, and the other ends of the compression springs are fixedly connected with the mounting block 412.

Referring to fig. 3, each of the mounting blocks 412 is provided with a fixing assembly 6 for fixing the screen disc 3, the fixing assembly 6 includes a first clamping block 61, a second clamping block 62 and a limiting member, the first clamping block 61 is fixedly arranged on the mounting block 412, a connecting groove 4122 is formed in the side wall of the mounting block 412 along the vertical direction, the second clamping block 62 is fixedly provided with a connecting block 621, the connecting block 621 is slidably arranged in the connecting groove 4122, one ends, close to each other, of the first clamping block 61 and the second clamping block 62 are fixedly provided with an inserting block 64, and both ends of the screen disc 3 are provided with inserting grooves 31 for inserting the inserting blocks 64 on the first clamping block 61 and the second clamping block 62.

Referring to fig. 3, the limiting member includes a limiting screw 63, the limiting screw 63 is rotatably disposed on the mounting block 412, and one end of the limiting screw 63 extends into the connecting slot 4122, the axial direction of the limiting screw 63 is parallel to the sliding direction of the second clamping block 62, a threaded hole is formed in the connecting block 621 along the axial direction of the limiting screw 63, and the limiting screw 63 is threaded through the threaded hole and is in threaded connection with the connecting block 621.

The screen disc 3 is placed between the first clamping block 61 and the second clamping block 62, the inserting block 64 on the first clamping block 61 is inserted into one of the inserting grooves 31 of the screen disc 3, the limiting screw 63 is rotated, the second clamping block 62 is driven to slide while the limiting screw 63 is rotated due to the threaded connection of the limiting screw 63 and the connecting block 621, the inserting block 64 on the second clamping block 62 is inserted into the other inserting groove 31 of the screen disc 3, and after the first clamping block 61 and the second clamping block 62 are respectively abutted against two ends of the screen disc 3, the rotation of the limiting screw 63 is stopped, so that the second clamping block 62 can be limited, and the screen disc 3 is fixed on the mounting block 412.

Referring to fig. 3, a motor 415 is fixedly arranged on each fixed block 41, a cam 4151 is fixedly arranged on an output shaft of the motor 415, a contact block 4123 is fixedly arranged on a side wall of the mounting block 412, and the cam 4151 is used for abutting against one end of the contact block 4123 far away from the fixed block 41 and driving the contact block 4123 to slide towards the direction approaching the fixed block 41; the cam 4151 is driven to rotate by the motor 415, the cam 4151 contacts the contact block 4123 after rotating to a certain extent, and drives the contact block 4123 to move towards the direction close to the fixed block 41, when the cam 4151 is separated from the contact block 4123, the mounting block 412 slides towards the direction far away from the fixed block 41 under the elastic force of the pressure spring, and when the limiting block 4121 abuts against the side wall of the limiting groove 413 far away from the bottom wall of the sliding groove 411, the screen disc 3 is subjected to certain vibration due to the influence of inertia, so that the screening effect on food particles is improved.

Referring to fig. 2 and 4, the sealing member includes a receiving plate 25, the receiving plate 25 is hinged in the screening box 2, the hinged end of the receiving plate 25 and the screening box 2 is located at the lower opening wall of the discharge opening, the receiving plate 25 is adapted to the discharge opening, a transmission rod 416 is fixedly arranged on each fixing block 41, a long strip groove is formed in the side wall of the transmission rod 416 along the length direction of the transmission rod 416, a sliding block 4161 is slidably arranged in the long strip groove, the cross section of the sliding block 4161 is in a T shape, the long strip groove is adapted to the sliding block 4161, a connecting rod 251 is fixedly arranged on the receiving plate 25, the connecting rod 251 is hinged with the sliding block 4161, a second elastic member 4162 for driving the sliding block 4161 to slide towards the direction close to the fixing block 41 is arranged on the transmission rod 416, the second elastic member 4162 includes a tension spring, one end of the tension spring is fixedly connected with the side wall of the long strip groove close to the fixing block 41, and the other end of the tension spring is fixedly connected with the sliding block 4161. When the fixed block 41 deflects downwards, the transmission rod 416 is driven to move together, the sliding block 4161 slides towards the direction close to the fixed block 41 under the action of the elasticity of the tension spring, and the connecting rod 251 drives the receiving plate 25 to deflect, so that the discharge port is opened; at the same time, the receiving plate 25 engages the bottom of the sieve tray 3, and the food particles on the sieve tray 3 are guided into the guide duct 21 via the receiving plate 25.

The implementation principle of the food screening machine in the embodiment of the application is as follows: when food particles are screened, pouring the food particles into the screening box 2 from the feed inlet of the screening box 2, screening the food particles with different sizes through a plurality of screening discs 3, and respectively stopping the screened food particles on the corresponding screening discs 3 according to the volume; then, the worm 52 is driven to rotate by the motor 53, and the worm 52 rotates and simultaneously drives the worm gears 51 to rotate, so that the fixed blocks 41 are driven to rotate simultaneously, and the screen plates 3 deflect downwards simultaneously.

When the fixed block 41 deflects downwards, the transmission rod 416 is driven to move together, the sliding block 4161 slides towards the direction close to the fixed block 41 under the action of the elastic force of the tension spring, the connecting rod 251 drives the receiving plate 25 to deflect, so that the discharge hole is opened, the receiving plate 25 is connected with the bottom of the screen disc 3 when the discharge hole is opened, food particles on the screen disc 3 are led into the corresponding guide pipelines 21 through the receiving plate 25, workers only need to collect the food particles led out by the plurality of guide pipelines 21 respectively, and the labor intensity of the workers is low when the screened food is collected.

The embodiment of the application also discloses a screening process of the food screening machine, which comprises the following steps:

s1, when food particles are screened, pouring the food particles into the screening box 2 from a feed inlet of the screening box 2, screening the food particles with different sizes through a plurality of screening discs 3, and respectively stopping the screened food particles on the corresponding screening discs 3 according to the volume;

s2, driving a cam 4151 to rotate through a motor 415, enabling the cam 4151 to contact with a contact block 4123 after rotating to a certain degree, driving the contact block 4123 to move towards a direction close to a fixed block 41, enabling an installation block 412 to slide towards a direction far away from the fixed block 41 under the elastic force of a pressure spring after the cam 4151 is separated from the contact block 4123, and enabling a screen disc 3 to generate certain vibration under the influence of inertia after a limiting block 4121 abuts against the side wall of a limiting groove 413 far away from the bottom wall of a sliding groove 411;

s3, driving the worm 52 to rotate through the motor 53, driving the worm 52 to rotate and simultaneously driving the worm gears 51 to rotate so as to drive the fixed blocks 41 to rotate simultaneously, enabling the screen plates 3 to deflect downwards simultaneously, driving the transmission rod 416 to move together when the fixed blocks 41 deflect downwards, sliding the sliding block 4161 towards the direction close to the fixed blocks 41 under the action of the elasticity of the tension spring, driving the bearing plate 25 to deflect through the connecting rod 251, and opening the discharge port;

s4, when the discharge hole is opened, the receiving plate 25 is connected with the bottom of the screen disc 3, food particles on the screen disc 3 are guided into the corresponding guide pipelines 21 through the receiving plate 25, and workers collect the food particles guided out by the plurality of guide pipelines 21 respectively to finish screening the food particles.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (7)

1. A food screening machine, characterized in that: the screening box comprises a frame (1) and a screening box body (2) fixedly arranged on the frame (1), wherein a feed inlet is formed in the top wall of the screening box body (2), a blanking inlet is formed in the bottom wall of the screening box body (2), a mounting frame (4) is fixedly arranged in the screening box body (2), a plurality of screening discs (3) are arranged on the mounting frame (4) from bottom to top, the screening discs (3) are respectively used for filtering food particles with different sizes, and the size of the food particles which can be filtered by the screening discs (3) is gradually increased from bottom to top;

the screening plates (3) are rotatably arranged on the mounting frame (4), a driving component (5) for driving the screening plates (3) to deflect downwards simultaneously is arranged on the mounting frame (4), a plurality of discharge ports are formed in the side wall of the screening box (2) from bottom to top, each discharge port is respectively communicated with a material guide pipeline (21), each discharge port corresponds to one screening plate (3), and a sealing piece for sealing the discharge port is arranged at each discharge port;

a plurality of fixed blocks (41) are arranged on the mounting frame (4) from bottom to top, a sliding groove (411) is formed in the top wall of each fixed block (41), a mounting block (412) is arranged in the sliding groove (411), a limiting block (4121) is fixedly arranged on the side wall of each mounting block (412), a limiting groove (413) is formed in the side edge of each sliding groove (411) along the sliding direction of each mounting block (412), the limiting blocks (4121) are arranged in the sliding, a first elastic piece (414) for driving the corresponding mounting block (412) to slide in the direction away from the corresponding fixed block (41) is arranged on each fixed block (41), a screen disc (3) is fixedly arranged on each mounting block (412), and the driving assembly (5) is used for driving the corresponding fixed block (41) to rotate;

the sealing member includes accepts board (25), accept board (25) articulate in screening case (2), just accept board (25) and discharge gate looks adaptation, every fixedly on fixed block (41) be provided with transfer line (416), all slide along the length direction of transfer line (416) on transfer line (416) and be provided with slider (4161), fixedly on accepting board (25) be provided with connecting rod (251), connecting rod (251) are articulated with slider (4161), be provided with on transfer line (416) and be used for driving slider (4161) to be close to second elastic component (4162) that fixed block (41) direction slided.

2. A food sifting machine according to claim 1, wherein: the driving assembly (5) comprises worm wheels (51), worms (52) and a driving source, the worm wheels (51) are coaxially and fixedly arranged on the rotating shafts of the fixing blocks (41), the worms (52) are rotatably arranged on the mounting frame (4), the worms (52) are meshed with the worm wheels (51), and the driving source is used for driving the worms (52) to rotate.

3. A food sifting machine according to claim 1, wherein: the utility model discloses a screening box, including screening box (2), screening plate (3), fixed subassembly (6), fixed subassembly (24) that are used for fixed screening plate (3) are provided with on installation piece (412) to screening plate (3) can dismantle setting up on installation piece (412), installation mouth (22) with screening box (2) inside intercommunication are seted up to the lateral wall of screening box (2), the lateral wall of screening box (2) articulates there is sealed lid (23) that are used for sealing installation mouth (22), be provided with on screening box (2) mounting (24) that are used for fixed sealed lid (23).

4. A food sifting machine according to claim 3, wherein: the fixed subassembly (6) is including first clamp splice (61), second clamp splice (62) and locating part, first clamp splice (61) is fixed to be set up on installation piece (412), second clamp splice (62) are along being close to or keeping away from the direction slip setting of first clamp splice (61) on installation piece (412), the one end that first clamp splice (61) and second clamp splice (62) are close to each other is all fixed to be provided with insert block (64), insert groove (31) that are used for supplying insert block (64) male on first clamp splice (61) and second clamp splice (62) are all seted up at the both ends of screen tray (3), the locating part is used for preventing second clamp splice (62) to slide.

5. The food screening machine of claim 4, wherein: the limiting piece comprises a limiting screw (63), the limiting screw (63) is rotatably arranged on the mounting block (412), the axial direction of the limiting screw (63) is parallel to the sliding direction of the second clamping block (62), a threaded hole is formed in the second clamping block (62) along the axial direction of the limiting screw (63), and the limiting screw (63) penetrates through the threaded hole and is in threaded connection with the second clamping block (62).

6. A food sifting machine according to claim 1, wherein: each fixed block (41) is fixedly provided with a motor (415), an output shaft of the motor (415) is fixedly provided with a cam (4151), each mounting block (412) is fixedly provided with a contact block (4123), and the cam (4151) is used for abutting against one end, away from the fixed block (41), of the contact block (4123) and driving the contact block (4123) to slide towards the direction, close to the fixed block (41).

7. A screening process of a food screening machine according to any one of claims 1-6, comprising the steps of:

s1, when food particles are screened, pouring the food particles into a screening box (2) from a feed inlet of the screening box (2), screening the food particles with different sizes through a plurality of screening discs (3), and respectively stopping the screened food particles on the corresponding screening discs (3) according to the volume;

s2, driving a cam (4151) to rotate through a motor (415), enabling the cam (4151) to contact with a contact block (4123) after rotating to a certain degree, driving the contact block (4123) to move towards a direction close to a fixed block (41), enabling a mounting block (412) to slide towards a direction far away from the fixed block (41) under the elastic force of a first elastic piece (414) after the cam (4151) is separated from the contact block (4123), and enabling a screen disc (3) to generate certain vibration under the influence of inertia after a limiting block (4121) abuts against the side wall of a limiting groove (413) far away from the bottom wall of a sliding groove (411);

s3, driving the worm (52) to rotate through the driving source, driving the worm (52) to rotate simultaneously and driving the worm gears (51) to rotate simultaneously, driving the fixed blocks (41) to rotate simultaneously, enabling the screen plates (3) to deflect downwards simultaneously, driving the transmission rod (416) to move together when the fixed blocks (41) deflect downwards, enabling the sliding block (4161) to slide towards the direction close to the fixed blocks (41) under the elastic force of the second elastic piece (4162), and driving the receiving plate (25) to deflect through the connecting rod (251), so that the discharge hole is opened;

s4, when the discharge hole is opened, the receiving plate (25) is connected with the bottom of the screen disc (3), food particles on the screen disc (3) are guided into the corresponding material guide pipelines (21) through the receiving plate (25), and workers collect the food particles guided out by the material guide pipelines (21) respectively to finish screening the food particles.

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