CN220941829U - Screening precision adjusting device for material screening machine - Google Patents

Abstract

The utility model relates to the technical field of material screening, and particularly discloses a screening precision adjusting device for a material screening machine, which comprises a base, a support column, a side plate and a first conveying assembly, wherein a screening device is arranged in a shell assembly, the lower end part of the screening device is provided with a screening treatment mechanism, the screening treatment mechanism comprises a screening bag, the screening bag is positioned in the shell assembly, the screening treatment mechanism further comprises a support seat height adjusting device and a vibrating force automatic adjusting device, the two support seat height adjusting devices and the vibrating force automatic adjusting device are both positioned in the shell assembly, the thickness of the material and the condition of screening precision can be sensed and monitored in real time by optimizing the structure and the layout of the device, the overall automation degree is higher, and when the thickness of the material is larger than a preset value and the screening precision is poorer, the vibrating force automatic adjusting device and the support seat height adjusting device can be automatically adjusted without manual shutdown adjustment, so that the shutdown time is saved, and the efficiency is improved.

Description

Screening precision adjusting device for material screening machine

Technical Field

The utility model relates to the technical field of material screening, in particular to a screening precision adjusting device for a material screening machine.

Background

The main purpose of the material screening is to divide the materials into particles with different particle sizes according to different particle size requirements, so as to meet the requirements of different processes and applications, and screening precision can be regulated by controlling the stay time of the materials on a screen, and at present, the main method comprises the steps of regulating a vibrating motor eccentric block, regulating the installation angle of a vibrating screen and controlling the feeding amount of the vibrating screen, which can increase operation difficulty and production downtime.

When the screening precision of the vibrating screen is adjusted, the conventional device is generally used for adjusting the rotating speed of the motor eccentric block, adjusting the angle of the vibrating screen and controlling the feeding amount of the vibrating screen, but the operations are manually operated and cannot be adjusted in a self-adaptive manner, and the screening precision is failed or the screening precision is required to be changed, so that the machine is required to be stopped for debugging and adjusting, and the productivity is reduced.

Disclosure of utility model

(One) solving the technical problems

Aiming at the defects of the prior art, the utility model provides a screening precision adjusting device for a material screening machine, which solves the technical problem that the production rate is lower because manual adjustment is needed when the screening precision is insufficient or the screening precision needs to be changed in the existing device.

(II) technical scheme

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

The utility model provides a screening precision adjusting device for material screening machine, includes base, support column, curb plate and first conveying assembly, the support column is located the base upper end, support column and base fixed mounting, the curb plate is located the base lateral wall, curb plate and base fixed mounting, the curb plate upper end is provided with first conveying assembly, first conveying assembly and curb plate fixed mounting, curb plate surface symmetry fixed mounting has the fixed column, two the fixed column all is located first conveying assembly both sides, base upper end fixed mounting has the casing assembly, the inside screening plant that is provided with of casing assembly;

the lower end part of the screening device is provided with a screening treatment mechanism;

the screening treatment mechanism comprises a screening bag, the screening bag is positioned in the shell assembly, the shell assembly is positioned between the side plate and the support column, the upper end part of the support column is fixedly provided with a second conveying assembly, the second conveying assembly is fixedly arranged with the shell assembly, and the upper end part of the shell assembly is symmetrically and fixedly provided with a first fixing block;

Wherein, casing assembly upper end fixed mounting has supplementary feed divider, supplementary feed divider and first fixed block fixed mounting, two the inside equal fixed mounting of first fixed block has first motor, and first thing groove has all been seted up to first fixed block inside, two the output shaft of first motor all is located first thing inslot portion.

Preferably: the inner walls of the two first storage grooves are respectively provided with a first chute, and the side walls of the two first chutes are respectively symmetrically provided with a first limit groove;

Wherein, every the inside equal slidable mounting of first spacing groove has first stopper, every group all fixed mounting has first slider between the first stopper.

Preferably: each first sliding block is slidably mounted with a first sliding groove, threaded blocks are fixedly mounted between every two first sliding blocks, and screw rods are fixedly mounted on output shafts of the two first motors;

wherein, two the screw rods are all installed with first thing groove rotation, two the screw thread piece is all installed with the screw rod screw thread.

Preferably: a connecting rod is fixedly arranged between the two threaded blocks, and a scraping plate is rotatably arranged at the lower end part of the connecting rod;

The connecting rod is characterized in that an L-shaped plate is fixedly arranged on the side wall of the connecting rod, and a plurality of springs are fixedly arranged between the L-shaped plate and the scraping plate.

Preferably: the upper ends of the two fixing columns and the shell assembly are fixedly provided with second fixing blocks;

Wherein, every second thing groove has all been seted up to the inside of second fixed block, every second put the thing groove lateral wall on all symmetry set up the second spout.

Preferably: the inner wall of each second chute is symmetrically provided with a second limit groove, and the side wall of each second fixed block is fixedly provided with a second motor;

And each second storage groove is internally provided with a gear in a rotating mode, and each gear is fixedly arranged with an output shaft of the second motor.

Preferably: a second limiting block is slidably arranged in each second limiting groove, and a second sliding block is fixedly arranged between each group of second limiting blocks;

And each second sliding block is slidably mounted with the second sliding groove.

Preferably: the meshing pieces are fixedly arranged between every two of the second limiting blocks, and each meshing piece is meshed with the gear;

wherein, every the every two between the engagement piece is fixed mounting has the connecting plate.

Preferably: the lower ends of the two connecting plates are respectively and fixedly provided with a material layer thickness detection system and a visual image-text recognition system, the material layer thickness detection system is positioned above the shell assembly, and the visual image-text recognition system is positioned above the first conveying assembly;

The screening treatment mechanism further comprises a supporting seat height adjusting device and a vibrating force automatic adjusting device, wherein the two supporting seat height adjusting devices and the vibrating force automatic adjusting device are both located inside the shell assembly, and the two supporting seat height adjusting devices are both rotatably installed with the screening device.

Preferably: the automatic rapping force adjusting device is fixedly arranged with the shell assembly;

Wherein, the discharging device is fixedly arranged on the side wall of the shell assembly, which is close to one side of the first conveying assembly.

(III) beneficial effects

1. The screw rod and the thread block are driven to carry out thread transmission by opening the first motor, so that the thread block drives the connecting rod and the scraping plate to move, the height of the scraping plate can be adjusted, the thickness requirements of different process requirements can be met, and the applicability is improved.

2. Through opening the second motor for the second motor meshes with the rack that drives the gear rotation and mesh on the piece, thereby makes the piece that meshes drive the material layer thickness detecting system or the visual picture and text identification system on the connecting plate carry out high regulation, can carry out high adjustment according to preset material layer thickness parameter, can in time detect and adjust the thickness of material layer, ensures that the material layer is in the thickness scope of settlement, in order to satisfy specific screening requirement.

3. When the material passes through the scraping plate, the material is rubbed with the scraping plate, so that the spring is compressed, the scraping plate is inclined at a certain angle on the connecting rod, the elasticity of the spring can enable the scraping plate to slightly deform under the condition of adapting to different materials and working conditions, the good contact between the scraping plate and the material is kept, the accumulation and blocking phenomena of the material are avoided, and the screening effect is improved.

4. When moving through connecting rod and engagement, can drive first stopper and first slider and second stopper and second slider respectively and remove in first spacing groove and first spout and second spacing groove and second spout respectively to can provide extra support and spacing when can removing for connecting rod and engagement, increase stability.

5. Through optimizing the structure and the overall arrangement of the device, the condition of material thickness and screening precision can be perceived and monitored in real time, the overall automation degree is higher, and when the thickness of material is greater than the default and screening precision is relatively poor, vibration power automatic regulating device and supporting seat height regulating device will automatically regulated, do not need manual shutdown adjustment, have saved downtime, thereby raise the efficiency.

Drawings

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a perspective exploded view of the present utility model;

FIG. 3 is a schematic diagram of the connection explosion of the housing assembly of the present utility model;

FIG. 4 is a perspective view of an auxiliary distributing device of the present utility model;

FIG. 5 is a schematic diagram of an explosion configuration of the L-shaped panel connection of the present utility model;

FIG. 6 is a cross-sectional view of a first securing block of the present utility model;

FIG. 7 is a diagram of a connecting explosion structure of the connecting plate of the present utility model;

FIG. 8 is a cross-sectional view of a second securing block of the present utility model;

FIG. 9 is a diagram showing the construction of the connecting explosion of the discharging device of the present utility model;

FIG. 10 is a cross-sectional view of the housing assembly of the present utility model;

FIG. 11 is a schematic diagram of the connection explosion of the screening apparatus of the present utility model;

fig. 12 is a perspective view of the automatic rapping force adjusting device of the present utility model.

Legend description: 11. a base; 12. a support column; 13. a side plate; 14. a first conveying assembly; 15. fixing the column; 16. a housing assembly; 17. a screening device; 18. a second conveying assembly; 19. a first fixed block; 21. an auxiliary material distributing device; 22. a first motor; 23. a first storage tank; 24. a first chute; 25. a first limit groove; 26. a first limiting block; 27. a first slider; 28. a screw block; 29. a screw; 31. a connecting rod; 32. a scraper; 33. an L-shaped plate; 34. a spring; 35. a second fixed block; 36. a second storage tank; 37. a second chute; 38. the second limit groove; 39. a second motor; 41. a gear; 42. a second limiting block; 43. a second slider; 44. an engagement member; 45. a connecting plate; 46. a material layer thickness detection system; 47. a visual image-text recognition system; 48. a support seat height adjusting device; 49. an automatic rapping force adjusting device; 51. screening bags; 52. and a discharging device.

Detailed Description

The embodiment of the application effectively solves the technical problem of lower production rate caused by manual adjustment when the screening precision is insufficient or the screening precision needs to be changed in the conventional device, can sense and monitor the thickness of the material and the condition of the screening precision in real time by optimizing the structure and the layout of the device, has higher integral automation degree, automatically adjusts the vibration force automatic adjusting device and the supporting seat height adjusting device when the thickness of the material is larger than a preset value and the screening precision is poor, does not need manual shutdown adjustment, saves the shutdown time, improves the efficiency, and can finish the adjustment of the height of the scraping plate by starting the first motor to drive the screw rod and the screw rod to carry out screw transmission so as to drive the connecting rod and the scraping plate to move, therefore, the thickness requirements of different process requirements can be met, the applicability is increased, when materials pass through the scraping plate, the materials can rub with the scraping plate, so that the springs are compressed, the scraping plate inclines at a certain angle on the connecting rod, the elasticity of the springs can enable the scraping plate to slightly deform under the condition of adapting to different materials and working conditions, good contact between the scraping plate and the materials is kept, the phenomena of material accumulation and blocking are avoided, the screening effect is improved, and the second motor is started to enable the second motor to be meshed with the rack on the meshing piece, so that the meshing piece drives the material layer thickness detection system or the visual image-text recognition system on the connecting plate to adjust the height, the thickness of the material layer can be timely detected and adjusted according to preset material layer thickness parameters, the material layer is ensured to be in a set thickness range, in order to satisfy specific screening requirement to and when removing through connecting rod and engaging member, can drive first stopper and first slider and second stopper and second slider respectively and remove in first spacing groove and first spout and second spacing groove and second spout respectively, thereby can provide extra support and spacing when removing for connecting rod and engaging member, increase stability.

Examples

As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11 and fig. 12, the technical scheme in the embodiment of the application is to effectively solve the technical problem that the production rate is low due to manual adjustment when the screening precision is insufficient or the screening precision needs to be changed in the existing device, and the general idea is as follows:

the utility model provides a screening precision adjusting device for a material screening machine, aiming at the problems existing in the prior art, comprising a base 11, a support column 12, side plates 13 and a first conveying assembly 14, wherein the support column 12 is positioned at the upper end part of the base 11, the support column 12 is fixedly installed with the base 11, the side plates 13 are positioned on the side wall of the base 11, the side plates 13 are fixedly installed with the base 11, the upper end part of each side plate 13 is provided with the first conveying assembly 14, the first conveying assembly 14 is fixedly installed with the side plates 13, the surface of each side plate 13 is symmetrically and fixedly provided with fixing columns 15, the two fixing columns 15 are positioned at two sides of the first conveying assembly 14, the upper end part of the base 11 is fixedly provided with a shell assembly 16, and a screening device 17 is arranged inside the shell assembly 16;

The lower end part of the screening device 17 is provided with a screening treatment mechanism;

The screening treatment mechanism comprises a screening bag 51, the screening bag 51 is positioned in a shell assembly 16, the shell assembly 16 is positioned between a side plate 13 and a support column 12, a second conveying assembly 18 is fixedly arranged at the upper end part of the support column 12, the second conveying assembly 18 is fixedly arranged with the shell assembly 16, a first fixing block 19 is symmetrically and fixedly arranged at the upper end part of the shell assembly 16, an auxiliary distributing device 21 is fixedly arranged at the upper end part of the shell assembly 16, the auxiliary distributing device 21 is fixedly arranged with the first fixing block 19, a first motor 22 is fixedly arranged in each of the two first fixing blocks 19, a first storage groove 23 is formed in each of the first fixing blocks 19, the output shafts of the two first motors 22 are positioned in the first storage groove 23, when the screening treatment mechanism is used, firstly, the distance between a scraper 32 and the shell assembly 16 can be adjusted according to the thickness requirement of a material flow on the screening device 17, firstly, the first motors 22 on the first fixing blocks 19 can be started firstly, at this time, the rotation of the first motor 22 will drive the screw 29 to rotate, at this time, the screw 29 will produce screw transmission with the screw blocks 28, so that the screw blocks 28 respectively drive the first limiting blocks 26 and the first sliding blocks 27 to slide in the first limiting grooves 25 and the first sliding grooves 24, meanwhile, the connecting rod 31 will drive the scraping plate 32 and the L-shaped plate 33 to integrally rise, when the first motor 22 can be closed at this time, the inner walls of the two first storage grooves 23 are provided with the first sliding grooves 24, the side walls of the two first sliding grooves 24 are symmetrically provided with the first limiting grooves 25, the first limiting blocks 26 are slidably arranged in each first limiting groove 25, the first sliding blocks 27 are fixedly arranged between each group of the first limiting blocks 26, each first sliding block 27 is slidably arranged with the first sliding grooves 24, the screw blocks 28 are fixedly arranged between every two first sliding blocks 27, the output shafts of the two first motors 22 are fixedly provided with screw rods 29, the two screw rods 29 are rotatably installed with the first storage grooves 23, the two threaded blocks 28 are rotatably installed with the screw rods 29, a connecting rod 31 is fixedly installed between the two threaded blocks 28, the lower end part of the connecting rod 31 is rotatably provided with a scraping plate 32, the side wall of the connecting rod 31 is fixedly provided with an L-shaped plate 33, a plurality of springs 34 are fixedly installed between the L-shaped plate 33 and the scraping plate 32, the upper end parts of the two fixed columns 15 and the shell assembly 16 are fixedly provided with second fixed blocks 35, a second storage groove 36 is formed in each second fixed block 35, second sliding grooves 37 are symmetrically formed in the side wall of each second storage groove 36, second limiting grooves 38 are symmetrically formed in the inner wall of each second sliding groove 37, a second motor 39 is fixedly installed on the side wall of each second fixed block 35, gears 41 are rotatably installed in each second storage groove 36, each gear 41 is fixedly arranged with an output shaft of a second motor 39, each second limiting groove 38 is internally and slidably provided with a second limiting block 42, each group of second limiting blocks 42 is fixedly provided with a second sliding block 43, each second sliding block 43 is slidably arranged with a second sliding groove 37, each second limiting block 42 is fixedly provided with a meshing piece 44 between every two, each meshing piece 44 is meshed with the gear 41, each meshing piece 44 is fixedly provided with a connecting plate 45 between every two, the lower end parts of the two connecting plates 45 are respectively fixedly provided with a material layer thickness detection system 46 and a visual image-text recognition system 47, the heights of the material layer thickness detection system 46 and the visual image-text recognition system 47 can be adjusted according to the thickness of materials, the second motor 39 can be started firstly, the two second motors 39 can drive the gears 41 to rotate in the second storage grooves 36, and the second limiting block 42 and the second sliding block 43 are respectively driven by the engaging piece 44 to slide upwards in the second limiting groove 38 and the second sliding groove 37 by the engaging piece 44, meanwhile, the engaging piece 44 drives the connecting plate 45 and the material layer thickness detecting system 46 or the visual image-text identifying system 47 on the connecting plate 45 to move upwards in the second object placing groove 36 respectively, when the material layer thickness detecting system 46 is positioned above the shell assembly 16 after the material layer thickness detecting system is moved to a proper position, the second motor 39 can be closed, the visual image-text identifying system 47 is positioned above the first conveying assembly 14, the screening treatment mechanism further comprises a supporting seat height adjusting device 48 and a vibrating force automatic adjusting device 49, the two supporting seat height adjusting devices 48 and the vibrating force automatic adjusting device 49 are positioned inside the shell assembly 16, the two supporting seat height adjusting devices 48 are rotatably installed with the screening device 17, the rapping force automatic adjustment device 49 is fixedly mounted with the housing assembly 16, a discharging device 52 is fixedly mounted on the side wall of the housing assembly 16, which is close to the side of the first conveying assembly 14, and when preparation is completed, the first conveying assembly 14, the second conveying assembly 18, the rapping force automatic adjustment device 49 and the supporting seat height adjustment device 48 can be opened, then the collecting box can be placed under the sieving bag 51 by the staff, at this time, the opening of the rapping force automatic adjustment device 49 causes the housing assembly 16 to vibrate, at the same time, the vibration of the rapping force automatic adjustment device 49 will have a part transferred to the sieving device 17, then the material can be placed on the second conveying assembly 18, at this time, the second conveying assembly 18 will transfer the material to the sieving device 17, at this time, the material will move towards the discharging device 52, at this time, the unqualified material will be discharged through the sieving bag 51, meanwhile, the visual image-text recognition system 47 on the shell assembly 16 will continuously capture the materials on the screening device 17 at regular time, the data sampling is carried out through the recognition system, the real-time detection is carried out on the contents of the materials with small particle sizes, if the current screening precision is poor, after the current parameter is calculated, the vibration frequency and the supporting height of the supporting seat height adjusting device 48 are respectively adjusted by the vibration force automatic adjusting device 49 and the supporting seat height adjusting device 48 in the shell assembly 16, when the vibration of the vibration force automatic adjusting device 49 and the inclination angle of the screening device 17 are the largest, but still the abnormality is recognized, the rotation of the second conveying assembly 18 is reduced, the supply quantity is reduced, meanwhile, the visual image-text recognition system 47 will send out an alarm signal, and meanwhile if the material thickness detection system 46 detects that the material thickness is larger than a preset value, the cylinder in the auxiliary distributing device 21 will drive the retaining plate to descend at the moment, the auxiliary scraping plate 32 distributes materials, the conditions of the material thickness and screening precision can be sensed and monitored in real time by optimizing the structure and layout of the device, the overall automation degree is higher, and when the material thickness is larger than the preset value and the screening precision is poor, the vibration force automatic adjusting device 49 and the supporting seat height adjusting device 48 can automatically adjust, manual stop adjustment is not needed, the stop time is saved, and the efficiency is improved.

Working principle:

In the first step, when the device is used, firstly, the distance between the scraping plate 32 and the shell assembly 16 can be adjusted according to the thickness requirement of the material flow on the screening device 17, firstly, the first motor 22 on the first fixed block 19 can be started firstly, at this time, the rotation of the first motor 22 drives the screw 29 to rotate, at this time, the screw 29 and the threaded block 28 generate threaded transmission, so that the threaded block 28 respectively drives the first limiting block 26 and the first sliding block 27 to respectively slide in the first limiting groove 25 and the first sliding groove 24, and meanwhile, the connecting rod 31 can drive the scraping plate 32 and the L-shaped plate 33 to integrally rise, and when the device is adjusted to a proper position, the first motor 22 can be turned off at this time.

In a second step, the material layer thickness detection system 46 (the material layer thickness detection system 46 is composed of a photoelectric sensor, a controller, a light emitting device and a receiving device, the photoelectric sensor is composed of the light emitting device which provides proper brightness to send signals to the photoelectric sensor and is received by the receiving device to be transmitted to the controller, the controller transmits data to an external PLC processor), and the visual image-text recognition system 47 (the visual image-text recognition system 47 is usually composed of a camera, a light source, an image processing chip, a recognition engine and a controller, the proper brightness is provided by the light source, and the image processing chip and the recognition engine process and recognize pictures by the camera, and transmit the data to the controller, the controller transmits the data to an external PLC processor), at first, the second motor 39 is started, the two second motors 39 drive the gears 41 to rotate in the second object placing grooves 36, and engage with the racks on the engaging members 44, so that the engaging members 44 drive the second limiting blocks 42 and the second sliding blocks 43 respectively in the second limiting grooves 38 and the second sliding blocks 37 respectively, and the second sliding blocks 45 are simultaneously driven by the engaging members 45 to the second motor 39 and the second sliding blocks 45 to the second limiting grooves 45, and the second sliding blocks 45 are respectively, and the second motor 45 can be closed to the position of the second connecting plates 46 when the second position of the second position is reached.

Third, when the preparation is completed, the first conveyor assembly 14, the second conveyor assembly 18 (the first conveyor assembly 14 and the second conveyor assembly 18 are composed of a motor, a roller, a conveyor belt and a fixing member), the automatic rapping force adjusting device 49 and the supporting seat height adjusting device 48 can be started at this time, then the worker can put the collecting box under the sieving bag 51, at this time, the opening of the automatic rapping force adjusting device 49 causes the housing assembly 16 to vibrate, at the same time, a part of the vibration of the automatic rapping force adjusting device 49 is transferred to the sieving device 17, then the material can be placed on the second conveyor assembly 18, at this time, the second conveyor assembly 18 will transfer the material to the sieving device 17, at this time, because the housing assembly 16 is inclined as a whole, and the sieving device 17 vibrates, at this time, the material will move toward the discharging device 52, meanwhile, unqualified materials are discharged through the sieving bag 51, when the materials pass through the connecting rod 31, the connecting rod 31 is rubbed with the materials, the spring 34 is compressed, the scraping plate 32 is inclined at a certain angle on the connecting rod 31, the scraping plate 32 is used for scraping the materials, the materials are uniformly positioned on the sieving device 17, a visual image-text recognition system 47 on the shell assembly 16 is used for continuously capturing the materials on the sieving device 17 at fixed time, data sampling is carried out through the recognition system, real-time detection is carried out on the contents of the materials with small particle sizes, if the current sieving precision is poor, after the current parameters are calculated, the automatic shaking force adjusting device 49 (the automatic shaking force adjusting device 49 in the shell assembly 16 consists of a shaking motor, a shaking sensor and a controller, the controller is used for monitoring the data uploaded by the shaking sensor in real time, and the controller will transmit data to the external PLC controller) and the support seat height adjusting device 48 (the support seat height adjusting device 48 is composed of a cylinder, a connecting piece and a controller), the vibration frequency and the supporting height of the support seat height adjusting device 48 will be respectively adjusted, at this time, the support seat height adjusting device 48 will have one side to rise or fall, thereby changing the inclination angle of the sieving device 17, at the same time, the first motor 22 and the second motor 39 on the housing assembly 16 will be adaptively turned on according to the adjustment of the support seat height adjusting device 48, the scraper 32 and the material layer thickness detecting system 46 are driven to carry out the adaptive adjustment, when the vibration of the vibration force automatic adjusting device 49 and the inclination angle of the sieving device 17 are maximized, but still the abnormality is identified, at this time, the second conveying assembly 18 will be reduced in rotation and the amount is reduced, at the same time, the visual image and text identifying system 47 will send an alarm signal, at the same time, if the material layer thickness detecting system 46 detects that the material thickness is greater than the preset value, at this time, the auxiliary material distributing device 21 (composed of a cylinder and a plate) will drive the scraper 32 and the whole body thickness detecting device will drive the scraper 32 to fall, and the whole PLC controller is controlled by the external PLC controller.

Finally, it should be noted that: it is apparent that the above examples are only illustrative of the present utility model and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (10)

1. The utility model provides a screening precision adjusting device for material screening machine, includes base (11), support column (12), curb plate (13) and first transport assembly (14), support column (12) are located base (11) upper end, support column (12) and base (11) fixed mounting, curb plate (13) are located base (11) lateral wall, curb plate (13) and base (11) fixed mounting, curb plate (13) upper end is provided with first transport assembly (14), first transport assembly (14) and curb plate (13) fixed mounting, a serial communication port, curb plate (13) surface symmetry fixed mounting has fixed column (15), two fixed column (15) all are located first transport assembly (14) both sides, base (11) upper end fixed mounting has casing assembly (16), casing assembly (16) inside is provided with screening plant (17);

the lower end part of the screening device (17) is provided with a screening treatment mechanism;

The screening treatment mechanism comprises a screening bag (51), the screening bag (51) is positioned inside a shell assembly (16), the shell assembly (16) is positioned between a side plate (13) and a support column (12), a second conveying assembly (18) is fixedly arranged at the upper end part of the support column (12), the second conveying assembly (18) is fixedly arranged with the shell assembly (16), and a first fixing block (19) is symmetrically and fixedly arranged at the upper end part of the shell assembly (16);

Wherein, casing assembly (16) upper end fixed mounting has supplementary feed divider (21), supplementary feed divider (21) and first fixed block (19) fixed mounting, two the inside equal fixed mounting of first fixed block (19) has first motor (22), and first thing groove (23) have all been seted up to first fixed block (19) inside, two the output shaft of first motor (22) all is located inside first thing groove (23).

2. The screening precision adjusting device for the material screening machine according to claim 1, wherein first sliding grooves (24) are formed in the inner walls of the two first storage grooves (23), and first limit grooves (25) are symmetrically formed in the side walls of the two first sliding grooves (24);

Wherein, every first spacing groove (25) is inside all slidable mounting has first stopper (26), every group between first stopper (26) all fixed mounting has first slider (27).

3. A screening precision adjusting device for a material screening machine according to claim 2, wherein each first sliding block (27) is slidably mounted with a first sliding groove (24), a threaded block (28) is fixedly mounted between every two first sliding blocks (27), and screw rods (29) are fixedly mounted on output shafts of two first motors (22);

wherein, two screw rods (29) are rotatably installed with the first storage groove (23), and two thread blocks (28) are in threaded installation with the screw rods (29).

4. A screening precision adjusting device for a material screening machine according to claim 3, wherein a connecting rod (31) is fixedly arranged between the two threaded blocks (28), and a scraper (32) is rotatably arranged at the lower end part of the connecting rod (31);

The side wall of the connecting rod (31) is fixedly provided with an L-shaped plate (33), and a plurality of springs (34) are fixedly arranged between the L-shaped plate (33) and the scraping plate (32).

5. A screening precision adjusting device for a material screening machine according to claim 4, wherein the upper ends of the two fixing columns (15) and the shell assembly (16) are fixedly provided with second fixing blocks (35);

Wherein, every second fixed block (35) is inside all to be offered second and put thing groove (36), every second put thing groove (36) lateral wall on all symmetry have offered second spout (37).

6. The screening precision adjusting device for a material screening machine according to claim 5, wherein second limiting grooves (38) are symmetrically formed in the inner wall of each second sliding groove (37), and a second motor (39) is fixedly arranged on the side wall of each second fixing block (35);

The inside of each second storage groove (36) is rotatably provided with a gear (41), and each gear (41) is fixedly arranged with an output shaft of a second motor (39).

7. A screening precision adjusting device for a material screening machine according to claim 6, wherein a second limiting block (42) is slidably mounted in each second limiting groove (38), and a second sliding block (43) is fixedly mounted between each second limiting block (42);

Wherein each second sliding block (43) is slidably mounted with the second sliding groove (37).

8. A screening precision adjusting device for a material screening machine according to claim 7, wherein each second limiting block (42) is fixedly provided with a meshing piece (44) between every two, and each meshing piece (44) is meshed with a gear (41);

Wherein, every meshing piece (44) every two is between fixed mounting have connecting plate (45).

9. A screening precision adjusting device for a material screening machine according to claim 8, wherein the lower ends of the two connecting plates (45) are respectively fixedly provided with a material layer thickness detecting system (46) and a visual image-text identifying system (47), the material layer thickness detecting system (46) is positioned above the shell assembly (16), and the visual image-text identifying system (47) is positioned above the first conveying assembly (14);

The screening treatment mechanism further comprises a supporting seat height adjusting device (48) and a vibrating force automatic adjusting device (49), wherein the two supporting seat height adjusting devices (48) and the vibrating force automatic adjusting device (49) are both located inside the shell assembly (16), and the two supporting seat height adjusting devices (48) are both rotatably installed with the screening device (17).

10. A screening precision adjusting device for a material screening machine according to claim 9, characterized in that said rapping force automatic adjusting device (49) is fixedly mounted with the housing assembly (16);

Wherein, the side wall of the shell assembly (16) close to one side of the first conveying assembly (14) is fixedly provided with a discharging device (52).