阅读说明：本技术 一种筛选除杂上料设备 (Screening edulcoration charging equipment ) 是由 周虎林 李辉 方彧 方杰 江传圣 于 2021-07-21 设计创作，主要内容包括：本发明涉及一种筛选除杂上料设备,包括四个支撑夹持架,两队支撑夹持架上安装有若干个夹持机构,每个夹持机构的中部均安装有传送辊,支撑夹持架的上方设置有驱动机构,驱动机构的中部安装有清洗烘干机构,驱动机构对清洗烘干机构进行往复移动,清洗烘干机构对传送辊的外周进行清理,通过调整夹持机构的间距从而对任意的球形物进行筛分除杂,避免使用人工,省时省力,对待筛分物以直径为标准进行筛分,并掉落在分选筐中相对应的不同格中,从而完成除杂和筛分,避免挤压和堵塞,清理完毕后,启动烘干机,对传送辊进行烘干,从而保持其表面的洁净度。(The invention relates to screening, impurity removing and feeding equipment which comprises four supporting and clamping frames, wherein a plurality of clamping mechanisms are arranged on two pairs of supporting and clamping frames, a conveying roller is arranged in the middle of each clamping mechanism, a driving mechanism is arranged above each supporting and clamping frame, a cleaning and drying mechanism is arranged in the middle of each driving mechanism, the driving mechanisms carry out reciprocating motion on the cleaning and drying mechanisms, the cleaning and drying mechanisms clean the periphery of the conveying rollers, screening and impurity removing are carried out on any spherical objects by adjusting the distance between the clamping mechanisms, labor and time are saved, the objects to be screened are screened by taking the diameter as a standard and fall into different corresponding grids in a sorting basket, so that impurity removing and screening are completed, extrusion and blockage are avoided, and after cleaning is finished, a dryer is started to dry the conveying rollers, so that the cleanliness of the surfaces of the conveying rollers is kept.)

1. The utility model provides a screening edulcoration charging equipment, includes four support holding frame (3), its characterized in that, two pairs support and install a plurality of fixture (4), every on holding frame (3) the transfer roller (14) are all installed at the middle part of fixture (4), the top of supporting holding frame (3) is provided with actuating mechanism, actuating mechanism's mid-mounting has cleaning and drying mechanism, actuating mechanism carries out reciprocating motion to cleaning and drying mechanism, cleaning and drying mechanism clears up the periphery of transfer roller (14).

2. The screening, impurity-removing and feeding equipment as claimed in claim 1, wherein the clamping mechanism (4) comprises four clamping pieces (8) used for being hung on the supporting and clamping frame (3) and clamping the supporting and clamping frame (3), a hanging groove is formed in the lower side of each clamping piece (8), and a clamping piece (17) is installed in the hanging groove.

3. The screening, impurity-removing and feeding equipment as claimed in claim 2, wherein a pair of clamping frames (9) is installed between each pair of clamping members (8), a gear faceplate (10) is rotatably connected to the middle of the pair of clamping frames (9) on the outer side of each clamping mechanism (4), clamping rollers (11) are arranged on the upper side and the lower side of the gear faceplate (10), and a transmission chain (12) is meshed on the gear faceplate (10).

4. A screening, impurity-removing and feeding device according to claim 3, characterized in that a connecting cross bar is installed between two clamping pieces (8) at the bottom, a conveying roller (14) is installed between two pairs of clamping frames (9), and a driving shaft of the conveying roller (14) is fixedly connected with driving shafts of gear faceplates (10) at two sides.

5. A screening, impurity-removing and feeding device according to claim 2, characterized in that a clamping bolt (13) is arranged on the front side of the clamping piece (8) in a penetrating manner, the clamping bolt (13) is in threaded connection with the clamping piece (8), and the end of the clamping bolt (13) is in rotational connection with the center of the side surface of the clamping piece (17).

6. The screening, impurity removing and feeding equipment according to claim 5, wherein the supporting and clamping frame (3) is hollow and has a square cross section, a sliding groove (15) is formed in the outer side surface of the supporting and clamping frame (3), and the width of the sliding groove (15) is consistent with the diameter of the clamping bolt (13).

7. The screening, impurity-removing and feeding equipment as claimed in claim 5, wherein an installation through groove is formed in the upper portion of one side of the supporting and clamping frame (3), an installation groove (16) is further formed in the outer side, close to the installation through groove, of the supporting and clamping frame (3), the groove width of the installation groove (16) is consistent with the diameter of the clamping bolt (13), the groove length of the installation through groove is consistent with the length of the clamping piece (17), and the inner width of the supporting and clamping frame (3) is consistent with the width of the clamping piece (17).

8. The screening, impurity-removing and feeding device as claimed in claim 1, wherein the cleaning and drying mechanism comprises a pair of instrument boxes (25), a liquid guide pipe (29) is installed between the two instrument boxes (25), a plurality of spray heads (30) are installed on the lower side of the liquid guide pipe (29) at equal intervals, a water retaining cover (31) is arranged on the upper side of the liquid guide pipe (29), and a brush barrel (18) is arranged on the lower side of the liquid guide pipe (29).

9. The screening, impurity removing and feeding device according to claim 1, wherein the driving mechanism comprises a motor box (7), supporting sliding carriages (6) are mounted on two sides of the motor box (7), a driving motor (20) is arranged inside the motor box (7), a transmission rod (21) is arranged on the upper side of the driving motor (20), the driving motor (20) is in transmission with the transmission rod (21) through a transmission gear, a lead screw (22) is rotatably connected to the center of the supporting sliding carriages (6), two ends of the transmission rod (21) are in transmission with the end portions of the two lead screws (22) through bevel gears (23), and sliding blocks (24) are sleeved on the lead screws (22) in a threaded manner.

10. The screening, impurity-removing and feeding device as claimed in claim 9, wherein supporting plates (19) are arranged at the tops of the two supporting carriages (6), a plurality of rollers are uniformly distributed in an array and embedded in the lower sides of the supporting plates (19), transmission plates (26) are fixedly connected to the lower sides of the two ends of each supporting plate (19), and the transmission plates (26) located on the outer sides are connected with the sliding blocks (24) through connecting blocks.

Technical Field

The invention relates to the technical field of sorting devices, in particular to screening, impurity removing and feeding equipment.

Background

The winter jujube is a high-quality late-maturing fresh food variety in the northwest of Shandong, belongs to Rhamnaceae, belongs to jujube, is a late-maturing fresh food excellent variety of thornless jujube trees, is distributed in Shanxi, Hebei, Shandong and the like, is naturally mature in 10-11 months of the Yangtze calendar, contains 19 amino acids required by human bodies, such as aspartic acid, threonine, serine and the like, also contains more vitamin A, vitamin E, potassium, sodium, iron, copper and other trace elements, has the nutritional value of crown of hundred fruits, and is called as Baiguowang.

The invention with the publication number of CN112772149A discloses an automatic winter jujube picking and classifying device, which comprises an outer cover, wherein three supporting legs are fixedly arranged on the periphery of the outer cover at equal angles, a guide cylinder is fixedly arranged in the middle of the outer cover, a hidden disc is fixedly arranged at the lower end of the periphery of the outer cover, six extrusion devices are annularly arranged in the hidden disc, a lower cylinder is arranged at the bottom of the interior of the outer cover, a middle cylinder is fixedly arranged in the middle of the top of the lower cylinder, and a buffer disc is fixedly arranged at the lower end of the interior of the guide cylinder and the periphery of the middle cylinder.

When current equipment is carrying out simple classification to globular thing such as winter jujube, the single hole blanking that utilizes, this means is too simple, often can appear winter jujube extrusion and the condition that the hole blockked up, and not only inefficiency, it is also more troublesome to get up to work simultaneously, and the most common manual sorting that is of current classification means in addition, but this means work load is big, and manual operation also appears the mistake very easily.

Disclosure of Invention

The invention aims to provide screening, impurity removing and feeding equipment aiming at the problems and the defects, so that the overall working efficiency is improved.

The technical problem solved by the invention is as follows:

(1) the manual sorting workload is large, time and labor are wasted, and errors are easy to occur;

(2) the existing hole blanking equipment is low in efficiency and is often extruded and blocked.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a screening edulcoration firing equipment, includes four support holding frames, and two teams support and install a plurality of fixture on the holding frame, and the transfer roller is all installed at every fixture's middle part, and the top of supporting the holding frame is provided with actuating mechanism, and actuating mechanism's mid-mounting has the stoving mechanism of washing, and actuating mechanism carries out reciprocating motion to the stoving mechanism of washing, and stoving mechanism of washing clears up the periphery of transfer roller.

According to a further scheme of the invention, the clamping mechanism comprises four clamping pieces which are hung on the supporting and clamping frame and used for clamping the supporting and clamping frame, a hanging groove is formed in the lower side of each clamping piece, and a clamping piece is installed in each hanging groove.

As a further scheme of the invention, a pair of clamping frames is arranged between each pair of clamping pieces, a gear disc chuck is rotatably connected to the middle part between the pair of clamping frames at the outer side of each clamping mechanism, clamping rollers are arranged on the upper side and the lower side of the gear disc chuck, and a transmission chain is meshed on the gear disc chuck.

As a further scheme of the invention, a connecting cross rod is arranged between two clamping pieces positioned at the bottom, a conveying roller is arranged between two pairs of clamping frames, and a driving shaft of the conveying roller is fixedly connected with driving shafts of gear faceplates positioned at two sides.

As a further scheme of the invention, a clamping bolt penetrates through the front side of the clamping piece, the clamping bolt is in threaded connection with the clamping piece, and the end part of the clamping bolt is rotatably connected with the center of the side surface of the clamping piece.

As a further scheme of the invention, the supporting and clamping frame is hollow, the cross section of the supporting and clamping frame is in a square shape, the outer side surface of the supporting and clamping frame is provided with a sliding groove, and the width of the sliding groove is consistent with the diameter of the clamping bolt.

As a further scheme of the invention, an installation through groove is formed in the upper portion of one side of the supporting and clamping frame, an installation groove is further formed in the outer side, close to the installation through groove, of the supporting and clamping frame, the groove width of the installation groove is consistent with the diameter of the clamping bolt, the groove length of the installation through groove is consistent with the length of the clamping piece, and the inner width of the supporting and clamping frame is consistent with the width of the clamping piece.

As a further scheme of the invention, the cleaning and drying mechanism comprises a pair of instrument boxes, a liquid guide pipe is arranged between the two instrument boxes, a plurality of spray heads are arranged at equal intervals on the lower side of the liquid guide pipe, a water retaining cover is arranged on the upper side of the liquid guide pipe, and a brush barrel is arranged on the lower side of the liquid guide pipe.

As a further scheme of the invention, the driving mechanism comprises a motor box, supporting sliding frames are mounted on two sides of the motor box, a driving motor is arranged in the motor box, a transmission rod is arranged on the upper side of the driving motor, the driving motor is in transmission with the transmission rod through a transmission gear, a screw rod is rotatably connected to the center of each supporting sliding frame, two ends of the transmission rod are in transmission with the end parts of the two screw rods through conical gears respectively, and a sliding block is sleeved on each screw rod in a threaded manner.

As a further scheme of the invention, the top parts of the two supporting sliding frames are respectively provided with a supporting plate, the lower side of each supporting plate is embedded with a plurality of rollers which are uniformly distributed in an array, the lower sides of the two ends of each supporting plate are respectively and fixedly connected with a transmission plate, and the transmission plates positioned on the outer sides are connected with sliding blocks through connecting blocks.

The invention has the beneficial effects that:

(1) the distance between every two adjacent clamping mechanisms is adjustable at will, so that the distance between every two adjacent conveying rollers is adjusted, after the distance between every two adjacent conveying rollers in each area is determined, the clamping bolts are rotated, the side walls supporting the clamping frame are clamped through the clamping pieces and the clamping pieces, the clamping mechanisms are fixed, spherical fruits such as jujube fruits and the like can be screened and decontaminated, meanwhile, any spherical objects can be screened and decontaminated, the distance between every two adjacent clamping mechanisms is adjusted, so that the screening and decontaminating of any spherical objects is avoided, the labor is saved, and the time and the labor are saved;

(2) the power motor provides power, and through a transmission mechanism consisting of a power gear, a transmission chain and a clamping mechanism, the transmission rollers arranged on the clamping mechanism rotate at a constant speed, when an object to be screened is placed on the transmission roller far away from one side of the power motor, sundries such as weeds fall into gaps between adjacent transmission rollers in a breaking-out manner and fall into a first grid of the sorting basket, so that the sundries are removed, then along with the gradual increase of the length of the gaps between adjacent transmission rollers in different areas, the object to be screened is screened by taking the diameter as a standard and falls into corresponding different grids in the sorting basket, so that the sundries and the sorting are completed, and extrusion and blockage are avoided;

(3) the driving motor drives the transmission rod to rotate, and further drives the screw rod to rotate, so as to move the sliding block, and then the cleaning and drying mechanism is reciprocated through the transmission plate and the supporting plate, thereby cleaning each conveying roller and removing sundries attached to the conveying roller, when the driving mechanism reciprocates on the supporting sliding frame to clean and dry the mechanism, the brushless motor drives the brush barrel to rotate through the driving belt, thereby cleaning the dust on the conveying roller, then the water pump extracts the cleaning liquid from the water tank, the cleaning liquid is sprayed on the conveying roller and the brush barrel through the spray head, the cleaning effect of the cleaning liquid is enhanced through the brush barrel, thereby removing the attached stains, then introducing clean water into the water tank to remove the cleaning liquid, and blocking water drops by using the water blocking cover to prevent the water drops from attaching to the dryer, and after cleaning, starting the dryer to dry the conveying roller so as to keep the surface cleanliness of the conveying roller.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the mechanism of the clamping mechanism of the present invention;

FIG. 3 is an enlarged schematic view of region A of FIG. 1;

FIG. 4 is an enlarged schematic view of region B of FIG. 1;

FIG. 5 is an enlarged schematic view of region C of FIG. 2;

FIG. 6 is a schematic structural view of the driving mechanism of the present invention;

FIG. 7 is a top view of the cleaning and drying mechanism of the present invention;

FIG. 8 is a side view of the washer dryer mechanism of the present invention with the dryer removed;

in the figure: 1. a support; 2. an instrument rack; 3. supporting the clamping frame; 4. a clamping mechanism; 5. a mounting frame; 6. a support carriage; 7. a motor box; 8. a clamping member; 9. a clamping frame; 10. a gear faceplate; 11. clamping the roller; 12. a drive chain; 13. clamping the bolt; 14. a conveying roller; 15. a sliding groove; 16. mounting grooves; 17. a clamping piece; 18. a brush barrel; 19. a support plate; 20. a drive motor; 21. a transmission rod; 22. a screw rod; 23. a bevel gear; 24. a slider; 25. an instrument cartridge; 26. a drive plate; 27. a brushless motor; 28. a water pump; 29. a catheter; 30. a spray head; 31. a water retaining cover; 32. a dryer; 33. a power motor; 34. a power gear.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Please refer to fig. 1-8: a screening, impurity removing and feeding device comprises a support 1, an instrument frame 2 is installed on one side of the support 1, a pair of supporting and clamping frames 3 are installed at two ends of the instrument frame 2 respectively, one end of each supporting and clamping frame 3 is fixedly connected to the other side of the support 1, the other end of each supporting and clamping frame 3 is fixedly connected to the instrument frame 2, a plurality of clamping mechanisms 4 are installed on each supporting and clamping frame 3, a conveying roller 14 is installed in the middle of each clamping mechanism 4, mounting frames 5 are installed on two sides of the support 1, a driving mechanism used for moving the cleaning and drying mechanisms is installed on each mounting frame 5, a cleaning and drying mechanism used for cleaning the conveying rollers 14 is installed on each driving mechanism, a power motor 33 is installed on each instrument frame 2, a power gear 34 is installed at the end of a driving shaft of each power motor 33, and the power gear 34 is in transmission with the clamping mechanisms 4 through a transmission chain 12, the downside of support 1 is provided with the sorting basket, the sorting basket is located the regional under of a plurality of transfer roller 14, provide power through motor power 33, and through power gear 34, the drive mechanism that drive chain 12 and fixture 4 constitute, thereby make the transfer roller 14 of installing on fixture 4 rotate at the uniform velocity with the same speed, when waiting to sieve the thing and put on the transfer roller 14 of keeping away from motor power 33 one side, debris such as weeds fall in the space between the adjacent transfer roller 14 in a dispute, and fall in the first check of sorting basket, thereby carry out the edulcoration, increase gradually along with the space length between the adjacent transfer roller 14 in different regions afterwards, treat that the thing of sieving sieves as the standard with the diameter, and fall in the different checks that correspond in the sorting basket, thereby accomplish edulcoration and screening.

The clamping mechanism 4 comprises four clamping pieces 8 which are hung on the supporting and clamping frames 3 and used for clamping the supporting and clamping frames 3, a hanging groove is formed in the lower side of each clamping piece 8, a pair of clamping frames 9 are installed between each pair of clamping pieces 8, a gear disc chuck 10 is rotatably connected to the middle part between the pair of clamping frames 9 on the outer side of each clamping mechanism 4, clamping rollers 11 are arranged on the upper side and the lower side of the gear disc chuck 10, the gear disc chuck 10 is in meshing transmission with a transmission chain 12, the clamping rollers 11 are in rolling connection with the transmission chain 12, clamping pieces 17 are installed in the hanging groove, clamping bolts 13 penetrate through the front sides of the clamping pieces 8, the clamping bolts 13 are in threaded connection with the clamping pieces 8, the end parts of the clamping bolts 13 are rotatably connected with the centers of the side surfaces of the clamping pieces 17, a connecting cross rod is installed between the two clamping pieces 8 at the bottom, and a conveying roller 14 is installed between the two pairs of clamping frames 9, drive shaft of transfer roller 14 and the drive shaft fixed connection who is located the gear flower disc 10 of both sides, through installing holder 8 on supporting holding frame 3, thereby install fixture 4 on supporting holding frame 3, holder 8 and the 3 sliding connection of support holding frame simultaneously, make adjacent fixture 4's interval adjustable wantonly, thereby adjust the interval of adjacent transfer roller 14, after confirming the interval of each regional adjacent transfer roller 14, rotate clamping bolt 13, carry out the centre gripping to the lateral wall that supports holding frame 3 through holder 8 and holding piece 17, thereby fixed fixture 4.

The automatic impurity removing machine can screen spherical fruits such as jujube and the like to remove impurities, can screen any spherical object to remove impurities, and can screen any spherical object to remove impurities by adjusting the distance between the clamping mechanisms 4.

The supporting and clamping frame 3 is hollow, the cross section is in a square shape, the outer side surface of the supporting and clamping frame 3 is provided with a sliding groove 15, the groove width of the sliding groove 15 is consistent with the diameter of the clamping bolt 13, the upper part of one side of the supporting and clamping frame 3 close to the power motor 33 is provided with an installation through groove, the outer side of the supporting and clamping frame 3 close to the installation through groove is also provided with an installation groove 16, the groove width of the installation groove 16 is consistent with the diameter of the clamping bolt 13, the groove length of the installation through groove is consistent with the length of the clamping piece 17, the inner width of the supporting and clamping frame 3 is consistent with the width of the clamping piece 17, when the clamping mechanism 4 is mounted on the support and clamping frame 3 by the clamping member 8, the clamping bolt 13 passes through the mounting groove 16 into the sliding groove 15, the clamping piece 17 penetrates through the installation through groove to enter the interior of the supporting and clamping frame 3, and the clamping mechanism 4 is fixed through clamping of the clamping piece 8 and the clamping piece 17.

The driving mechanism comprises a motor box 7, the motor box 7 is arranged at the end parts of two supporting sliding frames 6, the two supporting sliding frames 6 are symmetrical about the motor box 7, the supporting sliding frames 6 are communicated with the motor box 7, a driving motor 20 is arranged inside the motor box 7, a transmission rod 21 is arranged on the upper side of the driving motor 20, two ends of the transmission rod 21 sequentially penetrate through the side wall of the motor box 7 and the side wall of the supporting sliding frames 6 and are rotatably connected with the two, the driving motor 20 is driven by the transmission rod 21 through a transmission gear, a lead screw 22 is rotatably connected at the center of the supporting sliding frames 6, two ends of the transmission rod 21 are respectively driven by the end parts of the two lead screws 22 through a bevel gear 23, a sliding block 24 is sleeved on the lead screw 22 in a threaded manner, supporting plates 19 are arranged at the tops of the two supporting sliding frames 6, a plurality of rollers which are uniformly distributed in an array are embedded at the lower sides of the supporting plates 19, and driving plates 26 are fixedly connected at the lower sides of two ends of each supporting plate 19, the transmission plate 26 that is located the outside is connected with sliding block 24 through the connecting block, sliding groove has been seted up in the outside of supporting carriage 6, sliding block 24 and sliding groove swing joint, install the washing stoving mechanism between the upside of backup pad 19 and two transmission plates 26 that are located the inboard, drive transfer line 21 through driving motor 20 and rotate, and then drive lead screw 22 and rotate, thereby remove sliding block 24, carry out reciprocating motion to the washing stoving mechanism through transmission plate 26 and backup pad 19 afterwards, thereby clear up each transfer roller 14, detach the debris that adheres to it on.

The cleaning and drying mechanism comprises instrument boxes 25, a pair of instrument boxes 25 are respectively arranged on two supporting plates 19, a brushless motor 27 is arranged in one instrument box 25, a water pump 28 is arranged in the other instrument box 25, a liquid guide pipe 29 is arranged between the two instrument boxes 25, one end of the liquid guide pipe 29 is fixedly connected with the outer side of one instrument box 25, the other end of the liquid guide pipe 29 penetrates through the other instrument box 25 and is communicated with the output end of the water pump 28 through a guide pipe, the input end of the water pump 28 is also communicated with an external water tank through another guide pipe, a plurality of spray heads 30 are arranged on the lower side of the liquid guide pipe 29 at equal intervals, a water blocking cover 31 is arranged on the upper side of the liquid guide pipe 29, a brush barrel 18 is arranged on the lower side of the liquid guide pipe 29, two ends of the brush barrel 18 are respectively and rotatably connected with the centers of the driving plates 26 on two sides, and the end part of a driving shaft of the brushless motor 27 and one end of the brush barrel 18 close to the brushless motor 27 are driven through a driving belt, the middle part of drive belt runs through the lower side box wall of apparatus box 25, the downside of brush section of thick bamboo 18 and transfer roller 14 butt, dryer 32 is installed through supporting the connecting rod in one side of apparatus box 25, when actuating mechanism reciprocating motion washs drying mechanism on supporting balladeur train 6, brushless motor 27 passes through the drive belt and drives brush section of thick bamboo 18 rotation, thereby the dust on clearance transfer roller 14, water pump 28 extracts the washing liquid from the basin afterwards, spout on transfer roller 14 and brush section of thick bamboo 18 through shower nozzle 30, strengthen the cleaning performance of washing liquid through brush section of thick bamboo 18, thereby get rid of adnexed spot, let in clear water again in the basin afterwards, detach the washing liquid, and utilize manger plate cover 31 to block the water droplet, prevent it from attaching on dryer 32, after finishing clearing up, start dryer 32, carry out the stoving to transfer roller 14, thereby keep the cleanliness factor on its surface.

The sorting basket is sequentially arranged into a first grid, a second grid, a so-called so as to be sorted.

One side that is close to power gear 34 also is provided with clamping frame 9, and clamping frame 9 is through by holder 8, the centre gripping subassembly that centre gripping bolt 13 and centre gripping piece 17 are constituteed is installed and is being supported the tip that clamping frame 3 is close to power gear 34, install a pair of centre gripping gyro wheel 11 that is the symmetry setting on the clamping frame 9, but gear flower disc 10 is not installed at the middle part of this clamping frame 9, every interval of centre gripping gyro wheel 11 all keeps unanimous with the diameter of gear flower disc 10, prevent through centre gripping gyro wheel 11 that gear flower disc 10 and drive chain 12 are at driven in-process separation, the centre gripping gyro wheel 11 that is close to power gear 34 simultaneously forms the chain centre gripping subassembly with power gear 34, thereby closely link to each other drive chain 12 and power gear 34, prevent to drop.

When the screening machine is used, a worker firstly provides power through the power motor 33 and uses the transmission mechanism consisting of the power gear 34, the transmission chain 12 and the clamping mechanism 4 to enable the transmission rollers 14 arranged on the clamping mechanism 4 to rotate at a constant speed, when a to-be-screened object is placed on the transmission roller 14 far away from one side of the power motor 33, sundries such as weeds fall into gaps between the adjacent transmission rollers 14 in a breaking way and fall into a first grid of a sorting basket to remove impurities, then the to-be-screened object is screened by taking the diameter as a standard along with the gradual increase of the length of the gaps between the adjacent transmission rollers 14 in different areas and falls into corresponding different grids in the sorting basket, and thus the impurity removal and the screening are completed;

when the clamping mechanism 4 is installed on the supporting and clamping frame 3 through the clamping piece 8, the clamping bolt 13 penetrates through the installation groove 16 to enter the sliding groove 15, the clamping piece 17 penetrates through the installation through groove to enter the inside of the supporting and clamping frame 3, the clamping mechanism 4 is fixed through clamping of the clamping piece 8 and the clamping piece 17, the clamping mechanism 4 is installed on the supporting and clamping frame 3 by installing the clamping piece 8 on the supporting and clamping frame 3, meanwhile, the clamping piece 8 is in sliding connection with the supporting and clamping frame 3, the distance between every two adjacent clamping mechanisms 4 can be adjusted at will, the distance between every two adjacent conveying rollers 14 is adjusted, after the distance between every two adjacent conveying rollers 14 in each area is determined, the clamping bolt 13 is rotated, the side wall of the supporting and clamping frame 3 is clamped through the clamping piece 8 and the clamping piece 17, and the clamping mechanism 4 is fixed;

the driving motor 20 drives the driving rod 21 to rotate, and further drives the screw rod 22 to rotate, so as to move the sliding block 24, and then the cleaning and drying mechanism is reciprocated through the driving plate 26 and the supporting plate 19, so as to clean each conveying roller 14 and remove the impurities attached thereon.

When the driving mechanism reciprocates on the supporting sliding frame 6 to clean and dry the mechanism, the brushless motor 27 drives the brush barrel 18 to rotate through the driving belt, thereby cleaning the dust on the conveying roller 14, then the water pump 28 extracts the cleaning liquid from the water tank, the cleaning liquid is sprayed on the conveying roller 14 and the brush barrel 18 through the spray head 30, the cleaning effect of the cleaning liquid is enhanced through the brush barrel 18, thereby removing the attached dirt, then the clear water is introduced into the water tank again, the cleaning liquid is removed, the water retaining cover 31 is utilized to block the water beads, the attachment on the dryer 32 is prevented, after the cleaning is finished, the dryer 32 is started, the conveying roller 14 is dried, and the cleanliness of the surface of the conveying roller is kept.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.