CN215381150U

CN215381150U - Automatic shellfish screening device

Info

Publication number: CN215381150U
Application number: CN202120809870.9U
Authority: CN
Inventors: 刘晓坤; 刘志刚; 潘铧康; 吴加莹; 张元�; 张柯馨
Original assignee: Guangdong Ocean University
Current assignee: Guangdong Ocean University
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-01-04
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses an automatic shellfish screening device which comprises a conveying mechanism, a screening mechanism and a power mechanism, wherein the screening mechanism comprises a frame formed by connecting an upright post, a top plate, a left side plate and a right side plate, a first-layer screening frame and a second-layer screening frame are arranged inside the frame, a fixed block is arranged at the top of the left side plate, a supporting moving rod is connected below the fixed block in a sliding manner, a first fixed plate and a second fixed plate are arranged on the side wall of the supporting moving rod, the first fixed plate and the second fixed plate are respectively connected with one end of the first-layer screening frame and one end of the second-layer screening frame, the other end of the first-layer screening frame and the other end of the second-layer screening frame are respectively connected with the power mechanism through a first guide plate and a second guide plate, and therefore the first-layer screening frame and the second-layer screening frame can move repeatedly in the left-right direction.

Description

Automatic shellfish screening device

Technical Field

The utility model belongs to the technical field of shellfish screening, and particularly relates to an automatic shellfish screening device.

Background

In shellfish sorting, marine shellfish is generally screened gradually according to specification and size, so that small-specification shellfish and large-specification shellfish are separated. The traditional screening mode is an artificial mode of placing marine shellfish on a screen with a certain mesh size to move back and forth, so that small-sized shellfish can pass through the screen to fall, large-sized shellfish can be left on the screen, and separation of large-sized shellfish and small-sized shellfish can be realized.

SUMMERY OF THE UTILITY MODEL

Aiming at the existing problems, the utility model provides an automatic shellfish screening device, which adopts semi-automation in the whole structure, thereby saving manpower and improving the shellfish screening efficiency and quality.

The technical scheme adopted by the utility model is as follows:

an automatic shellfish screening device comprises a conveying mechanism, a screening mechanism and a power mechanism, wherein the screening mechanism comprises a frame formed by connecting an upright post, a top plate, a left side plate and a right side plate, a funnel is arranged on the top plate and positioned below the conveying mechanism, a first-layer screening frame and a second-layer screening frame are arranged inside the frame, a first-layer shellfish containing box and a second-layer shellfish containing box are respectively arranged below the rear portions of the first-layer screening frame and the second-layer screening frame, a third-layer shellfish containing box is arranged right below the second-layer screening frame, sliding components are arranged at the bottoms of the first-layer shellfish containing box, the second-layer shellfish containing box and the third-layer shellfish containing box, the sliding components are connected with a rail below the sliding components in a sliding mode, a fixing block is arranged at the top of the left side plate, and a support moving rod is connected below the fixing block in a sliding mode, the lateral wall of the support moving rod is provided with a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are respectively connected with one ends of the first-layer screening frame and the second-layer screening frame, and the other ends of the first-layer screening frame and the second-layer screening frame are respectively connected with a power mechanism through a first guide plate and a second guide plate, so that the first-layer screening frame and the second-layer screening frame can move repeatedly in the left-right direction.

Preferably, the track includes backup pad and bottom plate, the backup pad is provided with two and fixes respectively on two stands with one side, the bottom plate also is provided with even and installs respectively at the both ends of two backup pads, installs the tooth guide rail on two bottom plates respectively, the relative roll connection of slip subassembly and tooth guide rail.

Preferably, the sliding assembly is provided with two sliding assemblies, the two sliding assemblies respectively comprise two first shellfish containing boxes or two second shellfish containing boxes or two sides of the bottom wall of the third shellfish containing box, the sliding assembly comprises a first mounting plate, a second mounting plate and a third mounting plate, the first mounting plate is an L-shaped steel plate, the second mounting plate is tightly attached to the inner side wall of the vertical section of the L-shaped steel plate, the second mounting plate is a plate frame structure with a notch at the upper side formed by bending the steel plate for multiple times, a second motor is arranged inside the plate frame structure, the output shaft of the second motor is connected with one end of a worm through a coupler, the other end of the worm is rotatably connected with a mounting block, the mounting block is arranged on the third mounting plate, the third mounting plate is of a channel steel structure, the upper wall of the third mounting plate is fixed on the horizontal section of the first mounting plate through bolts, and the worm is meshed with a gear below the worm, the gear is connected with a fixed rod through a bearing, the fixed rod is arranged on the vertical section of the first mounting plate, and the gear is further meshed with a tooth guide rail below the gear.

Preferably, be provided with the opening sliding tray down on the diapire of fixed block, the inside guide arm that is provided with of sliding tray, the both ends of guide arm respectively with the both ends inner wall connection of sliding tray, open-ended both sides wall is provided with first mounting groove respectively, be provided with a plurality of equidistant movable pulleys along the length direction of its sliding tray in the first mounting groove, the upper end that supports the carriage release lever is located the sliding tray, and its upper end is provided with the perforation, the guide arm runs through this perforation, be provided with four at least openings on the fenestrate inner wall towards the second mounting groove of guide arm, on four second mounting groove symmetries were provided with the inner wall of hole, all be provided with compression spring in every second mounting groove and lead the pearl, lead the outer wall and the guide arm rolling contact of pearl, be provided with on the lateral wall that supports the carriage release lever with movable pulley sliding contact arc sand grip.

Preferably, the size of the left side plate is smaller than that of the right side plate, and the left side plate is provided with a guide hole through which the first guide plate and the second guide plate pass.

Preferably, the first layer of screening frame and the second layer of screening frame are both distributed in an inclined mode, the inclination angle of the first layer of screening frame and the inclination angle of the second layer of screening frame are 30 degrees, and the aperture on the first layer of screening frame is larger than the aperture on the second layer of screening frame.

Preferably, power unit includes four erection columns, is provided with the twice slide rail on two erection columns of homonymy, is provided with first motor between four erection columns, first motor is through two sets of mounting and two front and back erection column fixed connection, the output shaft upper end of first motor is provided with the carousel, be provided with the spliced pole on the outer ring of carousel, the spliced pole is rotated with dwang one end and is connected, and its other end is connected with the horizontal migration subassembly.

Preferably, the horizontal moving assembly comprises a vertical connecting rod, a first connecting rod, a second connecting rod, a third connecting rod, an intermediate connecting rod and a fourth connecting rod, wherein the upper end and the lower end of the vertical connecting rod are respectively provided with a first connecting block, the first connecting rod and the second connecting rod respectively penetrate through the two first connecting blocks, two ends of the first connecting rod and the second connecting rod are respectively provided with a roller wheel, the other end of the rotating rod is sleeved on the vertical connecting rod, one end of the intermediate connecting rod is fixedly connected with the first connecting block, the other end of the intermediate connecting rod is fixedly connected with the second connecting block, the third connecting rod penetrates through the second connecting block, the other second connecting block is arranged below the third connecting rod, the fourth connecting rod penetrates through the second connecting block, a connecting plate is arranged between the two second connecting blocks, the first guide plate and the second guide plate are fixed on the side wall of the connecting plate, and two ends of the third connecting rod and the fourth connecting rod are respectively provided with a roller wheel, the rollers at the two ends of the first connecting rod and the second connecting rod are respectively positioned in the two slide rails on the same level at the upper end of the mounting column, and the rollers at the two ends of the third connecting rod and the fourth connecting rod are respectively positioned in the two slide rails on the same level at the lower end.

Preferably, the mounting includes first hoop board and second hoop board, first hoop board and second hoop board are reverse symmetry and set up in the front and back both sides of first motor, the both ends of first hoop board and second hoop board are all fixed through the bolt, inject first motor between first hoop board and second hoop board, the tip of the extension board of first hoop board and second hoop board has L type even board through the bolt fastening, L type even board passes through the screw rod and is connected with the erection column, and all is provided with the connecting plate between the extension board of two first hoop boards and the extension board of two second hoop boards.

Preferably, the conveying mechanism comprises a support and a conveying belt, the conveying belt is arranged on the support and used for conveying the shellfish, and the funnel is located below the upper end of the conveying belt.

The utility model has the beneficial effects that:

the automatic shellfish screening device designed by the utility model comprises a conveying mechanism, a screening mechanism and a power mechanism, wherein the conveying mechanism adopts a conveying belt, scallops are conveyed to the upper part of the screening mechanism from a lower part and are conveyed through a funnel, the scallops conveyed on the conveying belt are conveyed into a screening frame, the screening frame is divided into a first layer of screening frame and a second layer of screening frame, the two layers of screening frames are obliquely arranged, the inclination angle of the screening frames is designed to be 30 degrees, the two layers of screening frames swing under the action of the power mechanism simultaneously to separate the scallops, the specification of the remaining lower layer of the scallops is smaller, the scallops on each layer automatically slide down along a slope and fall into a shellfish collecting box at the rear lower part, and buffer materials such as sponge pads are arranged in the shellfish collecting box, so that the phenomenon that the scallops are crushed due to too large impact force in the falling process is reduced. Meanwhile, the power mechanism is utilized to drive the sieving net to swing left and right, so that classification of the scallops on the sieving net is accelerated, the scallops are rapidly classified into a large type, a medium type and a small type, the whole process is mechanized, the sieving efficiency is improved, and the labor cost is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a structural view of an automatic shellfish sorting apparatus according to the present invention;

FIG. 2 is an exploded view of the sifting mechanism;

FIG. 3 is a top, left side and right side view of the sifting mechanism;

FIG. 4 is a block diagram of the slide assembly;

FIG. 5 is a side view of the slide assembly;

FIG. 6 is a cross-sectional view of the attachment of the fixed block to the support travel bar;

FIG. 7 is a cross-sectional view of a fixation block;

FIG. 8 is a cross-sectional view of the support travel bar;

figure 9 is a side view of the power mechanism;

FIG. 10 is a block diagram of a horizontal motion assembly;

FIG. 11 is a top view of the turntable;

fig. 12 is a top view of the fastener.

1. A transport mechanism; 2. a screening mechanism; 201. a column; 202. a top plate; 203. a left side plate; 204. a right side plate; 205. a first layer screening frame; 206. a second layer screening frame; 207. a first layer of shellfish containing box; 208. a second layer of shellfish containing box; 209. a third layer of shellfish containing box; 3. a power mechanism; 301. mounting a column; 302. a slide rail; 303. a first motor; 304. a turntable; 305. connecting columns; 306. a fixing member; 307. rotating the rod; 308. a vertical connecting rod; 309. a first connection block; 310. a first link; 311. a second link; 312. a roller; 313. a middle connecting rod; 314. a second connecting block; 315. a third link; 316. connecting plates; 317. a fourth link; 318. a first guide plate; 319. a second guide plate; 4. a support; 5. a funnel; 6. a fixed block; 601. a sliding groove; 602. a first mounting groove; 603. a guide bar; 604. a sliding wheel; 7. supporting the movable rod; 701. perforating; 702. a second mounting groove; 703. a compression spring; 704. conducting beads; 705. arc-shaped convex strips; 8. a first fixing plate; 9. a second fixing plate; 10. a sliding assembly; 1001. a first mounting plate; 1002. a second mounting plate; 1003. a second motor; 1004. a worm; 1005. mounting blocks; 1006. a gear; 1007. fixing the rod; 1008. a third mounting plate; 11. a support plate; 12. a tooth guide rail; 13. a movable plate; 14. a connecting plate; 15. a first strap; 16. a second strap; 17. an L-shaped connecting plate; 18. a screw; 19. and (4) bolts.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model particularly provides an automatic shellfish screening device which comprises a conveying mechanism 1, a screening mechanism 2 and a power mechanism 3 as shown in figure 1.

Specifically, as shown in fig. 2 and 3, the screening mechanism 2 includes a frame formed by connecting a vertical column 201, a top plate 202, a left side plate 203 and a right side plate 204, the left side plate 203 is smaller than the right side plate 204 in size, a funnel 5 is disposed on the top plate 202, the funnel 5 is located below the conveying mechanism 1, a first layer of screening frame 205 and a second layer of screening frame 206 are disposed inside the frame, a first layer of shellfish holding box 207 and a second layer of shellfish holding box 208 are respectively disposed below the first layer of screening frame 205 and the second layer of screening frame 206, a third layer of shellfish holding box 209 is disposed right below the second layer of screening frame 206, sliding assemblies 10 are disposed at the bottoms of the first layer of shellfish holding box 207, the second layer of shellfish holding box 208 and the third layer of shellfish holding box 209, the sliding assemblies 10 are slidably connected with a rail below the sliding assemblies, a fixing block 6 is disposed at the top of the left side plate 203, fixed block 6 below sliding connection has support carriage release lever 7, be provided with first fixed plate 8 and second fixed plate 9 on the lateral wall of support carriage release lever 7, first fixed plate 8 and second fixed plate 9 are connected with first layer screening frame 205 and second layer screening frame 206 one end respectively, and the other end of first layer screening frame 205 and second layer screening frame 206 is connected with power unit through first baffle 318 and second baffle 319 respectively to realize that first screening frame 205 and second screening frame 206 left and right sides direction removes repeatedly. Wherein, the left side plate 203 is provided with a guide hole through which the first guide plate 318 and the second guide plate 319 pass.

In this embodiment, the track includes backup pad 11 and bottom plate, backup pad 11 is provided with two and fixes respectively on two stands 201 with one side, the bottom plate also is provided with even and installs respectively at the both ends of two backup pads 11, installs tooth guide rail 12 on two bottom plates respectively, sliding assembly 10 and the relative roll connection of tooth guide rail 12.

As shown in fig. 4 and 5, the bottoms of the first layer shellfish holding box 207, the second layer shellfish holding box 208 and the third layer shellfish holding box 209 are all provided with two sliding assemblies 10, each sliding assembly 10 below each shellfish holding box comprises a first mounting plate 1001, a second mounting plate 1002 and a third mounting plate 1008, the first mounting plate 1001 is an L-shaped steel plate, the second mounting plate 1002 is arranged to be closely attached to the inner side wall of the vertical section of the L-shaped steel plate, the second mounting plate 1002 is a plate frame structure formed by bending the steel plate for multiple times and provided with a notch on the upper side, a second motor 1003 is arranged inside the plate frame structure, the output shaft of the second motor 1003 is connected with one end of a worm 1004 through a coupler, the other end of the worm 1004 is rotatably connected with a mounting block 1005, the mounting block 1005 is arranged on the third mounting plate 1008, and the third mounting plate 1008 is a channel steel structure, the upper wall of the worm gear is fixed on the horizontal section of the first mounting plate 1001 through bolts, the worm gear 1004 is meshed with a gear 1006 below the worm gear, the gear 1006 is connected with a fixing rod 1007 through a bearing, the fixing rod 1007 is arranged on the vertical section of the first mounting plate 1001, and the gear 1006 is also meshed with the tooth guide rail 12 below the fixing rod. Wherein, the bottom of gear 1006 is located the below of the bottom of first mounting panel 1001, starts second motor 1003, then by worm 1004 and gear 1006 meshing to drive gear 1006 and remove on tooth guide rail 12, thereby realize holding the shellfish and remove to the screening mechanism 2 outside with the shellfish, and first layer shellfish holds box 207, second floor shellfish and holds box 208 and the right side board that third layer shellfish held box 209 all through the movable rod with preceding curb plate rotation connection, make things convenient for personnel to hold the scallop in the box and take off from the right side, be convenient for the packing.

As shown in fig. 6, 7 and 8, in this embodiment, a sliding groove 601 with a downward opening is disposed on the bottom wall of the fixed block 6, a guide rod 603 is disposed inside the sliding groove 601, two ends of the guide rod 603 are respectively connected with inner walls of two ends of the sliding groove 601, two side walls of the opening are respectively provided with a first mounting groove 602, a plurality of sliding wheels 604 with equal intervals are disposed in the first mounting groove 602 along the length direction of the sliding groove 601, the upper end of the supporting moving rod 7 is disposed in the sliding groove 601, the upper end of the supporting moving rod 7 is provided with a through hole 701, the guide rod 603 penetrates through the through hole 701, at least four second mounting grooves 702 with openings facing the guide rod 603 are disposed on the inner wall of the through hole 701, four second mounting grooves 702 are symmetrically disposed on the inner wall of the inner hole 701, each second mounting groove 702 is provided with a compression spring 703 and a guide ball 704, the outer wall of the guide ball 704 is in rolling contact with the guide rod 603, therefore, the contact between the inner wall of the through hole 701 and the circular surface of the outer wall of the guide rod 603 is changed into the rolling contact between the guide ball 704 and the outer wall of the guide rod 603, so that the friction force for supporting the relative sliding between the movable rod 7 and the fixed block 6 is reduced, and the sliding stability is improved. Secondly, the side wall of the support moving rod is provided with an arc-shaped convex strip 705 which is in sliding contact with the moving wheel, so that the contact area of the support moving rod 7 and the inner wall of the sliding groove 601 is further reduced, the sliding smoothness is improved, and the service life of the support moving rod is prolonged.

In this embodiment, the first layer of screening frames 205 and the second layer of screening frames 206 are both distributed in an inclined manner, the inclined angle is 30 °, and the aperture of the first layer of screening frames 205 is larger than that of the second layer of screening frames 206. The first-layer screening frame 205 and the second-layer screening frame 206 are distributed obliquely, so that scallops can be conveniently classified and can fall into the shellfish containing box at the rear lower part along the oblique direction, and damage to the scallops in the classifying process is reduced. The large-size scallops are classified on the first layer of the screening frame by utilizing the aperture, the medium-size scallops are classified on the second layer of the screening frame, and the small-size scallops fall into the third layer of the shellfish screening frame below. The classification of the large, medium and small scallop is completed.

As shown in fig. 9 and 11, the power mechanism 3 includes four mounting posts 301, two slide rails 302 are provided on two mounting posts 301 on the same side, a first motor 303 is provided between the four mounting posts 301, the first motor 303 is fixedly connected with the front and rear mounting posts 301 through two sets of fixing members 306, a rotary disc 304 is provided at the upper end of an output shaft of the first motor 303, a connecting post 305 is provided on an outer circular ring of the rotary disc 304, the connecting post 305 is rotatably connected with one end of a rotating rod 307, and a horizontal moving assembly is connected to the other end of the connecting post.

As shown in fig. 10, the horizontal moving assembly includes a vertical connecting rod 308, a first connecting rod 309, a second connecting rod 311, a third connecting rod 315, a middle connecting rod 313 and a fourth connecting rod 317, the upper and lower ends of the vertical connecting rod 308 are respectively provided with a first connecting block 310, the first connecting rod 309 and the second connecting rod 311 respectively penetrate through the two first connecting blocks 310, two ends of the first connecting rod 309 and the second connecting rod 311 are respectively provided with a roller 312, the other end of the rotating rod 307 is sleeved on the vertical connecting rod 308, one end of the middle connecting rod 313 is fixedly connected with the first connecting block 309, the other end thereof is fixedly connected with the second connecting block 314, the third connecting rod 315 penetrates through the second connecting block 314, the other second connecting block 314 is arranged below the third connecting rod 315, the fourth connecting rod 317 penetrates through the second connecting block 314, and a connecting plate 316 is arranged between the two second connecting blocks 214, the first guide plate 318 and the second guide plate 319 are fixed on the side wall of the connecting plate 316, rollers 312 are respectively arranged at two ends of the third connecting rod 315 and the fourth connecting rod 317, the rollers 312 at two ends of the first connecting rod 309 and the second connecting rod 311 are respectively located in the two slide rails 302 on the same level at the upper end of the mounting column, and the rollers 312 at two ends of the third connecting rod 315 and the fourth connecting rod 317 are respectively located in the two slide rails 302 on the same level at the lower end. The first motor 303 is started to drive the turntable 304 above to rotate, and then the rotating rod 307 drives the horizontal moving component to horizontally move back and forth along the sliding rail 302, so that the left and right swinging of the first-layer screening frame 205 and the second-layer screening frame 206 is realized under the matching of the supporting moving rod 7 and the fixed block 6, the automatic classification of the scallops is realized, the classification efficiency is improved, and the labor cost is saved.

As shown in fig. 12, in this embodiment, the fixing member 305 includes a first hoop plate 15 and a second hoop plate 16, the first hoop plate 5 and the second hoop plate 6 are oppositely and symmetrically disposed on the front and rear sides of the first motor 303, both ends of the first hoop plate 5 and the second hoop plate 6 are fixed by bolts 19, the first motor 303 is limited between the first hoop plate 15 and the second hoop plate 16, the ends of the extension plate of the first hoop plate 15 and the extension plate of the second hoop plate are fixed by an L-shaped connecting plate 17 through bolts 19, the L-shaped connecting plate 17 is connected with the mounting column 301 through a screw 18, and a connecting plate 14 is disposed between the extension plates of the two first hoop plates 15 and the extension plates of the two second hoop plates 16. Utilize first hoop board 15, second hoop board 16 and L type even board 17 to realize being connected between first motor 303 and erection column 301 through bolt 19, simultaneously, show the unsettled stability of improvement first motor 303.

In this embodiment, transport mechanism 1 includes support 4 and conveyer belt, the conveyer belt sets up on the support, is provided power by the motor, realizes the transmission for the conveying shellfish, funnel 5 is located the below of conveyer belt upper end for receive shellfish, can set up the cloth section of thick bamboo in the below of funnel, reduces the distance of port and first layer screening frame under the funnel, prolongs the buffer distance that the scallop dropped in-process, reduces the damage of scallop.

And (3) a classification process:

the scallop is conveyed to the transmission belt manually, the transmission belt is started, the scallop at the lower position is conveyed to the upper part of the funnel, the scallop in the funnel is conveyed to the first layer of screening frame below through the cloth cylinder, the scallop of the small specification class falls into the second layer of screening frame below from the hole of the scallop due to the large aperture on the first layer of screening frame, the second layer classification is carried out, the scallop of the smaller specification class falls into the third layer of shellfish containing box below, the large specification scallop falling on the first layer of screening frame slides to the first layer of shellfish containing box below along the inclined plane, and the scallop of the medium specification class slides to the second layer of shellfish containing box below along the inclined plane of the second layer of screening frame. In the process, the first motor is started, the horizontal moving assembly is driven by the turntable above to horizontally move back and forth along the sliding rail, the left and right swinging of the first-layer screening frame and the second-layer screening frame is realized by the matching of the fixed block and the supporting moving rod, the scallop classification speed is accelerated, the scallop classification efficiency is improved, the automation is adopted in the classification process, and the labor cost is saved.

The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. An automatic shellfish screening device is characterized by comprising a conveying mechanism, a screening mechanism and a power mechanism, wherein the screening mechanism comprises a frame formed by connecting a stand column, a top plate, a left side plate and a right side plate, a funnel is arranged on the top plate and positioned below the conveying mechanism, a first-layer screening frame and a second-layer screening frame are arranged inside the frame, a first-layer shellfish containing box and a second-layer shellfish containing box are respectively arranged below the rear portions of the first-layer screening frame and the second-layer screening frame, a third-layer shellfish containing box is arranged right below the second-layer screening frame, sliding assemblies are arranged at the bottoms of the first-layer shellfish containing box, the second-layer shellfish containing box and the third-layer shellfish containing box and are in sliding connection with a rail below the sliding assemblies, a fixing block is arranged at the top of the left side plate, a support moving rod is in sliding connection below the fixing block, the lateral wall of the support moving rod is provided with a first fixing plate and a second fixing plate, the first fixing plate and the second fixing plate are respectively connected with one ends of the first-layer screening frame and the second-layer screening frame, and the other ends of the first-layer screening frame and the second-layer screening frame are respectively connected with a power mechanism through a first guide plate and a second guide plate, so that the first-layer screening frame and the second-layer screening frame can move repeatedly in the left-right direction.

2. The automatic shellfish screening device according to claim 1, wherein said track comprises a support plate and a bottom plate, said support plate is provided with two and fixed on two posts at the same side, said bottom plate is also provided with two and installed at two ends of two support plates, respectively, two tooth guide rails are installed on two bottom plates, respectively, said sliding assembly is connected with tooth guide rails in a relatively rolling manner.

3. The automatic shellfish screening device according to claim 2, wherein the sliding assembly comprises two sliding assemblies, the two sliding assemblies are respectively arranged at two sides of the bottom wall of the first shellfish holding box, the second shellfish holding box or the third shellfish holding box, the sliding assembly comprises a first mounting plate, a second mounting plate and a third mounting plate, the first mounting plate is an L-shaped steel plate, the second mounting plate is arranged close to the inner side wall of the vertical section of the L-shaped steel plate, the second mounting plate is a plate frame structure formed by bending the steel plate for multiple times and provided with a notch at the upper side, a second motor is arranged inside the plate frame structure, the output shaft of the second motor is connected with one end of a worm through a coupler, the other end of the worm is rotatably connected with a mounting block, the mounting block is arranged on the third mounting plate, the third mounting plate is of a channel steel structure, and the upper wall of the third mounting plate is fixed on the horizontal section of the first mounting plate through bolts, the worm meshes with the gear below the worm, the gear is connected with the fixed rod through the bearing, the fixed rod is arranged on the vertical section of the first mounting plate, and the gear is meshed with the tooth guide rail below the gear.

4. The automatic shellfish screening device as recited in claim 1, wherein a slide groove with a downward opening is formed on the bottom wall of said fixed block, a guide rod is arranged in the sliding groove, two ends of the guide rod are respectively connected with the inner walls of two ends of the sliding groove, two side walls of the opening are respectively provided with a first mounting groove, a plurality of sliding wheels with equal intervals are arranged in the first mounting groove along the length direction of the sliding groove, the upper end of the supporting movable rod is positioned in the sliding groove, the upper end of the guide rod is provided with a through hole, the guide rod penetrates through the through hole, the inner wall of the through hole is provided with at least four second mounting grooves with openings facing the guide rod, the four second mounting grooves are symmetrically provided with inner walls of inner holes, each second mounting groove is internally provided with a compression spring and a guide ball, the outer wall of the guide bead is in rolling contact with the guide rod, and arc-shaped convex strips in sliding contact with the moving wheels are arranged on the side wall of the support moving rod.

5. An automatic shellfish screening apparatus according to claim 1, wherein said left side plate is smaller in size than the right side plate, and a guide hole through which the first guide plate and the second guide plate pass is provided on said left side plate.

6. The automatic shellfish screening apparatus of claim 1, wherein said first and second screening frames are disposed at an angle of 30 ° and the aperture of said first screening frame is larger than the aperture of said second screening frame.

7. The automatic shellfish screening device as claimed in claim 1, wherein the power mechanism comprises four mounting posts, two slide rails are arranged on two mounting posts on the same side, a first motor is arranged between the four mounting posts, the first motor is fixedly connected with the front and rear mounting posts through two sets of fixing members, a rotary table is arranged at the upper end of an output shaft of the first motor, a connecting post is arranged on an outer ring of the rotary table, the connecting post is rotatably connected with one end of a rotating rod, and a horizontal moving assembly is connected to the other end of the connecting post.

8. The automatic shellfish screening device according to claim 7, wherein the horizontal moving assembly comprises a vertical connecting rod, a first connecting rod, a second connecting rod, a third connecting rod, a middle connecting rod and a fourth connecting rod, wherein the upper and lower ends of the vertical connecting rod are respectively provided with the first connecting block, the first connecting rod and the second connecting rod respectively penetrate through the two first connecting blocks, the two ends of the first connecting rod and the second connecting rod are respectively provided with a roller, the other end of the rotating rod is sleeved on the vertical connecting rod, one end of the middle connecting rod is fixedly connected with the first connecting block, the other end of the middle connecting rod is fixedly connected with the second connecting block, the third connecting rod penetrates through the second connecting block, the other second connecting block is arranged below the third connecting rod, the fourth connecting rod penetrates through the second connecting block, a connecting plate is arranged between the two second connecting blocks, and the first guide plate and the second guide plate are fixed on the side wall of the connecting plate, the roller wheels are arranged at the two ends of the third connecting rod and the fourth connecting rod, the roller wheels at the two ends of the first connecting rod and the second connecting rod are respectively positioned in the two slide rails on the same level at the upper end of the mounting column, and the roller wheels at the two ends of the third connecting rod and the fourth connecting rod are respectively positioned in the two slide rails on the same level at the lower end.

9. The automatic shellfish screening device according to claim 7, wherein the fixing member comprises a first hoop plate and a second hoop plate, the first hoop plate and the second hoop plate are oppositely and symmetrically arranged on the front side and the rear side of the first motor, two ends of the first hoop plate and two ends of the second hoop plate are fixed by bolts, the first motor is limited between the first hoop plate and the second hoop plate, the ends of the extension plates of the first hoop plate and the second hoop plate are fixed by bolts with L-shaped connecting plates, the L-shaped connecting plates are connected with the mounting columns by screws, and connecting plates are arranged between the extension plates of the two first hoop plates and the extension plates of the two second hoop plates.

10. An automatic shellfish screening apparatus according to claim 1, wherein said conveyor means comprises a frame and a conveyor belt disposed on the frame for conveying shellfish, said hopper being located below the upper end of the conveyor belt.