CN113477514A - Medicinal material sieving mechanism - Google Patents

Abstract

The invention discloses a medicinal material screening device, wherein a dustproof shell with a feed inlet is arranged at the top of a rack, the dustproof shell covers the top of a vibrating screen assembly, a moving mechanism is arranged in the dustproof shell, the movable end of the moving mechanism is fixedly connected with a baffle, one side of the baffle, which is close to the feed inlet, is rotatably connected with a striking mechanism, the striking mechanism is provided with a pulling mechanism, cleaning bristles are arranged at one side of the baffle, which is close to the striking mechanism, a lifting structure is arranged at one side of the baffle, a telescopic cylinder is arranged on the baffle, the bottom of the baffle is slidably connected with a brush plate, the telescopic cylinder drives the lifting structure to intermittently move between the baffle and the striking mechanism, during cleaning, the moving mechanism drives the baffle to repeatedly move, the telescopic cylinder drives the brush plate to be clung to the surface of a screen mesh to move, and the pulling mechanism drives the striking structure to repeatedly rotate on the cleaning bristles. The invention can clean the screen mesh and the beating block, and can crush the caked medicinal materials by utilizing the beating block to enhance the screening effect.

Description

Medicinal material sieving mechanism

Technical Field

The invention belongs to the field of traditional Chinese medicine screening, and relates to a medicinal material screening device.

Background

The decoction pieces refer to a traditional Chinese medicine which is processed into a certain shape according to the requirement and can be directly used in the clinical traditional Chinese medicine. After being processed in the producing area, the traditional Chinese medicine is cut into slices, thick slices, inclined slices, threads, segments, blocks and other specifications according to the property of the traditional Chinese medicine and the medical requirement, so that the effective ingredients of the traditional Chinese medicine are easy to dissolve out, and other processing, storage, dispensing and the like are convenient, and the traditional Chinese medicine is called as decoction pieces. The traditional Chinese medicine decoction pieces are prepared from traditional Chinese medicines according to the traditional Chinese medicine theory and the traditional Chinese medicine preparation method, and can be directly used as traditional Chinese medicines in traditional Chinese medicine clinical practice. In the processing preparation process of sliced medicinal herbs, need get rid of the unnecessary impurity of sliced medicinal herbs the inside through the vibration screening machine, when screening the more traditional chinese medicine of powder, more powder can be stayed on the surface of screen cloth after the vibration screening, influences the screening of follow-up medicinal material to if traditional chinese medicine powder caking is together, the shale shaker can not give the medicine end of caking and shake away, influences the screening efficiency of medicinal material.

Disclosure of Invention

The invention aims to provide a medicinal material screening device, which aims to solve the problems that when a vibrating screen in the prior art screens more traditional Chinese medicines, more powder is accumulated on the surface of the screen after vibrating screening, the screening of the subsequent medicinal materials is influenced, and if the traditional Chinese medicine powder is agglomerated together, the agglomerated medicinal powder cannot be vibrated away by the vibrating screen, and the screening efficiency of the medicinal materials is influenced.

The medicinal material screening device comprises a vibrating screen assembly with a screen and a cleaning assembly, wherein the vibrating screen assembly is arranged on a rack, the top of the rack is also provided with a dustproof shell with a feed inlet, the dustproof shell covers the top of the vibrating screen assembly, the cleaning assembly comprises a moving mechanism, a striking mechanism and a cleaning mechanism, the moving mechanism is arranged in the dustproof shell, the movable end of the moving mechanism is fixedly connected with a baffle, a feeding gap is reserved between the baffle and the screen, one side of the baffle, which is close to the feed inlet, is rotatably connected with the striking mechanism, the striking mechanism is provided with a pulling mechanism, one side of the baffle, which is close to the striking mechanism, is provided with cleaning bristles, one side of the baffle is provided with a lifting structure, and a telescopic cylinder is arranged on the baffle, the bottom of the baffle is slidably connected with a brush plate, and during screening, the telescopic cylinder drives the lifting structure to intermittently move to the position between the baffle and the striking mechanism, during cleaning, the moving mechanism drives the baffle to repeatedly move along the length direction of the dustproof shell, the telescopic cylinder drives the brush plate to be tightly attached to the surface of the screen cloth to move, and the pulling mechanism drives the striking structure to repeatedly rotate on the cleaning bristles.

Preferably, hit the mechanism including hitting piece, damping axle and limiting plate, pulling mechanism includes two reset coil springs, the baffle is close to one side symmetry of feed inlet and is equipped with two limiting plates, rotates between two limiting plates and is connected with the damping axle, the bottom of damping axle is rotated along its length direction and is connected with a plurality of pieces of hitting, the both ends of damping axle are a reset coil spring of fixedly connected with respectively, the tip fixed connection of two reset coil springs to the dust cover.

Preferably, the middle part of baffle is opened there is a cavity, the interior top fixedly connected with of cavity telescopic cylinder, open the bottom of baffle has a spacing groove, the spacing inslot is equipped with a brush board, brush board towards one side fixedly connected with slide bar of cavity just in the top of slide bar extends to the cavity, be equipped with the piece that resets on the slide bar, telescopic cylinder extrudes brush board downwards and makes the brush hair on the brush board paste on the surface of screen cloth.

Preferably, elevation structure includes L template, dead lever and lifter plate, a fixed slot has still been opened to one side of cavity, the inside fixed dead lever of fixed slot, sliding connection has an L template on the dead lever, the horizontal part of L template with be equipped with the spring between the bottom of fixed slot just the spring housing is established on the dead lever, be equipped with a limit structure on the L template horizontal part the vertical portion of L template stretches out the fixed slot just the bottom fixedly connected with lifter plate of the vertical portion of L template, a plurality of pieces of stabbing in the bottom of lifter plate, it drives the whole downstream of L template and makes and stab the piece and move to the baffle and hit between the piece to push down limit structure when telescopic cylinder descends.

Preferably, limit structure includes spacing hole, it has a spacing hole to open on the L template horizontal part, telescopic cylinder's expansion end fixedly connected with clamp plate, one side that the clamp plate is close to the fixed slot is equipped with a briquetting, the edge of briquetting is equipped with an elastic rubber pad, the briquetting is established the top in spacing hole, when telescopic cylinder drives the clamp plate and pushes down, the briquetting is pressed at spacing hole top and elastic rubber pad pressure at the edge in spacing hole, and the briquetting passes when the briquetting lasts to push down spacing hole.

Preferably, the piece that resets includes reset spring and reset ring, be equipped with reset ring and reset spring on the slide bar, reset spring establishes between the interior diapire of reset ring and cavity.

Preferably, the shale shaker subassembly includes sieve case, damping spring and vibrating motor, the sieve case is the slope structure just the sieve case with be equipped with damping spring between the frame, the inside fixedly connected with screen cloth that also inclines of sieve case, the high side position of screen cloth is in the below of feed inlet, open the bottom of sieve case has the discharge gate, the bottom of sieve case is equipped with vibrating motor.

The invention has the following advantages:

(1) the invention is provided with the vibrating screen component, the medicinal materials are poured into the screen box from the feeding port of the dustproof shell, the vibrating motor drives the screen box to vibrate, the medicinal materials are further screened by the screen, the small-particle medicinal materials pass through the through holes on the surface of the screen, the large-particle medicinal materials stay on the surface of the screen, if the medicinal materials are agglomerated, the agglomerated medicinal materials can be accumulated on one side of the baffle plate, in the vibrating process of the screen, the agglomerated medicinal materials are driven by the screen to move towards the beating block direction, the beating block can break up the agglomerated medicinal materials, then the screening is carried out, so that the screening degree of the medicinal materials is higher, the blocking of the screen holes by the agglomerated medicinal materials can be avoided, after the screening is finished, the moving mechanism drives the baffle plate to move along the screen, the telescopic cylinder drives the brush plate to move close to the surface of the screen, the powder remained on the surface of the screen is cleaned, when the baffle plate moves, the pulling mechanism drives the striking mechanism to rotate, so that the striking mechanism can be repeatedly attached to the cleaning bristles, and the cleaning bristles are used for cleaning the residual medicine powder on the surface of the striking mechanism.

(2) When the screening, in order to avoid hitting to block and go into too big caking medicinal material between the baffle, utilize telescopic cylinder to drive elevation structure intermittent type nature motion to the baffle and hit between the mechanism, and then utilize the elevating system crushing to hit remaining caking medicinal material between block and the baffle, can avoid the feeding clearance to be blockked up like this to the screening medicinal material that can the full aspect, screening efficiency is higher.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the internal structure of the dust cap of fig. 1.

Fig. 3 is a schematic structural view of a baffle plate in the structure shown in fig. 2.

FIG. 4 is a schematic view of the internal structure of the baffle plate in the structure shown in FIG. 3;

FIG. 5 is a schematic structural view of an L-shaped plate of the structure of FIG. 4;

fig. 6 is a schematic structural view of a platen in the structure shown in fig. 4.

The labels in the figures are: 1. a frame; 2. a screen box; 3. screening a screen; 4. a vibration motor; 5. a moving mechanism; 6. a moving motor; 7. a screw rod; 8. a baffle plate; 9. a feed inlet; 10. a dust-proof shell; 11. a limiting plate; 12. A damping shaft; 13. striking a block; 14. a reset coil spring; 15. cleaning the bristles; 16. a cavity; 17. pressing a plate; 18. Briquetting; 19. an elastic rubber pad; 20. fixing grooves; 21. an L-shaped plate; 22. fixing the rod; 23. a spring; 24. A lifting plate; 25. a seal block; 26. a slide bar; 27. a return spring; 28. a reset ring; 29. a discharge port; 30. A brush plate; 31. a telescopic cylinder; 32. and a limiting hole.

Detailed Description

The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.

As shown in fig. 1-6, the invention provides a medicinal material screening device, which comprises a vibrating screen assembly with a screen 3 and a cleaning assembly, wherein the vibrating screen assembly is arranged on a frame 1, the top of the frame 1 is also provided with a dustproof shell 10 with a feed port 9, the dustproof shell 10 covers the top of the vibrating screen assembly, the cleaning assembly comprises a moving mechanism, a striking mechanism and a cleaning mechanism, the moving mechanism 5 is arranged in the dustproof shell 10, the movable end of the moving mechanism 5 is fixedly connected with a baffle plate 8, a feed gap is reserved between the baffle plate 8 and the screen 3, one side of the baffle plate 8 close to the feed port 9 is rotatably connected with the striking mechanism, the striking mechanism is provided with a pulling mechanism, one side of the baffle plate 8 close to the striking mechanism is provided with cleaning bristles 15, one side of the baffle plate 8 is provided with a lifting structure, and the baffle plate 8 is provided with a telescopic cylinder 31, the bottom sliding connection of baffle 8 has brush board 30, and during the screening, telescopic cylinder 31 drives lift structure intermittent type nature motion to baffle 8 and hits and beat between the mechanism, and during the clearance, moving mechanism 5 drives baffle 8 and removes and telescopic cylinder 31 drives brush board 30 and hugs closely at screen cloth 3 surface removal along the length direction of dustcoat 10 repeatedly, and pulling mechanism drives and hits the structure of beating and rotate repeatedly on clearance brush hair 15.

Moving mechanism 5 includes lead screw 7, moving motor 6 and fixed plate, the inside fixedly connected with of dirt-proof shell 10 the fixed plate, the fixed plate is close to feed inlet 9, and the both ends of lead screw 7 are kept away from the curb plate of feed inlet one side with fixed plate and dirt-proof shell 10 respectively and are rotated and be connected, fixedly connected with moving motor 6 on the curb plate, the output shaft of moving motor 6 and the tip fixed connection of lead screw 7, baffle 8 with lead screw 7 passes through threaded connection, and moving motor 6 drives lead screw 7 and rotates like this, and then can drive baffle 8 and remove along lead screw 7, and the removal of baffle 8 can drive brush board 30 and clean screen cloth 3, gets rid of the remaining powder in screen cloth 3 surface.

Hit the mechanism including hitting piece 13, damping axle 12 and limiting plate 11, pulling mechanism includes two reset coil springs 14, baffle 8 is close to one side symmetry of feed inlet 9 and is equipped with two limiting plates 11, rotates between two limiting plates 11 and is connected with the damping axle, the bottom of damping axle 12 rotates along its length direction and is connected with a plurality of pieces 13 of hitting, the both ends difference fixedly connected with of damping axle 12 return coil springs 14, the tip fixed connection of two reset coil springs 14 be in on the fixed plate of dustcoat 10 bottom. One side of the baffle 8 is rotatably connected with a damping shaft 12 through a limiting plate 11, the damping shaft 12 cannot rotate under the driving of no external force, so that the damping shaft 12 can be ensured to be stable during screening, the beating block 13 cannot move randomly, when the screen box 2 vibrates up and down, the baffle 8 blocks medicinal materials with larger volume or caking, the screen box 2 vibrates up and down, so that the caked medicinal materials can be driven to move towards the beating block 13, the beating block 13 is utilized to beat the caked medicinal materials, the caked medicinal materials can be powdered, the screening effect is enhanced, during subsequent cleaning, the moving mechanism 5 drives the baffle 8 to move, the reset coil spring 14 is stretched and stored energy, the reset coil spring 14 drives the damping shaft 12 and the beating block 13 to rotate, the beating block 13 continuously rubs with cleaning bristles on the front surface while rotating, powder remained on the surface of the beating block 13 is removed, the moving mechanism 5 drives the baffle 8 to return to the initial position, the reset coil spring 14 releases energy to drive the damping shaft 12 and the striking block 13 to rotate reversely, and then the cleaning bristles 15 can be used for cleaning the reverse side of the striking block 13, so that the cleaning effect is better.

Open at the middle part of baffle 8 has a cavity 16, the interior top fixedly connected with of cavity 16 telescopic cylinder 31, open the bottom of baffle 8 has a spacing groove, the spacing inslot is equipped with a brush board 30, brush board 30 towards one side fixedly connected with slide bar 26 of cavity 16 just in slide bar 26's top extends to cavity 16, be equipped with the piece that resets on the slide bar 26, telescopic cylinder 31 is the brush board 30 of extrusion downwards and is made the brush hair on brush board 30 paste the surface at screen cloth 3. The reset piece comprises a reset spring 27 and a reset ring 28, the slide rod 26 is provided with the reset ring 28 and the reset spring 27, and the reset spring 27 is arranged between the reset ring 28 and the inner bottom wall of the cavity 16. When the clearance screen cloth, telescopic cylinder 31 pushes down, make telescopic cylinder 31 can extrude spacing groove with brush board 30, make brush board 30's brush hair can contact the screen cloth, then moving mechanism 5 drives whole baffle 8 and removes, make brush board 30 can be continuous clear up screen cloth 3, it is last to get rid of the remaining medicine in screen cloth 3 surface, at the in-process of screening, telescopic cylinder 31 contactless piece that resets, brush board 30 is under reset spring 27's elasticity influence, brush board 30's brush hair can not contact screen cloth 3, like this at the in-process of screening, the brush hair can not influence the screening of medicinal material, can not block up the medicinal material in feed gap department.

Elevation structure includes L template 21, dead lever 22 and lifter plate 24, a fixed slot 20 has still been opened to one side of cavity 16, the inside fixed link 22 of fixed slot 20, sliding connection has an L template 21 on the dead lever 22, L template 21's horizontal part with be equipped with spring 23 between the bottom of fixed slot 20 just spring 23 cover is established on dead lever 22, be equipped with a limit structure on the L template 21 horizontal part the vertical portion of L template 21 stretches out fixed slot 20 just the bottom fixedly connected with lifter plate 24 of the vertical portion of L template 21, a plurality of pieces 25 of stabbing in the bottom of lifter plate 24, down pressing limit structure when telescopic cylinder 31 descends drives L template 21 whole downstream and makes to stab piece 25 and move to between baffle 8 and the beating piece 13. The limit structure comprises a limit hole 32, a limit hole 32 is formed in the horizontal portion of the L-shaped plate 21, a pressing plate 17 is fixedly connected to the movable end of the telescopic cylinder 31, a pressing block 18 is arranged on one side, close to the fixing groove 20, of the pressing plate 17, an elastic rubber pad 19 is arranged at the edge of the pressing block 18, the pressing block 18 is arranged above the limit hole 32, when the telescopic cylinder 31 drives the pressing plate 17 to press downwards, the pressing block 18 presses the edge of the limit hole 32 above the limit hole 32 and presses the edge of the limit hole 32 through the elastic rubber pad 19, and when the pressing block 18 continuously presses downwards, the pressing block 18 penetrates through the limit hole 32. If hit and beaten the great medicinal material of card volume between piece 13 and the baffle 8, then telescopic cylinder 31 drives clamp plate 17 and pushes down, briquetting 18 presses in spacing hole 32 top and elastic rubber pad 19 presses in the edge of spacing hole 32, can utilize briquetting 18 to push down the horizontal part of L template like this, drive L template and lifter plate downstream, the bottom fixedly connected with of lifter plate has a plurality of pieces of stabbing, make stab piece 25 move to baffle 8 and hit between piece 13, utilize to stab piece 25 and smash the medicinal material of beating the card income between piece 13 and the baffle 8, strengthen the medicinal material screening effect, when stabbing piece 25 and contacting the screen cloth, and telescopic cylinder 31 drives briquetting 18 and pushes down continuously, elastic rubber pad 19 is compressed, make briquetting 18 pass spacing hole 32, L21 does not have pressure this moment, resume its initial position under the drive of spring 23, follow-up telescopic cylinder 31 drives briquetting 18 and presses to reset, the brush plate 30 is extended outward and the screen 3 is cleaned.

The shale shaker subassembly includes sieve case 2, damping spring and vibrating motor 4, sieve case 2 is the slope structure just sieve case 2 with be equipped with damping spring between the frame 1, the inside fixedly connected with screen cloth 3 that also inclines of sieve case 2, the high side position of screen cloth 3 is in the below of feed inlet 9, open the bottom of sieve case 2 has discharge gate 29, the bottom of sieve case 2 is equipped with vibrating motor 4. Sieve case 2 vibrations when vibrating motor 4 drives utilize screen cloth 3 screening medicinal material, and the medicinal material after the screening is discharged from the discharge gate department.

When the invention is used, medicinal materials are poured into the screen box 2 from the feed inlet 9, the vibrating motor 4 drives the screen box 2 to vibrate, the screen 3 is used for screening the medicinal materials, if the caked medicinal materials are blocked by the baffle 8, small-particle medicinal materials roll downwards along the feed gap and are further screened by the screen, one side of the baffle 8 is rotatably connected with the damping shaft 12 through the limiting plate 11, the damping shaft 12 cannot rotate under the drive of no external force, so that the damping shaft 12 can be ensured to be stable during screening, the striking block 13 cannot move randomly, the baffle 8 blocks the medicinal materials with larger volume or caked medicinal materials, the screen box 2 vibrates up and down, so that the caked medicinal materials can be driven to move towards the striking block 13, the striking block 13 is used for striking the caked medicinal materials to enable the caked medicinal materials to be powdered, the screening effect is enhanced, if large-particle medicinal materials are clamped between the striking block 13 and the baffle 8, the telescopic cylinder 31 drives the pressing plate 17 to press downwards, the pressing block 18 is pressed above the limiting hole 32, and the elastic rubber pad 19 is pressed at the edge of the limiting hole 32, so that the pressing block 18 can be utilized to press downwards the horizontal part of the L-shaped plate, the L-shaped plate and the lifting plate are driven to move downwards, the bottom of the lifting plate is fixedly connected with a plurality of poking blocks, the poking blocks 25 are driven to move between the baffle plate 8 and the striking blocks 13, the poking blocks 25 are utilized to poke medicinal materials clamped between the striking blocks 13 and the baffle plate 8, the medicinal material screening effect is enhanced, after screening, when a screen box is cleaned, the telescopic cylinder 31 is pressed downwards, the telescopic cylinder 31 can press the brush plate 30 out of a limiting groove, bristles of the brush plate 30 can contact the screen mesh, then the moving mechanism 5 drives the whole baffle plate 8 to move, the brush plate 30 can continuously clean the screen mesh 3, residual medicinal powder on the surface of the screen plate 3 is removed, while the moving mechanism 5 drives the baffle plate 8 to move, the reset coil spring 14 is stretched to store energy, the reset coil spring 14 drives the damping shaft 12 and the striking block 13 to rotate, the front side of the striking block 13 continuously rubs with cleaning bristles while rotating, residual powder on the surface of the striking block 13 is removed, the moving mechanism 5 drives the baffle plate 8 to return to the initial position, the reset coil spring 14 releases energy, the damping shaft 12 and the striking block 13 are driven to reversely rotate, then the cleaning bristles 15 can be utilized to clean the back side of the striking block 13, and the cleaning effect is better. The invention can clean the screen 3 and the beating block 13, and can break the caked medicinal materials by utilizing the beating block 13 to enhance the screening effect.

The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution of the invention, or to apply the inventive concept and solution directly to other applications without modification.

Claims (7)

1. The utility model provides a medicinal material sieving mechanism which characterized in that: including shale shaker subassembly and clearance subassembly that has screen cloth (3), the shale shaker subassembly is established in frame (1), the top of frame (1) still is equipped with dustproof shell (10) that has feed inlet (9) just dustproof shell (10) cover is at the top of shale shaker subassembly, the clearance subassembly includes moving mechanism, hits the mechanism and clearance mechanism of beating, moving mechanism (5) are established in dustproof shell (10) just the expansion end fixedly connected with of moving mechanism (5) baffle (8), baffle (8) with leave the feeding clearance between screen cloth (3), one side rotation that baffle (8) are close to feed inlet (9) is connected with hits the mechanism and is equipped with pulling mechanism on hitting the mechanism, baffle (8) are close to the one side of hitting the mechanism and are equipped with clearance brush hair (15), one side of baffle (8) is equipped with elevation structure just be equipped with telescopic cylinder (31) on baffle (8), the bottom sliding connection of baffle (8) has brush board (30), and during the screening, telescopic cylinder (31) drive elevation structure intermittent type nature motion to baffle (8) and hit and beat between the mechanism, and during the clearance, moving mechanism (5) drive baffle (8) and remove and telescopic cylinder (31) drive brush board (30) are hugged closely at screen cloth (3) surface removal along the length direction of dustcoat (10) repeatedly, and pulling mechanism drives and hits the structure of beating and rotate repeatedly on clearance brush hair (15).

2. The drug screening device according to claim 1, wherein: hit mechanism including hitting piece (13), damping axle (12) and limiting plate (11), pulling mechanism includes two reset coil springs (14), baffle (8) are close to one side symmetry of feed inlet (9) and are equipped with two limiting plate (11), rotate between two limiting plate (11) and are connected with the damping axle, the bottom of damping axle (12) is followed its length direction and is rotated and is connected with a plurality of pieces (13) of hitting, the both ends of damping axle (12) are fixedly connected with one reset coil spring (14) respectively, and the tip fixed connection of two reset coil springs (14) is in dustproofing shell (10).

3. The drug screening device according to claim 1, wherein: open at the middle part of baffle (8) has a cavity (16), the interior top fixedly connected with of cavity (16) telescopic cylinder (31), open the bottom of baffle (8) has a spacing groove, the spacing inslot is equipped with a brush board (30), brush board (30) just towards one side fixedly connected with slide bar (26) of cavity (16) the top of slide bar (26) extends to in cavity (16), be equipped with the piece that resets on slide bar (26), telescopic cylinder (31) are pushed out brush board (30) downwards and are made the brush hair on brush board (30) paste the surface at screen cloth (3).

4. The drug screening device according to claim 3, wherein: the lifting structure comprises an L-shaped plate (21), a fixed rod (22) and a lifting plate (24), one side of the cavity (16) is also provided with a fixed groove (20), a fixed rod (22) is fixed inside the fixed groove (20), the fixing rod (22) is connected with an L-shaped plate (21) in a sliding way, a spring (23) is arranged between the horizontal part of the L-shaped plate (21) and the bottom of the fixing groove (20), the spring (23) is sleeved on the fixing rod (22), a limiting structure is arranged on the horizontal part of the L-shaped plate (21), the vertical part of the L-shaped plate (21) extends out of the fixing groove (20), the bottom of the vertical part of the L-shaped plate (21) is fixedly connected with a lifting plate (24), the bottom of lifter plate (24) is a plurality of stabs piece (25), pushing down limit structure when telescopic cylinder (31) descend and driving L template (21) whole downstream and make stabs piece (25) move to between baffle (8) and the piece of beating (13).

5. The drug screening device according to claim 4, wherein: limiting structure includes spacing hole (32), it has a spacing hole (32) to open on L template (21) horizontal part, the expansion end fixedly connected with clamp plate (17) of telescopic cylinder (31), one side that clamp plate (17) are close to fixed slot (20) is equipped with a briquetting (18), the edge of briquetting (18) is equipped with an elastic rubber pad (19), establish briquetting (18) the top of spacing hole (32), when telescopic cylinder (31) drive clamp plate (17) and push down, briquetting (18) are pressed and are pressed the edge at spacing hole (32) top and elastic rubber pad (19), and briquetting (18) pass when lasting the push down spacing hole (32).

6. The drug screening device according to claim 3, wherein: the reset piece comprises a reset spring (27) and a reset ring (28), the slide rod (26) is provided with the reset ring (28) and the reset spring (27), and the reset spring (27) is arranged between the reset ring (28) and the inner bottom wall of the cavity (16).

7. The drug screening device according to claim 1, wherein: the shale shaker subassembly includes sieve case (2), damping spring and vibrating motor (4), sieve case (2) are the slope structure just sieve case (2) with be equipped with damping spring between frame (1), the inside fixedly connected with screen cloth (3) that also inclines of sieve case (2), the high side position of screen cloth (3) is in the below of feed inlet (9), open the bottom of sieve case (2) has discharge gate (29), the bottom of sieve case (2) is equipped with vibrating motor (4).

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