CN116197108B - Finished tablet defective product flowing type screening device and screening method - Google Patents

Abstract

The invention relates to a finished tablet defective product flowing type screening device and a screening method, which belong to the technical field of tablet screening. The screening device only realizes screening of finished tablets, conveying of the finished tablets and crushing of the finished tablets through the screening chain, greatly reduces the cost of screening treatment of the finished tablets, and is novel in structure and high in practicability.

Description

Finished tablet defective product flowing type screening device and screening method

Technical Field

The invention belongs to the technical field of tablet screening, and particularly relates to a finished tablet defective product flowing type screening device and a screening method.

Background

Tablets generally refer to tablet-shaped medicines having an arcuate surface and two flat surfaces, and prior to packaging, the tablets require screening of finished defective products, and then transporting the qualified tablets to a designated location for packaging, and the screened defective tablets require crushing. Most of the tablet screening devices in the prior art realize screening of tablets through a screen, and part of the tablet screening devices can realize the conveying function of the tablets even when the tablets are screened, but crushing of the tablets is realized by a separate crusher, the existing tablet screening devices screen defective tablets through the screen and solve the problem of blocking holes of the screen by adding mechanical systems such as pushing rods, and the transportation and crushing of the tablets are realized by other tools and equipment, so that the screening, transportation and crushing of the tablets are realized by adding various mechanical equipment, so that the input cost of enterprises for tablet processing is high.

Disclosure of Invention

The invention provides a mobile screening device and a screening method for defective products of finished tablets, which are used for solving the technical problem of high cost of screening treatment of the existing finished tablets.

The invention is realized by the following technical scheme: a finished tablet defective product flow screening device comprising: support and screening chain, install the grinding table on the support, advance medicine subassembly and drive assembly, the screening chain rotates to be installed on the support, the screening chain is located one side of grinding table, drive assembly is used for the drive the screening chain is in rotate on the support, the screening chain is established ties by a plurality of chain links and forms, the chain link includes both sides board, two screening posts, two grinding rollers and a steering roller, wherein: the two side plates are opposite to each other, the screening columns are rotationally connected between the two side plates, a screening gap is formed between the two screening columns, the distance between the two screening columns is smaller than the diameter of a qualified tablet, the tablet feeding component is used for conveying the tablet to be detected to the screening gap, the grinding roller is rotationally connected between the two side plates, a grinding gap for grinding the residual tablet is formed between the two grinding rollers, the grinding gap is located under the screening gap, the distance between the two grinding rollers is smaller than the distance between the two screening columns, the steering roller is rotationally arranged on one side plate, one end part of each grinding roller is provided with a friction roller, the friction roller is located on the outer side of the two side plates, one friction roller and the steering roller are rotationally connected to the grinding table, the outer wall of the other friction roller is tightly attached to the outer wall of the steering roller, and the driving component drives the grinding roller to rotate so as to drive the grinding roller to rotate on the grinding table.

Optionally, in order to better implement the present invention, the grinding roller includes a mounting shaft rotatably mounted between the two side plates, the friction roller is disposed at an end of the mounting shaft, and a grinding portion mounted in a middle of the mounting shaft and located between the two side plates, and an outer surface of the grinding portion is provided with a plurality of protrusions.

Optionally, in order to better implement the present invention, one end of one screening column is provided with a driving roller, and an outer wall of the driving roller is closely attached to an outer wall of the steering roller.

Optionally, in order to better implement the present invention, the driving assembly includes a driving roller, a first guiding roller, a second guiding roller and a third guiding roller, the driving roller and the first guiding roller are installed at two ends of the bottom of the bracket, the second guiding roller and the third guiding roller are installed above the first guiding roller and the driving roller respectively, a distance between the second guiding roller and the first guiding roller is greater than a distance between the third guiding roller and the driving roller, the driving roller is used for driving the sieving chain to rotate on the first guiding roller, the second guiding roller and the third guiding roller, and the sieving chain between the second guiding roller and the third guiding roller is slidingly overlapped on the grinding table.

Optionally, in order to better implement the present invention, the screening device further comprises a vertical plate, wherein the top surfaces of the two side plates are respectively provided with the vertical plates, and the vertical plates are used for limiting the position of the tablets so as to keep the inclined surfaces of the tablets in contact with the screening column.

Optionally, in order to better realize the invention, the screening device further comprises a light source emitter, a light source receiver, a push rod and a receiving disc, wherein the light source emitter is installed on the support, the light source receiver is installed on the support, the light source emitter and the light source receiver are respectively arranged on two sides of the screening chain, a light passing hole is formed in the middle of the vertical plate, the light source receiver is used for receiving a light signal which is emitted by the light source emitter and passes through the light passing hole, when the size of a tablet is qualified, the light signal emitted by the light source emitter is blocked by the tablet, when the tablet is incomplete, the light signal emitted by the light source emitter passes through the light passing hole and is received by the light source receiver, a mounting plate is installed at the bottom of the support, the push rod is installed on the mounting plate, when the light source receiver receives the light signal, the push rod hits the tablet corresponding to the screening gap, the receiving disc is installed on the support, the receiving disc is arranged close to the third guide roller, and the receiving disc is used for receiving the flying tablet of the push rod.

Optionally, in order to better implement the present invention, the push rod includes a base, a lifting platform, a guide block and a telescopic rod, the base is mounted on the mounting plate, the lifting platform is mounted on the base, the guide block is mounted on the lifting platform, the telescopic rod is mounted on the guide block, the lifting platform is used for adjusting the height of the telescopic rod, the guide block is used for adjusting the telescopic direction of the telescopic rod, so that the telescopic direction of the telescopic rod is perpendicular to the direction in which the sieving chain transmits tablets, and the telescopic rod is used for flying tablets.

Optionally, in order to better implement the present invention, the medicine feeding assembly includes a storage tray, a vibrating block, a guiding curved plate and a guiding sheet, the storage tray is mounted on the support, the storage tray is located above the second guiding roller, the upper surface of the storage tray is inclined towards the direction of the grinding table, the vibrating block is mounted on the bottom wall of the storage tray, one end of the guiding curved plate is connected with the storage tray, one end of the guiding curved plate, which is close to the storage tray, is horizontally arranged with the upper surface of the storage tray, the other end of the guiding curved plate is located above the vertical plate, one end of the guiding curved plate, which is close to the vertical plate, is parallel to the vertical plate, the guiding curved plate is used for conveying medicine which is horizontally arranged in the storage tray to between two adjacent screening columns, the guiding sheet is mounted on the guiding curved plate, one end of the guiding sheet is connected with the side wall of the storage tray, and the other end of the guiding sheet is located above the screening columns.

Optionally, in order to better implement the invention, the screening device further comprises a collecting tank placed on the mounting plate, the collecting tank being located below the second and third guiding rollers, the collecting tank being used for collecting crushed tablets.

Optionally, in order to better implement the invention, the screening method comprises the steps of:

the method comprises the steps that a driving roller rotates clockwise to drive a screening chain to drive on a first guide roller, a second guide roller and a third guide roller, one grinding roller rotates clockwise through a friction roller on a grinding table, the other grinding roller rotates anticlockwise through the transmission of a steering roller, the tops of the two grinding rollers rotate oppositely, and tablets on a storage disc are guided to a screening gap by a guide curved plate under the action of a vibrating block;

step two, after the tablets enter the screening gap, supporting qualified tablets by the screening columns at two sides of the screening gap, and allowing incomplete tablets to pass through the screening gap and fall into the crushing gap;

the tablets at the screening gap are continuously conveyed towards a third guide roller, and in the conveying process, the steering roller drives the screening column to rotate so as to adjust the position of the tablets on the screening column, and when gaps of the tablets contact the screening column, the tablets fall into the grinding gap to be ground and then fall into a collecting tank;

step four, when the tablet passes through the space between the light source receiver and the light source emitter and the tablet size is normal, the tablet shields the light signal emitted by the light source emitter, and when the tablet is incomplete, the tablet sinks at the screening gap under the rotation adjustment action of the screening column, so that the light source receiver receives the light signal emitted by the light source emitter to judge that the tablet is incomplete;

fifthly, a pushing rod flies the incomplete tablets to a receiving tray;

and step six, the tablets fall into the tablet packaging station after passing through the third guide roller.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a finished tablet defective product flowing type screening device which comprises a bracket and a screening chain, wherein a grinding table, a medicine feeding component and a driving component are arranged on the bracket, the screening chain is rotatably arranged on the bracket, the screening chain is positioned on one side of the grinding table, the driving component is used for driving the screening chain to rotate on the bracket, the screening chain is formed by connecting a plurality of chain links in series, and each chain link comprises two side plates, two screening columns, two grinding rollers and a steering roller, wherein the two grinding rollers are arranged on the chain links in sequence, and the screening chain comprises a plurality of chain links which are arranged in sequence, wherein the chain links are arranged on the chain links in sequence, and comprise two grinding rollers and a steering roller.

The two side plates are opposite to each other, the screening columns are rotationally connected between the two side plates, a screening gap is formed between the two screening columns, the distance between the two screening columns is smaller than the diameter of a qualified tablet, the tablet to be detected is conveyed to the screening gap by the tablet feeding assembly, the grinding roller is rotationally connected between the two side plates, a grinding gap for grinding the residual tablet is formed between the two grinding rollers, the grinding gap is located under the screening gap, the distance between the two grinding rollers is smaller than the distance between the two screening columns, the steering roller is rotationally arranged on one side plate, one end part of the two grinding rollers is provided with a friction roller, the friction roller is located on the outer side of the two side plates, one friction roller and the steering roller are in rolling connection with the grinding table, and the outer wall of the other friction roller is tightly attached to the outer wall of the steering roller. Thus, the medicine feeding component is positioned above one end of the screening chain, every two chain links are connected through the screening column, the grinding table is positioned on one side of the upper part of the screening chain, and the two grinding rollers on the chain links roll under the action of the grinding table.

Through the structure, the flow type screening device for the defective products of the finished tablets solves the technical problem of high screening treatment cost of the existing finished tablets. Specifically, advance medicine subassembly and carry the tablet to screening clearance department, the arcwall face butt of tablet is on the screening post of screening clearance both sides, the interval between two adjacent screening posts is less than the diameter of tablet, like this, normal qualified tablet keeps in the top of screening post, the tablet is transported to encapsulation station under the transmission effect of screening chain, when the size of tablet is less than the width between two adjacent screening posts, the tablet falls into crushing clearance department, two crushing rollers roll in opposite directions under the effect of grinding table, in order to squeeze the tablet into crushing clearance, with this tablet of crushing, therefore, this screening device has realized the screening of finished product tablet through the screening chain only, the transmission of finished product tablet and the crushing of finished product tablet, greatly reduced the cost of finished product tablet screening treatment, and a structure is novel, the practicality is strong.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a flow type screening device for defective products of finished tablets according to an embodiment of the present invention;

fig. 2 is another schematic structural view of a flow type screening device for defective products of finished tablets according to an embodiment of the present invention;

FIG. 3 is a schematic view of a link in an embodiment of the invention;

FIG. 4 is a top view of a link in an embodiment of the invention;

FIG. 5 is another schematic structural view of a link in an embodiment of the present invention;

FIG. 6 is a schematic view of a push rod in an embodiment of the present invention;

fig. 7 is a schematic structural view of a medicine feeding member in the embodiment of the present invention.

In the figure: 1-a bracket; 2-screening the chain; 21-side plates; 22-a sieving column; 23-grinding rolls; 24-turning rolls; 3-a drug feeding component; 31-a stock tray; 32-vibrating mass; 33-guiding curved plate; 34-guiding sheets; 4-bulge; 5-friction roller; 61-driving a roller; 62-a first guide roller; 63-a second guide roller; 64-a third guide roller; 7-a vertical plate; 8-a light source emitter; 9-a light source receiver; 10-pushing rod; 101-a base; 102-lifting platform; 103-a guide block; 104-a telescopic rod; 11-receiving trays; 12, a grinding table; 30-a collection tank; 200-light holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.

Examples

The embodiment provides a finished tablet defective product flowing type screening device and screening method, which are used for solving the technical problem of high cost of the existing finished tablet screening treatment. The finished tablet defective product flowing type screening device comprises a bracket 1 and a screening chain 2, wherein:

as shown in fig. 1, a grinding table 12, a medicine feeding assembly 3 and a driving assembly are installed on a bracket 1, a screening chain 2 is rotatably installed on the bracket 1, the screening chain 2 is located on one side of the grinding table 12, the driving assembly is used for driving the screening chain 2 to rotate on the bracket 1, the screening chain 2 is formed by connecting a plurality of links in series, each link comprises two side plates 21, two screening columns 22, two grinding rollers 23 and a steering roller 24, wherein: the two side plates 21 are arranged opposite to each other, the screening columns 22 are rotatably connected between the two side plates 21, a screening gap is formed between the two screening columns 22, the distance between the two screening columns 22 is smaller than the diameter of qualified tablets, the medicine feeding component 3 is used for feeding the tablets to be detected to the screening gap, the grinding rollers 23 are rotatably connected between the two side plates 21, a grinding gap for grinding defective tablets is formed between the two grinding rollers 23, the grinding gap is positioned right below the screening gap, the distance between the two grinding rollers 23 is smaller than the distance between the two screening columns 22, the steering roller 24 is rotatably arranged on one side plate 21, one end parts of the two grinding rollers 23 are provided with a friction roller 5, the friction roller 5 is positioned on the outer side of the two side plates 21, one friction roller 5 and the steering roller 24 are in rolling connection with the grinding table 12, the outer wall of the other friction roller 5 is tightly attached to the outer wall of the steering roller 24, the driving component drives the sieving chain 2 to rotate, so that the friction roller 5 rolls on the grinding table 12 to drive the grinding roller 23 to rotate, wherein two adjacent chain links are connected through the sieving columns 22, specifically, a first mounting hole and a second mounting hole are formed on two sides of one side plate 21 and a second mounting hole on the other side plate 21 are rotatably mounted on one side of the same sieving column 22, and the two side plates 21 are closely arranged, thus, four side plates 21 are rotatably mounted on each sieving column 22, so that the chain links are in a ring-shaped chain, the width of a sieving gap is smaller than the diameter of a qualified tablet, the qualified tablet is kept on two adjacent sieving columns 22 until the tablet is transmitted to a tablet packaging station, a rough surface which is convenient for grinding the tablet and the grinding is arranged on the grinding roller 23, the width of the grinding gap is smaller than the width of the sieving gap, and the incomplete tablets are ground by the grinding roller 23 while passing through the grinding gap.

Through above-mentioned structure, the finished tablet defective products mobile screening device that this embodiment provided has solved current finished tablet screening treatment cost higher technical problem. Specifically, the feeding component 3 conveys the tablets to the screening gap, the arc surfaces of the tablets are abutted on the screening columns 22 on two sides of the screening gap, the distance between two adjacent screening columns 22 is smaller than the diameter of the tablets, thus, the normally qualified tablets are kept above the screening columns 22, the tablets are conveyed to the packaging station under the conveying action of the screening chain 2, when the size of the tablets is smaller than the width between the two adjacent screening columns 22, the tablets fall into the grinding gap, the two grinding rollers 23 roll oppositely under the action of the grinding table 12 to squeeze the tablets into the grinding gap so as to grind the tablets, and the screening device only realizes the screening of finished tablets, the conveying of the finished tablets and the grinding of the finished tablets through the screening chain 2, so that the cost of the screening treatment of the finished tablets is greatly reduced, the structure is novel, and the practicability is strong.

An alternative implementation of this embodiment is as follows: as shown in fig. 4, the grinding roller 23 comprises a mounting shaft and a grinding part, the mounting shaft is rotatably mounted between two side plates 21, the friction roller 5 is arranged at the end part of the mounting shaft, the grinding part is mounted in the middle of the mounting shaft and is positioned between the two side plates 21, a plurality of protrusions 4 are arranged on the outer surface of the grinding part, the grinding part comprises two circular tables and a cylinder, the two circular tables are respectively provided with a large circular surface, an inclined surface and a small circular surface, the small circular surfaces of the two circular tables are respectively attached to the two ends of the cylinder, the large circular surface of one circular table is connected with one side of the mounting shaft, the large circular surface of the other circular table is rotatably mounted on the side plate 21, the side wall of the cylinder is subjected to sand grinding treatment to form a rough surface which is convenient for grinding tablets, the protrusions 4 are mounted on the side wall of the cylinder, and when the tablets fall into a grinding gap, the tablets are guided to the cylinder by the inclined surfaces of the two circular tables and are crushed by the protrusions 4 and the rough surface on the cylinder.

More preferably, as shown in fig. 5, one end of one sieving column 22 is provided with a driving roller, the outer wall of the driving roller is tightly attached to the outer wall of the turning roller 24, when the tablets are at the sieving gap, the incomplete position of the tablets is not necessarily at the sieving column 22, at this time, the incomplete tablets are unfavorable to falling into the grinding gap, the turning roller 24 drives the sieving column 22 to rotate so as to drive the tablets to rotate, and the position of the incomplete part of the tablets on the sieving column 22 is adjusted so that the incomplete tablets fall into the grinding gap to be ground.

An alternative implementation of this embodiment is as follows: the driving assembly comprises a driving roller 61, a first guiding roller 62, a second guiding roller 63 and a third guiding roller 64, wherein the driving roller 61 and the first guiding roller 62 are arranged at two ends of the bottom of the bracket 1, the second guiding roller 63 and the third guiding roller 64 are respectively arranged above the first guiding roller 62 and the driving roller 61, the distance between the second guiding roller 63 and the first guiding roller 62 is larger than the distance between the third guiding roller 64 and the driving roller 61, the driving roller 61 is used for driving the screening chain 2 to rotate on the first guiding roller 62, the second guiding roller 63 and the third guiding roller 64, and the screening chain 2 between the second guiding roller 63 and the third guiding roller 64 is in sliding lap joint on the grinding table 12.

An alternative implementation of this embodiment is as follows: the screening device further comprises a vertical plate 7, as shown in fig. 3, the top surfaces of the two side plates 21 are respectively provided with the vertical plate 7, and the vertical plate 7 is used for limiting the position of the tablets so as to keep the inclined surfaces of the tablets in contact with the screening column 22.

An alternative implementation of this embodiment is as follows: the screening device further comprises a light source emitter 8, a light source receiver 9, a push rod 10, a material receiving disc 11 and a controller, wherein the controller can be an STM32 singlechip, the light source receiver 9 and the push rod 10 are respectively electrically connected with the controller, the light source emitter 8 and the light source receiver 9 are respectively arranged on the bracket 1, the light source emitter 8 and the light source receiver 9 are respectively arranged on two sides of the screening chain 2, the middle part of the vertical plate 7 is provided with a light passing hole 200, two light passing holes 200 on the vertical plate 7 above the two side plates 21 which are opposite to each other are arranged are coaxially arranged, the light source receiver 9 receives light signals which are emitted by the light source emitter 8 and pass through the two light passing holes 200, when a chain is transmitted above a grinding table 12, the side walls of two adjacent vertical plates 7 are abutted together, the light source emitter 8 transmits the light signals to the direction of the light source receiver 9 in real time, when the tablet size is qualified or the light signals are blocked by the vertical plate 7, the light signals are not blocked by the tablet or are detected by the vertical plate 7, the light source receiver 9 is not blocked by the light signals, the controller judges that the tablet size is judged to pass through the two light passing holes 200 when the tablet size is judged to pass through the light receiving holes, and the tablet receiving device is judged to be normal, and the tablet receiving device is judged to be a defect or a tablet on the tablet 2 is judged to be passed through the light receiving hole, and the broken or is judged to be a broken and is judged to be a broken.

An alternative implementation of this embodiment is as follows: as shown in fig. 6, the push rod 10 includes a base 101, a lifting table 102, a guide block 103 and a telescopic rod 104, the base 101 is mounted on a mounting plate, the lifting table 102 is mounted on the base 101, the guide block 103 is mounted on the lifting table 102, the telescopic rod 104 is mounted on the guide block 103, the lifting table 102 is used for adjusting the height of the telescopic rod 104, and the guide block 103 is used for adjusting the telescopic direction of the telescopic rod 104 so as to pass through a crushing gap and a screening gap when the telescopic rod 104 stretches and contracts, thereby striking a broken tablet.

An alternative implementation of this embodiment is as follows: the medicine feeding unit 3 comprises a stock tray 31, a vibrating block 32, a guiding curved plate 33 and a guiding sheet 34, wherein the stock tray 31 is arranged on the bracket 1, the stock tray 31 is positioned above the second guiding roller 63, the upper surface of the stock tray 31 is inclined towards the grinding table 12, the vibrating block 32 is arranged on the bottom wall of the stock tray 31, one end of the guiding curved plate 33 is connected with the stock tray 31, as shown in fig. 7, one end of the guiding curved plate 33, which is close to the stock tray 31, is horizontally arranged with the upper surface of the stock tray 31, the other end of the guiding curved plate 33 is positioned above the vertical plate 7, one end of the guiding curved plate 33, which is close to the vertical plate 7, is parallel to the vertical plate 7, a tablet moves towards the guiding curved plate 33 under the action of the vibrating block 32 in the stock tray 31, one plane of the tablet contacts with the guiding curved plate 33, the arc surface contacts with the guiding sheet 34, and the tablet is guided into a screening gap under the combined action of the guiding sheet 34 and the guiding curved plate 33, wherein the driving roller 61 is driven by a motor, and the motor is arranged on the bracket 1.

An alternative implementation of this embodiment is as follows: the screening device further comprises a collecting tank 30, the collecting tank 30 being placed on the mounting plate, the collecting tank 30 being located below the second guide roller 63 and the third guide roller 64, the collecting tank 30 being intended for collecting crushed tablets.

An alternative implementation of this embodiment is as follows: the flow screening method for the defective products of the finished tablets comprises the following steps:

step one: the driving roller 61 rotates clockwise to drive the screening chain 2 to drive on the first guide roller 62, the second guide roller 63 and the third guide roller 64, one grinding roller 23 rotates clockwise through the rotation of the friction roller 5 on the grinding table 12, the other grinding roller 23 rotates anticlockwise through the transmission of the steering roller 24, the tops of the two grinding rollers 23 rotate oppositely, and the tablets on the storage disc 31 are guided to the screening gap by the guide curved plate 33 under the action of the vibrating block 32;

step two: after the tablets enter the screening gap, the qualified tablets are supported by the screening columns 22 at the two sides of the screening gap, and the incomplete tablets pass through the screening gap and fall to the grinding gap;

step three: the tablets at the screening gap continue to be transported in the direction of the third guide roller 64, and during the transport, the turning roller 24 drives the screening column 22 to rotate so as to adjust the position of the tablets on the screening column 22, and when the gap of the tablets contacts the screening column 22, the tablets fall into the grinding gap to be ground and then fall into the collecting tank 30;

step four: when the tablet passes between the light source receiver 9 and the light source emitter 8 and the tablet is normal in size, the tablet shields the light signal emitted by the light source emitter 8, and when the tablet is incomplete, the tablet sinks at the screening gap under the rotation adjustment effect of the screening column 22, so that the light source receiver 9 receives the light signal emitted by the light source emitter 8 to judge that the tablet is incomplete;

step five: the push rod 10 hits the incomplete tablets to the receiving tray 11;

step six: the tablets drop into the tablet-packaging station after passing the third guide roller 64.

The above description is merely an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present invention, and it is intended to cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (5)

1. A finished tablet defective product flow type screening device, characterized by comprising:

the grinding table, the medicine feeding component and the driving component are arranged on the bracket;

the screening chain is rotatably arranged on the bracket, the screening chain is positioned on one side of the grinding table, the driving component is used for driving the screening chain to rotate on the bracket, and the screening chain is formed by connecting a plurality of chain links in series;

the chain link includes both sides board, two screening posts, two crushing rollers and a steering roller, wherein:

the two side plates are arranged opposite to each other;

the screening columns are rotationally connected between the two side plates, a screening gap is formed between the two screening columns, the distance between the two screening columns is smaller than the diameter of the qualified tablet, and the tablet feeding assembly is used for conveying the tablet to be detected to the screening gap;

the grinding rollers are rotatably connected between the two side plates, a grinding gap for grinding the residual tablets is formed between the two grinding rollers, the grinding gap is positioned right below the sieving gap, and the distance between the two grinding rollers is smaller than the distance between the two sieving columns;

the turning rollers are rotatably arranged on one side plate, one end part of each of the two grinding rollers is provided with a friction roller, each friction roller is positioned on the outer sides of the two side plates, one friction roller and each turning roller are in rolling connection with the grinding table, and the outer wall of the other friction roller is tightly attached to the outer wall of the turning roller;

the grinding roller comprises a mounting shaft and a grinding part, the mounting shaft is rotatably mounted between the two side plates, the friction roller is arranged at the end part of the mounting shaft, the grinding part is mounted in the middle of the mounting shaft and is positioned between the two side plates, and a plurality of protrusions are arranged on the outer surface of the grinding part;

one end part of one screening column is provided with a driving roller, and the outer wall of the driving roller is tightly attached to the outer wall of the steering roller;

the driving assembly comprises a driving roller, a first guide roller, a second guide roller and a third guide roller, wherein the driving roller and the first guide roller are arranged at two ends of the bottom of the bracket, and the second guide roller and the third guide roller

The third guide roller is respectively arranged above the first guide roller and the driving roller, the distance between the second guide roller and the first guide roller is larger than the distance between the third guide roller and the driving roller, the driving roller is used for driving the screening chain to rotate on the first guide roller, the second guide roller and the third guide roller, and the screening chain between the second guide roller and the third guide roller is in sliding lap joint on the grinding table;

the top surfaces of the two side plates are respectively provided with a vertical plate, and the vertical plates are used for limiting the position of the tablets;

a light source emitter mounted on the bracket;

the light source receiver is arranged on the bracket, the light source emitter and the light source receiver are respectively arranged on two sides of the screening chain, a light passing hole is formed in the middle of the vertical plate, the light source receiver is used for receiving light signals which pass through the light passing hole after being sent out by the light source emitter, when the size of a tablet is qualified, the light signals sent out by the light source emitter are shielded by the tablet, and when the tablet is incomplete, the light signals sent out by the light source emitter pass through the light passing hole and are received by the light source receiver;

the mounting plate is mounted at the bottom of the bracket, the push rod is mounted on the mounting plate, and when the light source receiver receives a light signal, the push rod flies the tablets corresponding to the screening gap;

the receiving tray is arranged on the bracket, is close to the third guide roller and is used for receiving tablets hit by the push rod.

2. A finished tablet defective product flow screening device according to claim 1, wherein the pusher comprises:

a base mounted on the mounting plate;

a lifting table mounted on the base;

the guide block is arranged on the lifting platform;

the telescopic link is installed on the guide block, the elevating platform is used for adjusting the height of telescopic link, the guide block is used for adjusting the flexible orientation of telescopic link, the telescopic link is used for beating the flight tablet.

3. A finished tablet defective product flow screening device according to claim 2, wherein said feed assembly comprises:

the storage disc is arranged on the bracket, is positioned above the second guide roller, and the upper surface of the storage disc is inclined towards the direction of the grinding table;

the vibrating block is arranged on the bottom wall of the storage tray;

one end of the guide curved plate is connected with the storage tray, one end of the guide curved plate, which is close to the storage tray, is horizontally arranged with the upper surface of the storage tray, the other end of the guide curved plate is positioned above the vertical plate, one end of the guide curved plate, which is close to the vertical plate, is parallel to the vertical plate, and the guide curved plate is used for conveying the medicine horizontally arranged in the storage tray between two adjacent screening columns;

the guide piece is arranged on the guide curved plate, one end of the guide piece is connected with the side wall of the storage tray, and the other end of the guide piece is positioned above the screening column.

4. A finished tablet defective product flow screening device according to claim 3, further comprising:

and the collecting groove is arranged on the mounting plate and is positioned below the second guide roller and the third guide roller, and the collecting groove is used for collecting crushed tablets.

5. A method of screening by a finished tablet defective product flow screening apparatus according to claim 4, comprising the steps of:

the method comprises the steps that a driving roller rotates clockwise to drive a screening chain to drive on a first guide roller, a second guide roller and a third guide roller, one grinding roller rotates clockwise through a friction roller on a grinding table, the other grinding roller rotates anticlockwise through the transmission of a steering roller, the tops of the two grinding rollers rotate oppositely, and tablets on a storage disc are guided to a screening gap by a guide curved plate under the action of a vibrating block;

step two, after the tablets enter the screening gap, supporting qualified tablets by the screening columns at two sides of the screening gap, and allowing incomplete tablets to pass through the screening gap and fall into the crushing gap;

the tablets at the screening gap are continuously conveyed towards the direction of a third guide roller, and in the conveying process, the steering roller drives the screening column to rotate so as to adjust the position of the tablets on the screening column, and when gaps of the tablets contact the screening column, the tablets fall into the grinding gap to be ground and then fall into the collecting groove;

step four, when the tablet passes through the space between the light source receiver and the light source emitter and the tablet size is normal, the tablet shields the light signal emitted by the light source emitter, and when the tablet is incomplete, the tablet sinks at the screening gap under the rotation adjustment action of the screening column, so that the light source receiver receives the light signal emitted by the light source emitter to judge that the tablet is incomplete;

fifthly, a pushing rod flies the incomplete tablets to a receiving tray;

and step six, the tablets fall into the tablet packaging station after passing through the third guide roller.