Medicine raw material screening and extracting device

Abstract

The invention relates to the technical field of medicine raw material screening, in particular to a medicine raw material screening and extracting device which comprises a feeding mechanism for controlling medicine raw materials to enter, a distributing mechanism for screening the medicine raw materials and a discharging port for discharging the screened medicine raw materials. When a transmission shaft rotates, a connecting rod and a piston plate are driven to slide in an air cylinder through a hinge rod, the air cylinder can limit sliding of the piston plate, when the piston plate moves, a pull rope is released, a second spring is reset to drive a push rod to move upwards and abut against a screening plate, and the screening plate is stressed to rotate; at the moment, medicine raw materials which are not screened out on the screening plate move on the screening plate and move towards the material conveying pipe, meanwhile, when a piston plate slides, air in an air cylinder is pushed to be blown to the screening plate through a through hole and a hollow arrangement of a push rod, and if the screening plate is blocked at the moment, the air can blow the medicine raw materials in the screening plate, and then the screening plate is dredged.

Description

Technical Field

[0001] The invention relates to the technical field of drug raw material screening, and in particular to a drug raw material screening and extraction device. Background Art

[0002] As the foundation of the pharmaceutical industry, the quality and characteristics of drug raw materials are directly related to the efficacy and safety of the final drug. Drug raw materials usually include active ingredients, excipients and various additives, which exist in the form of powder, granules, crystals or liquids. In the production process of drug preparations, the particle size distribution of raw materials is a crucial parameter, which affects the dissolution rate, bioavailability, stability of the drug, as well as the uniformity and fluidity of the preparation.

[0003] To ensure that the drug raw materials meet the production requirements, drug raw material screening technology came into being. Screening is a process of grading raw materials according to particle size by physical methods, using the difference in the permeability of particles of different sizes on the screen. In the pharmaceutical field, screening is not only used for the pretreatment of raw materials, but also throughout the entire production process, such as mixing, tableting, granulation, capsule filling, etc., to ensure the consistency and quality of the product.

[0004] The invention with application number CN202410035163.7 discloses a mixed screening machine for treating granular drugs for neonatal jaundice, which relates to the field of screening machines. The device includes a mixed screening machine body and a support frame for supporting the mixed screening machine body, a vibration motor is arranged at the lower part of the mixed screening machine body, a plurality of groups of vibration springs are arranged between the support frame and the mixed screening machine body, and a sieve plate is arranged inside the mixed screening machine body. The mixed screening machine for treating granular drugs for neonatal jaundice, by arranging a plurality of groups of partition inclined plates inside the feeding box, extends the unloading path inside the feeding box, and then combines with a plurality of groups of scrapers arranged therein to assist in moving the drugs accumulated on the partition inclined plates to the drug outlet, so that a large number of granular drugs will not be directly loaded into the inside of the mixed vibration screening machine body, and the small amount and multiple loading method effectively improves the screening efficiency of the mixed vibration screening machine body.

[0005] However, after the screen plate in this patent is blocked, the particles blocked in the screen plate mesh cannot be removed.

[0006] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0007] The object of the present invention is to provide a drug raw material screening and extraction device which can effectively solve the above technical problems.

[0008] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0009] A drug raw material screening and extraction device, comprising: a feeding mechanism for controlling the entry of drug raw materials, a material separation mechanism for screening the drug raw materials, and a material outlet for discharging the drug raw materials after screening;

[0010] The feeding mechanism comprises: a lower material bin, a feeding hopper fixedly connected to the lower material bin, and a transmission shaft passing through the lower material bin and the feeding hopper;

[0011] The material distribution mechanism comprises: a screening bin, a plurality of screening bins are staggered with the transmission shaft as the center line, the plurality of screening bins are connected by a material delivery pipe, and an extraction pipe is fixedly connected to the screening frame;

[0012] The screening bin is rotatably connected with a screening plate, a lifting rod for driving the screening plate to rotate, and an air cylinder for driving the lifting rod to move;

[0013] The air cylinder is slidably connected to a piston plate, the piston plate is fixedly connected to a pull rope, one end of the pull rope is fixedly connected to a push rod, the piston plate is fixedly connected to a connecting rod, the connecting rod is rotatably connected to a hinged rod, and the hinged rod is fixedly installed on the transmission shaft; the push rod is hollow.

[0014] Furthermore, the lifting rod is fixedly mounted on the gas cylinder, and a through hole is provided at the connection position between the lifting rod and the gas cylinder.

[0015] Furthermore, a screening frame and a dispersion frame are fixedly connected to the lower material bin; the screening frame and the dispersion frame are both fixedly mounted on the axis of the transmission shaft;

[0016] The screening frame and the dispersion frame are hollow cone-shaped, and the screening frame and the dispersion frame are arranged opposite to each other.

[0017] Furthermore, a lower barrel is fixedly mounted on the feed hopper;

[0018] A feed plate is fixedly mounted on the lower barrel, a baffle plate is rotatably mounted on the lower barrel, and the baffle plate is fixedly mounted on the transmission shaft.

[0019] Furthermore, the feed plate and the baffle plate are symmetrically arranged in two groups along the center line of the lower barrel, and a pre-feeding cavity is provided between the two groups of the baffle plates.

[0020] Furthermore, a push plate is fixedly connected to the transmission shaft, and the push plate cooperates with the screening frame.

[0021] Furthermore, a seal is slidably connected to the screening plate, a spring 1 is fixedly mounted on the seal, a vertical plate is fixedly mounted on the spring 1, and the vertical plate is fixedly mounted on the screening plate.

[0022] Furthermore, a second spring is fixedly mounted on the lifting rod, and the second spring is fixedly mounted on the push rod.

[0023] Furthermore, a sieve plate is fixedly connected to the inner wall of the extraction tube, and a distribution pipe is connected to the extraction tube; the sieve plate and the distribution pipe correspond in position.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides a drug raw material screening and extraction device. When the transmission shaft rotates, the connecting rod and the piston plate are driven to slide inside the air cylinder through the hinged rod. The air cylinder can limit the sliding of the piston plate. When the piston plate moves, the pull rope is released, and the spring is reset to drive the push rod to move up and abut against the screening plate. The screening plate is rotated under force. At this time, the drug raw materials that have not been screened on the screening plate move on the screening plate and move toward the feed pipe. At the same time, when the piston plate slides, it pushes the gas inside the air cylinder to blow onto the screening plate through the through hole and the hollow setting of the push rod. At this time, if the screening plate is blocked, the gas will blow the drug raw materials in the screening plate, thereby unblocking the screening plate. That is to say, when the transmission shaft rotates, on the one hand, it can drive the piston plate to move and push the screening plate to rotate and tilt, and on the other hand, it can unblock the screening plate to avoid blockage of the screening plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] Figure 1 It is a schematic diagram of a drug raw material screening and extraction device of the present invention;

[0028] Figure 2 This is a schematic diagram of a screening bin of a drug raw material screening and extraction device of the present invention;

[0029] Figure 3 A schematic diagram of a feed hopper of a drug raw material screening and extraction device of the present invention;

[0030] Figure 4 This is a schematic diagram of a lower barrel of a drug raw material screening and extraction device of the present invention;

[0031] Figure 5 A schematic diagram of a gas cylinder of a drug raw material screening and extraction device of the present invention;

[0032] Figure 6 A schematic diagram of a screening plate of a drug raw material screening and extraction device of the present invention;

[0033] Figure 7 A schematic diagram of a lifting rod of a drug raw material screening and extraction device of the present invention;

[0034] Figure 8 A drug raw material screening and extraction device of the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0035] Fig. 9 A schematic diagram of an extraction tube of a drug raw material screening and extraction device of the present invention;

[0036] Fig.10 The figure is a schematic diagram of a screening plate of a drug raw material screening and extraction device of the present invention.

[0037] In the figure: 1. feeding mechanism; 11. feeding bin; 111. screening frame; 112. dispersion frame; 12. feeding hopper; 121. feeding barrel; 1211. feeding plate; 1212. baffle plate; 13. transmission shaft; 131. pushing plate; 2. material distribution mechanism; 21. screening bin; 211. screening plate; 2111. sealing element; 2112. vertical plate; 2113. spring 1; 212. lifting rod; 2121. spring 2; 2122. pushing rod; 213. air cylinder; 2131. piston plate; 2132. pull rope; 2133. connecting rod; 2134. hinged rod; 22. feeding pipe; 23. extraction pipe; 231. screening plate; 232. material distribution pipe; 3. discharge port. DETAILED DESCRIPTION

[0038] In order to make the purpose, 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. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0039] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0040] like Figures 1 to 10As shown, a drug raw material screening and extraction device of the present invention comprises: a machine body, a feeding mechanism 1 for controlling the entry of drug raw materials, a dividing mechanism 2 for screening the drug raw materials, and a discharge port 3 for discharging the drug raw materials after screening; the feeding mechanism 1 is arranged at the top of the machine body, the dividing mechanism 2 is arranged in the machine body, and the discharge port 3 cooperates with the dividing mechanism 2 and passes through the machine body.

[0041] The drug raw material enters the feeding mechanism 1 for multiple small amounts of feeding, is filtered by the dividing mechanism 2, and is finally discharged through the discharge port 3, completing the screening and extraction of the drug raw material.

[0042] The feeding mechanism 1 includes: a lower bin 11, a feeding hopper 12 fixedly connected to the lower bin 11, and a transmission shaft 13 that passes through the lower bin 11 and the feeding hopper 12 from the axial position; one end of the transmission shaft 13 is fixedly connected to the motor, and the lower bin 11 is fixedly installed on the machine body. The drug raw materials enter the feed hopper 12 and are gradually discharged in small quantities and multiple times into the lower bin 11. The lower bin 11 performs preliminary filtration on the drug raw materials and discharges them to the dividing mechanism 2.

[0043] The feed hopper 12 is trumpet-shaped, and a lower barrel 121 is fixedly mounted on the feed hopper 12 ; a feed plate 1211 is fixedly mounted on the lower barrel 121 , a baffle plate 1212 is rotatably mounted on the lower barrel 121 , and the baffle plate 1212 is fixedly mounted on the transmission shaft 13 .

[0044] The baffle plate 1212 and the feed plate 1211 are provided with multiple groups of discharge holes in an offset manner. When the baffle plate 1212 is driven by the transmission shaft 13 to rotate, the discharge holes on the baffle plate 1212 and the feed plate 1211 gradually overlap. At this time, the drug raw materials inside the feed hopper 12 fall downward through the overlapping discharge holes. As the discharge holes on the baffle plate 1212 and the feed plate 1211 separate after overlapping, the baffle plate 1212 and the feed plate 1211 block the drug raw materials again, so that the drug raw materials in the discharge hopper stop falling downward, thereby realizing the discharge control of the drug raw materials.

[0045] As a further extension of the present application, the feed plate 1211 and the baffle plate 1212 are symmetrically arranged in two groups along the center line of the lower barrel 121, and a pre-feeding cavity is arranged between the two groups of baffle plates 1212. The transmission shaft 13 drives the two groups of baffle plates 1212 to rotate, and the positions of the feeding holes on the two groups of baffle plates 1212 are also staggered. The upper baffle plate 1212 and the lower baffle plate 1212 are used for illustration. The transmission shaft 13 drives the upper baffle plate 1212 to rotate so that the drug raw material falls downward. At this time, the lower baffle plate 12 12 is staggered with the discharge hole on the lower feed plate 1211 to block the drug raw materials and allow them to enter the pre-discharge chamber. Then the upper and lower baffle plates 1212 continue to rotate to make the lower baffle plate 1212 coincide with the discharge hole on the lower feed plate 1211 to discharge the drug raw materials in the pre-discharge chamber. In other words, the drug raw materials in the discharge hopper are not discharged directly, but are first discharged into the pre-discharge chamber and then discharged, which can better control the discharge speed and amount of the drug raw materials, avoid the drug raw materials from rushing in all at once, and reduce the screening effect.

[0046] The lower silo 11 is fixedly connected with a screening frame 111 and a dispersion frame 112; the screening frame 111 and the dispersion frame 112 are fixedly mounted on the axis of the transmission shaft 13; the screening frame 111 and the dispersion frame 112 are hollow cone-shaped, and the screening frame 111 and the dispersion frame 112 are arranged opposite to each other, and a screening hole is provided on the screening frame 111, and the drug raw materials fall on the dispersion frame 112, and the drug raw materials are diffused outward through the arc surface on the dispersion frame 112 and fall on the arc surface on the screening frame 111, and then gather in the screening frame 111, and in this process, the drug raw material particles can be filtered, the dispersion of the drug particles is improved, and the screening effect is improved. It should be noted that in order to better collect the drug raw materials that fall on the dispersion frame 112, the diameter of the adjacent surface of the screening frame 111 on the two adjacent surfaces of the dispersion frame 112 and the dispersion frame 112, needs to be larger than the adjacent surface of the dispersion frame 112.

[0047] In addition, a push plate 131 is fixedly connected to the transmission shaft 13, and the push plate 131 cooperates with the screening frame 111. When the drug raw materials fall into the screening frame 111, the part of the drug raw materials that are not completely screened will fall to the bottom of the screening frame 111 and cannot be filtered. At this time, the transmission shaft 13 drives the push plate 131 to rotate, which can drive the drug raw materials to move, and the drug raw materials are screened through the screening frame 111 to avoid accumulation inside the screening frame 111.

[0048] That is to say, when the transmission shaft 13 rotates, on the one hand, it can drive the baffle plate 1212 to rotate, so that the drug raw materials in the discharge bin 11 can be discharged, and on the other hand, it can drive the push plate 131 to rotate to prevent the drug raw materials from accumulating inside the screening frame 111 and affecting the screening effect of the screening frame 111 on the drug raw materials.

[0049] After being screened by the screening frame 111, the drug raw materials fall into the dividing mechanism 2 for secondary screening. The dividing mechanism 2 includes: a screening bin 21, and multiple groups of screening bins 21 are staggered with the transmission shaft 13 as the center line. The multiple groups of screening bins 21 are connected by a feed pipe 22. An extraction pipe 23 is fixedly connected to the screening frame 111, and a screening plate 211 is rotatably connected to the screening bin 21; the screening bin 21 is fixedly installed on the body and vertically arranged below the screening frame 111. After being screened by the screening frame 111, the drug raw materials fall into the screening bin 21 for secondary screening, thereby further improving the screening effect of the drug raw materials.

[0050] Please refer to the attached drawings in the instruction manual Figure 2 The setting of the middle screening bin 21 is for ease of understanding Figure 2 The four screening bins 21 in the middle are represented by the upper left screening bin 21, the lower left screening bin 21, the upper right screening bin 21, and the lower right screening bin 21 respectively. The drug raw materials are filtered by the screening frame 111 and fall into the upper left screening bin 21 and the upper right screening bin 21. The upper left screening bin 21 is connected with the upper right screening bin 21 through the material distribution pipe 232. The mesh number of the screening plate 211 in the upper left screening bin 21 is smaller than the mesh number of the screening plate 211 in the upper right screening bin 21, and the mesh number of the screening plate 211 in the lower left screening bin 21 is larger than the mesh number of the screening plate 211 in the upper right screening bin 21. 11 mesh, the mesh number of the screening plate 211 in the lower right screening bin 21 is greater than the mesh number of the screening plate 211 in the lower left screening bin 21, the drug raw materials screened in the upper left screening bin 21 will be transported to the upper right screening bin 21 for secondary screening, to avoid accidents such as irregular surface of the drug raw materials causing them to not be screened, thereby improving the screening accuracy, and the drug raw materials screened in the lower left screening bin 21 will be transported to the lower right screening bin for secondary screening, and the drugs screened in the upper right screening bin 21 will originally be transported to the lower left screening bin 21, thereby greatly improving the screening accuracy.

[0051] Since the mesh number of the screening plate 211 in the upper left screening bin 21 is different from that in the upper right screening bin 21, and the drug raw materials screened by the screening frame 111 will fall into the upper left and upper right screening bins 21, the diameter of the screening holes on the screening frame 111 near the upper left screening bin 21 is different from that near the upper right screening bin 21, so that the drug raw materials can directly enter the appropriate screening bin 21 according to their size after screening, thereby improving the screening efficiency.

[0052] The push plate 131 can push the accumulated drug raw materials for screening on one hand, and can push the drug raw materials of inappropriate size to move to the other side for screening and unloading on the other hand.

[0053] Specifically, the screening frame 111 performs preliminary screening on the drug raw materials and then discharges them into the upper left and upper right screening bins 21. After screening in the upper left and upper right screening bins 21, the drug raw materials with appropriate sizes are screened in the lower left and lower right screening bins 21 respectively, while the drug raw materials with large sizes are transported to the other group of screening bins 21 through the feed pipes 22. After screening in the upper right screening bin 21, the particles with oversized sizes are transported to the lower left screening bin 21 through the extraction pipe 23, thereby achieving high screening accuracy and high screening efficiency for the drug raw materials.

[0054] After being screened in the upper left screening bin 21, it is transported to the upper right screening bin 21 through the feed pipe 22 for screening. There is still a high probability that it cannot be screened out. Then, after being transported to the lower left screening bin 21 through the extraction pipe 23, the probability of being screened out after being screened in the lower right screening bin 21 is reduced again. Therefore, an extraction pipe 23 is installed on the upper right screening bin 21, and a screening plate 231 is fixedly connected to the inner wall of the extraction pipe 23, and a distribution pipe 232 is connected to the extraction pipe 23; the screening plate 231 and the distribution pipe 232 correspond in position. When the drug raw materials screened in the upper right screening bin 21 are discharged through the extraction pipe 23, due to the misaligned setting of the screening bin 21, the feed pipe 22 and the extraction pipe 23 are also tilted. When the drug raw materials enter the interior of the extraction pipe 23, they are blocked by the screening plate 231, and the drug raw materials of suitable size can continue to be transported, while the unsuitable drug raw materials are affected by the screening plate 231 and move to the distribution pipe 232 and are discharged through the distribution pipe 232. Please refer to the attached drawings of the specification Fig.10 There are two groups of screening plates 231 , and the adjacent surfaces of the two groups of screening plates 231 are inclined, which can guide the materials toward the distribution pipe 232 .

[0055] A lifting rod 212 that pushes the screening plate 211 to rotate, and an air cylinder 213 that drives the lifting rod 212 to move; a piston plate 2131 is slidably connected to the air cylinder 213, a pull rope 2132 is fixedly connected to the piston plate 2131, one end of the pull rope 2132 is fixedly connected to a push rod 2122, a connecting rod 2133 is fixedly connected to the piston plate 2131, a hinged rod 2134 is rotatably connected to the connecting rod 2133, and the hinged rod 2134 is fixedly installed on the transmission shaft 13; the push rod 2122 is hollow, the lifting rod 212 is fixedly installed on the air cylinder 213, a through hole is provided at the connection position between the lifting rod 212 and the air cylinder 213, a spring 2121 is fixedly installed on the lifting rod 212, and the spring 2121 is fixedly installed on the push rod 2122; a through hole is provided on the side wall of the screening bin 21; the push rod 2122 is rotatably connected to the screening plate 211.

[0056] When the transmission shaft 13 rotates, the connecting rod 2133 and the piston plate 2131 are driven to slide inside the air cylinder 213 through the hinge rod 2134. The air cylinder 213 can limit the sliding of the piston plate 2131. When the piston plate 2131 moves, the pull rope 2132 is released, and the spring 2121 is reset to drive the push rod 2122 to move up and abut against the screening plate 211. The screening plate 211 is rotated under force. At this time, the drug raw materials that have not been screened on the screening plate 211 move on the screening plate 211, move toward the feeding pipe 22, and enter the feeding pipe 22 through the through hole. At the same time, when the piston plate 2131 slides, it pushes the gas inside the gas cylinder 213 to be blown onto the screening plate 211 through the through hole and the hollow setting of the push rod 2122. At this time, if the screening plate 211 is blocked, the gas will blow the medicinal raw materials in the screening plate 211, thereby clearing the screening plate 211. That is to say, when the transmission shaft 13 rotates, on the one hand, it can drive the piston plate 2131 to move and push the screening plate 211 to rotate and tilt, and on the other hand, it can clear the screening plate 211 to avoid blockage of the screening plate 211.

[0057] The sieve plate 211 rotates under the push of the push rod 2122, so that the drug raw materials on the sieve plate 211 are discharged through the feed pipe 22 or the extraction pipe 23. At the same time, the push rod 2122 blows air toward the sieve plate 211 to blow out the drug raw materials blocking the sieve plate 211. By performing secondary screening on the drug raw materials that have not been screened, not only the screening accuracy can be improved, but also the normal use of the sieve plate 211 can be guaranteed to avoid affecting the screening of the drug raw materials.

[0058] The transmission shaft 13 rotates to drive the piston plate 2131 to move, clear the screening plate 211 and lift up the screening plate 211 for unloading. On the one hand, it drives the baffle plate 1212 to rotate, so that the drug raw materials in the unloading bin 11 enter the pre-unloading cavity, and unload small amounts and multiple times to ensure the screening effect. On the other hand, it can drive the push plate 131 to move and rotate, pushing the drug raw materials dispersed by the dispersion frame 112 into the screening frame 111 for accumulation, and screening is performed during rotation to prevent the drug raw materials from continuously accumulating inside the screening frame 111.

[0059] A part of the sieved drug raw materials is discharged through the extraction tube 23, and the other part is discharged through the sieving bin 21, which can accurately complete the sieving of the drug raw materials and discharge them by category, and has a good use effect.

[0060] A seal 2111 is slidably connected to the screening plate 211, a spring 2113 is fixedly installed on the seal 2111, a vertical plate 2112 is fixedly installed on the spring 2113, and the vertical plate 2112 is fixedly installed on the screening plate 211. When the screening plate 211 rotates, a gap will appear between the screening plate 211 and the inner wall of the screening bin 21. At this time, the spring 2113 is reset to drive the seal 2111 to move, thereby ensuring the screening effect of the drug raw materials and avoiding incomplete screening.

[0061] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0062] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A drug raw material screening and extraction device, characterized in that: include: A feeding mechanism for controlling the entry of drug raw materials, a material separation mechanism for screening the drug raw materials, and a discharge port for discharging the drug raw materials after screening; The feeding mechanism comprises: a lower material bin, a feeding hopper fixedly connected to the lower material bin, and a transmission shaft passing through the lower material bin and the feeding hopper; The material distribution mechanism comprises: a screening bin, a plurality of screening bins are staggered with the transmission shaft as the center line, the plurality of screening bins are connected by a material delivery pipe, and an extraction pipe is fixedly connected to the screening frame; The screening bin is rotatably connected with a screening plate, a lifting rod for driving the screening plate to rotate, and an air cylinder for driving the lifting rod to move; The air cylinder is slidably connected to a piston plate, the piston plate is fixedly connected to a pull rope, one end of the pull rope is fixedly connected to a push rod, the piston plate is fixedly connected to a connecting rod, the connecting rod is rotatably connected to a hinged rod, and the hinged rod is fixedly installed on the transmission shaft; the push rod is hollow.

2. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: The lifting rod is fixedly mounted on the gas cylinder, and a through hole is provided at the connection position between the lifting rod and the gas cylinder.

3. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: The lower material bin is fixedly connected with a screening frame and a dispersion frame; the screening frame and the dispersion frame are both fixedly mounted on the axis of the transmission shaft; The screening frame and the dispersion frame are hollow cone-shaped, and the screening frame and the dispersion frame are arranged opposite to each other.

4. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: A lower barrel is fixedly mounted on the feed hopper; A feed plate is fixedly mounted on the lower barrel, a baffle plate is rotatably mounted on the lower barrel, and the baffle plate is fixedly mounted on the transmission shaft.

5. A drug raw material screening and extraction device as claimed in claim 4, characterized in that: The feed plates and the baffle plates are symmetrically arranged in two groups along the center line of the lower barrel, and a pre-feeding cavity is arranged between the two groups of baffle plates.

6. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: A pushing plate is fixedly connected to the transmission shaft, and the pushing plate cooperates with the screening frame.

7. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: A sealing member is slidably connected to the screening plate, a spring 1 is fixedly mounted on the sealing member, a vertical plate is fixedly mounted on the spring 1, and the vertical plate is fixedly mounted on the screening plate.

8. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: A second spring is fixedly mounted on the lifting rod, and the second spring is fixedly mounted on the push rod.

9. A drug raw material screening and extraction device as claimed in claim 1, characterized in that: A sieve plate is fixedly connected to the inner wall of the extraction tube, and a material distribution pipe is connected to the extraction tube; the sieve plate corresponds to the position of the material distribution pipe.

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