A pharmaceutical intermediate screening drying device

Abstract

This invention relates to the field of pharmaceutical intermediate processing technology, specifically to a pharmaceutical intermediate screening and drying device. The device includes a base platform, a screening and draining integrated mechanism mounted on the left side of the upper surface of the base platform, a segmented drying mechanism mounted on the right side of the upper surface of the base platform, and a transfer mechanism for connecting the screening and draining integrated mechanism and the segmented drying mechanism mounted in the middle of the upper surface of the base platform. The segmented drying mechanism includes a drying box fixedly connected to the upper part of the base platform, several rotating rings circumferentially and equidistantly connected to the outer side of a mounting ring, baffles fixedly connected to the outer side of the rotating rings, and elastic sheets fixedly connected between adjacent baffles. A counterweight is fixedly connected to the outer side of the rotating rings via a lever. This invention, through the combination of a conical cylinder, mounting ring, rotating rings, and baffles, evenly spreads and divides the pharmaceutical intermediates into multiple parts, ensuring more thorough drying of the pharmaceutical intermediates and improving the preparation quality of the pharmaceutical intermediates.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical intermediate processing technology, specifically to a pharmaceutical intermediate screening and drying device. Background Technology

[0002] Pharmaceutical intermediates are chemical substances used as precursors or intermediate products in the drug synthesis process to prepare the final drug. They are usually organic compounds with certain chemical and biological activities, but they do not yet possess the specific properties and functions to become the final drug. Pharmaceutical intermediates can be further processed and optimized through synthesis and chemical transformation to produce drugs with the desired pharmacological activities and effects. Pharmaceutical intermediates play a key role in drug research and development and production. Some pharmaceutical intermediates separate compounds with lower purity by forming crystals. These crystal particles need to be sieved and dried. Sieving can remove unwanted crystals or solid residues and obtain the desired particle size distribution, while drying helps to remove excess solvent or water from the crystals.

[0003] The traditional method of drying crystalline particles involves spreading them on a conveyor belt and sending them into a drying oven. However, this method can result in some areas having a thicker layer of crystalline particles, which means that the deeper crystalline particles cannot be thoroughly heated. This leads to incomplete drying of some crystals and affects the quality of pharmaceutical intermediates.

[0004] In addition, the traditional method for draining water trapped in crystalline particles is simply to put the crystals on a filter screen and use gravity to separate the water. However, this method is not thorough in draining water. Pharmaceutical intermediates are prone to compaction, which causes water to accumulate inside the pharmaceutical intermediates, resulting in increased drying time and affecting the drying quality. Summary of the Invention

[0005] This invention provides a pharmaceutical intermediate screening and drying device, which solves the technical problems of uneven spreading of pharmaceutical intermediates during drying, resulting in some areas being too thick to be completely dried, thus affecting the preparation quality of the intermediates, and incomplete drainage of water trapped in the pharmaceutical intermediates, thus affecting the drying quality.

[0006] This invention provides a pharmaceutical intermediate screening and drying device, comprising a base platform. A screening and draining integrated mechanism is installed on the left side of the upper surface of the base platform, and a segmented drying mechanism is installed on the right side of the upper surface of the base platform. A transfer mechanism for connecting the screening and draining integrated mechanism and the segmented drying mechanism is installed in the middle of the upper surface of the base platform. The segmented drying mechanism includes: a drying chamber fixedly connected to the upper part of the base platform; a mounting plate fixedly connected between the left and right walls of the drying chamber; several conical cylinders equidistantly arranged on the mounting plate; several mounting rings with gradually increasing radii, sequentially fixed to the inner wall of the conical cylinders from bottom to top via fixed columns; and a valve component located at the lower port of the conical cylinders. Several rotating rings are circumferentially equidistantly rotatably connected to the outer side of the mounting rings, and torsion springs are fixedly connected between the rotating rings and the mounting rings. Baffles are fixedly connected to the outer side of the rotating rings, and elastic plates are fixedly connected between adjacent baffles. A counterweight is fixedly connected to the outer side of the rotating rings via a lever.

[0007] In one possible implementation, the integrated screening and dewatering mechanism includes a cylinder fixedly connected to a base platform. The transfer mechanism includes several guide rails equidistantly embedded in the cylinder, with the length of the guide rails increasing sequentially from top to bottom. Each guide rail consists of a straight section and a curved section fixedly connected to the right side of the straight section. A through hole is provided at the lower part of the curved section of each guide rail. A conveying pipe communicating with the through hole is fixedly connected to the lower end face of the guide rail. The number of conveying pipes corresponds to the conical cylinder, and their lower ends are connected to the upper part of the drying chamber. An electric slider is slidably arranged on the upper part of the guide rail, and a through groove is provided on the upper end face of the electric slider.

[0008] In one possible implementation, the integrated screening and draining mechanism further includes several open slots equidistantly opened on the right side of the cylinder corresponding to the guide rail. A cylinder door assembly is installed on the open slots. The left side of the guide rail extends through the cylinder and into the cylinder. The upper part of the electric slider is rotatably connected to a conical screen that communicates with the through slot via a drive ring. A draining cylinder is fixedly connected to the upper part of the conical screen. An mounting plate is fixedly connected to the arc-shaped inner wall of the conical screen via a connecting rod. Several elastic rods are fixedly connected circumferentially at equal intervals on the upper end face of the mounting plate. Several rake rods are fixedly connected equidistantly on the side of the elastic rods near the axis of the draining cylinder. Several dividing slices are fixedly connected equidistantly on the side of the elastic rods near the draining cylinder. A counterweight ball is fixedly connected to the upper end of the elastic rod.

[0009] In one possible implementation, a material guiding unit is installed on the upper part of a section of the guide rail located inside the cylinder. The material guiding unit includes a spring telescopic column fixedly connected to the front and rear opposite sides of the guide rail, a support block fixedly connected to the end of the spring telescopic column, and a material guiding cover fixedly connected to the upper end face of the support block. The material guiding cover is in an inclined state with the side closer to the guide rail being higher and the side farther away from the guide rail being lower. Arrow-shaped extrusion blocks for cooperating with the material guiding cover are fixedly connected to both sides of the electric slider.

[0010] In one possible implementation, the gate assembly includes an arc-shaped gate symmetrically hinged to an open slot via a pivot axis. A tension spring is fixedly connected to the outside of the arc-shaped gate, with one end of the tension spring away from the arc-shaped gate fixedly connected to the outside of the cylinder via a fixing block. An arc-shaped pressure plate is fixedly connected to the inner arc surface of the arc-shaped gate via a connecting plate, and a roller is rotatably connected to the side of the arc-shaped pressure plate near the drain cylinder via a convex plate.

[0011] In one possible implementation, S-shaped flat tubes are fixedly connected to the front and rear walls of the drying oven. Several air outlets are equidistantly opened on the side of the S-shaped flat tubes near the conical cylinder along its own path, and a fan is installed at the end of the S-shaped flat tubes.

[0012] In one possible implementation, the inner circumference of the cylinder is provided with several guide grooves at equal intervals, and a water collection box is detachably connected to the bottom of the cylinder.

[0013] As can be seen from the above technical solutions, the present invention has the following advantages:

[0014] In this invention, the centrifugal force generated during the rotation of the conical cylinder drives the rotating ring to rotate, causing the baffle to abut against the inner wall of the conical cylinder, thus dividing the conical cylinder into multiple regions. Furthermore, the centrifugal force generated during the rotation of the conical cylinder drives the pharmaceutical intermediates inside to move from bottom to top along the inside of the conical cylinder, ensuring that the pharmaceutical intermediates are evenly spread out and uniformly heated, thereby improving the preparation quality of the pharmaceutical intermediates.

[0015] In this invention, the reciprocating intermittent rotation of the conical mesh disc in the integrated screening and dewatering mechanism generates centrifugal force, causing the elastic rod to repeatedly expand outward and contract inward, breaking up the piled-up pharmaceutical intermediates into a loose state. The centrifugal force generated during the rotation of the dewatering cylinder can then thoroughly drain the water trapped in the pharmaceutical intermediates, accelerating the subsequent drying process.

[0016] In this invention, the electric slider, guide rail and conveying pipe in the transfer mechanism are combined to move the conical mesh disk along the path of the guide rail to the top of the segmented drying mechanism, so that the dried and screened pharmaceutical intermediates can be quickly transferred to the segmented drying mechanism, which facilitates the rapid transfer of pharmaceutical intermediates between various processing steps. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the pharmaceutical intermediate screening and drying device provided by the present invention.

[0019] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0020] Figure 3 Provided by the present invention Figure 2 An enlarged schematic diagram of part A of the structure.

[0021] Figure 4 This is a schematic diagram of the installation structure of the material guiding unit provided by the present invention.

[0022] Figure 5 This is a cross-sectional view of the installation structure of the drain cylinder provided by the present invention.

[0023] Figure 6 This is a cross-sectional view of the segmented drying mechanism provided by the present invention.

[0024] Figure 7 This is a cross-sectional three-dimensional structural diagram of the conical cylinder provided by the present invention.

[0025] Figure 8 A front-view cross-sectional structural diagram of the conical cylinder and mounting ring provided by the present invention (part of the rotating ring and baffle are not shown).

[0026] The above figures include the following reference numerals:

[0027] 1. Base platform; 2. Integrated screening and draining mechanism; 21. Cylinder body; 22. Cylinder door assembly; 221. Arc-shaped cylinder door; 222. Arc-shaped pressure plate; 223. Roller; 23. Conical mesh tray; 24. Draining cylinder; 25. Elastic rod; 26. Rake rod; 3. Segmented drying mechanism; 31. Drying box; 32. Mounting plate; 33. Conical cylinder; 34. Mounting ring; 35. Rotary ring; 36. Baffle; 37. Counterweight; 4. Transfer mechanism; 41. Guide rail; 42. Conveying pipe; 43. Electric slider; 5. Material guiding unit; 51. Spring telescopic column; 52. Material guiding cover; 53. Arrow-shaped extrusion block; 6. S-shaped flat tube; 7. Guide channel. Implementation

[0028] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Please see Figure 1 and Figure 2 The present invention provides a technical solution: a pharmaceutical intermediate screening and drying device, including a base platform 1, a screening and draining integrated mechanism 2 installed on the left side of the upper end face of the base platform 1, a segmented drying mechanism 3 installed on the right side of the upper end face of the base platform 1, and a transfer mechanism 4 for connecting the screening and draining integrated mechanism 2 and the segmented drying mechanism 3 installed in the middle of the upper end face of the base platform 1.

[0030] Please see Figure 2 , Figure 3 and Figure 5 In this embodiment, the integrated screening and draining mechanism 2 includes a cylinder 21 fixedly connected to the base platform 1. The transfer mechanism 4 includes several guide rails 41 equidistantly embedded in the cylinder 21 and an electric slider 43 slidably connected to the guide rails 41. Several open slots corresponding to the guide rails 41 are equidistantly opened on the right side of the cylinder 21. A cylinder door assembly 22 is installed on the open slot. The left side of the guide rails 41 penetrates the cylinder 21 and extends into the interior of the cylinder 21. The upper part of the electric slider 43 is rotatably connected to a conical mesh disk 23 communicating with a through groove via a drive ring. A draining cylinder 24 is fixedly connected to the upper part of the conical mesh disk 23. The draining cylinder 24 drains water from the draining cylinder 24. The diameter of the holes is smaller than the diameter of the crystal particles. The mesh size of the conical mesh disks 23 arranged from top to bottom gradually decreases. The inner wall of the conical mesh disks 23 is fixedly connected to the mounting plates by connecting rods. Several elastic rods 25 are fixedly connected to the upper end face of the mounting plates at equal intervals around the circumference. Several rake rods 26 are fixedly connected to the side of the elastic rods 25 near the axis of the drain cylinder 24 at equal intervals. Several dividing slices are fixedly connected to the side of the elastic rods 25 near the drain cylinder 24 at equal intervals. A counterweight ball is fixedly connected to the upper end of the elastic rods 25. Several guide grooves 7 are opened at equal intervals on the inner wall of the cylinder 21. A water collection box is detachably connected to the bottom of the cylinder 21.

[0031] Please see Figure 4 The gate assembly 22 includes an arc-shaped gate 221 symmetrically hinged to the open slot via a pivot axis. A tension spring is fixedly connected to the outside of the arc-shaped gate 221. One end of the tension spring away from the arc-shaped gate 221 is fixedly connected to the outside of the cylinder 21 via a fixing block. An arc-shaped pressure plate 222 is fixedly connected to the inner arc surface of the arc-shaped gate 221 via a connecting plate. A roller 223 is rotatably connected to the side of the arc-shaped pressure plate 222 near the drain cylinder 24 via a convex plate.

[0032] The crystalline particles are poured into the uppermost drain cylinder 24. Then, the uppermost drive ring is controlled to drive the conical mesh disk 23 to rotate intermittently forward and backward. The conical mesh disk 23 then drives the drain cylinder 24 to move synchronously. Under the action of centrifugal force, the crystalline particles in the drain cylinder 24 adhere to the inner wall of the drain cylinder 24, causing the water trapped in the crystalline particles to be separated and thrown through the drain holes on the drain cylinder 24 onto the inner wall of the cylinder body 21. The water droplets on the inner wall of the cylinder body 21 are collected together by the guide groove 7 and flow into the water collection box. Simultaneously, the centrifugal force generated during the rotation of the conical mesh disk 23 causes the elastic rod 25 to deform and move closer to the inner wall of the drain cylinder 24. When the conical mesh disk 23 changes from forward to reverse rotation or from reverse to forward rotation, the elastic rod 25 returns to its original position. The initial shape, intermittently expanding outward and contracting inward, while the elastic rod 25 moves, drives the rake rod 26 and the slicing plate to move in the crystal particles, thereby breaking up the accumulated crystal particles and making the crystal particles loose, which facilitates further drainage of water trapped in the crystal particles, enhancing the drainage effect. The uppermost conical mesh disk 23 can also screen crystal particles of different sizes during its reciprocating rotation. The screened crystal particles fall onto the lower conical mesh disk 23, and then the lower conical mesh disk 23 repeats the steps of the upper conical mesh disk 23, screening and draining the crystal particles again. This allows for multi-stage screening and grading of crystal particles while draining water.

[0033] Please see Figure 2 , Figure 3 and Figure 4 In this embodiment, the transfer mechanism 4 also includes a conveying pipe 42. The length of the guide rail 41 increases from top to bottom. The guide rail 41 consists of a straight section and a curved section fixedly connected to the right side of the straight section. Each curved section of the guide rail 41 has a through hole at its lower part. The lower end face of the guide rail 41 is fixedly connected to a conveying pipe 42 communicating with the through hole. The number of conveying pipes 42 corresponds to the number of conical cylinders 33, and their lower ends are connected to the upper part of the drying chamber 31. An electric slider 43 is slidably arranged on the upper part of the guide rail 41. The upper end of the electric slider 43... A through groove is provided on the surface. A material guiding unit 5 is installed on the upper part of a section of the guide rail 41 located inside the cylinder 21. The material guiding unit 5 includes a spring telescopic column 51 fixedly connected to the front and rear opposite sides of the guide rail 41, a support block fixedly connected to the end of the spring telescopic column 51, and a material guiding cover 52 fixedly connected to the upper end face of the support block. The material guiding cover 52 is in an inclined state with the side closer to the guide rail 41 being higher and the side farther away from the guide rail 41 being lower. Arrow-shaped extrusion blocks 53 for cooperating with the material guiding cover 52 are fixedly connected to both sides of the electric slider 43.

[0034] After the crystalline particles have been drained and screened, the conical screen 23 is moved to the right by the electric slider 43 and removed from the cylinder 21. As the electric slider 43 moves the conical screen 23 to the right, the tension spring pulls the arc-shaped cylinder door 221 to gradually open until it is fully open. Then the conical screen 23 can be removed from the cylinder 21. (When it is necessary to move the conical screen 23 into the cylinder 21, the electric slider 43 moves the conical screen 23 to the left. The draining cylinder 24 moves to the left with the conical screen 23 and touches the arc-shaped pressure plate 222. Then the pressure plate 222 moves to the left.) The arc-shaped pressure plate 222 then drives the arc-shaped cylinder door 221 to rotate and gradually close through the connecting plate, so that the cylinder 21 can be automatically closed during the dewatering and screening process. When the dewatering cylinder 24 rotates during operation, it will drive the roller 223 to rotate, so as to ensure that the dewatering cylinder 24 can rotate normally during operation. The electric slider 43 drives the conical screen 23 to move gradually to the right along the path of the guide rail 41 until it moves to communicate with the through hole. Then, the crystalline particles on the conical screen 23 enter the conveying pipe 42 through the through groove, so that the crystalline particles after screening and drying can be quickly transferred to the next processing step.

[0035] The inclined guide cover 52 guides the crystalline particles that fall after screening to one side during the rotation of the conical screen 23, allowing the crystalline particles to enter the next conical screen 23 normally. This avoids the crystalline particles after screening accumulating on the guide rail 41 and obstructing it. During the electric sliding motion that drives the conical screen 23 to move to the right, the inclined surface of the arrow-shaped extrusion block 53 abuts against the junction between the two guide plates, thereby squeezing the two guide plates away from each other and allowing the electric slider 43 to move normally.

[0036] Please see Figure 2 , Figure 6 , Figure 7 and Figure 8In this embodiment, the segmented drying mechanism 3 includes: a drying chamber 31 fixedly connected to the upper part of the base platform 1; a mounting plate 32 fixedly connected between the left and right cavity walls of the drying chamber 31; a plurality of conical cylinders 33 equidistantly arranged on the mounting plate 32; a plurality of mounting rings 34, which are sequentially fixedly connected to the inner wall of the conical cylinders 33 from bottom to top by fixed columns and whose radii gradually increase; and a valve component disposed at the lower port of the conical cylinders 33. A plurality of rotating rings 35 are equidistantly rotatably connected to the outer circumference of the mounting rings 34, and a torsion spring (not shown in the figure) is fixedly connected between the rotating rings 35 and the mounting rings 34. A baffle 36 is fixedly connected, and an elastic sheet is fixedly connected between two adjacent baffles 36. A counterweight 37 is fixedly connected to the outside of the rotating ring 35 through a lever. S-shaped flat tubes 6 are fixedly connected to the front and rear walls of the drying oven 31. Several air outlets are equidistantly opened on the side of the S-shaped flat tube 6 near the conical cylinder 33 along its own path. A fan is installed at the end of the S-shaped flat tube 6. By controlling the operation of the fan, air is blown into the S-shaped flat tube 6. After the airflow enters the S-shaped flat tube 6, it is blown from the air outlets to the conical cylinder 33, thereby making the airflow outside the conical cylinder 33 flow and ensuring that the conical cylinder 33 can be heated evenly.

[0037] The crystalline particles entering the feed pipe 42 then flow into the conical cylinder 33 located directly below the feed pipe 42. An external drive unit rotates the conical cylinder 33. During this rotation, the counterweight 37 moves closer to the conical cylinder 33 under centrifugal force, which in turn drives the rotating ring 35 to rotate via a lever. The rotating ring 35 then drives the baffle 36 to rotate until the baffle 36 contacts the inner wall of the conical cylinder 33, filling the gap between the mounting ring 34 and the conical cylinder 33. Subsequently, under the centrifugal force of the rotating conical cylinder 33, the crystalline particles move from bottom to top along the inner wall of the conical cylinder 33. The cone gradually moves, and the baffle 36 ensures that the crystalline particles are evenly covered on the inner wall of the cone 33 during the spreading process. This ensures that the thickness of the crystalline particles after spreading is within a reasonable range, allowing the crystalline particles to be heated evenly and dried. After drying, the cone 33 stops rotating, and then the rotating ring 35 is driven to rotate under the action of the torsion spring. The rotating ring 35 then drives the baffle 36 to rotate and separate from the cone 33, so that the gap between the mounting ring 34 and the cone 33 is exposed again. Then, under the action of gravity, the crystalline particles flow downward. At the same time, the control valve opens, and the dried crystalline particles can be taken out.

[0038] During operation, the crystalline particles are first poured into the integrated screening and draining mechanism 2. The mechanism utilizes a combination of several longitudinally equidistant draining cylinders 24 and a conical mesh disc 23 to effectively and thoroughly drain the water from the crystalline particles and perform multi-stage screening. Next, the transfer mechanism 4 moves the conical mesh disc 23 directly above the segmented drying mechanism 3, allowing the drained and screened crystalline particles to enter the drying mechanism. Finally, the centrifugal force generated by the rotation of the conical cylinder 33 in the segmented drying mechanism 3 causes the crystalline particles to gradually rise along the cylinder wall. This, combined with the baffle 36, ensures that the crystalline particles are evenly covered on the inner wall of the conical cylinder 33, guaranteeing uniform heating and improving the drying quality of the crystals.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A pharmaceutical intermediate sieving and drying apparatus, comprising a base platform (1), characterized in that: The bottom platform (1) is equipped with a screening and draining integrated mechanism (2) on the left side of the upper end face, a segmented drying mechanism (3) on the right side of the upper end face, and a transfer mechanism (4) for connecting the screening and draining integrated mechanism (2) and the segmented drying mechanism (3) on the middle side of the upper end face. The segmented drying mechanism (3) includes: A drying box (31) fixedly connected to the upper part of the base (1), an installation plate (32) fixedly connected between the left and right cavity walls of the drying box (31), several conical cylinders (33) equidistantly arranged on the installation plate (32), several installation rings (34) fixedly connected to the inner wall of the conical cylinder (33) from bottom to top through fixed columns and with gradually increasing radius, and a valve component set at the lower port of the conical cylinder (33); The mounting ring (34) is circumferentially equidistantly connected to several rotating rings (35), and the rotating rings (35) and the mounting ring (34) are fixedly connected to a torsion spring. A baffle (36) is fixedly connected to the outside of the rotating ring (35), and an elastic sheet is fixedly connected between two adjacent baffles (36). A counterweight (37) is fixedly connected to the outside of the rotating ring (35) through a lever. An external drive device drives the conical cylinder (33) to rotate. During the rotation of the conical cylinder (33), the counterweight (37) moves closer to the conical cylinder (33) under the action of centrifugal force, and then drives the rotating ring (35) to rotate through the lever. The rotating ring (35) then drives the baffle (36) to rotate until the baffle (36) touches the inner wall of the conical cylinder (33) and fills the gap between the mounting ring (34) and the conical cylinder (33). The integrated screening and draining mechanism (2) includes a cylinder (21) fixedly connected to the base (1). The transfer mechanism (4) includes several guide rails (41) equidistantly embedded on the cylinder (21). The length of the guide rails (41) increases from top to bottom. The guide rails (41) consist of a straight section and a curved section fixedly connected to the right side of the straight section. Each guide rail (41) has a through hole at the bottom of the curved section. The lower end of the guide rail (41) is fixedly connected to a conveying pipe (42) communicating with the through hole. The number of conveying pipes (42) corresponds to the number of conical cylinders (33) and their lower ends are connected to the upper part of the drying box (31). An electric slider (43) is slidably arranged on the upper part of the guide rail (41). The upper end of the electric slider (43) has a through groove. The integrated screening and draining mechanism (2) further includes several open slots equidistantly opened on the right side of the cylinder (21) corresponding to the guide rail (41). A cylinder door assembly (22) is installed on each open slot. The left side of the guide rail (41) extends through the cylinder (21) into its interior. A conical screen (23) communicating with a through slot is rotatably connected to the upper part of the electric slider (43) via a drive ring. A draining cylinder is fixedly connected to the upper part of the conical screen (23). 24) The conical mesh disk (23) has an arc-shaped inner wall fixedly connected to an installation piece by a connecting rod. Several elastic rods (25) are fixedly connected circumferentially at equal intervals on the upper end face of the installation piece. Several rake rods (26) are fixedly connected equidistantly on the side of the elastic rod (25) near the axis of the drain cylinder (24). Several dividing slices are fixedly connected equidistantly on the side of the elastic rod (25) near the drain cylinder (24). A counterweight ball is fixedly connected to the upper end of the elastic rod (25). The drying oven (31) has S-shaped flat tubes (6) fixedly connected to the front and rear walls of the cavity. The S-shaped flat tubes (6) have several air outlets equidistantly opened on the side near the conical cylinder (33) along their own path. A fan is installed at the end of the S-shaped flat tubes (6).

2. The pharmaceutical intermediate screening and drying device according to claim 1, characterized in that: The guide rail (41) is located inside the cylinder (21) and a material guiding unit (5) is installed on the upper part of the section. The material guiding unit (5) includes a spring telescopic column (51) fixedly connected to the front and rear opposite sides of the guide rail (41), a support block fixedly connected to the end of the spring telescopic column (51), and a material guiding cover (52) fixedly connected to the upper end face of the support block. The material guiding cover (52) is in an inclined state with the side closer to the guide rail (41) higher and the side farther away from the guide rail (41) lower. The electric slider (43) is fixedly connected to arrow-shaped extrusion blocks (53) on both the left and right sides for cooperating with the material guiding cover (52).

3. The pharmaceutical intermediate screening and drying device according to claim 1, characterized in that: The gate assembly (22) includes an arc-shaped gate (221) symmetrically hinged to the open slot via a pivot axis. A tension spring is fixedly connected to the outside of the arc-shaped gate (221). The end of the tension spring away from the arc-shaped gate (221) is fixedly connected to the outside of the cylinder (21) via a fixing block. An arc-shaped pressure plate (222) is fixedly connected to the inner arc surface of the arc-shaped gate (221) via a connecting plate. A roller (223) is rotatably connected to the side of the arc-shaped pressure plate (222) near the drain cylinder (24) via a convex plate.

4. The pharmaceutical intermediate screening and drying device according to claim 1, characterized in that: The inner wall of the cylinder (21) is provided with several guide grooves (7) at equal intervals, and the bottom of the cylinder (21) is detachably connected to a water collection box.

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