Medicine dispensing and mixing device for medicine production

Abstract

The invention provides a medicine dispensing and mixing device for medicine production, which comprises a shell provided with a feed pipe and a discharge pipe; a charging barrel; a stirring assembly; the driving assembly is mounted on the shell and is used for driving the charging barrel to rotate by taking the axis of the stirring assembly as the center; the transmission assembly is in transmission connection with the charging barrel and the stirring assembly and is used for driving the stirring assembly to rotate in the direction opposite to the rotating direction of the charging barrel; a controller; when the driving assembly drives the charging barrel to rotate in the forward direction, the transmission assembly transmits the rotating motion of the charging barrel to the stirring assembly, so that the stirring assembly rotates in the reverse direction, and materials are stirred by the stirring assembly while rotating along with the charging barrel; the charging barrel is obliquely arranged and can rotate in the forward direction, so that materials fully roll under the combined action of gravity and centrifugal force. Meanwhile, the stirring assembly and the charging barrel rotate in opposite directions, the materials are efficiently and uniformly mixed in multiple directions through the bidirectional action of the inner and outer stirring blades, and it is ensured that the mixing uniformity is superior to that of a traditional single stirring mode.

Description

Technical Field

[0001] The invention relates to the technical field of medicine dispensing and mixing devices, in particular to a medicine dispensing and mixing device for medicine production. Background Art

[0002] In drug production, dispensing and mixing are extremely critical links. In the process of drug preparation, multiple ingredients need to be mixed evenly in a specific ratio to ensure drug efficacy and safety. Therefore, the uniformity of the mixing device, the accuracy of dispensing, the mixing time and the sealing of the equipment are crucial to the quality of the drug. At present, the mixing devices commonly used in drug production are mainly divided into the following categories: 1. Stirring mixing device. Conventional stirring mixing devices mostly use stirring paddles to rotate in the container for mixing. They have simple structure and convenient operation. However, due to the different viscosities and specific gravities of the mixed materials, they often lead to problems such as uneven mixing and dead corners, which makes it difficult to meet the mixing requirements of high-precision drug production. In addition, the traditional stirring method is prone to mechanical wear, causing tiny particles to mix into the drug solution, affecting the purity of the drug. 2. Vibrating mixing device. The vibrating mixer uses vibration to make the materials collide and rub against each other, thereby achieving uniform mixing. Although this method can improve the mixing effect to a certain extent, the vibration may cause uneven suspension of fine particles, the drug distribution is not accurate enough, and the vibration process is prone to generate dust, which may cause drug pollution or waste. 3. High-speed shearing mixing device: The high-speed shearing mixing device shears and disperses the materials through a high-speed rotating shear head to achieve uniform mixing. Although its mixing uniformity is high, the equipment manufacturing cost and maintenance cost are high, and the equipment sealing requirements are also high. In addition, heat is easily generated during the high-speed shearing process, which is not suitable for heat-sensitive drugs. Therefore, it is of great significance to design a device that can meet the mixing needs of high-precision drug production. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a drug dispensing and mixing device for drug production, which can achieve efficient and uniform multi-directional mixing of materials.

[0004] To achieve the above object, the present invention adopts the following technical solution: A drug dispensing and mixing device for drug production, comprising: The shell has a feed pipe on one side and a discharge pipe on the other side; The barrel is rotatably installed in the shell and connected to the discharge pipe at the bottom; A stirring assembly is installed on the upper part of the barrel, with the upper end extending to the outside of the barrel and connected to the feed pipe, and the lower end extending to the inside of the barrel; A driving assembly is mounted on the housing and is used to drive the barrel to rotate around the axis of the stirring assembly; A transmission assembly is installed inside the housing, and is used to drive the mixing assembly to rotate in a direction opposite to the rotation direction of the barrel. A controller, fixed to the housing, for controlling the operation of the drive assembly; When the driving assembly drives the barrel to rotate in the forward direction, the transmission assembly transmits the rotational motion of the barrel to the stirring assembly, causing the stirring assembly to rotate in the reverse direction, so that the material is stirred by the stirring assembly while following the rotation of the barrel.

[0005] In this embodiment, a control panel is fixedly disposed on the outside of the shell, and the control panel is electrically connected to the controller.

[0006] In this embodiment, a discharge joint is provided at the bottom of the barrel, a solenoid valve is installed in the discharge joint, and the solenoid valve is electrically connected to the controller; a first bearing is installed outside the discharge joint, and one end of the discharge pipe is sleeved and installed on the first bearing.

[0007] In this embodiment, the stirring assembly includes an outer tube and an inner tube; a first mounting hole is provided on the upper part of the barrel, a second bearing is provided in the first mounting hole, and the outer tube is rotatably mounted on the barrel through the second bearing; one end of the outer tube extends to the inside of the barrel, and the other end extends to the outside of the barrel; a first stirring blade is installed at one end of the outer tube located inside the barrel, and a transmission sleeve is fixedly installed at one end located outside the barrel, and a guide strip is fixedly provided on the inner side surface of the transmission sleeve, and the guide strip extends in a direction parallel to the axis of the transmission sleeve; the inner tube is plugged into the outer tube, and both ends of the inner tube extend to the outside of the outer tube; a second stirring blade is installed at one end of the inner tube close to the first stirring blade; a guide groove adapted to the guide strip is provided on the outer wall of the inner tube, and the guide groove extends in a direction parallel to the axis of the inner tube; the guide strip is slidably arranged in the guide groove; the inner tube and the outer tube have the same angular velocity of rotation.

[0008] In this embodiment, the driving assembly includes a driving motor, a driving gear, a driven gear, a driven shaft, a bracket, a driving bevel gear, and a driven bevel gear; the driving motor and the bracket are fixed on the housing; the driven shaft is rotatably mounted on the bracket; the driving gear is mounted on the output shaft of the driving motor; the driven gear is mounted on the driven shaft and meshes with the driving gear for transmission; the driving bevel gear is mounted on the driven shaft; the driven bevel gear is sleeved and mounted on the barrel and meshes with the driving bevel gear for transmission.

[0009] In this embodiment, the barrel includes a barrel body and a barrel cover, and the barrel cover is fixed on the barrel body; a circular hole is provided on the barrel cover to accommodate the outer tube passing through; the transmission assembly includes a cover plate, a gear ring, a first gear, a second gear and a third gear; the cover plate is fixed on the shell; the gear ring is fixed on the cover plate; the third gear is installed on the outer tube; a first column and a second column are provided on the cover plate; the first gear is rotatably installed on the first column and meshes with the gear ring for transmission; the second gear is rotatably installed on the second column and meshes with the first gear and the third gear for transmission; when the barrel rotates, the first gear rotates around the axis of the gear ring while rotating on its own, and the third gear is driven to rotate by the second gear, so that the outer tube rotates in a direction opposite to the rotation direction of the barrel.

[0010] In this embodiment, a push block is fixedly provided on the end of the inner tube away from the second stirring blade; the push block is provided with a feed hole connected to the inner tube; the outer diameter of the push block is larger than the outer diameter of the inner tube; the end surface of the push block away from the inner tube is provided with a working inclined surface, and a positioning groove is provided on the working inclined surface; a push rod is fixedly provided in the shell, and one end of the push rod can be movably inserted into the positioning groove; a spring is sleeved on the outside of the inner tube, one end of the spring abuts against the push block, and the other end is fixed on the cover plate.

[0011] In this embodiment, a wear-resistant pad is fixedly provided on the push block, and one end of the spring abuts against the wear-resistant pad.

[0012] In this embodiment, a material guide pipe is fixedly provided on the shell; one end of the material guide pipe is connected to the feed pipe, and the other end passes through the feed hole and is inserted into the inner tube.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The barrel is set obliquely and can rotate forward, so that the material can be fully rolled under the combined action of gravity and centrifugal force. At the same time, the stirring component rotates in the opposite direction to the barrel, and the bidirectional action of the inner and outer stirring blades enables the material to be efficiently and evenly mixed in multiple directions, ensuring that the mixing uniformity is better than the traditional single stirring method.

[0014] The stirring assembly includes an inner tube and an outer tube, and the push block on the inner tube produces axial reciprocating motion under the cooperation of the spring and the push rod, so that the second stirring blade also reciprocates synchronously. This design increases the shearing and disturbance of the material, significantly improves the material fluidity and stirring effect, and effectively solves the technical problem of easy agglomeration or unevenness of materials in traditional equipment.

[0015] The solenoid valve of the discharge joint is connected to the control panel through the controller to achieve automatic control. After mixing is completed, the solenoid valve can be controlled to open through the control panel to accurately discharge the material, avoid material retention, and improve the discharge efficiency, meeting the needs of drug production for efficient and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 3 It is a structural relationship diagram of the stirring component, the driving component and the transmission component in the present invention; Figure 4 for Figure 3 A partial enlarged view of the middle A; Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure of; Figure 6 for Figure 5 A partial enlarged view of point B in the middle; Figure 7 for Figure 3 Schematic diagram of structural decomposition; Figure 8 for Figure 7 A partial enlarged view of point C in the middle; Fig. 9 It is a schematic diagram of the structure of the inner tube in the present invention; Fig.10 for Fig. 9 A local enlarged view of D in FIG. Fig.11 It is a structural schematic diagram of the outer tube in the present invention; Fig.12 for Fig.11 A partial enlarged view of point E in the middle.

[0017] in: 1. Feed pipe; 2. Shell; 3. Drive assembly; 31. Barrel; 32. Discharge pipe; 33. Driven shaft; 34. Bracket; 35. Driving gear; 36. Driving motor; 37. Driven gear; 38. Driving bevel gear; 39. Push block; 310. Guide pipe; 311. Push rod; 312. Cover plate; 313. Driven bevel gear; 314. Outer tube; 315. First stirring blade; 316. Discharge joint; 317. Second stirring blade; 318. Spring; 319. Transmission sleeve; 320. Guide groove; 321. Inner tube; 322. First column; 323. First gear; 324. Second column; 325. Second gear; 326. Third gear; 327. Gear ring; 328. Barrel cover; 329. Positioning groove; 330. Working inclined plane; 331. Guide strip; 4. Controller. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 12As shown, a drug dispensing and mixing device for drug production comprises: The shell 2 is provided with a feed pipe 1 on one side and a discharge pipe 32 on the other side; the shell 2 is made of high-strength, corrosion-resistant stainless steel material to ensure that it will not corrode or deform due to the chemical properties of the drug material during long-term use. A multi-layer sealing structure is designed inside the shell 2, which can effectively isolate the contact between the outside air and the material, prevent pollution, and maintain the purity of the drug. The feed pipe 1 on one side is connected to the drug raw material supply device to facilitate the automatic introduction of the raw materials. The feed pipe 1 is also equipped with a filter to prevent impurities in the raw materials from entering the device. The discharge pipe 32 is connected to the drug packaging device. When the material mixing is completed, the controller 4 will automatically open the solenoid valve to ensure that the material flows out without pollution. The shell 2 is also equipped with a heat dissipation and ventilation device to prevent the internal temperature from being too high during long-term operation, thereby affecting the stability of the equipment.

[0020] The barrel 31 is rotatably installed in the housing 2, and the lower part is connected to the discharge pipe 32; the barrel 31 is designed to be an inclined structure, and the oblique installation can make the material evenly distributed from top to bottom inside the barrel 31. The action of gravity and centrifugal force allows the material to always be close to the barrel wall during the rotation, so as to obtain a more uniform mixing effect during the stirring process. The lower part of the barrel 31 is connected to the discharge pipe 32 through a precision bearing, and a dynamic sealing design is adopted to effectively prevent leakage during rotation. In addition, the surface of the barrel 31 is also coated with an anti-stick coating to reduce material residue and facilitate subsequent cleaning and maintenance.

[0021] The stirring assembly is installed on the upper part of the barrel 31, with the upper end extending to the outside of the barrel 31 and connected to the feed pipe 1, and the lower end extending to the inside of the barrel 31; the stirring assembly adopts a double-layer stirring structure, including both horizontal stirring blades and vertical stirring rods, which can deeply flip and stir the materials to ensure that all materials are mixed evenly in a short time. A sealing cover is also provided on the outside of the stirring assembly, which forms a fully sealed channel when connected to the feed pipe 1 to avoid being affected by external air during the material addition process and maintain the purity of the drug material.

[0022] The drive assembly 3 is mounted on the housing 2 and is used to drive the barrel 31 to rotate around the axis of the stirring assembly; the drive assembly 3 is driven by a high-precision servo motor and a gear system, which can achieve precise control of the speed of the barrel 31, adjust the speed according to different drug mixing requirements, and ensure the uniformity of the material. The power of the servo motor is matched with the load, which not only ensures sufficient power output, but also avoids the occurrence of overload, thereby extending the service life of the device.

[0023] The transmission assembly is installed inside the shell 2, and connects the barrel 31 and the stirring assembly, and is used to drive the stirring assembly to rotate in a direction opposite to the rotation direction of the barrel 31; the counter-rotating stirring assembly stirs and flips the material in multiple directions during the rotation of the barrel 31, thereby preventing the material from being deposited at the bottom of the barrel 31, and at the same time greatly improving the mixing efficiency and uniformity of the material.

[0024] The controller 4 is fixed on the housing 2 and is used to control the operation of the driving component 3. The controller 4 adopts a programmable control system, which can set different mixing times, stirring speeds and material ratios to ensure that drug materials that meet the standards can be obtained in each production. The controller 4 is also equipped with a remote monitoring interface, which can monitor and adjust the mixing process in real time by connecting external devices. Through the control panel, the operator can quickly set the mixing parameters, start or stop the device, ensuring the intelligence of the device and the convenience of operation.

[0025] When the driving assembly 3 drives the barrel 31 to rotate in the forward direction, the transmission assembly transmits the rotational motion of the barrel 31 to the stirring assembly, causing the stirring assembly to rotate in the reverse direction, so that the material rotates with the barrel 31 and is stirred by the stirring assembly at the same time.

[0026] In this embodiment, a control panel is fixedly provided on the outside of the shell 2, and the control panel is electrically connected to the controller 4, which can conveniently realize the regulation and fault diagnosis of the equipment. The control panel is also equipped with an emergency stop button to ensure that the equipment can be quickly stopped under abnormal circumstances.

[0027] In this embodiment, a discharge connector 316 is provided at the bottom of the barrel 31, and a solenoid valve is installed in the discharge connector 316, and the solenoid valve is electrically connected to the controller 4; a first bearing is installed on the outside of the discharge connector 316, and one end of the discharge pipe 32 is sleeved and installed on the first bearing to ensure smooth flow of materials during discharge. The solenoid valve can automatically open and close according to the set mixing time, which is easy to operate.

[0028] In this embodiment, the stirring assembly includes an outer tube 314 and an inner tube 321; a first mounting hole is provided at the upper portion of the barrel 31, a second bearing is provided in the first mounting hole, and the outer tube 314 is rotatably mounted on the barrel 31 through the second bearing. One end of the outer tube 314 extends to the inside of the barrel 31, and the other end extends to the outside of the barrel 31; a first stirring blade 315 is installed at one end of the outer tube 314 located inside the barrel 31, and a transmission sleeve 319 is fixedly installed at one end located outside the barrel 31, and a guide bar 331 is fixedly provided on the inner side surface of the transmission sleeve 319, and the guide bar 331 extends in a direction parallel to the axis of the transmission sleeve 319. The inner tube 321 is inserted and installed in the outer tube 314, and both ends of the inner tube 321 extend to the outside of the outer tube 314; the second stirring blade 317 is installed on the end of the inner tube 321 close to the first stirring blade 315; the outer wall of the inner tube 321 is provided with a guide groove 320 adapted to the guide strip 331, and the guide groove 320 extends in a direction parallel to the axis of the inner tube 321; the guide strip 331 is slidably arranged in the guide groove 320; the inner tube 321 and the outer tube 314 have the same rotation angular velocity. The design of the multi-stage stirring blade improves the mixing effect and effectively solves the problem of mixing materials of different viscosities.

[0029] In this embodiment, the driving assembly 3 includes a driving motor 36, a driving gear 35, a driven gear 37, a driven shaft 33, a bracket 34, a driving bevel gear 38, and a driven bevel gear 313; the driving motor 36 and the bracket 34 are fixed to the housing 2; the driven shaft 33 is rotatably mounted on the bracket 34; the driving gear 35 is mounted on the output shaft of the driving motor 36; the driven gear 37 is mounted on the driven shaft 33 and meshes with the driving gear 35 for transmission; the driving bevel gear 38 is mounted on the driven shaft 33; the driven bevel gear 313 is sleeved and mounted on the barrel 31 and meshes with the driving bevel gear 38 for transmission.

[0030] In this embodiment, the barrel 31 includes a barrel body and a barrel cover 328, and the barrel cover 328 is fixed on the barrel body; a circular hole is provided on the barrel cover 328 to accommodate the outer tube 314 to pass through; the transmission assembly includes a cover plate 312, a ring gear 327, a first gear 323, a second gear 325 and a third gear 326; the cover plate 312 is fixed on the shell 2; the ring gear 327 is fixed on the cover plate 312; the third gear 326 is installed on the outer tube 314; the cover plate 312 is provided with a first column 322 and a second column 324; the first gear 323 is rotatably installed on the first column 322 and meshes with the ring gear 327 for transmission; the second gear 325 is rotatably installed on the second column 324 and meshes with the first gear 323 and the third gear 326 for transmission. When the barrel 31 rotates, the first gear 323 rotates around the axis of the gear ring 327 and rotates on its own, driving the third gear 326 to rotate through the second gear 325, so that the outer tube 314 rotates in a direction opposite to the rotation direction of the barrel 31.

[0031] In this embodiment, a push block 39 is fixedly provided on the end of the inner tube 321 away from the second stirring blade 317; a feed hole connected to the inner tube 321 is provided on the push block 39; the outer diameter of the push block 39 is greater than the outer diameter of the inner tube 321; a working inclined surface 330 is provided on the end surface of the push block 39 away from the inner tube 321, and a positioning groove 329 is provided on the working inclined surface 330; a push rod 311 is fixedly provided in the shell 2, and one end of the push rod 311 can be movably inserted into the positioning groove 329; a spring 318 is sleeved on the outside of the inner tube 321, one end of the spring 318 abuts on the push block 39, and the other end is fixed on the cover plate 312; in a natural state, the spring 318 pushes the push block 39 in the direction of the push rod 311, so that the push rod 311 can remain inserted in the positioning groove 329.

[0032] In this embodiment, a wear-resistant pad is fixedly provided on the push block 39, and one end of the spring 318 abuts against the wear-resistant pad to reduce friction.

[0033] In this embodiment, a material guide tube 310 is fixedly provided on the shell 2; one end of the material guide tube 310 is connected to the feed tube 1, and the other end passes through the feed hole and is inserted into the inner tube 321, ensuring that when the push block 39 drives the inner tube 321 to move along the axial direction of the inner tube 321, the feed tube 1 always remains connected with the inner tube 321.

[0034] How it works The core of this device is to use the rotation of the barrel 31 and the reverse rotation of the stirring assembly to achieve efficient mixing of drug materials. The driving assembly 3 drives the barrel 31 to rotate along its axial direction. At the same time, the transmission assembly transmits the rotation of the barrel 31 to the stirring assembly, causing the stirring assembly to rotate in the opposite direction. The material in the barrel 31 is evenly distributed on the barrel wall under the action of centrifugal force and gravity, while the first stirring blade 315 and the second stirring blade 317 of the stirring assembly continuously turn and stir the material to ensure the uniformity of the material during the mixing process. The multi-level stirring design can make drugs of different viscosities and densities fully contact and mix, avoid sedimentation, and improve mixing efficiency.

[0035] When the materials are mixed to the preset time and uniformity, the controller 4 will control the drive assembly 3 to gradually stop the rotation of the barrel 31 and the stirring assembly. At the same time, the discharge solenoid valve is opened, and the mixed materials flow to the discharge pipe 32 under the action of gravity and are introduced into the downstream packaging device. The operation of the entire device is automatically completed by the control system to ensure the accuracy and consistency of the mixing.

[0036] How to use Preparation and connection: Before starting the device, make sure that the feed pipe 1 is connected to the drug raw material supply equipment and the discharge pipe 32 is connected to the subsequent packaging equipment or container. Check whether the power supply and control system connection of the equipment are normal, and make sure that the parameters on the control panel are set correctly.

[0037] Parameter setting: Set the mixing time, stirring speed, rotation speed and other parameters on the control panel of the controller 4. According to the specific requirements of the drug, such as viscosity and density, select appropriate parameters to ensure the uniformity of the mixing process.

[0038] Feeding: Start the feeding system, and the drug raw material enters the barrel 31 through the feeding pipe 1.

[0039] Start stirring and mixing: Start the drive assembly 3, and the barrel 31 starts to rotate at a preset speed. At the same time, the transmission assembly will cause the stirring assembly to rotate in the opposite direction, and the stirring blades of the stirring assembly will stir and turn the materials in multiple directions to ensure uniform mixing. The stirring and mixing time can be controlled by the time setting on the control panel.

[0040] Monitoring process: During the mixing process, the control panel will display real-time mixing status parameters, and the operator can monitor various indicators through the screen and make adjustments as needed. If the mixing process is abnormal, the control system will sound an alarm and the operator can pause the equipment by pressing the emergency stop button.

[0041] Discharging: After mixing is completed, the control system automatically shuts down the stirring assembly and the rotation of the barrel 31. At this time, the controller 4 starts the discharging solenoid valve, opens the discharging pipe 32, and the material flows out of the barrel 31 under the action of gravity, enters the discharging pipe 32, and finally flows to the packaging equipment.

[0042] Cleaning and maintenance: After mixing is completed, turn off the power of the equipment. The cleaning liquid can be injected into the barrel 31, and the inside can be cleaned by repeatedly rotating the stirring assembly to remove the residual material and ensure the cleanliness of the next use.

Claims

1. A drug dispensing and mixing device for drug production, characterized in that: include: A housing (2) having a feed pipe (1) on one side and a discharge pipe (32) on the other side; The barrel (31) is rotatably and obliquely mounted in the housing (2), and the lower part is connected to the discharge pipe (32); A stirring assembly is installed on the upper part of the barrel (31), the upper end of which extends to the outside of the barrel (31) and is connected to the feed pipe (1), and the lower end of which extends to the inside of the barrel (31); A driving assembly (3) is mounted on the housing (2) and is used to drive the barrel (31) to rotate around the axis of the stirring assembly; A transmission assembly is installed inside the housing (2) to connect the barrel (31) and the stirring assembly in a transmission manner, and is used to drive the stirring assembly to rotate in a direction opposite to the rotation direction of the barrel (31); A controller (4), fixed on the housing (2), for controlling the operation of the drive assembly (3); When the driving assembly (3) drives the barrel (31) to rotate in the forward direction, the transmission assembly transmits the rotational motion of the barrel (31) to the stirring assembly, causing the stirring assembly to rotate in the reverse direction, so that the material rotates with the barrel (31) and is stirred by the stirring assembly.

2. A drug dispensing and mixing device for drug production as claimed in claim 1, characterized in that: A control panel is fixedly arranged on the outside of the housing (2), and the control panel is electrically connected to the controller (4).

3. A drug dispensing and mixing device for drug production as claimed in claim 1, characterized in that: A discharge joint (316) is provided at the bottom of the barrel (31), and a solenoid valve is installed in the discharge joint (316), and the solenoid valve is electrically connected to the controller (4); a first bearing is installed outside the discharge joint (316), and one end of the discharge pipe (32) is sleeved and installed on the first bearing.

4. A drug dispensing and mixing device for drug production as claimed in claim 1, characterized in that: The stirring assembly comprises an outer tube (314) and an inner tube (321); a first mounting hole is provided at the upper portion of the barrel (31), a second bearing is provided in the first mounting hole, and the outer tube (314) is rotatably mounted on the barrel (31) via the second bearing; one end of the outer tube (314) extends to the inside of the barrel (31), and the other end extends to the outside of the barrel (31); a first stirring blade (315) is installed at one end of the outer tube (314) located inside the barrel (31), and a transmission sleeve (319) is fixedly installed at one end located outside the barrel (31); a guide strip (331) is fixedly provided on the inner side surface of the transmission sleeve (319), and the guide strip (331) is arranged along the inner side surface of the transmission sleeve (319). The inner tube (321) is inserted and installed in the outer tube (314), and both ends of the inner tube (321) extend to the outside of the outer tube (314); a second stirring blade (317) is installed on the end of the inner tube (321) close to the first stirring blade (315); a guide groove (320) adapted to the guide strip (331) is provided on the outer wall of the inner tube (321), and the guide groove (320) extends in a direction parallel to the axis of the inner tube (321); the guide strip (331) is slidably arranged in the guide groove (320); the inner tube (321) and the outer tube (314) have the same rotation angular velocity.

5. A drug dispensing and mixing device for drug production as claimed in claim 1, characterized in that: The driving assembly (3) comprises a driving motor (36), a driving gear (35), a driven gear (37), a driven shaft (33), a bracket (34), a driving bevel gear (38), and a driven bevel gear (313); the driving motor (36) and the bracket (34) are fixed on the housing (2); the driven shaft (33) is rotatably mounted on the bracket (34); the driving gear (35) is mounted on the output shaft of the driving motor (36); the driven gear (37) is mounted on the driven shaft (33) and meshes with the driving gear (35) for transmission; the driving bevel gear (38) is mounted on the driven shaft (33); the driven bevel gear (313) is sleeved and mounted on the barrel (31) and meshes with the driving bevel gear (38) for transmission.

6. A drug dispensing and mixing device for drug production as claimed in claim 4, characterized in that: The barrel (31) comprises a barrel body and a barrel cover (328), wherein the barrel cover (328) is fixed on the barrel body; a round hole is provided on the barrel cover (328) for accommodating the outer tube (314) to pass through; the transmission assembly comprises a cover plate (312), a gear ring (327), a first gear (323), a second gear (325) and a third gear (326); the cover plate (312) is fixed on the housing (2); the gear ring (327) is fixed on the cover plate (312); the third gear (326) is mounted on the outer tube (314); the cover plate (312) is provided with a first column (322) and a a second column (324); a first gear (323) is rotatably mounted on the first column (322) and meshes with the gear ring (327) for transmission; a second gear (325) is rotatably mounted on the second column (324) and meshes with the first gear (323) and the third gear (326) for transmission; when the barrel (31) rotates, the first gear (323) rotates around the axis of the gear ring (327) and rotates on its own, and the third gear (326) is driven to rotate through the second gear (325), so that the outer tube (314) rotates in a direction opposite to the rotation direction of the barrel (31).

7. A drug dispensing and mixing device for drug production as claimed in claim 6, characterized in that: A push block (39) is fixedly arranged on one end of the inner tube (321) away from the second stirring blade (317); a feed hole connected to the inner tube (321) is arranged on the push block (39); the outer diameter of the push block (39) is greater than the outer diameter of the inner tube (321); a working inclined surface (330) is arranged on the end surface of the push block (39) away from the inner tube (321), and a positioning groove (329) is arranged on the working inclined surface (330); a push rod (311) is fixedly arranged in the shell (2), and one end of the push rod (311) can be movably inserted into the positioning groove (329); a spring (318) is sleeved on the outside of the inner tube (321), one end of the spring (318) abuts against the push block (39), and the other end is fixed on the cover plate (312).

8. A drug dispensing and mixing device for drug production as claimed in claim 7, characterized in that: A wear-resistant pad is fixedly arranged on the push block (39), and one end of the spring (318) abuts against the wear-resistant pad.

9. A drug dispensing and mixing device for drug production as claimed in claim 7, characterized in that: A material guide pipe (310) is fixedly arranged on the shell (2); one end of the material guide pipe (310) is connected to the feed pipe (1), and the other end passes through the feed hole and is inserted into the inner tube (321).

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