A pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization

Abstract

This invention belongs to the field of pharmaceutical drying technology and discloses a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization, including a machine body, a lifting cylinder, and a second waste gas guide channel. In use, the invention drives the spiral lifting blades through a waste gas power transmission component, achieving automatic lifting and discharge of the dried material. This eliminates the need for manual transfer, reducing operator workload, improving production efficiency, and avoiding material contamination during transfer, thus meeting the clean production requirements of the pharmaceutical industry. Simultaneously, the pneumatic reciprocating lifting component drives the periodic lifting and lowering of the material plate, continuously agitating the material during the drying process. This breaks the limitations of static drying in existing equipment, ensuring that the material is uniformly exposed to hot air from all directions. This avoids problems such as uneven heating, clumping, and incomplete drying caused by material accumulation, guaranteeing the drying quality of pharmaceutical materials and preventing the destruction of active ingredients.

Description

Technical Field

[0001] This invention relates to the field of pharmaceutical drying technology, and in particular to a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization. Background Technology

[0002] In the pharmaceutical industry, drying pharmaceutical materials is a key step in the production process, directly affecting the purity and stability of drug products.

[0003] Currently, most existing pharmaceutical drying equipment only has a single drying function and lacks a matching automatic lifting function. After drying, pharmaceutical materials need to be quickly transferred to the next processing step. Without an automatic lifting function, the dried materials must be manually removed from the drying chamber and transferred, which not only significantly increases the labor intensity of operators and reduces production efficiency, but also easily causes material contamination during the transfer process, failing to meet the strict requirements of clean production in the pharmaceutical industry. At the same time, during the drying process of existing equipment, the materials are always in a static state. Static materials tend to accumulate in the material placement area, resulting in uneven heating. Materials near the hot air source are prone to over-drying and damage to the active ingredients, while materials far from the hot air source are not dried thoroughly, resulting in clumping and excessive moisture content, seriously affecting the quality of drug products and failing to meet the core requirement of uniform drying of pharmaceutical materials. Summary of the Invention

[0004] This invention provides a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization, which solves the technical problems of existing pharmaceutical drying equipment lacking an automatic feeding and lifting structure and uneven drying caused by static drying of materials.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization, comprising a body, a lifting cylinder, and a second waste gas guiding channel;

[0006] An exhaust gas power transmission component is disposed between the lifting cylinder and the second exhaust gas guide channel, and is used to realize pure mechanical power reversal and linkage conveying by relying on the exhaust gas flow.

[0007] The pneumatic reciprocating lifting component is located inside the machine body and is used to lift and loosen the material through a closed pneumatic transmission, thereby improving the uniformity of drying.

[0008] The exhaust gas power transmission assembly includes a fixed plate, a rotating shaft, turbine blades, a first bevel gear, a second bevel gear, a transmission shaft, and a cam;

[0009] The fixed plate is fixedly disposed on the inner wall of the second exhaust gas guide channel. One end of the rotating shaft is disposed on one end of the fixed plate through a bearing. The turbine blade is fixedly disposed on the end of the rotating shaft away from the fixed plate. The first bevel gear is fixedly sleeved on the outer surface of the rotating shaft. The second bevel gear is fixedly sleeved on the outer surface of the transmission shaft. The first bevel gear and the second bevel gear mesh with each other. The cam is fixedly disposed at the bottom end of the transmission shaft.

[0010] As a further improvement of the present invention: the exhaust gas power transmission assembly further includes a base plate, a spiral lifting blade and a discharge pipe; the base plate is fixedly embedded in the inner wall of the lifting cylinder, the bottom end of the transmission shaft is rotatably set with the base plate through a bearing, the spiral lifting blade is fixedly sleeved on the outer surface of the transmission shaft and rotates synchronously with the transmission shaft to realize material lifting, and the discharge pipe is installed on the outer surface of the lifting cylinder.

[0011] As a further improvement of the present invention: the pneumatic reciprocating lifting assembly includes a cylinder, a piston plate, a connecting rod, an air guide pipe, a diverter pipe, two connecting pipes, and multiple cylinders; the cylinder is fixedly disposed on the side of the machine body near the lifting cylinder, the piston plate is movably embedded in the inner wall of the cylinder, one end of the connecting rod is hinged to the piston plate, and the other end is hinged to the cam, the multiple cylinders are arranged in pairs, the two sets of cylinders are respectively connected to the two ends of the two connecting pipes, one end of the air guide pipe is connected to the cylinder, and the other end is connected to the diverter pipe, and the diverter pipe is connected to the two connecting pipes.

[0012] As a further improvement of the present invention: the pneumatic reciprocating lifting assembly further includes multiple push plates and multiple push rods; the multiple push plates are respectively movably embedded in the inner wall of multiple cylinders, and one end of each of the multiple push rods is fixedly connected to one side of the multiple push plates.

[0013] As a further improvement of the present invention: a connecting seat is fixedly provided at the end of each of the plurality of push rods away from the push plate, a top rod is hinged to one side of each of the plurality of connecting seats, a spring is provided inside each of the plurality of cylinders, one end of each of the plurality of springs is fixedly connected to one side of each of the plurality of push plates, and the other end abuts against one side of the inner wall of each of the plurality of cylinders.

[0014] As a further improvement of the present invention: a closable door is provided on one side of the machine body, a hot air box is fixedly installed on the left side of the machine body, and a first exhaust gas guide channel is connected to the upper side of the machine body.

[0015] As a further improvement of the present invention: the plurality of push rods are grouped in pairs, and one end of each pair of push rods is hinged to a sliding groove plate, and the inner walls of the two sliding groove plates are slidably provided with sliders.

[0016] As a further improvement of the present invention: a material placement plate is fixedly provided on the top of the two sliders, and the material placement plate is movably embedded in the inner wall of the machine body.

[0017] As a further improvement of the present invention: a partition plate is fixedly installed on the side of the machine body near the lifting cylinder, and material passage gaps are reserved between the upper and lower ends of the partition plate and the inner wall of the machine body for the purpose of realizing automatic screening of dry and wet materials.

[0018] As a further improvement of the present invention: a baffle box is fixedly installed on the side of the machine body near the partition plate, and a guide plate is inclinedly installed at the bottom of the baffle box to guide the screened dried material into the lifting cylinder. One side of the baffle box is fixedly installed on the outer surface of the lifting cylinder.

[0019] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0020] This invention integrates drying and automatic lifting functions. A waste gas power transmission component drives the spiral lifting blades, enabling automatic lifting and unloading of dried materials. This eliminates the need for manual transfer, reducing operator workload, increasing production efficiency, and preventing material contamination during transport, thus meeting the clean production requirements of the pharmaceutical industry. Simultaneously, a pneumatic reciprocating lifting component drives the periodic lifting and lowering of the material placement plate, continuously agitating the material during drying. This overcomes the limitations of static drying in existing equipment, ensuring uniform contact of the material with hot air from all directions. It avoids uneven heating, clumping, and incomplete drying caused by material accumulation, guaranteeing the drying quality of pharmaceutical materials and preventing the destruction of active ingredients. Furthermore, the device utilizes waste gas flow as a power source, eliminating the need for additional motors or other power components, thus reducing energy consumption. Attached Figure Description

[0021] Figure 1 This invention presents a schematic diagram of the overall three-dimensional structure of a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization.

[0022] Figure 2 This invention presents a side perspective view of a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization.

[0023] Figure 3 This is a cross-sectional view of the body in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram of the internal structure of the lifting cylinder in an embodiment of this application.

[0025] Figure 5 This is a cross-sectional view of the baffle box in an embodiment of this application.

[0026] Figure 6This is a schematic diagram of the material placement plate in an embodiment of this application.

[0027] Figure 7 This is a cross-sectional view of the cylinder in an embodiment of this application.

[0028] Figure 8 This is a cross-sectional view of the cylinder in an embodiment of this application.

[0029] Figure 9 This is a cross-sectional view of the second exhaust gas guiding channel in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Machine body; 101. Door; 102. Hot air box; 103. First exhaust gas guide channel; 104. Fan; 105. Second exhaust gas guide channel; 2. Material placement plate; 201. Sliding block; 202. Slide plate; 204. Cylinder; 205. Push plate; 206. Push rod; 207. Connecting seat; 208. Top rod; 209. Spring; 210. Cylinder; 211. Piston plate; 2 12. Connecting rod; 213. Cam; 214. Air guide pipe; 215. Diverter pipe; 216. Connecting pipe; 3. Fixed plate; 301. Rotating shaft; 302. Turbine blade; 4. Lifting cylinder; 401. Base plate; 402. Drive shaft; 403. Spiral lifting blade; 404. First bevel gear; 405. Second bevel gear; 406. Discharge pipe; 407. Divider plate; 408. Baffle box; 409. Guide plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1 to 9This embodiment provides a pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization, including a body 1, a lifting cylinder 4, and a second waste gas guiding channel 105; a waste gas power transmission component, disposed between the lifting cylinder 4 and the second waste gas guiding channel 105, for achieving pure mechanical power reversal and linkage conveying based on waste gas flow; a pneumatic reciprocating lifting component, disposed inside the body 1, for achieving material lifting and loosening through closed pneumatic transmission, improving drying uniformity; the waste gas power transmission component includes a fixed plate 3, a rotating shaft 301, a turbine blade 302, and a first bevel gear 4. 04. Second bevel gear 405, drive shaft 402 and cam 213; fixed plate 3 is fixedly installed on the inner wall of the second exhaust gas guide channel 105, one end of the rotating shaft 301 is installed on one end of the fixed plate 3 through a bearing, turbine blade 302 is fixedly installed on the end of the rotating shaft 301 away from the fixed plate 3, first bevel gear 404 is fixedly sleeved on the outer surface of the rotating shaft 301, second bevel gear 405 is fixedly sleeved on the outer surface of the drive shaft 402, the first bevel gear 404 and the second bevel gear 405 mesh with each other, and cam 213 is fixedly installed at the bottom end of the drive shaft 402.

[0033] During use, the operator opens the hopper door 101 of the machine body 1, places the material to be dried on the upper surface of the material placement plate 2, closes the hopper door 101 after placement, turns on the switch of the hot air box 102, and the hot air box 102 outputs drying hot air horizontally to continuously blow and dry the material placed on the material placement plate 2 horizontally; at the same time, the blower 104 is started, and the hot and humid gas inside the machine body 1 flows in a direction through the first waste gas guide channel 103 and the second waste gas guide channel 105. The airflow impact force drives the waste gas power transmission component to operate, which in turn drives the air pressure reciprocating lifting component to move, realizing the linkage operation of material drying and lifting.

[0034] Please see Figures 1 to 9 In one embodiment, the exhaust gas power transmission assembly further includes a base plate 401, a spiral lifting blade 403, and a discharge pipe 406; the base plate 401 is fixedly embedded in the inner wall of the lifting cylinder 4, the bottom end of the transmission shaft 402 is rotatably set with the base plate 401 through a bearing, the spiral lifting blade 403 is fixedly sleeved on the outer surface of the transmission shaft 402, and rotates synchronously with the transmission shaft 402 to realize material lifting, and the discharge pipe 406 is installed on the outer surface of the lifting cylinder 4.

[0035] Specifically, the base plate 401 provides stable support for the drive shaft 402, bearing the weight of the drive shaft 402, the spiral lifting blades 403, and the material to be lifted. The first bevel gear 404 and the second bevel gear 405 are meshed, with a gear ratio of 1:1.5, which effectively amplifies the torque transmitted by the rotating shaft 301. This satisfies the load requirements of the drive shaft 402 driving the spiral lifting blades 403 to lift the material and the cam 213 driving the piston plate 211 to reciprocate. At the same time, it ensures smooth transmission and avoids jamming or skipping, achieving efficient reversal and transmission of power. The spiral lifting blades 403 convert the rotational torque of the drive shaft 402 into a vertical lifting force for the material. The discharge pipe 406 is installed obliquely on the outside of the lifting cylinder 4. Utilizing the synergistic effect of the material's own gravity and the spiral lifting force, it guides the dried material to be discharged smoothly, preventing material accumulation at the discharge port and facilitating connection with the equipment in the next process.

[0036] Please see Figures 1 to 9 In one embodiment, the pneumatic reciprocating lifting assembly includes a cylinder 210, a piston plate 211, a connecting rod 212, an air guide pipe 214, a diverter pipe 215, two connecting pipes 216, and multiple cylinders 204. The cylinder 210 is fixedly disposed on the side of the machine body 1 near the lifting cylinder 4. The piston plate 211 is movably embedded in the inner wall of the cylinder 210. One end of the connecting rod 212 is hinged to the piston plate 211, and the other end is hinged to the cam 213. The multiple cylinders 204 are arranged in pairs, and the two sets of cylinders 204 are respectively connected to the two ends of the two connecting pipes 216. One end of the air guide pipe 214 is connected to the cylinder 210, and the other end is connected to the diverter pipe 215. The diverter pipe 215 is connected to the two connecting pipes 216.

[0037] Furthermore, the pneumatic reciprocating lifting assembly also includes multiple push plates 205 and multiple push rods 206; the multiple push plates 205 are respectively movably embedded in the inner wall of multiple cylinders 204, and one end of the multiple push rods 206 is respectively fixedly connected to one side of the multiple push plates 205.

[0038] Specifically, when the cam 213 rotates synchronously with the transmission shaft 402, its eccentric structure generates a periodic circumferential force, which is converted into a linear reciprocating force of the piston plate 211 through the connecting rod 212. Since the connecting rod 212 is hinged to the cam 213 and the piston plate 211, it can flexibly adapt to the direction conversion between the circumferential motion of the cam 213 and the linear motion of the piston plate 211, ensuring stable force transmission. When the high-pressure gas enters the cylinder 204, the pressure difference between the inside and outside of the cylinder 204 generates a thrust, which pushes the push plate 205 to move linearly along the axial direction of the cylinder 204, and completely transmits the air pressure thrust received by the push plate 205 to the connecting seat 207.

[0039] Please see Figures 1 to 9In one embodiment, a connecting seat 207 is fixedly provided at the end of a plurality of push rods 206 away from the push plate 205, and a push rod 208 is hinged to one side of each of the plurality of connecting seats 207. A spring 209 is provided inside each of the plurality of cylinders 204, and one end of each of the plurality of springs 209 is fixedly connected to one side of the plurality of push plates 205, and the other end abuts against one side of the inner wall of the plurality of cylinders 204.

[0040] Furthermore, a closable door 101 is provided on one side of the body 1, a hot air box 102 is fixedly installed on the left side of the body 1, and a first exhaust gas guide channel 103 is connected to the upper side of the body 1.

[0041] Specifically, the connecting seat 207 acts as a force transfer and direction conversion mechanism, converting the horizontal thrust transmitted by the push rod 206 into the vertical lifting force of the push rod 208. The spring 209 is a compression spring, which is in a slightly compressed state under normal conditions. On the one hand, it can abut against the push plate 205 to ensure that the push plate 205 is in the initial working position. On the other hand, when the internal air pressure of the cylinder 204 is reduced, the spring 209 releases elastic potential energy to generate a reverse thrust, which quickly pushes the push plate 205 and push rod 206 to reset. At the same time, it plays a buffering role, reducing the impact and wear between the push plate 205 and the inner wall of the cylinder 204. The drying hot air output by the hot air box 102 is controlled at a temperature of 40-60℃ and a wind speed of 2-3m / s, which is suitable for the low-temperature drying requirements of pharmaceutical materials and avoids high temperature damage to the effective components of the materials. The horizontal air outlet can make the hot air evenly cover the materials on the material plate 2, improving the drying uniformity.

[0042] Please see Figures 1 to 9 In one embodiment, multiple push rods 208 are arranged in pairs, and one end of each pair of push rods 208 is hinged to a slide plate 202. A slider 201 is slidably arranged on the inner wall of the two slide plates 202. A material placement plate 2 is fixedly arranged on the top of the two sliders 201. The material placement plate 2 is movably embedded in the inner wall of the machine body 1. The two sets of push rods 208 are symmetrically arranged in pairs, so that the vertical lifting force transmitted by the push rods 208 is transmitted to the slide plate 202. The slider 201 can move up and down synchronously with the slide plate 202. The material placement plate 2 is movably embedded in the inner wall of the machine body 1. On the one hand, it plays a limiting and guiding role for the material placement plate 2 to prevent lateral deviation during its lifting and lowering process. On the other hand, it provides convenience for the subsequent operator to pull the material placement plate 2 to clean up residual material and add new material.

[0043] Please see Figures 1 to 9In one embodiment, a partition plate 407 is fixedly installed on the side of the machine body 1 near the lifting cylinder 4. Material passage gaps are reserved between the upper and lower ends of the partition plate 407 and the inner wall of the machine body 1 to realize automatic screening of dry and wet materials. The partition plate 407 is vertically fixed at the junction of the machine body 1 and the lifting cylinder 4, playing the core role of blocking the screening of dry and wet materials. The material passage gaps reserved between its upper and lower ends and the inner wall of the machine body 1 are adapted to the particle size of the loose material after drying, ensuring that the loose material after drying and meeting the requirements can pass smoothly through the gaps into the subsequent feeding and lifting process. The undried and clump-forming material is blocked by the partition plate 407 in the drying area of ​​the machine body 1 due to its large particle size, and continues to be swept by hot air laterally until it is dried and loose before passing through the gaps, thus realizing automatic screening of dry and wet materials without manual sorting.

[0044] Please see Figures 1 to 9 In one embodiment, a baffle box 408 is fixedly installed on the side of the machine body 1 near the partition plate 407. A guide plate 409 is inclinedly installed at the bottom of the baffle box 408 to guide the screened dry material into the lifting cylinder 4. One side of the baffle box 408 is fixedly installed on the outer surface of the lifting cylinder 4. The inner side of the baffle box 408 corresponds to the partition plate 407 and plays the role of limiting and blocking the material. It can effectively prevent the dry material from splashing when it falls from the gap of the partition plate 407, ensuring that all the material falls into the baffle box 408, avoiding material waste and material accumulation inside the equipment. The guide plate 409 adopts an inclination angle of 30°-45°. Utilizing the material's own gravity and the guiding effect of the guide plate 409, the dry material is guided to slide smoothly into the lifting cylinder 4 along the surface of the guide plate 409, realizing a seamless connection between the screening, guiding and lifting processes.

[0045] Working principle: When in use, the operator opens the door 101 of the machine body 1, places the material to be dried on the upper surface of the material plate 2, closes the door 101 after placement, turns on the switch of the hot air box 102, and the hot air box 102 outputs drying hot air horizontally to continuously blow and dry the material placed on the material plate 2 horizontally.

[0046] When the fan 104 is started synchronously, the hot and humid gas inside the machine body 1 flows in a directional manner through the first exhaust gas guide channel 103 and the second exhaust gas guide channel 105. The inner wall of the second exhaust gas guide channel 105 is fixed with a fixing plate 3. The fixing plate 3 is mounted on the rotating shaft 301 through the bearing. The flowing air continuously impacts the turbine blades 302 to rotate, which further drives the rotating shaft 301 to rotate. The rotating shaft 301 drives the first bevel gear 404 to rotate synchronously. The first bevel gear 404 and the second bevel gear 405 mesh with each other and drive each other. Then the first bevel gear 404 drives the second bevel gear 405 to rotate. The second bevel gear 405 is connected to the transmission shaft 402. Furthermore, the second bevel gear 405 drives the transmission shaft 402 to rotate vertically. The synchronous transmission shaft 402 synchronously drives the outer spiral lifting blades 403 and the cam 213 fixed at the lower end to rotate together.

[0047] During the rotation of cam 213, piston plate 211 is pulled by connecting rod 212 to slide back and forth on the inner wall of cylinder 210. The reciprocating motion of piston plate 211 realizes the intake and compression of gas in the inner cavity of the cylinder. The compressed gas flows through guide pipe 214 into distribution pipe 215, and is then distributed by distribution pipe 215 to two connecting pipes 216. High-pressure gas enters the cylinder 204 and pushes push plate 205 to move linearly. Push plate 205 drives push rod 206 to move synchronously. Connecting seat 207 fixed at the end of push rod 206 moves accordingly. Push rod 208 hinged to connecting seat 207 synchronously completes the pushing action, further... The two sliding plates 202 drive the two sliders 201 to move, thereby raising the entire material plate 2, which fully loosens and turns the material on the surface of the material plate 2, increases the contact area with the horizontal hot air, and effectively improves the drying uniformity and drying efficiency. The spring 209 installed inside the cylinder 204 normally abuts against the push plate 205 and the inner wall of the cylinder 204. When the air pressure is reduced, the spring 209 elastically resets, pushing the push plate 205 and push rod 206 to reset in the opposite direction, causing the top rod 208, sliding plate 202 and material plate 2 to fall back. This cycle repeats to realize the periodic lifting and disturbing operation of the material plate 2.

[0048] After being continuously dried by hot air, the material is loose and can pass through the passage gaps reserved at the top and bottom ends of the partition plate 407 and the inner wall of the machine body 1. The partition plate 407 can block the lumpy material that is not completely dried, realizing automatic screening of dry and wet materials. The dried material falls into the baffle box 408 area. The baffle box 408 is fixed between the machine body 1 and the lifting cylinder 4. The guide plate 409 at the bottom of the baffle box 408 guides and gathers the material, so that the dried material is smoothly introduced into the lifting cylinder 4. The spiral lifting blades 403 that rotate continuously inside the lifting cylinder 4 vertically lift and convey the falling material. Finally, the material is discharged to the next process through the discharge pipe 406 installed on the outside of the lifting cylinder 4. After a batch of material is processed, the residual material on the top can be processed and new material can be added at the same time by opening the hopper door 101 of the machine body 1 and pulling the material plate 2.

[0049] In summary, this device relies on the exhaust gas power transmission component to achieve airflow-driven pure mechanical linkage, without the need for additional electric drive for lifting and conveying structures. It works in conjunction with the pneumatic reciprocating lifting component to achieve dynamic disturbance of materials. Combined with the screening and guiding structure of the partition plate 407, baffle box 408 and guide plate 409, it completes the entire process of material drying in hot air, mechanical linkage lifting, dry and wet screening, and automatic lifting and discharge, which is suitable for the drying and processing needs of pharmaceutical materials.

[0050] The above-mentioned models are all commercially available products in the prior art. This application is only used as an example of an embodiment and does not limit the use of other equivalent models.

[0051] All standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0052] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization, characterized in that: Includes the body (1), the lifting cylinder (4), and the second exhaust gas guide channel (105); The exhaust gas power transmission component is located between the lifting cylinder (4) and the second exhaust gas guide channel (105) and is used to realize pure mechanical power reversal and linkage conveying by relying on the exhaust gas flow. The pneumatic reciprocating lifting component is installed inside the machine body (1) and is used to lift and loosen the material through a closed pneumatic transmission to improve the uniformity of drying. The exhaust gas power transmission assembly includes a fixed plate (3), a rotating shaft (301), turbine blades (302), a first bevel gear (404), a second bevel gear (405), a transmission shaft (402), and a cam (213). The fixed plate (3) is fixedly disposed on the inner wall of the second exhaust gas guide channel (105). One end of the rotating shaft (301) is disposed on one end of the fixed plate (3) through a bearing. The turbine blade (302) is fixedly disposed on the end of the rotating shaft (301) away from the fixed plate (3). The first bevel gear (404) is fixedly sleeved on the outer surface of the rotating shaft (301). The second bevel gear (405) is fixedly sleeved on the outer surface of the transmission shaft (402). The first bevel gear (404) and the second bevel gear (405) mesh with each other. The cam (213) is fixedly disposed at the bottom end of the transmission shaft (402).

2. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 1, characterized in that: The exhaust gas power transmission assembly also includes a base plate (401), a spiral lifting blade (403), and a discharge pipe (406). The base plate (401) is fixedly embedded in the inner wall of the lifting cylinder (4). The bottom end of the drive shaft (402) is rotatably set with the base plate (401) through a bearing. The spiral lifting blade (403) is fixedly sleeved on the outer surface of the drive shaft (402) and rotates synchronously with the drive shaft (402) to realize material lifting. The discharge pipe (406) is installed on the outer surface of the lifting cylinder (4).

3. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 1, characterized in that: The pneumatic reciprocating lifting assembly includes a cylinder (210), a piston plate (211), a connecting rod (212), an air guide pipe (214), a splitter pipe (215), two connecting pipes (216), and multiple cylinders (204). The cylinder (210) is fixedly installed on the side of the machine body (1) near the lifting cylinder (4). The piston plate (211) is movably embedded in the inner wall of the cylinder (210). One end of the connecting rod (212) is hinged to the piston plate (211), and the other end is hinged to the cam (213). Multiple cylinders (204) are arranged in pairs. The two sets of cylinders (204) are respectively connected to the two ends of two connecting pipes (216). One end of the air guide pipe (214) is connected to the cylinder (210), and the other end is connected to the diverter pipe (215). The diverter pipe (215) is connected to the two connecting pipes (216).

4. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 3, characterized in that: The pneumatic reciprocating lifting assembly also includes multiple push plates (205) and multiple push rods (206). Multiple push plates (205) are movably embedded in the inner walls of multiple cylinders (204), and one end of multiple push rods (206) is fixedly connected to one side of multiple push plates (205).

5. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 4, characterized in that: Each of the multiple push rods (206) has a connecting seat (207) fixedly installed at one end away from the push plate (205). Each of the multiple connecting seats (207) has a push rod (208) hinged to one side. Each of the multiple cylinders (204) has a spring (209) installed inside. One end of each of the multiple springs (209) is fixedly connected to one side of each of the multiple push plates (205), and the other end abuts against one side of the inner wall of each of the multiple cylinders (204).

6. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 5, characterized in that: The machine body (1) has an openable door (101) on one side, a hot air box (102) is fixedly installed on the left side of the machine body (1), and a first exhaust gas guide channel (103) is connected to the upper side of the machine body (1).

7. A pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 6, characterized in that: Multiple top rods (208) are arranged in pairs, and one end of each pair of top rods (208) is hinged to a sliding plate (202). The inner walls of the two sliding plates (202) are slidably provided with sliders (201).

8. The pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 7, characterized in that: The top of the two sliders (201) is fixedly provided with a material plate (2), which is movably embedded in the inner wall of the machine body (1).

9. A pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 8, characterized in that: A partition plate (407) is fixedly installed on the side of the machine body (1) near the lifting cylinder (4). Material passage gaps are reserved between the upper and lower ends of the partition plate (407) and the inner wall of the machine body (1) to realize automatic screening of dry and wet materials.

10. A pharmaceutical drying and automatic lifting mixing device based on negative pressure fluidization according to claim 9, characterized in that: A baffle (408) is fixedly installed on the side of the machine body (1) near the partition plate (407). A guide plate (409) is inclinedly installed at the bottom of the baffle (408) to guide the sieved dried material into the lifting cylinder (4). One side of the baffle (408) is fixedly installed on the outer surface of the lifting cylinder (4).

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