CN220489651U

CN220489651U - Low-temperature drying device for medicine production

Info

Publication number: CN220489651U
Application number: CN202420083508.1U
Authority: CN
Inventors: 罗斌; 焦国文
Original assignee: Inner Mongolia Zhongmu Biological Pharmaceutical Co ltd
Current assignee: Inner Mongolia Zhongmu Biological Pharmaceutical Co ltd
Priority date: 2024-01-15
Filing date: 2024-01-15
Publication date: 2024-02-13
Anticipated expiration: 2034-01-15

Abstract

The utility model provides a low-temperature drying device for drug production, which relates to the field of pharmaceutical processing instruments and comprises: a shell with a discharge hole at the bottom; a temperature control cavity is formed in the outer side wall of the shell in a surrounding manner; the middle part of the shell is horizontally provided with a turning plate which is rotationally connected with the inner wall of the shell through a rotating rod; an electric push rod is arranged at the top of the shell, and the output end of the electric push rod is connected with the side wall of the turning plate through a universal connecting shaft; the top of the shell is provided with a feed inlet and an air inlet; the air outlet is arranged on the side wall of the shell below the turning plate; a drying cylinder is arranged in the shell; the motor is arranged on the outer side of the bottom of the shell, and the output end of the motor is connected with a rotating shaft penetrating through the bottom walls of the shell and the drying cylinder. The low-temperature drying device utilizes the rotatable turning plate and the drying cylinder to drive the medicine powder to be dispersed and moved continuously, and performs sectional drying of a high-temperature section and a low-temperature section, thereby improving the drying efficiency and the drying effect of the medicine powder.

Description

Low-temperature drying device for medicine production

Technical Field

The utility model relates to the field of pharmaceutical processing instruments, in particular to a low-temperature drying device for drug production.

Background

In the field of pharmaceutical manufacturing, in the process of processing and producing medicines, various raw materials, intermediates or products often need to be dried so as to facilitate subsequent operations such as crushing, grinding, preservation and the like. In the existing drying process, devices such as an oven, a hot air blower and the like are generally adopted to dry the waste water. However, in the actual drying process of a large quantity of medicines, wet medicine powder is generally directly placed on a vessel such as a partition plate for drying, the wet medicine powder is not easy to disperse and turn over in the drying process, the wet medicine powder is piled up together to generate agglomeration, the medicines are easy to be heated unevenly, the drying efficiency of the medicine powder is very low, heat cannot reach the inside of piled medicines, the medicine powder in the agglomeration is not effectively dried, the drying effect of the medicine powder is relatively poor, the drying and production speed of the medicines are slow, and the drying quality and the processing efficiency are affected. Moreover, some temperature sensitive drugs cannot be dried or stored at high temperatures, and higher temperatures can affect their properties, resulting in reduced efficacy and quality of the drug. Thus, there is a need for a low temperature drying apparatus that can be used in the manufacture of medicaments and that is suitable for medicaments that cannot be dried at high temperatures.

Disclosure of Invention

The utility model provides a low-temperature drying device for drug production, which is used for solving the problems that the existing device is not easy to disperse and turn over, the drugs are easy to agglomerate and are heated unevenly, so that the drying efficiency is low, the drying quality is poor, and the existing device is often dried at high temperature and is not suitable for temperature-sensitive drugs.

The utility model provides a low-temperature drying device for drug production, comprising: the bottom of the shell is obliquely arranged, and a discharge hole is formed in the lower end of the oblique shell; the outer side wall of the shell is provided with a temperature control cavity in a surrounding way; the top of the temperature control cavity is provided with a medium outlet, and the bottom of the temperature control cavity is provided with a medium inlet; two turning plates with through holes are horizontally arranged in the middle of the shell, the two turning plates are symmetrically arranged, and each turning plate is rotationally connected with the inner wall of the shell in the horizontal direction through a rotating rod arranged below the turning plates; an electric push rod is arranged in the center of the top of the shell, and the output end of the electric push rod penetrates through the top of the shell and is connected with the side walls of the two turning plates through universal connecting shafts respectively; two feed inlets are formed in the tops of the shells corresponding to the central positions of the two turning plates; an air inlet is also formed in one side of the top of the shell; an air outlet is arranged on the side wall of the shell far away from the air inlet, and the air outlet is arranged below the turning plate.

Optionally, an open drying cylinder is arranged in the shell below the air outlet, a plurality of material passing holes are uniformly distributed on the side wall and the bottom wall of the drying cylinder, a plurality of positioning sliding blocks are arranged on the upper part of the outer wall of the drying cylinder, an annular strip is horizontally fixed on the inner wall of the shell, an annular sliding groove is formed in the inner side wall of the annular strip, and the positioning sliding blocks are in sliding connection with the inner wall of the annular sliding groove; the central point outside the bottom of the shell is provided with a motor, the output end of the motor is connected with a rotating shaft, and the rotating shaft penetrates through the bottom walls of the shell and the drying cylinder and extends into the cylinder body of the drying cylinder.

Optionally, a scattering shaft is further arranged in the drying cylinder, extends along the axial direction of the rotating shaft and is far away from the air outlet; a plurality of stirring teeth are arranged on the scattering shaft at intervals; the rotary shaft is fixedly connected with a driving gear, the lower part of the scattering shaft is fixedly connected with a driven gear, and the driven gear is meshed with the driving gear.

Optionally, the diameter of the through hole on the turning plate is larger than the diameter of the material passing hole on the drying cylinder.

Optionally, a grating plate is arranged in the shell at the air outlet.

Optionally, the air outlet is connected with an external air pump inlet through an air extraction pipe, and an outlet of the air pump is connected with the waste gas recovery unit.

Optionally, a detachable filter screen is arranged between the air outlet and the exhaust pipe, and the mesh diameter of the filter screen is smaller than that of the grating plate.

Optionally, a filter is installed on the exhaust pipe, and the filter is filled with an adsorbent.

Optionally, a low-temperature air return port is arranged on the side wall of the lower part of the shell, and is positioned below the drying cylinder; the low-temperature gas return port is connected with the outlet of the air pump through a return air pipe.

Optionally, a drying box is arranged on the reflux air pipe, and a drying agent is filled in the drying box.

Optionally, a temperature sensor, a pressure sensor and a humidity sensor are also arranged in the shell.

The low-temperature drying device for producing the medicine has the advantages of simple and reasonable structure and good drying effect, realizes sectional drying of a high-temperature section and a low-temperature section of the medicine, avoids the condition that medicine powder is damaged due to overhigh temperature, has good drying effect, further ensures the quality of the medicine, and utilizes a low-temperature heat source to dry, and also performs reflux utilization on high-temperature gas for the high-temperature section, thereby having high heat utilization rate and effectively reducing energy consumption.

This low temperature drying device has adopted the dry structure of interlayer heating, utilizes rotatable board and the dry section of thick bamboo of turning over to drive the medicine powder and constantly disperses and remove, breaks up axle and stirring tooth and is used for breaking up the medicine powder, has realized the quick drying to the medicine powder, has solved the problem that the medicine powder can not thoroughly be dried because of the medicine powder caking, has improved drying efficiency and drying effect to the medicine powder.

The low-temperature drying device is also suitable for drying heat-sensitive materials which are easy to decompose, polymerize and deteriorate at high temperature, can be used for drying insects, drying traditional Chinese medicinal materials, recycling organic solvents and the like, has stable discharging quality, adopts a closed system, does not raise dust, eliminates the emission of no tissues and has wide application range.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a low-temperature drying device for producing a drug according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the direction A-A of FIG. 1;

fig. 3 is a schematic structural diagram of a low-temperature drying device for producing a drug according to another embodiment of the present utility model.

Reference numerals illustrate:

the device comprises a shell, a temperature control cavity, a discharge port 11, a feed port 12, a scattering shaft 13, an air inlet 14, an air outlet 15, a grid plate 16, a filter screen 17, a low-temperature air return port 21, a medium outlet 22, a medium inlet 31, a turnover plate 32, a rotating rod 33, an electric push rod 34, a universal connecting shaft 41, a drying cylinder 42, a positioning slide block 43, an annular strip 44, a motor 45, a rotating shaft 46, a scattering shaft 47, stirring teeth 48, a driving gear 49, a driven gear 51, an air pump 52, a filter 53 and a drying box 53.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions in the embodiments of the present utility model will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are also within the scope of the utility model.

As shown in fig. 1, the present utility model provides a low-temperature drying apparatus for pharmaceutical production, comprising: the bottom of the shell 1 is obliquely arranged, and a discharge hole 11 is formed in the lower end of the inclination; the outer side wall of the shell 1 is provided with a temperature control cavity 2 in a surrounding way; the top of the temperature control cavity 2 is provided with a medium outlet 21, and the bottom is provided with a medium inlet 22. The medium in the temperature control cavity 2 can be filled with low-temperature steam or low-temperature water according to production requirements, the temperature control cavity 2 enables the low-temperature drying device to form a structure of interlayer heating and drying, the wet medicine in the shell 1 is dried by the medium in the temperature control cavity 2, low-temperature drying can be achieved, damage to medicine powder caused by overhigh temperature can be avoided, and further quality of finished products of medicines (particularly temperature sensitive medicines) is guaranteed.

As shown in fig. 1 and 2, alternatively, two turning plates 31 with through holes are horizontally arranged in the middle of the shell 1, the two turning plates 31 are symmetrically arranged, and each turning plate 31 is rotationally connected with the inner wall of the shell 1 in the horizontal direction through a rotating rod 32 arranged below the turning plates 31; an electric push rod 33 is arranged in the center of the top of the shell 1, and the output end of the electric push rod 33 penetrates through the top of the shell 1 and is connected with the side walls of the two turning plates 31 through universal connecting shafts 34 respectively; two feed inlets 12 are formed in the top of the shell 1 corresponding to the center positions of the two turning plates 31; an air inlet 13 is also formed in one side of the top of the shell 1; an air outlet 14 is arranged on the side wall of the shell 1 far away from the air inlet 13, and the air outlet 14 is arranged below the turning plate 31.

The feed inlet 12 is used for delivering medicine powder to the corresponding turning plate 31, and the air inlet 13 is filled with dry air with a temperature slightly higher than that of the medium in the temperature control cavity 2, and the dry air belongs to high-temperature air in the utility model, for example, the temperature of the high-temperature air is higher than that of the medium in the temperature control cavity 2 by 5-10 ℃, but the temperature sensitivity limit of the medicine is not exceeded. The high-temperature gas can be in direct contact with the medicine, and the gas flow rate is relatively high, so that the drying speed is increased, and the drying at a high temperature section is realized.

When feeding, the output end position of the electric push rod 33 should ensure that the turnover plate 31 is in a horizontal state, and in the drying process, the output end of the electric push rod 33 can be displaced up and down to drive the turnover plate 31 to incline and rotate to different degrees, so that medicines on the turnover plate 31 are turned over along with the turnover plate so as not to be easy to agglomerate and agglomerate, the contact area of the medicines and high-temperature gas is increased in the medicine turning process, the water evaporation speed is accelerated, and meanwhile, the medicines can fall through inclined positions or through holes on the turnover plate 31.

It should be noted that the shape of the turning plate 31 is not limited herein, and may be a square plate or an arc plate, but the length of the square plate or the length of the straight edge of the arc plate should be smaller than the inner diameter of the drying cylinder 41, so as to ensure that the medicine can fall into the drying cylinder 41 as completely as possible through the gap between the two turning plates 31 for low-temperature section drying, so as to improve the drying effect.

As shown in fig. 1, optionally, an open drying cylinder 41 is arranged in the casing 1 below the air outlet 14, a plurality of material passing holes are uniformly distributed on the side wall and the bottom wall of the drying cylinder 41, a plurality of positioning sliding blocks 42 are arranged on the upper part of the outer wall of the drying cylinder 41, an annular strip 43 is horizontally fixed on the inner wall of the casing 1, an annular chute is formed on the inner side wall of the annular strip 43, and the positioning sliding blocks 42 are in sliding connection with the inner wall of the annular chute; the motor 44 is arranged in the center position outside the bottom of the shell 1, the output end of the motor 44 is connected with the rotating shaft 45, and the rotating shaft 45 penetrates through the shell 1 and the bottom wall of the drying cylinder 41 and extends into the cylinder body of the drying cylinder 41.

The material passing holes can be used for air flow and medicine passing. The rotating shaft 45 is rotationally connected with the shell 1 and is fixedly connected with the drying cylinder 41, so that the drying cylinder 41 can be driven to rotate, the drying cylinder 41 is supported by matching the annular sliding groove with the positioning sliding block 42, the drying cylinder 41 can be prevented from shaking, and the stability of the drying cylinder is improved. At this time, after the medicine is dried in the high temperature section, the moisture in the medicine is reduced, and the drying in the low temperature section is mainly performed by the temperature of the temperature control cavity 2 in the drying cylinder 41, so that the damage to the medicine quality caused by long-time high temperature can be effectively prevented. The rotary shaft 45 drives the drying cylinder 41 and the medicine to rotate, so that the medicine powder centrifugally moves, and under the action of centrifugal force, the medicine powder is thrown onto the inner wall of the shell 1 through the passing hole, directly contacts with the inner wall of the temperature control cavity 2 and exchanges heat, continuous dispersion of the medicine and drying at a low temperature section are realized, the medicine on the inner walls of the drying cylinder 41 and the shell 1 is finally collected to the bottom of the shell 1 after being dried, and the medicine is discharged from the discharge hole 11.

Compared with the standing drying mode adopted in the existing drying device, the low-temperature drying device utilizes the rotatable turning plate 31 and the drying cylinder 41 to drive the medicine powder to be continuously dispersed and moved, so that the medicine powder is quickly dried, the medicine is further subjected to sectional drying at a high temperature section and a low temperature section, the drying efficiency and the drying effect of the medicine powder are improved, and the production speed of the medicine is accelerated.

As shown in fig. 3, optionally, a scattering shaft 46 is further disposed inside the drying cylinder 41, and the scattering shaft 46 extends along the axial direction of the rotating shaft 45 and is far away from the air outlet 14; a plurality of stirring teeth 47 are arranged on the scattering shaft 46 at intervals; a driving gear 48 is fixedly connected to the rotating shaft 45, a driven gear 49 is fixedly connected to the lower portion of the scattering shaft 46, and the driven gear 49 is meshed with the driving gear 48.

Through driven gear 49 and the drive gear 48 of meshing, pivot 45 drives and breaks up axle 46 and stirring tooth 47 and rotate, and breaks up axle 46 and dry section of thick bamboo 41 and do the opposite direction rotation for the medicine in the dry section of thick bamboo 41 is heated more evenly, guarantees that the medicine can be fully dried. Preferably, a sealed cylinder is provided outside the driven gear 49 and the driving gear 48 to protect them from the negative effects of solid drug powder on the rotation of the gears. The scattering shaft 46 and the stirring teeth 47 are used for scattering the medicine powder, so that the problem that the medicine powder cannot be thoroughly dried due to the agglomeration of the medicine powder is solved, and the drying effect of the medicine powder is improved.

Optionally, the diameter of the through hole in the flap 31 is larger than the diameter of the through hole in the drying cylinder 41. The wettability of the medicine on the turnover plate 31 is higher than that of the medicine in the drying cylinder 41, and the diameter of the through hole on the turnover plate 31 is enlarged, so that the medicine on the turnover plate 31 can be prevented from accumulating or staying.

As shown in fig. 3, optionally, a grating plate 15 is provided inside the housing 1 at the air outlet 14. The high-temperature air sent from the air inlet 13 forms high-temperature air flow in the process of flowing to the air outlet 14, the flow of the high-temperature air flow accelerates the drying of the wet medicines on the turnover plate 31, the medicine powder possibly is entrained in the air flow, and the medicine powder is intercepted through the collision of the grating plate 15, so that the medicine loss is reduced.

As shown in fig. 3, alternatively, the air outlet 14 is connected to an inlet of an external air pump 51 through an air suction pipe, and an outlet of the air pump 51 is connected to an exhaust gas recovery unit. The air pump 51 can pump the air in the shell 1 away, further improves the flow speed of high-temperature air flow, can also reduce the air pressure in the shell 1, further improves the evaporation rate of water, and simultaneously can pump the moisture in the shell 1 away, thereby being beneficial to further improving the drying efficiency and the drying effect of the device and realizing the low-temperature low-pressure quick drying of the medicine.

As shown in fig. 3, a detachable filter screen 16 is optionally arranged between the air outlet 14 and the air extraction pipe, and the mesh diameter of the filter screen 16 is smaller than that of the grating plate 15. The medicine powder passing through the grating plate 15 is further intercepted by the filter screen 16, and cannot be blown out of the shell 1 along with the air flow, so that the loss of the medicine in the drying process is avoided, and the filter screen 16 can be cleaned and the intercepted medicine can be recovered at regular intervals. Preferably, the mesh diameter of the screen 16 is smaller than the particle size of the drug powder, and the screen 16 may be selected and replaced according to the particle size of the drug to be dried, thereby ensuring that the drug cannot pass through the screen 16 but does not interfere with the flow of gas.

In order to prevent the air flow from being entrained with the medicine to enter the air pump 51 and cause the air pump 51 to malfunction, a filter 52 is optionally arranged on the air pump, and the filter 52 is filled with the adsorbent. The air pump 51 pumps out the air in the shell 1, the pumped air possibly carries medicine powder, the adsorbent in the filter 52 is utilized to adsorb the medicine powder, the adsorbed air is discharged into the air pump 51 again, and the adsorbed medicine is recovered from the adsorbent at regular intervals, so that the loss of the medicine is avoided.

As shown in fig. 3, optionally, a low-temperature air return port 17 is arranged on the side wall of the lower part of the shell 1, and the low-temperature air return port 17 is positioned below the drying cylinder 41; the low-temperature gas return port 17 is connected with the outlet of the air pump 51 through a return air pipe. The high-temperature air flows through the turnover plate 31 to absorb part of heat of the wet medicine, and becomes low-temperature air flow with reduced temperature when being extracted from the shell 1, and the low-temperature air flow is circulated and returned to the lower part of the drying cylinder 41 again through the low-temperature air return port 17 and the return air pipe, so that the drying of the medicine in the drying cylinder 41 can be accelerated in the process of flowing from bottom to top, the recycling of the high-temperature air is realized, and the resources are saved.

In the specific implementation, in the initial stage of drug drying, more steam is entrained in the air flow pumped by the air pump 51, and the air flow can be directly sent to the waste gas recovery unit, and when the air flow enters the later drying stage and the moisture and the steam are reduced, part of the air flow is returned to the drying cylinder 41, so that the drying speed of the drug in the drying cylinder 41 in a low-temperature environment is increased, and the flow speed of the returned low-temperature air flow is controlled within a smaller range, so as to prevent the dried drug powder in the shell 1 from being blown out of the shell 1. In another embodiment, when the drying workload is large, part of the low-temperature air flow can be returned to the drying cylinder 41 at the initial stage of drying, so that the drying rate can be further improved, and the flow rate of the low-temperature air flow can be regulated at any time during the drying process so as to prevent the dried medicine powder from being blown out of the shell 1.

As shown in fig. 3, optionally, a drying box 53 is arranged on the reflux air pipe, and the drying box 53 is filled with a drying agent. The air source of the return air pipe is the air pumped out from the shell 1, wherein the air possibly carries steam generated in the high-temperature drying process, and the steam is absorbed by the drying agent in the drying box 53, so that the moist air can be prevented from entering the shell 1 again, and the working efficiency is improved. The drying agent can be calcium chloride drying agent, and the calcium chloride drying agent has the advantages of high adsorption speed, high adsorption capacity, no toxicity, no smell, no harm to human body, and no evaporation at high temperature after complete moisture absorption.

Optionally, a temperature sensor, a pressure sensor and a humidity sensor (conventional arrangement, not shown in the drawings) are also provided in the housing 1. The temperature sensor and the pressure sensor are mainly used for monitoring the temperature and the pressure in the shell 1, so that the shell 1 is kept in a low-temperature state conveniently, the pressure in the shell 1 is regulated and controlled, the humidity sensor is mainly used for monitoring the humidity of air flow in the shell 1, when the humidity sensor detects that the moisture in the air flow is reduced to a certain value, a signal can be sent to a worker, the completion of drying is prompted, and accordingly discharging can be timely carried out.

The drying cylinder 41 is preferably cylindrical in shape. The shape of the case 1 is not particularly limited, and may be square, cylindrical, or other shapes, for example, and preferably cylindrical for smooth blanking. The size of the housing 1 is not particularly limited, and may be set according to the amount of the medicine to be processed, for example.

When the low-temperature drying device for producing the medicine disclosed by the utility model specifically works, a low-temperature heat source medium is firstly introduced into the temperature control cavity 2 to preheat the inner space of the shell 1, so that the temperature in the shell 1 reaches the optimal drying temperature of medicine powder. The wet medicine powder is conveyed to the turning plate 31 in the horizontal state in the shell 1 through the feeding port 12, and the dry gas with slightly higher temperature than the medium in the temperature control cavity 2 is introduced from the air inlet 13, and the high-temperature gas directly contacts with the medicine for heat exchange and takes away the generated water vapor. At the same time, the air pump 51 connected with the air outlet 14 is started, and the air flows to the air outlet 14, so that the evaporation speed of the water is improved. The powder possibly carried in the air flow collides with the grating plate 15 and is intercepted, and then is further intercepted by the filter screen 16, so that the loss of the medicine in the drying process is avoided. After the high-temperature gas is pumped out of the shell 1 by the air pump 51, the entrained medicine is filtered again by the filter 52, then is conveyed by the air pump 51, part of the medicine enters the waste gas recovery unit, part of the medicine enters the lower part of the shell 1 by the low-temperature gas return port 17 on the shell 1 after being dried by the drying box 53, and is discharged from the air outlet 14, and the medicine in the drying cylinder 41 can be dried by the low-temperature gas flow with reduced temperature, so that the energy recycling is realized.

At the same time as feeding, the electric push rod 33 and the motor 44 are started. The electric push rod 33 drives the turning plate 31 to incline and rotate to different degrees, so that the medicines on the turning plate 31 turn over along with the turning plate to be difficult to agglomerate and agglomerate, and the medicines can also fall down through the inclined part or through holes on the turning plate 31 during turning over. After the medicine falls, the medicine enters the drying cylinder 41 below, the drying cylinder 41 is in a rotating state under the drive of the motor 44 and the rotating shaft 45, the rotating shaft 45 also drives the scattering shaft 46 and the stirring teeth 47 to rotate at a differential speed opposite to the drying cylinder 41, the medicine powder is continuously scattered, the problem that the medicine powder cannot be thoroughly dried due to the agglomeration of the medicine powder is solved, and the medicine is uniformly heated. The medicine rotates along with the drying cylinder 41 and makes centrifugal movement, and is thrown onto the inner wall of the shell 1 through the material passing hole, directly contacts with the inner wall of the temperature control cavity 2 and exchanges heat, so that the medicine is continuously dispersed and dried at a low temperature section.

The humidity sensor is mainly used for monitoring the humidity of air flow in the shell 1, and after the drying cylinder 41 and medicines on the inner wall of the shell 1 are dried, the medicines are finally collected to the bottom of the shell 1 under the action of gravity, when the humidity sensor detects that the moisture in the air flow is reduced to a certain value, a signal can be sent to a worker to prompt the completion of drying, so that the dried medicine powder can be timely discharged from the discharge port 11 to the low-temperature drying device.

In the present utility model, the detailed structure of some devices is not described in detail, but is known in the art, and is not described herein.

The pressure sensor, the flowmeter or the temperature sensor is arranged between different units and devices on the conveying pipeline inside the device, and meanwhile, different valves, such as a pressure relief valve, a pressure regulating valve, a safety valve and the like, are also arranged for regulating and stabilizing the pressure of the whole device.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will appreciate that; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A low temperature drying apparatus for pharmaceutical production, comprising: the bottom of the shell is obliquely arranged, and a discharge hole is formed in the lower end of the inclination; a temperature control cavity is formed in the outer side wall of the shell in a surrounding mode; the top of the temperature control cavity is provided with a medium outlet, and the bottom of the temperature control cavity is provided with a medium inlet;

two turning plates with through holes are horizontally arranged in the middle of the shell, the two turning plates are symmetrically arranged, and each turning plate is rotationally connected with the inner wall of the shell in the horizontal direction through a rotating rod arranged below the turning plates; an electric push rod is arranged in the center of the top of the shell, and the output end of the electric push rod penetrates through the top of the shell and is connected with the side walls of the two turning plates through universal connecting shafts respectively; two feed inlets are formed in the tops of the shells corresponding to the central positions of the two turning plates; an air inlet is further formed in one side of the top of the shell; an air outlet is arranged on the side wall of the shell far away from the air inlet, and the air outlet is arranged below the turning plate;

an open drying cylinder is arranged in the shell below the air outlet, a plurality of material passing holes are uniformly distributed on the side wall and the bottom wall of the drying cylinder, a plurality of positioning sliding blocks are arranged on the upper part of the outer wall of the drying cylinder, an annular strip is horizontally fixed on the inner wall of the shell, an annular sliding groove is formed in the inner side wall of the annular strip, and the positioning sliding blocks are in sliding connection with the inner wall of the annular sliding groove; the central point outside the bottom of the shell is provided with a motor, the output end of the motor is connected with a rotating shaft, and the rotating shaft penetrates through the shell and the bottom wall of the drying cylinder and extends to the inside of the cylinder body of the drying cylinder.

2. The low-temperature drying device for producing medicines according to claim 1, wherein a scattering shaft is further arranged in the drying cylinder, extends along the axial direction of the rotating shaft and is far away from the air outlet; a plurality of stirring teeth are arranged on the scattering shaft at intervals; the rotary shaft is fixedly connected with a driving gear, the lower part of the scattering shaft is fixedly connected with a driven gear, and the driven gear is meshed with the driving gear.

3. The device according to claim 1, wherein the diameter of the through hole in the flap is larger than the diameter of the feed hole in the drying cylinder.

4. The apparatus according to claim 1, wherein a grating plate is provided inside the housing at the air outlet.

5. The apparatus according to claim 4, wherein the air outlet is connected to an inlet of an external air pump via an air suction pipe, and an outlet of the air pump is connected to an exhaust gas recovery unit.

6. The apparatus according to claim 5, wherein a detachable filter screen is provided between the air outlet and the air exhaust pipe, and the mesh diameter of the filter screen is smaller than the mesh diameter of the grating plate.

7. The apparatus according to claim 5, wherein a filter is mounted on the exhaust pipe, and the filter is filled with an adsorbent.

8. The device according to claim 5, wherein a side wall of the lower part of the housing is provided with a low-temperature air return port, and the low-temperature air return port is positioned below the drying cylinder; the low-temperature gas reflux port is connected with the outlet of the air pump through a reflux air pipe.

9. The apparatus according to claim 8, wherein a drying box is provided on the return air pipe, and a drying agent is filled in the drying box.

10. The cryogenic drying apparatus for pharmaceutical production according to any one of claims 1-9, wherein a temperature sensor, a pressure sensor and a humidity sensor are further provided in the housing.