Drying equipment for pharmaceutical excipient production

Abstract

This utility model relates to a drying equipment for the production of pharmaceutical excipients, belonging to the field of pharmaceutical equipment technology. The equipment includes a drying cylinder, a stirring and scraping mechanism, a heat collection chamber, and a drive mechanism. The drying cylinder is inclined relative to the horizontal plane, and has an inlet and a outlet. The outlet is located at the lowest point of the drying cylinder, and the inlet is located at the highest point. The stirring and scraping mechanism is rotatably disposed inside the drying cylinder, used to stir the material and scrape off residual material on the inner wall. The drive mechanism is located at one end of the drying cylinder and connected to the stirring and scraping mechanism, used to drive the stirring and scraping mechanism to rotate. The heat collection chamber is used for collecting hot airflow. This utility model, through the design of the heat collection chamber surrounding the drying cylinder, allows the heat collection chamber to both blow hot air from the top of the drying cylinder for drying and simultaneously heat and dry the lower part of the drying cylinder through its lower part surrounding the lower part of the drying cylinder.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a drying equipment for the production of pharmaceutical excipients. Background Technology

[0002] Sodium carboxymethyl cellulose (CMC) is an organic compound, a carboxymethylated derivative of cellulose, and the most important ionic cellulose gum. In the preparation of CMC, the raw material needs to be dried. However, existing drying devices often place the raw material uniformly into a drying chamber for drying. Due to the accumulation of raw material, only the material at the top receives sufficient drying heat, while the material at the bottom dries poorly. This results in significant differences in the quality of the final CMC produced. Furthermore, even after stirring, the hot air blowing only dries the surface CMC, and the alternating stirring process still affects the overall drying efficiency. For example, Chinese invention patent CN117073332A discloses a high-efficiency drying device for the preparation of CMC, including a support frame and a main drying unit for raw material processing, wherein the main drying unit is movably connected to the frame. This invention uses a drive component to move a turning roller, thereby turning over the raw materials inside the main chamber during drying. A shaking component further assists this, causing the main chamber, loaded with raw materials, to sway left and right simultaneously with the turning roller. This causes the raw materials at the bottom corners of the main chamber to gather below the turning roller and be turned over. This not only improves the efficiency of drying the raw materials inside the main chamber but also ensures the uniformity of drying, avoiding quality differences in subsequent product preparation. However, it does not solve the problem of not being able to heat and dry the sodium carboxymethyl cellulose at the bottom, and the overall heating efficiency still does not meet the ideal requirements. Utility Model Content

[0003] To address the technical problems of existing drying equipment being unable to heat the bottom sodium carboxymethyl cellulose and having low heating efficiency, and to improve the uniformity of heating and drying efficiency of pharmaceutical excipients, this utility model provides a drying equipment for the production of pharmaceutical excipients.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: A drying device for pharmaceutical excipient production is provided, including a drying cylinder, a stirring and scraping mechanism, a heat collection chamber, and a driving mechanism. The drying cylinder is inclined relative to a horizontal plane, and has an inlet and a outlet. The outlet is located at the lowest horizontal position of the drying cylinder, and the inlet is located at the highest horizontal position. The stirring and scraping mechanism is rotatably disposed inside the drying cylinder for stirring the material and scraping off residual material on the inner wall. The driving mechanism is disposed at one end of the drying cylinder and connected to the stirring and scraping mechanism for driving the stirring and scraping mechanism to rotate. The heat collection chamber is used for hot airflow convergence. The heat collection chamber covers the outside of the drying cylinder and extends from the top to the bottom of the drying cylinder. The heat collection chamber is connected to an air inlet pipe, and several air blowing holes are opened at the top of the drying cylinder corresponding to the position of the heat collection chamber. The air blowing holes are connected to the heat collection chamber.

[0005] Preferably, a vibration motor is provided at the lower part of the drying cylinder, and an installation area is reserved at the lower part of the heat collection chamber corresponding to the position of the vibration motor for direct connection between the vibration motor and the bottom side wall of the drying cylinder.

[0006] Preferably, the stirring and scraping mechanism includes a rotating shaft, the two ends of which are rotatably connected to the two ends of the drying cylinder, one end of which is coaxially connected to the driving mechanism, a plurality of stirring rods are provided on the rotating shaft, and a flipping shovel is connected between two adjacent stirring rods located on the same side of the rotating shaft, the outer surface of the flipping shovel is arc-shaped and closely fits the inner wall of the drying cylinder, and multiple flipping shovels are provided on the rotating shaft.

[0007] Preferably, the shovel includes a base plate and a back plate located on one side of the base plate. The longitudinal section of the main structure formed by the back plate and the base plate is L-shaped. A side plate is connected between the two sides of the back plate and the two sides of the base plate. The outer side of the base plate is an arc-shaped surface and fits against the inner wall of the drying cylinder. The thickness of the side of the base plate away from the back plate gradually decreases from near the back plate to away from the back plate. The base plate, the back plate, and the two side plates are combined to form a bucket, which facilitates shoveling up materials.

[0008] Preferably, the rotating shaft is provided with a plurality of fixed sleeves that rotate with the rotating shaft, and each fixed sleeve is provided with at least two stirring rods at equal intervals in the circumferential direction. Two adjacent fixed sleeves form a group, and a shovel is connected between the stirring rods on the same side of each group of fixed sleeves. The bucket opening of the shovel faces the rotation direction of the rotating shaft.

[0009] Preferably, two support columns are provided on the top of the heat collection chamber at the position corresponding to the air blowing hole. A horizontally arranged transmission crossbar is connected between the two support columns. Elongated holes are opened at both ends of the transmission crossbar at the positions corresponding to the support columns. Limit pins are provided on the support columns at the positions corresponding to the elongated holes. The limit pins are slidably disposed in the elongated holes. A first drive motor is provided on one side of one of the support columns. A cam is provided on the output shaft of the first drive motor. A transmission connecting rod is hinged on the cam. The other end of the transmission connecting rod is hinged to the transmission crossbar.

[0010] Each of the air blowing holes is hinged with a baffle plate. The two sides of the middle part of the baffle plate are rotatably connected to the inner wall of the air blowing hole. An elastic rope is connected to the transmission crossbar corresponding to the position of each baffle plate. The other end of the elastic rope is connected to the top of the baffle plate to drive the baffle plate to swing with the transmission crossbar.

[0011] Preferably, the heat collection chamber covers at least 3 / 4 of the outer curved surface of the drying cylinder, and the distance between the outer surface of the heat collection chamber and the outer wall of the drying cylinder gradually decreases from top to bottom.

[0012] Preferably, the heat collection chamber is connected to a blower pipe, and the other end of the blower pipe is connected to the end of the drying cylinder near the feed inlet.

[0013] Preferably, the air outlet end of the blower pipe is provided with a filter screen.

[0014] Preferably, the lower two ends of the drying cylinder are provided with a plurality of support legs, and the lengths of the support legs at the two ends are different to adapt to the inclined drying cylinder.

[0015] The beneficial effects of this utility model are as follows: The design of the heat collection chamber surrounding the drying cylinder allows the heat collection chamber to blow hot air from the top of the drying cylinder for drying, while simultaneously heating and drying the lower part of the drying cylinder through the design of the lower part of the heat collection chamber surrounding the lower part of the drying cylinder. Combined with the stirring and scraping mechanism, this improves drying efficiency. The inclined setting of the drying cylinder, along with the vibration motor, causes the material to move automatically downwards during the drying and stirring process, reducing adhesion and clumping, and facilitating subsequent material discharge. The transmission crossbar drives the baffle plate to swing back and forth, increasing the airflow area and ensuring uniform drying. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 This is a front view of the internal structure of a drying device for the production of pharmaceutical excipients provided in an embodiment of the present invention;

[0018] Figure 2 This is a front view of the overall structure of a drying device for pharmaceutical excipient production provided in an embodiment of the present invention;

[0019] Figure 3 A side view of the overall structure of a drying device for the production of pharmaceutical excipients provided in an embodiment of this utility model;

[0020] Figure 4 A cross-sectional view of a stirring and scraping mechanism in a drying equipment for pharmaceutical excipient production provided in an embodiment of this utility model;

[0021] Figure 5 for Figure 1 Enlarged view of the structure of A in the middle.

[0022] The components include: 1. Drying cylinder; 101. Feed inlet; 102. Discharge outlet; 103. Air blowing hole; 104. Support leg; 2. Stirring and scraping mechanism; 201. Rotating shaft; 202. Stirring rod; 203. Tilting shovel; 2031. Base plate; 2032. Back plate; 2033. Side plate; 204. Fixing sleeve; 3. Drive mechanism; 4. Heat collection chamber; 401. Support column; 4011. Limit pin; 402. Transmission crossbar; 4021. Long hole; 403. First drive motor; 404. Cam; 405. Transmission connecting rod; 406. Baffle plate; 407. Elastic rope; 408. Air blowing pipe; 409. Filter screen; 5. Vibration motor. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] like Figures 1-5As shown, a drying device for pharmaceutical excipient production includes a drying cylinder 1, a stirring and scraping mechanism 2, a heat collection chamber 4, and a drive mechanism 3. The drying cylinder 1 has a cylindrical structure with end caps at both ends for easy internal maintenance. The drying cylinder 1 is inclined relative to the horizontal plane to facilitate the automatic downward sliding of materials, and the displacement is smoother through stirring and vibration. The drying cylinder 1 is provided with a feed inlet 101 and a discharge outlet 102. The feed inlet 101 is a feed hopper, and the discharge outlet 102 is located at the lowest horizontal position of the drying cylinder 1. The heat collection chamber 4... A corresponding area is reserved at the position of the discharge port 102 to facilitate the direct connection of the discharge port 102 to the drying cylinder 1 and discharge of materials. The discharge port 102 is in a closed state when drying is not complete. It is equipped with a discharge valve, and the discharge valve is flush with the inner wall of the drying cylinder 1 to prevent materials from entering the hidden area of ​​the discharge port 102, which would prevent them from being heated and dried. The feed port 101 is located at the highest horizontal position of the drying cylinder 1, which facilitates the automatic downward sliding of materials under their own gravity. At the same time, it can also play a role in the transmission of materials during stirring.

[0027] The stirring and scraping mechanism 2 is rotatably installed inside the drying cylinder 1 to stir the material and scrape off the residual material on the inner wall; the driving mechanism 3 is an electric motor, which is located at the left end of the drying cylinder 1 and connected to the stirring and scraping mechanism 2. The electric motor is used to drive the stirring and scraping mechanism 2 to rotate.

[0028] The heat collection chamber 4 is used for hot airflow convergence. It covers the outside of the drying cylinder 1. The length of the heat collection chamber 4 is less than the axial length of the drying cylinder 1, but greater than 2 / 3 of its axial length. The heat collection chamber 4 extends from the top to the bottom of the drying cylinder 1. It is connected to an air inlet pipe, which connects to an external hot air source. The air inlet pipe is located at the top of the heat collection chamber 4. Several air blowing holes 103 are opened at the top of the drying cylinder 1 corresponding to the positions of the heat collection chamber 4. These air blowing holes 103 communicate with the heat collection chamber 4. The diameter of each air blowing hole 103 is 2 cm, and they are evenly distributed on the top of the drying cylinder 1.

[0029] The working process and principle of the above structure are as follows:

[0030] Hot air enters the heat collection chamber 4 through the air inlet pipe. The airflow in the heat collection chamber 4 diffuses throughout the entire heat collection chamber, thereby heating the cylinder wall of the drying cylinder 1. Most of the hot airflow enters the drying cylinder 1 through the air blowing hole 103. The material to be dried is fed into the feed inlet 101. The drive mechanism 3 drives the stirring and scraping mechanism 2 to rotate, stirring the material and turning it upside down to ensure uniform drying. This allows hot air to continuously blow onto the surface of new material. For the material at the bottom, the hot air in the heat collection chamber 4 heats the cylinder wall of the drying cylinder 1. The heat is used to simultaneously heat the lower material, which can prevent uneven drying and improve the overall drying efficiency of the material. It also scrapes off the residual material on the inner wall, making it easier for the material to move downwards under its own gravity. After the material is dried, it is discharged from the discharge port 102. After the hot air is blown inside the drying cylinder 1, it is slowly discharged from the feed port 101. Due to the inclined setting of the drying cylinder 1, the material is automatically discharged to the discharge port 102 by its own gravity and the stirring action of the stirring and scraping mechanism 2.

[0031] In another embodiment of this utility model, based on embodiment 1, as follows: Figures 1-3 As shown, a vibration motor 5 is installed at the lower part of the drying cylinder 1, and a mounting area is provided at the lower part of the heat collection chamber 4 corresponding to the position of the vibration motor 5 for direct connection between the vibration motor 5 and the bottom side wall of the drying cylinder 1. The mounting area facilitates direct contact between the vibration motor 5 and the bottom inner wall of the drying cylinder 1.

[0032] After the vibration motor 5 starts working, the vibration force generated can shake off the material adhering to the inner wall of the drying cylinder 1, preventing the material from sticking and clumping, and allowing the material to move automatically downward along the inclined inner wall of the drying cylinder 1 under the action of vibration, so that the material can automatically gather at the discharge port 102.

[0033] In another embodiment of this utility model, based on embodiment 1, as follows: Figures 1-4 As shown, the stirring and scraping mechanism 2 includes a rotating shaft 201. The two ends of the rotating shaft 201 are rotatably connected to the two ends of the drying cylinder 1, respectively. One end of the rotating shaft 201 is coaxially connected to the driving mechanism 3. The drying cylinder 1 has a cylindrical structure, and the axis of the drying cylinder 1 coincides with the axis of the rotating shaft 201. Several stirring rods 202 are provided on the rotating shaft 201. A shovel 203 is connected between two adjacent stirring rods 202 located on the same side of the rotating shaft 201 for turning the material and lifting the bottom material upward. The outer surface of the shovel 203 is arc-shaped and fits tightly against the inner wall of the drying cylinder 1. Multiple shovels 203 are provided on the rotating shaft 201.

[0034] The stirring rod 202 serves a stirring function, but stirring cannot directly turn most of the material at the bottom upwards. It can only gradually turn the material at the bottom upwards with stirring. The flipping shovel 203 mainly serves to directly turn the material at the bottom upwards. The flipping shovel 203 directly contacts the inner wall of the bottom of the drying cylinder 1 and shovels the material into its interior. As the rotating shaft 201 rotates, the flipping shovel 203 carries the material at the bottom upwards, directly contacting the hot air blown out from the air blowing hole 103 above, thus achieving drying. The flipping shovel 203 continues to rotate around the rotating shaft 201, and its bearing surface becomes downwards. The shoveled material at the bottom is sprinkled onto the surface of the upper material, becoming the new upper material for drying. The drying effect is better, the drying uniformity is better, and the drying efficiency is greatly improved compared to traditional stirring drying. In addition, during the rotation process, the flipping shovel 203 can scrape off the material adhering to the inner wall of the drying cylinder 1, preventing the material from adhering and accumulating to form clumps.

[0035] In another embodiment of this utility model, based on embodiment 1, as follows: Figures 1-4 As shown, the tipper 203 includes a base plate 2031 and a back plate 2032 located on one side of the base plate 2031. The longitudinal section of the main structure formed by the back plate 2032 and the base plate 2031 is L-shaped. A side plate 2033 is connected between the two sides of the back plate 2032 and the two sides of the base plate 2031. The outer side of the base plate 2031 is an arc-shaped surface and fits against the inner wall of the drying cylinder 1. The thickness of the side of the base plate 2031 away from the back plate 2032 gradually decreases from the direction close to the back plate 2032 to the direction away from the back plate 2032. The base plate 2031, the back plate 2032 and the two side plates 2033 are combined to form a bucket, which facilitates the scooping of materials.

[0036] The side plate 2033 improves the strength between the bottom plate 2031 and the back plate 2032, enabling it to scoop up more material and avoid damage from the weight of the material. The thickness of the bottom plate 2031 gradually decreases, which helps the bottom plate 2031 to scrape and scoop up the material on the inner wall of the drying cylinder 1, preventing the material from being missed and unable to be scooped up. In addition, it can reduce the frictional resistance when scooping in material. At the same time, the bucket structure formed by the shovel 203 is conducive to carrying the bottom material to the upper surface.

[0037] In another embodiment of this utility model, based on embodiment 1, as follows: Figures 1-4As shown, a number of fixed sleeves 204 are provided on the rotating shaft 201, which rotate with the rotating shaft 201. The fixed sleeves 204 facilitate the connection of the stirring rods 202. The fixed sleeves 204 and the rotating shaft 201 are connected by splines. Each fixed sleeve 204 is provided with at least two stirring rods 202 at equal intervals in the circumferential direction. Two adjacent fixed sleeves 204 form a group. A shovel 203 is connected between the stirring rods 202 on the same side of each group of fixed sleeves 204. The bucket opening of the shovel 203 faces the rotation direction of the rotating shaft 201.

[0038] The group connection of the fixed sleeve 204 allows for quick replacement when the shovel 203 or stirring rod 202 is damaged, making maintenance more convenient.

[0039] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 and Figure 5 As shown, two support columns 401 are provided on the top of the heat collection chamber 4 at the position corresponding to the air blowing hole 103. A transmission crossbar 402 is connected between the two support columns 401. Long holes 4021 are opened at both ends of the transmission crossbar 402 at the positions corresponding to the support columns 401. A limit pin 4011 is provided on each support column 401 at the position corresponding to the long hole 4021. The two limit pins 4011 are slidably disposed in the two long holes 4021 respectively. A first drive motor 403 is provided on one side of the support column 401 on the left side. A cam 404 is provided on the output shaft of the first drive motor 403. A transmission connecting rod 405 is hinged on the cam 404. The other end of the transmission connecting rod 405 is hinged to the transmission crossbar 402.

[0040] Each air blowing hole 103 is hinged with a baffle plate 406. The two sides of the middle part of the baffle plate 406 are rotatably connected to the inner wall of the air blowing hole 103. An elastic rope 407 is connected to the transmission crossbar 402 corresponding to the position of each baffle plate 406. The other end of the elastic rope 407 is connected to the top of the baffle plate 406 to drive the baffle plate 406 to swing with the transmission crossbar 402.

[0041] The first drive motor 403 drives the cam 404 to rotate. The cam 404 drives the transmission crossbar 402 to move horizontally between the two support columns 401 through the transmission link 405. The length of the elongated hole 4021 is the range of movement of the transmission crossbar 402. During the horizontal movement, the transmission crossbar 402 drives the baffle plate 406 to swing left and right through the elastic rope 407, so that the hot air in the heat collection chamber 4 can be changed in direction, the blowing area is larger, the heating and drying uniformity is better, and the heating and drying efficiency is improved. The use of the elastic rope 407 can avoid the occurrence of stroke limit.

[0042] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 3As shown, the heat collection chamber 4 covers at least 3 / 4 of the outer curved surface of the drying cylinder 1. From the top to the bottom of the drying cylinder 1, the distance between the outer surface of the heat collection chamber 4 and the outer wall of the drying cylinder 1 gradually decreases from top to bottom.

[0043] The distance between the outer surface of the heat collection chamber 4 and the outer wall of the drying cylinder 1 gradually decreases from top to bottom. This is mainly to avoid the lower part of the heat collection chamber 4 being too large, causing too much hot air to concentrate in the lower part of the heat collection chamber 4, which would affect the strength of the air blown out of the air blowing hole 103. The heat collection chamber 4 covers the outer curved surface of the drying cylinder 1, so that it can heat the drying cylinder 1 as much as possible, thereby achieving dual heating and drying from the inside and outside, and improving the overall drying efficiency.

[0044] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 and Figure 2 As shown, the heat collection chamber 4 is connected to a blower pipe 408, and the other end of the blower pipe 408 is connected to the end of the drying cylinder 1 near the feed inlet 101.

[0045] The blowing pipe 408 is designed to blow air outward from the end of the drying cylinder 1, which is beneficial for blowing the material to move downward along the inner wall of the drying cylinder 1, and can also blow air to heat and dry the side of the material at the end.

[0046] In another embodiment of this utility model, based on embodiment 1, as follows: Figure 1 As shown, a filter screen 409 is provided at the air outlet end of the blower duct 408.

[0047] The filter screen 409 is designed to prevent material from entering the blower duct 408.

[0048] In another embodiment of this utility model, based on embodiment 1, as follows: Figures 1-4 As shown, several support legs 104 are provided at both ends of the lower part of the drying cylinder 1. The lengths of the support legs 104 at both ends are different to adapt to the inclined drying cylinder 1.

[0049] The different lengths of the support legs 104 are mainly suitable for the inclined structure of the drying cylinder 1, ensuring its operational stability.

[0050] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limitations; therefore, other examples of exemplary embodiments may have different values.

[0051] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0052] It should be noted that when an element is said to be "fixed" to another element, it can be directly on the other element or there may be an intervening element. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. Conversely, when an element is said to be "directly" on another element, there is no intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0053] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] Finally, 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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0055] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0056] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drying device for the production of pharmaceutical excipients, characterized in that, include: A drying cylinder (1) is inclined relative to a horizontal plane. The drying cylinder (1) is provided with a feed inlet (101) and a discharge outlet (102). The discharge outlet (102) is located at the lowest horizontal position of the drying cylinder (1), and the feed inlet (101) is located at the highest horizontal position of the drying cylinder (1). Stirring and scraping mechanism (2), which is rotatably installed inside the drying cylinder (1), is used to stir the material and scrape off the residual material on the inner wall; The driving mechanism (3) is located at one end of the drying cylinder (1) and connected to the stirring and scraping mechanism (2) for driving the stirring and scraping mechanism (2) to rotate. A heat collection chamber (4) is used for the convergence of hot airflow. The heat collection chamber (4) covers the outside of the drying cylinder (1). The heat collection chamber (4) extends from the top of the drying cylinder (1) to the bottom of the drying cylinder (1). The heat collection chamber (4) is connected to an air inlet pipe. Several air blowing holes (103) are opened on the top of the drying cylinder (1) corresponding to the position of the heat collection chamber (4). The air blowing holes (103) are connected to the heat collection chamber (4).

2. The drying apparatus for producing a pharmaceutical material as set forth in claim 1, wherein The lower part of the drying cylinder (1) is provided with a vibration motor (5), and the lower part of the heat collection chamber (4) is provided with an installation area for direct connection between the vibration motor (5) and the bottom side wall of the drying cylinder (1).

3. The drying apparatus for producing a pharmaceutical material as set forth in claim 1, wherein The stirring and scraping mechanism (2) includes a rotating shaft (201), the two ends of which are rotatably connected to the two ends of the drying cylinder (1), one end of which is coaxially connected to the driving mechanism (3), and a plurality of stirring rods (202) are provided on the rotating shaft (201). A flipping shovel (203) is connected between two adjacent stirring rods (202) located on the same side of the rotating shaft (201). The outer side of the flipping shovel (203) is arc-shaped and fits tightly against the inner wall of the drying cylinder (1). A plurality of flipping shovels (203) are provided on the rotating shaft (201).

4. The drying apparatus for producing a pharmaceutical material as set forth in claim 3, wherein The shovel (203) includes a base plate (2031) and a back plate (2032) located on one side of the base plate (2031). The longitudinal section of the main structure formed by the back plate (2032) and the base plate (2031) is L-shaped. A side plate (2033) is connected between the two sides of the back plate (2032) and the two sides of the base plate (2031). The outer side of the base plate (2031) is an arc-shaped surface and fits against the inner wall of the drying cylinder (1). The thickness of the side of the base plate (2031) away from the back plate (2032) gradually decreases from the direction close to the back plate (2032) to the direction away from the back plate (2032). The base plate (2031), the back plate (2032) and the two side plates (2033) are combined to form a bucket, which facilitates the shoveling of materials.

5. The drying apparatus for producing a pharmaceutical material as set forth in claim 4, wherein The rotating shaft (201) is provided with a plurality of fixed sleeves (204) that rotate with the rotating shaft (201). Each fixed sleeve (204) is provided with at least two stirring rods (202) at equal intervals in the circumferential direction. Two adjacent fixed sleeves (204) form a group. A shovel (203) is connected between the stirring rods (202) on the same side of each group of fixed sleeves (204). The bucket opening of the shovel (203) faces the rotation direction of the rotating shaft (201).

6. The drying apparatus for producing a pharmaceutical material as set forth in claim 1, wherein Two support columns (401) are provided at the top of the heat collection chamber (4) corresponding to the position of the air blowing hole (103). A transmission crossbar (402) is connected between the two support columns (401). Long holes (4021) are opened at both ends of the transmission crossbar (402) corresponding to the positions of the support columns (401). A limit pin (4011) is provided on the support column (401) corresponding to the position of the long hole (4021). The limit pin (4011) is slidably disposed in the long hole (4021). A first drive motor (403) is provided on one side of one of the support columns (401). A cam (404) is provided on the output shaft of the first drive motor (403). A transmission connecting rod (405) is hinged on the cam (404). The other end of the transmission connecting rod (405) is hinged to the transmission crossbar (402). A baffle plate (406) is hinged inside each of the air blowing holes (103). The two sides of the middle part of the baffle plate (406) are rotatably connected to the inner wall of the air blowing hole (103). An elastic rope (407) is connected to the transmission crossbar (402) corresponding to the position of each baffle plate (406). The other end of the elastic rope (407) is connected to the top of the baffle plate (406) to drive the baffle plate (406) to swing with the transmission crossbar (402).

7. The drying apparatus for producing a pharmaceutical material as set forth in claim 1, wherein The heat collection chamber (4) covers at least 3 / 4 of the outer curved surface of the drying cylinder (1). From the top to the bottom of the drying cylinder (1), the distance between the outer surface of the heat collection chamber (4) and the outer wall of the drying cylinder gradually decreases from top to bottom.

8. The drying apparatus for producing a pharmaceutical material as set forth in claim 7, wherein The heat collection chamber (4) is connected to a blower pipe (408), and the other end of the blower pipe (408) is connected to the end of the drying cylinder (1) near the feed inlet (101).

9. The drying equipment for pharmaceutical excipient production as described in claim 8, characterized in that, The air outlet of the blower pipe (408) is equipped with a filter screen (409).

10. The drying apparatus for producing a pharmaceutical material as set forth in claim 1, wherein The lower two ends of the drying cylinder (1) are provided with a number of support legs (104), and the lengths of the support legs (104) at the two ends are different to adapt to the inclined drying cylinder (1).

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