Low temperature vacuum belt drying apparatus

Abstract

The utility model discloses a low temperature vacuum belt drying equipment relates to the biopharmacy technical field, including the casing, base, the base sets up below casing is used for supporting casing, drive arrangement, including drive motor, drive wheel and auxiliary wheel, drive motor is driven the rotation of conveyer belt through drive wheel and auxiliary wheel, conveyer belt sets up in casing is used for conveying material, feeding device, including feed pipeline, feed port, feed flap and feed motor, feed pipeline is connected with casing top through feed port, and the feed flap is driven to open or close feed pipeline by feed motor. The utility model discloses the design structure is reasonable, it can adopt conveyer belt continuous conveying material, and combines even heating and vacuum low temperature drying technology, makes material even heating, water sublimate rapidly, and effectively shortens drying period, avoids the destruction of high temperature to heat-sensitive material simultaneously, guarantees the activity and quality of drying product.

Description

Technical Field

[0001] This utility model relates to the field of biopharmaceutical technology, specifically a low-temperature vacuum belt drying device. Background Technology

[0002] In the pharmaceutical manufacturing process, drying is a key step in removing moisture or solvents from drugs. Vacuum drying reduces environmental pressure, allowing materials to evaporate moisture rapidly at lower temperatures, making it suitable for heat-sensitive drugs.

[0003] Traditional belt dryers mostly use the principle of atmospheric pressure hot air drying, which heats the material on the conveyor belt by hot air convection to evaporate moisture. However, for heat-sensitive materials, such as certain pharmaceuticals, biological products or high-value-added foods, high drying temperatures can easily lead to the inactivation of their active ingredients, the destruction of nutrients, or the deterioration of product color, seriously affecting the quality of the final product.

[0004] Existing vacuum belt dryers create a low-pressure environment within a sealed chamber to lower the boiling point of materials, allowing moisture to evaporate rapidly at low temperatures and effectively protecting heat-sensitive components. However, each drying operation requires personnel to place the loaded drug into the vacuum dryer, increasing the workload of manual feeding and unloading, resulting in low overall efficiency and delays in drying time. Therefore, we offer a low-temperature vacuum belt dryer to address these issues. Utility Model Content

[0005] (a) Technical problems to be solved The purpose of this invention is to overcome the shortcomings of the existing technology and provide a low-temperature vacuum belt drying device.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a low-temperature vacuum belt drying device, comprising a shell; a base, the base being disposed below the shell for supporting the shell; a driving device, comprising a drive motor, a drive wheel, and an auxiliary wheel, the drive motor driving a conveyor belt to rotate via the drive wheel and the auxiliary wheel; a conveyor belt, disposed within the shell for conveying materials; a feeding device, comprising a feeding pipe, a feeding port, a feeding flap, and a feeding motor, the feeding pipe being connected to the upper part of the shell via the feeding port, the feeding flap being driven by the feeding motor to open or close the feeding pipe; a discharging device, comprising a discharging pipe, a discharging port, a discharging flap, and a discharging motor, the discharging pipe being connected to the lower part of the shell via the discharging port, the discharging flap being driven by the discharging motor to open or close the discharging pipe; a vacuum device, comprising a vacuum pipe and a vacuum pump, the vacuum pump being connected to the shell via the vacuum pipe for evacuating a vacuum; further comprising a temperature sensor, a pressure sensor, and a pressure relief valve for monitoring the temperature and pressure inside the shell and for pressure relief operations; and an electric heating wire for heating the interior of the shell.

[0007] Furthermore, the drive wheel and auxiliary wheel in the drive device are respectively located at both ends of the conveyor belt, the drive motor is connected to the drive wheel, and the other end of the drive wheel and both ends of the auxiliary wheel are inserted into the bearings embedded in the inner wall of the housing through a rotating shaft.

[0008] Furthermore, the feed flap and discharge flap are in a closed state during vacuum drying to maintain the vacuum environment inside the shell. Limiting plates are provided in the feed pipe and discharge pipe, which are located above the feed flap and discharge flap to limit their movement.

[0009] Furthermore, the feeding motor and the discharging motor are stepper motors or servo motors, which can precisely control the opening and closing angle of the flap.

[0010] Furthermore, the electric heating wire is integrated into the inner wall of the housing, below or around the conveyor belt, to uniformly heat the interior of the housing.

[0011] Furthermore, the temperature sensor and pressure sensor are installed on the surface of the housing, the sensing probe is located inside the housing and connected to the external control system to realize automated monitoring of the drying process, and the pressure relief valve is located on the side of the housing and communicates with the inside of the housing.

[0012] Furthermore, the shell has slots at both ends, and a locking block is provided in the slot. A feed baffle is locked to the end near the feed pipe by the locking block, and a discharge baffle is locked to the end near the discharge pipe by the locking block.

[0013] Furthermore, the housing is provided with sealing doors at both ends via hinges, and the sealing doors are provided with handles on their surfaces. The sealing doors and the housing are connected by a latch, and a sealing gasket is provided at the connection between the sealing doors and the housing.

[0014] (III) Beneficial Effects: Compared with existing technologies, this low-temperature vacuum belt drying equipment has the following advantages: I. This utility model uses a conveyor belt to continuously transport materials and combines uniform heating with vacuum low-temperature drying technology to ensure that the materials are heated evenly and the moisture sublimates rapidly, effectively shortening the drying cycle. At the same time, it avoids the damage of high temperature to heat-sensitive materials and ensures the activity and quality of the dried products.

[0015] Second, this utility model achieves multiple sealing protections by closing the feeding and discharging flaps during the drying process and using a limiting plate for precise positioning, combined with the sealing ring design at the vacuum pipeline. This ensures a high vacuum environment for the shell during the drying stage, improves drying efficiency, and reduces energy consumption.

[0016] Third, this utility model uses a drive wheel and an auxiliary wheel mounted in the housing via a shaft and bearings to support and drive the conveyor belt. The transmission system has a stable structure, ensuring that the conveyor belt runs smoothly for a long time. At the same time, the inclined guide design of the discharge baffle and the feed baffle effectively guides the material to fall and discharge, reducing the risk of material blockage and splashing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the shell in this utility model; Figure 3 This is a partial cross-sectional view of the shell structure in this utility model; Figure 4 This is a partial cross-sectional view of the shell structure in this utility model; Figure 5 This is a partial cross-sectional view of the shell structure in this utility model; Figure 6 This is a schematic diagram of the drive motor and conveyor belt in this utility model; Figure 7 This is a partial cross-sectional view of the shell and discharge baffle in this utility model; Figure 8 This is a partial enlarged cross-sectional view of the discharge pipe in this utility model; Figure 9 This is a partial cross-sectional view of the feed pipe in this utility model.

[0018] In the diagram: 1. Base; 2. Housing; 3. Hinge; 4. Sealing door; 5. Feed pipe; 6. Feed motor; 7. Feed inlet; 8. Vacuum pump; 9. Vacuum pipe; 10. Temperature sensor; 11. Pressure sensor; 12. Lock; 13. Handle; 14. Discharge pipe; 15. Fixing plate; 16. Drive motor; 17. Bearing; 18. Shaft; 19. Discharge baffle; 20. Slot; 21. Block; 22. Conveyor belt; 23. Feed baffle; 24. Auxiliary wheel; 25. Drive wheel; 26. Discharge motor; 27. Discharge port; 28. Discharge flap; 29. ​​Limiting plate; 30. Feed flap. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figure 1-9 As shown, this utility model provides a technical solution: a low-temperature vacuum belt drying device, including a base 1, a shell 2, a hinge 3, a sealing door 4, a feeding pipe 5, a feeding motor 6, a feeding port 7, a vacuum pump 8, a vacuum pipe 9, a temperature sensor 10, a pressure sensor 11, a latch 12, a handle 13, a discharge pipe 14, a fixing plate 15, a drive motor 16, a bearing 17, a rotating shaft 18, a discharge baffle 19, a slot 20, a locking block 21, a conveyor belt 22, a feeding baffle 23, an auxiliary wheel 24, a drive wheel 25, a discharge motor 26, a discharge port 27, a discharge flap 28, a limiting plate 29, and a feeding flap 30.

[0021] The base 1 is fixedly installed on the ground to stably support the fixed housing 2 above. The drive motor 16 drives the conveyor belt 22 to rotate through the drive wheel 25 and the auxiliary wheel 24. The drive wheel 25 and the auxiliary wheel 24 are respectively set at both ends of the conveyor belt 22 to form a transmission system. The conveyor belt 22 is made of high temperature and corrosion resistant mesh material and is used to convey materials in the housing 2. The other end of the drive wheel 25 and both ends of the auxiliary wheel 24 are inserted into the bearings 17 embedded in the inner wall of the housing 2 through the rotating shaft 18, which enables the conveyor belt 22 to move stably.

[0022] The feed pipe 5 is connected to the upper part of the shell 2 through the feed port 7. The material enters the shell 2 through the feed pipe 5. The feed flap 30 is driven by the feed motor 6 and can rotate inside the feed pipe 5 to open or close the pipe. Similarly, the discharge pipe 14 is connected to the lower part of the shell 2 through the discharge port 27. The discharge flap 28 is driven by the discharge motor 26 to control the opening and closing of the discharge pipe 14. During the vacuum drying process, the feed motor 6 and the discharge motor 26 drive the feed flap 30 and the discharge flap 28 to close. When closed, the limiting blocks fixed in the feed pipe 5 and the discharge pipe 14 will limit the feed flap 30 and the discharge flap 28 to seal the shell 2 and maintain the vacuum environment.

[0023] The electric heating wire is integrated into the inner wall of the housing 2 or near the conveyor belt 22 to uniformly heat the inside of the housing 2 and promote the drying of materials. The vacuum pump 8 is connected to the housing 2 through the vacuum pipe 9. A sealing ring is provided at the connection between the vacuum pipe 9 and the housing 2 to ensure vacuum sealing. When the vacuum pump 8 is working, it extracts the air inside the housing 2 to form a vacuum state.

[0024] Temperature sensor 10 and pressure sensor 11 are installed inside housing 2 to monitor changes in material temperature and pressure, respectively. The sensors are connected to an external control system (such as a PLC controller) to achieve automated management of the drying process. For example, when the temperature or pressure exceeds the set range, the control system can automatically adjust the operating parameters of the heating device or vacuum pump 8.

[0025] The feed baffle 23 near the feed pipe 5 is engaged in the groove in the housing 2 by the latch 21. When the material falls from the feed pipe 5, it can guide the material by tilting its surface. Similarly, the first baffle near the discharge pipe 14 also guides the material falling from the conveyor belt 22. When maintenance is required inside the housing 2, the sealing door 4 can be opened by pulling the handle 13 under the action of the hinge 3 after opening the latch 12.

[0026] Work process: During the feeding stage, the first preset program is set by the controller (such as PLC control). For example, the drive motor 16 rotates for two minutes to drive the conveyor belt 22 to travel half a circle. At the same time, the feed motor 6 in the feed pipe 5 will also drive the feed flap 30 to rotate counterclockwise by ninety degrees. The material in the feed pipe 5 will fall onto the conveyor belt 22 through the feed baffle 23. The drive motor 16 stops working and the feed motor 6 rotates clockwise by ninety degrees to return to its original position, so that the feed flap 30 seals the feed pipe 5. During the low-temperature drying stage, the vacuum pump 8 evacuates the inside of the housing 2 through the vacuum pipe 9. At the same time, the temperature sensor 10 and the pressure sensor 11 will also feed back the monitoring data to the controller. If the pressure reaches the preset value, the vacuum pump 8 will stop working. If the temperature is too low, the electric heating wire will be automatically started to work and stop heating when the preset value is reached. During the discharge stage, after the preset drying time is reached, the drying ends. The controller automatically opens the pressure relief valve on the side of the housing 2, starts the discharge motor 26 to drive the discharge flap 28 to rotate 90 degrees counterclockwise, and drives the motor 16 to bring the dried material on the conveyor belt 22 to the discharge port 27. The material will slide out from the discharge port 27 through the discharge pipe 14. The motor 16 will automatically stop after rotating for two minutes. The discharge motor 26 will drive the discharge flap 28 to rotate clockwise to reset, and continue to repeat the above process for drying. During maintenance and repair, the sealing door 4 can be opened by unlocking the latch 12 and pulling the handle 13. Then, the discharge baffle 19 and the feed baffle 23 can be removed to inspect the interior.

[0027] Material enters the housing 2 through the feed pipe 5 and falls onto the conveyor belt 22. The drive motor 16 starts, causing the conveyor belt 22 to move slowly, allowing the material to pass through the heating and vacuum drying zones inside the housing 2. The feed flap 30 and the discharge flap 28 are closed during drying to prevent vacuum leakage. After drying, the discharge flap 28 opens, and the material is discharged through the discharge pipe 14. Throughout the process, the monitoring device provides real-time data feedback to ensure stable drying conditions.

[0028] It should be noted that in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature vacuum belt drying device, characterized in that: Includes a housing (2); a base (1) provided below the housing (2) for supporting the housing (2); a drive device including a drive motor (16), a drive wheel (25) and an auxiliary wheel (24), wherein the drive motor (16) drives the conveyor belt (22) to rotate via the drive wheel (25) and the auxiliary wheel (24); the conveyor belt (22) provided inside the housing (2) for conveying materials; and a feeding device including a feeding pipe (5), a feeding port (7), a feeding flap (30) and a feeding motor (6), wherein the feeding pipe (5) is connected to the top of the housing (2) via the feeding port (7), and the feeding flap (30) is driven by the feeding motor (6) to open or close the feeding. Pipeline (5); discharge device, including discharge pipe (14), discharge port (27), discharge flap (28) and discharge motor (26), the discharge pipe (14) is connected to the bottom of the shell (2) through the discharge port (27), the discharge flap (28) is driven by the discharge motor (26) to open or close the discharge pipe (14); vacuum device, including vacuum pipe (9) and vacuum pump (8), the vacuum pump (8) is connected to the shell (2) through vacuum pipe (9) for vacuuming; also includes temperature sensor (10) and pressure sensor (11) and pressure relief valve for monitoring the temperature and pressure inside the shell (2) and pressure relief operation; electric heating wire for heating the inside of the shell (2).

2. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The drive wheel (25) and auxiliary wheel (24) in the drive device are respectively set at both ends of the conveyor belt (22). The drive motor (16) is connected to the drive wheel (25). The other end of the drive wheel (25) and both ends of the auxiliary wheel (24) are inserted into the bearing (17) embedded in the inner wall of the housing (2) through the rotating shaft (18).

3. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The feed flap (30) and discharge flap (28) are closed during vacuum drying to maintain the vacuum environment inside the shell (2). Limiting plates (29) are provided in the feed pipe (5) and discharge pipe (14). The limiting plates (29) are located above the feed flap (30) and discharge flap (28) to limit the feed flap (30) and discharge flap (28).

4. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The feeding motor (6) and the discharging motor (26) are stepper motors or servo motors, which can precisely control the opening and closing angle of the flap.

5. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The electric heating wire is integrated into the inner wall of the housing (2), below or around the conveyor belt (22), and heats the interior of the housing (2) evenly.

6. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The temperature sensor (10) and pressure sensor (11) are set on the surface of the housing (2), the sensing probe is located inside the housing (2) and connected to the external control system to realize the automated monitoring of the drying process, and the pressure relief valve is located on the side of the housing (2) and communicates with the inside of the housing (2).

7. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The shell (2) has slots (20) at both ends, and a block (21) is provided in the slot (20). A feed baffle (23) is connected to the end near the feed pipe (5) by the block (21), and a discharge baffle (19) is connected to the end near the discharge pipe (14) by the block (21).

8. The low-temperature vacuum belt drying equipment according to claim 1, characterized in that: The housing (2) has sealing doors (4) at both ends via hinges (3). The surface of the sealing door (4) is provided with a handle (13). The sealing door (4) and the housing (2) are connected by a latch (12). A sealing gasket is provided at the connection between the sealing door (4) and the housing (2).

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